X-Git-Url: https://git.immae.eu/?a=blobdiff_plain;f=bip39-standalone.html;h=a7d6ce9dbb594de298cecfe9847a9b36af1340d6;hb=64a7d2aad49ddbbcd2eabea8f98f7ff468ca7ccb;hp=2888d0349e6be943eaa317609592fb3e9781f9c7;hpb=434caecd96740bbec488429026830b5ad24f628a;p=perso%2FImmae%2FProjets%2FCryptomonnaies%2FBIP39.git

diff --git a/bip39-standalone.html b/bip39-standalone.html
index 2888d03..a7d6ce9 100644
--- a/bip39-standalone.html
+++ b/bip39-standalone.html
@@ -12,6 +12,7 @@
         <meta content="width=device-width, initial-scale=1.0" name="viewport" />
         <meta content="bitcoin mnemonic converter" name="description" />
         <meta content="Ian Coleman" name="author" />
+        <link type="image/x-icon" rel="icon" href="data:image/x-icon;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQEAYAAABPYyMiAAAABmJLR0T///////8JWPfcAAAACXBIWXMAAABIAAAASABGyWs+AAAAF0lEQVRIx2NgGAWjYBSMglEwCkbBSAcACBAAAeaR9cIAAAAASUVORK5CYII=" />
 
         <style>
             body {
@@ -186,9 +187,9 @@
                                     <label class="col-sm-3 control-label" data-translate>Mnemonic Length</label>
                                     <div class="col-sm-9">
                                         <select class="mnemonic-length form-control">
-                                            <option value="raw" data-translate>From entropy length (3 words per 32 bits)</option>
+                                            <option value="raw" selected data-translate>Use Raw Entropy (3 words per 32 bits)</option>
                                             <option value="12">12 <span data-translate>Words</span></option>
-                                            <option value="15" selected>15 <span data-translate>Words</option>
+                                            <option value="15">15 <span data-translate>Words</option>
                                             <option value="18">18 <span data-translate>Words</span></option>
                                             <option value="21">21 <span data-translate>Words</span></option>
                                             <option value="24">24 <span data-translate>Words</span></option>
@@ -371,6 +372,15 @@
                                         <a href="https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki" target="_blank">BIP32 spec</a>
                                     </p>
                                 </div>
+                                <div class="form-group">
+                                    <label for="bip32-client" class="col-sm-2 control-label" data-translate>Client</label>
+                                    <div class="col-sm-10">
+                                        <select id="bip32-client" class="client form-control">
+                                            <option value="custom">Custom derivation path</option>
+                                            <!-- populated by javascript -->
+                                        </select>
+                                    </div>
+                                </div>
                                 <div class="form-group">
                                     <label for="bip32-path" class="col-sm-2 control-label" data-translate>BIP32 Derivation Path</label>
                                     <div class="col-sm-10">
@@ -396,6 +406,18 @@
                                         </p>
                                     </div>
                                 </div>
+                                <div class="form-group">
+                                    <label for="core-path" class="col-sm-2 control-label" data-translate>Multibit</label>
+                                    <div class="col-sm-10">
+                                        <p class="form-control no-border">
+                                            <span data-translate-html>Use path <code>m/0'/0</code>.</span>
+                                        </p>
+                                        <p class="form-control no-border">
+                                            <span data-translate>For more info see</span>
+                                            <a href="https://multibit.org/" target="_blank">MultiBit HD</a>
+                                        </p>
+                                    </div>
+                                </div>
                                 <div class="form-group">
                                     <label class="col-sm-2 control-label" data-translate>Block Explorers</label>
                                     <div class="col-sm-10">
@@ -655,13009 +677,36018 @@
                 <td class="privkey"><span data-show-qr></span></td>
             </tr>
         </script>
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a=this.$target.scrollTop(),b=this.$element.offset();return this.pinnedOffset=b.top-a},c.prototype.checkPositionWithEventLoop=function(){setTimeout(a.proxy(this.checkPosition,this),1)},c.prototype.checkPosition=function(){if(this.$element.is(":visible")){var b=a(document).height(),d=this.$target.scrollTop(),e=this.$element.offset(),f=this.options.offset,g=f.top,h=f.bottom;"object"!=typeof f&&(h=g=f),"function"==typeof g&&(g=f.top(this.$element)),"function"==typeof h&&(h=f.bottom(this.$element));var i=null!=this.unpin&&d+this.unpin<=e.top?!1:null!=h&&e.top+this.$element.height()>=b-h?"bottom":null!=g&&g>=d?"top":!1;if(this.affixed!==i){null!=this.unpin&&this.$element.css("top","");var j="affix"+(i?"-"+i:""),k=a.Event(j+".bs.affix");this.$element.trigger(k),k.isDefaultPrevented()||(this.affixed=i,this.unpin="bottom"==i?this.getPinnedOffset():null,this.$element.removeClass(c.RESET).addClass(j).trigger(a.Event(j.replace("affix","affixed"))),"bottom"==i&&this.$element.offset({top:b-this.$element.height()-h}))}}};var d=a.fn.affix;a.fn.affix=b,a.fn.affix.Constructor=c,a.fn.affix.noConflict=function(){return a.fn.affix=d,this},a(window).on("load",function(){a('[data-spy="affix"]').each(function(){var c=a(this),d=c.data();d.offset=d.offset||{},d.offsetBottom&&(d.offset.bottom=d.offsetBottom),d.offsetTop&&(d.offset.top=d.offsetTop),b.call(c,d)})})}(jQuery);</script>
-        <script>(function() {
-  'use strict';
+        <script>// From
+// https://raw.githubusercontent.com/inexorabletash/polyfill/a6bc6ced78160c994f76a909b6ff6bbbab3d43de/es6.js
+// Required for ethereumjs-utils.js when run in phantomjs-2.1.1
+// but is not required in any modern browsers.
+// For more information, see
+// https://www.bountysource.com/issues/38485709-error-rendering-plot-with-phantomjs
+
+//----------------------------------------------------------------------
+//
+// ECMAScript 2015 Polyfills
+//
+//----------------------------------------------------------------------
 
-  /**
-   * Extend an Object with another Object's properties.
-   *
-   * The source objects are specified as additional arguments.
-   *
-   * @param dst Object the object to extend.
-   *
-   * @return Object the final object.
-   */
-  var _extend = function(dst) {
-    var sources = Array.prototype.slice.call(arguments, 1);
-    for (var i=0; i<sources.length; ++i) {
-      var src = sources[i];
-      for (var p in src) {
-        if (src.hasOwnProperty(p)) dst[p] = src[p];
-      }
+(function (global) {
+  "use strict";
+
+  // Set this to always override native implementations, for testing
+  // the polyfill in browsers with partial/full ES2015 support.
+  var OVERRIDE_NATIVE_FOR_TESTING = false;
+
+  var undefined = (void 0); // Paranoia
+
+  // Helpers
+
+  function strict(o) {
+    return o === global ? undefined : o;
+  }
+
+  function hook(o, p, f) {
+    var op = o[p];
+    console.assert(typeof op === 'function', 'Hooking a non-function');
+    o[p] = function() {
+      var o = strict(this);
+      var r = f.apply(o, arguments);
+      return r !== undefined ? r : op.apply(o, arguments);
+    };
+  }
+
+  function isSymbol(s) {
+    return (typeof s === 'symbol') || ('Symbol' in global && s instanceof global.Symbol);
+  }
+
+  function getPropertyDescriptor(target, name) {
+    var desc = Object.getOwnPropertyDescriptor(target, name);
+    var proto = Object.getPrototypeOf(target);
+    while (!desc && proto) {
+      desc = Object.getOwnPropertyDescriptor(proto, name);
+      proto = Object.getPrototypeOf(proto);
     }
-    return dst;
-  };
+    return desc;
+  }
 
+  var enqueue = (function(nativePromise, nativeSetImmediate) {
+    if (nativePromise)
+      return function(job) { nativePromise.resolve().then(function() { job(); }); };
+    if (nativeSetImmediate)
+      return function(job) { nativeSetImmediate(job); };
+    return function(job) { setTimeout(job, 0); };
+  }(global['Promise'], global['setImmediate']));
 
-  /**
-   * Defer execution of given function.
-   * @param  {Function} func
-   */
-  var _defer = function(func) {
-    if (typeof setImmediate === 'function') {
-      return setImmediate(func);
+  function define(o, p, v, override) {
+    if (p in o && !override && !OVERRIDE_NATIVE_FOR_TESTING)
+      return;
+
+    if (typeof v === 'function') {
+      // Sanity check that functions are appropriately named (where possible)
+      console.assert(isSymbol(p) || !('name' in v) || v.name === p || v.name === p + '_', 'Expected function name "' + p.toString() + '", was "' + v.name + '"');
+      Object.defineProperty(o, p, {
+        value: v,
+        configurable: true,
+        enumerable: false,
+        writable: true
+      });
     } else {
-      return setTimeout(func, 0);
+      Object.defineProperty(o, p, {
+        value: v,
+        configurable: false,
+        enumerable: false,
+        writable: false
+      });
     }
-  };
+  }
 
-  /**
-   * Based on the algorithm at http://en.wikipedia.org/wiki/Levenshtein_distance.
-   */
-  var Levenshtein = {
-    /**
-     * Calculate levenshtein distance of the two strings.
-     *
-     * @param str1 String the first string.
-     * @param str2 String the second string.
-     * @return Integer the levenshtein distance (0 and above).
-     */
-    get: function(str1, str2) {
-      // base cases
-      if (str1 === str2) return 0;
-      if (str1.length === 0) return str2.length;
-      if (str2.length === 0) return str1.length;
+  function set_internal(o, p, v) {
+    Object.defineProperty(o, p, {
+      value: v,
+      configurable: false,
+      enumerable: false,
+      writable: true
+    });
+  }
 
-      // two rows
-      var prevRow  = new Array(str2.length + 1),
-          curCol, nextCol, i, j, tmp;
+  // Snapshot intrinsic functions
+  var $isNaN = global.isNaN,
+      $parseInt = global.parseInt,
+      $parseFloat = global.parseFloat;
+
+  var E = Math.E,
+      LOG10E = Math.LOG10E,
+      LOG2E = Math.LOG2E,
+      abs = Math.abs,
+      ceil = Math.ceil,
+      exp = Math.exp,
+      floor = Math.floor,
+      log = Math.log,
+      max = Math.max,
+      min = Math.min,
+      pow = Math.pow,
+      random = Math.random,
+      sqrt = Math.sqrt;
+
+  var orig_match = String.prototype.match,
+      orig_replace = String.prototype.replace,
+      orig_search = String.prototype.search,
+      orig_split = String.prototype.split;
+
+  // These are used for implementing the polyfills, but not exported.
+
+  // Inspired by https://gist.github.com/1638059
+  /** @constructor */
+  function EphemeronTable() {
+    var secretKey = ObjectCreate(null);
+
+    function conceal(o) {
+      var oValueOf = o.valueOf, secrets = ObjectCreate(null);
+      Object.defineProperty(o, 'valueOf', {
+          value: (function(secretKey) {
+            return function (k) {
+              return (k === secretKey) ? secrets : oValueOf.apply(o, arguments);
+            };
+          }(secretKey)),
+        configurable: true,
+        writeable: true,
+        enumerable: false
+        });
+      return secrets;
+    }
 
-      // initialise previous row
-      for (i=0; i<prevRow.length; ++i) {
-        prevRow[i] = i;
+    function reveal(o) {
+      var v = typeof o.valueOf === 'function' && o.valueOf(secretKey);
+      return v === o ? null : v;
+    }
+
+    return {
+      clear: function() {
+        secretKey = ObjectCreate(null);
+      },
+      remove: function(key) {
+        var secrets = reveal(key);
+        if (secrets && HasOwnProperty(secrets, 'value')) {
+          delete secrets.value;
+          return true;
+        }
+        return false;
+      },
+      get: function(key, defaultValue) {
+        var secrets = reveal(key);
+        return (secrets && HasOwnProperty(secrets, 'value')) ? secrets.value : defaultValue;
+      },
+      has: function(key) {
+        var secrets = reveal(key);
+        return Boolean(secrets && HasOwnProperty(secrets, 'value'));
+      },
+      set: function(key, value) {
+        var secrets = reveal(key) || conceal(key);
+        secrets.value = value;
       }
+    };
+  }
 
-      // calculate current row distance from previous row
-      for (i=0; i<str1.length; ++i) {
-        nextCol = i + 1;
+  var empty = Object.create(null);
 
-        for (j=0; j<str2.length; ++j) {
-          curCol = nextCol;
+  //----------------------------------------------------------------------
+  //
+  // ECMAScript 2015
+  // http://www.ecma-international.org/ecma-262/6.0/
+  //
+  //----------------------------------------------------------------------
 
-          // substution
-          nextCol = prevRow[j] + ( (str1.charAt(i) === str2.charAt(j)) ? 0 : 1 );
-          // insertion
-          tmp = curCol + 1;
-          if (nextCol > tmp) {
-            nextCol = tmp;
-          }
-          // deletion
-          tmp = prevRow[j + 1] + 1;
-          if (nextCol > tmp) {
-            nextCol = tmp;
-          }
+  // ---------------------------------------
+  // 19.4 Symbol Objects
+  // ---------------------------------------
 
-          // copy current col value into previous (in preparation for next iteration)
-          prevRow[j] = curCol;
-        }
+  // NOTE: Symbols are defined here - out of spec order - since we need the
+  // properties and prototype to be populated for other polyfills.
 
-        // copy last col value into previous (in preparation for next iteration)
-        prevRow[j] = nextCol;
-      }
+  // NOTE: Not secure, nor is obj[$$symbol] hidden from Object.keys()
 
-      return nextCol;
-    },
+  var symbolForKey;
+  (function() {
+    var secret = Object.create(null);
+    var symbolMap = {};
+    symbolForKey = function(k) {
+      return symbolMap[k];
+    };
 
-    /**
-     * Asynchronously calculate levenshtein distance of the two strings.
-     *
-     * @param str1 String the first string.
-     * @param str2 String the second string.
-     * @param cb Function callback function with signature: function(Error err, int distance)
-     * @param [options] Object additional options.
-     * @param [options.progress] Function progress callback with signature: function(percentComplete)
-     */
-    getAsync: function(str1, str2, cb, options) {
-      options = _extend({}, {
-        progress: null
-      }, options);
+    var GlobalSymbolRegistry = [];
 
-      // base cases
-      if (str1 === str2) return cb(null, 0);
-      if (str1.length === 0) return cb(null, str2.length);
-      if (str2.length === 0) return cb(null, str1.length);
+    function unique(bits) {
+      return Array(bits + 1).join('x').replace(/x/g, function() {
+        return random() < 0.5 ? '\u200C' : '\u200D'; // JWNJ / ZWJ
+      });
+    }
 
-      // two rows
-      var prevRow  = new Array(str2.length + 1),
-          curCol, nextCol,
-          i, j, tmp,
-          startTime, currentTime;
+    // 19.4.1 The Symbol Constructor
+    // 19.4.1.1 Symbol ( description=undefined )
+    function Symbol(description) {
+      if (!(this instanceof Symbol)) return new Symbol(description, secret);
+      if (this instanceof Symbol && arguments[1] !== secret) throw TypeError();
 
-      // initialise previous row
-      for (i=0; i<prevRow.length; ++i) {
-        prevRow[i] = i;
+      var descString = description === undefined ? undefined : String(description);
+
+      set_internal(this, '[[SymbolData]]', unique(128));
+      set_internal(this, '[[Description]]', descString);
+
+      symbolMap[this] = this;
+      return this;
+    }
+
+    if (!('Symbol' in global) || OVERRIDE_NATIVE_FOR_TESTING)
+      global.Symbol = Symbol;
+
+    // 19.4.2 Properties of the Symbol Constructor
+
+    // 19.4.2.1 Symbol.for (key)
+    define(Symbol, 'for', function for_(key) {
+      var stringKey = String(key);
+      for (var i = 0; i < GlobalSymbolRegistry.length; ++i) {
+        var e = GlobalSymbolRegistry[i];
+        if (SameValue(e['[[key]]'], stringKey)) return e['[[symbol]]'];
       }
+      var newSymbol = Symbol(key);
+      GlobalSymbolRegistry.push({'[[key]]': stringKey, '[[symbol]]': newSymbol});
+      return newSymbol;
+    });
 
-      nextCol = 1;
-      i = 0;
-      j = -1;
+    // 19.4.2.2 Symbol.hasInstance
+    // 19.4.2.3 Symbol.isConcatSpreadable
 
-      var __calculate = function() {
-        // reset timer
-        startTime = new Date().valueOf();
-        currentTime = startTime;
+    // 19.4.2.4 Symbol.iterator
+    define(global.Symbol, 'iterator', global.Symbol('Symbol.iterator'));
 
-        // keep going until one second has elapsed
-        while (currentTime - startTime < 1000) {
-          // reached end of current row?
-          if (str2.length <= (++j)) {
-            // copy current into previous (in preparation for next iteration)
-            prevRow[j] = nextCol;
+    // 19.4.2.5 Symbol.keyFor (sym)
+    define(Symbol, 'keyFor', function keyFor(sym) {
+      if (!(sym instanceof Symbol)) throw TypeError();
+      for (var i = 0; i < GlobalSymbolRegistry.length; ++i) {
+        var e = GlobalSymbolRegistry[i];
+        if (SameValue(e['[[symbol]]'], sym)) return e['[[key]]'];
+      }
+      return undefined;
+    });
 
-            // if already done all chars
-            if (str1.length <= (++i)) {
-              return cb(null, nextCol);
-            }
-            // else if we have more left to do
-            else {
-              nextCol = i + 1;
-              j = 0;
-            }
-          }
+    // 19.4.2.6 Symbol.match
+    define(global.Symbol, 'match', global.Symbol('Symbol.match'));
 
-          // calculation
-          curCol = nextCol;
+    // 19.4.2.7 Symbol.prototype
 
-          // substution
-          nextCol = prevRow[j] + ( (str1.charAt(i) === str2.charAt(j)) ? 0 : 1 );
-          // insertion
-          tmp = curCol + 1;
-          if (nextCol > tmp) {
-            nextCol = tmp;
-          }
-          // deletion
-          tmp = prevRow[j + 1] + 1;
-          if (nextCol > tmp) {
-            nextCol = tmp;
-          }
+    // 19.4.2.8 Symbol.replace
+    define(global.Symbol, 'replace', global.Symbol('Symbol.replace'));
 
-          // copy current into previous (in preparation for next iteration)
-          prevRow[j] = curCol;
+    // 19.4.2.9 Symbol.search
+    define(global.Symbol, 'search', global.Symbol('Symbol.search'));
 
-          // get current time
-          currentTime = new Date().valueOf();
-        }
+    // 19.4.2.10 Symbol.species
 
-        // send a progress update?
-        if (null !== options.progress) {
-          try {
-            options.progress.call(null, (i * 100.0/ str1.length));
-          } catch (err) {
-            return cb('Progress callback: ' + err.toString());
-          }
-        }
+    // 19.4.2.11 Symbol.search
+    define(global.Symbol, 'split', global.Symbol('Symbol.split'));
 
-        // next iteration
-        _defer(__calculate);
-      };
+    // 19.4.2.12 Symbol.toPrimitive
 
-      __calculate();
-    }
+    // 19.4.2.13 Symbol.toStringTag
+    define(global.Symbol, 'toStringTag', global.Symbol('Symbol.toStringTag'));
 
-  };
+    // 19.4.2.14 Symbol.unscopables
 
-  // amd
-  if (typeof define !== "undefined" && define !== null && define.amd) {
-    define(function() {
-      return Levenshtein;
-    });
+    // 19.4.3 Properties of the Symbol Prototype Object
+    // 19.4.3.1 Symbol.prototype.constructor
+
+    // 19.4.3.2 Symbol.prototype.toString ( )
+    Object.defineProperty(Symbol.prototype, 'toString', {
+      value: function toString() {
+        var s = strict(this);
+        var desc = s['[[Description]]'];
+        return 'Symbol(' + (desc === undefined ? '' : desc) + s['[[SymbolData]]'] + ')';
+      },
+      configurable: true, writeable: true, enumerable: false });
+
+    // 19.4.3.3 Symbol.prototype.valueOf ( )
+    Object.defineProperty(Symbol.prototype, 'valueOf', {
+      value: function valueOf() {
+        // To prevent automatic string conversion:
+        throw TypeError();
+
+        // Spec has approximately the following:
+        //var s = strict(this);
+        //if (Type(s) === 'symbol') return s;
+        //if (Type(s) !== 'object') throw TypeError();
+        //if (!('[[SymbolData]]' in s)) throw TypeError();
+        //return s['[[SymbolData]]'];
+      },
+      configurable: true, writeable: true, enumerable: false });
+
+    // 19.4.3.4 Symbol.prototype [ @@toStringTag ]
+    // (Done later to polyfill partial implementations)
+
+    // 19.4.4 Properties of Symbol Instances
+  }());
+
+  console.assert(typeof global.Symbol() === 'symbol' || symbolForKey(String(global.Symbol('x'))));
+
+  // Defined here so that other prototypes can reference it
+  // 25.1.2 The %IteratorPrototype% Object
+  var $IteratorPrototype$ = {};
+
+  //----------------------------------------
+  // 6 ECMAScript Data Types and Values
+  //----------------------------------------
+
+  // 6.1 ECMAScript Language Types
+
+  // "Type(x)" is used as shorthand for "the type of x"...
+  function Type(v) {
+    switch (typeof v) {
+    case 'undefined': return 'undefined';
+    case 'boolean': return 'boolean';
+    case 'number': return 'number';
+    case 'string': return 'string';
+    case 'symbol': return 'symbol';
+    default:
+      if (v === null) return 'null';
+      if (v instanceof global.Symbol) return 'symbol';
+      return 'object';
+    }
   }
-  // commonjs
-  else if (typeof module !== "undefined" && module !== null && typeof exports !== "undefined" && module.exports === exports) {
-    module.exports = Levenshtein;
+
+  // 6.1.5.1 Well-Known Symbols
+  var $$iterator = global.Symbol.iterator,
+      $$match = global.Symbol.match,
+      $$replace = global.Symbol.replace,
+      $$search = global.Symbol.search,
+      $$split = global.Symbol.split,
+      $$toStringTag = global.Symbol.toStringTag;
+
+  //----------------------------------------
+  // 7 Abstract Operations
+  //----------------------------------------
+
+  //----------------------------------------
+  // 7.1 Type Conversion
+  //----------------------------------------
+
+  // 7.1.1 ToPrimitive ( input [, PreferredType] )
+  // just use valueOf()
+
+  // 7.1.2 ToBoolean ( argument )
+  // just use Boolean()
+
+  // 7.1.3 ToNumber ( argument )
+  // just use Number()
+
+  // 7.1.4 ToInteger ( argument )
+  function ToInteger(n) {
+    n = Number(n);
+    if ($isNaN(n)) return 0;
+    if (n === 0 || n === Infinity || n === -Infinity) return n;
+    return ((n < 0) ? -1 : 1) * floor(abs(n));
   }
-  // web worker
-  else if (typeof self !== "undefined" && typeof self.postMessage === 'function' && typeof self.importScripts === 'function') {
-    self.Levenshtein = Levenshtein;
+
+  // 7.1.5 ToInt32 ( argument )
+  function ToInt32(v) { return v >> 0; }
+
+  // 7.1.6 ToUint32 ( argument )
+  function ToUint32(v) { return v >>> 0; }
+
+  // 7.1.7 ToInt16 ( argument )
+  function ToInt16(v) { return (v << 16) >> 16; }
+
+  // 7.1.8 ToUint16 ( argument )
+  function ToUint16(v) { return v & 0xFFFF; }
+
+  // 7.1.9 ToInt8 ( argument )
+  function ToInt8(v) { return (v << 24) >> 24; }
+
+  // 7.1.10 ToUint8 ( argument )
+  function ToUint8(v) { return v & 0xFF; }
+
+  // 7.1.11 ToUint8Clamp ( argument )
+  function ToUint8Clamp(argument) {
+    var number = Number(argument);
+    if ($isNaN(number)) return 0;
+    if (number <= 0) return 0;
+    if (number >= 255) return 255;
+    var f = floor(number);
+    if ((f + 0.5) < number) return f + 1;
+    if (number < (f + 0.5)) return f;
+    if (f % 2) return f + 1;
+    return f;
   }
-  // browser main thread
-  else if (typeof window !== "undefined" && window !== null) {
-    window.Levenshtein = Levenshtein;
+
+  // 7.1.12 ToString ( argument )
+  // just use String()
+
+  // 7.1.13 ToObject ( argument )
+  function ToObject(v) {
+    if (v === null || v === undefined) throw TypeError();
+    return Object(v);
   }
-}());
 
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-(a-1)+2];case 2:return p.RS_BLOCK_TABLE[4*(a-1)+3]}};t.prototype={get:function(a){return 1==(this.buffer[Math.floor(a/8)]>>>7-a%8&1)},put:function(a,c){for(var d=0;d<c;d++)this.putBit(1==(a>>>c-d-1&1))},getLengthInBits:function(){return this.length},putBit:function(a){var c=Math.floor(this.length/8);this.buffer.length<=c&&this.buffer.push(0);a&&(this.buffer[c]|=128>>>this.length%8);this.length++}};"string"===typeof h&&(h={text:h});h=r.extend({},{render:"canvas",width:256,height:256,typeNumber:-1,
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-// (public) Constructor
-function BigInteger(a, b, c) {
-  if (!(this instanceof BigInteger))
-    return new BigInteger(a, b, c)
+  // 7.1.14 ToPropertyKey ( argument )
+  function ToPropertyKey(v) {
+    return String(v);
+  }
 
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-    if ("number" == typeof a) this.fromNumber(a, b, c)
-    else if (b == null && "string" != typeof a) this.fromString(a, 256)
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+  // 7.1.15 ToLength ( argument )
+  function ToLength(v) {
+    var len = ToInteger(v);
+    if (len <= 0) return 0;
+    if (len === Infinity) return 0x20000000000000 - 1; // 2^53-1
+    return min(len, 0x20000000000000 - 1); // 2^53-1
   }
-}
 
-var proto = BigInteger.prototype
+  // 7.1.16 CanonicalNumericIndexString ( argument )
 
-// duck-typed isBigInteger
-proto.__bigi = require('../package.json').version
-BigInteger.isBigInteger = function (obj, check_ver) {
-  return obj && obj.__bigi && (!check_ver || obj.__bigi === proto.__bigi)
-}
+  //----------------------------------------
+  // 7.2 Testing and Comparison Operations
+  //----------------------------------------
 
-// Bits per digit
-var dbits
+  // 7.2.1 RequireObjectCoercible ( argument )
+  // 7.2.2 IsArray ( argument )
 
-// am: Compute w_j += (x*this_i), propagate carries,
-// c is initial carry, returns final carry.
-// c < 3*dvalue, x < 2*dvalue, this_i < dvalue
-// We need to select the fastest one that works in this environment.
+  // 7.2.3 IsCallable ( argument )
+  function IsCallable(o) { return typeof o === 'function'; }
 
-// am1: use a single mult and divide to get the high bits,
-// max digit bits should be 26 because
-// max internal value = 2*dvalue^2-2*dvalue (< 2^53)
-function am1(i, x, w, j, c, n) {
-  while (--n >= 0) {
-    var v = x * this[i++] + w[j] + c
-    c = Math.floor(v / 0x4000000)
-    w[j++] = v & 0x3ffffff
-  }
-  return c
-}
-// am2 avoids a big mult-and-extract completely.
-// Max digit bits should be <= 30 because we do bitwise ops
-// on values up to 2*hdvalue^2-hdvalue-1 (< 2^31)
-function am2(i, x, w, j, c, n) {
-  var xl = x & 0x7fff,
-    xh = x >> 15
-  while (--n >= 0) {
-    var l = this[i] & 0x7fff
-    var h = this[i++] >> 15
-    var m = xh * l + h * xl
-    l = xl * l + ((m & 0x7fff) << 15) + w[j] + (c & 0x3fffffff)
-    c = (l >>> 30) + (m >>> 15) + xh * h + (c >>> 30)
-    w[j++] = l & 0x3fffffff
+  // 7.2.4 IsConstructor ( argument )
+  function IsConstructor(o) {
+    // Hacks for Safari 7 TypedArray XXXConstructor objects
+    if (/Constructor/.test(Object.prototype.toString.call(o))) return true;
+    if (/Function/.test(Object.prototype.toString.call(o))) return true;
+    // TODO: Can this be improved on?
+    return typeof o === 'function';
   }
-  return c
-}
-// Alternately, set max digit bits to 28 since some
-// browsers slow down when dealing with 32-bit numbers.
-function am3(i, x, w, j, c, n) {
-  var xl = x & 0x3fff,
-    xh = x >> 14
-  while (--n >= 0) {
-    var l = this[i] & 0x3fff
-    var h = this[i++] >> 14
-    var m = xh * l + h * xl
-    l = xl * l + ((m & 0x3fff) << 14) + w[j] + c
-    c = (l >> 28) + (m >> 14) + xh * h
-    w[j++] = l & 0xfffffff
+
+  // 7.2.5 IsExtensible (O)
+  // 7.2.6 IsInteger ( argument )
+
+  // 7.2.7 IsPropertyKey ( argument )
+  function IsPropertyKey(argument) {
+    if (Type(argument) === 'string') return true;
+    if (Type(argument) === 'symbol') return true;
+    return false;
   }
-  return c
-}
 
-// wtf?
-BigInteger.prototype.am = am1
-dbits = 26
+  // 7.2.8 IsRegExp ( argument )
+  // 7.2.5 IsConstructor ( argument )
 
-BigInteger.prototype.DB = dbits
-BigInteger.prototype.DM = ((1 << dbits) - 1)
-var DV = BigInteger.prototype.DV = (1 << dbits)
+  // 7.2.9 SameValue(x, y)
+  function SameValue(x, y) {
+    if (typeof x !== typeof y) return false;
+    switch (typeof x) {
+    case 'undefined':
+      return true;
+    case 'number':
+      if (x !== x && y !== y) return true;
+      if (x === 0 && y === 0) return 1/x === 1/y;
+      return x === y;
+    case 'boolean':
+    case 'string':
+    case 'object':
+    default:
+      return x === y;
+    }
+  }
 
-var BI_FP = 52
-BigInteger.prototype.FV = Math.pow(2, BI_FP)
-BigInteger.prototype.F1 = BI_FP - dbits
-BigInteger.prototype.F2 = 2 * dbits - BI_FP
+  // 7.2.10 SameValueZero(x, y)
+  function SameValueZero(x, y) {
+    if (typeof x !== typeof y) return false;
+    switch (typeof x) {
+    case 'undefined':
+      return true;
+    case 'number':
+      if (x !== x && y !== y) return true;
+      return x === y;
+    case 'boolean':
+    case 'string':
+    case 'object':
+    default:
+      return x === y;
+    }
+  }
 
-// Digit conversions
-var BI_RM = "0123456789abcdefghijklmnopqrstuvwxyz"
-var BI_RC = new Array()
-var rr, vv
-rr = "0".charCodeAt(0)
-for (vv = 0; vv <= 9; ++vv) BI_RC[rr++] = vv
-rr = "a".charCodeAt(0)
-for (vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv
-rr = "A".charCodeAt(0)
-for (vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv
+  //----------------------------------------
+  // 7.3 Operations on Objects
+  //----------------------------------------
 
-function int2char(n) {
-  return BI_RM.charAt(n)
-}
+  // 7.3.1 Get (O, P)
+  // - just use o.p or o[p]
 
-function intAt(s, i) {
-  var c = BI_RC[s.charCodeAt(i)]
-  return (c == null) ? -1 : c
-}
+  // 7.3.2 GetV (V, P)
+  function GetV(v, p) {
+    var o = ToObject(v);
+    return o[p];
+  }
 
-// (protected) copy this to r
-function bnpCopyTo(r) {
-  for (var i = this.t - 1; i >= 0; --i) r[i] = this[i]
-  r.t = this.t
-  r.s = this.s
-}
+  // 7.3.3 Set (O, P, V, Throw)
+  // - just use o.p = v or o[p] = v
 
-// (protected) set from integer value x, -DV <= x < DV
-function bnpFromInt(x) {
-  this.t = 1
-  this.s = (x < 0) ? -1 : 0
-  if (x > 0) this[0] = x
-  else if (x < -1) this[0] = x + DV
-  else this.t = 0
-}
 
-// return bigint initialized to value
-function nbv(i) {
-  var r = new BigInteger()
-  r.fromInt(i)
-  return r
-}
 
-// (protected) set from string and radix
-function bnpFromString(s, b) {
-  var self = this
 
-  var k
-  if (b == 16) k = 4
-  else if (b == 8) k = 3
-  else if (b == 256) k = 8; // byte array
-  else if (b == 2) k = 1
-  else if (b == 32) k = 5
-  else if (b == 4) k = 2
-  else {
-    self.fromRadix(s, b)
-    return
+  // 7.3.9 GetMethod (O, P)
+  function GetMethod(o, p) {
+    var func = GetV(o, p);
+    if (func === undefined || func === null) return undefined;
+    if (!IsCallable(func)) throw TypeError();
+    return func;
   }
-  self.t = 0
-  self.s = 0
-  var i = s.length,
-    mi = false,
-    sh = 0
-  while (--i >= 0) {
-    var x = (k == 8) ? s[i] & 0xff : intAt(s, i)
-    if (x < 0) {
-      if (s.charAt(i) == "-") mi = true
-      continue
+
+  // 7.3.10 HasProperty (O, P)
+  function HasProperty(o, p) {
+    while (o) {
+      if (Object.prototype.hasOwnProperty.call(o, p)) return true;
+      if (Type(o) !== 'object') return false;
+      o = Object.getPrototypeOf(o);
     }
-    mi = false
-    if (sh == 0)
-      self[self.t++] = x
-    else if (sh + k > self.DB) {
-      self[self.t - 1] |= (x & ((1 << (self.DB - sh)) - 1)) << sh
-      self[self.t++] = (x >> (self.DB - sh))
-    } else
-      self[self.t - 1] |= x << sh
-    sh += k
-    if (sh >= self.DB) sh -= self.DB
+    return false;
   }
-  if (k == 8 && (s[0] & 0x80) != 0) {
-    self.s = -1
-    if (sh > 0) self[self.t - 1] |= ((1 << (self.DB - sh)) - 1) << sh
+
+  // 7.3.11 HasOwnProperty (O, P)
+  function HasOwnProperty(o, p) {
+    return Object.prototype.hasOwnProperty.call(o, p);
   }
-  self.clamp()
-  if (mi) BigInteger.ZERO.subTo(self, self)
-}
 
-// (protected) clamp off excess high words
-function bnpClamp() {
-  var c = this.s & this.DM
-  while (this.t > 0 && this[this.t - 1] == c)--this.t
-}
+  //----------------------------------------
+  // 7.4 Operations on Iterator Objects
+  //----------------------------------------
 
-// (public) return string representation in given radix
-function bnToString(b) {
-  var self = this
-  if (self.s < 0) return "-" + self.negate()
-    .toString(b)
-  var k
-  if (b == 16) k = 4
-  else if (b == 8) k = 3
-  else if (b == 2) k = 1
-  else if (b == 32) k = 5
-  else if (b == 4) k = 2
-  else return self.toRadix(b)
-  var km = (1 << k) - 1,
-    d, m = false,
-    r = "",
-    i = self.t
-  var p = self.DB - (i * self.DB) % k
-  if (i-- > 0) {
-    if (p < self.DB && (d = self[i] >> p) > 0) {
-      m = true
-      r = int2char(d)
-    }
-    while (i >= 0) {
-      if (p < k) {
-        d = (self[i] & ((1 << p) - 1)) << (k - p)
-        d |= self[--i] >> (p += self.DB - k)
-      } else {
-        d = (self[i] >> (p -= k)) & km
-        if (p <= 0) {
-          p += self.DB
-          --i
-        }
-      }
-      if (d > 0) m = true
-      if (m) r += int2char(d)
-    }
+  // 7.4.1 GetIterator ( obj, method )
+  function GetIterator(obj, method) {
+    if (arguments.length < 2)
+      method = GetMethod(obj, $$iterator);
+    var iterator = method.call(obj);
+    if (Type(iterator) !== 'object') throw TypeError();
+    return iterator;
   }
-  return m ? r : "0"
-}
 
-// (public) -this
-function bnNegate() {
-  var r = new BigInteger()
+  // 7.4.2 IteratorNext ( iterator, value )
+  function IteratorNext(iterator, value) {
+    if (arguments.length < 2)
+      var result = iterator.next();
+    else
+      result = iterator.next(value);
+    if (Type(result) !== 'object') throw TypeError();
+    return result;
+  }
+
+  // 7.4.3 IteratorComplete ( iterResult )
+  function IteratorComplete(iterResult) {
+    console.assert(Type(iterResult) === 'object');
+    return Boolean(iterResult.done);
+  }
+
+  // 7.4.4 IteratorValue ( iterResult )
+  function IteratorValue(iterResult) {
+    console.assert(Type(iterResult) === 'object');
+    return iterResult.value;
+  }
+
+  // 7.4.5 IteratorStep ( iterator )
+  function IteratorStep( iterator, value ) {
+    var result = IteratorNext(iterator, value);
+    var done = result['done'];
+    if (Boolean(done) === true) return false;
+    return result;
+  }
+
+  // 7.4.6 IteratorClose( iterator, completion )
+  function IteratorClose( iterator, completion ) {
+    console.assert(Type(iterator) === 'object');
+    var _return = GetMethod(iterator, 'return');
+    if (_return === undefined) return completion;
+    try {
+      var innerResult = _return[iterator]();
+    } catch (result) {
+      // TODO: If completion.[[type]] is throw, return completion
+      return result;
+    }
+    if (Type(innerResult) !== 'object') throw TypeError();
+    return completion;
+  }
+
+  // 7.4.7 CreateIterResultObject (value, done)
+  function CreateIterResultObject(value, done) {
+    console.assert(Type(done) === 'boolean');
+    var obj = {};
+    obj["value"] = value;
+    obj["done"] = done;
+    return obj;
+  }
+
+  // 7.4.8 CreateListIterator (list)
+  // 7.4.8.1 ListIterator next( )
+  // 7.4.9 CreateCompoundIterator ( iterator1, iterator2 )
+  // 7.4.9.1 CompoundIterator next( )
+
+  //----------------------------------------
+  // 8 Executable Code and Execution Contexts
+  //----------------------------------------
+
+  //----------------------------------------
+  // 8.4 Jobs and Job Queues
+  //----------------------------------------
+
+  // 8.4.1 EnqueueJob ( queueName, job, arguments)
+  function EnqueueJob(queueName, job, args) {
+    var fn = function() { job.apply(undefined, args); };
+    enqueue(fn);
+  }
+
+  // 8.4.2 NextJob result
+  function NextJob(result) {
+    // no-op
+  }
+
+  //----------------------------------------
+  // 9 Ordinary and Exotic Objects Behaviors
+  //----------------------------------------
+
+  // 9.1.11 [[Enumerate]] ()
+  function Enumerate(obj) {
+    var e = [];
+    if (Object(obj) !== obj) return e;
+    var visited = new Set;
+    while (obj !== null) {
+      Object.getOwnPropertyNames(obj).forEach(function(name) {
+        if (!visited.has(name)) {
+          var desc = Object.getOwnPropertyDescriptor(obj, name);
+          if (desc) {
+            visited.add(name);
+            if (desc.enumerable) e.push(name);
+          }
+        }
+      });
+      obj = Object.getPrototypeOf(obj);
+    }
+    return e[$$iterator]();
+  }
+
+  // 9.1.12 [[OwnPropertyKeys]] ( )
+  function OwnPropertyKeys(o) {
+    return Object.getOwnPropertyNames(o);
+  }
+
+  // 9.1.13 ObjectCreate(proto, internalSlotsList)
+  function ObjectCreate(proto, internalSlotsList) {
+    return Object.create(proto, internalSlotsList);
+  }
+
+  // ---------------------------------------
+  // 19 Fundamental Objects
+  // ---------------------------------------
+
+  // ---------------------------------------
+  // 19.1 Object Objects
+  // ---------------------------------------
+
+  // 19.1.1 The Object Constructor
+  // 19.1.1.1 Object ( [ value ] )
+  // 19.1.2 Properties of the Object Constructor
+  // 19.1.2.1 Object.assign ( target, ...sources )
+  define(
+    Object, 'assign',
+    function assign(target, /*...*/sources) {
+      var to = ToObject(target);
+      if (arguments.length < 2) return to;
+
+      var sourcesIndex = 1;
+      while (sourcesIndex < arguments.length) {
+        var nextSource = arguments[sourcesIndex++];
+        if (nextSource === undefined || nextSource === null) {
+          var keys = [];
+        } else {
+          var from = ToObject(nextSource);
+          keys = OwnPropertyKeys(from);
+        }
+        for (var keysIndex = 0; keysIndex < keys.length; ++keysIndex) {
+          var nextKey = keys[keysIndex];
+          var desc = Object.getOwnPropertyDescriptor(from, nextKey);
+          if (desc !== undefined && desc.enumerable) {
+            var propValue = from[nextKey];
+            to[nextKey] = propValue;
+          }
+        }
+      }
+      return to;
+    });
+
+  // 19.1.2.2 Object.create ( O [ , Properties ] )
+  // 19.1.2.3 Object.defineProperties ( O, Properties )
+  // 19.1.2.4 Object.defineProperty ( O, P, Attributes )
+  // 19.1.2.5 Object.freeze ( O )
+  // 19.1.2.6 Object.getOwnPropertyDescriptor ( O, P )
+
+  (function() {
+    var nativeSymbols = (typeof global.Symbol() === 'symbol'),
+        $getOwnPropertyNames = Object.getOwnPropertyNames,
+        $keys = Object.keys,
+        $window_names = (typeof window === 'object' ? $getOwnPropertyNames(window) : []);
+
+    function isStringKey(k) { return !symbolForKey(k); }
+
+    // 19.1.2.7 Object.getOwnPropertyNames ( O )
+    define(
+      Object, 'getOwnPropertyNames',
+      function getOwnPropertyNames(o) {
+        if (Object.prototype.toString.call(o) === '[object Window]') {
+          // Workaround for cross-realm calling by IE itself.
+          // https://github.com/inexorabletash/polyfill/issues/96
+          try {
+            return $getOwnPropertyNames(o).filter(isStringKey);
+          } catch (_) {
+            return $window_names.slice();
+          }
+        }
+        return $getOwnPropertyNames(o).filter(isStringKey);
+      }, !nativeSymbols);
+
+    // 19.1.2.8 Object.getOwnPropertySymbols ( O )
+    define(
+      Object, 'getOwnPropertySymbols',
+      function getOwnPropertySymbols(o) {
+        return $getOwnPropertyNames(o).filter(symbolForKey).map(symbolForKey);
+      }, !nativeSymbols);
+
+    // 19.1.2.14 Object.keys ( O )
+    define(
+      Object, 'keys',
+      function keys(o) {
+        return $keys(o).filter(isStringKey);
+      }, !nativeSymbols);
+  }());
+
+  // 19.1.2.9 Object.getPrototypeOf ( O )
+  // 19.1.2.10 Object.is ( value1, value2 )
+  define(
+    Object, 'is',
+    function is(value1, value2) {
+      return SameValue(value1, value2);
+    });
+
+  // 19.1.2.11 Object.isExtensible ( O )
+  // 19.1.2.12 Object.isFrozen ( O )
+  // 19.1.2.13 Object.isSealed ( O )
+
+  // 19.1.2.14 Object.keys ( O )
+  // see above
+
+  // 19.1.2.15 Object.preventExtensions ( O )
+  // 19.1.2.16 Object.prototype
+  // 19.1.2.17 Object.seal ( O )
+
+  // 19.1.2.18 Object.setPrototypeOf ( O, proto )
+  define(
+    Object, 'setPrototypeOf',
+    function setPrototypeOf(o, proto) {
+      if (Type(o) !== 'object') throw TypeError();
+      if (Type(proto) !== 'object' && Type(proto) !== 'null') throw TypeError();
+      o.__proto__ = proto;
+      return o;
+    }
+  );
+
+  // 19.1.3 Properties of the Object Prototype Object
+  // 19.1.3.1 Object.prototype.constructor
+  // 19.1.3.2 Object.prototype.hasOwnProperty ( V )
+  // 19.1.3.3 Object.prototype.isPrototypeOf ( V )
+  // 19.1.3.4 Object.prototype.propertyIsEnumerable ( V )
+  // 19.1.3.5 Object.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
+  // 19.1.3.6 Object.prototype.toString ( )
+  hook(Object.prototype, 'toString',
+       function() {
+         var o = strict(this);
+         if (o === Object(o) && $$toStringTag in o) {
+           return '[object ' + o[$$toStringTag] + ']';
+         }
+         return undefined;
+       });
+
+  // 19.1.3.7 Object.prototype.valueOf ( )
+  // 19.1.4 Properties of Object Instances
+
+  // ---------------------------------------
+  // 19.2 Function Objects
+  // ---------------------------------------
+
+  // 19.2.1 The Function Constructor
+  // 19.2.1.1 Function ( p1, p2, … , pn, body )
+  // 19.2.2 Properties of the Function Constructor
+  // 19.2.2.1 Function.length
+  // 19.2.2.2 Function.prototype
+  // 19.2.3 Properties of the Function Prototype Object
+  // 19.2.3.1 Function.prototype.apply ( thisArg, argArray )
+  // 19.2.3.2 Function.prototype.bind ( thisArg , ...args)
+  // 19.2.3.3 Function.prototype.call (thisArg , ...args)
+  // 19.2.3.4 Function.prototype.constructor
+  // 19.2.3.5 Function.prototype.toString ( )
+  // 19.2.3.6 Function.prototype[@@hasInstance] ( V )
+  // 19.2.4 Function Instances
+  // 19.2.4.1 length
+  // 19.2.4.2 name
+  // 19.2.4.3 prototype
+
+  // (No polyfillable changes from ES5)
+
+  // ---------------------------------------
+  // 19.3 Boolean Objects
+  // ---------------------------------------
+
+  // 19.3.1 The Boolean Constructor
+  // 19.3.1.1 Boolean ( value )
+  // 19.3.2 Properties of the Boolean Constructor
+  // 19.3.2.1 Boolean.prototype
+  // 19.3.3 Properties of the Boolean Prototype Object
+  // 19.3.3.1 Boolean.prototype.constructor
+  // 19.3.3.2 Boolean.prototype.toString ( )
+  // 19.3.3.3 Boolean.prototype.valueOf ( )
+  // 19.3.4 Properties of Boolean Instances
+
+  // (No polyfillable changes from ES5)
+
+  // ---------------------------------------
+  // 19.4 Symbol Objects
+  // ---------------------------------------
+
+  // Moved earlier in this script, so that other polyfills can depend on them.
+
+  // 19.4.3.4 Symbol.prototype [ @@toStringTag ]
+  define(global.Symbol.prototype, global.Symbol.toStringTag, 'Symbol');
+
+  // ---------------------------------------
+  // 19.5 Error Objects
+  // ---------------------------------------
+
+  // 19.5.1 The Error Constructor
+  // 19.5.1.1 Error ( message )
+  // 19.5.1.2 new Error( ...argumentsList )
+  // 19.5.2 Properties of the Error Constructor
+  // 19.5.2.1 Error.prototype
+  // 19.5.3 Properties of the Error Prototype Object
+  // 19.5.3.1 Error.prototype.constructor
+  // 19.5.3.2 Error.prototype.message
+  // 19.5.3.3 Error.prototype.name
+  // 19.5.3.4 Error.prototype.toString ( )
+  // 19.5.4 Properties of Error Instances
+  // 19.5.5 Native Error Types Used in This Standard
+  // 19.5.5.1 EvalError
+  // 19.5.5.2 RangeError
+  // 19.5.5.3 ReferenceError
+  // 19.5.5.4 SyntaxError
+  // 19.5.5.5 TypeError
+  // 19.5.5.6 URIError
+  // 19.5.6 NativeError Object Structure
+  // 19.5.6.1 NativeError Constructors
+  // 19.5.6.1.1 NativeError ( message )
+  // 19.5.6.1.2 new NativeError ( ...argumentsList )
+  // 19.5.6.2 Properties of the NativeError Constructors
+  // 19.5.6.2.1 NativeError.prototype
+  // 19.5.6.3 Properties of the NativeError Prototype Objects
+  // 19.5.6.4 Properties of NativeError Instances
+
+  // (No polyfillable changes from ES5)
+
+  // ---------------------------------------
+  // 20 Numbers and Dates
+  // ---------------------------------------
+
+  // ---------------------------------------
+  // 20.1 Number Objects
+  // ---------------------------------------
+
+  // 20.1.1 The Number Constructor
+  // 20.1.1.1 Number ( [ value ] )
+  // 20.1.1.2 new Number ( ...argumentsList )
+  // 20.1.2 Properties of the Number Constructor
+
+  // 20.1.2.1 Number.EPSILON
+  define(
+    Number, 'EPSILON',
+    (function () {
+      var next, result;
+      for (next = 1; 1 + next !== 1; next = next / 2)
+        result = next;
+      return result;
+    }()));
+
+  // 20.1.2.2 Number.isFinite ( number )
+  define(
+    Number, 'isFinite',
+    function isFinite(number) {
+      if (Type(number) !== 'number') return false;
+      if (number !== number || number === +Infinity || number === -Infinity) return false;
+      return true;
+    });
+
+  // 20.1.2.3 Number.isInteger ( number )
+  define(
+    Number, 'isInteger',
+    function isInteger(number) {
+      if (Type(number) !== 'number') return false;
+      if (number !== number || number === +Infinity || number === -Infinity) return false;
+      var integer = ToInteger(number);
+      if (integer !== number) return false;
+      return true;
+    });
+
+  // 20.1.2.4 Number.isNaN ( number )
+  define(
+    Number, 'isNaN',
+    function isNaN(number) {
+      if (Type(number) !== 'number') return false;
+      if (number !== number) return true;
+      return false;
+    });
+
+  // 20.1.2.5 Number.isSafeInteger ( number )
+  define(
+    Number, 'isSafeInteger',
+    function isSafeInteger(number) {
+      if (Type(number) !== 'number') return false;
+      if (number !== number || number === +Infinity || number === -Infinity) return false;
+      var integer = ToInteger(number);
+      if (integer !== number) return false;
+      if (abs(integer) <= (0x20000000000000 - 1)) // 2^53-1
+        return true;
+      return false;
+    });
+
+  // 20.1.2.6 Number.MAX_SAFE_INTEGER
+  define(
+    Number, 'MAX_SAFE_INTEGER',
+    9007199254740991); // 2^53-1
+
+  // 20.1.2.7 Number.MAX_VALUE
+
+  // 20.1.2.8 Number.MIN_SAFE_INTEGER
+  define(
+    Number, 'MIN_SAFE_INTEGER',
+    -9007199254740991); // -2^53+1
+
+  // 20.1.2.9 Number.MIN_VALUE
+  // 20.1.2.10 Number.NaN
+  // 20.1.2.11 Number.NEGATIVE_INFINITY
+
+  // 20.1.2.12 Number.parseFloat ( string )
+  define(Number, 'parseFloat', $parseFloat);
+
+  // 20.1.2.13 Number.parseInt ( string, radix )
+  define(Number, 'parseInt', $parseInt);
+
+  // 20.1.2.14 Number.POSITIVE_INFINITY
+  // 20.1.2.15 Number.prototype
+
+  // 20.1.3 Properties of the Number Prototype Object
+  // 20.1.3.1 Number.prototype.constructor
+  // 20.1.3.2 Number.prototype.toExponential ( fractionDigits )
+  // 20.1.3.3 Number.prototype.toFixed ( fractionDigits )
+  // 20.1.3.4 Number.prototype.toLocaleString( [ reserved1 [ , reserved2 ] ])
+  // 20.1.3.5 Number.prototype.toPrecision ( precision )
+  // 20.1.3.6 Number.prototype.toString ( [ radix ] )
+  // 20.1.3.7 Number.prototype.valueOf ( )
+  // 20.1.4 Properties of Number Instances
+
+  // ---------------------------------------
+  // 20.2 The Math Object
+  // ---------------------------------------
+
+  // 20.2.1 Value Properties of the Math Object
+  // 20.2.1.1 Math.E
+  // 20.2.1.2 Math.LN10
+  // 20.2.1.3 Math.LN2
+  // 20.2.1.4 Math.LOG10E
+  // 20.2.1.5 Math.LOG2E
+  // 20.2.1.6 Math.PI
+  // 20.2.1.7 Math.SQRT1_2
+  // 20.2.1.8 Math.SQRT2
+
+  // 20.2.1.9 Math [ @@toStringTag ]
+  define(Math, $$toStringTag, 'Math');
+
+  // 20.2.2 Function Properties of the Math Object
+  // 20.2.2.1 Math.abs ( x )
+  // 20.2.2.2 Math.acos ( x )
+
+  // 20.2.2.3 Math.acosh(x)
+  define(
+    Math, 'acosh',
+    function acosh(x) {
+      x = Number(x);
+      return log(x + sqrt(x * x - 1));
+    });
+
+  // 20.2.2.4 Math.asin ( x )
+
+  // 20.2.2.5 Math.asinh( x )
+  define(
+    Math, 'asinh',
+    function asinh(x) {
+      x = Number(x);
+      if (SameValue(x, -0)) {
+        return x;
+      }
+      var s = sqrt(x * x + 1);
+      return (s === -x) ? log(0) : log(x + s);
+    });
+
+  // 20.2.2.6 Math.atan ( x )
+
+  // 20.2.2.7 Math.atanh( x )
+  define(
+    Math, 'atanh',
+    function atanh(x) {
+      x = Number(x);
+      return (x === 0) ? x : log((1 + x) / (1 - x)) / 2;
+    });
+
+  // 20.2.2.8 Math.atan2 ( y, x )
+
+  // 20.2.2.9 Math.cbrt ( x )
+  define(
+    Math, 'cbrt',
+    function cbrt(x) {
+      x = Number(x);
+      if ($isNaN(x/x)) {
+        return x;
+      }
+      var r = pow(abs(x), 1/3);
+      var t = x/r/r;
+      return r + (r * (t-r) / (2*r + t));
+    });
+
+  // 20.2.2.10 Math.ceil ( x )
+
+  // 20.2.2.11 Math.clz32 ( x )
+  define(
+    Math, 'clz32',
+    function clz32(x) {
+      function clz8(x) {
+        return (x & 0xf0) ? (x & 0x80 ? 0 : x & 0x40 ? 1 : x & 0x20 ? 2 : 3) :
+        (x & 0x08 ? 4 : x & 0x04 ? 5 : x & 0x02 ? 6 : x & 0x01 ? 7 : 8);
+      }
+      x = ToUint32(x);
+      return x & 0xff000000 ? clz8(x >> 24) :
+        x & 0xff0000 ? clz8(x >> 16) + 8 :
+        x & 0xff00 ? clz8(x >> 8) + 16 : clz8(x) + 24;
+    });
+
+
+
+  // 20.2.2.12 Math.cos ( x )
+
+  // 20.2.2.13 Math.cosh ( x )
+  define(
+    Math, 'cosh',
+    function cosh(x) {
+      x = Number(x);
+      return (pow(E, x) + pow(E, -x)) / 2;
+    });
+
+  // 20.2.2.14 Math.exp ( x )
+
+  // 20.2.2.15 Math.expm1 ( x )
+  define(
+    Math, 'expm1',
+    function expm1(x) {
+      x = Number(x);
+      // from: http://www.johndcook.com/cpp_log1p.html
+      if (SameValue(x, -0)) {
+        return -0;
+      } else if (abs(x) < 1e-5) {
+        return x + 0.5 * x * x; // two terms of Taylor expansion
+      } else {
+        return exp(x) - 1;
+      }
+    });
+
+  // 20.2.2.16 Math.floor ( x )
+
+  // 20.2.2.17 Math.fround ( x )
+  define(
+    Math, 'fround',
+    function fround(x) {
+      if ($isNaN(x)) {
+        return NaN;
+      }
+      if (1/x === +Infinity || 1/x === -Infinity || x === +Infinity || x === -Infinity) {
+        return x;
+      }
+      return (new Float32Array([x]))[0];
+    });
+
+  // 20.2.2.18 Math.hypot ( value1 [, value2 [ ... ] ] )
+  define(
+    Math, 'hypot',
+    function hypot() {
+      var values = [];
+      var m = 0, sawNaN = false;
+      for (var i = 0; i < arguments.length; ++i) {
+        var n = abs(Number(arguments[i]));
+        if (n === Infinity) return n;
+        if (n !== n) sawNaN = true;
+        if (n > m) m = n;
+        values[i] = n;
+      }
+      if (sawNaN) return NaN;
+      if (m === 0) return +0;
+      var sum = +0;
+      for (i = 0; i < values.length; ++i) {
+        var r = values[i] / m;
+        sum = sum + r * r;
+      }
+      return m * sqrt(sum);
+    });
+
+  // 20.2.2.19 Math.imul ( x, y )
+  define(
+    Math, 'imul',
+    function imul(x, y) {
+      var a = ToUint32(x);
+      var b = ToUint32(y);
+      // (slow but accurate)
+      var ah  = (a >>> 16) & 0xffff;
+      var al = a & 0xffff;
+      var bh  = (b >>> 16) & 0xffff;
+      var bl = b & 0xffff;
+      return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0)|0);
+    }, ('imul' in Math && Math.imul(1, 0x80000000) === 0) // Safari 7 bug
+  );
+
+  // 20.2.2.20 Math.log ( x )
+
+  // 20.2.2.21 Math.log1p ( x )
+  define(
+    Math, 'log1p',
+    function log1p(x) {
+      x = Number(x);
+      // from: http://www.johndcook.com/cpp_expm1.html
+      if (x < -1) {
+        return NaN;
+      } else if (SameValue(x, -0)) {
+        return -0;
+      } else if (abs(x) > 1e-4) {
+        return log(1 + x);
+      } else {
+        return (-0.5 * x + 1) * x;
+      }
+    });
+
+  // 20.2.2.22 Math.log10 ( x )
+  define(
+    Math, 'log10',
+    function log10(x) {
+      x = Number(x);
+      return log(x) * LOG10E;
+    });
+
+  // 20.2.2.23 Math.log2 ( x )
+  define(
+    Math, 'log2',
+    function log2(x) {
+      x = Number(x);
+      return log(x) * LOG2E;
+    });
+
+  // 20.2.2.24 Math.max ( value1, value2 , ...values )
+  // 20.2.2.25 Math.min ( value1, value2 , ...values )
+  // 20.2.2.26 Math.pow ( x, y )
+  // 20.2.2.27 Math.random ( )
+  // 20.2.2.28 Math.round ( x )
+
+  // 20.2.2.29 Math.sign(x)
+  define(
+    Math, 'sign',
+    function sign(x) {
+      x = Number(x);
+      return x < 0 ? -1 : x > 0 ? 1 : x;
+    });
+
+  // 20.2.2.30 Math.sin ( x )
+
+  // 20.2.2.31 Math.sinh( x )
+  define(
+    Math, 'sinh',
+    function sinh(x) {
+      x = Number(x);
+      return SameValue(x, -0) ? x : (pow(E, x) - pow(E, -x)) / 2;
+    });
+
+  // 20.2.2.32 Math.sqrt ( x )
+  // 20.2.2.33 Math.tan ( x )
+
+  // 20.2.2.34 Math.tanh ( x )
+  define(
+    Math, 'tanh',
+    function tanh(x) {
+      x = Number(x);
+      var n = pow(E, 2 * x) - 1,
+          d = pow(E, 2 * x) + 1;
+      if (SameValue(x, -0))
+        return x;
+      return (n === d) ? 1 : n / d; // Handle Infinity/Infinity
+    });
+
+  // 20.2.2.35 Math.trunc ( x )
+  define(
+    Math, 'trunc',
+    function trunc(x) {
+      x = Number(x);
+      return $isNaN(x) ? NaN :
+        x < 0 ? ceil(x) : floor(x);
+    });
+
+  // ---------------------------------------
+  // 20.3 Date Objects
+  // ---------------------------------------
+
+  // 20.3.1 Overview of Date Objects and Definitions of Abstract Operations
+  // 20.3.1.1 Time Values and Time Range
+  // 20.3.1.2 Day Number and Time within Day
+  // 20.3.1.3 Year Number
+  // 20.3.1.4 Month Number
+  // 20.3.1.5 Date Number
+  // 20.3.1.6 Week Day
+  // 20.3.1.7 Local Time Zone Adjustment
+  // 20.3.1.8 Daylight Saving Time Adjustment
+  // 20.3.1.9 Local Time
+  // 20.3.1.10 Hours, Minutes, Second, and Milliseconds
+  // 20.3.1.11 MakeTime (hour, min, sec, ms)
+  // 20.3.1.12 MakeDay (year, month, date)
+  // 20.3.1.13 MakeDate (day, time)
+  // 20.3.1.14 TimeClip (time)
+  // 20.3.1.15 Date Time String Format
+  // 20.3.1.15.1 Extended years
+  // 20.3.2 The Date Constructor
+  // 20.3.2.1 Date ( year, month [, date [ , hours [ , minutes [ , seconds [ , ms ] ] ] ] ] )
+  // 20.3.2.2 Date ( value )
+  // 20.3.2.3 Date ( )
+  // 20.3.3 Properties of the Date Constructor
+  // 20.3.3.1 Date.now ( )
+  // 20.3.3.2 Date.parse (string)
+  // 20.3.3.3 Date.prototype
+  // 20.3.3.4 Date.UTC ( year, month [ , date [ , hours [ , minutes [ , seconds [ , ms ] ] ] ] ] )
+  // 20.3.4 Properties of the Date Prototype Object
+  // 20.3.4.1 Date.prototype.constructor
+  // 20.3.4.2 Date.prototype.getDate ( )
+  // 20.3.4.3 Date.prototype.getDay ( )
+  // 20.3.4.4 Date.prototype.getFullYear ( )
+  // 20.3.4.5 Date.prototype.getHours ( )
+  // 20.3.4.6 Date.prototype.getMilliseconds ( )
+  // 20.3.4.7 Date.prototype.getMinutes ( )
+  // 20.3.4.8 Date.prototype.getMonth ( )
+  // 20.3.4.9 Date.prototype.getSeconds ( )
+  // 20.3.4.10 Date.prototype.getTime ( )
+  // 20.3.4.11 Date.prototype.getTimezoneOffset ( )
+  // 20.3.4.12 Date.prototype.getUTCDate ( )
+  // 20.3.4.13 Date.prototype.getUTCDay ( )
+  // 20.3.4.14 Date.prototype.getUTCFullYear ( )
+  // 20.3.4.15 Date.prototype.getUTCHours ( )
+  // 20.3.4.16 Date.prototype.getUTCMilliseconds ( )
+  // 20.3.4.17 Date.prototype.getUTCMinutes ( )
+  // 20.3.4.18 Date.prototype.getUTCMonth ( )
+  // 20.3.4.19 Date.prototype.getUTCSeconds ( )
+  // 20.3.4.20 Date.prototype.setDate ( date )
+  // 20.3.4.21 Date.prototype.setFullYear ( year [ , month [ , date ] ] )
+  // 20.3.4.22 Date.prototype.setHours ( hour [ , min [ , sec [ , ms ] ] ] )
+  // 20.3.4.23 Date.prototype.setMilliseconds ( ms )
+  // 20.3.4.24 Date.prototype.setMinutes ( min [ , sec [ , ms ] ] )
+  // 20.3.4.25 Date.prototype.setMonth ( month [ , date ] )
+  // 20.3.4.26 Date.prototype.setSeconds ( sec [ , ms ] )
+  // 20.3.4.27 Date.prototype.setTime ( time )
+  // 20.3.4.28 Date.prototype.setUTCDate ( date )
+  // 20.3.4.29 Date.prototype.setUTCFullYear ( year [ , month [ , date ] ] )
+  // 20.3.4.30 Date.prototype.setUTCHours ( hour [ , min [ , sec [ , ms ] ] ] )
+  // 20.3.4.31 Date.prototype.setUTCMilliseconds ( ms )
+  // 20.3.4.32 Date.prototype.setUTCMinutes ( min [ , sec [, ms ] ] )
+  // 20.3.4.33 Date.prototype.setUTCMonth ( month [ , date ] )
+  // 20.3.4.34 Date.prototype.setUTCSeconds ( sec [ , ms ] )
+  // 20.3.4.35 Date.prototype.toDateString ( )
+  // 20.3.4.36 Date.prototype.toISOString ( )
+  // 20.3.4.37 Date.prototype.toJSON ( key )
+  // 20.3.4.38 Date.prototype.toLocaleDateString ( [ reserved1 [ , reserved2 ] ] )
+  // 20.3.4.39 Date.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
+  // 20.3.4.40 Date.prototype.toLocaleTimeString ( [ reserved1 [ , reserved2 ] ] )
+  // 20.3.4.41 Date.prototype.toString ( )
+  // 20.3.4.42 Date.prototype.toTimeString ( )
+  // 20.3.4.43 Date.prototype.toUTCString ( )
+  // 20.3.4.44 Date.prototype.valueOf ( )
+  // 20.3.4.45 Date.prototype [ @@toPrimitive ] ( hint )
+  // 20.3.5 Properties of Date Instances
+
+  // (No polyfillable changes from ES5)
+
+  // ---------------------------------------
+  // 21 Text Processing
+  // ---------------------------------------
+
+  var string_regexp_dispatch = (function() {
+    var faux = {}, secret = Symbol();
+    faux[Symbol.match] = function() { return secret; };
+    return ("").match(faux) === secret;
+  }());
+
+  // 21.1 String Objects
+  // 21.1.1 The String Constructor
+  // 21.1.1.1 String ( value )
+  // 21.1.2 Properties of the String Constructor
+  // 21.1.2.1 String.fromCharCode ( ...codeUnits )
+
+  // 21.1.2.2 String.fromCodePoint ( ...codePoints )
+  define(
+    String, 'fromCodePoint',
+    function fromCodePoint(/*...codePoints*/) {
+      var codePoints = arguments,
+          length = codePoints.length,
+          elements = [],
+          nextIndex = 0;
+      while (nextIndex < length) {
+        var next = codePoints[nextIndex];
+        var nextCP = Number(next);
+        if (!SameValue(nextCP, ToInteger(nextCP)) ||
+            nextCP < 0 || nextCP > 0x10FFFF) {
+          throw RangeError('Invalid code point ' + nextCP);
+        }
+        if (nextCP < 0x10000) {
+          elements.push(String.fromCharCode(nextCP));
+        } else {
+          nextCP -= 0x10000;
+          elements.push(String.fromCharCode((nextCP >> 10) + 0xD800));
+          elements.push(String.fromCharCode((nextCP % 0x400) + 0xDC00));
+        }
+        nextIndex += 1;
+      }
+      return elements.join('');
+    });
+
+  // 21.1.2.3 String.prototype
+
+  // 21.1.2.4 String.raw ( template , ...substitutions )
+  define(
+    String, 'raw',
+    function raw(template /*, ...substitutions*/) {
+      var substitutions = [].slice.call(arguments, 1);
+
+      var cooked = Object(template);
+      var rawValue = cooked['raw'];
+      var raw = Object(rawValue);
+      var len = raw['length'];
+      var literalSegments = ToLength(len);
+      if (literalSegments <= 0) return '';
+      var stringElements = [];
+      var nextIndex = 0;
+      while (true) {
+        var next = raw[nextIndex];
+        var nextSeg = String(next);
+        stringElements.push(nextSeg);
+        if (nextIndex + 1 === literalSegments)
+          return stringElements.join('');
+        next = substitutions[nextIndex];
+        var nextSub = String(next);
+        stringElements.push(nextSub);
+        nextIndex = nextIndex + 1;
+      }
+    });
+
+  // See https://githib.com/inexorabletash/uate for a more useful version.
+
+  // 21.1.3 Properties of the String Prototype Object
+  // 21.1.3.1 String.prototype.charAt ( pos )
+  // 21.1.3.2 String.prototype.charCodeAt ( pos )
+
+  // 21.1.3.3 String.prototype.codePointAt ( pos )
+  define(
+    String.prototype, 'codePointAt',
+    function codePointAt(pos) {
+      var o = strict(this);
+      var s = String(o);
+      var position = ToInteger(pos);
+      var size = s.length;
+      if (position < 0 || position >= size) return undefined;
+      var first = s.charCodeAt(position);
+      if (first < 0xD800 || first > 0xDBFF || position + 1 === size) return first;
+      var second = s.charCodeAt(position + 1);
+      if (second < 0xDC00 || second > 0xDFFF) return first;
+      return ((first - 0xD800) * 1024) + (second - 0xDC00) + 0x10000;
+    });
+
+  // 21.1.3.4 String.prototype.concat ( ...args )
+  // 21.1.3.5 String.prototype.constructor
+
+  // 21.1.3.6 String.prototype.endsWith ( searchString [ , endPosition] )
+  define(
+    String.prototype, 'endsWith',
+    function endsWith(searchString) {
+      var endPosition = arguments[1];
+
+      var o = strict(this);
+      var s = String(o);
+      var searchStr = String(searchString);
+      var len = s.length;
+      var pos = (endPosition === undefined) ? len : ToInteger(endPosition);
+      var end = min(max(pos, 0), len);
+      var searchLength = searchStr.length;
+      var start = end - searchLength;
+      if (start < 0) return false;
+      if (s.substring(start, start + searchLength) === searchStr) return true;
+      return false;
+    });
+
+  // 21.1.3.7 String.prototype.includes ( searchString [ , position ] )
+  define(
+    String.prototype, 'includes',
+    function includes(searchString) {
+      var position = arguments[1];
+
+      var o = strict(this);
+      var s = String(o);
+      var searchStr = String(searchString);
+      var pos = ToInteger(position);
+      var len = s.length;
+      var start = min(max(pos, 0), len);
+      return s.indexOf(searchStr, start) !== -1;
+    });
+
+  // 21.1.3.8 String.prototype.indexOf ( searchString [ , position ] )
+  // 21.1.3.9 String.prototype.lastIndexOf ( searchString [ , position ] )
+  // 21.1.3.10 String.prototype.localeCompare ( that [, reserved1 [ , reserved2 ] ] )
+  // 21.1.3.11 String.prototype.match ( regexp )
+  define(
+    String.prototype, 'match',
+    function match(regexp) {
+      var o = strict(this);
+      var s = String(o);
+      if (HasProperty(regexp, $$match)) var rx = regexp;
+      else rx = new RegExp(regexp);
+      return rx[$$match](s);
+    }, !string_regexp_dispatch);
+
+  // 21.1.3.12 String.prototype.normalize ( [ form ] )
+
+  // Not practical due to table sizes; if needed, pull in:
+  // https://github.com/walling/unorm/
+
+  // 21.1.3.13 String.prototype.repeat ( count )
+  define(
+    String.prototype, 'repeat',
+    function repeat(count) {
+      var o = strict(this);
+      var s = String(o);
+      var n = ToInteger(count);
+      if (n < 0) throw RangeError();
+      if (n === Infinity) throw RangeError();
+      var t = new Array(n + 1).join(s);
+      return t;
+    });
+
+  // 21.1.3.14 String.prototype.replace (searchValue, replaceValue )
+  define(
+    String.prototype, 'replace',
+    function replace(searchValue, replaceValue) {
+      var o = strict(this);
+      if (HasProperty(searchValue, $$replace))
+        return searchValue[$$replace](o, replaceValue);
+      return orig_replace.call(o, searchValue, replaceValue);
+    }, !string_regexp_dispatch);
+
+  // 21.1.3.15 String.prototype.search ( regexp )
+  define(
+    String.prototype, 'search',
+    function search(regexp) {
+      var o = strict(this);
+      var string = String(o);
+      if (HasProperty(regexp, $$search)) var rx = regexp;
+      else rx = new RegExp(regexp);
+      return rx[$$search](string);
+    }, !string_regexp_dispatch);
+
+  // 21.1.3.16 String.prototype.slice ( start, end )
+  // 21.1.3.17 String.prototype.split ( separator, limit )
+  define(
+    String.prototype, 'split',
+    function split(separator, limit) {
+      var o = strict(this);
+      if (HasProperty(separator, $$split))
+        return separator[$$split](o, limit);
+      return orig_split.call(o, separator, limit);
+    }, !string_regexp_dispatch);
+
+  // 21.1.3.18 String.prototype.startsWith ( searchString [, position ] )
+  define(
+    String.prototype, 'startsWith',
+    function startsWith(searchString) {
+      var position = arguments[1];
+
+      var o = strict(this);
+      var s = String(o);
+      var searchStr = String(searchString);
+      var pos = ToInteger(position);
+      var len = s.length;
+      var start = min(max(pos, 0), len);
+      var searchLength = searchStr.length;
+      if (searchLength + start > len) return false;
+      if (s.substring(start, start + searchLength) === searchStr) return true;
+      return false;
+    });
+
+  // 21.1.3.19 String.prototype.substring ( start, end )
+  // 21.1.3.20 String.prototype.toLocaleLowerCase ( [ reserved1 [ , reserved2 ] ] )
+  // 21.1.3.21 String.prototype.toLocaleUpperCase ([ reserved1 [ , reserved2 ] ] )
+  // 21.1.3.22 String.prototype.toLowerCase ( )
+  // 21.1.3.23 String.prototype.toString ( )
+  // 21.1.3.24 String.prototype.toUpperCase ( )
+  // 21.1.3.25 String.prototype.trim ( )
+  // 21.1.3.26 String.prototype.valueOf ( )
+
+  // 21.1.3.27 String.prototype [ @@iterator ]( )
+  define(
+    String.prototype, $$iterator,
+    function entries() {
+      return CreateStringIterator(this, 'value');
+    });
+
+  // 21.1.4 Properties of String Instances
+  // 21.1.4.1 length
+
+  // 21.1.5 String Iterator Objects
+  /** @constructor */
+  function StringIterator() {}
+
+  // 21.1.5.1 CreateStringIterator Abstract Operation
+  function CreateStringIterator(string, kind) {
+    var s = String(string);
+    var iterator = new StringIterator;
+    set_internal(iterator, '[[IteratedString]]', s);
+    set_internal(iterator, '[[StringIteratorNextIndex]]', 0);
+    set_internal(iterator, '[[StringIterationKind]]', kind);
+    return iterator;
+  }
+
+  // 21.1.5.2 The %StringIteratorPrototype% Object
+  var $StringIteratorPrototype$ = Object.create($IteratorPrototype$);
+  StringIterator.prototype = $StringIteratorPrototype$;
+
+  // 21.1.5.2.1 %StringIteratorPrototype%.next ( )
+  define(
+    $StringIteratorPrototype$, 'next',
+    function next() {
+      var o = ToObject(this);
+      var s = String(o['[[IteratedString]]']),
+          index = o['[[StringIteratorNextIndex]]'],
+          len = s.length;
+      if (index >= len) {
+        set_internal(o, '[[StringIteratorNextIndex]]', Infinity);
+        return CreateIterResultObject(undefined, true);
+      }
+      var cp = s.codePointAt(index);
+      set_internal(o, '[[StringIteratorNextIndex]]', index + (cp > 0xFFFF ? 2 : 1));
+      return CreateIterResultObject(String.fromCodePoint(cp), false);
+    });
+
+  // 21.1.5.2.2 %StringIteratorPrototype% [ @@toStringTag ]
+  define($StringIteratorPrototype$, $$toStringTag, 'String Iterator');
+
+  // 21.1.5.3 Properties of String Iterator Instances
+
+  // ---------------------------------------
+  // 21.2 RegExp (Regular Expression) Objects
+  // ---------------------------------------
+
+  // 21.2.1 Patterns
+  // 21.2.2 Pattern Semantics
+  // 21.2.2.1 Notation
+  // 21.2.2.2 Pattern
+  // 21.2.2.3 Disjunction
+  // 21.2.2.4 Alternative
+  // 21.2.2.5 Term
+  // 21.2.2.6 Assertion
+  // 21.2.2.7 Quantifier
+  // 21.2.2.8 Atom
+  // 21.2.2.9 AtomEscape
+  // 21.2.2.10 CharacterEscape
+  // 21.2.2.11 DecimalEscape
+  // 21.2.2.12 CharacterClassEscape
+  // 21.2.2.13 CharacterClass
+  // 21.2.2.14 ClassRanges
+  // 21.2.2.15 NonemptyClassRanges
+  // 21.2.2.16 NonemptyClassRangesNoDash
+  // 21.2.2.17 ClassAtom
+  // 21.2.2.18 ClassAtomNoDash
+  // 21.2.2.19 ClassEscape
+  // 21.2.3 The RegExp Constructor
+  // 21.2.3.1 RegExp ( pattern, flags )
+  // 21.2.3.2 new RegExp( ...argumentsList )
+  // 21.2.3.3 Abstract Operations for the RegExp Constructor
+  // 21.2.4 Properties of the RegExp Constructor
+  // 21.2.4.1 RegExp.prototype
+  // 21.2.5 Properties of the RegExp Prototype Object
+  // 21.2.5.1 RegExp.prototype.constructor
+  // 21.2.5.2 RegExp.prototype.exec ( string )
+
+  // 21.2.5.3 get RegExp.prototype.flags
+  if (!('flags' in RegExp.prototype)) {
+    Object.defineProperty(
+      RegExp.prototype, 'flags', {
+        get: function() {
+          var s = String(this);
+          return s.substring(s.lastIndexOf('/') + 1);
+        }
+      });
+  }
+
+  // 21.2.5.4 get RegExp.prototype.global
+  // 21.2.5.5 get RegExp.prototype.ignoreCase
+
+  // 21.2.5.6 RegExp.prototype [ @@match ] ( string )
+  define(RegExp.prototype, $$match, function(string) {
+    var o = strict(this);
+    return orig_match.call(string, o);
+  });
+
+  // 21.2.5.7 get RegExp.prototype.multiline
+
+  // 21.2.5.8 RegExp.prototype [ @@replace ] ( string, replaceValue )
+  define(RegExp.prototype, $$replace, function(string, replaceValue) {
+    var o = strict(this);
+    return orig_replace.call(string, o, replaceValue);
+  });
+
+  // 21.2.5.9 RegExp.prototype [ @@search ] ( string )
+  define(RegExp.prototype, $$search, function(string) {
+    var o = strict(this);
+    return orig_search.call(string, o);
+  });
+
+  // 21.2.5.10 get RegExp.prototype.source
+
+  // 21.2.5.11 RegExp.prototype [ @@split ] ( string, limit )
+  define(RegExp.prototype, $$split, function(string, limit) {
+    var o = strict(this);
+    return orig_split.call(string, o, limit);
+  });
+
+  // 21.2.5.12 get RegExp.prototype.sticky
+  // 21.2.5.13 RegExp.prototype.test( S )
+  // 21.2.5.14 RegExp.prototype.toString ( )
+  // 21.2.5.15 get RegExp.prototype.unicode
+
+  // 21.2.6 Properties of RegExp Instances
+  // 21.2.6.1 lastIndex
+
+  // (No polyfillable changes from ES5)
+
+  // ---------------------------------------
+  // 22 Indexed Collections
+  // ---------------------------------------
+
+  // ---------------------------------------
+  // 22.1 Array Objects
+  // ---------------------------------------
+
+  // 22.1.1 The Array Constructor
+  // 22.1.1.1 Array ( )
+  // 22.1.1.2 Array (len)
+  // 22.1.1.3 Array (...items )
+
+  // 22.1.2 Properties of the Array Constructor
+
+  // 22.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] )
+  define(
+    Array, 'from',
+    function from(items) {
+      var mapfn = arguments[1];
+      var thisArg = arguments[2];
+
+      var c = strict(this);
+      if (mapfn === undefined) {
+        var mapping = false;
+      } else {
+        if (!IsCallable(mapfn)) throw TypeError();
+        var t = thisArg;
+        mapping = true;
+      }
+      var usingIterator = GetMethod(items, $$iterator);
+      if (usingIterator !== undefined) {
+         if (IsConstructor(c)) {
+          var a = new c();
+        } else {
+          a = new Array(0);
+        }
+        var iterator = GetIterator(items, usingIterator);
+        var k = 0;
+        while (true) {
+          var next = IteratorStep(iterator);
+          if (next === false) {
+            a.length = k;
+            return a;
+          }
+          var nextValue = IteratorValue(next);
+          if (mapping)
+            var mappedValue = mapfn.call(t, nextValue);
+          else
+            mappedValue = nextValue;
+          a[k] = mappedValue;
+          k += 1;
+        }
+      }
+      var arrayLike = ToObject(items);
+      var lenValue = arrayLike.length;
+      var len = ToLength(lenValue);
+      if (IsConstructor(c)) {
+        a = new c(len);
+      } else {
+        a = new Array(len);
+      }
+      k = 0;
+      while (k < len) {
+        var kValue = arrayLike[k];
+        if (mapping)
+          mappedValue = mapfn.call(t, kValue, k);
+        else
+          mappedValue = kValue;
+        a[k] = mappedValue;
+        k += 1;
+      }
+      a.length = len;
+      return a;
+    });
+
+  // 22.1.2.2 Array.isArray ( arg )
+
+  // 22.1.2.3 Array.of ( ...items )
+  define(
+    Array, 'of',
+    function of() {
+      var items = arguments;
+
+      var lenValue = items.length;
+      var len = ToUint32(lenValue);
+      var c = strict(this), a;
+      if (IsConstructor(c)) {
+        a = new c(len);
+        a = ToObject(a);
+      } else {
+        a = new Array(len);
+      }
+      var k = 0;
+      while (k < len) {
+        a[k] = items[k];
+        k += 1;
+      }
+      a.length = len;
+      return a;
+    });
+
+  // 22.1.2.4 Array.prototype
+  // 22.1.2.5 get Array [ @@species ]
+  // 22.1.3 Properties of the Array Prototype Object
+  // 22.1.3.1 Array.prototype.concat ( ...arguments )
+  // 22.1.3.1.1 Runtime Semantics: IsConcatSpreadable ( O )
+  // 22.1.3.2 Array.prototype.constructor
+  // 22.1.3.3 Array.prototype.copyWithin (target, start [ , end ] )
+  define(
+    Array.prototype, 'copyWithin',
+    function copyWithin(target, start/*, end*/) {
+      var end = arguments[2];
+
+      var o = ToObject(this);
+      var lenVal = o.length;
+      var len = ToLength(lenVal);
+      len = max(len, 0);
+      var relativeTarget = ToInteger(target);
+      var to;
+      if (relativeTarget < 0)
+        to = max(len + relativeTarget, 0);
+      else
+        to = min(relativeTarget, len);
+      var relativeStart = ToInteger(start);
+      var from;
+      if (relativeStart < 0)
+        from = max(len + relativeStart, 0);
+      else
+        from = min(relativeStart, len);
+      var relativeEnd;
+      if (end === undefined)
+        relativeEnd = len;
+      else
+        relativeEnd = ToInteger(end);
+      var final;
+      if (relativeEnd < 0)
+        final = max(len + relativeEnd, 0);
+      else
+        final = min(relativeEnd, len);
+      var count = min(final - from, len - to);
+      var direction;
+      if (from < to && to < from + count) {
+        direction = -1;
+        from = from + count - 1;
+        to = to + count - 1;
+      } else {
+        direction = 1;
+      }
+      while (count > 0) {
+        var fromKey = String(from);
+        var toKey = String(to);
+        var fromPresent = HasProperty(o, fromKey);
+        if (fromPresent) {
+          var fromVal = o[fromKey];
+          o[toKey] = fromVal;
+        } else {
+          delete o[toKey];
+        }
+        from = from + direction;
+        to = to + direction;
+        count = count - 1;
+      }
+      return o;
+    });
+
+  // 22.1.3.4 Array.prototype.entries ( )
+  var nativeArrayIteratorMethods =
+        ('entries' in Array.prototype && 'next' in [].entries());
+
+  define(
+    Array.prototype, 'entries',
+    function entries() {
+      return CreateArrayIterator(this, 'key+value');
+    }, !nativeArrayIteratorMethods);
+
+  // 22.1.3.5 Array.prototype.every ( callbackfn [ , thisArg] )
+
+  // 22.1.3.6 Array.prototype.fill (value [ , start [ , end ] ] )
+  define(
+    Array.prototype, 'fill',
+    function fill(value/*, start, end*/) {
+      var start = arguments[1],
+          end = arguments[2];
+
+      var o = ToObject(this);
+      var lenVal = o.length;
+      var len = ToLength(lenVal);
+      len = max(len, 0);
+      var relativeStart = ToInteger(start);
+      var k;
+      if (relativeStart < 0)
+        k = max((len + relativeStart), 0);
+      else
+        k = min(relativeStart, len);
+      var relativeEnd;
+      if (end === undefined)
+        relativeEnd = len;
+      else
+        relativeEnd = ToInteger(end);
+      var final;
+      if (relativeEnd < 0)
+        final = max((len + relativeEnd), 0);
+      else
+        final = min(relativeEnd, len);
+      while (k < final) {
+        var pk = String(k);
+        o[pk] = value;
+        k += 1;
+      }
+      return o;
+    });
+
+  // 22.1.3.7 Array.prototype.filter ( callbackfn [ , thisArg ] )
+
+  // 22.1.3.8 Array.prototype.find ( predicate [ , thisArg ] )
+  define(
+    Array.prototype, 'find',
+    function find(predicate) {
+      var o = ToObject(this);
+      var lenValue = o.length;
+      var len = ToInteger(lenValue);
+      if (!IsCallable(predicate)) throw TypeError();
+      var t = arguments.length > 1 ? arguments[1] : undefined;
+      var k = 0;
+      while (k < len) {
+        var pk = String(k);
+        var kPresent = HasProperty(o, pk);
+        if (kPresent) {
+          var kValue = o[pk];
+          var testResult = predicate.call(t, kValue, k, o);
+          if (Boolean(testResult)) {
+            return kValue;
+          }
+        }
+        ++k;
+      }
+      return undefined;
+    });
+
+  // 22.1.3.9 Array.prototype.findIndex ( predicate [ , thisArg ] )
+  define(
+    Array.prototype, 'findIndex',
+    function findIndex(predicate) {
+      var o = ToObject(this);
+      var lenValue = o.length;
+      var len = ToLength(lenValue);
+      if (!IsCallable(predicate)) throw TypeError();
+      var t = arguments.length > 1 ? arguments[1] : undefined;
+      var k = 0;
+      while (k < len) {
+        var pk = String(k);
+        var kPresent = HasProperty(o, pk);
+        if (kPresent) {
+          var kValue = o[pk];
+          var testResult = predicate.call(t, kValue, k, o);
+          if (Boolean(testResult)) {
+            return k;
+          }
+        }
+        ++k;
+      }
+      return -1;
+    });
+
+  // 22.1.3.10 Array.prototype.forEach ( callbackfn [ , thisArg ] )
+  // 22.1.3.11 Array.prototype.indexOf ( searchElement [ , fromIndex ] )
+  // 22.1.3.12 Array.prototype.join (separator)
+
+  // 22.1.3.13 Array.prototype.keys ( )
+  define(
+    Array.prototype, 'keys',
+    function keys() {
+      return CreateArrayIterator(this, 'key');
+    }, !nativeArrayIteratorMethods);
+
+  // 22.1.3.14 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+  // 22.1.3.15 Array.prototype.map ( callbackfn [ , thisArg ] )
+  // 22.1.3.16 Array.prototype.pop ( )
+  // 22.1.3.17 Array.prototype.push ( ...items )
+  // 22.1.3.18 Array.prototype.reduce ( callbackfn [ , initialValue ] )
+  // 22.1.3.19 Array.prototype.reduceRight ( callbackfn [ , initialValue ] )
+  // 22.1.3.20 Array.prototype.reverse ( )
+  // 22.1.3.21 Array.prototype.shift ( )
+  // 22.1.3.22 Array.prototype.slice (start, end)
+  // 22.1.3.23 Array.prototype.some ( callbackfn [ , thisArg ] )
+  // 22.1.3.24 Array.prototype.sort (comparefn)
+  // 22.1.3.25 Array.prototype.splice (start, deleteCount , ...items )
+  // 22.1.3.26 Array.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] )
+  // 22.1.3.27 Array.prototype.toString ( )
+  // 22.1.3.28 Array.prototype.unshift ( ...items )
+
+  // 22.1.3.29 Array.prototype.values ( )
+  define(
+    Array.prototype, 'values',
+    function values() {
+      return CreateArrayIterator(this, 'value');
+    }, !nativeArrayIteratorMethods);
+
+  // 22.1.3.30 Array.prototype [ @@iterator ] ( )
+  define(
+    Array.prototype, $$iterator,
+    Array.prototype.values
+    );
+
+  // 22.1.3.31 Array.prototype [ @@unscopables ]
+  // 22.1.4 Properties of Array Instances
+  // 22.1.4.1 length
+
+  // 22.1.5 Array Iterator Objects
+  function ArrayIterator() {}
+
+  // 22.1.5.1 CreateArrayIterator Abstract Operation
+  function CreateArrayIterator(array, kind) {
+    var o = ToObject(array);
+    var iterator = new ArrayIterator;
+    set_internal(iterator, '[[IteratedObject]]', o);
+    set_internal(iterator, '[[ArrayIteratorNextIndex]]', 0);
+    set_internal(iterator, '[[ArrayIterationKind]]', kind);
+    return iterator;
+  }
+
+  // 22.1.5.2 The %ArrayIteratorPrototype% Object
+  var $ArrayIteratorPrototype$ = Object.create($IteratorPrototype$);
+  ArrayIterator.prototype = $ArrayIteratorPrototype$;
+
+  // 22.1.5.2.1 %ArrayIteratorPrototype%. next( )
+  define(
+    $ArrayIteratorPrototype$, 'next',
+    function next() {
+      var o = strict(this);
+      if (Type(o) !== 'object') throw TypeError();
+      var a = o['[[IteratedObject]]'],
+          index = o['[[ArrayIteratorNextIndex]]'],
+          itemKind = o['[[ArrayIterationKind]]'],
+          lenValue = a.length,
+          len = ToUint32(lenValue),
+          elementKey,
+          elementValue;
+      if (itemKind.indexOf('sparse') !== -1) {
+        var found = false;
+        while (!found && index < len) {
+          elementKey = String(index);
+          found = HasProperty(a, elementKey);
+          if (!found) {
+            index += 1;
+          }
+        }
+      }
+      if (index >= len) {
+        set_internal(o, '[[ArrayIteratorNextIndex]]', Infinity);
+        return CreateIterResultObject(undefined, true);
+      }
+      elementKey = index;
+      set_internal(o, '[[ArrayIteratorNextIndex]]', index + 1);
+      if (itemKind.indexOf('value') !== -1)
+        elementValue = a[elementKey];
+      if (itemKind.indexOf('key+value') !== -1)
+        return CreateIterResultObject([elementKey, elementValue], false);
+      if (itemKind.indexOf('key') !== -1)
+        return CreateIterResultObject(elementKey, false);
+      if (itemKind === 'value')
+        return CreateIterResultObject(elementValue, false);
+      throw Error('Internal error');
+    });
+
+  // 22.1.5.2.2 %ArrayIteratorPrototype% [ @@toStringTag ]
+  define($ArrayIteratorPrototype$, $$toStringTag, 'Array Iterator');
+
+  // 22.1.5.3 Properties of Array Iterator Instances
+
+
+  // ---------------------------------------
+  // 22.2 TypedArray Objects
+  // ---------------------------------------
+
+  // See typedarray.js for TypedArray polyfill
+
+  ['Int8Array', 'Uint8Array', 'Uint8ClampedArray',
+   'Int16Array', 'Uint16Array',
+   'Int32Array', 'Uint32Array',
+   'Float32Array', 'Float64Array'].forEach(function ($TypedArrayName$) {
+     if (!($TypedArrayName$ in global))
+       return;
+     var $TypedArray$ = global[$TypedArrayName$];
+
+     // 22.2.1 The %TypedArray% Intrinsic Object
+     // 22.2.1.1 %TypedArray% ( length )
+     // 22.2.1.2 %TypedArray% ( typedArray )
+     // 22.2.1.3 %TypedArray% ( object )
+     // 22.2.1.4 %TypedArray% ( buffer [ , byteOffset [ , length ] ] )
+     // 22.2.1.5 %TypedArray% ( all other argument combinations )
+     // 22.2.2 Properties of the %TypedArray% Intrinsic Object
+
+     // 22.2.2.1 %TypedArray%.from ( source [ , mapfn [ , thisArg ] ] )
+     define(
+       $TypedArray$, 'from',
+       function from(source) {
+         var mapfn = arguments[1];
+         var thisArg = arguments[2];
+
+         var c = strict(this);
+         if (!IsConstructor(c)) throw TypeError();
+         if (mapfn === undefined) {
+           var mapping = false;
+         } else {
+           if (IsCallable(mapfn)) throw TypeError();
+           var t = thisArg;
+           mapping = true;
+         }
+         var usingIterator = GetMethod(source, $$iterator);
+         if (usingIterator !== undefined) {
+           var iterator = GetIterator(source, usingIterator);
+           var values = [];
+           var next = true;
+           while (next !== false) {
+             next = IteratorStep(iterator);
+             if (next !== false) {
+               var nextValue = IteratorValue(next);
+               values.push(nextValue);
+             }
+           }
+           var len = values.length;
+           var newObj = new c(len);
+           var k = 0;
+           while (k < len) {
+             var kValue = values.shift();
+             if (mapping) {
+               var mappedValue = mapfn.call(t, kValue);
+             } else {
+               mappedValue = kValue;
+             }
+             newObj[k] = mappedValue;
+             ++k;
+           }
+           console.assert(values.length === 0);
+           return newObj;
+         }
+         var arrayLike = ToObject(source);
+         var lenValue = arrayLike.length;
+         len = ToLength(lenValue);
+         newObj = new c(len);
+         k = 0;
+         while (k < len) {
+           kValue = arrayLike[k];
+           if (mapping) {
+             mappedValue = mapfn.call(t, kValue, k);
+           } else {
+             mappedValue = kValue;
+           }
+           newObj[k] = mappedValue;
+           ++k;
+         }
+         return newObj;
+       });
+
+     // 22.2.2.2 %TypedArray%.of ( ...items )
+     define(
+       $TypedArray$, 'of',
+       function of() {
+         var items = arguments;
+
+         var len = items.length;
+         var c = strict(this);
+         var newObj = new c(len);
+         var k = 0;
+         while (k < len) {
+           newObj[k] = items[k];
+           ++k;
+         }
+         return newObj;
+       });
+
+     // 22.2.2.3 %TypedArray%.prototype
+     // 22.2.2.4 get %TypedArray% [ @@species ]
+     // 22.2.3 Properties of the %TypedArrayPrototype% Object
+     // 22.2.3.1 get %TypedArray%.prototype.buffer
+     // 22.2.3.2 get %TypedArray%.prototype.byteLength
+     // 22.2.3.3 get %TypedArray%.prototype.byteOffset
+     // 22.2.3.4 %TypedArray%.prototype.constructor
+
+     // 22.2.3.5 %TypedArray%.prototype.copyWithin (target, start [, end ] )
+     define($TypedArray$.prototype, 'copyWithin', Array.prototype.copyWithin);
+
+     // 22.2.3.6 %TypedArray%.prototype.entries ( )
+     define($TypedArray$.prototype, 'entries', Array.prototype.entries);
+
+     // 22.2.3.7 %TypedArray%.prototype.every ( callbackfn [ , thisArg ] )
+     define($TypedArray$.prototype, 'every', Array.prototype.every);
+
+     // 22.2.3.8 %TypedArray%.prototype.fill (value [ , start [ , end ] ] )
+     define(
+       $TypedArray$.prototype, 'fill',
+       //Array.prototype.fill // Doesn't work in Safari 7
+       function fill(value/*, start, end*/) {
+         var start = arguments[1],
+             end = arguments[2];
+
+         var o = ToObject(this);
+         var lenVal = o.length;
+         var len = ToLength(lenVal);
+         len = max(len, 0);
+         var relativeStart = ToInteger(start);
+         var k;
+         if (relativeStart < 0) k = max((len + relativeStart), 0);
+         else k = min(relativeStart, len);
+         var relativeEnd;
+         if (end === undefined) relativeEnd = len;
+         else relativeEnd = ToInteger(end);
+         var final;
+         if (relativeEnd < 0) final = max((len + relativeEnd), 0);
+         else final = min(relativeEnd, len);
+         while (k < final) {
+           var pk = String(k);
+           o[pk] = value;
+           k += 1;
+         }
+         return o;
+       });
+
+     // 22.2.3.9 %TypedArray%.prototype.filter ( callbackfn [ , thisArg ] )
+     define(
+       $TypedArray$.prototype, 'filter',
+       function filter(callbackfn) {
+         var thisArg = arguments[1];
+
+         var o = ToObject(this);
+         var lenVal = o.length;
+         var len = ToLength(lenVal);
+         if (!IsCallable(callbackfn)) throw TypeError();
+         var t = thisArg;
+         var c = o.constructor;
+         var kept = [];
+         var k = 0;
+         var captured = 0;
+         while (k < len) {
+           var kValue = o[k];
+           var selected = callbackfn.call(t, kValue, k, o);
+           if (selected) {
+             kept.push(kValue);
+             ++captured;
+           }
+           ++k;
+         }
+         var a = new c(captured);
+         var n = 0;
+         for (var i = 0; i < kept.length; ++i) {
+           var e = kept[i];
+           a[n] = e;
+           ++n;
+         }
+         return a;
+       });
+
+     // 22.2.3.10 %TypedArray%.prototype.find (predicate [ , thisArg ] )
+     define($TypedArray$.prototype, 'find', Array.prototype.find);
+
+     // 22.2.3.11 %TypedArray%.prototype.findIndex ( predicate [ , thisArg ] )
+     define($TypedArray$.prototype, 'findIndex', Array.prototype.findIndex);
+
+     // 22.2.3.12 %TypedArray%.prototype.forEach ( callbackfn [ , thisArg ] )
+     define($TypedArray$.prototype, 'forEach', Array.prototype.forEach);
+
+     // 22.2.3.13 %TypedArray%.prototype.indexOf (searchElement [ , fromIndex ] )
+     define($TypedArray$.prototype, 'indexOf', Array.prototype.indexOf);
+
+     // 22.2.3.14 %TypedArray%.prototype.join ( separator )
+     define($TypedArray$.prototype, 'join', Array.prototype.join);
+
+     // 22.2.3.15 %TypedArray%.prototype.keys ( )
+     define($TypedArray$.prototype, 'keys', Array.prototype.keys);
+
+     // 22.2.3.16 %TypedArray%.prototype.lastIndexOf ( searchElement [ , fromIndex ] )
+     define($TypedArray$.prototype, 'lastIndexOf', Array.prototype.lastIndexOf);
+
+     // 22.2.3.17 get %TypedArray%.prototype.length
+
+     // 22.2.3.18 %TypedArray%.prototype.map ( callbackfn [ , thisArg ] )
+     define(
+       $TypedArray$.prototype, 'map',
+       function map(callbackfn) {
+         var thisArg = arguments[1];
+
+         var o = ToObject(this);
+         var lenValue = o.length;
+         var len = ToLength(lenValue);
+         if (!IsCallable(callbackfn)) throw TypeError();
+         var t = thisArg;
+         var a = undefined;
+         var c = o.constructor;
+         if (IsConstructor(c))
+           a = new c(len);
+         if (a === undefined)
+           a = new Array(len);
+         var k = 0;
+         while (k < len) {
+           var kPresent = HasProperty(o, k);
+           if (kPresent) {
+             var kValue = o[k];
+             var mappedValue = callbackfn.call(t, kValue, k, o);
+             a[k] = mappedValue;
+           }
+           ++k;
+         }
+         return a;
+       });
+
+     // 22.2.3.19 %TypedArray%.prototype.reduce ( callbackfn [, initialValue] )
+     define($TypedArray$.prototype, 'reduce', Array.prototype.reduce);
+
+     // 22.2.3.20 %TypedArray%.prototype.reduceRight ( callbackfn [, initialValue] )
+     define($TypedArray$.prototype, 'reduceRight', Array.prototype.reduceRight);
+
+     // 22.2.3.21 %TypedArray%.prototype.reverse ( )
+     define($TypedArray$.prototype, 'reverse', Array.prototype.reverse);
+
+     // 22.2.3.22 %TypedArray%.prototype.set ( overloaded [ , offset ])
+     // 22.2.3.22.1 %TypedArray%.prototype.set (array [ , offset ] )
+     // 22.2.3.22.2 %TypedArray%.prototype.set(typedArray [, offset ] )
+
+     // 22.2.3.23 %TypedArray%.prototype.slice ( start, end )
+     define(
+       $TypedArray$.prototype, 'slice',
+       function slice(start, end) {
+         var o = ToObject(this);
+         var lenVal = o.length;
+         var len = ToLength(lenVal);
+         var relativeStart = ToInteger(start);
+         var k = (relativeStart < 0) ? max(len + relativeStart, 0) : min(relativeStart, len);
+         var relativeEnd = (end === undefined) ? len : ToInteger(end);
+         var final = (relativeEnd < 0) ? max(len + relativeEnd, 0) : min(relativeEnd, len);
+         var count = final - k;
+         var c = o.constructor;
+         if (IsConstructor(c)) {
+           var a = new c(count);
+         } else {
+           throw TypeError();
+         }
+         var n = 0;
+         while (k < final) {
+           var kValue = o[k];
+           a[n] = kValue;
+           ++k;
+           ++n;
+         }
+         return a;
+       });
+
+     // 22.2.3.24 %TypedArray%.prototype.some ( callbackfn [ , thisArg ] )
+     define($TypedArray$.prototype, 'some', Array.prototype.some);
+
+     // 22.2.3.25 %TypedArray%.prototype.sort ( comparefn )
+     define(
+       $TypedArray$.prototype, 'sort',
+       function sort() {
+         var comparefn = arguments[0];
+
+         function sortCompare(x, y) {
+           console.assert(Type(x) === 'number' && Type(y) === 'number');
+           if (x !== x && y !== y) return +0;
+           if (x !== x) return 1;
+           if (y !== y) return -1;
+           if (comparefn !== undefined) {
+             return comparefn(x, y);
+           }
+           if (x < y) return -1;
+           if (x > y) return 1;
+           return +0;
+         }
+         return Array.prototype.sort.call(this, sortCompare);
+       });
+
+     // 22.2.3.26 %TypedArray%.prototype.subarray( [ begin [ , end ] ] )
+     // 22.2.3.27 %TypedArray%.prototype.toLocaleString ([ reserved1 [ , reserved2 ] ])
+     // 22.2.3.28 %TypedArray%.prototype.toString ( )
+
+     // 22.2.3.29 %TypedArray%.prototype.values ( )
+     define($TypedArray$.prototype, 'values', Array.prototype.values);
+
+     // 22.2.3.30 %TypedArray%.prototype [ @@iterator ] ( )
+     define(
+       $TypedArray$.prototype, $$iterator,
+       $TypedArray$.prototype.values
+     );
+
+     // 22.2.3.31 get %TypedArray%.prototype [ @@toStringTag ]
+     define($TypedArray$.prototype, $$toStringTag, $TypedArrayName$);
+
+     // 22.2.4 The TypedArray Constructors
+     // 22.2.4.1TypedArray( ... argumentsList)
+     // 22.2.5 Properties of the TypedArray Constructors
+     // 22.2.5.1 TypedArray.BYTES_PER_ELEMENT
+     // 22.2.5.2 TypedArray.prototype
+     // 22.2.6 Properties of TypedArray Prototype Objects
+     // 22.2.6.1 TypedArray.prototype.BYTES_PER_ELEMENT
+     // 22.2.6.2 TypedArray.prototype.constructor
+     // 22.2.7 Properties of TypedArray Instances
+   });
+
+  // ---------------------------------------
+  // 23 Keyed Collection
+  // ---------------------------------------
+
+  // ---------------------------------------
+  // 23.1 Map Objects
+  // ---------------------------------------
+
+  (function() {
+    // 23.1.1 The Map Constructor
+
+    // 23.1.1.1 Map ( [ iterable ] )
+    /** @constructor */
+    function Map(/*iterable*/) {
+      var map = strict(this);
+      var iterable = arguments[0];
+
+      if (Type(map) !== 'object') throw TypeError();
+      if ('[[MapData]]' in map) throw TypeError();
+
+      if (iterable !== undefined) {
+        var adder = map['set'];
+        if (!IsCallable(adder)) throw TypeError();
+        var iter = GetIterator(ToObject(iterable));
+      }
+      set_internal(map, '[[MapData]]', { keys: [], values: [] });
+      if (iter === undefined) return map;
+      while (true) {
+        var next = IteratorStep(iter);
+        if (next === false)
+          return map;
+        var nextItem = IteratorValue(next);
+        if (Type(nextItem) !== 'object') throw TypeError();
+        var k = nextItem[0];
+        var v = nextItem[1];
+        adder.call(map, k, v);
+      }
+
+      return map;
+    }
+
+    if (!('Map' in global) || OVERRIDE_NATIVE_FOR_TESTING ||
+        (function() { try { new global.Map([]); return false; } catch (_) { return true; } }()) ||
+        (function() { try { return !new global.Map().entries().next; } catch (_) { return true; } }()) ||
+        (new global.Map([['a', 1]]).size !== 1))
+      global.Map = Map;
+
+
+    function MapDataIndexOf(mapData, key) {
+      var i;
+      if (key === key) return mapData.keys.indexOf(key);
+      // Slow case for NaN
+      for (i = 0; i < mapData.keys.length; i += 1)
+        if (SameValueZero(mapData.keys[i], key)) return i;
+      return -1;
+    }
+
+    // 23.1.1.2 new Map ( ... argumentsList )
+    // 23.1.2 Properties of the Map Constructor
+    // 23.1.2.1 Map.prototype
+    var $MapPrototype$ = {};
+    Map.prototype = $MapPrototype$;
+
+    // 23.1.2.2 get Map [ @@species ]
+
+    // 23.1.3 Properties of the Map Prototype Object
+    // 23.1.3.1 Map.prototype.clear ()
+    define(
+      Map.prototype, 'clear',
+      function clear() {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        if (!('[[MapData]]' in m)) throw TypeError();
+        if (m['[[MapData]]'] === undefined) throw TypeError();
+        var entries = m['[[MapData]]'];
+        entries.keys.length = 0;
+        entries.values.length = 0;
+        return undefined;
+      });
+
+    // 23.1.3.2 Map.prototype.constructor
+
+    // 23.1.3.3 Map.prototype.delete ( key )
+    define(
+      Map.prototype, 'delete',
+      function delete_(key) {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        if (!('[[MapData]]' in m)) throw TypeError();
+        if (m['[[MapData]]'] === undefined) throw TypeError();
+        var entries = m['[[MapData]]'];
+        var i = MapDataIndexOf(entries, key);
+        if (i < 0) return false;
+        entries.keys[i] = empty;
+        entries.values[i] = empty;
+        return true;
+      });
+
+    // 23.1.3.4 Map.prototype.entries ( )
+    define(
+      Map.prototype, 'entries',
+      function entries() {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        return CreateMapIterator(m, 'key+value');
+      });
+
+    // 23.1.3.5 Map.prototype.forEach ( callbackfn [ , thisArg ] )
+    define(
+      Map.prototype, 'forEach',
+      function forEach(callbackfn /*, thisArg*/) {
+        var thisArg = arguments[1];
+
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        if (!('[[MapData]]' in m)) throw TypeError();
+        if (m['[[MapData]]'] === undefined) throw TypeError();
+        var entries = m['[[MapData]]'];
+
+        if (!IsCallable(callbackfn)) {
+          throw TypeError('First argument to forEach is not callable.');
+        }
+        for (var i = 0; i < entries.keys.length; ++i) {
+          if (entries.keys[i] !== empty) {
+            callbackfn.call(thisArg, entries.values[i], entries.keys[i], m);
+          }
+        }
+        return undefined;
+      });
+
+    // 23.1.3.6 Map.prototype.get ( key )
+    define(
+      Map.prototype, 'get',
+      function get(key) {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        if (!('[[MapData]]' in m)) throw TypeError();
+        if (m['[[MapData]]'] === undefined) throw TypeError();
+        var entries = m['[[MapData]]'];
+        var i = MapDataIndexOf(entries, key);
+        if (i >= 0) return entries.values[i];
+        return undefined;
+      });
+
+    // 23.1.3.7 Map.prototype.has ( key )
+    define(
+      Map.prototype, 'has',
+      function has(key) {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        if (!('[[MapData]]' in m)) throw TypeError();
+        if (m['[[MapData]]'] === undefined) throw TypeError();
+        var entries = m['[[MapData]]'];
+        if (MapDataIndexOf(entries, key) >= 0) return true;
+        return false;
+      });
+
+    // 23.1.3.8 Map.prototype.keys ( )
+    define(
+      Map.prototype, 'keys',
+      function keys() {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        return CreateMapIterator(m, 'key');
+      });
+
+    // 23.1.3.9 Map.prototype.set ( key , value )
+    define(
+      Map.prototype, 'set',
+      function set(key, value) {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        if (!('[[MapData]]' in m)) throw TypeError();
+        if (m['[[MapData]]'] === undefined) throw TypeError();
+        var entries = m['[[MapData]]'];
+        var i = MapDataIndexOf(entries, key);
+        if (i < 0) i = entries.keys.length;
+        if (SameValue(key, -0)) key = 0;
+        entries.keys[i] = key;
+        entries.values[i] = value;
+        return m;
+      });
+
+    // 23.1.3.10 get Map.prototype.size
+    Object.defineProperty(
+      Map.prototype, 'size', {
+        get: function() {
+          var m = strict(this);
+          if (Type(m) !== 'object') throw TypeError();
+          if (!('[[MapData]]' in m)) throw TypeError();
+          if (m['[[MapData]]'] === undefined) throw TypeError();
+          var entries = m['[[MapData]]'];
+          var count = 0;
+          for (var i = 0; i < entries.keys.length; ++i) {
+            if (entries.keys[i] !== empty)
+              count = count + 1;
+          }
+          return count;
+        }
+      });
+
+    // 23.1.3.11 Map.prototype.values ( )
+    define(
+      Map.prototype, 'values',
+      function values() {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        return CreateMapIterator(m, 'value');
+      });
+
+    // 23.1.3.12 Map.prototype [ @@iterator ]( )
+    define(
+      Map.prototype, $$iterator,
+      function() {
+        var m = strict(this);
+        if (Type(m) !== 'object') throw TypeError();
+        return CreateMapIterator(m, 'key+value');
+      });
+
+    // 23.1.3.13 Map.prototype [ @@toStringTag ]
+    define(global.Map.prototype, $$toStringTag, 'Map');
+
+    // 23.1.4 Properties of Map Instances
+    // 23.1.5 Map Iterator Objects
+
+    /** @constructor */
+    function MapIterator() {}
+
+    // 23.1.5.1 CreateMapIterator Abstract Operation
+    function CreateMapIterator(map, kind) {
+      if (Type(map) !== 'object') throw TypeError();
+      if (!('[[MapData]]' in map)) throw TypeError();
+      if (map['[[MapData]]'] === undefined) throw TypeError();
+      var iterator = new MapIterator;
+      set_internal(iterator, '[[Map]]', map);
+      set_internal(iterator, '[[MapNextIndex]]', 0);
+      set_internal(iterator, '[[MapIterationKind]]', kind);
+      return iterator;
+    }
+
+    // 23.1.5.2 The %MapIteratorPrototype% Object
+    var $MapIteratorPrototype$ = Object.create($IteratorPrototype$);
+    MapIterator.prototype = $MapIteratorPrototype$;
+
+    // 23.1.5.2.1 %MapIteratorPrototype%.next ( )
+    define(
+      $MapIteratorPrototype$, 'next',
+      function next() {
+        var o = strict(this);
+        if (Type(o) !== 'object') throw TypeError();
+        var m = o['[[Map]]'],
+            index = o['[[MapNextIndex]]'],
+            itemKind = o['[[MapIterationKind]]'],
+            entries = m['[[MapData]]'];
+        while (index < entries.keys.length) {
+          var e = {key: entries.keys[index], value: entries.values[index]};
+          index = index += 1;
+          set_internal(o, '[[MapNextIndex]]', index);
+          if (e.key !== empty) {
+            if (itemKind === 'key') {
+              return CreateIterResultObject(e.key, false);
+            } else if (itemKind === 'value') {
+              return CreateIterResultObject(e.value, false);
+            } else {
+              return CreateIterResultObject([e.key, e.value], false);
+            }
+          }
+        }
+        return CreateIterResultObject(undefined, true);
+      });
+
+    // 23.1.5.2.2 %MapIteratorPrototype% [ @@toStringTag ]
+    define($MapIteratorPrototype$, $$toStringTag, 'Map Iterator');
+
+    // 23.1.5.3 Properties of Map Iterator Instances
+  }());
+
+  // ---------------------------------------
+  // 23.2 Set Objects
+  // ---------------------------------------
+
+  (function() {
+    // 23.2.1 The Set Constructor
+    // 23.2.1.1 Set ( [ iterable ] )
+
+    /** @constructor */
+    function Set(/*iterable*/) {
+      var set = strict(this);
+      var iterable = arguments[0];
+
+      if (Type(set) !== 'object') throw TypeError();
+      if ('[[SetData]]' in set) throw TypeError();
+
+      if (iterable !== undefined) {
+        var adder = set['add'];
+        if (!IsCallable(adder)) throw TypeError();
+        var iter = GetIterator(ToObject(iterable));
+      }
+      set_internal(set, '[[SetData]]', []);
+      if (iter === undefined) return set;
+      while (true) {
+        var next = IteratorStep(iter);
+        if (next === false)
+          return set;
+        var nextValue = IteratorValue(next);
+        adder.call(set, nextValue);
+      }
+
+      return set;
+    }
+
+    if (!('Set' in global) || OVERRIDE_NATIVE_FOR_TESTING ||
+        (function() { try { return !new global.Set().entries().next; } catch (_) { return true; } }()) ||
+        (new global.Set([1]).size !== 1))
+      global.Set = Set;
+
+    function SetDataIndexOf(setData, key) {
+      var i;
+      if (key === key)
+        return setData.indexOf(key);
+      // Slow case for NaN
+      for (i = 0; i < setData.length; i += 1)
+        if (SameValueZero(setData[i], key)) return i;
+      return -1;
+    }
+
+    // 23.2.1.2 new Set ( ...argumentsList )
+    // 23.2.2 Properties of the Set Constructor
+
+    // 23.2.2.1 Set.prototype
+    var $SetPrototype$ =  {};
+    Set.prototype = $SetPrototype$;
+
+    // 23.2.2.2 get Set [ @@species ]
+    // 23.2.3 Properties of the Set Prototype Object
+
+    // 23.2.3.1 Set.prototype.add (value )
+    define(
+      Set.prototype, 'add',
+      function add(value) {
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        if (!('[[SetData]]' in s)) throw TypeError();
+        if (s['[[SetData]]'] === undefined) throw TypeError();
+        if (SameValue(value, -0)) value = 0;
+        var entries = s['[[SetData]]'];
+        var i = SetDataIndexOf(entries, value);
+        if (i < 0) i = s['[[SetData]]'].length;
+        s['[[SetData]]'][i] = value;
+
+        return s;
+      });
+
+    // 23.2.3.2 Set.prototype.clear ()
+    define(
+      Set.prototype, 'clear',
+      function clear() {
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        if (!('[[SetData]]' in s)) throw TypeError();
+        if (s['[[SetData]]'] === undefined) throw TypeError();
+        var entries = s['[[SetData]]'];
+        entries.length = 0;
+        return undefined;
+      });
+
+    // 23.2.3.3 Set.prototype.constructor
+    // 23.2.3.4 Set.prototype.delete ( value )
+    define(
+      Set.prototype, 'delete',
+      function delete_(value) {
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        if (!('[[SetData]]' in s)) throw TypeError();
+        if (s['[[SetData]]'] === undefined) throw TypeError();
+        var entries = s['[[SetData]]'];
+        var i = SetDataIndexOf(entries, value);
+        if (i < 0) return false;
+        entries[i] = empty;
+        return true;
+      });
+
+    // 23.2.3.5 Set.prototype.entries ( )
+    define(
+      Set.prototype, 'entries',
+      function entries() {
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        return CreateSetIterator(s, 'key+value');
+      });
+
+    // 23.2.3.6 Set.prototype.forEach ( callbackfn [ , thisArg ] )
+    define(
+      Set.prototype, 'forEach',
+      function forEach(callbackfn/*, thisArg*/) {
+        var thisArg = arguments[1];
+
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        if (!('[[SetData]]' in s)) throw TypeError();
+        if (s['[[SetData]]'] === undefined) throw TypeError();
+        var entries = s['[[SetData]]'];
+
+        if (!IsCallable(callbackfn)) {
+          throw TypeError('First argument to forEach is not callable.');
+        }
+        for (var i = 0; i < entries.length; ++i) {
+          if (entries[i] !== empty) {
+            callbackfn.call(thisArg, entries[i], entries[i], s);
+          }
+        }
+      });
+
+    // 23.2.3.7 Set.prototype.has ( value )
+    define(
+      Set.prototype, 'has',
+      function has(key) {
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        if (!('[[SetData]]' in s)) throw TypeError();
+        if (s['[[SetData]]'] === undefined) throw TypeError();
+        var entries = s['[[SetData]]'];
+        return SetDataIndexOf(entries, key) !== -1;
+      });
+
+    // 23.2.3.8 Set.prototype.keys ( )
+    // See Set.prototype.values
+
+    // 23.2.3.9 get Set.prototype.size
+    Object.defineProperty(
+      Set.prototype, 'size', {
+        get: function() {
+          var s = strict(this);
+          if (Type(s) !== 'object') throw TypeError();
+          if (!('[[SetData]]' in s)) throw TypeError();
+          if (s['[[SetData]]'] === undefined) throw TypeError();
+          var entries = s['[[SetData]]'];
+          var count = 0;
+          for (var i = 0; i < entries.length; ++i) {
+            if (entries[i] !== empty)
+              count = count + 1;
+          }
+          return count;
+        }
+      });
+
+    // 23.2.3.10 Set.prototype.values ( )
+    define(
+      Set.prototype, 'values',
+      function values() {
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        return CreateSetIterator(s, 'value');
+      });
+    // NOTE: function name is still 'values':
+    Set.prototype.keys = Set.prototype.values;
+
+    // 23.2.3.11 Set.prototype [@@iterator ] ( )
+    define(
+      Set.prototype, $$iterator,
+      function() {
+        var s = strict(this);
+        if (Type(s) !== 'object') throw TypeError();
+        return CreateSetIterator(s);
+      });
+
+    // 23.2.3.12 Set.prototype [ @@toStringTag ]
+    define(global.Set.prototype, $$toStringTag, 'Set');
+
+    // 23.2.4 Properties of Set Instances
+    // 23.2.5 Set Iterator Objects
+    /** @constructor */
+    function SetIterator() {}
+
+    // 23.2.5.1 CreateSetIterator Abstract Operation
+    function CreateSetIterator(set, kind) {
+      if (Type(set) !== 'object') throw TypeError();
+      if (!('[[SetData]]' in set)) throw TypeError();
+      if (set['[[SetData]]'] === undefined) throw TypeError();
+      var iterator = new SetIterator;
+      set_internal(iterator, '[[IteratedSet]]', set);
+      set_internal(iterator, '[[SetNextIndex]]', 0);
+      set_internal(iterator, '[[SetIterationKind]]', kind);
+      return iterator;
+    }
+
+    // 23.2.5.2 The %SetIteratorPrototype% Object
+    var $SetIteratorPrototype$ = Object.create($IteratorPrototype$);
+    SetIterator.prototype = $SetIteratorPrototype$;
+
+    // 23.2.5.2.1 %SetIteratorPrototype%.next( )
+    define(
+      $SetIteratorPrototype$, 'next',
+      function next() {
+        var o = strict(this);
+        if (Type(o) !== 'object') throw TypeError();
+        var s = o['[[IteratedSet]]'],
+            index = o['[[SetNextIndex]]'],
+            itemKind = o['[[SetIterationKind]]'],
+            entries = s['[[SetData]]'];
+        while (index < entries.length) {
+          var e = entries[index];
+          index = index += 1;
+          set_internal(o, '[[SetNextIndex]]', index);
+          if (e !== empty) {
+            if (itemKind === 'key+value')
+              return CreateIterResultObject([e, e], false);
+            return CreateIterResultObject(e, false);
+          }
+        }
+        return CreateIterResultObject(undefined, true);
+      });
+
+    // 23.2.5.2.2 %SetIteratorPrototype% [ @@toStringTag ]
+    define($SetIteratorPrototype$, $$toStringTag, 'Set Iterator');
+
+    // 23.2.5.3 Properties of Set Iterator Instances
+
+  }());
+
+  // ---------------------------------------
+  // 23.3 WeakMap Objects
+  // ---------------------------------------
+
+  (function() {
+    // 23.3.1 The WeakMap Constructor
+    // 23.3.1.1 WeakMap ( [ iterable ] )
+    /** @constructor */
+    function WeakMap(/*iterable*/) {
+      var map = strict(this);
+      var iterable = arguments[0];
+
+      if (Type(map) !== 'object') throw TypeError();
+      if ('[[WeakMapData]]' in map) throw TypeError();
+
+      if (iterable !== undefined) {
+        var adder = map['set'];
+        if (!IsCallable(adder)) throw TypeError();
+        var iter = GetIterator(ToObject(iterable));
+      }
+      set_internal(map, '[[WeakMapData]]', new EphemeronTable);
+      if (iter === undefined) return map;
+      while (true) {
+        var next = IteratorStep(iter);
+        if (next === false)
+          return map;
+        var nextValue = IteratorValue(next);
+        if (Type(nextValue) !== 'object') throw TypeError();
+        var k = nextValue[0];
+        var v = nextValue[1];
+        adder.call(map, k, v);
+      }
+
+      return map;
+    }
+
+    if (!('WeakMap' in global) || OVERRIDE_NATIVE_FOR_TESTING)
+      global.WeakMap = WeakMap;
+
+    // 23.3.2 Properties of the WeakMap Constructor
+    // 23.3.2.1 WeakMap.prototype
+    var $WeakMapPrototype$ = {};
+    WeakMap.prototype = $WeakMapPrototype$;
+
+
+
+   // 23.3.2.2 WeakMap[ @@create ] ( )
+    // 23.3.3 Properties of the WeakMap Prototype Object
+
+    // 23.3.3.1 WeakMap.prototype.constructor
+
+    // 23.3.3.2 WeakMap.prototype.delete ( key )
+    define(
+      WeakMap.prototype, 'delete',
+      function delete_(key) {
+        var M = strict(this);
+        if (Type(M) !== 'object') throw TypeError();
+        if (M['[[WeakMapData]]'] === undefined) throw TypeError();
+        if (Type(key) !== 'object') throw TypeError('Expected object');
+        return M['[[WeakMapData]]'].remove(key);
+      });
+
+    // 23.3.3.3 WeakMap.prototype.get ( key )
+    define(
+      WeakMap.prototype, 'get',
+      function get(key, defaultValue) {
+        var M = strict(this);
+        if (Type(M) !== 'object') throw TypeError();
+        if (M['[[WeakMapData]]'] === undefined) throw TypeError();
+        if (Type(key) !== 'object') throw TypeError('Expected object');
+        return M['[[WeakMapData]]'].get(key, defaultValue);
+      });
+
+    // 23.3.3.4 WeakMap.prototype.has ( key )
+    define(
+      WeakMap.prototype, 'has',
+      function has(key) {
+        var M = strict(this);
+        if (Type(M) !== 'object') throw TypeError();
+        if (M['[[WeakMapData]]'] === undefined) throw TypeError();
+        if (Type(key) !== 'object') throw TypeError('Expected object');
+        return M['[[WeakMapData]]'].has(key);
+      });
+
+    // 23.3.3.5 WeakMap.prototype.set ( key , value )
+    define(
+      WeakMap.prototype, 'set',
+      function set(key, value) {
+        var M = strict(this);
+        if (Type(M) !== 'object') throw TypeError();
+        if (M['[[WeakMapData]]'] === undefined) throw TypeError();
+        if (Type(key) !== 'object') throw TypeError('Expected object');
+        M['[[WeakMapData]]'].set(key, value);
+        return M;
+      });
+
+    // 23.3.3.6 WeakMap.prototype [ @@toStringTag ]
+    define(global.WeakMap.prototype, $$toStringTag, 'WeakMap');
+
+    // 23.3.4 Properties of WeakMap Instances
+
+    // Polyfills for incomplete native implementations:
+    (function() {
+      var wm = new global.WeakMap();
+      var orig = global.WeakMap.prototype.set;
+      define(global.WeakMap.prototype, 'set', function set() {
+        orig.apply(this, arguments);
+        return this;
+      }, wm.set({}, 0) !== wm);
+    }());
+  }());
+
+  // ---------------------------------------
+  // 23.4 WeakSet Objects
+  // ---------------------------------------
+
+  (function() {
+    // 23.4.1 The WeakSet Constructor
+    // 23.4.1.1 WeakSet ( [ iterable ] )
+    /** @constructor */
+    function WeakSet(/*iterable*/) {
+      var set = strict(this);
+      var iterable = arguments[0];
+
+      if (Type(set) !== 'object') throw TypeError();
+      if ('[[WeakSetData]]' in set) throw TypeError();
+
+      if (iterable !== undefined) {
+        var adder = set['add'];
+        if (!IsCallable(adder)) throw TypeError();
+        var iter = GetIterator(ToObject(iterable));
+      }
+      set_internal(set, '[[WeakSetData]]', new EphemeronTable);
+      if (iter === undefined) return set;
+      while (true) {
+        var next = IteratorStep(iter);
+        if (next === false)
+          return set;
+        var nextValue = IteratorValue(next);
+        adder.call(set, nextValue);
+      }
+
+      return set;
+    }
+
+    if (!('WeakSet' in global) || OVERRIDE_NATIVE_FOR_TESTING)
+      global.WeakSet = WeakSet;
+
+    // 23.4.2 Properties of the WeakSet Constructor
+    // 23.4.2.1 WeakSet.prototype
+    var $WeakSetPrototype$ = {};
+    WeakSet.prototype = $WeakSetPrototype$;
+
+    // 23.4.3 Properties of the WeakSet Prototype Object
+    // 23.4.3.1 WeakSet.prototype.add (value )
+    define(
+      WeakSet.prototype, 'add',
+      function add(value) {
+        var S = strict(this);
+        if (Type(S) !== 'object') throw TypeError();
+        if (S['[[WeakSetData]]'] === undefined) throw TypeError();
+        if (Type(value) !== 'object') throw TypeError('Expected object');
+        S['[[WeakSetData]]'].set(value, true);
+        return S;
+      });
+
+    // 23.4.3.2 WeakSet.prototype.constructor
+    // 23.4.3.3 WeakSet.prototype.delete ( value )
+    define(
+      WeakSet.prototype, 'delete',
+      function delete_(value) {
+        var S = strict(this);
+        if (Type(S) !== 'object') throw TypeError();
+        if (S['[[WeakSetData]]'] === undefined) throw TypeError();
+        if (Type(value) !== 'object') throw TypeError('Expected object');
+        return S['[[WeakSetData]]'].remove(value);
+      });
+
+    // 23.4.3.4 WeakSet.prototype.has ( value )
+    define(
+      WeakSet.prototype, 'has',
+      function has(key) {
+        var S = strict(this);
+        if (Type(S) !== 'object') throw TypeError();
+        if (S['[[WeakSetData]]'] === undefined) throw TypeError();
+        if (Type(key) !== 'object') throw TypeError('Expected object');
+        return S['[[WeakSetData]]'].has(key);
+      });
+
+    // 23.4.3.5 WeakSet.prototype [ @@toStringTag ]
+    define(global.WeakSet.prototype, $$toStringTag, 'WeakSet');
+
+    // 23.4.4 Properties of WeakSet Instances
+
+    // Polyfills for incomplete native implementations:
+    (function() {
+      var ws = new global.WeakSet();
+      var orig = global.WeakSet.prototype.add;
+      define(global.WeakSet.prototype, 'add', function add() {
+        orig.apply(this, arguments);
+        return this;
+      }, ws.add({}) !== ws);
+    }());
+  }());
+
+  // ---------------------------------------
+  // 24 Structured Data
+  // ---------------------------------------
+
+  // ---------------------------------------
+  // 24.1 ArrayBuffer Objects
+  // ---------------------------------------
+
+  // See typedarray.js for TypedArray polyfill
+
+  (function() {
+    if (!('ArrayBuffer' in global))
+      return;
+
+    // 24.1.1 Abstract Operations For ArrayBuffer Objects
+    // 24.1.1.1 AllocateArrayBuffer( constructor, byteLength )
+    // 24.1.1.2 IsDetachedBuffer( arrayBuffer )
+    // 24.1.1.3 DetachArrayBuffer( arrayBuffer )
+    // 24.1.1.4 CloneArrayBuffer( srcBuffer, srcByteOffset [, cloneConstructor] )
+    // 24.1.1.5 GetValueFromBuffer ( arrayBuffer, byteIndex, type, isLittleEndian )
+    // 24.1.1.6 SetValueInBuffer ( arrayBuffer, byteIndex, type, value, isLittleEndian )
+    // 24.1.2 The ArrayBuffer Constructor
+    // 24.1.2.1 ArrayBuffer( length )
+    // 24.1.3 Properties of the ArrayBuffer Constructor
+
+    // 24.1.3.1 ArrayBuffer.isView ( arg )
+    define(
+      ArrayBuffer, 'isView',
+      function isView(arg) {
+        if (Type(arg) !== 'object') return false;
+        if ('buffer' in arg && arg.buffer instanceof ArrayBuffer) return true;
+        return false;
+      });
+
+    // 24.1.3.2 ArrayBuffer.prototype
+    // 24.1.3.3 get ArrayBuffer [ @@species ]
+    // 24.1.4 Properties of the ArrayBuffer Prototype Object
+    // 24.1.4.1 get ArrayBuffer.prototype.byteLength
+    // 24.1.4.2 ArrayBuffer.prototype.constructor
+    // 24.1.4.3 ArrayBuffer.prototype.slice ( start , end)
+
+    // 24.1.4.4 ArrayBuffer.prototype [ @@toStringTag ]
+    define(ArrayBuffer.prototype, $$toStringTag, 'ArrayBuffer');
+
+    // 24.1.5 Properties of the ArrayBuffer Instances
+  }());
+
+  // ---------------------------------------
+  // 24.2 DataView Objects
+  // ---------------------------------------
+
+  // See typedarray.js for TypedArray polyfill
+
+  (function() {
+    if (!('DataView' in global))
+      return;
+
+    // 24.2.1 Abstract Operations For DataView Objects
+    // 24.2.1.1 GetViewValue(view, requestIndex, isLittleEndian, type)
+    // 24.2.1.2 SetViewValue(view, requestIndex, isLittleEndian, type, value)
+    // 24.2.2 The DataView Constructor
+    // 24.2.2.1 DataView (buffer [ , byteOffset [ , byteLength ] ] )
+    // 24.2.3 Properties of the DataView Constructor
+    // 24.2.3.1 DataView.prototype
+    // 24.2.4 Properties of the DataView Prototype Object
+    // 24.2.4.1 get DataView.prototype.buffer
+    // 24.2.4.2 get DataView.prototype.byteLength
+    // 24.2.4.3 get DataView.prototype.byteOffset
+    // 24.2.4.4 DataView.prototype.constructor
+    // 24.2.4.5 DataView.prototype.getFloat32 ( byteOffset [ , littleEndian ] )
+    // 24.2.4.6 DataView.prototype.getFloat64 ( byteOffset [ , littleEndian ] )
+    // 24.2.4.7 DataView.prototype.getInt8 ( byteOffset )
+    // 24.2.4.8 DataView.prototype.getInt16 ( byteOffset [ , littleEndian ] )
+    // 24.2.4.9 DataView.prototype.getInt32 ( byteOffset [ , littleEndian ] )
+    // 24.2.4.10 DataView.prototype.getUint8 ( byteOffset )
+    // 24.2.4.11 DataView.prototype.getUint16 ( byteOffset [ , littleEndian ] )
+    // 24.2.4.12 DataView.prototype.getUint32 ( byteOffset [ , littleEndian ] )
+    // 24.2.4.13 DataView.prototype.setFloat32 ( byteOffset, value [ , littleEndian ] )
+    // 24.2.4.14 DataView.prototype.setFloat64 ( byteOffset, value [ , littleEndian ] )
+    // 24.2.4.15 DataView.prototype.setInt8 ( byteOffset, value )
+    // 24.2.4.16 DataView.prototype.setInt16 ( byteOffset, value [ , littleEndian ] )
+    // 24.2.4.17 DataView.prototype.setInt32 ( byteOffset, value [ , littleEndian ] )
+    // 24.2.4.18 DataView.prototype.setUint8 ( byteOffset, value )
+    // 24.2.4.19 DataView.prototype.setUint16 ( byteOffset, value [ , littleEndian ] )
+    // 24.2.4.20 DataView.prototype.setUint32 ( byteOffset, value [ , littleEndian ] )
+
+    // 24.2.4.21 DataView.prototype[ @@toStringTag ]
+    define(DataView.prototype, $$toStringTag, 'DataView');
+
+    // 24.2.5 Properties of DataView Instances
+  }());
+
+  // ---------------------------------------
+  // 24.3 The JSON Object
+  // ---------------------------------------
+
+  // 24.3.1 JSON.parse ( text [ , reviver ] )
+  // 24.3.2 JSON.stringify ( value [ , replacer [ , space ] ] )
+  // 24.3.3 JSON [ @@toStringTag ]
+  define(JSON, $$toStringTag, 'JSON');
+
+  // ---------------------------------------
+  // 25.1 Iteration
+  // ---------------------------------------
+
+  // 25.1.1 Common Iteration Interfaces
+  // 25.1.1.1 The Iterable Interface
+  // 25.1.1.2 The Iterator Interface
+  // 25.1.1.3 The IteratorResult Interface
+
+  // 25.1.2 The %IteratorPrototype% Object
+  // Defined earlier, so other prototypes can reference it.
+  // 25.1.2.1 %IteratorPrototype% [ @@iterator ] ( )
+  define($IteratorPrototype$, $$iterator, function() {
+    return this;
+  });
+
+
+  // ---------------------------------------
+  // 25.4 Promise Objects
+  // ---------------------------------------
+
+  (function() {
+    // 25.4 Promise Objects
+
+    // 25.4.1 Promise Abstract Operations
+
+    // 25.4.1.1 PromiseCapability Records
+    // 25.4.1.1.1 IfAbruptRejectPromise ( value, capability )
+
+    function IfAbruptRejectPromise(value, capability) {
+      var rejectResult = capability['[[Reject]]'].call(undefined, value);
+      return capability['[[Promise]]'];
+    }
+
+    // 25.4.1.2 PromiseReaction Records
+
+    // 25.4.1.3 CreateResolvingFunctions ( promise )
+
+    function CreateResolvingFunctions(promise) {
+      var alreadyResolved = {'[[value]]': false};
+      var resolve = PromiseResolveFunction();
+      set_internal(resolve, '[[Promise]]',  promise);
+      set_internal(resolve, '[[AlreadyResolved]]', alreadyResolved);
+      var reject = PromiseRejectFunction();
+      set_internal(reject, '[[Promise]]', promise);
+      set_internal(reject, '[[AlreadyResolved]]', alreadyResolved);
+      return { '[[Resolve]]': resolve, '[[Reject]]': reject};
+    }
+
+    // 25.4.1.3.1 Promise Reject Functions
+
+    function PromiseRejectFunction() {
+      var F = function(reason) {
+        console.assert(Type(F['[[Promise]]']) === 'object');
+        var promise = F['[[Promise]]'];
+        var alreadyResolved = F['[[AlreadyResolved]]'];
+        if (alreadyResolved['[[value]]']) return undefined;
+        set_internal(alreadyResolved, '[[value]]', true);
+        return RejectPromise(promise, reason);
+      };
+      return F;
+    }
+
+    // 25.4.1.3.2 Promise Resolve Functions
+
+    function PromiseResolveFunction() {
+      var F = function(resolution) {
+        console.assert(Type(F['[[Promise]]']) === 'object');
+        var promise = F['[[Promise]]'];
+        var alreadyResolved = F['[[AlreadyResolved]]'];
+        if (alreadyResolved['[[value]]']) return undefined;
+        set_internal(alreadyResolved, '[[value]]', true);
+
+        if (SameValue(resolution, promise))  {
+          var selfResolutionError = TypeError();
+          return RejectPromise(promise, selfResolutionError);
+        }
+        if (Type(resolution) !== 'object')
+          return FulfillPromise(promise, resolution);
+        try {
+          var then = resolution['then'];
+        } catch(then) {
+          return RejectPromise(promise, then);
+        }
+        if (!IsCallable(then))
+          return FulfillPromise(promise, resolution);
+        EnqueueJob('PromiseJobs', PromiseResolveThenableJob, [promise, resolution, then]);
+        return undefined;
+      };
+      return F;
+    }
+
+    // 25.4.1.4 FulfillPromise ( promise, value )
+
+    function FulfillPromise(promise, value) {
+      console.assert(promise['[[PromiseState]]'] === 'pending');
+      var reactions = promise['[[PromiseFulfillReactions]]'];
+      set_internal(promise, '[[PromiseResult]]', value);
+      set_internal(promise, '[[PromiseFulfillReactions]]', undefined);
+      set_internal(promise, '[[PromiseRejectReactions]]', undefined);
+      set_internal(promise, '[[PromiseState]]', 'fulfilled');
+      return TriggerPromiseReactions(reactions, value);
+    }
+
+    // 25.4.1.5 NewPromiseCapability ( C )
+
+    function NewPromiseCapability(c) {
+      // To keep Promise hermetic, this doesn't look much like the spec.
+      return CreatePromiseCapabilityRecord(undefined, c);
+    }
+
+    // 25.4.1.5.1 CreatePromiseCapabilityRecord ( promise, constructor )
+
+    function CreatePromiseCapabilityRecord(promise, constructor) {
+      // To keep Promise hermetic, this doesn't look much like the spec.
+      console.assert(IsConstructor(constructor));
+      var promiseCapability = {};
+      set_internal(promiseCapability, '[[Promise]]', promise);
+      set_internal(promiseCapability, '[[Resolve]]', undefined);
+      set_internal(promiseCapability, '[[Reject]]', undefined);
+      var executor = GetCapabilitiesExecutor();
+      set_internal(executor, '[[Capability]]', promiseCapability);
+
+      // NOTE: Differs from spec; object is constructed here
+      var constructorResult = promise = new constructor(executor);
+      set_internal(promiseCapability, '[[Promise]]', promise);
+
+      if (!IsCallable(promiseCapability['[[Resolve]]'])) throw TypeError();
+      if (!IsCallable(promiseCapability['[[Reject]]'])) throw TypeError();
+      if (Type(constructorResult) === 'object' && !SameValue(promise, constructorResult)) throw TypeError();
+      return promiseCapability;
+    }
+
+    // 25.4.1.5.2 GetCapabilitiesExecutor Functions
+
+    function GetCapabilitiesExecutor() {
+      var F = function(resolve, reject) {
+        console.assert(F['[[Capability]]']);
+        var promiseCapability = F['[[Capability]]'];
+        if (promiseCapability['[[Resolve]]'] !== undefined) throw TypeError();
+        if (promiseCapability['[[Reject]]'] !== undefined) throw TypeError();
+        set_internal(promiseCapability, '[[Resolve]]', resolve);
+        set_internal(promiseCapability, '[[Reject]]', reject);
+        return undefined;
+      };
+      return F;
+    }
+
+    // 25.4.1.6 IsPromise ( x )
+
+    function IsPromise(x) {
+      if (Type(x) !== 'object') return false;
+      if (!('[[PromiseState]]' in x)) return false;
+      if (x['[[PromiseState]]'] === undefined) return false;
+      return true;
+    }
+
+    // 25.4.1.7 RejectPromise ( promise, reason )
+
+    function RejectPromise(promise, reason) {
+      console.assert(promise['[[PromiseState]]'] === 'pending');
+      var reactions = promise['[[PromiseRejectReactions]]'];
+      set_internal(promise, '[[PromiseResult]]', reason);
+      set_internal(promise, '[[PromiseFulfillReactions]]', undefined);
+      set_internal(promise, '[[PromiseRejectReactions]]', undefined);
+      set_internal(promise, '[[PromiseState]]', 'rejected');
+      return TriggerPromiseReactions(reactions, reason);
+    }
+
+    // 25.4.1.8 TriggerPromiseReactions ( reactions, argument )
+
+    function TriggerPromiseReactions(reactions, argument) {
+      for (var i = 0, len = reactions.length; i < len; ++i)
+        EnqueueJob('PromiseJobs', PromiseReactionJob, [reactions[i], argument]);
+      return undefined;
+    }
+
+    // 25.4.2 Promise Jobs
+
+    // 25.4.2.1 PromiseReactionJob ( reaction, argument )
+
+    function PromiseReactionJob(reaction, argument) {
+      var promiseCapability = reaction['[[Capabilities]]'];
+      var handler = reaction['[[Handler]]'];
+      var handlerResult, status;
+      try {
+        if (handler === 'Identity') handlerResult = argument;
+        else if (handler === 'Thrower') throw argument;
+        else handlerResult = handler.call(undefined, argument);
+      } catch (handlerResult) {
+        status = promiseCapability['[[Reject]]'].call(undefined, handlerResult);
+        NextJob(status); return;
+      }
+      status = promiseCapability['[[Resolve]]'].call(undefined, handlerResult);
+      NextJob(status);
+    }
+
+    // 25.4.2.2 PromiseResolveThenableJob ( promiseToResolve, thenable, then)
+
+    function PromiseResolveThenableJob(promiseToResolve, thenable, then) {
+      // SPEC BUG: promise vs. promiseToResolve
+      var resolvingFunctions = CreateResolvingFunctions(promiseToResolve);
+      try {
+        var thenCallResult = then.call(thenable, resolvingFunctions['[[Resolve]]'],
+                                       resolvingFunctions['[[Reject]]']);
+      } catch (thenCallResult) {
+        var status = resolvingFunctions['[[Reject]]'].call(undefined, thenCallResult);
+        NextJob(status); return;
+      }
+      NextJob(thenCallResult);
+    }
+
+    // 25.4.3 The Promise Constructor
+
+    // 25.4.3.1 Promise ( executor )
+
+    function Promise(executor) {
+      var config = { configurable: false, enumerable: false, writable: true, value: undefined };
+      Object.defineProperty(this, '[[PromiseState]]', config);
+      Object.defineProperty(this, '[[PromiseConstructor]]', config);
+      Object.defineProperty(this, '[[PromiseResult]]', config);
+      Object.defineProperty(this, '[[PromiseFulfillReactions]]', config);
+      Object.defineProperty(this, '[[PromiseRejectReactions]]', config);
+
+      var promise = this;
+      if (Type(promise) !== 'object') throw new TypeError();
+      if (!('[[PromiseState]]' in promise)) throw TypeError();
+      if (promise['[[PromiseState]]'] !== undefined) throw TypeError();
+      if (!IsCallable(executor)) throw TypeError();
+
+      set_internal(promise, '[[PromiseConstructor]]', Promise);
+
+      return InitializePromise(promise, executor);
+    }
+
+    // 25.4.3.1.1 InitializePromise ( promise, executor )
+
+    function InitializePromise(promise, executor) {
+      console.assert('[[PromiseState]]' in promise);
+      console.assert(IsCallable(executor));
+      set_internal(promise, '[[PromiseState]]', 'pending');
+      set_internal(promise, '[[PromiseFulfillReactions]]', []);
+      set_internal(promise, '[[PromiseRejectReactions]]', []);
+      var resolvingFunctions = CreateResolvingFunctions(promise);
+      try {
+        var completion = executor.call(undefined, resolvingFunctions['[[Resolve]]'],
+                                       resolvingFunctions['[[Reject]]']);
+      } catch (completion) {
+        var status = resolvingFunctions['[[Reject]]'].call(undefined, completion);
+      }
+      return promise;
+    }
+
+    // 25.4.4 Properties of the Promise Constructor
+    // 25.4.4.1 Promise.all ( iterable )
+
+    define(Promise, 'all', function all(iterable) {
+      var c = strict(this);
+      var promiseCapability = NewPromiseCapability(c);
+      try {
+        var iterator = GetIterator(iterable);
+      } catch (value) {
+        promiseCapability['[[Reject]]'].call(undefined, value);
+        return promiseCapability['[[Promise]]'];
+      }
+      var values = [];
+      var remainingElementsCount = { value: 1 };
+      var index = 0;
+      while (true) {
+        try {
+          var next = IteratorStep(iterator);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+        if (!next) {
+          remainingElementsCount.value -= 1;
+          if (remainingElementsCount.value === 0) {
+            var resolveResult = promiseCapability['[[Resolve]]'].apply(undefined, values);
+
+
+          }
+          return promiseCapability['[[Promise]]'];
+        }
+        try {
+          var nextValue = IteratorValue(next);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+        try {
+          var nextPromise = c.resolve(nextValue);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+        var resolveElement = PromiseAllResolveElementFunction();
+        set_internal(resolveElement, '[[AlreadyCalled]]', { value: false });
+        set_internal(resolveElement, '[[Index]]', index);
+        set_internal(resolveElement, '[[Values]]', values);
+        set_internal(resolveElement, '[[Capabilities]]', promiseCapability);
+        set_internal(resolveElement, '[[RemainingElements]]', remainingElementsCount);
+        remainingElementsCount.value += 1;
+        try {
+          var result = nextPromise.then(resolveElement, promiseCapability['[[Reject]]']);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+        index += 1;
+      }
+    });
+
+    // 25.4.4.1.1 Promise.all Resolve Element Functions
+
+    function PromiseAllResolveElementFunction() {
+      var F = function(x) {
+        var alreadyCalled = F['[[AlreadyCalled]]'];
+        if (alreadyCalled.value) return undefined;
+        alreadyCalled.value = true;
+        var index = F['[[Index]]'];
+        var values = F['[[Values]]'];
+        var promiseCapability = F['[[Capabilities]]'];
+        var remainingElementsCount = F['[[RemainingElements]]'];
+        try {
+          values[index] = x;
+        } catch (result) {
+          promiseCapability['[[Reject]]'].call(undefined, result);
+          return promiseCapability['[[Promise]]'];
+        }
+        remainingElementsCount.value -= 1;
+        if (remainingElementsCount.value === 0)
+          return promiseCapability['[[Resolve]]'].call(undefined, values);
+        return undefined;
+      };
+      return F;
+    }
+
+    // 25.4.4.2 Promise.prototype
+
+    Promise.prototype = {};
+
+    // 25.4.4.3 Promise.race ( iterable )
+
+    define(Promise, 'race', function race(iterable) {
+      var c = strict(this);
+      var promiseCapability = NewPromiseCapability(c);
+      try {
+        var iterator = GetIterator(iterable);
+      } catch (value) {
+        promiseCapability['[[Reject]]'].call(undefined, value);
+        return promiseCapability['[[Promise]]'];
+      }
+      while (true) {
+        try {
+          var next = IteratorStep(iterator);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+        if (!next) return promiseCapability['[[Promise]]'];
+        try {
+          var nextValue = IteratorValue(next);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+        try {
+          var nextPromise = c.resolve(nextValue);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+        try {
+          nextPromise.then(promiseCapability['[[Resolve]]'], promiseCapability['[[Reject]]']);
+        } catch (value) {
+          promiseCapability['[[Reject]]'].call(undefined, value);
+          return promiseCapability['[[Promise]]'];
+        }
+      }
+    });
+
+    // 25.4.4.4 Promise.reject ( r )
+
+    define(Promise, 'reject', function reject(r) {
+      var c = strict(this);
+      var promiseCapability = NewPromiseCapability(c);
+      var rejectResult = promiseCapability['[[Reject]]'].call(undefined, r);
+      return promiseCapability['[[Promise]]'];
+    });
+
+    // 25.4.4.5 Promise.resolve ( x )
+
+    define(Promise, 'resolve', function resolve(x) {
+      var c = strict(this);
+      if (IsPromise(x)) {
+        var constructor = x['[[PromiseConstructor]]'];
+        if (SameValue(constructor, c)) return x;
+      }
+      var promiseCapability = NewPromiseCapability(c);
+      var resolveResult = promiseCapability['[[Resolve]]'].call(undefined, x);
+      return promiseCapability['[[Promise]]'];
+    });
+
+    // 25.4.4.6 Promise [ @@create ] ( )
+    // 25.4.4.6.1 AllocatePromise ( constructor )
+    // 25.4.5 Properties of the Promise Prototype Object
+    // 25.4.5.1 Promise.prototype.catch ( onRejected )
+
+    define(Promise.prototype, 'catch', function catch_(onRejected) {
+      var promise = this;
+      return promise.then(undefined, onRejected);
+    });
+
+    // 25.4.5.2 Promise.prototype.constructor
+
+    Promise.prototype.constructor = Promise;
+
+    // 25.4.5.3 Promise.prototype.then ( onFulfilled , onRejected )
+
+    define(Promise.prototype, 'then', function then(onFulfilled, onRejected) {
+      var promise = this;
+      if (!IsPromise(promise)) throw TypeError();
+      if (!IsCallable(onFulfilled)) onFulfilled = 'Identity';
+      if (!IsCallable(onRejected)) onRejected = 'Thrower';
+      var c = promise.constructor;
+      var promiseCapability = NewPromiseCapability(c);
+      var fulfillReaction = { '[[Capabilities]]': promiseCapability,
+                              '[[Handler]]': onFulfilled };
+      var rejectReaction = { '[[Capabilities]]': promiseCapability,
+                             '[[Handler]]': onRejected };
+      if (promise['[[PromiseState]]'] === 'pending') {
+        promise['[[PromiseFulfillReactions]]'].push(fulfillReaction);
+        promise['[[PromiseRejectReactions]]'].push(rejectReaction);
+      } else if (promise['[[PromiseState]]'] === 'fulfilled') {
+        var value = promise['[[PromiseResult]]'];
+        EnqueueJob('PromiseJobs', PromiseReactionJob, [fulfillReaction, value]);
+      } else if (promise['[[PromiseState]]'] === 'rejected') {
+        var reason = promise['[[PromiseResult]]'];
+        EnqueueJob('PromiseJobs', PromiseReactionJob, [rejectReaction, reason]);
+      }
+      return promiseCapability['[[Promise]]'];
+    });
+
+    // 25.4.6 Properties of Promise Instances
+
+    if (!('Promise' in global) || OVERRIDE_NATIVE_FOR_TESTING)
+      global.Promise = Promise;
+
+    // Patch early Promise.cast vs. Promise.resolve implementations
+    if ('cast' in global.Promise) global.Promise.resolve = global.Promise.cast;
+  }());
+
+  // 25.4.5.1 Promise.prototype [ @@toStringTag ]
+  define(Promise.prototype, $$toStringTag, 'Promise');
+
+  // ---------------------------------------
+  // 26 Reflection
+  // ---------------------------------------
+
+  (function() {
+    // 26.1 The Reflect Object
+    if (!('Reflect' in global) || OVERRIDE_NATIVE_FOR_TESTING)
+      global.Reflect = {};
+
+    // 26.1.1 Reflect.apply ( target, thisArgument, argumentsList )
+    define(
+      Reflect, 'apply',
+      function apply(target, thisArgument, argumentsList) {
+        if (!IsCallable(target)) throw TypeError();
+        return Function.prototype.apply.call(target, thisArgument, argumentsList);
+      });
+
+    // 26.1.2 Reflect.construct ( target, argumentsList [, newTarget] )
+    define(
+      Reflect, 'construct',
+      function construct(target, argumentsList) {
+        return __cons(target, argumentsList);
+      });
+
+    // 26.1.3 Reflect.defineProperty ( target, propertyKey, attributes )
+    define(
+      Reflect, 'defineProperty',
+      function defineProperty(target, propertyKey, attributes) {
+        try {
+          Object.defineProperty(target, propertyKey, attributes);
+          return true;
+        } catch (_) {
+          return false;
+        }
+      });
+
+    // 26.1.4 Reflect.deleteProperty ( target, propertyKey )
+    define(
+      Reflect, 'deleteProperty',
+      function deleteProperty(target,name) {
+        try {
+          delete target[name];
+          return !HasOwnProperty(target, name);
+        } catch (_) {
+          return false;
+        }
+      });
+
+    // 26.1.5 Reflect.enumerate ( target )
+    define(
+      Reflect, 'enumerate',
+      function enumerate(target) {
+        target = ToObject(target);
+        var iterator = Enumerate(target);
+        return iterator;
+      });
+
+    // 26.1.6 Reflect.get ( target, propertyKey [ , receiver ])
+    define(
+      Reflect, 'get',
+      function get(target, name, receiver) {
+        target = ToObject(target);
+        name = String(name);
+        receiver = (receiver === undefined) ? target : ToObject(receiver);
+        var desc = getPropertyDescriptor(target, name);
+        if (desc && 'get' in desc)
+          return Function.prototype.call.call(desc['get'], receiver);
+        return target[name];
+      });
+
+    // 26.1.7 Reflect.getOwnPropertyDescriptor ( target, propertyKey )
+    define(
+      Reflect, 'getOwnPropertyDescriptor',
+      Object.getOwnPropertyDescriptor);
+
+    // 26.1.8 Reflect.getPrototypeOf ( target )
+    define(
+      Reflect, 'getPrototypeOf',
+      Object.getPrototypeOf);
+
+    // 26.1.9 Reflect.has ( target, propertyKey )
+    define(
+      Reflect, 'has',
+      function has(target,name) {
+        return String(name) in ToObject(target);
+      });
+
+    // 26.1.10 Reflect.isExtensible (target)
+    define(
+      Reflect, 'isExtensible',
+      Object.isExtensible);
+
+    // 26.1.11 Reflect.ownKeys ( target )
+    define(
+      Reflect, 'ownKeys',
+      function ownKeys(target) {
+        var obj = ToObject(target);
+        return Object.getOwnPropertyNames(obj);
+      });
+
+    // 26.1.12 Reflect.preventExtensions ( target )
+    define(
+      Reflect, 'preventExtensions',
+      function preventExtensions(target) {
+        try { Object.preventExtensions(target); return true; } catch (_) { return false; }
+      });
+
+    // 26.1.13 Reflect.set ( target, propertyKey, V [ , receiver ] )
+    define(
+      Reflect, 'set',
+      function set(target, name, value, receiver) {
+        target = ToObject(target);
+        name = String(name);
+        receiver = (receiver === undefined) ? target : ToObject(receiver);
+        var desc = getPropertyDescriptor(target, name);
+        try {
+          if (desc && 'set' in desc)
+            Function.prototype.call.call(desc['set'], receiver, value);
+          else
+            target[name] = value;
+          return true;
+        } catch (_) {
+          return false;
+        }
+      });
+
+    // 26.1.14 Reflect.setPrototypeOf ( target, proto )
+    define(
+      Reflect, 'setPrototypeOf',
+      function setPrototypeOf(target, proto) {
+        try {
+          target.__proto__ = proto;
+          return Reflect.getPrototypeOf(target) === proto;
+        } catch(_) {
+          return false;
+        }
+      });
+
+  }());
+
+  // ---------------------------------------
+  // 26.2 Proxy Objects
+  // ---------------------------------------
+
+  // Not polyfillable.
+
+}(self));
+
+// This helper is defined outside the main scope so that the use of
+// 'eval' does not taint the scope for minifiers.
+function __cons(t, a) {
+  return eval('new t(' + a.map(function(_, i) { return 'a[' + i + ']'; }).join(',') + ')');
+}
+</script>
+        <script>(function (root) {
+   "use strict";
+
+/***** unorm.js *****/
+
+/*
+ * UnicodeNormalizer 1.0.0
+ * Copyright (c) 2008 Matsuza
+ * Dual licensed under the MIT (MIT-LICENSE.txt) and GPL (GPL-LICENSE.txt) licenses.
+ * $Date: 2008-06-05 16:44:17 +0200 (Thu, 05 Jun 2008) $
+ * $Rev: 13309 $
+ */
+
+   var DEFAULT_FEATURE = [null, 0, {}];
+   var CACHE_THRESHOLD = 10;
+   var SBase = 0xAC00, LBase = 0x1100, VBase = 0x1161, TBase = 0x11A7, LCount = 19, VCount = 21, TCount = 28;
+   var NCount = VCount * TCount; // 588
+   var SCount = LCount * NCount; // 11172
+
+   var UChar = function(cp, feature){
+      this.codepoint = cp;
+      this.feature = feature;
+   };
+
+   // Strategies
+   var cache = {};
+   var cacheCounter = [];
+   for (var i = 0; i <= 0xFF; ++i){
+      cacheCounter[i] = 0;
+   }
+
+   function fromCache(next, cp, needFeature){
+      var ret = cache[cp];
+      if(!ret){
+         ret = next(cp, needFeature);
+         if(!!ret.feature && ++cacheCounter[(cp >> 8) & 0xFF] > CACHE_THRESHOLD){
+            cache[cp] = ret;
+         }
+      }
+      return ret;
+   }
+
+   function fromData(next, cp, needFeature){
+      var hash = cp & 0xFF00;
+      var dunit = UChar.udata[hash] || {};
+      var f = dunit[cp];
+      return f ? new UChar(cp, f) : new UChar(cp, DEFAULT_FEATURE);
+   }
+   function fromCpOnly(next, cp, needFeature){
+      return !!needFeature ? next(cp, needFeature) : new UChar(cp, null);
+   }
+   function fromRuleBasedJamo(next, cp, needFeature){
+      var j;
+      if(cp < LBase || (LBase + LCount <= cp && cp < SBase) || (SBase + SCount < cp)){
+         return next(cp, needFeature);
+      }
+      if(LBase <= cp && cp < LBase + LCount){
+         var c = {};
+         var base = (cp - LBase) * VCount;
+         for (j = 0; j < VCount; ++j){
+            c[VBase + j] = SBase + TCount * (j + base);
+         }
+         return new UChar(cp, [,,c]);
+      }
+
+      var SIndex = cp - SBase;
+      var TIndex = SIndex % TCount;
+      var feature = [];
+      if(TIndex !== 0){
+         feature[0] = [SBase + SIndex - TIndex, TBase + TIndex];
+      } else {
+         feature[0] = [LBase + Math.floor(SIndex / NCount), VBase + Math.floor((SIndex % NCount) / TCount)];
+         feature[2] = {};
+         for (j = 1; j < TCount; ++j){
+            feature[2][TBase + j] = cp + j;
+         }
+      }
+      return new UChar(cp, feature);
+   }
+   function fromCpFilter(next, cp, needFeature){
+      return cp < 60 || 13311 < cp && cp < 42607 ? new UChar(cp, DEFAULT_FEATURE) : next(cp, needFeature);
+   }
+
+   var strategies = [fromCpFilter, fromCache, fromCpOnly, fromRuleBasedJamo, fromData];
+
+   UChar.fromCharCode = strategies.reduceRight(function (next, strategy) {
+      return function (cp, needFeature) {
+         return strategy(next, cp, needFeature);
+      };
+   }, null);
+
+   UChar.isHighSurrogate = function(cp){
+      return cp >= 0xD800 && cp <= 0xDBFF;
+   };
+   UChar.isLowSurrogate = function(cp){
+      return cp >= 0xDC00 && cp <= 0xDFFF;
+   };
+
+   UChar.prototype.prepFeature = function(){
+      if(!this.feature){
+         this.feature = UChar.fromCharCode(this.codepoint, true).feature;
+      }
+   };
+
+   UChar.prototype.toString = function(){
+      if(this.codepoint < 0x10000){
+         return String.fromCharCode(this.codepoint);
+      } else {
+         var x = this.codepoint - 0x10000;
+         return String.fromCharCode(Math.floor(x / 0x400) + 0xD800, x % 0x400 + 0xDC00);
+      }
+   };
+
+   UChar.prototype.getDecomp = function(){
+      this.prepFeature();
+      return this.feature[0] || null;
+   };
+
+   UChar.prototype.isCompatibility = function(){
+      this.prepFeature();
+      return !!this.feature[1] && (this.feature[1] & (1 << 8));
+   };
+   UChar.prototype.isExclude = function(){
+      this.prepFeature();
+      return !!this.feature[1] && (this.feature[1] & (1 << 9));
+   };
+   UChar.prototype.getCanonicalClass = function(){
+      this.prepFeature();
+      return !!this.feature[1] ? (this.feature[1] & 0xff) : 0;
+   };
+   UChar.prototype.getComposite = function(following){
+      this.prepFeature();
+      if(!this.feature[2]){
+         return null;
+      }
+      var cp = this.feature[2][following.codepoint];
+      return cp ? UChar.fromCharCode(cp) : null;
+   };
+
+   var UCharIterator = function(str){
+      this.str = str;
+      this.cursor = 0;
+   };
+   UCharIterator.prototype.next = function(){
+      if(!!this.str && this.cursor < this.str.length){
+         var cp = this.str.charCodeAt(this.cursor++);
+         var d;
+         if(UChar.isHighSurrogate(cp) && this.cursor < this.str.length && UChar.isLowSurrogate((d = this.str.charCodeAt(this.cursor)))){
+            cp = (cp - 0xD800) * 0x400 + (d -0xDC00) + 0x10000;
+            ++this.cursor;
+         }
+         return UChar.fromCharCode(cp);
+      } else {
+         this.str = null;
+         return null;
+      }
+   };
+
+   var RecursDecompIterator = function(it, cano){
+      this.it = it;
+      this.canonical = cano;
+      this.resBuf = [];
+   };
+
+   RecursDecompIterator.prototype.next = function(){
+      function recursiveDecomp(cano, uchar){
+         var decomp = uchar.getDecomp();
+         if(!!decomp && !(cano && uchar.isCompatibility())){
+            var ret = [];
+            for(var i = 0; i < decomp.length; ++i){
+               var a = recursiveDecomp(cano, UChar.fromCharCode(decomp[i]));
+                ret = ret.concat(a);
+            }
+            return ret;
+         } else {
+            return [uchar];
+         }
+      }
+      if(this.resBuf.length === 0){
+         var uchar = this.it.next();
+         if(!uchar){
+            return null;
+         }
+         this.resBuf = recursiveDecomp(this.canonical, uchar);
+      }
+      return this.resBuf.shift();
+   };
+
+   var DecompIterator = function(it){
+      this.it = it;
+      this.resBuf = [];
+   };
+
+   DecompIterator.prototype.next = function(){
+      var cc;
+      if(this.resBuf.length === 0){
+         do{
+            var uchar = this.it.next();
+            if(!uchar){
+               break;
+            }
+            cc = uchar.getCanonicalClass();
+            var inspt = this.resBuf.length;
+            if(cc !== 0){
+               for(; inspt > 0; --inspt){
+                  var uchar2 = this.resBuf[inspt - 1];
+                  var cc2 = uchar2.getCanonicalClass();
+                  if(cc2 <= cc){
+                     break;
+                  }
+               }
+            }
+            this.resBuf.splice(inspt, 0, uchar);
+         } while(cc !== 0);
+      }
+      return this.resBuf.shift();
+   };
+
+   var CompIterator = function(it){
+      this.it = it;
+      this.procBuf = [];
+      this.resBuf = [];
+      this.lastClass = null;
+   };
+
+   CompIterator.prototype.next = function(){
+      while(this.resBuf.length === 0){
+         var uchar = this.it.next();
+         if(!uchar){
+            this.resBuf = this.procBuf;
+            this.procBuf = [];
+            break;
+         }
+         if(this.procBuf.length === 0){
+            this.lastClass = uchar.getCanonicalClass();
+            this.procBuf.push(uchar);
+         } else {
+            var starter = this.procBuf[0];
+            var composite = starter.getComposite(uchar);
+            var cc = uchar.getCanonicalClass();
+            if(!!composite && (this.lastClass < cc || this.lastClass === 0)){
+               this.procBuf[0] = composite;
+            } else {
+               if(cc === 0){
+                  this.resBuf = this.procBuf;
+                  this.procBuf = [];
+               }
+               this.lastClass = cc;
+               this.procBuf.push(uchar);
+            }
+         }
+      }
+      return this.resBuf.shift();
+   };
+
+   var createIterator = function(mode, str){
+      switch(mode){
+         case "NFD":
+            return new DecompIterator(new RecursDecompIterator(new UCharIterator(str), true));
+         case "NFKD":
+            return new DecompIterator(new RecursDecompIterator(new UCharIterator(str), false));
+         case "NFC":
+            return new CompIterator(new DecompIterator(new RecursDecompIterator(new UCharIterator(str), true)));
+         case "NFKC":
+            return new CompIterator(new DecompIterator(new RecursDecompIterator(new UCharIterator(str), false)));
+      }
+      throw mode + " is invalid";
+   };
+   var normalize = function(mode, str){
+      var it = createIterator(mode, str);
+      var ret = "";
+      var uchar;
+      while(!!(uchar = it.next())){
+         ret += uchar.toString();
+      }
+      return ret;
+   };
+
+   /* API functions */
+   function nfd(str){
+      return normalize("NFD", str);
+   }
+
+   function nfkd(str){
+      return normalize("NFKD", str);
+   }
+
+   function nfc(str){
+      return normalize("NFC", str);
+   }
+
+   function nfkc(str){
+      return normalize("NFKC", str);
+   }
+
+/* Unicode data */
+UChar.udata={
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+
+};
+
+   /***** Module to export */
+   var unorm = {
+      nfc: nfc,
+      nfd: nfd,
+      nfkc: nfkc,
+      nfkd: nfkd
+   };
+
+   /*globals module:true,define:true*/
+
+   // CommonJS
+   if (typeof module === "object") {
+      module.exports = unorm;
+
+   // AMD
+   } else if (typeof define === "function" && define.amd) {
+      define("unorm", function () {
+         return unorm;
+      });
+
+   // Global
+   } else {
+      root.unorm = unorm;
+   }
+
+   /***** Export as shim for String::normalize method *****/
+   /*
+      http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts#november_8_2013_draft_rev_21
+
+      21.1.3.12 String.prototype.normalize(form="NFC")
+      When the normalize method is called with one argument form, the following steps are taken:
+
+      1. Let O be CheckObjectCoercible(this value).
+      2. Let S be ToString(O).
+      3. ReturnIfAbrupt(S).
+      4. If form is not provided or undefined let form be "NFC".
+      5. Let f be ToString(form).
+      6. ReturnIfAbrupt(f).
+      7. If f is not one of "NFC", "NFD", "NFKC", or "NFKD", then throw a RangeError Exception.
+      8. Let ns be the String value is the result of normalizing S into the normalization form named by f as specified in Unicode Standard Annex #15, UnicodeNormalizatoin Forms.
+      9. Return ns.
+
+      The length property of the normalize method is 0.
+
+      *NOTE* The normalize function is intentionally generic; it does not require that its this value be a String object. Therefore it can be transferred to other kinds of objects for use as a method.
+   */
+    unorm.shimApplied = false;
+
+   if (!String.prototype.normalize) {
+      String.prototype.normalize = function(form) {
+         var str = "" + this;
+         form =  form === undefined ? "NFC" : form;
+
+         if (form === "NFC") {
+            return unorm.nfc(str);
+         } else if (form === "NFD") {
+            return unorm.nfd(str);
+         } else if (form === "NFKC") {
+            return unorm.nfkc(str);
+         } else if (form === "NFKD") {
+            return unorm.nfkd(str);
+         } else {
+            throw new RangeError("Invalid normalization form: " + form);
+         }
+      };
+
+      unorm.shimApplied = true;
+   }
+}(this));
+</script>
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+        <script>(function() {
+  'use strict';
+
+  /**
+   * Extend an Object with another Object's properties.
+   *
+   * The source objects are specified as additional arguments.
+   *
+   * @param dst Object the object to extend.
+   *
+   * @return Object the final object.
+   */
+  var _extend = function(dst) {
+    var sources = Array.prototype.slice.call(arguments, 1);
+    for (var i=0; i<sources.length; ++i) {
+      var src = sources[i];
+      for (var p in src) {
+        if (src.hasOwnProperty(p)) dst[p] = src[p];
+      }
+    }
+    return dst;
+  };
+
+
+  /**
+   * Defer execution of given function.
+   * @param  {Function} func
+   */
+  var _defer = function(func) {
+    if (typeof setImmediate === 'function') {
+      return setImmediate(func);
+    } else {
+      return setTimeout(func, 0);
+    }
+  };
+
+  /**
+   * Based on the algorithm at http://en.wikipedia.org/wiki/Levenshtein_distance.
+   */
+  var Levenshtein = {
+    /**
+     * Calculate levenshtein distance of the two strings.
+     *
+     * @param str1 String the first string.
+     * @param str2 String the second string.
+     * @return Integer the levenshtein distance (0 and above).
+     */
+    get: function(str1, str2) {
+      // base cases
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+      if (str1.length === 0) return str2.length;
+      if (str2.length === 0) return str1.length;
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+      // two rows
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+      // initialise previous row
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+      }
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+      // calculate current row distance from previous row
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+
+        for (j=0; j<str2.length; ++j) {
+          curCol = nextCol;
+
+          // substution
+          nextCol = prevRow[j] + ( (str1.charAt(i) === str2.charAt(j)) ? 0 : 1 );
+          // insertion
+          tmp = curCol + 1;
+          if (nextCol > tmp) {
+            nextCol = tmp;
+          }
+          // deletion
+          tmp = prevRow[j + 1] + 1;
+          if (nextCol > tmp) {
+            nextCol = tmp;
+          }
+
+          // copy current col value into previous (in preparation for next iteration)
+          prevRow[j] = curCol;
+        }
+
+        // copy last col value into previous (in preparation for next iteration)
+        prevRow[j] = nextCol;
+      }
+
+      return nextCol;
+    },
+
+    /**
+     * Asynchronously calculate levenshtein distance of the two strings.
+     *
+     * @param str1 String the first string.
+     * @param str2 String the second string.
+     * @param cb Function callback function with signature: function(Error err, int distance)
+     * @param [options] Object additional options.
+     * @param [options.progress] Function progress callback with signature: function(percentComplete)
+     */
+    getAsync: function(str1, str2, cb, options) {
+      options = _extend({}, {
+        progress: null
+      }, options);
+
+      // base cases
+      if (str1 === str2) return cb(null, 0);
+      if (str1.length === 0) return cb(null, str2.length);
+      if (str2.length === 0) return cb(null, str1.length);
+
+      // two rows
+      var prevRow  = new Array(str2.length + 1),
+          curCol, nextCol,
+          i, j, tmp,
+          startTime, currentTime;
+
+      // initialise previous row
+      for (i=0; i<prevRow.length; ++i) {
+        prevRow[i] = i;
+      }
+
+      nextCol = 1;
+      i = 0;
+      j = -1;
+
+      var __calculate = function() {
+        // reset timer
+        startTime = new Date().valueOf();
+        currentTime = startTime;
+
+        // keep going until one second has elapsed
+        while (currentTime - startTime < 1000) {
+          // reached end of current row?
+          if (str2.length <= (++j)) {
+            // copy current into previous (in preparation for next iteration)
+            prevRow[j] = nextCol;
+
+            // if already done all chars
+            if (str1.length <= (++i)) {
+              return cb(null, nextCol);
+            }
+            // else if we have more left to do
+            else {
+              nextCol = i + 1;
+              j = 0;
+            }
+          }
+
+          // calculation
+          curCol = nextCol;
+
+          // substution
+          nextCol = prevRow[j] + ( (str1.charAt(i) === str2.charAt(j)) ? 0 : 1 );
+          // insertion
+          tmp = curCol + 1;
+          if (nextCol > tmp) {
+            nextCol = tmp;
+          }
+          // deletion
+          tmp = prevRow[j + 1] + 1;
+          if (nextCol > tmp) {
+            nextCol = tmp;
+          }
+
+          // copy current into previous (in preparation for next iteration)
+          prevRow[j] = curCol;
+
+          // get current time
+          currentTime = new Date().valueOf();
+        }
+
+        // send a progress update?
+        if (null !== options.progress) {
+          try {
+            options.progress.call(null, (i * 100.0/ str1.length));
+          } catch (err) {
+            return cb('Progress callback: ' + err.toString());
+          }
+        }
+
+        // next iteration
+        _defer(__calculate);
+      };
+
+      __calculate();
+    }
+
+  };
+
+  // amd
+  if (typeof define !== "undefined" && define !== null && define.amd) {
+    define(function() {
+      return Levenshtein;
+    });
+  }
+  // commonjs
+  else if (typeof module !== "undefined" && module !== null && typeof exports !== "undefined" && module.exports === exports) {
+    module.exports = Levenshtein;
+  }
+  // web worker
+  else if (typeof self !== "undefined" && typeof self.postMessage === 'function' && typeof self.importScripts === 'function') {
+    self.Levenshtein = Levenshtein;
+  }
+  // browser main thread
+  else if (typeof window !== "undefined" && window !== null) {
+    window.Levenshtein = Levenshtein;
+  }
+}());
+
+</script>
+        <script>(function(r){r.fn.qrcode=function(h){var s;function u(a){this.mode=s;this.data=a}function o(a,c){this.typeNumber=a;this.errorCorrectLevel=c;this.modules=null;this.moduleCount=0;this.dataCache=null;this.dataList=[]}function q(a,c){if(void 0==a.length)throw Error(a.length+"/"+c);for(var d=0;d<a.length&&0==a[d];)d++;this.num=Array(a.length-d+c);for(var b=0;b<a.length-d;b++)this.num[b]=a[b+d]}function p(a,c){this.totalCount=a;this.dataCount=c}function t(){this.buffer=[];this.length=0}u.prototype={getLength:function(){return this.data.length},
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+45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]];p.getRSBlocks=function(a,c){var d=p.getRsBlockTable(a,c);if(void 0==d)throw Error("bad rs block @ typeNumber:"+a+"/errorCorrectLevel:"+c);for(var b=d.length/3,e=[],f=0;f<b;f++)for(var h=d[3*f+0],g=d[3*f+1],j=d[3*f+2],l=0;l<h;l++)e.push(new p(g,j));return e};p.getRsBlockTable=function(a,c){switch(c){case 1:return p.RS_BLOCK_TABLE[4*(a-1)+0];case 0:return p.RS_BLOCK_TABLE[4*(a-1)+1];case 3:return p.RS_BLOCK_TABLE[4*
+(a-1)+2];case 2:return p.RS_BLOCK_TABLE[4*(a-1)+3]}};t.prototype={get:function(a){return 1==(this.buffer[Math.floor(a/8)]>>>7-a%8&1)},put:function(a,c){for(var d=0;d<c;d++)this.putBit(1==(a>>>c-d-1&1))},getLengthInBits:function(){return this.length},putBit:function(a){var c=Math.floor(this.length/8);this.buffer.length<=c&&this.buffer.push(0);a&&(this.buffer[c]|=128>>>this.length%8);this.length++}};"string"===typeof h&&(h={text:h});h=r.extend({},{render:"canvas",width:256,height:256,typeNumber:-1,
+correctLevel:2,background:"#ffffff",foreground:"#000000"},h);return this.each(function(){var a;if("canvas"==h.render){a=new o(h.typeNumber,h.correctLevel);a.addData(h.text);a.make();var c=document.createElement("canvas");c.width=h.width;c.height=h.height;for(var d=c.getContext("2d"),b=h.width/a.getModuleCount(),e=h.height/a.getModuleCount(),f=0;f<a.getModuleCount();f++)for(var i=0;i<a.getModuleCount();i++){d.fillStyle=a.isDark(f,i)?h.foreground:h.background;var g=Math.ceil((i+1)*b)-Math.floor(i*b),
+j=Math.ceil((f+1)*b)-Math.floor(f*b);d.fillRect(Math.round(i*b),Math.round(f*e),g,j)}}else{a=new o(h.typeNumber,h.correctLevel);a.addData(h.text);a.make();c=r("<table></table>").css("width",h.width+"px").css("height",h.height+"px").css("border","0px").css("border-collapse","collapse").css("background-color",h.background);d=h.width/a.getModuleCount();b=h.height/a.getModuleCount();for(e=0;e<a.getModuleCount();e++){f=r("<tr></tr>").css("height",b+"px").appendTo(c);for(i=0;i<a.getModuleCount();i++)r("<td></td>").css("width",
+d+"px").css("background-color",a.isDark(e,i)?h.foreground:h.background).appendTo(f)}}a=c;$(a).appendTo(this)})}})($);
+</script>
+        <script>(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.bitcoin = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+// (public) Constructor
+function BigInteger(a, b, c) {
+  if (!(this instanceof BigInteger))
+    return new BigInteger(a, b, c)
+
+  if (a != null) {
+    if ("number" == typeof a) this.fromNumber(a, b, c)
+    else if (b == null && "string" != typeof a) this.fromString(a, 256)
+    else this.fromString(a, b)
+  }
+}
+
+var proto = BigInteger.prototype
+
+// duck-typed isBigInteger
+proto.__bigi = require('../package.json').version
+BigInteger.isBigInteger = function (obj, check_ver) {
+  return obj && obj.__bigi && (!check_ver || obj.__bigi === proto.__bigi)
+}
+
+// Bits per digit
+var dbits
+
+// am: Compute w_j += (x*this_i), propagate carries,
+// c is initial carry, returns final carry.
+// c < 3*dvalue, x < 2*dvalue, this_i < dvalue
+// We need to select the fastest one that works in this environment.
+
+// am1: use a single mult and divide to get the high bits,
+// max digit bits should be 26 because
+// max internal value = 2*dvalue^2-2*dvalue (< 2^53)
+function am1(i, x, w, j, c, n) {
+  while (--n >= 0) {
+    var v = x * this[i++] + w[j] + c
+    c = Math.floor(v / 0x4000000)
+    w[j++] = v & 0x3ffffff
+  }
+  return c
+}
+// am2 avoids a big mult-and-extract completely.
+// Max digit bits should be <= 30 because we do bitwise ops
+// on values up to 2*hdvalue^2-hdvalue-1 (< 2^31)
+function am2(i, x, w, j, c, n) {
+  var xl = x & 0x7fff,
+    xh = x >> 15
+  while (--n >= 0) {
+    var l = this[i] & 0x7fff
+    var h = this[i++] >> 15
+    var m = xh * l + h * xl
+    l = xl * l + ((m & 0x7fff) << 15) + w[j] + (c & 0x3fffffff)
+    c = (l >>> 30) + (m >>> 15) + xh * h + (c >>> 30)
+    w[j++] = l & 0x3fffffff
+  }
+  return c
+}
+// Alternately, set max digit bits to 28 since some
+// browsers slow down when dealing with 32-bit numbers.
+function am3(i, x, w, j, c, n) {
+  var xl = x & 0x3fff,
+    xh = x >> 14
+  while (--n >= 0) {
+    var l = this[i] & 0x3fff
+    var h = this[i++] >> 14
+    var m = xh * l + h * xl
+    l = xl * l + ((m & 0x3fff) << 14) + w[j] + c
+    c = (l >> 28) + (m >> 14) + xh * h
+    w[j++] = l & 0xfffffff
+  }
+  return c
+}
+
+// wtf?
+BigInteger.prototype.am = am1
+dbits = 26
+
+BigInteger.prototype.DB = dbits
+BigInteger.prototype.DM = ((1 << dbits) - 1)
+var DV = BigInteger.prototype.DV = (1 << dbits)
+
+var BI_FP = 52
+BigInteger.prototype.FV = Math.pow(2, BI_FP)
+BigInteger.prototype.F1 = BI_FP - dbits
+BigInteger.prototype.F2 = 2 * dbits - BI_FP
+
+// Digit conversions
+var BI_RM = "0123456789abcdefghijklmnopqrstuvwxyz"
+var BI_RC = new Array()
+var rr, vv
+rr = "0".charCodeAt(0)
+for (vv = 0; vv <= 9; ++vv) BI_RC[rr++] = vv
+rr = "a".charCodeAt(0)
+for (vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv
+rr = "A".charCodeAt(0)
+for (vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv
+
+function int2char(n) {
+  return BI_RM.charAt(n)
+}
+
+function intAt(s, i) {
+  var c = BI_RC[s.charCodeAt(i)]
+  return (c == null) ? -1 : c
+}
+
+// (protected) copy this to r
+function bnpCopyTo(r) {
+  for (var i = this.t - 1; i >= 0; --i) r[i] = this[i]
+  r.t = this.t
+  r.s = this.s
+}
+
+// (protected) set from integer value x, -DV <= x < DV
+function bnpFromInt(x) {
+  this.t = 1
+  this.s = (x < 0) ? -1 : 0
+  if (x > 0) this[0] = x
+  else if (x < -1) this[0] = x + DV
+  else this.t = 0
+}
+
+// return bigint initialized to value
+function nbv(i) {
+  var r = new BigInteger()
+  r.fromInt(i)
+  return r
+}
+
+// (protected) set from string and radix
+function bnpFromString(s, b) {
+  var self = this
+
+  var k
+  if (b == 16) k = 4
+  else if (b == 8) k = 3
+  else if (b == 256) k = 8; // byte array
+  else if (b == 2) k = 1
+  else if (b == 32) k = 5
+  else if (b == 4) k = 2
+  else {
+    self.fromRadix(s, b)
+    return
+  }
+  self.t = 0
+  self.s = 0
+  var i = s.length,
+    mi = false,
+    sh = 0
+  while (--i >= 0) {
+    var x = (k == 8) ? s[i] & 0xff : intAt(s, i)
+    if (x < 0) {
+      if (s.charAt(i) == "-") mi = true
+      continue
+    }
+    mi = false
+    if (sh == 0)
+      self[self.t++] = x
+    else if (sh + k > self.DB) {
+      self[self.t - 1] |= (x & ((1 << (self.DB - sh)) - 1)) << sh
+      self[self.t++] = (x >> (self.DB - sh))
+    } else
+      self[self.t - 1] |= x << sh
+    sh += k
+    if (sh >= self.DB) sh -= self.DB
+  }
+  if (k == 8 && (s[0] & 0x80) != 0) {
+    self.s = -1
+    if (sh > 0) self[self.t - 1] |= ((1 << (self.DB - sh)) - 1) << sh
+  }
+  self.clamp()
+  if (mi) BigInteger.ZERO.subTo(self, self)
+}
+
+// (protected) clamp off excess high words
+function bnpClamp() {
+  var c = this.s & this.DM
+  while (this.t > 0 && this[this.t - 1] == c)--this.t
+}
+
+// (public) return string representation in given radix
+function bnToString(b) {
+  var self = this
+  if (self.s < 0) return "-" + self.negate()
+    .toString(b)
+  var k
+  if (b == 16) k = 4
+  else if (b == 8) k = 3
+  else if (b == 2) k = 1
+  else if (b == 32) k = 5
+  else if (b == 4) k = 2
+  else return self.toRadix(b)
+  var km = (1 << k) - 1,
+    d, m = false,
+    r = "",
+    i = self.t
+  var p = self.DB - (i * self.DB) % k
+  if (i-- > 0) {
+    if (p < self.DB && (d = self[i] >> p) > 0) {
+      m = true
+      r = int2char(d)
+    }
+    while (i >= 0) {
+      if (p < k) {
+        d = (self[i] & ((1 << p) - 1)) << (k - p)
+        d |= self[--i] >> (p += self.DB - k)
+      } else {
+        d = (self[i] >> (p -= k)) & km
+        if (p <= 0) {
+          p += self.DB
+          --i
+        }
+      }
+      if (d > 0) m = true
+      if (m) r += int2char(d)
+    }
+  }
+  return m ? r : "0"
+}
+
+// (public) -this
+function bnNegate() {
+  var r = new BigInteger()
   BigInteger.ZERO.subTo(this, r)
   return r
 }
 
-// (public) |this|
-function bnAbs() {
-  return (this.s < 0) ? this.negate() : this
+// (public) |this|
+function bnAbs() {
+  return (this.s < 0) ? this.negate() : this
+}
+
+// (public) return + if this > a, - if this < a, 0 if equal
+function bnCompareTo(a) {
+  var r = this.s - a.s
+  if (r != 0) return r
+  var i = this.t
+  r = i - a.t
+  if (r != 0) return (this.s < 0) ? -r : r
+  while (--i >= 0)
+    if ((r = this[i] - a[i]) != 0) return r
+  return 0
+}
+
+// returns bit length of the integer x
+function nbits(x) {
+  var r = 1,
+    t
+  if ((t = x >>> 16) != 0) {
+    x = t
+    r += 16
+  }
+  if ((t = x >> 8) != 0) {
+    x = t
+    r += 8
+  }
+  if ((t = x >> 4) != 0) {
+    x = t
+    r += 4
+  }
+  if ((t = x >> 2) != 0) {
+    x = t
+    r += 2
+  }
+  if ((t = x >> 1) != 0) {
+    x = t
+    r += 1
+  }
+  return r
+}
+
+// (public) return the number of bits in "this"
+function bnBitLength() {
+  if (this.t <= 0) return 0
+  return this.DB * (this.t - 1) + nbits(this[this.t - 1] ^ (this.s & this.DM))
+}
+
+// (public) return the number of bytes in "this"
+function bnByteLength() {
+  return this.bitLength() >> 3
+}
+
+// (protected) r = this << n*DB
+function bnpDLShiftTo(n, r) {
+  var i
+  for (i = this.t - 1; i >= 0; --i) r[i + n] = this[i]
+  for (i = n - 1; i >= 0; --i) r[i] = 0
+  r.t = this.t + n
+  r.s = this.s
+}
+
+// (protected) r = this >> n*DB
+function bnpDRShiftTo(n, r) {
+  for (var i = n; i < this.t; ++i) r[i - n] = this[i]
+  r.t = Math.max(this.t - n, 0)
+  r.s = this.s
+}
+
+// (protected) r = this << n
+function bnpLShiftTo(n, r) {
+  var self = this
+  var bs = n % self.DB
+  var cbs = self.DB - bs
+  var bm = (1 << cbs) - 1
+  var ds = Math.floor(n / self.DB),
+    c = (self.s << bs) & self.DM,
+    i
+  for (i = self.t - 1; i >= 0; --i) {
+    r[i + ds + 1] = (self[i] >> cbs) | c
+    c = (self[i] & bm) << bs
+  }
+  for (i = ds - 1; i >= 0; --i) r[i] = 0
+  r[ds] = c
+  r.t = self.t + ds + 1
+  r.s = self.s
+  r.clamp()
+}
+
+// (protected) r = this >> n
+function bnpRShiftTo(n, r) {
+  var self = this
+  r.s = self.s
+  var ds = Math.floor(n / self.DB)
+  if (ds >= self.t) {
+    r.t = 0
+    return
+  }
+  var bs = n % self.DB
+  var cbs = self.DB - bs
+  var bm = (1 << bs) - 1
+  r[0] = self[ds] >> bs
+  for (var i = ds + 1; i < self.t; ++i) {
+    r[i - ds - 1] |= (self[i] & bm) << cbs
+    r[i - ds] = self[i] >> bs
+  }
+  if (bs > 0) r[self.t - ds - 1] |= (self.s & bm) << cbs
+  r.t = self.t - ds
+  r.clamp()
+}
+
+// (protected) r = this - a
+function bnpSubTo(a, r) {
+  var self = this
+  var i = 0,
+    c = 0,
+    m = Math.min(a.t, self.t)
+  while (i < m) {
+    c += self[i] - a[i]
+    r[i++] = c & self.DM
+    c >>= self.DB
+  }
+  if (a.t < self.t) {
+    c -= a.s
+    while (i < self.t) {
+      c += self[i]
+      r[i++] = c & self.DM
+      c >>= self.DB
+    }
+    c += self.s
+  } else {
+    c += self.s
+    while (i < a.t) {
+      c -= a[i]
+      r[i++] = c & self.DM
+      c >>= self.DB
+    }
+    c -= a.s
+  }
+  r.s = (c < 0) ? -1 : 0
+  if (c < -1) r[i++] = self.DV + c
+  else if (c > 0) r[i++] = c
+  r.t = i
+  r.clamp()
+}
+
+// (protected) r = this * a, r != this,a (HAC 14.12)
+// "this" should be the larger one if appropriate.
+function bnpMultiplyTo(a, r) {
+  var x = this.abs(),
+    y = a.abs()
+  var i = x.t
+  r.t = i + y.t
+  while (--i >= 0) r[i] = 0
+  for (i = 0; i < y.t; ++i) r[i + x.t] = x.am(0, y[i], r, i, 0, x.t)
+  r.s = 0
+  r.clamp()
+  if (this.s != a.s) BigInteger.ZERO.subTo(r, r)
+}
+
+// (protected) r = this^2, r != this (HAC 14.16)
+function bnpSquareTo(r) {
+  var x = this.abs()
+  var i = r.t = 2 * x.t
+  while (--i >= 0) r[i] = 0
+  for (i = 0; i < x.t - 1; ++i) {
+    var c = x.am(i, x[i], r, 2 * i, 0, 1)
+    if ((r[i + x.t] += x.am(i + 1, 2 * x[i], r, 2 * i + 1, c, x.t - i - 1)) >= x.DV) {
+      r[i + x.t] -= x.DV
+      r[i + x.t + 1] = 1
+    }
+  }
+  if (r.t > 0) r[r.t - 1] += x.am(i, x[i], r, 2 * i, 0, 1)
+  r.s = 0
+  r.clamp()
+}
+
+// (protected) divide this by m, quotient and remainder to q, r (HAC 14.20)
+// r != q, this != m.  q or r may be null.
+function bnpDivRemTo(m, q, r) {
+  var self = this
+  var pm = m.abs()
+  if (pm.t <= 0) return
+  var pt = self.abs()
+  if (pt.t < pm.t) {
+    if (q != null) q.fromInt(0)
+    if (r != null) self.copyTo(r)
+    return
+  }
+  if (r == null) r = new BigInteger()
+  var y = new BigInteger(),
+    ts = self.s,
+    ms = m.s
+  var nsh = self.DB - nbits(pm[pm.t - 1]); // normalize modulus
+  if (nsh > 0) {
+    pm.lShiftTo(nsh, y)
+    pt.lShiftTo(nsh, r)
+  } else {
+    pm.copyTo(y)
+    pt.copyTo(r)
+  }
+  var ys = y.t
+  var y0 = y[ys - 1]
+  if (y0 == 0) return
+  var yt = y0 * (1 << self.F1) + ((ys > 1) ? y[ys - 2] >> self.F2 : 0)
+  var d1 = self.FV / yt,
+    d2 = (1 << self.F1) / yt,
+    e = 1 << self.F2
+  var i = r.t,
+    j = i - ys,
+    t = (q == null) ? new BigInteger() : q
+  y.dlShiftTo(j, t)
+  if (r.compareTo(t) >= 0) {
+    r[r.t++] = 1
+    r.subTo(t, r)
+  }
+  BigInteger.ONE.dlShiftTo(ys, t)
+  t.subTo(y, y); // "negative" y so we can replace sub with am later
+  while (y.t < ys) y[y.t++] = 0
+  while (--j >= 0) {
+    // Estimate quotient digit
+    var qd = (r[--i] == y0) ? self.DM : Math.floor(r[i] * d1 + (r[i - 1] + e) * d2)
+    if ((r[i] += y.am(0, qd, r, j, 0, ys)) < qd) { // Try it out
+      y.dlShiftTo(j, t)
+      r.subTo(t, r)
+      while (r[i] < --qd) r.subTo(t, r)
+    }
+  }
+  if (q != null) {
+    r.drShiftTo(ys, q)
+    if (ts != ms) BigInteger.ZERO.subTo(q, q)
+  }
+  r.t = ys
+  r.clamp()
+  if (nsh > 0) r.rShiftTo(nsh, r); // Denormalize remainder
+  if (ts < 0) BigInteger.ZERO.subTo(r, r)
+}
+
+// (public) this mod a
+function bnMod(a) {
+  var r = new BigInteger()
+  this.abs()
+    .divRemTo(a, null, r)
+  if (this.s < 0 && r.compareTo(BigInteger.ZERO) > 0) a.subTo(r, r)
+  return r
+}
+
+// Modular reduction using "classic" algorithm
+function Classic(m) {
+  this.m = m
+}
+
+function cConvert(x) {
+  if (x.s < 0 || x.compareTo(this.m) >= 0) return x.mod(this.m)
+  else return x
+}
+
+function cRevert(x) {
+  return x
+}
+
+function cReduce(x) {
+  x.divRemTo(this.m, null, x)
+}
+
+function cMulTo(x, y, r) {
+  x.multiplyTo(y, r)
+  this.reduce(r)
+}
+
+function cSqrTo(x, r) {
+  x.squareTo(r)
+  this.reduce(r)
+}
+
+Classic.prototype.convert = cConvert
+Classic.prototype.revert = cRevert
+Classic.prototype.reduce = cReduce
+Classic.prototype.mulTo = cMulTo
+Classic.prototype.sqrTo = cSqrTo
+
+// (protected) return "-1/this % 2^DB"; useful for Mont. reduction
+// justification:
+//         xy == 1 (mod m)
+//         xy =  1+km
+//   xy(2-xy) = (1+km)(1-km)
+// x[y(2-xy)] = 1-k^2m^2
+// x[y(2-xy)] == 1 (mod m^2)
+// if y is 1/x mod m, then y(2-xy) is 1/x mod m^2
+// should reduce x and y(2-xy) by m^2 at each step to keep size bounded.
+// JS multiply "overflows" differently from C/C++, so care is needed here.
+function bnpInvDigit() {
+  if (this.t < 1) return 0
+  var x = this[0]
+  if ((x & 1) == 0) return 0
+  var y = x & 3; // y == 1/x mod 2^2
+  y = (y * (2 - (x & 0xf) * y)) & 0xf; // y == 1/x mod 2^4
+  y = (y * (2 - (x & 0xff) * y)) & 0xff; // y == 1/x mod 2^8
+  y = (y * (2 - (((x & 0xffff) * y) & 0xffff))) & 0xffff; // y == 1/x mod 2^16
+  // last step - calculate inverse mod DV directly
+  // assumes 16 < DB <= 32 and assumes ability to handle 48-bit ints
+  y = (y * (2 - x * y % this.DV)) % this.DV; // y == 1/x mod 2^dbits
+  // we really want the negative inverse, and -DV < y < DV
+  return (y > 0) ? this.DV - y : -y
+}
+
+// Montgomery reduction
+function Montgomery(m) {
+  this.m = m
+  this.mp = m.invDigit()
+  this.mpl = this.mp & 0x7fff
+  this.mph = this.mp >> 15
+  this.um = (1 << (m.DB - 15)) - 1
+  this.mt2 = 2 * m.t
+}
+
+// xR mod m
+function montConvert(x) {
+  var r = new BigInteger()
+  x.abs()
+    .dlShiftTo(this.m.t, r)
+  r.divRemTo(this.m, null, r)
+  if (x.s < 0 && r.compareTo(BigInteger.ZERO) > 0) this.m.subTo(r, r)
+  return r
+}
+
+// x/R mod m
+function montRevert(x) {
+  var r = new BigInteger()
+  x.copyTo(r)
+  this.reduce(r)
+  return r
+}
+
+// x = x/R mod m (HAC 14.32)
+function montReduce(x) {
+  while (x.t <= this.mt2) // pad x so am has enough room later
+    x[x.t++] = 0
+  for (var i = 0; i < this.m.t; ++i) {
+    // faster way of calculating u0 = x[i]*mp mod DV
+    var j = x[i] & 0x7fff
+    var u0 = (j * this.mpl + (((j * this.mph + (x[i] >> 15) * this.mpl) & this.um) << 15)) & x.DM
+    // use am to combine the multiply-shift-add into one call
+    j = i + this.m.t
+    x[j] += this.m.am(0, u0, x, i, 0, this.m.t)
+    // propagate carry
+    while (x[j] >= x.DV) {
+      x[j] -= x.DV
+      x[++j]++
+    }
+  }
+  x.clamp()
+  x.drShiftTo(this.m.t, x)
+  if (x.compareTo(this.m) >= 0) x.subTo(this.m, x)
+}
+
+// r = "x^2/R mod m"; x != r
+function montSqrTo(x, r) {
+  x.squareTo(r)
+  this.reduce(r)
+}
+
+// r = "xy/R mod m"; x,y != r
+function montMulTo(x, y, r) {
+  x.multiplyTo(y, r)
+  this.reduce(r)
+}
+
+Montgomery.prototype.convert = montConvert
+Montgomery.prototype.revert = montRevert
+Montgomery.prototype.reduce = montReduce
+Montgomery.prototype.mulTo = montMulTo
+Montgomery.prototype.sqrTo = montSqrTo
+
+// (protected) true iff this is even
+function bnpIsEven() {
+  return ((this.t > 0) ? (this[0] & 1) : this.s) == 0
+}
+
+// (protected) this^e, e < 2^32, doing sqr and mul with "r" (HAC 14.79)
+function bnpExp(e, z) {
+  if (e > 0xffffffff || e < 1) return BigInteger.ONE
+  var r = new BigInteger(),
+    r2 = new BigInteger(),
+    g = z.convert(this),
+    i = nbits(e) - 1
+  g.copyTo(r)
+  while (--i >= 0) {
+    z.sqrTo(r, r2)
+    if ((e & (1 << i)) > 0) z.mulTo(r2, g, r)
+    else {
+      var t = r
+      r = r2
+      r2 = t
+    }
+  }
+  return z.revert(r)
+}
+
+// (public) this^e % m, 0 <= e < 2^32
+function bnModPowInt(e, m) {
+  var z
+  if (e < 256 || m.isEven()) z = new Classic(m)
+  else z = new Montgomery(m)
+  return this.exp(e, z)
+}
+
+// protected
+proto.copyTo = bnpCopyTo
+proto.fromInt = bnpFromInt
+proto.fromString = bnpFromString
+proto.clamp = bnpClamp
+proto.dlShiftTo = bnpDLShiftTo
+proto.drShiftTo = bnpDRShiftTo
+proto.lShiftTo = bnpLShiftTo
+proto.rShiftTo = bnpRShiftTo
+proto.subTo = bnpSubTo
+proto.multiplyTo = bnpMultiplyTo
+proto.squareTo = bnpSquareTo
+proto.divRemTo = bnpDivRemTo
+proto.invDigit = bnpInvDigit
+proto.isEven = bnpIsEven
+proto.exp = bnpExp
+
+// public
+proto.toString = bnToString
+proto.negate = bnNegate
+proto.abs = bnAbs
+proto.compareTo = bnCompareTo
+proto.bitLength = bnBitLength
+proto.byteLength = bnByteLength
+proto.mod = bnMod
+proto.modPowInt = bnModPowInt
+
+// (public)
+function bnClone() {
+  var r = new BigInteger()
+  this.copyTo(r)
+  return r
+}
+
+// (public) return value as integer
+function bnIntValue() {
+  if (this.s < 0) {
+    if (this.t == 1) return this[0] - this.DV
+    else if (this.t == 0) return -1
+  } else if (this.t == 1) return this[0]
+  else if (this.t == 0) return 0
+  // assumes 16 < DB < 32
+  return ((this[1] & ((1 << (32 - this.DB)) - 1)) << this.DB) | this[0]
+}
+
+// (public) return value as byte
+function bnByteValue() {
+  return (this.t == 0) ? this.s : (this[0] << 24) >> 24
+}
+
+// (public) return value as short (assumes DB>=16)
+function bnShortValue() {
+  return (this.t == 0) ? this.s : (this[0] << 16) >> 16
+}
+
+// (protected) return x s.t. r^x < DV
+function bnpChunkSize(r) {
+  return Math.floor(Math.LN2 * this.DB / Math.log(r))
+}
+
+// (public) 0 if this == 0, 1 if this > 0
+function bnSigNum() {
+  if (this.s < 0) return -1
+  else if (this.t <= 0 || (this.t == 1 && this[0] <= 0)) return 0
+  else return 1
+}
+
+// (protected) convert to radix string
+function bnpToRadix(b) {
+  if (b == null) b = 10
+  if (this.signum() == 0 || b < 2 || b > 36) return "0"
+  var cs = this.chunkSize(b)
+  var a = Math.pow(b, cs)
+  var d = nbv(a),
+    y = new BigInteger(),
+    z = new BigInteger(),
+    r = ""
+  this.divRemTo(d, y, z)
+  while (y.signum() > 0) {
+    r = (a + z.intValue())
+      .toString(b)
+      .substr(1) + r
+    y.divRemTo(d, y, z)
+  }
+  return z.intValue()
+    .toString(b) + r
+}
+
+// (protected) convert from radix string
+function bnpFromRadix(s, b) {
+  var self = this
+  self.fromInt(0)
+  if (b == null) b = 10
+  var cs = self.chunkSize(b)
+  var d = Math.pow(b, cs),
+    mi = false,
+    j = 0,
+    w = 0
+  for (var i = 0; i < s.length; ++i) {
+    var x = intAt(s, i)
+    if (x < 0) {
+      if (s.charAt(i) == "-" && self.signum() == 0) mi = true
+      continue
+    }
+    w = b * w + x
+    if (++j >= cs) {
+      self.dMultiply(d)
+      self.dAddOffset(w, 0)
+      j = 0
+      w = 0
+    }
+  }
+  if (j > 0) {
+    self.dMultiply(Math.pow(b, j))
+    self.dAddOffset(w, 0)
+  }
+  if (mi) BigInteger.ZERO.subTo(self, self)
+}
+
+// (protected) alternate constructor
+function bnpFromNumber(a, b, c) {
+  var self = this
+  if ("number" == typeof b) {
+    // new BigInteger(int,int,RNG)
+    if (a < 2) self.fromInt(1)
+    else {
+      self.fromNumber(a, c)
+      if (!self.testBit(a - 1)) // force MSB set
+        self.bitwiseTo(BigInteger.ONE.shiftLeft(a - 1), op_or, self)
+      if (self.isEven()) self.dAddOffset(1, 0); // force odd
+      while (!self.isProbablePrime(b)) {
+        self.dAddOffset(2, 0)
+        if (self.bitLength() > a) self.subTo(BigInteger.ONE.shiftLeft(a - 1), self)
+      }
+    }
+  } else {
+    // new BigInteger(int,RNG)
+    var x = new Array(),
+      t = a & 7
+    x.length = (a >> 3) + 1
+    b.nextBytes(x)
+    if (t > 0) x[0] &= ((1 << t) - 1)
+    else x[0] = 0
+    self.fromString(x, 256)
+  }
+}
+
+// (public) convert to bigendian byte array
+function bnToByteArray() {
+  var self = this
+  var i = self.t,
+    r = new Array()
+  r[0] = self.s
+  var p = self.DB - (i * self.DB) % 8,
+    d, k = 0
+  if (i-- > 0) {
+    if (p < self.DB && (d = self[i] >> p) != (self.s & self.DM) >> p)
+      r[k++] = d | (self.s << (self.DB - p))
+    while (i >= 0) {
+      if (p < 8) {
+        d = (self[i] & ((1 << p) - 1)) << (8 - p)
+        d |= self[--i] >> (p += self.DB - 8)
+      } else {
+        d = (self[i] >> (p -= 8)) & 0xff
+        if (p <= 0) {
+          p += self.DB
+          --i
+        }
+      }
+      if ((d & 0x80) != 0) d |= -256
+      if (k === 0 && (self.s & 0x80) != (d & 0x80))++k
+      if (k > 0 || d != self.s) r[k++] = d
+    }
+  }
+  return r
+}
+
+function bnEquals(a) {
+  return (this.compareTo(a) == 0)
+}
+
+function bnMin(a) {
+  return (this.compareTo(a) < 0) ? this : a
+}
+
+function bnMax(a) {
+  return (this.compareTo(a) > 0) ? this : a
+}
+
+// (protected) r = this op a (bitwise)
+function bnpBitwiseTo(a, op, r) {
+  var self = this
+  var i, f, m = Math.min(a.t, self.t)
+  for (i = 0; i < m; ++i) r[i] = op(self[i], a[i])
+  if (a.t < self.t) {
+    f = a.s & self.DM
+    for (i = m; i < self.t; ++i) r[i] = op(self[i], f)
+    r.t = self.t
+  } else {
+    f = self.s & self.DM
+    for (i = m; i < a.t; ++i) r[i] = op(f, a[i])
+    r.t = a.t
+  }
+  r.s = op(self.s, a.s)
+  r.clamp()
+}
+
+// (public) this & a
+function op_and(x, y) {
+  return x & y
+}
+
+function bnAnd(a) {
+  var r = new BigInteger()
+  this.bitwiseTo(a, op_and, r)
+  return r
+}
+
+// (public) this | a
+function op_or(x, y) {
+  return x | y
+}
+
+function bnOr(a) {
+  var r = new BigInteger()
+  this.bitwiseTo(a, op_or, r)
+  return r
+}
+
+// (public) this ^ a
+function op_xor(x, y) {
+  return x ^ y
+}
+
+function bnXor(a) {
+  var r = new BigInteger()
+  this.bitwiseTo(a, op_xor, r)
+  return r
+}
+
+// (public) this & ~a
+function op_andnot(x, y) {
+  return x & ~y
+}
+
+function bnAndNot(a) {
+  var r = new BigInteger()
+  this.bitwiseTo(a, op_andnot, r)
+  return r
+}
+
+// (public) ~this
+function bnNot() {
+  var r = new BigInteger()
+  for (var i = 0; i < this.t; ++i) r[i] = this.DM & ~this[i]
+  r.t = this.t
+  r.s = ~this.s
+  return r
+}
+
+// (public) this << n
+function bnShiftLeft(n) {
+  var r = new BigInteger()
+  if (n < 0) this.rShiftTo(-n, r)
+  else this.lShiftTo(n, r)
+  return r
+}
+
+// (public) this >> n
+function bnShiftRight(n) {
+  var r = new BigInteger()
+  if (n < 0) this.lShiftTo(-n, r)
+  else this.rShiftTo(n, r)
+  return r
+}
+
+// return index of lowest 1-bit in x, x < 2^31
+function lbit(x) {
+  if (x == 0) return -1
+  var r = 0
+  if ((x & 0xffff) == 0) {
+    x >>= 16
+    r += 16
+  }
+  if ((x & 0xff) == 0) {
+    x >>= 8
+    r += 8
+  }
+  if ((x & 0xf) == 0) {
+    x >>= 4
+    r += 4
+  }
+  if ((x & 3) == 0) {
+    x >>= 2
+    r += 2
+  }
+  if ((x & 1) == 0)++r
+  return r
+}
+
+// (public) returns index of lowest 1-bit (or -1 if none)
+function bnGetLowestSetBit() {
+  for (var i = 0; i < this.t; ++i)
+    if (this[i] != 0) return i * this.DB + lbit(this[i])
+  if (this.s < 0) return this.t * this.DB
+  return -1
+}
+
+// return number of 1 bits in x
+function cbit(x) {
+  var r = 0
+  while (x != 0) {
+    x &= x - 1
+    ++r
+  }
+  return r
+}
+
+// (public) return number of set bits
+function bnBitCount() {
+  var r = 0,
+    x = this.s & this.DM
+  for (var i = 0; i < this.t; ++i) r += cbit(this[i] ^ x)
+  return r
+}
+
+// (public) true iff nth bit is set
+function bnTestBit(n) {
+  var j = Math.floor(n / this.DB)
+  if (j >= this.t) return (this.s != 0)
+  return ((this[j] & (1 << (n % this.DB))) != 0)
+}
+
+// (protected) this op (1<<n)
+function bnpChangeBit(n, op) {
+  var r = BigInteger.ONE.shiftLeft(n)
+  this.bitwiseTo(r, op, r)
+  return r
+}
+
+// (public) this | (1<<n)
+function bnSetBit(n) {
+  return this.changeBit(n, op_or)
+}
+
+// (public) this & ~(1<<n)
+function bnClearBit(n) {
+  return this.changeBit(n, op_andnot)
+}
+
+// (public) this ^ (1<<n)
+function bnFlipBit(n) {
+  return this.changeBit(n, op_xor)
+}
+
+// (protected) r = this + a
+function bnpAddTo(a, r) {
+  var self = this
+
+  var i = 0,
+    c = 0,
+    m = Math.min(a.t, self.t)
+  while (i < m) {
+    c += self[i] + a[i]
+    r[i++] = c & self.DM
+    c >>= self.DB
+  }
+  if (a.t < self.t) {
+    c += a.s
+    while (i < self.t) {
+      c += self[i]
+      r[i++] = c & self.DM
+      c >>= self.DB
+    }
+    c += self.s
+  } else {
+    c += self.s
+    while (i < a.t) {
+      c += a[i]
+      r[i++] = c & self.DM
+      c >>= self.DB
+    }
+    c += a.s
+  }
+  r.s = (c < 0) ? -1 : 0
+  if (c > 0) r[i++] = c
+  else if (c < -1) r[i++] = self.DV + c
+  r.t = i
+  r.clamp()
+}
+
+// (public) this + a
+function bnAdd(a) {
+  var r = new BigInteger()
+  this.addTo(a, r)
+  return r
+}
+
+// (public) this - a
+function bnSubtract(a) {
+  var r = new BigInteger()
+  this.subTo(a, r)
+  return r
+}
+
+// (public) this * a
+function bnMultiply(a) {
+  var r = new BigInteger()
+  this.multiplyTo(a, r)
+  return r
+}
+
+// (public) this^2
+function bnSquare() {
+  var r = new BigInteger()
+  this.squareTo(r)
+  return r
+}
+
+// (public) this / a
+function bnDivide(a) {
+  var r = new BigInteger()
+  this.divRemTo(a, r, null)
+  return r
+}
+
+// (public) this % a
+function bnRemainder(a) {
+  var r = new BigInteger()
+  this.divRemTo(a, null, r)
+  return r
+}
+
+// (public) [this/a,this%a]
+function bnDivideAndRemainder(a) {
+  var q = new BigInteger(),
+    r = new BigInteger()
+  this.divRemTo(a, q, r)
+  return new Array(q, r)
+}
+
+// (protected) this *= n, this >= 0, 1 < n < DV
+function bnpDMultiply(n) {
+  this[this.t] = this.am(0, n - 1, this, 0, 0, this.t)
+  ++this.t
+  this.clamp()
+}
+
+// (protected) this += n << w words, this >= 0
+function bnpDAddOffset(n, w) {
+  if (n == 0) return
+  while (this.t <= w) this[this.t++] = 0
+  this[w] += n
+  while (this[w] >= this.DV) {
+    this[w] -= this.DV
+    if (++w >= this.t) this[this.t++] = 0
+    ++this[w]
+  }
+}
+
+// A "null" reducer
+function NullExp() {}
+
+function nNop(x) {
+  return x
+}
+
+function nMulTo(x, y, r) {
+  x.multiplyTo(y, r)
+}
+
+function nSqrTo(x, r) {
+  x.squareTo(r)
+}
+
+NullExp.prototype.convert = nNop
+NullExp.prototype.revert = nNop
+NullExp.prototype.mulTo = nMulTo
+NullExp.prototype.sqrTo = nSqrTo
+
+// (public) this^e
+function bnPow(e) {
+  return this.exp(e, new NullExp())
+}
+
+// (protected) r = lower n words of "this * a", a.t <= n
+// "this" should be the larger one if appropriate.
+function bnpMultiplyLowerTo(a, n, r) {
+  var i = Math.min(this.t + a.t, n)
+  r.s = 0; // assumes a,this >= 0
+  r.t = i
+  while (i > 0) r[--i] = 0
+  var j
+  for (j = r.t - this.t; i < j; ++i) r[i + this.t] = this.am(0, a[i], r, i, 0, this.t)
+  for (j = Math.min(a.t, n); i < j; ++i) this.am(0, a[i], r, i, 0, n - i)
+  r.clamp()
+}
+
+// (protected) r = "this * a" without lower n words, n > 0
+// "this" should be the larger one if appropriate.
+function bnpMultiplyUpperTo(a, n, r) {
+  --n
+  var i = r.t = this.t + a.t - n
+  r.s = 0; // assumes a,this >= 0
+  while (--i >= 0) r[i] = 0
+  for (i = Math.max(n - this.t, 0); i < a.t; ++i)
+    r[this.t + i - n] = this.am(n - i, a[i], r, 0, 0, this.t + i - n)
+  r.clamp()
+  r.drShiftTo(1, r)
+}
+
+// Barrett modular reduction
+function Barrett(m) {
+  // setup Barrett
+  this.r2 = new BigInteger()
+  this.q3 = new BigInteger()
+  BigInteger.ONE.dlShiftTo(2 * m.t, this.r2)
+  this.mu = this.r2.divide(m)
+  this.m = m
+}
+
+function barrettConvert(x) {
+  if (x.s < 0 || x.t > 2 * this.m.t) return x.mod(this.m)
+  else if (x.compareTo(this.m) < 0) return x
+  else {
+    var r = new BigInteger()
+    x.copyTo(r)
+    this.reduce(r)
+    return r
+  }
+}
+
+function barrettRevert(x) {
+  return x
+}
+
+// x = x mod m (HAC 14.42)
+function barrettReduce(x) {
+  var self = this
+  x.drShiftTo(self.m.t - 1, self.r2)
+  if (x.t > self.m.t + 1) {
+    x.t = self.m.t + 1
+    x.clamp()
+  }
+  self.mu.multiplyUpperTo(self.r2, self.m.t + 1, self.q3)
+  self.m.multiplyLowerTo(self.q3, self.m.t + 1, self.r2)
+  while (x.compareTo(self.r2) < 0) x.dAddOffset(1, self.m.t + 1)
+  x.subTo(self.r2, x)
+  while (x.compareTo(self.m) >= 0) x.subTo(self.m, x)
+}
+
+// r = x^2 mod m; x != r
+function barrettSqrTo(x, r) {
+  x.squareTo(r)
+  this.reduce(r)
+}
+
+// r = x*y mod m; x,y != r
+function barrettMulTo(x, y, r) {
+  x.multiplyTo(y, r)
+  this.reduce(r)
+}
+
+Barrett.prototype.convert = barrettConvert
+Barrett.prototype.revert = barrettRevert
+Barrett.prototype.reduce = barrettReduce
+Barrett.prototype.mulTo = barrettMulTo
+Barrett.prototype.sqrTo = barrettSqrTo
+
+// (public) this^e % m (HAC 14.85)
+function bnModPow(e, m) {
+  var i = e.bitLength(),
+    k, r = nbv(1),
+    z
+  if (i <= 0) return r
+  else if (i < 18) k = 1
+  else if (i < 48) k = 3
+  else if (i < 144) k = 4
+  else if (i < 768) k = 5
+  else k = 6
+  if (i < 8)
+    z = new Classic(m)
+  else if (m.isEven())
+    z = new Barrett(m)
+  else
+    z = new Montgomery(m)
+
+  // precomputation
+  var g = new Array(),
+    n = 3,
+    k1 = k - 1,
+    km = (1 << k) - 1
+  g[1] = z.convert(this)
+  if (k > 1) {
+    var g2 = new BigInteger()
+    z.sqrTo(g[1], g2)
+    while (n <= km) {
+      g[n] = new BigInteger()
+      z.mulTo(g2, g[n - 2], g[n])
+      n += 2
+    }
+  }
+
+  var j = e.t - 1,
+    w, is1 = true,
+    r2 = new BigInteger(),
+    t
+  i = nbits(e[j]) - 1
+  while (j >= 0) {
+    if (i >= k1) w = (e[j] >> (i - k1)) & km
+    else {
+      w = (e[j] & ((1 << (i + 1)) - 1)) << (k1 - i)
+      if (j > 0) w |= e[j - 1] >> (this.DB + i - k1)
+    }
+
+    n = k
+    while ((w & 1) == 0) {
+      w >>= 1
+      --n
+    }
+    if ((i -= n) < 0) {
+      i += this.DB
+      --j
+    }
+    if (is1) { // ret == 1, don't bother squaring or multiplying it
+      g[w].copyTo(r)
+      is1 = false
+    } else {
+      while (n > 1) {
+        z.sqrTo(r, r2)
+        z.sqrTo(r2, r)
+        n -= 2
+      }
+      if (n > 0) z.sqrTo(r, r2)
+      else {
+        t = r
+        r = r2
+        r2 = t
+      }
+      z.mulTo(r2, g[w], r)
+    }
+
+    while (j >= 0 && (e[j] & (1 << i)) == 0) {
+      z.sqrTo(r, r2)
+      t = r
+      r = r2
+      r2 = t
+      if (--i < 0) {
+        i = this.DB - 1
+        --j
+      }
+    }
+  }
+  return z.revert(r)
+}
+
+// (public) gcd(this,a) (HAC 14.54)
+function bnGCD(a) {
+  var x = (this.s < 0) ? this.negate() : this.clone()
+  var y = (a.s < 0) ? a.negate() : a.clone()
+  if (x.compareTo(y) < 0) {
+    var t = x
+    x = y
+    y = t
+  }
+  var i = x.getLowestSetBit(),
+    g = y.getLowestSetBit()
+  if (g < 0) return x
+  if (i < g) g = i
+  if (g > 0) {
+    x.rShiftTo(g, x)
+    y.rShiftTo(g, y)
+  }
+  while (x.signum() > 0) {
+    if ((i = x.getLowestSetBit()) > 0) x.rShiftTo(i, x)
+    if ((i = y.getLowestSetBit()) > 0) y.rShiftTo(i, y)
+    if (x.compareTo(y) >= 0) {
+      x.subTo(y, x)
+      x.rShiftTo(1, x)
+    } else {
+      y.subTo(x, y)
+      y.rShiftTo(1, y)
+    }
+  }
+  if (g > 0) y.lShiftTo(g, y)
+  return y
+}
+
+// (protected) this % n, n < 2^26
+function bnpModInt(n) {
+  if (n <= 0) return 0
+  var d = this.DV % n,
+    r = (this.s < 0) ? n - 1 : 0
+  if (this.t > 0)
+    if (d == 0) r = this[0] % n
+    else
+      for (var i = this.t - 1; i >= 0; --i) r = (d * r + this[i]) % n
+  return r
+}
+
+// (public) 1/this % m (HAC 14.61)
+function bnModInverse(m) {
+  var ac = m.isEven()
+  if ((this.isEven() && ac) || m.signum() == 0) return BigInteger.ZERO
+  var u = m.clone(),
+    v = this.clone()
+  var a = nbv(1),
+    b = nbv(0),
+    c = nbv(0),
+    d = nbv(1)
+  while (u.signum() != 0) {
+    while (u.isEven()) {
+      u.rShiftTo(1, u)
+      if (ac) {
+        if (!a.isEven() || !b.isEven()) {
+          a.addTo(this, a)
+          b.subTo(m, b)
+        }
+        a.rShiftTo(1, a)
+      } else if (!b.isEven()) b.subTo(m, b)
+      b.rShiftTo(1, b)
+    }
+    while (v.isEven()) {
+      v.rShiftTo(1, v)
+      if (ac) {
+        if (!c.isEven() || !d.isEven()) {
+          c.addTo(this, c)
+          d.subTo(m, d)
+        }
+        c.rShiftTo(1, c)
+      } else if (!d.isEven()) d.subTo(m, d)
+      d.rShiftTo(1, d)
+    }
+    if (u.compareTo(v) >= 0) {
+      u.subTo(v, u)
+      if (ac) a.subTo(c, a)
+      b.subTo(d, b)
+    } else {
+      v.subTo(u, v)
+      if (ac) c.subTo(a, c)
+      d.subTo(b, d)
+    }
+  }
+  if (v.compareTo(BigInteger.ONE) != 0) return BigInteger.ZERO
+  if (d.compareTo(m) >= 0) return d.subtract(m)
+  if (d.signum() < 0) d.addTo(m, d)
+  else return d
+  if (d.signum() < 0) return d.add(m)
+  else return d
+}
+
+var lowprimes = [
+  2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
+  73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
+  157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233,
+  239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317,
+  331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419,
+  421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503,
+  509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607,
+  613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701,
+  709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811,
+  821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911,
+  919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997
+]
+
+var lplim = (1 << 26) / lowprimes[lowprimes.length - 1]
+
+// (public) test primality with certainty >= 1-.5^t
+function bnIsProbablePrime(t) {
+  var i, x = this.abs()
+  if (x.t == 1 && x[0] <= lowprimes[lowprimes.length - 1]) {
+    for (i = 0; i < lowprimes.length; ++i)
+      if (x[0] == lowprimes[i]) return true
+    return false
+  }
+  if (x.isEven()) return false
+  i = 1
+  while (i < lowprimes.length) {
+    var m = lowprimes[i],
+      j = i + 1
+    while (j < lowprimes.length && m < lplim) m *= lowprimes[j++]
+    m = x.modInt(m)
+    while (i < j) if (m % lowprimes[i++] == 0) return false
+  }
+  return x.millerRabin(t)
+}
+
+// (protected) true if probably prime (HAC 4.24, Miller-Rabin)
+function bnpMillerRabin(t) {
+  var n1 = this.subtract(BigInteger.ONE)
+  var k = n1.getLowestSetBit()
+  if (k <= 0) return false
+  var r = n1.shiftRight(k)
+  t = (t + 1) >> 1
+  if (t > lowprimes.length) t = lowprimes.length
+  var a = new BigInteger(null)
+  var j, bases = []
+  for (var i = 0; i < t; ++i) {
+    for (;;) {
+      j = lowprimes[Math.floor(Math.random() * lowprimes.length)]
+      if (bases.indexOf(j) == -1) break
+    }
+    bases.push(j)
+    a.fromInt(j)
+    var y = a.modPow(r, this)
+    if (y.compareTo(BigInteger.ONE) != 0 && y.compareTo(n1) != 0) {
+      var j = 1
+      while (j++ < k && y.compareTo(n1) != 0) {
+        y = y.modPowInt(2, this)
+        if (y.compareTo(BigInteger.ONE) == 0) return false
+      }
+      if (y.compareTo(n1) != 0) return false
+    }
+  }
+  return true
+}
+
+// protected
+proto.chunkSize = bnpChunkSize
+proto.toRadix = bnpToRadix
+proto.fromRadix = bnpFromRadix
+proto.fromNumber = bnpFromNumber
+proto.bitwiseTo = bnpBitwiseTo
+proto.changeBit = bnpChangeBit
+proto.addTo = bnpAddTo
+proto.dMultiply = bnpDMultiply
+proto.dAddOffset = bnpDAddOffset
+proto.multiplyLowerTo = bnpMultiplyLowerTo
+proto.multiplyUpperTo = bnpMultiplyUpperTo
+proto.modInt = bnpModInt
+proto.millerRabin = bnpMillerRabin
+
+// public
+proto.clone = bnClone
+proto.intValue = bnIntValue
+proto.byteValue = bnByteValue
+proto.shortValue = bnShortValue
+proto.signum = bnSigNum
+proto.toByteArray = bnToByteArray
+proto.equals = bnEquals
+proto.min = bnMin
+proto.max = bnMax
+proto.and = bnAnd
+proto.or = bnOr
+proto.xor = bnXor
+proto.andNot = bnAndNot
+proto.not = bnNot
+proto.shiftLeft = bnShiftLeft
+proto.shiftRight = bnShiftRight
+proto.getLowestSetBit = bnGetLowestSetBit
+proto.bitCount = bnBitCount
+proto.testBit = bnTestBit
+proto.setBit = bnSetBit
+proto.clearBit = bnClearBit
+proto.flipBit = bnFlipBit
+proto.add = bnAdd
+proto.subtract = bnSubtract
+proto.multiply = bnMultiply
+proto.divide = bnDivide
+proto.remainder = bnRemainder
+proto.divideAndRemainder = bnDivideAndRemainder
+proto.modPow = bnModPow
+proto.modInverse = bnModInverse
+proto.pow = bnPow
+proto.gcd = bnGCD
+proto.isProbablePrime = bnIsProbablePrime
+
+// JSBN-specific extension
+proto.square = bnSquare
+
+// constants
+BigInteger.ZERO = nbv(0)
+BigInteger.ONE = nbv(1)
+BigInteger.valueOf = nbv
+
+module.exports = BigInteger
+
+},{"../package.json":4}],2:[function(require,module,exports){
+(function (Buffer){
+// FIXME: Kind of a weird way to throw exceptions, consider removing
+var assert = require('assert')
+var BigInteger = require('./bigi')
+
+/**
+ * Turns a byte array into a big integer.
+ *
+ * This function will interpret a byte array as a big integer in big
+ * endian notation.
+ */
+BigInteger.fromByteArrayUnsigned = function(byteArray) {
+  // BigInteger expects a DER integer conformant byte array
+  if (byteArray[0] & 0x80) {
+    return new BigInteger([0].concat(byteArray))
+  }
+
+  return new BigInteger(byteArray)
+}
+
+/**
+ * Returns a byte array representation of the big integer.
+ *
+ * This returns the absolute of the contained value in big endian
+ * form. A value of zero results in an empty array.
+ */
+BigInteger.prototype.toByteArrayUnsigned = function() {
+  var byteArray = this.toByteArray()
+  return byteArray[0] === 0 ? byteArray.slice(1) : byteArray
+}
+
+BigInteger.fromDERInteger = function(byteArray) {
+  return new BigInteger(byteArray)
+}
+
+/*
+ * Converts BigInteger to a DER integer representation.
+ *
+ * The format for this value uses the most significant bit as a sign
+ * bit.  If the most significant bit is already set and the integer is
+ * positive, a 0x00 is prepended.
+ *
+ * Examples:
+ *
+ *      0 =>     0x00
+ *      1 =>     0x01
+ *     -1 =>     0xff
+ *    127 =>     0x7f
+ *   -127 =>     0x81
+ *    128 =>   0x0080
+ *   -128 =>     0x80
+ *    255 =>   0x00ff
+ *   -255 =>   0xff01
+ *  16300 =>   0x3fac
+ * -16300 =>   0xc054
+ *  62300 => 0x00f35c
+ * -62300 => 0xff0ca4
+*/
+BigInteger.prototype.toDERInteger = BigInteger.prototype.toByteArray
+
+BigInteger.fromBuffer = function(buffer) {
+  // BigInteger expects a DER integer conformant byte array
+  if (buffer[0] & 0x80) {
+    var byteArray = Array.prototype.slice.call(buffer)
+
+    return new BigInteger([0].concat(byteArray))
+  }
+
+  return new BigInteger(buffer)
+}
+
+BigInteger.fromHex = function(hex) {
+  if (hex === '') return BigInteger.ZERO
+
+  assert.equal(hex, hex.match(/^[A-Fa-f0-9]+/), 'Invalid hex string')
+  assert.equal(hex.length % 2, 0, 'Incomplete hex')
+  return new BigInteger(hex, 16)
+}
+
+BigInteger.prototype.toBuffer = function(size) {
+  var byteArray = this.toByteArrayUnsigned()
+  var zeros = []
+
+  var padding = size - byteArray.length
+  while (zeros.length < padding) zeros.push(0)
+
+  return new Buffer(zeros.concat(byteArray))
+}
+
+BigInteger.prototype.toHex = function(size) {
+  return this.toBuffer(size).toString('hex')
+}
+
+}).call(this,require("buffer").Buffer)
+},{"./bigi":1,"assert":5,"buffer":7}],3:[function(require,module,exports){
+var BigInteger = require('./bigi')
+
+//addons
+require('./convert')
+
+module.exports = BigInteger
+},{"./bigi":1,"./convert":2}],4:[function(require,module,exports){
+module.exports={
+  "name": "bigi",
+  "version": "1.4.0",
+  "description": "Big integers.",
+  "keywords": [
+    "cryptography",
+    "math",
+    "bitcoin",
+    "arbitrary",
+    "precision",
+    "arithmetic",
+    "big",
+    "integer",
+    "int",
+    "number",
+    "biginteger",
+    "bigint",
+    "bignumber",
+    "decimal",
+    "float"
+  ],
+  "devDependencies": {
+    "mocha": "^1.20.1",
+    "jshint": "^2.5.1",
+    "coveralls": "^2.10.0",
+    "istanbul": "^0.2.11"
+  },
+  "repository": {
+    "url": "https://github.com/cryptocoinjs/bigi",
+    "type": "git"
+  },
+  "main": "./lib/index.js",
+  "scripts": {
+    "test": "_mocha -- test/*.js",
+    "jshint": "jshint --config jshint.json lib/*.js ; true",
+    "unit": "mocha",
+    "coverage": "istanbul cover ./node_modules/.bin/_mocha -- --reporter list test/*.js",
+    "coveralls": "npm run-script coverage && node ./node_modules/.bin/coveralls < coverage/lcov.info"
+  },
+  "dependencies": {},
+  "testling": {
+    "files": "test/*.js",
+    "harness": "mocha",
+    "browsers": [
+      "ie/9..latest",
+      "firefox/latest",
+      "chrome/latest",
+      "safari/6.0..latest",
+      "iphone/6.0..latest",
+      "android-browser/4.2..latest"
+    ]
+  },
+  "bugs": {
+    "url": "https://github.com/cryptocoinjs/bigi/issues"
+  },
+  "homepage": "https://github.com/cryptocoinjs/bigi",
+  "_id": "bigi@1.4.0",
+  "dist": {
+    "shasum": "90ac1aeac0a531216463bdb58f42c1e05c8407ac",
+    "tarball": "http://registry.npmjs.org/bigi/-/bigi-1.4.0.tgz"
+  },
+  "_from": "bigi@^1.4.0",
+  "_npmVersion": "1.4.3",
+  "_npmUser": {
+    "name": "jp",
+    "email": "jprichardson@gmail.com"
+  },
+  "maintainers": [
+    {
+      "name": "jp",
+      "email": "jprichardson@gmail.com"
+    },
+    {
+      "name": "midnightlightning",
+      "email": "boydb@midnightdesign.ws"
+    },
+    {
+      "name": "sidazhang",
+      "email": "sidazhang89@gmail.com"
+    },
+    {
+      "name": "nadav",
+      "email": "npm@shesek.info"
+    }
+  ],
+  "directories": {},
+  "_shasum": "90ac1aeac0a531216463bdb58f42c1e05c8407ac",
+  "_resolved": "https://registry.npmjs.org/bigi/-/bigi-1.4.0.tgz"
+}
+
+},{}],5:[function(require,module,exports){
+// http://wiki.commonjs.org/wiki/Unit_Testing/1.0
+//
+// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
+//
+// Originally from narwhal.js (http://narwhaljs.org)
+// Copyright (c) 2009 Thomas Robinson <280north.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the 'Software'), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// when used in node, this will actually load the util module we depend on
+// versus loading the builtin util module as happens otherwise
+// this is a bug in node module loading as far as I am concerned
+var util = require('util/');
+
+var pSlice = Array.prototype.slice;
+var hasOwn = Object.prototype.hasOwnProperty;
+
+// 1. The assert module provides functions that throw
+// AssertionError's when particular conditions are not met. The
+// assert module must conform to the following interface.
+
+var assert = module.exports = ok;
+
+// 2. The AssertionError is defined in assert.
+// new assert.AssertionError({ message: message,
+//                             actual: actual,
+//                             expected: expected })
+
+assert.AssertionError = function AssertionError(options) {
+  this.name = 'AssertionError';
+  this.actual = options.actual;
+  this.expected = options.expected;
+  this.operator = options.operator;
+  if (options.message) {
+    this.message = options.message;
+    this.generatedMessage = false;
+  } else {
+    this.message = getMessage(this);
+    this.generatedMessage = true;
+  }
+  var stackStartFunction = options.stackStartFunction || fail;
+
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, stackStartFunction);
+  }
+  else {
+    // non v8 browsers so we can have a stacktrace
+    var err = new Error();
+    if (err.stack) {
+      var out = err.stack;
+
+      // try to strip useless frames
+      var fn_name = stackStartFunction.name;
+      var idx = out.indexOf('\n' + fn_name);
+      if (idx >= 0) {
+        // once we have located the function frame
+        // we need to strip out everything before it (and its line)
+        var next_line = out.indexOf('\n', idx + 1);
+        out = out.substring(next_line + 1);
+      }
+
+      this.stack = out;
+    }
+  }
+};
+
+// assert.AssertionError instanceof Error
+util.inherits(assert.AssertionError, Error);
+
+function replacer(key, value) {
+  if (util.isUndefined(value)) {
+    return '' + value;
+  }
+  if (util.isNumber(value) && !isFinite(value)) {
+    return value.toString();
+  }
+  if (util.isFunction(value) || util.isRegExp(value)) {
+    return value.toString();
+  }
+  return value;
+}
+
+function truncate(s, n) {
+  if (util.isString(s)) {
+    return s.length < n ? s : s.slice(0, n);
+  } else {
+    return s;
+  }
+}
+
+function getMessage(self) {
+  return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' +
+         self.operator + ' ' +
+         truncate(JSON.stringify(self.expected, replacer), 128);
+}
+
+// At present only the three keys mentioned above are used and
+// understood by the spec. Implementations or sub modules can pass
+// other keys to the AssertionError's constructor - they will be
+// ignored.
+
+// 3. All of the following functions must throw an AssertionError
+// when a corresponding condition is not met, with a message that
+// may be undefined if not provided.  All assertion methods provide
+// both the actual and expected values to the assertion error for
+// display purposes.
+
+function fail(actual, expected, message, operator, stackStartFunction) {
+  throw new assert.AssertionError({
+    message: message,
+    actual: actual,
+    expected: expected,
+    operator: operator,
+    stackStartFunction: stackStartFunction
+  });
+}
+
+// EXTENSION! allows for well behaved errors defined elsewhere.
+assert.fail = fail;
+
+// 4. Pure assertion tests whether a value is truthy, as determined
+// by !!guard.
+// assert.ok(guard, message_opt);
+// This statement is equivalent to assert.equal(true, !!guard,
+// message_opt);. To test strictly for the value true, use
+// assert.strictEqual(true, guard, message_opt);.
+
+function ok(value, message) {
+  if (!value) fail(value, true, message, '==', assert.ok);
+}
+assert.ok = ok;
+
+// 5. The equality assertion tests shallow, coercive equality with
+// ==.
+// assert.equal(actual, expected, message_opt);
+
+assert.equal = function equal(actual, expected, message) {
+  if (actual != expected) fail(actual, expected, message, '==', assert.equal);
+};
+
+// 6. The non-equality assertion tests for whether two objects are not equal
+// with != assert.notEqual(actual, expected, message_opt);
+
+assert.notEqual = function notEqual(actual, expected, message) {
+  if (actual == expected) {
+    fail(actual, expected, message, '!=', assert.notEqual);
+  }
+};
+
+// 7. The equivalence assertion tests a deep equality relation.
+// assert.deepEqual(actual, expected, message_opt);
+
+assert.deepEqual = function deepEqual(actual, expected, message) {
+  if (!_deepEqual(actual, expected)) {
+    fail(actual, expected, message, 'deepEqual', assert.deepEqual);
+  }
+};
+
+function _deepEqual(actual, expected) {
+  // 7.1. All identical values are equivalent, as determined by ===.
+  if (actual === expected) {
+    return true;
+
+  } else if (util.isBuffer(actual) && util.isBuffer(expected)) {
+    if (actual.length != expected.length) return false;
+
+    for (var i = 0; i < actual.length; i++) {
+      if (actual[i] !== expected[i]) return false;
+    }
+
+    return true;
+
+  // 7.2. If the expected value is a Date object, the actual value is
+  // equivalent if it is also a Date object that refers to the same time.
+  } else if (util.isDate(actual) && util.isDate(expected)) {
+    return actual.getTime() === expected.getTime();
+
+  // 7.3 If the expected value is a RegExp object, the actual value is
+  // equivalent if it is also a RegExp object with the same source and
+  // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
+  } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
+    return actual.source === expected.source &&
+           actual.global === expected.global &&
+           actual.multiline === expected.multiline &&
+           actual.lastIndex === expected.lastIndex &&
+           actual.ignoreCase === expected.ignoreCase;
+
+  // 7.4. Other pairs that do not both pass typeof value == 'object',
+  // equivalence is determined by ==.
+  } else if (!util.isObject(actual) && !util.isObject(expected)) {
+    return actual == expected;
+
+  // 7.5 For all other Object pairs, including Array objects, equivalence is
+  // determined by having the same number of owned properties (as verified
+  // with Object.prototype.hasOwnProperty.call), the same set of keys
+  // (although not necessarily the same order), equivalent values for every
+  // corresponding key, and an identical 'prototype' property. Note: this
+  // accounts for both named and indexed properties on Arrays.
+  } else {
+    return objEquiv(actual, expected);
+  }
+}
+
+function isArguments(object) {
+  return Object.prototype.toString.call(object) == '[object Arguments]';
+}
+
+function objEquiv(a, b) {
+  if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b))
+    return false;
+  // an identical 'prototype' property.
+  if (a.prototype !== b.prototype) return false;
+  // if one is a primitive, the other must be same
+  if (util.isPrimitive(a) || util.isPrimitive(b)) {
+    return a === b;
+  }
+  var aIsArgs = isArguments(a),
+      bIsArgs = isArguments(b);
+  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
+    return false;
+  if (aIsArgs) {
+    a = pSlice.call(a);
+    b = pSlice.call(b);
+    return _deepEqual(a, b);
+  }
+  var ka = objectKeys(a),
+      kb = objectKeys(b),
+      key, i;
+  // having the same number of owned properties (keys incorporates
+  // hasOwnProperty)
+  if (ka.length != kb.length)
+    return false;
+  //the same set of keys (although not necessarily the same order),
+  ka.sort();
+  kb.sort();
+  //~~~cheap key test
+  for (i = ka.length - 1; i >= 0; i--) {
+    if (ka[i] != kb[i])
+      return false;
+  }
+  //equivalent values for every corresponding key, and
+  //~~~possibly expensive deep test
+  for (i = ka.length - 1; i >= 0; i--) {
+    key = ka[i];
+    if (!_deepEqual(a[key], b[key])) return false;
+  }
+  return true;
+}
+
+// 8. The non-equivalence assertion tests for any deep inequality.
+// assert.notDeepEqual(actual, expected, message_opt);
+
+assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
+  if (_deepEqual(actual, expected)) {
+    fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
+  }
+};
+
+// 9. The strict equality assertion tests strict equality, as determined by ===.
+// assert.strictEqual(actual, expected, message_opt);
+
+assert.strictEqual = function strictEqual(actual, expected, message) {
+  if (actual !== expected) {
+    fail(actual, expected, message, '===', assert.strictEqual);
+  }
+};
+
+// 10. The strict non-equality assertion tests for strict inequality, as
+// determined by !==.  assert.notStrictEqual(actual, expected, message_opt);
+
+assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
+  if (actual === expected) {
+    fail(actual, expected, message, '!==', assert.notStrictEqual);
+  }
+};
+
+function expectedException(actual, expected) {
+  if (!actual || !expected) {
+    return false;
+  }
+
+  if (Object.prototype.toString.call(expected) == '[object RegExp]') {
+    return expected.test(actual);
+  } else if (actual instanceof expected) {
+    return true;
+  } else if (expected.call({}, actual) === true) {
+    return true;
+  }
+
+  return false;
+}
+
+function _throws(shouldThrow, block, expected, message) {
+  var actual;
+
+  if (util.isString(expected)) {
+    message = expected;
+    expected = null;
+  }
+
+  try {
+    block();
+  } catch (e) {
+    actual = e;
+  }
+
+  message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
+            (message ? ' ' + message : '.');
+
+  if (shouldThrow && !actual) {
+    fail(actual, expected, 'Missing expected exception' + message);
+  }
+
+  if (!shouldThrow && expectedException(actual, expected)) {
+    fail(actual, expected, 'Got unwanted exception' + message);
+  }
+
+  if ((shouldThrow && actual && expected &&
+      !expectedException(actual, expected)) || (!shouldThrow && actual)) {
+    throw actual;
+  }
+}
+
+// 11. Expected to throw an error:
+// assert.throws(block, Error_opt, message_opt);
+
+assert.throws = function(block, /*optional*/error, /*optional*/message) {
+  _throws.apply(this, [true].concat(pSlice.call(arguments)));
+};
+
+// EXTENSION! This is annoying to write outside this module.
+assert.doesNotThrow = function(block, /*optional*/message) {
+  _throws.apply(this, [false].concat(pSlice.call(arguments)));
+};
+
+assert.ifError = function(err) { if (err) {throw err;}};
+
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) {
+    if (hasOwn.call(obj, key)) keys.push(key);
+  }
+  return keys;
+};
+
+},{"util/":29}],6:[function(require,module,exports){
+
+},{}],7:[function(require,module,exports){
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
+ * @license  MIT
+ */
+
+var base64 = require('base64-js')
+var ieee754 = require('ieee754')
+var isArray = require('is-array')
+
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+Buffer.poolSize = 8192 // not used by this implementation
+
+var rootParent = {}
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Use Object implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * Due to various browser bugs, sometimes the Object implementation will be used even
+ * when the browser supports typed arrays.
+ *
+ * Note:
+ *
+ *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
+ *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
+ *
+ *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property
+ *     on objects.
+ *
+ *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
+ *
+ *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
+ *     incorrect length in some situations.
+
+ * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
+ * get the Object implementation, which is slower but behaves correctly.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = (function () {
+  function Bar () {}
+  try {
+    var arr = new Uint8Array(1)
+    arr.foo = function () { return 42 }
+    arr.constructor = Bar
+    return arr.foo() === 42 && // typed array instances can be augmented
+        arr.constructor === Bar && // constructor can be set
+        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
+        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
+  } catch (e) {
+    return false
+  }
+})()
+
+function kMaxLength () {
+  return Buffer.TYPED_ARRAY_SUPPORT
+    ? 0x7fffffff
+    : 0x3fffffff
+}
+
+/**
+ * Class: Buffer
+ * =============
+ *
+ * The Buffer constructor returns instances of `Uint8Array` that are augmented
+ * with function properties for all the node `Buffer` API functions. We use
+ * `Uint8Array` so that square bracket notation works as expected -- it returns
+ * a single octet.
+ *
+ * By augmenting the instances, we can avoid modifying the `Uint8Array`
+ * prototype.
+ */
+function Buffer (arg) {
+  if (!(this instanceof Buffer)) {
+    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.
+    if (arguments.length > 1) return new Buffer(arg, arguments[1])
+    return new Buffer(arg)
+  }
+
+  this.length = 0
+  this.parent = undefined
+
+  // Common case.
+  if (typeof arg === 'number') {
+    return fromNumber(this, arg)
+  }
+
+  // Slightly less common case.
+  if (typeof arg === 'string') {
+    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')
+  }
+
+  // Unusual.
+  return fromObject(this, arg)
+}
+
+function fromNumber (that, length) {
+  that = allocate(that, length < 0 ? 0 : checked(length) | 0)
+  if (!Buffer.TYPED_ARRAY_SUPPORT) {
+    for (var i = 0; i < length; i++) {
+      that[i] = 0
+    }
+  }
+  return that
+}
+
+function fromString (that, string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'
+
+  // Assumption: byteLength() return value is always < kMaxLength.
+  var length = byteLength(string, encoding) | 0
+  that = allocate(that, length)
+
+  that.write(string, encoding)
+  return that
+}
+
+function fromObject (that, object) {
+  if (Buffer.isBuffer(object)) return fromBuffer(that, object)
+
+  if (isArray(object)) return fromArray(that, object)
+
+  if (object == null) {
+    throw new TypeError('must start with number, buffer, array or string')
+  }
+
+  if (typeof ArrayBuffer !== 'undefined') {
+    if (object.buffer instanceof ArrayBuffer) {
+      return fromTypedArray(that, object)
+    }
+    if (object instanceof ArrayBuffer) {
+      return fromArrayBuffer(that, object)
+    }
+  }
+
+  if (object.length) return fromArrayLike(that, object)
+
+  return fromJsonObject(that, object)
+}
+
+function fromBuffer (that, buffer) {
+  var length = checked(buffer.length) | 0
+  that = allocate(that, length)
+  buffer.copy(that, 0, 0, length)
+  return that
+}
+
+function fromArray (that, array) {
+  var length = checked(array.length) | 0
+  that = allocate(that, length)
+  for (var i = 0; i < length; i += 1) {
+    that[i] = array[i] & 255
+  }
+  return that
+}
+
+// Duplicate of fromArray() to keep fromArray() monomorphic.
+function fromTypedArray (that, array) {
+  var length = checked(array.length) | 0
+  that = allocate(that, length)
+  // Truncating the elements is probably not what people expect from typed
+  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior
+  // of the old Buffer constructor.
+  for (var i = 0; i < length; i += 1) {
+    that[i] = array[i] & 255
+  }
+  return that
+}
+
+function fromArrayBuffer (that, array) {
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    // Return an augmented `Uint8Array` instance, for best performance
+    array.byteLength
+    that = Buffer._augment(new Uint8Array(array))
+  } else {
+    // Fallback: Return an object instance of the Buffer class
+    that = fromTypedArray(that, new Uint8Array(array))
+  }
+  return that
+}
+
+function fromArrayLike (that, array) {
+  var length = checked(array.length) | 0
+  that = allocate(that, length)
+  for (var i = 0; i < length; i += 1) {
+    that[i] = array[i] & 255
+  }
+  return that
+}
+
+// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.
+// Returns a zero-length buffer for inputs that don't conform to the spec.
+function fromJsonObject (that, object) {
+  var array
+  var length = 0
+
+  if (object.type === 'Buffer' && isArray(object.data)) {
+    array = object.data
+    length = checked(array.length) | 0
+  }
+  that = allocate(that, length)
+
+  for (var i = 0; i < length; i += 1) {
+    that[i] = array[i] & 255
+  }
+  return that
+}
+
+function allocate (that, length) {
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    // Return an augmented `Uint8Array` instance, for best performance
+    that = Buffer._augment(new Uint8Array(length))
+  } else {
+    // Fallback: Return an object instance of the Buffer class
+    that.length = length
+    that._isBuffer = true
+  }
+
+  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1
+  if (fromPool) that.parent = rootParent
+
+  return that
+}
+
+function checked (length) {
+  // Note: cannot use `length < kMaxLength` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= kMaxLength()) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
+  }
+  return length | 0
+}
+
+function SlowBuffer (subject, encoding) {
+  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)
+
+  var buf = new Buffer(subject, encoding)
+  delete buf.parent
+  return buf
+}
+
+Buffer.isBuffer = function isBuffer (b) {
+  return !!(b != null && b._isBuffer)
+}
+
+Buffer.compare = function compare (a, b) {
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError('Arguments must be Buffers')
+  }
+
+  if (a === b) return 0
+
+  var x = a.length
+  var y = b.length
+
+  var i = 0
+  var len = Math.min(x, y)
+  while (i < len) {
+    if (a[i] !== b[i]) break
+
+    ++i
+  }
+
+  if (i !== len) {
+    x = a[i]
+    y = b[i]
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'binary':
+    case 'base64':
+    case 'raw':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
+
+Buffer.concat = function concat (list, length) {
+  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')
+
+  if (list.length === 0) {
+    return new Buffer(0)
+  }
+
+  var i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; i++) {
+      length += list[i].length
+    }
+  }
+
+  var buf = new Buffer(length)
+  var pos = 0
+  for (i = 0; i < list.length; i++) {
+    var item = list[i]
+    item.copy(buf, pos)
+    pos += item.length
+  }
+  return buf
+}
+
+function byteLength (string, encoding) {
+  if (typeof string !== 'string') string = '' + string
+
+  var len = string.length
+  if (len === 0) return 0
+
+  // Use a for loop to avoid recursion
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'binary':
+      // Deprecated
+      case 'raw':
+      case 'raws':
+        return len
+      case 'utf8':
+      case 'utf-8':
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) return utf8ToBytes(string).length // assume utf8
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+Buffer.byteLength = byteLength
+
+// pre-set for values that may exist in the future
+Buffer.prototype.length = undefined
+Buffer.prototype.parent = undefined
+
+function slowToString (encoding, start, end) {
+  var loweredCase = false
+
+  start = start | 0
+  end = end === undefined || end === Infinity ? this.length : end | 0
+
+  if (!encoding) encoding = 'utf8'
+  if (start < 0) start = 0
+  if (end > this.length) end = this.length
+  if (end <= start) return ''
+
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
+
+      case 'ascii':
+        return asciiSlice(this, start, end)
+
+      case 'binary':
+        return binarySlice(this, start, end)
+
+      case 'base64':
+        return base64Slice(this, start, end)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+Buffer.prototype.toString = function toString () {
+  var length = this.length | 0
+  if (length === 0) return ''
+  if (arguments.length === 0) return utf8Slice(this, 0, length)
+  return slowToString.apply(this, arguments)
+}
+
+Buffer.prototype.equals = function equals (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return true
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.inspect = function inspect () {
+  var str = ''
+  var max = exports.INSPECT_MAX_BYTES
+  if (this.length > 0) {
+    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
+    if (this.length > max) str += ' ... '
+  }
+  return '<Buffer ' + str + '>'
+}
+
+Buffer.prototype.compare = function compare (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return 0
+  return Buffer.compare(this, b)
+}
+
+Buffer.prototype.indexOf = function indexOf (val, byteOffset) {
+  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff
+  else if (byteOffset < -0x80000000) byteOffset = -0x80000000
+  byteOffset >>= 0
+
+  if (this.length === 0) return -1
+  if (byteOffset >= this.length) return -1
+
+  // Negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)
+
+  if (typeof val === 'string') {
+    if (val.length === 0) return -1 // special case: looking for empty string always fails
+    return String.prototype.indexOf.call(this, val, byteOffset)
+  }
+  if (Buffer.isBuffer(val)) {
+    return arrayIndexOf(this, val, byteOffset)
+  }
+  if (typeof val === 'number') {
+    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
+      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
+    }
+    return arrayIndexOf(this, [ val ], byteOffset)
+  }
+
+  function arrayIndexOf (arr, val, byteOffset) {
+    var foundIndex = -1
+    for (var i = 0; byteOffset + i < arr.length; i++) {
+      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex
+      } else {
+        foundIndex = -1
+      }
+    }
+    return -1
+  }
+
+  throw new TypeError('val must be string, number or Buffer')
+}
+
+// `get` is deprecated
+Buffer.prototype.get = function get (offset) {
+  console.log('.get() is deprecated. Access using array indexes instead.')
+  return this.readUInt8(offset)
+}
+
+// `set` is deprecated
+Buffer.prototype.set = function set (v, offset) {
+  console.log('.set() is deprecated. Access using array indexes instead.')
+  return this.writeUInt8(v, offset)
+}
+
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  var remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+
+  // must be an even number of digits
+  var strLen = string.length
+  if (strLen % 2 !== 0) throw new Error('Invalid hex string')
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  for (var i = 0; i < length; i++) {
+    var parsed = parseInt(string.substr(i * 2, 2), 16)
+    if (isNaN(parsed)) throw new Error('Invalid hex string')
+    buf[offset + i] = parsed
+  }
+  return i
+}
+
+function utf8Write (buf, string, offset, length) {
+  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+function asciiWrite (buf, string, offset, length) {
+  return blitBuffer(asciiToBytes(string), buf, offset, length)
+}
+
+function binaryWrite (buf, string, offset, length) {
+  return asciiWrite(buf, string, offset, length)
+}
+
+function base64Write (buf, string, offset, length) {
+  return blitBuffer(base64ToBytes(string), buf, offset, length)
+}
+
+function ucs2Write (buf, string, offset, length) {
+  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+Buffer.prototype.write = function write (string, offset, length, encoding) {
+  // Buffer#write(string)
+  if (offset === undefined) {
+    encoding = 'utf8'
+    length = this.length
+    offset = 0
+  // Buffer#write(string, encoding)
+  } else if (length === undefined && typeof offset === 'string') {
+    encoding = offset
+    length = this.length
+    offset = 0
+  // Buffer#write(string, offset[, length][, encoding])
+  } else if (isFinite(offset)) {
+    offset = offset | 0
+    if (isFinite(length)) {
+      length = length | 0
+      if (encoding === undefined) encoding = 'utf8'
+    } else {
+      encoding = length
+      length = undefined
+    }
+  // legacy write(string, encoding, offset, length) - remove in v0.13
+  } else {
+    var swap = encoding
+    encoding = offset
+    offset = length | 0
+    length = swap
+  }
+
+  var remaining = this.length - offset
+  if (length === undefined || length > remaining) length = remaining
+
+  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
+    throw new RangeError('attempt to write outside buffer bounds')
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'hex':
+        return hexWrite(this, string, offset, length)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Write(this, string, offset, length)
+
+      case 'ascii':
+        return asciiWrite(this, string, offset, length)
+
+      case 'binary':
+        return binaryWrite(this, string, offset, length)
+
+      case 'base64':
+        // Warning: maxLength not taken into account in base64Write
+        return base64Write(this, string, offset, length)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return ucs2Write(this, string, offset, length)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+Buffer.prototype.toJSON = function toJSON () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
+
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
+  } else {
+    return base64.fromByteArray(buf.slice(start, end))
+  }
+}
+
+function utf8Slice (buf, start, end) {
+  end = Math.min(buf.length, end)
+  var firstByte
+  var secondByte
+  var thirdByte
+  var fourthByte
+  var bytesPerSequence
+  var tempCodePoint
+  var codePoint
+  var res = []
+  var i = start
+
+  for (; i < end; i += bytesPerSequence) {
+    firstByte = buf[i]
+    codePoint = 0xFFFD
+
+    if (firstByte > 0xEF) {
+      bytesPerSequence = 4
+    } else if (firstByte > 0xDF) {
+      bytesPerSequence = 3
+    } else if (firstByte > 0xBF) {
+      bytesPerSequence = 2
+    } else {
+      bytesPerSequence = 1
+    }
+
+    if (i + bytesPerSequence <= end) {
+      switch (bytesPerSequence) {
+        case 1:
+          if (firstByte < 0x80) {
+            codePoint = firstByte
+          }
+          break
+        case 2:
+          secondByte = buf[i + 1]
+          if ((secondByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
+            if (tempCodePoint > 0x7F) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 3:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
+            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 4:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          fourthByte = buf[i + 3]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
+            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
+              codePoint = tempCodePoint
+            }
+          }
+      }
+    }
+
+    if (codePoint === 0xFFFD) {
+      // we generated an invalid codePoint so make sure to only advance by 1 byte
+      bytesPerSequence = 1
+    } else if (codePoint > 0xFFFF) {
+      // encode to utf16 (surrogate pair dance)
+      codePoint -= 0x10000
+      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
+      codePoint = 0xDC00 | codePoint & 0x3FF
+    }
+
+    res.push(codePoint)
+  }
+
+  return String.fromCharCode.apply(String, res)
+}
+
+function asciiSlice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; i++) {
+    ret += String.fromCharCode(buf[i] & 0x7F)
+  }
+  return ret
+}
+
+function binarySlice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; i++) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
+}
+
+function hexSlice (buf, start, end) {
+  var len = buf.length
+
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
+
+  var out = ''
+  for (var i = start; i < end; i++) {
+    out += toHex(buf[i])
+  }
+  return out
+}
+
+function utf16leSlice (buf, start, end) {
+  var bytes = buf.slice(start, end)
+  var res = ''
+  for (var i = 0; i < bytes.length; i += 2) {
+    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
+  }
+  return res
+}
+
+Buffer.prototype.slice = function slice (start, end) {
+  var len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
+
+  if (start < 0) {
+    start += len
+    if (start < 0) start = 0
+  } else if (start > len) {
+    start = len
+  }
+
+  if (end < 0) {
+    end += len
+    if (end < 0) end = 0
+  } else if (end > len) {
+    end = len
+  }
+
+  if (end < start) end = start
+
+  var newBuf
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    newBuf = Buffer._augment(this.subarray(start, end))
+  } else {
+    var sliceLen = end - start
+    newBuf = new Buffer(sliceLen, undefined)
+    for (var i = 0; i < sliceLen; i++) {
+      newBuf[i] = this[i + start]
+    }
+  }
+
+  if (newBuf.length) newBuf.parent = this.parent || this
+
+  return newBuf
+}
+
+/*
+ * Need to make sure that buffer isn't trying to write out of bounds.
+ */
+function checkOffset (offset, ext, length) {
+  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
+  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
+}
+
+Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
+  offset = offset | 0
+  byteLength = byteLength | 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
+  offset = offset | 0
+  byteLength = byteLength | 0
+  if (!noAssert) {
+    checkOffset(offset, byteLength, this.length)
+  }
+
+  var val = this[offset + --byteLength]
+  var mul = 1
+  while (byteLength > 0 && (mul *= 0x100)) {
+    val += this[offset + --byteLength] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  return this[offset]
+}
+
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return this[offset] | (this[offset + 1] << 8)
+}
+
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return (this[offset] << 8) | this[offset + 1]
+}
+
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return ((this[offset]) |
+      (this[offset + 1] << 8) |
+      (this[offset + 2] << 16)) +
+      (this[offset + 3] * 0x1000000)
+}
+
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] * 0x1000000) +
+    ((this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    this[offset + 3])
+}
+
+Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
+  offset = offset | 0
+  byteLength = byteLength | 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
+  offset = offset | 0
+  byteLength = byteLength | 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var i = byteLength
+  var mul = 1
+  var val = this[offset + --i]
+  while (i > 0 && (mul *= 0x100)) {
+    val += this[offset + --i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  if (!(this[offset] & 0x80)) return (this[offset])
+  return ((0xff - this[offset] + 1) * -1)
+}
+
+Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset] | (this[offset + 1] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset + 1] | (this[offset] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset]) |
+    (this[offset + 1] << 8) |
+    (this[offset + 2] << 16) |
+    (this[offset + 3] << 24)
+}
+
+Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] << 24) |
+    (this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    (this[offset + 3])
+}
+
+Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, true, 23, 4)
+}
+
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, false, 23, 4)
+}
+
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, true, 52, 8)
+}
+
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, false, 52, 8)
+}
+
+function checkInt (buf, value, offset, ext, max, min) {
+  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')
+  if (value > max || value < min) throw new RangeError('value is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('index out of range')
+}
+
+Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset | 0
+  byteLength = byteLength | 0
+  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
+
+  var mul = 1
+  var i = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset | 0
+  byteLength = byteLength | 0
+  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
+
+  var i = byteLength - 1
+  var mul = 1
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
+  this[offset] = value
+  return offset + 1
+}
+
+function objectWriteUInt16 (buf, value, offset, littleEndian) {
+  if (value < 0) value = 0xffff + value + 1
+  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {
+    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
+      (littleEndian ? i : 1 - i) * 8
+  }
+}
+
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset] = value
+    this[offset + 1] = (value >>> 8)
+  } else {
+    objectWriteUInt16(this, value, offset, true)
+  }
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset] = (value >>> 8)
+    this[offset + 1] = value
+  } else {
+    objectWriteUInt16(this, value, offset, false)
+  }
+  return offset + 2
+}
+
+function objectWriteUInt32 (buf, value, offset, littleEndian) {
+  if (value < 0) value = 0xffffffff + value + 1
+  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {
+    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
+  }
+}
+
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset + 3] = (value >>> 24)
+    this[offset + 2] = (value >>> 16)
+    this[offset + 1] = (value >>> 8)
+    this[offset] = value
+  } else {
+    objectWriteUInt32(this, value, offset, true)
+  }
+  return offset + 4
+}
+
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset] = (value >>> 24)
+    this[offset + 1] = (value >>> 16)
+    this[offset + 2] = (value >>> 8)
+    this[offset + 3] = value
+  } else {
+    objectWriteUInt32(this, value, offset, false)
+  }
+  return offset + 4
+}
+
+Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) {
+    var limit = Math.pow(2, 8 * byteLength - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = 0
+  var mul = 1
+  var sub = value < 0 ? 1 : 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) {
+    var limit = Math.pow(2, 8 * byteLength - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = byteLength - 1
+  var mul = 1
+  var sub = value < 0 ? 1 : 0
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
+  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
+  if (value < 0) value = 0xff + value + 1
+  this[offset] = value
+  return offset + 1
+}
+
+Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset] = value
+    this[offset + 1] = (value >>> 8)
+  } else {
+    objectWriteUInt16(this, value, offset, true)
+  }
+  return offset + 2
+}
+
+Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset] = (value >>> 8)
+    this[offset + 1] = value
+  } else {
+    objectWriteUInt16(this, value, offset, false)
+  }
+  return offset + 2
+}
+
+Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset] = value
+    this[offset + 1] = (value >>> 8)
+    this[offset + 2] = (value >>> 16)
+    this[offset + 3] = (value >>> 24)
+  } else {
+    objectWriteUInt32(this, value, offset, true)
+  }
+  return offset + 4
+}
+
+Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset | 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (value < 0) value = 0xffffffff + value + 1
+  if (Buffer.TYPED_ARRAY_SUPPORT) {
+    this[offset] = (value >>> 24)
+    this[offset + 1] = (value >>> 16)
+    this[offset + 2] = (value >>> 8)
+    this[offset + 3] = value
+  } else {
+    objectWriteUInt32(this, value, offset, false)
+  }
+  return offset + 4
+}
+
+function checkIEEE754 (buf, value, offset, ext, max, min) {
+  if (value > max || value < min) throw new RangeError('value is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('index out of range')
+  if (offset < 0) throw new RangeError('index out of range')
+}
+
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  var len = end - start
+  var i
+
+  if (this === target && start < targetStart && targetStart < end) {
+    // descending copy from end
+    for (i = len - 1; i >= 0; i--) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
+    // ascending copy from start
+    for (i = 0; i < len; i++) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else {
+    target._set(this.subarray(start, start + len), targetStart)
+  }
+
+  return len
+}
+
+// fill(value, start=0, end=buffer.length)
+Buffer.prototype.fill = function fill (value, start, end) {
+  if (!value) value = 0
+  if (!start) start = 0
+  if (!end) end = this.length
+
+  if (end < start) throw new RangeError('end < start')
+
+  // Fill 0 bytes; we're done
+  if (end === start) return
+  if (this.length === 0) return
+
+  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')
+  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')
+
+  var i
+  if (typeof value === 'number') {
+    for (i = start; i < end; i++) {
+      this[i] = value
+    }
+  } else {
+    var bytes = utf8ToBytes(value.toString())
+    var len = bytes.length
+    for (i = start; i < end; i++) {
+      this[i] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+/**
+ * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
+ * Added in Node 0.12. Only available in browsers that support ArrayBuffer.
+ */
+Buffer.prototype.toArrayBuffer = function toArrayBuffer () {
+  if (typeof Uint8Array !== 'undefined') {
+    if (Buffer.TYPED_ARRAY_SUPPORT) {
+      return (new Buffer(this)).buffer
+    } else {
+      var buf = new Uint8Array(this.length)
+      for (var i = 0, len = buf.length; i < len; i += 1) {
+        buf[i] = this[i]
+      }
+      return buf.buffer
+    }
+  } else {
+    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')
+  }
+}
+
+// HELPER FUNCTIONS
+// ================
+
+var BP = Buffer.prototype
+
+/**
+ * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
+ */
+Buffer._augment = function _augment (arr) {
+  arr.constructor = Buffer
+  arr._isBuffer = true
+
+  // save reference to original Uint8Array set method before overwriting
+  arr._set = arr.set
+
+  // deprecated
+  arr.get = BP.get
+  arr.set = BP.set
+
+  arr.write = BP.write
+  arr.toString = BP.toString
+  arr.toLocaleString = BP.toString
+  arr.toJSON = BP.toJSON
+  arr.equals = BP.equals
+  arr.compare = BP.compare
+  arr.indexOf = BP.indexOf
+  arr.copy = BP.copy
+  arr.slice = BP.slice
+  arr.readUIntLE = BP.readUIntLE
+  arr.readUIntBE = BP.readUIntBE
+  arr.readUInt8 = BP.readUInt8
+  arr.readUInt16LE = BP.readUInt16LE
+  arr.readUInt16BE = BP.readUInt16BE
+  arr.readUInt32LE = BP.readUInt32LE
+  arr.readUInt32BE = BP.readUInt32BE
+  arr.readIntLE = BP.readIntLE
+  arr.readIntBE = BP.readIntBE
+  arr.readInt8 = BP.readInt8
+  arr.readInt16LE = BP.readInt16LE
+  arr.readInt16BE = BP.readInt16BE
+  arr.readInt32LE = BP.readInt32LE
+  arr.readInt32BE = BP.readInt32BE
+  arr.readFloatLE = BP.readFloatLE
+  arr.readFloatBE = BP.readFloatBE
+  arr.readDoubleLE = BP.readDoubleLE
+  arr.readDoubleBE = BP.readDoubleBE
+  arr.writeUInt8 = BP.writeUInt8
+  arr.writeUIntLE = BP.writeUIntLE
+  arr.writeUIntBE = BP.writeUIntBE
+  arr.writeUInt16LE = BP.writeUInt16LE
+  arr.writeUInt16BE = BP.writeUInt16BE
+  arr.writeUInt32LE = BP.writeUInt32LE
+  arr.writeUInt32BE = BP.writeUInt32BE
+  arr.writeIntLE = BP.writeIntLE
+  arr.writeIntBE = BP.writeIntBE
+  arr.writeInt8 = BP.writeInt8
+  arr.writeInt16LE = BP.writeInt16LE
+  arr.writeInt16BE = BP.writeInt16BE
+  arr.writeInt32LE = BP.writeInt32LE
+  arr.writeInt32BE = BP.writeInt32BE
+  arr.writeFloatLE = BP.writeFloatLE
+  arr.writeFloatBE = BP.writeFloatBE
+  arr.writeDoubleLE = BP.writeDoubleLE
+  arr.writeDoubleBE = BP.writeDoubleBE
+  arr.fill = BP.fill
+  arr.inspect = BP.inspect
+  arr.toArrayBuffer = BP.toArrayBuffer
+
+  return arr
+}
+
+var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function stringtrim (str) {
+  if (str.trim) return str.trim()
+  return str.replace(/^\s+|\s+$/g, '')
+}
+
+function toHex (n) {
+  if (n < 16) return '0' + n.toString(16)
+  return n.toString(16)
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  var codePoint
+  var length = string.length
+  var leadSurrogate = null
+  var bytes = []
+
+  for (var i = 0; i < length; i++) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00 | 0x10000
+
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; i++) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; i++) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; i++) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+},{"base64-js":8,"ieee754":9,"is-array":10}],8:[function(require,module,exports){
+var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+
+;(function (exports) {
+	'use strict';
+
+  var Arr = (typeof Uint8Array !== 'undefined')
+    ? Uint8Array
+    : Array
+
+	var PLUS   = '+'.charCodeAt(0)
+	var SLASH  = '/'.charCodeAt(0)
+	var NUMBER = '0'.charCodeAt(0)
+	var LOWER  = 'a'.charCodeAt(0)
+	var UPPER  = 'A'.charCodeAt(0)
+	var PLUS_URL_SAFE = '-'.charCodeAt(0)
+	var SLASH_URL_SAFE = '_'.charCodeAt(0)
+
+	function decode (elt) {
+		var code = elt.charCodeAt(0)
+		if (code === PLUS ||
+		    code === PLUS_URL_SAFE)
+			return 62 // '+'
+		if (code === SLASH ||
+		    code === SLASH_URL_SAFE)
+			return 63 // '/'
+		if (code < NUMBER)
+			return -1 //no match
+		if (code < NUMBER + 10)
+			return code - NUMBER + 26 + 26
+		if (code < UPPER + 26)
+			return code - UPPER
+		if (code < LOWER + 26)
+			return code - LOWER + 26
+	}
+
+	function b64ToByteArray (b64) {
+		var i, j, l, tmp, placeHolders, arr
+
+		if (b64.length % 4 > 0) {
+			throw new Error('Invalid string. Length must be a multiple of 4')
+		}
+
+		// the number of equal signs (place holders)
+		// if there are two placeholders, than the two characters before it
+		// represent one byte
+		// if there is only one, then the three characters before it represent 2 bytes
+		// this is just a cheap hack to not do indexOf twice
+		var len = b64.length
+		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
+
+		// base64 is 4/3 + up to two characters of the original data
+		arr = new Arr(b64.length * 3 / 4 - placeHolders)
+
+		// if there are placeholders, only get up to the last complete 4 chars
+		l = placeHolders > 0 ? b64.length - 4 : b64.length
+
+		var L = 0
+
+		function push (v) {
+			arr[L++] = v
+		}
+
+		for (i = 0, j = 0; i < l; i += 4, j += 3) {
+			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
+			push((tmp & 0xFF0000) >> 16)
+			push((tmp & 0xFF00) >> 8)
+			push(tmp & 0xFF)
+		}
+
+		if (placeHolders === 2) {
+			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
+			push(tmp & 0xFF)
+		} else if (placeHolders === 1) {
+			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
+			push((tmp >> 8) & 0xFF)
+			push(tmp & 0xFF)
+		}
+
+		return arr
+	}
+
+	function uint8ToBase64 (uint8) {
+		var i,
+			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
+			output = "",
+			temp, length
+
+		function encode (num) {
+			return lookup.charAt(num)
+		}
+
+		function tripletToBase64 (num) {
+			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
+		}
+
+		// go through the array every three bytes, we'll deal with trailing stuff later
+		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
+			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
+			output += tripletToBase64(temp)
+		}
+
+		// pad the end with zeros, but make sure to not forget the extra bytes
+		switch (extraBytes) {
+			case 1:
+				temp = uint8[uint8.length - 1]
+				output += encode(temp >> 2)
+				output += encode((temp << 4) & 0x3F)
+				output += '=='
+				break
+			case 2:
+				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
+				output += encode(temp >> 10)
+				output += encode((temp >> 4) & 0x3F)
+				output += encode((temp << 2) & 0x3F)
+				output += '='
+				break
+		}
+
+		return output
+	}
+
+	exports.toByteArray = b64ToByteArray
+	exports.fromByteArray = uint8ToBase64
+}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
+
+},{}],9:[function(require,module,exports){
+exports.read = function (buffer, offset, isLE, mLen, nBytes) {
+  var e, m
+  var eLen = nBytes * 8 - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var nBits = -7
+  var i = isLE ? (nBytes - 1) : 0
+  var d = isLE ? -1 : 1
+  var s = buffer[offset + i]
+
+  i += d
+
+  e = s & ((1 << (-nBits)) - 1)
+  s >>= (-nBits)
+  nBits += eLen
+  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+
+  m = e & ((1 << (-nBits)) - 1)
+  e >>= (-nBits)
+  nBits += mLen
+  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+
+  if (e === 0) {
+    e = 1 - eBias
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity)
+  } else {
+    m = m + Math.pow(2, mLen)
+    e = e - eBias
+  }
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
+}
+
+exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c
+  var eLen = nBytes * 8 - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
+  var i = isLE ? 0 : (nBytes - 1)
+  var d = isLE ? 1 : -1
+  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
+
+  value = Math.abs(value)
+
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0
+    e = eMax
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2)
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--
+      c *= 2
+    }
+    if (e + eBias >= 1) {
+      value += rt / c
+    } else {
+      value += rt * Math.pow(2, 1 - eBias)
+    }
+    if (value * c >= 2) {
+      e++
+      c /= 2
+    }
+
+    if (e + eBias >= eMax) {
+      m = 0
+      e = eMax
+    } else if (e + eBias >= 1) {
+      m = (value * c - 1) * Math.pow(2, mLen)
+      e = e + eBias
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
+      e = 0
+    }
+  }
+
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+
+  e = (e << mLen) | m
+  eLen += mLen
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+
+  buffer[offset + i - d] |= s * 128
+}
+
+},{}],10:[function(require,module,exports){
+
+/**
+ * isArray
+ */
+
+var isArray = Array.isArray;
+
+/**
+ * toString
+ */
+
+var str = Object.prototype.toString;
+
+/**
+ * Whether or not the given `val`
+ * is an array.
+ *
+ * example:
+ *
+ *        isArray([]);
+ *        // > true
+ *        isArray(arguments);
+ *        // > false
+ *        isArray('');
+ *        // > false
+ *
+ * @param {mixed} val
+ * @return {bool}
+ */
+
+module.exports = isArray || function (val) {
+  return !! val && '[object Array]' == str.call(val);
+};
+
+},{}],11:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+function EventEmitter() {
+  this._events = this._events || {};
+  this._maxListeners = this._maxListeners || undefined;
+}
+module.exports = EventEmitter;
+
+// Backwards-compat with node 0.10.x
+EventEmitter.EventEmitter = EventEmitter;
+
+EventEmitter.prototype._events = undefined;
+EventEmitter.prototype._maxListeners = undefined;
+
+// By default EventEmitters will print a warning if more than 10 listeners are
+// added to it. This is a useful default which helps finding memory leaks.
+EventEmitter.defaultMaxListeners = 10;
+
+// Obviously not all Emitters should be limited to 10. This function allows
+// that to be increased. Set to zero for unlimited.
+EventEmitter.prototype.setMaxListeners = function(n) {
+  if (!isNumber(n) || n < 0 || isNaN(n))
+    throw TypeError('n must be a positive number');
+  this._maxListeners = n;
+  return this;
+};
+
+EventEmitter.prototype.emit = function(type) {
+  var er, handler, len, args, i, listeners;
+
+  if (!this._events)
+    this._events = {};
+
+  // If there is no 'error' event listener then throw.
+  if (type === 'error') {
+    if (!this._events.error ||
+        (isObject(this._events.error) && !this._events.error.length)) {
+      er = arguments[1];
+      if (er instanceof Error) {
+        throw er; // Unhandled 'error' event
+      }
+      throw TypeError('Uncaught, unspecified "error" event.');
+    }
+  }
+
+  handler = this._events[type];
+
+  if (isUndefined(handler))
+    return false;
+
+  if (isFunction(handler)) {
+    switch (arguments.length) {
+      // fast cases
+      case 1:
+        handler.call(this);
+        break;
+      case 2:
+        handler.call(this, arguments[1]);
+        break;
+      case 3:
+        handler.call(this, arguments[1], arguments[2]);
+        break;
+      // slower
+      default:
+        len = arguments.length;
+        args = new Array(len - 1);
+        for (i = 1; i < len; i++)
+          args[i - 1] = arguments[i];
+        handler.apply(this, args);
+    }
+  } else if (isObject(handler)) {
+    len = arguments.length;
+    args = new Array(len - 1);
+    for (i = 1; i < len; i++)
+      args[i - 1] = arguments[i];
+
+    listeners = handler.slice();
+    len = listeners.length;
+    for (i = 0; i < len; i++)
+      listeners[i].apply(this, args);
+  }
+
+  return true;
+};
+
+EventEmitter.prototype.addListener = function(type, listener) {
+  var m;
+
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
+
+  if (!this._events)
+    this._events = {};
+
+  // To avoid recursion in the case that type === "newListener"! Before
+  // adding it to the listeners, first emit "newListener".
+  if (this._events.newListener)
+    this.emit('newListener', type,
+              isFunction(listener.listener) ?
+              listener.listener : listener);
+
+  if (!this._events[type])
+    // Optimize the case of one listener. Don't need the extra array object.
+    this._events[type] = listener;
+  else if (isObject(this._events[type]))
+    // If we've already got an array, just append.
+    this._events[type].push(listener);
+  else
+    // Adding the second element, need to change to array.
+    this._events[type] = [this._events[type], listener];
+
+  // Check for listener leak
+  if (isObject(this._events[type]) && !this._events[type].warned) {
+    var m;
+    if (!isUndefined(this._maxListeners)) {
+      m = this._maxListeners;
+    } else {
+      m = EventEmitter.defaultMaxListeners;
+    }
+
+    if (m && m > 0 && this._events[type].length > m) {
+      this._events[type].warned = true;
+      console.error('(node) warning: possible EventEmitter memory ' +
+                    'leak detected. %d listeners added. ' +
+                    'Use emitter.setMaxListeners() to increase limit.',
+                    this._events[type].length);
+      if (typeof console.trace === 'function') {
+        // not supported in IE 10
+        console.trace();
+      }
+    }
+  }
+
+  return this;
+};
+
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
+
+EventEmitter.prototype.once = function(type, listener) {
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
+
+  var fired = false;
+
+  function g() {
+    this.removeListener(type, g);
+
+    if (!fired) {
+      fired = true;
+      listener.apply(this, arguments);
+    }
+  }
+
+  g.listener = listener;
+  this.on(type, g);
+
+  return this;
+};
+
+// emits a 'removeListener' event iff the listener was removed
+EventEmitter.prototype.removeListener = function(type, listener) {
+  var list, position, length, i;
+
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
+
+  if (!this._events || !this._events[type])
+    return this;
+
+  list = this._events[type];
+  length = list.length;
+  position = -1;
+
+  if (list === listener ||
+      (isFunction(list.listener) && list.listener === listener)) {
+    delete this._events[type];
+    if (this._events.removeListener)
+      this.emit('removeListener', type, listener);
+
+  } else if (isObject(list)) {
+    for (i = length; i-- > 0;) {
+      if (list[i] === listener ||
+          (list[i].listener && list[i].listener === listener)) {
+        position = i;
+        break;
+      }
+    }
+
+    if (position < 0)
+      return this;
+
+    if (list.length === 1) {
+      list.length = 0;
+      delete this._events[type];
+    } else {
+      list.splice(position, 1);
+    }
+
+    if (this._events.removeListener)
+      this.emit('removeListener', type, listener);
+  }
+
+  return this;
+};
+
+EventEmitter.prototype.removeAllListeners = function(type) {
+  var key, listeners;
+
+  if (!this._events)
+    return this;
+
+  // not listening for removeListener, no need to emit
+  if (!this._events.removeListener) {
+    if (arguments.length === 0)
+      this._events = {};
+    else if (this._events[type])
+      delete this._events[type];
+    return this;
+  }
+
+  // emit removeListener for all listeners on all events
+  if (arguments.length === 0) {
+    for (key in this._events) {
+      if (key === 'removeListener') continue;
+      this.removeAllListeners(key);
+    }
+    this.removeAllListeners('removeListener');
+    this._events = {};
+    return this;
+  }
+
+  listeners = this._events[type];
+
+  if (isFunction(listeners)) {
+    this.removeListener(type, listeners);
+  } else {
+    // LIFO order
+    while (listeners.length)
+      this.removeListener(type, listeners[listeners.length - 1]);
+  }
+  delete this._events[type];
+
+  return this;
+};
+
+EventEmitter.prototype.listeners = function(type) {
+  var ret;
+  if (!this._events || !this._events[type])
+    ret = [];
+  else if (isFunction(this._events[type]))
+    ret = [this._events[type]];
+  else
+    ret = this._events[type].slice();
+  return ret;
+};
+
+EventEmitter.listenerCount = function(emitter, type) {
+  var ret;
+  if (!emitter._events || !emitter._events[type])
+    ret = 0;
+  else if (isFunction(emitter._events[type]))
+    ret = 1;
+  else
+    ret = emitter._events[type].length;
+  return ret;
+};
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+
+},{}],12:[function(require,module,exports){
+if (typeof Object.create === 'function') {
+  // implementation from standard node.js 'util' module
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    ctor.prototype = Object.create(superCtor.prototype, {
+      constructor: {
+        value: ctor,
+        enumerable: false,
+        writable: true,
+        configurable: true
+      }
+    });
+  };
+} else {
+  // old school shim for old browsers
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    var TempCtor = function () {}
+    TempCtor.prototype = superCtor.prototype
+    ctor.prototype = new TempCtor()
+    ctor.prototype.constructor = ctor
+  }
+}
+
+},{}],13:[function(require,module,exports){
+module.exports = Array.isArray || function (arr) {
+  return Object.prototype.toString.call(arr) == '[object Array]';
+};
+
+},{}],14:[function(require,module,exports){
+// shim for using process in browser
+
+var process = module.exports = {};
+var queue = [];
+var draining = false;
+var currentQueue;
+var queueIndex = -1;
+
+function cleanUpNextTick() {
+    draining = false;
+    if (currentQueue.length) {
+        queue = currentQueue.concat(queue);
+    } else {
+        queueIndex = -1;
+    }
+    if (queue.length) {
+        drainQueue();
+    }
+}
+
+function drainQueue() {
+    if (draining) {
+        return;
+    }
+    var timeout = setTimeout(cleanUpNextTick);
+    draining = true;
+
+    var len = queue.length;
+    while(len) {
+        currentQueue = queue;
+        queue = [];
+        while (++queueIndex < len) {
+            currentQueue[queueIndex].run();
+        }
+        queueIndex = -1;
+        len = queue.length;
+    }
+    currentQueue = null;
+    draining = false;
+    clearTimeout(timeout);
+}
+
+process.nextTick = function (fun) {
+    var args = new Array(arguments.length - 1);
+    if (arguments.length > 1) {
+        for (var i = 1; i < arguments.length; i++) {
+            args[i - 1] = arguments[i];
+        }
+    }
+    queue.push(new Item(fun, args));
+    if (queue.length === 1 && !draining) {
+        setTimeout(drainQueue, 0);
+    }
+};
+
+// v8 likes predictible objects
+function Item(fun, array) {
+    this.fun = fun;
+    this.array = array;
+}
+Item.prototype.run = function () {
+    this.fun.apply(null, this.array);
+};
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+process.version = ''; // empty string to avoid regexp issues
+process.versions = {};
+
+function noop() {}
+
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
+
+process.binding = function (name) {
+    throw new Error('process.binding is not supported');
+};
+
+// TODO(shtylman)
+process.cwd = function () { return '/' };
+process.chdir = function (dir) {
+    throw new Error('process.chdir is not supported');
+};
+process.umask = function() { return 0; };
+
+},{}],15:[function(require,module,exports){
+module.exports = require("./lib/_stream_duplex.js")
+
+},{"./lib/_stream_duplex.js":16}],16:[function(require,module,exports){
+(function (process){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototypal inheritance, this class
+// prototypally inherits from Readable, and then parasitically from
+// Writable.
+
+module.exports = Duplex;
+
+/*<replacement>*/
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) keys.push(key);
+  return keys;
+}
+/*</replacement>*/
+
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+var Readable = require('./_stream_readable');
+var Writable = require('./_stream_writable');
+
+util.inherits(Duplex, Readable);
+
+forEach(objectKeys(Writable.prototype), function(method) {
+  if (!Duplex.prototype[method])
+    Duplex.prototype[method] = Writable.prototype[method];
+});
+
+function Duplex(options) {
+  if (!(this instanceof Duplex))
+    return new Duplex(options);
+
+  Readable.call(this, options);
+  Writable.call(this, options);
+
+  if (options && options.readable === false)
+    this.readable = false;
+
+  if (options && options.writable === false)
+    this.writable = false;
+
+  this.allowHalfOpen = true;
+  if (options && options.allowHalfOpen === false)
+    this.allowHalfOpen = false;
+
+  this.once('end', onend);
+}
+
+// the no-half-open enforcer
+function onend() {
+  // if we allow half-open state, or if the writable side ended,
+  // then we're ok.
+  if (this.allowHalfOpen || this._writableState.ended)
+    return;
+
+  // no more data can be written.
+  // But allow more writes to happen in this tick.
+  process.nextTick(this.end.bind(this));
+}
+
+function forEach (xs, f) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    f(xs[i], i);
+  }
+}
+
+}).call(this,require('_process'))
+},{"./_stream_readable":18,"./_stream_writable":20,"_process":14,"core-util-is":21,"inherits":12}],17:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
+
+module.exports = PassThrough;
+
+var Transform = require('./_stream_transform');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+util.inherits(PassThrough, Transform);
+
+function PassThrough(options) {
+  if (!(this instanceof PassThrough))
+    return new PassThrough(options);
+
+  Transform.call(this, options);
+}
+
+PassThrough.prototype._transform = function(chunk, encoding, cb) {
+  cb(null, chunk);
+};
+
+},{"./_stream_transform":19,"core-util-is":21,"inherits":12}],18:[function(require,module,exports){
+(function (process){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+module.exports = Readable;
+
+/*<replacement>*/
+var isArray = require('isarray');
+/*</replacement>*/
+
+
+/*<replacement>*/
+var Buffer = require('buffer').Buffer;
+/*</replacement>*/
+
+Readable.ReadableState = ReadableState;
+
+var EE = require('events').EventEmitter;
+
+/*<replacement>*/
+if (!EE.listenerCount) EE.listenerCount = function(emitter, type) {
+  return emitter.listeners(type).length;
+};
+/*</replacement>*/
+
+var Stream = require('stream');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+var StringDecoder;
+
+
+/*<replacement>*/
+var debug = require('util');
+if (debug && debug.debuglog) {
+  debug = debug.debuglog('stream');
+} else {
+  debug = function () {};
+}
+/*</replacement>*/
+
+
+util.inherits(Readable, Stream);
+
+function ReadableState(options, stream) {
+  var Duplex = require('./_stream_duplex');
+
+  options = options || {};
+
+  // the point at which it stops calling _read() to fill the buffer
+  // Note: 0 is a valid value, means "don't call _read preemptively ever"
+  var hwm = options.highWaterMark;
+  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
+
+  // cast to ints.
+  this.highWaterMark = ~~this.highWaterMark;
+
+  this.buffer = [];
+  this.length = 0;
+  this.pipes = null;
+  this.pipesCount = 0;
+  this.flowing = null;
+  this.ended = false;
+  this.endEmitted = false;
+  this.reading = false;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // whenever we return null, then we set a flag to say
+  // that we're awaiting a 'readable' event emission.
+  this.needReadable = false;
+  this.emittedReadable = false;
+  this.readableListening = false;
+
+
+  // object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away
+  this.objectMode = !!options.objectMode;
+
+  if (stream instanceof Duplex)
+    this.objectMode = this.objectMode || !!options.readableObjectMode;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // when piping, we only care about 'readable' events that happen
+  // after read()ing all the bytes and not getting any pushback.
+  this.ranOut = false;
+
+  // the number of writers that are awaiting a drain event in .pipe()s
+  this.awaitDrain = 0;
+
+  // if true, a maybeReadMore has been scheduled
+  this.readingMore = false;
+
+  this.decoder = null;
+  this.encoding = null;
+  if (options.encoding) {
+    if (!StringDecoder)
+      StringDecoder = require('string_decoder/').StringDecoder;
+    this.decoder = new StringDecoder(options.encoding);
+    this.encoding = options.encoding;
+  }
+}
+
+function Readable(options) {
+  var Duplex = require('./_stream_duplex');
+
+  if (!(this instanceof Readable))
+    return new Readable(options);
+
+  this._readableState = new ReadableState(options, this);
+
+  // legacy
+  this.readable = true;
+
+  Stream.call(this);
+}
+
+// Manually shove something into the read() buffer.
+// This returns true if the highWaterMark has not been hit yet,
+// similar to how Writable.write() returns true if you should
+// write() some more.
+Readable.prototype.push = function(chunk, encoding) {
+  var state = this._readableState;
+
+  if (util.isString(chunk) && !state.objectMode) {
+    encoding = encoding || state.defaultEncoding;
+    if (encoding !== state.encoding) {
+      chunk = new Buffer(chunk, encoding);
+      encoding = '';
+    }
+  }
+
+  return readableAddChunk(this, state, chunk, encoding, false);
+};
+
+// Unshift should *always* be something directly out of read()
+Readable.prototype.unshift = function(chunk) {
+  var state = this._readableState;
+  return readableAddChunk(this, state, chunk, '', true);
+};
+
+function readableAddChunk(stream, state, chunk, encoding, addToFront) {
+  var er = chunkInvalid(state, chunk);
+  if (er) {
+    stream.emit('error', er);
+  } else if (util.isNullOrUndefined(chunk)) {
+    state.reading = false;
+    if (!state.ended)
+      onEofChunk(stream, state);
+  } else if (state.objectMode || chunk && chunk.length > 0) {
+    if (state.ended && !addToFront) {
+      var e = new Error('stream.push() after EOF');
+      stream.emit('error', e);
+    } else if (state.endEmitted && addToFront) {
+      var e = new Error('stream.unshift() after end event');
+      stream.emit('error', e);
+    } else {
+      if (state.decoder && !addToFront && !encoding)
+        chunk = state.decoder.write(chunk);
+
+      if (!addToFront)
+        state.reading = false;
+
+      // if we want the data now, just emit it.
+      if (state.flowing && state.length === 0 && !state.sync) {
+        stream.emit('data', chunk);
+        stream.read(0);
+      } else {
+        // update the buffer info.
+        state.length += state.objectMode ? 1 : chunk.length;
+        if (addToFront)
+          state.buffer.unshift(chunk);
+        else
+          state.buffer.push(chunk);
+
+        if (state.needReadable)
+          emitReadable(stream);
+      }
+
+      maybeReadMore(stream, state);
+    }
+  } else if (!addToFront) {
+    state.reading = false;
+  }
+
+  return needMoreData(state);
+}
+
+
+
+// if it's past the high water mark, we can push in some more.
+// Also, if we have no data yet, we can stand some
+// more bytes.  This is to work around cases where hwm=0,
+// such as the repl.  Also, if the push() triggered a
+// readable event, and the user called read(largeNumber) such that
+// needReadable was set, then we ought to push more, so that another
+// 'readable' event will be triggered.
+function needMoreData(state) {
+  return !state.ended &&
+         (state.needReadable ||
+          state.length < state.highWaterMark ||
+          state.length === 0);
+}
+
+// backwards compatibility.
+Readable.prototype.setEncoding = function(enc) {
+  if (!StringDecoder)
+    StringDecoder = require('string_decoder/').StringDecoder;
+  this._readableState.decoder = new StringDecoder(enc);
+  this._readableState.encoding = enc;
+  return this;
+};
+
+// Don't raise the hwm > 128MB
+var MAX_HWM = 0x800000;
+function roundUpToNextPowerOf2(n) {
+  if (n >= MAX_HWM) {
+    n = MAX_HWM;
+  } else {
+    // Get the next highest power of 2
+    n--;
+    for (var p = 1; p < 32; p <<= 1) n |= n >> p;
+    n++;
+  }
+  return n;
+}
+
+function howMuchToRead(n, state) {
+  if (state.length === 0 && state.ended)
+    return 0;
+
+  if (state.objectMode)
+    return n === 0 ? 0 : 1;
+
+  if (isNaN(n) || util.isNull(n)) {
+    // only flow one buffer at a time
+    if (state.flowing && state.buffer.length)
+      return state.buffer[0].length;
+    else
+      return state.length;
+  }
+
+  if (n <= 0)
+    return 0;
+
+  // If we're asking for more than the target buffer level,
+  // then raise the water mark.  Bump up to the next highest
+  // power of 2, to prevent increasing it excessively in tiny
+  // amounts.
+  if (n > state.highWaterMark)
+    state.highWaterMark = roundUpToNextPowerOf2(n);
+
+  // don't have that much.  return null, unless we've ended.
+  if (n > state.length) {
+    if (!state.ended) {
+      state.needReadable = true;
+      return 0;
+    } else
+      return state.length;
+  }
+
+  return n;
+}
+
+// you can override either this method, or the async _read(n) below.
+Readable.prototype.read = function(n) {
+  debug('read', n);
+  var state = this._readableState;
+  var nOrig = n;
+
+  if (!util.isNumber(n) || n > 0)
+    state.emittedReadable = false;
+
+  // if we're doing read(0) to trigger a readable event, but we
+  // already have a bunch of data in the buffer, then just trigger
+  // the 'readable' event and move on.
+  if (n === 0 &&
+      state.needReadable &&
+      (state.length >= state.highWaterMark || state.ended)) {
+    debug('read: emitReadable', state.length, state.ended);
+    if (state.length === 0 && state.ended)
+      endReadable(this);
+    else
+      emitReadable(this);
+    return null;
+  }
+
+  n = howMuchToRead(n, state);
+
+  // if we've ended, and we're now clear, then finish it up.
+  if (n === 0 && state.ended) {
+    if (state.length === 0)
+      endReadable(this);
+    return null;
+  }
+
+  // All the actual chunk generation logic needs to be
+  // *below* the call to _read.  The reason is that in certain
+  // synthetic stream cases, such as passthrough streams, _read
+  // may be a completely synchronous operation which may change
+  // the state of the read buffer, providing enough data when
+  // before there was *not* enough.
+  //
+  // So, the steps are:
+  // 1. Figure out what the state of things will be after we do
+  // a read from the buffer.
+  //
+  // 2. If that resulting state will trigger a _read, then call _read.
+  // Note that this may be asynchronous, or synchronous.  Yes, it is
+  // deeply ugly to write APIs this way, but that still doesn't mean
+  // that the Readable class should behave improperly, as streams are
+  // designed to be sync/async agnostic.
+  // Take note if the _read call is sync or async (ie, if the read call
+  // has returned yet), so that we know whether or not it's safe to emit
+  // 'readable' etc.
+  //
+  // 3. Actually pull the requested chunks out of the buffer and return.
+
+  // if we need a readable event, then we need to do some reading.
+  var doRead = state.needReadable;
+  debug('need readable', doRead);
+
+  // if we currently have less than the highWaterMark, then also read some
+  if (state.length === 0 || state.length - n < state.highWaterMark) {
+    doRead = true;
+    debug('length less than watermark', doRead);
+  }
+
+  // however, if we've ended, then there's no point, and if we're already
+  // reading, then it's unnecessary.
+  if (state.ended || state.reading) {
+    doRead = false;
+    debug('reading or ended', doRead);
+  }
+
+  if (doRead) {
+    debug('do read');
+    state.reading = true;
+    state.sync = true;
+    // if the length is currently zero, then we *need* a readable event.
+    if (state.length === 0)
+      state.needReadable = true;
+    // call internal read method
+    this._read(state.highWaterMark);
+    state.sync = false;
+  }
+
+  // If _read pushed data synchronously, then `reading` will be false,
+  // and we need to re-evaluate how much data we can return to the user.
+  if (doRead && !state.reading)
+    n = howMuchToRead(nOrig, state);
+
+  var ret;
+  if (n > 0)
+    ret = fromList(n, state);
+  else
+    ret = null;
+
+  if (util.isNull(ret)) {
+    state.needReadable = true;
+    n = 0;
+  }
+
+  state.length -= n;
+
+  // If we have nothing in the buffer, then we want to know
+  // as soon as we *do* get something into the buffer.
+  if (state.length === 0 && !state.ended)
+    state.needReadable = true;
+
+  // If we tried to read() past the EOF, then emit end on the next tick.
+  if (nOrig !== n && state.ended && state.length === 0)
+    endReadable(this);
+
+  if (!util.isNull(ret))
+    this.emit('data', ret);
+
+  return ret;
+};
+
+function chunkInvalid(state, chunk) {
+  var er = null;
+  if (!util.isBuffer(chunk) &&
+      !util.isString(chunk) &&
+      !util.isNullOrUndefined(chunk) &&
+      !state.objectMode) {
+    er = new TypeError('Invalid non-string/buffer chunk');
+  }
+  return er;
+}
+
+
+function onEofChunk(stream, state) {
+  if (state.decoder && !state.ended) {
+    var chunk = state.decoder.end();
+    if (chunk && chunk.length) {
+      state.buffer.push(chunk);
+      state.length += state.objectMode ? 1 : chunk.length;
+    }
+  }
+  state.ended = true;
+
+  // emit 'readable' now to make sure it gets picked up.
+  emitReadable(stream);
+}
+
+// Don't emit readable right away in sync mode, because this can trigger
+// another read() call => stack overflow.  This way, it might trigger
+// a nextTick recursion warning, but that's not so bad.
+function emitReadable(stream) {
+  var state = stream._readableState;
+  state.needReadable = false;
+  if (!state.emittedReadable) {
+    debug('emitReadable', state.flowing);
+    state.emittedReadable = true;
+    if (state.sync)
+      process.nextTick(function() {
+        emitReadable_(stream);
+      });
+    else
+      emitReadable_(stream);
+  }
+}
+
+function emitReadable_(stream) {
+  debug('emit readable');
+  stream.emit('readable');
+  flow(stream);
+}
+
+
+// at this point, the user has presumably seen the 'readable' event,
+// and called read() to consume some data.  that may have triggered
+// in turn another _read(n) call, in which case reading = true if
+// it's in progress.
+// However, if we're not ended, or reading, and the length < hwm,
+// then go ahead and try to read some more preemptively.
+function maybeReadMore(stream, state) {
+  if (!state.readingMore) {
+    state.readingMore = true;
+    process.nextTick(function() {
+      maybeReadMore_(stream, state);
+    });
+  }
+}
+
+function maybeReadMore_(stream, state) {
+  var len = state.length;
+  while (!state.reading && !state.flowing && !state.ended &&
+         state.length < state.highWaterMark) {
+    debug('maybeReadMore read 0');
+    stream.read(0);
+    if (len === state.length)
+      // didn't get any data, stop spinning.
+      break;
+    else
+      len = state.length;
+  }
+  state.readingMore = false;
+}
+
+// abstract method.  to be overridden in specific implementation classes.
+// call cb(er, data) where data is <= n in length.
+// for virtual (non-string, non-buffer) streams, "length" is somewhat
+// arbitrary, and perhaps not very meaningful.
+Readable.prototype._read = function(n) {
+  this.emit('error', new Error('not implemented'));
+};
+
+Readable.prototype.pipe = function(dest, pipeOpts) {
+  var src = this;
+  var state = this._readableState;
+
+  switch (state.pipesCount) {
+    case 0:
+      state.pipes = dest;
+      break;
+    case 1:
+      state.pipes = [state.pipes, dest];
+      break;
+    default:
+      state.pipes.push(dest);
+      break;
+  }
+  state.pipesCount += 1;
+  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
+
+  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&
+              dest !== process.stdout &&
+              dest !== process.stderr;
+
+  var endFn = doEnd ? onend : cleanup;
+  if (state.endEmitted)
+    process.nextTick(endFn);
+  else
+    src.once('end', endFn);
+
+  dest.on('unpipe', onunpipe);
+  function onunpipe(readable) {
+    debug('onunpipe');
+    if (readable === src) {
+      cleanup();
+    }
+  }
+
+  function onend() {
+    debug('onend');
+    dest.end();
+  }
+
+  // when the dest drains, it reduces the awaitDrain counter
+  // on the source.  This would be more elegant with a .once()
+  // handler in flow(), but adding and removing repeatedly is
+  // too slow.
+  var ondrain = pipeOnDrain(src);
+  dest.on('drain', ondrain);
+
+  function cleanup() {
+    debug('cleanup');
+    // cleanup event handlers once the pipe is broken
+    dest.removeListener('close', onclose);
+    dest.removeListener('finish', onfinish);
+    dest.removeListener('drain', ondrain);
+    dest.removeListener('error', onerror);
+    dest.removeListener('unpipe', onunpipe);
+    src.removeListener('end', onend);
+    src.removeListener('end', cleanup);
+    src.removeListener('data', ondata);
+
+    // if the reader is waiting for a drain event from this
+    // specific writer, then it would cause it to never start
+    // flowing again.
+    // So, if this is awaiting a drain, then we just call it now.
+    // If we don't know, then assume that we are waiting for one.
+    if (state.awaitDrain &&
+        (!dest._writableState || dest._writableState.needDrain))
+      ondrain();
+  }
+
+  src.on('data', ondata);
+  function ondata(chunk) {
+    debug('ondata');
+    var ret = dest.write(chunk);
+    if (false === ret) {
+      debug('false write response, pause',
+            src._readableState.awaitDrain);
+      src._readableState.awaitDrain++;
+      src.pause();
+    }
+  }
+
+  // if the dest has an error, then stop piping into it.
+  // however, don't suppress the throwing behavior for this.
+  function onerror(er) {
+    debug('onerror', er);
+    unpipe();
+    dest.removeListener('error', onerror);
+    if (EE.listenerCount(dest, 'error') === 0)
+      dest.emit('error', er);
+  }
+  // This is a brutally ugly hack to make sure that our error handler
+  // is attached before any userland ones.  NEVER DO THIS.
+  if (!dest._events || !dest._events.error)
+    dest.on('error', onerror);
+  else if (isArray(dest._events.error))
+    dest._events.error.unshift(onerror);
+  else
+    dest._events.error = [onerror, dest._events.error];
+
+
+
+  // Both close and finish should trigger unpipe, but only once.
+  function onclose() {
+    dest.removeListener('finish', onfinish);
+    unpipe();
+  }
+  dest.once('close', onclose);
+  function onfinish() {
+    debug('onfinish');
+    dest.removeListener('close', onclose);
+    unpipe();
+  }
+  dest.once('finish', onfinish);
+
+  function unpipe() {
+    debug('unpipe');
+    src.unpipe(dest);
+  }
+
+  // tell the dest that it's being piped to
+  dest.emit('pipe', src);
+
+  // start the flow if it hasn't been started already.
+  if (!state.flowing) {
+    debug('pipe resume');
+    src.resume();
+  }
+
+  return dest;
+};
+
+function pipeOnDrain(src) {
+  return function() {
+    var state = src._readableState;
+    debug('pipeOnDrain', state.awaitDrain);
+    if (state.awaitDrain)
+      state.awaitDrain--;
+    if (state.awaitDrain === 0 && EE.listenerCount(src, 'data')) {
+      state.flowing = true;
+      flow(src);
+    }
+  };
+}
+
+
+Readable.prototype.unpipe = function(dest) {
+  var state = this._readableState;
+
+  // if we're not piping anywhere, then do nothing.
+  if (state.pipesCount === 0)
+    return this;
+
+  // just one destination.  most common case.
+  if (state.pipesCount === 1) {
+    // passed in one, but it's not the right one.
+    if (dest && dest !== state.pipes)
+      return this;
+
+    if (!dest)
+      dest = state.pipes;
+
+    // got a match.
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    if (dest)
+      dest.emit('unpipe', this);
+    return this;
+  }
+
+  // slow case. multiple pipe destinations.
+
+  if (!dest) {
+    // remove all.
+    var dests = state.pipes;
+    var len = state.pipesCount;
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+
+    for (var i = 0; i < len; i++)
+      dests[i].emit('unpipe', this);
+    return this;
+  }
+
+  // try to find the right one.
+  var i = indexOf(state.pipes, dest);
+  if (i === -1)
+    return this;
+
+  state.pipes.splice(i, 1);
+  state.pipesCount -= 1;
+  if (state.pipesCount === 1)
+    state.pipes = state.pipes[0];
+
+  dest.emit('unpipe', this);
+
+  return this;
+};
+
+// set up data events if they are asked for
+// Ensure readable listeners eventually get something
+Readable.prototype.on = function(ev, fn) {
+  var res = Stream.prototype.on.call(this, ev, fn);
+
+  // If listening to data, and it has not explicitly been paused,
+  // then call resume to start the flow of data on the next tick.
+  if (ev === 'data' && false !== this._readableState.flowing) {
+    this.resume();
+  }
+
+  if (ev === 'readable' && this.readable) {
+    var state = this._readableState;
+    if (!state.readableListening) {
+      state.readableListening = true;
+      state.emittedReadable = false;
+      state.needReadable = true;
+      if (!state.reading) {
+        var self = this;
+        process.nextTick(function() {
+          debug('readable nexttick read 0');
+          self.read(0);
+        });
+      } else if (state.length) {
+        emitReadable(this, state);
+      }
+    }
+  }
+
+  return res;
+};
+Readable.prototype.addListener = Readable.prototype.on;
+
+// pause() and resume() are remnants of the legacy readable stream API
+// If the user uses them, then switch into old mode.
+Readable.prototype.resume = function() {
+  var state = this._readableState;
+  if (!state.flowing) {
+    debug('resume');
+    state.flowing = true;
+    if (!state.reading) {
+      debug('resume read 0');
+      this.read(0);
+    }
+    resume(this, state);
+  }
+  return this;
+};
+
+function resume(stream, state) {
+  if (!state.resumeScheduled) {
+    state.resumeScheduled = true;
+    process.nextTick(function() {
+      resume_(stream, state);
+    });
+  }
+}
+
+function resume_(stream, state) {
+  state.resumeScheduled = false;
+  stream.emit('resume');
+  flow(stream);
+  if (state.flowing && !state.reading)
+    stream.read(0);
+}
+
+Readable.prototype.pause = function() {
+  debug('call pause flowing=%j', this._readableState.flowing);
+  if (false !== this._readableState.flowing) {
+    debug('pause');
+    this._readableState.flowing = false;
+    this.emit('pause');
+  }
+  return this;
+};
+
+function flow(stream) {
+  var state = stream._readableState;
+  debug('flow', state.flowing);
+  if (state.flowing) {
+    do {
+      var chunk = stream.read();
+    } while (null !== chunk && state.flowing);
+  }
+}
+
+// wrap an old-style stream as the async data source.
+// This is *not* part of the readable stream interface.
+// It is an ugly unfortunate mess of history.
+Readable.prototype.wrap = function(stream) {
+  var state = this._readableState;
+  var paused = false;
+
+  var self = this;
+  stream.on('end', function() {
+    debug('wrapped end');
+    if (state.decoder && !state.ended) {
+      var chunk = state.decoder.end();
+      if (chunk && chunk.length)
+        self.push(chunk);
+    }
+
+    self.push(null);
+  });
+
+  stream.on('data', function(chunk) {
+    debug('wrapped data');
+    if (state.decoder)
+      chunk = state.decoder.write(chunk);
+    if (!chunk || !state.objectMode && !chunk.length)
+      return;
+
+    var ret = self.push(chunk);
+    if (!ret) {
+      paused = true;
+      stream.pause();
+    }
+  });
+
+  // proxy all the other methods.
+  // important when wrapping filters and duplexes.
+  for (var i in stream) {
+    if (util.isFunction(stream[i]) && util.isUndefined(this[i])) {
+      this[i] = function(method) { return function() {
+        return stream[method].apply(stream, arguments);
+      }}(i);
+    }
+  }
+
+  // proxy certain important events.
+  var events = ['error', 'close', 'destroy', 'pause', 'resume'];
+  forEach(events, function(ev) {
+    stream.on(ev, self.emit.bind(self, ev));
+  });
+
+  // when we try to consume some more bytes, simply unpause the
+  // underlying stream.
+  self._read = function(n) {
+    debug('wrapped _read', n);
+    if (paused) {
+      paused = false;
+      stream.resume();
+    }
+  };
+
+  return self;
+};
+
+
+
+// exposed for testing purposes only.
+Readable._fromList = fromList;
+
+// Pluck off n bytes from an array of buffers.
+// Length is the combined lengths of all the buffers in the list.
+function fromList(n, state) {
+  var list = state.buffer;
+  var length = state.length;
+  var stringMode = !!state.decoder;
+  var objectMode = !!state.objectMode;
+  var ret;
+
+  // nothing in the list, definitely empty.
+  if (list.length === 0)
+    return null;
+
+  if (length === 0)
+    ret = null;
+  else if (objectMode)
+    ret = list.shift();
+  else if (!n || n >= length) {
+    // read it all, truncate the array.
+    if (stringMode)
+      ret = list.join('');
+    else
+      ret = Buffer.concat(list, length);
+    list.length = 0;
+  } else {
+    // read just some of it.
+    if (n < list[0].length) {
+      // just take a part of the first list item.
+      // slice is the same for buffers and strings.
+      var buf = list[0];
+      ret = buf.slice(0, n);
+      list[0] = buf.slice(n);
+    } else if (n === list[0].length) {
+      // first list is a perfect match
+      ret = list.shift();
+    } else {
+      // complex case.
+      // we have enough to cover it, but it spans past the first buffer.
+      if (stringMode)
+        ret = '';
+      else
+        ret = new Buffer(n);
+
+      var c = 0;
+      for (var i = 0, l = list.length; i < l && c < n; i++) {
+        var buf = list[0];
+        var cpy = Math.min(n - c, buf.length);
+
+        if (stringMode)
+          ret += buf.slice(0, cpy);
+        else
+          buf.copy(ret, c, 0, cpy);
+
+        if (cpy < buf.length)
+          list[0] = buf.slice(cpy);
+        else
+          list.shift();
+
+        c += cpy;
+      }
+    }
+  }
+
+  return ret;
+}
+
+function endReadable(stream) {
+  var state = stream._readableState;
+
+  // If we get here before consuming all the bytes, then that is a
+  // bug in node.  Should never happen.
+  if (state.length > 0)
+    throw new Error('endReadable called on non-empty stream');
+
+  if (!state.endEmitted) {
+    state.ended = true;
+    process.nextTick(function() {
+      // Check that we didn't get one last unshift.
+      if (!state.endEmitted && state.length === 0) {
+        state.endEmitted = true;
+        stream.readable = false;
+        stream.emit('end');
+      }
+    });
+  }
+}
+
+function forEach (xs, f) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    f(xs[i], i);
+  }
+}
+
+function indexOf (xs, x) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    if (xs[i] === x) return i;
+  }
+  return -1;
+}
+
+}).call(this,require('_process'))
+},{"./_stream_duplex":16,"_process":14,"buffer":7,"core-util-is":21,"events":11,"inherits":12,"isarray":13,"stream":26,"string_decoder/":27,"util":6}],19:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
+
+module.exports = Transform;
+
+var Duplex = require('./_stream_duplex');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+util.inherits(Transform, Duplex);
+
+
+function TransformState(options, stream) {
+  this.afterTransform = function(er, data) {
+    return afterTransform(stream, er, data);
+  };
+
+  this.needTransform = false;
+  this.transforming = false;
+  this.writecb = null;
+  this.writechunk = null;
+}
+
+function afterTransform(stream, er, data) {
+  var ts = stream._transformState;
+  ts.transforming = false;
+
+  var cb = ts.writecb;
+
+  if (!cb)
+    return stream.emit('error', new Error('no writecb in Transform class'));
+
+  ts.writechunk = null;
+  ts.writecb = null;
+
+  if (!util.isNullOrUndefined(data))
+    stream.push(data);
+
+  if (cb)
+    cb(er);
+
+  var rs = stream._readableState;
+  rs.reading = false;
+  if (rs.needReadable || rs.length < rs.highWaterMark) {
+    stream._read(rs.highWaterMark);
+  }
+}
+
+
+function Transform(options) {
+  if (!(this instanceof Transform))
+    return new Transform(options);
+
+  Duplex.call(this, options);
+
+  this._transformState = new TransformState(options, this);
+
+  // when the writable side finishes, then flush out anything remaining.
+  var stream = this;
+
+  // start out asking for a readable event once data is transformed.
+  this._readableState.needReadable = true;
+
+  // we have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false;
+
+  this.once('prefinish', function() {
+    if (util.isFunction(this._flush))
+      this._flush(function(er) {
+        done(stream, er);
+      });
+    else
+      done(stream);
+  });
+}
+
+Transform.prototype.push = function(chunk, encoding) {
+  this._transformState.needTransform = false;
+  return Duplex.prototype.push.call(this, chunk, encoding);
+};
+
+// This is the part where you do stuff!
+// override this function in implementation classes.
+// 'chunk' is an input chunk.
+//
+// Call `push(newChunk)` to pass along transformed output
+// to the readable side.  You may call 'push' zero or more times.
+//
+// Call `cb(err)` when you are done with this chunk.  If you pass
+// an error, then that'll put the hurt on the whole operation.  If you
+// never call cb(), then you'll never get another chunk.
+Transform.prototype._transform = function(chunk, encoding, cb) {
+  throw new Error('not implemented');
+};
+
+Transform.prototype._write = function(chunk, encoding, cb) {
+  var ts = this._transformState;
+  ts.writecb = cb;
+  ts.writechunk = chunk;
+  ts.writeencoding = encoding;
+  if (!ts.transforming) {
+    var rs = this._readableState;
+    if (ts.needTransform ||
+        rs.needReadable ||
+        rs.length < rs.highWaterMark)
+      this._read(rs.highWaterMark);
+  }
+};
+
+// Doesn't matter what the args are here.
+// _transform does all the work.
+// That we got here means that the readable side wants more data.
+Transform.prototype._read = function(n) {
+  var ts = this._transformState;
+
+  if (!util.isNull(ts.writechunk) && ts.writecb && !ts.transforming) {
+    ts.transforming = true;
+    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
+  } else {
+    // mark that we need a transform, so that any data that comes in
+    // will get processed, now that we've asked for it.
+    ts.needTransform = true;
+  }
+};
+
+
+function done(stream, er) {
+  if (er)
+    return stream.emit('error', er);
+
+  // if there's nothing in the write buffer, then that means
+  // that nothing more will ever be provided
+  var ws = stream._writableState;
+  var ts = stream._transformState;
+
+  if (ws.length)
+    throw new Error('calling transform done when ws.length != 0');
+
+  if (ts.transforming)
+    throw new Error('calling transform done when still transforming');
+
+  return stream.push(null);
+}
+
+},{"./_stream_duplex":16,"core-util-is":21,"inherits":12}],20:[function(require,module,exports){
+(function (process){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// A bit simpler than readable streams.
+// Implement an async ._write(chunk, cb), and it'll handle all
+// the drain event emission and buffering.
+
+module.exports = Writable;
+
+/*<replacement>*/
+var Buffer = require('buffer').Buffer;
+/*</replacement>*/
+
+Writable.WritableState = WritableState;
+
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+var Stream = require('stream');
+
+util.inherits(Writable, Stream);
+
+function WriteReq(chunk, encoding, cb) {
+  this.chunk = chunk;
+  this.encoding = encoding;
+  this.callback = cb;
+}
+
+function WritableState(options, stream) {
+  var Duplex = require('./_stream_duplex');
+
+  options = options || {};
+
+  // the point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write()
+  var hwm = options.highWaterMark;
+  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
+
+  // object stream flag to indicate whether or not this stream
+  // contains buffers or objects.
+  this.objectMode = !!options.objectMode;
+
+  if (stream instanceof Duplex)
+    this.objectMode = this.objectMode || !!options.writableObjectMode;
+
+  // cast to ints.
+  this.highWaterMark = ~~this.highWaterMark;
+
+  this.needDrain = false;
+  // at the start of calling end()
+  this.ending = false;
+  // when end() has been called, and returned
+  this.ended = false;
+  // when 'finish' is emitted
+  this.finished = false;
+
+  // should we decode strings into buffers before passing to _write?
+  // this is here so that some node-core streams can optimize string
+  // handling at a lower level.
+  var noDecode = options.decodeStrings === false;
+  this.decodeStrings = !noDecode;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // not an actual buffer we keep track of, but a measurement
+  // of how much we're waiting to get pushed to some underlying
+  // socket or file.
+  this.length = 0;
+
+  // a flag to see when we're in the middle of a write.
+  this.writing = false;
+
+  // when true all writes will be buffered until .uncork() call
+  this.corked = 0;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // a flag to know if we're processing previously buffered items, which
+  // may call the _write() callback in the same tick, so that we don't
+  // end up in an overlapped onwrite situation.
+  this.bufferProcessing = false;
+
+  // the callback that's passed to _write(chunk,cb)
+  this.onwrite = function(er) {
+    onwrite(stream, er);
+  };
+
+  // the callback that the user supplies to write(chunk,encoding,cb)
+  this.writecb = null;
+
+  // the amount that is being written when _write is called.
+  this.writelen = 0;
+
+  this.buffer = [];
+
+  // number of pending user-supplied write callbacks
+  // this must be 0 before 'finish' can be emitted
+  this.pendingcb = 0;
+
+  // emit prefinish if the only thing we're waiting for is _write cbs
+  // This is relevant for synchronous Transform streams
+  this.prefinished = false;
+
+  // True if the error was already emitted and should not be thrown again
+  this.errorEmitted = false;
+}
+
+function Writable(options) {
+  var Duplex = require('./_stream_duplex');
+
+  // Writable ctor is applied to Duplexes, though they're not
+  // instanceof Writable, they're instanceof Readable.
+  if (!(this instanceof Writable) && !(this instanceof Duplex))
+    return new Writable(options);
+
+  this._writableState = new WritableState(options, this);
+
+  // legacy.
+  this.writable = true;
+
+  Stream.call(this);
+}
+
+// Otherwise people can pipe Writable streams, which is just wrong.
+Writable.prototype.pipe = function() {
+  this.emit('error', new Error('Cannot pipe. Not readable.'));
+};
+
+
+function writeAfterEnd(stream, state, cb) {
+  var er = new Error('write after end');
+  // TODO: defer error events consistently everywhere, not just the cb
+  stream.emit('error', er);
+  process.nextTick(function() {
+    cb(er);
+  });
+}
+
+// If we get something that is not a buffer, string, null, or undefined,
+// and we're not in objectMode, then that's an error.
+// Otherwise stream chunks are all considered to be of length=1, and the
+// watermarks determine how many objects to keep in the buffer, rather than
+// how many bytes or characters.
+function validChunk(stream, state, chunk, cb) {
+  var valid = true;
+  if (!util.isBuffer(chunk) &&
+      !util.isString(chunk) &&
+      !util.isNullOrUndefined(chunk) &&
+      !state.objectMode) {
+    var er = new TypeError('Invalid non-string/buffer chunk');
+    stream.emit('error', er);
+    process.nextTick(function() {
+      cb(er);
+    });
+    valid = false;
+  }
+  return valid;
+}
+
+Writable.prototype.write = function(chunk, encoding, cb) {
+  var state = this._writableState;
+  var ret = false;
+
+  if (util.isFunction(encoding)) {
+    cb = encoding;
+    encoding = null;
+  }
+
+  if (util.isBuffer(chunk))
+    encoding = 'buffer';
+  else if (!encoding)
+    encoding = state.defaultEncoding;
+
+  if (!util.isFunction(cb))
+    cb = function() {};
+
+  if (state.ended)
+    writeAfterEnd(this, state, cb);
+  else if (validChunk(this, state, chunk, cb)) {
+    state.pendingcb++;
+    ret = writeOrBuffer(this, state, chunk, encoding, cb);
+  }
+
+  return ret;
+};
+
+Writable.prototype.cork = function() {
+  var state = this._writableState;
+
+  state.corked++;
+};
+
+Writable.prototype.uncork = function() {
+  var state = this._writableState;
+
+  if (state.corked) {
+    state.corked--;
+
+    if (!state.writing &&
+        !state.corked &&
+        !state.finished &&
+        !state.bufferProcessing &&
+        state.buffer.length)
+      clearBuffer(this, state);
+  }
+};
+
+function decodeChunk(state, chunk, encoding) {
+  if (!state.objectMode &&
+      state.decodeStrings !== false &&
+      util.isString(chunk)) {
+    chunk = new Buffer(chunk, encoding);
+  }
+  return chunk;
+}
+
+// if we're already writing something, then just put this
+// in the queue, and wait our turn.  Otherwise, call _write
+// If we return false, then we need a drain event, so set that flag.
+function writeOrBuffer(stream, state, chunk, encoding, cb) {
+  chunk = decodeChunk(state, chunk, encoding);
+  if (util.isBuffer(chunk))
+    encoding = 'buffer';
+  var len = state.objectMode ? 1 : chunk.length;
+
+  state.length += len;
+
+  var ret = state.length < state.highWaterMark;
+  // we must ensure that previous needDrain will not be reset to false.
+  if (!ret)
+    state.needDrain = true;
+
+  if (state.writing || state.corked)
+    state.buffer.push(new WriteReq(chunk, encoding, cb));
+  else
+    doWrite(stream, state, false, len, chunk, encoding, cb);
+
+  return ret;
+}
+
+function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+  state.writelen = len;
+  state.writecb = cb;
+  state.writing = true;
+  state.sync = true;
+  if (writev)
+    stream._writev(chunk, state.onwrite);
+  else
+    stream._write(chunk, encoding, state.onwrite);
+  state.sync = false;
+}
+
+function onwriteError(stream, state, sync, er, cb) {
+  if (sync)
+    process.nextTick(function() {
+      state.pendingcb--;
+      cb(er);
+    });
+  else {
+    state.pendingcb--;
+    cb(er);
+  }
+
+  stream._writableState.errorEmitted = true;
+  stream.emit('error', er);
+}
+
+function onwriteStateUpdate(state) {
+  state.writing = false;
+  state.writecb = null;
+  state.length -= state.writelen;
+  state.writelen = 0;
+}
+
+function onwrite(stream, er) {
+  var state = stream._writableState;
+  var sync = state.sync;
+  var cb = state.writecb;
+
+  onwriteStateUpdate(state);
+
+  if (er)
+    onwriteError(stream, state, sync, er, cb);
+  else {
+    // Check if we're actually ready to finish, but don't emit yet
+    var finished = needFinish(stream, state);
+
+    if (!finished &&
+        !state.corked &&
+        !state.bufferProcessing &&
+        state.buffer.length) {
+      clearBuffer(stream, state);
+    }
+
+    if (sync) {
+      process.nextTick(function() {
+        afterWrite(stream, state, finished, cb);
+      });
+    } else {
+      afterWrite(stream, state, finished, cb);
+    }
+  }
+}
+
+function afterWrite(stream, state, finished, cb) {
+  if (!finished)
+    onwriteDrain(stream, state);
+  state.pendingcb--;
+  cb();
+  finishMaybe(stream, state);
+}
+
+// Must force callback to be called on nextTick, so that we don't
+// emit 'drain' before the write() consumer gets the 'false' return
+// value, and has a chance to attach a 'drain' listener.
+function onwriteDrain(stream, state) {
+  if (state.length === 0 && state.needDrain) {
+    state.needDrain = false;
+    stream.emit('drain');
+  }
+}
+
+
+// if there's something in the buffer waiting, then process it
+function clearBuffer(stream, state) {
+  state.bufferProcessing = true;
+
+  if (stream._writev && state.buffer.length > 1) {
+    // Fast case, write everything using _writev()
+    var cbs = [];
+    for (var c = 0; c < state.buffer.length; c++)
+      cbs.push(state.buffer[c].callback);
+
+    // count the one we are adding, as well.
+    // TODO(isaacs) clean this up
+    state.pendingcb++;
+    doWrite(stream, state, true, state.length, state.buffer, '', function(err) {
+      for (var i = 0; i < cbs.length; i++) {
+        state.pendingcb--;
+        cbs[i](err);
+      }
+    });
+
+    // Clear buffer
+    state.buffer = [];
+  } else {
+    // Slow case, write chunks one-by-one
+    for (var c = 0; c < state.buffer.length; c++) {
+      var entry = state.buffer[c];
+      var chunk = entry.chunk;
+      var encoding = entry.encoding;
+      var cb = entry.callback;
+      var len = state.objectMode ? 1 : chunk.length;
+
+      doWrite(stream, state, false, len, chunk, encoding, cb);
+
+      // if we didn't call the onwrite immediately, then
+      // it means that we need to wait until it does.
+      // also, that means that the chunk and cb are currently
+      // being processed, so move the buffer counter past them.
+      if (state.writing) {
+        c++;
+        break;
+      }
+    }
+
+    if (c < state.buffer.length)
+      state.buffer = state.buffer.slice(c);
+    else
+      state.buffer.length = 0;
+  }
+
+  state.bufferProcessing = false;
+}
+
+Writable.prototype._write = function(chunk, encoding, cb) {
+  cb(new Error('not implemented'));
+
+};
+
+Writable.prototype._writev = null;
+
+Writable.prototype.end = function(chunk, encoding, cb) {
+  var state = this._writableState;
+
+  if (util.isFunction(chunk)) {
+    cb = chunk;
+    chunk = null;
+    encoding = null;
+  } else if (util.isFunction(encoding)) {
+    cb = encoding;
+    encoding = null;
+  }
+
+  if (!util.isNullOrUndefined(chunk))
+    this.write(chunk, encoding);
+
+  // .end() fully uncorks
+  if (state.corked) {
+    state.corked = 1;
+    this.uncork();
+  }
+
+  // ignore unnecessary end() calls.
+  if (!state.ending && !state.finished)
+    endWritable(this, state, cb);
+};
+
+
+function needFinish(stream, state) {
+  return (state.ending &&
+          state.length === 0 &&
+          !state.finished &&
+          !state.writing);
+}
+
+function prefinish(stream, state) {
+  if (!state.prefinished) {
+    state.prefinished = true;
+    stream.emit('prefinish');
+  }
+}
+
+function finishMaybe(stream, state) {
+  var need = needFinish(stream, state);
+  if (need) {
+    if (state.pendingcb === 0) {
+      prefinish(stream, state);
+      state.finished = true;
+      stream.emit('finish');
+    } else
+      prefinish(stream, state);
+  }
+  return need;
+}
+
+function endWritable(stream, state, cb) {
+  state.ending = true;
+  finishMaybe(stream, state);
+  if (cb) {
+    if (state.finished)
+      process.nextTick(cb);
+    else
+      stream.once('finish', cb);
+  }
+  state.ended = true;
+}
+
+}).call(this,require('_process'))
+},{"./_stream_duplex":16,"_process":14,"buffer":7,"core-util-is":21,"inherits":12,"stream":26}],21:[function(require,module,exports){
+(function (Buffer){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+function isArray(ar) {
+  return Array.isArray(ar);
+}
+exports.isArray = isArray;
+
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+exports.isBoolean = isBoolean;
+
+function isNull(arg) {
+  return arg === null;
+}
+exports.isNull = isNull;
+
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+exports.isNullOrUndefined = isNullOrUndefined;
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+exports.isNumber = isNumber;
+
+function isString(arg) {
+  return typeof arg === 'string';
+}
+exports.isString = isString;
+
+function isSymbol(arg) {
+  return typeof arg === 'symbol';
+}
+exports.isSymbol = isSymbol;
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+exports.isUndefined = isUndefined;
+
+function isRegExp(re) {
+  return isObject(re) && objectToString(re) === '[object RegExp]';
+}
+exports.isRegExp = isRegExp;
+
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+exports.isObject = isObject;
+
+function isDate(d) {
+  return isObject(d) && objectToString(d) === '[object Date]';
+}
+exports.isDate = isDate;
+
+function isError(e) {
+  return isObject(e) &&
+      (objectToString(e) === '[object Error]' || e instanceof Error);
+}
+exports.isError = isError;
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+exports.isFunction = isFunction;
+
+function isPrimitive(arg) {
+  return arg === null ||
+         typeof arg === 'boolean' ||
+         typeof arg === 'number' ||
+         typeof arg === 'string' ||
+         typeof arg === 'symbol' ||  // ES6 symbol
+         typeof arg === 'undefined';
+}
+exports.isPrimitive = isPrimitive;
+
+function isBuffer(arg) {
+  return Buffer.isBuffer(arg);
+}
+exports.isBuffer = isBuffer;
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
+}).call(this,require("buffer").Buffer)
+},{"buffer":7}],22:[function(require,module,exports){
+module.exports = require("./lib/_stream_passthrough.js")
+
+},{"./lib/_stream_passthrough.js":17}],23:[function(require,module,exports){
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Stream = require('stream');
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
+
+},{"./lib/_stream_duplex.js":16,"./lib/_stream_passthrough.js":17,"./lib/_stream_readable.js":18,"./lib/_stream_transform.js":19,"./lib/_stream_writable.js":20,"stream":26}],24:[function(require,module,exports){
+module.exports = require("./lib/_stream_transform.js")
+
+},{"./lib/_stream_transform.js":19}],25:[function(require,module,exports){
+module.exports = require("./lib/_stream_writable.js")
+
+},{"./lib/_stream_writable.js":20}],26:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+module.exports = Stream;
+
+var EE = require('events').EventEmitter;
+var inherits = require('inherits');
+
+inherits(Stream, EE);
+Stream.Readable = require('readable-stream/readable.js');
+Stream.Writable = require('readable-stream/writable.js');
+Stream.Duplex = require('readable-stream/duplex.js');
+Stream.Transform = require('readable-stream/transform.js');
+Stream.PassThrough = require('readable-stream/passthrough.js');
+
+// Backwards-compat with node 0.4.x
+Stream.Stream = Stream;
+
+
+
+// old-style streams.  Note that the pipe method (the only relevant
+// part of this class) is overridden in the Readable class.
+
+function Stream() {
+  EE.call(this);
+}
+
+Stream.prototype.pipe = function(dest, options) {
+  var source = this;
+
+  function ondata(chunk) {
+    if (dest.writable) {
+      if (false === dest.write(chunk) && source.pause) {
+        source.pause();
+      }
+    }
+  }
+
+  source.on('data', ondata);
+
+  function ondrain() {
+    if (source.readable && source.resume) {
+      source.resume();
+    }
+  }
+
+  dest.on('drain', ondrain);
+
+  // If the 'end' option is not supplied, dest.end() will be called when
+  // source gets the 'end' or 'close' events.  Only dest.end() once.
+  if (!dest._isStdio && (!options || options.end !== false)) {
+    source.on('end', onend);
+    source.on('close', onclose);
+  }
+
+  var didOnEnd = false;
+  function onend() {
+    if (didOnEnd) return;
+    didOnEnd = true;
+
+    dest.end();
+  }
+
+
+  function onclose() {
+    if (didOnEnd) return;
+    didOnEnd = true;
+
+    if (typeof dest.destroy === 'function') dest.destroy();
+  }
+
+  // don't leave dangling pipes when there are errors.
+  function onerror(er) {
+    cleanup();
+    if (EE.listenerCount(this, 'error') === 0) {
+      throw er; // Unhandled stream error in pipe.
+    }
+  }
+
+  source.on('error', onerror);
+  dest.on('error', onerror);
+
+  // remove all the event listeners that were added.
+  function cleanup() {
+    source.removeListener('data', ondata);
+    dest.removeListener('drain', ondrain);
+
+    source.removeListener('end', onend);
+    source.removeListener('close', onclose);
+
+    source.removeListener('error', onerror);
+    dest.removeListener('error', onerror);
+
+    source.removeListener('end', cleanup);
+    source.removeListener('close', cleanup);
+
+    dest.removeListener('close', cleanup);
+  }
+
+  source.on('end', cleanup);
+  source.on('close', cleanup);
+
+  dest.on('close', cleanup);
+
+  dest.emit('pipe', source);
+
+  // Allow for unix-like usage: A.pipe(B).pipe(C)
+  return dest;
+};
+
+},{"events":11,"inherits":12,"readable-stream/duplex.js":15,"readable-stream/passthrough.js":22,"readable-stream/readable.js":23,"readable-stream/transform.js":24,"readable-stream/writable.js":25}],27:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var Buffer = require('buffer').Buffer;
+
+var isBufferEncoding = Buffer.isEncoding
+  || function(encoding) {
+       switch (encoding && encoding.toLowerCase()) {
+         case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true;
+         default: return false;
+       }
+     }
+
+
+function assertEncoding(encoding) {
+  if (encoding && !isBufferEncoding(encoding)) {
+    throw new Error('Unknown encoding: ' + encoding);
+  }
+}
+
+// StringDecoder provides an interface for efficiently splitting a series of
+// buffers into a series of JS strings without breaking apart multi-byte
+// characters. CESU-8 is handled as part of the UTF-8 encoding.
+//
+// @TODO Handling all encodings inside a single object makes it very difficult
+// to reason about this code, so it should be split up in the future.
+// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code
+// points as used by CESU-8.
+var StringDecoder = exports.StringDecoder = function(encoding) {
+  this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');
+  assertEncoding(encoding);
+  switch (this.encoding) {
+    case 'utf8':
+      // CESU-8 represents each of Surrogate Pair by 3-bytes
+      this.surrogateSize = 3;
+      break;
+    case 'ucs2':
+    case 'utf16le':
+      // UTF-16 represents each of Surrogate Pair by 2-bytes
+      this.surrogateSize = 2;
+      this.detectIncompleteChar = utf16DetectIncompleteChar;
+      break;
+    case 'base64':
+      // Base-64 stores 3 bytes in 4 chars, and pads the remainder.
+      this.surrogateSize = 3;
+      this.detectIncompleteChar = base64DetectIncompleteChar;
+      break;
+    default:
+      this.write = passThroughWrite;
+      return;
+  }
+
+  // Enough space to store all bytes of a single character. UTF-8 needs 4
+  // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate).
+  this.charBuffer = new Buffer(6);
+  // Number of bytes received for the current incomplete multi-byte character.
+  this.charReceived = 0;
+  // Number of bytes expected for the current incomplete multi-byte character.
+  this.charLength = 0;
+};
+
+
+// write decodes the given buffer and returns it as JS string that is
+// guaranteed to not contain any partial multi-byte characters. Any partial
+// character found at the end of the buffer is buffered up, and will be
+// returned when calling write again with the remaining bytes.
+//
+// Note: Converting a Buffer containing an orphan surrogate to a String
+// currently works, but converting a String to a Buffer (via `new Buffer`, or
+// Buffer#write) will replace incomplete surrogates with the unicode
+// replacement character. See https://codereview.chromium.org/121173009/ .
+StringDecoder.prototype.write = function(buffer) {
+  var charStr = '';
+  // if our last write ended with an incomplete multibyte character
+  while (this.charLength) {
+    // determine how many remaining bytes this buffer has to offer for this char
+    var available = (buffer.length >= this.charLength - this.charReceived) ?
+        this.charLength - this.charReceived :
+        buffer.length;
+
+    // add the new bytes to the char buffer
+    buffer.copy(this.charBuffer, this.charReceived, 0, available);
+    this.charReceived += available;
+
+    if (this.charReceived < this.charLength) {
+      // still not enough chars in this buffer? wait for more ...
+      return '';
+    }
+
+    // remove bytes belonging to the current character from the buffer
+    buffer = buffer.slice(available, buffer.length);
+
+    // get the character that was split
+    charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);
+
+    // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
+    var charCode = charStr.charCodeAt(charStr.length - 1);
+    if (charCode >= 0xD800 && charCode <= 0xDBFF) {
+      this.charLength += this.surrogateSize;
+      charStr = '';
+      continue;
+    }
+    this.charReceived = this.charLength = 0;
+
+    // if there are no more bytes in this buffer, just emit our char
+    if (buffer.length === 0) {
+      return charStr;
+    }
+    break;
+  }
+
+  // determine and set charLength / charReceived
+  this.detectIncompleteChar(buffer);
+
+  var end = buffer.length;
+  if (this.charLength) {
+    // buffer the incomplete character bytes we got
+    buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end);
+    end -= this.charReceived;
+  }
+
+  charStr += buffer.toString(this.encoding, 0, end);
+
+  var end = charStr.length - 1;
+  var charCode = charStr.charCodeAt(end);
+  // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
+  if (charCode >= 0xD800 && charCode <= 0xDBFF) {
+    var size = this.surrogateSize;
+    this.charLength += size;
+    this.charReceived += size;
+    this.charBuffer.copy(this.charBuffer, size, 0, size);
+    buffer.copy(this.charBuffer, 0, 0, size);
+    return charStr.substring(0, end);
+  }
+
+  // or just emit the charStr
+  return charStr;
+};
+
+// detectIncompleteChar determines if there is an incomplete UTF-8 character at
+// the end of the given buffer. If so, it sets this.charLength to the byte
+// length that character, and sets this.charReceived to the number of bytes
+// that are available for this character.
+StringDecoder.prototype.detectIncompleteChar = function(buffer) {
+  // determine how many bytes we have to check at the end of this buffer
+  var i = (buffer.length >= 3) ? 3 : buffer.length;
+
+  // Figure out if one of the last i bytes of our buffer announces an
+  // incomplete char.
+  for (; i > 0; i--) {
+    var c = buffer[buffer.length - i];
+
+    // See http://en.wikipedia.org/wiki/UTF-8#Description
+
+    // 110XXXXX
+    if (i == 1 && c >> 5 == 0x06) {
+      this.charLength = 2;
+      break;
+    }
+
+    // 1110XXXX
+    if (i <= 2 && c >> 4 == 0x0E) {
+      this.charLength = 3;
+      break;
+    }
+
+    // 11110XXX
+    if (i <= 3 && c >> 3 == 0x1E) {
+      this.charLength = 4;
+      break;
+    }
+  }
+  this.charReceived = i;
+};
+
+StringDecoder.prototype.end = function(buffer) {
+  var res = '';
+  if (buffer && buffer.length)
+    res = this.write(buffer);
+
+  if (this.charReceived) {
+    var cr = this.charReceived;
+    var buf = this.charBuffer;
+    var enc = this.encoding;
+    res += buf.slice(0, cr).toString(enc);
+  }
+
+  return res;
+};
+
+function passThroughWrite(buffer) {
+  return buffer.toString(this.encoding);
+}
+
+function utf16DetectIncompleteChar(buffer) {
+  this.charReceived = buffer.length % 2;
+  this.charLength = this.charReceived ? 2 : 0;
+}
+
+function base64DetectIncompleteChar(buffer) {
+  this.charReceived = buffer.length % 3;
+  this.charLength = this.charReceived ? 3 : 0;
+}
+
+},{"buffer":7}],28:[function(require,module,exports){
+module.exports = function isBuffer(arg) {
+  return arg && typeof arg === 'object'
+    && typeof arg.copy === 'function'
+    && typeof arg.fill === 'function'
+    && typeof arg.readUInt8 === 'function';
+}
+},{}],29:[function(require,module,exports){
+(function (process,global){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var formatRegExp = /%[sdj%]/g;
+exports.format = function(f) {
+  if (!isString(f)) {
+    var objects = [];
+    for (var i = 0; i < arguments.length; i++) {
+      objects.push(inspect(arguments[i]));
+    }
+    return objects.join(' ');
+  }
+
+  var i = 1;
+  var args = arguments;
+  var len = args.length;
+  var str = String(f).replace(formatRegExp, function(x) {
+    if (x === '%%') return '%';
+    if (i >= len) return x;
+    switch (x) {
+      case '%s': return String(args[i++]);
+      case '%d': return Number(args[i++]);
+      case '%j':
+        try {
+          return JSON.stringify(args[i++]);
+        } catch (_) {
+          return '[Circular]';
+        }
+      default:
+        return x;
+    }
+  });
+  for (var x = args[i]; i < len; x = args[++i]) {
+    if (isNull(x) || !isObject(x)) {
+      str += ' ' + x;
+    } else {
+      str += ' ' + inspect(x);
+    }
+  }
+  return str;
+};
+
+
+// Mark that a method should not be used.
+// Returns a modified function which warns once by default.
+// If --no-deprecation is set, then it is a no-op.
+exports.deprecate = function(fn, msg) {
+  // Allow for deprecating things in the process of starting up.
+  if (isUndefined(global.process)) {
+    return function() {
+      return exports.deprecate(fn, msg).apply(this, arguments);
+    };
+  }
+
+  if (process.noDeprecation === true) {
+    return fn;
+  }
+
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (process.throwDeprecation) {
+        throw new Error(msg);
+      } else if (process.traceDeprecation) {
+        console.trace(msg);
+      } else {
+        console.error(msg);
+      }
+      warned = true;
+    }
+    return fn.apply(this, arguments);
+  }
+
+  return deprecated;
+};
+
+
+var debugs = {};
+var debugEnviron;
+exports.debuglog = function(set) {
+  if (isUndefined(debugEnviron))
+    debugEnviron = process.env.NODE_DEBUG || '';
+  set = set.toUpperCase();
+  if (!debugs[set]) {
+    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
+      var pid = process.pid;
+      debugs[set] = function() {
+        var msg = exports.format.apply(exports, arguments);
+        console.error('%s %d: %s', set, pid, msg);
+      };
+    } else {
+      debugs[set] = function() {};
+    }
+  }
+  return debugs[set];
+};
+
+
+/**
+ * Echos the value of a value. Trys to print the value out
+ * in the best way possible given the different types.
+ *
+ * @param {Object} obj The object to print out.
+ * @param {Object} opts Optional options object that alters the output.
+ */
+/* legacy: obj, showHidden, depth, colors*/
+function inspect(obj, opts) {
+  // default options
+  var ctx = {
+    seen: [],
+    stylize: stylizeNoColor
+  };
+  // legacy...
+  if (arguments.length >= 3) ctx.depth = arguments[2];
+  if (arguments.length >= 4) ctx.colors = arguments[3];
+  if (isBoolean(opts)) {
+    // legacy...
+    ctx.showHidden = opts;
+  } else if (opts) {
+    // got an "options" object
+    exports._extend(ctx, opts);
+  }
+  // set default options
+  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
+  if (isUndefined(ctx.depth)) ctx.depth = 2;
+  if (isUndefined(ctx.colors)) ctx.colors = false;
+  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
+  if (ctx.colors) ctx.stylize = stylizeWithColor;
+  return formatValue(ctx, obj, ctx.depth);
+}
+exports.inspect = inspect;
+
+
+// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
+inspect.colors = {
+  'bold' : [1, 22],
+  'italic' : [3, 23],
+  'underline' : [4, 24],
+  'inverse' : [7, 27],
+  'white' : [37, 39],
+  'grey' : [90, 39],
+  'black' : [30, 39],
+  'blue' : [34, 39],
+  'cyan' : [36, 39],
+  'green' : [32, 39],
+  'magenta' : [35, 39],
+  'red' : [31, 39],
+  'yellow' : [33, 39]
+};
+
+// Don't use 'blue' not visible on cmd.exe
+inspect.styles = {
+  'special': 'cyan',
+  'number': 'yellow',
+  'boolean': 'yellow',
+  'undefined': 'grey',
+  'null': 'bold',
+  'string': 'green',
+  'date': 'magenta',
+  // "name": intentionally not styling
+  'regexp': 'red'
+};
+
+
+function stylizeWithColor(str, styleType) {
+  var style = inspect.styles[styleType];
+
+  if (style) {
+    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
+           '\u001b[' + inspect.colors[style][1] + 'm';
+  } else {
+    return str;
+  }
+}
+
+
+function stylizeNoColor(str, styleType) {
+  return str;
+}
+
+
+function arrayToHash(array) {
+  var hash = {};
+
+  array.forEach(function(val, idx) {
+    hash[val] = true;
+  });
+
+  return hash;
+}
+
+
+function formatValue(ctx, value, recurseTimes) {
+  // Provide a hook for user-specified inspect functions.
+  // Check that value is an object with an inspect function on it
+  if (ctx.customInspect &&
+      value &&
+      isFunction(value.inspect) &&
+      // Filter out the util module, it's inspect function is special
+      value.inspect !== exports.inspect &&
+      // Also filter out any prototype objects using the circular check.
+      !(value.constructor && value.constructor.prototype === value)) {
+    var ret = value.inspect(recurseTimes, ctx);
+    if (!isString(ret)) {
+      ret = formatValue(ctx, ret, recurseTimes);
+    }
+    return ret;
+  }
+
+  // Primitive types cannot have properties
+  var primitive = formatPrimitive(ctx, value);
+  if (primitive) {
+    return primitive;
+  }
+
+  // Look up the keys of the object.
+  var keys = Object.keys(value);
+  var visibleKeys = arrayToHash(keys);
+
+  if (ctx.showHidden) {
+    keys = Object.getOwnPropertyNames(value);
+  }
+
+  // IE doesn't make error fields non-enumerable
+  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
+  if (isError(value)
+      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
+    return formatError(value);
+  }
+
+  // Some type of object without properties can be shortcutted.
+  if (keys.length === 0) {
+    if (isFunction(value)) {
+      var name = value.name ? ': ' + value.name : '';
+      return ctx.stylize('[Function' + name + ']', 'special');
+    }
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    }
+    if (isDate(value)) {
+      return ctx.stylize(Date.prototype.toString.call(value), 'date');
+    }
+    if (isError(value)) {
+      return formatError(value);
+    }
+  }
+
+  var base = '', array = false, braces = ['{', '}'];
+
+  // Make Array say that they are Array
+  if (isArray(value)) {
+    array = true;
+    braces = ['[', ']'];
+  }
+
+  // Make functions say that they are functions
+  if (isFunction(value)) {
+    var n = value.name ? ': ' + value.name : '';
+    base = ' [Function' + n + ']';
+  }
+
+  // Make RegExps say that they are RegExps
+  if (isRegExp(value)) {
+    base = ' ' + RegExp.prototype.toString.call(value);
+  }
+
+  // Make dates with properties first say the date
+  if (isDate(value)) {
+    base = ' ' + Date.prototype.toUTCString.call(value);
+  }
+
+  // Make error with message first say the error
+  if (isError(value)) {
+    base = ' ' + formatError(value);
+  }
+
+  if (keys.length === 0 && (!array || value.length == 0)) {
+    return braces[0] + base + braces[1];
+  }
+
+  if (recurseTimes < 0) {
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    } else {
+      return ctx.stylize('[Object]', 'special');
+    }
+  }
+
+  ctx.seen.push(value);
+
+  var output;
+  if (array) {
+    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
+  } else {
+    output = keys.map(function(key) {
+      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
+    });
+  }
+
+  ctx.seen.pop();
+
+  return reduceToSingleString(output, base, braces);
+}
+
+
+function formatPrimitive(ctx, value) {
+  if (isUndefined(value))
+    return ctx.stylize('undefined', 'undefined');
+  if (isString(value)) {
+    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
+                                             .replace(/'/g, "\\'")
+                                             .replace(/\\"/g, '"') + '\'';
+    return ctx.stylize(simple, 'string');
+  }
+  if (isNumber(value))
+    return ctx.stylize('' + value, 'number');
+  if (isBoolean(value))
+    return ctx.stylize('' + value, 'boolean');
+  // For some reason typeof null is "object", so special case here.
+  if (isNull(value))
+    return ctx.stylize('null', 'null');
+}
+
+
+function formatError(value) {
+  return '[' + Error.prototype.toString.call(value) + ']';
+}
+
+
+function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
+  var output = [];
+  for (var i = 0, l = value.length; i < l; ++i) {
+    if (hasOwnProperty(value, String(i))) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          String(i), true));
+    } else {
+      output.push('');
+    }
+  }
+  keys.forEach(function(key) {
+    if (!key.match(/^\d+$/)) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          key, true));
+    }
+  });
+  return output;
+}
+
+
+function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
+  var name, str, desc;
+  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
+  if (desc.get) {
+    if (desc.set) {
+      str = ctx.stylize('[Getter/Setter]', 'special');
+    } else {
+      str = ctx.stylize('[Getter]', 'special');
+    }
+  } else {
+    if (desc.set) {
+      str = ctx.stylize('[Setter]', 'special');
+    }
+  }
+  if (!hasOwnProperty(visibleKeys, key)) {
+    name = '[' + key + ']';
+  }
+  if (!str) {
+    if (ctx.seen.indexOf(desc.value) < 0) {
+      if (isNull(recurseTimes)) {
+        str = formatValue(ctx, desc.value, null);
+      } else {
+        str = formatValue(ctx, desc.value, recurseTimes - 1);
+      }
+      if (str.indexOf('\n') > -1) {
+        if (array) {
+          str = str.split('\n').map(function(line) {
+            return '  ' + line;
+          }).join('\n').substr(2);
+        } else {
+          str = '\n' + str.split('\n').map(function(line) {
+            return '   ' + line;
+          }).join('\n');
+        }
+      }
+    } else {
+      str = ctx.stylize('[Circular]', 'special');
+    }
+  }
+  if (isUndefined(name)) {
+    if (array && key.match(/^\d+$/)) {
+      return str;
+    }
+    name = JSON.stringify('' + key);
+    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
+      name = name.substr(1, name.length - 2);
+      name = ctx.stylize(name, 'name');
+    } else {
+      name = name.replace(/'/g, "\\'")
+                 .replace(/\\"/g, '"')
+                 .replace(/(^"|"$)/g, "'");
+      name = ctx.stylize(name, 'string');
+    }
+  }
+
+  return name + ': ' + str;
+}
+
+
+function reduceToSingleString(output, base, braces) {
+  var numLinesEst = 0;
+  var length = output.reduce(function(prev, cur) {
+    numLinesEst++;
+    if (cur.indexOf('\n') >= 0) numLinesEst++;
+    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
+  }, 0);
+
+  if (length > 60) {
+    return braces[0] +
+           (base === '' ? '' : base + '\n ') +
+           ' ' +
+           output.join(',\n  ') +
+           ' ' +
+           braces[1];
+  }
+
+  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
+}
+
+
+// NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+function isArray(ar) {
+  return Array.isArray(ar);
+}
+exports.isArray = isArray;
+
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+exports.isBoolean = isBoolean;
+
+function isNull(arg) {
+  return arg === null;
+}
+exports.isNull = isNull;
+
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+exports.isNullOrUndefined = isNullOrUndefined;
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+exports.isNumber = isNumber;
+
+function isString(arg) {
+  return typeof arg === 'string';
+}
+exports.isString = isString;
+
+function isSymbol(arg) {
+  return typeof arg === 'symbol';
+}
+exports.isSymbol = isSymbol;
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+exports.isUndefined = isUndefined;
+
+function isRegExp(re) {
+  return isObject(re) && objectToString(re) === '[object RegExp]';
+}
+exports.isRegExp = isRegExp;
+
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+exports.isObject = isObject;
+
+function isDate(d) {
+  return isObject(d) && objectToString(d) === '[object Date]';
+}
+exports.isDate = isDate;
+
+function isError(e) {
+  return isObject(e) &&
+      (objectToString(e) === '[object Error]' || e instanceof Error);
+}
+exports.isError = isError;
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+exports.isFunction = isFunction;
+
+function isPrimitive(arg) {
+  return arg === null ||
+         typeof arg === 'boolean' ||
+         typeof arg === 'number' ||
+         typeof arg === 'string' ||
+         typeof arg === 'symbol' ||  // ES6 symbol
+         typeof arg === 'undefined';
+}
+exports.isPrimitive = isPrimitive;
+
+exports.isBuffer = require('./support/isBuffer');
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
+
+
+function pad(n) {
+  return n < 10 ? '0' + n.toString(10) : n.toString(10);
+}
+
+
+var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
+              'Oct', 'Nov', 'Dec'];
+
+// 26 Feb 16:19:34
+function timestamp() {
+  var d = new Date();
+  var time = [pad(d.getHours()),
+              pad(d.getMinutes()),
+              pad(d.getSeconds())].join(':');
+  return [d.getDate(), months[d.getMonth()], time].join(' ');
+}
+
+
+// log is just a thin wrapper to console.log that prepends a timestamp
+exports.log = function() {
+  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
+};
+
+
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * The Function.prototype.inherits from lang.js rewritten as a standalone
+ * function (not on Function.prototype). NOTE: If this file is to be loaded
+ * during bootstrapping this function needs to be rewritten using some native
+ * functions as prototype setup using normal JavaScript does not work as
+ * expected during bootstrapping (see mirror.js in r114903).
+ *
+ * @param {function} ctor Constructor function which needs to inherit the
+ *     prototype.
+ * @param {function} superCtor Constructor function to inherit prototype from.
+ */
+exports.inherits = require('inherits');
+
+exports._extend = function(origin, add) {
+  // Don't do anything if add isn't an object
+  if (!add || !isObject(add)) return origin;
+
+  var keys = Object.keys(add);
+  var i = keys.length;
+  while (i--) {
+    origin[keys[i]] = add[keys[i]];
+  }
+  return origin;
+};
+
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./support/isBuffer":28,"_process":14,"inherits":12}],30:[function(require,module,exports){
+// Base58 encoding/decoding
+// Originally written by Mike Hearn for BitcoinJ
+// Copyright (c) 2011 Google Inc
+// Ported to JavaScript by Stefan Thomas
+// Merged Buffer refactorings from base58-native by Stephen Pair
+// Copyright (c) 2013 BitPay Inc
+
+var ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
+var ALPHABET_MAP = {}
+for(var i = 0; i < ALPHABET.length; i++) {
+  ALPHABET_MAP[ALPHABET.charAt(i)] = i
+}
+var BASE = 58
+
+function encode(buffer) {
+  if (buffer.length === 0) return ''
+
+  var i, j, digits = [0]
+  for (i = 0; i < buffer.length; i++) {
+    for (j = 0; j < digits.length; j++) digits[j] <<= 8
+
+    digits[0] += buffer[i]
+
+    var carry = 0
+    for (j = 0; j < digits.length; ++j) {
+      digits[j] += carry
+
+      carry = (digits[j] / BASE) | 0
+      digits[j] %= BASE
+    }
+
+    while (carry) {
+      digits.push(carry % BASE)
+
+      carry = (carry / BASE) | 0
+    }
+  }
+
+  // deal with leading zeros
+  for (i = 0; buffer[i] === 0 && i < buffer.length - 1; i++) digits.push(0)
+
+  // convert digits to a string
+  var stringOutput = ""
+  for (var i = digits.length - 1; i >= 0; i--) {
+    stringOutput = stringOutput + ALPHABET[digits[i]]
+  }
+  return stringOutput
+}
+
+function decode(string) {
+  if (string.length === 0) return []
+
+  var i, j, bytes = [0]
+  for (i = 0; i < string.length; i++) {
+    var c = string[i]
+    if (!(c in ALPHABET_MAP)) throw new Error('Non-base58 character')
+
+    for (j = 0; j < bytes.length; j++) bytes[j] *= BASE
+    bytes[0] += ALPHABET_MAP[c]
+
+    var carry = 0
+    for (j = 0; j < bytes.length; ++j) {
+      bytes[j] += carry
+
+      carry = bytes[j] >> 8
+      bytes[j] &= 0xff
+    }
+
+    while (carry) {
+      bytes.push(carry & 0xff)
+
+      carry >>= 8
+    }
+  }
+
+  // deal with leading zeros
+  for (i = 0; string[i] === '1' && i < string.length - 1; i++) bytes.push(0)
+
+  return bytes.reverse()
+}
+
+module.exports = {
+  encode: encode,
+  decode: decode
+}
+
+},{}],31:[function(require,module,exports){
+(function (Buffer){
+'use strict'
+
+var base58 = require('bs58')
+var createHash = require('create-hash')
+
+// SHA256(SHA256(buffer))
+function sha256x2 (buffer) {
+  buffer = createHash('sha256').update(buffer).digest()
+  return createHash('sha256').update(buffer).digest()
+}
+
+// Encode a buffer as a base58-check encoded string
+function encode (payload) {
+  var checksum = sha256x2(payload).slice(0, 4)
+
+  return base58.encode(Buffer.concat([
+    payload,
+    checksum
+  ]))
+}
+
+// Decode a base58-check encoded string to a buffer
+function decode (string) {
+  var buffer = new Buffer(base58.decode(string))
+
+  var payload = buffer.slice(0, -4)
+  var checksum = buffer.slice(-4)
+  var newChecksum = sha256x2(payload).slice(0, 4)
+
+  for (var i = 0; i < newChecksum.length; ++i) {
+    if (newChecksum[i] === checksum[i]) continue
+
+    throw new Error('Invalid checksum')
+  }
+
+  return payload
+}
+
+module.exports = {
+  encode: encode,
+  decode: decode
+}
+
+}).call(this,require("buffer").Buffer)
+},{"bs58":30,"buffer":7,"create-hash":32}],32:[function(require,module,exports){
+(function (Buffer){
+'use strict';
+var inherits = require('inherits')
+var md5 = require('./md5')
+var rmd160 = require('ripemd160')
+var sha = require('sha.js')
+
+var Transform = require('stream').Transform
+
+function HashNoConstructor(hash) {
+  Transform.call(this)
+
+  this._hash = hash
+  this.buffers = []
+}
+
+inherits(HashNoConstructor, Transform)
+
+HashNoConstructor.prototype._transform = function (data, _, next) {
+  this.buffers.push(data)
+
+  next()
+}
+
+HashNoConstructor.prototype._flush = function (next) {
+  this.push(this.digest())
+  next()
+}
+
+HashNoConstructor.prototype.update = function (data, enc) {
+  if (typeof data === 'string') {
+    data = new Buffer(data, enc)
+  }
+
+  this.buffers.push(data)
+  return this
+}
+
+HashNoConstructor.prototype.digest = function (enc) {
+  var buf = Buffer.concat(this.buffers)
+  var r = this._hash(buf)
+  this.buffers = null
+
+  return enc ? r.toString(enc) : r
+}
+
+function Hash(hash) {
+  Transform.call(this)
+
+  this._hash = hash
+}
+
+inherits(Hash, Transform)
+
+Hash.prototype._transform = function (data, enc, next) {
+  if (enc) data = new Buffer(data, enc)
+
+  this._hash.update(data)
+
+  next()
+}
+
+Hash.prototype._flush = function (next) {
+  this.push(this._hash.digest())
+  this._hash = null
+
+  next()
+}
+
+Hash.prototype.update = function (data, enc) {
+  if (typeof data === 'string') {
+    data = new Buffer(data, enc)
+  }
+
+  this._hash.update(data)
+  return this
+}
+
+Hash.prototype.digest = function (enc) {
+  var outData = this._hash.digest()
+
+  return enc ? outData.toString(enc) : outData
+}
+
+module.exports = function createHash (alg) {
+  if ('md5' === alg) return new HashNoConstructor(md5)
+  if ('rmd160' === alg) return new HashNoConstructor(rmd160)
+
+  return new Hash(sha(alg))
+}
+
+}).call(this,require("buffer").Buffer)
+},{"./md5":34,"buffer":7,"inherits":35,"ripemd160":36,"sha.js":38,"stream":26}],33:[function(require,module,exports){
+(function (Buffer){
+'use strict';
+var intSize = 4;
+var zeroBuffer = new Buffer(intSize); zeroBuffer.fill(0);
+var chrsz = 8;
+
+function toArray(buf, bigEndian) {
+  if ((buf.length % intSize) !== 0) {
+    var len = buf.length + (intSize - (buf.length % intSize));
+    buf = Buffer.concat([buf, zeroBuffer], len);
+  }
+
+  var arr = [];
+  var fn = bigEndian ? buf.readInt32BE : buf.readInt32LE;
+  for (var i = 0; i < buf.length; i += intSize) {
+    arr.push(fn.call(buf, i));
+  }
+  return arr;
+}
+
+function toBuffer(arr, size, bigEndian) {
+  var buf = new Buffer(size);
+  var fn = bigEndian ? buf.writeInt32BE : buf.writeInt32LE;
+  for (var i = 0; i < arr.length; i++) {
+    fn.call(buf, arr[i], i * 4, true);
+  }
+  return buf;
+}
+
+function hash(buf, fn, hashSize, bigEndian) {
+  if (!Buffer.isBuffer(buf)) buf = new Buffer(buf);
+  var arr = fn(toArray(buf, bigEndian), buf.length * chrsz);
+  return toBuffer(arr, hashSize, bigEndian);
+}
+exports.hash = hash;
+}).call(this,require("buffer").Buffer)
+},{"buffer":7}],34:[function(require,module,exports){
+'use strict';
+/*
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
+
+var helpers = require('./helpers');
+
+/*
+ * Calculate the MD5 of an array of little-endian words, and a bit length
+ */
+function core_md5(x, len)
+{
+  /* append padding */
+  x[len >> 5] |= 0x80 << ((len) % 32);
+  x[(((len + 64) >>> 9) << 4) + 14] = len;
+
+  var a =  1732584193;
+  var b = -271733879;
+  var c = -1732584194;
+  var d =  271733878;
+
+  for(var i = 0; i < x.length; i += 16)
+  {
+    var olda = a;
+    var oldb = b;
+    var oldc = c;
+    var oldd = d;
+
+    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
+    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
+    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
+    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
+    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
+    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
+    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
+    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
+    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
+    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
+    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
+    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
+    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
+    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
+    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
+    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);
+
+    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
+    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
+    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
+    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
+    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
+    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
+    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
+    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
+    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
+    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
+    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
+    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
+    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
+    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
+    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
+    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
+
+    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
+    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
+    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
+    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
+    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
+    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
+    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
+    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
+    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
+    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
+    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
+    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
+    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
+    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
+    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
+    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
+
+    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
+    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
+    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
+    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
+    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
+    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
+    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
+    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
+    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
+    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
+    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
+    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
+    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
+    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
+    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
+    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
+
+    a = safe_add(a, olda);
+    b = safe_add(b, oldb);
+    c = safe_add(c, oldc);
+    d = safe_add(d, oldd);
+  }
+  return Array(a, b, c, d);
+
+}
+
+/*
+ * These functions implement the four basic operations the algorithm uses.
+ */
+function md5_cmn(q, a, b, x, s, t)
+{
+  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
+}
+function md5_ff(a, b, c, d, x, s, t)
+{
+  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
+}
+function md5_gg(a, b, c, d, x, s, t)
+{
+  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
+}
+function md5_hh(a, b, c, d, x, s, t)
+{
+  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+}
+function md5_ii(a, b, c, d, x, s, t)
+{
+  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
+}
+
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safe_add(x, y)
+{
+  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return (msw << 16) | (lsw & 0xFFFF);
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function bit_rol(num, cnt)
+{
+  return (num << cnt) | (num >>> (32 - cnt));
+}
+
+module.exports = function md5(buf) {
+  return helpers.hash(buf, core_md5, 16);
+};
+},{"./helpers":33}],35:[function(require,module,exports){
+arguments[4][12][0].apply(exports,arguments)
+},{"dup":12}],36:[function(require,module,exports){
+(function (Buffer){
+/*
+CryptoJS v3.1.2
+code.google.com/p/crypto-js
+(c) 2009-2013 by Jeff Mott. All rights reserved.
+code.google.com/p/crypto-js/wiki/License
+*/
+/** @preserve
+(c) 2012 by Cédric Mesnil. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+// constants table
+var zl = [
+  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+  7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
+  3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
+  1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
+  4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
+]
+
+var zr = [
+  5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
+  6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
+  15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
+  8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
+  12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
+]
+
+var sl = [
+  11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
+  7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
+  11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
+  11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
+  9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
+]
+
+var sr = [
+  8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
+  9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
+  9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
+  15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
+  8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
+]
+
+var hl = [0x00000000, 0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xA953FD4E]
+var hr = [0x50A28BE6, 0x5C4DD124, 0x6D703EF3, 0x7A6D76E9, 0x00000000]
+
+function bytesToWords (bytes) {
+  var words = []
+  for (var i = 0, b = 0; i < bytes.length; i++, b += 8) {
+    words[b >>> 5] |= bytes[i] << (24 - b % 32)
+  }
+  return words
+}
+
+function wordsToBytes (words) {
+  var bytes = []
+  for (var b = 0; b < words.length * 32; b += 8) {
+    bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF)
+  }
+  return bytes
+}
+
+function processBlock (H, M, offset) {
+  // swap endian
+  for (var i = 0; i < 16; i++) {
+    var offset_i = offset + i
+    var M_offset_i = M[offset_i]
+
+    // Swap
+    M[offset_i] = (
+      (((M_offset_i << 8) | (M_offset_i >>> 24)) & 0x00ff00ff) |
+      (((M_offset_i << 24) | (M_offset_i >>> 8)) & 0xff00ff00)
+    )
+  }
+
+  // Working variables
+  var al, bl, cl, dl, el
+  var ar, br, cr, dr, er
+
+  ar = al = H[0]
+  br = bl = H[1]
+  cr = cl = H[2]
+  dr = dl = H[3]
+  er = el = H[4]
+
+  // computation
+  var t
+  for (i = 0; i < 80; i += 1) {
+    t = (al + M[offset + zl[i]]) | 0
+    if (i < 16) {
+      t += f1(bl, cl, dl) + hl[0]
+    } else if (i < 32) {
+      t += f2(bl, cl, dl) + hl[1]
+    } else if (i < 48) {
+      t += f3(bl, cl, dl) + hl[2]
+    } else if (i < 64) {
+      t += f4(bl, cl, dl) + hl[3]
+    } else {// if (i<80) {
+      t += f5(bl, cl, dl) + hl[4]
+    }
+    t = t | 0
+    t = rotl(t, sl[i])
+    t = (t + el) | 0
+    al = el
+    el = dl
+    dl = rotl(cl, 10)
+    cl = bl
+    bl = t
+
+    t = (ar + M[offset + zr[i]]) | 0
+    if (i < 16) {
+      t += f5(br, cr, dr) + hr[0]
+    } else if (i < 32) {
+      t += f4(br, cr, dr) + hr[1]
+    } else if (i < 48) {
+      t += f3(br, cr, dr) + hr[2]
+    } else if (i < 64) {
+      t += f2(br, cr, dr) + hr[3]
+    } else {// if (i<80) {
+      t += f1(br, cr, dr) + hr[4]
+    }
+
+    t = t | 0
+    t = rotl(t, sr[i])
+    t = (t + er) | 0
+    ar = er
+    er = dr
+    dr = rotl(cr, 10)
+    cr = br
+    br = t
+  }
+
+  // intermediate hash value
+  t = (H[1] + cl + dr) | 0
+  H[1] = (H[2] + dl + er) | 0
+  H[2] = (H[3] + el + ar) | 0
+  H[3] = (H[4] + al + br) | 0
+  H[4] = (H[0] + bl + cr) | 0
+  H[0] = t
+}
+
+function f1 (x, y, z) {
+  return ((x) ^ (y) ^ (z))
+}
+
+function f2 (x, y, z) {
+  return (((x) & (y)) | ((~x) & (z)))
+}
+
+function f3 (x, y, z) {
+  return (((x) | (~(y))) ^ (z))
+}
+
+function f4 (x, y, z) {
+  return (((x) & (z)) | ((y) & (~(z))))
+}
+
+function f5 (x, y, z) {
+  return ((x) ^ ((y) | (~(z))))
+}
+
+function rotl (x, n) {
+  return (x << n) | (x >>> (32 - n))
+}
+
+function ripemd160 (message) {
+  var H = [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0]
+
+  if (typeof message === 'string') {
+    message = new Buffer(message, 'utf8')
+  }
+
+  var m = bytesToWords(message)
+
+  var nBitsLeft = message.length * 8
+  var nBitsTotal = message.length * 8
+
+  // Add padding
+  m[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32)
+  m[(((nBitsLeft + 64) >>> 9) << 4) + 14] = (
+    (((nBitsTotal << 8) | (nBitsTotal >>> 24)) & 0x00ff00ff) |
+    (((nBitsTotal << 24) | (nBitsTotal >>> 8)) & 0xff00ff00)
+  )
+
+  for (var i = 0; i < m.length; i += 16) {
+    processBlock(H, m, i)
+  }
+
+  // swap endian
+  for (i = 0; i < 5; i++) {
+    // shortcut
+    var H_i = H[i]
+
+    // Swap
+    H[i] = (((H_i << 8) | (H_i >>> 24)) & 0x00ff00ff) |
+      (((H_i << 24) | (H_i >>> 8)) & 0xff00ff00)
+  }
+
+  var digestbytes = wordsToBytes(H)
+  return new Buffer(digestbytes)
+}
+
+module.exports = ripemd160
+
+}).call(this,require("buffer").Buffer)
+},{"buffer":7}],37:[function(require,module,exports){
+(function (Buffer){
+// prototype class for hash functions
+function Hash (blockSize, finalSize) {
+  this._block = new Buffer(blockSize)
+  this._finalSize = finalSize
+  this._blockSize = blockSize
+  this._len = 0
+  this._s = 0
+}
+
+Hash.prototype.update = function (data, enc) {
+  if (typeof data === 'string') {
+    enc = enc || 'utf8'
+    data = new Buffer(data, enc)
+  }
+
+  var l = this._len += data.length
+  var s = this._s || 0
+  var f = 0
+  var buffer = this._block
+
+  while (s < l) {
+    var t = Math.min(data.length, f + this._blockSize - (s % this._blockSize))
+    var ch = (t - f)
+
+    for (var i = 0; i < ch; i++) {
+      buffer[(s % this._blockSize) + i] = data[i + f]
+    }
+
+    s += ch
+    f += ch
+
+    if ((s % this._blockSize) === 0) {
+      this._update(buffer)
+    }
+  }
+  this._s = s
+
+  return this
+}
+
+Hash.prototype.digest = function (enc) {
+  // Suppose the length of the message M, in bits, is l
+  var l = this._len * 8
+
+  // Append the bit 1 to the end of the message
+  this._block[this._len % this._blockSize] = 0x80
+
+  // and then k zero bits, where k is the smallest non-negative solution to the equation (l + 1 + k) === finalSize mod blockSize
+  this._block.fill(0, this._len % this._blockSize + 1)
+
+  if (l % (this._blockSize * 8) >= this._finalSize * 8) {
+    this._update(this._block)
+    this._block.fill(0)
+  }
+
+  // to this append the block which is equal to the number l written in binary
+  // TODO: handle case where l is > Math.pow(2, 29)
+  this._block.writeInt32BE(l, this._blockSize - 4)
+
+  var hash = this._update(this._block) || this._hash()
+
+  return enc ? hash.toString(enc) : hash
+}
+
+Hash.prototype._update = function () {
+  throw new Error('_update must be implemented by subclass')
+}
+
+module.exports = Hash
+
+}).call(this,require("buffer").Buffer)
+},{"buffer":7}],38:[function(require,module,exports){
+var exports = module.exports = function SHA (algorithm) {
+  algorithm = algorithm.toLowerCase()
+
+  var Algorithm = exports[algorithm]
+  if (!Algorithm) throw new Error(algorithm + ' is not supported (we accept pull requests)')
+
+  return new Algorithm()
+}
+
+exports.sha = require('./sha')
+exports.sha1 = require('./sha1')
+exports.sha224 = require('./sha224')
+exports.sha256 = require('./sha256')
+exports.sha384 = require('./sha384')
+exports.sha512 = require('./sha512')
+
+},{"./sha":39,"./sha1":40,"./sha224":41,"./sha256":42,"./sha384":43,"./sha512":44}],39:[function(require,module,exports){
+(function (Buffer){
+/*
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-0, as defined
+ * in FIPS PUB 180-1
+ * This source code is derived from sha1.js of the same repository.
+ * The difference between SHA-0 and SHA-1 is just a bitwise rotate left
+ * operation was added.
+ */
+
+var inherits = require('inherits')
+var Hash = require('./hash')
+
+var W = new Array(80)
+
+function Sha () {
+  this.init()
+  this._w = W
+
+  Hash.call(this, 64, 56)
+}
+
+inherits(Sha, Hash)
+
+Sha.prototype.init = function () {
+  this._a = 0x67452301 | 0
+  this._b = 0xefcdab89 | 0
+  this._c = 0x98badcfe | 0
+  this._d = 0x10325476 | 0
+  this._e = 0xc3d2e1f0 | 0
+
+  return this
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function rol (num, cnt) {
+  return (num << cnt) | (num >>> (32 - cnt))
+}
+
+Sha.prototype._update = function (M) {
+  var W = this._w
+
+  var a = this._a
+  var b = this._b
+  var c = this._c
+  var d = this._d
+  var e = this._e
+
+  var j = 0, k
+
+  /*
+   * SHA-1 has a bitwise rotate left operation. But, SHA is not
+   * function calcW() { return rol(W[j - 3] ^ W[j -  8] ^ W[j - 14] ^ W[j - 16], 1) }
+   */
+  function calcW () { return W[j - 3] ^ W[j - 8] ^ W[j - 14] ^ W[j - 16] }
+  function loop (w, f) {
+    W[j] = w
+
+    var t = rol(a, 5) + f + e + w + k
+
+    e = d
+    d = c
+    c = rol(b, 30)
+    b = a
+    a = t
+    j++
+  }
+
+  k = 1518500249
+  while (j < 16) loop(M.readInt32BE(j * 4), (b & c) | ((~b) & d))
+  while (j < 20) loop(calcW(), (b & c) | ((~b) & d))
+  k = 1859775393
+  while (j < 40) loop(calcW(), b ^ c ^ d)
+  k = -1894007588
+  while (j < 60) loop(calcW(), (b & c) | (b & d) | (c & d))
+  k = -899497514
+  while (j < 80) loop(calcW(), b ^ c ^ d)
+
+  this._a = (a + this._a) | 0
+  this._b = (b + this._b) | 0
+  this._c = (c + this._c) | 0
+  this._d = (d + this._d) | 0
+  this._e = (e + this._e) | 0
+}
+
+Sha.prototype._hash = function () {
+  var H = new Buffer(20)
+
+  H.writeInt32BE(this._a | 0, 0)
+  H.writeInt32BE(this._b | 0, 4)
+  H.writeInt32BE(this._c | 0, 8)
+  H.writeInt32BE(this._d | 0, 12)
+  H.writeInt32BE(this._e | 0, 16)
+
+  return H
+}
+
+module.exports = Sha
+
+
+}).call(this,require("buffer").Buffer)
+},{"./hash":37,"buffer":7,"inherits":35}],40:[function(require,module,exports){
+(function (Buffer){
+/*
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
+ * in FIPS PUB 180-1
+ * Version 2.1a Copyright Paul Johnston 2000 - 2002.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for details.
+ */
+
+var inherits = require('inherits')
+var Hash = require('./hash')
+
+var W = new Array(80)
+
+function Sha1 () {
+  this.init()
+  this._w = W
+
+  Hash.call(this, 64, 56)
+}
+
+inherits(Sha1, Hash)
+
+Sha1.prototype.init = function () {
+  this._a = 0x67452301 | 0
+  this._b = 0xefcdab89 | 0
+  this._c = 0x98badcfe | 0
+  this._d = 0x10325476 | 0
+  this._e = 0xc3d2e1f0 | 0
+
+  return this
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function rol (num, cnt) {
+  return (num << cnt) | (num >>> (32 - cnt))
+}
+
+Sha1.prototype._update = function (M) {
+  var W = this._w
+
+  var a = this._a
+  var b = this._b
+  var c = this._c
+  var d = this._d
+  var e = this._e
+
+  var j = 0, k
+
+  function calcW () { return rol(W[j - 3] ^ W[j - 8] ^ W[j - 14] ^ W[j - 16], 1) }
+  function loop (w, f) {
+    W[j] = w
+
+    var t = rol(a, 5) + f + e + w + k
+
+    e = d
+    d = c
+    c = rol(b, 30)
+    b = a
+    a = t
+    j++
+  }
+
+  k = 1518500249
+  while (j < 16) loop(M.readInt32BE(j * 4), (b & c) | ((~b) & d))
+  while (j < 20) loop(calcW(), (b & c) | ((~b) & d))
+  k = 1859775393
+  while (j < 40) loop(calcW(), b ^ c ^ d)
+  k = -1894007588
+  while (j < 60) loop(calcW(), (b & c) | (b & d) | (c & d))
+  k = -899497514
+  while (j < 80) loop(calcW(), b ^ c ^ d)
+
+  this._a = (a + this._a) | 0
+  this._b = (b + this._b) | 0
+  this._c = (c + this._c) | 0
+  this._d = (d + this._d) | 0
+  this._e = (e + this._e) | 0
+}
+
+Sha1.prototype._hash = function () {
+  var H = new Buffer(20)
+
+  H.writeInt32BE(this._a | 0, 0)
+  H.writeInt32BE(this._b | 0, 4)
+  H.writeInt32BE(this._c | 0, 8)
+  H.writeInt32BE(this._d | 0, 12)
+  H.writeInt32BE(this._e | 0, 16)
+
+  return H
+}
+
+module.exports = Sha1
+
+}).call(this,require("buffer").Buffer)
+},{"./hash":37,"buffer":7,"inherits":35}],41:[function(require,module,exports){
+(function (Buffer){
+/**
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
+ * in FIPS 180-2
+ * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ *
+ */
+
+var inherits = require('inherits')
+var Sha256 = require('./sha256')
+var Hash = require('./hash')
+
+var W = new Array(64)
+
+function Sha224 () {
+  this.init()
+
+  this._w = W // new Array(64)
+
+  Hash.call(this, 64, 56)
+}
+
+inherits(Sha224, Sha256)
+
+Sha224.prototype.init = function () {
+  this._a = 0xc1059ed8 | 0
+  this._b = 0x367cd507 | 0
+  this._c = 0x3070dd17 | 0
+  this._d = 0xf70e5939 | 0
+  this._e = 0xffc00b31 | 0
+  this._f = 0x68581511 | 0
+  this._g = 0x64f98fa7 | 0
+  this._h = 0xbefa4fa4 | 0
+
+  return this
+}
+
+Sha224.prototype._hash = function () {
+  var H = new Buffer(28)
+
+  H.writeInt32BE(this._a, 0)
+  H.writeInt32BE(this._b, 4)
+  H.writeInt32BE(this._c, 8)
+  H.writeInt32BE(this._d, 12)
+  H.writeInt32BE(this._e, 16)
+  H.writeInt32BE(this._f, 20)
+  H.writeInt32BE(this._g, 24)
+
+  return H
+}
+
+module.exports = Sha224
+
+}).call(this,require("buffer").Buffer)
+},{"./hash":37,"./sha256":42,"buffer":7,"inherits":35}],42:[function(require,module,exports){
+(function (Buffer){
+/**
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
+ * in FIPS 180-2
+ * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ *
+ */
+
+var inherits = require('inherits')
+var Hash = require('./hash')
+
+var K = [
+  0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
+  0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
+  0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
+  0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
+  0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
+  0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
+  0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
+  0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
+  0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
+  0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
+  0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
+  0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
+  0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
+  0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
+  0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
+  0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2
+]
+
+var W = new Array(64)
+
+function Sha256 () {
+  this.init()
+
+  this._w = W // new Array(64)
+
+  Hash.call(this, 64, 56)
+}
+
+inherits(Sha256, Hash)
+
+Sha256.prototype.init = function () {
+  this._a = 0x6a09e667 | 0
+  this._b = 0xbb67ae85 | 0
+  this._c = 0x3c6ef372 | 0
+  this._d = 0xa54ff53a | 0
+  this._e = 0x510e527f | 0
+  this._f = 0x9b05688c | 0
+  this._g = 0x1f83d9ab | 0
+  this._h = 0x5be0cd19 | 0
+
+  return this
+}
+
+function S (X, n) {
+  return (X >>> n) | (X << (32 - n))
+}
+
+function R (X, n) {
+  return (X >>> n)
+}
+
+function Ch (x, y, z) {
+  return ((x & y) ^ ((~x) & z))
+}
+
+function Maj (x, y, z) {
+  return ((x & y) ^ (x & z) ^ (y & z))
+}
+
+function Sigma0256 (x) {
+  return (S(x, 2) ^ S(x, 13) ^ S(x, 22))
+}
+
+function Sigma1256 (x) {
+  return (S(x, 6) ^ S(x, 11) ^ S(x, 25))
+}
+
+function Gamma0256 (x) {
+  return (S(x, 7) ^ S(x, 18) ^ R(x, 3))
+}
+
+function Gamma1256 (x) {
+  return (S(x, 17) ^ S(x, 19) ^ R(x, 10))
+}
+
+Sha256.prototype._update = function (M) {
+  var W = this._w
+
+  var a = this._a | 0
+  var b = this._b | 0
+  var c = this._c | 0
+  var d = this._d | 0
+  var e = this._e | 0
+  var f = this._f | 0
+  var g = this._g | 0
+  var h = this._h | 0
+
+  var j = 0
+
+  function calcW () { return Gamma1256(W[j - 2]) + W[j - 7] + Gamma0256(W[j - 15]) + W[j - 16] }
+  function loop (w) {
+    W[j] = w
+
+    var T1 = h + Sigma1256(e) + Ch(e, f, g) + K[j] + w
+    var T2 = Sigma0256(a) + Maj(a, b, c)
+
+    h = g
+    g = f
+    f = e
+    e = d + T1
+    d = c
+    c = b
+    b = a
+    a = T1 + T2
+
+    j++
+  }
+
+  while (j < 16) loop(M.readInt32BE(j * 4))
+  while (j < 64) loop(calcW())
+
+  this._a = (a + this._a) | 0
+  this._b = (b + this._b) | 0
+  this._c = (c + this._c) | 0
+  this._d = (d + this._d) | 0
+  this._e = (e + this._e) | 0
+  this._f = (f + this._f) | 0
+  this._g = (g + this._g) | 0
+  this._h = (h + this._h) | 0
+}
+
+Sha256.prototype._hash = function () {
+  var H = new Buffer(32)
+
+  H.writeInt32BE(this._a, 0)
+  H.writeInt32BE(this._b, 4)
+  H.writeInt32BE(this._c, 8)
+  H.writeInt32BE(this._d, 12)
+  H.writeInt32BE(this._e, 16)
+  H.writeInt32BE(this._f, 20)
+  H.writeInt32BE(this._g, 24)
+  H.writeInt32BE(this._h, 28)
+
+  return H
+}
+
+module.exports = Sha256
+
+}).call(this,require("buffer").Buffer)
+},{"./hash":37,"buffer":7,"inherits":35}],43:[function(require,module,exports){
+(function (Buffer){
+var inherits = require('inherits')
+var SHA512 = require('./sha512')
+var Hash = require('./hash')
+
+var W = new Array(160)
+
+function Sha384 () {
+  this.init()
+  this._w = W
+
+  Hash.call(this, 128, 112)
+}
+
+inherits(Sha384, SHA512)
+
+Sha384.prototype.init = function () {
+  this._a = 0xcbbb9d5d | 0
+  this._b = 0x629a292a | 0
+  this._c = 0x9159015a | 0
+  this._d = 0x152fecd8 | 0
+  this._e = 0x67332667 | 0
+  this._f = 0x8eb44a87 | 0
+  this._g = 0xdb0c2e0d | 0
+  this._h = 0x47b5481d | 0
+
+  this._al = 0xc1059ed8 | 0
+  this._bl = 0x367cd507 | 0
+  this._cl = 0x3070dd17 | 0
+  this._dl = 0xf70e5939 | 0
+  this._el = 0xffc00b31 | 0
+  this._fl = 0x68581511 | 0
+  this._gl = 0x64f98fa7 | 0
+  this._hl = 0xbefa4fa4 | 0
+
+  return this
+}
+
+Sha384.prototype._hash = function () {
+  var H = new Buffer(48)
+
+  function writeInt64BE (h, l, offset) {
+    H.writeInt32BE(h, offset)
+    H.writeInt32BE(l, offset + 4)
+  }
+
+  writeInt64BE(this._a, this._al, 0)
+  writeInt64BE(this._b, this._bl, 8)
+  writeInt64BE(this._c, this._cl, 16)
+  writeInt64BE(this._d, this._dl, 24)
+  writeInt64BE(this._e, this._el, 32)
+  writeInt64BE(this._f, this._fl, 40)
+
+  return H
+}
+
+module.exports = Sha384
+
+}).call(this,require("buffer").Buffer)
+},{"./hash":37,"./sha512":44,"buffer":7,"inherits":35}],44:[function(require,module,exports){
+(function (Buffer){
+var inherits = require('inherits')
+var Hash = require('./hash')
+
+var K = [
+  0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd,
+  0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,
+  0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019,
+  0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,
+  0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe,
+  0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,
+  0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1,
+  0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,
+  0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3,
+  0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,
+  0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483,
+  0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,
+  0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210,
+  0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,
+  0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725,
+  0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,
+  0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926,
+  0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,
+  0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8,
+  0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,
+  0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001,
+  0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,
+  0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910,
+  0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,
+  0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53,
+  0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,
+  0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb,
+  0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,
+  0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60,
+  0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,
+  0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9,
+  0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,
+  0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207,
+  0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,
+  0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6,
+  0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,
+  0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493,
+  0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,
+  0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a,
+  0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817
+]
+
+var W = new Array(160)
+
+function Sha512 () {
+  this.init()
+  this._w = W
+
+  Hash.call(this, 128, 112)
+}
+
+inherits(Sha512, Hash)
+
+Sha512.prototype.init = function () {
+  this._a = 0x6a09e667 | 0
+  this._b = 0xbb67ae85 | 0
+  this._c = 0x3c6ef372 | 0
+  this._d = 0xa54ff53a | 0
+  this._e = 0x510e527f | 0
+  this._f = 0x9b05688c | 0
+  this._g = 0x1f83d9ab | 0
+  this._h = 0x5be0cd19 | 0
+
+  this._al = 0xf3bcc908 | 0
+  this._bl = 0x84caa73b | 0
+  this._cl = 0xfe94f82b | 0
+  this._dl = 0x5f1d36f1 | 0
+  this._el = 0xade682d1 | 0
+  this._fl = 0x2b3e6c1f | 0
+  this._gl = 0xfb41bd6b | 0
+  this._hl = 0x137e2179 | 0
+
+  return this
+}
+
+function S (X, Xl, n) {
+  return (X >>> n) | (Xl << (32 - n))
+}
+
+function Ch (x, y, z) {
+  return ((x & y) ^ ((~x) & z))
+}
+
+function Maj (x, y, z) {
+  return ((x & y) ^ (x & z) ^ (y & z))
+}
+
+Sha512.prototype._update = function (M) {
+  var W = this._w
+
+  var a = this._a | 0
+  var b = this._b | 0
+  var c = this._c | 0
+  var d = this._d | 0
+  var e = this._e | 0
+  var f = this._f | 0
+  var g = this._g | 0
+  var h = this._h | 0
+
+  var al = this._al | 0
+  var bl = this._bl | 0
+  var cl = this._cl | 0
+  var dl = this._dl | 0
+  var el = this._el | 0
+  var fl = this._fl | 0
+  var gl = this._gl | 0
+  var hl = this._hl | 0
+
+  var i = 0, j = 0
+  var Wi, Wil
+  function calcW () {
+    var x = W[j - 15 * 2]
+    var xl = W[j - 15 * 2 + 1]
+    var gamma0 = S(x, xl, 1) ^ S(x, xl, 8) ^ (x >>> 7)
+    var gamma0l = S(xl, x, 1) ^ S(xl, x, 8) ^ S(xl, x, 7)
+
+    x = W[j - 2 * 2]
+    xl = W[j - 2 * 2 + 1]
+    var gamma1 = S(x, xl, 19) ^ S(xl, x, 29) ^ (x >>> 6)
+    var gamma1l = S(xl, x, 19) ^ S(x, xl, 29) ^ S(xl, x, 6)
+
+    // W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16]
+    var Wi7 = W[j - 7 * 2]
+    var Wi7l = W[j - 7 * 2 + 1]
+
+    var Wi16 = W[j - 16 * 2]
+    var Wi16l = W[j - 16 * 2 + 1]
+
+    Wil = gamma0l + Wi7l
+    Wi = gamma0 + Wi7 + ((Wil >>> 0) < (gamma0l >>> 0) ? 1 : 0)
+    Wil = Wil + gamma1l
+    Wi = Wi + gamma1 + ((Wil >>> 0) < (gamma1l >>> 0) ? 1 : 0)
+    Wil = Wil + Wi16l
+    Wi = Wi + Wi16 + ((Wil >>> 0) < (Wi16l >>> 0) ? 1 : 0)
+  }
+
+  function loop () {
+    W[j] = Wi
+    W[j + 1] = Wil
+
+    var maj = Maj(a, b, c)
+    var majl = Maj(al, bl, cl)
+
+    var sigma0h = S(a, al, 28) ^ S(al, a, 2) ^ S(al, a, 7)
+    var sigma0l = S(al, a, 28) ^ S(a, al, 2) ^ S(a, al, 7)
+    var sigma1h = S(e, el, 14) ^ S(e, el, 18) ^ S(el, e, 9)
+    var sigma1l = S(el, e, 14) ^ S(el, e, 18) ^ S(e, el, 9)
+
+    // t1 = h + sigma1 + ch + K[i] + W[i]
+    var Ki = K[j]
+    var Kil = K[j + 1]
+
+    var ch = Ch(e, f, g)
+    var chl = Ch(el, fl, gl)
+
+    var t1l = hl + sigma1l
+    var t1 = h + sigma1h + ((t1l >>> 0) < (hl >>> 0) ? 1 : 0)
+    t1l = t1l + chl
+    t1 = t1 + ch + ((t1l >>> 0) < (chl >>> 0) ? 1 : 0)
+    t1l = t1l + Kil
+    t1 = t1 + Ki + ((t1l >>> 0) < (Kil >>> 0) ? 1 : 0)
+    t1l = t1l + Wil
+    t1 = t1 + Wi + ((t1l >>> 0) < (Wil >>> 0) ? 1 : 0)
+
+    // t2 = sigma0 + maj
+    var t2l = sigma0l + majl
+    var t2 = sigma0h + maj + ((t2l >>> 0) < (sigma0l >>> 0) ? 1 : 0)
+
+    h = g
+    hl = gl
+    g = f
+    gl = fl
+    f = e
+    fl = el
+    el = (dl + t1l) | 0
+    e = (d + t1 + ((el >>> 0) < (dl >>> 0) ? 1 : 0)) | 0
+    d = c
+    dl = cl
+    c = b
+    cl = bl
+    b = a
+    bl = al
+    al = (t1l + t2l) | 0
+    a = (t1 + t2 + ((al >>> 0) < (t1l >>> 0) ? 1 : 0)) | 0
+
+    i++
+    j += 2
+  }
+
+  while (i < 16) {
+    Wi = M.readInt32BE(j * 4)
+    Wil = M.readInt32BE(j * 4 + 4)
+
+    loop()
+  }
+
+  while (i < 80) {
+    calcW()
+    loop()
+  }
+
+  this._al = (this._al + al) | 0
+  this._bl = (this._bl + bl) | 0
+  this._cl = (this._cl + cl) | 0
+  this._dl = (this._dl + dl) | 0
+  this._el = (this._el + el) | 0
+  this._fl = (this._fl + fl) | 0
+  this._gl = (this._gl + gl) | 0
+  this._hl = (this._hl + hl) | 0
+
+  this._a = (this._a + a + ((this._al >>> 0) < (al >>> 0) ? 1 : 0)) | 0
+  this._b = (this._b + b + ((this._bl >>> 0) < (bl >>> 0) ? 1 : 0)) | 0
+  this._c = (this._c + c + ((this._cl >>> 0) < (cl >>> 0) ? 1 : 0)) | 0
+  this._d = (this._d + d + ((this._dl >>> 0) < (dl >>> 0) ? 1 : 0)) | 0
+  this._e = (this._e + e + ((this._el >>> 0) < (el >>> 0) ? 1 : 0)) | 0
+  this._f = (this._f + f + ((this._fl >>> 0) < (fl >>> 0) ? 1 : 0)) | 0
+  this._g = (this._g + g + ((this._gl >>> 0) < (gl >>> 0) ? 1 : 0)) | 0
+  this._h = (this._h + h + ((this._hl >>> 0) < (hl >>> 0) ? 1 : 0)) | 0
+}
+
+Sha512.prototype._hash = function () {
+  var H = new Buffer(64)
+
+  function writeInt64BE (h, l, offset) {
+    H.writeInt32BE(h, offset)
+    H.writeInt32BE(l, offset + 4)
+  }
+
+  writeInt64BE(this._a, this._al, 0)
+  writeInt64BE(this._b, this._bl, 8)
+  writeInt64BE(this._c, this._cl, 16)
+  writeInt64BE(this._d, this._dl, 24)
+  writeInt64BE(this._e, this._el, 32)
+  writeInt64BE(this._f, this._fl, 40)
+  writeInt64BE(this._g, this._gl, 48)
+  writeInt64BE(this._h, this._hl, 56)
+
+  return H
+}
+
+module.exports = Sha512
+
+}).call(this,require("buffer").Buffer)
+},{"./hash":37,"buffer":7,"inherits":35}],45:[function(require,module,exports){
+(function (Buffer){
+'use strict';
+var createHash = require('create-hash/browser');
+var inherits = require('inherits')
+
+var Transform = require('stream').Transform
+
+var ZEROS = new Buffer(128)
+ZEROS.fill(0)
+
+function Hmac(alg, key) {
+  Transform.call(this)
+
+  if (typeof key === 'string') {
+    key = new Buffer(key)
+  }
+
+  var blocksize = (alg === 'sha512' || alg === 'sha384') ? 128 : 64
+
+  this._alg = alg
+  this._key = key
+
+  if (key.length > blocksize) {
+    key = createHash(alg).update(key).digest()
+
+  } else if (key.length < blocksize) {
+    key = Buffer.concat([key, ZEROS], blocksize)
+  }
+
+  var ipad = this._ipad = new Buffer(blocksize)
+  var opad = this._opad = new Buffer(blocksize)
+
+  for (var i = 0; i < blocksize; i++) {
+    ipad[i] = key[i] ^ 0x36
+    opad[i] = key[i] ^ 0x5C
+  }
+
+  this._hash = createHash(alg).update(ipad)
+}
+
+inherits(Hmac, Transform)
+
+Hmac.prototype.update = function (data, enc) {
+  this._hash.update(data, enc)
+
+  return this
+}
+
+Hmac.prototype._transform = function (data, _, next) {
+  this._hash.update(data)
+
+  next()
+}
+
+Hmac.prototype._flush = function (next) {
+  this.push(this.digest())
+
+  next()
+}
+
+Hmac.prototype.digest = function (enc) {
+  var h = this._hash.digest()
+
+  return createHash(this._alg).update(this._opad).update(h).digest(enc)
+}
+
+module.exports = function createHmac(alg, key) {
+  return new Hmac(alg, key)
+}
+
+}).call(this,require("buffer").Buffer)
+},{"buffer":7,"create-hash/browser":32,"inherits":46,"stream":26}],46:[function(require,module,exports){
+arguments[4][12][0].apply(exports,arguments)
+},{"dup":12}],47:[function(require,module,exports){
+var assert = require('assert')
+var BigInteger = require('bigi')
+
+var Point = require('./point')
+
+function Curve(p, a, b, Gx, Gy, n, h) {
+  this.p = p
+  this.a = a
+  this.b = b
+  this.G = Point.fromAffine(this, Gx, Gy)
+  this.n = n
+  this.h = h
+
+  this.infinity = new Point(this, null, null, BigInteger.ZERO)
+
+  // result caching
+  this.pOverFour = p.add(BigInteger.ONE).shiftRight(2)
+}
+
+Curve.prototype.pointFromX = function(isOdd, x) {
+  var alpha = x.pow(3).add(this.a.multiply(x)).add(this.b).mod(this.p)
+  var beta = alpha.modPow(this.pOverFour, this.p) // XXX: not compatible with all curves
+
+  var y = beta
+  if (beta.isEven() ^ !isOdd) {
+    y = this.p.subtract(y) // -y % p
+  }
+
+  return Point.fromAffine(this, x, y)
+}
+
+Curve.prototype.isInfinity = function(Q) {
+  if (Q === this.infinity) return true
+
+  return Q.z.signum() === 0 && Q.y.signum() !== 0
+}
+
+Curve.prototype.isOnCurve = function(Q) {
+  if (this.isInfinity(Q)) return true
+
+  var x = Q.affineX
+  var y = Q.affineY
+  var a = this.a
+  var b = this.b
+  var p = this.p
+
+  // Check that xQ and yQ are integers in the interval [0, p - 1]
+  if (x.signum() < 0 || x.compareTo(p) >= 0) return false
+  if (y.signum() < 0 || y.compareTo(p) >= 0) return false
+
+  // and check that y^2 = x^3 + ax + b (mod p)
+  var lhs = y.square().mod(p)
+  var rhs = x.pow(3).add(a.multiply(x)).add(b).mod(p)
+  return lhs.equals(rhs)
+}
+
+/**
+ * Validate an elliptic curve point.
+ *
+ * See SEC 1, section 3.2.2.1: Elliptic Curve Public Key Validation Primitive
+ */
+Curve.prototype.validate = function(Q) {
+  // Check Q != O
+  assert(!this.isInfinity(Q), 'Point is at infinity')
+  assert(this.isOnCurve(Q), 'Point is not on the curve')
+
+  // Check nQ = O (where Q is a scalar multiple of G)
+  var nQ = Q.multiply(this.n)
+  assert(this.isInfinity(nQ), 'Point is not a scalar multiple of G')
+
+  return true
+}
+
+module.exports = Curve
+
+},{"./point":51,"assert":5,"bigi":3}],48:[function(require,module,exports){
+module.exports={
+  "secp128r1": {
+    "p": "fffffffdffffffffffffffffffffffff",
+    "a": "fffffffdfffffffffffffffffffffffc",
+    "b": "e87579c11079f43dd824993c2cee5ed3",
+    "n": "fffffffe0000000075a30d1b9038a115",
+    "h": "01",
+    "Gx": "161ff7528b899b2d0c28607ca52c5b86",
+    "Gy": "cf5ac8395bafeb13c02da292dded7a83"
+  },
+  "secp160k1": {
+    "p": "fffffffffffffffffffffffffffffffeffffac73",
+    "a": "00",
+    "b": "07",
+    "n": "0100000000000000000001b8fa16dfab9aca16b6b3",
+    "h": "01",
+    "Gx": "3b4c382ce37aa192a4019e763036f4f5dd4d7ebb",
+    "Gy": "938cf935318fdced6bc28286531733c3f03c4fee"
+  },
+  "secp160r1": {
+    "p": "ffffffffffffffffffffffffffffffff7fffffff",
+    "a": "ffffffffffffffffffffffffffffffff7ffffffc",
+    "b": "1c97befc54bd7a8b65acf89f81d4d4adc565fa45",
+    "n": "0100000000000000000001f4c8f927aed3ca752257",
+    "h": "01",
+    "Gx": "4a96b5688ef573284664698968c38bb913cbfc82",
+    "Gy": "23a628553168947d59dcc912042351377ac5fb32"
+  },
+  "secp192k1": {
+    "p": "fffffffffffffffffffffffffffffffffffffffeffffee37",
+    "a": "00",
+    "b": "03",
+    "n": "fffffffffffffffffffffffe26f2fc170f69466a74defd8d",
+    "h": "01",
+    "Gx": "db4ff10ec057e9ae26b07d0280b7f4341da5d1b1eae06c7d",
+    "Gy": "9b2f2f6d9c5628a7844163d015be86344082aa88d95e2f9d"
+  },
+  "secp192r1": {
+    "p": "fffffffffffffffffffffffffffffffeffffffffffffffff",
+    "a": "fffffffffffffffffffffffffffffffefffffffffffffffc",
+    "b": "64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1",
+    "n": "ffffffffffffffffffffffff99def836146bc9b1b4d22831",
+    "h": "01",
+    "Gx": "188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012",
+    "Gy": "07192b95ffc8da78631011ed6b24cdd573f977a11e794811"
+  },
+  "secp256k1": {
+    "p": "fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f",
+    "a": "00",
+    "b": "07",
+    "n": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141",
+    "h": "01",
+    "Gx": "79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798",
+    "Gy": "483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8"
+  },
+  "secp256r1": {
+    "p": "ffffffff00000001000000000000000000000000ffffffffffffffffffffffff",
+    "a": "ffffffff00000001000000000000000000000000fffffffffffffffffffffffc",
+    "b": "5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b",
+    "n": "ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551",
+    "h": "01",
+    "Gx": "6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296",
+    "Gy": "4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5"
+  }
+}
+
+},{}],49:[function(require,module,exports){
+var Point = require('./point')
+var Curve = require('./curve')
+
+var getCurveByName = require('./names')
+
+module.exports = {
+  Curve: Curve,
+  Point: Point,
+  getCurveByName: getCurveByName
+}
+
+},{"./curve":47,"./names":50,"./point":51}],50:[function(require,module,exports){
+var BigInteger = require('bigi')
+
+var curves = require('./curves')
+var Curve = require('./curve')
+
+function getCurveByName(name) {
+  var curve = curves[name]
+  if (!curve) return null
+
+  var p = new BigInteger(curve.p, 16)
+  var a = new BigInteger(curve.a, 16)
+  var b = new BigInteger(curve.b, 16)
+  var n = new BigInteger(curve.n, 16)
+  var h = new BigInteger(curve.h, 16)
+  var Gx = new BigInteger(curve.Gx, 16)
+  var Gy = new BigInteger(curve.Gy, 16)
+
+  return new Curve(p, a, b, Gx, Gy, n, h)
+}
+
+module.exports = getCurveByName
+
+},{"./curve":47,"./curves":48,"bigi":3}],51:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var BigInteger = require('bigi')
+
+var THREE = BigInteger.valueOf(3)
+
+function Point(curve, x, y, z) {
+  assert.notStrictEqual(z, undefined, 'Missing Z coordinate')
+
+  this.curve = curve
+  this.x = x
+  this.y = y
+  this.z = z
+  this._zInv = null
+
+  this.compressed = true
+}
+
+Object.defineProperty(Point.prototype, 'zInv', {
+  get: function() {
+    if (this._zInv === null) {
+      this._zInv = this.z.modInverse(this.curve.p)
+    }
+
+    return this._zInv
+  }
+})
+
+Object.defineProperty(Point.prototype, 'affineX', {
+  get: function() {
+    return this.x.multiply(this.zInv).mod(this.curve.p)
+  }
+})
+
+Object.defineProperty(Point.prototype, 'affineY', {
+  get: function() {
+    return this.y.multiply(this.zInv).mod(this.curve.p)
+  }
+})
+
+Point.fromAffine = function(curve, x, y) {
+  return new Point(curve, x, y, BigInteger.ONE)
+}
+
+Point.prototype.equals = function(other) {
+  if (other === this) return true
+  if (this.curve.isInfinity(this)) return this.curve.isInfinity(other)
+  if (this.curve.isInfinity(other)) return this.curve.isInfinity(this)
+
+  // u = Y2 * Z1 - Y1 * Z2
+  var u = other.y.multiply(this.z).subtract(this.y.multiply(other.z)).mod(this.curve.p)
+
+  if (u.signum() !== 0) return false
+
+  // v = X2 * Z1 - X1 * Z2
+  var v = other.x.multiply(this.z).subtract(this.x.multiply(other.z)).mod(this.curve.p)
+
+  return v.signum() === 0
+}
+
+Point.prototype.negate = function() {
+  var y = this.curve.p.subtract(this.y)
+
+  return new Point(this.curve, this.x, y, this.z)
+}
+
+Point.prototype.add = function(b) {
+  if (this.curve.isInfinity(this)) return b
+  if (this.curve.isInfinity(b)) return this
+
+  var x1 = this.x
+  var y1 = this.y
+  var x2 = b.x
+  var y2 = b.y
+
+  // u = Y2 * Z1 - Y1 * Z2
+  var u = y2.multiply(this.z).subtract(y1.multiply(b.z)).mod(this.curve.p)
+  // v = X2 * Z1 - X1 * Z2
+  var v = x2.multiply(this.z).subtract(x1.multiply(b.z)).mod(this.curve.p)
+
+  if (v.signum() === 0) {
+    if (u.signum() === 0) {
+      return this.twice() // this == b, so double
+    }
+
+    return this.curve.infinity // this = -b, so infinity
+  }
+
+  var v2 = v.square()
+  var v3 = v2.multiply(v)
+  var x1v2 = x1.multiply(v2)
+  var zu2 = u.square().multiply(this.z)
+
+  // x3 = v * (z2 * (z1 * u^2 - 2 * x1 * v^2) - v^3)
+  var x3 = zu2.subtract(x1v2.shiftLeft(1)).multiply(b.z).subtract(v3).multiply(v).mod(this.curve.p)
+  // y3 = z2 * (3 * x1 * u * v^2 - y1 * v^3 - z1 * u^3) + u * v^3
+  var y3 = x1v2.multiply(THREE).multiply(u).subtract(y1.multiply(v3)).subtract(zu2.multiply(u)).multiply(b.z).add(u.multiply(v3)).mod(this.curve.p)
+  // z3 = v^3 * z1 * z2
+  var z3 = v3.multiply(this.z).multiply(b.z).mod(this.curve.p)
+
+  return new Point(this.curve, x3, y3, z3)
+}
+
+Point.prototype.twice = function() {
+  if (this.curve.isInfinity(this)) return this
+  if (this.y.signum() === 0) return this.curve.infinity
+
+  var x1 = this.x
+  var y1 = this.y
+
+  var y1z1 = y1.multiply(this.z)
+  var y1sqz1 = y1z1.multiply(y1).mod(this.curve.p)
+  var a = this.curve.a
+
+  // w = 3 * x1^2 + a * z1^2
+  var w = x1.square().multiply(THREE)
+
+  if (a.signum() !== 0) {
+    w = w.add(this.z.square().multiply(a))
+  }
+
+  w = w.mod(this.curve.p)
+  // x3 = 2 * y1 * z1 * (w^2 - 8 * x1 * y1^2 * z1)
+  var x3 = w.square().subtract(x1.shiftLeft(3).multiply(y1sqz1)).shiftLeft(1).multiply(y1z1).mod(this.curve.p)
+  // y3 = 4 * y1^2 * z1 * (3 * w * x1 - 2 * y1^2 * z1) - w^3
+  var y3 = w.multiply(THREE).multiply(x1).subtract(y1sqz1.shiftLeft(1)).shiftLeft(2).multiply(y1sqz1).subtract(w.pow(3)).mod(this.curve.p)
+  // z3 = 8 * (y1 * z1)^3
+  var z3 = y1z1.pow(3).shiftLeft(3).mod(this.curve.p)
+
+  return new Point(this.curve, x3, y3, z3)
+}
+
+// Simple NAF (Non-Adjacent Form) multiplication algorithm
+// TODO: modularize the multiplication algorithm
+Point.prototype.multiply = function(k) {
+  if (this.curve.isInfinity(this)) return this
+  if (k.signum() === 0) return this.curve.infinity
+
+  var e = k
+  var h = e.multiply(THREE)
+
+  var neg = this.negate()
+  var R = this
+
+  for (var i = h.bitLength() - 2; i > 0; --i) {
+    R = R.twice()
+
+    var hBit = h.testBit(i)
+    var eBit = e.testBit(i)
+
+    if (hBit != eBit) {
+      R = R.add(hBit ? this : neg)
+    }
+  }
+
+  return R
+}
+
+// Compute this*j + x*k (simultaneous multiplication)
+Point.prototype.multiplyTwo = function(j, x, k) {
+  var i
+
+  if (j.bitLength() > k.bitLength())
+    i = j.bitLength() - 1
+  else
+    i = k.bitLength() - 1
+
+  var R = this.curve.infinity
+  var both = this.add(x)
+
+  while (i >= 0) {
+    R = R.twice()
+
+    var jBit = j.testBit(i)
+    var kBit = k.testBit(i)
+
+    if (jBit) {
+      if (kBit) {
+        R = R.add(both)
+
+      } else {
+        R = R.add(this)
+      }
+
+    } else {
+      if (kBit) {
+        R = R.add(x)
+      }
+    }
+    --i
+  }
+
+  return R
+}
+
+Point.prototype.getEncoded = function(compressed) {
+  if (compressed == undefined) compressed = this.compressed
+  if (this.curve.isInfinity(this)) return new Buffer('00', 'hex') // Infinity point encoded is simply '00'
+
+  var x = this.affineX
+  var y = this.affineY
+
+  var buffer
+
+  // Determine size of q in bytes
+  var byteLength = Math.floor((this.curve.p.bitLength() + 7) / 8)
+
+  // 0x02/0x03 | X
+  if (compressed) {
+    buffer = new Buffer(1 + byteLength)
+    buffer.writeUInt8(y.isEven() ? 0x02 : 0x03, 0)
+
+  // 0x04 | X | Y
+  } else {
+    buffer = new Buffer(1 + byteLength + byteLength)
+    buffer.writeUInt8(0x04, 0)
+
+    y.toBuffer(byteLength).copy(buffer, 1 + byteLength)
+  }
+
+  x.toBuffer(byteLength).copy(buffer, 1)
+
+  return buffer
+}
+
+Point.decodeFrom = function(curve, buffer) {
+  var type = buffer.readUInt8(0)
+  var compressed = (type !== 4)
+
+  var byteLength = Math.floor((curve.p.bitLength() + 7) / 8)
+  var x = BigInteger.fromBuffer(buffer.slice(1, 1 + byteLength))
+
+  var Q
+  if (compressed) {
+    assert.equal(buffer.length, byteLength + 1, 'Invalid sequence length')
+    assert(type === 0x02 || type === 0x03, 'Invalid sequence tag')
+
+    var isOdd = (type === 0x03)
+    Q = curve.pointFromX(isOdd, x)
+
+  } else {
+    assert.equal(buffer.length, 1 + byteLength + byteLength, 'Invalid sequence length')
+
+    var y = BigInteger.fromBuffer(buffer.slice(1 + byteLength))
+    Q = Point.fromAffine(curve, x, y)
+  }
+
+  Q.compressed = compressed
+  return Q
+}
+
+Point.prototype.toString = function () {
+  if (this.curve.isInfinity(this)) return '(INFINITY)'
+
+  return '(' + this.affineX.toString() + ',' + this.affineY.toString() + ')'
+}
+
+module.exports = Point
+
+}).call(this,require("buffer").Buffer)
+},{"assert":5,"bigi":3,"buffer":7}],52:[function(require,module,exports){
+(function (process,global,Buffer){
+'use strict';
+
+var crypto = global.crypto || global.msCrypto
+if(crypto && crypto.getRandomValues) {
+  module.exports = randomBytes;
+} else {
+  module.exports = oldBrowser;
+}
+function randomBytes(size, cb) {
+  var bytes = new Buffer(size); //in browserify, this is an extended Uint8Array
+    /* This will not work in older browsers.
+     * See https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues
+     */
+
+  crypto.getRandomValues(bytes);
+  if (typeof cb === 'function') {
+    return process.nextTick(function () {
+      cb(null, bytes);
+    });
+  }
+  return bytes;
+}
+function oldBrowser() {
+  throw new Error(
+      'secure random number generation not supported by this browser\n'+
+      'use chrome, FireFox or Internet Explorer 11'
+    )
+}
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
+},{"_process":14,"buffer":7}],53:[function(require,module,exports){
+(function (Buffer){
+'use strict';
+
+function getFunctionName(fn) {
+  return fn.name || fn.toString().match(/function (.*?)\s*\(/)[1];
+}
+
+function getTypeTypeName(type) {
+  if (nativeTypes.Function(type)) {
+    type = type.toJSON ? type.toJSON() : getFunctionName(type);
+  }
+  if (nativeTypes.Object(type)) return JSON.stringify(type);
+
+  return type;
+}
+
+function getValueTypeName(value) {
+  if (nativeTypes.Null(value)) return '';
+
+  return getFunctionName(value.constructor);
+}
+
+function tfErrorString(type, value) {
+  var typeTypeName = getTypeTypeName(type);
+  var valueTypeName = getValueTypeName(value);
+
+  return 'Expected ' + typeTypeName + ', got ' + (valueTypeName && valueTypeName + ' ') + JSON.stringify(value);
+}
+
+function tfPropertyErrorString(type, name, value) {
+  return tfErrorString('property \"' + name + '\" of type ' + getTypeTypeName(type), value);
+}
+
+var nativeTypes = {
+  Array: (function (_Array) {
+    function Array(_x) {
+      return _Array.apply(this, arguments);
+    }
+
+    Array.toString = function () {
+      return _Array.toString();
+    };
+
+    return Array;
+  })(function (value) {
+    return value !== null && value !== undefined && value.constructor === Array;
+  }),
+  Boolean: function Boolean(value) {
+    return typeof value === 'boolean';
+  },
+  Buffer: (function (_Buffer) {
+    function Buffer(_x2) {
+      return _Buffer.apply(this, arguments);
+    }
+
+    Buffer.toString = function () {
+      return _Buffer.toString();
+    };
+
+    return Buffer;
+  })(function (value) {
+    return Buffer.isBuffer(value);
+  }),
+  Function: function Function(value) {
+    return typeof value === 'function';
+  },
+  Null: function Null(value) {
+    return value === undefined || value === null;
+  },
+  Number: function Number(value) {
+    return typeof value === 'number';
+  },
+  Object: function Object(value) {
+    return typeof value === 'object';
+  },
+  String: function String(value) {
+    return typeof value === 'string';
+  },
+  '': function _() {
+    return true;
+  }
+};
+
+function tJSON(type) {
+  return type && type.toJSON ? type.toJSON() : type;
+}
+
+function sJSON(type) {
+  var json = tJSON(type);
+  return nativeTypes.Object(json) ? JSON.stringify(json) : json;
+}
+
+var otherTypes = {
+  arrayOf: function arrayOf(type) {
+    function arrayOf(value, strict) {
+      try {
+        return nativeTypes.Array(value) && value.every(function (x) {
+          return typeforce(type, x, strict);
+        });
+      } catch (e) {
+        return false;
+      }
+    }
+    arrayOf.toJSON = function () {
+      return [tJSON(type)];
+    };
+
+    return arrayOf;
+  },
+
+  maybe: function maybe(type) {
+    function maybe(value, strict) {
+      return nativeTypes.Null(value) || typeforce(type, value, strict);
+    }
+    maybe.toJSON = function () {
+      return '?' + sJSON(type);
+    };
+
+    return maybe;
+  },
+
+  object: function object(type) {
+    function object(value, strict) {
+      typeforce(nativeTypes.Object, value, strict);
+
+      var propertyName, propertyType, propertyValue;
+
+      try {
+        for (propertyName in type) {
+          propertyType = type[propertyName];
+          propertyValue = value[propertyName];
+
+          typeforce(propertyType, propertyValue, strict);
+        }
+      } catch (e) {
+        throw new TypeError(tfPropertyErrorString(propertyType, propertyName, propertyValue));
+      }
+
+      if (strict) {
+        for (propertyName in value) {
+          if (type[propertyName]) continue;
+
+          throw new TypeError('Unexpected property "' + propertyName + '"');
+        }
+      }
+
+      return true;
+    }
+    object.toJSON = function () {
+      return type;
+    };
+
+    return object;
+  },
+
+  oneOf: function oneOf() {
+    for (var _len = arguments.length, types = Array(_len), _key = 0; _key < _len; _key++) {
+      types[_key] = arguments[_key];
+    }
+
+    function oneOf(value, strict) {
+      return types.some(function (type) {
+        try {
+          return typeforce(type, value, strict);
+        } catch (e) {
+          return false;
+        }
+      });
+    }
+    oneOf.toJSON = function () {
+      return types.map(sJSON).join('|');
+    };
+
+    return oneOf;
+  },
+
+  quacksLike: function quacksLike(type) {
+    function quacksLike(value, strict) {
+      return type === getValueTypeName(value);
+    }
+    quacksLike.toJSON = function () {
+      return type;
+    };
+
+    return quacksLike;
+  },
+
+  tuple: function tuple() {
+    for (var _len2 = arguments.length, types = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+      types[_key2] = arguments[_key2];
+    }
+
+    function tuple(value, strict) {
+      return types.every(function (type, i) {
+        return typeforce(type, value[i], strict);
+      });
+    }
+    tuple.toJSON = function () {
+      return '(' + types.map(sJSON).join(', ') + ')';
+    };
+
+    return tuple;
+  },
+
+  value: function value(expected) {
+    function value(actual) {
+      return actual === expected;
+    }
+    value.toJSON = function () {
+      return expected;
+    };
+
+    return value;
+  }
+};
+
+function compile(type) {
+  if (nativeTypes.String(type)) {
+    if (type[0] === '?') return otherTypes.maybe(compile(type.slice(1)));
+
+    return nativeTypes[type] || otherTypes.quacksLike(type);
+  } else if (type && nativeTypes.Object(type)) {
+    if (nativeTypes.Array(type)) return otherTypes.arrayOf(compile(type[0]));
+
+    var compiled = {};
+
+    for (var propertyName in type) {
+      compiled[propertyName] = compile(type[propertyName]);
+    }
+
+    return otherTypes.object(compiled);
+  } else if (nativeTypes.Function(type)) {
+    return type;
+  }
+
+  return otherTypes.value(type);
+}
+
+function typeforce(_x3, _x4, _x5) {
+  var _again = true;
+
+  _function: while (_again) {
+    var type = _x3,
+        value = _x4,
+        strict = _x5;
+    _again = false;
+
+    if (nativeTypes.Function(type)) {
+      if (type(value, strict)) return true;
+
+      throw new TypeError(tfErrorString(type, value));
+    }
+
+    // JIT
+    _x3 = compile(type);
+    _x4 = value;
+    _x5 = strict;
+    _again = true;
+    continue _function;
+  }
+}
+
+// assign all types to typeforce function
+var typeName;
+Object.keys(nativeTypes).forEach(function (typeName) {
+  var nativeType = nativeTypes[typeName];
+  nativeType.toJSON = function () {
+    return typeName;
+  };
+
+  typeforce[typeName] = nativeType;
+});
+
+for (typeName in otherTypes) {
+  typeforce[typeName] = otherTypes[typeName];
+}
+
+module.exports = typeforce;
+module.exports.compile = compile;
+}).call(this,require("buffer").Buffer)
+},{"buffer":7}],54:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var base58check = require('bs58check')
+var typeForce = require('typeforce')
+var networks = require('./networks')
+var scripts = require('./scripts')
+
+function findScriptTypeByVersion (version) {
+  for (var networkName in networks) {
+    var network = networks[networkName]
+
+    if (version === network.pubKeyHash) return 'pubkeyhash'
+    if (version === network.scriptHash) return 'scripthash'
+  }
+}
+
+function Address (hash, version) {
+  typeForce('Buffer', hash)
+
+  assert.strictEqual(hash.length, 20, 'Invalid hash length')
+  assert.strictEqual(version & 0xff, version, 'Invalid version byte')
+
+  this.hash = hash
+  this.version = version
+}
+
+Address.fromBase58Check = function (string) {
+  var payload = base58check.decode(string)
+  var version = payload.readUInt8(0)
+  var hash = payload.slice(1)
+
+  return new Address(hash, version)
+}
+
+Address.fromOutputScript = function (script, network) {
+  network = network || networks.bitcoin
+
+  if (scripts.isPubKeyHashOutput(script)) return new Address(script.chunks[2], network.pubKeyHash)
+  if (scripts.isScriptHashOutput(script)) return new Address(script.chunks[1], network.scriptHash)
+
+  assert(false, script.toASM() + ' has no matching Address')
+}
+
+Address.prototype.toBase58Check = function () {
+  var payload = new Buffer(21)
+  payload.writeUInt8(this.version, 0)
+  this.hash.copy(payload, 1)
+
+  return base58check.encode(payload)
+}
+
+Address.prototype.toOutputScript = function () {
+  var scriptType = findScriptTypeByVersion(this.version)
+
+  if (scriptType === 'pubkeyhash') return scripts.pubKeyHashOutput(this.hash)
+  if (scriptType === 'scripthash') return scripts.scriptHashOutput(this.hash)
+
+  assert(false, this.toString() + ' has no matching Script')
+}
+
+Address.prototype.toString = Address.prototype.toBase58Check
+
+module.exports = Address
+
+}).call(this,require("buffer").Buffer)
+},{"./networks":66,"./scripts":69,"assert":5,"bs58check":31,"buffer":7,"typeforce":53}],55:[function(require,module,exports){
+var bs58check = require('bs58check')
+
+function decode () {
+  console.warn('bs58check will be removed in 2.0.0. require("bs58check") instead.')
+
+  return bs58check.decode.apply(undefined, arguments)
+}
+
+function encode () {
+  console.warn('bs58check will be removed in 2.0.0. require("bs58check") instead.')
+
+  return bs58check.encode.apply(undefined, arguments)
+}
+
+module.exports = {
+  decode: decode,
+  encode: encode
+}
+
+},{"bs58check":31}],56:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var bufferutils = require('./bufferutils')
+var crypto = require('./crypto')
+
+var Transaction = require('./transaction')
+
+function Block () {
+  this.version = 1
+  this.prevHash = null
+  this.merkleRoot = null
+  this.timestamp = 0
+  this.bits = 0
+  this.nonce = 0
+}
+
+Block.fromBuffer = function (buffer) {
+  assert(buffer.length >= 80, 'Buffer too small (< 80 bytes)')
+
+  var offset = 0
+  function readSlice (n) {
+    offset += n
+    return buffer.slice(offset - n, offset)
+  }
+
+  function readUInt32 () {
+    var i = buffer.readUInt32LE(offset)
+    offset += 4
+    return i
+  }
+
+  var block = new Block()
+  block.version = readUInt32()
+  block.prevHash = readSlice(32)
+  block.merkleRoot = readSlice(32)
+  block.timestamp = readUInt32()
+  block.bits = readUInt32()
+  block.nonce = readUInt32()
+
+  if (buffer.length === 80) return block
+
+  function readVarInt () {
+    var vi = bufferutils.readVarInt(buffer, offset)
+    offset += vi.size
+    return vi.number
+  }
+
+  // FIXME: poor performance
+  function readTransaction () {
+    var tx = Transaction.fromBuffer(buffer.slice(offset), true)
+
+    offset += tx.toBuffer().length
+    return tx
+  }
+
+  var nTransactions = readVarInt()
+  block.transactions = []
+
+  for (var i = 0; i < nTransactions; ++i) {
+    var tx = readTransaction()
+    block.transactions.push(tx)
+  }
+
+  return block
+}
+
+Block.fromHex = function (hex) {
+  return Block.fromBuffer(new Buffer(hex, 'hex'))
+}
+
+Block.prototype.getHash = function () {
+  return crypto.hash256(this.toBuffer(true))
+}
+
+Block.prototype.getId = function () {
+  return bufferutils.reverse(this.getHash()).toString('hex')
+}
+
+Block.prototype.getUTCDate = function () {
+  var date = new Date(0) // epoch
+  date.setUTCSeconds(this.timestamp)
+
+  return date
+}
+
+Block.prototype.toBuffer = function (headersOnly) {
+  var buffer = new Buffer(80)
+
+  var offset = 0
+  function writeSlice (slice) {
+    slice.copy(buffer, offset)
+    offset += slice.length
+  }
+
+  function writeUInt32 (i) {
+    buffer.writeUInt32LE(i, offset)
+    offset += 4
+  }
+
+  writeUInt32(this.version)
+  writeSlice(this.prevHash)
+  writeSlice(this.merkleRoot)
+  writeUInt32(this.timestamp)
+  writeUInt32(this.bits)
+  writeUInt32(this.nonce)
+
+  if (headersOnly || !this.transactions) return buffer
+
+  var txLenBuffer = bufferutils.varIntBuffer(this.transactions.length)
+  var txBuffers = this.transactions.map(function (tx) {
+    return tx.toBuffer()
+  })
+
+  return Buffer.concat([buffer, txLenBuffer].concat(txBuffers))
+}
+
+Block.prototype.toHex = function (headersOnly) {
+  return this.toBuffer(headersOnly).toString('hex')
+}
+
+module.exports = Block
+
+}).call(this,require("buffer").Buffer)
+},{"./bufferutils":57,"./crypto":58,"./transaction":70,"assert":5,"buffer":7}],57:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var opcodes = require('./opcodes')
+
+// https://github.com/feross/buffer/blob/master/index.js#L1127
+function verifuint (value, max) {
+  assert(typeof value === 'number', 'cannot write a non-number as a number')
+  assert(value >= 0, 'specified a negative value for writing an unsigned value')
+  assert(value <= max, 'value is larger than maximum value for type')
+  assert(Math.floor(value) === value, 'value has a fractional component')
+}
+
+function pushDataSize (i) {
+  return i < opcodes.OP_PUSHDATA1 ? 1
+  : i < 0xff ? 2
+  : i < 0xffff ? 3
+  : 5
+}
+
+function readPushDataInt (buffer, offset) {
+  var opcode = buffer.readUInt8(offset)
+  var number, size
+
+  // ~6 bit
+  if (opcode < opcodes.OP_PUSHDATA1) {
+    number = opcode
+    size = 1
+
+  // 8 bit
+  } else if (opcode === opcodes.OP_PUSHDATA1) {
+    if (offset + 2 > buffer.length) return null
+    number = buffer.readUInt8(offset + 1)
+    size = 2
+
+  // 16 bit
+  } else if (opcode === opcodes.OP_PUSHDATA2) {
+    if (offset + 3 > buffer.length) return null
+    number = buffer.readUInt16LE(offset + 1)
+    size = 3
+
+  // 32 bit
+  } else {
+    if (offset + 5 > buffer.length) return null
+    assert.equal(opcode, opcodes.OP_PUSHDATA4, 'Unexpected opcode')
+
+    number = buffer.readUInt32LE(offset + 1)
+    size = 5
+  }
+
+  return {
+    opcode: opcode,
+    number: number,
+    size: size
+  }
+}
+
+function readUInt64LE (buffer, offset) {
+  var a = buffer.readUInt32LE(offset)
+  var b = buffer.readUInt32LE(offset + 4)
+  b *= 0x100000000
+
+  verifuint(b + a, 0x001fffffffffffff)
+
+  return b + a
+}
+
+function readVarInt (buffer, offset) {
+  var t = buffer.readUInt8(offset)
+  var number, size
+
+  // 8 bit
+  if (t < 253) {
+    number = t
+    size = 1
+
+  // 16 bit
+  } else if (t < 254) {
+    number = buffer.readUInt16LE(offset + 1)
+    size = 3
+
+  // 32 bit
+  } else if (t < 255) {
+    number = buffer.readUInt32LE(offset + 1)
+    size = 5
+
+  // 64 bit
+  } else {
+    number = readUInt64LE(buffer, offset + 1)
+    size = 9
+  }
+
+  return {
+    number: number,
+    size: size
+  }
+}
+
+function writePushDataInt (buffer, number, offset) {
+  var size = pushDataSize(number)
+
+  // ~6 bit
+  if (size === 1) {
+    buffer.writeUInt8(number, offset)
+
+  // 8 bit
+  } else if (size === 2) {
+    buffer.writeUInt8(opcodes.OP_PUSHDATA1, offset)
+    buffer.writeUInt8(number, offset + 1)
+
+  // 16 bit
+  } else if (size === 3) {
+    buffer.writeUInt8(opcodes.OP_PUSHDATA2, offset)
+    buffer.writeUInt16LE(number, offset + 1)
+
+  // 32 bit
+  } else {
+    buffer.writeUInt8(opcodes.OP_PUSHDATA4, offset)
+    buffer.writeUInt32LE(number, offset + 1)
+  }
+
+  return size
+}
+
+function writeUInt64LE (buffer, value, offset) {
+  verifuint(value, 0x001fffffffffffff)
+
+  buffer.writeInt32LE(value & -1, offset)
+  buffer.writeUInt32LE(Math.floor(value / 0x100000000), offset + 4)
+}
+
+function varIntSize (i) {
+  return i < 253 ? 1
+  : i < 0x10000 ? 3
+  : i < 0x100000000 ? 5
+  : 9
+}
+
+function writeVarInt (buffer, number, offset) {
+  var size = varIntSize(number)
+
+  // 8 bit
+  if (size === 1) {
+    buffer.writeUInt8(number, offset)
+
+  // 16 bit
+  } else if (size === 3) {
+    buffer.writeUInt8(253, offset)
+    buffer.writeUInt16LE(number, offset + 1)
+
+  // 32 bit
+  } else if (size === 5) {
+    buffer.writeUInt8(254, offset)
+    buffer.writeUInt32LE(number, offset + 1)
+
+  // 64 bit
+  } else {
+    buffer.writeUInt8(255, offset)
+    writeUInt64LE(buffer, number, offset + 1)
+  }
+
+  return size
+}
+
+function varIntBuffer (i) {
+  var size = varIntSize(i)
+  var buffer = new Buffer(size)
+  writeVarInt(buffer, i, 0)
+
+  return buffer
+}
+
+function reverse (buffer) {
+  var buffer2 = new Buffer(buffer)
+  Array.prototype.reverse.call(buffer2)
+  return buffer2
+}
+
+module.exports = {
+  pushDataSize: pushDataSize,
+  readPushDataInt: readPushDataInt,
+  readUInt64LE: readUInt64LE,
+  readVarInt: readVarInt,
+  reverse: reverse,
+  varIntBuffer: varIntBuffer,
+  varIntSize: varIntSize,
+  writePushDataInt: writePushDataInt,
+  writeUInt64LE: writeUInt64LE,
+  writeVarInt: writeVarInt
+}
+
+}).call(this,require("buffer").Buffer)
+},{"./opcodes":67,"assert":5,"buffer":7}],58:[function(require,module,exports){
+var createHash = require('create-hash')
+
+function hash160 (buffer) {
+  return ripemd160(sha256(buffer))
+}
+
+function hash256 (buffer) {
+  return sha256(sha256(buffer))
+}
+
+function ripemd160 (buffer) {
+  return createHash('rmd160').update(buffer).digest()
+}
+
+function sha1 (buffer) {
+  return createHash('sha1').update(buffer).digest()
+}
+
+function sha256 (buffer) {
+  return createHash('sha256').update(buffer).digest()
+}
+
+// FIXME: Name not consistent with others
+var createHmac = require('create-hmac')
+
+function HmacSHA256 (buffer, secret) {
+  console.warn('Hmac* functions are deprecated for removal in 2.0.0, use node crypto instead')
+  return createHmac('sha256', secret).update(buffer).digest()
+}
+
+function HmacSHA512 (buffer, secret) {
+  console.warn('Hmac* functions are deprecated for removal in 2.0.0, use node crypto instead')
+  return createHmac('sha512', secret).update(buffer).digest()
+}
+
+module.exports = {
+  ripemd160: ripemd160,
+  sha1: sha1,
+  sha256: sha256,
+  hash160: hash160,
+  hash256: hash256,
+  HmacSHA256: HmacSHA256,
+  HmacSHA512: HmacSHA512
+}
+
+},{"create-hash":32,"create-hmac":45}],59:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var createHmac = require('create-hmac')
+var typeForce = require('typeforce')
+
+var BigInteger = require('bigi')
+var ECSignature = require('./ecsignature')
+
+var ZERO = new Buffer([0])
+var ONE = new Buffer([1])
+
+// https://tools.ietf.org/html/rfc6979#section-3.2
+function deterministicGenerateK (curve, hash, d, checkSig) {
+  typeForce('Buffer', hash)
+  typeForce('BigInteger', d)
+
+  // FIXME: remove/uncomment for 2.0.0
+  //  typeForce('Function', checkSig)
+
+  if (typeof checkSig !== 'function') {
+    console.warn('deterministicGenerateK requires a checkSig callback in 2.0.0, see #337 for more information')
+
+    checkSig = function (k) {
+      var G = curve.G
+      var n = curve.n
+      var e = BigInteger.fromBuffer(hash)
+
+      var Q = G.multiply(k)
+
+      if (curve.isInfinity(Q))
+        return false
+
+      var r = Q.affineX.mod(n)
+      if (r.signum() === 0)
+        return false
+
+      var s = k.modInverse(n).multiply(e.add(d.multiply(r))).mod(n)
+      if (s.signum() === 0)
+        return false
+
+      return true
+    }
+  }
+
+  // sanity check
+  assert.equal(hash.length, 32, 'Hash must be 256 bit')
+
+  var x = d.toBuffer(32)
+  var k = new Buffer(32)
+  var v = new Buffer(32)
+
+  // Step A, ignored as hash already provided
+  // Step B
+  v.fill(1)
+
+  // Step C
+  k.fill(0)
+
+  // Step D
+  k = createHmac('sha256', k)
+    .update(v)
+    .update(ZERO)
+    .update(x)
+    .update(hash)
+    .digest()
+
+  // Step E
+  v = createHmac('sha256', k).update(v).digest()
+
+  // Step F
+  k = createHmac('sha256', k)
+    .update(v)
+    .update(ONE)
+    .update(x)
+    .update(hash)
+    .digest()
+
+  // Step G
+  v = createHmac('sha256', k).update(v).digest()
+
+  // Step H1/H2a, ignored as tlen === qlen (256 bit)
+  // Step H2b
+  v = createHmac('sha256', k).update(v).digest()
+
+  var T = BigInteger.fromBuffer(v)
+
+  // Step H3, repeat until T is within the interval [1, n - 1] and is suitable for ECDSA
+  while ((T.signum() <= 0) || (T.compareTo(curve.n) >= 0) || !checkSig(T)) {
+    k = createHmac('sha256', k)
+      .update(v)
+      .update(ZERO)
+      .digest()
+
+    v = createHmac('sha256', k).update(v).digest()
+
+    // Step H1/H2a, again, ignored as tlen === qlen (256 bit)
+    // Step H2b again
+    v = createHmac('sha256', k).update(v).digest()
+    T = BigInteger.fromBuffer(v)
+  }
+
+  return T
+}
+
+function sign (curve, hash, d) {
+  var r, s
+
+  var e = BigInteger.fromBuffer(hash)
+  var n = curve.n
+  var G = curve.G
+
+  deterministicGenerateK(curve, hash, d, function (k) {
+    var Q = G.multiply(k)
+
+    if (curve.isInfinity(Q))
+      return false
+
+    r = Q.affineX.mod(n)
+    if (r.signum() === 0)
+      return false
+
+    s = k.modInverse(n).multiply(e.add(d.multiply(r))).mod(n)
+    if (s.signum() === 0)
+      return false
+
+    return true
+  })
+
+  var N_OVER_TWO = n.shiftRight(1)
+
+  // enforce low S values, see bip62: 'low s values in signatures'
+  if (s.compareTo(N_OVER_TWO) > 0) {
+    s = n.subtract(s)
+  }
+
+  return new ECSignature(r, s)
+}
+
+function verifyRaw (curve, e, signature, Q) {
+  var n = curve.n
+  var G = curve.G
+
+  var r = signature.r
+  var s = signature.s
+
+  // 1.4.1 Enforce r and s are both integers in the interval [1, n − 1]
+  if (r.signum() <= 0 || r.compareTo(n) >= 0) return false
+  if (s.signum() <= 0 || s.compareTo(n) >= 0) return false
+
+  // c = s^-1 mod n
+  var c = s.modInverse(n)
+
+  // 1.4.4 Compute u1 = es^−1 mod n
+  //               u2 = rs^−1 mod n
+  var u1 = e.multiply(c).mod(n)
+  var u2 = r.multiply(c).mod(n)
+
+  // 1.4.5 Compute R = (xR, yR) = u1G + u2Q
+  var R = G.multiplyTwo(u1, Q, u2)
+  var v = R.affineX.mod(n)
+
+  // 1.4.5 (cont.) Enforce R is not at infinity
+  if (curve.isInfinity(R)) return false
+
+  // 1.4.8 If v = r, output "valid", and if v != r, output "invalid"
+  return v.equals(r)
+}
+
+function verify (curve, hash, signature, Q) {
+  // 1.4.2 H = Hash(M), already done by the user
+  // 1.4.3 e = H
+  var e = BigInteger.fromBuffer(hash)
+
+  return verifyRaw(curve, e, signature, Q)
+}
+
+/**
+  * Recover a public key from a signature.
+  *
+  * See SEC 1: Elliptic Curve Cryptography, section 4.1.6, "Public
+  * Key Recovery Operation".
+  *
+  * http://www.secg.org/download/aid-780/sec1-v2.pdf
+  */
+function recoverPubKey (curve, e, signature, i) {
+  assert.strictEqual(i & 3, i, 'Recovery param is more than two bits')
+
+  var n = curve.n
+  var G = curve.G
+
+  var r = signature.r
+  var s = signature.s
+
+  assert(r.signum() > 0 && r.compareTo(n) < 0, 'Invalid r value')
+  assert(s.signum() > 0 && s.compareTo(n) < 0, 'Invalid s value')
+
+  // A set LSB signifies that the y-coordinate is odd
+  var isYOdd = i & 1
+
+  // The more significant bit specifies whether we should use the
+  // first or second candidate key.
+  var isSecondKey = i >> 1
+
+  // 1.1 Let x = r + jn
+  var x = isSecondKey ? r.add(n) : r
+  var R = curve.pointFromX(isYOdd, x)
+
+  // 1.4 Check that nR is at infinity
+  var nR = R.multiply(n)
+  assert(curve.isInfinity(nR), 'nR is not a valid curve point')
+
+  // Compute -e from e
+  var eNeg = e.negate().mod(n)
+
+  // 1.6.1 Compute Q = r^-1 (sR -  eG)
+  //               Q = r^-1 (sR + -eG)
+  var rInv = r.modInverse(n)
+
+  var Q = R.multiplyTwo(s, G, eNeg).multiply(rInv)
+  curve.validate(Q)
+
+  return Q
+}
+
+/**
+  * Calculate pubkey extraction parameter.
+  *
+  * When extracting a pubkey from a signature, we have to
+  * distinguish four different cases. Rather than putting this
+  * burden on the verifier, Bitcoin includes a 2-bit value with the
+  * signature.
+  *
+  * This function simply tries all four cases and returns the value
+  * that resulted in a successful pubkey recovery.
+  */
+function calcPubKeyRecoveryParam (curve, e, signature, Q) {
+  for (var i = 0; i < 4; i++) {
+    var Qprime = recoverPubKey(curve, e, signature, i)
+
+    // 1.6.2 Verify Q
+    if (Qprime.equals(Q)) {
+      return i
+    }
+  }
+
+  throw new Error('Unable to find valid recovery factor')
+}
+
+module.exports = {
+  calcPubKeyRecoveryParam: calcPubKeyRecoveryParam,
+  deterministicGenerateK: deterministicGenerateK,
+  recoverPubKey: recoverPubKey,
+  sign: sign,
+  verify: verify,
+  verifyRaw: verifyRaw
+}
+
+}).call(this,require("buffer").Buffer)
+},{"./ecsignature":62,"assert":5,"bigi":3,"buffer":7,"create-hmac":45,"typeforce":53}],60:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var base58check = require('bs58check')
+var ecdsa = require('./ecdsa')
+var networks = require('./networks')
+var randomBytes = require('randombytes')
+var typeForce = require('typeforce')
+
+var BigInteger = require('bigi')
+var ECPubKey = require('./ecpubkey')
+
+var ecurve = require('ecurve')
+var secp256k1 = ecurve.getCurveByName('secp256k1')
+
+function ECKey (d, compressed) {
+  assert(d.signum() > 0, 'Private key must be greater than 0')
+  assert(d.compareTo(ECKey.curve.n) < 0, 'Private key must be less than the curve order')
+
+  var Q = ECKey.curve.G.multiply(d)
+
+  this.d = d
+  this.pub = new ECPubKey(Q, compressed)
+}
+
+// Constants
+ECKey.curve = secp256k1
+
+// Static constructors
+ECKey.fromWIF = function (string) {
+  var payload = base58check.decode(string)
+  var compressed = false
+
+  // Ignore the version byte
+  payload = payload.slice(1)
+
+  if (payload.length === 33) {
+    assert.strictEqual(payload[32], 0x01, 'Invalid compression flag')
+
+    // Truncate the compression flag
+    payload = payload.slice(0, -1)
+    compressed = true
+  }
+
+  assert.equal(payload.length, 32, 'Invalid WIF payload length')
+
+  var d = BigInteger.fromBuffer(payload)
+  return new ECKey(d, compressed)
+}
+
+ECKey.makeRandom = function (compressed, rng) {
+  rng = rng || randomBytes
+
+  var buffer = rng(32)
+  typeForce('Buffer', buffer)
+  assert.equal(buffer.length, 32, 'Expected 256-bit Buffer from RNG')
+
+  var d = BigInteger.fromBuffer(buffer)
+  d = d.mod(ECKey.curve.n)
+
+  return new ECKey(d, compressed)
+}
+
+// Export functions
+ECKey.prototype.toWIF = function (network) {
+  network = network || networks.bitcoin
+
+  var bufferLen = this.pub.compressed ? 34 : 33
+  var buffer = new Buffer(bufferLen)
+
+  buffer.writeUInt8(network.wif, 0)
+  this.d.toBuffer(32).copy(buffer, 1)
+
+  if (this.pub.compressed) {
+    buffer.writeUInt8(0x01, 33)
+  }
+
+  return base58check.encode(buffer)
+}
+
+// Operations
+ECKey.prototype.sign = function (hash) {
+  return ecdsa.sign(ECKey.curve, hash, this.d)
+}
+
+module.exports = ECKey
+
+}).call(this,require("buffer").Buffer)
+},{"./ecdsa":59,"./ecpubkey":61,"./networks":66,"assert":5,"bigi":3,"bs58check":31,"buffer":7,"ecurve":49,"randombytes":52,"typeforce":53}],61:[function(require,module,exports){
+(function (Buffer){
+var crypto = require('./crypto')
+var ecdsa = require('./ecdsa')
+var typeForce = require('typeforce')
+var networks = require('./networks')
+
+var Address = require('./address')
+
+var ecurve = require('ecurve')
+var secp256k1 = ecurve.getCurveByName('secp256k1')
+
+function ECPubKey (Q, compressed) {
+  if (compressed === undefined) {
+    compressed = true
+  }
+
+  typeForce('Point', Q)
+  typeForce('Boolean', compressed)
+
+  this.compressed = compressed
+  this.Q = Q
+}
+
+// Constants
+ECPubKey.curve = secp256k1
+
+// Static constructors
+ECPubKey.fromBuffer = function (buffer) {
+  var Q = ecurve.Point.decodeFrom(ECPubKey.curve, buffer)
+  return new ECPubKey(Q, Q.compressed)
+}
+
+ECPubKey.fromHex = function (hex) {
+  return ECPubKey.fromBuffer(new Buffer(hex, 'hex'))
+}
+
+// Operations
+ECPubKey.prototype.getAddress = function (network) {
+  network = network || networks.bitcoin
+
+  return new Address(crypto.hash160(this.toBuffer()), network.pubKeyHash)
+}
+
+ECPubKey.prototype.verify = function (hash, signature) {
+  return ecdsa.verify(ECPubKey.curve, hash, signature, this.Q)
+}
+
+// Export functions
+ECPubKey.prototype.toBuffer = function () {
+  return this.Q.getEncoded(this.compressed)
+}
+
+ECPubKey.prototype.toHex = function () {
+  return this.toBuffer().toString('hex')
+}
+
+module.exports = ECPubKey
+
+}).call(this,require("buffer").Buffer)
+},{"./address":54,"./crypto":58,"./ecdsa":59,"./networks":66,"buffer":7,"ecurve":49,"typeforce":53}],62:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var typeForce = require('typeforce')
+
+var BigInteger = require('bigi')
+
+function ECSignature (r, s) {
+  typeForce('BigInteger', r)
+  typeForce('BigInteger', s)
+
+  this.r = r
+  this.s = s
+}
+
+ECSignature.parseCompact = function (buffer) {
+  assert.equal(buffer.length, 65, 'Invalid signature length')
+  var i = buffer.readUInt8(0) - 27
+
+  // At most 3 bits
+  assert.equal(i, i & 7, 'Invalid signature parameter')
+  var compressed = !!(i & 4)
+
+  // Recovery param only
+  i = i & 3
+
+  var r = BigInteger.fromBuffer(buffer.slice(1, 33))
+  var s = BigInteger.fromBuffer(buffer.slice(33))
+
+  return {
+    compressed: compressed,
+    i: i,
+    signature: new ECSignature(r, s)
+  }
+}
+
+ECSignature.fromDER = function (buffer) {
+  assert.equal(buffer.readUInt8(0), 0x30, 'Not a DER sequence')
+  assert.equal(buffer.readUInt8(1), buffer.length - 2, 'Invalid sequence length')
+  assert.equal(buffer.readUInt8(2), 0x02, 'Expected a DER integer')
+
+  var rLen = buffer.readUInt8(3)
+  assert(rLen > 0, 'R length is zero')
+
+  var offset = 4 + rLen
+  assert.equal(buffer.readUInt8(offset), 0x02, 'Expected a DER integer (2)')
+
+  var sLen = buffer.readUInt8(offset + 1)
+  assert(sLen > 0, 'S length is zero')
+
+  var rB = buffer.slice(4, offset)
+  var sB = buffer.slice(offset + 2)
+  offset += 2 + sLen
+
+  if (rLen > 1 && rB.readUInt8(0) === 0x00) {
+    assert(rB.readUInt8(1) & 0x80, 'R value excessively padded')
+  }
+
+  if (sLen > 1 && sB.readUInt8(0) === 0x00) {
+    assert(sB.readUInt8(1) & 0x80, 'S value excessively padded')
+  }
+
+  assert.equal(offset, buffer.length, 'Invalid DER encoding')
+  var r = BigInteger.fromDERInteger(rB)
+  var s = BigInteger.fromDERInteger(sB)
+
+  assert(r.signum() >= 0, 'R value is negative')
+  assert(s.signum() >= 0, 'S value is negative')
+
+  return new ECSignature(r, s)
+}
+
+// BIP62: 1 byte hashType flag (only 0x01, 0x02, 0x03, 0x81, 0x82 and 0x83 are allowed)
+ECSignature.parseScriptSignature = function (buffer) {
+  var hashType = buffer.readUInt8(buffer.length - 1)
+  var hashTypeMod = hashType & ~0x80
+
+  assert(hashTypeMod > 0x00 && hashTypeMod < 0x04, 'Invalid hashType ' + hashType)
+
+  return {
+    signature: ECSignature.fromDER(buffer.slice(0, -1)),
+    hashType: hashType
+  }
+}
+
+ECSignature.prototype.toCompact = function (i, compressed) {
+  if (compressed) {
+    i += 4
+  }
+
+  i += 27
+
+  var buffer = new Buffer(65)
+  buffer.writeUInt8(i, 0)
+
+  this.r.toBuffer(32).copy(buffer, 1)
+  this.s.toBuffer(32).copy(buffer, 33)
+
+  return buffer
+}
+
+ECSignature.prototype.toDER = function () {
+  var rBa = this.r.toDERInteger()
+  var sBa = this.s.toDERInteger()
+
+  var sequence = []
+
+  // INTEGER
+  sequence.push(0x02, rBa.length)
+  sequence = sequence.concat(rBa)
+
+  // INTEGER
+  sequence.push(0x02, sBa.length)
+  sequence = sequence.concat(sBa)
+
+  // SEQUENCE
+  sequence.unshift(0x30, sequence.length)
+
+  return new Buffer(sequence)
+}
+
+ECSignature.prototype.toScriptSignature = function (hashType) {
+  var hashTypeMod = hashType & ~0x80
+  assert(hashTypeMod > 0x00 && hashTypeMod < 0x04, 'Invalid hashType ' + hashType)
+
+  var hashTypeBuffer = new Buffer(1)
+  hashTypeBuffer.writeUInt8(hashType, 0)
+
+  return Buffer.concat([this.toDER(), hashTypeBuffer])
+}
+
+module.exports = ECSignature
+
+}).call(this,require("buffer").Buffer)
+},{"assert":5,"bigi":3,"buffer":7,"typeforce":53}],63:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var base58check = require('bs58check')
+var bcrypto = require('./crypto')
+var createHmac = require('create-hmac')
+var typeForce = require('typeforce')
+var networks = require('./networks')
+
+var BigInteger = require('bigi')
+var ECKey = require('./eckey')
+var ECPubKey = require('./ecpubkey')
+
+var ecurve = require('ecurve')
+var curve = ecurve.getCurveByName('secp256k1')
+
+function findBIP32NetworkByVersion (version) {
+  for (var name in networks) {
+    var network = networks[name]
+
+    if (version === network.bip32.private || version === network.bip32.public) {
+      return network
+    }
+  }
+
+  assert(false, 'Could not find network for ' + version.toString(16))
+}
+
+function HDNode (K, chainCode, network) {
+  network = network || networks.bitcoin
+
+  typeForce('Buffer', chainCode)
+
+  assert.equal(chainCode.length, 32, 'Expected chainCode length of 32, got ' + chainCode.length)
+  assert(network.bip32, 'Unknown BIP32 constants for network')
+
+  this.chainCode = chainCode
+  this.depth = 0
+  this.index = 0
+  this.parentFingerprint = 0x00000000
+  this.network = network
+
+  if (K instanceof BigInteger) {
+    this.privKey = new ECKey(K, true)
+    this.pubKey = this.privKey.pub
+  } else if (K instanceof ECKey) {
+    assert(K.pub.compressed, 'ECKey must be compressed')
+    this.privKey = K
+    this.pubKey = K.pub
+  } else if (K instanceof ECPubKey) {
+    assert(K.compressed, 'ECPubKey must be compressed')
+    this.pubKey = K
+  } else {
+    this.pubKey = new ECPubKey(K, true)
+  }
+}
+
+HDNode.MASTER_SECRET = new Buffer('Bitcoin seed')
+HDNode.HIGHEST_BIT = 0x80000000
+HDNode.LENGTH = 78
+
+HDNode.fromSeedBuffer = function (seed, network) {
+  typeForce('Buffer', seed)
+
+  assert(seed.length >= 16, 'Seed should be at least 128 bits')
+  assert(seed.length <= 64, 'Seed should be at most 512 bits')
+
+  var I = createHmac('sha512', HDNode.MASTER_SECRET).update(seed).digest()
+  var IL = I.slice(0, 32)
+  var IR = I.slice(32)
+
+  // In case IL is 0 or >= n, the master key is invalid
+  // This is handled by `new ECKey` in the HDNode constructor
+  var pIL = BigInteger.fromBuffer(IL)
+
+  return new HDNode(pIL, IR, network)
+}
+
+HDNode.fromSeedHex = function (hex, network) {
+  return HDNode.fromSeedBuffer(new Buffer(hex, 'hex'), network)
+}
+
+HDNode.fromBase58 = function (string, network) {
+  return HDNode.fromBuffer(base58check.decode(string), network, true)
+}
+
+// FIXME: remove in 2.x.y
+HDNode.fromBuffer = function (buffer, network, __ignoreDeprecation) {
+  if (!__ignoreDeprecation) {
+    console.warn('HDNode.fromBuffer() is deprecated for removal in 2.x.y, use fromBase58 instead')
+  }
+
+  assert.strictEqual(buffer.length, HDNode.LENGTH, 'Invalid buffer length')
+
+  // 4 byte: version bytes
+  var version = buffer.readUInt32BE(0)
+
+  if (network) {
+    assert(version === network.bip32.private || version === network.bip32.public, "Network doesn't match")
+
+  // auto-detect
+  } else {
+    network = findBIP32NetworkByVersion(version)
+  }
+
+  // 1 byte: depth: 0x00 for master nodes, 0x01 for level-1 descendants, ...
+  var depth = buffer.readUInt8(4)
+
+  // 4 bytes: the fingerprint of the parent's key (0x00000000 if master key)
+  var parentFingerprint = buffer.readUInt32BE(5)
+  if (depth === 0) {
+    assert.strictEqual(parentFingerprint, 0x00000000, 'Invalid parent fingerprint')
+  }
+
+  // 4 bytes: child number. This is the number i in xi = xpar/i, with xi the key being serialized.
+  // This is encoded in MSB order. (0x00000000 if master key)
+  var index = buffer.readUInt32BE(9)
+  assert(depth > 0 || index === 0, 'Invalid index')
+
+  // 32 bytes: the chain code
+  var chainCode = buffer.slice(13, 45)
+  var data, hd
+
+  // 33 bytes: private key data (0x00 + k)
+  if (version === network.bip32.private) {
+    assert.strictEqual(buffer.readUInt8(45), 0x00, 'Invalid private key')
+    data = buffer.slice(46, 78)
+    var d = BigInteger.fromBuffer(data)
+    hd = new HDNode(d, chainCode, network)
+
+  // 33 bytes: public key data (0x02 + X or 0x03 + X)
+  } else {
+    data = buffer.slice(45, 78)
+    var Q = ecurve.Point.decodeFrom(curve, data)
+    assert.equal(Q.compressed, true, 'Invalid public key')
+
+    // Verify that the X coordinate in the public point corresponds to a point on the curve.
+    // If not, the extended public key is invalid.
+    curve.validate(Q)
+
+    hd = new HDNode(Q, chainCode, network)
+  }
+
+  hd.depth = depth
+  hd.index = index
+  hd.parentFingerprint = parentFingerprint
+
+  return hd
+}
+
+// FIXME: remove in 2.x.y
+HDNode.fromHex = function (hex, network) {
+  return HDNode.fromBuffer(new Buffer(hex, 'hex'), network)
+}
+
+HDNode.prototype.getIdentifier = function () {
+  return bcrypto.hash160(this.pubKey.toBuffer())
+}
+
+HDNode.prototype.getFingerprint = function () {
+  return this.getIdentifier().slice(0, 4)
+}
+
+HDNode.prototype.getAddress = function () {
+  return this.pubKey.getAddress(this.network)
+}
+
+HDNode.prototype.neutered = function () {
+  var neutered = new HDNode(this.pubKey.Q, this.chainCode, this.network)
+  neutered.depth = this.depth
+  neutered.index = this.index
+  neutered.parentFingerprint = this.parentFingerprint
+
+  return neutered
+}
+
+HDNode.prototype.toBase58 = function (isPrivate) {
+  return base58check.encode(this.toBuffer(isPrivate, true))
+}
+
+// FIXME: remove in 2.x.y
+HDNode.prototype.toBuffer = function (isPrivate, __ignoreDeprecation) {
+  if (isPrivate === undefined) {
+    isPrivate = !!this.privKey
+
+  // FIXME: remove in 2.x.y
+  } else {
+    console.warn('isPrivate flag is deprecated, please use the .neutered() method instead')
+  }
+
+  if (!__ignoreDeprecation) {
+    console.warn('HDNode.toBuffer() is deprecated for removal in 2.x.y, use toBase58 instead')
+  }
+
+  // Version
+  var version = isPrivate ? this.network.bip32.private : this.network.bip32.public
+  var buffer = new Buffer(HDNode.LENGTH)
+
+  // 4 bytes: version bytes
+  buffer.writeUInt32BE(version, 0)
+
+  // Depth
+  // 1 byte: depth: 0x00 for master nodes, 0x01 for level-1 descendants, ....
+  buffer.writeUInt8(this.depth, 4)
+
+  // 4 bytes: the fingerprint of the parent's key (0x00000000 if master key)
+  buffer.writeUInt32BE(this.parentFingerprint, 5)
+
+  // 4 bytes: child number. This is the number i in xi = xpar/i, with xi the key being serialized.
+  // This is encoded in Big endian. (0x00000000 if master key)
+  buffer.writeUInt32BE(this.index, 9)
+
+  // 32 bytes: the chain code
+  this.chainCode.copy(buffer, 13)
+
+  // 33 bytes: the public key or private key data
+  if (isPrivate) {
+    // FIXME: remove in 2.x.y
+    assert(this.privKey, 'Missing private key')
+
+    // 0x00 + k for private keys
+    buffer.writeUInt8(0, 45)
+    this.privKey.d.toBuffer(32).copy(buffer, 46)
+  } else {
+    // X9.62 encoding for public keys
+    this.pubKey.toBuffer().copy(buffer, 45)
+  }
+
+  return buffer
+}
+
+// FIXME: remove in 2.x.y
+HDNode.prototype.toHex = function (isPrivate) {
+  return this.toBuffer(isPrivate).toString('hex')
+}
+
+// https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#child-key-derivation-ckd-functions
+HDNode.prototype.derive = function (index) {
+  var isHardened = index >= HDNode.HIGHEST_BIT
+  var indexBuffer = new Buffer(4)
+  indexBuffer.writeUInt32BE(index, 0)
+
+  var data
+
+  // Hardened child
+  if (isHardened) {
+    assert(this.privKey, 'Could not derive hardened child key')
+
+    // data = 0x00 || ser256(kpar) || ser32(index)
+    data = Buffer.concat([
+      this.privKey.d.toBuffer(33),
+      indexBuffer
+    ])
+
+  // Normal child
+  } else {
+    // data = serP(point(kpar)) || ser32(index)
+    //      = serP(Kpar) || ser32(index)
+    data = Buffer.concat([
+      this.pubKey.toBuffer(),
+      indexBuffer
+    ])
+  }
+
+  var I = createHmac('sha512', this.chainCode).update(data).digest()
+  var IL = I.slice(0, 32)
+  var IR = I.slice(32)
+
+  var pIL = BigInteger.fromBuffer(IL)
+
+  // In case parse256(IL) >= n, proceed with the next value for i
+  if (pIL.compareTo(curve.n) >= 0) {
+    return this.derive(index + 1)
+  }
+
+  // Private parent key -> private child key
+  var hd
+  if (this.privKey) {
+    // ki = parse256(IL) + kpar (mod n)
+    var ki = pIL.add(this.privKey.d).mod(curve.n)
+
+    // In case ki == 0, proceed with the next value for i
+    if (ki.signum() === 0) {
+      return this.derive(index + 1)
+    }
+
+    hd = new HDNode(ki, IR, this.network)
+
+  // Public parent key -> public child key
+  } else {
+    // Ki = point(parse256(IL)) + Kpar
+    //    = G*IL + Kpar
+    var Ki = curve.G.multiply(pIL).add(this.pubKey.Q)
+
+    // In case Ki is the point at infinity, proceed with the next value for i
+    if (curve.isInfinity(Ki)) {
+      return this.derive(index + 1)
+    }
+
+    hd = new HDNode(Ki, IR, this.network)
+  }
+
+  hd.depth = this.depth + 1
+  hd.index = index
+  hd.parentFingerprint = this.getFingerprint().readUInt32BE(0)
+
+  return hd
+}
+
+HDNode.prototype.deriveHardened = function (index) {
+  // Only derives hardened private keys by default
+  return this.derive(index + HDNode.HIGHEST_BIT)
+}
+
+HDNode.prototype.toString = HDNode.prototype.toBase58
+
+module.exports = HDNode
+
+}).call(this,require("buffer").Buffer)
+},{"./crypto":58,"./eckey":60,"./ecpubkey":61,"./networks":66,"assert":5,"bigi":3,"bs58check":31,"buffer":7,"create-hmac":45,"ecurve":49,"typeforce":53}],64:[function(require,module,exports){
+module.exports = {
+  Address: require('./address'),
+  base58check: require('./base58check'),
+  Block: require('./block'),
+  bufferutils: require('./bufferutils'),
+  crypto: require('./crypto'),
+  ecdsa: require('./ecdsa'),
+  ECKey: require('./eckey'),
+  ECPubKey: require('./ecpubkey'),
+  ECSignature: require('./ecsignature'),
+  Message: require('./message'),
+  opcodes: require('./opcodes'),
+  HDNode: require('./hdnode'),
+  Script: require('./script'),
+  scripts: require('./scripts'),
+  Transaction: require('./transaction'),
+  TransactionBuilder: require('./transaction_builder'),
+  networks: require('./networks'),
+  Wallet: require('./wallet')
+}
+
+},{"./address":54,"./base58check":55,"./block":56,"./bufferutils":57,"./crypto":58,"./ecdsa":59,"./eckey":60,"./ecpubkey":61,"./ecsignature":62,"./hdnode":63,"./message":65,"./networks":66,"./opcodes":67,"./script":68,"./scripts":69,"./transaction":70,"./transaction_builder":71,"./wallet":72}],65:[function(require,module,exports){
+(function (Buffer){
+var bufferutils = require('./bufferutils')
+var crypto = require('./crypto')
+var ecdsa = require('./ecdsa')
+var networks = require('./networks')
+
+var BigInteger = require('bigi')
+var ECPubKey = require('./ecpubkey')
+var ECSignature = require('./ecsignature')
+
+var ecurve = require('ecurve')
+var ecparams = ecurve.getCurveByName('secp256k1')
+
+function magicHash (message, network) {
+  var magicPrefix = new Buffer(network.magicPrefix)
+  var messageBuffer = new Buffer(message)
+  var lengthBuffer = bufferutils.varIntBuffer(messageBuffer.length)
+
+  var buffer = Buffer.concat([magicPrefix, lengthBuffer, messageBuffer])
+  return crypto.hash256(buffer)
+}
+
+function sign (privKey, message, network) {
+  network = network || networks.bitcoin
+
+  var hash = magicHash(message, network)
+  var signature = privKey.sign(hash)
+  var e = BigInteger.fromBuffer(hash)
+  var i = ecdsa.calcPubKeyRecoveryParam(ecparams, e, signature, privKey.pub.Q)
+
+  return signature.toCompact(i, privKey.pub.compressed)
+}
+
+// TODO: network could be implied from address
+function verify (address, signature, message, network) {
+  if (!Buffer.isBuffer(signature)) {
+    signature = new Buffer(signature, 'base64')
+  }
+
+  network = network || networks.bitcoin
+
+  var hash = magicHash(message, network)
+  var parsed = ECSignature.parseCompact(signature)
+  var e = BigInteger.fromBuffer(hash)
+  var Q = ecdsa.recoverPubKey(ecparams, e, parsed.signature, parsed.i)
+
+  var pubKey = new ECPubKey(Q, parsed.compressed)
+  return pubKey.getAddress(network).toString() === address.toString()
+}
+
+module.exports = {
+  magicHash: magicHash,
+  sign: sign,
+  verify: verify
+}
+
+}).call(this,require("buffer").Buffer)
+},{"./bufferutils":57,"./crypto":58,"./ecdsa":59,"./ecpubkey":61,"./ecsignature":62,"./networks":66,"bigi":3,"buffer":7,"ecurve":49}],66:[function(require,module,exports){
+// https://en.bitcoin.it/wiki/List_of_address_prefixes
+// Dogecoin BIP32 is a proposed standard: https://bitcointalk.org/index.php?topic=409731
+
+var networks = {
+  bitcoin: {
+    magicPrefix: '\x18Bitcoin Signed Message:\n',
+    bip32: {
+      public: 0x0488b21e,
+      private: 0x0488ade4
+    },
+    pubKeyHash: 0x00,
+    scriptHash: 0x05,
+    wif: 0x80,
+    dustThreshold: 546, // https://github.com/bitcoin/bitcoin/blob/v0.9.2/src/core.h#L151-L162
+    feePerKb: 10000, // https://github.com/bitcoin/bitcoin/blob/v0.9.2/src/main.cpp#L53
+    estimateFee: estimateFee('bitcoin')
+  },
+  testnet: {
+    magicPrefix: '\x18Bitcoin Signed Message:\n',
+    bip32: {
+      public: 0x043587cf,
+      private: 0x04358394
+    },
+    pubKeyHash: 0x6f,
+    scriptHash: 0xc4,
+    wif: 0xef,
+    dustThreshold: 546,
+    feePerKb: 10000,
+    estimateFee: estimateFee('testnet')
+  },
+  litecoin: {
+    magicPrefix: '\x19Litecoin Signed Message:\n',
+    bip32: {
+      public: 0x019da462,
+      private: 0x019d9cfe
+    },
+    pubKeyHash: 0x30,
+    scriptHash: 0x05,
+    wif: 0xb0,
+    dustThreshold: 0, // https://github.com/litecoin-project/litecoin/blob/v0.8.7.2/src/main.cpp#L360-L365
+    dustSoftThreshold: 100000, // https://github.com/litecoin-project/litecoin/blob/v0.8.7.2/src/main.h#L53
+    feePerKb: 100000, // https://github.com/litecoin-project/litecoin/blob/v0.8.7.2/src/main.cpp#L56
+    estimateFee: estimateFee('litecoin')
+  },
+  dogecoin: {
+    magicPrefix: '\x19Dogecoin Signed Message:\n',
+    bip32: {
+      public: 0x02facafd,
+      private: 0x02fac398
+    },
+    pubKeyHash: 0x1e,
+    scriptHash: 0x16,
+    wif: 0x9e,
+    dustThreshold: 0, // https://github.com/dogecoin/dogecoin/blob/v1.7.1/src/core.h#L155-L160
+    dustSoftThreshold: 100000000, // https://github.com/dogecoin/dogecoin/blob/v1.7.1/src/main.h#L62
+    feePerKb: 100000000, // https://github.com/dogecoin/dogecoin/blob/v1.7.1/src/main.cpp#L58
+    estimateFee: estimateFee('dogecoin')
+  },
+  viacoin: {
+    magicPrefix: '\x18Viacoin Signed Message:\n',
+    bip32: {
+      public: 0x0488b21e,
+      private: 0x0488ade4
+    },
+    pubKeyHash: 0x47,
+    scriptHash: 0x21,
+    wif: 0xc7,
+    dustThreshold: 560,
+    dustSoftThreshold: 100000,
+    feePerKb: 100000, //
+    estimateFee: estimateFee('viacoin')
+  },
+  viacointestnet: {
+    magicPrefix: '\x18Viacoin Signed Message:\n',
+    bip32: {
+      public: 0x043587cf,
+      private: 0x04358394
+    },
+    pubKeyHash: 0x7f,
+    scriptHash: 0xc4,
+    wif: 0xff,
+    dustThreshold: 560,
+    dustSoftThreshold: 100000,
+    feePerKb: 100000,
+    estimateFee: estimateFee('viacointestnet')
+  },
+  gamerscoin: {
+    magicPrefix: '\x19Gamerscoin Signed Message:\n',
+    bip32: {
+      public: 0x019da462,
+      private: 0x019d9cfe
+    },
+    pubKeyHash: 0x26,
+    scriptHash: 0x05,
+    wif: 0xA6,
+    dustThreshold: 0, // https://github.com/gamers-coin/gamers-coinv3/blob/master/src/main.cpp#L358-L363
+    dustSoftThreshold: 100000, // https://github.com/gamers-coin/gamers-coinv3/blob/master/src/main.cpp#L51
+    feePerKb: 100000, // https://github.com/gamers-coin/gamers-coinv3/blob/master/src/main.cpp#L54
+    estimateFee: estimateFee('gamerscoin')
+  },
+  jumbucks: {
+    magicPrefix: '\x19Jumbucks Signed Message:\n',
+    bip32: {
+      public: 0x037a689a,
+      private: 0x037a6460
+    },
+    pubKeyHash: 0x2b,
+    scriptHash: 0x05,
+    wif: 0xab,
+    dustThreshold: 0,
+    dustSoftThreshold: 10000,
+    feePerKb: 10000,
+    estimateFee: estimateFee('jumbucks')
+  },
+  zetacoin: {
+    magicPrefix: '\x18Zetacoin Signed Message:\n',
+    bip32: {
+      public: 0x0488b21e,
+      private: 0x0488ade4
+    },
+    pubKeyHash: 0x50,
+    scriptHash: 0x09,
+    wif: 0xe0,
+    dustThreshold: 546, // https://github.com/zetacoin/zetacoin/blob/master/src/core.h#L159
+    feePerKb: 10000, // https://github.com/zetacoin/zetacoin/blob/master/src/main.cpp#L54
+    estimateFee: estimateFee('zetacoin')
+  }
+}
+
+function estimateFee (type) {
+  return function (tx) {
+    var network = networks[type]
+    var baseFee = network.feePerKb
+    var byteSize = tx.toBuffer().length
+
+    var fee = baseFee * Math.ceil(byteSize / 1000)
+    if (network.dustSoftThreshold === undefined) return fee
+
+    tx.outs.forEach(function (e) {
+      if (e.value < network.dustSoftThreshold) {
+        fee += baseFee
+      }
+    })
+
+    return fee
+  }
+}
+
+module.exports = networks
+
+},{}],67:[function(require,module,exports){
+module.exports = {
+  // push value
+  OP_FALSE: 0,
+  OP_0: 0,
+  OP_PUSHDATA1: 76,
+  OP_PUSHDATA2: 77,
+  OP_PUSHDATA4: 78,
+  OP_1NEGATE: 79,
+  OP_RESERVED: 80,
+  OP_1: 81,
+  OP_TRUE: 81,
+  OP_2: 82,
+  OP_3: 83,
+  OP_4: 84,
+  OP_5: 85,
+  OP_6: 86,
+  OP_7: 87,
+  OP_8: 88,
+  OP_9: 89,
+  OP_10: 90,
+  OP_11: 91,
+  OP_12: 92,
+  OP_13: 93,
+  OP_14: 94,
+  OP_15: 95,
+  OP_16: 96,
+
+  // control
+  OP_NOP: 97,
+  OP_VER: 98,
+  OP_IF: 99,
+  OP_NOTIF: 100,
+  OP_VERIF: 101,
+  OP_VERNOTIF: 102,
+  OP_ELSE: 103,
+  OP_ENDIF: 104,
+  OP_VERIFY: 105,
+  OP_RETURN: 106,
+
+  // stack ops
+  OP_TOALTSTACK: 107,
+  OP_FROMALTSTACK: 108,
+  OP_2DROP: 109,
+  OP_2DUP: 110,
+  OP_3DUP: 111,
+  OP_2OVER: 112,
+  OP_2ROT: 113,
+  OP_2SWAP: 114,
+  OP_IFDUP: 115,
+  OP_DEPTH: 116,
+  OP_DROP: 117,
+  OP_DUP: 118,
+  OP_NIP: 119,
+  OP_OVER: 120,
+  OP_PICK: 121,
+  OP_ROLL: 122,
+  OP_ROT: 123,
+  OP_SWAP: 124,
+  OP_TUCK: 125,
+
+  // splice ops
+  OP_CAT: 126,
+  OP_SUBSTR: 127,
+  OP_LEFT: 128,
+  OP_RIGHT: 129,
+  OP_SIZE: 130,
+
+  // bit logic
+  OP_INVERT: 131,
+  OP_AND: 132,
+  OP_OR: 133,
+  OP_XOR: 134,
+  OP_EQUAL: 135,
+  OP_EQUALVERIFY: 136,
+  OP_RESERVED1: 137,
+  OP_RESERVED2: 138,
+
+  // numeric
+  OP_1ADD: 139,
+  OP_1SUB: 140,
+  OP_2MUL: 141,
+  OP_2DIV: 142,
+  OP_NEGATE: 143,
+  OP_ABS: 144,
+  OP_NOT: 145,
+  OP_0NOTEQUAL: 146,
+
+  OP_ADD: 147,
+  OP_SUB: 148,
+  OP_MUL: 149,
+  OP_DIV: 150,
+  OP_MOD: 151,
+  OP_LSHIFT: 152,
+  OP_RSHIFT: 153,
+
+  OP_BOOLAND: 154,
+  OP_BOOLOR: 155,
+  OP_NUMEQUAL: 156,
+  OP_NUMEQUALVERIFY: 157,
+  OP_NUMNOTEQUAL: 158,
+  OP_LESSTHAN: 159,
+  OP_GREATERTHAN: 160,
+  OP_LESSTHANOREQUAL: 161,
+  OP_GREATERTHANOREQUAL: 162,
+  OP_MIN: 163,
+  OP_MAX: 164,
+
+  OP_WITHIN: 165,
+
+  // crypto
+  OP_RIPEMD160: 166,
+  OP_SHA1: 167,
+  OP_SHA256: 168,
+  OP_HASH160: 169,
+  OP_HASH256: 170,
+  OP_CODESEPARATOR: 171,
+  OP_CHECKSIG: 172,
+  OP_CHECKSIGVERIFY: 173,
+  OP_CHECKMULTISIG: 174,
+  OP_CHECKMULTISIGVERIFY: 175,
+
+  // expansion
+  OP_NOP1: 176,
+  OP_NOP2: 177,
+  OP_NOP3: 178,
+  OP_NOP4: 179,
+  OP_NOP5: 180,
+  OP_NOP6: 181,
+  OP_NOP7: 182,
+  OP_NOP8: 183,
+  OP_NOP9: 184,
+  OP_NOP10: 185,
+
+  // template matching params
+  OP_PUBKEYHASH: 253,
+  OP_PUBKEY: 254,
+  OP_INVALIDOPCODE: 255
+}
+
+},{}],68:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var bufferutils = require('./bufferutils')
+var crypto = require('./crypto')
+var typeForce = require('typeforce')
+var opcodes = require('./opcodes')
+
+function Script (buffer, chunks) {
+  typeForce('Buffer', buffer)
+  typeForce('Array', chunks)
+
+  this.buffer = buffer
+  this.chunks = chunks
+}
+
+Script.fromASM = function (asm) {
+  var strChunks = asm.split(' ')
+  var chunks = strChunks.map(function (strChunk) {
+    // opcode
+    if (strChunk in opcodes) {
+      return opcodes[strChunk]
+
+    // data chunk
+    } else {
+      return new Buffer(strChunk, 'hex')
+    }
+  })
+
+  return Script.fromChunks(chunks)
+}
+
+Script.fromBuffer = function (buffer) {
+  var chunks = []
+  var i = 0
+
+  while (i < buffer.length) {
+    var opcode = buffer.readUInt8(i)
+
+    // data chunk
+    if ((opcode > opcodes.OP_0) && (opcode <= opcodes.OP_PUSHDATA4)) {
+      var d = bufferutils.readPushDataInt(buffer, i)
+
+      // did reading a pushDataInt fail? return non-chunked script
+      if (d === null) return new Script(buffer, [])
+      i += d.size
+
+      // attempt to read too much data?
+      if (i + d.number > buffer.length) return new Script(buffer, [])
+
+      var data = buffer.slice(i, i + d.number)
+      i += d.number
+
+      chunks.push(data)
+
+    // opcode
+    } else {
+      chunks.push(opcode)
+
+      i += 1
+    }
+  }
+
+  return new Script(buffer, chunks)
+}
+
+Script.fromChunks = function (chunks) {
+  typeForce('Array', chunks)
+
+  var bufferSize = chunks.reduce(function (accum, chunk) {
+    // data chunk
+    if (Buffer.isBuffer(chunk)) {
+      return accum + bufferutils.pushDataSize(chunk.length) + chunk.length
+    }
+
+    // opcode
+    return accum + 1
+  }, 0.0)
+
+  var buffer = new Buffer(bufferSize)
+  var offset = 0
+
+  chunks.forEach(function (chunk) {
+    // data chunk
+    if (Buffer.isBuffer(chunk)) {
+      offset += bufferutils.writePushDataInt(buffer, chunk.length, offset)
+
+      chunk.copy(buffer, offset)
+      offset += chunk.length
+
+    // opcode
+    } else {
+      buffer.writeUInt8(chunk, offset)
+      offset += 1
+    }
+  })
+
+  assert.equal(offset, buffer.length, 'Could not decode chunks')
+  return new Script(buffer, chunks)
+}
+
+Script.fromHex = function (hex) {
+  return Script.fromBuffer(new Buffer(hex, 'hex'))
+}
+
+Script.EMPTY = Script.fromChunks([])
+
+Script.prototype.getHash = function () {
+  return crypto.hash160(this.buffer)
+}
+
+// FIXME: doesn't work for data chunks, maybe time to use buffertools.compare...
+Script.prototype.without = function (needle) {
+  return Script.fromChunks(this.chunks.filter(function (op) {
+    return op !== needle
+  }))
+}
+
+var reverseOps = []
+for (var op in opcodes) {
+  var code = opcodes[op]
+  reverseOps[code] = op
+}
+
+Script.prototype.toASM = function () {
+  return this.chunks.map(function (chunk) {
+    // data chunk
+    if (Buffer.isBuffer(chunk)) {
+      return chunk.toString('hex')
+
+    // opcode
+    } else {
+      return reverseOps[chunk]
+    }
+  }).join(' ')
+}
+
+Script.prototype.toBuffer = function () {
+  return this.buffer
+}
+
+Script.prototype.toHex = function () {
+  return this.toBuffer().toString('hex')
+}
+
+module.exports = Script
+
+}).call(this,require("buffer").Buffer)
+},{"./bufferutils":57,"./crypto":58,"./opcodes":67,"assert":5,"buffer":7,"typeforce":53}],69:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var ops = require('./opcodes')
+var typeForce = require('typeforce')
+
+var ecurve = require('ecurve')
+var curve = ecurve.getCurveByName('secp256k1')
+
+var ECSignature = require('./ecsignature')
+var Script = require('./script')
+
+function isCanonicalPubKey (buffer) {
+  if (!Buffer.isBuffer(buffer)) return false
+
+  try {
+    ecurve.Point.decodeFrom(curve, buffer)
+  } catch (e) {
+    if (!(e.message.match(/Invalid sequence (length|tag)/)))
+      throw e
+
+    return false
+  }
+
+  return true
+}
+
+function isCanonicalSignature (buffer) {
+  if (!Buffer.isBuffer(buffer)) return false
+
+  try {
+    ECSignature.parseScriptSignature(buffer)
+  } catch (e) {
+    if (!(e.message.match(/Not a DER sequence|Invalid sequence length|Expected a DER integer|R length is zero|S length is zero|R value excessively padded|S value excessively padded|R value is negative|S value is negative|Invalid hashType/))) {
+      throw e
+    }
+
+    return false
+  }
+
+  return true
+}
+
+function isPubKeyHashInput (script) {
+  return script.chunks.length === 2 &&
+    isCanonicalSignature(script.chunks[0]) &&
+    isCanonicalPubKey(script.chunks[1])
+}
+
+function isPubKeyHashOutput (script) {
+  return script.chunks.length === 5 &&
+    script.chunks[0] === ops.OP_DUP &&
+    script.chunks[1] === ops.OP_HASH160 &&
+    Buffer.isBuffer(script.chunks[2]) &&
+    script.chunks[2].length === 20 &&
+    script.chunks[3] === ops.OP_EQUALVERIFY &&
+    script.chunks[4] === ops.OP_CHECKSIG
+}
+
+function isPubKeyInput (script) {
+  return script.chunks.length === 1 &&
+    isCanonicalSignature(script.chunks[0])
+}
+
+function isPubKeyOutput (script) {
+  return script.chunks.length === 2 &&
+    isCanonicalPubKey(script.chunks[0]) &&
+    script.chunks[1] === ops.OP_CHECKSIG
+}
+
+function isScriptHashInput (script, allowIncomplete) {
+  if (script.chunks.length < 2) return false
+
+  var lastChunk = script.chunks[script.chunks.length - 1]
+  if (!Buffer.isBuffer(lastChunk)) return false
+
+  var scriptSig = Script.fromChunks(script.chunks.slice(0, -1))
+  var redeemScript = Script.fromBuffer(lastChunk)
+
+  // is redeemScript a valid script?
+  if (redeemScript.chunks.length === 0) return false
+
+  return classifyInput(scriptSig, allowIncomplete) === classifyOutput(redeemScript)
+}
+
+function isScriptHashOutput (script) {
+  return script.chunks.length === 3 &&
+    script.chunks[0] === ops.OP_HASH160 &&
+    Buffer.isBuffer(script.chunks[1]) &&
+    script.chunks[1].length === 20 &&
+    script.chunks[2] === ops.OP_EQUAL
+}
+
+// allowIncomplete is to account for combining signatures
+// See https://github.com/bitcoin/bitcoin/blob/f425050546644a36b0b8e0eb2f6934a3e0f6f80f/src/script/sign.cpp#L195-L197
+function isMultisigInput (script, allowIncomplete) {
+  if (script.chunks.length < 2) return false
+  if (script.chunks[0] !== ops.OP_0) return false
+
+  if (allowIncomplete) {
+    return script.chunks.slice(1).every(function (chunk) {
+      return chunk === ops.OP_0 || isCanonicalSignature(chunk)
+    })
+  }
+
+  return script.chunks.slice(1).every(isCanonicalSignature)
+}
+
+function isMultisigOutput (script) {
+  if (script.chunks.length < 4) return false
+  if (script.chunks[script.chunks.length - 1] !== ops.OP_CHECKMULTISIG) return false
+
+  var mOp = script.chunks[0]
+  if (mOp === ops.OP_0) return false
+  if (mOp < ops.OP_1) return false
+  if (mOp > ops.OP_16) return false
+
+  var nOp = script.chunks[script.chunks.length - 2]
+  if (nOp === ops.OP_0) return false
+  if (nOp < ops.OP_1) return false
+  if (nOp > ops.OP_16) return false
+
+  var m = mOp - (ops.OP_1 - 1)
+  var n = nOp - (ops.OP_1 - 1)
+  if (n < m) return false
+
+  var pubKeys = script.chunks.slice(1, -2)
+  if (n < pubKeys.length) return false
+
+  return pubKeys.every(isCanonicalPubKey)
+}
+
+function isNullDataOutput (script) {
+  return script.chunks[0] === ops.OP_RETURN
+}
+
+function classifyOutput (script) {
+  typeForce('Script', script)
+
+  if (isPubKeyHashOutput(script)) {
+    return 'pubkeyhash'
+  } else if (isScriptHashOutput(script)) {
+    return 'scripthash'
+  } else if (isMultisigOutput(script)) {
+    return 'multisig'
+  } else if (isPubKeyOutput(script)) {
+    return 'pubkey'
+  } else if (isNullDataOutput(script)) {
+    return 'nulldata'
+  }
+
+  return 'nonstandard'
+}
+
+function classifyInput (script, allowIncomplete) {
+  typeForce('Script', script)
+
+  if (isPubKeyHashInput(script)) {
+    return 'pubkeyhash'
+  } else if (isMultisigInput(script, allowIncomplete)) {
+    return 'multisig'
+  } else if (isScriptHashInput(script, allowIncomplete)) {
+    return 'scripthash'
+  } else if (isPubKeyInput(script)) {
+    return 'pubkey'
+  }
+
+  return 'nonstandard'
+}
+
+// Standard Script Templates
+// {pubKey} OP_CHECKSIG
+function pubKeyOutput (pubKey) {
+  return Script.fromChunks([
+    pubKey.toBuffer(),
+    ops.OP_CHECKSIG
+  ])
+}
+
+// OP_DUP OP_HASH160 {pubKeyHash} OP_EQUALVERIFY OP_CHECKSIG
+function pubKeyHashOutput (hash) {
+  typeForce('Buffer', hash)
+
+  return Script.fromChunks([
+    ops.OP_DUP,
+    ops.OP_HASH160,
+    hash,
+    ops.OP_EQUALVERIFY,
+    ops.OP_CHECKSIG
+  ])
+}
+
+// OP_HASH160 {scriptHash} OP_EQUAL
+function scriptHashOutput (hash) {
+  typeForce('Buffer', hash)
+
+  return Script.fromChunks([
+    ops.OP_HASH160,
+    hash,
+    ops.OP_EQUAL
+  ])
+}
+
+// m [pubKeys ...] n OP_CHECKMULTISIG
+function multisigOutput (m, pubKeys) {
+  typeForce(['ECPubKey'], pubKeys)
+
+  assert(pubKeys.length >= m, 'Not enough pubKeys provided')
+
+  var pubKeyBuffers = pubKeys.map(function (pubKey) {
+    return pubKey.toBuffer()
+  })
+  var n = pubKeys.length
+
+  return Script.fromChunks([].concat(
+    (ops.OP_1 - 1) + m,
+    pubKeyBuffers,
+    (ops.OP_1 - 1) + n,
+    ops.OP_CHECKMULTISIG
+  ))
+}
+
+// {signature}
+function pubKeyInput (signature) {
+  typeForce('Buffer', signature)
+
+  return Script.fromChunks([signature])
+}
+
+// {signature} {pubKey}
+function pubKeyHashInput (signature, pubKey) {
+  typeForce('Buffer', signature)
+
+  return Script.fromChunks([signature, pubKey.toBuffer()])
+}
+
+// <scriptSig> {serialized scriptPubKey script}
+function scriptHashInput (scriptSig, scriptPubKey) {
+  return Script.fromChunks([].concat(
+    scriptSig.chunks,
+    scriptPubKey.toBuffer()
+  ))
+}
+
+// OP_0 [signatures ...]
+function multisigInput (signatures, scriptPubKey) {
+  if (scriptPubKey) {
+    assert(isMultisigOutput(scriptPubKey))
+
+    var mOp = scriptPubKey.chunks[0]
+    var nOp = scriptPubKey.chunks[scriptPubKey.chunks.length - 2]
+    var m = mOp - (ops.OP_1 - 1)
+    var n = nOp - (ops.OP_1 - 1)
+
+    assert(signatures.length >= m, 'Not enough signatures provided')
+    assert(signatures.length <= n, 'Too many signatures provided')
+  }
+
+  return Script.fromChunks([].concat(ops.OP_0, signatures))
+}
+
+function nullDataOutput (data) {
+  return Script.fromChunks([ops.OP_RETURN, data])
+}
+
+module.exports = {
+  isCanonicalPubKey: isCanonicalPubKey,
+  isCanonicalSignature: isCanonicalSignature,
+  isPubKeyHashInput: isPubKeyHashInput,
+  isPubKeyHashOutput: isPubKeyHashOutput,
+  isPubKeyInput: isPubKeyInput,
+  isPubKeyOutput: isPubKeyOutput,
+  isScriptHashInput: isScriptHashInput,
+  isScriptHashOutput: isScriptHashOutput,
+  isMultisigInput: isMultisigInput,
+  isMultisigOutput: isMultisigOutput,
+  isNullDataOutput: isNullDataOutput,
+  classifyOutput: classifyOutput,
+  classifyInput: classifyInput,
+  pubKeyOutput: pubKeyOutput,
+  pubKeyHashOutput: pubKeyHashOutput,
+  scriptHashOutput: scriptHashOutput,
+  multisigOutput: multisigOutput,
+  pubKeyInput: pubKeyInput,
+  pubKeyHashInput: pubKeyHashInput,
+  scriptHashInput: scriptHashInput,
+  multisigInput: multisigInput,
+  dataOutput: function (data) {
+    console.warn('dataOutput is deprecated, use nullDataOutput by 2.0.0')
+    return nullDataOutput(data)
+  },
+  nullDataOutput: nullDataOutput
+}
+
+}).call(this,require("buffer").Buffer)
+},{"./ecsignature":62,"./opcodes":67,"./script":68,"assert":5,"buffer":7,"ecurve":49,"typeforce":53}],70:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var bufferutils = require('./bufferutils')
+var crypto = require('./crypto')
+var typeForce = require('typeforce')
+var opcodes = require('./opcodes')
+var scripts = require('./scripts')
+
+var Address = require('./address')
+var ECSignature = require('./ecsignature')
+var Script = require('./script')
+
+function Transaction () {
+  this.version = 1
+  this.locktime = 0
+  this.ins = []
+  this.outs = []
+}
+
+Transaction.DEFAULT_SEQUENCE = 0xffffffff
+Transaction.SIGHASH_ALL = 0x01
+Transaction.SIGHASH_NONE = 0x02
+Transaction.SIGHASH_SINGLE = 0x03
+Transaction.SIGHASH_ANYONECANPAY = 0x80
+
+Transaction.fromBuffer = function (buffer, __disableAssert) {
+  var offset = 0
+  function readSlice (n) {
+    offset += n
+    return buffer.slice(offset - n, offset)
+  }
+
+  function readUInt32 () {
+    var i = buffer.readUInt32LE(offset)
+    offset += 4
+    return i
+  }
+
+  function readUInt64 () {
+    var i = bufferutils.readUInt64LE(buffer, offset)
+    offset += 8
+    return i
+  }
+
+  function readVarInt () {
+    var vi = bufferutils.readVarInt(buffer, offset)
+    offset += vi.size
+    return vi.number
+  }
+
+  function readScript () {
+    return Script.fromBuffer(readSlice(readVarInt()))
+  }
+
+  function readGenerationScript () {
+    return new Script(readSlice(readVarInt()), [])
+  }
+
+  var tx = new Transaction()
+  tx.version = readUInt32()
+
+  var vinLen = readVarInt()
+  for (var i = 0; i < vinLen; ++i) {
+    var hash = readSlice(32)
+
+    if (Transaction.isCoinbaseHash(hash)) {
+      tx.ins.push({
+        hash: hash,
+        index: readUInt32(),
+        script: readGenerationScript(),
+        sequence: readUInt32()
+      })
+    } else {
+      tx.ins.push({
+        hash: hash,
+        index: readUInt32(),
+        script: readScript(),
+        sequence: readUInt32()
+      })
+    }
+  }
+
+  var voutLen = readVarInt()
+  for (i = 0; i < voutLen; ++i) {
+    tx.outs.push({
+      value: readUInt64(),
+      script: readScript()
+    })
+  }
+
+  tx.locktime = readUInt32()
+
+  if (!__disableAssert) {
+    assert.equal(offset, buffer.length, 'Transaction has unexpected data')
+  }
+
+  return tx
+}
+
+Transaction.fromHex = function (hex) {
+  return Transaction.fromBuffer(new Buffer(hex, 'hex'))
+}
+
+Transaction.isCoinbaseHash = function (buffer) {
+  return Array.prototype.every.call(buffer, function (x) {
+    return x === 0
+  })
+}
+
+/**
+ * Create a new txIn.
+ *
+ * Can be called with any of:
+ *
+ * - A transaction and an index
+ * - A transaction hash and an index
+ *
+ * Note that this method does not sign the created input.
+ */
+Transaction.prototype.addInput = function (hash, index, sequence, script) {
+  if (sequence === undefined || sequence === null) {
+    sequence = Transaction.DEFAULT_SEQUENCE
+  }
+
+  script = script || Script.EMPTY
+
+  if (typeof hash === 'string') {
+    // TxId hex is big-endian, we need little-endian
+    hash = bufferutils.reverse(new Buffer(hash, 'hex'))
+  } else if (hash instanceof Transaction) {
+    hash = hash.getHash()
+  }
+
+  typeForce('Buffer', hash)
+  typeForce('Number', index)
+  typeForce('Number', sequence)
+  typeForce('Script', script)
+
+  assert.equal(hash.length, 32, 'Expected hash length of 32, got ' + hash.length)
+
+  // Add the input and return the input's index
+  return (this.ins.push({
+    hash: hash,
+    index: index,
+    script: script,
+    sequence: sequence
+  }) - 1)
+}
+
+/**
+ * Create a new txOut.
+ *
+ * Can be called with:
+ *
+ * - A base58 address string and a value
+ * - An Address object and a value
+ * - A scriptPubKey Script and a value
+ */
+Transaction.prototype.addOutput = function (scriptPubKey, value) {
+  // Attempt to get a valid address if it's a base58 address string
+  if (typeof scriptPubKey === 'string') {
+    scriptPubKey = Address.fromBase58Check(scriptPubKey)
+  }
+
+  // Attempt to get a valid script if it's an Address object
+  if (scriptPubKey instanceof Address) {
+    scriptPubKey = scriptPubKey.toOutputScript()
+  }
+
+  typeForce('Script', scriptPubKey)
+  typeForce('Number', value)
+
+  // Add the output and return the output's index
+  return (this.outs.push({
+    script: scriptPubKey,
+    value: value
+  }) - 1)
+}
+
+Transaction.prototype.clone = function () {
+  var newTx = new Transaction()
+  newTx.version = this.version
+  newTx.locktime = this.locktime
+
+  newTx.ins = this.ins.map(function (txIn) {
+    return {
+      hash: txIn.hash,
+      index: txIn.index,
+      script: txIn.script,
+      sequence: txIn.sequence
+    }
+  })
+
+  newTx.outs = this.outs.map(function (txOut) {
+    return {
+      script: txOut.script,
+      value: txOut.value
+    }
+  })
+
+  return newTx
+}
+
+/**
+ * Hash transaction for signing a specific input.
+ *
+ * Bitcoin uses a different hash for each signed transaction input. This
+ * method copies the transaction, makes the necessary changes based on the
+ * hashType, serializes and finally hashes the result. This hash can then be
+ * used to sign the transaction input in question.
+ */
+Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashType) {
+  // FIXME: remove in 2.x.y
+  if (arguments[0] instanceof Script) {
+    console.warn('hashForSignature(prevOutScript, inIndex, ...) has been deprecated. Use hashForSignature(inIndex, prevOutScript, ...)')
+
+    // swap the arguments (must be stored in tmp, arguments is special)
+    var tmp = arguments[0]
+    inIndex = arguments[1]
+    prevOutScript = tmp
+  }
+
+  typeForce('Number', inIndex)
+  typeForce('Script', prevOutScript)
+  typeForce('Number', hashType)
+
+  assert(inIndex >= 0, 'Invalid vin index')
+  assert(inIndex < this.ins.length, 'Invalid vin index')
+
+  var txTmp = this.clone()
+  var hashScript = prevOutScript.without(opcodes.OP_CODESEPARATOR)
+
+  // Blank out other inputs' signatures
+  txTmp.ins.forEach(function (txIn) {
+    txIn.script = Script.EMPTY
+  })
+  txTmp.ins[inIndex].script = hashScript
+
+  var hashTypeModifier = hashType & 0x1f
+
+  if (hashTypeModifier === Transaction.SIGHASH_NONE) {
+    assert(false, 'SIGHASH_NONE not yet supported')
+  } else if (hashTypeModifier === Transaction.SIGHASH_SINGLE) {
+    assert(false, 'SIGHASH_SINGLE not yet supported')
+  }
+
+  if (hashType & Transaction.SIGHASH_ANYONECANPAY) {
+    assert(false, 'SIGHASH_ANYONECANPAY not yet supported')
+  }
+
+  var hashTypeBuffer = new Buffer(4)
+  hashTypeBuffer.writeInt32LE(hashType, 0)
+
+  var buffer = Buffer.concat([txTmp.toBuffer(), hashTypeBuffer])
+  return crypto.hash256(buffer)
+}
+
+Transaction.prototype.getHash = function () {
+  return crypto.hash256(this.toBuffer())
+}
+
+Transaction.prototype.getId = function () {
+  // TxHash is little-endian, we need big-endian
+  return bufferutils.reverse(this.getHash()).toString('hex')
+}
+
+Transaction.prototype.toBuffer = function () {
+  function scriptSize (script) {
+    var length = script.buffer.length
+
+    return bufferutils.varIntSize(length) + length
+  }
+
+  var buffer = new Buffer(
+    8 +
+    bufferutils.varIntSize(this.ins.length) +
+    bufferutils.varIntSize(this.outs.length) +
+    this.ins.reduce(function (sum, input) { return sum + 40 + scriptSize(input.script) }, 0) +
+    this.outs.reduce(function (sum, output) { return sum + 8 + scriptSize(output.script) }, 0)
+  )
+
+  var offset = 0
+  function writeSlice (slice) {
+    slice.copy(buffer, offset)
+    offset += slice.length
+  }
+
+  function writeUInt32 (i) {
+    buffer.writeUInt32LE(i, offset)
+    offset += 4
+  }
+
+  function writeUInt64 (i) {
+    bufferutils.writeUInt64LE(buffer, i, offset)
+    offset += 8
+  }
+
+  function writeVarInt (i) {
+    var n = bufferutils.writeVarInt(buffer, i, offset)
+    offset += n
+  }
+
+  writeUInt32(this.version)
+  writeVarInt(this.ins.length)
+
+  this.ins.forEach(function (txIn) {
+    writeSlice(txIn.hash)
+    writeUInt32(txIn.index)
+    writeVarInt(txIn.script.buffer.length)
+    writeSlice(txIn.script.buffer)
+    writeUInt32(txIn.sequence)
+  })
+
+  writeVarInt(this.outs.length)
+  this.outs.forEach(function (txOut) {
+    writeUInt64(txOut.value)
+    writeVarInt(txOut.script.buffer.length)
+    writeSlice(txOut.script.buffer)
+  })
+
+  writeUInt32(this.locktime)
+
+  return buffer
+}
+
+Transaction.prototype.toHex = function () {
+  return this.toBuffer().toString('hex')
+}
+
+Transaction.prototype.setInputScript = function (index, script) {
+  typeForce('Number', index)
+  typeForce('Script', script)
+
+  this.ins[index].script = script
+}
+
+// FIXME: remove in 2.x.y
+Transaction.prototype.sign = function (index, privKey, hashType) {
+  console.warn('Transaction.prototype.sign is deprecated.  Use TransactionBuilder instead.')
+
+  var prevOutScript = privKey.pub.getAddress().toOutputScript()
+  var signature = this.signInput(index, prevOutScript, privKey, hashType)
+
+  var scriptSig = scripts.pubKeyHashInput(signature, privKey.pub)
+  this.setInputScript(index, scriptSig)
+}
+
+// FIXME: remove in 2.x.y
+Transaction.prototype.signInput = function (index, prevOutScript, privKey, hashType) {
+  console.warn('Transaction.prototype.signInput is deprecated.  Use TransactionBuilder instead.')
+
+  hashType = hashType || Transaction.SIGHASH_ALL
+
+  var hash = this.hashForSignature(index, prevOutScript, hashType)
+  var signature = privKey.sign(hash)
+
+  return signature.toScriptSignature(hashType)
+}
+
+// FIXME: remove in 2.x.y
+Transaction.prototype.validateInput = function (index, prevOutScript, pubKey, buffer) {
+  console.warn('Transaction.prototype.validateInput is deprecated.  Use TransactionBuilder instead.')
+
+  var parsed = ECSignature.parseScriptSignature(buffer)
+  var hash = this.hashForSignature(index, prevOutScript, parsed.hashType)
+
+  return pubKey.verify(hash, parsed.signature)
+}
+
+module.exports = Transaction
+
+}).call(this,require("buffer").Buffer)
+},{"./address":54,"./bufferutils":57,"./crypto":58,"./ecsignature":62,"./opcodes":67,"./script":68,"./scripts":69,"assert":5,"buffer":7,"typeforce":53}],71:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var ops = require('./opcodes')
+var scripts = require('./scripts')
+
+var ECPubKey = require('./ecpubkey')
+var ECSignature = require('./ecsignature')
+var Script = require('./script')
+var Transaction = require('./transaction')
+
+function extractInput (txIn) {
+  var redeemScript
+  var scriptSig = txIn.script
+  var prevOutScript
+  var prevOutType = scripts.classifyInput(scriptSig, true)
+  var scriptType
+
+  // Re-classify if scriptHash
+  if (prevOutType === 'scripthash') {
+    redeemScript = Script.fromBuffer(scriptSig.chunks.slice(-1)[0])
+    prevOutScript = scripts.scriptHashOutput(redeemScript.getHash())
+
+    scriptSig = Script.fromChunks(scriptSig.chunks.slice(0, -1))
+    scriptType = scripts.classifyInput(scriptSig, true)
+  } else {
+    scriptType = prevOutType
+  }
+
+  // Extract hashType, pubKeys and signatures
+  var hashType, parsed, pubKeys, signatures
+
+  switch (scriptType) {
+    case 'pubkeyhash': {
+      parsed = ECSignature.parseScriptSignature(scriptSig.chunks[0])
+      hashType = parsed.hashType
+      pubKeys = [ECPubKey.fromBuffer(scriptSig.chunks[1])]
+      signatures = [parsed.signature]
+      prevOutScript = pubKeys[0].getAddress().toOutputScript()
+
+      break
+    }
+
+    case 'pubkey': {
+      parsed = ECSignature.parseScriptSignature(scriptSig.chunks[0])
+      hashType = parsed.hashType
+      signatures = [parsed.signature]
+
+      if (redeemScript) {
+        pubKeys = [ECPubKey.fromBuffer(redeemScript.chunks[0])]
+      }
+
+      break
+    }
+
+    case 'multisig': {
+      signatures = scriptSig.chunks.slice(1).map(function (chunk) {
+        if (chunk === ops.OP_0) return chunk
+
+        var parsed = ECSignature.parseScriptSignature(chunk)
+        hashType = parsed.hashType
+
+        return parsed.signature
+      })
+
+      if (redeemScript) {
+        pubKeys = redeemScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
+      }
+
+      break
+    }
+  }
+
+  return {
+    hashType: hashType,
+    prevOutScript: prevOutScript,
+    prevOutType: prevOutType,
+    pubKeys: pubKeys,
+    redeemScript: redeemScript,
+    scriptType: scriptType,
+    signatures: signatures
+  }
+}
+
+function TransactionBuilder () {
+  this.prevTxMap = {}
+  this.prevOutScripts = {}
+  this.prevOutTypes = {}
+
+  this.inputs = []
+  this.tx = new Transaction()
+}
+
+TransactionBuilder.fromTransaction = function (transaction) {
+  var txb = new TransactionBuilder()
+
+  // Copy other transaction fields
+  txb.tx.version = transaction.version
+  txb.tx.locktime = transaction.locktime
+
+  // Extract/add inputs
+  transaction.ins.forEach(function (txIn) {
+    txb.addInput(txIn.hash, txIn.index, txIn.sequence)
+  })
+
+  // Extract/add outputs
+  transaction.outs.forEach(function (txOut) {
+    txb.addOutput(txOut.script, txOut.value)
+  })
+
+  // Extract/add signatures
+  txb.inputs = transaction.ins.map(function (txIn) {
+    // TODO: remove me after testcase added
+    assert(!Transaction.isCoinbaseHash(txIn.hash), 'coinbase inputs not supported')
+
+    // Ignore empty scripts
+    if (txIn.script.buffer.length === 0) return {}
+
+    return extractInput(txIn)
+  })
+
+  return txb
+}
+
+TransactionBuilder.prototype.addInput = function (prevTx, index, sequence, prevOutScript) {
+  var prevOutHash
+
+  // txId
+  if (typeof prevTx === 'string') {
+    prevOutHash = new Buffer(prevTx, 'hex')
+
+    // TxId hex is big-endian, we want little-endian hash
+    Array.prototype.reverse.call(prevOutHash)
+
+  // Transaction
+  } else if (prevTx instanceof Transaction) {
+    prevOutHash = prevTx.getHash()
+    prevOutScript = prevTx.outs[index].script
+
+  // txHash
+  } else {
+    prevOutHash = prevTx
+  }
+
+  var input = {}
+  if (prevOutScript) {
+    var prevOutType = scripts.classifyOutput(prevOutScript)
+
+    // if we can, extract pubKey information
+    switch (prevOutType) {
+      case 'multisig': {
+        input.pubKeys = prevOutScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
+        break
+      }
+
+      case 'pubkey': {
+        input.pubKeys = prevOutScript.chunks.slice(0, 1).map(ECPubKey.fromBuffer)
+        break
+      }
+    }
+
+    if (prevOutType !== 'scripthash') {
+      input.scriptType = prevOutType
+    }
+
+    input.prevOutScript = prevOutScript
+    input.prevOutType = prevOutType
+  }
+
+  assert(this.inputs.every(function (input2) {
+    if (input2.hashType === undefined) return true
+
+    return input2.hashType & Transaction.SIGHASH_ANYONECANPAY
+  }), 'No, this would invalidate signatures')
+
+  var prevOut = prevOutHash.toString('hex') + ':' + index
+  assert(!(prevOut in this.prevTxMap), 'Transaction is already an input')
+
+  var vin = this.tx.addInput(prevOutHash, index, sequence)
+  this.inputs[vin] = input
+  this.prevTxMap[prevOut] = vin
+
+  return vin
+}
+
+TransactionBuilder.prototype.addOutput = function (scriptPubKey, value) {
+  assert(this.inputs.every(function (input) {
+    if (input.hashType === undefined) return true
+
+    return (input.hashType & 0x1f) === Transaction.SIGHASH_SINGLE
+  }), 'No, this would invalidate signatures')
+
+  return this.tx.addOutput(scriptPubKey, value)
+}
+
+TransactionBuilder.prototype.build = function () {
+  return this.__build(false)
+}
+TransactionBuilder.prototype.buildIncomplete = function () {
+  return this.__build(true)
+}
+
+var canSignTypes = {
+  'pubkeyhash': true,
+  'multisig': true,
+  'pubkey': true
+}
+
+TransactionBuilder.prototype.__build = function (allowIncomplete) {
+  if (!allowIncomplete) {
+    assert(this.tx.ins.length > 0, 'Transaction has no inputs')
+    assert(this.tx.outs.length > 0, 'Transaction has no outputs')
+  }
+
+  var tx = this.tx.clone()
+
+  // Create script signatures from signature meta-data
+  this.inputs.forEach(function (input, index) {
+    var scriptType = input.scriptType
+    var scriptSig
+
+    if (!allowIncomplete) {
+      assert(!!scriptType, 'Transaction is not complete')
+      assert(scriptType in canSignTypes, scriptType + ' not supported')
+      assert(input.signatures, 'Transaction is missing signatures')
+    }
+
+    if (input.signatures) {
+      switch (scriptType) {
+        case 'pubkeyhash': {
+          var pkhSignature = input.signatures[0].toScriptSignature(input.hashType)
+          scriptSig = scripts.pubKeyHashInput(pkhSignature, input.pubKeys[0])
+          break
+        }
+
+        case 'multisig': {
+          // Array.prototype.map is sparse-compatible
+          var msSignatures = input.signatures.map(function (signature) {
+            return signature && signature.toScriptSignature(input.hashType)
+          })
+
+          // fill in blanks with OP_0
+          if (allowIncomplete) {
+            for (var i = 0; i < msSignatures.length; ++i) {
+              if (msSignatures[i]) continue
+
+              msSignatures[i] = ops.OP_0
+            }
+          } else {
+            // Array.prototype.filter returns non-sparse array
+            msSignatures = msSignatures.filter(function (x) { return x })
+          }
+
+          var redeemScript = allowIncomplete ? undefined : input.redeemScript
+          scriptSig = scripts.multisigInput(msSignatures, redeemScript)
+          break
+        }
+
+        case 'pubkey': {
+          var pkSignature = input.signatures[0].toScriptSignature(input.hashType)
+          scriptSig = scripts.pubKeyInput(pkSignature)
+          break
+        }
+      }
+    }
+
+    // did we build a scriptSig?
+    if (scriptSig) {
+      // wrap as scriptHash if necessary
+      if (input.prevOutType === 'scripthash') {
+        scriptSig = scripts.scriptHashInput(scriptSig, input.redeemScript)
+      }
+
+      tx.setInputScript(index, scriptSig)
+    }
+  })
+
+  return tx
+}
+
+TransactionBuilder.prototype.sign = function (index, privKey, redeemScript, hashType) {
+  assert(index in this.inputs, 'No input at index: ' + index)
+  hashType = hashType || Transaction.SIGHASH_ALL
+
+  var input = this.inputs[index]
+  var canSign = input.hashType &&
+    input.prevOutScript &&
+    input.prevOutType &&
+    input.pubKeys &&
+    input.scriptType &&
+    input.signatures
+
+  // are we almost ready to sign?
+  if (canSign) {
+    // if redeemScript was provided, enforce consistency
+    if (redeemScript) {
+      assert.deepEqual(input.redeemScript, redeemScript, 'Inconsistent redeemScript')
+    }
+
+    assert.equal(input.hashType, hashType, 'Inconsistent hashType')
+
+  // no? prepare
+  } else {
+    // must be pay-to-scriptHash?
+    if (redeemScript) {
+      // if we have a prevOutScript, enforce scriptHash equality to the redeemScript
+      if (input.prevOutScript) {
+        assert.equal(input.prevOutType, 'scripthash', 'PrevOutScript must be P2SH')
+
+        var scriptHash = input.prevOutScript.chunks[1]
+        assert.deepEqual(scriptHash, redeemScript.getHash(), 'RedeemScript does not match ' + scriptHash.toString('hex'))
+      }
+
+      var scriptType = scripts.classifyOutput(redeemScript)
+      assert(scriptType in canSignTypes, 'RedeemScript not supported (' + scriptType + ')')
+
+      var pubKeys = []
+      switch (scriptType) {
+        case 'multisig': {
+          pubKeys = redeemScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
+          break
+        }
+
+        case 'pubkeyhash': {
+          var pkh1 = redeemScript.chunks[2]
+          var pkh2 = privKey.pub.getAddress().hash
+
+          assert.deepEqual(pkh1, pkh2, 'privateKey cannot sign for this input')
+          pubKeys = [privKey.pub]
+          break
+        }
+
+        case 'pubkey': {
+          pubKeys = redeemScript.chunks.slice(0, 1).map(ECPubKey.fromBuffer)
+          break
+        }
+      }
+
+      if (!input.prevOutScript) {
+        input.prevOutScript = scripts.scriptHashOutput(redeemScript.getHash())
+        input.prevOutType = 'scripthash'
+      }
+
+      input.pubKeys = pubKeys
+      input.redeemScript = redeemScript
+      input.scriptType = scriptType
+
+    // cannot be pay-to-scriptHash
+    } else {
+      assert.notEqual(input.prevOutType, 'scripthash', 'PrevOutScript is P2SH, missing redeemScript')
+
+      // can we otherwise sign this?
+      if (input.scriptType) {
+        assert(input.pubKeys, input.scriptType + ' not supported')
+
+      // we know nothin' Jon Snow, assume pubKeyHash
+      } else {
+        input.prevOutScript = privKey.pub.getAddress().toOutputScript()
+        input.prevOutType = 'pubkeyhash'
+        input.pubKeys = [privKey.pub]
+        input.scriptType = input.prevOutType
+      }
+    }
+
+    input.hashType = hashType
+    input.signatures = input.signatures || []
+  }
+
+  var signatureScript = input.redeemScript || input.prevOutScript
+  var signatureHash = this.tx.hashForSignature(index, signatureScript, hashType)
+
+  // enforce signature order matches public keys
+  if (input.scriptType === 'multisig' && input.redeemScript && input.signatures.length !== input.pubKeys.length) {
+    // maintain a local copy of unmatched signatures
+    var unmatched = input.signatures.slice()
+
+    input.signatures = input.pubKeys.map(function (pubKey) {
+      var match
+
+      // check for any matching signatures
+      unmatched.some(function (signature, i) {
+        if (!pubKey.verify(signatureHash, signature)) return false
+        match = signature
+
+        // remove matched signature from unmatched
+        unmatched.splice(i, 1)
+
+        return true
+      })
+
+      return match || undefined
+    })
+  }
+
+  // enforce in order signing of public keys
+  assert(input.pubKeys.some(function (pubKey, i) {
+    if (!privKey.pub.Q.equals(pubKey.Q)) return false
+
+    assert(!input.signatures[i], 'Signature already exists')
+    var signature = privKey.sign(signatureHash)
+    input.signatures[i] = signature
+
+    return true
+  }, this), 'privateKey cannot sign for this input')
+}
+
+module.exports = TransactionBuilder
+
+}).call(this,require("buffer").Buffer)
+},{"./ecpubkey":61,"./ecsignature":62,"./opcodes":67,"./script":68,"./scripts":69,"./transaction":70,"assert":5,"buffer":7}],72:[function(require,module,exports){
+(function (Buffer){
+var assert = require('assert')
+var bufferutils = require('./bufferutils')
+var typeForce = require('typeforce')
+var networks = require('./networks')
+var randomBytes = require('randombytes')
+
+var Address = require('./address')
+var HDNode = require('./hdnode')
+var TransactionBuilder = require('./transaction_builder')
+var Script = require('./script')
+
+function Wallet (seed, network) {
+  console.warn('Wallet is deprecated and will be removed in 2.0.0, see #296')
+
+  seed = seed || randomBytes(32)
+  network = network || networks.bitcoin
+
+  // Stored in a closure to make accidental serialization less likely
+  var masterKey = HDNode.fromSeedBuffer(seed, network)
+
+  // HD first-level child derivation method should be hardened
+  // See https://bitcointalk.org/index.php?topic=405179.msg4415254#msg4415254
+  var accountZero = masterKey.deriveHardened(0)
+  var externalAccount = accountZero.derive(0)
+  var internalAccount = accountZero.derive(1)
+
+  this.addresses = []
+  this.changeAddresses = []
+  this.network = network
+  this.unspents = []
+
+  // FIXME: remove in 2.0.0
+  this.unspentMap = {}
+
+  // FIXME: remove in 2.0.0
+  var me = this
+  this.newMasterKey = function (seed) {
+    console.warn('newMasterKey is deprecated, please make a new Wallet instance instead')
+
+    seed = seed || randomBytes(32)
+    masterKey = HDNode.fromSeedBuffer(seed, network)
+
+    accountZero = masterKey.deriveHardened(0)
+    externalAccount = accountZero.derive(0)
+    internalAccount = accountZero.derive(1)
+
+    me.addresses = []
+    me.changeAddresses = []
+
+    me.unspents = []
+    me.unspentMap = {}
+  }
+
+  this.getMasterKey = function () {
+    return masterKey
+  }
+  this.getAccountZero = function () {
+    return accountZero
+  }
+  this.getExternalAccount = function () {
+    return externalAccount
+  }
+  this.getInternalAccount = function () {
+    return internalAccount
+  }
+}
+
+Wallet.prototype.createTransaction = function (to, value, options) {
+  // FIXME: remove in 2.0.0
+  if (typeof options !== 'object') {
+    if (options !== undefined) {
+      console.warn('Non options object parameters are deprecated, use options object instead')
+
+      options = {
+        fixedFee: arguments[2],
+        changeAddress: arguments[3]
+      }
+    }
+  }
+
+  options = options || {}
+
+  assert(value > this.network.dustThreshold, value + ' must be above dust threshold (' + this.network.dustThreshold + ' Satoshis)')
+
+  var changeAddress = options.changeAddress
+  var fixedFee = options.fixedFee
+  var minConf = options.minConf === undefined ? 0 : options.minConf // FIXME: change minConf:1 by default in 2.0.0
+
+  // filter by minConf, then pending and sort by descending value
+  var unspents = this.unspents.filter(function (unspent) {
+    return unspent.confirmations >= minConf
+  }).filter(function (unspent) {
+    return !unspent.pending
+  }).sort(function (o1, o2) {
+    return o2.value - o1.value
+  })
+
+  var accum = 0
+  var addresses = []
+  var subTotal = value
+
+  var txb = new TransactionBuilder()
+  txb.addOutput(to, value)
+
+  for (var i = 0; i < unspents.length; ++i) {
+    var unspent = unspents[i]
+    addresses.push(unspent.address)
+
+    txb.addInput(unspent.txHash, unspent.index)
+
+    var fee = fixedFee === undefined ? estimatePaddedFee(txb.buildIncomplete(), this.network) : fixedFee
+
+    accum += unspent.value
+    subTotal = value + fee
+
+    if (accum >= subTotal) {
+      var change = accum - subTotal
+
+      if (change > this.network.dustThreshold) {
+        txb.addOutput(changeAddress || this.getChangeAddress(), change)
+      }
+
+      break
+    }
+  }
+
+  assert(accum >= subTotal, 'Not enough funds (incl. fee): ' + accum + ' < ' + subTotal)
+
+  return this.signWith(txb, addresses).build()
+}
+
+// FIXME: remove in 2.0.0
+Wallet.prototype.processPendingTx = function (tx) {
+  this.__processTx(tx, true)
+}
+
+// FIXME: remove in 2.0.0
+Wallet.prototype.processConfirmedTx = function (tx) {
+  this.__processTx(tx, false)
+}
+
+// FIXME: remove in 2.0.0
+Wallet.prototype.__processTx = function (tx, isPending) {
+  console.warn('processTransaction is considered harmful, see issue #260 for more information')
+
+  var txId = tx.getId()
+  var txHash = tx.getHash()
+
+  tx.outs.forEach(function (txOut, i) {
+    var address
+
+    try {
+      address = Address.fromOutputScript(txOut.script, this.network).toString()
+    } catch (e) {
+      if (!(e.message.match(/has no matching Address/)))
+        throw e
+    }
+
+    var myAddresses = this.addresses.concat(this.changeAddresses)
+    if (myAddresses.indexOf(address) > -1) {
+      var lookup = txId + ':' + i
+      if (lookup in this.unspentMap) return
+
+      // its unique, add it
+      var unspent = {
+        address: address,
+        confirmations: 0, // no way to determine this without more information
+        index: i,
+        txHash: txHash,
+        txId: txId,
+        value: txOut.value,
+        pending: isPending
+      }
+
+      this.unspentMap[lookup] = unspent
+      this.unspents.push(unspent)
+    }
+  }, this)
+
+  tx.ins.forEach(function (txIn) {
+    // copy and convert to big-endian hex
+    var txInId = bufferutils.reverse(txIn.hash).toString('hex')
+
+    var lookup = txInId + ':' + txIn.index
+    if (!(lookup in this.unspentMap)) return
+
+    var unspent = this.unspentMap[lookup]
+
+    if (isPending) {
+      unspent.pending = true
+      unspent.spent = true
+    } else {
+      delete this.unspentMap[lookup]
+
+      this.unspents = this.unspents.filter(function (unspent2) {
+        return unspent !== unspent2
+      })
+    }
+  }, this)
+}
+
+Wallet.prototype.generateAddress = function () {
+  var k = this.addresses.length
+  var address = this.getExternalAccount().derive(k).getAddress()
+
+  this.addresses.push(address.toString())
+
+  return this.getReceiveAddress()
+}
+
+Wallet.prototype.generateChangeAddress = function () {
+  var k = this.changeAddresses.length
+  var address = this.getInternalAccount().derive(k).getAddress()
+
+  this.changeAddresses.push(address.toString())
+
+  return this.getChangeAddress()
+}
+
+Wallet.prototype.getAddress = function () {
+  if (this.addresses.length === 0) {
+    this.generateAddress()
+  }
+
+  return this.addresses[this.addresses.length - 1]
+}
+
+Wallet.prototype.getBalance = function (minConf) {
+  minConf = minConf || 0
+
+  return this.unspents.filter(function (unspent) {
+    return unspent.confirmations >= minConf
+
+      // FIXME: remove spent filter in 2.0.0
+  }).filter(function (unspent) {
+    return !unspent.spent
+  }).reduce(function (accum, unspent) {
+    return accum + unspent.value
+  }, 0)
+}
+
+Wallet.prototype.getChangeAddress = function () {
+  if (this.changeAddresses.length === 0) {
+    this.generateChangeAddress()
+  }
+
+  return this.changeAddresses[this.changeAddresses.length - 1]
 }
 
-// (public) return + if this > a, - if this < a, 0 if equal
-function bnCompareTo(a) {
-  var r = this.s - a.s
-  if (r != 0) return r
-  var i = this.t
-  r = i - a.t
-  if (r != 0) return (this.s < 0) ? -r : r
-  while (--i >= 0)
-    if ((r = this[i] - a[i]) != 0) return r
-  return 0
+Wallet.prototype.getInternalPrivateKey = function (index) {
+  return this.getInternalAccount().derive(index).privKey
 }
 
-// returns bit length of the integer x
-function nbits(x) {
-  var r = 1,
-    t
-  if ((t = x >>> 16) != 0) {
-    x = t
-    r += 16
+Wallet.prototype.getPrivateKey = function (index) {
+  return this.getExternalAccount().derive(index).privKey
+}
+
+Wallet.prototype.getPrivateKeyForAddress = function (address) {
+  var index
+
+  if ((index = this.addresses.indexOf(address)) > -1) {
+    return this.getPrivateKey(index)
   }
-  if ((t = x >> 8) != 0) {
-    x = t
-    r += 8
+
+  if ((index = this.changeAddresses.indexOf(address)) > -1) {
+    return this.getInternalPrivateKey(index)
   }
-  if ((t = x >> 4) != 0) {
-    x = t
-    r += 4
+
+  assert(false, 'Unknown address. Make sure the address is from the keychain and has been generated')
+}
+
+Wallet.prototype.getUnspentOutputs = function (minConf) {
+  minConf = minConf || 0
+
+  return this.unspents.filter(function (unspent) {
+    return unspent.confirmations >= minConf
+
+      // FIXME: remove spent filter in 2.0.0
+  }).filter(function (unspent) {
+    return !unspent.spent
+  }).map(function (unspent) {
+    return {
+      address: unspent.address,
+      confirmations: unspent.confirmations,
+      index: unspent.index,
+      txId: unspent.txId,
+      value: unspent.value,
+
+      // FIXME: remove in 2.0.0
+      hash: unspent.txId,
+      pending: unspent.pending
+    }
+  })
+}
+
+Wallet.prototype.setUnspentOutputs = function (unspents) {
+  this.unspentMap = {}
+  this.unspents = unspents.map(function (unspent) {
+    // FIXME: remove unspent.hash in 2.0.0
+    var txId = unspent.txId || unspent.hash
+    var index = unspent.index
+
+    // FIXME: remove in 2.0.0
+    if (unspent.hash !== undefined) {
+      console.warn('unspent.hash is deprecated, use unspent.txId instead')
+    }
+
+    // FIXME: remove in 2.0.0
+    if (index === undefined) {
+      console.warn('unspent.outputIndex is deprecated, use unspent.index instead')
+      index = unspent.outputIndex
+    }
+
+    typeForce('String', txId)
+    typeForce('Number', index)
+    typeForce('Number', unspent.value)
+
+    assert.equal(txId.length, 64, 'Expected valid txId, got ' + txId)
+    assert.doesNotThrow(function () {
+      Address.fromBase58Check(unspent.address)
+    }, 'Expected Base58 Address, got ' + unspent.address)
+    assert(isFinite(index), 'Expected finite index, got ' + index)
+
+    // FIXME: remove branch in 2.0.0
+    if (unspent.confirmations !== undefined) {
+      typeForce('Number', unspent.confirmations)
+    }
+
+    var txHash = bufferutils.reverse(new Buffer(txId, 'hex'))
+
+    unspent = {
+      address: unspent.address,
+      confirmations: unspent.confirmations || 0,
+      index: index,
+      txHash: txHash,
+      txId: txId,
+      value: unspent.value,
+
+      // FIXME: remove in 2.0.0
+      pending: unspent.pending || false
+    }
+
+    // FIXME: remove in 2.0.0
+    this.unspentMap[txId + ':' + index] = unspent
+
+    return unspent
+  }, this)
+}
+
+Wallet.prototype.signWith = function (tx, addresses) {
+  addresses.forEach(function (address, i) {
+    var privKey = this.getPrivateKeyForAddress(address)
+
+    tx.sign(i, privKey)
+  }, this)
+
+  return tx
+}
+
+function estimatePaddedFee (tx, network) {
+  var tmpTx = tx.clone()
+  tmpTx.addOutput(Script.EMPTY, network.dustSoftThreshold || 0)
+
+  return network.estimateFee(tmpTx)
+}
+
+// FIXME: 1.0.0 shims, remove in 2.0.0
+Wallet.prototype.getReceiveAddress = Wallet.prototype.getAddress
+Wallet.prototype.createTx = Wallet.prototype.createTransaction
+
+module.exports = Wallet
+
+}).call(this,require("buffer").Buffer)
+},{"./address":54,"./bufferutils":57,"./hdnode":63,"./networks":66,"./script":68,"./transaction_builder":71,"assert":5,"buffer":7,"randombytes":52,"typeforce":53}]},{},[64])(64)
+});</script>
+        <script>bitcoin.networks.shadow = {
+  magicPrefix: '\x19ShadowCash Signed Message:\n',
+  bip32: {
+    public: 0xEE80286A,
+    private: 0xEE8031E8
+  },
+  pubKeyHash: 0x3f,
+  scriptHash: 0x7d,
+  wif: 0xbf,
+  dustThreshold: 0,
+  feePerKb: 1000,
+  estimateFee: function() { return "unused in this app" },
+};
+
+bitcoin.networks.shadowtn = {
+  magicPrefix: '\x19ShadowCash Signed Message:\n',
+  bip32: {
+    public: 0x76C0FDFB,
+    private: 0x76C1077A
+  },
+  pubKeyHash: 0x7f,
+  scriptHash: 0xc4,
+  wif: 0xff,
+  dustThreshold: 0,
+  feePerKb: 1000,
+  estimateFee: function() { return "unused in this app" },
+};
+
+bitcoin.networks.clam = {
+  bip32: {
+    public: 0xa8c26d64,
+    private: 0xa8c17826
+  },
+  pubKeyHash: 0x89,
+  wif: 0x85,
+};
+
+bitcoin.networks.dash = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x4c,
+  scriptHash: 0x10,
+  wif: 0xcc,
+};
+
+bitcoin.networks.game = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x26,
+  scriptHash: 0x05,
+  wif: 0xa6,
+};
+
+bitcoin.networks.namecoin = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x34,
+  //scriptHash: 0x10,
+  wif: 0x80,
+};
+
+bitcoin.networks.peercoin = {
+  bip32: {
+    public: 0x0488b21e,
+    private: 0x0488ade4
+  },
+  pubKeyHash: 0x37,
+  //scriptHash: 0x10,
+  wif: 0xb7,
+};
+
+</script>
+        <script>(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.ethUtil = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+(function (global){
+'use strict';
+
+// compare and isBuffer taken from https://github.com/feross/buffer/blob/680e9e5e488f22aac27599a57dc844a6315928dd/index.js
+// original notice:
+
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
+ * @license  MIT
+ */
+function compare(a, b) {
+  if (a === b) {
+    return 0;
   }
-  if ((t = x >> 2) != 0) {
-    x = t
-    r += 2
+
+  var x = a.length;
+  var y = b.length;
+
+  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i];
+      y = b[i];
+      break;
+    }
   }
-  if ((t = x >> 1) != 0) {
-    x = t
-    r += 1
+
+  if (x < y) {
+    return -1;
+  }
+  if (y < x) {
+    return 1;
   }
-  return r
+  return 0;
 }
-
-// (public) return the number of bits in "this"
-function bnBitLength() {
-  if (this.t <= 0) return 0
-  return this.DB * (this.t - 1) + nbits(this[this.t - 1] ^ (this.s & this.DM))
+function isBuffer(b) {
+  if (global.Buffer && typeof global.Buffer.isBuffer === 'function') {
+    return global.Buffer.isBuffer(b);
+  }
+  return !!(b != null && b._isBuffer);
 }
 
-// (public) return the number of bytes in "this"
-function bnByteLength() {
-  return this.bitLength() >> 3
-}
+// based on node assert, original notice:
 
-// (protected) r = this << n*DB
-function bnpDLShiftTo(n, r) {
-  var i
-  for (i = this.t - 1; i >= 0; --i) r[i + n] = this[i]
-  for (i = n - 1; i >= 0; --i) r[i] = 0
-  r.t = this.t + n
-  r.s = this.s
-}
+// http://wiki.commonjs.org/wiki/Unit_Testing/1.0
+//
+// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
+//
+// Originally from narwhal.js (http://narwhaljs.org)
+// Copyright (c) 2009 Thomas Robinson <280north.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the 'Software'), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-// (protected) r = this >> n*DB
-function bnpDRShiftTo(n, r) {
-  for (var i = n; i < this.t; ++i) r[i - n] = this[i]
-  r.t = Math.max(this.t - n, 0)
-  r.s = this.s
+var util = require('util/');
+var hasOwn = Object.prototype.hasOwnProperty;
+var pSlice = Array.prototype.slice;
+var functionsHaveNames = (function () {
+  return function foo() {}.name === 'foo';
+}());
+function pToString (obj) {
+  return Object.prototype.toString.call(obj);
 }
-
-// (protected) r = this << n
-function bnpLShiftTo(n, r) {
-  var self = this
-  var bs = n % self.DB
-  var cbs = self.DB - bs
-  var bm = (1 << cbs) - 1
-  var ds = Math.floor(n / self.DB),
-    c = (self.s << bs) & self.DM,
-    i
-  for (i = self.t - 1; i >= 0; --i) {
-    r[i + ds + 1] = (self[i] >> cbs) | c
-    c = (self[i] & bm) << bs
+function isView(arrbuf) {
+  if (isBuffer(arrbuf)) {
+    return false;
   }
-  for (i = ds - 1; i >= 0; --i) r[i] = 0
-  r[ds] = c
-  r.t = self.t + ds + 1
-  r.s = self.s
-  r.clamp()
-}
-
-// (protected) r = this >> n
-function bnpRShiftTo(n, r) {
-  var self = this
-  r.s = self.s
-  var ds = Math.floor(n / self.DB)
-  if (ds >= self.t) {
-    r.t = 0
-    return
+  if (typeof global.ArrayBuffer !== 'function') {
+    return false;
   }
-  var bs = n % self.DB
-  var cbs = self.DB - bs
-  var bm = (1 << bs) - 1
-  r[0] = self[ds] >> bs
-  for (var i = ds + 1; i < self.t; ++i) {
-    r[i - ds - 1] |= (self[i] & bm) << cbs
-    r[i - ds] = self[i] >> bs
+  if (typeof ArrayBuffer.isView === 'function') {
+    return ArrayBuffer.isView(arrbuf);
   }
-  if (bs > 0) r[self.t - ds - 1] |= (self.s & bm) << cbs
-  r.t = self.t - ds
-  r.clamp()
-}
-
-// (protected) r = this - a
-function bnpSubTo(a, r) {
-  var self = this
-  var i = 0,
-    c = 0,
-    m = Math.min(a.t, self.t)
-  while (i < m) {
-    c += self[i] - a[i]
-    r[i++] = c & self.DM
-    c >>= self.DB
+  if (!arrbuf) {
+    return false;
   }
-  if (a.t < self.t) {
-    c -= a.s
-    while (i < self.t) {
-      c += self[i]
-      r[i++] = c & self.DM
-      c >>= self.DB
-    }
-    c += self.s
-  } else {
-    c += self.s
-    while (i < a.t) {
-      c -= a[i]
-      r[i++] = c & self.DM
-      c >>= self.DB
-    }
-    c -= a.s
+  if (arrbuf instanceof DataView) {
+    return true;
   }
-  r.s = (c < 0) ? -1 : 0
-  if (c < -1) r[i++] = self.DV + c
-  else if (c > 0) r[i++] = c
-  r.t = i
-  r.clamp()
+  if (arrbuf.buffer && arrbuf.buffer instanceof ArrayBuffer) {
+    return true;
+  }
+  return false;
 }
+// 1. The assert module provides functions that throw
+// AssertionError's when particular conditions are not met. The
+// assert module must conform to the following interface.
 
-// (protected) r = this * a, r != this,a (HAC 14.12)
-// "this" should be the larger one if appropriate.
-function bnpMultiplyTo(a, r) {
-  var x = this.abs(),
-    y = a.abs()
-  var i = x.t
-  r.t = i + y.t
-  while (--i >= 0) r[i] = 0
-  for (i = 0; i < y.t; ++i) r[i + x.t] = x.am(0, y[i], r, i, 0, x.t)
-  r.s = 0
-  r.clamp()
-  if (this.s != a.s) BigInteger.ZERO.subTo(r, r)
-}
+var assert = module.exports = ok;
 
-// (protected) r = this^2, r != this (HAC 14.16)
-function bnpSquareTo(r) {
-  var x = this.abs()
-  var i = r.t = 2 * x.t
-  while (--i >= 0) r[i] = 0
-  for (i = 0; i < x.t - 1; ++i) {
-    var c = x.am(i, x[i], r, 2 * i, 0, 1)
-    if ((r[i + x.t] += x.am(i + 1, 2 * x[i], r, 2 * i + 1, c, x.t - i - 1)) >= x.DV) {
-      r[i + x.t] -= x.DV
-      r[i + x.t + 1] = 1
-    }
-  }
-  if (r.t > 0) r[r.t - 1] += x.am(i, x[i], r, 2 * i, 0, 1)
-  r.s = 0
-  r.clamp()
-}
+// 2. The AssertionError is defined in assert.
+// new assert.AssertionError({ message: message,
+//                             actual: actual,
+//                             expected: expected })
 
-// (protected) divide this by m, quotient and remainder to q, r (HAC 14.20)
-// r != q, this != m.  q or r may be null.
-function bnpDivRemTo(m, q, r) {
-  var self = this
-  var pm = m.abs()
-  if (pm.t <= 0) return
-  var pt = self.abs()
-  if (pt.t < pm.t) {
-    if (q != null) q.fromInt(0)
-    if (r != null) self.copyTo(r)
-    return
+var regex = /\s*function\s+([^\(\s]*)\s*/;
+// based on https://github.com/ljharb/function.prototype.name/blob/adeeeec8bfcc6068b187d7d9fb3d5bb1d3a30899/implementation.js
+function getName(func) {
+  if (!util.isFunction(func)) {
+    return;
   }
-  if (r == null) r = new BigInteger()
-  var y = new BigInteger(),
-    ts = self.s,
-    ms = m.s
-  var nsh = self.DB - nbits(pm[pm.t - 1]); // normalize modulus
-  if (nsh > 0) {
-    pm.lShiftTo(nsh, y)
-    pt.lShiftTo(nsh, r)
-  } else {
-    pm.copyTo(y)
-    pt.copyTo(r)
+  if (functionsHaveNames) {
+    return func.name;
   }
-  var ys = y.t
-  var y0 = y[ys - 1]
-  if (y0 == 0) return
-  var yt = y0 * (1 << self.F1) + ((ys > 1) ? y[ys - 2] >> self.F2 : 0)
-  var d1 = self.FV / yt,
-    d2 = (1 << self.F1) / yt,
-    e = 1 << self.F2
-  var i = r.t,
-    j = i - ys,
-    t = (q == null) ? new BigInteger() : q
-  y.dlShiftTo(j, t)
-  if (r.compareTo(t) >= 0) {
-    r[r.t++] = 1
-    r.subTo(t, r)
+  var str = func.toString();
+  var match = str.match(regex);
+  return match && match[1];
+}
+assert.AssertionError = function AssertionError(options) {
+  this.name = 'AssertionError';
+  this.actual = options.actual;
+  this.expected = options.expected;
+  this.operator = options.operator;
+  if (options.message) {
+    this.message = options.message;
+    this.generatedMessage = false;
+  } else {
+    this.message = getMessage(this);
+    this.generatedMessage = true;
   }
-  BigInteger.ONE.dlShiftTo(ys, t)
-  t.subTo(y, y); // "negative" y so we can replace sub with am later
-  while (y.t < ys) y[y.t++] = 0
-  while (--j >= 0) {
-    // Estimate quotient digit
-    var qd = (r[--i] == y0) ? self.DM : Math.floor(r[i] * d1 + (r[i - 1] + e) * d2)
-    if ((r[i] += y.am(0, qd, r, j, 0, ys)) < qd) { // Try it out
-      y.dlShiftTo(j, t)
-      r.subTo(t, r)
-      while (r[i] < --qd) r.subTo(t, r)
+  var stackStartFunction = options.stackStartFunction || fail;
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, stackStartFunction);
+  } else {
+    // non v8 browsers so we can have a stacktrace
+    var err = new Error();
+    if (err.stack) {
+      var out = err.stack;
+
+      // try to strip useless frames
+      var fn_name = getName(stackStartFunction);
+      var idx = out.indexOf('\n' + fn_name);
+      if (idx >= 0) {
+        // once we have located the function frame
+        // we need to strip out everything before it (and its line)
+        var next_line = out.indexOf('\n', idx + 1);
+        out = out.substring(next_line + 1);
+      }
+
+      this.stack = out;
     }
   }
-  if (q != null) {
-    r.drShiftTo(ys, q)
-    if (ts != ms) BigInteger.ZERO.subTo(q, q)
-  }
-  r.t = ys
-  r.clamp()
-  if (nsh > 0) r.rShiftTo(nsh, r); // Denormalize remainder
-  if (ts < 0) BigInteger.ZERO.subTo(r, r)
-}
+};
+
+// assert.AssertionError instanceof Error
+util.inherits(assert.AssertionError, Error);
 
-// (public) this mod a
-function bnMod(a) {
-  var r = new BigInteger()
-  this.abs()
-    .divRemTo(a, null, r)
-  if (this.s < 0 && r.compareTo(BigInteger.ZERO) > 0) a.subTo(r, r)
-  return r
+function truncate(s, n) {
+  if (typeof s === 'string') {
+    return s.length < n ? s : s.slice(0, n);
+  } else {
+    return s;
+  }
 }
-
-// Modular reduction using "classic" algorithm
-function Classic(m) {
-  this.m = m
+function inspect(something) {
+  if (functionsHaveNames || !util.isFunction(something)) {
+    return util.inspect(something);
+  }
+  var rawname = getName(something);
+  var name = rawname ? ': ' + rawname : '';
+  return '[Function' +  name + ']';
 }
-
-function cConvert(x) {
-  if (x.s < 0 || x.compareTo(this.m) >= 0) return x.mod(this.m)
-  else return x
+function getMessage(self) {
+  return truncate(inspect(self.actual), 128) + ' ' +
+         self.operator + ' ' +
+         truncate(inspect(self.expected), 128);
 }
 
-function cRevert(x) {
-  return x
-}
+// At present only the three keys mentioned above are used and
+// understood by the spec. Implementations or sub modules can pass
+// other keys to the AssertionError's constructor - they will be
+// ignored.
 
-function cReduce(x) {
-  x.divRemTo(this.m, null, x)
-}
+// 3. All of the following functions must throw an AssertionError
+// when a corresponding condition is not met, with a message that
+// may be undefined if not provided.  All assertion methods provide
+// both the actual and expected values to the assertion error for
+// display purposes.
 
-function cMulTo(x, y, r) {
-  x.multiplyTo(y, r)
-  this.reduce(r)
+function fail(actual, expected, message, operator, stackStartFunction) {
+  throw new assert.AssertionError({
+    message: message,
+    actual: actual,
+    expected: expected,
+    operator: operator,
+    stackStartFunction: stackStartFunction
+  });
 }
 
-function cSqrTo(x, r) {
-  x.squareTo(r)
-  this.reduce(r)
-}
+// EXTENSION! allows for well behaved errors defined elsewhere.
+assert.fail = fail;
 
-Classic.prototype.convert = cConvert
-Classic.prototype.revert = cRevert
-Classic.prototype.reduce = cReduce
-Classic.prototype.mulTo = cMulTo
-Classic.prototype.sqrTo = cSqrTo
+// 4. Pure assertion tests whether a value is truthy, as determined
+// by !!guard.
+// assert.ok(guard, message_opt);
+// This statement is equivalent to assert.equal(true, !!guard,
+// message_opt);. To test strictly for the value true, use
+// assert.strictEqual(true, guard, message_opt);.
 
-// (protected) return "-1/this % 2^DB"; useful for Mont. reduction
-// justification:
-//         xy == 1 (mod m)
-//         xy =  1+km
-//   xy(2-xy) = (1+km)(1-km)
-// x[y(2-xy)] = 1-k^2m^2
-// x[y(2-xy)] == 1 (mod m^2)
-// if y is 1/x mod m, then y(2-xy) is 1/x mod m^2
-// should reduce x and y(2-xy) by m^2 at each step to keep size bounded.
-// JS multiply "overflows" differently from C/C++, so care is needed here.
-function bnpInvDigit() {
-  if (this.t < 1) return 0
-  var x = this[0]
-  if ((x & 1) == 0) return 0
-  var y = x & 3; // y == 1/x mod 2^2
-  y = (y * (2 - (x & 0xf) * y)) & 0xf; // y == 1/x mod 2^4
-  y = (y * (2 - (x & 0xff) * y)) & 0xff; // y == 1/x mod 2^8
-  y = (y * (2 - (((x & 0xffff) * y) & 0xffff))) & 0xffff; // y == 1/x mod 2^16
-  // last step - calculate inverse mod DV directly
-  // assumes 16 < DB <= 32 and assumes ability to handle 48-bit ints
-  y = (y * (2 - x * y % this.DV)) % this.DV; // y == 1/x mod 2^dbits
-  // we really want the negative inverse, and -DV < y < DV
-  return (y > 0) ? this.DV - y : -y
+function ok(value, message) {
+  if (!value) fail(value, true, message, '==', assert.ok);
 }
+assert.ok = ok;
 
-// Montgomery reduction
-function Montgomery(m) {
-  this.m = m
-  this.mp = m.invDigit()
-  this.mpl = this.mp & 0x7fff
-  this.mph = this.mp >> 15
-  this.um = (1 << (m.DB - 15)) - 1
-  this.mt2 = 2 * m.t
-}
+// 5. The equality assertion tests shallow, coercive equality with
+// ==.
+// assert.equal(actual, expected, message_opt);
 
-// xR mod m
-function montConvert(x) {
-  var r = new BigInteger()
-  x.abs()
-    .dlShiftTo(this.m.t, r)
-  r.divRemTo(this.m, null, r)
-  if (x.s < 0 && r.compareTo(BigInteger.ZERO) > 0) this.m.subTo(r, r)
-  return r
-}
+assert.equal = function equal(actual, expected, message) {
+  if (actual != expected) fail(actual, expected, message, '==', assert.equal);
+};
 
-// x/R mod m
-function montRevert(x) {
-  var r = new BigInteger()
-  x.copyTo(r)
-  this.reduce(r)
-  return r
-}
+// 6. The non-equality assertion tests for whether two objects are not equal
+// with != assert.notEqual(actual, expected, message_opt);
 
-// x = x/R mod m (HAC 14.32)
-function montReduce(x) {
-  while (x.t <= this.mt2) // pad x so am has enough room later
-    x[x.t++] = 0
-  for (var i = 0; i < this.m.t; ++i) {
-    // faster way of calculating u0 = x[i]*mp mod DV
-    var j = x[i] & 0x7fff
-    var u0 = (j * this.mpl + (((j * this.mph + (x[i] >> 15) * this.mpl) & this.um) << 15)) & x.DM
-    // use am to combine the multiply-shift-add into one call
-    j = i + this.m.t
-    x[j] += this.m.am(0, u0, x, i, 0, this.m.t)
-    // propagate carry
-    while (x[j] >= x.DV) {
-      x[j] -= x.DV
-      x[++j]++
-    }
+assert.notEqual = function notEqual(actual, expected, message) {
+  if (actual == expected) {
+    fail(actual, expected, message, '!=', assert.notEqual);
   }
-  x.clamp()
-  x.drShiftTo(this.m.t, x)
-  if (x.compareTo(this.m) >= 0) x.subTo(this.m, x)
-}
+};
 
-// r = "x^2/R mod m"; x != r
-function montSqrTo(x, r) {
-  x.squareTo(r)
-  this.reduce(r)
-}
+// 7. The equivalence assertion tests a deep equality relation.
+// assert.deepEqual(actual, expected, message_opt);
 
-// r = "xy/R mod m"; x,y != r
-function montMulTo(x, y, r) {
-  x.multiplyTo(y, r)
-  this.reduce(r)
-}
+assert.deepEqual = function deepEqual(actual, expected, message) {
+  if (!_deepEqual(actual, expected, false)) {
+    fail(actual, expected, message, 'deepEqual', assert.deepEqual);
+  }
+};
 
-Montgomery.prototype.convert = montConvert
-Montgomery.prototype.revert = montRevert
-Montgomery.prototype.reduce = montReduce
-Montgomery.prototype.mulTo = montMulTo
-Montgomery.prototype.sqrTo = montSqrTo
+assert.deepStrictEqual = function deepStrictEqual(actual, expected, message) {
+  if (!_deepEqual(actual, expected, true)) {
+    fail(actual, expected, message, 'deepStrictEqual', assert.deepStrictEqual);
+  }
+};
 
-// (protected) true iff this is even
-function bnpIsEven() {
-  return ((this.t > 0) ? (this[0] & 1) : this.s) == 0
-}
+function _deepEqual(actual, expected, strict, memos) {
+  // 7.1. All identical values are equivalent, as determined by ===.
+  if (actual === expected) {
+    return true;
+  } else if (isBuffer(actual) && isBuffer(expected)) {
+    return compare(actual, expected) === 0;
 
-// (protected) this^e, e < 2^32, doing sqr and mul with "r" (HAC 14.79)
-function bnpExp(e, z) {
-  if (e > 0xffffffff || e < 1) return BigInteger.ONE
-  var r = new BigInteger(),
-    r2 = new BigInteger(),
-    g = z.convert(this),
-    i = nbits(e) - 1
-  g.copyTo(r)
-  while (--i >= 0) {
-    z.sqrTo(r, r2)
-    if ((e & (1 << i)) > 0) z.mulTo(r2, g, r)
-    else {
-      var t = r
-      r = r2
-      r2 = t
-    }
-  }
-  return z.revert(r)
-}
+  // 7.2. If the expected value is a Date object, the actual value is
+  // equivalent if it is also a Date object that refers to the same time.
+  } else if (util.isDate(actual) && util.isDate(expected)) {
+    return actual.getTime() === expected.getTime();
 
-// (public) this^e % m, 0 <= e < 2^32
-function bnModPowInt(e, m) {
-  var z
-  if (e < 256 || m.isEven()) z = new Classic(m)
-  else z = new Montgomery(m)
-  return this.exp(e, z)
-}
+  // 7.3 If the expected value is a RegExp object, the actual value is
+  // equivalent if it is also a RegExp object with the same source and
+  // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
+  } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
+    return actual.source === expected.source &&
+           actual.global === expected.global &&
+           actual.multiline === expected.multiline &&
+           actual.lastIndex === expected.lastIndex &&
+           actual.ignoreCase === expected.ignoreCase;
 
-// protected
-proto.copyTo = bnpCopyTo
-proto.fromInt = bnpFromInt
-proto.fromString = bnpFromString
-proto.clamp = bnpClamp
-proto.dlShiftTo = bnpDLShiftTo
-proto.drShiftTo = bnpDRShiftTo
-proto.lShiftTo = bnpLShiftTo
-proto.rShiftTo = bnpRShiftTo
-proto.subTo = bnpSubTo
-proto.multiplyTo = bnpMultiplyTo
-proto.squareTo = bnpSquareTo
-proto.divRemTo = bnpDivRemTo
-proto.invDigit = bnpInvDigit
-proto.isEven = bnpIsEven
-proto.exp = bnpExp
+  // 7.4. Other pairs that do not both pass typeof value == 'object',
+  // equivalence is determined by ==.
+  } else if ((actual === null || typeof actual !== 'object') &&
+             (expected === null || typeof expected !== 'object')) {
+    return strict ? actual === expected : actual == expected;
+
+  // If both values are instances of typed arrays, wrap their underlying
+  // ArrayBuffers in a Buffer each to increase performance
+  // This optimization requires the arrays to have the same type as checked by
+  // Object.prototype.toString (aka pToString). Never perform binary
+  // comparisons for Float*Arrays, though, since e.g. +0 === -0 but their
+  // bit patterns are not identical.
+  } else if (isView(actual) && isView(expected) &&
+             pToString(actual) === pToString(expected) &&
+             !(actual instanceof Float32Array ||
+               actual instanceof Float64Array)) {
+    return compare(new Uint8Array(actual.buffer),
+                   new Uint8Array(expected.buffer)) === 0;
 
-// public
-proto.toString = bnToString
-proto.negate = bnNegate
-proto.abs = bnAbs
-proto.compareTo = bnCompareTo
-proto.bitLength = bnBitLength
-proto.byteLength = bnByteLength
-proto.mod = bnMod
-proto.modPowInt = bnModPowInt
+  // 7.5 For all other Object pairs, including Array objects, equivalence is
+  // determined by having the same number of owned properties (as verified
+  // with Object.prototype.hasOwnProperty.call), the same set of keys
+  // (although not necessarily the same order), equivalent values for every
+  // corresponding key, and an identical 'prototype' property. Note: this
+  // accounts for both named and indexed properties on Arrays.
+  } else if (isBuffer(actual) !== isBuffer(expected)) {
+    return false;
+  } else {
+    memos = memos || {actual: [], expected: []};
+
+    var actualIndex = memos.actual.indexOf(actual);
+    if (actualIndex !== -1) {
+      if (actualIndex === memos.expected.indexOf(expected)) {
+        return true;
+      }
+    }
 
-// (public)
-function bnClone() {
-  var r = new BigInteger()
-  this.copyTo(r)
-  return r
-}
+    memos.actual.push(actual);
+    memos.expected.push(expected);
 
-// (public) return value as integer
-function bnIntValue() {
-  if (this.s < 0) {
-    if (this.t == 1) return this[0] - this.DV
-    else if (this.t == 0) return -1
-  } else if (this.t == 1) return this[0]
-  else if (this.t == 0) return 0
-  // assumes 16 < DB < 32
-  return ((this[1] & ((1 << (32 - this.DB)) - 1)) << this.DB) | this[0]
+    return objEquiv(actual, expected, strict, memos);
+  }
 }
 
-// (public) return value as byte
-function bnByteValue() {
-  return (this.t == 0) ? this.s : (this[0] << 24) >> 24
+function isArguments(object) {
+  return Object.prototype.toString.call(object) == '[object Arguments]';
 }
 
-// (public) return value as short (assumes DB>=16)
-function bnShortValue() {
-  return (this.t == 0) ? this.s : (this[0] << 16) >> 16
+function objEquiv(a, b, strict, actualVisitedObjects) {
+  if (a === null || a === undefined || b === null || b === undefined)
+    return false;
+  // if one is a primitive, the other must be same
+  if (util.isPrimitive(a) || util.isPrimitive(b))
+    return a === b;
+  if (strict && Object.getPrototypeOf(a) !== Object.getPrototypeOf(b))
+    return false;
+  var aIsArgs = isArguments(a);
+  var bIsArgs = isArguments(b);
+  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
+    return false;
+  if (aIsArgs) {
+    a = pSlice.call(a);
+    b = pSlice.call(b);
+    return _deepEqual(a, b, strict);
+  }
+  var ka = objectKeys(a);
+  var kb = objectKeys(b);
+  var key, i;
+  // having the same number of owned properties (keys incorporates
+  // hasOwnProperty)
+  if (ka.length !== kb.length)
+    return false;
+  //the same set of keys (although not necessarily the same order),
+  ka.sort();
+  kb.sort();
+  //~~~cheap key test
+  for (i = ka.length - 1; i >= 0; i--) {
+    if (ka[i] !== kb[i])
+      return false;
+  }
+  //equivalent values for every corresponding key, and
+  //~~~possibly expensive deep test
+  for (i = ka.length - 1; i >= 0; i--) {
+    key = ka[i];
+    if (!_deepEqual(a[key], b[key], strict, actualVisitedObjects))
+      return false;
+  }
+  return true;
 }
 
-// (protected) return x s.t. r^x < DV
-function bnpChunkSize(r) {
-  return Math.floor(Math.LN2 * this.DB / Math.log(r))
-}
+// 8. The non-equivalence assertion tests for any deep inequality.
+// assert.notDeepEqual(actual, expected, message_opt);
 
-// (public) 0 if this == 0, 1 if this > 0
-function bnSigNum() {
-  if (this.s < 0) return -1
-  else if (this.t <= 0 || (this.t == 1 && this[0] <= 0)) return 0
-  else return 1
-}
+assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
+  if (_deepEqual(actual, expected, false)) {
+    fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
+  }
+};
 
-// (protected) convert to radix string
-function bnpToRadix(b) {
-  if (b == null) b = 10
-  if (this.signum() == 0 || b < 2 || b > 36) return "0"
-  var cs = this.chunkSize(b)
-  var a = Math.pow(b, cs)
-  var d = nbv(a),
-    y = new BigInteger(),
-    z = new BigInteger(),
-    r = ""
-  this.divRemTo(d, y, z)
-  while (y.signum() > 0) {
-    r = (a + z.intValue())
-      .toString(b)
-      .substr(1) + r
-    y.divRemTo(d, y, z)
+assert.notDeepStrictEqual = notDeepStrictEqual;
+function notDeepStrictEqual(actual, expected, message) {
+  if (_deepEqual(actual, expected, true)) {
+    fail(actual, expected, message, 'notDeepStrictEqual', notDeepStrictEqual);
   }
-  return z.intValue()
-    .toString(b) + r
 }
 
-// (protected) convert from radix string
-function bnpFromRadix(s, b) {
-  var self = this
-  self.fromInt(0)
-  if (b == null) b = 10
-  var cs = self.chunkSize(b)
-  var d = Math.pow(b, cs),
-    mi = false,
-    j = 0,
-    w = 0
-  for (var i = 0; i < s.length; ++i) {
-    var x = intAt(s, i)
-    if (x < 0) {
-      if (s.charAt(i) == "-" && self.signum() == 0) mi = true
-      continue
-    }
-    w = b * w + x
-    if (++j >= cs) {
-      self.dMultiply(d)
-      self.dAddOffset(w, 0)
-      j = 0
-      w = 0
-    }
+
+// 9. The strict equality assertion tests strict equality, as determined by ===.
+// assert.strictEqual(actual, expected, message_opt);
+
+assert.strictEqual = function strictEqual(actual, expected, message) {
+  if (actual !== expected) {
+    fail(actual, expected, message, '===', assert.strictEqual);
   }
-  if (j > 0) {
-    self.dMultiply(Math.pow(b, j))
-    self.dAddOffset(w, 0)
+};
+
+// 10. The strict non-equality assertion tests for strict inequality, as
+// determined by !==.  assert.notStrictEqual(actual, expected, message_opt);
+
+assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
+  if (actual === expected) {
+    fail(actual, expected, message, '!==', assert.notStrictEqual);
   }
-  if (mi) BigInteger.ZERO.subTo(self, self)
-}
+};
 
-// (protected) alternate constructor
-function bnpFromNumber(a, b, c) {
-  var self = this
-  if ("number" == typeof b) {
-    // new BigInteger(int,int,RNG)
-    if (a < 2) self.fromInt(1)
-    else {
-      self.fromNumber(a, c)
-      if (!self.testBit(a - 1)) // force MSB set
-        self.bitwiseTo(BigInteger.ONE.shiftLeft(a - 1), op_or, self)
-      if (self.isEven()) self.dAddOffset(1, 0); // force odd
-      while (!self.isProbablePrime(b)) {
-        self.dAddOffset(2, 0)
-        if (self.bitLength() > a) self.subTo(BigInteger.ONE.shiftLeft(a - 1), self)
-      }
-    }
-  } else {
-    // new BigInteger(int,RNG)
-    var x = new Array(),
-      t = a & 7
-    x.length = (a >> 3) + 1
-    b.nextBytes(x)
-    if (t > 0) x[0] &= ((1 << t) - 1)
-    else x[0] = 0
-    self.fromString(x, 256)
+function expectedException(actual, expected) {
+  if (!actual || !expected) {
+    return false;
   }
-}
 
-// (public) convert to bigendian byte array
-function bnToByteArray() {
-  var self = this
-  var i = self.t,
-    r = new Array()
-  r[0] = self.s
-  var p = self.DB - (i * self.DB) % 8,
-    d, k = 0
-  if (i-- > 0) {
-    if (p < self.DB && (d = self[i] >> p) != (self.s & self.DM) >> p)
-      r[k++] = d | (self.s << (self.DB - p))
-    while (i >= 0) {
-      if (p < 8) {
-        d = (self[i] & ((1 << p) - 1)) << (8 - p)
-        d |= self[--i] >> (p += self.DB - 8)
-      } else {
-        d = (self[i] >> (p -= 8)) & 0xff
-        if (p <= 0) {
-          p += self.DB
-          --i
-        }
-      }
-      if ((d & 0x80) != 0) d |= -256
-      if (k === 0 && (self.s & 0x80) != (d & 0x80))++k
-      if (k > 0 || d != self.s) r[k++] = d
+  if (Object.prototype.toString.call(expected) == '[object RegExp]') {
+    return expected.test(actual);
+  }
+
+  try {
+    if (actual instanceof expected) {
+      return true;
     }
+  } catch (e) {
+    // Ignore.  The instanceof check doesn't work for arrow functions.
   }
-  return r
-}
 
-function bnEquals(a) {
-  return (this.compareTo(a) == 0)
+  if (Error.isPrototypeOf(expected)) {
+    return false;
+  }
+
+  return expected.call({}, actual) === true;
 }
 
-function bnMin(a) {
-  return (this.compareTo(a) < 0) ? this : a
+function _tryBlock(block) {
+  var error;
+  try {
+    block();
+  } catch (e) {
+    error = e;
+  }
+  return error;
 }
 
-function bnMax(a) {
-  return (this.compareTo(a) > 0) ? this : a
+function _throws(shouldThrow, block, expected, message) {
+  var actual;
+
+  if (typeof block !== 'function') {
+    throw new TypeError('"block" argument must be a function');
+  }
+
+  if (typeof expected === 'string') {
+    message = expected;
+    expected = null;
+  }
+
+  actual = _tryBlock(block);
+
+  message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
+            (message ? ' ' + message : '.');
+
+  if (shouldThrow && !actual) {
+    fail(actual, expected, 'Missing expected exception' + message);
+  }
+
+  var userProvidedMessage = typeof message === 'string';
+  var isUnwantedException = !shouldThrow && util.isError(actual);
+  var isUnexpectedException = !shouldThrow && actual && !expected;
+
+  if ((isUnwantedException &&
+      userProvidedMessage &&
+      expectedException(actual, expected)) ||
+      isUnexpectedException) {
+    fail(actual, expected, 'Got unwanted exception' + message);
+  }
+
+  if ((shouldThrow && actual && expected &&
+      !expectedException(actual, expected)) || (!shouldThrow && actual)) {
+    throw actual;
+  }
 }
 
-// (protected) r = this op a (bitwise)
-function bnpBitwiseTo(a, op, r) {
-  var self = this
-  var i, f, m = Math.min(a.t, self.t)
-  for (i = 0; i < m; ++i) r[i] = op(self[i], a[i])
-  if (a.t < self.t) {
-    f = a.s & self.DM
-    for (i = m; i < self.t; ++i) r[i] = op(self[i], f)
-    r.t = self.t
-  } else {
-    f = self.s & self.DM
-    for (i = m; i < a.t; ++i) r[i] = op(f, a[i])
-    r.t = a.t
+// 11. Expected to throw an error:
+// assert.throws(block, Error_opt, message_opt);
+
+assert.throws = function(block, /*optional*/error, /*optional*/message) {
+  _throws(true, block, error, message);
+};
+
+// EXTENSION! This is annoying to write outside this module.
+assert.doesNotThrow = function(block, /*optional*/error, /*optional*/message) {
+  _throws(false, block, error, message);
+};
+
+assert.ifError = function(err) { if (err) throw err; };
+
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) {
+    if (hasOwn.call(obj, key)) keys.push(key);
   }
-  r.s = op(self.s, a.s)
-  r.clamp()
-}
+  return keys;
+};
 
-// (public) this & a
-function op_and(x, y) {
-  return x & y
-}
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"util/":30}],2:[function(require,module,exports){
+'use strict'
 
-function bnAnd(a) {
-  var r = new BigInteger()
-  this.bitwiseTo(a, op_and, r)
-  return r
-}
+exports.byteLength = byteLength
+exports.toByteArray = toByteArray
+exports.fromByteArray = fromByteArray
 
-// (public) this | a
-function op_or(x, y) {
-  return x | y
-}
+var lookup = []
+var revLookup = []
+var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
 
-function bnOr(a) {
-  var r = new BigInteger()
-  this.bitwiseTo(a, op_or, r)
-  return r
+var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+for (var i = 0, len = code.length; i < len; ++i) {
+  lookup[i] = code[i]
+  revLookup[code.charCodeAt(i)] = i
 }
 
-// (public) this ^ a
-function op_xor(x, y) {
-  return x ^ y
-}
+revLookup['-'.charCodeAt(0)] = 62
+revLookup['_'.charCodeAt(0)] = 63
 
-function bnXor(a) {
-  var r = new BigInteger()
-  this.bitwiseTo(a, op_xor, r)
-  return r
+function placeHoldersCount (b64) {
+  var len = b64.length
+  if (len % 4 > 0) {
+    throw new Error('Invalid string. Length must be a multiple of 4')
+  }
+
+  // the number of equal signs (place holders)
+  // if there are two placeholders, than the two characters before it
+  // represent one byte
+  // if there is only one, then the three characters before it represent 2 bytes
+  // this is just a cheap hack to not do indexOf twice
+  return b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0
 }
 
-// (public) this & ~a
-function op_andnot(x, y) {
-  return x & ~y
+function byteLength (b64) {
+  // base64 is 4/3 + up to two characters of the original data
+  return b64.length * 3 / 4 - placeHoldersCount(b64)
 }
 
-function bnAndNot(a) {
-  var r = new BigInteger()
-  this.bitwiseTo(a, op_andnot, r)
-  return r
+function toByteArray (b64) {
+  var i, j, l, tmp, placeHolders, arr
+  var len = b64.length
+  placeHolders = placeHoldersCount(b64)
+
+  arr = new Arr(len * 3 / 4 - placeHolders)
+
+  // if there are placeholders, only get up to the last complete 4 chars
+  l = placeHolders > 0 ? len - 4 : len
+
+  var L = 0
+
+  for (i = 0, j = 0; i < l; i += 4, j += 3) {
+    tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)]
+    arr[L++] = (tmp >> 16) & 0xFF
+    arr[L++] = (tmp >> 8) & 0xFF
+    arr[L++] = tmp & 0xFF
+  }
+
+  if (placeHolders === 2) {
+    tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4)
+    arr[L++] = tmp & 0xFF
+  } else if (placeHolders === 1) {
+    tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2)
+    arr[L++] = (tmp >> 8) & 0xFF
+    arr[L++] = tmp & 0xFF
+  }
+
+  return arr
 }
 
-// (public) ~this
-function bnNot() {
-  var r = new BigInteger()
-  for (var i = 0; i < this.t; ++i) r[i] = this.DM & ~this[i]
-  r.t = this.t
-  r.s = ~this.s
-  return r
+function tripletToBase64 (num) {
+  return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F]
 }
 
-// (public) this << n
-function bnShiftLeft(n) {
-  var r = new BigInteger()
-  if (n < 0) this.rShiftTo(-n, r)
-  else this.lShiftTo(n, r)
-  return r
+function encodeChunk (uint8, start, end) {
+  var tmp
+  var output = []
+  for (var i = start; i < end; i += 3) {
+    tmp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
+    output.push(tripletToBase64(tmp))
+  }
+  return output.join('')
 }
 
-// (public) this >> n
-function bnShiftRight(n) {
-  var r = new BigInteger()
-  if (n < 0) this.lShiftTo(-n, r)
-  else this.rShiftTo(n, r)
-  return r
+function fromByteArray (uint8) {
+  var tmp
+  var len = uint8.length
+  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
+  var output = ''
+  var parts = []
+  var maxChunkLength = 16383 // must be multiple of 3
+
+  // go through the array every three bytes, we'll deal with trailing stuff later
+  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
+    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
+  }
+
+  // pad the end with zeros, but make sure to not forget the extra bytes
+  if (extraBytes === 1) {
+    tmp = uint8[len - 1]
+    output += lookup[tmp >> 2]
+    output += lookup[(tmp << 4) & 0x3F]
+    output += '=='
+  } else if (extraBytes === 2) {
+    tmp = (uint8[len - 2] << 8) + (uint8[len - 1])
+    output += lookup[tmp >> 10]
+    output += lookup[(tmp >> 4) & 0x3F]
+    output += lookup[(tmp << 2) & 0x3F]
+    output += '='
+  }
+
+  parts.push(output)
+
+  return parts.join('')
 }
 
-// return index of lowest 1-bit in x, x < 2^31
-function lbit(x) {
-  if (x == 0) return -1
-  var r = 0
-  if ((x & 0xffff) == 0) {
-    x >>= 16
-    r += 16
+},{}],3:[function(require,module,exports){
+
+},{}],4:[function(require,module,exports){
+(function (global){
+'use strict';
+
+var buffer = require('buffer');
+var Buffer = buffer.Buffer;
+var SlowBuffer = buffer.SlowBuffer;
+var MAX_LEN = buffer.kMaxLength || 2147483647;
+exports.alloc = function alloc(size, fill, encoding) {
+  if (typeof Buffer.alloc === 'function') {
+    return Buffer.alloc(size, fill, encoding);
   }
-  if ((x & 0xff) == 0) {
-    x >>= 8
-    r += 8
+  if (typeof encoding === 'number') {
+    throw new TypeError('encoding must not be number');
   }
-  if ((x & 0xf) == 0) {
-    x >>= 4
-    r += 4
+  if (typeof size !== 'number') {
+    throw new TypeError('size must be a number');
   }
-  if ((x & 3) == 0) {
-    x >>= 2
-    r += 2
+  if (size > MAX_LEN) {
+    throw new RangeError('size is too large');
   }
-  if ((x & 1) == 0)++r
-  return r
+  var enc = encoding;
+  var _fill = fill;
+  if (_fill === undefined) {
+    enc = undefined;
+    _fill = 0;
+  }
+  var buf = new Buffer(size);
+  if (typeof _fill === 'string') {
+    var fillBuf = new Buffer(_fill, enc);
+    var flen = fillBuf.length;
+    var i = -1;
+    while (++i < size) {
+      buf[i] = fillBuf[i % flen];
+    }
+  } else {
+    buf.fill(_fill);
+  }
+  return buf;
 }
-
-// (public) returns index of lowest 1-bit (or -1 if none)
-function bnGetLowestSetBit() {
-  for (var i = 0; i < this.t; ++i)
-    if (this[i] != 0) return i * this.DB + lbit(this[i])
-  if (this.s < 0) return this.t * this.DB
-  return -1
+exports.allocUnsafe = function allocUnsafe(size) {
+  if (typeof Buffer.allocUnsafe === 'function') {
+    return Buffer.allocUnsafe(size);
+  }
+  if (typeof size !== 'number') {
+    throw new TypeError('size must be a number');
+  }
+  if (size > MAX_LEN) {
+    throw new RangeError('size is too large');
+  }
+  return new Buffer(size);
 }
+exports.from = function from(value, encodingOrOffset, length) {
+  if (typeof Buffer.from === 'function' && (!global.Uint8Array || Uint8Array.from !== Buffer.from)) {
+    return Buffer.from(value, encodingOrOffset, length);
+  }
+  if (typeof value === 'number') {
+    throw new TypeError('"value" argument must not be a number');
+  }
+  if (typeof value === 'string') {
+    return new Buffer(value, encodingOrOffset);
+  }
+  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
+    var offset = encodingOrOffset;
+    if (arguments.length === 1) {
+      return new Buffer(value);
+    }
+    if (typeof offset === 'undefined') {
+      offset = 0;
+    }
+    var len = length;
+    if (typeof len === 'undefined') {
+      len = value.byteLength - offset;
+    }
+    if (offset >= value.byteLength) {
+      throw new RangeError('\'offset\' is out of bounds');
+    }
+    if (len > value.byteLength - offset) {
+      throw new RangeError('\'length\' is out of bounds');
+    }
+    return new Buffer(value.slice(offset, offset + len));
+  }
+  if (Buffer.isBuffer(value)) {
+    var out = new Buffer(value.length);
+    value.copy(out, 0, 0, value.length);
+    return out;
+  }
+  if (value) {
+    if (Array.isArray(value) || (typeof ArrayBuffer !== 'undefined' && value.buffer instanceof ArrayBuffer) || 'length' in value) {
+      return new Buffer(value);
+    }
+    if (value.type === 'Buffer' && Array.isArray(value.data)) {
+      return new Buffer(value.data);
+    }
+  }
 
-// return number of 1 bits in x
-function cbit(x) {
-  var r = 0
-  while (x != 0) {
-    x &= x - 1
-    ++r
+  throw new TypeError('First argument must be a string, Buffer, ' + 'ArrayBuffer, Array, or array-like object.');
+}
+exports.allocUnsafeSlow = function allocUnsafeSlow(size) {
+  if (typeof Buffer.allocUnsafeSlow === 'function') {
+    return Buffer.allocUnsafeSlow(size);
   }
-  return r
+  if (typeof size !== 'number') {
+    throw new TypeError('size must be a number');
+  }
+  if (size >= MAX_LEN) {
+    throw new RangeError('size is too large');
+  }
+  return new SlowBuffer(size);
 }
 
-// (public) return number of set bits
-function bnBitCount() {
-  var r = 0,
-    x = this.s & this.DM
-  for (var i = 0; i < this.t; ++i) r += cbit(this[i] ^ x)
-  return r
-}
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"buffer":5}],5:[function(require,module,exports){
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
 
-// (public) true iff nth bit is set
-function bnTestBit(n) {
-  var j = Math.floor(n / this.DB)
-  if (j >= this.t) return (this.s != 0)
-  return ((this[j] & (1 << (n % this.DB))) != 0)
-}
+'use strict'
 
-// (protected) this op (1<<n)
-function bnpChangeBit(n, op) {
-  var r = BigInteger.ONE.shiftLeft(n)
-  this.bitwiseTo(r, op, r)
-  return r
-}
+var base64 = require('base64-js')
+var ieee754 = require('ieee754')
 
-// (public) this | (1<<n)
-function bnSetBit(n) {
-  return this.changeBit(n, op_or)
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+
+var K_MAX_LENGTH = 0x7fffffff
+exports.kMaxLength = K_MAX_LENGTH
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Print warning and recommend using `buffer` v4.x which has an Object
+ *               implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * We report that the browser does not support typed arrays if the are not subclassable
+ * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
+ * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
+ * for __proto__ and has a buggy typed array implementation.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
+
+if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
+    typeof console.error === 'function') {
+  console.error(
+    'This browser lacks typed array (Uint8Array) support which is required by ' +
+    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
+  )
 }
 
-// (public) this & ~(1<<n)
-function bnClearBit(n) {
-  return this.changeBit(n, op_andnot)
+function typedArraySupport () {
+  // Can typed array instances can be augmented?
+  try {
+    var arr = new Uint8Array(1)
+    arr.__proto__ = {__proto__: Uint8Array.prototype, foo: function () { return 42 }}
+    return arr.foo() === 42
+  } catch (e) {
+    return false
+  }
 }
 
-// (public) this ^ (1<<n)
-function bnFlipBit(n) {
-  return this.changeBit(n, op_xor)
+function createBuffer (length) {
+  if (length > K_MAX_LENGTH) {
+    throw new RangeError('Invalid typed array length')
+  }
+  // Return an augmented `Uint8Array` instance
+  var buf = new Uint8Array(length)
+  buf.__proto__ = Buffer.prototype
+  return buf
 }
 
-// (protected) r = this + a
-function bnpAddTo(a, r) {
-  var self = this
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
 
-  var i = 0,
-    c = 0,
-    m = Math.min(a.t, self.t)
-  while (i < m) {
-    c += self[i] + a[i]
-    r[i++] = c & self.DM
-    c >>= self.DB
-  }
-  if (a.t < self.t) {
-    c += a.s
-    while (i < self.t) {
-      c += self[i]
-      r[i++] = c & self.DM
-      c >>= self.DB
-    }
-    c += self.s
-  } else {
-    c += self.s
-    while (i < a.t) {
-      c += a[i]
-      r[i++] = c & self.DM
-      c >>= self.DB
+function Buffer (arg, encodingOrOffset, length) {
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new Error(
+        'If encoding is specified then the first argument must be a string'
+      )
     }
-    c += a.s
+    return allocUnsafe(arg)
   }
-  r.s = (c < 0) ? -1 : 0
-  if (c > 0) r[i++] = c
-  else if (c < -1) r[i++] = self.DV + c
-  r.t = i
-  r.clamp()
+  return from(arg, encodingOrOffset, length)
 }
 
-// (public) this + a
-function bnAdd(a) {
-  var r = new BigInteger()
-  this.addTo(a, r)
-  return r
+// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
+if (typeof Symbol !== 'undefined' && Symbol.species &&
+    Buffer[Symbol.species] === Buffer) {
+  Object.defineProperty(Buffer, Symbol.species, {
+    value: null,
+    configurable: true,
+    enumerable: false,
+    writable: false
+  })
 }
 
-// (public) this - a
-function bnSubtract(a) {
-  var r = new BigInteger()
-  this.subTo(a, r)
-  return r
+Buffer.poolSize = 8192 // not used by this implementation
+
+function from (value, encodingOrOffset, length) {
+  if (typeof value === 'number') {
+    throw new TypeError('"value" argument must not be a number')
+  }
+
+  if (value instanceof ArrayBuffer) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  return fromObject(value)
 }
 
-// (public) this * a
-function bnMultiply(a) {
-  var r = new BigInteger()
-  this.multiplyTo(a, r)
-  return r
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(value, encodingOrOffset, length)
 }
 
-// (public) this^2
-function bnSquare() {
-  var r = new BigInteger()
-  this.squareTo(r)
-  return r
+// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
+// https://github.com/feross/buffer/pull/148
+Buffer.prototype.__proto__ = Uint8Array.prototype
+Buffer.__proto__ = Uint8Array
+
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be a number')
+  } else if (size < 0) {
+    throw new RangeError('"size" argument must not be negative')
+  }
 }
 
-// (public) this / a
-function bnDivide(a) {
-  var r = new BigInteger()
-  this.divRemTo(a, r, null)
-  return r
+function alloc (size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpretted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(size).fill(fill, encoding)
+      : createBuffer(size).fill(fill)
+  }
+  return createBuffer(size)
 }
 
-// (public) this % a
-function bnRemainder(a) {
-  var r = new BigInteger()
-  this.divRemTo(a, null, r)
-  return r
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(size, fill, encoding)
 }
 
-// (public) [this/a,this%a]
-function bnDivideAndRemainder(a) {
-  var q = new BigInteger(),
-    r = new BigInteger()
-  this.divRemTo(a, q, r)
-  return new Array(q, r)
+function allocUnsafe (size) {
+  assertSize(size)
+  return createBuffer(size < 0 ? 0 : checked(size) | 0)
 }
 
-// (protected) this *= n, this >= 0, 1 < n < DV
-function bnpDMultiply(n) {
-  this[this.t] = this.am(0, n - 1, this, 0, 0, this.t)
-  ++this.t
-  this.clamp()
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(size)
 }
 
-// (protected) this += n << w words, this >= 0
-function bnpDAddOffset(n, w) {
-  if (n == 0) return
-  while (this.t <= w) this[this.t++] = 0
-  this[w] += n
-  while (this[w] >= this.DV) {
-    this[w] -= this.DV
-    if (++w >= this.t) this[this.t++] = 0
-    ++this[w]
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
   }
-}
 
-// A "null" reducer
-function NullExp() {}
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('"encoding" must be a valid string encoding')
+  }
 
-function nNop(x) {
-  return x
+  var length = byteLength(string, encoding) | 0
+  var buf = createBuffer(length)
+
+  var actual = buf.write(string, encoding)
+
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    buf = buf.slice(0, actual)
+  }
+
+  return buf
 }
 
-function nMulTo(x, y, r) {
-  x.multiplyTo(y, r)
+function fromArrayLike (array) {
+  var length = array.length < 0 ? 0 : checked(array.length) | 0
+  var buf = createBuffer(length)
+  for (var i = 0; i < length; i += 1) {
+    buf[i] = array[i] & 255
+  }
+  return buf
 }
 
-function nSqrTo(x, r) {
-  x.squareTo(r)
+function fromArrayBuffer (array, byteOffset, length) {
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('\'offset\' is out of bounds')
+  }
+
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('\'length\' is out of bounds')
+  }
+
+  var buf
+  if (byteOffset === undefined && length === undefined) {
+    buf = new Uint8Array(array)
+  } else if (length === undefined) {
+    buf = new Uint8Array(array, byteOffset)
+  } else {
+    buf = new Uint8Array(array, byteOffset, length)
+  }
+
+  // Return an augmented `Uint8Array` instance
+  buf.__proto__ = Buffer.prototype
+  return buf
 }
 
-NullExp.prototype.convert = nNop
-NullExp.prototype.revert = nNop
-NullExp.prototype.mulTo = nMulTo
-NullExp.prototype.sqrTo = nSqrTo
+function fromObject (obj) {
+  if (Buffer.isBuffer(obj)) {
+    var len = checked(obj.length) | 0
+    var buf = createBuffer(len)
 
-// (public) this^e
-function bnPow(e) {
-  return this.exp(e, new NullExp())
+    if (buf.length === 0) {
+      return buf
+    }
+
+    obj.copy(buf, 0, 0, len)
+    return buf
+  }
+
+  if (obj) {
+    if (ArrayBuffer.isView(obj) || 'length' in obj) {
+      if (typeof obj.length !== 'number' || isnan(obj.length)) {
+        return createBuffer(0)
+      }
+      return fromArrayLike(obj)
+    }
+
+    if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
+      return fromArrayLike(obj.data)
+    }
+  }
+
+  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
 }
 
-// (protected) r = lower n words of "this * a", a.t <= n
-// "this" should be the larger one if appropriate.
-function bnpMultiplyLowerTo(a, n, r) {
-  var i = Math.min(this.t + a.t, n)
-  r.s = 0; // assumes a,this >= 0
-  r.t = i
-  while (i > 0) r[--i] = 0
-  var j
-  for (j = r.t - this.t; i < j; ++i) r[i + this.t] = this.am(0, a[i], r, i, 0, this.t)
-  for (j = Math.min(a.t, n); i < j; ++i) this.am(0, a[i], r, i, 0, n - i)
-  r.clamp()
+function checked (length) {
+  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= K_MAX_LENGTH) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
+  }
+  return length | 0
 }
 
-// (protected) r = "this * a" without lower n words, n > 0
-// "this" should be the larger one if appropriate.
-function bnpMultiplyUpperTo(a, n, r) {
-  --n
-  var i = r.t = this.t + a.t - n
-  r.s = 0; // assumes a,this >= 0
-  while (--i >= 0) r[i] = 0
-  for (i = Math.max(n - this.t, 0); i < a.t; ++i)
-    r[this.t + i - n] = this.am(n - i, a[i], r, 0, 0, this.t + i - n)
-  r.clamp()
-  r.drShiftTo(1, r)
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
+  }
+  return Buffer.alloc(+length)
 }
 
-// Barrett modular reduction
-function Barrett(m) {
-  // setup Barrett
-  this.r2 = new BigInteger()
-  this.q3 = new BigInteger()
-  BigInteger.ONE.dlShiftTo(2 * m.t, this.r2)
-  this.mu = this.r2.divide(m)
-  this.m = m
+Buffer.isBuffer = function isBuffer (b) {
+  return b != null && b._isBuffer === true
 }
 
-function barrettConvert(x) {
-  if (x.s < 0 || x.t > 2 * this.m.t) return x.mod(this.m)
-  else if (x.compareTo(this.m) < 0) return x
-  else {
-    var r = new BigInteger()
-    x.copyTo(r)
-    this.reduce(r)
-    return r
+Buffer.compare = function compare (a, b) {
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError('Arguments must be Buffers')
   }
+
+  if (a === b) return 0
+
+  var x = a.length
+  var y = b.length
+
+  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
 }
 
-function barrettRevert(x) {
-  return x
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
 }
 
-// x = x mod m (HAC 14.42)
-function barrettReduce(x) {
-  var self = this
-  x.drShiftTo(self.m.t - 1, self.r2)
-  if (x.t > self.m.t + 1) {
-    x.t = self.m.t + 1
-    x.clamp()
+Buffer.concat = function concat (list, length) {
+  if (!Array.isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
+  }
+
+  if (list.length === 0) {
+    return Buffer.alloc(0)
+  }
+
+  var i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
+
+  var buffer = Buffer.allocUnsafe(length)
+  var pos = 0
+  for (i = 0; i < list.length; ++i) {
+    var buf = list[i]
+    if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    }
+    buf.copy(buffer, pos)
+    pos += buf.length
+  }
+  return buffer
+}
+
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
+  }
+  if (ArrayBuffer.isView(string) || string instanceof ArrayBuffer) {
+    return string.byteLength
+  }
+  if (typeof string !== 'string') {
+    string = '' + string
+  }
+
+  var len = string.length
+  if (len === 0) return 0
+
+  // Use a for loop to avoid recursion
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+      case undefined:
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) return utf8ToBytes(string).length // assume utf8
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
   }
-  self.mu.multiplyUpperTo(self.r2, self.m.t + 1, self.q3)
-  self.m.multiplyLowerTo(self.q3, self.m.t + 1, self.r2)
-  while (x.compareTo(self.r2) < 0) x.dAddOffset(1, self.m.t + 1)
-  x.subTo(self.r2, x)
-  while (x.compareTo(self.m) >= 0) x.subTo(self.m, x)
 }
+Buffer.byteLength = byteLength
+
+function slowToString (encoding, start, end) {
+  var loweredCase = false
+
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
+  }
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
+  }
+
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
+
+  if (end <= 0) {
+    return ''
+  }
+
+  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
+
+  if (end <= start) {
+    return ''
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
 
-// r = x^2 mod m; x != r
-function barrettSqrTo(x, r) {
-  x.squareTo(r)
-  this.reduce(r)
-}
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
 
-// r = x*y mod m; x,y != r
-function barrettMulTo(x, y, r) {
-  x.multiplyTo(y, r)
-  this.reduce(r)
-}
+      case 'ascii':
+        return asciiSlice(this, start, end)
 
-Barrett.prototype.convert = barrettConvert
-Barrett.prototype.revert = barrettRevert
-Barrett.prototype.reduce = barrettReduce
-Barrett.prototype.mulTo = barrettMulTo
-Barrett.prototype.sqrTo = barrettSqrTo
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
 
-// (public) this^e % m (HAC 14.85)
-function bnModPow(e, m) {
-  var i = e.bitLength(),
-    k, r = nbv(1),
-    z
-  if (i <= 0) return r
-  else if (i < 18) k = 1
-  else if (i < 48) k = 3
-  else if (i < 144) k = 4
-  else if (i < 768) k = 5
-  else k = 6
-  if (i < 8)
-    z = new Classic(m)
-  else if (m.isEven())
-    z = new Barrett(m)
-  else
-    z = new Montgomery(m)
+      case 'base64':
+        return base64Slice(this, start, end)
 
-  // precomputation
-  var g = new Array(),
-    n = 3,
-    k1 = k - 1,
-    km = (1 << k) - 1
-  g[1] = z.convert(this)
-  if (k > 1) {
-    var g2 = new BigInteger()
-    z.sqrTo(g[1], g2)
-    while (n <= km) {
-      g[n] = new BigInteger()
-      z.mulTo(g2, g[n - 2], g[n])
-      n += 2
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
     }
   }
+}
 
-  var j = e.t - 1,
-    w, is1 = true,
-    r2 = new BigInteger(),
-    t
-  i = nbits(e[j]) - 1
-  while (j >= 0) {
-    if (i >= k1) w = (e[j] >> (i - k1)) & km
-    else {
-      w = (e[j] & ((1 << (i + 1)) - 1)) << (k1 - i)
-      if (j > 0) w |= e[j - 1] >> (this.DB + i - k1)
-    }
+// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
+// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
+// reliably in a browserify context because there could be multiple different
+// copies of the 'buffer' package in use. This method works even for Buffer
+// instances that were created from another copy of the `buffer` package.
+// See: https://github.com/feross/buffer/issues/154
+Buffer.prototype._isBuffer = true
 
-    n = k
-    while ((w & 1) == 0) {
-      w >>= 1
-      --n
-    }
-    if ((i -= n) < 0) {
-      i += this.DB
-      --j
-    }
-    if (is1) { // ret == 1, don't bother squaring or multiplying it
-      g[w].copyTo(r)
-      is1 = false
-    } else {
-      while (n > 1) {
-        z.sqrTo(r, r2)
-        z.sqrTo(r2, r)
-        n -= 2
-      }
-      if (n > 0) z.sqrTo(r, r2)
-      else {
-        t = r
-        r = r2
-        r2 = t
-      }
-      z.mulTo(r2, g[w], r)
-    }
+function swap (b, n, m) {
+  var i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
 
-    while (j >= 0 && (e[j] & (1 << i)) == 0) {
-      z.sqrTo(r, r2)
-      t = r
-      r = r2
-      r2 = t
-      if (--i < 0) {
-        i = this.DB - 1
-        --j
-      }
-    }
+Buffer.prototype.swap16 = function swap16 () {
+  var len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
   }
-  return z.revert(r)
+  for (var i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
 }
 
-// (public) gcd(this,a) (HAC 14.54)
-function bnGCD(a) {
-  var x = (this.s < 0) ? this.negate() : this.clone()
-  var y = (a.s < 0) ? a.negate() : a.clone()
-  if (x.compareTo(y) < 0) {
-    var t = x
-    x = y
-    y = t
+Buffer.prototype.swap32 = function swap32 () {
+  var len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
   }
-  var i = x.getLowestSetBit(),
-    g = y.getLowestSetBit()
-  if (g < 0) return x
-  if (i < g) g = i
-  if (g > 0) {
-    x.rShiftTo(g, x)
-    y.rShiftTo(g, y)
+  for (var i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
   }
-  while (x.signum() > 0) {
-    if ((i = x.getLowestSetBit()) > 0) x.rShiftTo(i, x)
-    if ((i = y.getLowestSetBit()) > 0) y.rShiftTo(i, y)
-    if (x.compareTo(y) >= 0) {
-      x.subTo(y, x)
-      x.rShiftTo(1, x)
-    } else {
-      y.subTo(x, y)
-      y.rShiftTo(1, y)
-    }
+  return this
+}
+
+Buffer.prototype.swap64 = function swap64 () {
+  var len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
   }
-  if (g > 0) y.lShiftTo(g, y)
-  return y
+  for (var i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
 }
 
-// (protected) this % n, n < 2^26
-function bnpModInt(n) {
-  if (n <= 0) return 0
-  var d = this.DV % n,
-    r = (this.s < 0) ? n - 1 : 0
-  if (this.t > 0)
-    if (d == 0) r = this[0] % n
-    else
-      for (var i = this.t - 1; i >= 0; --i) r = (d * r + this[i]) % n
-  return r
+Buffer.prototype.toString = function toString () {
+  var length = this.length
+  if (length === 0) return ''
+  if (arguments.length === 0) return utf8Slice(this, 0, length)
+  return slowToString.apply(this, arguments)
 }
 
-// (public) 1/this % m (HAC 14.61)
-function bnModInverse(m) {
-  var ac = m.isEven()
-  if ((this.isEven() && ac) || m.signum() == 0) return BigInteger.ZERO
-  var u = m.clone(),
-    v = this.clone()
-  var a = nbv(1),
-    b = nbv(0),
-    c = nbv(0),
-    d = nbv(1)
-  while (u.signum() != 0) {
-    while (u.isEven()) {
-      u.rShiftTo(1, u)
-      if (ac) {
-        if (!a.isEven() || !b.isEven()) {
-          a.addTo(this, a)
-          b.subTo(m, b)
-        }
-        a.rShiftTo(1, a)
-      } else if (!b.isEven()) b.subTo(m, b)
-      b.rShiftTo(1, b)
-    }
-    while (v.isEven()) {
-      v.rShiftTo(1, v)
-      if (ac) {
-        if (!c.isEven() || !d.isEven()) {
-          c.addTo(this, c)
-          d.subTo(m, d)
-        }
-        c.rShiftTo(1, c)
-      } else if (!d.isEven()) d.subTo(m, d)
-      d.rShiftTo(1, d)
-    }
-    if (u.compareTo(v) >= 0) {
-      u.subTo(v, u)
-      if (ac) a.subTo(c, a)
-      b.subTo(d, b)
-    } else {
-      v.subTo(u, v)
-      if (ac) c.subTo(a, c)
-      d.subTo(b, d)
-    }
+Buffer.prototype.equals = function equals (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return true
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.inspect = function inspect () {
+  var str = ''
+  var max = exports.INSPECT_MAX_BYTES
+  if (this.length > 0) {
+    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
+    if (this.length > max) str += ' ... '
   }
-  if (v.compareTo(BigInteger.ONE) != 0) return BigInteger.ZERO
-  if (d.compareTo(m) >= 0) return d.subtract(m)
-  if (d.signum() < 0) d.addTo(m, d)
-  else return d
-  if (d.signum() < 0) return d.add(m)
-  else return d
+  return '<Buffer ' + str + '>'
 }
 
-var lowprimes = [
-  2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
-  73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
-  157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233,
-  239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317,
-  331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419,
-  421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503,
-  509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607,
-  613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701,
-  709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811,
-  821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911,
-  919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997
-]
+Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
+  if (!Buffer.isBuffer(target)) {
+    throw new TypeError('Argument must be a Buffer')
+  }
 
-var lplim = (1 << 26) / lowprimes[lowprimes.length - 1]
+  if (start === undefined) {
+    start = 0
+  }
+  if (end === undefined) {
+    end = target ? target.length : 0
+  }
+  if (thisStart === undefined) {
+    thisStart = 0
+  }
+  if (thisEnd === undefined) {
+    thisEnd = this.length
+  }
 
-// (public) test primality with certainty >= 1-.5^t
-function bnIsProbablePrime(t) {
-  var i, x = this.abs()
-  if (x.t == 1 && x[0] <= lowprimes[lowprimes.length - 1]) {
-    for (i = 0; i < lowprimes.length; ++i)
-      if (x[0] == lowprimes[i]) return true
-    return false
+  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
+    throw new RangeError('out of range index')
+  }
+
+  if (thisStart >= thisEnd && start >= end) {
+    return 0
   }
-  if (x.isEven()) return false
-  i = 1
-  while (i < lowprimes.length) {
-    var m = lowprimes[i],
-      j = i + 1
-    while (j < lowprimes.length && m < lplim) m *= lowprimes[j++]
-    m = x.modInt(m)
-    while (i < j) if (m % lowprimes[i++] == 0) return false
+  if (thisStart >= thisEnd) {
+    return -1
+  }
+  if (start >= end) {
+    return 1
   }
-  return x.millerRabin(t)
-}
 
-// (protected) true if probably prime (HAC 4.24, Miller-Rabin)
-function bnpMillerRabin(t) {
-  var n1 = this.subtract(BigInteger.ONE)
-  var k = n1.getLowestSetBit()
-  if (k <= 0) return false
-  var r = n1.shiftRight(k)
-  t = (t + 1) >> 1
-  if (t > lowprimes.length) t = lowprimes.length
-  var a = new BigInteger(null)
-  var j, bases = []
-  for (var i = 0; i < t; ++i) {
-    for (;;) {
-      j = lowprimes[Math.floor(Math.random() * lowprimes.length)]
-      if (bases.indexOf(j) == -1) break
-    }
-    bases.push(j)
-    a.fromInt(j)
-    var y = a.modPow(r, this)
-    if (y.compareTo(BigInteger.ONE) != 0 && y.compareTo(n1) != 0) {
-      var j = 1
-      while (j++ < k && y.compareTo(n1) != 0) {
-        y = y.modPowInt(2, this)
-        if (y.compareTo(BigInteger.ONE) == 0) return false
-      }
-      if (y.compareTo(n1) != 0) return false
+  start >>>= 0
+  end >>>= 0
+  thisStart >>>= 0
+  thisEnd >>>= 0
+
+  if (this === target) return 0
+
+  var x = thisEnd - thisStart
+  var y = end - start
+  var len = Math.min(x, y)
+
+  var thisCopy = this.slice(thisStart, thisEnd)
+  var targetCopy = target.slice(start, end)
+
+  for (var i = 0; i < len; ++i) {
+    if (thisCopy[i] !== targetCopy[i]) {
+      x = thisCopy[i]
+      y = targetCopy[i]
+      break
     }
   }
-  return true
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
 }
 
-// protected
-proto.chunkSize = bnpChunkSize
-proto.toRadix = bnpToRadix
-proto.fromRadix = bnpFromRadix
-proto.fromNumber = bnpFromNumber
-proto.bitwiseTo = bnpBitwiseTo
-proto.changeBit = bnpChangeBit
-proto.addTo = bnpAddTo
-proto.dMultiply = bnpDMultiply
-proto.dAddOffset = bnpDAddOffset
-proto.multiplyLowerTo = bnpMultiplyLowerTo
-proto.multiplyUpperTo = bnpMultiplyUpperTo
-proto.modInt = bnpModInt
-proto.millerRabin = bnpMillerRabin
+// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
+// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
+//
+// Arguments:
+// - buffer - a Buffer to search
+// - val - a string, Buffer, or number
+// - byteOffset - an index into `buffer`; will be clamped to an int32
+// - encoding - an optional encoding, relevant is val is a string
+// - dir - true for indexOf, false for lastIndexOf
+function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
+  // Empty buffer means no match
+  if (buffer.length === 0) return -1
+
+  // Normalize byteOffset
+  if (typeof byteOffset === 'string') {
+    encoding = byteOffset
+    byteOffset = 0
+  } else if (byteOffset > 0x7fffffff) {
+    byteOffset = 0x7fffffff
+  } else if (byteOffset < -0x80000000) {
+    byteOffset = -0x80000000
+  }
+  byteOffset = +byteOffset  // Coerce to Number.
+  if (isNaN(byteOffset)) {
+    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
+    byteOffset = dir ? 0 : (buffer.length - 1)
+  }
+
+  // Normalize byteOffset: negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
+  if (byteOffset >= buffer.length) {
+    if (dir) return -1
+    else byteOffset = buffer.length - 1
+  } else if (byteOffset < 0) {
+    if (dir) byteOffset = 0
+    else return -1
+  }
+
+  // Normalize val
+  if (typeof val === 'string') {
+    val = Buffer.from(val, encoding)
+  }
 
-// public
-proto.clone = bnClone
-proto.intValue = bnIntValue
-proto.byteValue = bnByteValue
-proto.shortValue = bnShortValue
-proto.signum = bnSigNum
-proto.toByteArray = bnToByteArray
-proto.equals = bnEquals
-proto.min = bnMin
-proto.max = bnMax
-proto.and = bnAnd
-proto.or = bnOr
-proto.xor = bnXor
-proto.andNot = bnAndNot
-proto.not = bnNot
-proto.shiftLeft = bnShiftLeft
-proto.shiftRight = bnShiftRight
-proto.getLowestSetBit = bnGetLowestSetBit
-proto.bitCount = bnBitCount
-proto.testBit = bnTestBit
-proto.setBit = bnSetBit
-proto.clearBit = bnClearBit
-proto.flipBit = bnFlipBit
-proto.add = bnAdd
-proto.subtract = bnSubtract
-proto.multiply = bnMultiply
-proto.divide = bnDivide
-proto.remainder = bnRemainder
-proto.divideAndRemainder = bnDivideAndRemainder
-proto.modPow = bnModPow
-proto.modInverse = bnModInverse
-proto.pow = bnPow
-proto.gcd = bnGCD
-proto.isProbablePrime = bnIsProbablePrime
+  // Finally, search either indexOf (if dir is true) or lastIndexOf
+  if (Buffer.isBuffer(val)) {
+    // Special case: looking for empty string/buffer always fails
+    if (val.length === 0) {
+      return -1
+    }
+    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
+  } else if (typeof val === 'number') {
+    val = val & 0xFF // Search for a byte value [0-255]
+    if (typeof Uint8Array.prototype.indexOf === 'function') {
+      if (dir) {
+        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
+      } else {
+        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
+      }
+    }
+    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
+  }
 
-// JSBN-specific extension
-proto.square = bnSquare
+  throw new TypeError('val must be string, number or Buffer')
+}
 
-// constants
-BigInteger.ZERO = nbv(0)
-BigInteger.ONE = nbv(1)
-BigInteger.valueOf = nbv
+function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
+  var indexSize = 1
+  var arrLength = arr.length
+  var valLength = val.length
 
-module.exports = BigInteger
+  if (encoding !== undefined) {
+    encoding = String(encoding).toLowerCase()
+    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
+        encoding === 'utf16le' || encoding === 'utf-16le') {
+      if (arr.length < 2 || val.length < 2) {
+        return -1
+      }
+      indexSize = 2
+      arrLength /= 2
+      valLength /= 2
+      byteOffset /= 2
+    }
+  }
 
-},{"../package.json":4}],2:[function(require,module,exports){
-(function (Buffer){
-// FIXME: Kind of a weird way to throw exceptions, consider removing
-var assert = require('assert')
-var BigInteger = require('./bigi')
+  function read (buf, i) {
+    if (indexSize === 1) {
+      return buf[i]
+    } else {
+      return buf.readUInt16BE(i * indexSize)
+    }
+  }
 
-/**
- * Turns a byte array into a big integer.
- *
- * This function will interpret a byte array as a big integer in big
- * endian notation.
- */
-BigInteger.fromByteArrayUnsigned = function(byteArray) {
-  // BigInteger expects a DER integer conformant byte array
-  if (byteArray[0] & 0x80) {
-    return new BigInteger([0].concat(byteArray))
+  var i
+  if (dir) {
+    var foundIndex = -1
+    for (i = byteOffset; i < arrLength; i++) {
+      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
+      } else {
+        if (foundIndex !== -1) i -= i - foundIndex
+        foundIndex = -1
+      }
+    }
+  } else {
+    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
+    for (i = byteOffset; i >= 0; i--) {
+      var found = true
+      for (var j = 0; j < valLength; j++) {
+        if (read(arr, i + j) !== read(val, j)) {
+          found = false
+          break
+        }
+      }
+      if (found) return i
+    }
   }
 
-  return new BigInteger(byteArray)
+  return -1
 }
 
-/**
- * Returns a byte array representation of the big integer.
- *
- * This returns the absolute of the contained value in big endian
- * form. A value of zero results in an empty array.
- */
-BigInteger.prototype.toByteArrayUnsigned = function() {
-  var byteArray = this.toByteArray()
-  return byteArray[0] === 0 ? byteArray.slice(1) : byteArray
+Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
+  return this.indexOf(val, byteOffset, encoding) !== -1
 }
 
-BigInteger.fromDERInteger = function(byteArray) {
-  return new BigInteger(byteArray)
+Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
 }
 
-/*
- * Converts BigInteger to a DER integer representation.
- *
- * The format for this value uses the most significant bit as a sign
- * bit.  If the most significant bit is already set and the integer is
- * positive, a 0x00 is prepended.
- *
- * Examples:
- *
- *      0 =>     0x00
- *      1 =>     0x01
- *     -1 =>     0xff
- *    127 =>     0x7f
- *   -127 =>     0x81
- *    128 =>   0x0080
- *   -128 =>     0x80
- *    255 =>   0x00ff
- *   -255 =>   0xff01
- *  16300 =>   0x3fac
- * -16300 =>   0xc054
- *  62300 => 0x00f35c
- * -62300 => 0xff0ca4
-*/
-BigInteger.prototype.toDERInteger = BigInteger.prototype.toByteArray
+Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
+}
 
-BigInteger.fromBuffer = function(buffer) {
-  // BigInteger expects a DER integer conformant byte array
-  if (buffer[0] & 0x80) {
-    var byteArray = Array.prototype.slice.call(buffer)
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  var remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
 
-    return new BigInteger([0].concat(byteArray))
+  // must be an even number of digits
+  var strLen = string.length
+  if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  for (var i = 0; i < length; ++i) {
+    var parsed = parseInt(string.substr(i * 2, 2), 16)
+    if (isNaN(parsed)) return i
+    buf[offset + i] = parsed
   }
+  return i
+}
 
-  return new BigInteger(buffer)
+function utf8Write (buf, string, offset, length) {
+  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
 }
 
-BigInteger.fromHex = function(hex) {
-  if (hex === '') return BigInteger.ZERO
+function asciiWrite (buf, string, offset, length) {
+  return blitBuffer(asciiToBytes(string), buf, offset, length)
+}
 
-  assert.equal(hex, hex.match(/^[A-Fa-f0-9]+/), 'Invalid hex string')
-  assert.equal(hex.length % 2, 0, 'Incomplete hex')
-  return new BigInteger(hex, 16)
+function latin1Write (buf, string, offset, length) {
+  return asciiWrite(buf, string, offset, length)
 }
 
-BigInteger.prototype.toBuffer = function(size) {
-  var byteArray = this.toByteArrayUnsigned()
-  var zeros = []
+function base64Write (buf, string, offset, length) {
+  return blitBuffer(base64ToBytes(string), buf, offset, length)
+}
 
-  var padding = size - byteArray.length
-  while (zeros.length < padding) zeros.push(0)
+function ucs2Write (buf, string, offset, length) {
+  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+Buffer.prototype.write = function write (string, offset, length, encoding) {
+  // Buffer#write(string)
+  if (offset === undefined) {
+    encoding = 'utf8'
+    length = this.length
+    offset = 0
+  // Buffer#write(string, encoding)
+  } else if (length === undefined && typeof offset === 'string') {
+    encoding = offset
+    length = this.length
+    offset = 0
+  // Buffer#write(string, offset[, length][, encoding])
+  } else if (isFinite(offset)) {
+    offset = offset >>> 0
+    if (isFinite(length)) {
+      length = length >>> 0
+      if (encoding === undefined) encoding = 'utf8'
+    } else {
+      encoding = length
+      length = undefined
+    }
+  } else {
+    throw new Error(
+      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
+    )
+  }
 
-  return new Buffer(zeros.concat(byteArray))
-}
+  var remaining = this.length - offset
+  if (length === undefined || length > remaining) length = remaining
 
-BigInteger.prototype.toHex = function(size) {
-  return this.toBuffer(size).toString('hex')
-}
+  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
+    throw new RangeError('Attempt to write outside buffer bounds')
+  }
 
-}).call(this,require("buffer").Buffer)
-},{"./bigi":1,"assert":5,"buffer":7}],3:[function(require,module,exports){
-var BigInteger = require('./bigi')
+  if (!encoding) encoding = 'utf8'
 
-//addons
-require('./convert')
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'hex':
+        return hexWrite(this, string, offset, length)
 
-module.exports = BigInteger
-},{"./bigi":1,"./convert":2}],4:[function(require,module,exports){
-module.exports={
-  "name": "bigi",
-  "version": "1.4.0",
-  "description": "Big integers.",
-  "keywords": [
-    "cryptography",
-    "math",
-    "bitcoin",
-    "arbitrary",
-    "precision",
-    "arithmetic",
-    "big",
-    "integer",
-    "int",
-    "number",
-    "biginteger",
-    "bigint",
-    "bignumber",
-    "decimal",
-    "float"
-  ],
-  "devDependencies": {
-    "mocha": "^1.20.1",
-    "jshint": "^2.5.1",
-    "coveralls": "^2.10.0",
-    "istanbul": "^0.2.11"
-  },
-  "repository": {
-    "url": "https://github.com/cryptocoinjs/bigi",
-    "type": "git"
-  },
-  "main": "./lib/index.js",
-  "scripts": {
-    "test": "_mocha -- test/*.js",
-    "jshint": "jshint --config jshint.json lib/*.js ; true",
-    "unit": "mocha",
-    "coverage": "istanbul cover ./node_modules/.bin/_mocha -- --reporter list test/*.js",
-    "coveralls": "npm run-script coverage && node ./node_modules/.bin/coveralls < coverage/lcov.info"
-  },
-  "dependencies": {},
-  "testling": {
-    "files": "test/*.js",
-    "harness": "mocha",
-    "browsers": [
-      "ie/9..latest",
-      "firefox/latest",
-      "chrome/latest",
-      "safari/6.0..latest",
-      "iphone/6.0..latest",
-      "android-browser/4.2..latest"
-    ]
-  },
-  "bugs": {
-    "url": "https://github.com/cryptocoinjs/bigi/issues"
-  },
-  "homepage": "https://github.com/cryptocoinjs/bigi",
-  "_id": "bigi@1.4.0",
-  "dist": {
-    "shasum": "90ac1aeac0a531216463bdb58f42c1e05c8407ac",
-    "tarball": "http://registry.npmjs.org/bigi/-/bigi-1.4.0.tgz"
-  },
-  "_from": "bigi@^1.4.0",
-  "_npmVersion": "1.4.3",
-  "_npmUser": {
-    "name": "jp",
-    "email": "jprichardson@gmail.com"
-  },
-  "maintainers": [
-    {
-      "name": "jp",
-      "email": "jprichardson@gmail.com"
-    },
-    {
-      "name": "midnightlightning",
-      "email": "boydb@midnightdesign.ws"
-    },
-    {
-      "name": "sidazhang",
-      "email": "sidazhang89@gmail.com"
-    },
-    {
-      "name": "nadav",
-      "email": "npm@shesek.info"
-    }
-  ],
-  "directories": {},
-  "_shasum": "90ac1aeac0a531216463bdb58f42c1e05c8407ac",
-  "_resolved": "https://registry.npmjs.org/bigi/-/bigi-1.4.0.tgz"
-}
+      case 'utf8':
+      case 'utf-8':
+        return utf8Write(this, string, offset, length)
 
-},{}],5:[function(require,module,exports){
-// http://wiki.commonjs.org/wiki/Unit_Testing/1.0
-//
-// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
-//
-// Originally from narwhal.js (http://narwhaljs.org)
-// Copyright (c) 2009 Thomas Robinson <280north.com>
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the 'Software'), to
-// deal in the Software without restriction, including without limitation the
-// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
-// sell copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+      case 'ascii':
+        return asciiWrite(this, string, offset, length)
 
-// when used in node, this will actually load the util module we depend on
-// versus loading the builtin util module as happens otherwise
-// this is a bug in node module loading as far as I am concerned
-var util = require('util/');
+      case 'latin1':
+      case 'binary':
+        return latin1Write(this, string, offset, length)
 
-var pSlice = Array.prototype.slice;
-var hasOwn = Object.prototype.hasOwnProperty;
+      case 'base64':
+        // Warning: maxLength not taken into account in base64Write
+        return base64Write(this, string, offset, length)
 
-// 1. The assert module provides functions that throw
-// AssertionError's when particular conditions are not met. The
-// assert module must conform to the following interface.
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return ucs2Write(this, string, offset, length)
 
-var assert = module.exports = ok;
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
 
-// 2. The AssertionError is defined in assert.
-// new assert.AssertionError({ message: message,
-//                             actual: actual,
-//                             expected: expected })
+Buffer.prototype.toJSON = function toJSON () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
 
-assert.AssertionError = function AssertionError(options) {
-  this.name = 'AssertionError';
-  this.actual = options.actual;
-  this.expected = options.expected;
-  this.operator = options.operator;
-  if (options.message) {
-    this.message = options.message;
-    this.generatedMessage = false;
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
   } else {
-    this.message = getMessage(this);
-    this.generatedMessage = true;
+    return base64.fromByteArray(buf.slice(start, end))
   }
-  var stackStartFunction = options.stackStartFunction || fail;
+}
 
-  if (Error.captureStackTrace) {
-    Error.captureStackTrace(this, stackStartFunction);
-  }
-  else {
-    // non v8 browsers so we can have a stacktrace
-    var err = new Error();
-    if (err.stack) {
-      var out = err.stack;
+function utf8Slice (buf, start, end) {
+  end = Math.min(buf.length, end)
+  var res = []
 
-      // try to strip useless frames
-      var fn_name = stackStartFunction.name;
-      var idx = out.indexOf('\n' + fn_name);
-      if (idx >= 0) {
-        // once we have located the function frame
-        // we need to strip out everything before it (and its line)
-        var next_line = out.indexOf('\n', idx + 1);
-        out = out.substring(next_line + 1);
+  var i = start
+  while (i < end) {
+    var firstByte = buf[i]
+    var codePoint = null
+    var bytesPerSequence = (firstByte > 0xEF) ? 4
+      : (firstByte > 0xDF) ? 3
+      : (firstByte > 0xBF) ? 2
+      : 1
+
+    if (i + bytesPerSequence <= end) {
+      var secondByte, thirdByte, fourthByte, tempCodePoint
+
+      switch (bytesPerSequence) {
+        case 1:
+          if (firstByte < 0x80) {
+            codePoint = firstByte
+          }
+          break
+        case 2:
+          secondByte = buf[i + 1]
+          if ((secondByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
+            if (tempCodePoint > 0x7F) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 3:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
+            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 4:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          fourthByte = buf[i + 3]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
+            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
+              codePoint = tempCodePoint
+            }
+          }
       }
+    }
 
-      this.stack = out;
+    if (codePoint === null) {
+      // we did not generate a valid codePoint so insert a
+      // replacement char (U+FFFD) and advance only 1 byte
+      codePoint = 0xFFFD
+      bytesPerSequence = 1
+    } else if (codePoint > 0xFFFF) {
+      // encode to utf16 (surrogate pair dance)
+      codePoint -= 0x10000
+      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
+      codePoint = 0xDC00 | codePoint & 0x3FF
     }
+
+    res.push(codePoint)
+    i += bytesPerSequence
   }
-};
 
-// assert.AssertionError instanceof Error
-util.inherits(assert.AssertionError, Error);
+  return decodeCodePointsArray(res)
+}
 
-function replacer(key, value) {
-  if (util.isUndefined(value)) {
-    return '' + value;
-  }
-  if (util.isNumber(value) && !isFinite(value)) {
-    return value.toString();
+// Based on http://stackoverflow.com/a/22747272/680742, the browser with
+// the lowest limit is Chrome, with 0x10000 args.
+// We go 1 magnitude less, for safety
+var MAX_ARGUMENTS_LENGTH = 0x1000
+
+function decodeCodePointsArray (codePoints) {
+  var len = codePoints.length
+  if (len <= MAX_ARGUMENTS_LENGTH) {
+    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
   }
-  if (util.isFunction(value) || util.isRegExp(value)) {
-    return value.toString();
+
+  // Decode in chunks to avoid "call stack size exceeded".
+  var res = ''
+  var i = 0
+  while (i < len) {
+    res += String.fromCharCode.apply(
+      String,
+      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
+    )
   }
-  return value;
+  return res
 }
 
-function truncate(s, n) {
-  if (util.isString(s)) {
-    return s.length < n ? s : s.slice(0, n);
-  } else {
-    return s;
+function asciiSlice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i] & 0x7F)
   }
+  return ret
 }
 
-function getMessage(self) {
-  return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' +
-         self.operator + ' ' +
-         truncate(JSON.stringify(self.expected, replacer), 128);
+function latin1Slice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
 }
 
-// At present only the three keys mentioned above are used and
-// understood by the spec. Implementations or sub modules can pass
-// other keys to the AssertionError's constructor - they will be
-// ignored.
+function hexSlice (buf, start, end) {
+  var len = buf.length
 
-// 3. All of the following functions must throw an AssertionError
-// when a corresponding condition is not met, with a message that
-// may be undefined if not provided.  All assertion methods provide
-// both the actual and expected values to the assertion error for
-// display purposes.
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
 
-function fail(actual, expected, message, operator, stackStartFunction) {
-  throw new assert.AssertionError({
-    message: message,
-    actual: actual,
-    expected: expected,
-    operator: operator,
-    stackStartFunction: stackStartFunction
-  });
+  var out = ''
+  for (var i = start; i < end; ++i) {
+    out += toHex(buf[i])
+  }
+  return out
 }
 
-// EXTENSION! allows for well behaved errors defined elsewhere.
-assert.fail = fail;
+function utf16leSlice (buf, start, end) {
+  var bytes = buf.slice(start, end)
+  var res = ''
+  for (var i = 0; i < bytes.length; i += 2) {
+    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
+  }
+  return res
+}
 
-// 4. Pure assertion tests whether a value is truthy, as determined
-// by !!guard.
-// assert.ok(guard, message_opt);
-// This statement is equivalent to assert.equal(true, !!guard,
-// message_opt);. To test strictly for the value true, use
-// assert.strictEqual(true, guard, message_opt);.
+Buffer.prototype.slice = function slice (start, end) {
+  var len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
 
-function ok(value, message) {
-  if (!value) fail(value, true, message, '==', assert.ok);
-}
-assert.ok = ok;
+  if (start < 0) {
+    start += len
+    if (start < 0) start = 0
+  } else if (start > len) {
+    start = len
+  }
 
-// 5. The equality assertion tests shallow, coercive equality with
-// ==.
-// assert.equal(actual, expected, message_opt);
+  if (end < 0) {
+    end += len
+    if (end < 0) end = 0
+  } else if (end > len) {
+    end = len
+  }
 
-assert.equal = function equal(actual, expected, message) {
-  if (actual != expected) fail(actual, expected, message, '==', assert.equal);
-};
+  if (end < start) end = start
 
-// 6. The non-equality assertion tests for whether two objects are not equal
-// with != assert.notEqual(actual, expected, message_opt);
+  var newBuf = this.subarray(start, end)
+  // Return an augmented `Uint8Array` instance
+  newBuf.__proto__ = Buffer.prototype
+  return newBuf
+}
 
-assert.notEqual = function notEqual(actual, expected, message) {
-  if (actual == expected) {
-    fail(actual, expected, message, '!=', assert.notEqual);
-  }
-};
+/*
+ * Need to make sure that buffer isn't trying to write out of bounds.
+ */
+function checkOffset (offset, ext, length) {
+  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
+  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
+}
 
-// 7. The equivalence assertion tests a deep equality relation.
-// assert.deepEqual(actual, expected, message_opt);
+Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
 
-assert.deepEqual = function deepEqual(actual, expected, message) {
-  if (!_deepEqual(actual, expected)) {
-    fail(actual, expected, message, 'deepEqual', assert.deepEqual);
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
   }
-};
-
-function _deepEqual(actual, expected) {
-  // 7.1. All identical values are equivalent, as determined by ===.
-  if (actual === expected) {
-    return true;
 
-  } else if (util.isBuffer(actual) && util.isBuffer(expected)) {
-    if (actual.length != expected.length) return false;
+  return val
+}
 
-    for (var i = 0; i < actual.length; i++) {
-      if (actual[i] !== expected[i]) return false;
-    }
+Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    checkOffset(offset, byteLength, this.length)
+  }
 
-    return true;
+  var val = this[offset + --byteLength]
+  var mul = 1
+  while (byteLength > 0 && (mul *= 0x100)) {
+    val += this[offset + --byteLength] * mul
+  }
 
-  // 7.2. If the expected value is a Date object, the actual value is
-  // equivalent if it is also a Date object that refers to the same time.
-  } else if (util.isDate(actual) && util.isDate(expected)) {
-    return actual.getTime() === expected.getTime();
+  return val
+}
 
-  // 7.3 If the expected value is a RegExp object, the actual value is
-  // equivalent if it is also a RegExp object with the same source and
-  // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
-  } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
-    return actual.source === expected.source &&
-           actual.global === expected.global &&
-           actual.multiline === expected.multiline &&
-           actual.lastIndex === expected.lastIndex &&
-           actual.ignoreCase === expected.ignoreCase;
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  return this[offset]
+}
 
-  // 7.4. Other pairs that do not both pass typeof value == 'object',
-  // equivalence is determined by ==.
-  } else if (!util.isObject(actual) && !util.isObject(expected)) {
-    return actual == expected;
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return this[offset] | (this[offset + 1] << 8)
+}
 
-  // 7.5 For all other Object pairs, including Array objects, equivalence is
-  // determined by having the same number of owned properties (as verified
-  // with Object.prototype.hasOwnProperty.call), the same set of keys
-  // (although not necessarily the same order), equivalent values for every
-  // corresponding key, and an identical 'prototype' property. Note: this
-  // accounts for both named and indexed properties on Arrays.
-  } else {
-    return objEquiv(actual, expected);
-  }
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return (this[offset] << 8) | this[offset + 1]
 }
 
-function isArguments(object) {
-  return Object.prototype.toString.call(object) == '[object Arguments]';
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return ((this[offset]) |
+      (this[offset + 1] << 8) |
+      (this[offset + 2] << 16)) +
+      (this[offset + 3] * 0x1000000)
 }
 
-function objEquiv(a, b) {
-  if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b))
-    return false;
-  // an identical 'prototype' property.
-  if (a.prototype !== b.prototype) return false;
-  // if one is a primitive, the other must be same
-  if (util.isPrimitive(a) || util.isPrimitive(b)) {
-    return a === b;
-  }
-  var aIsArgs = isArguments(a),
-      bIsArgs = isArguments(b);
-  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
-    return false;
-  if (aIsArgs) {
-    a = pSlice.call(a);
-    b = pSlice.call(b);
-    return _deepEqual(a, b);
-  }
-  var ka = objectKeys(a),
-      kb = objectKeys(b),
-      key, i;
-  // having the same number of owned properties (keys incorporates
-  // hasOwnProperty)
-  if (ka.length != kb.length)
-    return false;
-  //the same set of keys (although not necessarily the same order),
-  ka.sort();
-  kb.sort();
-  //~~~cheap key test
-  for (i = ka.length - 1; i >= 0; i--) {
-    if (ka[i] != kb[i])
-      return false;
-  }
-  //equivalent values for every corresponding key, and
-  //~~~possibly expensive deep test
-  for (i = ka.length - 1; i >= 0; i--) {
-    key = ka[i];
-    if (!_deepEqual(a[key], b[key])) return false;
-  }
-  return true;
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] * 0x1000000) +
+    ((this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    this[offset + 3])
 }
 
-// 8. The non-equivalence assertion tests for any deep inequality.
-// assert.notDeepEqual(actual, expected, message_opt);
+Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
 
-assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
-  if (_deepEqual(actual, expected)) {
-    fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
   }
-};
+  mul *= 0x80
 
-// 9. The strict equality assertion tests strict equality, as determined by ===.
-// assert.strictEqual(actual, expected, message_opt);
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
 
-assert.strictEqual = function strictEqual(actual, expected, message) {
-  if (actual !== expected) {
-    fail(actual, expected, message, '===', assert.strictEqual);
-  }
-};
+  return val
+}
 
-// 10. The strict non-equality assertion tests for strict inequality, as
-// determined by !==.  assert.notStrictEqual(actual, expected, message_opt);
+Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
 
-assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
-  if (actual === expected) {
-    fail(actual, expected, message, '!==', assert.notStrictEqual);
+  var i = byteLength
+  var mul = 1
+  var val = this[offset + --i]
+  while (i > 0 && (mul *= 0x100)) {
+    val += this[offset + --i] * mul
   }
-};
+  mul *= 0x80
 
-function expectedException(actual, expected) {
-  if (!actual || !expected) {
-    return false;
-  }
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
 
-  if (Object.prototype.toString.call(expected) == '[object RegExp]') {
-    return expected.test(actual);
-  } else if (actual instanceof expected) {
-    return true;
-  } else if (expected.call({}, actual) === true) {
-    return true;
-  }
+  return val
+}
 
-  return false;
+Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  if (!(this[offset] & 0x80)) return (this[offset])
+  return ((0xff - this[offset] + 1) * -1)
 }
 
-function _throws(shouldThrow, block, expected, message) {
-  var actual;
+Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset] | (this[offset + 1] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
 
-  if (util.isString(expected)) {
-    message = expected;
-    expected = null;
-  }
+Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset + 1] | (this[offset] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
 
-  try {
-    block();
-  } catch (e) {
-    actual = e;
-  }
+Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
 
-  message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
-            (message ? ' ' + message : '.');
+  return (this[offset]) |
+    (this[offset + 1] << 8) |
+    (this[offset + 2] << 16) |
+    (this[offset + 3] << 24)
+}
 
-  if (shouldThrow && !actual) {
-    fail(actual, expected, 'Missing expected exception' + message);
-  }
+Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
 
-  if (!shouldThrow && expectedException(actual, expected)) {
-    fail(actual, expected, 'Got unwanted exception' + message);
-  }
+  return (this[offset] << 24) |
+    (this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    (this[offset + 3])
+}
 
-  if ((shouldThrow && actual && expected &&
-      !expectedException(actual, expected)) || (!shouldThrow && actual)) {
-    throw actual;
-  }
+Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, true, 23, 4)
 }
 
-// 11. Expected to throw an error:
-// assert.throws(block, Error_opt, message_opt);
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, false, 23, 4)
+}
 
-assert.throws = function(block, /*optional*/error, /*optional*/message) {
-  _throws.apply(this, [true].concat(pSlice.call(arguments)));
-};
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, true, 52, 8)
+}
 
-// EXTENSION! This is annoying to write outside this module.
-assert.doesNotThrow = function(block, /*optional*/message) {
-  _throws.apply(this, [false].concat(pSlice.call(arguments)));
-};
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, false, 52, 8)
+}
 
-assert.ifError = function(err) { if (err) {throw err;}};
+function checkInt (buf, value, offset, ext, max, min) {
+  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
+  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+}
 
-var objectKeys = Object.keys || function (obj) {
-  var keys = [];
-  for (var key in obj) {
-    if (hasOwn.call(obj, key)) keys.push(key);
+Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
   }
-  return keys;
-};
 
-},{"util/":29}],6:[function(require,module,exports){
+  var mul = 1
+  var i = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
 
-},{}],7:[function(require,module,exports){
-/*!
- * The buffer module from node.js, for the browser.
- *
- * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
- * @license  MIT
- */
+  return offset + byteLength
+}
 
-var base64 = require('base64-js')
-var ieee754 = require('ieee754')
-var isArray = require('is-array')
+Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
 
-exports.Buffer = Buffer
-exports.SlowBuffer = SlowBuffer
-exports.INSPECT_MAX_BYTES = 50
-Buffer.poolSize = 8192 // not used by this implementation
+  var i = byteLength - 1
+  var mul = 1
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
 
-var rootParent = {}
+  return offset + byteLength
+}
 
-/**
- * If `Buffer.TYPED_ARRAY_SUPPORT`:
- *   === true    Use Uint8Array implementation (fastest)
- *   === false   Use Object implementation (most compatible, even IE6)
- *
- * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
- * Opera 11.6+, iOS 4.2+.
- *
- * Due to various browser bugs, sometimes the Object implementation will be used even
- * when the browser supports typed arrays.
- *
- * Note:
- *
- *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
- *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
- *
- *   - Safari 5-7 lacks support for changing the `Object.prototype.constructor` property
- *     on objects.
- *
- *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
- *
- *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
- *     incorrect length in some situations.
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
 
- * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
- * get the Object implementation, which is slower but behaves correctly.
- */
-Buffer.TYPED_ARRAY_SUPPORT = (function () {
-  function Bar () {}
-  try {
-    var arr = new Uint8Array(1)
-    arr.foo = function () { return 42 }
-    arr.constructor = Bar
-    return arr.foo() === 42 && // typed array instances can be augmented
-        arr.constructor === Bar && // constructor can be set
-        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
-        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
-  } catch (e) {
-    return false
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset + 3] = (value >>> 24)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 1] = (value >>> 8)
+  this[offset] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = 0
+  var mul = 1
+  var sub = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
   }
-})()
 
-function kMaxLength () {
-  return Buffer.TYPED_ARRAY_SUPPORT
-    ? 0x7fffffff
-    : 0x3fffffff
+  return offset + byteLength
 }
 
-/**
- * Class: Buffer
- * =============
- *
- * The Buffer constructor returns instances of `Uint8Array` that are augmented
- * with function properties for all the node `Buffer` API functions. We use
- * `Uint8Array` so that square bracket notation works as expected -- it returns
- * a single octet.
- *
- * By augmenting the instances, we can avoid modifying the `Uint8Array`
- * prototype.
- */
-function Buffer (arg) {
-  if (!(this instanceof Buffer)) {
-    // Avoid going through an ArgumentsAdaptorTrampoline in the common case.
-    if (arguments.length > 1) return new Buffer(arg, arguments[1])
-    return new Buffer(arg)
-  }
-
-  this.length = 0
-  this.parent = undefined
+Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
 
-  // Common case.
-  if (typeof arg === 'number') {
-    return fromNumber(this, arg)
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
   }
 
-  // Slightly less common case.
-  if (typeof arg === 'string') {
-    return fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8')
+  var i = byteLength - 1
+  var mul = 1
+  var sub = 0
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
   }
 
-  // Unusual.
-  return fromObject(this, arg)
+  return offset + byteLength
 }
 
-function fromNumber (that, length) {
-  that = allocate(that, length < 0 ? 0 : checked(length) | 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) {
-    for (var i = 0; i < length; i++) {
-      that[i] = 0
-    }
-  }
-  return that
+Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
+  if (value < 0) value = 0xff + value + 1
+  this[offset] = (value & 0xff)
+  return offset + 1
 }
 
-function fromString (that, string, encoding) {
-  if (typeof encoding !== 'string' || encoding === '') encoding = 'utf8'
+Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
 
-  // Assumption: byteLength() return value is always < kMaxLength.
-  var length = byteLength(string, encoding) | 0
-  that = allocate(that, length)
+Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
 
-  that.write(string, encoding)
-  return that
+Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 3] = (value >>> 24)
+  return offset + 4
 }
 
-function fromObject (that, object) {
-  if (Buffer.isBuffer(object)) return fromBuffer(that, object)
+Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (value < 0) value = 0xffffffff + value + 1
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
 
-  if (isArray(object)) return fromArray(that, object)
+function checkIEEE754 (buf, value, offset, ext, max, min) {
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+  if (offset < 0) throw new RangeError('Index out of range')
+}
 
-  if (object == null) {
-    throw new TypeError('must start with number, buffer, array or string')
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
   }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
 
-  if (typeof ArrayBuffer !== 'undefined') {
-    if (object.buffer instanceof ArrayBuffer) {
-      return fromTypedArray(that, object)
-    }
-    if (object instanceof ArrayBuffer) {
-      return fromArrayBuffer(that, object)
-    }
-  }
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
 
-  if (object.length) return fromArrayLike(that, object)
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
 
-  return fromJsonObject(that, object)
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
 }
 
-function fromBuffer (that, buffer) {
-  var length = checked(buffer.length) | 0
-  that = allocate(that, length)
-  buffer.copy(that, 0, 0, length)
-  return that
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
 }
 
-function fromArray (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
-  }
-  return that
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
 }
 
-// Duplicate of fromArray() to keep fromArray() monomorphic.
-function fromTypedArray (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  // Truncating the elements is probably not what people expect from typed
-  // arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior
-  // of the old Buffer constructor.
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
   }
-  return that
-}
+  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
 
-function fromArrayBuffer (that, array) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    array.byteLength
-    that = Buffer._augment(new Uint8Array(array))
-  } else {
-    // Fallback: Return an object instance of the Buffer class
-    that = fromTypedArray(that, new Uint8Array(array))
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
   }
-  return that
-}
 
-function fromArrayLike (that, array) {
-  var length = checked(array.length) | 0
-  that = allocate(that, length)
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
+  var len = end - start
+  var i
+
+  if (this === target && start < targetStart && targetStart < end) {
+    // descending copy from end
+    for (i = len - 1; i >= 0; --i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else if (len < 1000) {
+    // ascending copy from start
+    for (i = 0; i < len; ++i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, start + len),
+      targetStart
+    )
   }
-  return that
+
+  return len
 }
 
-// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.
-// Returns a zero-length buffer for inputs that don't conform to the spec.
-function fromJsonObject (that, object) {
-  var array
-  var length = 0
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (val.length === 1) {
+      var code = val.charCodeAt(0)
+      if (code < 256) {
+        val = code
+      }
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  }
 
-  if (object.type === 'Buffer' && isArray(object.data)) {
-    array = object.data
-    length = checked(array.length) | 0
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
   }
-  that = allocate(that, length)
 
-  for (var i = 0; i < length; i += 1) {
-    that[i] = array[i] & 255
+  if (end <= start) {
+    return this
   }
-  return that
-}
 
-function allocate (that, length) {
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    // Return an augmented `Uint8Array` instance, for best performance
-    that = Buffer._augment(new Uint8Array(length))
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  var i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
   } else {
-    // Fallback: Return an object instance of the Buffer class
-    that.length = length
-    that._isBuffer = true
+    var bytes = Buffer.isBuffer(val)
+      ? val
+      : new Buffer(val, encoding)
+    var len = bytes.length
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
   }
 
-  var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1
-  if (fromPool) that.parent = rootParent
-
-  return that
+  return this
 }
 
-function checked (length) {
-  // Note: cannot use `length < kMaxLength` here because that fails when
-  // length is NaN (which is otherwise coerced to zero.)
-  if (length >= kMaxLength()) {
-    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
-                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
+// HELPER FUNCTIONS
+// ================
+
+var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
   }
-  return length | 0
+  return str
 }
 
-function SlowBuffer (subject, encoding) {
-  if (!(this instanceof SlowBuffer)) return new SlowBuffer(subject, encoding)
-
-  var buf = new Buffer(subject, encoding)
-  delete buf.parent
-  return buf
+function stringtrim (str) {
+  if (str.trim) return str.trim()
+  return str.replace(/^\s+|\s+$/g, '')
 }
 
-Buffer.isBuffer = function isBuffer (b) {
-  return !!(b != null && b._isBuffer)
+function toHex (n) {
+  if (n < 16) return '0' + n.toString(16)
+  return n.toString(16)
 }
 
-Buffer.compare = function compare (a, b) {
-  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
-    throw new TypeError('Arguments must be Buffers')
-  }
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  var codePoint
+  var length = string.length
+  var leadSurrogate = null
+  var bytes = []
 
-  if (a === b) return 0
+  for (var i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
 
-  var x = a.length
-  var y = b.length
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
 
-  var i = 0
-  var len = Math.min(x, y)
-  while (i < len) {
-    if (a[i] !== b[i]) break
+        // valid lead
+        leadSurrogate = codePoint
 
-    ++i
-  }
+        continue
+      }
 
-  if (i !== len) {
-    x = a[i]
-    y = b[i]
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
   }
 
-  if (x < y) return -1
-  if (y < x) return 1
-  return 0
+  return bytes
 }
 
-Buffer.isEncoding = function isEncoding (encoding) {
-  switch (String(encoding).toLowerCase()) {
-    case 'hex':
-    case 'utf8':
-    case 'utf-8':
-    case 'ascii':
-    case 'binary':
-    case 'base64':
-    case 'raw':
-    case 'ucs2':
-    case 'ucs-2':
-    case 'utf16le':
-    case 'utf-16le':
-      return true
-    default:
-      return false
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
   }
+  return byteArray
 }
 
-Buffer.concat = function concat (list, length) {
-  if (!isArray(list)) throw new TypeError('list argument must be an Array of Buffers.')
+function utf16leToBytes (str, units) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
 
-  if (list.length === 0) {
-    return new Buffer(0)
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
   }
 
-  var i
-  if (length === undefined) {
-    length = 0
-    for (i = 0; i < list.length; i++) {
-      length += list[i].length
-    }
-  }
+  return byteArray
+}
 
-  var buf = new Buffer(length)
-  var pos = 0
-  for (i = 0; i < list.length; i++) {
-    var item = list[i]
-    item.copy(buf, pos)
-    pos += item.length
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
   }
-  return buf
+  return i
 }
 
-function byteLength (string, encoding) {
-  if (typeof string !== 'string') string = '' + string
+function isnan (val) {
+  return val !== val // eslint-disable-line no-self-compare
+}
 
-  var len = string.length
-  if (len === 0) return 0
+},{"base64-js":2,"ieee754":8}],6:[function(require,module,exports){
+(function (Buffer){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-  // Use a for loop to avoid recursion
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'ascii':
-      case 'binary':
-      // Deprecated
-      case 'raw':
-      case 'raws':
-        return len
-      case 'utf8':
-      case 'utf-8':
-        return utf8ToBytes(string).length
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return len * 2
-      case 'hex':
-        return len >>> 1
-      case 'base64':
-        return base64ToBytes(string).length
-      default:
-        if (loweredCase) return utf8ToBytes(string).length // assume utf8
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
-    }
+// NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+
+function isArray(arg) {
+  if (Array.isArray) {
+    return Array.isArray(arg);
   }
+  return objectToString(arg) === '[object Array]';
 }
-Buffer.byteLength = byteLength
-
-// pre-set for values that may exist in the future
-Buffer.prototype.length = undefined
-Buffer.prototype.parent = undefined
+exports.isArray = isArray;
 
-function slowToString (encoding, start, end) {
-  var loweredCase = false
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+exports.isBoolean = isBoolean;
 
-  start = start | 0
-  end = end === undefined || end === Infinity ? this.length : end | 0
+function isNull(arg) {
+  return arg === null;
+}
+exports.isNull = isNull;
 
-  if (!encoding) encoding = 'utf8'
-  if (start < 0) start = 0
-  if (end > this.length) end = this.length
-  if (end <= start) return ''
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+exports.isNullOrUndefined = isNullOrUndefined;
 
-  while (true) {
-    switch (encoding) {
-      case 'hex':
-        return hexSlice(this, start, end)
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+exports.isNumber = isNumber;
 
-      case 'utf8':
-      case 'utf-8':
-        return utf8Slice(this, start, end)
+function isString(arg) {
+  return typeof arg === 'string';
+}
+exports.isString = isString;
 
-      case 'ascii':
-        return asciiSlice(this, start, end)
+function isSymbol(arg) {
+  return typeof arg === 'symbol';
+}
+exports.isSymbol = isSymbol;
 
-      case 'binary':
-        return binarySlice(this, start, end)
+function isUndefined(arg) {
+  return arg === void 0;
+}
+exports.isUndefined = isUndefined;
 
-      case 'base64':
-        return base64Slice(this, start, end)
+function isRegExp(re) {
+  return objectToString(re) === '[object RegExp]';
+}
+exports.isRegExp = isRegExp;
 
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return utf16leSlice(this, start, end)
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+exports.isObject = isObject;
 
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = (encoding + '').toLowerCase()
-        loweredCase = true
-    }
-  }
+function isDate(d) {
+  return objectToString(d) === '[object Date]';
 }
+exports.isDate = isDate;
 
-Buffer.prototype.toString = function toString () {
-  var length = this.length | 0
-  if (length === 0) return ''
-  if (arguments.length === 0) return utf8Slice(this, 0, length)
-  return slowToString.apply(this, arguments)
+function isError(e) {
+  return (objectToString(e) === '[object Error]' || e instanceof Error);
 }
+exports.isError = isError;
 
-Buffer.prototype.equals = function equals (b) {
-  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
-  if (this === b) return true
-  return Buffer.compare(this, b) === 0
+function isFunction(arg) {
+  return typeof arg === 'function';
 }
+exports.isFunction = isFunction;
 
-Buffer.prototype.inspect = function inspect () {
-  var str = ''
-  var max = exports.INSPECT_MAX_BYTES
-  if (this.length > 0) {
-    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
-    if (this.length > max) str += ' ... '
-  }
-  return '<Buffer ' + str + '>'
+function isPrimitive(arg) {
+  return arg === null ||
+         typeof arg === 'boolean' ||
+         typeof arg === 'number' ||
+         typeof arg === 'string' ||
+         typeof arg === 'symbol' ||  // ES6 symbol
+         typeof arg === 'undefined';
 }
+exports.isPrimitive = isPrimitive;
 
-Buffer.prototype.compare = function compare (b) {
-  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
-  if (this === b) return 0
-  return Buffer.compare(this, b)
+exports.isBuffer = Buffer.isBuffer;
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
 }
 
-Buffer.prototype.indexOf = function indexOf (val, byteOffset) {
-  if (byteOffset > 0x7fffffff) byteOffset = 0x7fffffff
-  else if (byteOffset < -0x80000000) byteOffset = -0x80000000
-  byteOffset >>= 0
+}).call(this,{"isBuffer":require("../../is-buffer/index.js")})
+},{"../../is-buffer/index.js":10}],7:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-  if (this.length === 0) return -1
-  if (byteOffset >= this.length) return -1
+function EventEmitter() {
+  this._events = this._events || {};
+  this._maxListeners = this._maxListeners || undefined;
+}
+module.exports = EventEmitter;
 
-  // Negative offsets start from the end of the buffer
-  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)
+// Backwards-compat with node 0.10.x
+EventEmitter.EventEmitter = EventEmitter;
 
-  if (typeof val === 'string') {
-    if (val.length === 0) return -1 // special case: looking for empty string always fails
-    return String.prototype.indexOf.call(this, val, byteOffset)
-  }
-  if (Buffer.isBuffer(val)) {
-    return arrayIndexOf(this, val, byteOffset)
-  }
-  if (typeof val === 'number') {
-    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
-      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
-    }
-    return arrayIndexOf(this, [ val ], byteOffset)
-  }
+EventEmitter.prototype._events = undefined;
+EventEmitter.prototype._maxListeners = undefined;
 
-  function arrayIndexOf (arr, val, byteOffset) {
-    var foundIndex = -1
-    for (var i = 0; byteOffset + i < arr.length; i++) {
-      if (arr[byteOffset + i] === val[foundIndex === -1 ? 0 : i - foundIndex]) {
-        if (foundIndex === -1) foundIndex = i
-        if (i - foundIndex + 1 === val.length) return byteOffset + foundIndex
+// By default EventEmitters will print a warning if more than 10 listeners are
+// added to it. This is a useful default which helps finding memory leaks.
+EventEmitter.defaultMaxListeners = 10;
+
+// Obviously not all Emitters should be limited to 10. This function allows
+// that to be increased. Set to zero for unlimited.
+EventEmitter.prototype.setMaxListeners = function(n) {
+  if (!isNumber(n) || n < 0 || isNaN(n))
+    throw TypeError('n must be a positive number');
+  this._maxListeners = n;
+  return this;
+};
+
+EventEmitter.prototype.emit = function(type) {
+  var er, handler, len, args, i, listeners;
+
+  if (!this._events)
+    this._events = {};
+
+  // If there is no 'error' event listener then throw.
+  if (type === 'error') {
+    if (!this._events.error ||
+        (isObject(this._events.error) && !this._events.error.length)) {
+      er = arguments[1];
+      if (er instanceof Error) {
+        throw er; // Unhandled 'error' event
       } else {
-        foundIndex = -1
+        // At least give some kind of context to the user
+        var err = new Error('Uncaught, unspecified "error" event. (' + er + ')');
+        err.context = er;
+        throw err;
       }
     }
-    return -1
   }
 
-  throw new TypeError('val must be string, number or Buffer')
-}
-
-// `get` is deprecated
-Buffer.prototype.get = function get (offset) {
-  console.log('.get() is deprecated. Access using array indexes instead.')
-  return this.readUInt8(offset)
-}
+  handler = this._events[type];
 
-// `set` is deprecated
-Buffer.prototype.set = function set (v, offset) {
-  console.log('.set() is deprecated. Access using array indexes instead.')
-  return this.writeUInt8(v, offset)
-}
+  if (isUndefined(handler))
+    return false;
 
-function hexWrite (buf, string, offset, length) {
-  offset = Number(offset) || 0
-  var remaining = buf.length - offset
-  if (!length) {
-    length = remaining
-  } else {
-    length = Number(length)
-    if (length > remaining) {
-      length = remaining
+  if (isFunction(handler)) {
+    switch (arguments.length) {
+      // fast cases
+      case 1:
+        handler.call(this);
+        break;
+      case 2:
+        handler.call(this, arguments[1]);
+        break;
+      case 3:
+        handler.call(this, arguments[1], arguments[2]);
+        break;
+      // slower
+      default:
+        args = Array.prototype.slice.call(arguments, 1);
+        handler.apply(this, args);
     }
+  } else if (isObject(handler)) {
+    args = Array.prototype.slice.call(arguments, 1);
+    listeners = handler.slice();
+    len = listeners.length;
+    for (i = 0; i < len; i++)
+      listeners[i].apply(this, args);
   }
 
-  // must be an even number of digits
-  var strLen = string.length
-  if (strLen % 2 !== 0) throw new Error('Invalid hex string')
+  return true;
+};
 
-  if (length > strLen / 2) {
-    length = strLen / 2
-  }
-  for (var i = 0; i < length; i++) {
-    var parsed = parseInt(string.substr(i * 2, 2), 16)
-    if (isNaN(parsed)) throw new Error('Invalid hex string')
-    buf[offset + i] = parsed
+EventEmitter.prototype.addListener = function(type, listener) {
+  var m;
+
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
+
+  if (!this._events)
+    this._events = {};
+
+  // To avoid recursion in the case that type === "newListener"! Before
+  // adding it to the listeners, first emit "newListener".
+  if (this._events.newListener)
+    this.emit('newListener', type,
+              isFunction(listener.listener) ?
+              listener.listener : listener);
+
+  if (!this._events[type])
+    // Optimize the case of one listener. Don't need the extra array object.
+    this._events[type] = listener;
+  else if (isObject(this._events[type]))
+    // If we've already got an array, just append.
+    this._events[type].push(listener);
+  else
+    // Adding the second element, need to change to array.
+    this._events[type] = [this._events[type], listener];
+
+  // Check for listener leak
+  if (isObject(this._events[type]) && !this._events[type].warned) {
+    if (!isUndefined(this._maxListeners)) {
+      m = this._maxListeners;
+    } else {
+      m = EventEmitter.defaultMaxListeners;
+    }
+
+    if (m && m > 0 && this._events[type].length > m) {
+      this._events[type].warned = true;
+      console.error('(node) warning: possible EventEmitter memory ' +
+                    'leak detected. %d listeners added. ' +
+                    'Use emitter.setMaxListeners() to increase limit.',
+                    this._events[type].length);
+      if (typeof console.trace === 'function') {
+        // not supported in IE 10
+        console.trace();
+      }
+    }
   }
-  return i
-}
 
-function utf8Write (buf, string, offset, length) {
-  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
-}
+  return this;
+};
 
-function asciiWrite (buf, string, offset, length) {
-  return blitBuffer(asciiToBytes(string), buf, offset, length)
-}
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
 
-function binaryWrite (buf, string, offset, length) {
-  return asciiWrite(buf, string, offset, length)
-}
+EventEmitter.prototype.once = function(type, listener) {
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
 
-function base64Write (buf, string, offset, length) {
-  return blitBuffer(base64ToBytes(string), buf, offset, length)
-}
+  var fired = false;
 
-function ucs2Write (buf, string, offset, length) {
-  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
-}
+  function g() {
+    this.removeListener(type, g);
 
-Buffer.prototype.write = function write (string, offset, length, encoding) {
-  // Buffer#write(string)
-  if (offset === undefined) {
-    encoding = 'utf8'
-    length = this.length
-    offset = 0
-  // Buffer#write(string, encoding)
-  } else if (length === undefined && typeof offset === 'string') {
-    encoding = offset
-    length = this.length
-    offset = 0
-  // Buffer#write(string, offset[, length][, encoding])
-  } else if (isFinite(offset)) {
-    offset = offset | 0
-    if (isFinite(length)) {
-      length = length | 0
-      if (encoding === undefined) encoding = 'utf8'
-    } else {
-      encoding = length
-      length = undefined
+    if (!fired) {
+      fired = true;
+      listener.apply(this, arguments);
     }
-  // legacy write(string, encoding, offset, length) - remove in v0.13
-  } else {
-    var swap = encoding
-    encoding = offset
-    offset = length | 0
-    length = swap
   }
 
-  var remaining = this.length - offset
-  if (length === undefined || length > remaining) length = remaining
+  g.listener = listener;
+  this.on(type, g);
 
-  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
-    throw new RangeError('attempt to write outside buffer bounds')
-  }
+  return this;
+};
 
-  if (!encoding) encoding = 'utf8'
+// emits a 'removeListener' event iff the listener was removed
+EventEmitter.prototype.removeListener = function(type, listener) {
+  var list, position, length, i;
 
-  var loweredCase = false
-  for (;;) {
-    switch (encoding) {
-      case 'hex':
-        return hexWrite(this, string, offset, length)
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
 
-      case 'utf8':
-      case 'utf-8':
-        return utf8Write(this, string, offset, length)
+  if (!this._events || !this._events[type])
+    return this;
 
-      case 'ascii':
-        return asciiWrite(this, string, offset, length)
+  list = this._events[type];
+  length = list.length;
+  position = -1;
 
-      case 'binary':
-        return binaryWrite(this, string, offset, length)
+  if (list === listener ||
+      (isFunction(list.listener) && list.listener === listener)) {
+    delete this._events[type];
+    if (this._events.removeListener)
+      this.emit('removeListener', type, listener);
 
-      case 'base64':
-        // Warning: maxLength not taken into account in base64Write
-        return base64Write(this, string, offset, length)
+  } else if (isObject(list)) {
+    for (i = length; i-- > 0;) {
+      if (list[i] === listener ||
+          (list[i].listener && list[i].listener === listener)) {
+        position = i;
+        break;
+      }
+    }
 
-      case 'ucs2':
-      case 'ucs-2':
-      case 'utf16le':
-      case 'utf-16le':
-        return ucs2Write(this, string, offset, length)
+    if (position < 0)
+      return this;
 
-      default:
-        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
-        encoding = ('' + encoding).toLowerCase()
-        loweredCase = true
+    if (list.length === 1) {
+      list.length = 0;
+      delete this._events[type];
+    } else {
+      list.splice(position, 1);
     }
-  }
-}
 
-Buffer.prototype.toJSON = function toJSON () {
-  return {
-    type: 'Buffer',
-    data: Array.prototype.slice.call(this._arr || this, 0)
+    if (this._events.removeListener)
+      this.emit('removeListener', type, listener);
   }
-}
 
-function base64Slice (buf, start, end) {
-  if (start === 0 && end === buf.length) {
-    return base64.fromByteArray(buf)
-  } else {
-    return base64.fromByteArray(buf.slice(start, end))
-  }
-}
+  return this;
+};
 
-function utf8Slice (buf, start, end) {
-  end = Math.min(buf.length, end)
-  var firstByte
-  var secondByte
-  var thirdByte
-  var fourthByte
-  var bytesPerSequence
-  var tempCodePoint
-  var codePoint
-  var res = []
-  var i = start
+EventEmitter.prototype.removeAllListeners = function(type) {
+  var key, listeners;
 
-  for (; i < end; i += bytesPerSequence) {
-    firstByte = buf[i]
-    codePoint = 0xFFFD
+  if (!this._events)
+    return this;
 
-    if (firstByte > 0xEF) {
-      bytesPerSequence = 4
-    } else if (firstByte > 0xDF) {
-      bytesPerSequence = 3
-    } else if (firstByte > 0xBF) {
-      bytesPerSequence = 2
-    } else {
-      bytesPerSequence = 1
-    }
+  // not listening for removeListener, no need to emit
+  if (!this._events.removeListener) {
+    if (arguments.length === 0)
+      this._events = {};
+    else if (this._events[type])
+      delete this._events[type];
+    return this;
+  }
 
-    if (i + bytesPerSequence <= end) {
-      switch (bytesPerSequence) {
-        case 1:
-          if (firstByte < 0x80) {
-            codePoint = firstByte
-          }
-          break
-        case 2:
-          secondByte = buf[i + 1]
-          if ((secondByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
-            if (tempCodePoint > 0x7F) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 3:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
-            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
-              codePoint = tempCodePoint
-            }
-          }
-          break
-        case 4:
-          secondByte = buf[i + 1]
-          thirdByte = buf[i + 2]
-          fourthByte = buf[i + 3]
-          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
-            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
-            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
-              codePoint = tempCodePoint
-            }
-          }
-      }
+  // emit removeListener for all listeners on all events
+  if (arguments.length === 0) {
+    for (key in this._events) {
+      if (key === 'removeListener') continue;
+      this.removeAllListeners(key);
     }
+    this.removeAllListeners('removeListener');
+    this._events = {};
+    return this;
+  }
 
-    if (codePoint === 0xFFFD) {
-      // we generated an invalid codePoint so make sure to only advance by 1 byte
-      bytesPerSequence = 1
-    } else if (codePoint > 0xFFFF) {
-      // encode to utf16 (surrogate pair dance)
-      codePoint -= 0x10000
-      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
-      codePoint = 0xDC00 | codePoint & 0x3FF
-    }
+  listeners = this._events[type];
 
-    res.push(codePoint)
+  if (isFunction(listeners)) {
+    this.removeListener(type, listeners);
+  } else if (listeners) {
+    // LIFO order
+    while (listeners.length)
+      this.removeListener(type, listeners[listeners.length - 1]);
   }
+  delete this._events[type];
 
-  return String.fromCharCode.apply(String, res)
-}
+  return this;
+};
+
+EventEmitter.prototype.listeners = function(type) {
+  var ret;
+  if (!this._events || !this._events[type])
+    ret = [];
+  else if (isFunction(this._events[type]))
+    ret = [this._events[type]];
+  else
+    ret = this._events[type].slice();
+  return ret;
+};
 
-function asciiSlice (buf, start, end) {
-  var ret = ''
-  end = Math.min(buf.length, end)
+EventEmitter.prototype.listenerCount = function(type) {
+  if (this._events) {
+    var evlistener = this._events[type];
 
-  for (var i = start; i < end; i++) {
-    ret += String.fromCharCode(buf[i] & 0x7F)
+    if (isFunction(evlistener))
+      return 1;
+    else if (evlistener)
+      return evlistener.length;
   }
-  return ret
-}
+  return 0;
+};
 
-function binarySlice (buf, start, end) {
-  var ret = ''
-  end = Math.min(buf.length, end)
+EventEmitter.listenerCount = function(emitter, type) {
+  return emitter.listenerCount(type);
+};
 
-  for (var i = start; i < end; i++) {
-    ret += String.fromCharCode(buf[i])
-  }
-  return ret
+function isFunction(arg) {
+  return typeof arg === 'function';
 }
 
-function hexSlice (buf, start, end) {
-  var len = buf.length
-
-  if (!start || start < 0) start = 0
-  if (!end || end < 0 || end > len) end = len
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
 
-  var out = ''
-  for (var i = start; i < end; i++) {
-    out += toHex(buf[i])
-  }
-  return out
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
 }
 
-function utf16leSlice (buf, start, end) {
-  var bytes = buf.slice(start, end)
-  var res = ''
-  for (var i = 0; i < bytes.length; i += 2) {
-    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
-  }
-  return res
+function isUndefined(arg) {
+  return arg === void 0;
 }
 
-Buffer.prototype.slice = function slice (start, end) {
-  var len = this.length
-  start = ~~start
-  end = end === undefined ? len : ~~end
+},{}],8:[function(require,module,exports){
+exports.read = function (buffer, offset, isLE, mLen, nBytes) {
+  var e, m
+  var eLen = nBytes * 8 - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var nBits = -7
+  var i = isLE ? (nBytes - 1) : 0
+  var d = isLE ? -1 : 1
+  var s = buffer[offset + i]
 
-  if (start < 0) {
-    start += len
-    if (start < 0) start = 0
-  } else if (start > len) {
-    start = len
-  }
+  i += d
 
-  if (end < 0) {
-    end += len
-    if (end < 0) end = 0
-  } else if (end > len) {
-    end = len
-  }
+  e = s & ((1 << (-nBits)) - 1)
+  s >>= (-nBits)
+  nBits += eLen
+  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-  if (end < start) end = start
+  m = e & ((1 << (-nBits)) - 1)
+  e >>= (-nBits)
+  nBits += mLen
+  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-  var newBuf
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    newBuf = Buffer._augment(this.subarray(start, end))
+  if (e === 0) {
+    e = 1 - eBias
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity)
   } else {
-    var sliceLen = end - start
-    newBuf = new Buffer(sliceLen, undefined)
-    for (var i = 0; i < sliceLen; i++) {
-      newBuf[i] = this[i + start]
-    }
+    m = m + Math.pow(2, mLen)
+    e = e - eBias
   }
-
-  if (newBuf.length) newBuf.parent = this.parent || this
-
-  return newBuf
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
 }
 
-/*
- * Need to make sure that buffer isn't trying to write out of bounds.
- */
-function checkOffset (offset, ext, length) {
-  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
-  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
-}
+exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c
+  var eLen = nBytes * 8 - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
+  var i = isLE ? 0 : (nBytes - 1)
+  var d = isLE ? 1 : -1
+  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
 
-Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
+  value = Math.abs(value)
 
-  var val = this[offset]
-  var mul = 1
-  var i = 0
-  while (++i < byteLength && (mul *= 0x100)) {
-    val += this[offset + i] * mul
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0
+    e = eMax
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2)
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--
+      c *= 2
+    }
+    if (e + eBias >= 1) {
+      value += rt / c
+    } else {
+      value += rt * Math.pow(2, 1 - eBias)
+    }
+    if (value * c >= 2) {
+      e++
+      c /= 2
+    }
+
+    if (e + eBias >= eMax) {
+      m = 0
+      e = eMax
+    } else if (e + eBias >= 1) {
+      m = (value * c - 1) * Math.pow(2, mLen)
+      e = e + eBias
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
+      e = 0
+    }
   }
 
-  return val
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+
+  e = (e << mLen) | m
+  eLen += mLen
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+
+  buffer[offset + i - d] |= s * 128
 }
 
-Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) {
-    checkOffset(offset, byteLength, this.length)
+},{}],9:[function(require,module,exports){
+if (typeof Object.create === 'function') {
+  // implementation from standard node.js 'util' module
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    ctor.prototype = Object.create(superCtor.prototype, {
+      constructor: {
+        value: ctor,
+        enumerable: false,
+        writable: true,
+        configurable: true
+      }
+    });
+  };
+} else {
+  // old school shim for old browsers
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    var TempCtor = function () {}
+    TempCtor.prototype = superCtor.prototype
+    ctor.prototype = new TempCtor()
+    ctor.prototype.constructor = ctor
   }
+}
 
-  var val = this[offset + --byteLength]
-  var mul = 1
-  while (byteLength > 0 && (mul *= 0x100)) {
-    val += this[offset + --byteLength] * mul
-  }
+},{}],10:[function(require,module,exports){
+/*!
+ * Determine if an object is a Buffer
+ *
+ * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
+ * @license  MIT
+ */
 
-  return val
+// The _isBuffer check is for Safari 5-7 support, because it's missing
+// Object.prototype.constructor. Remove this eventually
+module.exports = function (obj) {
+  return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
 }
 
-Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  return this[offset]
+function isBuffer (obj) {
+  return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
 }
 
-Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return this[offset] | (this[offset + 1] << 8)
+// For Node v0.10 support. Remove this eventually.
+function isSlowBuffer (obj) {
+  return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
 }
 
-Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  return (this[offset] << 8) | this[offset + 1]
+},{}],11:[function(require,module,exports){
+var toString = {}.toString;
+
+module.exports = Array.isArray || function (arr) {
+  return toString.call(arr) == '[object Array]';
+};
+
+},{}],12:[function(require,module,exports){
+(function (process){
+'use strict';
+
+if (!process.version ||
+    process.version.indexOf('v0.') === 0 ||
+    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {
+  module.exports = nextTick;
+} else {
+  module.exports = process.nextTick;
+}
+
+function nextTick(fn, arg1, arg2, arg3) {
+  if (typeof fn !== 'function') {
+    throw new TypeError('"callback" argument must be a function');
+  }
+  var len = arguments.length;
+  var args, i;
+  switch (len) {
+  case 0:
+  case 1:
+    return process.nextTick(fn);
+  case 2:
+    return process.nextTick(function afterTickOne() {
+      fn.call(null, arg1);
+    });
+  case 3:
+    return process.nextTick(function afterTickTwo() {
+      fn.call(null, arg1, arg2);
+    });
+  case 4:
+    return process.nextTick(function afterTickThree() {
+      fn.call(null, arg1, arg2, arg3);
+    });
+  default:
+    args = new Array(len - 1);
+    i = 0;
+    while (i < args.length) {
+      args[i++] = arguments[i];
+    }
+    return process.nextTick(function afterTick() {
+      fn.apply(null, args);
+    });
+  }
 }
 
-Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
+}).call(this,require('_process'))
+},{"_process":13}],13:[function(require,module,exports){
+// shim for using process in browser
+var process = module.exports = {};
 
-  return ((this[offset]) |
-      (this[offset + 1] << 8) |
-      (this[offset + 2] << 16)) +
-      (this[offset + 3] * 0x1000000)
+// cached from whatever global is present so that test runners that stub it
+// don't break things.  But we need to wrap it in a try catch in case it is
+// wrapped in strict mode code which doesn't define any globals.  It's inside a
+// function because try/catches deoptimize in certain engines.
+
+var cachedSetTimeout;
+var cachedClearTimeout;
+
+function defaultSetTimout() {
+    throw new Error('setTimeout has not been defined');
+}
+function defaultClearTimeout () {
+    throw new Error('clearTimeout has not been defined');
 }
+(function () {
+    try {
+        if (typeof setTimeout === 'function') {
+            cachedSetTimeout = setTimeout;
+        } else {
+            cachedSetTimeout = defaultSetTimout;
+        }
+    } catch (e) {
+        cachedSetTimeout = defaultSetTimout;
+    }
+    try {
+        if (typeof clearTimeout === 'function') {
+            cachedClearTimeout = clearTimeout;
+        } else {
+            cachedClearTimeout = defaultClearTimeout;
+        }
+    } catch (e) {
+        cachedClearTimeout = defaultClearTimeout;
+    }
+} ())
+function runTimeout(fun) {
+    if (cachedSetTimeout === setTimeout) {
+        //normal enviroments in sane situations
+        return setTimeout(fun, 0);
+    }
+    // if setTimeout wasn't available but was latter defined
+    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+        cachedSetTimeout = setTimeout;
+        return setTimeout(fun, 0);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedSetTimeout(fun, 0);
+    } catch(e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+            return cachedSetTimeout.call(null, fun, 0);
+        } catch(e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
+            return cachedSetTimeout.call(this, fun, 0);
+        }
+    }
 
-Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
 
-  return (this[offset] * 0x1000000) +
-    ((this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    this[offset + 3])
 }
+function runClearTimeout(marker) {
+    if (cachedClearTimeout === clearTimeout) {
+        //normal enviroments in sane situations
+        return clearTimeout(marker);
+    }
+    // if clearTimeout wasn't available but was latter defined
+    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+        cachedClearTimeout = clearTimeout;
+        return clearTimeout(marker);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedClearTimeout(marker);
+    } catch (e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
+            return cachedClearTimeout.call(null, marker);
+        } catch (e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
+            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
+            return cachedClearTimeout.call(this, marker);
+        }
+    }
 
-Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
 
-  var val = this[offset]
-  var mul = 1
-  var i = 0
-  while (++i < byteLength && (mul *= 0x100)) {
-    val += this[offset + i] * mul
-  }
-  mul *= 0x80
 
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+}
+var queue = [];
+var draining = false;
+var currentQueue;
+var queueIndex = -1;
 
-  return val
+function cleanUpNextTick() {
+    if (!draining || !currentQueue) {
+        return;
+    }
+    draining = false;
+    if (currentQueue.length) {
+        queue = currentQueue.concat(queue);
+    } else {
+        queueIndex = -1;
+    }
+    if (queue.length) {
+        drainQueue();
+    }
 }
 
-Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkOffset(offset, byteLength, this.length)
+function drainQueue() {
+    if (draining) {
+        return;
+    }
+    var timeout = runTimeout(cleanUpNextTick);
+    draining = true;
 
-  var i = byteLength
-  var mul = 1
-  var val = this[offset + --i]
-  while (i > 0 && (mul *= 0x100)) {
-    val += this[offset + --i] * mul
-  }
-  mul *= 0x80
+    var len = queue.length;
+    while(len) {
+        currentQueue = queue;
+        queue = [];
+        while (++queueIndex < len) {
+            if (currentQueue) {
+                currentQueue[queueIndex].run();
+            }
+        }
+        queueIndex = -1;
+        len = queue.length;
+    }
+    currentQueue = null;
+    draining = false;
+    runClearTimeout(timeout);
+}
 
-  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+process.nextTick = function (fun) {
+    var args = new Array(arguments.length - 1);
+    if (arguments.length > 1) {
+        for (var i = 1; i < arguments.length; i++) {
+            args[i - 1] = arguments[i];
+        }
+    }
+    queue.push(new Item(fun, args));
+    if (queue.length === 1 && !draining) {
+        runTimeout(drainQueue);
+    }
+};
 
-  return val
+// v8 likes predictible objects
+function Item(fun, array) {
+    this.fun = fun;
+    this.array = array;
 }
+Item.prototype.run = function () {
+    this.fun.apply(null, this.array);
+};
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+process.version = ''; // empty string to avoid regexp issues
+process.versions = {};
 
-Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 1, this.length)
-  if (!(this[offset] & 0x80)) return (this[offset])
-  return ((0xff - this[offset] + 1) * -1)
-}
+function noop() {}
 
-Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset] | (this[offset + 1] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
 
-Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 2, this.length)
-  var val = this[offset + 1] | (this[offset] << 8)
-  return (val & 0x8000) ? val | 0xFFFF0000 : val
-}
+process.binding = function (name) {
+    throw new Error('process.binding is not supported');
+};
 
-Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
+process.cwd = function () { return '/' };
+process.chdir = function (dir) {
+    throw new Error('process.chdir is not supported');
+};
+process.umask = function() { return 0; };
 
-  return (this[offset]) |
-    (this[offset + 1] << 8) |
-    (this[offset + 2] << 16) |
-    (this[offset + 3] << 24)
-}
+},{}],14:[function(require,module,exports){
+module.exports = require("./lib/_stream_duplex.js")
 
-Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
+},{"./lib/_stream_duplex.js":15}],15:[function(require,module,exports){
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototypal inheritance, this class
+// prototypally inherits from Readable, and then parasitically from
+// Writable.
 
-  return (this[offset] << 24) |
-    (this[offset + 1] << 16) |
-    (this[offset + 2] << 8) |
-    (this[offset + 3])
-}
+'use strict';
 
-Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, true, 23, 4)
-}
+/*<replacement>*/
 
-Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 4, this.length)
-  return ieee754.read(this, offset, false, 23, 4)
-}
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) {
+    keys.push(key);
+  }return keys;
+};
+/*</replacement>*/
 
-Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, true, 52, 8)
-}
+module.exports = Duplex;
 
-Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
-  if (!noAssert) checkOffset(offset, 8, this.length)
-  return ieee754.read(this, offset, false, 52, 8)
-}
+/*<replacement>*/
+var processNextTick = require('process-nextick-args');
+/*</replacement>*/
 
-function checkInt (buf, value, offset, ext, max, min) {
-  if (!Buffer.isBuffer(buf)) throw new TypeError('buffer must be a Buffer instance')
-  if (value > max || value < min) throw new RangeError('value is out of bounds')
-  if (offset + ext > buf.length) throw new RangeError('index out of range')
-}
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
 
-Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
+var Readable = require('./_stream_readable');
+var Writable = require('./_stream_writable');
 
-  var mul = 1
-  var i = 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
-  }
+util.inherits(Duplex, Readable);
 
-  return offset + byteLength
+var keys = objectKeys(Writable.prototype);
+for (var v = 0; v < keys.length; v++) {
+  var method = keys[v];
+  if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
 }
 
-Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  byteLength = byteLength | 0
-  if (!noAssert) checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 0)
+function Duplex(options) {
+  if (!(this instanceof Duplex)) return new Duplex(options);
 
-  var i = byteLength - 1
-  var mul = 1
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    this[offset + i] = (value / mul) & 0xFF
-  }
+  Readable.call(this, options);
+  Writable.call(this, options);
 
-  return offset + byteLength
-}
+  if (options && options.readable === false) this.readable = false;
 
-Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  this[offset] = value
-  return offset + 1
-}
+  if (options && options.writable === false) this.writable = false;
 
-function objectWriteUInt16 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {
-    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
-      (littleEndian ? i : 1 - i) * 8
-  }
-}
+  this.allowHalfOpen = true;
+  if (options && options.allowHalfOpen === false) this.allowHalfOpen = false;
 
-Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = value
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
+  this.once('end', onend);
 }
 
-Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = value
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
+// the no-half-open enforcer
+function onend() {
+  // if we allow half-open state, or if the writable side ended,
+  // then we're ok.
+  if (this.allowHalfOpen || this._writableState.ended) return;
 
-function objectWriteUInt32 (buf, value, offset, littleEndian) {
-  if (value < 0) value = 0xffffffff + value + 1
-  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {
-    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
-  }
+  // no more data can be written.
+  // But allow more writes to happen in this tick.
+  processNextTick(onEndNT, this);
 }
 
-Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset + 3] = (value >>> 24)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 1] = (value >>> 8)
-    this[offset] = value
-  } else {
-    objectWriteUInt32(this, value, offset, true)
-  }
-  return offset + 4
+function onEndNT(self) {
+  self.end();
 }
 
-Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = value
-  } else {
-    objectWriteUInt32(this, value, offset, false)
+function forEach(xs, f) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    f(xs[i], i);
   }
-  return offset + 4
 }
+},{"./_stream_readable":17,"./_stream_writable":19,"core-util-is":6,"inherits":9,"process-nextick-args":12}],16:[function(require,module,exports){
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
 
-Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
+'use strict';
 
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
+module.exports = PassThrough;
 
-  var i = 0
-  var mul = 1
-  var sub = value < 0 ? 1 : 0
-  this[offset] = value & 0xFF
-  while (++i < byteLength && (mul *= 0x100)) {
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
+var Transform = require('./_stream_transform');
 
-  return offset + byteLength
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+util.inherits(PassThrough, Transform);
+
+function PassThrough(options) {
+  if (!(this instanceof PassThrough)) return new PassThrough(options);
+
+  Transform.call(this, options);
 }
 
-Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) {
-    var limit = Math.pow(2, 8 * byteLength - 1)
+PassThrough.prototype._transform = function (chunk, encoding, cb) {
+  cb(null, chunk);
+};
+},{"./_stream_transform":18,"core-util-is":6,"inherits":9}],17:[function(require,module,exports){
+(function (process){
+'use strict';
 
-    checkInt(this, value, offset, byteLength, limit - 1, -limit)
-  }
+module.exports = Readable;
 
-  var i = byteLength - 1
-  var mul = 1
-  var sub = value < 0 ? 1 : 0
-  this[offset + i] = value & 0xFF
-  while (--i >= 0 && (mul *= 0x100)) {
-    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
-  }
+/*<replacement>*/
+var processNextTick = require('process-nextick-args');
+/*</replacement>*/
 
-  return offset + byteLength
-}
+/*<replacement>*/
+var isArray = require('isarray');
+/*</replacement>*/
 
-Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
-  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
-  if (value < 0) value = 0xff + value + 1
-  this[offset] = value
-  return offset + 1
-}
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
 
-Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = value
-    this[offset + 1] = (value >>> 8)
-  } else {
-    objectWriteUInt16(this, value, offset, true)
-  }
-  return offset + 2
-}
+Readable.ReadableState = ReadableState;
 
-Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 8)
-    this[offset + 1] = value
-  } else {
-    objectWriteUInt16(this, value, offset, false)
-  }
-  return offset + 2
-}
+/*<replacement>*/
+var EE = require('events').EventEmitter;
 
-Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = value
-    this[offset + 1] = (value >>> 8)
-    this[offset + 2] = (value >>> 16)
-    this[offset + 3] = (value >>> 24)
-  } else {
-    objectWriteUInt32(this, value, offset, true)
+var EElistenerCount = function (emitter, type) {
+  return emitter.listeners(type).length;
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream;
+(function () {
+  try {
+    Stream = require('st' + 'ream');
+  } catch (_) {} finally {
+    if (!Stream) Stream = require('events').EventEmitter;
   }
-  return offset + 4
+})();
+/*</replacement>*/
+
+var Buffer = require('buffer').Buffer;
+/*<replacement>*/
+var bufferShim = require('buffer-shims');
+/*</replacement>*/
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+/*<replacement>*/
+var debugUtil = require('util');
+var debug = void 0;
+if (debugUtil && debugUtil.debuglog) {
+  debug = debugUtil.debuglog('stream');
+} else {
+  debug = function () {};
 }
+/*</replacement>*/
 
-Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
-  value = +value
-  offset = offset | 0
-  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
-  if (value < 0) value = 0xffffffff + value + 1
-  if (Buffer.TYPED_ARRAY_SUPPORT) {
-    this[offset] = (value >>> 24)
-    this[offset + 1] = (value >>> 16)
-    this[offset + 2] = (value >>> 8)
-    this[offset + 3] = value
+var BufferList = require('./internal/streams/BufferList');
+var StringDecoder;
+
+util.inherits(Readable, Stream);
+
+function prependListener(emitter, event, fn) {
+  // Sadly this is not cacheable as some libraries bundle their own
+  // event emitter implementation with them.
+  if (typeof emitter.prependListener === 'function') {
+    return emitter.prependListener(event, fn);
   } else {
-    objectWriteUInt32(this, value, offset, false)
+    // This is a hack to make sure that our error handler is attached before any
+    // userland ones.  NEVER DO THIS. This is here only because this code needs
+    // to continue to work with older versions of Node.js that do not include
+    // the prependListener() method. The goal is to eventually remove this hack.
+    if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
   }
-  return offset + 4
 }
 
-function checkIEEE754 (buf, value, offset, ext, max, min) {
-  if (value > max || value < min) throw new RangeError('value is out of bounds')
-  if (offset + ext > buf.length) throw new RangeError('index out of range')
-  if (offset < 0) throw new RangeError('index out of range')
-}
+function ReadableState(options, stream) {
+  Duplex = Duplex || require('./_stream_duplex');
 
-function writeFloat (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 23, 4)
-  return offset + 4
-}
+  options = options || {};
 
-Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, true, noAssert)
-}
+  // object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away
+  this.objectMode = !!options.objectMode;
 
-Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
-  return writeFloat(this, value, offset, false, noAssert)
-}
+  if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.readableObjectMode;
 
-function writeDouble (buf, value, offset, littleEndian, noAssert) {
-  if (!noAssert) {
-    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
-  }
-  ieee754.write(buf, value, offset, littleEndian, 52, 8)
-  return offset + 8
+  // the point at which it stops calling _read() to fill the buffer
+  // Note: 0 is a valid value, means "don't call _read preemptively ever"
+  var hwm = options.highWaterMark;
+  var defaultHwm = this.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm;
+
+  // cast to ints.
+  this.highWaterMark = ~ ~this.highWaterMark;
+
+  // A linked list is used to store data chunks instead of an array because the
+  // linked list can remove elements from the beginning faster than
+  // array.shift()
+  this.buffer = new BufferList();
+  this.length = 0;
+  this.pipes = null;
+  this.pipesCount = 0;
+  this.flowing = null;
+  this.ended = false;
+  this.endEmitted = false;
+  this.reading = false;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // whenever we return null, then we set a flag to say
+  // that we're awaiting a 'readable' event emission.
+  this.needReadable = false;
+  this.emittedReadable = false;
+  this.readableListening = false;
+  this.resumeScheduled = false;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // when piping, we only care about 'readable' events that happen
+  // after read()ing all the bytes and not getting any pushback.
+  this.ranOut = false;
+
+  // the number of writers that are awaiting a drain event in .pipe()s
+  this.awaitDrain = 0;
+
+  // if true, a maybeReadMore has been scheduled
+  this.readingMore = false;
+
+  this.decoder = null;
+  this.encoding = null;
+  if (options.encoding) {
+    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+    this.decoder = new StringDecoder(options.encoding);
+    this.encoding = options.encoding;
+  }
 }
 
-Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, true, noAssert)
-}
+function Readable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
 
-Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
-  return writeDouble(this, value, offset, false, noAssert)
-}
+  if (!(this instanceof Readable)) return new Readable(options);
 
-// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
-Buffer.prototype.copy = function copy (target, targetStart, start, end) {
-  if (!start) start = 0
-  if (!end && end !== 0) end = this.length
-  if (targetStart >= target.length) targetStart = target.length
-  if (!targetStart) targetStart = 0
-  if (end > 0 && end < start) end = start
+  this._readableState = new ReadableState(options, this);
 
-  // Copy 0 bytes; we're done
-  if (end === start) return 0
-  if (target.length === 0 || this.length === 0) return 0
+  // legacy
+  this.readable = true;
 
-  // Fatal error conditions
-  if (targetStart < 0) {
-    throw new RangeError('targetStart out of bounds')
-  }
-  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
-  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+  if (options && typeof options.read === 'function') this._read = options.read;
 
-  // Are we oob?
-  if (end > this.length) end = this.length
-  if (target.length - targetStart < end - start) {
-    end = target.length - targetStart + start
-  }
+  Stream.call(this);
+}
 
-  var len = end - start
-  var i
+// Manually shove something into the read() buffer.
+// This returns true if the highWaterMark has not been hit yet,
+// similar to how Writable.write() returns true if you should
+// write() some more.
+Readable.prototype.push = function (chunk, encoding) {
+  var state = this._readableState;
 
-  if (this === target && start < targetStart && targetStart < end) {
-    // descending copy from end
-    for (i = len - 1; i >= 0; i--) {
-      target[i + targetStart] = this[i + start]
-    }
-  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
-    // ascending copy from start
-    for (i = 0; i < len; i++) {
-      target[i + targetStart] = this[i + start]
+  if (!state.objectMode && typeof chunk === 'string') {
+    encoding = encoding || state.defaultEncoding;
+    if (encoding !== state.encoding) {
+      chunk = bufferShim.from(chunk, encoding);
+      encoding = '';
     }
-  } else {
-    target._set(this.subarray(start, start + len), targetStart)
   }
 
-  return len
-}
-
-// fill(value, start=0, end=buffer.length)
-Buffer.prototype.fill = function fill (value, start, end) {
-  if (!value) value = 0
-  if (!start) start = 0
-  if (!end) end = this.length
+  return readableAddChunk(this, state, chunk, encoding, false);
+};
 
-  if (end < start) throw new RangeError('end < start')
+// Unshift should *always* be something directly out of read()
+Readable.prototype.unshift = function (chunk) {
+  var state = this._readableState;
+  return readableAddChunk(this, state, chunk, '', true);
+};
 
-  // Fill 0 bytes; we're done
-  if (end === start) return
-  if (this.length === 0) return
+Readable.prototype.isPaused = function () {
+  return this._readableState.flowing === false;
+};
 
-  if (start < 0 || start >= this.length) throw new RangeError('start out of bounds')
-  if (end < 0 || end > this.length) throw new RangeError('end out of bounds')
+function readableAddChunk(stream, state, chunk, encoding, addToFront) {
+  var er = chunkInvalid(state, chunk);
+  if (er) {
+    stream.emit('error', er);
+  } else if (chunk === null) {
+    state.reading = false;
+    onEofChunk(stream, state);
+  } else if (state.objectMode || chunk && chunk.length > 0) {
+    if (state.ended && !addToFront) {
+      var e = new Error('stream.push() after EOF');
+      stream.emit('error', e);
+    } else if (state.endEmitted && addToFront) {
+      var _e = new Error('stream.unshift() after end event');
+      stream.emit('error', _e);
+    } else {
+      var skipAdd;
+      if (state.decoder && !addToFront && !encoding) {
+        chunk = state.decoder.write(chunk);
+        skipAdd = !state.objectMode && chunk.length === 0;
+      }
 
-  var i
-  if (typeof value === 'number') {
-    for (i = start; i < end; i++) {
-      this[i] = value
-    }
-  } else {
-    var bytes = utf8ToBytes(value.toString())
-    var len = bytes.length
-    for (i = start; i < end; i++) {
-      this[i] = bytes[i % len]
-    }
-  }
+      if (!addToFront) state.reading = false;
 
-  return this
-}
+      // Don't add to the buffer if we've decoded to an empty string chunk and
+      // we're not in object mode
+      if (!skipAdd) {
+        // if we want the data now, just emit it.
+        if (state.flowing && state.length === 0 && !state.sync) {
+          stream.emit('data', chunk);
+          stream.read(0);
+        } else {
+          // update the buffer info.
+          state.length += state.objectMode ? 1 : chunk.length;
+          if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
 
-/**
- * Creates a new `ArrayBuffer` with the *copied* memory of the buffer instance.
- * Added in Node 0.12. Only available in browsers that support ArrayBuffer.
- */
-Buffer.prototype.toArrayBuffer = function toArrayBuffer () {
-  if (typeof Uint8Array !== 'undefined') {
-    if (Buffer.TYPED_ARRAY_SUPPORT) {
-      return (new Buffer(this)).buffer
-    } else {
-      var buf = new Uint8Array(this.length)
-      for (var i = 0, len = buf.length; i < len; i += 1) {
-        buf[i] = this[i]
+          if (state.needReadable) emitReadable(stream);
+        }
       }
-      return buf.buffer
+
+      maybeReadMore(stream, state);
     }
-  } else {
-    throw new TypeError('Buffer.toArrayBuffer not supported in this browser')
+  } else if (!addToFront) {
+    state.reading = false;
   }
+
+  return needMoreData(state);
 }
 
-// HELPER FUNCTIONS
-// ================
+// if it's past the high water mark, we can push in some more.
+// Also, if we have no data yet, we can stand some
+// more bytes.  This is to work around cases where hwm=0,
+// such as the repl.  Also, if the push() triggered a
+// readable event, and the user called read(largeNumber) such that
+// needReadable was set, then we ought to push more, so that another
+// 'readable' event will be triggered.
+function needMoreData(state) {
+  return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0);
+}
 
-var BP = Buffer.prototype
+// backwards compatibility.
+Readable.prototype.setEncoding = function (enc) {
+  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+  this._readableState.decoder = new StringDecoder(enc);
+  this._readableState.encoding = enc;
+  return this;
+};
 
-/**
- * Augment a Uint8Array *instance* (not the Uint8Array class!) with Buffer methods
- */
-Buffer._augment = function _augment (arr) {
-  arr.constructor = Buffer
-  arr._isBuffer = true
+// Don't raise the hwm > 8MB
+var MAX_HWM = 0x800000;
+function computeNewHighWaterMark(n) {
+  if (n >= MAX_HWM) {
+    n = MAX_HWM;
+  } else {
+    // Get the next highest power of 2 to prevent increasing hwm excessively in
+    // tiny amounts
+    n--;
+    n |= n >>> 1;
+    n |= n >>> 2;
+    n |= n >>> 4;
+    n |= n >>> 8;
+    n |= n >>> 16;
+    n++;
+  }
+  return n;
+}
 
-  // save reference to original Uint8Array set method before overwriting
-  arr._set = arr.set
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function howMuchToRead(n, state) {
+  if (n <= 0 || state.length === 0 && state.ended) return 0;
+  if (state.objectMode) return 1;
+  if (n !== n) {
+    // Only flow one buffer at a time
+    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
+  }
+  // If we're asking for more than the current hwm, then raise the hwm.
+  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
+  if (n <= state.length) return n;
+  // Don't have enough
+  if (!state.ended) {
+    state.needReadable = true;
+    return 0;
+  }
+  return state.length;
+}
 
-  // deprecated
-  arr.get = BP.get
-  arr.set = BP.set
+// you can override either this method, or the async _read(n) below.
+Readable.prototype.read = function (n) {
+  debug('read', n);
+  n = parseInt(n, 10);
+  var state = this._readableState;
+  var nOrig = n;
 
-  arr.write = BP.write
-  arr.toString = BP.toString
-  arr.toLocaleString = BP.toString
-  arr.toJSON = BP.toJSON
-  arr.equals = BP.equals
-  arr.compare = BP.compare
-  arr.indexOf = BP.indexOf
-  arr.copy = BP.copy
-  arr.slice = BP.slice
-  arr.readUIntLE = BP.readUIntLE
-  arr.readUIntBE = BP.readUIntBE
-  arr.readUInt8 = BP.readUInt8
-  arr.readUInt16LE = BP.readUInt16LE
-  arr.readUInt16BE = BP.readUInt16BE
-  arr.readUInt32LE = BP.readUInt32LE
-  arr.readUInt32BE = BP.readUInt32BE
-  arr.readIntLE = BP.readIntLE
-  arr.readIntBE = BP.readIntBE
-  arr.readInt8 = BP.readInt8
-  arr.readInt16LE = BP.readInt16LE
-  arr.readInt16BE = BP.readInt16BE
-  arr.readInt32LE = BP.readInt32LE
-  arr.readInt32BE = BP.readInt32BE
-  arr.readFloatLE = BP.readFloatLE
-  arr.readFloatBE = BP.readFloatBE
-  arr.readDoubleLE = BP.readDoubleLE
-  arr.readDoubleBE = BP.readDoubleBE
-  arr.writeUInt8 = BP.writeUInt8
-  arr.writeUIntLE = BP.writeUIntLE
-  arr.writeUIntBE = BP.writeUIntBE
-  arr.writeUInt16LE = BP.writeUInt16LE
-  arr.writeUInt16BE = BP.writeUInt16BE
-  arr.writeUInt32LE = BP.writeUInt32LE
-  arr.writeUInt32BE = BP.writeUInt32BE
-  arr.writeIntLE = BP.writeIntLE
-  arr.writeIntBE = BP.writeIntBE
-  arr.writeInt8 = BP.writeInt8
-  arr.writeInt16LE = BP.writeInt16LE
-  arr.writeInt16BE = BP.writeInt16BE
-  arr.writeInt32LE = BP.writeInt32LE
-  arr.writeInt32BE = BP.writeInt32BE
-  arr.writeFloatLE = BP.writeFloatLE
-  arr.writeFloatBE = BP.writeFloatBE
-  arr.writeDoubleLE = BP.writeDoubleLE
-  arr.writeDoubleBE = BP.writeDoubleBE
-  arr.fill = BP.fill
-  arr.inspect = BP.inspect
-  arr.toArrayBuffer = BP.toArrayBuffer
+  if (n !== 0) state.emittedReadable = false;
 
-  return arr
-}
+  // if we're doing read(0) to trigger a readable event, but we
+  // already have a bunch of data in the buffer, then just trigger
+  // the 'readable' event and move on.
+  if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) {
+    debug('read: emitReadable', state.length, state.ended);
+    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
+    return null;
+  }
 
-var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g
+  n = howMuchToRead(n, state);
 
-function base64clean (str) {
-  // Node strips out invalid characters like \n and \t from the string, base64-js does not
-  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
-  // Node converts strings with length < 2 to ''
-  if (str.length < 2) return ''
-  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
-  while (str.length % 4 !== 0) {
-    str = str + '='
+  // if we've ended, and we're now clear, then finish it up.
+  if (n === 0 && state.ended) {
+    if (state.length === 0) endReadable(this);
+    return null;
   }
-  return str
-}
 
-function stringtrim (str) {
-  if (str.trim) return str.trim()
-  return str.replace(/^\s+|\s+$/g, '')
-}
+  // All the actual chunk generation logic needs to be
+  // *below* the call to _read.  The reason is that in certain
+  // synthetic stream cases, such as passthrough streams, _read
+  // may be a completely synchronous operation which may change
+  // the state of the read buffer, providing enough data when
+  // before there was *not* enough.
+  //
+  // So, the steps are:
+  // 1. Figure out what the state of things will be after we do
+  // a read from the buffer.
+  //
+  // 2. If that resulting state will trigger a _read, then call _read.
+  // Note that this may be asynchronous, or synchronous.  Yes, it is
+  // deeply ugly to write APIs this way, but that still doesn't mean
+  // that the Readable class should behave improperly, as streams are
+  // designed to be sync/async agnostic.
+  // Take note if the _read call is sync or async (ie, if the read call
+  // has returned yet), so that we know whether or not it's safe to emit
+  // 'readable' etc.
+  //
+  // 3. Actually pull the requested chunks out of the buffer and return.
+
+  // if we need a readable event, then we need to do some reading.
+  var doRead = state.needReadable;
+  debug('need readable', doRead);
 
-function toHex (n) {
-  if (n < 16) return '0' + n.toString(16)
-  return n.toString(16)
-}
+  // if we currently have less than the highWaterMark, then also read some
+  if (state.length === 0 || state.length - n < state.highWaterMark) {
+    doRead = true;
+    debug('length less than watermark', doRead);
+  }
 
-function utf8ToBytes (string, units) {
-  units = units || Infinity
-  var codePoint
-  var length = string.length
-  var leadSurrogate = null
-  var bytes = []
+  // however, if we've ended, then there's no point, and if we're already
+  // reading, then it's unnecessary.
+  if (state.ended || state.reading) {
+    doRead = false;
+    debug('reading or ended', doRead);
+  } else if (doRead) {
+    debug('do read');
+    state.reading = true;
+    state.sync = true;
+    // if the length is currently zero, then we *need* a readable event.
+    if (state.length === 0) state.needReadable = true;
+    // call internal read method
+    this._read(state.highWaterMark);
+    state.sync = false;
+    // If _read pushed data synchronously, then `reading` will be false,
+    // and we need to re-evaluate how much data we can return to the user.
+    if (!state.reading) n = howMuchToRead(nOrig, state);
+  }
 
-  for (var i = 0; i < length; i++) {
-    codePoint = string.charCodeAt(i)
+  var ret;
+  if (n > 0) ret = fromList(n, state);else ret = null;
 
-    // is surrogate component
-    if (codePoint > 0xD7FF && codePoint < 0xE000) {
-      // last char was a lead
-      if (!leadSurrogate) {
-        // no lead yet
-        if (codePoint > 0xDBFF) {
-          // unexpected trail
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
+  if (ret === null) {
+    state.needReadable = true;
+    n = 0;
+  } else {
+    state.length -= n;
+  }
 
-        } else if (i + 1 === length) {
-          // unpaired lead
-          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-          continue
-        }
+  if (state.length === 0) {
+    // If we have nothing in the buffer, then we want to know
+    // as soon as we *do* get something into the buffer.
+    if (!state.ended) state.needReadable = true;
 
-        // valid lead
-        leadSurrogate = codePoint
+    // If we tried to read() past the EOF, then emit end on the next tick.
+    if (nOrig !== n && state.ended) endReadable(this);
+  }
 
-        continue
-      }
+  if (ret !== null) this.emit('data', ret);
 
-      // 2 leads in a row
-      if (codePoint < 0xDC00) {
-        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
-        leadSurrogate = codePoint
-        continue
-      }
+  return ret;
+};
 
-      // valid surrogate pair
-      codePoint = leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00 | 0x10000
+function chunkInvalid(state, chunk) {
+  var er = null;
+  if (!Buffer.isBuffer(chunk) && typeof chunk !== 'string' && chunk !== null && chunk !== undefined && !state.objectMode) {
+    er = new TypeError('Invalid non-string/buffer chunk');
+  }
+  return er;
+}
 
-    } else if (leadSurrogate) {
-      // valid bmp char, but last char was a lead
-      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+function onEofChunk(stream, state) {
+  if (state.ended) return;
+  if (state.decoder) {
+    var chunk = state.decoder.end();
+    if (chunk && chunk.length) {
+      state.buffer.push(chunk);
+      state.length += state.objectMode ? 1 : chunk.length;
     }
+  }
+  state.ended = true;
 
-    leadSurrogate = null
+  // emit 'readable' now to make sure it gets picked up.
+  emitReadable(stream);
+}
 
-    // encode utf8
-    if (codePoint < 0x80) {
-      if ((units -= 1) < 0) break
-      bytes.push(codePoint)
-    } else if (codePoint < 0x800) {
-      if ((units -= 2) < 0) break
-      bytes.push(
-        codePoint >> 0x6 | 0xC0,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x10000) {
-      if ((units -= 3) < 0) break
-      bytes.push(
-        codePoint >> 0xC | 0xE0,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else if (codePoint < 0x110000) {
-      if ((units -= 4) < 0) break
-      bytes.push(
-        codePoint >> 0x12 | 0xF0,
-        codePoint >> 0xC & 0x3F | 0x80,
-        codePoint >> 0x6 & 0x3F | 0x80,
-        codePoint & 0x3F | 0x80
-      )
-    } else {
-      throw new Error('Invalid code point')
-    }
+// Don't emit readable right away in sync mode, because this can trigger
+// another read() call => stack overflow.  This way, it might trigger
+// a nextTick recursion warning, but that's not so bad.
+function emitReadable(stream) {
+  var state = stream._readableState;
+  state.needReadable = false;
+  if (!state.emittedReadable) {
+    debug('emitReadable', state.flowing);
+    state.emittedReadable = true;
+    if (state.sync) processNextTick(emitReadable_, stream);else emitReadable_(stream);
   }
+}
 
-  return bytes
+function emitReadable_(stream) {
+  debug('emit readable');
+  stream.emit('readable');
+  flow(stream);
 }
 
-function asciiToBytes (str) {
-  var byteArray = []
-  for (var i = 0; i < str.length; i++) {
-    // Node's code seems to be doing this and not & 0x7F..
-    byteArray.push(str.charCodeAt(i) & 0xFF)
+// at this point, the user has presumably seen the 'readable' event,
+// and called read() to consume some data.  that may have triggered
+// in turn another _read(n) call, in which case reading = true if
+// it's in progress.
+// However, if we're not ended, or reading, and the length < hwm,
+// then go ahead and try to read some more preemptively.
+function maybeReadMore(stream, state) {
+  if (!state.readingMore) {
+    state.readingMore = true;
+    processNextTick(maybeReadMore_, stream, state);
   }
-  return byteArray
 }
 
-function utf16leToBytes (str, units) {
-  var c, hi, lo
-  var byteArray = []
-  for (var i = 0; i < str.length; i++) {
-    if ((units -= 2) < 0) break
+function maybeReadMore_(stream, state) {
+  var len = state.length;
+  while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) {
+    debug('maybeReadMore read 0');
+    stream.read(0);
+    if (len === state.length)
+      // didn't get any data, stop spinning.
+      break;else len = state.length;
+  }
+  state.readingMore = false;
+}
 
-    c = str.charCodeAt(i)
-    hi = c >> 8
-    lo = c % 256
-    byteArray.push(lo)
-    byteArray.push(hi)
+// abstract method.  to be overridden in specific implementation classes.
+// call cb(er, data) where data is <= n in length.
+// for virtual (non-string, non-buffer) streams, "length" is somewhat
+// arbitrary, and perhaps not very meaningful.
+Readable.prototype._read = function (n) {
+  this.emit('error', new Error('_read() is not implemented'));
+};
+
+Readable.prototype.pipe = function (dest, pipeOpts) {
+  var src = this;
+  var state = this._readableState;
+
+  switch (state.pipesCount) {
+    case 0:
+      state.pipes = dest;
+      break;
+    case 1:
+      state.pipes = [state.pipes, dest];
+      break;
+    default:
+      state.pipes.push(dest);
+      break;
   }
+  state.pipesCount += 1;
+  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
 
-  return byteArray
-}
+  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
 
-function base64ToBytes (str) {
-  return base64.toByteArray(base64clean(str))
-}
+  var endFn = doEnd ? onend : cleanup;
+  if (state.endEmitted) processNextTick(endFn);else src.once('end', endFn);
 
-function blitBuffer (src, dst, offset, length) {
-  for (var i = 0; i < length; i++) {
-    if ((i + offset >= dst.length) || (i >= src.length)) break
-    dst[i + offset] = src[i]
+  dest.on('unpipe', onunpipe);
+  function onunpipe(readable) {
+    debug('onunpipe');
+    if (readable === src) {
+      cleanup();
+    }
   }
-  return i
-}
 
-},{"base64-js":8,"ieee754":9,"is-array":10}],8:[function(require,module,exports){
-var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+  function onend() {
+    debug('onend');
+    dest.end();
+  }
 
-;(function (exports) {
-	'use strict';
+  // when the dest drains, it reduces the awaitDrain counter
+  // on the source.  This would be more elegant with a .once()
+  // handler in flow(), but adding and removing repeatedly is
+  // too slow.
+  var ondrain = pipeOnDrain(src);
+  dest.on('drain', ondrain);
 
-  var Arr = (typeof Uint8Array !== 'undefined')
-    ? Uint8Array
-    : Array
+  var cleanedUp = false;
+  function cleanup() {
+    debug('cleanup');
+    // cleanup event handlers once the pipe is broken
+    dest.removeListener('close', onclose);
+    dest.removeListener('finish', onfinish);
+    dest.removeListener('drain', ondrain);
+    dest.removeListener('error', onerror);
+    dest.removeListener('unpipe', onunpipe);
+    src.removeListener('end', onend);
+    src.removeListener('end', cleanup);
+    src.removeListener('data', ondata);
 
-	var PLUS   = '+'.charCodeAt(0)
-	var SLASH  = '/'.charCodeAt(0)
-	var NUMBER = '0'.charCodeAt(0)
-	var LOWER  = 'a'.charCodeAt(0)
-	var UPPER  = 'A'.charCodeAt(0)
-	var PLUS_URL_SAFE = '-'.charCodeAt(0)
-	var SLASH_URL_SAFE = '_'.charCodeAt(0)
+    cleanedUp = true;
+
+    // if the reader is waiting for a drain event from this
+    // specific writer, then it would cause it to never start
+    // flowing again.
+    // So, if this is awaiting a drain, then we just call it now.
+    // If we don't know, then assume that we are waiting for one.
+    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
+  }
 
-	function decode (elt) {
-		var code = elt.charCodeAt(0)
-		if (code === PLUS ||
-		    code === PLUS_URL_SAFE)
-			return 62 // '+'
-		if (code === SLASH ||
-		    code === SLASH_URL_SAFE)
-			return 63 // '/'
-		if (code < NUMBER)
-			return -1 //no match
-		if (code < NUMBER + 10)
-			return code - NUMBER + 26 + 26
-		if (code < UPPER + 26)
-			return code - UPPER
-		if (code < LOWER + 26)
-			return code - LOWER + 26
-	}
+  // If the user pushes more data while we're writing to dest then we'll end up
+  // in ondata again. However, we only want to increase awaitDrain once because
+  // dest will only emit one 'drain' event for the multiple writes.
+  // => Introduce a guard on increasing awaitDrain.
+  var increasedAwaitDrain = false;
+  src.on('data', ondata);
+  function ondata(chunk) {
+    debug('ondata');
+    increasedAwaitDrain = false;
+    var ret = dest.write(chunk);
+    if (false === ret && !increasedAwaitDrain) {
+      // If the user unpiped during `dest.write()`, it is possible
+      // to get stuck in a permanently paused state if that write
+      // also returned false.
+      // => Check whether `dest` is still a piping destination.
+      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
+        debug('false write response, pause', src._readableState.awaitDrain);
+        src._readableState.awaitDrain++;
+        increasedAwaitDrain = true;
+      }
+      src.pause();
+    }
+  }
 
-	function b64ToByteArray (b64) {
-		var i, j, l, tmp, placeHolders, arr
+  // if the dest has an error, then stop piping into it.
+  // however, don't suppress the throwing behavior for this.
+  function onerror(er) {
+    debug('onerror', er);
+    unpipe();
+    dest.removeListener('error', onerror);
+    if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);
+  }
 
-		if (b64.length % 4 > 0) {
-			throw new Error('Invalid string. Length must be a multiple of 4')
-		}
+  // Make sure our error handler is attached before userland ones.
+  prependListener(dest, 'error', onerror);
 
-		// the number of equal signs (place holders)
-		// if there are two placeholders, than the two characters before it
-		// represent one byte
-		// if there is only one, then the three characters before it represent 2 bytes
-		// this is just a cheap hack to not do indexOf twice
-		var len = b64.length
-		placeHolders = '=' === b64.charAt(len - 2) ? 2 : '=' === b64.charAt(len - 1) ? 1 : 0
+  // Both close and finish should trigger unpipe, but only once.
+  function onclose() {
+    dest.removeListener('finish', onfinish);
+    unpipe();
+  }
+  dest.once('close', onclose);
+  function onfinish() {
+    debug('onfinish');
+    dest.removeListener('close', onclose);
+    unpipe();
+  }
+  dest.once('finish', onfinish);
 
-		// base64 is 4/3 + up to two characters of the original data
-		arr = new Arr(b64.length * 3 / 4 - placeHolders)
+  function unpipe() {
+    debug('unpipe');
+    src.unpipe(dest);
+  }
 
-		// if there are placeholders, only get up to the last complete 4 chars
-		l = placeHolders > 0 ? b64.length - 4 : b64.length
+  // tell the dest that it's being piped to
+  dest.emit('pipe', src);
 
-		var L = 0
+  // start the flow if it hasn't been started already.
+  if (!state.flowing) {
+    debug('pipe resume');
+    src.resume();
+  }
 
-		function push (v) {
-			arr[L++] = v
-		}
+  return dest;
+};
 
-		for (i = 0, j = 0; i < l; i += 4, j += 3) {
-			tmp = (decode(b64.charAt(i)) << 18) | (decode(b64.charAt(i + 1)) << 12) | (decode(b64.charAt(i + 2)) << 6) | decode(b64.charAt(i + 3))
-			push((tmp & 0xFF0000) >> 16)
-			push((tmp & 0xFF00) >> 8)
-			push(tmp & 0xFF)
-		}
+function pipeOnDrain(src) {
+  return function () {
+    var state = src._readableState;
+    debug('pipeOnDrain', state.awaitDrain);
+    if (state.awaitDrain) state.awaitDrain--;
+    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
+      state.flowing = true;
+      flow(src);
+    }
+  };
+}
 
-		if (placeHolders === 2) {
-			tmp = (decode(b64.charAt(i)) << 2) | (decode(b64.charAt(i + 1)) >> 4)
-			push(tmp & 0xFF)
-		} else if (placeHolders === 1) {
-			tmp = (decode(b64.charAt(i)) << 10) | (decode(b64.charAt(i + 1)) << 4) | (decode(b64.charAt(i + 2)) >> 2)
-			push((tmp >> 8) & 0xFF)
-			push(tmp & 0xFF)
-		}
+Readable.prototype.unpipe = function (dest) {
+  var state = this._readableState;
 
-		return arr
-	}
+  // if we're not piping anywhere, then do nothing.
+  if (state.pipesCount === 0) return this;
 
-	function uint8ToBase64 (uint8) {
-		var i,
-			extraBytes = uint8.length % 3, // if we have 1 byte left, pad 2 bytes
-			output = "",
-			temp, length
+  // just one destination.  most common case.
+  if (state.pipesCount === 1) {
+    // passed in one, but it's not the right one.
+    if (dest && dest !== state.pipes) return this;
 
-		function encode (num) {
-			return lookup.charAt(num)
-		}
+    if (!dest) dest = state.pipes;
 
-		function tripletToBase64 (num) {
-			return encode(num >> 18 & 0x3F) + encode(num >> 12 & 0x3F) + encode(num >> 6 & 0x3F) + encode(num & 0x3F)
-		}
+    // got a match.
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    if (dest) dest.emit('unpipe', this);
+    return this;
+  }
 
-		// go through the array every three bytes, we'll deal with trailing stuff later
-		for (i = 0, length = uint8.length - extraBytes; i < length; i += 3) {
-			temp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
-			output += tripletToBase64(temp)
-		}
+  // slow case. multiple pipe destinations.
 
-		// pad the end with zeros, but make sure to not forget the extra bytes
-		switch (extraBytes) {
-			case 1:
-				temp = uint8[uint8.length - 1]
-				output += encode(temp >> 2)
-				output += encode((temp << 4) & 0x3F)
-				output += '=='
-				break
-			case 2:
-				temp = (uint8[uint8.length - 2] << 8) + (uint8[uint8.length - 1])
-				output += encode(temp >> 10)
-				output += encode((temp >> 4) & 0x3F)
-				output += encode((temp << 2) & 0x3F)
-				output += '='
-				break
-		}
+  if (!dest) {
+    // remove all.
+    var dests = state.pipes;
+    var len = state.pipesCount;
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
 
-		return output
-	}
+    for (var i = 0; i < len; i++) {
+      dests[i].emit('unpipe', this);
+    }return this;
+  }
 
-	exports.toByteArray = b64ToByteArray
-	exports.fromByteArray = uint8ToBase64
-}(typeof exports === 'undefined' ? (this.base64js = {}) : exports))
+  // try to find the right one.
+  var index = indexOf(state.pipes, dest);
+  if (index === -1) return this;
 
-},{}],9:[function(require,module,exports){
-exports.read = function (buffer, offset, isLE, mLen, nBytes) {
-  var e, m
-  var eLen = nBytes * 8 - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var nBits = -7
-  var i = isLE ? (nBytes - 1) : 0
-  var d = isLE ? -1 : 1
-  var s = buffer[offset + i]
+  state.pipes.splice(index, 1);
+  state.pipesCount -= 1;
+  if (state.pipesCount === 1) state.pipes = state.pipes[0];
 
-  i += d
+  dest.emit('unpipe', this);
 
-  e = s & ((1 << (-nBits)) - 1)
-  s >>= (-nBits)
-  nBits += eLen
-  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+  return this;
+};
 
-  m = e & ((1 << (-nBits)) - 1)
-  e >>= (-nBits)
-  nBits += mLen
-  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+// set up data events if they are asked for
+// Ensure readable listeners eventually get something
+Readable.prototype.on = function (ev, fn) {
+  var res = Stream.prototype.on.call(this, ev, fn);
 
-  if (e === 0) {
-    e = 1 - eBias
-  } else if (e === eMax) {
-    return m ? NaN : ((s ? -1 : 1) * Infinity)
-  } else {
-    m = m + Math.pow(2, mLen)
-    e = e - eBias
+  if (ev === 'data') {
+    // Start flowing on next tick if stream isn't explicitly paused
+    if (this._readableState.flowing !== false) this.resume();
+  } else if (ev === 'readable') {
+    var state = this._readableState;
+    if (!state.endEmitted && !state.readableListening) {
+      state.readableListening = state.needReadable = true;
+      state.emittedReadable = false;
+      if (!state.reading) {
+        processNextTick(nReadingNextTick, this);
+      } else if (state.length) {
+        emitReadable(this, state);
+      }
+    }
   }
-  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-}
 
-exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
-  var e, m, c
-  var eLen = nBytes * 8 - mLen - 1
-  var eMax = (1 << eLen) - 1
-  var eBias = eMax >> 1
-  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
-  var i = isLE ? 0 : (nBytes - 1)
-  var d = isLE ? 1 : -1
-  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
+  return res;
+};
+Readable.prototype.addListener = Readable.prototype.on;
 
-  value = Math.abs(value)
+function nReadingNextTick(self) {
+  debug('readable nexttick read 0');
+  self.read(0);
+}
 
-  if (isNaN(value) || value === Infinity) {
-    m = isNaN(value) ? 1 : 0
-    e = eMax
-  } else {
-    e = Math.floor(Math.log(value) / Math.LN2)
-    if (value * (c = Math.pow(2, -e)) < 1) {
-      e--
-      c *= 2
-    }
-    if (e + eBias >= 1) {
-      value += rt / c
-    } else {
-      value += rt * Math.pow(2, 1 - eBias)
-    }
-    if (value * c >= 2) {
-      e++
-      c /= 2
-    }
+// pause() and resume() are remnants of the legacy readable stream API
+// If the user uses them, then switch into old mode.
+Readable.prototype.resume = function () {
+  var state = this._readableState;
+  if (!state.flowing) {
+    debug('resume');
+    state.flowing = true;
+    resume(this, state);
+  }
+  return this;
+};
 
-    if (e + eBias >= eMax) {
-      m = 0
-      e = eMax
-    } else if (e + eBias >= 1) {
-      m = (value * c - 1) * Math.pow(2, mLen)
-      e = e + eBias
-    } else {
-      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
-      e = 0
-    }
+function resume(stream, state) {
+  if (!state.resumeScheduled) {
+    state.resumeScheduled = true;
+    processNextTick(resume_, stream, state);
   }
+}
 
-  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+function resume_(stream, state) {
+  if (!state.reading) {
+    debug('resume read 0');
+    stream.read(0);
+  }
 
-  e = (e << mLen) | m
-  eLen += mLen
-  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+  state.resumeScheduled = false;
+  state.awaitDrain = 0;
+  stream.emit('resume');
+  flow(stream);
+  if (state.flowing && !state.reading) stream.read(0);
+}
 
-  buffer[offset + i - d] |= s * 128
+Readable.prototype.pause = function () {
+  debug('call pause flowing=%j', this._readableState.flowing);
+  if (false !== this._readableState.flowing) {
+    debug('pause');
+    this._readableState.flowing = false;
+    this.emit('pause');
+  }
+  return this;
+};
+
+function flow(stream) {
+  var state = stream._readableState;
+  debug('flow', state.flowing);
+  while (state.flowing && stream.read() !== null) {}
 }
 
-},{}],10:[function(require,module,exports){
+// wrap an old-style stream as the async data source.
+// This is *not* part of the readable stream interface.
+// It is an ugly unfortunate mess of history.
+Readable.prototype.wrap = function (stream) {
+  var state = this._readableState;
+  var paused = false;
 
-/**
- * isArray
- */
+  var self = this;
+  stream.on('end', function () {
+    debug('wrapped end');
+    if (state.decoder && !state.ended) {
+      var chunk = state.decoder.end();
+      if (chunk && chunk.length) self.push(chunk);
+    }
 
-var isArray = Array.isArray;
+    self.push(null);
+  });
 
-/**
- * toString
- */
+  stream.on('data', function (chunk) {
+    debug('wrapped data');
+    if (state.decoder) chunk = state.decoder.write(chunk);
 
-var str = Object.prototype.toString;
+    // don't skip over falsy values in objectMode
+    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
 
-/**
- * Whether or not the given `val`
- * is an array.
- *
- * example:
- *
- *        isArray([]);
- *        // > true
- *        isArray(arguments);
- *        // > false
- *        isArray('');
- *        // > false
- *
- * @param {mixed} val
- * @return {bool}
- */
+    var ret = self.push(chunk);
+    if (!ret) {
+      paused = true;
+      stream.pause();
+    }
+  });
 
-module.exports = isArray || function (val) {
-  return !! val && '[object Array]' == str.call(val);
-};
+  // proxy all the other methods.
+  // important when wrapping filters and duplexes.
+  for (var i in stream) {
+    if (this[i] === undefined && typeof stream[i] === 'function') {
+      this[i] = function (method) {
+        return function () {
+          return stream[method].apply(stream, arguments);
+        };
+      }(i);
+    }
+  }
 
-},{}],11:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+  // proxy certain important events.
+  var events = ['error', 'close', 'destroy', 'pause', 'resume'];
+  forEach(events, function (ev) {
+    stream.on(ev, self.emit.bind(self, ev));
+  });
 
-function EventEmitter() {
-  this._events = this._events || {};
-  this._maxListeners = this._maxListeners || undefined;
-}
-module.exports = EventEmitter;
+  // when we try to consume some more bytes, simply unpause the
+  // underlying stream.
+  self._read = function (n) {
+    debug('wrapped _read', n);
+    if (paused) {
+      paused = false;
+      stream.resume();
+    }
+  };
 
-// Backwards-compat with node 0.10.x
-EventEmitter.EventEmitter = EventEmitter;
+  return self;
+};
 
-EventEmitter.prototype._events = undefined;
-EventEmitter.prototype._maxListeners = undefined;
+// exposed for testing purposes only.
+Readable._fromList = fromList;
 
-// By default EventEmitters will print a warning if more than 10 listeners are
-// added to it. This is a useful default which helps finding memory leaks.
-EventEmitter.defaultMaxListeners = 10;
+// Pluck off n bytes from an array of buffers.
+// Length is the combined lengths of all the buffers in the list.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromList(n, state) {
+  // nothing buffered
+  if (state.length === 0) return null;
 
-// Obviously not all Emitters should be limited to 10. This function allows
-// that to be increased. Set to zero for unlimited.
-EventEmitter.prototype.setMaxListeners = function(n) {
-  if (!isNumber(n) || n < 0 || isNaN(n))
-    throw TypeError('n must be a positive number');
-  this._maxListeners = n;
-  return this;
-};
+  var ret;
+  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
+    // read it all, truncate the list
+    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);
+    state.buffer.clear();
+  } else {
+    // read part of list
+    ret = fromListPartial(n, state.buffer, state.decoder);
+  }
 
-EventEmitter.prototype.emit = function(type) {
-  var er, handler, len, args, i, listeners;
+  return ret;
+}
 
-  if (!this._events)
-    this._events = {};
+// Extracts only enough buffered data to satisfy the amount requested.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromListPartial(n, list, hasStrings) {
+  var ret;
+  if (n < list.head.data.length) {
+    // slice is the same for buffers and strings
+    ret = list.head.data.slice(0, n);
+    list.head.data = list.head.data.slice(n);
+  } else if (n === list.head.data.length) {
+    // first chunk is a perfect match
+    ret = list.shift();
+  } else {
+    // result spans more than one buffer
+    ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);
+  }
+  return ret;
+}
 
-  // If there is no 'error' event listener then throw.
-  if (type === 'error') {
-    if (!this._events.error ||
-        (isObject(this._events.error) && !this._events.error.length)) {
-      er = arguments[1];
-      if (er instanceof Error) {
-        throw er; // Unhandled 'error' event
+// Copies a specified amount of characters from the list of buffered data
+// chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBufferString(n, list) {
+  var p = list.head;
+  var c = 1;
+  var ret = p.data;
+  n -= ret.length;
+  while (p = p.next) {
+    var str = p.data;
+    var nb = n > str.length ? str.length : n;
+    if (nb === str.length) ret += str;else ret += str.slice(0, n);
+    n -= nb;
+    if (n === 0) {
+      if (nb === str.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = str.slice(nb);
       }
-      throw TypeError('Uncaught, unspecified "error" event.');
+      break;
     }
+    ++c;
   }
+  list.length -= c;
+  return ret;
+}
 
-  handler = this._events[type];
+// Copies a specified amount of bytes from the list of buffered data chunks.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function copyFromBuffer(n, list) {
+  var ret = bufferShim.allocUnsafe(n);
+  var p = list.head;
+  var c = 1;
+  p.data.copy(ret);
+  n -= p.data.length;
+  while (p = p.next) {
+    var buf = p.data;
+    var nb = n > buf.length ? buf.length : n;
+    buf.copy(ret, ret.length - n, 0, nb);
+    n -= nb;
+    if (n === 0) {
+      if (nb === buf.length) {
+        ++c;
+        if (p.next) list.head = p.next;else list.head = list.tail = null;
+      } else {
+        list.head = p;
+        p.data = buf.slice(nb);
+      }
+      break;
+    }
+    ++c;
+  }
+  list.length -= c;
+  return ret;
+}
 
-  if (isUndefined(handler))
-    return false;
+function endReadable(stream) {
+  var state = stream._readableState;
 
-  if (isFunction(handler)) {
-    switch (arguments.length) {
-      // fast cases
-      case 1:
-        handler.call(this);
-        break;
-      case 2:
-        handler.call(this, arguments[1]);
-        break;
-      case 3:
-        handler.call(this, arguments[1], arguments[2]);
-        break;
-      // slower
-      default:
-        len = arguments.length;
-        args = new Array(len - 1);
-        for (i = 1; i < len; i++)
-          args[i - 1] = arguments[i];
-        handler.apply(this, args);
-    }
-  } else if (isObject(handler)) {
-    len = arguments.length;
-    args = new Array(len - 1);
-    for (i = 1; i < len; i++)
-      args[i - 1] = arguments[i];
+  // If we get here before consuming all the bytes, then that is a
+  // bug in node.  Should never happen.
+  if (state.length > 0) throw new Error('"endReadable()" called on non-empty stream');
 
-    listeners = handler.slice();
-    len = listeners.length;
-    for (i = 0; i < len; i++)
-      listeners[i].apply(this, args);
+  if (!state.endEmitted) {
+    state.ended = true;
+    processNextTick(endReadableNT, state, stream);
+  }
+}
+
+function endReadableNT(state, stream) {
+  // Check that we didn't get one last unshift.
+  if (!state.endEmitted && state.length === 0) {
+    state.endEmitted = true;
+    stream.readable = false;
+    stream.emit('end');
+  }
+}
+
+function forEach(xs, f) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    f(xs[i], i);
+  }
+}
+
+function indexOf(xs, x) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    if (xs[i] === x) return i;
   }
+  return -1;
+}
+}).call(this,require('_process'))
+},{"./_stream_duplex":15,"./internal/streams/BufferList":20,"_process":13,"buffer":5,"buffer-shims":4,"core-util-is":6,"events":7,"inherits":9,"isarray":11,"process-nextick-args":12,"string_decoder/":26,"util":3}],18:[function(require,module,exports){
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
 
-  return true;
-};
+'use strict';
 
-EventEmitter.prototype.addListener = function(type, listener) {
-  var m;
+module.exports = Transform;
 
-  if (!isFunction(listener))
-    throw TypeError('listener must be a function');
+var Duplex = require('./_stream_duplex');
 
-  if (!this._events)
-    this._events = {};
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
 
-  // To avoid recursion in the case that type === "newListener"! Before
-  // adding it to the listeners, first emit "newListener".
-  if (this._events.newListener)
-    this.emit('newListener', type,
-              isFunction(listener.listener) ?
-              listener.listener : listener);
+util.inherits(Transform, Duplex);
 
-  if (!this._events[type])
-    // Optimize the case of one listener. Don't need the extra array object.
-    this._events[type] = listener;
-  else if (isObject(this._events[type]))
-    // If we've already got an array, just append.
-    this._events[type].push(listener);
-  else
-    // Adding the second element, need to change to array.
-    this._events[type] = [this._events[type], listener];
+function TransformState(stream) {
+  this.afterTransform = function (er, data) {
+    return afterTransform(stream, er, data);
+  };
 
-  // Check for listener leak
-  if (isObject(this._events[type]) && !this._events[type].warned) {
-    var m;
-    if (!isUndefined(this._maxListeners)) {
-      m = this._maxListeners;
-    } else {
-      m = EventEmitter.defaultMaxListeners;
-    }
+  this.needTransform = false;
+  this.transforming = false;
+  this.writecb = null;
+  this.writechunk = null;
+  this.writeencoding = null;
+}
 
-    if (m && m > 0 && this._events[type].length > m) {
-      this._events[type].warned = true;
-      console.error('(node) warning: possible EventEmitter memory ' +
-                    'leak detected. %d listeners added. ' +
-                    'Use emitter.setMaxListeners() to increase limit.',
-                    this._events[type].length);
-      if (typeof console.trace === 'function') {
-        // not supported in IE 10
-        console.trace();
-      }
-    }
-  }
+function afterTransform(stream, er, data) {
+  var ts = stream._transformState;
+  ts.transforming = false;
 
-  return this;
-};
+  var cb = ts.writecb;
 
-EventEmitter.prototype.on = EventEmitter.prototype.addListener;
+  if (!cb) return stream.emit('error', new Error('no writecb in Transform class'));
 
-EventEmitter.prototype.once = function(type, listener) {
-  if (!isFunction(listener))
-    throw TypeError('listener must be a function');
+  ts.writechunk = null;
+  ts.writecb = null;
 
-  var fired = false;
+  if (data !== null && data !== undefined) stream.push(data);
 
-  function g() {
-    this.removeListener(type, g);
+  cb(er);
 
-    if (!fired) {
-      fired = true;
-      listener.apply(this, arguments);
-    }
+  var rs = stream._readableState;
+  rs.reading = false;
+  if (rs.needReadable || rs.length < rs.highWaterMark) {
+    stream._read(rs.highWaterMark);
   }
+}
 
-  g.listener = listener;
-  this.on(type, g);
+function Transform(options) {
+  if (!(this instanceof Transform)) return new Transform(options);
 
-  return this;
-};
+  Duplex.call(this, options);
 
-// emits a 'removeListener' event iff the listener was removed
-EventEmitter.prototype.removeListener = function(type, listener) {
-  var list, position, length, i;
+  this._transformState = new TransformState(this);
 
-  if (!isFunction(listener))
-    throw TypeError('listener must be a function');
+  var stream = this;
 
-  if (!this._events || !this._events[type])
-    return this;
+  // start out asking for a readable event once data is transformed.
+  this._readableState.needReadable = true;
 
-  list = this._events[type];
-  length = list.length;
-  position = -1;
+  // we have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false;
 
-  if (list === listener ||
-      (isFunction(list.listener) && list.listener === listener)) {
-    delete this._events[type];
-    if (this._events.removeListener)
-      this.emit('removeListener', type, listener);
+  if (options) {
+    if (typeof options.transform === 'function') this._transform = options.transform;
 
-  } else if (isObject(list)) {
-    for (i = length; i-- > 0;) {
-      if (list[i] === listener ||
-          (list[i].listener && list[i].listener === listener)) {
-        position = i;
-        break;
-      }
-    }
+    if (typeof options.flush === 'function') this._flush = options.flush;
+  }
 
-    if (position < 0)
-      return this;
+  // When the writable side finishes, then flush out anything remaining.
+  this.once('prefinish', function () {
+    if (typeof this._flush === 'function') this._flush(function (er, data) {
+      done(stream, er, data);
+    });else done(stream);
+  });
+}
 
-    if (list.length === 1) {
-      list.length = 0;
-      delete this._events[type];
-    } else {
-      list.splice(position, 1);
-    }
+Transform.prototype.push = function (chunk, encoding) {
+  this._transformState.needTransform = false;
+  return Duplex.prototype.push.call(this, chunk, encoding);
+};
 
-    if (this._events.removeListener)
-      this.emit('removeListener', type, listener);
+// This is the part where you do stuff!
+// override this function in implementation classes.
+// 'chunk' is an input chunk.
+//
+// Call `push(newChunk)` to pass along transformed output
+// to the readable side.  You may call 'push' zero or more times.
+//
+// Call `cb(err)` when you are done with this chunk.  If you pass
+// an error, then that'll put the hurt on the whole operation.  If you
+// never call cb(), then you'll never get another chunk.
+Transform.prototype._transform = function (chunk, encoding, cb) {
+  throw new Error('_transform() is not implemented');
+};
+
+Transform.prototype._write = function (chunk, encoding, cb) {
+  var ts = this._transformState;
+  ts.writecb = cb;
+  ts.writechunk = chunk;
+  ts.writeencoding = encoding;
+  if (!ts.transforming) {
+    var rs = this._readableState;
+    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
   }
+};
 
-  return this;
+// Doesn't matter what the args are here.
+// _transform does all the work.
+// That we got here means that the readable side wants more data.
+Transform.prototype._read = function (n) {
+  var ts = this._transformState;
+
+  if (ts.writechunk !== null && ts.writecb && !ts.transforming) {
+    ts.transforming = true;
+    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
+  } else {
+    // mark that we need a transform, so that any data that comes in
+    // will get processed, now that we've asked for it.
+    ts.needTransform = true;
+  }
 };
 
-EventEmitter.prototype.removeAllListeners = function(type) {
-  var key, listeners;
+function done(stream, er, data) {
+  if (er) return stream.emit('error', er);
 
-  if (!this._events)
-    return this;
+  if (data !== null && data !== undefined) stream.push(data);
 
-  // not listening for removeListener, no need to emit
-  if (!this._events.removeListener) {
-    if (arguments.length === 0)
-      this._events = {};
-    else if (this._events[type])
-      delete this._events[type];
-    return this;
-  }
+  // if there's nothing in the write buffer, then that means
+  // that nothing more will ever be provided
+  var ws = stream._writableState;
+  var ts = stream._transformState;
 
-  // emit removeListener for all listeners on all events
-  if (arguments.length === 0) {
-    for (key in this._events) {
-      if (key === 'removeListener') continue;
-      this.removeAllListeners(key);
-    }
-    this.removeAllListeners('removeListener');
-    this._events = {};
-    return this;
-  }
+  if (ws.length) throw new Error('Calling transform done when ws.length != 0');
 
-  listeners = this._events[type];
+  if (ts.transforming) throw new Error('Calling transform done when still transforming');
 
-  if (isFunction(listeners)) {
-    this.removeListener(type, listeners);
-  } else {
-    // LIFO order
-    while (listeners.length)
-      this.removeListener(type, listeners[listeners.length - 1]);
-  }
-  delete this._events[type];
+  return stream.push(null);
+}
+},{"./_stream_duplex":15,"core-util-is":6,"inherits":9}],19:[function(require,module,exports){
+(function (process){
+// A bit simpler than readable streams.
+// Implement an async ._write(chunk, encoding, cb), and it'll handle all
+// the drain event emission and buffering.
 
-  return this;
-};
+'use strict';
 
-EventEmitter.prototype.listeners = function(type) {
-  var ret;
-  if (!this._events || !this._events[type])
-    ret = [];
-  else if (isFunction(this._events[type]))
-    ret = [this._events[type]];
-  else
-    ret = this._events[type].slice();
-  return ret;
-};
+module.exports = Writable;
 
-EventEmitter.listenerCount = function(emitter, type) {
-  var ret;
-  if (!emitter._events || !emitter._events[type])
-    ret = 0;
-  else if (isFunction(emitter._events[type]))
-    ret = 1;
-  else
-    ret = emitter._events[type].length;
-  return ret;
+/*<replacement>*/
+var processNextTick = require('process-nextick-args');
+/*</replacement>*/
+
+/*<replacement>*/
+var asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : processNextTick;
+/*</replacement>*/
+
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
+
+Writable.WritableState = WritableState;
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+/*<replacement>*/
+var internalUtil = {
+  deprecate: require('util-deprecate')
 };
+/*</replacement>*/
 
-function isFunction(arg) {
-  return typeof arg === 'function';
-}
+/*<replacement>*/
+var Stream;
+(function () {
+  try {
+    Stream = require('st' + 'ream');
+  } catch (_) {} finally {
+    if (!Stream) Stream = require('events').EventEmitter;
+  }
+})();
+/*</replacement>*/
 
-function isNumber(arg) {
-  return typeof arg === 'number';
-}
+var Buffer = require('buffer').Buffer;
+/*<replacement>*/
+var bufferShim = require('buffer-shims');
+/*</replacement>*/
 
-function isObject(arg) {
-  return typeof arg === 'object' && arg !== null;
-}
+util.inherits(Writable, Stream);
 
-function isUndefined(arg) {
-  return arg === void 0;
-}
+function nop() {}
 
-},{}],12:[function(require,module,exports){
-if (typeof Object.create === 'function') {
-  // implementation from standard node.js 'util' module
-  module.exports = function inherits(ctor, superCtor) {
-    ctor.super_ = superCtor
-    ctor.prototype = Object.create(superCtor.prototype, {
-      constructor: {
-        value: ctor,
-        enumerable: false,
-        writable: true,
-        configurable: true
-      }
-    });
-  };
-} else {
-  // old school shim for old browsers
-  module.exports = function inherits(ctor, superCtor) {
-    ctor.super_ = superCtor
-    var TempCtor = function () {}
-    TempCtor.prototype = superCtor.prototype
-    ctor.prototype = new TempCtor()
-    ctor.prototype.constructor = ctor
-  }
+function WriteReq(chunk, encoding, cb) {
+  this.chunk = chunk;
+  this.encoding = encoding;
+  this.callback = cb;
+  this.next = null;
 }
 
-},{}],13:[function(require,module,exports){
-module.exports = Array.isArray || function (arr) {
-  return Object.prototype.toString.call(arr) == '[object Array]';
-};
+function WritableState(options, stream) {
+  Duplex = Duplex || require('./_stream_duplex');
 
-},{}],14:[function(require,module,exports){
-// shim for using process in browser
+  options = options || {};
 
-var process = module.exports = {};
-var queue = [];
-var draining = false;
-var currentQueue;
-var queueIndex = -1;
+  // object stream flag to indicate whether or not this stream
+  // contains buffers or objects.
+  this.objectMode = !!options.objectMode;
 
-function cleanUpNextTick() {
-    draining = false;
-    if (currentQueue.length) {
-        queue = currentQueue.concat(queue);
-    } else {
-        queueIndex = -1;
-    }
-    if (queue.length) {
-        drainQueue();
-    }
-}
+  if (stream instanceof Duplex) this.objectMode = this.objectMode || !!options.writableObjectMode;
 
-function drainQueue() {
-    if (draining) {
-        return;
-    }
-    var timeout = setTimeout(cleanUpNextTick);
-    draining = true;
+  // the point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write()
+  var hwm = options.highWaterMark;
+  var defaultHwm = this.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = hwm || hwm === 0 ? hwm : defaultHwm;
 
-    var len = queue.length;
-    while(len) {
-        currentQueue = queue;
-        queue = [];
-        while (++queueIndex < len) {
-            currentQueue[queueIndex].run();
-        }
-        queueIndex = -1;
-        len = queue.length;
-    }
-    currentQueue = null;
-    draining = false;
-    clearTimeout(timeout);
-}
+  // cast to ints.
+  this.highWaterMark = ~ ~this.highWaterMark;
 
-process.nextTick = function (fun) {
-    var args = new Array(arguments.length - 1);
-    if (arguments.length > 1) {
-        for (var i = 1; i < arguments.length; i++) {
-            args[i - 1] = arguments[i];
-        }
-    }
-    queue.push(new Item(fun, args));
-    if (queue.length === 1 && !draining) {
-        setTimeout(drainQueue, 0);
-    }
-};
+  // drain event flag.
+  this.needDrain = false;
+  // at the start of calling end()
+  this.ending = false;
+  // when end() has been called, and returned
+  this.ended = false;
+  // when 'finish' is emitted
+  this.finished = false;
 
-// v8 likes predictible objects
-function Item(fun, array) {
-    this.fun = fun;
-    this.array = array;
-}
-Item.prototype.run = function () {
-    this.fun.apply(null, this.array);
-};
-process.title = 'browser';
-process.browser = true;
-process.env = {};
-process.argv = [];
-process.version = ''; // empty string to avoid regexp issues
-process.versions = {};
+  // should we decode strings into buffers before passing to _write?
+  // this is here so that some node-core streams can optimize string
+  // handling at a lower level.
+  var noDecode = options.decodeStrings === false;
+  this.decodeStrings = !noDecode;
 
-function noop() {}
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
 
-process.on = noop;
-process.addListener = noop;
-process.once = noop;
-process.off = noop;
-process.removeListener = noop;
-process.removeAllListeners = noop;
-process.emit = noop;
+  // not an actual buffer we keep track of, but a measurement
+  // of how much we're waiting to get pushed to some underlying
+  // socket or file.
+  this.length = 0;
 
-process.binding = function (name) {
-    throw new Error('process.binding is not supported');
-};
+  // a flag to see when we're in the middle of a write.
+  this.writing = false;
 
-// TODO(shtylman)
-process.cwd = function () { return '/' };
-process.chdir = function (dir) {
-    throw new Error('process.chdir is not supported');
-};
-process.umask = function() { return 0; };
+  // when true all writes will be buffered until .uncork() call
+  this.corked = 0;
 
-},{}],15:[function(require,module,exports){
-module.exports = require("./lib/_stream_duplex.js")
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
 
-},{"./lib/_stream_duplex.js":16}],16:[function(require,module,exports){
-(function (process){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+  // a flag to know if we're processing previously buffered items, which
+  // may call the _write() callback in the same tick, so that we don't
+  // end up in an overlapped onwrite situation.
+  this.bufferProcessing = false;
 
-// a duplex stream is just a stream that is both readable and writable.
-// Since JS doesn't have multiple prototypal inheritance, this class
-// prototypally inherits from Readable, and then parasitically from
-// Writable.
+  // the callback that's passed to _write(chunk,cb)
+  this.onwrite = function (er) {
+    onwrite(stream, er);
+  };
 
-module.exports = Duplex;
+  // the callback that the user supplies to write(chunk,encoding,cb)
+  this.writecb = null;
 
-/*<replacement>*/
-var objectKeys = Object.keys || function (obj) {
-  var keys = [];
-  for (var key in obj) keys.push(key);
-  return keys;
+  // the amount that is being written when _write is called.
+  this.writelen = 0;
+
+  this.bufferedRequest = null;
+  this.lastBufferedRequest = null;
+
+  // number of pending user-supplied write callbacks
+  // this must be 0 before 'finish' can be emitted
+  this.pendingcb = 0;
+
+  // emit prefinish if the only thing we're waiting for is _write cbs
+  // This is relevant for synchronous Transform streams
+  this.prefinished = false;
+
+  // True if the error was already emitted and should not be thrown again
+  this.errorEmitted = false;
+
+  // count buffered requests
+  this.bufferedRequestCount = 0;
+
+  // allocate the first CorkedRequest, there is always
+  // one allocated and free to use, and we maintain at most two
+  this.corkedRequestsFree = new CorkedRequest(this);
 }
-/*</replacement>*/
 
+WritableState.prototype.getBuffer = function getBuffer() {
+  var current = this.bufferedRequest;
+  var out = [];
+  while (current) {
+    out.push(current);
+    current = current.next;
+  }
+  return out;
+};
+
+(function () {
+  try {
+    Object.defineProperty(WritableState.prototype, 'buffer', {
+      get: internalUtil.deprecate(function () {
+        return this.getBuffer();
+      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.')
+    });
+  } catch (_) {}
+})();
 
-/*<replacement>*/
-var util = require('core-util-is');
-util.inherits = require('inherits');
-/*</replacement>*/
+// Test _writableState for inheritance to account for Duplex streams,
+// whose prototype chain only points to Readable.
+var realHasInstance;
+if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
+  realHasInstance = Function.prototype[Symbol.hasInstance];
+  Object.defineProperty(Writable, Symbol.hasInstance, {
+    value: function (object) {
+      if (realHasInstance.call(this, object)) return true;
 
-var Readable = require('./_stream_readable');
-var Writable = require('./_stream_writable');
+      return object && object._writableState instanceof WritableState;
+    }
+  });
+} else {
+  realHasInstance = function (object) {
+    return object instanceof this;
+  };
+}
 
-util.inherits(Duplex, Readable);
+function Writable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
 
-forEach(objectKeys(Writable.prototype), function(method) {
-  if (!Duplex.prototype[method])
-    Duplex.prototype[method] = Writable.prototype[method];
-});
+  // Writable ctor is applied to Duplexes, too.
+  // `realHasInstance` is necessary because using plain `instanceof`
+  // would return false, as no `_writableState` property is attached.
 
-function Duplex(options) {
-  if (!(this instanceof Duplex))
-    return new Duplex(options);
+  // Trying to use the custom `instanceof` for Writable here will also break the
+  // Node.js LazyTransform implementation, which has a non-trivial getter for
+  // `_writableState` that would lead to infinite recursion.
+  if (!realHasInstance.call(Writable, this) && !(this instanceof Duplex)) {
+    return new Writable(options);
+  }
 
-  Readable.call(this, options);
-  Writable.call(this, options);
+  this._writableState = new WritableState(options, this);
 
-  if (options && options.readable === false)
-    this.readable = false;
+  // legacy.
+  this.writable = true;
 
-  if (options && options.writable === false)
-    this.writable = false;
+  if (options) {
+    if (typeof options.write === 'function') this._write = options.write;
 
-  this.allowHalfOpen = true;
-  if (options && options.allowHalfOpen === false)
-    this.allowHalfOpen = false;
+    if (typeof options.writev === 'function') this._writev = options.writev;
+  }
 
-  this.once('end', onend);
+  Stream.call(this);
 }
 
-// the no-half-open enforcer
-function onend() {
-  // if we allow half-open state, or if the writable side ended,
-  // then we're ok.
-  if (this.allowHalfOpen || this._writableState.ended)
-    return;
+// Otherwise people can pipe Writable streams, which is just wrong.
+Writable.prototype.pipe = function () {
+  this.emit('error', new Error('Cannot pipe, not readable'));
+};
 
-  // no more data can be written.
-  // But allow more writes to happen in this tick.
-  process.nextTick(this.end.bind(this));
+function writeAfterEnd(stream, cb) {
+  var er = new Error('write after end');
+  // TODO: defer error events consistently everywhere, not just the cb
+  stream.emit('error', er);
+  processNextTick(cb, er);
 }
 
-function forEach (xs, f) {
-  for (var i = 0, l = xs.length; i < l; i++) {
-    f(xs[i], i);
+// If we get something that is not a buffer, string, null, or undefined,
+// and we're not in objectMode, then that's an error.
+// Otherwise stream chunks are all considered to be of length=1, and the
+// watermarks determine how many objects to keep in the buffer, rather than
+// how many bytes or characters.
+function validChunk(stream, state, chunk, cb) {
+  var valid = true;
+  var er = false;
+  // Always throw error if a null is written
+  // if we are not in object mode then throw
+  // if it is not a buffer, string, or undefined.
+  if (chunk === null) {
+    er = new TypeError('May not write null values to stream');
+  } else if (!Buffer.isBuffer(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
+    er = new TypeError('Invalid non-string/buffer chunk');
+  }
+  if (er) {
+    stream.emit('error', er);
+    processNextTick(cb, er);
+    valid = false;
   }
+  return valid;
 }
 
-}).call(this,require('_process'))
-},{"./_stream_readable":18,"./_stream_writable":20,"_process":14,"core-util-is":21,"inherits":12}],17:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-// a passthrough stream.
-// basically just the most minimal sort of Transform stream.
-// Every written chunk gets output as-is.
+Writable.prototype.write = function (chunk, encoding, cb) {
+  var state = this._writableState;
+  var ret = false;
 
-module.exports = PassThrough;
+  if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
 
-var Transform = require('./_stream_transform');
+  if (Buffer.isBuffer(chunk)) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
 
-/*<replacement>*/
-var util = require('core-util-is');
-util.inherits = require('inherits');
-/*</replacement>*/
+  if (typeof cb !== 'function') cb = nop;
 
-util.inherits(PassThrough, Transform);
+  if (state.ended) writeAfterEnd(this, cb);else if (validChunk(this, state, chunk, cb)) {
+    state.pendingcb++;
+    ret = writeOrBuffer(this, state, chunk, encoding, cb);
+  }
 
-function PassThrough(options) {
-  if (!(this instanceof PassThrough))
-    return new PassThrough(options);
+  return ret;
+};
 
-  Transform.call(this, options);
-}
+Writable.prototype.cork = function () {
+  var state = this._writableState;
 
-PassThrough.prototype._transform = function(chunk, encoding, cb) {
-  cb(null, chunk);
+  state.corked++;
 };
 
-},{"./_stream_transform":19,"core-util-is":21,"inherits":12}],18:[function(require,module,exports){
-(function (process){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-module.exports = Readable;
+Writable.prototype.uncork = function () {
+  var state = this._writableState;
 
-/*<replacement>*/
-var isArray = require('isarray');
-/*</replacement>*/
+  if (state.corked) {
+    state.corked--;
 
+    if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
+  }
+};
 
-/*<replacement>*/
-var Buffer = require('buffer').Buffer;
-/*</replacement>*/
+Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
+  // node::ParseEncoding() requires lower case.
+  if (typeof encoding === 'string') encoding = encoding.toLowerCase();
+  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding);
+  this._writableState.defaultEncoding = encoding;
+  return this;
+};
 
-Readable.ReadableState = ReadableState;
+function decodeChunk(state, chunk, encoding) {
+  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
+    chunk = bufferShim.from(chunk, encoding);
+  }
+  return chunk;
+}
 
-var EE = require('events').EventEmitter;
+// if we're already writing something, then just put this
+// in the queue, and wait our turn.  Otherwise, call _write
+// If we return false, then we need a drain event, so set that flag.
+function writeOrBuffer(stream, state, chunk, encoding, cb) {
+  chunk = decodeChunk(state, chunk, encoding);
 
-/*<replacement>*/
-if (!EE.listenerCount) EE.listenerCount = function(emitter, type) {
-  return emitter.listeners(type).length;
-};
-/*</replacement>*/
+  if (Buffer.isBuffer(chunk)) encoding = 'buffer';
+  var len = state.objectMode ? 1 : chunk.length;
 
-var Stream = require('stream');
+  state.length += len;
 
-/*<replacement>*/
-var util = require('core-util-is');
-util.inherits = require('inherits');
-/*</replacement>*/
+  var ret = state.length < state.highWaterMark;
+  // we must ensure that previous needDrain will not be reset to false.
+  if (!ret) state.needDrain = true;
 
-var StringDecoder;
+  if (state.writing || state.corked) {
+    var last = state.lastBufferedRequest;
+    state.lastBufferedRequest = new WriteReq(chunk, encoding, cb);
+    if (last) {
+      last.next = state.lastBufferedRequest;
+    } else {
+      state.bufferedRequest = state.lastBufferedRequest;
+    }
+    state.bufferedRequestCount += 1;
+  } else {
+    doWrite(stream, state, false, len, chunk, encoding, cb);
+  }
 
+  return ret;
+}
 
-/*<replacement>*/
-var debug = require('util');
-if (debug && debug.debuglog) {
-  debug = debug.debuglog('stream');
-} else {
-  debug = function () {};
+function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+  state.writelen = len;
+  state.writecb = cb;
+  state.writing = true;
+  state.sync = true;
+  if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
+  state.sync = false;
 }
-/*</replacement>*/
 
+function onwriteError(stream, state, sync, er, cb) {
+  --state.pendingcb;
+  if (sync) processNextTick(cb, er);else cb(er);
 
-util.inherits(Readable, Stream);
+  stream._writableState.errorEmitted = true;
+  stream.emit('error', er);
+}
 
-function ReadableState(options, stream) {
-  var Duplex = require('./_stream_duplex');
+function onwriteStateUpdate(state) {
+  state.writing = false;
+  state.writecb = null;
+  state.length -= state.writelen;
+  state.writelen = 0;
+}
 
-  options = options || {};
+function onwrite(stream, er) {
+  var state = stream._writableState;
+  var sync = state.sync;
+  var cb = state.writecb;
 
-  // the point at which it stops calling _read() to fill the buffer
-  // Note: 0 is a valid value, means "don't call _read preemptively ever"
-  var hwm = options.highWaterMark;
-  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
-  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
+  onwriteStateUpdate(state);
 
-  // cast to ints.
-  this.highWaterMark = ~~this.highWaterMark;
+  if (er) onwriteError(stream, state, sync, er, cb);else {
+    // Check if we're actually ready to finish, but don't emit yet
+    var finished = needFinish(state);
 
-  this.buffer = [];
-  this.length = 0;
-  this.pipes = null;
-  this.pipesCount = 0;
-  this.flowing = null;
-  this.ended = false;
-  this.endEmitted = false;
-  this.reading = false;
+    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
+      clearBuffer(stream, state);
+    }
 
-  // a flag to be able to tell if the onwrite cb is called immediately,
-  // or on a later tick.  We set this to true at first, because any
-  // actions that shouldn't happen until "later" should generally also
-  // not happen before the first write call.
-  this.sync = true;
+    if (sync) {
+      /*<replacement>*/
+      asyncWrite(afterWrite, stream, state, finished, cb);
+      /*</replacement>*/
+    } else {
+        afterWrite(stream, state, finished, cb);
+      }
+  }
+}
 
-  // whenever we return null, then we set a flag to say
-  // that we're awaiting a 'readable' event emission.
-  this.needReadable = false;
-  this.emittedReadable = false;
-  this.readableListening = false;
+function afterWrite(stream, state, finished, cb) {
+  if (!finished) onwriteDrain(stream, state);
+  state.pendingcb--;
+  cb();
+  finishMaybe(stream, state);
+}
 
+// Must force callback to be called on nextTick, so that we don't
+// emit 'drain' before the write() consumer gets the 'false' return
+// value, and has a chance to attach a 'drain' listener.
+function onwriteDrain(stream, state) {
+  if (state.length === 0 && state.needDrain) {
+    state.needDrain = false;
+    stream.emit('drain');
+  }
+}
 
-  // object stream flag. Used to make read(n) ignore n and to
-  // make all the buffer merging and length checks go away
-  this.objectMode = !!options.objectMode;
+// if there's something in the buffer waiting, then process it
+function clearBuffer(stream, state) {
+  state.bufferProcessing = true;
+  var entry = state.bufferedRequest;
 
-  if (stream instanceof Duplex)
-    this.objectMode = this.objectMode || !!options.readableObjectMode;
+  if (stream._writev && entry && entry.next) {
+    // Fast case, write everything using _writev()
+    var l = state.bufferedRequestCount;
+    var buffer = new Array(l);
+    var holder = state.corkedRequestsFree;
+    holder.entry = entry;
 
-  // Crypto is kind of old and crusty.  Historically, its default string
-  // encoding is 'binary' so we have to make this configurable.
-  // Everything else in the universe uses 'utf8', though.
-  this.defaultEncoding = options.defaultEncoding || 'utf8';
+    var count = 0;
+    while (entry) {
+      buffer[count] = entry;
+      entry = entry.next;
+      count += 1;
+    }
 
-  // when piping, we only care about 'readable' events that happen
-  // after read()ing all the bytes and not getting any pushback.
-  this.ranOut = false;
+    doWrite(stream, state, true, state.length, buffer, '', holder.finish);
 
-  // the number of writers that are awaiting a drain event in .pipe()s
-  this.awaitDrain = 0;
+    // doWrite is almost always async, defer these to save a bit of time
+    // as the hot path ends with doWrite
+    state.pendingcb++;
+    state.lastBufferedRequest = null;
+    if (holder.next) {
+      state.corkedRequestsFree = holder.next;
+      holder.next = null;
+    } else {
+      state.corkedRequestsFree = new CorkedRequest(state);
+    }
+  } else {
+    // Slow case, write chunks one-by-one
+    while (entry) {
+      var chunk = entry.chunk;
+      var encoding = entry.encoding;
+      var cb = entry.callback;
+      var len = state.objectMode ? 1 : chunk.length;
 
-  // if true, a maybeReadMore has been scheduled
-  this.readingMore = false;
+      doWrite(stream, state, false, len, chunk, encoding, cb);
+      entry = entry.next;
+      // if we didn't call the onwrite immediately, then
+      // it means that we need to wait until it does.
+      // also, that means that the chunk and cb are currently
+      // being processed, so move the buffer counter past them.
+      if (state.writing) {
+        break;
+      }
+    }
 
-  this.decoder = null;
-  this.encoding = null;
-  if (options.encoding) {
-    if (!StringDecoder)
-      StringDecoder = require('string_decoder/').StringDecoder;
-    this.decoder = new StringDecoder(options.encoding);
-    this.encoding = options.encoding;
+    if (entry === null) state.lastBufferedRequest = null;
   }
-}
 
-function Readable(options) {
-  var Duplex = require('./_stream_duplex');
+  state.bufferedRequestCount = 0;
+  state.bufferedRequest = entry;
+  state.bufferProcessing = false;
+}
 
-  if (!(this instanceof Readable))
-    return new Readable(options);
+Writable.prototype._write = function (chunk, encoding, cb) {
+  cb(new Error('_write() is not implemented'));
+};
 
-  this._readableState = new ReadableState(options, this);
+Writable.prototype._writev = null;
 
-  // legacy
-  this.readable = true;
+Writable.prototype.end = function (chunk, encoding, cb) {
+  var state = this._writableState;
 
-  Stream.call(this);
-}
+  if (typeof chunk === 'function') {
+    cb = chunk;
+    chunk = null;
+    encoding = null;
+  } else if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
 
-// Manually shove something into the read() buffer.
-// This returns true if the highWaterMark has not been hit yet,
-// similar to how Writable.write() returns true if you should
-// write() some more.
-Readable.prototype.push = function(chunk, encoding) {
-  var state = this._readableState;
+  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);
 
-  if (util.isString(chunk) && !state.objectMode) {
-    encoding = encoding || state.defaultEncoding;
-    if (encoding !== state.encoding) {
-      chunk = new Buffer(chunk, encoding);
-      encoding = '';
-    }
+  // .end() fully uncorks
+  if (state.corked) {
+    state.corked = 1;
+    this.uncork();
   }
 
-  return readableAddChunk(this, state, chunk, encoding, false);
+  // ignore unnecessary end() calls.
+  if (!state.ending && !state.finished) endWritable(this, state, cb);
 };
 
-// Unshift should *always* be something directly out of read()
-Readable.prototype.unshift = function(chunk) {
-  var state = this._readableState;
-  return readableAddChunk(this, state, chunk, '', true);
-};
+function needFinish(state) {
+  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
+}
 
-function readableAddChunk(stream, state, chunk, encoding, addToFront) {
-  var er = chunkInvalid(state, chunk);
-  if (er) {
-    stream.emit('error', er);
-  } else if (util.isNullOrUndefined(chunk)) {
-    state.reading = false;
-    if (!state.ended)
-      onEofChunk(stream, state);
-  } else if (state.objectMode || chunk && chunk.length > 0) {
-    if (state.ended && !addToFront) {
-      var e = new Error('stream.push() after EOF');
-      stream.emit('error', e);
-    } else if (state.endEmitted && addToFront) {
-      var e = new Error('stream.unshift() after end event');
-      stream.emit('error', e);
+function prefinish(stream, state) {
+  if (!state.prefinished) {
+    state.prefinished = true;
+    stream.emit('prefinish');
+  }
+}
+
+function finishMaybe(stream, state) {
+  var need = needFinish(state);
+  if (need) {
+    if (state.pendingcb === 0) {
+      prefinish(stream, state);
+      state.finished = true;
+      stream.emit('finish');
     } else {
-      if (state.decoder && !addToFront && !encoding)
-        chunk = state.decoder.write(chunk);
+      prefinish(stream, state);
+    }
+  }
+  return need;
+}
 
-      if (!addToFront)
-        state.reading = false;
+function endWritable(stream, state, cb) {
+  state.ending = true;
+  finishMaybe(stream, state);
+  if (cb) {
+    if (state.finished) processNextTick(cb);else stream.once('finish', cb);
+  }
+  state.ended = true;
+  stream.writable = false;
+}
 
-      // if we want the data now, just emit it.
-      if (state.flowing && state.length === 0 && !state.sync) {
-        stream.emit('data', chunk);
-        stream.read(0);
-      } else {
-        // update the buffer info.
-        state.length += state.objectMode ? 1 : chunk.length;
-        if (addToFront)
-          state.buffer.unshift(chunk);
-        else
-          state.buffer.push(chunk);
+// It seems a linked list but it is not
+// there will be only 2 of these for each stream
+function CorkedRequest(state) {
+  var _this = this;
 
-        if (state.needReadable)
-          emitReadable(stream);
-      }
+  this.next = null;
+  this.entry = null;
 
-      maybeReadMore(stream, state);
+  this.finish = function (err) {
+    var entry = _this.entry;
+    _this.entry = null;
+    while (entry) {
+      var cb = entry.callback;
+      state.pendingcb--;
+      cb(err);
+      entry = entry.next;
     }
-  } else if (!addToFront) {
-    state.reading = false;
-  }
-
-  return needMoreData(state);
+    if (state.corkedRequestsFree) {
+      state.corkedRequestsFree.next = _this;
+    } else {
+      state.corkedRequestsFree = _this;
+    }
+  };
 }
+}).call(this,require('_process'))
+},{"./_stream_duplex":15,"_process":13,"buffer":5,"buffer-shims":4,"core-util-is":6,"events":7,"inherits":9,"process-nextick-args":12,"util-deprecate":27}],20:[function(require,module,exports){
+'use strict';
 
+var Buffer = require('buffer').Buffer;
+/*<replacement>*/
+var bufferShim = require('buffer-shims');
+/*</replacement>*/
 
+module.exports = BufferList;
 
-// if it's past the high water mark, we can push in some more.
-// Also, if we have no data yet, we can stand some
-// more bytes.  This is to work around cases where hwm=0,
-// such as the repl.  Also, if the push() triggered a
-// readable event, and the user called read(largeNumber) such that
-// needReadable was set, then we ought to push more, so that another
-// 'readable' event will be triggered.
-function needMoreData(state) {
-  return !state.ended &&
-         (state.needReadable ||
-          state.length < state.highWaterMark ||
-          state.length === 0);
+function BufferList() {
+  this.head = null;
+  this.tail = null;
+  this.length = 0;
 }
 
-// backwards compatibility.
-Readable.prototype.setEncoding = function(enc) {
-  if (!StringDecoder)
-    StringDecoder = require('string_decoder/').StringDecoder;
-  this._readableState.decoder = new StringDecoder(enc);
-  this._readableState.encoding = enc;
-  return this;
+BufferList.prototype.push = function (v) {
+  var entry = { data: v, next: null };
+  if (this.length > 0) this.tail.next = entry;else this.head = entry;
+  this.tail = entry;
+  ++this.length;
 };
 
-// Don't raise the hwm > 128MB
-var MAX_HWM = 0x800000;
-function roundUpToNextPowerOf2(n) {
-  if (n >= MAX_HWM) {
-    n = MAX_HWM;
-  } else {
-    // Get the next highest power of 2
-    n--;
-    for (var p = 1; p < 32; p <<= 1) n |= n >> p;
-    n++;
+BufferList.prototype.unshift = function (v) {
+  var entry = { data: v, next: this.head };
+  if (this.length === 0) this.tail = entry;
+  this.head = entry;
+  ++this.length;
+};
+
+BufferList.prototype.shift = function () {
+  if (this.length === 0) return;
+  var ret = this.head.data;
+  if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
+  --this.length;
+  return ret;
+};
+
+BufferList.prototype.clear = function () {
+  this.head = this.tail = null;
+  this.length = 0;
+};
+
+BufferList.prototype.join = function (s) {
+  if (this.length === 0) return '';
+  var p = this.head;
+  var ret = '' + p.data;
+  while (p = p.next) {
+    ret += s + p.data;
+  }return ret;
+};
+
+BufferList.prototype.concat = function (n) {
+  if (this.length === 0) return bufferShim.alloc(0);
+  if (this.length === 1) return this.head.data;
+  var ret = bufferShim.allocUnsafe(n >>> 0);
+  var p = this.head;
+  var i = 0;
+  while (p) {
+    p.data.copy(ret, i);
+    i += p.data.length;
+    p = p.next;
   }
-  return n;
+  return ret;
+};
+},{"buffer":5,"buffer-shims":4}],21:[function(require,module,exports){
+module.exports = require("./lib/_stream_passthrough.js")
+
+},{"./lib/_stream_passthrough.js":16}],22:[function(require,module,exports){
+(function (process){
+var Stream = (function (){
+  try {
+    return require('st' + 'ream'); // hack to fix a circular dependency issue when used with browserify
+  } catch(_){}
+}());
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Stream = Stream || exports;
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
+
+if (!process.browser && process.env.READABLE_STREAM === 'disable' && Stream) {
+  module.exports = Stream;
 }
 
-function howMuchToRead(n, state) {
-  if (state.length === 0 && state.ended)
-    return 0;
+}).call(this,require('_process'))
+},{"./lib/_stream_duplex.js":15,"./lib/_stream_passthrough.js":16,"./lib/_stream_readable.js":17,"./lib/_stream_transform.js":18,"./lib/_stream_writable.js":19,"_process":13}],23:[function(require,module,exports){
+module.exports = require("./lib/_stream_transform.js")
 
-  if (state.objectMode)
-    return n === 0 ? 0 : 1;
+},{"./lib/_stream_transform.js":18}],24:[function(require,module,exports){
+module.exports = require("./lib/_stream_writable.js")
+
+},{"./lib/_stream_writable.js":19}],25:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+module.exports = Stream;
+
+var EE = require('events').EventEmitter;
+var inherits = require('inherits');
+
+inherits(Stream, EE);
+Stream.Readable = require('readable-stream/readable.js');
+Stream.Writable = require('readable-stream/writable.js');
+Stream.Duplex = require('readable-stream/duplex.js');
+Stream.Transform = require('readable-stream/transform.js');
+Stream.PassThrough = require('readable-stream/passthrough.js');
 
-  if (isNaN(n) || util.isNull(n)) {
-    // only flow one buffer at a time
-    if (state.flowing && state.buffer.length)
-      return state.buffer[0].length;
-    else
-      return state.length;
-  }
+// Backwards-compat with node 0.4.x
+Stream.Stream = Stream;
 
-  if (n <= 0)
-    return 0;
 
-  // If we're asking for more than the target buffer level,
-  // then raise the water mark.  Bump up to the next highest
-  // power of 2, to prevent increasing it excessively in tiny
-  // amounts.
-  if (n > state.highWaterMark)
-    state.highWaterMark = roundUpToNextPowerOf2(n);
 
-  // don't have that much.  return null, unless we've ended.
-  if (n > state.length) {
-    if (!state.ended) {
-      state.needReadable = true;
-      return 0;
-    } else
-      return state.length;
-  }
+// old-style streams.  Note that the pipe method (the only relevant
+// part of this class) is overridden in the Readable class.
 
-  return n;
+function Stream() {
+  EE.call(this);
 }
 
-// you can override either this method, or the async _read(n) below.
-Readable.prototype.read = function(n) {
-  debug('read', n);
-  var state = this._readableState;
-  var nOrig = n;
-
-  if (!util.isNumber(n) || n > 0)
-    state.emittedReadable = false;
+Stream.prototype.pipe = function(dest, options) {
+  var source = this;
 
-  // if we're doing read(0) to trigger a readable event, but we
-  // already have a bunch of data in the buffer, then just trigger
-  // the 'readable' event and move on.
-  if (n === 0 &&
-      state.needReadable &&
-      (state.length >= state.highWaterMark || state.ended)) {
-    debug('read: emitReadable', state.length, state.ended);
-    if (state.length === 0 && state.ended)
-      endReadable(this);
-    else
-      emitReadable(this);
-    return null;
+  function ondata(chunk) {
+    if (dest.writable) {
+      if (false === dest.write(chunk) && source.pause) {
+        source.pause();
+      }
+    }
   }
 
-  n = howMuchToRead(n, state);
+  source.on('data', ondata);
 
-  // if we've ended, and we're now clear, then finish it up.
-  if (n === 0 && state.ended) {
-    if (state.length === 0)
-      endReadable(this);
-    return null;
+  function ondrain() {
+    if (source.readable && source.resume) {
+      source.resume();
+    }
   }
 
-  // All the actual chunk generation logic needs to be
-  // *below* the call to _read.  The reason is that in certain
-  // synthetic stream cases, such as passthrough streams, _read
-  // may be a completely synchronous operation which may change
-  // the state of the read buffer, providing enough data when
-  // before there was *not* enough.
-  //
-  // So, the steps are:
-  // 1. Figure out what the state of things will be after we do
-  // a read from the buffer.
-  //
-  // 2. If that resulting state will trigger a _read, then call _read.
-  // Note that this may be asynchronous, or synchronous.  Yes, it is
-  // deeply ugly to write APIs this way, but that still doesn't mean
-  // that the Readable class should behave improperly, as streams are
-  // designed to be sync/async agnostic.
-  // Take note if the _read call is sync or async (ie, if the read call
-  // has returned yet), so that we know whether or not it's safe to emit
-  // 'readable' etc.
-  //
-  // 3. Actually pull the requested chunks out of the buffer and return.
-
-  // if we need a readable event, then we need to do some reading.
-  var doRead = state.needReadable;
-  debug('need readable', doRead);
+  dest.on('drain', ondrain);
 
-  // if we currently have less than the highWaterMark, then also read some
-  if (state.length === 0 || state.length - n < state.highWaterMark) {
-    doRead = true;
-    debug('length less than watermark', doRead);
+  // If the 'end' option is not supplied, dest.end() will be called when
+  // source gets the 'end' or 'close' events.  Only dest.end() once.
+  if (!dest._isStdio && (!options || options.end !== false)) {
+    source.on('end', onend);
+    source.on('close', onclose);
   }
 
-  // however, if we've ended, then there's no point, and if we're already
-  // reading, then it's unnecessary.
-  if (state.ended || state.reading) {
-    doRead = false;
-    debug('reading or ended', doRead);
-  }
+  var didOnEnd = false;
+  function onend() {
+    if (didOnEnd) return;
+    didOnEnd = true;
 
-  if (doRead) {
-    debug('do read');
-    state.reading = true;
-    state.sync = true;
-    // if the length is currently zero, then we *need* a readable event.
-    if (state.length === 0)
-      state.needReadable = true;
-    // call internal read method
-    this._read(state.highWaterMark);
-    state.sync = false;
+    dest.end();
   }
 
-  // If _read pushed data synchronously, then `reading` will be false,
-  // and we need to re-evaluate how much data we can return to the user.
-  if (doRead && !state.reading)
-    n = howMuchToRead(nOrig, state);
 
-  var ret;
-  if (n > 0)
-    ret = fromList(n, state);
-  else
-    ret = null;
+  function onclose() {
+    if (didOnEnd) return;
+    didOnEnd = true;
 
-  if (util.isNull(ret)) {
-    state.needReadable = true;
-    n = 0;
+    if (typeof dest.destroy === 'function') dest.destroy();
   }
 
-  state.length -= n;
+  // don't leave dangling pipes when there are errors.
+  function onerror(er) {
+    cleanup();
+    if (EE.listenerCount(this, 'error') === 0) {
+      throw er; // Unhandled stream error in pipe.
+    }
+  }
 
-  // If we have nothing in the buffer, then we want to know
-  // as soon as we *do* get something into the buffer.
-  if (state.length === 0 && !state.ended)
-    state.needReadable = true;
+  source.on('error', onerror);
+  dest.on('error', onerror);
 
-  // If we tried to read() past the EOF, then emit end on the next tick.
-  if (nOrig !== n && state.ended && state.length === 0)
-    endReadable(this);
+  // remove all the event listeners that were added.
+  function cleanup() {
+    source.removeListener('data', ondata);
+    dest.removeListener('drain', ondrain);
 
-  if (!util.isNull(ret))
-    this.emit('data', ret);
+    source.removeListener('end', onend);
+    source.removeListener('close', onclose);
 
-  return ret;
-};
+    source.removeListener('error', onerror);
+    dest.removeListener('error', onerror);
 
-function chunkInvalid(state, chunk) {
-  var er = null;
-  if (!util.isBuffer(chunk) &&
-      !util.isString(chunk) &&
-      !util.isNullOrUndefined(chunk) &&
-      !state.objectMode) {
-    er = new TypeError('Invalid non-string/buffer chunk');
+    source.removeListener('end', cleanup);
+    source.removeListener('close', cleanup);
+
+    dest.removeListener('close', cleanup);
   }
-  return er;
-}
 
+  source.on('end', cleanup);
+  source.on('close', cleanup);
 
-function onEofChunk(stream, state) {
-  if (state.decoder && !state.ended) {
-    var chunk = state.decoder.end();
-    if (chunk && chunk.length) {
-      state.buffer.push(chunk);
-      state.length += state.objectMode ? 1 : chunk.length;
-    }
-  }
-  state.ended = true;
+  dest.on('close', cleanup);
 
-  // emit 'readable' now to make sure it gets picked up.
-  emitReadable(stream);
-}
+  dest.emit('pipe', source);
 
-// Don't emit readable right away in sync mode, because this can trigger
-// another read() call => stack overflow.  This way, it might trigger
-// a nextTick recursion warning, but that's not so bad.
-function emitReadable(stream) {
-  var state = stream._readableState;
-  state.needReadable = false;
-  if (!state.emittedReadable) {
-    debug('emitReadable', state.flowing);
-    state.emittedReadable = true;
-    if (state.sync)
-      process.nextTick(function() {
-        emitReadable_(stream);
-      });
-    else
-      emitReadable_(stream);
-  }
-}
+  // Allow for unix-like usage: A.pipe(B).pipe(C)
+  return dest;
+};
 
-function emitReadable_(stream) {
-  debug('emit readable');
-  stream.emit('readable');
-  flow(stream);
-}
+},{"events":7,"inherits":9,"readable-stream/duplex.js":14,"readable-stream/passthrough.js":21,"readable-stream/readable.js":22,"readable-stream/transform.js":23,"readable-stream/writable.js":24}],26:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var Buffer = require('buffer').Buffer;
+
+var isBufferEncoding = Buffer.isEncoding
+  || function(encoding) {
+       switch (encoding && encoding.toLowerCase()) {
+         case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true;
+         default: return false;
+       }
+     }
 
 
-// at this point, the user has presumably seen the 'readable' event,
-// and called read() to consume some data.  that may have triggered
-// in turn another _read(n) call, in which case reading = true if
-// it's in progress.
-// However, if we're not ended, or reading, and the length < hwm,
-// then go ahead and try to read some more preemptively.
-function maybeReadMore(stream, state) {
-  if (!state.readingMore) {
-    state.readingMore = true;
-    process.nextTick(function() {
-      maybeReadMore_(stream, state);
-    });
+function assertEncoding(encoding) {
+  if (encoding && !isBufferEncoding(encoding)) {
+    throw new Error('Unknown encoding: ' + encoding);
   }
 }
 
-function maybeReadMore_(stream, state) {
-  var len = state.length;
-  while (!state.reading && !state.flowing && !state.ended &&
-         state.length < state.highWaterMark) {
-    debug('maybeReadMore read 0');
-    stream.read(0);
-    if (len === state.length)
-      // didn't get any data, stop spinning.
+// StringDecoder provides an interface for efficiently splitting a series of
+// buffers into a series of JS strings without breaking apart multi-byte
+// characters. CESU-8 is handled as part of the UTF-8 encoding.
+//
+// @TODO Handling all encodings inside a single object makes it very difficult
+// to reason about this code, so it should be split up in the future.
+// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code
+// points as used by CESU-8.
+var StringDecoder = exports.StringDecoder = function(encoding) {
+  this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');
+  assertEncoding(encoding);
+  switch (this.encoding) {
+    case 'utf8':
+      // CESU-8 represents each of Surrogate Pair by 3-bytes
+      this.surrogateSize = 3;
       break;
-    else
-      len = state.length;
-  }
-  state.readingMore = false;
-}
-
-// abstract method.  to be overridden in specific implementation classes.
-// call cb(er, data) where data is <= n in length.
-// for virtual (non-string, non-buffer) streams, "length" is somewhat
-// arbitrary, and perhaps not very meaningful.
-Readable.prototype._read = function(n) {
-  this.emit('error', new Error('not implemented'));
-};
-
-Readable.prototype.pipe = function(dest, pipeOpts) {
-  var src = this;
-  var state = this._readableState;
-
-  switch (state.pipesCount) {
-    case 0:
-      state.pipes = dest;
+    case 'ucs2':
+    case 'utf16le':
+      // UTF-16 represents each of Surrogate Pair by 2-bytes
+      this.surrogateSize = 2;
+      this.detectIncompleteChar = utf16DetectIncompleteChar;
       break;
-    case 1:
-      state.pipes = [state.pipes, dest];
+    case 'base64':
+      // Base-64 stores 3 bytes in 4 chars, and pads the remainder.
+      this.surrogateSize = 3;
+      this.detectIncompleteChar = base64DetectIncompleteChar;
       break;
     default:
-      state.pipes.push(dest);
-      break;
+      this.write = passThroughWrite;
+      return;
   }
-  state.pipesCount += 1;
-  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
 
-  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&
-              dest !== process.stdout &&
-              dest !== process.stderr;
+  // Enough space to store all bytes of a single character. UTF-8 needs 4
+  // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate).
+  this.charBuffer = new Buffer(6);
+  // Number of bytes received for the current incomplete multi-byte character.
+  this.charReceived = 0;
+  // Number of bytes expected for the current incomplete multi-byte character.
+  this.charLength = 0;
+};
 
-  var endFn = doEnd ? onend : cleanup;
-  if (state.endEmitted)
-    process.nextTick(endFn);
-  else
-    src.once('end', endFn);
 
-  dest.on('unpipe', onunpipe);
-  function onunpipe(readable) {
-    debug('onunpipe');
-    if (readable === src) {
-      cleanup();
+// write decodes the given buffer and returns it as JS string that is
+// guaranteed to not contain any partial multi-byte characters. Any partial
+// character found at the end of the buffer is buffered up, and will be
+// returned when calling write again with the remaining bytes.
+//
+// Note: Converting a Buffer containing an orphan surrogate to a String
+// currently works, but converting a String to a Buffer (via `new Buffer`, or
+// Buffer#write) will replace incomplete surrogates with the unicode
+// replacement character. See https://codereview.chromium.org/121173009/ .
+StringDecoder.prototype.write = function(buffer) {
+  var charStr = '';
+  // if our last write ended with an incomplete multibyte character
+  while (this.charLength) {
+    // determine how many remaining bytes this buffer has to offer for this char
+    var available = (buffer.length >= this.charLength - this.charReceived) ?
+        this.charLength - this.charReceived :
+        buffer.length;
+
+    // add the new bytes to the char buffer
+    buffer.copy(this.charBuffer, this.charReceived, 0, available);
+    this.charReceived += available;
+
+    if (this.charReceived < this.charLength) {
+      // still not enough chars in this buffer? wait for more ...
+      return '';
     }
-  }
 
-  function onend() {
-    debug('onend');
-    dest.end();
-  }
+    // remove bytes belonging to the current character from the buffer
+    buffer = buffer.slice(available, buffer.length);
 
-  // when the dest drains, it reduces the awaitDrain counter
-  // on the source.  This would be more elegant with a .once()
-  // handler in flow(), but adding and removing repeatedly is
-  // too slow.
-  var ondrain = pipeOnDrain(src);
-  dest.on('drain', ondrain);
+    // get the character that was split
+    charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);
 
-  function cleanup() {
-    debug('cleanup');
-    // cleanup event handlers once the pipe is broken
-    dest.removeListener('close', onclose);
-    dest.removeListener('finish', onfinish);
-    dest.removeListener('drain', ondrain);
-    dest.removeListener('error', onerror);
-    dest.removeListener('unpipe', onunpipe);
-    src.removeListener('end', onend);
-    src.removeListener('end', cleanup);
-    src.removeListener('data', ondata);
+    // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
+    var charCode = charStr.charCodeAt(charStr.length - 1);
+    if (charCode >= 0xD800 && charCode <= 0xDBFF) {
+      this.charLength += this.surrogateSize;
+      charStr = '';
+      continue;
+    }
+    this.charReceived = this.charLength = 0;
 
-    // if the reader is waiting for a drain event from this
-    // specific writer, then it would cause it to never start
-    // flowing again.
-    // So, if this is awaiting a drain, then we just call it now.
-    // If we don't know, then assume that we are waiting for one.
-    if (state.awaitDrain &&
-        (!dest._writableState || dest._writableState.needDrain))
-      ondrain();
+    // if there are no more bytes in this buffer, just emit our char
+    if (buffer.length === 0) {
+      return charStr;
+    }
+    break;
   }
 
-  src.on('data', ondata);
-  function ondata(chunk) {
-    debug('ondata');
-    var ret = dest.write(chunk);
-    if (false === ret) {
-      debug('false write response, pause',
-            src._readableState.awaitDrain);
-      src._readableState.awaitDrain++;
-      src.pause();
-    }
+  // determine and set charLength / charReceived
+  this.detectIncompleteChar(buffer);
+
+  var end = buffer.length;
+  if (this.charLength) {
+    // buffer the incomplete character bytes we got
+    buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end);
+    end -= this.charReceived;
   }
 
-  // if the dest has an error, then stop piping into it.
-  // however, don't suppress the throwing behavior for this.
-  function onerror(er) {
-    debug('onerror', er);
-    unpipe();
-    dest.removeListener('error', onerror);
-    if (EE.listenerCount(dest, 'error') === 0)
-      dest.emit('error', er);
+  charStr += buffer.toString(this.encoding, 0, end);
+
+  var end = charStr.length - 1;
+  var charCode = charStr.charCodeAt(end);
+  // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
+  if (charCode >= 0xD800 && charCode <= 0xDBFF) {
+    var size = this.surrogateSize;
+    this.charLength += size;
+    this.charReceived += size;
+    this.charBuffer.copy(this.charBuffer, size, 0, size);
+    buffer.copy(this.charBuffer, 0, 0, size);
+    return charStr.substring(0, end);
   }
-  // This is a brutally ugly hack to make sure that our error handler
-  // is attached before any userland ones.  NEVER DO THIS.
-  if (!dest._events || !dest._events.error)
-    dest.on('error', onerror);
-  else if (isArray(dest._events.error))
-    dest._events.error.unshift(onerror);
-  else
-    dest._events.error = [onerror, dest._events.error];
 
+  // or just emit the charStr
+  return charStr;
+};
+
+// detectIncompleteChar determines if there is an incomplete UTF-8 character at
+// the end of the given buffer. If so, it sets this.charLength to the byte
+// length that character, and sets this.charReceived to the number of bytes
+// that are available for this character.
+StringDecoder.prototype.detectIncompleteChar = function(buffer) {
+  // determine how many bytes we have to check at the end of this buffer
+  var i = (buffer.length >= 3) ? 3 : buffer.length;
+
+  // Figure out if one of the last i bytes of our buffer announces an
+  // incomplete char.
+  for (; i > 0; i--) {
+    var c = buffer[buffer.length - i];
 
+    // See http://en.wikipedia.org/wiki/UTF-8#Description
 
-  // Both close and finish should trigger unpipe, but only once.
-  function onclose() {
-    dest.removeListener('finish', onfinish);
-    unpipe();
-  }
-  dest.once('close', onclose);
-  function onfinish() {
-    debug('onfinish');
-    dest.removeListener('close', onclose);
-    unpipe();
-  }
-  dest.once('finish', onfinish);
+    // 110XXXXX
+    if (i == 1 && c >> 5 == 0x06) {
+      this.charLength = 2;
+      break;
+    }
+
+    // 1110XXXX
+    if (i <= 2 && c >> 4 == 0x0E) {
+      this.charLength = 3;
+      break;
+    }
 
-  function unpipe() {
-    debug('unpipe');
-    src.unpipe(dest);
+    // 11110XXX
+    if (i <= 3 && c >> 3 == 0x1E) {
+      this.charLength = 4;
+      break;
+    }
   }
+  this.charReceived = i;
+};
 
-  // tell the dest that it's being piped to
-  dest.emit('pipe', src);
+StringDecoder.prototype.end = function(buffer) {
+  var res = '';
+  if (buffer && buffer.length)
+    res = this.write(buffer);
 
-  // start the flow if it hasn't been started already.
-  if (!state.flowing) {
-    debug('pipe resume');
-    src.resume();
+  if (this.charReceived) {
+    var cr = this.charReceived;
+    var buf = this.charBuffer;
+    var enc = this.encoding;
+    res += buf.slice(0, cr).toString(enc);
   }
 
-  return dest;
+  return res;
 };
 
-function pipeOnDrain(src) {
-  return function() {
-    var state = src._readableState;
-    debug('pipeOnDrain', state.awaitDrain);
-    if (state.awaitDrain)
-      state.awaitDrain--;
-    if (state.awaitDrain === 0 && EE.listenerCount(src, 'data')) {
-      state.flowing = true;
-      flow(src);
-    }
-  };
+function passThroughWrite(buffer) {
+  return buffer.toString(this.encoding);
 }
 
+function utf16DetectIncompleteChar(buffer) {
+  this.charReceived = buffer.length % 2;
+  this.charLength = this.charReceived ? 2 : 0;
+}
 
-Readable.prototype.unpipe = function(dest) {
-  var state = this._readableState;
+function base64DetectIncompleteChar(buffer) {
+  this.charReceived = buffer.length % 3;
+  this.charLength = this.charReceived ? 3 : 0;
+}
 
-  // if we're not piping anywhere, then do nothing.
-  if (state.pipesCount === 0)
-    return this;
+},{"buffer":5}],27:[function(require,module,exports){
+(function (global){
 
-  // just one destination.  most common case.
-  if (state.pipesCount === 1) {
-    // passed in one, but it's not the right one.
-    if (dest && dest !== state.pipes)
-      return this;
+/**
+ * Module exports.
+ */
 
-    if (!dest)
-      dest = state.pipes;
+module.exports = deprecate;
 
-    // got a match.
-    state.pipes = null;
-    state.pipesCount = 0;
-    state.flowing = false;
-    if (dest)
-      dest.emit('unpipe', this);
-    return this;
+/**
+ * Mark that a method should not be used.
+ * Returns a modified function which warns once by default.
+ *
+ * If `localStorage.noDeprecation = true` is set, then it is a no-op.
+ *
+ * If `localStorage.throwDeprecation = true` is set, then deprecated functions
+ * will throw an Error when invoked.
+ *
+ * If `localStorage.traceDeprecation = true` is set, then deprecated functions
+ * will invoke `console.trace()` instead of `console.error()`.
+ *
+ * @param {Function} fn - the function to deprecate
+ * @param {String} msg - the string to print to the console when `fn` is invoked
+ * @returns {Function} a new "deprecated" version of `fn`
+ * @api public
+ */
+
+function deprecate (fn, msg) {
+  if (config('noDeprecation')) {
+    return fn;
   }
 
-  // slow case. multiple pipe destinations.
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (config('throwDeprecation')) {
+        throw new Error(msg);
+      } else if (config('traceDeprecation')) {
+        console.trace(msg);
+      } else {
+        console.warn(msg);
+      }
+      warned = true;
+    }
+    return fn.apply(this, arguments);
+  }
 
-  if (!dest) {
-    // remove all.
-    var dests = state.pipes;
-    var len = state.pipesCount;
-    state.pipes = null;
-    state.pipesCount = 0;
-    state.flowing = false;
+  return deprecated;
+}
 
-    for (var i = 0; i < len; i++)
-      dests[i].emit('unpipe', this);
-    return this;
-  }
+/**
+ * Checks `localStorage` for boolean values for the given `name`.
+ *
+ * @param {String} name
+ * @returns {Boolean}
+ * @api private
+ */
 
-  // try to find the right one.
-  var i = indexOf(state.pipes, dest);
-  if (i === -1)
-    return this;
+function config (name) {
+  // accessing global.localStorage can trigger a DOMException in sandboxed iframes
+  try {
+    if (!global.localStorage) return false;
+  } catch (_) {
+    return false;
+  }
+  var val = global.localStorage[name];
+  if (null == val) return false;
+  return String(val).toLowerCase() === 'true';
+}
 
-  state.pipes.splice(i, 1);
-  state.pipesCount -= 1;
-  if (state.pipesCount === 1)
-    state.pipes = state.pipes[0];
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{}],28:[function(require,module,exports){
+arguments[4][9][0].apply(exports,arguments)
+},{"dup":9}],29:[function(require,module,exports){
+module.exports = function isBuffer(arg) {
+  return arg && typeof arg === 'object'
+    && typeof arg.copy === 'function'
+    && typeof arg.fill === 'function'
+    && typeof arg.readUInt8 === 'function';
+}
+},{}],30:[function(require,module,exports){
+(function (process,global){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-  dest.emit('unpipe', this);
+var formatRegExp = /%[sdj%]/g;
+exports.format = function(f) {
+  if (!isString(f)) {
+    var objects = [];
+    for (var i = 0; i < arguments.length; i++) {
+      objects.push(inspect(arguments[i]));
+    }
+    return objects.join(' ');
+  }
 
-  return this;
+  var i = 1;
+  var args = arguments;
+  var len = args.length;
+  var str = String(f).replace(formatRegExp, function(x) {
+    if (x === '%%') return '%';
+    if (i >= len) return x;
+    switch (x) {
+      case '%s': return String(args[i++]);
+      case '%d': return Number(args[i++]);
+      case '%j':
+        try {
+          return JSON.stringify(args[i++]);
+        } catch (_) {
+          return '[Circular]';
+        }
+      default:
+        return x;
+    }
+  });
+  for (var x = args[i]; i < len; x = args[++i]) {
+    if (isNull(x) || !isObject(x)) {
+      str += ' ' + x;
+    } else {
+      str += ' ' + inspect(x);
+    }
+  }
+  return str;
 };
 
-// set up data events if they are asked for
-// Ensure readable listeners eventually get something
-Readable.prototype.on = function(ev, fn) {
-  var res = Stream.prototype.on.call(this, ev, fn);
 
-  // If listening to data, and it has not explicitly been paused,
-  // then call resume to start the flow of data on the next tick.
-  if (ev === 'data' && false !== this._readableState.flowing) {
-    this.resume();
+// Mark that a method should not be used.
+// Returns a modified function which warns once by default.
+// If --no-deprecation is set, then it is a no-op.
+exports.deprecate = function(fn, msg) {
+  // Allow for deprecating things in the process of starting up.
+  if (isUndefined(global.process)) {
+    return function() {
+      return exports.deprecate(fn, msg).apply(this, arguments);
+    };
   }
 
-  if (ev === 'readable' && this.readable) {
-    var state = this._readableState;
-    if (!state.readableListening) {
-      state.readableListening = true;
-      state.emittedReadable = false;
-      state.needReadable = true;
-      if (!state.reading) {
-        var self = this;
-        process.nextTick(function() {
-          debug('readable nexttick read 0');
-          self.read(0);
-        });
-      } else if (state.length) {
-        emitReadable(this, state);
+  if (process.noDeprecation === true) {
+    return fn;
+  }
+
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (process.throwDeprecation) {
+        throw new Error(msg);
+      } else if (process.traceDeprecation) {
+        console.trace(msg);
+      } else {
+        console.error(msg);
       }
+      warned = true;
     }
+    return fn.apply(this, arguments);
   }
 
-  return res;
+  return deprecated;
 };
-Readable.prototype.addListener = Readable.prototype.on;
 
-// pause() and resume() are remnants of the legacy readable stream API
-// If the user uses them, then switch into old mode.
-Readable.prototype.resume = function() {
-  var state = this._readableState;
-  if (!state.flowing) {
-    debug('resume');
-    state.flowing = true;
-    if (!state.reading) {
-      debug('resume read 0');
-      this.read(0);
+
+var debugs = {};
+var debugEnviron;
+exports.debuglog = function(set) {
+  if (isUndefined(debugEnviron))
+    debugEnviron = process.env.NODE_DEBUG || '';
+  set = set.toUpperCase();
+  if (!debugs[set]) {
+    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
+      var pid = process.pid;
+      debugs[set] = function() {
+        var msg = exports.format.apply(exports, arguments);
+        console.error('%s %d: %s', set, pid, msg);
+      };
+    } else {
+      debugs[set] = function() {};
     }
-    resume(this, state);
   }
-  return this;
+  return debugs[set];
 };
 
-function resume(stream, state) {
-  if (!state.resumeScheduled) {
-    state.resumeScheduled = true;
-    process.nextTick(function() {
-      resume_(stream, state);
-    });
+
+/**
+ * Echos the value of a value. Trys to print the value out
+ * in the best way possible given the different types.
+ *
+ * @param {Object} obj The object to print out.
+ * @param {Object} opts Optional options object that alters the output.
+ */
+/* legacy: obj, showHidden, depth, colors*/
+function inspect(obj, opts) {
+  // default options
+  var ctx = {
+    seen: [],
+    stylize: stylizeNoColor
+  };
+  // legacy...
+  if (arguments.length >= 3) ctx.depth = arguments[2];
+  if (arguments.length >= 4) ctx.colors = arguments[3];
+  if (isBoolean(opts)) {
+    // legacy...
+    ctx.showHidden = opts;
+  } else if (opts) {
+    // got an "options" object
+    exports._extend(ctx, opts);
   }
+  // set default options
+  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
+  if (isUndefined(ctx.depth)) ctx.depth = 2;
+  if (isUndefined(ctx.colors)) ctx.colors = false;
+  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
+  if (ctx.colors) ctx.stylize = stylizeWithColor;
+  return formatValue(ctx, obj, ctx.depth);
 }
+exports.inspect = inspect;
 
-function resume_(stream, state) {
-  state.resumeScheduled = false;
-  stream.emit('resume');
-  flow(stream);
-  if (state.flowing && !state.reading)
-    stream.read(0);
-}
 
-Readable.prototype.pause = function() {
-  debug('call pause flowing=%j', this._readableState.flowing);
-  if (false !== this._readableState.flowing) {
-    debug('pause');
-    this._readableState.flowing = false;
-    this.emit('pause');
-  }
-  return this;
+// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
+inspect.colors = {
+  'bold' : [1, 22],
+  'italic' : [3, 23],
+  'underline' : [4, 24],
+  'inverse' : [7, 27],
+  'white' : [37, 39],
+  'grey' : [90, 39],
+  'black' : [30, 39],
+  'blue' : [34, 39],
+  'cyan' : [36, 39],
+  'green' : [32, 39],
+  'magenta' : [35, 39],
+  'red' : [31, 39],
+  'yellow' : [33, 39]
 };
 
-function flow(stream) {
-  var state = stream._readableState;
-  debug('flow', state.flowing);
-  if (state.flowing) {
-    do {
-      var chunk = stream.read();
-    } while (null !== chunk && state.flowing);
+// Don't use 'blue' not visible on cmd.exe
+inspect.styles = {
+  'special': 'cyan',
+  'number': 'yellow',
+  'boolean': 'yellow',
+  'undefined': 'grey',
+  'null': 'bold',
+  'string': 'green',
+  'date': 'magenta',
+  // "name": intentionally not styling
+  'regexp': 'red'
+};
+
+
+function stylizeWithColor(str, styleType) {
+  var style = inspect.styles[styleType];
+
+  if (style) {
+    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
+           '\u001b[' + inspect.colors[style][1] + 'm';
+  } else {
+    return str;
   }
 }
 
-// wrap an old-style stream as the async data source.
-// This is *not* part of the readable stream interface.
-// It is an ugly unfortunate mess of history.
-Readable.prototype.wrap = function(stream) {
-  var state = this._readableState;
-  var paused = false;
 
-  var self = this;
-  stream.on('end', function() {
-    debug('wrapped end');
-    if (state.decoder && !state.ended) {
-      var chunk = state.decoder.end();
-      if (chunk && chunk.length)
-        self.push(chunk);
-    }
+function stylizeNoColor(str, styleType) {
+  return str;
+}
 
-    self.push(null);
-  });
 
-  stream.on('data', function(chunk) {
-    debug('wrapped data');
-    if (state.decoder)
-      chunk = state.decoder.write(chunk);
-    if (!chunk || !state.objectMode && !chunk.length)
-      return;
+function arrayToHash(array) {
+  var hash = {};
 
-    var ret = self.push(chunk);
-    if (!ret) {
-      paused = true;
-      stream.pause();
-    }
+  array.forEach(function(val, idx) {
+    hash[val] = true;
   });
 
-  // proxy all the other methods.
-  // important when wrapping filters and duplexes.
-  for (var i in stream) {
-    if (util.isFunction(stream[i]) && util.isUndefined(this[i])) {
-      this[i] = function(method) { return function() {
-        return stream[method].apply(stream, arguments);
-      }}(i);
-    }
-  }
+  return hash;
+}
 
-  // proxy certain important events.
-  var events = ['error', 'close', 'destroy', 'pause', 'resume'];
-  forEach(events, function(ev) {
-    stream.on(ev, self.emit.bind(self, ev));
-  });
 
-  // when we try to consume some more bytes, simply unpause the
-  // underlying stream.
-  self._read = function(n) {
-    debug('wrapped _read', n);
-    if (paused) {
-      paused = false;
-      stream.resume();
+function formatValue(ctx, value, recurseTimes) {
+  // Provide a hook for user-specified inspect functions.
+  // Check that value is an object with an inspect function on it
+  if (ctx.customInspect &&
+      value &&
+      isFunction(value.inspect) &&
+      // Filter out the util module, it's inspect function is special
+      value.inspect !== exports.inspect &&
+      // Also filter out any prototype objects using the circular check.
+      !(value.constructor && value.constructor.prototype === value)) {
+    var ret = value.inspect(recurseTimes, ctx);
+    if (!isString(ret)) {
+      ret = formatValue(ctx, ret, recurseTimes);
     }
-  };
-
-  return self;
-};
-
+    return ret;
+  }
 
+  // Primitive types cannot have properties
+  var primitive = formatPrimitive(ctx, value);
+  if (primitive) {
+    return primitive;
+  }
 
-// exposed for testing purposes only.
-Readable._fromList = fromList;
+  // Look up the keys of the object.
+  var keys = Object.keys(value);
+  var visibleKeys = arrayToHash(keys);
 
-// Pluck off n bytes from an array of buffers.
-// Length is the combined lengths of all the buffers in the list.
-function fromList(n, state) {
-  var list = state.buffer;
-  var length = state.length;
-  var stringMode = !!state.decoder;
-  var objectMode = !!state.objectMode;
-  var ret;
+  if (ctx.showHidden) {
+    keys = Object.getOwnPropertyNames(value);
+  }
 
-  // nothing in the list, definitely empty.
-  if (list.length === 0)
-    return null;
+  // IE doesn't make error fields non-enumerable
+  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
+  if (isError(value)
+      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
+    return formatError(value);
+  }
 
-  if (length === 0)
-    ret = null;
-  else if (objectMode)
-    ret = list.shift();
-  else if (!n || n >= length) {
-    // read it all, truncate the array.
-    if (stringMode)
-      ret = list.join('');
-    else
-      ret = Buffer.concat(list, length);
-    list.length = 0;
-  } else {
-    // read just some of it.
-    if (n < list[0].length) {
-      // just take a part of the first list item.
-      // slice is the same for buffers and strings.
-      var buf = list[0];
-      ret = buf.slice(0, n);
-      list[0] = buf.slice(n);
-    } else if (n === list[0].length) {
-      // first list is a perfect match
-      ret = list.shift();
-    } else {
-      // complex case.
-      // we have enough to cover it, but it spans past the first buffer.
-      if (stringMode)
-        ret = '';
-      else
-        ret = new Buffer(n);
+  // Some type of object without properties can be shortcutted.
+  if (keys.length === 0) {
+    if (isFunction(value)) {
+      var name = value.name ? ': ' + value.name : '';
+      return ctx.stylize('[Function' + name + ']', 'special');
+    }
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    }
+    if (isDate(value)) {
+      return ctx.stylize(Date.prototype.toString.call(value), 'date');
+    }
+    if (isError(value)) {
+      return formatError(value);
+    }
+  }
 
-      var c = 0;
-      for (var i = 0, l = list.length; i < l && c < n; i++) {
-        var buf = list[0];
-        var cpy = Math.min(n - c, buf.length);
+  var base = '', array = false, braces = ['{', '}'];
 
-        if (stringMode)
-          ret += buf.slice(0, cpy);
-        else
-          buf.copy(ret, c, 0, cpy);
+  // Make Array say that they are Array
+  if (isArray(value)) {
+    array = true;
+    braces = ['[', ']'];
+  }
 
-        if (cpy < buf.length)
-          list[0] = buf.slice(cpy);
-        else
-          list.shift();
+  // Make functions say that they are functions
+  if (isFunction(value)) {
+    var n = value.name ? ': ' + value.name : '';
+    base = ' [Function' + n + ']';
+  }
 
-        c += cpy;
-      }
-    }
+  // Make RegExps say that they are RegExps
+  if (isRegExp(value)) {
+    base = ' ' + RegExp.prototype.toString.call(value);
   }
 
-  return ret;
-}
+  // Make dates with properties first say the date
+  if (isDate(value)) {
+    base = ' ' + Date.prototype.toUTCString.call(value);
+  }
 
-function endReadable(stream) {
-  var state = stream._readableState;
+  // Make error with message first say the error
+  if (isError(value)) {
+    base = ' ' + formatError(value);
+  }
 
-  // If we get here before consuming all the bytes, then that is a
-  // bug in node.  Should never happen.
-  if (state.length > 0)
-    throw new Error('endReadable called on non-empty stream');
+  if (keys.length === 0 && (!array || value.length == 0)) {
+    return braces[0] + base + braces[1];
+  }
 
-  if (!state.endEmitted) {
-    state.ended = true;
-    process.nextTick(function() {
-      // Check that we didn't get one last unshift.
-      if (!state.endEmitted && state.length === 0) {
-        state.endEmitted = true;
-        stream.readable = false;
-        stream.emit('end');
-      }
+  if (recurseTimes < 0) {
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    } else {
+      return ctx.stylize('[Object]', 'special');
+    }
+  }
+
+  ctx.seen.push(value);
+
+  var output;
+  if (array) {
+    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
+  } else {
+    output = keys.map(function(key) {
+      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
     });
   }
+
+  ctx.seen.pop();
+
+  return reduceToSingleString(output, base, braces);
 }
 
-function forEach (xs, f) {
-  for (var i = 0, l = xs.length; i < l; i++) {
-    f(xs[i], i);
+
+function formatPrimitive(ctx, value) {
+  if (isUndefined(value))
+    return ctx.stylize('undefined', 'undefined');
+  if (isString(value)) {
+    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
+                                             .replace(/'/g, "\\'")
+                                             .replace(/\\"/g, '"') + '\'';
+    return ctx.stylize(simple, 'string');
   }
+  if (isNumber(value))
+    return ctx.stylize('' + value, 'number');
+  if (isBoolean(value))
+    return ctx.stylize('' + value, 'boolean');
+  // For some reason typeof null is "object", so special case here.
+  if (isNull(value))
+    return ctx.stylize('null', 'null');
 }
 
-function indexOf (xs, x) {
-  for (var i = 0, l = xs.length; i < l; i++) {
-    if (xs[i] === x) return i;
+
+function formatError(value) {
+  return '[' + Error.prototype.toString.call(value) + ']';
+}
+
+
+function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
+  var output = [];
+  for (var i = 0, l = value.length; i < l; ++i) {
+    if (hasOwnProperty(value, String(i))) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          String(i), true));
+    } else {
+      output.push('');
+    }
   }
-  return -1;
+  keys.forEach(function(key) {
+    if (!key.match(/^\d+$/)) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          key, true));
+    }
+  });
+  return output;
 }
 
-}).call(this,require('_process'))
-},{"./_stream_duplex":16,"_process":14,"buffer":7,"core-util-is":21,"events":11,"inherits":12,"isarray":13,"stream":26,"string_decoder/":27,"util":6}],19:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
+  var name, str, desc;
+  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
+  if (desc.get) {
+    if (desc.set) {
+      str = ctx.stylize('[Getter/Setter]', 'special');
+    } else {
+      str = ctx.stylize('[Getter]', 'special');
+    }
+  } else {
+    if (desc.set) {
+      str = ctx.stylize('[Setter]', 'special');
+    }
+  }
+  if (!hasOwnProperty(visibleKeys, key)) {
+    name = '[' + key + ']';
+  }
+  if (!str) {
+    if (ctx.seen.indexOf(desc.value) < 0) {
+      if (isNull(recurseTimes)) {
+        str = formatValue(ctx, desc.value, null);
+      } else {
+        str = formatValue(ctx, desc.value, recurseTimes - 1);
+      }
+      if (str.indexOf('\n') > -1) {
+        if (array) {
+          str = str.split('\n').map(function(line) {
+            return '  ' + line;
+          }).join('\n').substr(2);
+        } else {
+          str = '\n' + str.split('\n').map(function(line) {
+            return '   ' + line;
+          }).join('\n');
+        }
+      }
+    } else {
+      str = ctx.stylize('[Circular]', 'special');
+    }
+  }
+  if (isUndefined(name)) {
+    if (array && key.match(/^\d+$/)) {
+      return str;
+    }
+    name = JSON.stringify('' + key);
+    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
+      name = name.substr(1, name.length - 2);
+      name = ctx.stylize(name, 'name');
+    } else {
+      name = name.replace(/'/g, "\\'")
+                 .replace(/\\"/g, '"')
+                 .replace(/(^"|"$)/g, "'");
+      name = ctx.stylize(name, 'string');
+    }
+  }
+
+  return name + ': ' + str;
+}
 
-// a transform stream is a readable/writable stream where you do
-// something with the data.  Sometimes it's called a "filter",
-// but that's not a great name for it, since that implies a thing where
-// some bits pass through, and others are simply ignored.  (That would
-// be a valid example of a transform, of course.)
-//
-// While the output is causally related to the input, it's not a
-// necessarily symmetric or synchronous transformation.  For example,
-// a zlib stream might take multiple plain-text writes(), and then
-// emit a single compressed chunk some time in the future.
-//
-// Here's how this works:
-//
-// The Transform stream has all the aspects of the readable and writable
-// stream classes.  When you write(chunk), that calls _write(chunk,cb)
-// internally, and returns false if there's a lot of pending writes
-// buffered up.  When you call read(), that calls _read(n) until
-// there's enough pending readable data buffered up.
-//
-// In a transform stream, the written data is placed in a buffer.  When
-// _read(n) is called, it transforms the queued up data, calling the
-// buffered _write cb's as it consumes chunks.  If consuming a single
-// written chunk would result in multiple output chunks, then the first
-// outputted bit calls the readcb, and subsequent chunks just go into
-// the read buffer, and will cause it to emit 'readable' if necessary.
-//
-// This way, back-pressure is actually determined by the reading side,
-// since _read has to be called to start processing a new chunk.  However,
-// a pathological inflate type of transform can cause excessive buffering
-// here.  For example, imagine a stream where every byte of input is
-// interpreted as an integer from 0-255, and then results in that many
-// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
-// 1kb of data being output.  In this case, you could write a very small
-// amount of input, and end up with a very large amount of output.  In
-// such a pathological inflating mechanism, there'd be no way to tell
-// the system to stop doing the transform.  A single 4MB write could
-// cause the system to run out of memory.
-//
-// However, even in such a pathological case, only a single written chunk
-// would be consumed, and then the rest would wait (un-transformed) until
-// the results of the previous transformed chunk were consumed.
 
-module.exports = Transform;
+function reduceToSingleString(output, base, braces) {
+  var numLinesEst = 0;
+  var length = output.reduce(function(prev, cur) {
+    numLinesEst++;
+    if (cur.indexOf('\n') >= 0) numLinesEst++;
+    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
+  }, 0);
 
-var Duplex = require('./_stream_duplex');
+  if (length > 60) {
+    return braces[0] +
+           (base === '' ? '' : base + '\n ') +
+           ' ' +
+           output.join(',\n  ') +
+           ' ' +
+           braces[1];
+  }
 
-/*<replacement>*/
-var util = require('core-util-is');
-util.inherits = require('inherits');
-/*</replacement>*/
+  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
+}
 
-util.inherits(Transform, Duplex);
 
+// NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+function isArray(ar) {
+  return Array.isArray(ar);
+}
+exports.isArray = isArray;
 
-function TransformState(options, stream) {
-  this.afterTransform = function(er, data) {
-    return afterTransform(stream, er, data);
-  };
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+exports.isBoolean = isBoolean;
 
-  this.needTransform = false;
-  this.transforming = false;
-  this.writecb = null;
-  this.writechunk = null;
+function isNull(arg) {
+  return arg === null;
 }
+exports.isNull = isNull;
 
-function afterTransform(stream, er, data) {
-  var ts = stream._transformState;
-  ts.transforming = false;
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+exports.isNullOrUndefined = isNullOrUndefined;
 
-  var cb = ts.writecb;
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+exports.isNumber = isNumber;
 
-  if (!cb)
-    return stream.emit('error', new Error('no writecb in Transform class'));
+function isString(arg) {
+  return typeof arg === 'string';
+}
+exports.isString = isString;
 
-  ts.writechunk = null;
-  ts.writecb = null;
+function isSymbol(arg) {
+  return typeof arg === 'symbol';
+}
+exports.isSymbol = isSymbol;
 
-  if (!util.isNullOrUndefined(data))
-    stream.push(data);
+function isUndefined(arg) {
+  return arg === void 0;
+}
+exports.isUndefined = isUndefined;
 
-  if (cb)
-    cb(er);
+function isRegExp(re) {
+  return isObject(re) && objectToString(re) === '[object RegExp]';
+}
+exports.isRegExp = isRegExp;
 
-  var rs = stream._readableState;
-  rs.reading = false;
-  if (rs.needReadable || rs.length < rs.highWaterMark) {
-    stream._read(rs.highWaterMark);
-  }
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
 }
+exports.isObject = isObject;
 
+function isDate(d) {
+  return isObject(d) && objectToString(d) === '[object Date]';
+}
+exports.isDate = isDate;
 
-function Transform(options) {
-  if (!(this instanceof Transform))
-    return new Transform(options);
+function isError(e) {
+  return isObject(e) &&
+      (objectToString(e) === '[object Error]' || e instanceof Error);
+}
+exports.isError = isError;
 
-  Duplex.call(this, options);
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+exports.isFunction = isFunction;
 
-  this._transformState = new TransformState(options, this);
+function isPrimitive(arg) {
+  return arg === null ||
+         typeof arg === 'boolean' ||
+         typeof arg === 'number' ||
+         typeof arg === 'string' ||
+         typeof arg === 'symbol' ||  // ES6 symbol
+         typeof arg === 'undefined';
+}
+exports.isPrimitive = isPrimitive;
 
-  // when the writable side finishes, then flush out anything remaining.
-  var stream = this;
+exports.isBuffer = require('./support/isBuffer');
 
-  // start out asking for a readable event once data is transformed.
-  this._readableState.needReadable = true;
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
 
-  // we have implemented the _read method, and done the other things
-  // that Readable wants before the first _read call, so unset the
-  // sync guard flag.
-  this._readableState.sync = false;
 
-  this.once('prefinish', function() {
-    if (util.isFunction(this._flush))
-      this._flush(function(er) {
-        done(stream, er);
-      });
-    else
-      done(stream);
-  });
+function pad(n) {
+  return n < 10 ? '0' + n.toString(10) : n.toString(10);
 }
 
-Transform.prototype.push = function(chunk, encoding) {
-  this._transformState.needTransform = false;
-  return Duplex.prototype.push.call(this, chunk, encoding);
-};
 
-// This is the part where you do stuff!
-// override this function in implementation classes.
-// 'chunk' is an input chunk.
-//
-// Call `push(newChunk)` to pass along transformed output
-// to the readable side.  You may call 'push' zero or more times.
-//
-// Call `cb(err)` when you are done with this chunk.  If you pass
-// an error, then that'll put the hurt on the whole operation.  If you
-// never call cb(), then you'll never get another chunk.
-Transform.prototype._transform = function(chunk, encoding, cb) {
-  throw new Error('not implemented');
-};
+var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
+              'Oct', 'Nov', 'Dec'];
 
-Transform.prototype._write = function(chunk, encoding, cb) {
-  var ts = this._transformState;
-  ts.writecb = cb;
-  ts.writechunk = chunk;
-  ts.writeencoding = encoding;
-  if (!ts.transforming) {
-    var rs = this._readableState;
-    if (ts.needTransform ||
-        rs.needReadable ||
-        rs.length < rs.highWaterMark)
-      this._read(rs.highWaterMark);
-  }
-};
+// 26 Feb 16:19:34
+function timestamp() {
+  var d = new Date();
+  var time = [pad(d.getHours()),
+              pad(d.getMinutes()),
+              pad(d.getSeconds())].join(':');
+  return [d.getDate(), months[d.getMonth()], time].join(' ');
+}
 
-// Doesn't matter what the args are here.
-// _transform does all the work.
-// That we got here means that the readable side wants more data.
-Transform.prototype._read = function(n) {
-  var ts = this._transformState;
 
-  if (!util.isNull(ts.writechunk) && ts.writecb && !ts.transforming) {
-    ts.transforming = true;
-    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
-  } else {
-    // mark that we need a transform, so that any data that comes in
-    // will get processed, now that we've asked for it.
-    ts.needTransform = true;
-  }
+// log is just a thin wrapper to console.log that prepends a timestamp
+exports.log = function() {
+  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
 };
 
 
-function done(stream, er) {
-  if (er)
-    return stream.emit('error', er);
-
-  // if there's nothing in the write buffer, then that means
-  // that nothing more will ever be provided
-  var ws = stream._writableState;
-  var ts = stream._transformState;
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * The Function.prototype.inherits from lang.js rewritten as a standalone
+ * function (not on Function.prototype). NOTE: If this file is to be loaded
+ * during bootstrapping this function needs to be rewritten using some native
+ * functions as prototype setup using normal JavaScript does not work as
+ * expected during bootstrapping (see mirror.js in r114903).
+ *
+ * @param {function} ctor Constructor function which needs to inherit the
+ *     prototype.
+ * @param {function} superCtor Constructor function to inherit prototype from.
+ */
+exports.inherits = require('inherits');
 
-  if (ws.length)
-    throw new Error('calling transform done when ws.length != 0');
+exports._extend = function(origin, add) {
+  // Don't do anything if add isn't an object
+  if (!add || !isObject(add)) return origin;
 
-  if (ts.transforming)
-    throw new Error('calling transform done when still transforming');
+  var keys = Object.keys(add);
+  var i = keys.length;
+  while (i--) {
+    origin[keys[i]] = add[keys[i]];
+  }
+  return origin;
+};
 
-  return stream.push(null);
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
 }
 
-},{"./_stream_duplex":16,"core-util-is":21,"inherits":12}],20:[function(require,module,exports){
-(function (process){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./support/isBuffer":29,"_process":13,"inherits":28}],31:[function(require,module,exports){
+(function (Buffer){
+const createKeccakHash = require('keccak')
+const secp256k1 = require('secp256k1')
+const assert = require('assert')
+const rlp = require('rlp')
+const BN = require('bn.js')
+const createHash = require('create-hash')
+Object.assign(exports, require('ethjs-util'))
 
-// A bit simpler than readable streams.
-// Implement an async ._write(chunk, cb), and it'll handle all
-// the drain event emission and buffering.
+/**
+ * the max integer that this VM can handle (a ```BN```)
+ * @var {BN} MAX_INTEGER
+ */
+exports.MAX_INTEGER = new BN('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)
 
-module.exports = Writable;
+/**
+ * 2^256 (a ```BN```)
+ * @var {BN} TWO_POW256
+ */
+exports.TWO_POW256 = new BN('10000000000000000000000000000000000000000000000000000000000000000', 16)
 
-/*<replacement>*/
-var Buffer = require('buffer').Buffer;
-/*</replacement>*/
+/**
+ * SHA3-256 hash of null (a ```String```)
+ * @var {String} SHA3_NULL_S
+ */
+exports.SHA3_NULL_S = 'c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'
 
-Writable.WritableState = WritableState;
+/**
+ * SHA3-256 hash of null (a ```Buffer```)
+ * @var {Buffer} SHA3_NULL
+ */
+exports.SHA3_NULL = Buffer.from(exports.SHA3_NULL_S, 'hex')
 
+/**
+ * SHA3-256 of an RLP of an empty array (a ```String```)
+ * @var {String} SHA3_RLP_ARRAY_S
+ */
+exports.SHA3_RLP_ARRAY_S = '1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347'
 
-/*<replacement>*/
-var util = require('core-util-is');
-util.inherits = require('inherits');
-/*</replacement>*/
+/**
+ * SHA3-256 of an RLP of an empty array (a ```Buffer```)
+ * @var {Buffer} SHA3_RLP_ARRAY
+ */
+exports.SHA3_RLP_ARRAY = Buffer.from(exports.SHA3_RLP_ARRAY_S, 'hex')
 
-var Stream = require('stream');
+/**
+ * SHA3-256 hash of the RLP of null  (a ```String```)
+ * @var {String} SHA3_RLP_S
+ */
+exports.SHA3_RLP_S = '56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421'
 
-util.inherits(Writable, Stream);
+/**
+ * SHA3-256 hash of the RLP of null (a ```Buffer```)
+ * @var {Buffer} SHA3_RLP
+ */
+exports.SHA3_RLP = Buffer.from(exports.SHA3_RLP_S, 'hex')
 
-function WriteReq(chunk, encoding, cb) {
-  this.chunk = chunk;
-  this.encoding = encoding;
-  this.callback = cb;
-}
+/**
+ * [`BN`](https://github.com/indutny/bn.js)
+ * @var {Function}
+ */
+exports.BN = BN
 
-function WritableState(options, stream) {
-  var Duplex = require('./_stream_duplex');
+/**
+ * [`rlp`](https://github.com/ethereumjs/rlp)
+ * @var {Function}
+ */
+exports.rlp = rlp
 
-  options = options || {};
+/**
+ * [`secp256k1`](https://github.com/cryptocoinjs/secp256k1-node/)
+ * @var {Object}
+ */
+exports.secp256k1 = secp256k1
 
-  // the point at which write() starts returning false
-  // Note: 0 is a valid value, means that we always return false if
-  // the entire buffer is not flushed immediately on write()
-  var hwm = options.highWaterMark;
-  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
-  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
+/**
+ * Returns a buffer filled with 0s
+ * @method zeros
+ * @param {Number} bytes  the number of bytes the buffer should be
+ * @return {Buffer}
+ */
+exports.zeros = function (bytes) {
+  return Buffer.allocUnsafe(bytes).fill(0)
+}
 
-  // object stream flag to indicate whether or not this stream
-  // contains buffers or objects.
-  this.objectMode = !!options.objectMode;
+/**
+ * Left Pads an `Array` or `Buffer` with leading zeros till it has `length` bytes.
+ * Or it truncates the beginning if it exceeds.
+ * @method lsetLength
+ * @param {Buffer|Array} msg the value to pad
+ * @param {Number} length the number of bytes the output should be
+ * @param {Boolean} [right=false] whether to start padding form the left or right
+ * @return {Buffer|Array}
+ */
+exports.setLengthLeft = exports.setLength = function (msg, length, right) {
+  var buf = exports.zeros(length)
+  msg = exports.toBuffer(msg)
+  if (right) {
+    if (msg.length < length) {
+      msg.copy(buf)
+      return buf
+    }
+    return msg.slice(0, length)
+  } else {
+    if (msg.length < length) {
+      msg.copy(buf, length - msg.length)
+      return buf
+    }
+    return msg.slice(-length)
+  }
+}
 
-  if (stream instanceof Duplex)
-    this.objectMode = this.objectMode || !!options.writableObjectMode;
+/**
+ * Right Pads an `Array` or `Buffer` with leading zeros till it has `length` bytes.
+ * Or it truncates the beginning if it exceeds.
+ * @param {Buffer|Array} msg the value to pad
+ * @param {Number} length the number of bytes the output should be
+ * @return {Buffer|Array}
+ */
+exports.setLengthRight = function (msg, length) {
+  return exports.setLength(msg, length, true)
+}
 
-  // cast to ints.
-  this.highWaterMark = ~~this.highWaterMark;
+/**
+ * Trims leading zeros from a `Buffer` or an `Array`
+ * @param {Buffer|Array|String} a
+ * @return {Buffer|Array|String}
+ */
+exports.unpad = exports.stripZeros = function (a) {
+  a = exports.stripHexPrefix(a)
+  var first = a[0]
+  while (a.length > 0 && first.toString() === '0') {
+    a = a.slice(1)
+    first = a[0]
+  }
+  return a
+}
+/**
+ * Attempts to turn a value into a `Buffer`. As input it supports `Buffer`, `String`, `Number`, null/undefined, `BN` and other objects with a `toArray()` method.
+ * @param {*} v the value
+ */
+exports.toBuffer = function (v) {
+  if (!Buffer.isBuffer(v)) {
+    if (Array.isArray(v)) {
+      v = Buffer.from(v)
+    } else if (typeof v === 'string') {
+      if (exports.isHexPrefixed(v)) {
+        v = Buffer.from(exports.padToEven(exports.stripHexPrefix(v)), 'hex')
+      } else {
+        v = Buffer.from(v)
+      }
+    } else if (typeof v === 'number') {
+      v = exports.intToBuffer(v)
+    } else if (v === null || v === undefined) {
+      v = Buffer.allocUnsafe(0)
+    } else if (v.toArray) {
+      // converts a BN to a Buffer
+      v = Buffer.from(v.toArray())
+    } else {
+      throw new Error('invalid type')
+    }
+  }
+  return v
+}
 
-  this.needDrain = false;
-  // at the start of calling end()
-  this.ending = false;
-  // when end() has been called, and returned
-  this.ended = false;
-  // when 'finish' is emitted
-  this.finished = false;
+/**
+ * Converts a `Buffer` to a `Number`
+ * @param {Buffer} buf
+ * @return {Number}
+ * @throws If the input number exceeds 53 bits.
+ */
+exports.bufferToInt = function (buf) {
+  return new BN(exports.toBuffer(buf)).toNumber()
+}
 
-  // should we decode strings into buffers before passing to _write?
-  // this is here so that some node-core streams can optimize string
-  // handling at a lower level.
-  var noDecode = options.decodeStrings === false;
-  this.decodeStrings = !noDecode;
+/**
+ * Converts a `Buffer` into a hex `String`
+ * @param {Buffer} buf
+ * @return {String}
+ */
+exports.bufferToHex = function (buf) {
+  buf = exports.toBuffer(buf)
+  return '0x' + buf.toString('hex')
+}
 
-  // Crypto is kind of old and crusty.  Historically, its default string
-  // encoding is 'binary' so we have to make this configurable.
-  // Everything else in the universe uses 'utf8', though.
-  this.defaultEncoding = options.defaultEncoding || 'utf8';
+/**
+ * Interprets a `Buffer` as a signed integer and returns a `BN`. Assumes 256-bit numbers.
+ * @param {Buffer} num
+ * @return {BN}
+ */
+exports.fromSigned = function (num) {
+  return new BN(num).fromTwos(256)
+}
 
-  // not an actual buffer we keep track of, but a measurement
-  // of how much we're waiting to get pushed to some underlying
-  // socket or file.
-  this.length = 0;
+/**
+ * Converts a `BN` to an unsigned integer and returns it as a `Buffer`. Assumes 256-bit numbers.
+ * @param {BN} num
+ * @return {Buffer}
+ */
+exports.toUnsigned = function (num) {
+  return Buffer.from(num.toTwos(256).toArray())
+}
 
-  // a flag to see when we're in the middle of a write.
-  this.writing = false;
+/**
+ * Creates SHA-3 hash of the input
+ * @param {Buffer|Array|String|Number} a the input data
+ * @param {Number} [bits=256] the SHA width
+ * @return {Buffer}
+ */
+exports.sha3 = function (a, bits) {
+  a = exports.toBuffer(a)
+  if (!bits) bits = 256
 
-  // when true all writes will be buffered until .uncork() call
-  this.corked = 0;
+  return createKeccakHash('keccak' + bits).update(a).digest()
+}
 
-  // a flag to be able to tell if the onwrite cb is called immediately,
-  // or on a later tick.  We set this to true at first, because any
-  // actions that shouldn't happen until "later" should generally also
-  // not happen before the first write call.
-  this.sync = true;
+/**
+ * Creates SHA256 hash of the input
+ * @param {Buffer|Array|String|Number} a the input data
+ * @return {Buffer}
+ */
+exports.sha256 = function (a) {
+  a = exports.toBuffer(a)
+  return createHash('sha256').update(a).digest()
+}
 
-  // a flag to know if we're processing previously buffered items, which
-  // may call the _write() callback in the same tick, so that we don't
-  // end up in an overlapped onwrite situation.
-  this.bufferProcessing = false;
+/**
+ * Creates RIPEMD160 hash of the input
+ * @param {Buffer|Array|String|Number} a the input data
+ * @param {Boolean} padded whether it should be padded to 256 bits or not
+ * @return {Buffer}
+ */
+exports.ripemd160 = function (a, padded) {
+  a = exports.toBuffer(a)
+  var hash = createHash('rmd160').update(a).digest()
+  if (padded === true) {
+    return exports.setLength(hash, 32)
+  } else {
+    return hash
+  }
+}
 
-  // the callback that's passed to _write(chunk,cb)
-  this.onwrite = function(er) {
-    onwrite(stream, er);
-  };
+/**
+ * Creates SHA-3 hash of the RLP encoded version of the input
+ * @param {Buffer|Array|String|Number} a the input data
+ * @return {Buffer}
+ */
+exports.rlphash = function (a) {
+  return exports.sha3(rlp.encode(a))
+}
 
-  // the callback that the user supplies to write(chunk,encoding,cb)
-  this.writecb = null;
+/**
+ * Checks if the private key satisfies the rules of the curve secp256k1.
+ * @param {Buffer} privateKey
+ * @return {Boolean}
+ */
+exports.isValidPrivate = function (privateKey) {
+  return secp256k1.privateKeyVerify(privateKey)
+}
 
-  // the amount that is being written when _write is called.
-  this.writelen = 0;
+/**
+ * Checks if the public key satisfies the rules of the curve secp256k1
+ * and the requirements of Ethereum.
+ * @param {Buffer} publicKey The two points of an uncompressed key, unless sanitize is enabled
+ * @param {Boolean} [sanitize=false] Accept public keys in other formats
+ * @return {Boolean}
+ */
+exports.isValidPublic = function (publicKey, sanitize) {
+  if (publicKey.length === 64) {
+    // Convert to SEC1 for secp256k1
+    return secp256k1.publicKeyVerify(Buffer.concat([ Buffer.from([4]), publicKey ]))
+  }
 
-  this.buffer = [];
+  if (!sanitize) {
+    return false
+  }
 
-  // number of pending user-supplied write callbacks
-  // this must be 0 before 'finish' can be emitted
-  this.pendingcb = 0;
+  return secp256k1.publicKeyVerify(publicKey)
+}
 
-  // emit prefinish if the only thing we're waiting for is _write cbs
-  // This is relevant for synchronous Transform streams
-  this.prefinished = false;
+/**
+ * Returns the ethereum address of a given public key.
+ * Accepts "Ethereum public keys" and SEC1 encoded keys.
+ * @param {Buffer} pubKey The two points of an uncompressed key, unless sanitize is enabled
+ * @param {Boolean} [sanitize=false] Accept public keys in other formats
+ * @return {Buffer}
+ */
+exports.pubToAddress = exports.publicToAddress = function (pubKey, sanitize) {
+  pubKey = exports.toBuffer(pubKey)
+  if (sanitize && (pubKey.length !== 64)) {
+    pubKey = secp256k1.publicKeyConvert(pubKey, false).slice(1)
+  }
+  assert(pubKey.length === 64)
+  // Only take the lower 160bits of the hash
+  return exports.sha3(pubKey).slice(-20)
+}
 
-  // True if the error was already emitted and should not be thrown again
-  this.errorEmitted = false;
+/**
+ * Returns the ethereum public key of a given private key
+ * @param {Buffer} privateKey A private key must be 256 bits wide
+ * @return {Buffer}
+ */
+var privateToPublic = exports.privateToPublic = function (privateKey) {
+  privateKey = exports.toBuffer(privateKey)
+  // skip the type flag and use the X, Y points
+  return secp256k1.publicKeyCreate(privateKey, false).slice(1)
 }
 
-function Writable(options) {
-  var Duplex = require('./_stream_duplex');
+/**
+ * Converts a public key to the Ethereum format.
+ * @param {Buffer} publicKey
+ * @return {Buffer}
+ */
+exports.importPublic = function (publicKey) {
+  publicKey = exports.toBuffer(publicKey)
+  if (publicKey.length !== 64) {
+    publicKey = secp256k1.publicKeyConvert(publicKey, false).slice(1)
+  }
+  return publicKey
+}
 
-  // Writable ctor is applied to Duplexes, though they're not
-  // instanceof Writable, they're instanceof Readable.
-  if (!(this instanceof Writable) && !(this instanceof Duplex))
-    return new Writable(options);
+/**
+ * ECDSA sign
+ * @param {Buffer} msgHash
+ * @param {Buffer} privateKey
+ * @return {Object}
+ */
+exports.ecsign = function (msgHash, privateKey) {
+  var sig = secp256k1.sign(msgHash, privateKey)
 
-  this._writableState = new WritableState(options, this);
+  var ret = {}
+  ret.r = sig.signature.slice(0, 32)
+  ret.s = sig.signature.slice(32, 64)
+  ret.v = sig.recovery + 27
+  return ret
+}
 
-  // legacy.
-  this.writable = true;
+/**
+ * Returns the keccak-256 hash of `message`, prefixed with the header used by the `eth_sign` RPC call.
+ * The output of this function can be fed into `ecsign` to produce the same signature as the `eth_sign`
+ * call for a given `message`, or fed to `ecrecover` along with a signature to recover the public key
+ * used to produce the signature.
+ * @param message
+ * @returns {Buffer} hash
+ */
+exports.hashPersonalMessage = function (message) {
+  var prefix = exports.toBuffer('\u0019Ethereum Signed Message:\n' + message.length.toString())
+  return exports.sha3(Buffer.concat([prefix, message]))
+}
 
-  Stream.call(this);
+/**
+ * ECDSA public key recovery from signature
+ * @param {Buffer} msgHash
+ * @param {Number} v
+ * @param {Buffer} r
+ * @param {Buffer} s
+ * @return {Buffer} publicKey
+ */
+exports.ecrecover = function (msgHash, v, r, s) {
+  var signature = Buffer.concat([exports.setLength(r, 32), exports.setLength(s, 32)], 64)
+  var recovery = v - 27
+  if (recovery !== 0 && recovery !== 1) {
+    throw new Error('Invalid signature v value')
+  }
+  var senderPubKey = secp256k1.recover(msgHash, signature, recovery)
+  return secp256k1.publicKeyConvert(senderPubKey, false).slice(1)
 }
 
-// Otherwise people can pipe Writable streams, which is just wrong.
-Writable.prototype.pipe = function() {
-  this.emit('error', new Error('Cannot pipe. Not readable.'));
-};
+/**
+ * Convert signature parameters into the format of `eth_sign` RPC method
+ * @param {Number} v
+ * @param {Buffer} r
+ * @param {Buffer} s
+ * @return {String} sig
+ */
+exports.toRpcSig = function (v, r, s) {
+  // NOTE: with potential introduction of chainId this might need to be updated
+  if (v !== 27 && v !== 28) {
+    throw new Error('Invalid recovery id')
+  }
+
+  // geth (and the RPC eth_sign method) uses the 65 byte format used by Bitcoin
+  // FIXME: this might change in the future - https://github.com/ethereum/go-ethereum/issues/2053
+  return exports.bufferToHex(Buffer.concat([
+    exports.setLengthLeft(r, 32),
+    exports.setLengthLeft(s, 32),
+    exports.toBuffer(v - 27)
+  ]))
+}
+
+/**
+ * Convert signature format of the `eth_sign` RPC method to signature parameters
+ * NOTE: all because of a bug in geth: https://github.com/ethereum/go-ethereum/issues/2053
+ * @param {String} sig
+ * @return {Object}
+ */
+exports.fromRpcSig = function (sig) {
+  sig = exports.toBuffer(sig)
 
+  // NOTE: with potential introduction of chainId this might need to be updated
+  if (sig.length !== 65) {
+    throw new Error('Invalid signature length')
+  }
 
-function writeAfterEnd(stream, state, cb) {
-  var er = new Error('write after end');
-  // TODO: defer error events consistently everywhere, not just the cb
-  stream.emit('error', er);
-  process.nextTick(function() {
-    cb(er);
-  });
-}
+  var v = sig[64]
+  // support both versions of `eth_sign` responses
+  if (v < 27) {
+    v += 27
+  }
 
-// If we get something that is not a buffer, string, null, or undefined,
-// and we're not in objectMode, then that's an error.
-// Otherwise stream chunks are all considered to be of length=1, and the
-// watermarks determine how many objects to keep in the buffer, rather than
-// how many bytes or characters.
-function validChunk(stream, state, chunk, cb) {
-  var valid = true;
-  if (!util.isBuffer(chunk) &&
-      !util.isString(chunk) &&
-      !util.isNullOrUndefined(chunk) &&
-      !state.objectMode) {
-    var er = new TypeError('Invalid non-string/buffer chunk');
-    stream.emit('error', er);
-    process.nextTick(function() {
-      cb(er);
-    });
-    valid = false;
+  return {
+    v: v,
+    r: sig.slice(0, 32),
+    s: sig.slice(32, 64)
   }
-  return valid;
 }
 
-Writable.prototype.write = function(chunk, encoding, cb) {
-  var state = this._writableState;
-  var ret = false;
+/**
+ * Returns the ethereum address of a given private key
+ * @param {Buffer} privateKey A private key must be 256 bits wide
+ * @return {Buffer}
+ */
+exports.privateToAddress = function (privateKey) {
+  return exports.publicToAddress(privateToPublic(privateKey))
+}
 
-  if (util.isFunction(encoding)) {
-    cb = encoding;
-    encoding = null;
-  }
+/**
+ * Checks if the address is a valid. Accepts checksummed addresses too
+ * @param {String} address
+ * @return {Boolean}
+ */
+exports.isValidAddress = function (address) {
+  return /^0x[0-9a-fA-F]{40}$/i.test(address)
+}
 
-  if (util.isBuffer(chunk))
-    encoding = 'buffer';
-  else if (!encoding)
-    encoding = state.defaultEncoding;
+/**
+ * Returns a checksummed address
+ * @param {String} address
+ * @return {String}
+ */
+exports.toChecksumAddress = function (address) {
+  address = exports.stripHexPrefix(address).toLowerCase()
+  var hash = exports.sha3(address).toString('hex')
+  var ret = '0x'
+
+  for (var i = 0; i < address.length; i++) {
+    if (parseInt(hash[i], 16) >= 8) {
+      ret += address[i].toUpperCase()
+    } else {
+      ret += address[i]
+    }
+  }
 
-  if (!util.isFunction(cb))
-    cb = function() {};
+  return ret
+}
 
-  if (state.ended)
-    writeAfterEnd(this, state, cb);
-  else if (validChunk(this, state, chunk, cb)) {
-    state.pendingcb++;
-    ret = writeOrBuffer(this, state, chunk, encoding, cb);
+/**
+ * Checks if the address is a valid checksummed address
+ * @param {Buffer} address
+ * @return {Boolean}
+ */
+exports.isValidChecksumAddress = function (address) {
+  return exports.isValidAddress(address) && (exports.toChecksumAddress(address) === address)
+}
+
+/**
+ * Generates an address of a newly created contract
+ * @param {Buffer} from the address which is creating this new address
+ * @param {Buffer} nonce the nonce of the from account
+ * @return {Buffer}
+ */
+exports.generateAddress = function (from, nonce) {
+  from = exports.toBuffer(from)
+  nonce = new BN(nonce)
+
+  if (nonce.isZero()) {
+    // in RLP we want to encode null in the case of zero nonce
+    // read the RLP documentation for an answer if you dare
+    nonce = null
+  } else {
+    nonce = Buffer.from(nonce.toArray())
   }
 
-  return ret;
-};
+  // Only take the lower 160bits of the hash
+  return exports.rlphash([from, nonce]).slice(-20)
+}
 
-Writable.prototype.cork = function() {
-  var state = this._writableState;
+/**
+ * Returns true if the supplied address belongs to a precompiled account
+ * @param {Buffer|String} address
+ * @return {Boolean}
+ */
+exports.isPrecompiled = function (address) {
+  var a = exports.unpad(address)
+  return a.length === 1 && a[0] > 0 && a[0] < 5
+}
 
-  state.corked++;
-};
+/**
+ * Adds "0x" to a given `String` if it does not already start with "0x"
+ * @param {String} str
+ * @return {String}
+ */
+exports.addHexPrefix = function (str) {
+  if (typeof str !== 'string') {
+    return str
+  }
 
-Writable.prototype.uncork = function() {
-  var state = this._writableState;
+  return exports.isHexPrefixed(str) ? str : '0x' + str
+}
 
-  if (state.corked) {
-    state.corked--;
+/**
+ * Validate ECDSA signature
+ * @method isValidSignature
+ * @param {Buffer} v
+ * @param {Buffer} r
+ * @param {Buffer} s
+ * @param {Boolean} [homestead=true]
+ * @return {Boolean}
+ */
 
-    if (!state.writing &&
-        !state.corked &&
-        !state.finished &&
-        !state.bufferProcessing &&
-        state.buffer.length)
-      clearBuffer(this, state);
-  }
-};
+exports.isValidSignature = function (v, r, s, homestead) {
+  const SECP256K1_N_DIV_2 = new BN('7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0', 16)
+  const SECP256K1_N = new BN('fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141', 16)
 
-function decodeChunk(state, chunk, encoding) {
-  if (!state.objectMode &&
-      state.decodeStrings !== false &&
-      util.isString(chunk)) {
-    chunk = new Buffer(chunk, encoding);
+  if (r.length !== 32 || s.length !== 32) {
+    return false
   }
-  return chunk;
-}
 
-// if we're already writing something, then just put this
-// in the queue, and wait our turn.  Otherwise, call _write
-// If we return false, then we need a drain event, so set that flag.
-function writeOrBuffer(stream, state, chunk, encoding, cb) {
-  chunk = decodeChunk(state, chunk, encoding);
-  if (util.isBuffer(chunk))
-    encoding = 'buffer';
-  var len = state.objectMode ? 1 : chunk.length;
+  if (v !== 27 && v !== 28) {
+    return false
+  }
 
-  state.length += len;
+  r = new BN(r)
+  s = new BN(s)
 
-  var ret = state.length < state.highWaterMark;
-  // we must ensure that previous needDrain will not be reset to false.
-  if (!ret)
-    state.needDrain = true;
+  if (r.isZero() || r.gt(SECP256K1_N) || s.isZero() || s.gt(SECP256K1_N)) {
+    return false
+  }
 
-  if (state.writing || state.corked)
-    state.buffer.push(new WriteReq(chunk, encoding, cb));
-  else
-    doWrite(stream, state, false, len, chunk, encoding, cb);
+  if ((homestead === false) && (new BN(s).cmp(SECP256K1_N_DIV_2) === 1)) {
+    return false
+  }
 
-  return ret;
+  return true
 }
 
-function doWrite(stream, state, writev, len, chunk, encoding, cb) {
-  state.writelen = len;
-  state.writecb = cb;
-  state.writing = true;
-  state.sync = true;
-  if (writev)
-    stream._writev(chunk, state.onwrite);
-  else
-    stream._write(chunk, encoding, state.onwrite);
-  state.sync = false;
+/**
+ * Converts a `Buffer` or `Array` to JSON
+ * @param {Buffer|Array} ba
+ * @return {Array|String|null}
+ */
+exports.baToJSON = function (ba) {
+  if (Buffer.isBuffer(ba)) {
+    return '0x' + ba.toString('hex')
+  } else if (ba instanceof Array) {
+    var array = []
+    for (var i = 0; i < ba.length; i++) {
+      array.push(exports.baToJSON(ba[i]))
+    }
+    return array
+  }
 }
 
-function onwriteError(stream, state, sync, er, cb) {
-  if (sync)
-    process.nextTick(function() {
-      state.pendingcb--;
-      cb(er);
-    });
-  else {
-    state.pendingcb--;
-    cb(er);
+/**
+ * Defines properties on a `Object`. It make the assumption that underlying data is binary.
+ * @param {Object} self the `Object` to define properties on
+ * @param {Array} fields an array fields to define. Fields can contain:
+ * * `name` - the name of the properties
+ * * `length` - the number of bytes the field can have
+ * * `allowLess` - if the field can be less than the length
+ * * `allowEmpty`
+ * @param {*} data data to be validated against the definitions
+ */
+exports.defineProperties = function (self, fields, data) {
+  self.raw = []
+  self._fields = []
+
+  // attach the `toJSON`
+  self.toJSON = function (label) {
+    if (label) {
+      var obj = {}
+      self._fields.forEach(function (field) {
+        obj[field] = '0x' + self[field].toString('hex')
+      })
+      return obj
+    }
+    return exports.baToJSON(this.raw)
   }
 
-  stream._writableState.errorEmitted = true;
-  stream.emit('error', er);
-}
+  self.serialize = function serialize () {
+    return rlp.encode(self.raw)
+  }
 
-function onwriteStateUpdate(state) {
-  state.writing = false;
-  state.writecb = null;
-  state.length -= state.writelen;
-  state.writelen = 0;
-}
+  fields.forEach(function (field, i) {
+    self._fields.push(field.name)
+    function getter () {
+      return self.raw[i]
+    }
+    function setter (v) {
+      v = exports.toBuffer(v)
 
-function onwrite(stream, er) {
-  var state = stream._writableState;
-  var sync = state.sync;
-  var cb = state.writecb;
+      if (v.toString('hex') === '00' && !field.allowZero) {
+        v = Buffer.allocUnsafe(0)
+      }
 
-  onwriteStateUpdate(state);
+      if (field.allowLess && field.length) {
+        v = exports.stripZeros(v)
+        assert(field.length >= v.length, 'The field ' + field.name + ' must not have more ' + field.length + ' bytes')
+      } else if (!(field.allowZero && v.length === 0) && field.length) {
+        assert(field.length === v.length, 'The field ' + field.name + ' must have byte length of ' + field.length)
+      }
 
-  if (er)
-    onwriteError(stream, state, sync, er, cb);
-  else {
-    // Check if we're actually ready to finish, but don't emit yet
-    var finished = needFinish(stream, state);
+      self.raw[i] = v
+    }
 
-    if (!finished &&
-        !state.corked &&
-        !state.bufferProcessing &&
-        state.buffer.length) {
-      clearBuffer(stream, state);
+    Object.defineProperty(self, field.name, {
+      enumerable: true,
+      configurable: true,
+      get: getter,
+      set: setter
+    })
+
+    if (field.default) {
+      self[field.name] = field.default
     }
 
-    if (sync) {
-      process.nextTick(function() {
-        afterWrite(stream, state, finished, cb);
-      });
+    // attach alias
+    if (field.alias) {
+      Object.defineProperty(self, field.alias, {
+        enumerable: false,
+        configurable: true,
+        set: setter,
+        get: getter
+      })
+    }
+  })
+
+  // if the constuctor is passed data
+  if (data) {
+    if (typeof data === 'string') {
+      data = Buffer.from(exports.stripHexPrefix(data), 'hex')
+    }
+
+    if (Buffer.isBuffer(data)) {
+      data = rlp.decode(data)
+    }
+
+    if (Array.isArray(data)) {
+      if (data.length > self._fields.length) {
+        throw (new Error('wrong number of fields in data'))
+      }
+
+      // make sure all the items are buffers
+      data.forEach(function (d, i) {
+        self[self._fields[i]] = exports.toBuffer(d)
+      })
+    } else if (typeof data === 'object') {
+      const keys = Object.keys(data)
+      fields.forEach(function (field) {
+        if (keys.indexOf(field.name) !== -1) self[field.name] = data[field.name]
+        if (keys.indexOf(field.alias) !== -1) self[field.alias] = data[field.alias]
+      })
     } else {
-      afterWrite(stream, state, finished, cb);
+      throw new Error('invalid data')
     }
   }
 }
 
-function afterWrite(stream, state, finished, cb) {
-  if (!finished)
-    onwriteDrain(stream, state);
-  state.pendingcb--;
-  cb();
-  finishMaybe(stream, state);
+}).call(this,require("buffer").Buffer)
+},{"assert":1,"bn.js":33,"buffer":5,"create-hash":36,"ethjs-util":56,"keccak":65,"rlp":72,"secp256k1":73}],32:[function(require,module,exports){
+(function (Buffer){
+// Reference https://github.com/bitcoin/bips/blob/master/bip-0066.mediawiki
+// Format: 0x30 [total-length] 0x02 [R-length] [R] 0x02 [S-length] [S]
+// NOTE: SIGHASH byte ignored AND restricted, truncate before use
+
+function check (buffer) {
+  if (buffer.length < 8) return false
+  if (buffer.length > 72) return false
+  if (buffer[0] !== 0x30) return false
+  if (buffer[1] !== buffer.length - 2) return false
+  if (buffer[2] !== 0x02) return false
+
+  var lenR = buffer[3]
+  if (lenR === 0) return false
+  if (5 + lenR >= buffer.length) return false
+  if (buffer[4 + lenR] !== 0x02) return false
+
+  var lenS = buffer[5 + lenR]
+  if (lenS === 0) return false
+  if ((6 + lenR + lenS) !== buffer.length) return false
+
+  if (buffer[4] & 0x80) return false
+  if (lenR > 1 && (buffer[4] === 0x00) && !(buffer[5] & 0x80)) return false
+
+  if (buffer[lenR + 6] & 0x80) return false
+  if (lenS > 1 && (buffer[lenR + 6] === 0x00) && !(buffer[lenR + 7] & 0x80)) return false
+  return true
 }
 
-// Must force callback to be called on nextTick, so that we don't
-// emit 'drain' before the write() consumer gets the 'false' return
-// value, and has a chance to attach a 'drain' listener.
-function onwriteDrain(stream, state) {
-  if (state.length === 0 && state.needDrain) {
-    state.needDrain = false;
-    stream.emit('drain');
-  }
-}
+function decode (buffer) {
+  if (buffer.length < 8) throw new Error('DER sequence length is too short')
+  if (buffer.length > 72) throw new Error('DER sequence length is too long')
+  if (buffer[0] !== 0x30) throw new Error('Expected DER sequence')
+  if (buffer[1] !== buffer.length - 2) throw new Error('DER sequence length is invalid')
+  if (buffer[2] !== 0x02) throw new Error('Expected DER integer')
 
+  var lenR = buffer[3]
+  if (lenR === 0) throw new Error('R length is zero')
+  if (5 + lenR >= buffer.length) throw new Error('R length is too long')
+  if (buffer[4 + lenR] !== 0x02) throw new Error('Expected DER integer (2)')
 
-// if there's something in the buffer waiting, then process it
-function clearBuffer(stream, state) {
-  state.bufferProcessing = true;
+  var lenS = buffer[5 + lenR]
+  if (lenS === 0) throw new Error('S length is zero')
+  if ((6 + lenR + lenS) !== buffer.length) throw new Error('S length is invalid')
 
-  if (stream._writev && state.buffer.length > 1) {
-    // Fast case, write everything using _writev()
-    var cbs = [];
-    for (var c = 0; c < state.buffer.length; c++)
-      cbs.push(state.buffer[c].callback);
+  if (buffer[4] & 0x80) throw new Error('R value is negative')
+  if (lenR > 1 && (buffer[4] === 0x00) && !(buffer[5] & 0x80)) throw new Error('R value excessively padded')
 
-    // count the one we are adding, as well.
-    // TODO(isaacs) clean this up
-    state.pendingcb++;
-    doWrite(stream, state, true, state.length, state.buffer, '', function(err) {
-      for (var i = 0; i < cbs.length; i++) {
-        state.pendingcb--;
-        cbs[i](err);
-      }
-    });
+  if (buffer[lenR + 6] & 0x80) throw new Error('S value is negative')
+  if (lenS > 1 && (buffer[lenR + 6] === 0x00) && !(buffer[lenR + 7] & 0x80)) throw new Error('S value excessively padded')
 
-    // Clear buffer
-    state.buffer = [];
-  } else {
-    // Slow case, write chunks one-by-one
-    for (var c = 0; c < state.buffer.length; c++) {
-      var entry = state.buffer[c];
-      var chunk = entry.chunk;
-      var encoding = entry.encoding;
-      var cb = entry.callback;
-      var len = state.objectMode ? 1 : chunk.length;
+  // non-BIP66 - extract R, S values
+  return {
+    r: buffer.slice(4, 4 + lenR),
+    s: buffer.slice(6 + lenR)
+  }
+}
 
-      doWrite(stream, state, false, len, chunk, encoding, cb);
+/*
+ * Expects r and s to be positive DER integers.
+ *
+ * The DER format uses the most significant bit as a sign bit (& 0x80).
+ * If the significant bit is set AND the integer is positive, a 0x00 is prepended.
+ *
+ * Examples:
+ *
+ *      0 =>     0x00
+ *      1 =>     0x01
+ *     -1 =>     0xff
+ *    127 =>     0x7f
+ *   -127 =>     0x81
+ *    128 =>   0x0080
+ *   -128 =>     0x80
+ *    255 =>   0x00ff
+ *   -255 =>   0xff01
+ *  16300 =>   0x3fac
+ * -16300 =>   0xc054
+ *  62300 => 0x00f35c
+ * -62300 => 0xff0ca4
+*/
+function encode (r, s) {
+  var lenR = r.length
+  var lenS = s.length
+  if (lenR === 0) throw new Error('R length is zero')
+  if (lenS === 0) throw new Error('S length is zero')
+  if (lenR > 33) throw new Error('R length is too long')
+  if (lenS > 33) throw new Error('S length is too long')
+  if (r[0] & 0x80) throw new Error('R value is negative')
+  if (s[0] & 0x80) throw new Error('S value is negative')
+  if (lenR > 1 && (r[0] === 0x00) && !(r[1] & 0x80)) throw new Error('R value excessively padded')
+  if (lenS > 1 && (s[0] === 0x00) && !(s[1] & 0x80)) throw new Error('S value excessively padded')
+
+  var signature = new Buffer(6 + lenR + lenS)
+
+  // 0x30 [total-length] 0x02 [R-length] [R] 0x02 [S-length] [S]
+  signature[0] = 0x30
+  signature[1] = signature.length - 2
+  signature[2] = 0x02
+  signature[3] = r.length
+  r.copy(signature, 4)
+  signature[4 + lenR] = 0x02
+  signature[5 + lenR] = s.length
+  s.copy(signature, 6 + lenR)
+
+  return signature
+}
 
-      // if we didn't call the onwrite immediately, then
-      // it means that we need to wait until it does.
-      // also, that means that the chunk and cb are currently
-      // being processed, so move the buffer counter past them.
-      if (state.writing) {
-        c++;
-        break;
-      }
-    }
+module.exports = {
+  check: check,
+  decode: decode,
+  encode: encode
+}
 
-    if (c < state.buffer.length)
-      state.buffer = state.buffer.slice(c);
-    else
-      state.buffer.length = 0;
+}).call(this,require("buffer").Buffer)
+},{"buffer":5}],33:[function(require,module,exports){
+(function (module, exports) {
+  'use strict';
+
+  // Utils
+  function assert (val, msg) {
+    if (!val) throw new Error(msg || 'Assertion failed');
   }
 
-  state.bufferProcessing = false;
-}
+  // Could use `inherits` module, but don't want to move from single file
+  // architecture yet.
+  function inherits (ctor, superCtor) {
+    ctor.super_ = superCtor;
+    var TempCtor = function () {};
+    TempCtor.prototype = superCtor.prototype;
+    ctor.prototype = new TempCtor();
+    ctor.prototype.constructor = ctor;
+  }
 
-Writable.prototype._write = function(chunk, encoding, cb) {
-  cb(new Error('not implemented'));
+  // BN
 
-};
+  function BN (number, base, endian) {
+    if (BN.isBN(number)) {
+      return number;
+    }
 
-Writable.prototype._writev = null;
+    this.negative = 0;
+    this.words = null;
+    this.length = 0;
 
-Writable.prototype.end = function(chunk, encoding, cb) {
-  var state = this._writableState;
+    // Reduction context
+    this.red = null;
 
-  if (util.isFunction(chunk)) {
-    cb = chunk;
-    chunk = null;
-    encoding = null;
-  } else if (util.isFunction(encoding)) {
-    cb = encoding;
-    encoding = null;
-  }
+    if (number !== null) {
+      if (base === 'le' || base === 'be') {
+        endian = base;
+        base = 10;
+      }
 
-  if (!util.isNullOrUndefined(chunk))
-    this.write(chunk, encoding);
+      this._init(number || 0, base || 10, endian || 'be');
+    }
+  }
+  if (typeof module === 'object') {
+    module.exports = BN;
+  } else {
+    exports.BN = BN;
+  }
 
-  // .end() fully uncorks
-  if (state.corked) {
-    state.corked = 1;
-    this.uncork();
+  BN.BN = BN;
+  BN.wordSize = 26;
+
+  var Buffer;
+  try {
+    Buffer = require('buf' + 'fer').Buffer;
+  } catch (e) {
   }
 
-  // ignore unnecessary end() calls.
-  if (!state.ending && !state.finished)
-    endWritable(this, state, cb);
-};
+  BN.isBN = function isBN (num) {
+    if (num instanceof BN) {
+      return true;
+    }
 
+    return num !== null && typeof num === 'object' &&
+      num.constructor.wordSize === BN.wordSize && Array.isArray(num.words);
+  };
 
-function needFinish(stream, state) {
-  return (state.ending &&
-          state.length === 0 &&
-          !state.finished &&
-          !state.writing);
-}
+  BN.max = function max (left, right) {
+    if (left.cmp(right) > 0) return left;
+    return right;
+  };
 
-function prefinish(stream, state) {
-  if (!state.prefinished) {
-    state.prefinished = true;
-    stream.emit('prefinish');
-  }
-}
+  BN.min = function min (left, right) {
+    if (left.cmp(right) < 0) return left;
+    return right;
+  };
 
-function finishMaybe(stream, state) {
-  var need = needFinish(stream, state);
-  if (need) {
-    if (state.pendingcb === 0) {
-      prefinish(stream, state);
-      state.finished = true;
-      stream.emit('finish');
-    } else
-      prefinish(stream, state);
-  }
-  return need;
-}
+  BN.prototype._init = function init (number, base, endian) {
+    if (typeof number === 'number') {
+      return this._initNumber(number, base, endian);
+    }
 
-function endWritable(stream, state, cb) {
-  state.ending = true;
-  finishMaybe(stream, state);
-  if (cb) {
-    if (state.finished)
-      process.nextTick(cb);
-    else
-      stream.once('finish', cb);
-  }
-  state.ended = true;
-}
+    if (typeof number === 'object') {
+      return this._initArray(number, base, endian);
+    }
 
-}).call(this,require('_process'))
-},{"./_stream_duplex":16,"_process":14,"buffer":7,"core-util-is":21,"inherits":12,"stream":26}],21:[function(require,module,exports){
-(function (Buffer){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+    if (base === 'hex') {
+      base = 16;
+    }
+    assert(base === (base | 0) && base >= 2 && base <= 36);
 
-// NOTE: These type checking functions intentionally don't use `instanceof`
-// because it is fragile and can be easily faked with `Object.create()`.
-function isArray(ar) {
-  return Array.isArray(ar);
-}
-exports.isArray = isArray;
+    number = number.toString().replace(/\s+/g, '');
+    var start = 0;
+    if (number[0] === '-') {
+      start++;
+    }
 
-function isBoolean(arg) {
-  return typeof arg === 'boolean';
-}
-exports.isBoolean = isBoolean;
+    if (base === 16) {
+      this._parseHex(number, start);
+    } else {
+      this._parseBase(number, base, start);
+    }
 
-function isNull(arg) {
-  return arg === null;
-}
-exports.isNull = isNull;
+    if (number[0] === '-') {
+      this.negative = 1;
+    }
 
-function isNullOrUndefined(arg) {
-  return arg == null;
-}
-exports.isNullOrUndefined = isNullOrUndefined;
+    this.strip();
 
-function isNumber(arg) {
-  return typeof arg === 'number';
-}
-exports.isNumber = isNumber;
+    if (endian !== 'le') return;
 
-function isString(arg) {
-  return typeof arg === 'string';
-}
-exports.isString = isString;
+    this._initArray(this.toArray(), base, endian);
+  };
 
-function isSymbol(arg) {
-  return typeof arg === 'symbol';
-}
-exports.isSymbol = isSymbol;
+  BN.prototype._initNumber = function _initNumber (number, base, endian) {
+    if (number < 0) {
+      this.negative = 1;
+      number = -number;
+    }
+    if (number < 0x4000000) {
+      this.words = [ number & 0x3ffffff ];
+      this.length = 1;
+    } else if (number < 0x10000000000000) {
+      this.words = [
+        number & 0x3ffffff,
+        (number / 0x4000000) & 0x3ffffff
+      ];
+      this.length = 2;
+    } else {
+      assert(number < 0x20000000000000); // 2 ^ 53 (unsafe)
+      this.words = [
+        number & 0x3ffffff,
+        (number / 0x4000000) & 0x3ffffff,
+        1
+      ];
+      this.length = 3;
+    }
 
-function isUndefined(arg) {
-  return arg === void 0;
-}
-exports.isUndefined = isUndefined;
+    if (endian !== 'le') return;
 
-function isRegExp(re) {
-  return isObject(re) && objectToString(re) === '[object RegExp]';
-}
-exports.isRegExp = isRegExp;
+    // Reverse the bytes
+    this._initArray(this.toArray(), base, endian);
+  };
 
-function isObject(arg) {
-  return typeof arg === 'object' && arg !== null;
-}
-exports.isObject = isObject;
+  BN.prototype._initArray = function _initArray (number, base, endian) {
+    // Perhaps a Uint8Array
+    assert(typeof number.length === 'number');
+    if (number.length <= 0) {
+      this.words = [ 0 ];
+      this.length = 1;
+      return this;
+    }
 
-function isDate(d) {
-  return isObject(d) && objectToString(d) === '[object Date]';
-}
-exports.isDate = isDate;
+    this.length = Math.ceil(number.length / 3);
+    this.words = new Array(this.length);
+    for (var i = 0; i < this.length; i++) {
+      this.words[i] = 0;
+    }
 
-function isError(e) {
-  return isObject(e) &&
-      (objectToString(e) === '[object Error]' || e instanceof Error);
-}
-exports.isError = isError;
+    var j, w;
+    var off = 0;
+    if (endian === 'be') {
+      for (i = number.length - 1, j = 0; i >= 0; i -= 3) {
+        w = number[i] | (number[i - 1] << 8) | (number[i - 2] << 16);
+        this.words[j] |= (w << off) & 0x3ffffff;
+        this.words[j + 1] = (w >>> (26 - off)) & 0x3ffffff;
+        off += 24;
+        if (off >= 26) {
+          off -= 26;
+          j++;
+        }
+      }
+    } else if (endian === 'le') {
+      for (i = 0, j = 0; i < number.length; i += 3) {
+        w = number[i] | (number[i + 1] << 8) | (number[i + 2] << 16);
+        this.words[j] |= (w << off) & 0x3ffffff;
+        this.words[j + 1] = (w >>> (26 - off)) & 0x3ffffff;
+        off += 24;
+        if (off >= 26) {
+          off -= 26;
+          j++;
+        }
+      }
+    }
+    return this.strip();
+  };
 
-function isFunction(arg) {
-  return typeof arg === 'function';
-}
-exports.isFunction = isFunction;
+  function parseHex (str, start, end) {
+    var r = 0;
+    var len = Math.min(str.length, end);
+    for (var i = start; i < len; i++) {
+      var c = str.charCodeAt(i) - 48;
 
-function isPrimitive(arg) {
-  return arg === null ||
-         typeof arg === 'boolean' ||
-         typeof arg === 'number' ||
-         typeof arg === 'string' ||
-         typeof arg === 'symbol' ||  // ES6 symbol
-         typeof arg === 'undefined';
-}
-exports.isPrimitive = isPrimitive;
+      r <<= 4;
 
-function isBuffer(arg) {
-  return Buffer.isBuffer(arg);
-}
-exports.isBuffer = isBuffer;
+      // 'a' - 'f'
+      if (c >= 49 && c <= 54) {
+        r |= c - 49 + 0xa;
 
-function objectToString(o) {
-  return Object.prototype.toString.call(o);
-}
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],22:[function(require,module,exports){
-module.exports = require("./lib/_stream_passthrough.js")
+      // 'A' - 'F'
+      } else if (c >= 17 && c <= 22) {
+        r |= c - 17 + 0xa;
 
-},{"./lib/_stream_passthrough.js":17}],23:[function(require,module,exports){
-exports = module.exports = require('./lib/_stream_readable.js');
-exports.Stream = require('stream');
-exports.Readable = exports;
-exports.Writable = require('./lib/_stream_writable.js');
-exports.Duplex = require('./lib/_stream_duplex.js');
-exports.Transform = require('./lib/_stream_transform.js');
-exports.PassThrough = require('./lib/_stream_passthrough.js');
+      // '0' - '9'
+      } else {
+        r |= c & 0xf;
+      }
+    }
+    return r;
+  }
+
+  BN.prototype._parseHex = function _parseHex (number, start) {
+    // Create possibly bigger array to ensure that it fits the number
+    this.length = Math.ceil((number.length - start) / 6);
+    this.words = new Array(this.length);
+    for (var i = 0; i < this.length; i++) {
+      this.words[i] = 0;
+    }
+
+    var j, w;
+    // Scan 24-bit chunks and add them to the number
+    var off = 0;
+    for (i = number.length - 6, j = 0; i >= start; i -= 6) {
+      w = parseHex(number, i, i + 6);
+      this.words[j] |= (w << off) & 0x3ffffff;
+      // NOTE: `0x3fffff` is intentional here, 26bits max shift + 24bit hex limb
+      this.words[j + 1] |= w >>> (26 - off) & 0x3fffff;
+      off += 24;
+      if (off >= 26) {
+        off -= 26;
+        j++;
+      }
+    }
+    if (i + 6 !== start) {
+      w = parseHex(number, start, i + 6);
+      this.words[j] |= (w << off) & 0x3ffffff;
+      this.words[j + 1] |= w >>> (26 - off) & 0x3fffff;
+    }
+    this.strip();
+  };
 
-},{"./lib/_stream_duplex.js":16,"./lib/_stream_passthrough.js":17,"./lib/_stream_readable.js":18,"./lib/_stream_transform.js":19,"./lib/_stream_writable.js":20,"stream":26}],24:[function(require,module,exports){
-module.exports = require("./lib/_stream_transform.js")
+  function parseBase (str, start, end, mul) {
+    var r = 0;
+    var len = Math.min(str.length, end);
+    for (var i = start; i < len; i++) {
+      var c = str.charCodeAt(i) - 48;
 
-},{"./lib/_stream_transform.js":19}],25:[function(require,module,exports){
-module.exports = require("./lib/_stream_writable.js")
+      r *= mul;
 
-},{"./lib/_stream_writable.js":20}],26:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+      // 'a'
+      if (c >= 49) {
+        r += c - 49 + 0xa;
 
-module.exports = Stream;
+      // 'A'
+      } else if (c >= 17) {
+        r += c - 17 + 0xa;
 
-var EE = require('events').EventEmitter;
-var inherits = require('inherits');
+      // '0' - '9'
+      } else {
+        r += c;
+      }
+    }
+    return r;
+  }
 
-inherits(Stream, EE);
-Stream.Readable = require('readable-stream/readable.js');
-Stream.Writable = require('readable-stream/writable.js');
-Stream.Duplex = require('readable-stream/duplex.js');
-Stream.Transform = require('readable-stream/transform.js');
-Stream.PassThrough = require('readable-stream/passthrough.js');
+  BN.prototype._parseBase = function _parseBase (number, base, start) {
+    // Initialize as zero
+    this.words = [ 0 ];
+    this.length = 1;
 
-// Backwards-compat with node 0.4.x
-Stream.Stream = Stream;
+    // Find length of limb in base
+    for (var limbLen = 0, limbPow = 1; limbPow <= 0x3ffffff; limbPow *= base) {
+      limbLen++;
+    }
+    limbLen--;
+    limbPow = (limbPow / base) | 0;
 
+    var total = number.length - start;
+    var mod = total % limbLen;
+    var end = Math.min(total, total - mod) + start;
 
+    var word = 0;
+    for (var i = start; i < end; i += limbLen) {
+      word = parseBase(number, i, i + limbLen, base);
 
-// old-style streams.  Note that the pipe method (the only relevant
-// part of this class) is overridden in the Readable class.
+      this.imuln(limbPow);
+      if (this.words[0] + word < 0x4000000) {
+        this.words[0] += word;
+      } else {
+        this._iaddn(word);
+      }
+    }
 
-function Stream() {
-  EE.call(this);
-}
+    if (mod !== 0) {
+      var pow = 1;
+      word = parseBase(number, i, number.length, base);
 
-Stream.prototype.pipe = function(dest, options) {
-  var source = this;
+      for (i = 0; i < mod; i++) {
+        pow *= base;
+      }
 
-  function ondata(chunk) {
-    if (dest.writable) {
-      if (false === dest.write(chunk) && source.pause) {
-        source.pause();
+      this.imuln(pow);
+      if (this.words[0] + word < 0x4000000) {
+        this.words[0] += word;
+      } else {
+        this._iaddn(word);
       }
     }
-  }
+  };
 
-  source.on('data', ondata);
+  BN.prototype.copy = function copy (dest) {
+    dest.words = new Array(this.length);
+    for (var i = 0; i < this.length; i++) {
+      dest.words[i] = this.words[i];
+    }
+    dest.length = this.length;
+    dest.negative = this.negative;
+    dest.red = this.red;
+  };
 
-  function ondrain() {
-    if (source.readable && source.resume) {
-      source.resume();
+  BN.prototype.clone = function clone () {
+    var r = new BN(null);
+    this.copy(r);
+    return r;
+  };
+
+  BN.prototype._expand = function _expand (size) {
+    while (this.length < size) {
+      this.words[this.length++] = 0;
+    }
+    return this;
+  };
+
+  // Remove leading `0` from `this`
+  BN.prototype.strip = function strip () {
+    while (this.length > 1 && this.words[this.length - 1] === 0) {
+      this.length--;
+    }
+    return this._normSign();
+  };
+
+  BN.prototype._normSign = function _normSign () {
+    // -0 = 0
+    if (this.length === 1 && this.words[0] === 0) {
+      this.negative = 0;
     }
-  }
+    return this;
+  };
 
-  dest.on('drain', ondrain);
+  BN.prototype.inspect = function inspect () {
+    return (this.red ? '<BN-R: ' : '<BN: ') + this.toString(16) + '>';
+  };
 
-  // If the 'end' option is not supplied, dest.end() will be called when
-  // source gets the 'end' or 'close' events.  Only dest.end() once.
-  if (!dest._isStdio && (!options || options.end !== false)) {
-    source.on('end', onend);
-    source.on('close', onclose);
-  }
+  /*
 
-  var didOnEnd = false;
-  function onend() {
-    if (didOnEnd) return;
-    didOnEnd = true;
+  var zeros = [];
+  var groupSizes = [];
+  var groupBases = [];
 
-    dest.end();
+  var s = '';
+  var i = -1;
+  while (++i < BN.wordSize) {
+    zeros[i] = s;
+    s += '0';
+  }
+  groupSizes[0] = 0;
+  groupSizes[1] = 0;
+  groupBases[0] = 0;
+  groupBases[1] = 0;
+  var base = 2 - 1;
+  while (++base < 36 + 1) {
+    var groupSize = 0;
+    var groupBase = 1;
+    while (groupBase < (1 << BN.wordSize) / base) {
+      groupBase *= base;
+      groupSize += 1;
+    }
+    groupSizes[base] = groupSize;
+    groupBases[base] = groupBase;
   }
 
+  */
 
-  function onclose() {
-    if (didOnEnd) return;
-    didOnEnd = true;
+  var zeros = [
+    '',
+    '0',
+    '00',
+    '000',
+    '0000',
+    '00000',
+    '000000',
+    '0000000',
+    '00000000',
+    '000000000',
+    '0000000000',
+    '00000000000',
+    '000000000000',
+    '0000000000000',
+    '00000000000000',
+    '000000000000000',
+    '0000000000000000',
+    '00000000000000000',
+    '000000000000000000',
+    '0000000000000000000',
+    '00000000000000000000',
+    '000000000000000000000',
+    '0000000000000000000000',
+    '00000000000000000000000',
+    '000000000000000000000000',
+    '0000000000000000000000000'
+  ];
+
+  var groupSizes = [
+    0, 0,
+    25, 16, 12, 11, 10, 9, 8,
+    8, 7, 7, 7, 7, 6, 6,
+    6, 6, 6, 6, 6, 5, 5,
+    5, 5, 5, 5, 5, 5, 5,
+    5, 5, 5, 5, 5, 5, 5
+  ];
+
+  var groupBases = [
+    0, 0,
+    33554432, 43046721, 16777216, 48828125, 60466176, 40353607, 16777216,
+    43046721, 10000000, 19487171, 35831808, 62748517, 7529536, 11390625,
+    16777216, 24137569, 34012224, 47045881, 64000000, 4084101, 5153632,
+    6436343, 7962624, 9765625, 11881376, 14348907, 17210368, 20511149,
+    24300000, 28629151, 33554432, 39135393, 45435424, 52521875, 60466176
+  ];
+
+  BN.prototype.toString = function toString (base, padding) {
+    base = base || 10;
+    padding = padding | 0 || 1;
+
+    var out;
+    if (base === 16 || base === 'hex') {
+      out = '';
+      var off = 0;
+      var carry = 0;
+      for (var i = 0; i < this.length; i++) {
+        var w = this.words[i];
+        var word = (((w << off) | carry) & 0xffffff).toString(16);
+        carry = (w >>> (24 - off)) & 0xffffff;
+        if (carry !== 0 || i !== this.length - 1) {
+          out = zeros[6 - word.length] + word + out;
+        } else {
+          out = word + out;
+        }
+        off += 2;
+        if (off >= 26) {
+          off -= 26;
+          i--;
+        }
+      }
+      if (carry !== 0) {
+        out = carry.toString(16) + out;
+      }
+      while (out.length % padding !== 0) {
+        out = '0' + out;
+      }
+      if (this.negative !== 0) {
+        out = '-' + out;
+      }
+      return out;
+    }
+
+    if (base === (base | 0) && base >= 2 && base <= 36) {
+      // var groupSize = Math.floor(BN.wordSize * Math.LN2 / Math.log(base));
+      var groupSize = groupSizes[base];
+      // var groupBase = Math.pow(base, groupSize);
+      var groupBase = groupBases[base];
+      out = '';
+      var c = this.clone();
+      c.negative = 0;
+      while (!c.isZero()) {
+        var r = c.modn(groupBase).toString(base);
+        c = c.idivn(groupBase);
+
+        if (!c.isZero()) {
+          out = zeros[groupSize - r.length] + r + out;
+        } else {
+          out = r + out;
+        }
+      }
+      if (this.isZero()) {
+        out = '0' + out;
+      }
+      while (out.length % padding !== 0) {
+        out = '0' + out;
+      }
+      if (this.negative !== 0) {
+        out = '-' + out;
+      }
+      return out;
+    }
 
-    if (typeof dest.destroy === 'function') dest.destroy();
-  }
+    assert(false, 'Base should be between 2 and 36');
+  };
 
-  // don't leave dangling pipes when there are errors.
-  function onerror(er) {
-    cleanup();
-    if (EE.listenerCount(this, 'error') === 0) {
-      throw er; // Unhandled stream error in pipe.
-    }
-  }
+  BN.prototype.toNumber = function toNumber () {
+    var ret = this.words[0];
+    if (this.length === 2) {
+      ret += this.words[1] * 0x4000000;
+    } else if (this.length === 3 && this.words[2] === 0x01) {
+      // NOTE: at this stage it is known that the top bit is set
+      ret += 0x10000000000000 + (this.words[1] * 0x4000000);
+    } else if (this.length > 2) {
+      assert(false, 'Number can only safely store up to 53 bits');
+    }
+    return (this.negative !== 0) ? -ret : ret;
+  };
 
-  source.on('error', onerror);
-  dest.on('error', onerror);
+  BN.prototype.toJSON = function toJSON () {
+    return this.toString(16);
+  };
 
-  // remove all the event listeners that were added.
-  function cleanup() {
-    source.removeListener('data', ondata);
-    dest.removeListener('drain', ondrain);
+  BN.prototype.toBuffer = function toBuffer (endian, length) {
+    assert(typeof Buffer !== 'undefined');
+    return this.toArrayLike(Buffer, endian, length);
+  };
 
-    source.removeListener('end', onend);
-    source.removeListener('close', onclose);
+  BN.prototype.toArray = function toArray (endian, length) {
+    return this.toArrayLike(Array, endian, length);
+  };
 
-    source.removeListener('error', onerror);
-    dest.removeListener('error', onerror);
+  BN.prototype.toArrayLike = function toArrayLike (ArrayType, endian, length) {
+    var byteLength = this.byteLength();
+    var reqLength = length || Math.max(1, byteLength);
+    assert(byteLength <= reqLength, 'byte array longer than desired length');
+    assert(reqLength > 0, 'Requested array length <= 0');
+
+    this.strip();
+    var littleEndian = endian === 'le';
+    var res = new ArrayType(reqLength);
+
+    var b, i;
+    var q = this.clone();
+    if (!littleEndian) {
+      // Assume big-endian
+      for (i = 0; i < reqLength - byteLength; i++) {
+        res[i] = 0;
+      }
 
-    source.removeListener('end', cleanup);
-    source.removeListener('close', cleanup);
+      for (i = 0; !q.isZero(); i++) {
+        b = q.andln(0xff);
+        q.iushrn(8);
 
-    dest.removeListener('close', cleanup);
-  }
+        res[reqLength - i - 1] = b;
+      }
+    } else {
+      for (i = 0; !q.isZero(); i++) {
+        b = q.andln(0xff);
+        q.iushrn(8);
 
-  source.on('end', cleanup);
-  source.on('close', cleanup);
+        res[i] = b;
+      }
 
-  dest.on('close', cleanup);
+      for (; i < reqLength; i++) {
+        res[i] = 0;
+      }
+    }
 
-  dest.emit('pipe', source);
+    return res;
+  };
 
-  // Allow for unix-like usage: A.pipe(B).pipe(C)
-  return dest;
-};
+  if (Math.clz32) {
+    BN.prototype._countBits = function _countBits (w) {
+      return 32 - Math.clz32(w);
+    };
+  } else {
+    BN.prototype._countBits = function _countBits (w) {
+      var t = w;
+      var r = 0;
+      if (t >= 0x1000) {
+        r += 13;
+        t >>>= 13;
+      }
+      if (t >= 0x40) {
+        r += 7;
+        t >>>= 7;
+      }
+      if (t >= 0x8) {
+        r += 4;
+        t >>>= 4;
+      }
+      if (t >= 0x02) {
+        r += 2;
+        t >>>= 2;
+      }
+      return r + t;
+    };
+  }
 
-},{"events":11,"inherits":12,"readable-stream/duplex.js":15,"readable-stream/passthrough.js":22,"readable-stream/readable.js":23,"readable-stream/transform.js":24,"readable-stream/writable.js":25}],27:[function(require,module,exports){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+  BN.prototype._zeroBits = function _zeroBits (w) {
+    // Short-cut
+    if (w === 0) return 26;
 
-var Buffer = require('buffer').Buffer;
+    var t = w;
+    var r = 0;
+    if ((t & 0x1fff) === 0) {
+      r += 13;
+      t >>>= 13;
+    }
+    if ((t & 0x7f) === 0) {
+      r += 7;
+      t >>>= 7;
+    }
+    if ((t & 0xf) === 0) {
+      r += 4;
+      t >>>= 4;
+    }
+    if ((t & 0x3) === 0) {
+      r += 2;
+      t >>>= 2;
+    }
+    if ((t & 0x1) === 0) {
+      r++;
+    }
+    return r;
+  };
 
-var isBufferEncoding = Buffer.isEncoding
-  || function(encoding) {
-       switch (encoding && encoding.toLowerCase()) {
-         case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true;
-         default: return false;
-       }
-     }
+  // Return number of used bits in a BN
+  BN.prototype.bitLength = function bitLength () {
+    var w = this.words[this.length - 1];
+    var hi = this._countBits(w);
+    return (this.length - 1) * 26 + hi;
+  };
 
+  function toBitArray (num) {
+    var w = new Array(num.bitLength());
 
-function assertEncoding(encoding) {
-  if (encoding && !isBufferEncoding(encoding)) {
-    throw new Error('Unknown encoding: ' + encoding);
-  }
-}
+    for (var bit = 0; bit < w.length; bit++) {
+      var off = (bit / 26) | 0;
+      var wbit = bit % 26;
 
-// StringDecoder provides an interface for efficiently splitting a series of
-// buffers into a series of JS strings without breaking apart multi-byte
-// characters. CESU-8 is handled as part of the UTF-8 encoding.
-//
-// @TODO Handling all encodings inside a single object makes it very difficult
-// to reason about this code, so it should be split up in the future.
-// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code
-// points as used by CESU-8.
-var StringDecoder = exports.StringDecoder = function(encoding) {
-  this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');
-  assertEncoding(encoding);
-  switch (this.encoding) {
-    case 'utf8':
-      // CESU-8 represents each of Surrogate Pair by 3-bytes
-      this.surrogateSize = 3;
-      break;
-    case 'ucs2':
-    case 'utf16le':
-      // UTF-16 represents each of Surrogate Pair by 2-bytes
-      this.surrogateSize = 2;
-      this.detectIncompleteChar = utf16DetectIncompleteChar;
-      break;
-    case 'base64':
-      // Base-64 stores 3 bytes in 4 chars, and pads the remainder.
-      this.surrogateSize = 3;
-      this.detectIncompleteChar = base64DetectIncompleteChar;
-      break;
-    default:
-      this.write = passThroughWrite;
-      return;
+      w[bit] = (num.words[off] & (1 << wbit)) >>> wbit;
+    }
+
+    return w;
   }
 
-  // Enough space to store all bytes of a single character. UTF-8 needs 4
-  // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate).
-  this.charBuffer = new Buffer(6);
-  // Number of bytes received for the current incomplete multi-byte character.
-  this.charReceived = 0;
-  // Number of bytes expected for the current incomplete multi-byte character.
-  this.charLength = 0;
-};
+  // Number of trailing zero bits
+  BN.prototype.zeroBits = function zeroBits () {
+    if (this.isZero()) return 0;
 
+    var r = 0;
+    for (var i = 0; i < this.length; i++) {
+      var b = this._zeroBits(this.words[i]);
+      r += b;
+      if (b !== 26) break;
+    }
+    return r;
+  };
 
-// write decodes the given buffer and returns it as JS string that is
-// guaranteed to not contain any partial multi-byte characters. Any partial
-// character found at the end of the buffer is buffered up, and will be
-// returned when calling write again with the remaining bytes.
-//
-// Note: Converting a Buffer containing an orphan surrogate to a String
-// currently works, but converting a String to a Buffer (via `new Buffer`, or
-// Buffer#write) will replace incomplete surrogates with the unicode
-// replacement character. See https://codereview.chromium.org/121173009/ .
-StringDecoder.prototype.write = function(buffer) {
-  var charStr = '';
-  // if our last write ended with an incomplete multibyte character
-  while (this.charLength) {
-    // determine how many remaining bytes this buffer has to offer for this char
-    var available = (buffer.length >= this.charLength - this.charReceived) ?
-        this.charLength - this.charReceived :
-        buffer.length;
+  BN.prototype.byteLength = function byteLength () {
+    return Math.ceil(this.bitLength() / 8);
+  };
 
-    // add the new bytes to the char buffer
-    buffer.copy(this.charBuffer, this.charReceived, 0, available);
-    this.charReceived += available;
+  BN.prototype.toTwos = function toTwos (width) {
+    if (this.negative !== 0) {
+      return this.abs().inotn(width).iaddn(1);
+    }
+    return this.clone();
+  };
 
-    if (this.charReceived < this.charLength) {
-      // still not enough chars in this buffer? wait for more ...
-      return '';
+  BN.prototype.fromTwos = function fromTwos (width) {
+    if (this.testn(width - 1)) {
+      return this.notn(width).iaddn(1).ineg();
     }
+    return this.clone();
+  };
 
-    // remove bytes belonging to the current character from the buffer
-    buffer = buffer.slice(available, buffer.length);
+  BN.prototype.isNeg = function isNeg () {
+    return this.negative !== 0;
+  };
 
-    // get the character that was split
-    charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);
+  // Return negative clone of `this`
+  BN.prototype.neg = function neg () {
+    return this.clone().ineg();
+  };
 
-    // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
-    var charCode = charStr.charCodeAt(charStr.length - 1);
-    if (charCode >= 0xD800 && charCode <= 0xDBFF) {
-      this.charLength += this.surrogateSize;
-      charStr = '';
-      continue;
+  BN.prototype.ineg = function ineg () {
+    if (!this.isZero()) {
+      this.negative ^= 1;
     }
-    this.charReceived = this.charLength = 0;
 
-    // if there are no more bytes in this buffer, just emit our char
-    if (buffer.length === 0) {
-      return charStr;
+    return this;
+  };
+
+  // Or `num` with `this` in-place
+  BN.prototype.iuor = function iuor (num) {
+    while (this.length < num.length) {
+      this.words[this.length++] = 0;
     }
-    break;
-  }
 
-  // determine and set charLength / charReceived
-  this.detectIncompleteChar(buffer);
+    for (var i = 0; i < num.length; i++) {
+      this.words[i] = this.words[i] | num.words[i];
+    }
 
-  var end = buffer.length;
-  if (this.charLength) {
-    // buffer the incomplete character bytes we got
-    buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end);
-    end -= this.charReceived;
-  }
+    return this.strip();
+  };
 
-  charStr += buffer.toString(this.encoding, 0, end);
+  BN.prototype.ior = function ior (num) {
+    assert((this.negative | num.negative) === 0);
+    return this.iuor(num);
+  };
 
-  var end = charStr.length - 1;
-  var charCode = charStr.charCodeAt(end);
-  // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
-  if (charCode >= 0xD800 && charCode <= 0xDBFF) {
-    var size = this.surrogateSize;
-    this.charLength += size;
-    this.charReceived += size;
-    this.charBuffer.copy(this.charBuffer, size, 0, size);
-    buffer.copy(this.charBuffer, 0, 0, size);
-    return charStr.substring(0, end);
-  }
+  // Or `num` with `this`
+  BN.prototype.or = function or (num) {
+    if (this.length > num.length) return this.clone().ior(num);
+    return num.clone().ior(this);
+  };
 
-  // or just emit the charStr
-  return charStr;
-};
+  BN.prototype.uor = function uor (num) {
+    if (this.length > num.length) return this.clone().iuor(num);
+    return num.clone().iuor(this);
+  };
 
-// detectIncompleteChar determines if there is an incomplete UTF-8 character at
-// the end of the given buffer. If so, it sets this.charLength to the byte
-// length that character, and sets this.charReceived to the number of bytes
-// that are available for this character.
-StringDecoder.prototype.detectIncompleteChar = function(buffer) {
-  // determine how many bytes we have to check at the end of this buffer
-  var i = (buffer.length >= 3) ? 3 : buffer.length;
+  // And `num` with `this` in-place
+  BN.prototype.iuand = function iuand (num) {
+    // b = min-length(num, this)
+    var b;
+    if (this.length > num.length) {
+      b = num;
+    } else {
+      b = this;
+    }
 
-  // Figure out if one of the last i bytes of our buffer announces an
-  // incomplete char.
-  for (; i > 0; i--) {
-    var c = buffer[buffer.length - i];
+    for (var i = 0; i < b.length; i++) {
+      this.words[i] = this.words[i] & num.words[i];
+    }
 
-    // See http://en.wikipedia.org/wiki/UTF-8#Description
+    this.length = b.length;
 
-    // 110XXXXX
-    if (i == 1 && c >> 5 == 0x06) {
-      this.charLength = 2;
-      break;
+    return this.strip();
+  };
+
+  BN.prototype.iand = function iand (num) {
+    assert((this.negative | num.negative) === 0);
+    return this.iuand(num);
+  };
+
+  // And `num` with `this`
+  BN.prototype.and = function and (num) {
+    if (this.length > num.length) return this.clone().iand(num);
+    return num.clone().iand(this);
+  };
+
+  BN.prototype.uand = function uand (num) {
+    if (this.length > num.length) return this.clone().iuand(num);
+    return num.clone().iuand(this);
+  };
+
+  // Xor `num` with `this` in-place
+  BN.prototype.iuxor = function iuxor (num) {
+    // a.length > b.length
+    var a;
+    var b;
+    if (this.length > num.length) {
+      a = this;
+      b = num;
+    } else {
+      a = num;
+      b = this;
     }
 
-    // 1110XXXX
-    if (i <= 2 && c >> 4 == 0x0E) {
-      this.charLength = 3;
-      break;
+    for (var i = 0; i < b.length; i++) {
+      this.words[i] = a.words[i] ^ b.words[i];
     }
 
-    // 11110XXX
-    if (i <= 3 && c >> 3 == 0x1E) {
-      this.charLength = 4;
-      break;
+    if (this !== a) {
+      for (; i < a.length; i++) {
+        this.words[i] = a.words[i];
+      }
     }
-  }
-  this.charReceived = i;
-};
 
-StringDecoder.prototype.end = function(buffer) {
-  var res = '';
-  if (buffer && buffer.length)
-    res = this.write(buffer);
+    this.length = a.length;
 
-  if (this.charReceived) {
-    var cr = this.charReceived;
-    var buf = this.charBuffer;
-    var enc = this.encoding;
-    res += buf.slice(0, cr).toString(enc);
-  }
+    return this.strip();
+  };
 
-  return res;
-};
+  BN.prototype.ixor = function ixor (num) {
+    assert((this.negative | num.negative) === 0);
+    return this.iuxor(num);
+  };
 
-function passThroughWrite(buffer) {
-  return buffer.toString(this.encoding);
-}
+  // Xor `num` with `this`
+  BN.prototype.xor = function xor (num) {
+    if (this.length > num.length) return this.clone().ixor(num);
+    return num.clone().ixor(this);
+  };
 
-function utf16DetectIncompleteChar(buffer) {
-  this.charReceived = buffer.length % 2;
-  this.charLength = this.charReceived ? 2 : 0;
-}
+  BN.prototype.uxor = function uxor (num) {
+    if (this.length > num.length) return this.clone().iuxor(num);
+    return num.clone().iuxor(this);
+  };
 
-function base64DetectIncompleteChar(buffer) {
-  this.charReceived = buffer.length % 3;
-  this.charLength = this.charReceived ? 3 : 0;
-}
+  // Not ``this`` with ``width`` bitwidth
+  BN.prototype.inotn = function inotn (width) {
+    assert(typeof width === 'number' && width >= 0);
 
-},{"buffer":7}],28:[function(require,module,exports){
-module.exports = function isBuffer(arg) {
-  return arg && typeof arg === 'object'
-    && typeof arg.copy === 'function'
-    && typeof arg.fill === 'function'
-    && typeof arg.readUInt8 === 'function';
-}
-},{}],29:[function(require,module,exports){
-(function (process,global){
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+    var bytesNeeded = Math.ceil(width / 26) | 0;
+    var bitsLeft = width % 26;
 
-var formatRegExp = /%[sdj%]/g;
-exports.format = function(f) {
-  if (!isString(f)) {
-    var objects = [];
-    for (var i = 0; i < arguments.length; i++) {
-      objects.push(inspect(arguments[i]));
-    }
-    return objects.join(' ');
-  }
+    // Extend the buffer with leading zeroes
+    this._expand(bytesNeeded);
 
-  var i = 1;
-  var args = arguments;
-  var len = args.length;
-  var str = String(f).replace(formatRegExp, function(x) {
-    if (x === '%%') return '%';
-    if (i >= len) return x;
-    switch (x) {
-      case '%s': return String(args[i++]);
-      case '%d': return Number(args[i++]);
-      case '%j':
-        try {
-          return JSON.stringify(args[i++]);
-        } catch (_) {
-          return '[Circular]';
-        }
-      default:
-        return x;
+    if (bitsLeft > 0) {
+      bytesNeeded--;
     }
-  });
-  for (var x = args[i]; i < len; x = args[++i]) {
-    if (isNull(x) || !isObject(x)) {
-      str += ' ' + x;
-    } else {
-      str += ' ' + inspect(x);
+
+    // Handle complete words
+    for (var i = 0; i < bytesNeeded; i++) {
+      this.words[i] = ~this.words[i] & 0x3ffffff;
     }
-  }
-  return str;
-};
 
+    // Handle the residue
+    if (bitsLeft > 0) {
+      this.words[i] = ~this.words[i] & (0x3ffffff >> (26 - bitsLeft));
+    }
 
-// Mark that a method should not be used.
-// Returns a modified function which warns once by default.
-// If --no-deprecation is set, then it is a no-op.
-exports.deprecate = function(fn, msg) {
-  // Allow for deprecating things in the process of starting up.
-  if (isUndefined(global.process)) {
-    return function() {
-      return exports.deprecate(fn, msg).apply(this, arguments);
-    };
-  }
+    // And remove leading zeroes
+    return this.strip();
+  };
 
-  if (process.noDeprecation === true) {
-    return fn;
-  }
+  BN.prototype.notn = function notn (width) {
+    return this.clone().inotn(width);
+  };
 
-  var warned = false;
-  function deprecated() {
-    if (!warned) {
-      if (process.throwDeprecation) {
-        throw new Error(msg);
-      } else if (process.traceDeprecation) {
-        console.trace(msg);
-      } else {
-        console.error(msg);
-      }
-      warned = true;
-    }
-    return fn.apply(this, arguments);
-  }
+  // Set `bit` of `this`
+  BN.prototype.setn = function setn (bit, val) {
+    assert(typeof bit === 'number' && bit >= 0);
 
-  return deprecated;
-};
+    var off = (bit / 26) | 0;
+    var wbit = bit % 26;
 
+    this._expand(off + 1);
 
-var debugs = {};
-var debugEnviron;
-exports.debuglog = function(set) {
-  if (isUndefined(debugEnviron))
-    debugEnviron = process.env.NODE_DEBUG || '';
-  set = set.toUpperCase();
-  if (!debugs[set]) {
-    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
-      var pid = process.pid;
-      debugs[set] = function() {
-        var msg = exports.format.apply(exports, arguments);
-        console.error('%s %d: %s', set, pid, msg);
-      };
+    if (val) {
+      this.words[off] = this.words[off] | (1 << wbit);
     } else {
-      debugs[set] = function() {};
+      this.words[off] = this.words[off] & ~(1 << wbit);
     }
-  }
-  return debugs[set];
-};
 
-
-/**
- * Echos the value of a value. Trys to print the value out
- * in the best way possible given the different types.
- *
- * @param {Object} obj The object to print out.
- * @param {Object} opts Optional options object that alters the output.
- */
-/* legacy: obj, showHidden, depth, colors*/
-function inspect(obj, opts) {
-  // default options
-  var ctx = {
-    seen: [],
-    stylize: stylizeNoColor
+    return this.strip();
   };
-  // legacy...
-  if (arguments.length >= 3) ctx.depth = arguments[2];
-  if (arguments.length >= 4) ctx.colors = arguments[3];
-  if (isBoolean(opts)) {
-    // legacy...
-    ctx.showHidden = opts;
-  } else if (opts) {
-    // got an "options" object
-    exports._extend(ctx, opts);
-  }
-  // set default options
-  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
-  if (isUndefined(ctx.depth)) ctx.depth = 2;
-  if (isUndefined(ctx.colors)) ctx.colors = false;
-  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
-  if (ctx.colors) ctx.stylize = stylizeWithColor;
-  return formatValue(ctx, obj, ctx.depth);
-}
-exports.inspect = inspect;
 
+  // Add `num` to `this` in-place
+  BN.prototype.iadd = function iadd (num) {
+    var r;
+
+    // negative + positive
+    if (this.negative !== 0 && num.negative === 0) {
+      this.negative = 0;
+      r = this.isub(num);
+      this.negative ^= 1;
+      return this._normSign();
+
+    // positive + negative
+    } else if (this.negative === 0 && num.negative !== 0) {
+      num.negative = 0;
+      r = this.isub(num);
+      num.negative = 1;
+      return r._normSign();
+    }
+
+    // a.length > b.length
+    var a, b;
+    if (this.length > num.length) {
+      a = this;
+      b = num;
+    } else {
+      a = num;
+      b = this;
+    }
+
+    var carry = 0;
+    for (var i = 0; i < b.length; i++) {
+      r = (a.words[i] | 0) + (b.words[i] | 0) + carry;
+      this.words[i] = r & 0x3ffffff;
+      carry = r >>> 26;
+    }
+    for (; carry !== 0 && i < a.length; i++) {
+      r = (a.words[i] | 0) + carry;
+      this.words[i] = r & 0x3ffffff;
+      carry = r >>> 26;
+    }
+
+    this.length = a.length;
+    if (carry !== 0) {
+      this.words[this.length] = carry;
+      this.length++;
+    // Copy the rest of the words
+    } else if (a !== this) {
+      for (; i < a.length; i++) {
+        this.words[i] = a.words[i];
+      }
+    }
 
-// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
-inspect.colors = {
-  'bold' : [1, 22],
-  'italic' : [3, 23],
-  'underline' : [4, 24],
-  'inverse' : [7, 27],
-  'white' : [37, 39],
-  'grey' : [90, 39],
-  'black' : [30, 39],
-  'blue' : [34, 39],
-  'cyan' : [36, 39],
-  'green' : [32, 39],
-  'magenta' : [35, 39],
-  'red' : [31, 39],
-  'yellow' : [33, 39]
-};
+    return this;
+  };
 
-// Don't use 'blue' not visible on cmd.exe
-inspect.styles = {
-  'special': 'cyan',
-  'number': 'yellow',
-  'boolean': 'yellow',
-  'undefined': 'grey',
-  'null': 'bold',
-  'string': 'green',
-  'date': 'magenta',
-  // "name": intentionally not styling
-  'regexp': 'red'
-};
+  // Add `num` to `this`
+  BN.prototype.add = function add (num) {
+    var res;
+    if (num.negative !== 0 && this.negative === 0) {
+      num.negative = 0;
+      res = this.sub(num);
+      num.negative ^= 1;
+      return res;
+    } else if (num.negative === 0 && this.negative !== 0) {
+      this.negative = 0;
+      res = num.sub(this);
+      this.negative = 1;
+      return res;
+    }
 
+    if (this.length > num.length) return this.clone().iadd(num);
 
-function stylizeWithColor(str, styleType) {
-  var style = inspect.styles[styleType];
+    return num.clone().iadd(this);
+  };
 
-  if (style) {
-    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
-           '\u001b[' + inspect.colors[style][1] + 'm';
-  } else {
-    return str;
-  }
-}
+  // Subtract `num` from `this` in-place
+  BN.prototype.isub = function isub (num) {
+    // this - (-num) = this + num
+    if (num.negative !== 0) {
+      num.negative = 0;
+      var r = this.iadd(num);
+      num.negative = 1;
+      return r._normSign();
+
+    // -this - num = -(this + num)
+    } else if (this.negative !== 0) {
+      this.negative = 0;
+      this.iadd(num);
+      this.negative = 1;
+      return this._normSign();
+    }
+
+    // At this point both numbers are positive
+    var cmp = this.cmp(num);
+
+    // Optimization - zeroify
+    if (cmp === 0) {
+      this.negative = 0;
+      this.length = 1;
+      this.words[0] = 0;
+      return this;
+    }
+
+    // a > b
+    var a, b;
+    if (cmp > 0) {
+      a = this;
+      b = num;
+    } else {
+      a = num;
+      b = this;
+    }
 
+    var carry = 0;
+    for (var i = 0; i < b.length; i++) {
+      r = (a.words[i] | 0) - (b.words[i] | 0) + carry;
+      carry = r >> 26;
+      this.words[i] = r & 0x3ffffff;
+    }
+    for (; carry !== 0 && i < a.length; i++) {
+      r = (a.words[i] | 0) + carry;
+      carry = r >> 26;
+      this.words[i] = r & 0x3ffffff;
+    }
 
-function stylizeNoColor(str, styleType) {
-  return str;
-}
+    // Copy rest of the words
+    if (carry === 0 && i < a.length && a !== this) {
+      for (; i < a.length; i++) {
+        this.words[i] = a.words[i];
+      }
+    }
 
+    this.length = Math.max(this.length, i);
 
-function arrayToHash(array) {
-  var hash = {};
+    if (a !== this) {
+      this.negative = 1;
+    }
 
-  array.forEach(function(val, idx) {
-    hash[val] = true;
-  });
+    return this.strip();
+  };
 
-  return hash;
-}
+  // Subtract `num` from `this`
+  BN.prototype.sub = function sub (num) {
+    return this.clone().isub(num);
+  };
 
+  function smallMulTo (self, num, out) {
+    out.negative = num.negative ^ self.negative;
+    var len = (self.length + num.length) | 0;
+    out.length = len;
+    len = (len - 1) | 0;
+
+    // Peel one iteration (compiler can't do it, because of code complexity)
+    var a = self.words[0] | 0;
+    var b = num.words[0] | 0;
+    var r = a * b;
+
+    var lo = r & 0x3ffffff;
+    var carry = (r / 0x4000000) | 0;
+    out.words[0] = lo;
+
+    for (var k = 1; k < len; k++) {
+      // Sum all words with the same `i + j = k` and accumulate `ncarry`,
+      // note that ncarry could be >= 0x3ffffff
+      var ncarry = carry >>> 26;
+      var rword = carry & 0x3ffffff;
+      var maxJ = Math.min(k, num.length - 1);
+      for (var j = Math.max(0, k - self.length + 1); j <= maxJ; j++) {
+        var i = (k - j) | 0;
+        a = self.words[i] | 0;
+        b = num.words[j] | 0;
+        r = a * b + rword;
+        ncarry += (r / 0x4000000) | 0;
+        rword = r & 0x3ffffff;
+      }
+      out.words[k] = rword | 0;
+      carry = ncarry | 0;
+    }
+    if (carry !== 0) {
+      out.words[k] = carry | 0;
+    } else {
+      out.length--;
+    }
+
+    return out.strip();
+  }
+
+  // TODO(indutny): it may be reasonable to omit it for users who don't need
+  // to work with 256-bit numbers, otherwise it gives 20% improvement for 256-bit
+  // multiplication (like elliptic secp256k1).
+  var comb10MulTo = function comb10MulTo (self, num, out) {
+    var a = self.words;
+    var b = num.words;
+    var o = out.words;
+    var c = 0;
+    var lo;
+    var mid;
+    var hi;
+    var a0 = a[0] | 0;
+    var al0 = a0 & 0x1fff;
+    var ah0 = a0 >>> 13;
+    var a1 = a[1] | 0;
+    var al1 = a1 & 0x1fff;
+    var ah1 = a1 >>> 13;
+    var a2 = a[2] | 0;
+    var al2 = a2 & 0x1fff;
+    var ah2 = a2 >>> 13;
+    var a3 = a[3] | 0;
+    var al3 = a3 & 0x1fff;
+    var ah3 = a3 >>> 13;
+    var a4 = a[4] | 0;
+    var al4 = a4 & 0x1fff;
+    var ah4 = a4 >>> 13;
+    var a5 = a[5] | 0;
+    var al5 = a5 & 0x1fff;
+    var ah5 = a5 >>> 13;
+    var a6 = a[6] | 0;
+    var al6 = a6 & 0x1fff;
+    var ah6 = a6 >>> 13;
+    var a7 = a[7] | 0;
+    var al7 = a7 & 0x1fff;
+    var ah7 = a7 >>> 13;
+    var a8 = a[8] | 0;
+    var al8 = a8 & 0x1fff;
+    var ah8 = a8 >>> 13;
+    var a9 = a[9] | 0;
+    var al9 = a9 & 0x1fff;
+    var ah9 = a9 >>> 13;
+    var b0 = b[0] | 0;
+    var bl0 = b0 & 0x1fff;
+    var bh0 = b0 >>> 13;
+    var b1 = b[1] | 0;
+    var bl1 = b1 & 0x1fff;
+    var bh1 = b1 >>> 13;
+    var b2 = b[2] | 0;
+    var bl2 = b2 & 0x1fff;
+    var bh2 = b2 >>> 13;
+    var b3 = b[3] | 0;
+    var bl3 = b3 & 0x1fff;
+    var bh3 = b3 >>> 13;
+    var b4 = b[4] | 0;
+    var bl4 = b4 & 0x1fff;
+    var bh4 = b4 >>> 13;
+    var b5 = b[5] | 0;
+    var bl5 = b5 & 0x1fff;
+    var bh5 = b5 >>> 13;
+    var b6 = b[6] | 0;
+    var bl6 = b6 & 0x1fff;
+    var bh6 = b6 >>> 13;
+    var b7 = b[7] | 0;
+    var bl7 = b7 & 0x1fff;
+    var bh7 = b7 >>> 13;
+    var b8 = b[8] | 0;
+    var bl8 = b8 & 0x1fff;
+    var bh8 = b8 >>> 13;
+    var b9 = b[9] | 0;
+    var bl9 = b9 & 0x1fff;
+    var bh9 = b9 >>> 13;
+
+    out.negative = self.negative ^ num.negative;
+    out.length = 19;
+    /* k = 0 */
+    lo = Math.imul(al0, bl0);
+    mid = Math.imul(al0, bh0);
+    mid = (mid + Math.imul(ah0, bl0)) | 0;
+    hi = Math.imul(ah0, bh0);
+    var w0 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w0 >>> 26)) | 0;
+    w0 &= 0x3ffffff;
+    /* k = 1 */
+    lo = Math.imul(al1, bl0);
+    mid = Math.imul(al1, bh0);
+    mid = (mid + Math.imul(ah1, bl0)) | 0;
+    hi = Math.imul(ah1, bh0);
+    lo = (lo + Math.imul(al0, bl1)) | 0;
+    mid = (mid + Math.imul(al0, bh1)) | 0;
+    mid = (mid + Math.imul(ah0, bl1)) | 0;
+    hi = (hi + Math.imul(ah0, bh1)) | 0;
+    var w1 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w1 >>> 26)) | 0;
+    w1 &= 0x3ffffff;
+    /* k = 2 */
+    lo = Math.imul(al2, bl0);
+    mid = Math.imul(al2, bh0);
+    mid = (mid + Math.imul(ah2, bl0)) | 0;
+    hi = Math.imul(ah2, bh0);
+    lo = (lo + Math.imul(al1, bl1)) | 0;
+    mid = (mid + Math.imul(al1, bh1)) | 0;
+    mid = (mid + Math.imul(ah1, bl1)) | 0;
+    hi = (hi + Math.imul(ah1, bh1)) | 0;
+    lo = (lo + Math.imul(al0, bl2)) | 0;
+    mid = (mid + Math.imul(al0, bh2)) | 0;
+    mid = (mid + Math.imul(ah0, bl2)) | 0;
+    hi = (hi + Math.imul(ah0, bh2)) | 0;
+    var w2 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w2 >>> 26)) | 0;
+    w2 &= 0x3ffffff;
+    /* k = 3 */
+    lo = Math.imul(al3, bl0);
+    mid = Math.imul(al3, bh0);
+    mid = (mid + Math.imul(ah3, bl0)) | 0;
+    hi = Math.imul(ah3, bh0);
+    lo = (lo + Math.imul(al2, bl1)) | 0;
+    mid = (mid + Math.imul(al2, bh1)) | 0;
+    mid = (mid + Math.imul(ah2, bl1)) | 0;
+    hi = (hi + Math.imul(ah2, bh1)) | 0;
+    lo = (lo + Math.imul(al1, bl2)) | 0;
+    mid = (mid + Math.imul(al1, bh2)) | 0;
+    mid = (mid + Math.imul(ah1, bl2)) | 0;
+    hi = (hi + Math.imul(ah1, bh2)) | 0;
+    lo = (lo + Math.imul(al0, bl3)) | 0;
+    mid = (mid + Math.imul(al0, bh3)) | 0;
+    mid = (mid + Math.imul(ah0, bl3)) | 0;
+    hi = (hi + Math.imul(ah0, bh3)) | 0;
+    var w3 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w3 >>> 26)) | 0;
+    w3 &= 0x3ffffff;
+    /* k = 4 */
+    lo = Math.imul(al4, bl0);
+    mid = Math.imul(al4, bh0);
+    mid = (mid + Math.imul(ah4, bl0)) | 0;
+    hi = Math.imul(ah4, bh0);
+    lo = (lo + Math.imul(al3, bl1)) | 0;
+    mid = (mid + Math.imul(al3, bh1)) | 0;
+    mid = (mid + Math.imul(ah3, bl1)) | 0;
+    hi = (hi + Math.imul(ah3, bh1)) | 0;
+    lo = (lo + Math.imul(al2, bl2)) | 0;
+    mid = (mid + Math.imul(al2, bh2)) | 0;
+    mid = (mid + Math.imul(ah2, bl2)) | 0;
+    hi = (hi + Math.imul(ah2, bh2)) | 0;
+    lo = (lo + Math.imul(al1, bl3)) | 0;
+    mid = (mid + Math.imul(al1, bh3)) | 0;
+    mid = (mid + Math.imul(ah1, bl3)) | 0;
+    hi = (hi + Math.imul(ah1, bh3)) | 0;
+    lo = (lo + Math.imul(al0, bl4)) | 0;
+    mid = (mid + Math.imul(al0, bh4)) | 0;
+    mid = (mid + Math.imul(ah0, bl4)) | 0;
+    hi = (hi + Math.imul(ah0, bh4)) | 0;
+    var w4 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w4 >>> 26)) | 0;
+    w4 &= 0x3ffffff;
+    /* k = 5 */
+    lo = Math.imul(al5, bl0);
+    mid = Math.imul(al5, bh0);
+    mid = (mid + Math.imul(ah5, bl0)) | 0;
+    hi = Math.imul(ah5, bh0);
+    lo = (lo + Math.imul(al4, bl1)) | 0;
+    mid = (mid + Math.imul(al4, bh1)) | 0;
+    mid = (mid + Math.imul(ah4, bl1)) | 0;
+    hi = (hi + Math.imul(ah4, bh1)) | 0;
+    lo = (lo + Math.imul(al3, bl2)) | 0;
+    mid = (mid + Math.imul(al3, bh2)) | 0;
+    mid = (mid + Math.imul(ah3, bl2)) | 0;
+    hi = (hi + Math.imul(ah3, bh2)) | 0;
+    lo = (lo + Math.imul(al2, bl3)) | 0;
+    mid = (mid + Math.imul(al2, bh3)) | 0;
+    mid = (mid + Math.imul(ah2, bl3)) | 0;
+    hi = (hi + Math.imul(ah2, bh3)) | 0;
+    lo = (lo + Math.imul(al1, bl4)) | 0;
+    mid = (mid + Math.imul(al1, bh4)) | 0;
+    mid = (mid + Math.imul(ah1, bl4)) | 0;
+    hi = (hi + Math.imul(ah1, bh4)) | 0;
+    lo = (lo + Math.imul(al0, bl5)) | 0;
+    mid = (mid + Math.imul(al0, bh5)) | 0;
+    mid = (mid + Math.imul(ah0, bl5)) | 0;
+    hi = (hi + Math.imul(ah0, bh5)) | 0;
+    var w5 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w5 >>> 26)) | 0;
+    w5 &= 0x3ffffff;
+    /* k = 6 */
+    lo = Math.imul(al6, bl0);
+    mid = Math.imul(al6, bh0);
+    mid = (mid + Math.imul(ah6, bl0)) | 0;
+    hi = Math.imul(ah6, bh0);
+    lo = (lo + Math.imul(al5, bl1)) | 0;
+    mid = (mid + Math.imul(al5, bh1)) | 0;
+    mid = (mid + Math.imul(ah5, bl1)) | 0;
+    hi = (hi + Math.imul(ah5, bh1)) | 0;
+    lo = (lo + Math.imul(al4, bl2)) | 0;
+    mid = (mid + Math.imul(al4, bh2)) | 0;
+    mid = (mid + Math.imul(ah4, bl2)) | 0;
+    hi = (hi + Math.imul(ah4, bh2)) | 0;
+    lo = (lo + Math.imul(al3, bl3)) | 0;
+    mid = (mid + Math.imul(al3, bh3)) | 0;
+    mid = (mid + Math.imul(ah3, bl3)) | 0;
+    hi = (hi + Math.imul(ah3, bh3)) | 0;
+    lo = (lo + Math.imul(al2, bl4)) | 0;
+    mid = (mid + Math.imul(al2, bh4)) | 0;
+    mid = (mid + Math.imul(ah2, bl4)) | 0;
+    hi = (hi + Math.imul(ah2, bh4)) | 0;
+    lo = (lo + Math.imul(al1, bl5)) | 0;
+    mid = (mid + Math.imul(al1, bh5)) | 0;
+    mid = (mid + Math.imul(ah1, bl5)) | 0;
+    hi = (hi + Math.imul(ah1, bh5)) | 0;
+    lo = (lo + Math.imul(al0, bl6)) | 0;
+    mid = (mid + Math.imul(al0, bh6)) | 0;
+    mid = (mid + Math.imul(ah0, bl6)) | 0;
+    hi = (hi + Math.imul(ah0, bh6)) | 0;
+    var w6 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w6 >>> 26)) | 0;
+    w6 &= 0x3ffffff;
+    /* k = 7 */
+    lo = Math.imul(al7, bl0);
+    mid = Math.imul(al7, bh0);
+    mid = (mid + Math.imul(ah7, bl0)) | 0;
+    hi = Math.imul(ah7, bh0);
+    lo = (lo + Math.imul(al6, bl1)) | 0;
+    mid = (mid + Math.imul(al6, bh1)) | 0;
+    mid = (mid + Math.imul(ah6, bl1)) | 0;
+    hi = (hi + Math.imul(ah6, bh1)) | 0;
+    lo = (lo + Math.imul(al5, bl2)) | 0;
+    mid = (mid + Math.imul(al5, bh2)) | 0;
+    mid = (mid + Math.imul(ah5, bl2)) | 0;
+    hi = (hi + Math.imul(ah5, bh2)) | 0;
+    lo = (lo + Math.imul(al4, bl3)) | 0;
+    mid = (mid + Math.imul(al4, bh3)) | 0;
+    mid = (mid + Math.imul(ah4, bl3)) | 0;
+    hi = (hi + Math.imul(ah4, bh3)) | 0;
+    lo = (lo + Math.imul(al3, bl4)) | 0;
+    mid = (mid + Math.imul(al3, bh4)) | 0;
+    mid = (mid + Math.imul(ah3, bl4)) | 0;
+    hi = (hi + Math.imul(ah3, bh4)) | 0;
+    lo = (lo + Math.imul(al2, bl5)) | 0;
+    mid = (mid + Math.imul(al2, bh5)) | 0;
+    mid = (mid + Math.imul(ah2, bl5)) | 0;
+    hi = (hi + Math.imul(ah2, bh5)) | 0;
+    lo = (lo + Math.imul(al1, bl6)) | 0;
+    mid = (mid + Math.imul(al1, bh6)) | 0;
+    mid = (mid + Math.imul(ah1, bl6)) | 0;
+    hi = (hi + Math.imul(ah1, bh6)) | 0;
+    lo = (lo + Math.imul(al0, bl7)) | 0;
+    mid = (mid + Math.imul(al0, bh7)) | 0;
+    mid = (mid + Math.imul(ah0, bl7)) | 0;
+    hi = (hi + Math.imul(ah0, bh7)) | 0;
+    var w7 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w7 >>> 26)) | 0;
+    w7 &= 0x3ffffff;
+    /* k = 8 */
+    lo = Math.imul(al8, bl0);
+    mid = Math.imul(al8, bh0);
+    mid = (mid + Math.imul(ah8, bl0)) | 0;
+    hi = Math.imul(ah8, bh0);
+    lo = (lo + Math.imul(al7, bl1)) | 0;
+    mid = (mid + Math.imul(al7, bh1)) | 0;
+    mid = (mid + Math.imul(ah7, bl1)) | 0;
+    hi = (hi + Math.imul(ah7, bh1)) | 0;
+    lo = (lo + Math.imul(al6, bl2)) | 0;
+    mid = (mid + Math.imul(al6, bh2)) | 0;
+    mid = (mid + Math.imul(ah6, bl2)) | 0;
+    hi = (hi + Math.imul(ah6, bh2)) | 0;
+    lo = (lo + Math.imul(al5, bl3)) | 0;
+    mid = (mid + Math.imul(al5, bh3)) | 0;
+    mid = (mid + Math.imul(ah5, bl3)) | 0;
+    hi = (hi + Math.imul(ah5, bh3)) | 0;
+    lo = (lo + Math.imul(al4, bl4)) | 0;
+    mid = (mid + Math.imul(al4, bh4)) | 0;
+    mid = (mid + Math.imul(ah4, bl4)) | 0;
+    hi = (hi + Math.imul(ah4, bh4)) | 0;
+    lo = (lo + Math.imul(al3, bl5)) | 0;
+    mid = (mid + Math.imul(al3, bh5)) | 0;
+    mid = (mid + Math.imul(ah3, bl5)) | 0;
+    hi = (hi + Math.imul(ah3, bh5)) | 0;
+    lo = (lo + Math.imul(al2, bl6)) | 0;
+    mid = (mid + Math.imul(al2, bh6)) | 0;
+    mid = (mid + Math.imul(ah2, bl6)) | 0;
+    hi = (hi + Math.imul(ah2, bh6)) | 0;
+    lo = (lo + Math.imul(al1, bl7)) | 0;
+    mid = (mid + Math.imul(al1, bh7)) | 0;
+    mid = (mid + Math.imul(ah1, bl7)) | 0;
+    hi = (hi + Math.imul(ah1, bh7)) | 0;
+    lo = (lo + Math.imul(al0, bl8)) | 0;
+    mid = (mid + Math.imul(al0, bh8)) | 0;
+    mid = (mid + Math.imul(ah0, bl8)) | 0;
+    hi = (hi + Math.imul(ah0, bh8)) | 0;
+    var w8 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w8 >>> 26)) | 0;
+    w8 &= 0x3ffffff;
+    /* k = 9 */
+    lo = Math.imul(al9, bl0);
+    mid = Math.imul(al9, bh0);
+    mid = (mid + Math.imul(ah9, bl0)) | 0;
+    hi = Math.imul(ah9, bh0);
+    lo = (lo + Math.imul(al8, bl1)) | 0;
+    mid = (mid + Math.imul(al8, bh1)) | 0;
+    mid = (mid + Math.imul(ah8, bl1)) | 0;
+    hi = (hi + Math.imul(ah8, bh1)) | 0;
+    lo = (lo + Math.imul(al7, bl2)) | 0;
+    mid = (mid + Math.imul(al7, bh2)) | 0;
+    mid = (mid + Math.imul(ah7, bl2)) | 0;
+    hi = (hi + Math.imul(ah7, bh2)) | 0;
+    lo = (lo + Math.imul(al6, bl3)) | 0;
+    mid = (mid + Math.imul(al6, bh3)) | 0;
+    mid = (mid + Math.imul(ah6, bl3)) | 0;
+    hi = (hi + Math.imul(ah6, bh3)) | 0;
+    lo = (lo + Math.imul(al5, bl4)) | 0;
+    mid = (mid + Math.imul(al5, bh4)) | 0;
+    mid = (mid + Math.imul(ah5, bl4)) | 0;
+    hi = (hi + Math.imul(ah5, bh4)) | 0;
+    lo = (lo + Math.imul(al4, bl5)) | 0;
+    mid = (mid + Math.imul(al4, bh5)) | 0;
+    mid = (mid + Math.imul(ah4, bl5)) | 0;
+    hi = (hi + Math.imul(ah4, bh5)) | 0;
+    lo = (lo + Math.imul(al3, bl6)) | 0;
+    mid = (mid + Math.imul(al3, bh6)) | 0;
+    mid = (mid + Math.imul(ah3, bl6)) | 0;
+    hi = (hi + Math.imul(ah3, bh6)) | 0;
+    lo = (lo + Math.imul(al2, bl7)) | 0;
+    mid = (mid + Math.imul(al2, bh7)) | 0;
+    mid = (mid + Math.imul(ah2, bl7)) | 0;
+    hi = (hi + Math.imul(ah2, bh7)) | 0;
+    lo = (lo + Math.imul(al1, bl8)) | 0;
+    mid = (mid + Math.imul(al1, bh8)) | 0;
+    mid = (mid + Math.imul(ah1, bl8)) | 0;
+    hi = (hi + Math.imul(ah1, bh8)) | 0;
+    lo = (lo + Math.imul(al0, bl9)) | 0;
+    mid = (mid + Math.imul(al0, bh9)) | 0;
+    mid = (mid + Math.imul(ah0, bl9)) | 0;
+    hi = (hi + Math.imul(ah0, bh9)) | 0;
+    var w9 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w9 >>> 26)) | 0;
+    w9 &= 0x3ffffff;
+    /* k = 10 */
+    lo = Math.imul(al9, bl1);
+    mid = Math.imul(al9, bh1);
+    mid = (mid + Math.imul(ah9, bl1)) | 0;
+    hi = Math.imul(ah9, bh1);
+    lo = (lo + Math.imul(al8, bl2)) | 0;
+    mid = (mid + Math.imul(al8, bh2)) | 0;
+    mid = (mid + Math.imul(ah8, bl2)) | 0;
+    hi = (hi + Math.imul(ah8, bh2)) | 0;
+    lo = (lo + Math.imul(al7, bl3)) | 0;
+    mid = (mid + Math.imul(al7, bh3)) | 0;
+    mid = (mid + Math.imul(ah7, bl3)) | 0;
+    hi = (hi + Math.imul(ah7, bh3)) | 0;
+    lo = (lo + Math.imul(al6, bl4)) | 0;
+    mid = (mid + Math.imul(al6, bh4)) | 0;
+    mid = (mid + Math.imul(ah6, bl4)) | 0;
+    hi = (hi + Math.imul(ah6, bh4)) | 0;
+    lo = (lo + Math.imul(al5, bl5)) | 0;
+    mid = (mid + Math.imul(al5, bh5)) | 0;
+    mid = (mid + Math.imul(ah5, bl5)) | 0;
+    hi = (hi + Math.imul(ah5, bh5)) | 0;
+    lo = (lo + Math.imul(al4, bl6)) | 0;
+    mid = (mid + Math.imul(al4, bh6)) | 0;
+    mid = (mid + Math.imul(ah4, bl6)) | 0;
+    hi = (hi + Math.imul(ah4, bh6)) | 0;
+    lo = (lo + Math.imul(al3, bl7)) | 0;
+    mid = (mid + Math.imul(al3, bh7)) | 0;
+    mid = (mid + Math.imul(ah3, bl7)) | 0;
+    hi = (hi + Math.imul(ah3, bh7)) | 0;
+    lo = (lo + Math.imul(al2, bl8)) | 0;
+    mid = (mid + Math.imul(al2, bh8)) | 0;
+    mid = (mid + Math.imul(ah2, bl8)) | 0;
+    hi = (hi + Math.imul(ah2, bh8)) | 0;
+    lo = (lo + Math.imul(al1, bl9)) | 0;
+    mid = (mid + Math.imul(al1, bh9)) | 0;
+    mid = (mid + Math.imul(ah1, bl9)) | 0;
+    hi = (hi + Math.imul(ah1, bh9)) | 0;
+    var w10 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w10 >>> 26)) | 0;
+    w10 &= 0x3ffffff;
+    /* k = 11 */
+    lo = Math.imul(al9, bl2);
+    mid = Math.imul(al9, bh2);
+    mid = (mid + Math.imul(ah9, bl2)) | 0;
+    hi = Math.imul(ah9, bh2);
+    lo = (lo + Math.imul(al8, bl3)) | 0;
+    mid = (mid + Math.imul(al8, bh3)) | 0;
+    mid = (mid + Math.imul(ah8, bl3)) | 0;
+    hi = (hi + Math.imul(ah8, bh3)) | 0;
+    lo = (lo + Math.imul(al7, bl4)) | 0;
+    mid = (mid + Math.imul(al7, bh4)) | 0;
+    mid = (mid + Math.imul(ah7, bl4)) | 0;
+    hi = (hi + Math.imul(ah7, bh4)) | 0;
+    lo = (lo + Math.imul(al6, bl5)) | 0;
+    mid = (mid + Math.imul(al6, bh5)) | 0;
+    mid = (mid + Math.imul(ah6, bl5)) | 0;
+    hi = (hi + Math.imul(ah6, bh5)) | 0;
+    lo = (lo + Math.imul(al5, bl6)) | 0;
+    mid = (mid + Math.imul(al5, bh6)) | 0;
+    mid = (mid + Math.imul(ah5, bl6)) | 0;
+    hi = (hi + Math.imul(ah5, bh6)) | 0;
+    lo = (lo + Math.imul(al4, bl7)) | 0;
+    mid = (mid + Math.imul(al4, bh7)) | 0;
+    mid = (mid + Math.imul(ah4, bl7)) | 0;
+    hi = (hi + Math.imul(ah4, bh7)) | 0;
+    lo = (lo + Math.imul(al3, bl8)) | 0;
+    mid = (mid + Math.imul(al3, bh8)) | 0;
+    mid = (mid + Math.imul(ah3, bl8)) | 0;
+    hi = (hi + Math.imul(ah3, bh8)) | 0;
+    lo = (lo + Math.imul(al2, bl9)) | 0;
+    mid = (mid + Math.imul(al2, bh9)) | 0;
+    mid = (mid + Math.imul(ah2, bl9)) | 0;
+    hi = (hi + Math.imul(ah2, bh9)) | 0;
+    var w11 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w11 >>> 26)) | 0;
+    w11 &= 0x3ffffff;
+    /* k = 12 */
+    lo = Math.imul(al9, bl3);
+    mid = Math.imul(al9, bh3);
+    mid = (mid + Math.imul(ah9, bl3)) | 0;
+    hi = Math.imul(ah9, bh3);
+    lo = (lo + Math.imul(al8, bl4)) | 0;
+    mid = (mid + Math.imul(al8, bh4)) | 0;
+    mid = (mid + Math.imul(ah8, bl4)) | 0;
+    hi = (hi + Math.imul(ah8, bh4)) | 0;
+    lo = (lo + Math.imul(al7, bl5)) | 0;
+    mid = (mid + Math.imul(al7, bh5)) | 0;
+    mid = (mid + Math.imul(ah7, bl5)) | 0;
+    hi = (hi + Math.imul(ah7, bh5)) | 0;
+    lo = (lo + Math.imul(al6, bl6)) | 0;
+    mid = (mid + Math.imul(al6, bh6)) | 0;
+    mid = (mid + Math.imul(ah6, bl6)) | 0;
+    hi = (hi + Math.imul(ah6, bh6)) | 0;
+    lo = (lo + Math.imul(al5, bl7)) | 0;
+    mid = (mid + Math.imul(al5, bh7)) | 0;
+    mid = (mid + Math.imul(ah5, bl7)) | 0;
+    hi = (hi + Math.imul(ah5, bh7)) | 0;
+    lo = (lo + Math.imul(al4, bl8)) | 0;
+    mid = (mid + Math.imul(al4, bh8)) | 0;
+    mid = (mid + Math.imul(ah4, bl8)) | 0;
+    hi = (hi + Math.imul(ah4, bh8)) | 0;
+    lo = (lo + Math.imul(al3, bl9)) | 0;
+    mid = (mid + Math.imul(al3, bh9)) | 0;
+    mid = (mid + Math.imul(ah3, bl9)) | 0;
+    hi = (hi + Math.imul(ah3, bh9)) | 0;
+    var w12 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w12 >>> 26)) | 0;
+    w12 &= 0x3ffffff;
+    /* k = 13 */
+    lo = Math.imul(al9, bl4);
+    mid = Math.imul(al9, bh4);
+    mid = (mid + Math.imul(ah9, bl4)) | 0;
+    hi = Math.imul(ah9, bh4);
+    lo = (lo + Math.imul(al8, bl5)) | 0;
+    mid = (mid + Math.imul(al8, bh5)) | 0;
+    mid = (mid + Math.imul(ah8, bl5)) | 0;
+    hi = (hi + Math.imul(ah8, bh5)) | 0;
+    lo = (lo + Math.imul(al7, bl6)) | 0;
+    mid = (mid + Math.imul(al7, bh6)) | 0;
+    mid = (mid + Math.imul(ah7, bl6)) | 0;
+    hi = (hi + Math.imul(ah7, bh6)) | 0;
+    lo = (lo + Math.imul(al6, bl7)) | 0;
+    mid = (mid + Math.imul(al6, bh7)) | 0;
+    mid = (mid + Math.imul(ah6, bl7)) | 0;
+    hi = (hi + Math.imul(ah6, bh7)) | 0;
+    lo = (lo + Math.imul(al5, bl8)) | 0;
+    mid = (mid + Math.imul(al5, bh8)) | 0;
+    mid = (mid + Math.imul(ah5, bl8)) | 0;
+    hi = (hi + Math.imul(ah5, bh8)) | 0;
+    lo = (lo + Math.imul(al4, bl9)) | 0;
+    mid = (mid + Math.imul(al4, bh9)) | 0;
+    mid = (mid + Math.imul(ah4, bl9)) | 0;
+    hi = (hi + Math.imul(ah4, bh9)) | 0;
+    var w13 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w13 >>> 26)) | 0;
+    w13 &= 0x3ffffff;
+    /* k = 14 */
+    lo = Math.imul(al9, bl5);
+    mid = Math.imul(al9, bh5);
+    mid = (mid + Math.imul(ah9, bl5)) | 0;
+    hi = Math.imul(ah9, bh5);
+    lo = (lo + Math.imul(al8, bl6)) | 0;
+    mid = (mid + Math.imul(al8, bh6)) | 0;
+    mid = (mid + Math.imul(ah8, bl6)) | 0;
+    hi = (hi + Math.imul(ah8, bh6)) | 0;
+    lo = (lo + Math.imul(al7, bl7)) | 0;
+    mid = (mid + Math.imul(al7, bh7)) | 0;
+    mid = (mid + Math.imul(ah7, bl7)) | 0;
+    hi = (hi + Math.imul(ah7, bh7)) | 0;
+    lo = (lo + Math.imul(al6, bl8)) | 0;
+    mid = (mid + Math.imul(al6, bh8)) | 0;
+    mid = (mid + Math.imul(ah6, bl8)) | 0;
+    hi = (hi + Math.imul(ah6, bh8)) | 0;
+    lo = (lo + Math.imul(al5, bl9)) | 0;
+    mid = (mid + Math.imul(al5, bh9)) | 0;
+    mid = (mid + Math.imul(ah5, bl9)) | 0;
+    hi = (hi + Math.imul(ah5, bh9)) | 0;
+    var w14 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w14 >>> 26)) | 0;
+    w14 &= 0x3ffffff;
+    /* k = 15 */
+    lo = Math.imul(al9, bl6);
+    mid = Math.imul(al9, bh6);
+    mid = (mid + Math.imul(ah9, bl6)) | 0;
+    hi = Math.imul(ah9, bh6);
+    lo = (lo + Math.imul(al8, bl7)) | 0;
+    mid = (mid + Math.imul(al8, bh7)) | 0;
+    mid = (mid + Math.imul(ah8, bl7)) | 0;
+    hi = (hi + Math.imul(ah8, bh7)) | 0;
+    lo = (lo + Math.imul(al7, bl8)) | 0;
+    mid = (mid + Math.imul(al7, bh8)) | 0;
+    mid = (mid + Math.imul(ah7, bl8)) | 0;
+    hi = (hi + Math.imul(ah7, bh8)) | 0;
+    lo = (lo + Math.imul(al6, bl9)) | 0;
+    mid = (mid + Math.imul(al6, bh9)) | 0;
+    mid = (mid + Math.imul(ah6, bl9)) | 0;
+    hi = (hi + Math.imul(ah6, bh9)) | 0;
+    var w15 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w15 >>> 26)) | 0;
+    w15 &= 0x3ffffff;
+    /* k = 16 */
+    lo = Math.imul(al9, bl7);
+    mid = Math.imul(al9, bh7);
+    mid = (mid + Math.imul(ah9, bl7)) | 0;
+    hi = Math.imul(ah9, bh7);
+    lo = (lo + Math.imul(al8, bl8)) | 0;
+    mid = (mid + Math.imul(al8, bh8)) | 0;
+    mid = (mid + Math.imul(ah8, bl8)) | 0;
+    hi = (hi + Math.imul(ah8, bh8)) | 0;
+    lo = (lo + Math.imul(al7, bl9)) | 0;
+    mid = (mid + Math.imul(al7, bh9)) | 0;
+    mid = (mid + Math.imul(ah7, bl9)) | 0;
+    hi = (hi + Math.imul(ah7, bh9)) | 0;
+    var w16 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w16 >>> 26)) | 0;
+    w16 &= 0x3ffffff;
+    /* k = 17 */
+    lo = Math.imul(al9, bl8);
+    mid = Math.imul(al9, bh8);
+    mid = (mid + Math.imul(ah9, bl8)) | 0;
+    hi = Math.imul(ah9, bh8);
+    lo = (lo + Math.imul(al8, bl9)) | 0;
+    mid = (mid + Math.imul(al8, bh9)) | 0;
+    mid = (mid + Math.imul(ah8, bl9)) | 0;
+    hi = (hi + Math.imul(ah8, bh9)) | 0;
+    var w17 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w17 >>> 26)) | 0;
+    w17 &= 0x3ffffff;
+    /* k = 18 */
+    lo = Math.imul(al9, bl9);
+    mid = Math.imul(al9, bh9);
+    mid = (mid + Math.imul(ah9, bl9)) | 0;
+    hi = Math.imul(ah9, bh9);
+    var w18 = (((c + lo) | 0) + ((mid & 0x1fff) << 13)) | 0;
+    c = (((hi + (mid >>> 13)) | 0) + (w18 >>> 26)) | 0;
+    w18 &= 0x3ffffff;
+    o[0] = w0;
+    o[1] = w1;
+    o[2] = w2;
+    o[3] = w3;
+    o[4] = w4;
+    o[5] = w5;
+    o[6] = w6;
+    o[7] = w7;
+    o[8] = w8;
+    o[9] = w9;
+    o[10] = w10;
+    o[11] = w11;
+    o[12] = w12;
+    o[13] = w13;
+    o[14] = w14;
+    o[15] = w15;
+    o[16] = w16;
+    o[17] = w17;
+    o[18] = w18;
+    if (c !== 0) {
+      o[19] = c;
+      out.length++;
+    }
+    return out;
+  };
 
-function formatValue(ctx, value, recurseTimes) {
-  // Provide a hook for user-specified inspect functions.
-  // Check that value is an object with an inspect function on it
-  if (ctx.customInspect &&
-      value &&
-      isFunction(value.inspect) &&
-      // Filter out the util module, it's inspect function is special
-      value.inspect !== exports.inspect &&
-      // Also filter out any prototype objects using the circular check.
-      !(value.constructor && value.constructor.prototype === value)) {
-    var ret = value.inspect(recurseTimes, ctx);
-    if (!isString(ret)) {
-      ret = formatValue(ctx, ret, recurseTimes);
+  // Polyfill comb
+  if (!Math.imul) {
+    comb10MulTo = smallMulTo;
+  }
+
+  function bigMulTo (self, num, out) {
+    out.negative = num.negative ^ self.negative;
+    out.length = self.length + num.length;
+
+    var carry = 0;
+    var hncarry = 0;
+    for (var k = 0; k < out.length - 1; k++) {
+      // Sum all words with the same `i + j = k` and accumulate `ncarry`,
+      // note that ncarry could be >= 0x3ffffff
+      var ncarry = hncarry;
+      hncarry = 0;
+      var rword = carry & 0x3ffffff;
+      var maxJ = Math.min(k, num.length - 1);
+      for (var j = Math.max(0, k - self.length + 1); j <= maxJ; j++) {
+        var i = k - j;
+        var a = self.words[i] | 0;
+        var b = num.words[j] | 0;
+        var r = a * b;
+
+        var lo = r & 0x3ffffff;
+        ncarry = (ncarry + ((r / 0x4000000) | 0)) | 0;
+        lo = (lo + rword) | 0;
+        rword = lo & 0x3ffffff;
+        ncarry = (ncarry + (lo >>> 26)) | 0;
+
+        hncarry += ncarry >>> 26;
+        ncarry &= 0x3ffffff;
+      }
+      out.words[k] = rword;
+      carry = ncarry;
+      ncarry = hncarry;
     }
-    return ret;
+    if (carry !== 0) {
+      out.words[k] = carry;
+    } else {
+      out.length--;
+    }
+
+    return out.strip();
   }
 
-  // Primitive types cannot have properties
-  var primitive = formatPrimitive(ctx, value);
-  if (primitive) {
-    return primitive;
+  function jumboMulTo (self, num, out) {
+    var fftm = new FFTM();
+    return fftm.mulp(self, num, out);
   }
 
-  // Look up the keys of the object.
-  var keys = Object.keys(value);
-  var visibleKeys = arrayToHash(keys);
+  BN.prototype.mulTo = function mulTo (num, out) {
+    var res;
+    var len = this.length + num.length;
+    if (this.length === 10 && num.length === 10) {
+      res = comb10MulTo(this, num, out);
+    } else if (len < 63) {
+      res = smallMulTo(this, num, out);
+    } else if (len < 1024) {
+      res = bigMulTo(this, num, out);
+    } else {
+      res = jumboMulTo(this, num, out);
+    }
 
-  if (ctx.showHidden) {
-    keys = Object.getOwnPropertyNames(value);
-  }
+    return res;
+  };
 
-  // IE doesn't make error fields non-enumerable
-  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
-  if (isError(value)
-      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
-    return formatError(value);
+  // Cooley-Tukey algorithm for FFT
+  // slightly revisited to rely on looping instead of recursion
+
+  function FFTM (x, y) {
+    this.x = x;
+    this.y = y;
   }
 
-  // Some type of object without properties can be shortcutted.
-  if (keys.length === 0) {
-    if (isFunction(value)) {
-      var name = value.name ? ': ' + value.name : '';
-      return ctx.stylize('[Function' + name + ']', 'special');
-    }
-    if (isRegExp(value)) {
-      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+  FFTM.prototype.makeRBT = function makeRBT (N) {
+    var t = new Array(N);
+    var l = BN.prototype._countBits(N) - 1;
+    for (var i = 0; i < N; i++) {
+      t[i] = this.revBin(i, l, N);
     }
-    if (isDate(value)) {
-      return ctx.stylize(Date.prototype.toString.call(value), 'date');
+
+    return t;
+  };
+
+  // Returns binary-reversed representation of `x`
+  FFTM.prototype.revBin = function revBin (x, l, N) {
+    if (x === 0 || x === N - 1) return x;
+
+    var rb = 0;
+    for (var i = 0; i < l; i++) {
+      rb |= (x & 1) << (l - i - 1);
+      x >>= 1;
     }
-    if (isError(value)) {
-      return formatError(value);
+
+    return rb;
+  };
+
+  // Performs "tweedling" phase, therefore 'emulating'
+  // behaviour of the recursive algorithm
+  FFTM.prototype.permute = function permute (rbt, rws, iws, rtws, itws, N) {
+    for (var i = 0; i < N; i++) {
+      rtws[i] = rws[rbt[i]];
+      itws[i] = iws[rbt[i]];
     }
-  }
+  };
 
-  var base = '', array = false, braces = ['{', '}'];
+  FFTM.prototype.transform = function transform (rws, iws, rtws, itws, N, rbt) {
+    this.permute(rbt, rws, iws, rtws, itws, N);
 
-  // Make Array say that they are Array
-  if (isArray(value)) {
-    array = true;
-    braces = ['[', ']'];
-  }
+    for (var s = 1; s < N; s <<= 1) {
+      var l = s << 1;
 
-  // Make functions say that they are functions
-  if (isFunction(value)) {
-    var n = value.name ? ': ' + value.name : '';
-    base = ' [Function' + n + ']';
-  }
+      var rtwdf = Math.cos(2 * Math.PI / l);
+      var itwdf = Math.sin(2 * Math.PI / l);
 
-  // Make RegExps say that they are RegExps
-  if (isRegExp(value)) {
-    base = ' ' + RegExp.prototype.toString.call(value);
-  }
+      for (var p = 0; p < N; p += l) {
+        var rtwdf_ = rtwdf;
+        var itwdf_ = itwdf;
 
-  // Make dates with properties first say the date
-  if (isDate(value)) {
-    base = ' ' + Date.prototype.toUTCString.call(value);
-  }
+        for (var j = 0; j < s; j++) {
+          var re = rtws[p + j];
+          var ie = itws[p + j];
 
-  // Make error with message first say the error
-  if (isError(value)) {
-    base = ' ' + formatError(value);
-  }
+          var ro = rtws[p + j + s];
+          var io = itws[p + j + s];
 
-  if (keys.length === 0 && (!array || value.length == 0)) {
-    return braces[0] + base + braces[1];
-  }
+          var rx = rtwdf_ * ro - itwdf_ * io;
 
-  if (recurseTimes < 0) {
-    if (isRegExp(value)) {
-      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-    } else {
-      return ctx.stylize('[Object]', 'special');
-    }
-  }
+          io = rtwdf_ * io + itwdf_ * ro;
+          ro = rx;
 
-  ctx.seen.push(value);
+          rtws[p + j] = re + ro;
+          itws[p + j] = ie + io;
 
-  var output;
-  if (array) {
-    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
-  } else {
-    output = keys.map(function(key) {
-      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
-    });
-  }
+          rtws[p + j + s] = re - ro;
+          itws[p + j + s] = ie - io;
 
-  ctx.seen.pop();
+          /* jshint maxdepth : false */
+          if (j !== l) {
+            rx = rtwdf * rtwdf_ - itwdf * itwdf_;
 
-  return reduceToSingleString(output, base, braces);
-}
+            itwdf_ = rtwdf * itwdf_ + itwdf * rtwdf_;
+            rtwdf_ = rx;
+          }
+        }
+      }
+    }
+  };
 
+  FFTM.prototype.guessLen13b = function guessLen13b (n, m) {
+    var N = Math.max(m, n) | 1;
+    var odd = N & 1;
+    var i = 0;
+    for (N = N / 2 | 0; N; N = N >>> 1) {
+      i++;
+    }
 
-function formatPrimitive(ctx, value) {
-  if (isUndefined(value))
-    return ctx.stylize('undefined', 'undefined');
-  if (isString(value)) {
-    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
-                                             .replace(/'/g, "\\'")
-                                             .replace(/\\"/g, '"') + '\'';
-    return ctx.stylize(simple, 'string');
-  }
-  if (isNumber(value))
-    return ctx.stylize('' + value, 'number');
-  if (isBoolean(value))
-    return ctx.stylize('' + value, 'boolean');
-  // For some reason typeof null is "object", so special case here.
-  if (isNull(value))
-    return ctx.stylize('null', 'null');
-}
+    return 1 << i + 1 + odd;
+  };
 
+  FFTM.prototype.conjugate = function conjugate (rws, iws, N) {
+    if (N <= 1) return;
 
-function formatError(value) {
-  return '[' + Error.prototype.toString.call(value) + ']';
-}
+    for (var i = 0; i < N / 2; i++) {
+      var t = rws[i];
 
+      rws[i] = rws[N - i - 1];
+      rws[N - i - 1] = t;
 
-function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
-  var output = [];
-  for (var i = 0, l = value.length; i < l; ++i) {
-    if (hasOwnProperty(value, String(i))) {
-      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-          String(i), true));
-    } else {
-      output.push('');
-    }
-  }
-  keys.forEach(function(key) {
-    if (!key.match(/^\d+$/)) {
-      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
-          key, true));
+      t = iws[i];
+
+      iws[i] = -iws[N - i - 1];
+      iws[N - i - 1] = -t;
     }
-  });
-  return output;
-}
+  };
 
+  FFTM.prototype.normalize13b = function normalize13b (ws, N) {
+    var carry = 0;
+    for (var i = 0; i < N / 2; i++) {
+      var w = Math.round(ws[2 * i + 1] / N) * 0x2000 +
+        Math.round(ws[2 * i] / N) +
+        carry;
 
-function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
-  var name, str, desc;
-  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
-  if (desc.get) {
-    if (desc.set) {
-      str = ctx.stylize('[Getter/Setter]', 'special');
-    } else {
-      str = ctx.stylize('[Getter]', 'special');
-    }
-  } else {
-    if (desc.set) {
-      str = ctx.stylize('[Setter]', 'special');
-    }
-  }
-  if (!hasOwnProperty(visibleKeys, key)) {
-    name = '[' + key + ']';
-  }
-  if (!str) {
-    if (ctx.seen.indexOf(desc.value) < 0) {
-      if (isNull(recurseTimes)) {
-        str = formatValue(ctx, desc.value, null);
+      ws[i] = w & 0x3ffffff;
+
+      if (w < 0x4000000) {
+        carry = 0;
       } else {
-        str = formatValue(ctx, desc.value, recurseTimes - 1);
-      }
-      if (str.indexOf('\n') > -1) {
-        if (array) {
-          str = str.split('\n').map(function(line) {
-            return '  ' + line;
-          }).join('\n').substr(2);
-        } else {
-          str = '\n' + str.split('\n').map(function(line) {
-            return '   ' + line;
-          }).join('\n');
-        }
+        carry = w / 0x4000000 | 0;
       }
-    } else {
-      str = ctx.stylize('[Circular]', 'special');
-    }
-  }
-  if (isUndefined(name)) {
-    if (array && key.match(/^\d+$/)) {
-      return str;
-    }
-    name = JSON.stringify('' + key);
-    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
-      name = name.substr(1, name.length - 2);
-      name = ctx.stylize(name, 'name');
-    } else {
-      name = name.replace(/'/g, "\\'")
-                 .replace(/\\"/g, '"')
-                 .replace(/(^"|"$)/g, "'");
-      name = ctx.stylize(name, 'string');
     }
-  }
 
-  return name + ': ' + str;
-}
+    return ws;
+  };
 
+  FFTM.prototype.convert13b = function convert13b (ws, len, rws, N) {
+    var carry = 0;
+    for (var i = 0; i < len; i++) {
+      carry = carry + (ws[i] | 0);
 
-function reduceToSingleString(output, base, braces) {
-  var numLinesEst = 0;
-  var length = output.reduce(function(prev, cur) {
-    numLinesEst++;
-    if (cur.indexOf('\n') >= 0) numLinesEst++;
-    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
-  }, 0);
+      rws[2 * i] = carry & 0x1fff; carry = carry >>> 13;
+      rws[2 * i + 1] = carry & 0x1fff; carry = carry >>> 13;
+    }
 
-  if (length > 60) {
-    return braces[0] +
-           (base === '' ? '' : base + '\n ') +
-           ' ' +
-           output.join(',\n  ') +
-           ' ' +
-           braces[1];
-  }
+    // Pad with zeroes
+    for (i = 2 * len; i < N; ++i) {
+      rws[i] = 0;
+    }
 
-  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
-}
+    assert(carry === 0);
+    assert((carry & ~0x1fff) === 0);
+  };
 
+  FFTM.prototype.stub = function stub (N) {
+    var ph = new Array(N);
+    for (var i = 0; i < N; i++) {
+      ph[i] = 0;
+    }
 
-// NOTE: These type checking functions intentionally don't use `instanceof`
-// because it is fragile and can be easily faked with `Object.create()`.
-function isArray(ar) {
-  return Array.isArray(ar);
-}
-exports.isArray = isArray;
+    return ph;
+  };
+
+  FFTM.prototype.mulp = function mulp (x, y, out) {
+    var N = 2 * this.guessLen13b(x.length, y.length);
+
+    var rbt = this.makeRBT(N);
 
-function isBoolean(arg) {
-  return typeof arg === 'boolean';
-}
-exports.isBoolean = isBoolean;
+    var _ = this.stub(N);
 
-function isNull(arg) {
-  return arg === null;
-}
-exports.isNull = isNull;
+    var rws = new Array(N);
+    var rwst = new Array(N);
+    var iwst = new Array(N);
 
-function isNullOrUndefined(arg) {
-  return arg == null;
-}
-exports.isNullOrUndefined = isNullOrUndefined;
+    var nrws = new Array(N);
+    var nrwst = new Array(N);
+    var niwst = new Array(N);
 
-function isNumber(arg) {
-  return typeof arg === 'number';
-}
-exports.isNumber = isNumber;
+    var rmws = out.words;
+    rmws.length = N;
 
-function isString(arg) {
-  return typeof arg === 'string';
-}
-exports.isString = isString;
+    this.convert13b(x.words, x.length, rws, N);
+    this.convert13b(y.words, y.length, nrws, N);
 
-function isSymbol(arg) {
-  return typeof arg === 'symbol';
-}
-exports.isSymbol = isSymbol;
+    this.transform(rws, _, rwst, iwst, N, rbt);
+    this.transform(nrws, _, nrwst, niwst, N, rbt);
 
-function isUndefined(arg) {
-  return arg === void 0;
-}
-exports.isUndefined = isUndefined;
+    for (var i = 0; i < N; i++) {
+      var rx = rwst[i] * nrwst[i] - iwst[i] * niwst[i];
+      iwst[i] = rwst[i] * niwst[i] + iwst[i] * nrwst[i];
+      rwst[i] = rx;
+    }
 
-function isRegExp(re) {
-  return isObject(re) && objectToString(re) === '[object RegExp]';
-}
-exports.isRegExp = isRegExp;
+    this.conjugate(rwst, iwst, N);
+    this.transform(rwst, iwst, rmws, _, N, rbt);
+    this.conjugate(rmws, _, N);
+    this.normalize13b(rmws, N);
 
-function isObject(arg) {
-  return typeof arg === 'object' && arg !== null;
-}
-exports.isObject = isObject;
+    out.negative = x.negative ^ y.negative;
+    out.length = x.length + y.length;
+    return out.strip();
+  };
 
-function isDate(d) {
-  return isObject(d) && objectToString(d) === '[object Date]';
-}
-exports.isDate = isDate;
+  // Multiply `this` by `num`
+  BN.prototype.mul = function mul (num) {
+    var out = new BN(null);
+    out.words = new Array(this.length + num.length);
+    return this.mulTo(num, out);
+  };
 
-function isError(e) {
-  return isObject(e) &&
-      (objectToString(e) === '[object Error]' || e instanceof Error);
-}
-exports.isError = isError;
+  // Multiply employing FFT
+  BN.prototype.mulf = function mulf (num) {
+    var out = new BN(null);
+    out.words = new Array(this.length + num.length);
+    return jumboMulTo(this, num, out);
+  };
 
-function isFunction(arg) {
-  return typeof arg === 'function';
-}
-exports.isFunction = isFunction;
+  // In-place Multiplication
+  BN.prototype.imul = function imul (num) {
+    return this.clone().mulTo(num, this);
+  };
 
-function isPrimitive(arg) {
-  return arg === null ||
-         typeof arg === 'boolean' ||
-         typeof arg === 'number' ||
-         typeof arg === 'string' ||
-         typeof arg === 'symbol' ||  // ES6 symbol
-         typeof arg === 'undefined';
-}
-exports.isPrimitive = isPrimitive;
+  BN.prototype.imuln = function imuln (num) {
+    assert(typeof num === 'number');
+    assert(num < 0x4000000);
 
-exports.isBuffer = require('./support/isBuffer');
+    // Carry
+    var carry = 0;
+    for (var i = 0; i < this.length; i++) {
+      var w = (this.words[i] | 0) * num;
+      var lo = (w & 0x3ffffff) + (carry & 0x3ffffff);
+      carry >>= 26;
+      carry += (w / 0x4000000) | 0;
+      // NOTE: lo is 27bit maximum
+      carry += lo >>> 26;
+      this.words[i] = lo & 0x3ffffff;
+    }
 
-function objectToString(o) {
-  return Object.prototype.toString.call(o);
-}
+    if (carry !== 0) {
+      this.words[i] = carry;
+      this.length++;
+    }
 
+    return this;
+  };
 
-function pad(n) {
-  return n < 10 ? '0' + n.toString(10) : n.toString(10);
-}
+  BN.prototype.muln = function muln (num) {
+    return this.clone().imuln(num);
+  };
 
+  // `this` * `this`
+  BN.prototype.sqr = function sqr () {
+    return this.mul(this);
+  };
 
-var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
-              'Oct', 'Nov', 'Dec'];
+  // `this` * `this` in-place
+  BN.prototype.isqr = function isqr () {
+    return this.imul(this.clone());
+  };
 
-// 26 Feb 16:19:34
-function timestamp() {
-  var d = new Date();
-  var time = [pad(d.getHours()),
-              pad(d.getMinutes()),
-              pad(d.getSeconds())].join(':');
-  return [d.getDate(), months[d.getMonth()], time].join(' ');
-}
+  // Math.pow(`this`, `num`)
+  BN.prototype.pow = function pow (num) {
+    var w = toBitArray(num);
+    if (w.length === 0) return new BN(1);
 
+    // Skip leading zeroes
+    var res = this;
+    for (var i = 0; i < w.length; i++, res = res.sqr()) {
+      if (w[i] !== 0) break;
+    }
 
-// log is just a thin wrapper to console.log that prepends a timestamp
-exports.log = function() {
-  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
-};
+    if (++i < w.length) {
+      for (var q = res.sqr(); i < w.length; i++, q = q.sqr()) {
+        if (w[i] === 0) continue;
 
+        res = res.mul(q);
+      }
+    }
 
-/**
- * Inherit the prototype methods from one constructor into another.
- *
- * The Function.prototype.inherits from lang.js rewritten as a standalone
- * function (not on Function.prototype). NOTE: If this file is to be loaded
- * during bootstrapping this function needs to be rewritten using some native
- * functions as prototype setup using normal JavaScript does not work as
- * expected during bootstrapping (see mirror.js in r114903).
- *
- * @param {function} ctor Constructor function which needs to inherit the
- *     prototype.
- * @param {function} superCtor Constructor function to inherit prototype from.
- */
-exports.inherits = require('inherits');
+    return res;
+  };
 
-exports._extend = function(origin, add) {
-  // Don't do anything if add isn't an object
-  if (!add || !isObject(add)) return origin;
+  // Shift-left in-place
+  BN.prototype.iushln = function iushln (bits) {
+    assert(typeof bits === 'number' && bits >= 0);
+    var r = bits % 26;
+    var s = (bits - r) / 26;
+    var carryMask = (0x3ffffff >>> (26 - r)) << (26 - r);
+    var i;
+
+    if (r !== 0) {
+      var carry = 0;
+
+      for (i = 0; i < this.length; i++) {
+        var newCarry = this.words[i] & carryMask;
+        var c = ((this.words[i] | 0) - newCarry) << r;
+        this.words[i] = c | carry;
+        carry = newCarry >>> (26 - r);
+      }
 
-  var keys = Object.keys(add);
-  var i = keys.length;
-  while (i--) {
-    origin[keys[i]] = add[keys[i]];
-  }
-  return origin;
-};
+      if (carry) {
+        this.words[i] = carry;
+        this.length++;
+      }
+    }
 
-function hasOwnProperty(obj, prop) {
-  return Object.prototype.hasOwnProperty.call(obj, prop);
-}
+    if (s !== 0) {
+      for (i = this.length - 1; i >= 0; i--) {
+        this.words[i + s] = this.words[i];
+      }
 
-}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
-},{"./support/isBuffer":28,"_process":14,"inherits":12}],30:[function(require,module,exports){
-// Base58 encoding/decoding
-// Originally written by Mike Hearn for BitcoinJ
-// Copyright (c) 2011 Google Inc
-// Ported to JavaScript by Stefan Thomas
-// Merged Buffer refactorings from base58-native by Stephen Pair
-// Copyright (c) 2013 BitPay Inc
+      for (i = 0; i < s; i++) {
+        this.words[i] = 0;
+      }
 
-var ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
-var ALPHABET_MAP = {}
-for(var i = 0; i < ALPHABET.length; i++) {
-  ALPHABET_MAP[ALPHABET.charAt(i)] = i
-}
-var BASE = 58
+      this.length += s;
+    }
 
-function encode(buffer) {
-  if (buffer.length === 0) return ''
+    return this.strip();
+  };
 
-  var i, j, digits = [0]
-  for (i = 0; i < buffer.length; i++) {
-    for (j = 0; j < digits.length; j++) digits[j] <<= 8
+  BN.prototype.ishln = function ishln (bits) {
+    // TODO(indutny): implement me
+    assert(this.negative === 0);
+    return this.iushln(bits);
+  };
 
-    digits[0] += buffer[i]
+  // Shift-right in-place
+  // NOTE: `hint` is a lowest bit before trailing zeroes
+  // NOTE: if `extended` is present - it will be filled with destroyed bits
+  BN.prototype.iushrn = function iushrn (bits, hint, extended) {
+    assert(typeof bits === 'number' && bits >= 0);
+    var h;
+    if (hint) {
+      h = (hint - (hint % 26)) / 26;
+    } else {
+      h = 0;
+    }
 
-    var carry = 0
-    for (j = 0; j < digits.length; ++j) {
-      digits[j] += carry
+    var r = bits % 26;
+    var s = Math.min((bits - r) / 26, this.length);
+    var mask = 0x3ffffff ^ ((0x3ffffff >>> r) << r);
+    var maskedWords = extended;
 
-      carry = (digits[j] / BASE) | 0
-      digits[j] %= BASE
+    h -= s;
+    h = Math.max(0, h);
+
+    // Extended mode, copy masked part
+    if (maskedWords) {
+      for (var i = 0; i < s; i++) {
+        maskedWords.words[i] = this.words[i];
+      }
+      maskedWords.length = s;
     }
 
-    while (carry) {
-      digits.push(carry % BASE)
+    if (s === 0) {
+      // No-op, we should not move anything at all
+    } else if (this.length > s) {
+      this.length -= s;
+      for (i = 0; i < this.length; i++) {
+        this.words[i] = this.words[i + s];
+      }
+    } else {
+      this.words[0] = 0;
+      this.length = 1;
+    }
 
-      carry = (carry / BASE) | 0
+    var carry = 0;
+    for (i = this.length - 1; i >= 0 && (carry !== 0 || i >= h); i--) {
+      var word = this.words[i] | 0;
+      this.words[i] = (carry << (26 - r)) | (word >>> r);
+      carry = word & mask;
     }
-  }
 
-  // deal with leading zeros
-  for (i = 0; buffer[i] === 0 && i < buffer.length - 1; i++) digits.push(0)
+    // Push carried bits as a mask
+    if (maskedWords && carry !== 0) {
+      maskedWords.words[maskedWords.length++] = carry;
+    }
 
-  // convert digits to a string
-  var stringOutput = ""
-  for (var i = digits.length - 1; i >= 0; i--) {
-    stringOutput = stringOutput + ALPHABET[digits[i]]
-  }
-  return stringOutput
-}
+    if (this.length === 0) {
+      this.words[0] = 0;
+      this.length = 1;
+    }
 
-function decode(string) {
-  if (string.length === 0) return []
+    return this.strip();
+  };
 
-  var i, j, bytes = [0]
-  for (i = 0; i < string.length; i++) {
-    var c = string[i]
-    if (!(c in ALPHABET_MAP)) throw new Error('Non-base58 character')
+  BN.prototype.ishrn = function ishrn (bits, hint, extended) {
+    // TODO(indutny): implement me
+    assert(this.negative === 0);
+    return this.iushrn(bits, hint, extended);
+  };
 
-    for (j = 0; j < bytes.length; j++) bytes[j] *= BASE
-    bytes[0] += ALPHABET_MAP[c]
+  // Shift-left
+  BN.prototype.shln = function shln (bits) {
+    return this.clone().ishln(bits);
+  };
 
-    var carry = 0
-    for (j = 0; j < bytes.length; ++j) {
-      bytes[j] += carry
+  BN.prototype.ushln = function ushln (bits) {
+    return this.clone().iushln(bits);
+  };
 
-      carry = bytes[j] >> 8
-      bytes[j] &= 0xff
+  // Shift-right
+  BN.prototype.shrn = function shrn (bits) {
+    return this.clone().ishrn(bits);
+  };
+
+  BN.prototype.ushrn = function ushrn (bits) {
+    return this.clone().iushrn(bits);
+  };
+
+  // Test if n bit is set
+  BN.prototype.testn = function testn (bit) {
+    assert(typeof bit === 'number' && bit >= 0);
+    var r = bit % 26;
+    var s = (bit - r) / 26;
+    var q = 1 << r;
+
+    // Fast case: bit is much higher than all existing words
+    if (this.length <= s) return false;
+
+    // Check bit and return
+    var w = this.words[s];
+
+    return !!(w & q);
+  };
+
+  // Return only lowers bits of number (in-place)
+  BN.prototype.imaskn = function imaskn (bits) {
+    assert(typeof bits === 'number' && bits >= 0);
+    var r = bits % 26;
+    var s = (bits - r) / 26;
+
+    assert(this.negative === 0, 'imaskn works only with positive numbers');
+
+    if (this.length <= s) {
+      return this;
     }
 
-    while (carry) {
-      bytes.push(carry & 0xff)
+    if (r !== 0) {
+      s++;
+    }
+    this.length = Math.min(s, this.length);
 
-      carry >>= 8
+    if (r !== 0) {
+      var mask = 0x3ffffff ^ ((0x3ffffff >>> r) << r);
+      this.words[this.length - 1] &= mask;
     }
-  }
 
-  // deal with leading zeros
-  for (i = 0; string[i] === '1' && i < string.length - 1; i++) bytes.push(0)
+    return this.strip();
+  };
 
-  return bytes.reverse()
-}
+  // Return only lowers bits of number
+  BN.prototype.maskn = function maskn (bits) {
+    return this.clone().imaskn(bits);
+  };
 
-module.exports = {
-  encode: encode,
-  decode: decode
-}
+  // Add plain number `num` to `this`
+  BN.prototype.iaddn = function iaddn (num) {
+    assert(typeof num === 'number');
+    assert(num < 0x4000000);
+    if (num < 0) return this.isubn(-num);
+
+    // Possible sign change
+    if (this.negative !== 0) {
+      if (this.length === 1 && (this.words[0] | 0) < num) {
+        this.words[0] = num - (this.words[0] | 0);
+        this.negative = 0;
+        return this;
+      }
 
-},{}],31:[function(require,module,exports){
-(function (Buffer){
-'use strict'
+      this.negative = 0;
+      this.isubn(num);
+      this.negative = 1;
+      return this;
+    }
 
-var base58 = require('bs58')
-var createHash = require('create-hash')
+    // Add without checks
+    return this._iaddn(num);
+  };
 
-// SHA256(SHA256(buffer))
-function sha256x2 (buffer) {
-  buffer = createHash('sha256').update(buffer).digest()
-  return createHash('sha256').update(buffer).digest()
-}
+  BN.prototype._iaddn = function _iaddn (num) {
+    this.words[0] += num;
 
-// Encode a buffer as a base58-check encoded string
-function encode (payload) {
-  var checksum = sha256x2(payload).slice(0, 4)
+    // Carry
+    for (var i = 0; i < this.length && this.words[i] >= 0x4000000; i++) {
+      this.words[i] -= 0x4000000;
+      if (i === this.length - 1) {
+        this.words[i + 1] = 1;
+      } else {
+        this.words[i + 1]++;
+      }
+    }
+    this.length = Math.max(this.length, i + 1);
 
-  return base58.encode(Buffer.concat([
-    payload,
-    checksum
-  ]))
-}
+    return this;
+  };
 
-// Decode a base58-check encoded string to a buffer
-function decode (string) {
-  var buffer = new Buffer(base58.decode(string))
+  // Subtract plain number `num` from `this`
+  BN.prototype.isubn = function isubn (num) {
+    assert(typeof num === 'number');
+    assert(num < 0x4000000);
+    if (num < 0) return this.iaddn(-num);
 
-  var payload = buffer.slice(0, -4)
-  var checksum = buffer.slice(-4)
-  var newChecksum = sha256x2(payload).slice(0, 4)
+    if (this.negative !== 0) {
+      this.negative = 0;
+      this.iaddn(num);
+      this.negative = 1;
+      return this;
+    }
 
-  for (var i = 0; i < newChecksum.length; ++i) {
-    if (newChecksum[i] === checksum[i]) continue
+    this.words[0] -= num;
 
-    throw new Error('Invalid checksum')
-  }
+    if (this.length === 1 && this.words[0] < 0) {
+      this.words[0] = -this.words[0];
+      this.negative = 1;
+    } else {
+      // Carry
+      for (var i = 0; i < this.length && this.words[i] < 0; i++) {
+        this.words[i] += 0x4000000;
+        this.words[i + 1] -= 1;
+      }
+    }
 
-  return payload
-}
+    return this.strip();
+  };
 
-module.exports = {
-  encode: encode,
-  decode: decode
-}
+  BN.prototype.addn = function addn (num) {
+    return this.clone().iaddn(num);
+  };
 
-}).call(this,require("buffer").Buffer)
-},{"bs58":30,"buffer":7,"create-hash":32}],32:[function(require,module,exports){
-(function (Buffer){
-'use strict';
-var inherits = require('inherits')
-var md5 = require('./md5')
-var rmd160 = require('ripemd160')
-var sha = require('sha.js')
+  BN.prototype.subn = function subn (num) {
+    return this.clone().isubn(num);
+  };
 
-var Transform = require('stream').Transform
+  BN.prototype.iabs = function iabs () {
+    this.negative = 0;
 
-function HashNoConstructor(hash) {
-  Transform.call(this)
+    return this;
+  };
 
-  this._hash = hash
-  this.buffers = []
-}
+  BN.prototype.abs = function abs () {
+    return this.clone().iabs();
+  };
 
-inherits(HashNoConstructor, Transform)
+  BN.prototype._ishlnsubmul = function _ishlnsubmul (num, mul, shift) {
+    var len = num.length + shift;
+    var i;
 
-HashNoConstructor.prototype._transform = function (data, _, next) {
-  this.buffers.push(data)
+    this._expand(len);
 
-  next()
-}
+    var w;
+    var carry = 0;
+    for (i = 0; i < num.length; i++) {
+      w = (this.words[i + shift] | 0) + carry;
+      var right = (num.words[i] | 0) * mul;
+      w -= right & 0x3ffffff;
+      carry = (w >> 26) - ((right / 0x4000000) | 0);
+      this.words[i + shift] = w & 0x3ffffff;
+    }
+    for (; i < this.length - shift; i++) {
+      w = (this.words[i + shift] | 0) + carry;
+      carry = w >> 26;
+      this.words[i + shift] = w & 0x3ffffff;
+    }
 
-HashNoConstructor.prototype._flush = function (next) {
-  this.push(this.digest())
-  next()
-}
+    if (carry === 0) return this.strip();
 
-HashNoConstructor.prototype.update = function (data, enc) {
-  if (typeof data === 'string') {
-    data = new Buffer(data, enc)
-  }
+    // Subtraction overflow
+    assert(carry === -1);
+    carry = 0;
+    for (i = 0; i < this.length; i++) {
+      w = -(this.words[i] | 0) + carry;
+      carry = w >> 26;
+      this.words[i] = w & 0x3ffffff;
+    }
+    this.negative = 1;
 
-  this.buffers.push(data)
-  return this
-}
+    return this.strip();
+  };
 
-HashNoConstructor.prototype.digest = function (enc) {
-  var buf = Buffer.concat(this.buffers)
-  var r = this._hash(buf)
-  this.buffers = null
+  BN.prototype._wordDiv = function _wordDiv (num, mode) {
+    var shift = this.length - num.length;
 
-  return enc ? r.toString(enc) : r
-}
+    var a = this.clone();
+    var b = num;
 
-function Hash(hash) {
-  Transform.call(this)
+    // Normalize
+    var bhi = b.words[b.length - 1] | 0;
+    var bhiBits = this._countBits(bhi);
+    shift = 26 - bhiBits;
+    if (shift !== 0) {
+      b = b.ushln(shift);
+      a.iushln(shift);
+      bhi = b.words[b.length - 1] | 0;
+    }
 
-  this._hash = hash
-}
+    // Initialize quotient
+    var m = a.length - b.length;
+    var q;
 
-inherits(Hash, Transform)
+    if (mode !== 'mod') {
+      q = new BN(null);
+      q.length = m + 1;
+      q.words = new Array(q.length);
+      for (var i = 0; i < q.length; i++) {
+        q.words[i] = 0;
+      }
+    }
 
-Hash.prototype._transform = function (data, enc, next) {
-  if (enc) data = new Buffer(data, enc)
+    var diff = a.clone()._ishlnsubmul(b, 1, m);
+    if (diff.negative === 0) {
+      a = diff;
+      if (q) {
+        q.words[m] = 1;
+      }
+    }
 
-  this._hash.update(data)
+    for (var j = m - 1; j >= 0; j--) {
+      var qj = (a.words[b.length + j] | 0) * 0x4000000 +
+        (a.words[b.length + j - 1] | 0);
 
-  next()
-}
+      // NOTE: (qj / bhi) is (0x3ffffff * 0x4000000 + 0x3ffffff) / 0x2000000 max
+      // (0x7ffffff)
+      qj = Math.min((qj / bhi) | 0, 0x3ffffff);
 
-Hash.prototype._flush = function (next) {
-  this.push(this._hash.digest())
-  this._hash = null
+      a._ishlnsubmul(b, qj, j);
+      while (a.negative !== 0) {
+        qj--;
+        a.negative = 0;
+        a._ishlnsubmul(b, 1, j);
+        if (!a.isZero()) {
+          a.negative ^= 1;
+        }
+      }
+      if (q) {
+        q.words[j] = qj;
+      }
+    }
+    if (q) {
+      q.strip();
+    }
+    a.strip();
 
-  next()
-}
+    // Denormalize
+    if (mode !== 'div' && shift !== 0) {
+      a.iushrn(shift);
+    }
 
-Hash.prototype.update = function (data, enc) {
-  if (typeof data === 'string') {
-    data = new Buffer(data, enc)
-  }
+    return {
+      div: q || null,
+      mod: a
+    };
+  };
 
-  this._hash.update(data)
-  return this
-}
+  // NOTE: 1) `mode` can be set to `mod` to request mod only,
+  //       to `div` to request div only, or be absent to
+  //       request both div & mod
+  //       2) `positive` is true if unsigned mod is requested
+  BN.prototype.divmod = function divmod (num, mode, positive) {
+    assert(!num.isZero());
+
+    if (this.isZero()) {
+      return {
+        div: new BN(0),
+        mod: new BN(0)
+      };
+    }
 
-Hash.prototype.digest = function (enc) {
-  var outData = this._hash.digest()
+    var div, mod, res;
+    if (this.negative !== 0 && num.negative === 0) {
+      res = this.neg().divmod(num, mode);
 
-  return enc ? outData.toString(enc) : outData
-}
+      if (mode !== 'mod') {
+        div = res.div.neg();
+      }
 
-module.exports = function createHash (alg) {
-  if ('md5' === alg) return new HashNoConstructor(md5)
-  if ('rmd160' === alg) return new HashNoConstructor(rmd160)
+      if (mode !== 'div') {
+        mod = res.mod.neg();
+        if (positive && mod.negative !== 0) {
+          mod.iadd(num);
+        }
+      }
 
-  return new Hash(sha(alg))
-}
+      return {
+        div: div,
+        mod: mod
+      };
+    }
 
-}).call(this,require("buffer").Buffer)
-},{"./md5":34,"buffer":7,"inherits":35,"ripemd160":36,"sha.js":38,"stream":26}],33:[function(require,module,exports){
-(function (Buffer){
-'use strict';
-var intSize = 4;
-var zeroBuffer = new Buffer(intSize); zeroBuffer.fill(0);
-var chrsz = 8;
+    if (this.negative === 0 && num.negative !== 0) {
+      res = this.divmod(num.neg(), mode);
 
-function toArray(buf, bigEndian) {
-  if ((buf.length % intSize) !== 0) {
-    var len = buf.length + (intSize - (buf.length % intSize));
-    buf = Buffer.concat([buf, zeroBuffer], len);
-  }
+      if (mode !== 'mod') {
+        div = res.div.neg();
+      }
 
-  var arr = [];
-  var fn = bigEndian ? buf.readInt32BE : buf.readInt32LE;
-  for (var i = 0; i < buf.length; i += intSize) {
-    arr.push(fn.call(buf, i));
-  }
-  return arr;
-}
+      return {
+        div: div,
+        mod: res.mod
+      };
+    }
 
-function toBuffer(arr, size, bigEndian) {
-  var buf = new Buffer(size);
-  var fn = bigEndian ? buf.writeInt32BE : buf.writeInt32LE;
-  for (var i = 0; i < arr.length; i++) {
-    fn.call(buf, arr[i], i * 4, true);
-  }
-  return buf;
-}
+    if ((this.negative & num.negative) !== 0) {
+      res = this.neg().divmod(num.neg(), mode);
 
-function hash(buf, fn, hashSize, bigEndian) {
-  if (!Buffer.isBuffer(buf)) buf = new Buffer(buf);
-  var arr = fn(toArray(buf, bigEndian), buf.length * chrsz);
-  return toBuffer(arr, hashSize, bigEndian);
-}
-exports.hash = hash;
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],34:[function(require,module,exports){
-'use strict';
-/*
- * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
- * Digest Algorithm, as defined in RFC 1321.
- * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
- * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
- * Distributed under the BSD License
- * See http://pajhome.org.uk/crypt/md5 for more info.
- */
+      if (mode !== 'div') {
+        mod = res.mod.neg();
+        if (positive && mod.negative !== 0) {
+          mod.isub(num);
+        }
+      }
 
-var helpers = require('./helpers');
+      return {
+        div: res.div,
+        mod: mod
+      };
+    }
 
-/*
- * Calculate the MD5 of an array of little-endian words, and a bit length
- */
-function core_md5(x, len)
-{
-  /* append padding */
-  x[len >> 5] |= 0x80 << ((len) % 32);
-  x[(((len + 64) >>> 9) << 4) + 14] = len;
+    // Both numbers are positive at this point
 
-  var a =  1732584193;
-  var b = -271733879;
-  var c = -1732584194;
-  var d =  271733878;
+    // Strip both numbers to approximate shift value
+    if (num.length > this.length || this.cmp(num) < 0) {
+      return {
+        div: new BN(0),
+        mod: this
+      };
+    }
 
-  for(var i = 0; i < x.length; i += 16)
-  {
-    var olda = a;
-    var oldb = b;
-    var oldc = c;
-    var oldd = d;
+    // Very short reduction
+    if (num.length === 1) {
+      if (mode === 'div') {
+        return {
+          div: this.divn(num.words[0]),
+          mod: null
+        };
+      }
 
-    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
-    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
-    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
-    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
-    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
-    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
-    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
-    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
-    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
-    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
-    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
-    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
-    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
-    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
-    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
-    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);
+      if (mode === 'mod') {
+        return {
+          div: null,
+          mod: new BN(this.modn(num.words[0]))
+        };
+      }
 
-    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
-    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
-    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
-    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
-    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
-    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
-    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
-    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
-    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
-    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
-    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
-    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
-    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
-    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
-    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
-    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
+      return {
+        div: this.divn(num.words[0]),
+        mod: new BN(this.modn(num.words[0]))
+      };
+    }
 
-    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
-    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
-    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
-    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
-    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
-    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
-    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
-    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
-    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
-    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
-    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
-    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
-    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
-    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
-    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
-    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
+    return this._wordDiv(num, mode);
+  };
 
-    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
-    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
-    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
-    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
-    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
-    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
-    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
-    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
-    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
-    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
-    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
-    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
-    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
-    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
-    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
-    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
+  // Find `this` / `num`
+  BN.prototype.div = function div (num) {
+    return this.divmod(num, 'div', false).div;
+  };
 
-    a = safe_add(a, olda);
-    b = safe_add(b, oldb);
-    c = safe_add(c, oldc);
-    d = safe_add(d, oldd);
-  }
-  return Array(a, b, c, d);
+  // Find `this` % `num`
+  BN.prototype.mod = function mod (num) {
+    return this.divmod(num, 'mod', false).mod;
+  };
 
-}
+  BN.prototype.umod = function umod (num) {
+    return this.divmod(num, 'mod', true).mod;
+  };
 
-/*
- * These functions implement the four basic operations the algorithm uses.
- */
-function md5_cmn(q, a, b, x, s, t)
-{
-  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
-}
-function md5_ff(a, b, c, d, x, s, t)
-{
-  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
-}
-function md5_gg(a, b, c, d, x, s, t)
-{
-  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
-}
-function md5_hh(a, b, c, d, x, s, t)
-{
-  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-}
-function md5_ii(a, b, c, d, x, s, t)
-{
-  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
-}
+  // Find Round(`this` / `num`)
+  BN.prototype.divRound = function divRound (num) {
+    var dm = this.divmod(num);
 
-/*
- * Add integers, wrapping at 2^32. This uses 16-bit operations internally
- * to work around bugs in some JS interpreters.
- */
-function safe_add(x, y)
-{
-  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
-  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-  return (msw << 16) | (lsw & 0xFFFF);
-}
+    // Fast case - exact division
+    if (dm.mod.isZero()) return dm.div;
 
-/*
- * Bitwise rotate a 32-bit number to the left.
- */
-function bit_rol(num, cnt)
-{
-  return (num << cnt) | (num >>> (32 - cnt));
-}
+    var mod = dm.div.negative !== 0 ? dm.mod.isub(num) : dm.mod;
 
-module.exports = function md5(buf) {
-  return helpers.hash(buf, core_md5, 16);
-};
-},{"./helpers":33}],35:[function(require,module,exports){
-arguments[4][12][0].apply(exports,arguments)
-},{"dup":12}],36:[function(require,module,exports){
-(function (Buffer){
-/*
-CryptoJS v3.1.2
-code.google.com/p/crypto-js
-(c) 2009-2013 by Jeff Mott. All rights reserved.
-code.google.com/p/crypto-js/wiki/License
-*/
-/** @preserve
-(c) 2012 by Cédric Mesnil. All rights reserved.
+    var half = num.ushrn(1);
+    var r2 = num.andln(1);
+    var cmp = mod.cmp(half);
 
-Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+    // Round down
+    if (cmp < 0 || r2 === 1 && cmp === 0) return dm.div;
 
-    - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
-    - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    // Round up
+    return dm.div.negative !== 0 ? dm.div.isubn(1) : dm.div.iaddn(1);
+  };
 
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
+  BN.prototype.modn = function modn (num) {
+    assert(num <= 0x3ffffff);
+    var p = (1 << 26) % num;
 
-// constants table
-var zl = [
-  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
-  7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
-  3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
-  1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
-  4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
-]
+    var acc = 0;
+    for (var i = this.length - 1; i >= 0; i--) {
+      acc = (p * acc + (this.words[i] | 0)) % num;
+    }
 
-var zr = [
-  5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
-  6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
-  15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
-  8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
-  12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
-]
+    return acc;
+  };
 
-var sl = [
-  11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
-  7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
-  11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
-  11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
-  9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
-]
+  // In-place division by number
+  BN.prototype.idivn = function idivn (num) {
+    assert(num <= 0x3ffffff);
 
-var sr = [
-  8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
-  9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
-  9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
-  15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
-  8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
-]
+    var carry = 0;
+    for (var i = this.length - 1; i >= 0; i--) {
+      var w = (this.words[i] | 0) + carry * 0x4000000;
+      this.words[i] = (w / num) | 0;
+      carry = w % num;
+    }
 
-var hl = [0x00000000, 0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xA953FD4E]
-var hr = [0x50A28BE6, 0x5C4DD124, 0x6D703EF3, 0x7A6D76E9, 0x00000000]
+    return this.strip();
+  };
 
-function bytesToWords (bytes) {
-  var words = []
-  for (var i = 0, b = 0; i < bytes.length; i++, b += 8) {
-    words[b >>> 5] |= bytes[i] << (24 - b % 32)
-  }
-  return words
-}
+  BN.prototype.divn = function divn (num) {
+    return this.clone().idivn(num);
+  };
 
-function wordsToBytes (words) {
-  var bytes = []
-  for (var b = 0; b < words.length * 32; b += 8) {
-    bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF)
-  }
-  return bytes
-}
+  BN.prototype.egcd = function egcd (p) {
+    assert(p.negative === 0);
+    assert(!p.isZero());
 
-function processBlock (H, M, offset) {
-  // swap endian
-  for (var i = 0; i < 16; i++) {
-    var offset_i = offset + i
-    var M_offset_i = M[offset_i]
+    var x = this;
+    var y = p.clone();
 
-    // Swap
-    M[offset_i] = (
-      (((M_offset_i << 8) | (M_offset_i >>> 24)) & 0x00ff00ff) |
-      (((M_offset_i << 24) | (M_offset_i >>> 8)) & 0xff00ff00)
-    )
-  }
+    if (x.negative !== 0) {
+      x = x.umod(p);
+    } else {
+      x = x.clone();
+    }
 
-  // Working variables
-  var al, bl, cl, dl, el
-  var ar, br, cr, dr, er
+    // A * x + B * y = x
+    var A = new BN(1);
+    var B = new BN(0);
 
-  ar = al = H[0]
-  br = bl = H[1]
-  cr = cl = H[2]
-  dr = dl = H[3]
-  er = el = H[4]
+    // C * x + D * y = y
+    var C = new BN(0);
+    var D = new BN(1);
 
-  // computation
-  var t
-  for (i = 0; i < 80; i += 1) {
-    t = (al + M[offset + zl[i]]) | 0
-    if (i < 16) {
-      t += f1(bl, cl, dl) + hl[0]
-    } else if (i < 32) {
-      t += f2(bl, cl, dl) + hl[1]
-    } else if (i < 48) {
-      t += f3(bl, cl, dl) + hl[2]
-    } else if (i < 64) {
-      t += f4(bl, cl, dl) + hl[3]
-    } else {// if (i<80) {
-      t += f5(bl, cl, dl) + hl[4]
+    var g = 0;
+
+    while (x.isEven() && y.isEven()) {
+      x.iushrn(1);
+      y.iushrn(1);
+      ++g;
     }
-    t = t | 0
-    t = rotl(t, sl[i])
-    t = (t + el) | 0
-    al = el
-    el = dl
-    dl = rotl(cl, 10)
-    cl = bl
-    bl = t
 
-    t = (ar + M[offset + zr[i]]) | 0
-    if (i < 16) {
-      t += f5(br, cr, dr) + hr[0]
-    } else if (i < 32) {
-      t += f4(br, cr, dr) + hr[1]
-    } else if (i < 48) {
-      t += f3(br, cr, dr) + hr[2]
-    } else if (i < 64) {
-      t += f2(br, cr, dr) + hr[3]
-    } else {// if (i<80) {
-      t += f1(br, cr, dr) + hr[4]
+    var yp = y.clone();
+    var xp = x.clone();
+
+    while (!x.isZero()) {
+      for (var i = 0, im = 1; (x.words[0] & im) === 0 && i < 26; ++i, im <<= 1);
+      if (i > 0) {
+        x.iushrn(i);
+        while (i-- > 0) {
+          if (A.isOdd() || B.isOdd()) {
+            A.iadd(yp);
+            B.isub(xp);
+          }
+
+          A.iushrn(1);
+          B.iushrn(1);
+        }
+      }
+
+      for (var j = 0, jm = 1; (y.words[0] & jm) === 0 && j < 26; ++j, jm <<= 1);
+      if (j > 0) {
+        y.iushrn(j);
+        while (j-- > 0) {
+          if (C.isOdd() || D.isOdd()) {
+            C.iadd(yp);
+            D.isub(xp);
+          }
+
+          C.iushrn(1);
+          D.iushrn(1);
+        }
+      }
+
+      if (x.cmp(y) >= 0) {
+        x.isub(y);
+        A.isub(C);
+        B.isub(D);
+      } else {
+        y.isub(x);
+        C.isub(A);
+        D.isub(B);
+      }
     }
 
-    t = t | 0
-    t = rotl(t, sr[i])
-    t = (t + er) | 0
-    ar = er
-    er = dr
-    dr = rotl(cr, 10)
-    cr = br
-    br = t
-  }
+    return {
+      a: C,
+      b: D,
+      gcd: y.iushln(g)
+    };
+  };
 
-  // intermediate hash value
-  t = (H[1] + cl + dr) | 0
-  H[1] = (H[2] + dl + er) | 0
-  H[2] = (H[3] + el + ar) | 0
-  H[3] = (H[4] + al + br) | 0
-  H[4] = (H[0] + bl + cr) | 0
-  H[0] = t
-}
+  // This is reduced incarnation of the binary EEA
+  // above, designated to invert members of the
+  // _prime_ fields F(p) at a maximal speed
+  BN.prototype._invmp = function _invmp (p) {
+    assert(p.negative === 0);
+    assert(!p.isZero());
 
-function f1 (x, y, z) {
-  return ((x) ^ (y) ^ (z))
-}
+    var a = this;
+    var b = p.clone();
 
-function f2 (x, y, z) {
-  return (((x) & (y)) | ((~x) & (z)))
-}
+    if (a.negative !== 0) {
+      a = a.umod(p);
+    } else {
+      a = a.clone();
+    }
 
-function f3 (x, y, z) {
-  return (((x) | (~(y))) ^ (z))
-}
+    var x1 = new BN(1);
+    var x2 = new BN(0);
 
-function f4 (x, y, z) {
-  return (((x) & (z)) | ((y) & (~(z))))
-}
+    var delta = b.clone();
 
-function f5 (x, y, z) {
-  return ((x) ^ ((y) | (~(z))))
-}
+    while (a.cmpn(1) > 0 && b.cmpn(1) > 0) {
+      for (var i = 0, im = 1; (a.words[0] & im) === 0 && i < 26; ++i, im <<= 1);
+      if (i > 0) {
+        a.iushrn(i);
+        while (i-- > 0) {
+          if (x1.isOdd()) {
+            x1.iadd(delta);
+          }
 
-function rotl (x, n) {
-  return (x << n) | (x >>> (32 - n))
-}
+          x1.iushrn(1);
+        }
+      }
+
+      for (var j = 0, jm = 1; (b.words[0] & jm) === 0 && j < 26; ++j, jm <<= 1);
+      if (j > 0) {
+        b.iushrn(j);
+        while (j-- > 0) {
+          if (x2.isOdd()) {
+            x2.iadd(delta);
+          }
+
+          x2.iushrn(1);
+        }
+      }
+
+      if (a.cmp(b) >= 0) {
+        a.isub(b);
+        x1.isub(x2);
+      } else {
+        b.isub(a);
+        x2.isub(x1);
+      }
+    }
+
+    var res;
+    if (a.cmpn(1) === 0) {
+      res = x1;
+    } else {
+      res = x2;
+    }
+
+    if (res.cmpn(0) < 0) {
+      res.iadd(p);
+    }
+
+    return res;
+  };
+
+  BN.prototype.gcd = function gcd (num) {
+    if (this.isZero()) return num.abs();
+    if (num.isZero()) return this.abs();
+
+    var a = this.clone();
+    var b = num.clone();
+    a.negative = 0;
+    b.negative = 0;
+
+    // Remove common factor of two
+    for (var shift = 0; a.isEven() && b.isEven(); shift++) {
+      a.iushrn(1);
+      b.iushrn(1);
+    }
+
+    do {
+      while (a.isEven()) {
+        a.iushrn(1);
+      }
+      while (b.isEven()) {
+        b.iushrn(1);
+      }
 
-function ripemd160 (message) {
-  var H = [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0]
+      var r = a.cmp(b);
+      if (r < 0) {
+        // Swap `a` and `b` to make `a` always bigger than `b`
+        var t = a;
+        a = b;
+        b = t;
+      } else if (r === 0 || b.cmpn(1) === 0) {
+        break;
+      }
 
-  if (typeof message === 'string') {
-    message = new Buffer(message, 'utf8')
-  }
+      a.isub(b);
+    } while (true);
 
-  var m = bytesToWords(message)
+    return b.iushln(shift);
+  };
 
-  var nBitsLeft = message.length * 8
-  var nBitsTotal = message.length * 8
+  // Invert number in the field F(num)
+  BN.prototype.invm = function invm (num) {
+    return this.egcd(num).a.umod(num);
+  };
 
-  // Add padding
-  m[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32)
-  m[(((nBitsLeft + 64) >>> 9) << 4) + 14] = (
-    (((nBitsTotal << 8) | (nBitsTotal >>> 24)) & 0x00ff00ff) |
-    (((nBitsTotal << 24) | (nBitsTotal >>> 8)) & 0xff00ff00)
-  )
+  BN.prototype.isEven = function isEven () {
+    return (this.words[0] & 1) === 0;
+  };
 
-  for (var i = 0; i < m.length; i += 16) {
-    processBlock(H, m, i)
-  }
+  BN.prototype.isOdd = function isOdd () {
+    return (this.words[0] & 1) === 1;
+  };
 
-  // swap endian
-  for (i = 0; i < 5; i++) {
-    // shortcut
-    var H_i = H[i]
+  // And first word and num
+  BN.prototype.andln = function andln (num) {
+    return this.words[0] & num;
+  };
 
-    // Swap
-    H[i] = (((H_i << 8) | (H_i >>> 24)) & 0x00ff00ff) |
-      (((H_i << 24) | (H_i >>> 8)) & 0xff00ff00)
-  }
+  // Increment at the bit position in-line
+  BN.prototype.bincn = function bincn (bit) {
+    assert(typeof bit === 'number');
+    var r = bit % 26;
+    var s = (bit - r) / 26;
+    var q = 1 << r;
+
+    // Fast case: bit is much higher than all existing words
+    if (this.length <= s) {
+      this._expand(s + 1);
+      this.words[s] |= q;
+      return this;
+    }
 
-  var digestbytes = wordsToBytes(H)
-  return new Buffer(digestbytes)
-}
+    // Add bit and propagate, if needed
+    var carry = q;
+    for (var i = s; carry !== 0 && i < this.length; i++) {
+      var w = this.words[i] | 0;
+      w += carry;
+      carry = w >>> 26;
+      w &= 0x3ffffff;
+      this.words[i] = w;
+    }
+    if (carry !== 0) {
+      this.words[i] = carry;
+      this.length++;
+    }
+    return this;
+  };
 
-module.exports = ripemd160
+  BN.prototype.isZero = function isZero () {
+    return this.length === 1 && this.words[0] === 0;
+  };
 
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],37:[function(require,module,exports){
-(function (Buffer){
-// prototype class for hash functions
-function Hash (blockSize, finalSize) {
-  this._block = new Buffer(blockSize)
-  this._finalSize = finalSize
-  this._blockSize = blockSize
-  this._len = 0
-  this._s = 0
-}
+  BN.prototype.cmpn = function cmpn (num) {
+    var negative = num < 0;
 
-Hash.prototype.update = function (data, enc) {
-  if (typeof data === 'string') {
-    enc = enc || 'utf8'
-    data = new Buffer(data, enc)
-  }
+    if (this.negative !== 0 && !negative) return -1;
+    if (this.negative === 0 && negative) return 1;
 
-  var l = this._len += data.length
-  var s = this._s || 0
-  var f = 0
-  var buffer = this._block
+    this.strip();
 
-  while (s < l) {
-    var t = Math.min(data.length, f + this._blockSize - (s % this._blockSize))
-    var ch = (t - f)
+    var res;
+    if (this.length > 1) {
+      res = 1;
+    } else {
+      if (negative) {
+        num = -num;
+      }
 
-    for (var i = 0; i < ch; i++) {
-      buffer[(s % this._blockSize) + i] = data[i + f]
+      assert(num <= 0x3ffffff, 'Number is too big');
+
+      var w = this.words[0] | 0;
+      res = w === num ? 0 : w < num ? -1 : 1;
     }
+    if (this.negative !== 0) return -res | 0;
+    return res;
+  };
 
-    s += ch
-    f += ch
+  // Compare two numbers and return:
+  // 1 - if `this` > `num`
+  // 0 - if `this` == `num`
+  // -1 - if `this` < `num`
+  BN.prototype.cmp = function cmp (num) {
+    if (this.negative !== 0 && num.negative === 0) return -1;
+    if (this.negative === 0 && num.negative !== 0) return 1;
+
+    var res = this.ucmp(num);
+    if (this.negative !== 0) return -res | 0;
+    return res;
+  };
 
-    if ((s % this._blockSize) === 0) {
-      this._update(buffer)
+  // Unsigned comparison
+  BN.prototype.ucmp = function ucmp (num) {
+    // At this point both numbers have the same sign
+    if (this.length > num.length) return 1;
+    if (this.length < num.length) return -1;
+
+    var res = 0;
+    for (var i = this.length - 1; i >= 0; i--) {
+      var a = this.words[i] | 0;
+      var b = num.words[i] | 0;
+
+      if (a === b) continue;
+      if (a < b) {
+        res = -1;
+      } else if (a > b) {
+        res = 1;
+      }
+      break;
     }
-  }
-  this._s = s
+    return res;
+  };
 
-  return this
-}
+  BN.prototype.gtn = function gtn (num) {
+    return this.cmpn(num) === 1;
+  };
 
-Hash.prototype.digest = function (enc) {
-  // Suppose the length of the message M, in bits, is l
-  var l = this._len * 8
+  BN.prototype.gt = function gt (num) {
+    return this.cmp(num) === 1;
+  };
 
-  // Append the bit 1 to the end of the message
-  this._block[this._len % this._blockSize] = 0x80
+  BN.prototype.gten = function gten (num) {
+    return this.cmpn(num) >= 0;
+  };
 
-  // and then k zero bits, where k is the smallest non-negative solution to the equation (l + 1 + k) === finalSize mod blockSize
-  this._block.fill(0, this._len % this._blockSize + 1)
+  BN.prototype.gte = function gte (num) {
+    return this.cmp(num) >= 0;
+  };
 
-  if (l % (this._blockSize * 8) >= this._finalSize * 8) {
-    this._update(this._block)
-    this._block.fill(0)
-  }
+  BN.prototype.ltn = function ltn (num) {
+    return this.cmpn(num) === -1;
+  };
 
-  // to this append the block which is equal to the number l written in binary
-  // TODO: handle case where l is > Math.pow(2, 29)
-  this._block.writeInt32BE(l, this._blockSize - 4)
+  BN.prototype.lt = function lt (num) {
+    return this.cmp(num) === -1;
+  };
 
-  var hash = this._update(this._block) || this._hash()
+  BN.prototype.lten = function lten (num) {
+    return this.cmpn(num) <= 0;
+  };
 
-  return enc ? hash.toString(enc) : hash
-}
+  BN.prototype.lte = function lte (num) {
+    return this.cmp(num) <= 0;
+  };
 
-Hash.prototype._update = function () {
-  throw new Error('_update must be implemented by subclass')
-}
+  BN.prototype.eqn = function eqn (num) {
+    return this.cmpn(num) === 0;
+  };
 
-module.exports = Hash
+  BN.prototype.eq = function eq (num) {
+    return this.cmp(num) === 0;
+  };
 
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],38:[function(require,module,exports){
-var exports = module.exports = function SHA (algorithm) {
-  algorithm = algorithm.toLowerCase()
+  //
+  // A reduce context, could be using montgomery or something better, depending
+  // on the `m` itself.
+  //
+  BN.red = function red (num) {
+    return new Red(num);
+  };
 
-  var Algorithm = exports[algorithm]
-  if (!Algorithm) throw new Error(algorithm + ' is not supported (we accept pull requests)')
+  BN.prototype.toRed = function toRed (ctx) {
+    assert(!this.red, 'Already a number in reduction context');
+    assert(this.negative === 0, 'red works only with positives');
+    return ctx.convertTo(this)._forceRed(ctx);
+  };
 
-  return new Algorithm()
-}
+  BN.prototype.fromRed = function fromRed () {
+    assert(this.red, 'fromRed works only with numbers in reduction context');
+    return this.red.convertFrom(this);
+  };
 
-exports.sha = require('./sha')
-exports.sha1 = require('./sha1')
-exports.sha224 = require('./sha224')
-exports.sha256 = require('./sha256')
-exports.sha384 = require('./sha384')
-exports.sha512 = require('./sha512')
+  BN.prototype._forceRed = function _forceRed (ctx) {
+    this.red = ctx;
+    return this;
+  };
 
-},{"./sha":39,"./sha1":40,"./sha224":41,"./sha256":42,"./sha384":43,"./sha512":44}],39:[function(require,module,exports){
-(function (Buffer){
-/*
- * A JavaScript implementation of the Secure Hash Algorithm, SHA-0, as defined
- * in FIPS PUB 180-1
- * This source code is derived from sha1.js of the same repository.
- * The difference between SHA-0 and SHA-1 is just a bitwise rotate left
- * operation was added.
- */
+  BN.prototype.forceRed = function forceRed (ctx) {
+    assert(!this.red, 'Already a number in reduction context');
+    return this._forceRed(ctx);
+  };
 
-var inherits = require('inherits')
-var Hash = require('./hash')
+  BN.prototype.redAdd = function redAdd (num) {
+    assert(this.red, 'redAdd works only with red numbers');
+    return this.red.add(this, num);
+  };
 
-var W = new Array(80)
+  BN.prototype.redIAdd = function redIAdd (num) {
+    assert(this.red, 'redIAdd works only with red numbers');
+    return this.red.iadd(this, num);
+  };
 
-function Sha () {
-  this.init()
-  this._w = W
+  BN.prototype.redSub = function redSub (num) {
+    assert(this.red, 'redSub works only with red numbers');
+    return this.red.sub(this, num);
+  };
 
-  Hash.call(this, 64, 56)
-}
+  BN.prototype.redISub = function redISub (num) {
+    assert(this.red, 'redISub works only with red numbers');
+    return this.red.isub(this, num);
+  };
 
-inherits(Sha, Hash)
+  BN.prototype.redShl = function redShl (num) {
+    assert(this.red, 'redShl works only with red numbers');
+    return this.red.shl(this, num);
+  };
 
-Sha.prototype.init = function () {
-  this._a = 0x67452301 | 0
-  this._b = 0xefcdab89 | 0
-  this._c = 0x98badcfe | 0
-  this._d = 0x10325476 | 0
-  this._e = 0xc3d2e1f0 | 0
+  BN.prototype.redMul = function redMul (num) {
+    assert(this.red, 'redMul works only with red numbers');
+    this.red._verify2(this, num);
+    return this.red.mul(this, num);
+  };
 
-  return this
-}
+  BN.prototype.redIMul = function redIMul (num) {
+    assert(this.red, 'redMul works only with red numbers');
+    this.red._verify2(this, num);
+    return this.red.imul(this, num);
+  };
 
-/*
- * Bitwise rotate a 32-bit number to the left.
- */
-function rol (num, cnt) {
-  return (num << cnt) | (num >>> (32 - cnt))
-}
+  BN.prototype.redSqr = function redSqr () {
+    assert(this.red, 'redSqr works only with red numbers');
+    this.red._verify1(this);
+    return this.red.sqr(this);
+  };
 
-Sha.prototype._update = function (M) {
-  var W = this._w
+  BN.prototype.redISqr = function redISqr () {
+    assert(this.red, 'redISqr works only with red numbers');
+    this.red._verify1(this);
+    return this.red.isqr(this);
+  };
 
-  var a = this._a
-  var b = this._b
-  var c = this._c
-  var d = this._d
-  var e = this._e
+  // Square root over p
+  BN.prototype.redSqrt = function redSqrt () {
+    assert(this.red, 'redSqrt works only with red numbers');
+    this.red._verify1(this);
+    return this.red.sqrt(this);
+  };
 
-  var j = 0, k
+  BN.prototype.redInvm = function redInvm () {
+    assert(this.red, 'redInvm works only with red numbers');
+    this.red._verify1(this);
+    return this.red.invm(this);
+  };
 
-  /*
-   * SHA-1 has a bitwise rotate left operation. But, SHA is not
-   * function calcW() { return rol(W[j - 3] ^ W[j -  8] ^ W[j - 14] ^ W[j - 16], 1) }
-   */
-  function calcW () { return W[j - 3] ^ W[j - 8] ^ W[j - 14] ^ W[j - 16] }
-  function loop (w, f) {
-    W[j] = w
+  // Return negative clone of `this` % `red modulo`
+  BN.prototype.redNeg = function redNeg () {
+    assert(this.red, 'redNeg works only with red numbers');
+    this.red._verify1(this);
+    return this.red.neg(this);
+  };
 
-    var t = rol(a, 5) + f + e + w + k
+  BN.prototype.redPow = function redPow (num) {
+    assert(this.red && !num.red, 'redPow(normalNum)');
+    this.red._verify1(this);
+    return this.red.pow(this, num);
+  };
 
-    e = d
-    d = c
-    c = rol(b, 30)
-    b = a
-    a = t
-    j++
-  }
+  // Prime numbers with efficient reduction
+  var primes = {
+    k256: null,
+    p224: null,
+    p192: null,
+    p25519: null
+  };
 
-  k = 1518500249
-  while (j < 16) loop(M.readInt32BE(j * 4), (b & c) | ((~b) & d))
-  while (j < 20) loop(calcW(), (b & c) | ((~b) & d))
-  k = 1859775393
-  while (j < 40) loop(calcW(), b ^ c ^ d)
-  k = -1894007588
-  while (j < 60) loop(calcW(), (b & c) | (b & d) | (c & d))
-  k = -899497514
-  while (j < 80) loop(calcW(), b ^ c ^ d)
+  // Pseudo-Mersenne prime
+  function MPrime (name, p) {
+    // P = 2 ^ N - K
+    this.name = name;
+    this.p = new BN(p, 16);
+    this.n = this.p.bitLength();
+    this.k = new BN(1).iushln(this.n).isub(this.p);
 
-  this._a = (a + this._a) | 0
-  this._b = (b + this._b) | 0
-  this._c = (c + this._c) | 0
-  this._d = (d + this._d) | 0
-  this._e = (e + this._e) | 0
-}
+    this.tmp = this._tmp();
+  }
 
-Sha.prototype._hash = function () {
-  var H = new Buffer(20)
+  MPrime.prototype._tmp = function _tmp () {
+    var tmp = new BN(null);
+    tmp.words = new Array(Math.ceil(this.n / 13));
+    return tmp;
+  };
 
-  H.writeInt32BE(this._a | 0, 0)
-  H.writeInt32BE(this._b | 0, 4)
-  H.writeInt32BE(this._c | 0, 8)
-  H.writeInt32BE(this._d | 0, 12)
-  H.writeInt32BE(this._e | 0, 16)
+  MPrime.prototype.ireduce = function ireduce (num) {
+    // Assumes that `num` is less than `P^2`
+    // num = HI * (2 ^ N - K) + HI * K + LO = HI * K + LO (mod P)
+    var r = num;
+    var rlen;
 
-  return H
-}
+    do {
+      this.split(r, this.tmp);
+      r = this.imulK(r);
+      r = r.iadd(this.tmp);
+      rlen = r.bitLength();
+    } while (rlen > this.n);
+
+    var cmp = rlen < this.n ? -1 : r.ucmp(this.p);
+    if (cmp === 0) {
+      r.words[0] = 0;
+      r.length = 1;
+    } else if (cmp > 0) {
+      r.isub(this.p);
+    } else {
+      r.strip();
+    }
 
-module.exports = Sha
+    return r;
+  };
 
+  MPrime.prototype.split = function split (input, out) {
+    input.iushrn(this.n, 0, out);
+  };
 
-}).call(this,require("buffer").Buffer)
-},{"./hash":37,"buffer":7,"inherits":35}],40:[function(require,module,exports){
-(function (Buffer){
-/*
- * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
- * in FIPS PUB 180-1
- * Version 2.1a Copyright Paul Johnston 2000 - 2002.
- * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
- * Distributed under the BSD License
- * See http://pajhome.org.uk/crypt/md5 for details.
- */
+  MPrime.prototype.imulK = function imulK (num) {
+    return num.imul(this.k);
+  };
 
-var inherits = require('inherits')
-var Hash = require('./hash')
+  function K256 () {
+    MPrime.call(
+      this,
+      'k256',
+      'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffffe fffffc2f');
+  }
+  inherits(K256, MPrime);
 
-var W = new Array(80)
+  K256.prototype.split = function split (input, output) {
+    // 256 = 9 * 26 + 22
+    var mask = 0x3fffff;
+
+    var outLen = Math.min(input.length, 9);
+    for (var i = 0; i < outLen; i++) {
+      output.words[i] = input.words[i];
+    }
+    output.length = outLen;
 
-function Sha1 () {
-  this.init()
-  this._w = W
+    if (input.length <= 9) {
+      input.words[0] = 0;
+      input.length = 1;
+      return;
+    }
 
-  Hash.call(this, 64, 56)
-}
+    // Shift by 9 limbs
+    var prev = input.words[9];
+    output.words[output.length++] = prev & mask;
 
-inherits(Sha1, Hash)
+    for (i = 10; i < input.length; i++) {
+      var next = input.words[i] | 0;
+      input.words[i - 10] = ((next & mask) << 4) | (prev >>> 22);
+      prev = next;
+    }
+    prev >>>= 22;
+    input.words[i - 10] = prev;
+    if (prev === 0 && input.length > 10) {
+      input.length -= 10;
+    } else {
+      input.length -= 9;
+    }
+  };
 
-Sha1.prototype.init = function () {
-  this._a = 0x67452301 | 0
-  this._b = 0xefcdab89 | 0
-  this._c = 0x98badcfe | 0
-  this._d = 0x10325476 | 0
-  this._e = 0xc3d2e1f0 | 0
+  K256.prototype.imulK = function imulK (num) {
+    // K = 0x1000003d1 = [ 0x40, 0x3d1 ]
+    num.words[num.length] = 0;
+    num.words[num.length + 1] = 0;
+    num.length += 2;
+
+    // bounded at: 0x40 * 0x3ffffff + 0x3d0 = 0x100000390
+    var lo = 0;
+    for (var i = 0; i < num.length; i++) {
+      var w = num.words[i] | 0;
+      lo += w * 0x3d1;
+      num.words[i] = lo & 0x3ffffff;
+      lo = w * 0x40 + ((lo / 0x4000000) | 0);
+    }
+
+    // Fast length reduction
+    if (num.words[num.length - 1] === 0) {
+      num.length--;
+      if (num.words[num.length - 1] === 0) {
+        num.length--;
+      }
+    }
+    return num;
+  };
 
-  return this
-}
+  function P224 () {
+    MPrime.call(
+      this,
+      'p224',
+      'ffffffff ffffffff ffffffff ffffffff 00000000 00000000 00000001');
+  }
+  inherits(P224, MPrime);
 
-/*
- * Bitwise rotate a 32-bit number to the left.
- */
-function rol (num, cnt) {
-  return (num << cnt) | (num >>> (32 - cnt))
-}
+  function P192 () {
+    MPrime.call(
+      this,
+      'p192',
+      'ffffffff ffffffff ffffffff fffffffe ffffffff ffffffff');
+  }
+  inherits(P192, MPrime);
 
-Sha1.prototype._update = function (M) {
-  var W = this._w
+  function P25519 () {
+    // 2 ^ 255 - 19
+    MPrime.call(
+      this,
+      '25519',
+      '7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffed');
+  }
+  inherits(P25519, MPrime);
 
-  var a = this._a
-  var b = this._b
-  var c = this._c
-  var d = this._d
-  var e = this._e
+  P25519.prototype.imulK = function imulK (num) {
+    // K = 0x13
+    var carry = 0;
+    for (var i = 0; i < num.length; i++) {
+      var hi = (num.words[i] | 0) * 0x13 + carry;
+      var lo = hi & 0x3ffffff;
+      hi >>>= 26;
 
-  var j = 0, k
+      num.words[i] = lo;
+      carry = hi;
+    }
+    if (carry !== 0) {
+      num.words[num.length++] = carry;
+    }
+    return num;
+  };
 
-  function calcW () { return rol(W[j - 3] ^ W[j - 8] ^ W[j - 14] ^ W[j - 16], 1) }
-  function loop (w, f) {
-    W[j] = w
+  // Exported mostly for testing purposes, use plain name instead
+  BN._prime = function prime (name) {
+    // Cached version of prime
+    if (primes[name]) return primes[name];
+
+    var prime;
+    if (name === 'k256') {
+      prime = new K256();
+    } else if (name === 'p224') {
+      prime = new P224();
+    } else if (name === 'p192') {
+      prime = new P192();
+    } else if (name === 'p25519') {
+      prime = new P25519();
+    } else {
+      throw new Error('Unknown prime ' + name);
+    }
+    primes[name] = prime;
 
-    var t = rol(a, 5) + f + e + w + k
+    return prime;
+  };
 
-    e = d
-    d = c
-    c = rol(b, 30)
-    b = a
-    a = t
-    j++
+  //
+  // Base reduction engine
+  //
+  function Red (m) {
+    if (typeof m === 'string') {
+      var prime = BN._prime(m);
+      this.m = prime.p;
+      this.prime = prime;
+    } else {
+      assert(m.gtn(1), 'modulus must be greater than 1');
+      this.m = m;
+      this.prime = null;
+    }
   }
 
-  k = 1518500249
-  while (j < 16) loop(M.readInt32BE(j * 4), (b & c) | ((~b) & d))
-  while (j < 20) loop(calcW(), (b & c) | ((~b) & d))
-  k = 1859775393
-  while (j < 40) loop(calcW(), b ^ c ^ d)
-  k = -1894007588
-  while (j < 60) loop(calcW(), (b & c) | (b & d) | (c & d))
-  k = -899497514
-  while (j < 80) loop(calcW(), b ^ c ^ d)
+  Red.prototype._verify1 = function _verify1 (a) {
+    assert(a.negative === 0, 'red works only with positives');
+    assert(a.red, 'red works only with red numbers');
+  };
 
-  this._a = (a + this._a) | 0
-  this._b = (b + this._b) | 0
-  this._c = (c + this._c) | 0
-  this._d = (d + this._d) | 0
-  this._e = (e + this._e) | 0
-}
+  Red.prototype._verify2 = function _verify2 (a, b) {
+    assert((a.negative | b.negative) === 0, 'red works only with positives');
+    assert(a.red && a.red === b.red,
+      'red works only with red numbers');
+  };
 
-Sha1.prototype._hash = function () {
-  var H = new Buffer(20)
+  Red.prototype.imod = function imod (a) {
+    if (this.prime) return this.prime.ireduce(a)._forceRed(this);
+    return a.umod(this.m)._forceRed(this);
+  };
 
-  H.writeInt32BE(this._a | 0, 0)
-  H.writeInt32BE(this._b | 0, 4)
-  H.writeInt32BE(this._c | 0, 8)
-  H.writeInt32BE(this._d | 0, 12)
-  H.writeInt32BE(this._e | 0, 16)
+  Red.prototype.neg = function neg (a) {
+    if (a.isZero()) {
+      return a.clone();
+    }
 
-  return H
-}
+    return this.m.sub(a)._forceRed(this);
+  };
 
-module.exports = Sha1
+  Red.prototype.add = function add (a, b) {
+    this._verify2(a, b);
 
-}).call(this,require("buffer").Buffer)
-},{"./hash":37,"buffer":7,"inherits":35}],41:[function(require,module,exports){
-(function (Buffer){
-/**
- * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
- * in FIPS 180-2
- * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
- * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
- *
- */
+    var res = a.add(b);
+    if (res.cmp(this.m) >= 0) {
+      res.isub(this.m);
+    }
+    return res._forceRed(this);
+  };
 
-var inherits = require('inherits')
-var Sha256 = require('./sha256')
-var Hash = require('./hash')
+  Red.prototype.iadd = function iadd (a, b) {
+    this._verify2(a, b);
 
-var W = new Array(64)
+    var res = a.iadd(b);
+    if (res.cmp(this.m) >= 0) {
+      res.isub(this.m);
+    }
+    return res;
+  };
 
-function Sha224 () {
-  this.init()
+  Red.prototype.sub = function sub (a, b) {
+    this._verify2(a, b);
 
-  this._w = W // new Array(64)
+    var res = a.sub(b);
+    if (res.cmpn(0) < 0) {
+      res.iadd(this.m);
+    }
+    return res._forceRed(this);
+  };
 
-  Hash.call(this, 64, 56)
-}
+  Red.prototype.isub = function isub (a, b) {
+    this._verify2(a, b);
 
-inherits(Sha224, Sha256)
+    var res = a.isub(b);
+    if (res.cmpn(0) < 0) {
+      res.iadd(this.m);
+    }
+    return res;
+  };
 
-Sha224.prototype.init = function () {
-  this._a = 0xc1059ed8 | 0
-  this._b = 0x367cd507 | 0
-  this._c = 0x3070dd17 | 0
-  this._d = 0xf70e5939 | 0
-  this._e = 0xffc00b31 | 0
-  this._f = 0x68581511 | 0
-  this._g = 0x64f98fa7 | 0
-  this._h = 0xbefa4fa4 | 0
+  Red.prototype.shl = function shl (a, num) {
+    this._verify1(a);
+    return this.imod(a.ushln(num));
+  };
 
-  return this
-}
+  Red.prototype.imul = function imul (a, b) {
+    this._verify2(a, b);
+    return this.imod(a.imul(b));
+  };
 
-Sha224.prototype._hash = function () {
-  var H = new Buffer(28)
+  Red.prototype.mul = function mul (a, b) {
+    this._verify2(a, b);
+    return this.imod(a.mul(b));
+  };
 
-  H.writeInt32BE(this._a, 0)
-  H.writeInt32BE(this._b, 4)
-  H.writeInt32BE(this._c, 8)
-  H.writeInt32BE(this._d, 12)
-  H.writeInt32BE(this._e, 16)
-  H.writeInt32BE(this._f, 20)
-  H.writeInt32BE(this._g, 24)
+  Red.prototype.isqr = function isqr (a) {
+    return this.imul(a, a.clone());
+  };
 
-  return H
-}
+  Red.prototype.sqr = function sqr (a) {
+    return this.mul(a, a);
+  };
 
-module.exports = Sha224
+  Red.prototype.sqrt = function sqrt (a) {
+    if (a.isZero()) return a.clone();
 
-}).call(this,require("buffer").Buffer)
-},{"./hash":37,"./sha256":42,"buffer":7,"inherits":35}],42:[function(require,module,exports){
-(function (Buffer){
-/**
- * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
- * in FIPS 180-2
- * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
- * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
- *
- */
+    var mod3 = this.m.andln(3);
+    assert(mod3 % 2 === 1);
 
-var inherits = require('inherits')
-var Hash = require('./hash')
+    // Fast case
+    if (mod3 === 3) {
+      var pow = this.m.add(new BN(1)).iushrn(2);
+      return this.pow(a, pow);
+    }
 
-var K = [
-  0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
-  0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
-  0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
-  0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
-  0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
-  0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
-  0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
-  0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
-  0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
-  0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
-  0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
-  0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
-  0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
-  0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
-  0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
-  0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2
-]
+    // Tonelli-Shanks algorithm (Totally unoptimized and slow)
+    //
+    // Find Q and S, that Q * 2 ^ S = (P - 1)
+    var q = this.m.subn(1);
+    var s = 0;
+    while (!q.isZero() && q.andln(1) === 0) {
+      s++;
+      q.iushrn(1);
+    }
+    assert(!q.isZero());
 
-var W = new Array(64)
+    var one = new BN(1).toRed(this);
+    var nOne = one.redNeg();
 
-function Sha256 () {
-  this.init()
+    // Find quadratic non-residue
+    // NOTE: Max is such because of generalized Riemann hypothesis.
+    var lpow = this.m.subn(1).iushrn(1);
+    var z = this.m.bitLength();
+    z = new BN(2 * z * z).toRed(this);
 
-  this._w = W // new Array(64)
+    while (this.pow(z, lpow).cmp(nOne) !== 0) {
+      z.redIAdd(nOne);
+    }
 
-  Hash.call(this, 64, 56)
-}
+    var c = this.pow(z, q);
+    var r = this.pow(a, q.addn(1).iushrn(1));
+    var t = this.pow(a, q);
+    var m = s;
+    while (t.cmp(one) !== 0) {
+      var tmp = t;
+      for (var i = 0; tmp.cmp(one) !== 0; i++) {
+        tmp = tmp.redSqr();
+      }
+      assert(i < m);
+      var b = this.pow(c, new BN(1).iushln(m - i - 1));
 
-inherits(Sha256, Hash)
+      r = r.redMul(b);
+      c = b.redSqr();
+      t = t.redMul(c);
+      m = i;
+    }
 
-Sha256.prototype.init = function () {
-  this._a = 0x6a09e667 | 0
-  this._b = 0xbb67ae85 | 0
-  this._c = 0x3c6ef372 | 0
-  this._d = 0xa54ff53a | 0
-  this._e = 0x510e527f | 0
-  this._f = 0x9b05688c | 0
-  this._g = 0x1f83d9ab | 0
-  this._h = 0x5be0cd19 | 0
+    return r;
+  };
 
-  return this
-}
+  Red.prototype.invm = function invm (a) {
+    var inv = a._invmp(this.m);
+    if (inv.negative !== 0) {
+      inv.negative = 0;
+      return this.imod(inv).redNeg();
+    } else {
+      return this.imod(inv);
+    }
+  };
 
-function S (X, n) {
-  return (X >>> n) | (X << (32 - n))
-}
+  Red.prototype.pow = function pow (a, num) {
+    if (num.isZero()) return new BN(1);
+    if (num.cmpn(1) === 0) return a.clone();
 
-function R (X, n) {
-  return (X >>> n)
-}
+    var windowSize = 4;
+    var wnd = new Array(1 << windowSize);
+    wnd[0] = new BN(1).toRed(this);
+    wnd[1] = a;
+    for (var i = 2; i < wnd.length; i++) {
+      wnd[i] = this.mul(wnd[i - 1], a);
+    }
 
-function Ch (x, y, z) {
-  return ((x & y) ^ ((~x) & z))
-}
+    var res = wnd[0];
+    var current = 0;
+    var currentLen = 0;
+    var start = num.bitLength() % 26;
+    if (start === 0) {
+      start = 26;
+    }
 
-function Maj (x, y, z) {
-  return ((x & y) ^ (x & z) ^ (y & z))
-}
+    for (i = num.length - 1; i >= 0; i--) {
+      var word = num.words[i];
+      for (var j = start - 1; j >= 0; j--) {
+        var bit = (word >> j) & 1;
+        if (res !== wnd[0]) {
+          res = this.sqr(res);
+        }
 
-function Sigma0256 (x) {
-  return (S(x, 2) ^ S(x, 13) ^ S(x, 22))
-}
+        if (bit === 0 && current === 0) {
+          currentLen = 0;
+          continue;
+        }
 
-function Sigma1256 (x) {
-  return (S(x, 6) ^ S(x, 11) ^ S(x, 25))
-}
+        current <<= 1;
+        current |= bit;
+        currentLen++;
+        if (currentLen !== windowSize && (i !== 0 || j !== 0)) continue;
 
-function Gamma0256 (x) {
-  return (S(x, 7) ^ S(x, 18) ^ R(x, 3))
-}
+        res = this.mul(res, wnd[current]);
+        currentLen = 0;
+        current = 0;
+      }
+      start = 26;
+    }
 
-function Gamma1256 (x) {
-  return (S(x, 17) ^ S(x, 19) ^ R(x, 10))
-}
+    return res;
+  };
 
-Sha256.prototype._update = function (M) {
-  var W = this._w
+  Red.prototype.convertTo = function convertTo (num) {
+    var r = num.umod(this.m);
 
-  var a = this._a | 0
-  var b = this._b | 0
-  var c = this._c | 0
-  var d = this._d | 0
-  var e = this._e | 0
-  var f = this._f | 0
-  var g = this._g | 0
-  var h = this._h | 0
+    return r === num ? r.clone() : r;
+  };
 
-  var j = 0
+  Red.prototype.convertFrom = function convertFrom (num) {
+    var res = num.clone();
+    res.red = null;
+    return res;
+  };
 
-  function calcW () { return Gamma1256(W[j - 2]) + W[j - 7] + Gamma0256(W[j - 15]) + W[j - 16] }
-  function loop (w) {
-    W[j] = w
+  //
+  // Montgomery method engine
+  //
 
-    var T1 = h + Sigma1256(e) + Ch(e, f, g) + K[j] + w
-    var T2 = Sigma0256(a) + Maj(a, b, c)
+  BN.mont = function mont (num) {
+    return new Mont(num);
+  };
+
+  function Mont (m) {
+    Red.call(this, m);
 
-    h = g
-    g = f
-    f = e
-    e = d + T1
-    d = c
-    c = b
-    b = a
-    a = T1 + T2
+    this.shift = this.m.bitLength();
+    if (this.shift % 26 !== 0) {
+      this.shift += 26 - (this.shift % 26);
+    }
 
-    j++
+    this.r = new BN(1).iushln(this.shift);
+    this.r2 = this.imod(this.r.sqr());
+    this.rinv = this.r._invmp(this.m);
+
+    this.minv = this.rinv.mul(this.r).isubn(1).div(this.m);
+    this.minv = this.minv.umod(this.r);
+    this.minv = this.r.sub(this.minv);
   }
+  inherits(Mont, Red);
 
-  while (j < 16) loop(M.readInt32BE(j * 4))
-  while (j < 64) loop(calcW())
+  Mont.prototype.convertTo = function convertTo (num) {
+    return this.imod(num.ushln(this.shift));
+  };
 
-  this._a = (a + this._a) | 0
-  this._b = (b + this._b) | 0
-  this._c = (c + this._c) | 0
-  this._d = (d + this._d) | 0
-  this._e = (e + this._e) | 0
-  this._f = (f + this._f) | 0
-  this._g = (g + this._g) | 0
-  this._h = (h + this._h) | 0
-}
+  Mont.prototype.convertFrom = function convertFrom (num) {
+    var r = this.imod(num.mul(this.rinv));
+    r.red = null;
+    return r;
+  };
 
-Sha256.prototype._hash = function () {
-  var H = new Buffer(32)
+  Mont.prototype.imul = function imul (a, b) {
+    if (a.isZero() || b.isZero()) {
+      a.words[0] = 0;
+      a.length = 1;
+      return a;
+    }
 
-  H.writeInt32BE(this._a, 0)
-  H.writeInt32BE(this._b, 4)
-  H.writeInt32BE(this._c, 8)
-  H.writeInt32BE(this._d, 12)
-  H.writeInt32BE(this._e, 16)
-  H.writeInt32BE(this._f, 20)
-  H.writeInt32BE(this._g, 24)
-  H.writeInt32BE(this._h, 28)
+    var t = a.imul(b);
+    var c = t.maskn(this.shift).mul(this.minv).imaskn(this.shift).mul(this.m);
+    var u = t.isub(c).iushrn(this.shift);
+    var res = u;
 
-  return H
-}
+    if (u.cmp(this.m) >= 0) {
+      res = u.isub(this.m);
+    } else if (u.cmpn(0) < 0) {
+      res = u.iadd(this.m);
+    }
 
-module.exports = Sha256
+    return res._forceRed(this);
+  };
 
-}).call(this,require("buffer").Buffer)
-},{"./hash":37,"buffer":7,"inherits":35}],43:[function(require,module,exports){
-(function (Buffer){
-var inherits = require('inherits')
-var SHA512 = require('./sha512')
-var Hash = require('./hash')
+  Mont.prototype.mul = function mul (a, b) {
+    if (a.isZero() || b.isZero()) return new BN(0)._forceRed(this);
 
-var W = new Array(160)
+    var t = a.mul(b);
+    var c = t.maskn(this.shift).mul(this.minv).imaskn(this.shift).mul(this.m);
+    var u = t.isub(c).iushrn(this.shift);
+    var res = u;
+    if (u.cmp(this.m) >= 0) {
+      res = u.isub(this.m);
+    } else if (u.cmpn(0) < 0) {
+      res = u.iadd(this.m);
+    }
 
-function Sha384 () {
-  this.init()
-  this._w = W
+    return res._forceRed(this);
+  };
 
-  Hash.call(this, 128, 112)
-}
+  Mont.prototype.invm = function invm (a) {
+    // (AR)^-1 * R^2 = (A^-1 * R^-1) * R^2 = A^-1 * R
+    var res = this.imod(a._invmp(this.m).mul(this.r2));
+    return res._forceRed(this);
+  };
+})(typeof module === 'undefined' || module, this);
 
-inherits(Sha384, SHA512)
+},{}],34:[function(require,module,exports){
+var r;
 
-Sha384.prototype.init = function () {
-  this._a = 0xcbbb9d5d | 0
-  this._b = 0x629a292a | 0
-  this._c = 0x9159015a | 0
-  this._d = 0x152fecd8 | 0
-  this._e = 0x67332667 | 0
-  this._f = 0x8eb44a87 | 0
-  this._g = 0xdb0c2e0d | 0
-  this._h = 0x47b5481d | 0
+module.exports = function rand(len) {
+  if (!r)
+    r = new Rand(null);
 
-  this._al = 0xc1059ed8 | 0
-  this._bl = 0x367cd507 | 0
-  this._cl = 0x3070dd17 | 0
-  this._dl = 0xf70e5939 | 0
-  this._el = 0xffc00b31 | 0
-  this._fl = 0x68581511 | 0
-  this._gl = 0x64f98fa7 | 0
-  this._hl = 0xbefa4fa4 | 0
+  return r.generate(len);
+};
 
-  return this
+function Rand(rand) {
+  this.rand = rand;
 }
+module.exports.Rand = Rand;
 
-Sha384.prototype._hash = function () {
-  var H = new Buffer(48)
+Rand.prototype.generate = function generate(len) {
+  return this._rand(len);
+};
 
-  function writeInt64BE (h, l, offset) {
-    H.writeInt32BE(h, offset)
-    H.writeInt32BE(l, offset + 4)
+if (typeof self === 'object') {
+  if (self.crypto && self.crypto.getRandomValues) {
+    // Modern browsers
+    Rand.prototype._rand = function _rand(n) {
+      var arr = new Uint8Array(n);
+      self.crypto.getRandomValues(arr);
+      return arr;
+    };
+  } else if (self.msCrypto && self.msCrypto.getRandomValues) {
+    // IE
+    Rand.prototype._rand = function _rand(n) {
+      var arr = new Uint8Array(n);
+      self.msCrypto.getRandomValues(arr);
+      return arr;
+    };
+  } else {
+    // Old junk
+    Rand.prototype._rand = function() {
+      throw new Error('Not implemented yet');
+    };
   }
+} else {
+  // Node.js or Web worker with no crypto support
+  try {
+    var crypto = require('crypto');
 
-  writeInt64BE(this._a, this._al, 0)
-  writeInt64BE(this._b, this._bl, 8)
-  writeInt64BE(this._c, this._cl, 16)
-  writeInt64BE(this._d, this._dl, 24)
-  writeInt64BE(this._e, this._el, 32)
-  writeInt64BE(this._f, this._fl, 40)
-
-  return H
+    Rand.prototype._rand = function _rand(n) {
+      return crypto.randomBytes(n);
+    };
+  } catch (e) {
+    // Emulate crypto API using randy
+    Rand.prototype._rand = function _rand(n) {
+      var res = new Uint8Array(n);
+      for (var i = 0; i < res.length; i++)
+        res[i] = this.rand.getByte();
+      return res;
+    };
+  }
 }
 
-module.exports = Sha384
-
-}).call(this,require("buffer").Buffer)
-},{"./hash":37,"./sha512":44,"buffer":7,"inherits":35}],44:[function(require,module,exports){
+},{"crypto":3}],35:[function(require,module,exports){
 (function (Buffer){
+var Transform = require('stream').Transform
 var inherits = require('inherits')
-var Hash = require('./hash')
+var StringDecoder = require('string_decoder').StringDecoder
+module.exports = CipherBase
+inherits(CipherBase, Transform)
+function CipherBase (hashMode) {
+  Transform.call(this)
+  this.hashMode = typeof hashMode === 'string'
+  if (this.hashMode) {
+    this[hashMode] = this._finalOrDigest
+  } else {
+    this.final = this._finalOrDigest
+  }
+  this._decoder = null
+  this._encoding = null
+}
+CipherBase.prototype.update = function (data, inputEnc, outputEnc) {
+  if (typeof data === 'string') {
+    data = new Buffer(data, inputEnc)
+  }
+  var outData = this._update(data)
+  if (this.hashMode) {
+    return this
+  }
+  if (outputEnc) {
+    outData = this._toString(outData, outputEnc)
+  }
+  return outData
+}
 
-var K = [
-  0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd,
-  0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,
-  0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019,
-  0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,
-  0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe,
-  0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,
-  0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1,
-  0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,
-  0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3,
-  0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,
-  0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483,
-  0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,
-  0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210,
-  0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,
-  0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725,
-  0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,
-  0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926,
-  0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,
-  0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8,
-  0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,
-  0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001,
-  0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,
-  0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910,
-  0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,
-  0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53,
-  0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,
-  0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb,
-  0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,
-  0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60,
-  0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,
-  0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9,
-  0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,
-  0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207,
-  0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,
-  0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6,
-  0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,
-  0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493,
-  0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,
-  0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a,
-  0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817
-]
+CipherBase.prototype.setAutoPadding = function () {}
 
-var W = new Array(160)
+CipherBase.prototype.getAuthTag = function () {
+  throw new Error('trying to get auth tag in unsupported state')
+}
 
-function Sha512 () {
-  this.init()
-  this._w = W
+CipherBase.prototype.setAuthTag = function () {
+  throw new Error('trying to set auth tag in unsupported state')
+}
 
-  Hash.call(this, 128, 112)
+CipherBase.prototype.setAAD = function () {
+  throw new Error('trying to set aad in unsupported state')
 }
 
-inherits(Sha512, Hash)
+CipherBase.prototype._transform = function (data, _, next) {
+  var err
+  try {
+    if (this.hashMode) {
+      this._update(data)
+    } else {
+      this.push(this._update(data))
+    }
+  } catch (e) {
+    err = e
+  } finally {
+    next(err)
+  }
+}
+CipherBase.prototype._flush = function (done) {
+  var err
+  try {
+    this.push(this._final())
+  } catch (e) {
+    err = e
+  } finally {
+    done(err)
+  }
+}
+CipherBase.prototype._finalOrDigest = function (outputEnc) {
+  var outData = this._final() || new Buffer('')
+  if (outputEnc) {
+    outData = this._toString(outData, outputEnc, true)
+  }
+  return outData
+}
 
-Sha512.prototype.init = function () {
-  this._a = 0x6a09e667 | 0
-  this._b = 0xbb67ae85 | 0
-  this._c = 0x3c6ef372 | 0
-  this._d = 0xa54ff53a | 0
-  this._e = 0x510e527f | 0
-  this._f = 0x9b05688c | 0
-  this._g = 0x1f83d9ab | 0
-  this._h = 0x5be0cd19 | 0
+CipherBase.prototype._toString = function (value, enc, fin) {
+  if (!this._decoder) {
+    this._decoder = new StringDecoder(enc)
+    this._encoding = enc
+  }
+  if (this._encoding !== enc) {
+    throw new Error('can\'t switch encodings')
+  }
+  var out = this._decoder.write(value)
+  if (fin) {
+    out += this._decoder.end()
+  }
+  return out
+}
 
-  this._al = 0xf3bcc908 | 0
-  this._bl = 0x84caa73b | 0
-  this._cl = 0xfe94f82b | 0
-  this._dl = 0x5f1d36f1 | 0
-  this._el = 0xade682d1 | 0
-  this._fl = 0x2b3e6c1f | 0
-  this._gl = 0xfb41bd6b | 0
-  this._hl = 0x137e2179 | 0
+}).call(this,require("buffer").Buffer)
+},{"buffer":5,"inherits":63,"stream":25,"string_decoder":26}],36:[function(require,module,exports){
+(function (Buffer){
+'use strict';
+var inherits = require('inherits')
+var md5 = require('./md5')
+var rmd160 = require('ripemd160')
+var sha = require('sha.js')
 
-  return this
+var Base = require('cipher-base')
+
+function HashNoConstructor(hash) {
+  Base.call(this, 'digest')
+
+  this._hash = hash
+  this.buffers = []
 }
 
-function S (X, Xl, n) {
-  return (X >>> n) | (Xl << (32 - n))
+inherits(HashNoConstructor, Base)
+
+HashNoConstructor.prototype._update = function (data) {
+  this.buffers.push(data)
 }
 
-function Ch (x, y, z) {
-  return ((x & y) ^ ((~x) & z))
+HashNoConstructor.prototype._final = function () {
+  var buf = Buffer.concat(this.buffers)
+  var r = this._hash(buf)
+  this.buffers = null
+
+  return r
 }
 
-function Maj (x, y, z) {
-  return ((x & y) ^ (x & z) ^ (y & z))
+function Hash(hash) {
+  Base.call(this, 'digest')
+
+  this._hash = hash
 }
 
-Sha512.prototype._update = function (M) {
-  var W = this._w
+inherits(Hash, Base)
 
-  var a = this._a | 0
-  var b = this._b | 0
-  var c = this._c | 0
-  var d = this._d | 0
-  var e = this._e | 0
-  var f = this._f | 0
-  var g = this._g | 0
-  var h = this._h | 0
+Hash.prototype._update = function (data) {
+  this._hash.update(data)
+}
 
-  var al = this._al | 0
-  var bl = this._bl | 0
-  var cl = this._cl | 0
-  var dl = this._dl | 0
-  var el = this._el | 0
-  var fl = this._fl | 0
-  var gl = this._gl | 0
-  var hl = this._hl | 0
+Hash.prototype._final = function () {
+  return this._hash.digest()
+}
 
-  var i = 0, j = 0
-  var Wi, Wil
-  function calcW () {
-    var x = W[j - 15 * 2]
-    var xl = W[j - 15 * 2 + 1]
-    var gamma0 = S(x, xl, 1) ^ S(x, xl, 8) ^ (x >>> 7)
-    var gamma0l = S(xl, x, 1) ^ S(xl, x, 8) ^ S(xl, x, 7)
+module.exports = function createHash (alg) {
+  alg = alg.toLowerCase()
+  if ('md5' === alg) return new HashNoConstructor(md5)
+  if ('rmd160' === alg || 'ripemd160' === alg) return new HashNoConstructor(rmd160)
 
-    x = W[j - 2 * 2]
-    xl = W[j - 2 * 2 + 1]
-    var gamma1 = S(x, xl, 19) ^ S(xl, x, 29) ^ (x >>> 6)
-    var gamma1l = S(xl, x, 19) ^ S(x, xl, 29) ^ S(xl, x, 6)
+  return new Hash(sha(alg))
+}
 
-    // W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16]
-    var Wi7 = W[j - 7 * 2]
-    var Wi7l = W[j - 7 * 2 + 1]
+}).call(this,require("buffer").Buffer)
+},{"./md5":38,"buffer":5,"cipher-base":35,"inherits":63,"ripemd160":71,"sha.js":80}],37:[function(require,module,exports){
+(function (Buffer){
+'use strict';
+var intSize = 4;
+var zeroBuffer = new Buffer(intSize); zeroBuffer.fill(0);
+var chrsz = 8;
 
-    var Wi16 = W[j - 16 * 2]
-    var Wi16l = W[j - 16 * 2 + 1]
+function toArray(buf, bigEndian) {
+  if ((buf.length % intSize) !== 0) {
+    var len = buf.length + (intSize - (buf.length % intSize));
+    buf = Buffer.concat([buf, zeroBuffer], len);
+  }
 
-    Wil = gamma0l + Wi7l
-    Wi = gamma0 + Wi7 + ((Wil >>> 0) < (gamma0l >>> 0) ? 1 : 0)
-    Wil = Wil + gamma1l
-    Wi = Wi + gamma1 + ((Wil >>> 0) < (gamma1l >>> 0) ? 1 : 0)
-    Wil = Wil + Wi16l
-    Wi = Wi + Wi16 + ((Wil >>> 0) < (Wi16l >>> 0) ? 1 : 0)
+  var arr = [];
+  var fn = bigEndian ? buf.readInt32BE : buf.readInt32LE;
+  for (var i = 0; i < buf.length; i += intSize) {
+    arr.push(fn.call(buf, i));
   }
+  return arr;
+}
 
-  function loop () {
-    W[j] = Wi
-    W[j + 1] = Wil
+function toBuffer(arr, size, bigEndian) {
+  var buf = new Buffer(size);
+  var fn = bigEndian ? buf.writeInt32BE : buf.writeInt32LE;
+  for (var i = 0; i < arr.length; i++) {
+    fn.call(buf, arr[i], i * 4, true);
+  }
+  return buf;
+}
 
-    var maj = Maj(a, b, c)
-    var majl = Maj(al, bl, cl)
+function hash(buf, fn, hashSize, bigEndian) {
+  if (!Buffer.isBuffer(buf)) buf = new Buffer(buf);
+  var arr = fn(toArray(buf, bigEndian), buf.length * chrsz);
+  return toBuffer(arr, hashSize, bigEndian);
+}
+exports.hash = hash;
+}).call(this,require("buffer").Buffer)
+},{"buffer":5}],38:[function(require,module,exports){
+'use strict';
+/*
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
 
-    var sigma0h = S(a, al, 28) ^ S(al, a, 2) ^ S(al, a, 7)
-    var sigma0l = S(al, a, 28) ^ S(a, al, 2) ^ S(a, al, 7)
-    var sigma1h = S(e, el, 14) ^ S(e, el, 18) ^ S(el, e, 9)
-    var sigma1l = S(el, e, 14) ^ S(el, e, 18) ^ S(e, el, 9)
+var helpers = require('./helpers');
 
-    // t1 = h + sigma1 + ch + K[i] + W[i]
-    var Ki = K[j]
-    var Kil = K[j + 1]
+/*
+ * Calculate the MD5 of an array of little-endian words, and a bit length
+ */
+function core_md5(x, len)
+{
+  /* append padding */
+  x[len >> 5] |= 0x80 << ((len) % 32);
+  x[(((len + 64) >>> 9) << 4) + 14] = len;
 
-    var ch = Ch(e, f, g)
-    var chl = Ch(el, fl, gl)
+  var a =  1732584193;
+  var b = -271733879;
+  var c = -1732584194;
+  var d =  271733878;
 
-    var t1l = hl + sigma1l
-    var t1 = h + sigma1h + ((t1l >>> 0) < (hl >>> 0) ? 1 : 0)
-    t1l = t1l + chl
-    t1 = t1 + ch + ((t1l >>> 0) < (chl >>> 0) ? 1 : 0)
-    t1l = t1l + Kil
-    t1 = t1 + Ki + ((t1l >>> 0) < (Kil >>> 0) ? 1 : 0)
-    t1l = t1l + Wil
-    t1 = t1 + Wi + ((t1l >>> 0) < (Wil >>> 0) ? 1 : 0)
+  for(var i = 0; i < x.length; i += 16)
+  {
+    var olda = a;
+    var oldb = b;
+    var oldc = c;
+    var oldd = d;
 
-    // t2 = sigma0 + maj
-    var t2l = sigma0l + majl
-    var t2 = sigma0h + maj + ((t2l >>> 0) < (sigma0l >>> 0) ? 1 : 0)
+    a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
+    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
+    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
+    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
+    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
+    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
+    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
+    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
+    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
+    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
+    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
+    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
+    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
+    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
+    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
+    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);
 
-    h = g
-    hl = gl
-    g = f
-    gl = fl
-    f = e
-    fl = el
-    el = (dl + t1l) | 0
-    e = (d + t1 + ((el >>> 0) < (dl >>> 0) ? 1 : 0)) | 0
-    d = c
-    dl = cl
-    c = b
-    cl = bl
-    b = a
-    bl = al
-    al = (t1l + t2l) | 0
-    a = (t1 + t2 + ((al >>> 0) < (t1l >>> 0) ? 1 : 0)) | 0
+    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
+    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
+    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
+    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
+    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
+    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
+    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
+    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
+    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
+    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
+    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
+    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
+    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
+    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
+    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
+    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
 
-    i++
-    j += 2
-  }
+    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
+    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
+    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
+    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
+    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
+    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
+    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
+    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
+    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
+    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
+    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
+    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
+    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
+    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
+    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
+    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
 
-  while (i < 16) {
-    Wi = M.readInt32BE(j * 4)
-    Wil = M.readInt32BE(j * 4 + 4)
+    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
+    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
+    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
+    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
+    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
+    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
+    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
+    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
+    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
+    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
+    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
+    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
+    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
+    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
+    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
+    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
 
-    loop()
+    a = safe_add(a, olda);
+    b = safe_add(b, oldb);
+    c = safe_add(c, oldc);
+    d = safe_add(d, oldd);
   }
+  return Array(a, b, c, d);
 
-  while (i < 80) {
-    calcW()
-    loop()
-  }
+}
 
-  this._al = (this._al + al) | 0
-  this._bl = (this._bl + bl) | 0
-  this._cl = (this._cl + cl) | 0
-  this._dl = (this._dl + dl) | 0
-  this._el = (this._el + el) | 0
-  this._fl = (this._fl + fl) | 0
-  this._gl = (this._gl + gl) | 0
-  this._hl = (this._hl + hl) | 0
+/*
+ * These functions implement the four basic operations the algorithm uses.
+ */
+function md5_cmn(q, a, b, x, s, t)
+{
+  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
+}
+function md5_ff(a, b, c, d, x, s, t)
+{
+  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
+}
+function md5_gg(a, b, c, d, x, s, t)
+{
+  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
+}
+function md5_hh(a, b, c, d, x, s, t)
+{
+  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+}
+function md5_ii(a, b, c, d, x, s, t)
+{
+  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
+}
 
-  this._a = (this._a + a + ((this._al >>> 0) < (al >>> 0) ? 1 : 0)) | 0
-  this._b = (this._b + b + ((this._bl >>> 0) < (bl >>> 0) ? 1 : 0)) | 0
-  this._c = (this._c + c + ((this._cl >>> 0) < (cl >>> 0) ? 1 : 0)) | 0
-  this._d = (this._d + d + ((this._dl >>> 0) < (dl >>> 0) ? 1 : 0)) | 0
-  this._e = (this._e + e + ((this._el >>> 0) < (el >>> 0) ? 1 : 0)) | 0
-  this._f = (this._f + f + ((this._fl >>> 0) < (fl >>> 0) ? 1 : 0)) | 0
-  this._g = (this._g + g + ((this._gl >>> 0) < (gl >>> 0) ? 1 : 0)) | 0
-  this._h = (this._h + h + ((this._hl >>> 0) < (hl >>> 0) ? 1 : 0)) | 0
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safe_add(x, y)
+{
+  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return (msw << 16) | (lsw & 0xFFFF);
 }
 
-Sha512.prototype._hash = function () {
-  var H = new Buffer(64)
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function bit_rol(num, cnt)
+{
+  return (num << cnt) | (num >>> (32 - cnt));
+}
 
-  function writeInt64BE (h, l, offset) {
-    H.writeInt32BE(h, offset)
-    H.writeInt32BE(l, offset + 4)
-  }
+module.exports = function md5(buf) {
+  return helpers.hash(buf, core_md5, 16);
+};
+},{"./helpers":37}],39:[function(require,module,exports){
+'use strict';
 
-  writeInt64BE(this._a, this._al, 0)
-  writeInt64BE(this._b, this._bl, 8)
-  writeInt64BE(this._c, this._cl, 16)
-  writeInt64BE(this._d, this._dl, 24)
-  writeInt64BE(this._e, this._el, 32)
-  writeInt64BE(this._f, this._fl, 40)
-  writeInt64BE(this._g, this._gl, 48)
-  writeInt64BE(this._h, this._hl, 56)
+var elliptic = exports;
 
-  return H
-}
+elliptic.version = require('../package.json').version;
+elliptic.utils = require('./elliptic/utils');
+elliptic.rand = require('brorand');
+elliptic.hmacDRBG = require('./elliptic/hmac-drbg');
+elliptic.curve = require('./elliptic/curve');
+elliptic.curves = require('./elliptic/curves');
 
-module.exports = Sha512
+// Protocols
+elliptic.ec = require('./elliptic/ec');
+elliptic.eddsa = require('./elliptic/eddsa');
 
-}).call(this,require("buffer").Buffer)
-},{"./hash":37,"buffer":7,"inherits":35}],45:[function(require,module,exports){
-(function (Buffer){
+},{"../package.json":55,"./elliptic/curve":42,"./elliptic/curves":45,"./elliptic/ec":46,"./elliptic/eddsa":49,"./elliptic/hmac-drbg":52,"./elliptic/utils":54,"brorand":34}],40:[function(require,module,exports){
 'use strict';
-var createHash = require('create-hash/browser');
-var inherits = require('inherits')
 
-var Transform = require('stream').Transform
+var BN = require('bn.js');
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
+var getNAF = utils.getNAF;
+var getJSF = utils.getJSF;
+var assert = utils.assert;
+
+function BaseCurve(type, conf) {
+  this.type = type;
+  this.p = new BN(conf.p, 16);
+
+  // Use Montgomery, when there is no fast reduction for the prime
+  this.red = conf.prime ? BN.red(conf.prime) : BN.mont(this.p);
+
+  // Useful for many curves
+  this.zero = new BN(0).toRed(this.red);
+  this.one = new BN(1).toRed(this.red);
+  this.two = new BN(2).toRed(this.red);
+
+  // Curve configuration, optional
+  this.n = conf.n && new BN(conf.n, 16);
+  this.g = conf.g && this.pointFromJSON(conf.g, conf.gRed);
+
+  // Temporary arrays
+  this._wnafT1 = new Array(4);
+  this._wnafT2 = new Array(4);
+  this._wnafT3 = new Array(4);
+  this._wnafT4 = new Array(4);
+
+  // Generalized Greg Maxwell's trick
+  var adjustCount = this.n && this.p.div(this.n);
+  if (!adjustCount || adjustCount.cmpn(100) > 0) {
+    this.redN = null;
+  } else {
+    this._maxwellTrick = true;
+    this.redN = this.n.toRed(this.red);
+  }
+}
+module.exports = BaseCurve;
 
-var ZEROS = new Buffer(128)
-ZEROS.fill(0)
+BaseCurve.prototype.point = function point() {
+  throw new Error('Not implemented');
+};
 
-function Hmac(alg, key) {
-  Transform.call(this)
+BaseCurve.prototype.validate = function validate() {
+  throw new Error('Not implemented');
+};
 
-  if (typeof key === 'string') {
-    key = new Buffer(key)
+BaseCurve.prototype._fixedNafMul = function _fixedNafMul(p, k) {
+  assert(p.precomputed);
+  var doubles = p._getDoubles();
+
+  var naf = getNAF(k, 1);
+  var I = (1 << (doubles.step + 1)) - (doubles.step % 2 === 0 ? 2 : 1);
+  I /= 3;
+
+  // Translate into more windowed form
+  var repr = [];
+  for (var j = 0; j < naf.length; j += doubles.step) {
+    var nafW = 0;
+    for (var k = j + doubles.step - 1; k >= j; k--)
+      nafW = (nafW << 1) + naf[k];
+    repr.push(nafW);
   }
 
-  var blocksize = (alg === 'sha512' || alg === 'sha384') ? 128 : 64
+  var a = this.jpoint(null, null, null);
+  var b = this.jpoint(null, null, null);
+  for (var i = I; i > 0; i--) {
+    for (var j = 0; j < repr.length; j++) {
+      var nafW = repr[j];
+      if (nafW === i)
+        b = b.mixedAdd(doubles.points[j]);
+      else if (nafW === -i)
+        b = b.mixedAdd(doubles.points[j].neg());
+    }
+    a = a.add(b);
+  }
+  return a.toP();
+};
 
-  this._alg = alg
-  this._key = key
+BaseCurve.prototype._wnafMul = function _wnafMul(p, k) {
+  var w = 4;
 
-  if (key.length > blocksize) {
-    key = createHash(alg).update(key).digest()
+  // Precompute window
+  var nafPoints = p._getNAFPoints(w);
+  w = nafPoints.wnd;
+  var wnd = nafPoints.points;
 
-  } else if (key.length < blocksize) {
-    key = Buffer.concat([key, ZEROS], blocksize)
-  }
+  // Get NAF form
+  var naf = getNAF(k, w);
 
-  var ipad = this._ipad = new Buffer(blocksize)
-  var opad = this._opad = new Buffer(blocksize)
+  // Add `this`*(N+1) for every w-NAF index
+  var acc = this.jpoint(null, null, null);
+  for (var i = naf.length - 1; i >= 0; i--) {
+    // Count zeroes
+    for (var k = 0; i >= 0 && naf[i] === 0; i--)
+      k++;
+    if (i >= 0)
+      k++;
+    acc = acc.dblp(k);
 
-  for (var i = 0; i < blocksize; i++) {
-    ipad[i] = key[i] ^ 0x36
-    opad[i] = key[i] ^ 0x5C
+    if (i < 0)
+      break;
+    var z = naf[i];
+    assert(z !== 0);
+    if (p.type === 'affine') {
+      // J +- P
+      if (z > 0)
+        acc = acc.mixedAdd(wnd[(z - 1) >> 1]);
+      else
+        acc = acc.mixedAdd(wnd[(-z - 1) >> 1].neg());
+    } else {
+      // J +- J
+      if (z > 0)
+        acc = acc.add(wnd[(z - 1) >> 1]);
+      else
+        acc = acc.add(wnd[(-z - 1) >> 1].neg());
+    }
   }
+  return p.type === 'affine' ? acc.toP() : acc;
+};
 
-  this._hash = createHash(alg).update(ipad)
-}
-
-inherits(Hmac, Transform)
+BaseCurve.prototype._wnafMulAdd = function _wnafMulAdd(defW,
+                                                       points,
+                                                       coeffs,
+                                                       len,
+                                                       jacobianResult) {
+  var wndWidth = this._wnafT1;
+  var wnd = this._wnafT2;
+  var naf = this._wnafT3;
+
+  // Fill all arrays
+  var max = 0;
+  for (var i = 0; i < len; i++) {
+    var p = points[i];
+    var nafPoints = p._getNAFPoints(defW);
+    wndWidth[i] = nafPoints.wnd;
+    wnd[i] = nafPoints.points;
+  }
+
+  // Comb small window NAFs
+  for (var i = len - 1; i >= 1; i -= 2) {
+    var a = i - 1;
+    var b = i;
+    if (wndWidth[a] !== 1 || wndWidth[b] !== 1) {
+      naf[a] = getNAF(coeffs[a], wndWidth[a]);
+      naf[b] = getNAF(coeffs[b], wndWidth[b]);
+      max = Math.max(naf[a].length, max);
+      max = Math.max(naf[b].length, max);
+      continue;
+    }
 
-Hmac.prototype.update = function (data, enc) {
-  this._hash.update(data, enc)
+    var comb = [
+      points[a], /* 1 */
+      null, /* 3 */
+      null, /* 5 */
+      points[b] /* 7 */
+    ];
+
+    // Try to avoid Projective points, if possible
+    if (points[a].y.cmp(points[b].y) === 0) {
+      comb[1] = points[a].add(points[b]);
+      comb[2] = points[a].toJ().mixedAdd(points[b].neg());
+    } else if (points[a].y.cmp(points[b].y.redNeg()) === 0) {
+      comb[1] = points[a].toJ().mixedAdd(points[b]);
+      comb[2] = points[a].add(points[b].neg());
+    } else {
+      comb[1] = points[a].toJ().mixedAdd(points[b]);
+      comb[2] = points[a].toJ().mixedAdd(points[b].neg());
+    }
 
-  return this
-}
+    var index = [
+      -3, /* -1 -1 */
+      -1, /* -1 0 */
+      -5, /* -1 1 */
+      -7, /* 0 -1 */
+      0, /* 0 0 */
+      7, /* 0 1 */
+      5, /* 1 -1 */
+      1, /* 1 0 */
+      3  /* 1 1 */
+    ];
 
-Hmac.prototype._transform = function (data, _, next) {
-  this._hash.update(data)
+    var jsf = getJSF(coeffs[a], coeffs[b]);
+    max = Math.max(jsf[0].length, max);
+    naf[a] = new Array(max);
+    naf[b] = new Array(max);
+    for (var j = 0; j < max; j++) {
+      var ja = jsf[0][j] | 0;
+      var jb = jsf[1][j] | 0;
 
-  next()
-}
+      naf[a][j] = index[(ja + 1) * 3 + (jb + 1)];
+      naf[b][j] = 0;
+      wnd[a] = comb;
+    }
+  }
 
-Hmac.prototype._flush = function (next) {
-  this.push(this.digest())
+  var acc = this.jpoint(null, null, null);
+  var tmp = this._wnafT4;
+  for (var i = max; i >= 0; i--) {
+    var k = 0;
 
-  next()
-}
+    while (i >= 0) {
+      var zero = true;
+      for (var j = 0; j < len; j++) {
+        tmp[j] = naf[j][i] | 0;
+        if (tmp[j] !== 0)
+          zero = false;
+      }
+      if (!zero)
+        break;
+      k++;
+      i--;
+    }
+    if (i >= 0)
+      k++;
+    acc = acc.dblp(k);
+    if (i < 0)
+      break;
 
-Hmac.prototype.digest = function (enc) {
-  var h = this._hash.digest()
+    for (var j = 0; j < len; j++) {
+      var z = tmp[j];
+      var p;
+      if (z === 0)
+        continue;
+      else if (z > 0)
+        p = wnd[j][(z - 1) >> 1];
+      else if (z < 0)
+        p = wnd[j][(-z - 1) >> 1].neg();
+
+      if (p.type === 'affine')
+        acc = acc.mixedAdd(p);
+      else
+        acc = acc.add(p);
+    }
+  }
+  // Zeroify references
+  for (var i = 0; i < len; i++)
+    wnd[i] = null;
 
-  return createHash(this._alg).update(this._opad).update(h).digest(enc)
-}
+  if (jacobianResult)
+    return acc;
+  else
+    return acc.toP();
+};
 
-module.exports = function createHmac(alg, key) {
-  return new Hmac(alg, key)
+function BasePoint(curve, type) {
+  this.curve = curve;
+  this.type = type;
+  this.precomputed = null;
 }
+BaseCurve.BasePoint = BasePoint;
 
-}).call(this,require("buffer").Buffer)
-},{"buffer":7,"create-hash/browser":32,"inherits":46,"stream":26}],46:[function(require,module,exports){
-arguments[4][12][0].apply(exports,arguments)
-},{"dup":12}],47:[function(require,module,exports){
-var assert = require('assert')
-var BigInteger = require('bigi')
+BasePoint.prototype.eq = function eq(/*other*/) {
+  throw new Error('Not implemented');
+};
 
-var Point = require('./point')
+BasePoint.prototype.validate = function validate() {
+  return this.curve.validate(this);
+};
 
-function Curve(p, a, b, Gx, Gy, n, h) {
-  this.p = p
-  this.a = a
-  this.b = b
-  this.G = Point.fromAffine(this, Gx, Gy)
-  this.n = n
-  this.h = h
+BaseCurve.prototype.decodePoint = function decodePoint(bytes, enc) {
+  bytes = utils.toArray(bytes, enc);
 
-  this.infinity = new Point(this, null, null, BigInteger.ZERO)
+  var len = this.p.byteLength();
 
-  // result caching
-  this.pOverFour = p.add(BigInteger.ONE).shiftRight(2)
-}
+  // uncompressed, hybrid-odd, hybrid-even
+  if ((bytes[0] === 0x04 || bytes[0] === 0x06 || bytes[0] === 0x07) &&
+      bytes.length - 1 === 2 * len) {
+    if (bytes[0] === 0x06)
+      assert(bytes[bytes.length - 1] % 2 === 0);
+    else if (bytes[0] === 0x07)
+      assert(bytes[bytes.length - 1] % 2 === 1);
 
-Curve.prototype.pointFromX = function(isOdd, x) {
-  var alpha = x.pow(3).add(this.a.multiply(x)).add(this.b).mod(this.p)
-  var beta = alpha.modPow(this.pOverFour, this.p) // XXX: not compatible with all curves
+    var res =  this.point(bytes.slice(1, 1 + len),
+                          bytes.slice(1 + len, 1 + 2 * len));
 
-  var y = beta
-  if (beta.isEven() ^ !isOdd) {
-    y = this.p.subtract(y) // -y % p
+    return res;
+  } else if ((bytes[0] === 0x02 || bytes[0] === 0x03) &&
+              bytes.length - 1 === len) {
+    return this.pointFromX(bytes.slice(1, 1 + len), bytes[0] === 0x03);
   }
+  throw new Error('Unknown point format');
+};
 
-  return Point.fromAffine(this, x, y)
-}
+BasePoint.prototype.encodeCompressed = function encodeCompressed(enc) {
+  return this.encode(enc, true);
+};
 
-Curve.prototype.isInfinity = function(Q) {
-  if (Q === this.infinity) return true
+BasePoint.prototype._encode = function _encode(compact) {
+  var len = this.curve.p.byteLength();
+  var x = this.getX().toArray('be', len);
 
-  return Q.z.signum() === 0 && Q.y.signum() !== 0
-}
+  if (compact)
+    return [ this.getY().isEven() ? 0x02 : 0x03 ].concat(x);
 
-Curve.prototype.isOnCurve = function(Q) {
-  if (this.isInfinity(Q)) return true
+  return [ 0x04 ].concat(x, this.getY().toArray('be', len)) ;
+};
 
-  var x = Q.affineX
-  var y = Q.affineY
-  var a = this.a
-  var b = this.b
-  var p = this.p
+BasePoint.prototype.encode = function encode(enc, compact) {
+  return utils.encode(this._encode(compact), enc);
+};
 
-  // Check that xQ and yQ are integers in the interval [0, p - 1]
-  if (x.signum() < 0 || x.compareTo(p) >= 0) return false
-  if (y.signum() < 0 || y.compareTo(p) >= 0) return false
+BasePoint.prototype.precompute = function precompute(power) {
+  if (this.precomputed)
+    return this;
 
-  // and check that y^2 = x^3 + ax + b (mod p)
-  var lhs = y.square().mod(p)
-  var rhs = x.pow(3).add(a.multiply(x)).add(b).mod(p)
-  return lhs.equals(rhs)
-}
+  var precomputed = {
+    doubles: null,
+    naf: null,
+    beta: null
+  };
+  precomputed.naf = this._getNAFPoints(8);
+  precomputed.doubles = this._getDoubles(4, power);
+  precomputed.beta = this._getBeta();
+  this.precomputed = precomputed;
 
-/**
- * Validate an elliptic curve point.
- *
- * See SEC 1, section 3.2.2.1: Elliptic Curve Public Key Validation Primitive
- */
-Curve.prototype.validate = function(Q) {
-  // Check Q != O
-  assert(!this.isInfinity(Q), 'Point is at infinity')
-  assert(this.isOnCurve(Q), 'Point is not on the curve')
+  return this;
+};
 
-  // Check nQ = O (where Q is a scalar multiple of G)
-  var nQ = Q.multiply(this.n)
-  assert(this.isInfinity(nQ), 'Point is not a scalar multiple of G')
+BasePoint.prototype._hasDoubles = function _hasDoubles(k) {
+  if (!this.precomputed)
+    return false;
 
-  return true
-}
+  var doubles = this.precomputed.doubles;
+  if (!doubles)
+    return false;
 
-module.exports = Curve
+  return doubles.points.length >= Math.ceil((k.bitLength() + 1) / doubles.step);
+};
 
-},{"./point":51,"assert":5,"bigi":3}],48:[function(require,module,exports){
-module.exports={
-  "secp128r1": {
-    "p": "fffffffdffffffffffffffffffffffff",
-    "a": "fffffffdfffffffffffffffffffffffc",
-    "b": "e87579c11079f43dd824993c2cee5ed3",
-    "n": "fffffffe0000000075a30d1b9038a115",
-    "h": "01",
-    "Gx": "161ff7528b899b2d0c28607ca52c5b86",
-    "Gy": "cf5ac8395bafeb13c02da292dded7a83"
-  },
-  "secp160k1": {
-    "p": "fffffffffffffffffffffffffffffffeffffac73",
-    "a": "00",
-    "b": "07",
-    "n": "0100000000000000000001b8fa16dfab9aca16b6b3",
-    "h": "01",
-    "Gx": "3b4c382ce37aa192a4019e763036f4f5dd4d7ebb",
-    "Gy": "938cf935318fdced6bc28286531733c3f03c4fee"
-  },
-  "secp160r1": {
-    "p": "ffffffffffffffffffffffffffffffff7fffffff",
-    "a": "ffffffffffffffffffffffffffffffff7ffffffc",
-    "b": "1c97befc54bd7a8b65acf89f81d4d4adc565fa45",
-    "n": "0100000000000000000001f4c8f927aed3ca752257",
-    "h": "01",
-    "Gx": "4a96b5688ef573284664698968c38bb913cbfc82",
-    "Gy": "23a628553168947d59dcc912042351377ac5fb32"
-  },
-  "secp192k1": {
-    "p": "fffffffffffffffffffffffffffffffffffffffeffffee37",
-    "a": "00",
-    "b": "03",
-    "n": "fffffffffffffffffffffffe26f2fc170f69466a74defd8d",
-    "h": "01",
-    "Gx": "db4ff10ec057e9ae26b07d0280b7f4341da5d1b1eae06c7d",
-    "Gy": "9b2f2f6d9c5628a7844163d015be86344082aa88d95e2f9d"
-  },
-  "secp192r1": {
-    "p": "fffffffffffffffffffffffffffffffeffffffffffffffff",
-    "a": "fffffffffffffffffffffffffffffffefffffffffffffffc",
-    "b": "64210519e59c80e70fa7e9ab72243049feb8deecc146b9b1",
-    "n": "ffffffffffffffffffffffff99def836146bc9b1b4d22831",
-    "h": "01",
-    "Gx": "188da80eb03090f67cbf20eb43a18800f4ff0afd82ff1012",
-    "Gy": "07192b95ffc8da78631011ed6b24cdd573f977a11e794811"
-  },
-  "secp256k1": {
-    "p": "fffffffffffffffffffffffffffffffffffffffffffffffffffffffefffffc2f",
-    "a": "00",
-    "b": "07",
-    "n": "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141",
-    "h": "01",
-    "Gx": "79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798",
-    "Gy": "483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8"
-  },
-  "secp256r1": {
-    "p": "ffffffff00000001000000000000000000000000ffffffffffffffffffffffff",
-    "a": "ffffffff00000001000000000000000000000000fffffffffffffffffffffffc",
-    "b": "5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b",
-    "n": "ffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551",
-    "h": "01",
-    "Gx": "6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296",
-    "Gy": "4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5"
+BasePoint.prototype._getDoubles = function _getDoubles(step, power) {
+  if (this.precomputed && this.precomputed.doubles)
+    return this.precomputed.doubles;
+
+  var doubles = [ this ];
+  var acc = this;
+  for (var i = 0; i < power; i += step) {
+    for (var j = 0; j < step; j++)
+      acc = acc.dbl();
+    doubles.push(acc);
   }
-}
+  return {
+    step: step,
+    points: doubles
+  };
+};
 
-},{}],49:[function(require,module,exports){
-var Point = require('./point')
-var Curve = require('./curve')
+BasePoint.prototype._getNAFPoints = function _getNAFPoints(wnd) {
+  if (this.precomputed && this.precomputed.naf)
+    return this.precomputed.naf;
 
-var getCurveByName = require('./names')
+  var res = [ this ];
+  var max = (1 << wnd) - 1;
+  var dbl = max === 1 ? null : this.dbl();
+  for (var i = 1; i < max; i++)
+    res[i] = res[i - 1].add(dbl);
+  return {
+    wnd: wnd,
+    points: res
+  };
+};
 
-module.exports = {
-  Curve: Curve,
-  Point: Point,
-  getCurveByName: getCurveByName
-}
+BasePoint.prototype._getBeta = function _getBeta() {
+  return null;
+};
+
+BasePoint.prototype.dblp = function dblp(k) {
+  var r = this;
+  for (var i = 0; i < k; i++)
+    r = r.dbl();
+  return r;
+};
 
-},{"./curve":47,"./names":50,"./point":51}],50:[function(require,module,exports){
-var BigInteger = require('bigi')
+},{"../../elliptic":39,"bn.js":33}],41:[function(require,module,exports){
+'use strict';
 
-var curves = require('./curves')
-var Curve = require('./curve')
+var curve = require('../curve');
+var elliptic = require('../../elliptic');
+var BN = require('bn.js');
+var inherits = require('inherits');
+var Base = curve.base;
 
-function getCurveByName(name) {
-  var curve = curves[name]
-  if (!curve) return null
+var assert = elliptic.utils.assert;
 
-  var p = new BigInteger(curve.p, 16)
-  var a = new BigInteger(curve.a, 16)
-  var b = new BigInteger(curve.b, 16)
-  var n = new BigInteger(curve.n, 16)
-  var h = new BigInteger(curve.h, 16)
-  var Gx = new BigInteger(curve.Gx, 16)
-  var Gy = new BigInteger(curve.Gy, 16)
+function EdwardsCurve(conf) {
+  // NOTE: Important as we are creating point in Base.call()
+  this.twisted = (conf.a | 0) !== 1;
+  this.mOneA = this.twisted && (conf.a | 0) === -1;
+  this.extended = this.mOneA;
 
-  return new Curve(p, a, b, Gx, Gy, n, h)
+  Base.call(this, 'edwards', conf);
+
+  this.a = new BN(conf.a, 16).umod(this.red.m);
+  this.a = this.a.toRed(this.red);
+  this.c = new BN(conf.c, 16).toRed(this.red);
+  this.c2 = this.c.redSqr();
+  this.d = new BN(conf.d, 16).toRed(this.red);
+  this.dd = this.d.redAdd(this.d);
+
+  assert(!this.twisted || this.c.fromRed().cmpn(1) === 0);
+  this.oneC = (conf.c | 0) === 1;
 }
+inherits(EdwardsCurve, Base);
+module.exports = EdwardsCurve;
 
-module.exports = getCurveByName
+EdwardsCurve.prototype._mulA = function _mulA(num) {
+  if (this.mOneA)
+    return num.redNeg();
+  else
+    return this.a.redMul(num);
+};
 
-},{"./curve":47,"./curves":48,"bigi":3}],51:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var BigInteger = require('bigi')
+EdwardsCurve.prototype._mulC = function _mulC(num) {
+  if (this.oneC)
+    return num;
+  else
+    return this.c.redMul(num);
+};
 
-var THREE = BigInteger.valueOf(3)
+// Just for compatibility with Short curve
+EdwardsCurve.prototype.jpoint = function jpoint(x, y, z, t) {
+  return this.point(x, y, z, t);
+};
 
-function Point(curve, x, y, z) {
-  assert.notStrictEqual(z, undefined, 'Missing Z coordinate')
+EdwardsCurve.prototype.pointFromX = function pointFromX(x, odd) {
+  x = new BN(x, 16);
+  if (!x.red)
+    x = x.toRed(this.red);
 
-  this.curve = curve
-  this.x = x
-  this.y = y
-  this.z = z
-  this._zInv = null
+  var x2 = x.redSqr();
+  var rhs = this.c2.redSub(this.a.redMul(x2));
+  var lhs = this.one.redSub(this.c2.redMul(this.d).redMul(x2));
 
-  this.compressed = true
-}
+  var y2 = rhs.redMul(lhs.redInvm());
+  var y = y2.redSqrt();
+  if (y.redSqr().redSub(y2).cmp(this.zero) !== 0)
+    throw new Error('invalid point');
 
-Object.defineProperty(Point.prototype, 'zInv', {
-  get: function() {
-    if (this._zInv === null) {
-      this._zInv = this.z.modInverse(this.curve.p)
-    }
+  var isOdd = y.fromRed().isOdd();
+  if (odd && !isOdd || !odd && isOdd)
+    y = y.redNeg();
 
-    return this._zInv
-  }
-})
+  return this.point(x, y);
+};
 
-Object.defineProperty(Point.prototype, 'affineX', {
-  get: function() {
-    return this.x.multiply(this.zInv).mod(this.curve.p)
-  }
-})
+EdwardsCurve.prototype.pointFromY = function pointFromY(y, odd) {
+  y = new BN(y, 16);
+  if (!y.red)
+    y = y.toRed(this.red);
 
-Object.defineProperty(Point.prototype, 'affineY', {
-  get: function() {
-    return this.y.multiply(this.zInv).mod(this.curve.p)
+  // x^2 = (y^2 - 1) / (d y^2 + 1)
+  var y2 = y.redSqr();
+  var lhs = y2.redSub(this.one);
+  var rhs = y2.redMul(this.d).redAdd(this.one);
+  var x2 = lhs.redMul(rhs.redInvm());
+
+  if (x2.cmp(this.zero) === 0) {
+    if (odd)
+      throw new Error('invalid point');
+    else
+      return this.point(this.zero, y);
   }
-})
 
-Point.fromAffine = function(curve, x, y) {
-  return new Point(curve, x, y, BigInteger.ONE)
-}
+  var x = x2.redSqrt();
+  if (x.redSqr().redSub(x2).cmp(this.zero) !== 0)
+    throw new Error('invalid point');
 
-Point.prototype.equals = function(other) {
-  if (other === this) return true
-  if (this.curve.isInfinity(this)) return this.curve.isInfinity(other)
-  if (this.curve.isInfinity(other)) return this.curve.isInfinity(this)
+  if (x.isOdd() !== odd)
+    x = x.redNeg();
 
-  // u = Y2 * Z1 - Y1 * Z2
-  var u = other.y.multiply(this.z).subtract(this.y.multiply(other.z)).mod(this.curve.p)
+  return this.point(x, y);
+};
 
-  if (u.signum() !== 0) return false
+EdwardsCurve.prototype.validate = function validate(point) {
+  if (point.isInfinity())
+    return true;
 
-  // v = X2 * Z1 - X1 * Z2
-  var v = other.x.multiply(this.z).subtract(this.x.multiply(other.z)).mod(this.curve.p)
+  // Curve: A * X^2 + Y^2 = C^2 * (1 + D * X^2 * Y^2)
+  point.normalize();
 
-  return v.signum() === 0
-}
+  var x2 = point.x.redSqr();
+  var y2 = point.y.redSqr();
+  var lhs = x2.redMul(this.a).redAdd(y2);
+  var rhs = this.c2.redMul(this.one.redAdd(this.d.redMul(x2).redMul(y2)));
 
-Point.prototype.negate = function() {
-  var y = this.curve.p.subtract(this.y)
+  return lhs.cmp(rhs) === 0;
+};
 
-  return new Point(this.curve, this.x, y, this.z)
-}
+function Point(curve, x, y, z, t) {
+  Base.BasePoint.call(this, curve, 'projective');
+  if (x === null && y === null && z === null) {
+    this.x = this.curve.zero;
+    this.y = this.curve.one;
+    this.z = this.curve.one;
+    this.t = this.curve.zero;
+    this.zOne = true;
+  } else {
+    this.x = new BN(x, 16);
+    this.y = new BN(y, 16);
+    this.z = z ? new BN(z, 16) : this.curve.one;
+    this.t = t && new BN(t, 16);
+    if (!this.x.red)
+      this.x = this.x.toRed(this.curve.red);
+    if (!this.y.red)
+      this.y = this.y.toRed(this.curve.red);
+    if (!this.z.red)
+      this.z = this.z.toRed(this.curve.red);
+    if (this.t && !this.t.red)
+      this.t = this.t.toRed(this.curve.red);
+    this.zOne = this.z === this.curve.one;
+
+    // Use extended coordinates
+    if (this.curve.extended && !this.t) {
+      this.t = this.x.redMul(this.y);
+      if (!this.zOne)
+        this.t = this.t.redMul(this.z.redInvm());
+    }
+  }
+}
+inherits(Point, Base.BasePoint);
+
+EdwardsCurve.prototype.pointFromJSON = function pointFromJSON(obj) {
+  return Point.fromJSON(this, obj);
+};
 
-Point.prototype.add = function(b) {
-  if (this.curve.isInfinity(this)) return b
-  if (this.curve.isInfinity(b)) return this
+EdwardsCurve.prototype.point = function point(x, y, z, t) {
+  return new Point(this, x, y, z, t);
+};
 
-  var x1 = this.x
-  var y1 = this.y
-  var x2 = b.x
-  var y2 = b.y
+Point.fromJSON = function fromJSON(curve, obj) {
+  return new Point(curve, obj[0], obj[1], obj[2]);
+};
 
-  // u = Y2 * Z1 - Y1 * Z2
-  var u = y2.multiply(this.z).subtract(y1.multiply(b.z)).mod(this.curve.p)
-  // v = X2 * Z1 - X1 * Z2
-  var v = x2.multiply(this.z).subtract(x1.multiply(b.z)).mod(this.curve.p)
+Point.prototype.inspect = function inspect() {
+  if (this.isInfinity())
+    return '<EC Point Infinity>';
+  return '<EC Point x: ' + this.x.fromRed().toString(16, 2) +
+      ' y: ' + this.y.fromRed().toString(16, 2) +
+      ' z: ' + this.z.fromRed().toString(16, 2) + '>';
+};
 
-  if (v.signum() === 0) {
-    if (u.signum() === 0) {
-      return this.twice() // this == b, so double
+Point.prototype.isInfinity = function isInfinity() {
+  // XXX This code assumes that zero is always zero in red
+  return this.x.cmpn(0) === 0 &&
+         this.y.cmp(this.z) === 0;
+};
+
+Point.prototype._extDbl = function _extDbl() {
+  // hyperelliptic.org/EFD/g1p/auto-twisted-extended-1.html
+  //     #doubling-dbl-2008-hwcd
+  // 4M + 4S
+
+  // A = X1^2
+  var a = this.x.redSqr();
+  // B = Y1^2
+  var b = this.y.redSqr();
+  // C = 2 * Z1^2
+  var c = this.z.redSqr();
+  c = c.redIAdd(c);
+  // D = a * A
+  var d = this.curve._mulA(a);
+  // E = (X1 + Y1)^2 - A - B
+  var e = this.x.redAdd(this.y).redSqr().redISub(a).redISub(b);
+  // G = D + B
+  var g = d.redAdd(b);
+  // F = G - C
+  var f = g.redSub(c);
+  // H = D - B
+  var h = d.redSub(b);
+  // X3 = E * F
+  var nx = e.redMul(f);
+  // Y3 = G * H
+  var ny = g.redMul(h);
+  // T3 = E * H
+  var nt = e.redMul(h);
+  // Z3 = F * G
+  var nz = f.redMul(g);
+  return this.curve.point(nx, ny, nz, nt);
+};
+
+Point.prototype._projDbl = function _projDbl() {
+  // hyperelliptic.org/EFD/g1p/auto-twisted-projective.html
+  //     #doubling-dbl-2008-bbjlp
+  //     #doubling-dbl-2007-bl
+  // and others
+  // Generally 3M + 4S or 2M + 4S
+
+  // B = (X1 + Y1)^2
+  var b = this.x.redAdd(this.y).redSqr();
+  // C = X1^2
+  var c = this.x.redSqr();
+  // D = Y1^2
+  var d = this.y.redSqr();
+
+  var nx;
+  var ny;
+  var nz;
+  if (this.curve.twisted) {
+    // E = a * C
+    var e = this.curve._mulA(c);
+    // F = E + D
+    var f = e.redAdd(d);
+    if (this.zOne) {
+      // X3 = (B - C - D) * (F - 2)
+      nx = b.redSub(c).redSub(d).redMul(f.redSub(this.curve.two));
+      // Y3 = F * (E - D)
+      ny = f.redMul(e.redSub(d));
+      // Z3 = F^2 - 2 * F
+      nz = f.redSqr().redSub(f).redSub(f);
+    } else {
+      // H = Z1^2
+      var h = this.z.redSqr();
+      // J = F - 2 * H
+      var j = f.redSub(h).redISub(h);
+      // X3 = (B-C-D)*J
+      nx = b.redSub(c).redISub(d).redMul(j);
+      // Y3 = F * (E - D)
+      ny = f.redMul(e.redSub(d));
+      // Z3 = F * J
+      nz = f.redMul(j);
     }
+  } else {
+    // E = C + D
+    var e = c.redAdd(d);
+    // H = (c * Z1)^2
+    var h = this.curve._mulC(this.c.redMul(this.z)).redSqr();
+    // J = E - 2 * H
+    var j = e.redSub(h).redSub(h);
+    // X3 = c * (B - E) * J
+    nx = this.curve._mulC(b.redISub(e)).redMul(j);
+    // Y3 = c * E * (C - D)
+    ny = this.curve._mulC(e).redMul(c.redISub(d));
+    // Z3 = E * J
+    nz = e.redMul(j);
+  }
+  return this.curve.point(nx, ny, nz);
+};
 
-    return this.curve.infinity // this = -b, so infinity
-  }
+Point.prototype.dbl = function dbl() {
+  if (this.isInfinity())
+    return this;
 
-  var v2 = v.square()
-  var v3 = v2.multiply(v)
-  var x1v2 = x1.multiply(v2)
-  var zu2 = u.square().multiply(this.z)
+  // Double in extended coordinates
+  if (this.curve.extended)
+    return this._extDbl();
+  else
+    return this._projDbl();
+};
 
-  // x3 = v * (z2 * (z1 * u^2 - 2 * x1 * v^2) - v^3)
-  var x3 = zu2.subtract(x1v2.shiftLeft(1)).multiply(b.z).subtract(v3).multiply(v).mod(this.curve.p)
-  // y3 = z2 * (3 * x1 * u * v^2 - y1 * v^3 - z1 * u^3) + u * v^3
-  var y3 = x1v2.multiply(THREE).multiply(u).subtract(y1.multiply(v3)).subtract(zu2.multiply(u)).multiply(b.z).add(u.multiply(v3)).mod(this.curve.p)
-  // z3 = v^3 * z1 * z2
-  var z3 = v3.multiply(this.z).multiply(b.z).mod(this.curve.p)
+Point.prototype._extAdd = function _extAdd(p) {
+  // hyperelliptic.org/EFD/g1p/auto-twisted-extended-1.html
+  //     #addition-add-2008-hwcd-3
+  // 8M
+
+  // A = (Y1 - X1) * (Y2 - X2)
+  var a = this.y.redSub(this.x).redMul(p.y.redSub(p.x));
+  // B = (Y1 + X1) * (Y2 + X2)
+  var b = this.y.redAdd(this.x).redMul(p.y.redAdd(p.x));
+  // C = T1 * k * T2
+  var c = this.t.redMul(this.curve.dd).redMul(p.t);
+  // D = Z1 * 2 * Z2
+  var d = this.z.redMul(p.z.redAdd(p.z));
+  // E = B - A
+  var e = b.redSub(a);
+  // F = D - C
+  var f = d.redSub(c);
+  // G = D + C
+  var g = d.redAdd(c);
+  // H = B + A
+  var h = b.redAdd(a);
+  // X3 = E * F
+  var nx = e.redMul(f);
+  // Y3 = G * H
+  var ny = g.redMul(h);
+  // T3 = E * H
+  var nt = e.redMul(h);
+  // Z3 = F * G
+  var nz = f.redMul(g);
+  return this.curve.point(nx, ny, nz, nt);
+};
 
-  return new Point(this.curve, x3, y3, z3)
-}
+Point.prototype._projAdd = function _projAdd(p) {
+  // hyperelliptic.org/EFD/g1p/auto-twisted-projective.html
+  //     #addition-add-2008-bbjlp
+  //     #addition-add-2007-bl
+  // 10M + 1S
+
+  // A = Z1 * Z2
+  var a = this.z.redMul(p.z);
+  // B = A^2
+  var b = a.redSqr();
+  // C = X1 * X2
+  var c = this.x.redMul(p.x);
+  // D = Y1 * Y2
+  var d = this.y.redMul(p.y);
+  // E = d * C * D
+  var e = this.curve.d.redMul(c).redMul(d);
+  // F = B - E
+  var f = b.redSub(e);
+  // G = B + E
+  var g = b.redAdd(e);
+  // X3 = A * F * ((X1 + Y1) * (X2 + Y2) - C - D)
+  var tmp = this.x.redAdd(this.y).redMul(p.x.redAdd(p.y)).redISub(c).redISub(d);
+  var nx = a.redMul(f).redMul(tmp);
+  var ny;
+  var nz;
+  if (this.curve.twisted) {
+    // Y3 = A * G * (D - a * C)
+    ny = a.redMul(g).redMul(d.redSub(this.curve._mulA(c)));
+    // Z3 = F * G
+    nz = f.redMul(g);
+  } else {
+    // Y3 = A * G * (D - C)
+    ny = a.redMul(g).redMul(d.redSub(c));
+    // Z3 = c * F * G
+    nz = this.curve._mulC(f).redMul(g);
+  }
+  return this.curve.point(nx, ny, nz);
+};
 
-Point.prototype.twice = function() {
-  if (this.curve.isInfinity(this)) return this
-  if (this.y.signum() === 0) return this.curve.infinity
+Point.prototype.add = function add(p) {
+  if (this.isInfinity())
+    return p;
+  if (p.isInfinity())
+    return this;
 
-  var x1 = this.x
-  var y1 = this.y
+  if (this.curve.extended)
+    return this._extAdd(p);
+  else
+    return this._projAdd(p);
+};
 
-  var y1z1 = y1.multiply(this.z)
-  var y1sqz1 = y1z1.multiply(y1).mod(this.curve.p)
-  var a = this.curve.a
+Point.prototype.mul = function mul(k) {
+  if (this._hasDoubles(k))
+    return this.curve._fixedNafMul(this, k);
+  else
+    return this.curve._wnafMul(this, k);
+};
 
-  // w = 3 * x1^2 + a * z1^2
-  var w = x1.square().multiply(THREE)
+Point.prototype.mulAdd = function mulAdd(k1, p, k2) {
+  return this.curve._wnafMulAdd(1, [ this, p ], [ k1, k2 ], 2, false);
+};
 
-  if (a.signum() !== 0) {
-    w = w.add(this.z.square().multiply(a))
-  }
+Point.prototype.jmulAdd = function jmulAdd(k1, p, k2) {
+  return this.curve._wnafMulAdd(1, [ this, p ], [ k1, k2 ], 2, true);
+};
 
-  w = w.mod(this.curve.p)
-  // x3 = 2 * y1 * z1 * (w^2 - 8 * x1 * y1^2 * z1)
-  var x3 = w.square().subtract(x1.shiftLeft(3).multiply(y1sqz1)).shiftLeft(1).multiply(y1z1).mod(this.curve.p)
-  // y3 = 4 * y1^2 * z1 * (3 * w * x1 - 2 * y1^2 * z1) - w^3
-  var y3 = w.multiply(THREE).multiply(x1).subtract(y1sqz1.shiftLeft(1)).shiftLeft(2).multiply(y1sqz1).subtract(w.pow(3)).mod(this.curve.p)
-  // z3 = 8 * (y1 * z1)^3
-  var z3 = y1z1.pow(3).shiftLeft(3).mod(this.curve.p)
+Point.prototype.normalize = function normalize() {
+  if (this.zOne)
+    return this;
 
-  return new Point(this.curve, x3, y3, z3)
-}
+  // Normalize coordinates
+  var zi = this.z.redInvm();
+  this.x = this.x.redMul(zi);
+  this.y = this.y.redMul(zi);
+  if (this.t)
+    this.t = this.t.redMul(zi);
+  this.z = this.curve.one;
+  this.zOne = true;
+  return this;
+};
 
-// Simple NAF (Non-Adjacent Form) multiplication algorithm
-// TODO: modularize the multiplication algorithm
-Point.prototype.multiply = function(k) {
-  if (this.curve.isInfinity(this)) return this
-  if (k.signum() === 0) return this.curve.infinity
+Point.prototype.neg = function neg() {
+  return this.curve.point(this.x.redNeg(),
+                          this.y,
+                          this.z,
+                          this.t && this.t.redNeg());
+};
 
-  var e = k
-  var h = e.multiply(THREE)
+Point.prototype.getX = function getX() {
+  this.normalize();
+  return this.x.fromRed();
+};
 
-  var neg = this.negate()
-  var R = this
+Point.prototype.getY = function getY() {
+  this.normalize();
+  return this.y.fromRed();
+};
 
-  for (var i = h.bitLength() - 2; i > 0; --i) {
-    R = R.twice()
+Point.prototype.eq = function eq(other) {
+  return this === other ||
+         this.getX().cmp(other.getX()) === 0 &&
+         this.getY().cmp(other.getY()) === 0;
+};
 
-    var hBit = h.testBit(i)
-    var eBit = e.testBit(i)
+Point.prototype.eqXToP = function eqXToP(x) {
+  var rx = x.toRed(this.curve.red).redMul(this.z);
+  if (this.x.cmp(rx) === 0)
+    return true;
 
-    if (hBit != eBit) {
-      R = R.add(hBit ? this : neg)
-    }
+  var xc = x.clone();
+  var t = this.curve.redN.redMul(this.z);
+  for (;;) {
+    xc.iadd(this.curve.n);
+    if (xc.cmp(this.curve.p) >= 0)
+      return false;
+
+    rx.redIAdd(t);
+    if (this.x.cmp(rx) === 0)
+      return true;
   }
+  return false;
+};
 
-  return R
-}
+// Compatibility with BaseCurve
+Point.prototype.toP = Point.prototype.normalize;
+Point.prototype.mixedAdd = Point.prototype.add;
 
-// Compute this*j + x*k (simultaneous multiplication)
-Point.prototype.multiplyTwo = function(j, x, k) {
-  var i
+},{"../../elliptic":39,"../curve":42,"bn.js":33,"inherits":63}],42:[function(require,module,exports){
+'use strict';
 
-  if (j.bitLength() > k.bitLength())
-    i = j.bitLength() - 1
-  else
-    i = k.bitLength() - 1
+var curve = exports;
 
-  var R = this.curve.infinity
-  var both = this.add(x)
+curve.base = require('./base');
+curve.short = require('./short');
+curve.mont = require('./mont');
+curve.edwards = require('./edwards');
 
-  while (i >= 0) {
-    R = R.twice()
+},{"./base":40,"./edwards":41,"./mont":43,"./short":44}],43:[function(require,module,exports){
+'use strict';
 
-    var jBit = j.testBit(i)
-    var kBit = k.testBit(i)
+var curve = require('../curve');
+var BN = require('bn.js');
+var inherits = require('inherits');
+var Base = curve.base;
 
-    if (jBit) {
-      if (kBit) {
-        R = R.add(both)
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
 
-      } else {
-        R = R.add(this)
-      }
+function MontCurve(conf) {
+  Base.call(this, 'mont', conf);
 
-    } else {
-      if (kBit) {
-        R = R.add(x)
-      }
-    }
-    --i
-  }
+  this.a = new BN(conf.a, 16).toRed(this.red);
+  this.b = new BN(conf.b, 16).toRed(this.red);
+  this.i4 = new BN(4).toRed(this.red).redInvm();
+  this.two = new BN(2).toRed(this.red);
+  this.a24 = this.i4.redMul(this.a.redAdd(this.two));
+}
+inherits(MontCurve, Base);
+module.exports = MontCurve;
 
-  return R
+MontCurve.prototype.validate = function validate(point) {
+  var x = point.normalize().x;
+  var x2 = x.redSqr();
+  var rhs = x2.redMul(x).redAdd(x2.redMul(this.a)).redAdd(x);
+  var y = rhs.redSqrt();
+
+  return y.redSqr().cmp(rhs) === 0;
+};
+
+function Point(curve, x, z) {
+  Base.BasePoint.call(this, curve, 'projective');
+  if (x === null && z === null) {
+    this.x = this.curve.one;
+    this.z = this.curve.zero;
+  } else {
+    this.x = new BN(x, 16);
+    this.z = new BN(z, 16);
+    if (!this.x.red)
+      this.x = this.x.toRed(this.curve.red);
+    if (!this.z.red)
+      this.z = this.z.toRed(this.curve.red);
+  }
 }
+inherits(Point, Base.BasePoint);
 
-Point.prototype.getEncoded = function(compressed) {
-  if (compressed == undefined) compressed = this.compressed
-  if (this.curve.isInfinity(this)) return new Buffer('00', 'hex') // Infinity point encoded is simply '00'
+MontCurve.prototype.decodePoint = function decodePoint(bytes, enc) {
+  return this.point(utils.toArray(bytes, enc), 1);
+};
 
-  var x = this.affineX
-  var y = this.affineY
+MontCurve.prototype.point = function point(x, z) {
+  return new Point(this, x, z);
+};
 
-  var buffer
+MontCurve.prototype.pointFromJSON = function pointFromJSON(obj) {
+  return Point.fromJSON(this, obj);
+};
 
-  // Determine size of q in bytes
-  var byteLength = Math.floor((this.curve.p.bitLength() + 7) / 8)
+Point.prototype.precompute = function precompute() {
+  // No-op
+};
 
-  // 0x02/0x03 | X
-  if (compressed) {
-    buffer = new Buffer(1 + byteLength)
-    buffer.writeUInt8(y.isEven() ? 0x02 : 0x03, 0)
+Point.prototype._encode = function _encode() {
+  return this.getX().toArray('be', this.curve.p.byteLength());
+};
 
-  // 0x04 | X | Y
-  } else {
-    buffer = new Buffer(1 + byteLength + byteLength)
-    buffer.writeUInt8(0x04, 0)
+Point.fromJSON = function fromJSON(curve, obj) {
+  return new Point(curve, obj[0], obj[1] || curve.one);
+};
+
+Point.prototype.inspect = function inspect() {
+  if (this.isInfinity())
+    return '<EC Point Infinity>';
+  return '<EC Point x: ' + this.x.fromRed().toString(16, 2) +
+      ' z: ' + this.z.fromRed().toString(16, 2) + '>';
+};
+
+Point.prototype.isInfinity = function isInfinity() {
+  // XXX This code assumes that zero is always zero in red
+  return this.z.cmpn(0) === 0;
+};
+
+Point.prototype.dbl = function dbl() {
+  // http://hyperelliptic.org/EFD/g1p/auto-montgom-xz.html#doubling-dbl-1987-m-3
+  // 2M + 2S + 4A
+
+  // A = X1 + Z1
+  var a = this.x.redAdd(this.z);
+  // AA = A^2
+  var aa = a.redSqr();
+  // B = X1 - Z1
+  var b = this.x.redSub(this.z);
+  // BB = B^2
+  var bb = b.redSqr();
+  // C = AA - BB
+  var c = aa.redSub(bb);
+  // X3 = AA * BB
+  var nx = aa.redMul(bb);
+  // Z3 = C * (BB + A24 * C)
+  var nz = c.redMul(bb.redAdd(this.curve.a24.redMul(c)));
+  return this.curve.point(nx, nz);
+};
+
+Point.prototype.add = function add() {
+  throw new Error('Not supported on Montgomery curve');
+};
+
+Point.prototype.diffAdd = function diffAdd(p, diff) {
+  // http://hyperelliptic.org/EFD/g1p/auto-montgom-xz.html#diffadd-dadd-1987-m-3
+  // 4M + 2S + 6A
+
+  // A = X2 + Z2
+  var a = this.x.redAdd(this.z);
+  // B = X2 - Z2
+  var b = this.x.redSub(this.z);
+  // C = X3 + Z3
+  var c = p.x.redAdd(p.z);
+  // D = X3 - Z3
+  var d = p.x.redSub(p.z);
+  // DA = D * A
+  var da = d.redMul(a);
+  // CB = C * B
+  var cb = c.redMul(b);
+  // X5 = Z1 * (DA + CB)^2
+  var nx = diff.z.redMul(da.redAdd(cb).redSqr());
+  // Z5 = X1 * (DA - CB)^2
+  var nz = diff.x.redMul(da.redISub(cb).redSqr());
+  return this.curve.point(nx, nz);
+};
 
-    y.toBuffer(byteLength).copy(buffer, 1 + byteLength)
+Point.prototype.mul = function mul(k) {
+  var t = k.clone();
+  var a = this; // (N / 2) * Q + Q
+  var b = this.curve.point(null, null); // (N / 2) * Q
+  var c = this; // Q
+
+  for (var bits = []; t.cmpn(0) !== 0; t.iushrn(1))
+    bits.push(t.andln(1));
+
+  for (var i = bits.length - 1; i >= 0; i--) {
+    if (bits[i] === 0) {
+      // N * Q + Q = ((N / 2) * Q + Q)) + (N / 2) * Q
+      a = a.diffAdd(b, c);
+      // N * Q = 2 * ((N / 2) * Q + Q))
+      b = b.dbl();
+    } else {
+      // N * Q = ((N / 2) * Q + Q) + ((N / 2) * Q)
+      b = a.diffAdd(b, c);
+      // N * Q + Q = 2 * ((N / 2) * Q + Q)
+      a = a.dbl();
+    }
   }
+  return b;
+};
 
-  x.toBuffer(byteLength).copy(buffer, 1)
-
-  return buffer
-}
+Point.prototype.mulAdd = function mulAdd() {
+  throw new Error('Not supported on Montgomery curve');
+};
 
-Point.decodeFrom = function(curve, buffer) {
-  var type = buffer.readUInt8(0)
-  var compressed = (type !== 4)
+Point.prototype.jumlAdd = function jumlAdd() {
+  throw new Error('Not supported on Montgomery curve');
+};
 
-  var byteLength = Math.floor((curve.p.bitLength() + 7) / 8)
-  var x = BigInteger.fromBuffer(buffer.slice(1, 1 + byteLength))
+Point.prototype.eq = function eq(other) {
+  return this.getX().cmp(other.getX()) === 0;
+};
 
-  var Q
-  if (compressed) {
-    assert.equal(buffer.length, byteLength + 1, 'Invalid sequence length')
-    assert(type === 0x02 || type === 0x03, 'Invalid sequence tag')
+Point.prototype.normalize = function normalize() {
+  this.x = this.x.redMul(this.z.redInvm());
+  this.z = this.curve.one;
+  return this;
+};
 
-    var isOdd = (type === 0x03)
-    Q = curve.pointFromX(isOdd, x)
+Point.prototype.getX = function getX() {
+  // Normalize coordinates
+  this.normalize();
 
-  } else {
-    assert.equal(buffer.length, 1 + byteLength + byteLength, 'Invalid sequence length')
+  return this.x.fromRed();
+};
 
-    var y = BigInteger.fromBuffer(buffer.slice(1 + byteLength))
-    Q = Point.fromAffine(curve, x, y)
-  }
+},{"../../elliptic":39,"../curve":42,"bn.js":33,"inherits":63}],44:[function(require,module,exports){
+'use strict';
 
-  Q.compressed = compressed
-  return Q
-}
+var curve = require('../curve');
+var elliptic = require('../../elliptic');
+var BN = require('bn.js');
+var inherits = require('inherits');
+var Base = curve.base;
 
-Point.prototype.toString = function () {
-  if (this.curve.isInfinity(this)) return '(INFINITY)'
+var assert = elliptic.utils.assert;
 
-  return '(' + this.affineX.toString() + ',' + this.affineY.toString() + ')'
-}
+function ShortCurve(conf) {
+  Base.call(this, 'short', conf);
 
-module.exports = Point
+  this.a = new BN(conf.a, 16).toRed(this.red);
+  this.b = new BN(conf.b, 16).toRed(this.red);
+  this.tinv = this.two.redInvm();
 
-}).call(this,require("buffer").Buffer)
-},{"assert":5,"bigi":3,"buffer":7}],52:[function(require,module,exports){
-(function (process,global,Buffer){
-'use strict';
+  this.zeroA = this.a.fromRed().cmpn(0) === 0;
+  this.threeA = this.a.fromRed().sub(this.p).cmpn(-3) === 0;
 
-var crypto = global.crypto || global.msCrypto
-if(crypto && crypto.getRandomValues) {
-  module.exports = randomBytes;
-} else {
-  module.exports = oldBrowser;
+  // If the curve is endomorphic, precalculate beta and lambda
+  this.endo = this._getEndomorphism(conf);
+  this._endoWnafT1 = new Array(4);
+  this._endoWnafT2 = new Array(4);
 }
-function randomBytes(size, cb) {
-  var bytes = new Buffer(size); //in browserify, this is an extended Uint8Array
-    /* This will not work in older browsers.
-     * See https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues
-     */
+inherits(ShortCurve, Base);
+module.exports = ShortCurve;
 
-  crypto.getRandomValues(bytes);
-  if (typeof cb === 'function') {
-    return process.nextTick(function () {
-      cb(null, bytes);
+ShortCurve.prototype._getEndomorphism = function _getEndomorphism(conf) {
+  // No efficient endomorphism
+  if (!this.zeroA || !this.g || !this.n || this.p.modn(3) !== 1)
+    return;
+
+  // Compute beta and lambda, that lambda * P = (beta * Px; Py)
+  var beta;
+  var lambda;
+  if (conf.beta) {
+    beta = new BN(conf.beta, 16).toRed(this.red);
+  } else {
+    var betas = this._getEndoRoots(this.p);
+    // Choose the smallest beta
+    beta = betas[0].cmp(betas[1]) < 0 ? betas[0] : betas[1];
+    beta = beta.toRed(this.red);
+  }
+  if (conf.lambda) {
+    lambda = new BN(conf.lambda, 16);
+  } else {
+    // Choose the lambda that is matching selected beta
+    var lambdas = this._getEndoRoots(this.n);
+    if (this.g.mul(lambdas[0]).x.cmp(this.g.x.redMul(beta)) === 0) {
+      lambda = lambdas[0];
+    } else {
+      lambda = lambdas[1];
+      assert(this.g.mul(lambda).x.cmp(this.g.x.redMul(beta)) === 0);
+    }
+  }
+
+  // Get basis vectors, used for balanced length-two representation
+  var basis;
+  if (conf.basis) {
+    basis = conf.basis.map(function(vec) {
+      return {
+        a: new BN(vec.a, 16),
+        b: new BN(vec.b, 16)
+      };
     });
+  } else {
+    basis = this._getEndoBasis(lambda);
   }
-  return bytes;
-}
-function oldBrowser() {
-  throw new Error(
-      'secure random number generation not supported by this browser\n'+
-      'use chrome, FireFox or Internet Explorer 11'
-    )
-}
 
-}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer)
-},{"_process":14,"buffer":7}],53:[function(require,module,exports){
-(function (Buffer){
-'use strict';
+  return {
+    beta: beta,
+    lambda: lambda,
+    basis: basis
+  };
+};
 
-function getFunctionName(fn) {
-  return fn.name || fn.toString().match(/function (.*?)\s*\(/)[1];
-}
+ShortCurve.prototype._getEndoRoots = function _getEndoRoots(num) {
+  // Find roots of for x^2 + x + 1 in F
+  // Root = (-1 +- Sqrt(-3)) / 2
+  //
+  var red = num === this.p ? this.red : BN.mont(num);
+  var tinv = new BN(2).toRed(red).redInvm();
+  var ntinv = tinv.redNeg();
 
-function getTypeTypeName(type) {
-  if (nativeTypes.Function(type)) {
-    type = type.toJSON ? type.toJSON() : getFunctionName(type);
+  var s = new BN(3).toRed(red).redNeg().redSqrt().redMul(tinv);
+
+  var l1 = ntinv.redAdd(s).fromRed();
+  var l2 = ntinv.redSub(s).fromRed();
+  return [ l1, l2 ];
+};
+
+ShortCurve.prototype._getEndoBasis = function _getEndoBasis(lambda) {
+  // aprxSqrt >= sqrt(this.n)
+  var aprxSqrt = this.n.ushrn(Math.floor(this.n.bitLength() / 2));
+
+  // 3.74
+  // Run EGCD, until r(L + 1) < aprxSqrt
+  var u = lambda;
+  var v = this.n.clone();
+  var x1 = new BN(1);
+  var y1 = new BN(0);
+  var x2 = new BN(0);
+  var y2 = new BN(1);
+
+  // NOTE: all vectors are roots of: a + b * lambda = 0 (mod n)
+  var a0;
+  var b0;
+  // First vector
+  var a1;
+  var b1;
+  // Second vector
+  var a2;
+  var b2;
+
+  var prevR;
+  var i = 0;
+  var r;
+  var x;
+  while (u.cmpn(0) !== 0) {
+    var q = v.div(u);
+    r = v.sub(q.mul(u));
+    x = x2.sub(q.mul(x1));
+    var y = y2.sub(q.mul(y1));
+
+    if (!a1 && r.cmp(aprxSqrt) < 0) {
+      a0 = prevR.neg();
+      b0 = x1;
+      a1 = r.neg();
+      b1 = x;
+    } else if (a1 && ++i === 2) {
+      break;
+    }
+    prevR = r;
+
+    v = u;
+    u = r;
+    x2 = x1;
+    x1 = x;
+    y2 = y1;
+    y1 = y;
   }
-  if (nativeTypes.Object(type)) return JSON.stringify(type);
+  a2 = r.neg();
+  b2 = x;
 
-  return type;
-}
+  var len1 = a1.sqr().add(b1.sqr());
+  var len2 = a2.sqr().add(b2.sqr());
+  if (len2.cmp(len1) >= 0) {
+    a2 = a0;
+    b2 = b0;
+  }
 
-function getValueTypeName(value) {
-  if (nativeTypes.Null(value)) return '';
+  // Normalize signs
+  if (a1.negative) {
+    a1 = a1.neg();
+    b1 = b1.neg();
+  }
+  if (a2.negative) {
+    a2 = a2.neg();
+    b2 = b2.neg();
+  }
 
-  return getFunctionName(value.constructor);
-}
+  return [
+    { a: a1, b: b1 },
+    { a: a2, b: b2 }
+  ];
+};
 
-function tfErrorString(type, value) {
-  var typeTypeName = getTypeTypeName(type);
-  var valueTypeName = getValueTypeName(value);
+ShortCurve.prototype._endoSplit = function _endoSplit(k) {
+  var basis = this.endo.basis;
+  var v1 = basis[0];
+  var v2 = basis[1];
 
-  return 'Expected ' + typeTypeName + ', got ' + (valueTypeName && valueTypeName + ' ') + JSON.stringify(value);
-}
+  var c1 = v2.b.mul(k).divRound(this.n);
+  var c2 = v1.b.neg().mul(k).divRound(this.n);
 
-function tfPropertyErrorString(type, name, value) {
-  return tfErrorString('property \"' + name + '\" of type ' + getTypeTypeName(type), value);
-}
+  var p1 = c1.mul(v1.a);
+  var p2 = c2.mul(v2.a);
+  var q1 = c1.mul(v1.b);
+  var q2 = c2.mul(v2.b);
 
-var nativeTypes = {
-  Array: (function (_Array) {
-    function Array(_x) {
-      return _Array.apply(this, arguments);
-    }
+  // Calculate answer
+  var k1 = k.sub(p1).sub(p2);
+  var k2 = q1.add(q2).neg();
+  return { k1: k1, k2: k2 };
+};
 
-    Array.toString = function () {
-      return _Array.toString();
-    };
+ShortCurve.prototype.pointFromX = function pointFromX(x, odd) {
+  x = new BN(x, 16);
+  if (!x.red)
+    x = x.toRed(this.red);
 
-    return Array;
-  })(function (value) {
-    return value !== null && value !== undefined && value.constructor === Array;
-  }),
-  Boolean: function Boolean(value) {
-    return typeof value === 'boolean';
-  },
-  Buffer: (function (_Buffer) {
-    function Buffer(_x2) {
-      return _Buffer.apply(this, arguments);
-    }
+  var y2 = x.redSqr().redMul(x).redIAdd(x.redMul(this.a)).redIAdd(this.b);
+  var y = y2.redSqrt();
+  if (y.redSqr().redSub(y2).cmp(this.zero) !== 0)
+    throw new Error('invalid point');
 
-    Buffer.toString = function () {
-      return _Buffer.toString();
-    };
+  // XXX Is there any way to tell if the number is odd without converting it
+  // to non-red form?
+  var isOdd = y.fromRed().isOdd();
+  if (odd && !isOdd || !odd && isOdd)
+    y = y.redNeg();
 
-    return Buffer;
-  })(function (value) {
-    return Buffer.isBuffer(value);
-  }),
-  Function: function Function(value) {
-    return typeof value === 'function';
-  },
-  Null: function Null(value) {
-    return value === undefined || value === null;
-  },
-  Number: function Number(value) {
-    return typeof value === 'number';
-  },
-  Object: function Object(value) {
-    return typeof value === 'object';
-  },
-  String: function String(value) {
-    return typeof value === 'string';
-  },
-  '': function _() {
-    return true;
-  }
+  return this.point(x, y);
 };
 
-function tJSON(type) {
-  return type && type.toJSON ? type.toJSON() : type;
-}
+ShortCurve.prototype.validate = function validate(point) {
+  if (point.inf)
+    return true;
 
-function sJSON(type) {
-  var json = tJSON(type);
-  return nativeTypes.Object(json) ? JSON.stringify(json) : json;
-}
+  var x = point.x;
+  var y = point.y;
 
-var otherTypes = {
-  arrayOf: function arrayOf(type) {
-    function arrayOf(value, strict) {
-      try {
-        return nativeTypes.Array(value) && value.every(function (x) {
-          return typeforce(type, x, strict);
-        });
-      } catch (e) {
-        return false;
-      }
-    }
-    arrayOf.toJSON = function () {
-      return [tJSON(type)];
-    };
+  var ax = this.a.redMul(x);
+  var rhs = x.redSqr().redMul(x).redIAdd(ax).redIAdd(this.b);
+  return y.redSqr().redISub(rhs).cmpn(0) === 0;
+};
 
-    return arrayOf;
-  },
+ShortCurve.prototype._endoWnafMulAdd =
+    function _endoWnafMulAdd(points, coeffs, jacobianResult) {
+  var npoints = this._endoWnafT1;
+  var ncoeffs = this._endoWnafT2;
+  for (var i = 0; i < points.length; i++) {
+    var split = this._endoSplit(coeffs[i]);
+    var p = points[i];
+    var beta = p._getBeta();
 
-  maybe: function maybe(type) {
-    function maybe(value, strict) {
-      return nativeTypes.Null(value) || typeforce(type, value, strict);
+    if (split.k1.negative) {
+      split.k1.ineg();
+      p = p.neg(true);
+    }
+    if (split.k2.negative) {
+      split.k2.ineg();
+      beta = beta.neg(true);
     }
-    maybe.toJSON = function () {
-      return '?' + sJSON(type);
-    };
 
-    return maybe;
-  },
+    npoints[i * 2] = p;
+    npoints[i * 2 + 1] = beta;
+    ncoeffs[i * 2] = split.k1;
+    ncoeffs[i * 2 + 1] = split.k2;
+  }
+  var res = this._wnafMulAdd(1, npoints, ncoeffs, i * 2, jacobianResult);
 
-  object: function object(type) {
-    function object(value, strict) {
-      typeforce(nativeTypes.Object, value, strict);
+  // Clean-up references to points and coefficients
+  for (var j = 0; j < i * 2; j++) {
+    npoints[j] = null;
+    ncoeffs[j] = null;
+  }
+  return res;
+};
 
-      var propertyName, propertyType, propertyValue;
+function Point(curve, x, y, isRed) {
+  Base.BasePoint.call(this, curve, 'affine');
+  if (x === null && y === null) {
+    this.x = null;
+    this.y = null;
+    this.inf = true;
+  } else {
+    this.x = new BN(x, 16);
+    this.y = new BN(y, 16);
+    // Force redgomery representation when loading from JSON
+    if (isRed) {
+      this.x.forceRed(this.curve.red);
+      this.y.forceRed(this.curve.red);
+    }
+    if (!this.x.red)
+      this.x = this.x.toRed(this.curve.red);
+    if (!this.y.red)
+      this.y = this.y.toRed(this.curve.red);
+    this.inf = false;
+  }
+}
+inherits(Point, Base.BasePoint);
 
-      try {
-        for (propertyName in type) {
-          propertyType = type[propertyName];
-          propertyValue = value[propertyName];
+ShortCurve.prototype.point = function point(x, y, isRed) {
+  return new Point(this, x, y, isRed);
+};
 
-          typeforce(propertyType, propertyValue, strict);
-        }
-      } catch (e) {
-        throw new TypeError(tfPropertyErrorString(propertyType, propertyName, propertyValue));
-      }
+ShortCurve.prototype.pointFromJSON = function pointFromJSON(obj, red) {
+  return Point.fromJSON(this, obj, red);
+};
 
-      if (strict) {
-        for (propertyName in value) {
-          if (type[propertyName]) continue;
+Point.prototype._getBeta = function _getBeta() {
+  if (!this.curve.endo)
+    return;
 
-          throw new TypeError('Unexpected property "' + propertyName + '"');
-        }
-      }
+  var pre = this.precomputed;
+  if (pre && pre.beta)
+    return pre.beta;
 
-      return true;
-    }
-    object.toJSON = function () {
-      return type;
+  var beta = this.curve.point(this.x.redMul(this.curve.endo.beta), this.y);
+  if (pre) {
+    var curve = this.curve;
+    var endoMul = function(p) {
+      return curve.point(p.x.redMul(curve.endo.beta), p.y);
+    };
+    pre.beta = beta;
+    beta.precomputed = {
+      beta: null,
+      naf: pre.naf && {
+        wnd: pre.naf.wnd,
+        points: pre.naf.points.map(endoMul)
+      },
+      doubles: pre.doubles && {
+        step: pre.doubles.step,
+        points: pre.doubles.points.map(endoMul)
+      }
     };
+  }
+  return beta;
+};
 
-    return object;
-  },
+Point.prototype.toJSON = function toJSON() {
+  if (!this.precomputed)
+    return [ this.x, this.y ];
 
-  oneOf: function oneOf() {
-    for (var _len = arguments.length, types = Array(_len), _key = 0; _key < _len; _key++) {
-      types[_key] = arguments[_key];
+  return [ this.x, this.y, this.precomputed && {
+    doubles: this.precomputed.doubles && {
+      step: this.precomputed.doubles.step,
+      points: this.precomputed.doubles.points.slice(1)
+    },
+    naf: this.precomputed.naf && {
+      wnd: this.precomputed.naf.wnd,
+      points: this.precomputed.naf.points.slice(1)
     }
+  } ];
+};
 
-    function oneOf(value, strict) {
-      return types.some(function (type) {
-        try {
-          return typeforce(type, value, strict);
-        } catch (e) {
-          return false;
-        }
-      });
+Point.fromJSON = function fromJSON(curve, obj, red) {
+  if (typeof obj === 'string')
+    obj = JSON.parse(obj);
+  var res = curve.point(obj[0], obj[1], red);
+  if (!obj[2])
+    return res;
+
+  function obj2point(obj) {
+    return curve.point(obj[0], obj[1], red);
+  }
+
+  var pre = obj[2];
+  res.precomputed = {
+    beta: null,
+    doubles: pre.doubles && {
+      step: pre.doubles.step,
+      points: [ res ].concat(pre.doubles.points.map(obj2point))
+    },
+    naf: pre.naf && {
+      wnd: pre.naf.wnd,
+      points: [ res ].concat(pre.naf.points.map(obj2point))
     }
-    oneOf.toJSON = function () {
-      return types.map(sJSON).join('|');
-    };
+  };
+  return res;
+};
 
-    return oneOf;
-  },
+Point.prototype.inspect = function inspect() {
+  if (this.isInfinity())
+    return '<EC Point Infinity>';
+  return '<EC Point x: ' + this.x.fromRed().toString(16, 2) +
+      ' y: ' + this.y.fromRed().toString(16, 2) + '>';
+};
 
-  quacksLike: function quacksLike(type) {
-    function quacksLike(value, strict) {
-      return type === getValueTypeName(value);
-    }
-    quacksLike.toJSON = function () {
-      return type;
-    };
+Point.prototype.isInfinity = function isInfinity() {
+  return this.inf;
+};
 
-    return quacksLike;
-  },
+Point.prototype.add = function add(p) {
+  // O + P = P
+  if (this.inf)
+    return p;
 
-  tuple: function tuple() {
-    for (var _len2 = arguments.length, types = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
-      types[_key2] = arguments[_key2];
-    }
+  // P + O = P
+  if (p.inf)
+    return this;
 
-    function tuple(value, strict) {
-      return types.every(function (type, i) {
-        return typeforce(type, value[i], strict);
-      });
-    }
-    tuple.toJSON = function () {
-      return '(' + types.map(sJSON).join(', ') + ')';
-    };
+  // P + P = 2P
+  if (this.eq(p))
+    return this.dbl();
 
-    return tuple;
-  },
+  // P + (-P) = O
+  if (this.neg().eq(p))
+    return this.curve.point(null, null);
 
-  value: function value(expected) {
-    function value(actual) {
-      return actual === expected;
-    }
-    value.toJSON = function () {
-      return expected;
-    };
+  // P + Q = O
+  if (this.x.cmp(p.x) === 0)
+    return this.curve.point(null, null);
 
-    return value;
-  }
+  var c = this.y.redSub(p.y);
+  if (c.cmpn(0) !== 0)
+    c = c.redMul(this.x.redSub(p.x).redInvm());
+  var nx = c.redSqr().redISub(this.x).redISub(p.x);
+  var ny = c.redMul(this.x.redSub(nx)).redISub(this.y);
+  return this.curve.point(nx, ny);
 };
 
-function compile(type) {
-  if (nativeTypes.String(type)) {
-    if (type[0] === '?') return otherTypes.maybe(compile(type.slice(1)));
+Point.prototype.dbl = function dbl() {
+  if (this.inf)
+    return this;
 
-    return nativeTypes[type] || otherTypes.quacksLike(type);
-  } else if (type && nativeTypes.Object(type)) {
-    if (nativeTypes.Array(type)) return otherTypes.arrayOf(compile(type[0]));
+  // 2P = O
+  var ys1 = this.y.redAdd(this.y);
+  if (ys1.cmpn(0) === 0)
+    return this.curve.point(null, null);
 
-    var compiled = {};
+  var a = this.curve.a;
 
-    for (var propertyName in type) {
-      compiled[propertyName] = compile(type[propertyName]);
-    }
+  var x2 = this.x.redSqr();
+  var dyinv = ys1.redInvm();
+  var c = x2.redAdd(x2).redIAdd(x2).redIAdd(a).redMul(dyinv);
 
-    return otherTypes.object(compiled);
-  } else if (nativeTypes.Function(type)) {
-    return type;
-  }
+  var nx = c.redSqr().redISub(this.x.redAdd(this.x));
+  var ny = c.redMul(this.x.redSub(nx)).redISub(this.y);
+  return this.curve.point(nx, ny);
+};
 
-  return otherTypes.value(type);
-}
+Point.prototype.getX = function getX() {
+  return this.x.fromRed();
+};
 
-function typeforce(_x3, _x4, _x5) {
-  var _again = true;
+Point.prototype.getY = function getY() {
+  return this.y.fromRed();
+};
 
-  _function: while (_again) {
-    var type = _x3,
-        value = _x4,
-        strict = _x5;
-    _again = false;
+Point.prototype.mul = function mul(k) {
+  k = new BN(k, 16);
 
-    if (nativeTypes.Function(type)) {
-      if (type(value, strict)) return true;
+  if (this._hasDoubles(k))
+    return this.curve._fixedNafMul(this, k);
+  else if (this.curve.endo)
+    return this.curve._endoWnafMulAdd([ this ], [ k ]);
+  else
+    return this.curve._wnafMul(this, k);
+};
 
-      throw new TypeError(tfErrorString(type, value));
-    }
+Point.prototype.mulAdd = function mulAdd(k1, p2, k2) {
+  var points = [ this, p2 ];
+  var coeffs = [ k1, k2 ];
+  if (this.curve.endo)
+    return this.curve._endoWnafMulAdd(points, coeffs);
+  else
+    return this.curve._wnafMulAdd(1, points, coeffs, 2);
+};
 
-    // JIT
-    _x3 = compile(type);
-    _x4 = value;
-    _x5 = strict;
-    _again = true;
-    continue _function;
-  }
-}
+Point.prototype.jmulAdd = function jmulAdd(k1, p2, k2) {
+  var points = [ this, p2 ];
+  var coeffs = [ k1, k2 ];
+  if (this.curve.endo)
+    return this.curve._endoWnafMulAdd(points, coeffs, true);
+  else
+    return this.curve._wnafMulAdd(1, points, coeffs, 2, true);
+};
 
-// assign all types to typeforce function
-var typeName;
-Object.keys(nativeTypes).forEach(function (typeName) {
-  var nativeType = nativeTypes[typeName];
-  nativeType.toJSON = function () {
-    return typeName;
-  };
+Point.prototype.eq = function eq(p) {
+  return this === p ||
+         this.inf === p.inf &&
+             (this.inf || this.x.cmp(p.x) === 0 && this.y.cmp(p.y) === 0);
+};
 
-  typeforce[typeName] = nativeType;
-});
+Point.prototype.neg = function neg(_precompute) {
+  if (this.inf)
+    return this;
 
-for (typeName in otherTypes) {
-  typeforce[typeName] = otherTypes[typeName];
-}
+  var res = this.curve.point(this.x, this.y.redNeg());
+  if (_precompute && this.precomputed) {
+    var pre = this.precomputed;
+    var negate = function(p) {
+      return p.neg();
+    };
+    res.precomputed = {
+      naf: pre.naf && {
+        wnd: pre.naf.wnd,
+        points: pre.naf.points.map(negate)
+      },
+      doubles: pre.doubles && {
+        step: pre.doubles.step,
+        points: pre.doubles.points.map(negate)
+      }
+    };
+  }
+  return res;
+};
 
-module.exports = typeforce;
-module.exports.compile = compile;
-}).call(this,require("buffer").Buffer)
-},{"buffer":7}],54:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var base58check = require('bs58check')
-var typeForce = require('typeforce')
-var networks = require('./networks')
-var scripts = require('./scripts')
+Point.prototype.toJ = function toJ() {
+  if (this.inf)
+    return this.curve.jpoint(null, null, null);
 
-function findScriptTypeByVersion (version) {
-  for (var networkName in networks) {
-    var network = networks[networkName]
+  var res = this.curve.jpoint(this.x, this.y, this.curve.one);
+  return res;
+};
 
-    if (version === network.pubKeyHash) return 'pubkeyhash'
-    if (version === network.scriptHash) return 'scripthash'
+function JPoint(curve, x, y, z) {
+  Base.BasePoint.call(this, curve, 'jacobian');
+  if (x === null && y === null && z === null) {
+    this.x = this.curve.one;
+    this.y = this.curve.one;
+    this.z = new BN(0);
+  } else {
+    this.x = new BN(x, 16);
+    this.y = new BN(y, 16);
+    this.z = new BN(z, 16);
   }
+  if (!this.x.red)
+    this.x = this.x.toRed(this.curve.red);
+  if (!this.y.red)
+    this.y = this.y.toRed(this.curve.red);
+  if (!this.z.red)
+    this.z = this.z.toRed(this.curve.red);
+
+  this.zOne = this.z === this.curve.one;
 }
+inherits(JPoint, Base.BasePoint);
 
-function Address (hash, version) {
-  typeForce('Buffer', hash)
+ShortCurve.prototype.jpoint = function jpoint(x, y, z) {
+  return new JPoint(this, x, y, z);
+};
 
-  assert.strictEqual(hash.length, 20, 'Invalid hash length')
-  assert.strictEqual(version & 0xff, version, 'Invalid version byte')
+JPoint.prototype.toP = function toP() {
+  if (this.isInfinity())
+    return this.curve.point(null, null);
 
-  this.hash = hash
-  this.version = version
-}
+  var zinv = this.z.redInvm();
+  var zinv2 = zinv.redSqr();
+  var ax = this.x.redMul(zinv2);
+  var ay = this.y.redMul(zinv2).redMul(zinv);
 
-Address.fromBase58Check = function (string) {
-  var payload = base58check.decode(string)
-  var version = payload.readUInt8(0)
-  var hash = payload.slice(1)
+  return this.curve.point(ax, ay);
+};
 
-  return new Address(hash, version)
-}
+JPoint.prototype.neg = function neg() {
+  return this.curve.jpoint(this.x, this.y.redNeg(), this.z);
+};
 
-Address.fromOutputScript = function (script, network) {
-  network = network || networks.bitcoin
+JPoint.prototype.add = function add(p) {
+  // O + P = P
+  if (this.isInfinity())
+    return p;
 
-  if (scripts.isPubKeyHashOutput(script)) return new Address(script.chunks[2], network.pubKeyHash)
-  if (scripts.isScriptHashOutput(script)) return new Address(script.chunks[1], network.scriptHash)
+  // P + O = P
+  if (p.isInfinity())
+    return this;
 
-  assert(false, script.toASM() + ' has no matching Address')
-}
+  // 12M + 4S + 7A
+  var pz2 = p.z.redSqr();
+  var z2 = this.z.redSqr();
+  var u1 = this.x.redMul(pz2);
+  var u2 = p.x.redMul(z2);
+  var s1 = this.y.redMul(pz2.redMul(p.z));
+  var s2 = p.y.redMul(z2.redMul(this.z));
+
+  var h = u1.redSub(u2);
+  var r = s1.redSub(s2);
+  if (h.cmpn(0) === 0) {
+    if (r.cmpn(0) !== 0)
+      return this.curve.jpoint(null, null, null);
+    else
+      return this.dbl();
+  }
 
-Address.prototype.toBase58Check = function () {
-  var payload = new Buffer(21)
-  payload.writeUInt8(this.version, 0)
-  this.hash.copy(payload, 1)
+  var h2 = h.redSqr();
+  var h3 = h2.redMul(h);
+  var v = u1.redMul(h2);
 
-  return base58check.encode(payload)
-}
+  var nx = r.redSqr().redIAdd(h3).redISub(v).redISub(v);
+  var ny = r.redMul(v.redISub(nx)).redISub(s1.redMul(h3));
+  var nz = this.z.redMul(p.z).redMul(h);
 
-Address.prototype.toOutputScript = function () {
-  var scriptType = findScriptTypeByVersion(this.version)
+  return this.curve.jpoint(nx, ny, nz);
+};
 
-  if (scriptType === 'pubkeyhash') return scripts.pubKeyHashOutput(this.hash)
-  if (scriptType === 'scripthash') return scripts.scriptHashOutput(this.hash)
+JPoint.prototype.mixedAdd = function mixedAdd(p) {
+  // O + P = P
+  if (this.isInfinity())
+    return p.toJ();
 
-  assert(false, this.toString() + ' has no matching Script')
-}
+  // P + O = P
+  if (p.isInfinity())
+    return this;
 
-Address.prototype.toString = Address.prototype.toBase58Check
+  // 8M + 3S + 7A
+  var z2 = this.z.redSqr();
+  var u1 = this.x;
+  var u2 = p.x.redMul(z2);
+  var s1 = this.y;
+  var s2 = p.y.redMul(z2).redMul(this.z);
+
+  var h = u1.redSub(u2);
+  var r = s1.redSub(s2);
+  if (h.cmpn(0) === 0) {
+    if (r.cmpn(0) !== 0)
+      return this.curve.jpoint(null, null, null);
+    else
+      return this.dbl();
+  }
 
-module.exports = Address
+  var h2 = h.redSqr();
+  var h3 = h2.redMul(h);
+  var v = u1.redMul(h2);
 
-}).call(this,require("buffer").Buffer)
-},{"./networks":66,"./scripts":69,"assert":5,"bs58check":31,"buffer":7,"typeforce":53}],55:[function(require,module,exports){
-var bs58check = require('bs58check')
+  var nx = r.redSqr().redIAdd(h3).redISub(v).redISub(v);
+  var ny = r.redMul(v.redISub(nx)).redISub(s1.redMul(h3));
+  var nz = this.z.redMul(h);
 
-function decode () {
-  console.warn('bs58check will be removed in 2.0.0. require("bs58check") instead.')
+  return this.curve.jpoint(nx, ny, nz);
+};
 
-  return bs58check.decode.apply(undefined, arguments)
-}
+JPoint.prototype.dblp = function dblp(pow) {
+  if (pow === 0)
+    return this;
+  if (this.isInfinity())
+    return this;
+  if (!pow)
+    return this.dbl();
+
+  if (this.curve.zeroA || this.curve.threeA) {
+    var r = this;
+    for (var i = 0; i < pow; i++)
+      r = r.dbl();
+    return r;
+  }
+
+  // 1M + 2S + 1A + N * (4S + 5M + 8A)
+  // N = 1 => 6M + 6S + 9A
+  var a = this.curve.a;
+  var tinv = this.curve.tinv;
+
+  var jx = this.x;
+  var jy = this.y;
+  var jz = this.z;
+  var jz4 = jz.redSqr().redSqr();
+
+  // Reuse results
+  var jyd = jy.redAdd(jy);
+  for (var i = 0; i < pow; i++) {
+    var jx2 = jx.redSqr();
+    var jyd2 = jyd.redSqr();
+    var jyd4 = jyd2.redSqr();
+    var c = jx2.redAdd(jx2).redIAdd(jx2).redIAdd(a.redMul(jz4));
+
+    var t1 = jx.redMul(jyd2);
+    var nx = c.redSqr().redISub(t1.redAdd(t1));
+    var t2 = t1.redISub(nx);
+    var dny = c.redMul(t2);
+    dny = dny.redIAdd(dny).redISub(jyd4);
+    var nz = jyd.redMul(jz);
+    if (i + 1 < pow)
+      jz4 = jz4.redMul(jyd4);
+
+    jx = nx;
+    jz = nz;
+    jyd = dny;
+  }
+
+  return this.curve.jpoint(jx, jyd.redMul(tinv), jz);
+};
 
-function encode () {
-  console.warn('bs58check will be removed in 2.0.0. require("bs58check") instead.')
+JPoint.prototype.dbl = function dbl() {
+  if (this.isInfinity())
+    return this;
 
-  return bs58check.encode.apply(undefined, arguments)
-}
+  if (this.curve.zeroA)
+    return this._zeroDbl();
+  else if (this.curve.threeA)
+    return this._threeDbl();
+  else
+    return this._dbl();
+};
 
-module.exports = {
-  decode: decode,
-  encode: encode
-}
+JPoint.prototype._zeroDbl = function _zeroDbl() {
+  var nx;
+  var ny;
+  var nz;
+  // Z = 1
+  if (this.zOne) {
+    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html
+    //     #doubling-mdbl-2007-bl
+    // 1M + 5S + 14A
+
+    // XX = X1^2
+    var xx = this.x.redSqr();
+    // YY = Y1^2
+    var yy = this.y.redSqr();
+    // YYYY = YY^2
+    var yyyy = yy.redSqr();
+    // S = 2 * ((X1 + YY)^2 - XX - YYYY)
+    var s = this.x.redAdd(yy).redSqr().redISub(xx).redISub(yyyy);
+    s = s.redIAdd(s);
+    // M = 3 * XX + a; a = 0
+    var m = xx.redAdd(xx).redIAdd(xx);
+    // T = M ^ 2 - 2*S
+    var t = m.redSqr().redISub(s).redISub(s);
+
+    // 8 * YYYY
+    var yyyy8 = yyyy.redIAdd(yyyy);
+    yyyy8 = yyyy8.redIAdd(yyyy8);
+    yyyy8 = yyyy8.redIAdd(yyyy8);
+
+    // X3 = T
+    nx = t;
+    // Y3 = M * (S - T) - 8 * YYYY
+    ny = m.redMul(s.redISub(t)).redISub(yyyy8);
+    // Z3 = 2*Y1
+    nz = this.y.redAdd(this.y);
+  } else {
+    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html
+    //     #doubling-dbl-2009-l
+    // 2M + 5S + 13A
+
+    // A = X1^2
+    var a = this.x.redSqr();
+    // B = Y1^2
+    var b = this.y.redSqr();
+    // C = B^2
+    var c = b.redSqr();
+    // D = 2 * ((X1 + B)^2 - A - C)
+    var d = this.x.redAdd(b).redSqr().redISub(a).redISub(c);
+    d = d.redIAdd(d);
+    // E = 3 * A
+    var e = a.redAdd(a).redIAdd(a);
+    // F = E^2
+    var f = e.redSqr();
+
+    // 8 * C
+    var c8 = c.redIAdd(c);
+    c8 = c8.redIAdd(c8);
+    c8 = c8.redIAdd(c8);
+
+    // X3 = F - 2 * D
+    nx = f.redISub(d).redISub(d);
+    // Y3 = E * (D - X3) - 8 * C
+    ny = e.redMul(d.redISub(nx)).redISub(c8);
+    // Z3 = 2 * Y1 * Z1
+    nz = this.y.redMul(this.z);
+    nz = nz.redIAdd(nz);
+  }
+
+  return this.curve.jpoint(nx, ny, nz);
+};
 
-},{"bs58check":31}],56:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var bufferutils = require('./bufferutils')
-var crypto = require('./crypto')
+JPoint.prototype._threeDbl = function _threeDbl() {
+  var nx;
+  var ny;
+  var nz;
+  // Z = 1
+  if (this.zOne) {
+    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html
+    //     #doubling-mdbl-2007-bl
+    // 1M + 5S + 15A
+
+    // XX = X1^2
+    var xx = this.x.redSqr();
+    // YY = Y1^2
+    var yy = this.y.redSqr();
+    // YYYY = YY^2
+    var yyyy = yy.redSqr();
+    // S = 2 * ((X1 + YY)^2 - XX - YYYY)
+    var s = this.x.redAdd(yy).redSqr().redISub(xx).redISub(yyyy);
+    s = s.redIAdd(s);
+    // M = 3 * XX + a
+    var m = xx.redAdd(xx).redIAdd(xx).redIAdd(this.curve.a);
+    // T = M^2 - 2 * S
+    var t = m.redSqr().redISub(s).redISub(s);
+    // X3 = T
+    nx = t;
+    // Y3 = M * (S - T) - 8 * YYYY
+    var yyyy8 = yyyy.redIAdd(yyyy);
+    yyyy8 = yyyy8.redIAdd(yyyy8);
+    yyyy8 = yyyy8.redIAdd(yyyy8);
+    ny = m.redMul(s.redISub(t)).redISub(yyyy8);
+    // Z3 = 2 * Y1
+    nz = this.y.redAdd(this.y);
+  } else {
+    // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-3.html#doubling-dbl-2001-b
+    // 3M + 5S
+
+    // delta = Z1^2
+    var delta = this.z.redSqr();
+    // gamma = Y1^2
+    var gamma = this.y.redSqr();
+    // beta = X1 * gamma
+    var beta = this.x.redMul(gamma);
+    // alpha = 3 * (X1 - delta) * (X1 + delta)
+    var alpha = this.x.redSub(delta).redMul(this.x.redAdd(delta));
+    alpha = alpha.redAdd(alpha).redIAdd(alpha);
+    // X3 = alpha^2 - 8 * beta
+    var beta4 = beta.redIAdd(beta);
+    beta4 = beta4.redIAdd(beta4);
+    var beta8 = beta4.redAdd(beta4);
+    nx = alpha.redSqr().redISub(beta8);
+    // Z3 = (Y1 + Z1)^2 - gamma - delta
+    nz = this.y.redAdd(this.z).redSqr().redISub(gamma).redISub(delta);
+    // Y3 = alpha * (4 * beta - X3) - 8 * gamma^2
+    var ggamma8 = gamma.redSqr();
+    ggamma8 = ggamma8.redIAdd(ggamma8);
+    ggamma8 = ggamma8.redIAdd(ggamma8);
+    ggamma8 = ggamma8.redIAdd(ggamma8);
+    ny = alpha.redMul(beta4.redISub(nx)).redISub(ggamma8);
+  }
+
+  return this.curve.jpoint(nx, ny, nz);
+};
 
-var Transaction = require('./transaction')
+JPoint.prototype._dbl = function _dbl() {
+  var a = this.curve.a;
 
-function Block () {
-  this.version = 1
-  this.prevHash = null
-  this.merkleRoot = null
-  this.timestamp = 0
-  this.bits = 0
-  this.nonce = 0
-}
+  // 4M + 6S + 10A
+  var jx = this.x;
+  var jy = this.y;
+  var jz = this.z;
+  var jz4 = jz.redSqr().redSqr();
 
-Block.fromBuffer = function (buffer) {
-  assert(buffer.length >= 80, 'Buffer too small (< 80 bytes)')
+  var jx2 = jx.redSqr();
+  var jy2 = jy.redSqr();
 
-  var offset = 0
-  function readSlice (n) {
-    offset += n
-    return buffer.slice(offset - n, offset)
-  }
+  var c = jx2.redAdd(jx2).redIAdd(jx2).redIAdd(a.redMul(jz4));
 
-  function readUInt32 () {
-    var i = buffer.readUInt32LE(offset)
-    offset += 4
-    return i
-  }
+  var jxd4 = jx.redAdd(jx);
+  jxd4 = jxd4.redIAdd(jxd4);
+  var t1 = jxd4.redMul(jy2);
+  var nx = c.redSqr().redISub(t1.redAdd(t1));
+  var t2 = t1.redISub(nx);
 
-  var block = new Block()
-  block.version = readUInt32()
-  block.prevHash = readSlice(32)
-  block.merkleRoot = readSlice(32)
-  block.timestamp = readUInt32()
-  block.bits = readUInt32()
-  block.nonce = readUInt32()
+  var jyd8 = jy2.redSqr();
+  jyd8 = jyd8.redIAdd(jyd8);
+  jyd8 = jyd8.redIAdd(jyd8);
+  jyd8 = jyd8.redIAdd(jyd8);
+  var ny = c.redMul(t2).redISub(jyd8);
+  var nz = jy.redAdd(jy).redMul(jz);
 
-  if (buffer.length === 80) return block
+  return this.curve.jpoint(nx, ny, nz);
+};
 
-  function readVarInt () {
-    var vi = bufferutils.readVarInt(buffer, offset)
-    offset += vi.size
-    return vi.number
-  }
+JPoint.prototype.trpl = function trpl() {
+  if (!this.curve.zeroA)
+    return this.dbl().add(this);
+
+  // hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html#tripling-tpl-2007-bl
+  // 5M + 10S + ...
+
+  // XX = X1^2
+  var xx = this.x.redSqr();
+  // YY = Y1^2
+  var yy = this.y.redSqr();
+  // ZZ = Z1^2
+  var zz = this.z.redSqr();
+  // YYYY = YY^2
+  var yyyy = yy.redSqr();
+  // M = 3 * XX + a * ZZ2; a = 0
+  var m = xx.redAdd(xx).redIAdd(xx);
+  // MM = M^2
+  var mm = m.redSqr();
+  // E = 6 * ((X1 + YY)^2 - XX - YYYY) - MM
+  var e = this.x.redAdd(yy).redSqr().redISub(xx).redISub(yyyy);
+  e = e.redIAdd(e);
+  e = e.redAdd(e).redIAdd(e);
+  e = e.redISub(mm);
+  // EE = E^2
+  var ee = e.redSqr();
+  // T = 16*YYYY
+  var t = yyyy.redIAdd(yyyy);
+  t = t.redIAdd(t);
+  t = t.redIAdd(t);
+  t = t.redIAdd(t);
+  // U = (M + E)^2 - MM - EE - T
+  var u = m.redIAdd(e).redSqr().redISub(mm).redISub(ee).redISub(t);
+  // X3 = 4 * (X1 * EE - 4 * YY * U)
+  var yyu4 = yy.redMul(u);
+  yyu4 = yyu4.redIAdd(yyu4);
+  yyu4 = yyu4.redIAdd(yyu4);
+  var nx = this.x.redMul(ee).redISub(yyu4);
+  nx = nx.redIAdd(nx);
+  nx = nx.redIAdd(nx);
+  // Y3 = 8 * Y1 * (U * (T - U) - E * EE)
+  var ny = this.y.redMul(u.redMul(t.redISub(u)).redISub(e.redMul(ee)));
+  ny = ny.redIAdd(ny);
+  ny = ny.redIAdd(ny);
+  ny = ny.redIAdd(ny);
+  // Z3 = (Z1 + E)^2 - ZZ - EE
+  var nz = this.z.redAdd(e).redSqr().redISub(zz).redISub(ee);
+
+  return this.curve.jpoint(nx, ny, nz);
+};
 
-  // FIXME: poor performance
-  function readTransaction () {
-    var tx = Transaction.fromBuffer(buffer.slice(offset), true)
+JPoint.prototype.mul = function mul(k, kbase) {
+  k = new BN(k, kbase);
 
-    offset += tx.toBuffer().length
-    return tx
-  }
+  return this.curve._wnafMul(this, k);
+};
 
-  var nTransactions = readVarInt()
-  block.transactions = []
+JPoint.prototype.eq = function eq(p) {
+  if (p.type === 'affine')
+    return this.eq(p.toJ());
 
-  for (var i = 0; i < nTransactions; ++i) {
-    var tx = readTransaction()
-    block.transactions.push(tx)
+  if (this === p)
+    return true;
+
+  // x1 * z2^2 == x2 * z1^2
+  var z2 = this.z.redSqr();
+  var pz2 = p.z.redSqr();
+  if (this.x.redMul(pz2).redISub(p.x.redMul(z2)).cmpn(0) !== 0)
+    return false;
+
+  // y1 * z2^3 == y2 * z1^3
+  var z3 = z2.redMul(this.z);
+  var pz3 = pz2.redMul(p.z);
+  return this.y.redMul(pz3).redISub(p.y.redMul(z3)).cmpn(0) === 0;
+};
+
+JPoint.prototype.eqXToP = function eqXToP(x) {
+  var zs = this.z.redSqr();
+  var rx = x.toRed(this.curve.red).redMul(zs);
+  if (this.x.cmp(rx) === 0)
+    return true;
+
+  var xc = x.clone();
+  var t = this.curve.redN.redMul(zs);
+  for (;;) {
+    xc.iadd(this.curve.n);
+    if (xc.cmp(this.curve.p) >= 0)
+      return false;
+
+    rx.redIAdd(t);
+    if (this.x.cmp(rx) === 0)
+      return true;
   }
+  return false;
+};
 
-  return block
-}
+JPoint.prototype.inspect = function inspect() {
+  if (this.isInfinity())
+    return '<EC JPoint Infinity>';
+  return '<EC JPoint x: ' + this.x.toString(16, 2) +
+      ' y: ' + this.y.toString(16, 2) +
+      ' z: ' + this.z.toString(16, 2) + '>';
+};
 
-Block.fromHex = function (hex) {
-  return Block.fromBuffer(new Buffer(hex, 'hex'))
-}
+JPoint.prototype.isInfinity = function isInfinity() {
+  // XXX This code assumes that zero is always zero in red
+  return this.z.cmpn(0) === 0;
+};
 
-Block.prototype.getHash = function () {
-  return crypto.hash256(this.toBuffer(true))
-}
+},{"../../elliptic":39,"../curve":42,"bn.js":33,"inherits":63}],45:[function(require,module,exports){
+'use strict';
 
-Block.prototype.getId = function () {
-  return bufferutils.reverse(this.getHash()).toString('hex')
-}
+var curves = exports;
 
-Block.prototype.getUTCDate = function () {
-  var date = new Date(0) // epoch
-  date.setUTCSeconds(this.timestamp)
+var hash = require('hash.js');
+var elliptic = require('../elliptic');
 
-  return date
+var assert = elliptic.utils.assert;
+
+function PresetCurve(options) {
+  if (options.type === 'short')
+    this.curve = new elliptic.curve.short(options);
+  else if (options.type === 'edwards')
+    this.curve = new elliptic.curve.edwards(options);
+  else
+    this.curve = new elliptic.curve.mont(options);
+  this.g = this.curve.g;
+  this.n = this.curve.n;
+  this.hash = options.hash;
+
+  assert(this.g.validate(), 'Invalid curve');
+  assert(this.g.mul(this.n).isInfinity(), 'Invalid curve, G*N != O');
+}
+curves.PresetCurve = PresetCurve;
+
+function defineCurve(name, options) {
+  Object.defineProperty(curves, name, {
+    configurable: true,
+    enumerable: true,
+    get: function() {
+      var curve = new PresetCurve(options);
+      Object.defineProperty(curves, name, {
+        configurable: true,
+        enumerable: true,
+        value: curve
+      });
+      return curve;
+    }
+  });
 }
 
-Block.prototype.toBuffer = function (headersOnly) {
-  var buffer = new Buffer(80)
+defineCurve('p192', {
+  type: 'short',
+  prime: 'p192',
+  p: 'ffffffff ffffffff ffffffff fffffffe ffffffff ffffffff',
+  a: 'ffffffff ffffffff ffffffff fffffffe ffffffff fffffffc',
+  b: '64210519 e59c80e7 0fa7e9ab 72243049 feb8deec c146b9b1',
+  n: 'ffffffff ffffffff ffffffff 99def836 146bc9b1 b4d22831',
+  hash: hash.sha256,
+  gRed: false,
+  g: [
+    '188da80e b03090f6 7cbf20eb 43a18800 f4ff0afd 82ff1012',
+    '07192b95 ffc8da78 631011ed 6b24cdd5 73f977a1 1e794811'
+  ]
+});
 
-  var offset = 0
-  function writeSlice (slice) {
-    slice.copy(buffer, offset)
-    offset += slice.length
-  }
+defineCurve('p224', {
+  type: 'short',
+  prime: 'p224',
+  p: 'ffffffff ffffffff ffffffff ffffffff 00000000 00000000 00000001',
+  a: 'ffffffff ffffffff ffffffff fffffffe ffffffff ffffffff fffffffe',
+  b: 'b4050a85 0c04b3ab f5413256 5044b0b7 d7bfd8ba 270b3943 2355ffb4',
+  n: 'ffffffff ffffffff ffffffff ffff16a2 e0b8f03e 13dd2945 5c5c2a3d',
+  hash: hash.sha256,
+  gRed: false,
+  g: [
+    'b70e0cbd 6bb4bf7f 321390b9 4a03c1d3 56c21122 343280d6 115c1d21',
+    'bd376388 b5f723fb 4c22dfe6 cd4375a0 5a074764 44d58199 85007e34'
+  ]
+});
 
-  function writeUInt32 (i) {
-    buffer.writeUInt32LE(i, offset)
-    offset += 4
-  }
+defineCurve('p256', {
+  type: 'short',
+  prime: null,
+  p: 'ffffffff 00000001 00000000 00000000 00000000 ffffffff ffffffff ffffffff',
+  a: 'ffffffff 00000001 00000000 00000000 00000000 ffffffff ffffffff fffffffc',
+  b: '5ac635d8 aa3a93e7 b3ebbd55 769886bc 651d06b0 cc53b0f6 3bce3c3e 27d2604b',
+  n: 'ffffffff 00000000 ffffffff ffffffff bce6faad a7179e84 f3b9cac2 fc632551',
+  hash: hash.sha256,
+  gRed: false,
+  g: [
+    '6b17d1f2 e12c4247 f8bce6e5 63a440f2 77037d81 2deb33a0 f4a13945 d898c296',
+    '4fe342e2 fe1a7f9b 8ee7eb4a 7c0f9e16 2bce3357 6b315ece cbb64068 37bf51f5'
+  ]
+});
 
-  writeUInt32(this.version)
-  writeSlice(this.prevHash)
-  writeSlice(this.merkleRoot)
-  writeUInt32(this.timestamp)
-  writeUInt32(this.bits)
-  writeUInt32(this.nonce)
+defineCurve('p384', {
+  type: 'short',
+  prime: null,
+  p: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +
+     'fffffffe ffffffff 00000000 00000000 ffffffff',
+  a: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +
+     'fffffffe ffffffff 00000000 00000000 fffffffc',
+  b: 'b3312fa7 e23ee7e4 988e056b e3f82d19 181d9c6e fe814112 0314088f ' +
+     '5013875a c656398d 8a2ed19d 2a85c8ed d3ec2aef',
+  n: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff c7634d81 ' +
+     'f4372ddf 581a0db2 48b0a77a ecec196a ccc52973',
+  hash: hash.sha384,
+  gRed: false,
+  g: [
+    'aa87ca22 be8b0537 8eb1c71e f320ad74 6e1d3b62 8ba79b98 59f741e0 82542a38 ' +
+    '5502f25d bf55296c 3a545e38 72760ab7',
+    '3617de4a 96262c6f 5d9e98bf 9292dc29 f8f41dbd 289a147c e9da3113 b5f0b8c0 ' +
+    '0a60b1ce 1d7e819d 7a431d7c 90ea0e5f'
+  ]
+});
 
-  if (headersOnly || !this.transactions) return buffer
+defineCurve('p521', {
+  type: 'short',
+  prime: null,
+  p: '000001ff ffffffff ffffffff ffffffff ffffffff ffffffff ' +
+     'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +
+     'ffffffff ffffffff ffffffff ffffffff ffffffff',
+  a: '000001ff ffffffff ffffffff ffffffff ffffffff ffffffff ' +
+     'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ' +
+     'ffffffff ffffffff ffffffff ffffffff fffffffc',
+  b: '00000051 953eb961 8e1c9a1f 929a21a0 b68540ee a2da725b ' +
+     '99b315f3 b8b48991 8ef109e1 56193951 ec7e937b 1652c0bd ' +
+     '3bb1bf07 3573df88 3d2c34f1 ef451fd4 6b503f00',
+  n: '000001ff ffffffff ffffffff ffffffff ffffffff ffffffff ' +
+     'ffffffff ffffffff fffffffa 51868783 bf2f966b 7fcc0148 ' +
+     'f709a5d0 3bb5c9b8 899c47ae bb6fb71e 91386409',
+  hash: hash.sha512,
+  gRed: false,
+  g: [
+    '000000c6 858e06b7 0404e9cd 9e3ecb66 2395b442 9c648139 ' +
+    '053fb521 f828af60 6b4d3dba a14b5e77 efe75928 fe1dc127 ' +
+    'a2ffa8de 3348b3c1 856a429b f97e7e31 c2e5bd66',
+    '00000118 39296a78 9a3bc004 5c8a5fb4 2c7d1bd9 98f54449 ' +
+    '579b4468 17afbd17 273e662c 97ee7299 5ef42640 c550b901 ' +
+    '3fad0761 353c7086 a272c240 88be9476 9fd16650'
+  ]
+});
 
-  var txLenBuffer = bufferutils.varIntBuffer(this.transactions.length)
-  var txBuffers = this.transactions.map(function (tx) {
-    return tx.toBuffer()
-  })
+defineCurve('curve25519', {
+  type: 'mont',
+  prime: 'p25519',
+  p: '7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffed',
+  a: '76d06',
+  b: '1',
+  n: '1000000000000000 0000000000000000 14def9dea2f79cd6 5812631a5cf5d3ed',
+  hash: hash.sha256,
+  gRed: false,
+  g: [
+    '9'
+  ]
+});
 
-  return Buffer.concat([buffer, txLenBuffer].concat(txBuffers))
-}
+defineCurve('ed25519', {
+  type: 'edwards',
+  prime: 'p25519',
+  p: '7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffed',
+  a: '-1',
+  c: '1',
+  // -121665 * (121666^(-1)) (mod P)
+  d: '52036cee2b6ffe73 8cc740797779e898 00700a4d4141d8ab 75eb4dca135978a3',
+  n: '1000000000000000 0000000000000000 14def9dea2f79cd6 5812631a5cf5d3ed',
+  hash: hash.sha256,
+  gRed: false,
+  g: [
+    '216936d3cd6e53fec0a4e231fdd6dc5c692cc7609525a7b2c9562d608f25d51a',
+
+    // 4/5
+    '6666666666666666666666666666666666666666666666666666666666666658'
+  ]
+});
 
-Block.prototype.toHex = function (headersOnly) {
-  return this.toBuffer(headersOnly).toString('hex')
-}
+var pre;
+try {
+  pre = require('./precomputed/secp256k1');
+} catch (e) {
+  pre = undefined;
+}
+
+defineCurve('secp256k1', {
+  type: 'short',
+  prime: 'k256',
+  p: 'ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffffe fffffc2f',
+  a: '0',
+  b: '7',
+  n: 'ffffffff ffffffff ffffffff fffffffe baaedce6 af48a03b bfd25e8c d0364141',
+  h: '1',
+  hash: hash.sha256,
+
+  // Precomputed endomorphism
+  beta: '7ae96a2b657c07106e64479eac3434e99cf0497512f58995c1396c28719501ee',
+  lambda: '5363ad4cc05c30e0a5261c028812645a122e22ea20816678df02967c1b23bd72',
+  basis: [
+    {
+      a: '3086d221a7d46bcde86c90e49284eb15',
+      b: '-e4437ed6010e88286f547fa90abfe4c3'
+    },
+    {
+      a: '114ca50f7a8e2f3f657c1108d9d44cfd8',
+      b: '3086d221a7d46bcde86c90e49284eb15'
+    }
+  ],
 
-module.exports = Block
+  gRed: false,
+  g: [
+    '79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798',
+    '483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8',
+    pre
+  ]
+});
 
-}).call(this,require("buffer").Buffer)
-},{"./bufferutils":57,"./crypto":58,"./transaction":70,"assert":5,"buffer":7}],57:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var opcodes = require('./opcodes')
+},{"../elliptic":39,"./precomputed/secp256k1":53,"hash.js":57}],46:[function(require,module,exports){
+'use strict';
 
-// https://github.com/feross/buffer/blob/master/index.js#L1127
-function verifuint (value, max) {
-  assert(typeof value === 'number', 'cannot write a non-number as a number')
-  assert(value >= 0, 'specified a negative value for writing an unsigned value')
-  assert(value <= max, 'value is larger than maximum value for type')
-  assert(Math.floor(value) === value, 'value has a fractional component')
-}
+var BN = require('bn.js');
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
+var assert = utils.assert;
 
-function pushDataSize (i) {
-  return i < opcodes.OP_PUSHDATA1 ? 1
-  : i < 0xff ? 2
-  : i < 0xffff ? 3
-  : 5
-}
+var KeyPair = require('./key');
+var Signature = require('./signature');
 
-function readPushDataInt (buffer, offset) {
-  var opcode = buffer.readUInt8(offset)
-  var number, size
+function EC(options) {
+  if (!(this instanceof EC))
+    return new EC(options);
 
-  // ~6 bit
-  if (opcode < opcodes.OP_PUSHDATA1) {
-    number = opcode
-    size = 1
+  // Shortcut `elliptic.ec(curve-name)`
+  if (typeof options === 'string') {
+    assert(elliptic.curves.hasOwnProperty(options), 'Unknown curve ' + options);
 
-  // 8 bit
-  } else if (opcode === opcodes.OP_PUSHDATA1) {
-    if (offset + 2 > buffer.length) return null
-    number = buffer.readUInt8(offset + 1)
-    size = 2
+    options = elliptic.curves[options];
+  }
 
-  // 16 bit
-  } else if (opcode === opcodes.OP_PUSHDATA2) {
-    if (offset + 3 > buffer.length) return null
-    number = buffer.readUInt16LE(offset + 1)
-    size = 3
+  // Shortcut for `elliptic.ec(elliptic.curves.curveName)`
+  if (options instanceof elliptic.curves.PresetCurve)
+    options = { curve: options };
 
-  // 32 bit
-  } else {
-    if (offset + 5 > buffer.length) return null
-    assert.equal(opcode, opcodes.OP_PUSHDATA4, 'Unexpected opcode')
+  this.curve = options.curve.curve;
+  this.n = this.curve.n;
+  this.nh = this.n.ushrn(1);
+  this.g = this.curve.g;
 
-    number = buffer.readUInt32LE(offset + 1)
-    size = 5
-  }
+  // Point on curve
+  this.g = options.curve.g;
+  this.g.precompute(options.curve.n.bitLength() + 1);
 
-  return {
-    opcode: opcode,
-    number: number,
-    size: size
-  }
+  // Hash for function for DRBG
+  this.hash = options.hash || options.curve.hash;
 }
+module.exports = EC;
 
-function readUInt64LE (buffer, offset) {
-  var a = buffer.readUInt32LE(offset)
-  var b = buffer.readUInt32LE(offset + 4)
-  b *= 0x100000000
+EC.prototype.keyPair = function keyPair(options) {
+  return new KeyPair(this, options);
+};
 
-  verifuint(b + a, 0x001fffffffffffff)
+EC.prototype.keyFromPrivate = function keyFromPrivate(priv, enc) {
+  return KeyPair.fromPrivate(this, priv, enc);
+};
 
-  return b + a
-}
+EC.prototype.keyFromPublic = function keyFromPublic(pub, enc) {
+  return KeyPair.fromPublic(this, pub, enc);
+};
 
-function readVarInt (buffer, offset) {
-  var t = buffer.readUInt8(offset)
-  var number, size
+EC.prototype.genKeyPair = function genKeyPair(options) {
+  if (!options)
+    options = {};
 
-  // 8 bit
-  if (t < 253) {
-    number = t
-    size = 1
+  // Instantiate Hmac_DRBG
+  var drbg = new elliptic.hmacDRBG({
+    hash: this.hash,
+    pers: options.pers,
+    entropy: options.entropy || elliptic.rand(this.hash.hmacStrength),
+    nonce: this.n.toArray()
+  });
 
-  // 16 bit
-  } else if (t < 254) {
-    number = buffer.readUInt16LE(offset + 1)
-    size = 3
+  var bytes = this.n.byteLength();
+  var ns2 = this.n.sub(new BN(2));
+  do {
+    var priv = new BN(drbg.generate(bytes));
+    if (priv.cmp(ns2) > 0)
+      continue;
 
-  // 32 bit
-  } else if (t < 255) {
-    number = buffer.readUInt32LE(offset + 1)
-    size = 5
+    priv.iaddn(1);
+    return this.keyFromPrivate(priv);
+  } while (true);
+};
 
-  // 64 bit
-  } else {
-    number = readUInt64LE(buffer, offset + 1)
-    size = 9
-  }
+EC.prototype._truncateToN = function truncateToN(msg, truncOnly) {
+  var delta = msg.byteLength() * 8 - this.n.bitLength();
+  if (delta > 0)
+    msg = msg.ushrn(delta);
+  if (!truncOnly && msg.cmp(this.n) >= 0)
+    return msg.sub(this.n);
+  else
+    return msg;
+};
 
-  return {
-    number: number,
-    size: size
+EC.prototype.sign = function sign(msg, key, enc, options) {
+  if (typeof enc === 'object') {
+    options = enc;
+    enc = null;
   }
-}
+  if (!options)
+    options = {};
 
-function writePushDataInt (buffer, number, offset) {
-  var size = pushDataSize(number)
+  key = this.keyFromPrivate(key, enc);
+  msg = this._truncateToN(new BN(msg, 16));
 
-  // ~6 bit
-  if (size === 1) {
-    buffer.writeUInt8(number, offset)
+  // Zero-extend key to provide enough entropy
+  var bytes = this.n.byteLength();
+  var bkey = key.getPrivate().toArray('be', bytes);
 
-  // 8 bit
-  } else if (size === 2) {
-    buffer.writeUInt8(opcodes.OP_PUSHDATA1, offset)
-    buffer.writeUInt8(number, offset + 1)
+  // Zero-extend nonce to have the same byte size as N
+  var nonce = msg.toArray('be', bytes);
 
-  // 16 bit
-  } else if (size === 3) {
-    buffer.writeUInt8(opcodes.OP_PUSHDATA2, offset)
-    buffer.writeUInt16LE(number, offset + 1)
+  // Instantiate Hmac_DRBG
+  var drbg = new elliptic.hmacDRBG({
+    hash: this.hash,
+    entropy: bkey,
+    nonce: nonce,
+    pers: options.pers,
+    persEnc: options.persEnc
+  });
 
-  // 32 bit
-  } else {
-    buffer.writeUInt8(opcodes.OP_PUSHDATA4, offset)
-    buffer.writeUInt32LE(number, offset + 1)
-  }
+  // Number of bytes to generate
+  var ns1 = this.n.sub(new BN(1));
 
-  return size
-}
+  for (var iter = 0; true; iter++) {
+    var k = options.k ?
+        options.k(iter) :
+        new BN(drbg.generate(this.n.byteLength()));
+    k = this._truncateToN(k, true);
+    if (k.cmpn(1) <= 0 || k.cmp(ns1) >= 0)
+      continue;
 
-function writeUInt64LE (buffer, value, offset) {
-  verifuint(value, 0x001fffffffffffff)
+    var kp = this.g.mul(k);
+    if (kp.isInfinity())
+      continue;
 
-  buffer.writeInt32LE(value & -1, offset)
-  buffer.writeUInt32LE(Math.floor(value / 0x100000000), offset + 4)
-}
+    var kpX = kp.getX();
+    var r = kpX.umod(this.n);
+    if (r.cmpn(0) === 0)
+      continue;
 
-function varIntSize (i) {
-  return i < 253 ? 1
-  : i < 0x10000 ? 3
-  : i < 0x100000000 ? 5
-  : 9
-}
+    var s = k.invm(this.n).mul(r.mul(key.getPrivate()).iadd(msg));
+    s = s.umod(this.n);
+    if (s.cmpn(0) === 0)
+      continue;
 
-function writeVarInt (buffer, number, offset) {
-  var size = varIntSize(number)
+    var recoveryParam = (kp.getY().isOdd() ? 1 : 0) |
+                        (kpX.cmp(r) !== 0 ? 2 : 0);
 
-  // 8 bit
-  if (size === 1) {
-    buffer.writeUInt8(number, offset)
+    // Use complement of `s`, if it is > `n / 2`
+    if (options.canonical && s.cmp(this.nh) > 0) {
+      s = this.n.sub(s);
+      recoveryParam ^= 1;
+    }
 
-  // 16 bit
-  } else if (size === 3) {
-    buffer.writeUInt8(253, offset)
-    buffer.writeUInt16LE(number, offset + 1)
+    return new Signature({ r: r, s: s, recoveryParam: recoveryParam });
+  }
+};
 
-  // 32 bit
-  } else if (size === 5) {
-    buffer.writeUInt8(254, offset)
-    buffer.writeUInt32LE(number, offset + 1)
+EC.prototype.verify = function verify(msg, signature, key, enc) {
+  msg = this._truncateToN(new BN(msg, 16));
+  key = this.keyFromPublic(key, enc);
+  signature = new Signature(signature, 'hex');
 
-  // 64 bit
-  } else {
-    buffer.writeUInt8(255, offset)
-    writeUInt64LE(buffer, number, offset + 1)
+  // Perform primitive values validation
+  var r = signature.r;
+  var s = signature.s;
+  if (r.cmpn(1) < 0 || r.cmp(this.n) >= 0)
+    return false;
+  if (s.cmpn(1) < 0 || s.cmp(this.n) >= 0)
+    return false;
+
+  // Validate signature
+  var sinv = s.invm(this.n);
+  var u1 = sinv.mul(msg).umod(this.n);
+  var u2 = sinv.mul(r).umod(this.n);
+
+  if (!this.curve._maxwellTrick) {
+    var p = this.g.mulAdd(u1, key.getPublic(), u2);
+    if (p.isInfinity())
+      return false;
+
+    return p.getX().umod(this.n).cmp(r) === 0;
   }
 
-  return size
-}
+  // NOTE: Greg Maxwell's trick, inspired by:
+  // https://git.io/vad3K
 
-function varIntBuffer (i) {
-  var size = varIntSize(i)
-  var buffer = new Buffer(size)
-  writeVarInt(buffer, i, 0)
+  var p = this.g.jmulAdd(u1, key.getPublic(), u2);
+  if (p.isInfinity())
+    return false;
 
-  return buffer
-}
+  // Compare `p.x` of Jacobian point with `r`,
+  // this will do `p.x == r * p.z^2` instead of multiplying `p.x` by the
+  // inverse of `p.z^2`
+  return p.eqXToP(r);
+};
 
-function reverse (buffer) {
-  var buffer2 = new Buffer(buffer)
-  Array.prototype.reverse.call(buffer2)
-  return buffer2
-}
+EC.prototype.recoverPubKey = function(msg, signature, j, enc) {
+  assert((3 & j) === j, 'The recovery param is more than two bits');
+  signature = new Signature(signature, enc);
 
-module.exports = {
-  pushDataSize: pushDataSize,
-  readPushDataInt: readPushDataInt,
-  readUInt64LE: readUInt64LE,
-  readVarInt: readVarInt,
-  reverse: reverse,
-  varIntBuffer: varIntBuffer,
-  varIntSize: varIntSize,
-  writePushDataInt: writePushDataInt,
-  writeUInt64LE: writeUInt64LE,
-  writeVarInt: writeVarInt
-}
+  var n = this.n;
+  var e = new BN(msg);
+  var r = signature.r;
+  var s = signature.s;
 
-}).call(this,require("buffer").Buffer)
-},{"./opcodes":67,"assert":5,"buffer":7}],58:[function(require,module,exports){
-var createHash = require('create-hash')
+  // A set LSB signifies that the y-coordinate is odd
+  var isYOdd = j & 1;
+  var isSecondKey = j >> 1;
+  if (r.cmp(this.curve.p.umod(this.curve.n)) >= 0 && isSecondKey)
+    throw new Error('Unable to find sencond key candinate');
+
+  // 1.1. Let x = r + jn.
+  if (isSecondKey)
+    r = this.curve.pointFromX(r.add(this.curve.n), isYOdd);
+  else
+    r = this.curve.pointFromX(r, isYOdd);
 
-function hash160 (buffer) {
-  return ripemd160(sha256(buffer))
-}
+  var rInv = signature.r.invm(n);
+  var s1 = n.sub(e).mul(rInv).umod(n);
+  var s2 = s.mul(rInv).umod(n);
+
+  // 1.6.1 Compute Q = r^-1 (sR -  eG)
+  //               Q = r^-1 (sR + -eG)
+  return this.g.mulAdd(s1, r, s2);
+};
 
-function hash256 (buffer) {
-  return sha256(sha256(buffer))
-}
+EC.prototype.getKeyRecoveryParam = function(e, signature, Q, enc) {
+  signature = new Signature(signature, enc);
+  if (signature.recoveryParam !== null)
+    return signature.recoveryParam;
 
-function ripemd160 (buffer) {
-  return createHash('rmd160').update(buffer).digest()
-}
+  for (var i = 0; i < 4; i++) {
+    var Qprime;
+    try {
+      Qprime = this.recoverPubKey(e, signature, i);
+    } catch (e) {
+      continue;
+    }
 
-function sha1 (buffer) {
-  return createHash('sha1').update(buffer).digest()
-}
+    if (Qprime.eq(Q))
+      return i;
+  }
+  throw new Error('Unable to find valid recovery factor');
+};
 
-function sha256 (buffer) {
-  return createHash('sha256').update(buffer).digest()
-}
+},{"../../elliptic":39,"./key":47,"./signature":48,"bn.js":33}],47:[function(require,module,exports){
+'use strict';
 
-// FIXME: Name not consistent with others
-var createHmac = require('create-hmac')
+var BN = require('bn.js');
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
+var assert = utils.assert;
 
-function HmacSHA256 (buffer, secret) {
-  console.warn('Hmac* functions are deprecated for removal in 2.0.0, use node crypto instead')
-  return createHmac('sha256', secret).update(buffer).digest()
-}
+function KeyPair(ec, options) {
+  this.ec = ec;
+  this.priv = null;
+  this.pub = null;
 
-function HmacSHA512 (buffer, secret) {
-  console.warn('Hmac* functions are deprecated for removal in 2.0.0, use node crypto instead')
-  return createHmac('sha512', secret).update(buffer).digest()
+  // KeyPair(ec, { priv: ..., pub: ... })
+  if (options.priv)
+    this._importPrivate(options.priv, options.privEnc);
+  if (options.pub)
+    this._importPublic(options.pub, options.pubEnc);
 }
+module.exports = KeyPair;
 
-module.exports = {
-  ripemd160: ripemd160,
-  sha1: sha1,
-  sha256: sha256,
-  hash160: hash160,
-  hash256: hash256,
-  HmacSHA256: HmacSHA256,
-  HmacSHA512: HmacSHA512
-}
+KeyPair.fromPublic = function fromPublic(ec, pub, enc) {
+  if (pub instanceof KeyPair)
+    return pub;
 
-},{"create-hash":32,"create-hmac":45}],59:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var createHmac = require('create-hmac')
-var typeForce = require('typeforce')
+  return new KeyPair(ec, {
+    pub: pub,
+    pubEnc: enc
+  });
+};
 
-var BigInteger = require('bigi')
-var ECSignature = require('./ecsignature')
+KeyPair.fromPrivate = function fromPrivate(ec, priv, enc) {
+  if (priv instanceof KeyPair)
+    return priv;
 
-var ZERO = new Buffer([0])
-var ONE = new Buffer([1])
+  return new KeyPair(ec, {
+    priv: priv,
+    privEnc: enc
+  });
+};
 
-// https://tools.ietf.org/html/rfc6979#section-3.2
-function deterministicGenerateK (curve, hash, d, checkSig) {
-  typeForce('Buffer', hash)
-  typeForce('BigInteger', d)
+KeyPair.prototype.validate = function validate() {
+  var pub = this.getPublic();
 
-  // FIXME: remove/uncomment for 2.0.0
-  //  typeForce('Function', checkSig)
+  if (pub.isInfinity())
+    return { result: false, reason: 'Invalid public key' };
+  if (!pub.validate())
+    return { result: false, reason: 'Public key is not a point' };
+  if (!pub.mul(this.ec.curve.n).isInfinity())
+    return { result: false, reason: 'Public key * N != O' };
 
-  if (typeof checkSig !== 'function') {
-    console.warn('deterministicGenerateK requires a checkSig callback in 2.0.0, see #337 for more information')
+  return { result: true, reason: null };
+};
 
-    checkSig = function (k) {
-      var G = curve.G
-      var n = curve.n
-      var e = BigInteger.fromBuffer(hash)
+KeyPair.prototype.getPublic = function getPublic(compact, enc) {
+  // compact is optional argument
+  if (typeof compact === 'string') {
+    enc = compact;
+    compact = null;
+  }
 
-      var Q = G.multiply(k)
+  if (!this.pub)
+    this.pub = this.ec.g.mul(this.priv);
 
-      if (curve.isInfinity(Q))
-        return false
+  if (!enc)
+    return this.pub;
 
-      var r = Q.affineX.mod(n)
-      if (r.signum() === 0)
-        return false
+  return this.pub.encode(enc, compact);
+};
 
-      var s = k.modInverse(n).multiply(e.add(d.multiply(r))).mod(n)
-      if (s.signum() === 0)
-        return false
+KeyPair.prototype.getPrivate = function getPrivate(enc) {
+  if (enc === 'hex')
+    return this.priv.toString(16, 2);
+  else
+    return this.priv;
+};
 
-      return true
-    }
-  }
+KeyPair.prototype._importPrivate = function _importPrivate(key, enc) {
+  this.priv = new BN(key, enc || 16);
 
-  // sanity check
-  assert.equal(hash.length, 32, 'Hash must be 256 bit')
+  // Ensure that the priv won't be bigger than n, otherwise we may fail
+  // in fixed multiplication method
+  this.priv = this.priv.umod(this.ec.curve.n);
+};
 
-  var x = d.toBuffer(32)
-  var k = new Buffer(32)
-  var v = new Buffer(32)
+KeyPair.prototype._importPublic = function _importPublic(key, enc) {
+  if (key.x || key.y) {
+    // Montgomery points only have an `x` coordinate.
+    // Weierstrass/Edwards points on the other hand have both `x` and
+    // `y` coordinates.
+    if (this.ec.curve.type === 'mont') {
+      assert(key.x, 'Need x coordinate');
+    } else if (this.ec.curve.type === 'short' ||
+               this.ec.curve.type === 'edwards') {
+      assert(key.x && key.y, 'Need both x and y coordinate');
+    }
+    this.pub = this.ec.curve.point(key.x, key.y);
+    return;
+  }
+  this.pub = this.ec.curve.decodePoint(key, enc);
+};
 
-  // Step A, ignored as hash already provided
-  // Step B
-  v.fill(1)
+// ECDH
+KeyPair.prototype.derive = function derive(pub) {
+  return pub.mul(this.priv).getX();
+};
 
-  // Step C
-  k.fill(0)
+// ECDSA
+KeyPair.prototype.sign = function sign(msg, enc, options) {
+  return this.ec.sign(msg, this, enc, options);
+};
 
-  // Step D
-  k = createHmac('sha256', k)
-    .update(v)
-    .update(ZERO)
-    .update(x)
-    .update(hash)
-    .digest()
+KeyPair.prototype.verify = function verify(msg, signature) {
+  return this.ec.verify(msg, signature, this);
+};
 
-  // Step E
-  v = createHmac('sha256', k).update(v).digest()
+KeyPair.prototype.inspect = function inspect() {
+  return '<Key priv: ' + (this.priv && this.priv.toString(16, 2)) +
+         ' pub: ' + (this.pub && this.pub.inspect()) + ' >';
+};
 
-  // Step F
-  k = createHmac('sha256', k)
-    .update(v)
-    .update(ONE)
-    .update(x)
-    .update(hash)
-    .digest()
+},{"../../elliptic":39,"bn.js":33}],48:[function(require,module,exports){
+'use strict';
 
-  // Step G
-  v = createHmac('sha256', k).update(v).digest()
+var BN = require('bn.js');
 
-  // Step H1/H2a, ignored as tlen === qlen (256 bit)
-  // Step H2b
-  v = createHmac('sha256', k).update(v).digest()
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
+var assert = utils.assert;
 
-  var T = BigInteger.fromBuffer(v)
+function Signature(options, enc) {
+  if (options instanceof Signature)
+    return options;
 
-  // Step H3, repeat until T is within the interval [1, n - 1] and is suitable for ECDSA
-  while ((T.signum() <= 0) || (T.compareTo(curve.n) >= 0) || !checkSig(T)) {
-    k = createHmac('sha256', k)
-      .update(v)
-      .update(ZERO)
-      .digest()
+  if (this._importDER(options, enc))
+    return;
 
-    v = createHmac('sha256', k).update(v).digest()
+  assert(options.r && options.s, 'Signature without r or s');
+  this.r = new BN(options.r, 16);
+  this.s = new BN(options.s, 16);
+  if (options.recoveryParam === undefined)
+    this.recoveryParam = null;
+  else
+    this.recoveryParam = options.recoveryParam;
+}
+module.exports = Signature;
 
-    // Step H1/H2a, again, ignored as tlen === qlen (256 bit)
-    // Step H2b again
-    v = createHmac('sha256', k).update(v).digest()
-    T = BigInteger.fromBuffer(v)
+function Position() {
+  this.place = 0;
+}
+
+function getLength(buf, p) {
+  var initial = buf[p.place++];
+  if (!(initial & 0x80)) {
+    return initial;
+  }
+  var octetLen = initial & 0xf;
+  var val = 0;
+  for (var i = 0, off = p.place; i < octetLen; i++, off++) {
+    val <<= 8;
+    val |= buf[off];
   }
+  p.place = off;
+  return val;
+}
 
-  return T
+function rmPadding(buf) {
+  var i = 0;
+  var len = buf.length - 1;
+  while (!buf[i] && !(buf[i + 1] & 0x80) && i < len) {
+    i++;
+  }
+  if (i === 0) {
+    return buf;
+  }
+  return buf.slice(i);
 }
 
-function sign (curve, hash, d) {
-  var r, s
+Signature.prototype._importDER = function _importDER(data, enc) {
+  data = utils.toArray(data, enc);
+  var p = new Position();
+  if (data[p.place++] !== 0x30) {
+    return false;
+  }
+  var len = getLength(data, p);
+  if ((len + p.place) !== data.length) {
+    return false;
+  }
+  if (data[p.place++] !== 0x02) {
+    return false;
+  }
+  var rlen = getLength(data, p);
+  var r = data.slice(p.place, rlen + p.place);
+  p.place += rlen;
+  if (data[p.place++] !== 0x02) {
+    return false;
+  }
+  var slen = getLength(data, p);
+  if (data.length !== slen + p.place) {
+    return false;
+  }
+  var s = data.slice(p.place, slen + p.place);
+  if (r[0] === 0 && (r[1] & 0x80)) {
+    r = r.slice(1);
+  }
+  if (s[0] === 0 && (s[1] & 0x80)) {
+    s = s.slice(1);
+  }
 
-  var e = BigInteger.fromBuffer(hash)
-  var n = curve.n
-  var G = curve.G
+  this.r = new BN(r);
+  this.s = new BN(s);
+  this.recoveryParam = null;
 
-  deterministicGenerateK(curve, hash, d, function (k) {
-    var Q = G.multiply(k)
+  return true;
+};
 
-    if (curve.isInfinity(Q))
-      return false
+function constructLength(arr, len) {
+  if (len < 0x80) {
+    arr.push(len);
+    return;
+  }
+  var octets = 1 + (Math.log(len) / Math.LN2 >>> 3);
+  arr.push(octets | 0x80);
+  while (--octets) {
+    arr.push((len >>> (octets << 3)) & 0xff);
+  }
+  arr.push(len);
+}
+
+Signature.prototype.toDER = function toDER(enc) {
+  var r = this.r.toArray();
+  var s = this.s.toArray();
+
+  // Pad values
+  if (r[0] & 0x80)
+    r = [ 0 ].concat(r);
+  // Pad values
+  if (s[0] & 0x80)
+    s = [ 0 ].concat(s);
+
+  r = rmPadding(r);
+  s = rmPadding(s);
+
+  while (!s[0] && !(s[1] & 0x80)) {
+    s = s.slice(1);
+  }
+  var arr = [ 0x02 ];
+  constructLength(arr, r.length);
+  arr = arr.concat(r);
+  arr.push(0x02);
+  constructLength(arr, s.length);
+  var backHalf = arr.concat(s);
+  var res = [ 0x30 ];
+  constructLength(res, backHalf.length);
+  res = res.concat(backHalf);
+  return utils.encode(res, enc);
+};
 
-    r = Q.affineX.mod(n)
-    if (r.signum() === 0)
-      return false
+},{"../../elliptic":39,"bn.js":33}],49:[function(require,module,exports){
+'use strict';
 
-    s = k.modInverse(n).multiply(e.add(d.multiply(r))).mod(n)
-    if (s.signum() === 0)
-      return false
+var hash = require('hash.js');
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
+var assert = utils.assert;
+var parseBytes = utils.parseBytes;
+var KeyPair = require('./key');
+var Signature = require('./signature');
 
-    return true
-  })
+function EDDSA(curve) {
+  assert(curve === 'ed25519', 'only tested with ed25519 so far');
 
-  var N_OVER_TWO = n.shiftRight(1)
+  if (!(this instanceof EDDSA))
+    return new EDDSA(curve);
 
-  // enforce low S values, see bip62: 'low s values in signatures'
-  if (s.compareTo(N_OVER_TWO) > 0) {
-    s = n.subtract(s)
-  }
+  var curve = elliptic.curves[curve].curve;
+  this.curve = curve;
+  this.g = curve.g;
+  this.g.precompute(curve.n.bitLength() + 1);
 
-  return new ECSignature(r, s)
+  this.pointClass = curve.point().constructor;
+  this.encodingLength = Math.ceil(curve.n.bitLength() / 8);
+  this.hash = hash.sha512;
 }
 
-function verifyRaw (curve, e, signature, Q) {
-  var n = curve.n
-  var G = curve.G
+module.exports = EDDSA;
 
-  var r = signature.r
-  var s = signature.s
+/**
+* @param {Array|String} message - message bytes
+* @param {Array|String|KeyPair} secret - secret bytes or a keypair
+* @returns {Signature} - signature
+*/
+EDDSA.prototype.sign = function sign(message, secret) {
+  message = parseBytes(message);
+  var key = this.keyFromSecret(secret);
+  var r = this.hashInt(key.messagePrefix(), message);
+  var R = this.g.mul(r);
+  var Rencoded = this.encodePoint(R);
+  var s_ = this.hashInt(Rencoded, key.pubBytes(), message)
+               .mul(key.priv());
+  var S = r.add(s_).umod(this.curve.n);
+  return this.makeSignature({ R: R, S: S, Rencoded: Rencoded });
+};
 
-  // 1.4.1 Enforce r and s are both integers in the interval [1, n − 1]
-  if (r.signum() <= 0 || r.compareTo(n) >= 0) return false
-  if (s.signum() <= 0 || s.compareTo(n) >= 0) return false
+/**
+* @param {Array} message - message bytes
+* @param {Array|String|Signature} sig - sig bytes
+* @param {Array|String|Point|KeyPair} pub - public key
+* @returns {Boolean} - true if public key matches sig of message
+*/
+EDDSA.prototype.verify = function verify(message, sig, pub) {
+  message = parseBytes(message);
+  sig = this.makeSignature(sig);
+  var key = this.keyFromPublic(pub);
+  var h = this.hashInt(sig.Rencoded(), key.pubBytes(), message);
+  var SG = this.g.mul(sig.S());
+  var RplusAh = sig.R().add(key.pub().mul(h));
+  return RplusAh.eq(SG);
+};
 
-  // c = s^-1 mod n
-  var c = s.modInverse(n)
+EDDSA.prototype.hashInt = function hashInt() {
+  var hash = this.hash();
+  for (var i = 0; i < arguments.length; i++)
+    hash.update(arguments[i]);
+  return utils.intFromLE(hash.digest()).umod(this.curve.n);
+};
 
-  // 1.4.4 Compute u1 = es^−1 mod n
-  //               u2 = rs^−1 mod n
-  var u1 = e.multiply(c).mod(n)
-  var u2 = r.multiply(c).mod(n)
+EDDSA.prototype.keyFromPublic = function keyFromPublic(pub) {
+  return KeyPair.fromPublic(this, pub);
+};
 
-  // 1.4.5 Compute R = (xR, yR) = u1G + u2Q
-  var R = G.multiplyTwo(u1, Q, u2)
-  var v = R.affineX.mod(n)
+EDDSA.prototype.keyFromSecret = function keyFromSecret(secret) {
+  return KeyPair.fromSecret(this, secret);
+};
 
-  // 1.4.5 (cont.) Enforce R is not at infinity
-  if (curve.isInfinity(R)) return false
+EDDSA.prototype.makeSignature = function makeSignature(sig) {
+  if (sig instanceof Signature)
+    return sig;
+  return new Signature(this, sig);
+};
 
-  // 1.4.8 If v = r, output "valid", and if v != r, output "invalid"
-  return v.equals(r)
-}
+/**
+* * https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-03#section-5.2
+*
+* EDDSA defines methods for encoding and decoding points and integers. These are
+* helper convenience methods, that pass along to utility functions implied
+* parameters.
+*
+*/
+EDDSA.prototype.encodePoint = function encodePoint(point) {
+  var enc = point.getY().toArray('le', this.encodingLength);
+  enc[this.encodingLength - 1] |= point.getX().isOdd() ? 0x80 : 0;
+  return enc;
+};
 
-function verify (curve, hash, signature, Q) {
-  // 1.4.2 H = Hash(M), already done by the user
-  // 1.4.3 e = H
-  var e = BigInteger.fromBuffer(hash)
+EDDSA.prototype.decodePoint = function decodePoint(bytes) {
+  bytes = utils.parseBytes(bytes);
 
-  return verifyRaw(curve, e, signature, Q)
-}
+  var lastIx = bytes.length - 1;
+  var normed = bytes.slice(0, lastIx).concat(bytes[lastIx] & ~0x80);
+  var xIsOdd = (bytes[lastIx] & 0x80) !== 0;
+
+  var y = utils.intFromLE(normed);
+  return this.curve.pointFromY(y, xIsOdd);
+};
+
+EDDSA.prototype.encodeInt = function encodeInt(num) {
+  return num.toArray('le', this.encodingLength);
+};
+
+EDDSA.prototype.decodeInt = function decodeInt(bytes) {
+  return utils.intFromLE(bytes);
+};
+
+EDDSA.prototype.isPoint = function isPoint(val) {
+  return val instanceof this.pointClass;
+};
+
+},{"../../elliptic":39,"./key":50,"./signature":51,"hash.js":57}],50:[function(require,module,exports){
+'use strict';
+
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
+var assert = utils.assert;
+var parseBytes = utils.parseBytes;
+var cachedProperty = utils.cachedProperty;
 
 /**
-  * Recover a public key from a signature.
-  *
-  * See SEC 1: Elliptic Curve Cryptography, section 4.1.6, "Public
-  * Key Recovery Operation".
-  *
-  * http://www.secg.org/download/aid-780/sec1-v2.pdf
-  */
-function recoverPubKey (curve, e, signature, i) {
-  assert.strictEqual(i & 3, i, 'Recovery param is more than two bits')
+* @param {EDDSA} eddsa - instance
+* @param {Object} params - public/private key parameters
+*
+* @param {Array<Byte>} [params.secret] - secret seed bytes
+* @param {Point} [params.pub] - public key point (aka `A` in eddsa terms)
+* @param {Array<Byte>} [params.pub] - public key point encoded as bytes
+*
+*/
+function KeyPair(eddsa, params) {
+  this.eddsa = eddsa;
+  this._secret = parseBytes(params.secret);
+  if (eddsa.isPoint(params.pub))
+    this._pub = params.pub;
+  else
+    this._pubBytes = parseBytes(params.pub);
+}
+
+KeyPair.fromPublic = function fromPublic(eddsa, pub) {
+  if (pub instanceof KeyPair)
+    return pub;
+  return new KeyPair(eddsa, { pub: pub });
+};
+
+KeyPair.fromSecret = function fromSecret(eddsa, secret) {
+  if (secret instanceof KeyPair)
+    return secret;
+  return new KeyPair(eddsa, { secret: secret });
+};
+
+KeyPair.prototype.secret = function secret() {
+  return this._secret;
+};
+
+cachedProperty(KeyPair, 'pubBytes', function pubBytes() {
+  return this.eddsa.encodePoint(this.pub());
+});
+
+cachedProperty(KeyPair, 'pub', function pub() {
+  if (this._pubBytes)
+    return this.eddsa.decodePoint(this._pubBytes);
+  return this.eddsa.g.mul(this.priv());
+});
 
-  var n = curve.n
-  var G = curve.G
+cachedProperty(KeyPair, 'privBytes', function privBytes() {
+  var eddsa = this.eddsa;
+  var hash = this.hash();
+  var lastIx = eddsa.encodingLength - 1;
 
-  var r = signature.r
-  var s = signature.s
+  var a = hash.slice(0, eddsa.encodingLength);
+  a[0] &= 248;
+  a[lastIx] &= 127;
+  a[lastIx] |= 64;
 
-  assert(r.signum() > 0 && r.compareTo(n) < 0, 'Invalid r value')
-  assert(s.signum() > 0 && s.compareTo(n) < 0, 'Invalid s value')
+  return a;
+});
 
-  // A set LSB signifies that the y-coordinate is odd
-  var isYOdd = i & 1
+cachedProperty(KeyPair, 'priv', function priv() {
+  return this.eddsa.decodeInt(this.privBytes());
+});
 
-  // The more significant bit specifies whether we should use the
-  // first or second candidate key.
-  var isSecondKey = i >> 1
+cachedProperty(KeyPair, 'hash', function hash() {
+  return this.eddsa.hash().update(this.secret()).digest();
+});
 
-  // 1.1 Let x = r + jn
-  var x = isSecondKey ? r.add(n) : r
-  var R = curve.pointFromX(isYOdd, x)
+cachedProperty(KeyPair, 'messagePrefix', function messagePrefix() {
+  return this.hash().slice(this.eddsa.encodingLength);
+});
 
-  // 1.4 Check that nR is at infinity
-  var nR = R.multiply(n)
-  assert(curve.isInfinity(nR), 'nR is not a valid curve point')
+KeyPair.prototype.sign = function sign(message) {
+  assert(this._secret, 'KeyPair can only verify');
+  return this.eddsa.sign(message, this);
+};
 
-  // Compute -e from e
-  var eNeg = e.negate().mod(n)
+KeyPair.prototype.verify = function verify(message, sig) {
+  return this.eddsa.verify(message, sig, this);
+};
 
-  // 1.6.1 Compute Q = r^-1 (sR -  eG)
-  //               Q = r^-1 (sR + -eG)
-  var rInv = r.modInverse(n)
+KeyPair.prototype.getSecret = function getSecret(enc) {
+  assert(this._secret, 'KeyPair is public only');
+  return utils.encode(this.secret(), enc);
+};
 
-  var Q = R.multiplyTwo(s, G, eNeg).multiply(rInv)
-  curve.validate(Q)
+KeyPair.prototype.getPublic = function getPublic(enc) {
+  return utils.encode(this.pubBytes(), enc);
+};
 
-  return Q
-}
+module.exports = KeyPair;
+
+},{"../../elliptic":39}],51:[function(require,module,exports){
+'use strict';
+
+var BN = require('bn.js');
+var elliptic = require('../../elliptic');
+var utils = elliptic.utils;
+var assert = utils.assert;
+var cachedProperty = utils.cachedProperty;
+var parseBytes = utils.parseBytes;
 
 /**
-  * Calculate pubkey extraction parameter.
-  *
-  * When extracting a pubkey from a signature, we have to
-  * distinguish four different cases. Rather than putting this
-  * burden on the verifier, Bitcoin includes a 2-bit value with the
-  * signature.
-  *
-  * This function simply tries all four cases and returns the value
-  * that resulted in a successful pubkey recovery.
-  */
-function calcPubKeyRecoveryParam (curve, e, signature, Q) {
-  for (var i = 0; i < 4; i++) {
-    var Qprime = recoverPubKey(curve, e, signature, i)
+* @param {EDDSA} eddsa - eddsa instance
+* @param {Array<Bytes>|Object} sig -
+* @param {Array<Bytes>|Point} [sig.R] - R point as Point or bytes
+* @param {Array<Bytes>|bn} [sig.S] - S scalar as bn or bytes
+* @param {Array<Bytes>} [sig.Rencoded] - R point encoded
+* @param {Array<Bytes>} [sig.Sencoded] - S scalar encoded
+*/
+function Signature(eddsa, sig) {
+  this.eddsa = eddsa;
 
-    // 1.6.2 Verify Q
-    if (Qprime.equals(Q)) {
-      return i
-    }
+  if (typeof sig !== 'object')
+    sig = parseBytes(sig);
+
+  if (Array.isArray(sig)) {
+    sig = {
+      R: sig.slice(0, eddsa.encodingLength),
+      S: sig.slice(eddsa.encodingLength)
+    };
   }
 
-  throw new Error('Unable to find valid recovery factor')
-}
+  assert(sig.R && sig.S, 'Signature without R or S');
 
-module.exports = {
-  calcPubKeyRecoveryParam: calcPubKeyRecoveryParam,
-  deterministicGenerateK: deterministicGenerateK,
-  recoverPubKey: recoverPubKey,
-  sign: sign,
-  verify: verify,
-  verifyRaw: verifyRaw
+  if (eddsa.isPoint(sig.R))
+    this._R = sig.R;
+  if (sig.S instanceof BN)
+    this._S = sig.S;
+
+  this._Rencoded = Array.isArray(sig.R) ? sig.R : sig.Rencoded;
+  this._Sencoded = Array.isArray(sig.S) ? sig.S : sig.Sencoded;
 }
 
-}).call(this,require("buffer").Buffer)
-},{"./ecsignature":62,"assert":5,"bigi":3,"buffer":7,"create-hmac":45,"typeforce":53}],60:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var base58check = require('bs58check')
-var ecdsa = require('./ecdsa')
-var networks = require('./networks')
-var randomBytes = require('randombytes')
-var typeForce = require('typeforce')
+cachedProperty(Signature, 'S', function S() {
+  return this.eddsa.decodeInt(this.Sencoded());
+});
 
-var BigInteger = require('bigi')
-var ECPubKey = require('./ecpubkey')
+cachedProperty(Signature, 'R', function R() {
+  return this.eddsa.decodePoint(this.Rencoded());
+});
 
-var ecurve = require('ecurve')
-var secp256k1 = ecurve.getCurveByName('secp256k1')
+cachedProperty(Signature, 'Rencoded', function Rencoded() {
+  return this.eddsa.encodePoint(this.R());
+});
 
-function ECKey (d, compressed) {
-  assert(d.signum() > 0, 'Private key must be greater than 0')
-  assert(d.compareTo(ECKey.curve.n) < 0, 'Private key must be less than the curve order')
+cachedProperty(Signature, 'Sencoded', function Sencoded() {
+  return this.eddsa.encodeInt(this.S());
+});
 
-  var Q = ECKey.curve.G.multiply(d)
+Signature.prototype.toBytes = function toBytes() {
+  return this.Rencoded().concat(this.Sencoded());
+};
 
-  this.d = d
-  this.pub = new ECPubKey(Q, compressed)
-}
+Signature.prototype.toHex = function toHex() {
+  return utils.encode(this.toBytes(), 'hex').toUpperCase();
+};
 
-// Constants
-ECKey.curve = secp256k1
+module.exports = Signature;
 
-// Static constructors
-ECKey.fromWIF = function (string) {
-  var payload = base58check.decode(string)
-  var compressed = false
+},{"../../elliptic":39,"bn.js":33}],52:[function(require,module,exports){
+'use strict';
 
-  // Ignore the version byte
-  payload = payload.slice(1)
+var hash = require('hash.js');
+var elliptic = require('../elliptic');
+var utils = elliptic.utils;
+var assert = utils.assert;
 
-  if (payload.length === 33) {
-    assert.strictEqual(payload[32], 0x01, 'Invalid compression flag')
+function HmacDRBG(options) {
+  if (!(this instanceof HmacDRBG))
+    return new HmacDRBG(options);
+  this.hash = options.hash;
+  this.predResist = !!options.predResist;
 
-    // Truncate the compression flag
-    payload = payload.slice(0, -1)
-    compressed = true
-  }
+  this.outLen = this.hash.outSize;
+  this.minEntropy = options.minEntropy || this.hash.hmacStrength;
 
-  assert.equal(payload.length, 32, 'Invalid WIF payload length')
+  this.reseed = null;
+  this.reseedInterval = null;
+  this.K = null;
+  this.V = null;
 
-  var d = BigInteger.fromBuffer(payload)
-  return new ECKey(d, compressed)
+  var entropy = utils.toArray(options.entropy, options.entropyEnc);
+  var nonce = utils.toArray(options.nonce, options.nonceEnc);
+  var pers = utils.toArray(options.pers, options.persEnc);
+  assert(entropy.length >= (this.minEntropy / 8),
+         'Not enough entropy. Minimum is: ' + this.minEntropy + ' bits');
+  this._init(entropy, nonce, pers);
 }
+module.exports = HmacDRBG;
 
-ECKey.makeRandom = function (compressed, rng) {
-  rng = rng || randomBytes
-
-  var buffer = rng(32)
-  typeForce('Buffer', buffer)
-  assert.equal(buffer.length, 32, 'Expected 256-bit Buffer from RNG')
+HmacDRBG.prototype._init = function init(entropy, nonce, pers) {
+  var seed = entropy.concat(nonce).concat(pers);
 
-  var d = BigInteger.fromBuffer(buffer)
-  d = d.mod(ECKey.curve.n)
+  this.K = new Array(this.outLen / 8);
+  this.V = new Array(this.outLen / 8);
+  for (var i = 0; i < this.V.length; i++) {
+    this.K[i] = 0x00;
+    this.V[i] = 0x01;
+  }
 
-  return new ECKey(d, compressed)
-}
+  this._update(seed);
+  this.reseed = 1;
+  this.reseedInterval = 0x1000000000000;  // 2^48
+};
 
-// Export functions
-ECKey.prototype.toWIF = function (network) {
-  network = network || networks.bitcoin
+HmacDRBG.prototype._hmac = function hmac() {
+  return new hash.hmac(this.hash, this.K);
+};
 
-  var bufferLen = this.pub.compressed ? 34 : 33
-  var buffer = new Buffer(bufferLen)
+HmacDRBG.prototype._update = function update(seed) {
+  var kmac = this._hmac()
+                 .update(this.V)
+                 .update([ 0x00 ]);
+  if (seed)
+    kmac = kmac.update(seed);
+  this.K = kmac.digest();
+  this.V = this._hmac().update(this.V).digest();
+  if (!seed)
+    return;
 
-  buffer.writeUInt8(network.wif, 0)
-  this.d.toBuffer(32).copy(buffer, 1)
+  this.K = this._hmac()
+               .update(this.V)
+               .update([ 0x01 ])
+               .update(seed)
+               .digest();
+  this.V = this._hmac().update(this.V).digest();
+};
 
-  if (this.pub.compressed) {
-    buffer.writeUInt8(0x01, 33)
+HmacDRBG.prototype.reseed = function reseed(entropy, entropyEnc, add, addEnc) {
+  // Optional entropy enc
+  if (typeof entropyEnc !== 'string') {
+    addEnc = add;
+    add = entropyEnc;
+    entropyEnc = null;
   }
 
-  return base58check.encode(buffer)
-}
-
-// Operations
-ECKey.prototype.sign = function (hash) {
-  return ecdsa.sign(ECKey.curve, hash, this.d)
-}
-
-module.exports = ECKey
+  entropy = utils.toBuffer(entropy, entropyEnc);
+  add = utils.toBuffer(add, addEnc);
 
-}).call(this,require("buffer").Buffer)
-},{"./ecdsa":59,"./ecpubkey":61,"./networks":66,"assert":5,"bigi":3,"bs58check":31,"buffer":7,"ecurve":49,"randombytes":52,"typeforce":53}],61:[function(require,module,exports){
-(function (Buffer){
-var crypto = require('./crypto')
-var ecdsa = require('./ecdsa')
-var typeForce = require('typeforce')
-var networks = require('./networks')
+  assert(entropy.length >= (this.minEntropy / 8),
+         'Not enough entropy. Minimum is: ' + this.minEntropy + ' bits');
 
-var Address = require('./address')
+  this._update(entropy.concat(add || []));
+  this.reseed = 1;
+};
 
-var ecurve = require('ecurve')
-var secp256k1 = ecurve.getCurveByName('secp256k1')
+HmacDRBG.prototype.generate = function generate(len, enc, add, addEnc) {
+  if (this.reseed > this.reseedInterval)
+    throw new Error('Reseed is required');
 
-function ECPubKey (Q, compressed) {
-  if (compressed === undefined) {
-    compressed = true
+  // Optional encoding
+  if (typeof enc !== 'string') {
+    addEnc = add;
+    add = enc;
+    enc = null;
   }
 
-  typeForce('Point', Q)
-  typeForce('Boolean', compressed)
+  // Optional additional data
+  if (add) {
+    add = utils.toArray(add, addEnc);
+    this._update(add);
+  }
 
-  this.compressed = compressed
-  this.Q = Q
-}
+  var temp = [];
+  while (temp.length < len) {
+    this.V = this._hmac().update(this.V).digest();
+    temp = temp.concat(this.V);
+  }
 
-// Constants
-ECPubKey.curve = secp256k1
+  var res = temp.slice(0, len);
+  this._update(add);
+  this.reseed++;
+  return utils.encode(res, enc);
+};
 
-// Static constructors
-ECPubKey.fromBuffer = function (buffer) {
-  var Q = ecurve.Point.decodeFrom(ECPubKey.curve, buffer)
-  return new ECPubKey(Q, Q.compressed)
-}
+},{"../elliptic":39,"hash.js":57}],53:[function(require,module,exports){
+module.exports = {
+  doubles: {
+    step: 4,
+    points: [
+      [
+        'e60fce93b59e9ec53011aabc21c23e97b2a31369b87a5ae9c44ee89e2a6dec0a',
+        'f7e3507399e595929db99f34f57937101296891e44d23f0be1f32cce69616821'
+      ],
+      [
+        '8282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508',
+        '11f8a8098557dfe45e8256e830b60ace62d613ac2f7b17bed31b6eaff6e26caf'
+      ],
+      [
+        '175e159f728b865a72f99cc6c6fc846de0b93833fd2222ed73fce5b551e5b739',
+        'd3506e0d9e3c79eba4ef97a51ff71f5eacb5955add24345c6efa6ffee9fed695'
+      ],
+      [
+        '363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640',
+        '4e273adfc732221953b445397f3363145b9a89008199ecb62003c7f3bee9de9'
+      ],
+      [
+        '8b4b5f165df3c2be8c6244b5b745638843e4a781a15bcd1b69f79a55dffdf80c',
+        '4aad0a6f68d308b4b3fbd7813ab0da04f9e336546162ee56b3eff0c65fd4fd36'
+      ],
+      [
+        '723cbaa6e5db996d6bf771c00bd548c7b700dbffa6c0e77bcb6115925232fcda',
+        '96e867b5595cc498a921137488824d6e2660a0653779494801dc069d9eb39f5f'
+      ],
+      [
+        'eebfa4d493bebf98ba5feec812c2d3b50947961237a919839a533eca0e7dd7fa',
+        '5d9a8ca3970ef0f269ee7edaf178089d9ae4cdc3a711f712ddfd4fdae1de8999'
+      ],
+      [
+        '100f44da696e71672791d0a09b7bde459f1215a29b3c03bfefd7835b39a48db0',
+        'cdd9e13192a00b772ec8f3300c090666b7ff4a18ff5195ac0fbd5cd62bc65a09'
+      ],
+      [
+        'e1031be262c7ed1b1dc9227a4a04c017a77f8d4464f3b3852c8acde6e534fd2d',
+        '9d7061928940405e6bb6a4176597535af292dd419e1ced79a44f18f29456a00d'
+      ],
+      [
+        'feea6cae46d55b530ac2839f143bd7ec5cf8b266a41d6af52d5e688d9094696d',
+        'e57c6b6c97dce1bab06e4e12bf3ecd5c981c8957cc41442d3155debf18090088'
+      ],
+      [
+        'da67a91d91049cdcb367be4be6ffca3cfeed657d808583de33fa978bc1ec6cb1',
+        '9bacaa35481642bc41f463f7ec9780e5dec7adc508f740a17e9ea8e27a68be1d'
+      ],
+      [
+        '53904faa0b334cdda6e000935ef22151ec08d0f7bb11069f57545ccc1a37b7c0',
+        '5bc087d0bc80106d88c9eccac20d3c1c13999981e14434699dcb096b022771c8'
+      ],
+      [
+        '8e7bcd0bd35983a7719cca7764ca906779b53a043a9b8bcaeff959f43ad86047',
+        '10b7770b2a3da4b3940310420ca9514579e88e2e47fd68b3ea10047e8460372a'
+      ],
+      [
+        '385eed34c1cdff21e6d0818689b81bde71a7f4f18397e6690a841e1599c43862',
+        '283bebc3e8ea23f56701de19e9ebf4576b304eec2086dc8cc0458fe5542e5453'
+      ],
+      [
+        '6f9d9b803ecf191637c73a4413dfa180fddf84a5947fbc9c606ed86c3fac3a7',
+        '7c80c68e603059ba69b8e2a30e45c4d47ea4dd2f5c281002d86890603a842160'
+      ],
+      [
+        '3322d401243c4e2582a2147c104d6ecbf774d163db0f5e5313b7e0e742d0e6bd',
+        '56e70797e9664ef5bfb019bc4ddaf9b72805f63ea2873af624f3a2e96c28b2a0'
+      ],
+      [
+        '85672c7d2de0b7da2bd1770d89665868741b3f9af7643397721d74d28134ab83',
+        '7c481b9b5b43b2eb6374049bfa62c2e5e77f17fcc5298f44c8e3094f790313a6'
+      ],
+      [
+        '948bf809b1988a46b06c9f1919413b10f9226c60f668832ffd959af60c82a0a',
+        '53a562856dcb6646dc6b74c5d1c3418c6d4dff08c97cd2bed4cb7f88d8c8e589'
+      ],
+      [
+        '6260ce7f461801c34f067ce0f02873a8f1b0e44dfc69752accecd819f38fd8e8',
+        'bc2da82b6fa5b571a7f09049776a1ef7ecd292238051c198c1a84e95b2b4ae17'
+      ],
+      [
+        'e5037de0afc1d8d43d8348414bbf4103043ec8f575bfdc432953cc8d2037fa2d',
+        '4571534baa94d3b5f9f98d09fb990bddbd5f5b03ec481f10e0e5dc841d755bda'
+      ],
+      [
+        'e06372b0f4a207adf5ea905e8f1771b4e7e8dbd1c6a6c5b725866a0ae4fce725',
+        '7a908974bce18cfe12a27bb2ad5a488cd7484a7787104870b27034f94eee31dd'
+      ],
+      [
+        '213c7a715cd5d45358d0bbf9dc0ce02204b10bdde2a3f58540ad6908d0559754',
+        '4b6dad0b5ae462507013ad06245ba190bb4850f5f36a7eeddff2c27534b458f2'
+      ],
+      [
+        '4e7c272a7af4b34e8dbb9352a5419a87e2838c70adc62cddf0cc3a3b08fbd53c',
+        '17749c766c9d0b18e16fd09f6def681b530b9614bff7dd33e0b3941817dcaae6'
+      ],
+      [
+        'fea74e3dbe778b1b10f238ad61686aa5c76e3db2be43057632427e2840fb27b6',
+        '6e0568db9b0b13297cf674deccb6af93126b596b973f7b77701d3db7f23cb96f'
+      ],
+      [
+        '76e64113f677cf0e10a2570d599968d31544e179b760432952c02a4417bdde39',
+        'c90ddf8dee4e95cf577066d70681f0d35e2a33d2b56d2032b4b1752d1901ac01'
+      ],
+      [
+        'c738c56b03b2abe1e8281baa743f8f9a8f7cc643df26cbee3ab150242bcbb891',
+        '893fb578951ad2537f718f2eacbfbbbb82314eef7880cfe917e735d9699a84c3'
+      ],
+      [
+        'd895626548b65b81e264c7637c972877d1d72e5f3a925014372e9f6588f6c14b',
+        'febfaa38f2bc7eae728ec60818c340eb03428d632bb067e179363ed75d7d991f'
+      ],
+      [
+        'b8da94032a957518eb0f6433571e8761ceffc73693e84edd49150a564f676e03',
+        '2804dfa44805a1e4d7c99cc9762808b092cc584d95ff3b511488e4e74efdf6e7'
+      ],
+      [
+        'e80fea14441fb33a7d8adab9475d7fab2019effb5156a792f1a11778e3c0df5d',
+        'eed1de7f638e00771e89768ca3ca94472d155e80af322ea9fcb4291b6ac9ec78'
+      ],
+      [
+        'a301697bdfcd704313ba48e51d567543f2a182031efd6915ddc07bbcc4e16070',
+        '7370f91cfb67e4f5081809fa25d40f9b1735dbf7c0a11a130c0d1a041e177ea1'
+      ],
+      [
+        '90ad85b389d6b936463f9d0512678de208cc330b11307fffab7ac63e3fb04ed4',
+        'e507a3620a38261affdcbd9427222b839aefabe1582894d991d4d48cb6ef150'
+      ],
+      [
+        '8f68b9d2f63b5f339239c1ad981f162ee88c5678723ea3351b7b444c9ec4c0da',
+        '662a9f2dba063986de1d90c2b6be215dbbea2cfe95510bfdf23cbf79501fff82'
+      ],
+      [
+        'e4f3fb0176af85d65ff99ff9198c36091f48e86503681e3e6686fd5053231e11',
+        '1e63633ad0ef4f1c1661a6d0ea02b7286cc7e74ec951d1c9822c38576feb73bc'
+      ],
+      [
+        '8c00fa9b18ebf331eb961537a45a4266c7034f2f0d4e1d0716fb6eae20eae29e',
+        'efa47267fea521a1a9dc343a3736c974c2fadafa81e36c54e7d2a4c66702414b'
+      ],
+      [
+        'e7a26ce69dd4829f3e10cec0a9e98ed3143d084f308b92c0997fddfc60cb3e41',
+        '2a758e300fa7984b471b006a1aafbb18d0a6b2c0420e83e20e8a9421cf2cfd51'
+      ],
+      [
+        'b6459e0ee3662ec8d23540c223bcbdc571cbcb967d79424f3cf29eb3de6b80ef',
+        '67c876d06f3e06de1dadf16e5661db3c4b3ae6d48e35b2ff30bf0b61a71ba45'
+      ],
+      [
+        'd68a80c8280bb840793234aa118f06231d6f1fc67e73c5a5deda0f5b496943e8',
+        'db8ba9fff4b586d00c4b1f9177b0e28b5b0e7b8f7845295a294c84266b133120'
+      ],
+      [
+        '324aed7df65c804252dc0270907a30b09612aeb973449cea4095980fc28d3d5d',
+        '648a365774b61f2ff130c0c35aec1f4f19213b0c7e332843967224af96ab7c84'
+      ],
+      [
+        '4df9c14919cde61f6d51dfdbe5fee5dceec4143ba8d1ca888e8bd373fd054c96',
+        '35ec51092d8728050974c23a1d85d4b5d506cdc288490192ebac06cad10d5d'
+      ],
+      [
+        '9c3919a84a474870faed8a9c1cc66021523489054d7f0308cbfc99c8ac1f98cd',
+        'ddb84f0f4a4ddd57584f044bf260e641905326f76c64c8e6be7e5e03d4fc599d'
+      ],
+      [
+        '6057170b1dd12fdf8de05f281d8e06bb91e1493a8b91d4cc5a21382120a959e5',
+        '9a1af0b26a6a4807add9a2daf71df262465152bc3ee24c65e899be932385a2a8'
+      ],
+      [
+        'a576df8e23a08411421439a4518da31880cef0fba7d4df12b1a6973eecb94266',
+        '40a6bf20e76640b2c92b97afe58cd82c432e10a7f514d9f3ee8be11ae1b28ec8'
+      ],
+      [
+        '7778a78c28dec3e30a05fe9629de8c38bb30d1f5cf9a3a208f763889be58ad71',
+        '34626d9ab5a5b22ff7098e12f2ff580087b38411ff24ac563b513fc1fd9f43ac'
+      ],
+      [
+        '928955ee637a84463729fd30e7afd2ed5f96274e5ad7e5cb09eda9c06d903ac',
+        'c25621003d3f42a827b78a13093a95eeac3d26efa8a8d83fc5180e935bcd091f'
+      ],
+      [
+        '85d0fef3ec6db109399064f3a0e3b2855645b4a907ad354527aae75163d82751',
+        '1f03648413a38c0be29d496e582cf5663e8751e96877331582c237a24eb1f962'
+      ],
+      [
+        'ff2b0dce97eece97c1c9b6041798b85dfdfb6d8882da20308f5404824526087e',
+        '493d13fef524ba188af4c4dc54d07936c7b7ed6fb90e2ceb2c951e01f0c29907'
+      ],
+      [
+        '827fbbe4b1e880ea9ed2b2e6301b212b57f1ee148cd6dd28780e5e2cf856e241',
+        'c60f9c923c727b0b71bef2c67d1d12687ff7a63186903166d605b68baec293ec'
+      ],
+      [
+        'eaa649f21f51bdbae7be4ae34ce6e5217a58fdce7f47f9aa7f3b58fa2120e2b3',
+        'be3279ed5bbbb03ac69a80f89879aa5a01a6b965f13f7e59d47a5305ba5ad93d'
+      ],
+      [
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+        '4d9f92e716d1c73526fc99ccfb8ad34ce886eedfa8d8e4f13a7f7131deba9414'
+      ],
+      [
+        '1ec80fef360cbdd954160fadab352b6b92b53576a88fea4947173b9d4300bf19',
+        'aeefe93756b5340d2f3a4958a7abbf5e0146e77f6295a07b671cdc1cc107cefd'
+      ],
+      [
+        '146a778c04670c2f91b00af4680dfa8bce3490717d58ba889ddb5928366642be',
+        'b318e0ec3354028add669827f9d4b2870aaa971d2f7e5ed1d0b297483d83efd0'
+      ],
+      [
+        'fa50c0f61d22e5f07e3acebb1aa07b128d0012209a28b9776d76a8793180eef9',
+        '6b84c6922397eba9b72cd2872281a68a5e683293a57a213b38cd8d7d3f4f2811'
+      ],
+      [
+        'da1d61d0ca721a11b1a5bf6b7d88e8421a288ab5d5bba5220e53d32b5f067ec2',
+        '8157f55a7c99306c79c0766161c91e2966a73899d279b48a655fba0f1ad836f1'
+      ],
+      [
+        'a8e282ff0c9706907215ff98e8fd416615311de0446f1e062a73b0610d064e13',
+        '7f97355b8db81c09abfb7f3c5b2515888b679a3e50dd6bd6cef7c73111f4cc0c'
+      ],
+      [
+        '174a53b9c9a285872d39e56e6913cab15d59b1fa512508c022f382de8319497c',
+        'ccc9dc37abfc9c1657b4155f2c47f9e6646b3a1d8cb9854383da13ac079afa73'
+      ],
+      [
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+        '2e7e552888c331dd8ba0386a4b9cd6849c653f64c8709385e9b8abf87524f2fd'
+      ],
+      [
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+        'e82d86fb6443fcb7565aee58b2948220a70f750af484ca52d4142174dcf89405'
+      ],
+      [
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+        'd99fcdd5bf6902e2ae96dd6447c299a185b90a39133aeab358299e5e9faf6589'
+      ],
+      [
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+        '38ee7b8cba5404dd84a25bf39cecb2ca900a79c42b262e556d64b1b59779057e'
+      ],
+      [
+        '13464a57a78102aa62b6979ae817f4637ffcfed3c4b1ce30bcd6303f6caf666b',
+        '69be159004614580ef7e433453ccb0ca48f300a81d0942e13f495a907f6ecc27'
+      ],
+      [
+        'bc4a9df5b713fe2e9aef430bcc1dc97a0cd9ccede2f28588cada3a0d2d83f366',
+        'd3a81ca6e785c06383937adf4b798caa6e8a9fbfa547b16d758d666581f33c1'
+      ],
+      [
+        '8c28a97bf8298bc0d23d8c749452a32e694b65e30a9472a3954ab30fe5324caa',
+        '40a30463a3305193378fedf31f7cc0eb7ae784f0451cb9459e71dc73cbef9482'
+      ],
+      [
+        '8ea9666139527a8c1dd94ce4f071fd23c8b350c5a4bb33748c4ba111faccae0',
+        '620efabbc8ee2782e24e7c0cfb95c5d735b783be9cf0f8e955af34a30e62b945'
+      ],
+      [
+        'dd3625faef5ba06074669716bbd3788d89bdde815959968092f76cc4eb9a9787',
+        '7a188fa3520e30d461da2501045731ca941461982883395937f68d00c644a573'
+      ],
+      [
+        'f710d79d9eb962297e4f6232b40e8f7feb2bc63814614d692c12de752408221e',
+        'ea98e67232d3b3295d3b535532115ccac8612c721851617526ae47a9c77bfc82'
+      ]
+    ]
+  },
+  naf: {
+    wnd: 7,
+    points: [
+      [
+        'f9308a019258c31049344f85f89d5229b531c845836f99b08601f113bce036f9',
+        '388f7b0f632de8140fe337e62a37f3566500a99934c2231b6cb9fd7584b8e672'
+      ],
+      [
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+      ],
+      [
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+        '6aebca40ba255960a3178d6d861a54dba813d0b813fde7b5a5082628087264da'
+      ],
+      [
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+        'cc338921b0a7d9fd64380971763b61e9add888a4375f8e0f05cc262ac64f9c37'
+      ],
+      [
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+      ],
+      [
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+      [
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+      ],
+      [
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+      ],
+      [
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+      ],
+      [
+        'c44d12c7065d812e8acf28d7cbb19f9011ecd9e9fdf281b0e6a3b5e87d22e7db',
+        '2119a460ce326cdc76c45926c982fdac0e106e861edf61c5a039063f0e0e6482'
+      ],
+      [
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+        'ff07f3118a9df035e9fad85eb6c7bfe42b02f01ca99ceea3bf7ffdba93c4750d',
+        '438136d603e858a3a5c440c38eccbaddc1d2942114e2eddd4740d098ced1f0d8'
+      ],
+      [
+        '8d8b9855c7c052a34146fd20ffb658bea4b9f69e0d825ebec16e8c3ce2b526a1',
+        'cdb559eedc2d79f926baf44fb84ea4d44bcf50fee51d7ceb30e2e7f463036758'
+      ],
+      [
+        '52db0b5384dfbf05bfa9d472d7ae26dfe4b851ceca91b1eba54263180da32b63',
+        'c3b997d050ee5d423ebaf66a6db9f57b3180c902875679de924b69d84a7b375'
+      ],
+      [
+        'e62f9490d3d51da6395efd24e80919cc7d0f29c3f3fa48c6fff543becbd43352',
+        '6d89ad7ba4876b0b22c2ca280c682862f342c8591f1daf5170e07bfd9ccafa7d'
+      ],
+      [
+        '7f30ea2476b399b4957509c88f77d0191afa2ff5cb7b14fd6d8e7d65aaab1193',
+        'ca5ef7d4b231c94c3b15389a5f6311e9daff7bb67b103e9880ef4bff637acaec'
+      ],
+      [
+        '5098ff1e1d9f14fb46a210fada6c903fef0fb7b4a1dd1d9ac60a0361800b7a00',
+        '9731141d81fc8f8084d37c6e7542006b3ee1b40d60dfe5362a5b132fd17ddc0'
+      ],
+      [
+        '32b78c7de9ee512a72895be6b9cbefa6e2f3c4ccce445c96b9f2c81e2778ad58',
+        'ee1849f513df71e32efc3896ee28260c73bb80547ae2275ba497237794c8753c'
+      ],
+      [
+        'e2cb74fddc8e9fbcd076eef2a7c72b0ce37d50f08269dfc074b581550547a4f7',
+        'd3aa2ed71c9dd2247a62df062736eb0baddea9e36122d2be8641abcb005cc4a4'
+      ],
+      [
+        '8438447566d4d7bedadc299496ab357426009a35f235cb141be0d99cd10ae3a8',
+        'c4e1020916980a4da5d01ac5e6ad330734ef0d7906631c4f2390426b2edd791f'
+      ],
+      [
+        '4162d488b89402039b584c6fc6c308870587d9c46f660b878ab65c82c711d67e',
+        '67163e903236289f776f22c25fb8a3afc1732f2b84b4e95dbda47ae5a0852649'
+      ],
+      [
+        '3fad3fa84caf0f34f0f89bfd2dcf54fc175d767aec3e50684f3ba4a4bf5f683d',
+        'cd1bc7cb6cc407bb2f0ca647c718a730cf71872e7d0d2a53fa20efcdfe61826'
+      ],
+      [
+        '674f2600a3007a00568c1a7ce05d0816c1fb84bf1370798f1c69532faeb1a86b',
+        '299d21f9413f33b3edf43b257004580b70db57da0b182259e09eecc69e0d38a5'
+      ],
+      [
+        'd32f4da54ade74abb81b815ad1fb3b263d82d6c692714bcff87d29bd5ee9f08f',
+        'f9429e738b8e53b968e99016c059707782e14f4535359d582fc416910b3eea87'
+      ],
+      [
+        '30e4e670435385556e593657135845d36fbb6931f72b08cb1ed954f1e3ce3ff6',
+        '462f9bce619898638499350113bbc9b10a878d35da70740dc695a559eb88db7b'
+      ],
+      [
+        'be2062003c51cc3004682904330e4dee7f3dcd10b01e580bf1971b04d4cad297',
+        '62188bc49d61e5428573d48a74e1c655b1c61090905682a0d5558ed72dccb9bc'
+      ],
+      [
+        '93144423ace3451ed29e0fb9ac2af211cb6e84a601df5993c419859fff5df04a',
+        '7c10dfb164c3425f5c71a3f9d7992038f1065224f72bb9d1d902a6d13037b47c'
+      ],
+      [
+        'b015f8044f5fcbdcf21ca26d6c34fb8197829205c7b7d2a7cb66418c157b112c',
+        'ab8c1e086d04e813744a655b2df8d5f83b3cdc6faa3088c1d3aea1454e3a1d5f'
+      ],
+      [
+        'd5e9e1da649d97d89e4868117a465a3a4f8a18de57a140d36b3f2af341a21b52',
+        '4cb04437f391ed73111a13cc1d4dd0db1693465c2240480d8955e8592f27447a'
+      ],
+      [
+        'd3ae41047dd7ca065dbf8ed77b992439983005cd72e16d6f996a5316d36966bb',
+        'bd1aeb21ad22ebb22a10f0303417c6d964f8cdd7df0aca614b10dc14d125ac46'
+      ],
+      [
+        '463e2763d885f958fc66cdd22800f0a487197d0a82e377b49f80af87c897b065',
+        'bfefacdb0e5d0fd7df3a311a94de062b26b80c61fbc97508b79992671ef7ca7f'
+      ],
+      [
+        '7985fdfd127c0567c6f53ec1bb63ec3158e597c40bfe747c83cddfc910641917',
+        '603c12daf3d9862ef2b25fe1de289aed24ed291e0ec6708703a5bd567f32ed03'
+      ],
+      [
+        '74a1ad6b5f76e39db2dd249410eac7f99e74c59cb83d2d0ed5ff1543da7703e9',
+        'cc6157ef18c9c63cd6193d83631bbea0093e0968942e8c33d5737fd790e0db08'
+      ],
+      [
+        '30682a50703375f602d416664ba19b7fc9bab42c72747463a71d0896b22f6da3',
+        '553e04f6b018b4fa6c8f39e7f311d3176290d0e0f19ca73f17714d9977a22ff8'
+      ],
+      [
+        '9e2158f0d7c0d5f26c3791efefa79597654e7a2b2464f52b1ee6c1347769ef57',
+        '712fcdd1b9053f09003a3481fa7762e9ffd7c8ef35a38509e2fbf2629008373'
+      ],
+      [
+        '176e26989a43c9cfeba4029c202538c28172e566e3c4fce7322857f3be327d66',
+        'ed8cc9d04b29eb877d270b4878dc43c19aefd31f4eee09ee7b47834c1fa4b1c3'
+      ],
+      [
+        '75d46efea3771e6e68abb89a13ad747ecf1892393dfc4f1b7004788c50374da8',
+        '9852390a99507679fd0b86fd2b39a868d7efc22151346e1a3ca4726586a6bed8'
+      ],
+      [
+        '809a20c67d64900ffb698c4c825f6d5f2310fb0451c869345b7319f645605721',
+        '9e994980d9917e22b76b061927fa04143d096ccc54963e6a5ebfa5f3f8e286c1'
+      ],
+      [
+        '1b38903a43f7f114ed4500b4eac7083fdefece1cf29c63528d563446f972c180',
+        '4036edc931a60ae889353f77fd53de4a2708b26b6f5da72ad3394119daf408f9'
+      ]
+    ]
+  }
+};
 
-ECPubKey.fromHex = function (hex) {
-  return ECPubKey.fromBuffer(new Buffer(hex, 'hex'))
-}
+},{}],54:[function(require,module,exports){
+'use strict';
 
-// Operations
-ECPubKey.prototype.getAddress = function (network) {
-  network = network || networks.bitcoin
+var utils = exports;
+var BN = require('bn.js');
 
-  return new Address(crypto.hash160(this.toBuffer()), network.pubKeyHash)
-}
+utils.assert = function assert(val, msg) {
+  if (!val)
+    throw new Error(msg || 'Assertion failed');
+};
 
-ECPubKey.prototype.verify = function (hash, signature) {
-  return ecdsa.verify(ECPubKey.curve, hash, signature, this.Q)
+function toArray(msg, enc) {
+  if (Array.isArray(msg))
+    return msg.slice();
+  if (!msg)
+    return [];
+  var res = [];
+  if (typeof msg !== 'string') {
+    for (var i = 0; i < msg.length; i++)
+      res[i] = msg[i] | 0;
+    return res;
+  }
+  if (!enc) {
+    for (var i = 0; i < msg.length; i++) {
+      var c = msg.charCodeAt(i);
+      var hi = c >> 8;
+      var lo = c & 0xff;
+      if (hi)
+        res.push(hi, lo);
+      else
+        res.push(lo);
+    }
+  } else if (enc === 'hex') {
+    msg = msg.replace(/[^a-z0-9]+/ig, '');
+    if (msg.length % 2 !== 0)
+      msg = '0' + msg;
+    for (var i = 0; i < msg.length; i += 2)
+      res.push(parseInt(msg[i] + msg[i + 1], 16));
+  }
+  return res;
 }
+utils.toArray = toArray;
 
-// Export functions
-ECPubKey.prototype.toBuffer = function () {
-  return this.Q.getEncoded(this.compressed)
+function zero2(word) {
+  if (word.length === 1)
+    return '0' + word;
+  else
+    return word;
 }
+utils.zero2 = zero2;
 
-ECPubKey.prototype.toHex = function () {
-  return this.toBuffer().toString('hex')
+function toHex(msg) {
+  var res = '';
+  for (var i = 0; i < msg.length; i++)
+    res += zero2(msg[i].toString(16));
+  return res;
 }
+utils.toHex = toHex;
 
-module.exports = ECPubKey
+utils.encode = function encode(arr, enc) {
+  if (enc === 'hex')
+    return toHex(arr);
+  else
+    return arr;
+};
 
-}).call(this,require("buffer").Buffer)
-},{"./address":54,"./crypto":58,"./ecdsa":59,"./networks":66,"buffer":7,"ecurve":49,"typeforce":53}],62:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var typeForce = require('typeforce')
+// Represent num in a w-NAF form
+function getNAF(num, w) {
+  var naf = [];
+  var ws = 1 << (w + 1);
+  var k = num.clone();
+  while (k.cmpn(1) >= 0) {
+    var z;
+    if (k.isOdd()) {
+      var mod = k.andln(ws - 1);
+      if (mod > (ws >> 1) - 1)
+        z = (ws >> 1) - mod;
+      else
+        z = mod;
+      k.isubn(z);
+    } else {
+      z = 0;
+    }
+    naf.push(z);
+
+    // Optimization, shift by word if possible
+    var shift = (k.cmpn(0) !== 0 && k.andln(ws - 1) === 0) ? (w + 1) : 1;
+    for (var i = 1; i < shift; i++)
+      naf.push(0);
+    k.iushrn(shift);
+  }
+
+  return naf;
+}
+utils.getNAF = getNAF;
+
+// Represent k1, k2 in a Joint Sparse Form
+function getJSF(k1, k2) {
+  var jsf = [
+    [],
+    []
+  ];
+
+  k1 = k1.clone();
+  k2 = k2.clone();
+  var d1 = 0;
+  var d2 = 0;
+  while (k1.cmpn(-d1) > 0 || k2.cmpn(-d2) > 0) {
+
+    // First phase
+    var m14 = (k1.andln(3) + d1) & 3;
+    var m24 = (k2.andln(3) + d2) & 3;
+    if (m14 === 3)
+      m14 = -1;
+    if (m24 === 3)
+      m24 = -1;
+    var u1;
+    if ((m14 & 1) === 0) {
+      u1 = 0;
+    } else {
+      var m8 = (k1.andln(7) + d1) & 7;
+      if ((m8 === 3 || m8 === 5) && m24 === 2)
+        u1 = -m14;
+      else
+        u1 = m14;
+    }
+    jsf[0].push(u1);
 
-var BigInteger = require('bigi')
+    var u2;
+    if ((m24 & 1) === 0) {
+      u2 = 0;
+    } else {
+      var m8 = (k2.andln(7) + d2) & 7;
+      if ((m8 === 3 || m8 === 5) && m14 === 2)
+        u2 = -m24;
+      else
+        u2 = m24;
+    }
+    jsf[1].push(u2);
 
-function ECSignature (r, s) {
-  typeForce('BigInteger', r)
-  typeForce('BigInteger', s)
+    // Second phase
+    if (2 * d1 === u1 + 1)
+      d1 = 1 - d1;
+    if (2 * d2 === u2 + 1)
+      d2 = 1 - d2;
+    k1.iushrn(1);
+    k2.iushrn(1);
+  }
 
-  this.r = r
-  this.s = s
+  return jsf;
 }
+utils.getJSF = getJSF;
 
-ECSignature.parseCompact = function (buffer) {
-  assert.equal(buffer.length, 65, 'Invalid signature length')
-  var i = buffer.readUInt8(0) - 27
+function cachedProperty(obj, name, computer) {
+  var key = '_' + name;
+  obj.prototype[name] = function cachedProperty() {
+    return this[key] !== undefined ? this[key] :
+           this[key] = computer.call(this);
+  };
+}
+utils.cachedProperty = cachedProperty;
 
-  // At most 3 bits
-  assert.equal(i, i & 7, 'Invalid signature parameter')
-  var compressed = !!(i & 4)
+function parseBytes(bytes) {
+  return typeof bytes === 'string' ? utils.toArray(bytes, 'hex') :
+                                     bytes;
+}
+utils.parseBytes = parseBytes;
 
-  // Recovery param only
-  i = i & 3
+function intFromLE(bytes) {
+  return new BN(bytes, 'hex', 'le');
+}
+utils.intFromLE = intFromLE;
 
-  var r = BigInteger.fromBuffer(buffer.slice(1, 33))
-  var s = BigInteger.fromBuffer(buffer.slice(33))
 
-  return {
-    compressed: compressed,
-    i: i,
-    signature: new ECSignature(r, s)
-  }
+},{"bn.js":33}],55:[function(require,module,exports){
+module.exports={
+  "_args": [
+    [
+      {
+        "raw": "elliptic@^6.2.3",
+        "scope": null,
+        "escapedName": "elliptic",
+        "name": "elliptic",
+        "rawSpec": "^6.2.3",
+        "spec": ">=6.2.3 <7.0.0",
+        "type": "range"
+      },
+      "/home/user/ethereum/ethereumjs-util/node_modules/secp256k1"
+    ]
+  ],
+  "_from": "elliptic@>=6.2.3 <7.0.0",
+  "_id": "elliptic@6.3.3",
+  "_inCache": true,
+  "_location": "/elliptic",
+  "_nodeVersion": "7.0.0",
+  "_npmOperationalInternal": {
+    "host": "packages-18-east.internal.npmjs.com",
+    "tmp": "tmp/elliptic-6.3.3.tgz_1486422837740_0.10658654430881143"
+  },
+  "_npmUser": {
+    "name": "indutny",
+    "email": "fedor@indutny.com"
+  },
+  "_npmVersion": "3.10.8",
+  "_phantomChildren": {},
+  "_requested": {
+    "raw": "elliptic@^6.2.3",
+    "scope": null,
+    "escapedName": "elliptic",
+    "name": "elliptic",
+    "rawSpec": "^6.2.3",
+    "spec": ">=6.2.3 <7.0.0",
+    "type": "range"
+  },
+  "_requiredBy": [
+    "/browserify-sign",
+    "/create-ecdh",
+    "/secp256k1"
+  ],
+  "_resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.3.3.tgz",
+  "_shasum": "5482d9646d54bcb89fd7d994fc9e2e9568876e3f",
+  "_shrinkwrap": null,
+  "_spec": "elliptic@^6.2.3",
+  "_where": "/home/user/ethereum/ethereumjs-util/node_modules/secp256k1",
+  "author": {
+    "name": "Fedor Indutny",
+    "email": "fedor@indutny.com"
+  },
+  "bugs": {
+    "url": "https://github.com/indutny/elliptic/issues"
+  },
+  "dependencies": {
+    "bn.js": "^4.4.0",
+    "brorand": "^1.0.1",
+    "hash.js": "^1.0.0",
+    "inherits": "^2.0.1"
+  },
+  "description": "EC cryptography",
+  "devDependencies": {
+    "brfs": "^1.4.3",
+    "coveralls": "^2.11.3",
+    "grunt": "^0.4.5",
+    "grunt-browserify": "^5.0.0",
+    "grunt-cli": "^1.2.0",
+    "grunt-contrib-connect": "^1.0.0",
+    "grunt-contrib-copy": "^1.0.0",
+    "grunt-contrib-uglify": "^1.0.1",
+    "grunt-mocha-istanbul": "^3.0.1",
+    "grunt-saucelabs": "^8.6.2",
+    "istanbul": "^0.4.2",
+    "jscs": "^2.9.0",
+    "jshint": "^2.6.0",
+    "mocha": "^2.1.0"
+  },
+  "directories": {},
+  "dist": {
+    "shasum": "5482d9646d54bcb89fd7d994fc9e2e9568876e3f",
+    "tarball": "https://registry.npmjs.org/elliptic/-/elliptic-6.3.3.tgz"
+  },
+  "files": [
+    "lib"
+  ],
+  "gitHead": "63aee8d697e9b7fac37ece24222029117a890a7e",
+  "homepage": "https://github.com/indutny/elliptic",
+  "keywords": [
+    "EC",
+    "Elliptic",
+    "curve",
+    "Cryptography"
+  ],
+  "license": "MIT",
+  "main": "lib/elliptic.js",
+  "maintainers": [
+    {
+      "name": "indutny",
+      "email": "fedor@indutny.com"
+    }
+  ],
+  "name": "elliptic",
+  "optionalDependencies": {},
+  "readme": "ERROR: No README data found!",
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://git@github.com/indutny/elliptic.git"
+  },
+  "scripts": {
+    "jscs": "jscs benchmarks/*.js lib/*.js lib/**/*.js lib/**/**/*.js test/index.js",
+    "jshint": "jscs benchmarks/*.js lib/*.js lib/**/*.js lib/**/**/*.js test/index.js",
+    "lint": "npm run jscs && npm run jshint",
+    "test": "npm run lint && npm run unit",
+    "unit": "istanbul test _mocha --reporter=spec test/index.js",
+    "version": "grunt dist && git add dist/"
+  },
+  "version": "6.3.3"
 }
 
-ECSignature.fromDER = function (buffer) {
-  assert.equal(buffer.readUInt8(0), 0x30, 'Not a DER sequence')
-  assert.equal(buffer.readUInt8(1), buffer.length - 2, 'Invalid sequence length')
-  assert.equal(buffer.readUInt8(2), 0x02, 'Expected a DER integer')
-
-  var rLen = buffer.readUInt8(3)
-  assert(rLen > 0, 'R length is zero')
-
-  var offset = 4 + rLen
-  assert.equal(buffer.readUInt8(offset), 0x02, 'Expected a DER integer (2)')
+},{}],56:[function(require,module,exports){
+(function (Buffer){
+'use strict';
 
-  var sLen = buffer.readUInt8(offset + 1)
-  assert(sLen > 0, 'S length is zero')
+var isHexPrefixed = require('is-hex-prefixed');
+var stripHexPrefix = require('strip-hex-prefix');
 
-  var rB = buffer.slice(4, offset)
-  var sB = buffer.slice(offset + 2)
-  offset += 2 + sLen
+/**
+ * Pads a `String` to have an even length
+ * @param {String} value
+ * @return {String} output
+ */
+function padToEven(value) {
+  var a = value; // eslint-disable-line
 
-  if (rLen > 1 && rB.readUInt8(0) === 0x00) {
-    assert(rB.readUInt8(1) & 0x80, 'R value excessively padded')
+  if (typeof a !== 'string') {
+    throw new Error('[ethjs-util] while padding to even, value must be string, is currently ' + typeof a + ', while padToEven.');
   }
 
-  if (sLen > 1 && sB.readUInt8(0) === 0x00) {
-    assert(sB.readUInt8(1) & 0x80, 'S value excessively padded')
+  if (a.length % 2) {
+    a = '0' + a;
   }
 
-  assert.equal(offset, buffer.length, 'Invalid DER encoding')
-  var r = BigInteger.fromDERInteger(rB)
-  var s = BigInteger.fromDERInteger(sB)
+  return a;
+}
 
-  assert(r.signum() >= 0, 'R value is negative')
-  assert(s.signum() >= 0, 'S value is negative')
+/**
+ * Converts a `Number` into a hex `String`
+ * @param {Number} i
+ * @return {String}
+ */
+function intToHex(i) {
+  var hex = i.toString(16); // eslint-disable-line
 
-  return new ECSignature(r, s)
+  return '0x' + padToEven(hex);
 }
 
-// BIP62: 1 byte hashType flag (only 0x01, 0x02, 0x03, 0x81, 0x82 and 0x83 are allowed)
-ECSignature.parseScriptSignature = function (buffer) {
-  var hashType = buffer.readUInt8(buffer.length - 1)
-  var hashTypeMod = hashType & ~0x80
-
-  assert(hashTypeMod > 0x00 && hashTypeMod < 0x04, 'Invalid hashType ' + hashType)
+/**
+ * Converts an `Number` to a `Buffer`
+ * @param {Number} i
+ * @return {Buffer}
+ */
+function intToBuffer(i) {
+  var hex = intToHex(i);
 
-  return {
-    signature: ECSignature.fromDER(buffer.slice(0, -1)),
-    hashType: hashType
-  }
+  return new Buffer(hex.slice(2), 'hex');
 }
 
-ECSignature.prototype.toCompact = function (i, compressed) {
-  if (compressed) {
-    i += 4
+/**
+ * Get the binary size of a string
+ * @param {String} str
+ * @return {Number}
+ */
+function getBinarySize(str) {
+  if (typeof str !== 'string') {
+    throw new Error('[ethjs-util] while getting binary size, method getBinarySize requires input \'str\' to be type String, got \'' + typeof str + '\'.');
   }
 
-  i += 27
-
-  var buffer = new Buffer(65)
-  buffer.writeUInt8(i, 0)
+  return Buffer.byteLength(str, 'utf8');
+}
 
-  this.r.toBuffer(32).copy(buffer, 1)
-  this.s.toBuffer(32).copy(buffer, 33)
+/**
+ * Returns TRUE if the first specified array contains all elements
+ * from the second one. FALSE otherwise.
+ *
+ * @param {array} superset
+ * @param {array} subset
+ *
+ * @returns {boolean}
+ */
+function arrayContainsArray(superset, subset, some) {
+  if (Array.isArray(superset) !== true) {
+    throw new Error('[ethjs-util] method arrayContainsArray requires input \'superset\' to be an array got type \'' + typeof superset + '\'');
+  }
+  if (Array.isArray(subset) !== true) {
+    throw new Error('[ethjs-util] method arrayContainsArray requires input \'subset\' to be an array got type \'' + typeof subset + '\'');
+  }
 
-  return buffer
+  return subset[Boolean(some) && 'some' || 'every'](function (value) {
+    return superset.indexOf(value) >= 0;
+  });
 }
 
-ECSignature.prototype.toDER = function () {
-  var rBa = this.r.toDERInteger()
-  var sBa = this.s.toDERInteger()
+/**
+ * Should be called to get utf8 from it's hex representation
+ *
+ * @method toUtf8
+ * @param {String} string in hex
+ * @returns {String} ascii string representation of hex value
+ */
+function toUtf8(hex) {
+  var bufferValue = new Buffer(padToEven(stripHexPrefix(hex).replace(/^0+|0+$/g, '')), 'hex');
 
-  var sequence = []
+  return bufferValue.toString('utf8');
+}
 
-  // INTEGER
-  sequence.push(0x02, rBa.length)
-  sequence = sequence.concat(rBa)
+/**
+ * Should be called to get ascii from it's hex representation
+ *
+ * @method toAscii
+ * @param {String} string in hex
+ * @returns {String} ascii string representation of hex value
+ */
+function toAscii(hex) {
+  var str = ''; // eslint-disable-line
+  var i = 0,
+      l = hex.length; // eslint-disable-line
 
-  // INTEGER
-  sequence.push(0x02, sBa.length)
-  sequence = sequence.concat(sBa)
+  if (hex.substring(0, 2) === '0x') {
+    i = 2;
+  }
 
-  // SEQUENCE
-  sequence.unshift(0x30, sequence.length)
+  for (; i < l; i += 2) {
+    var code = parseInt(hex.substr(i, 2), 16);
+    str += String.fromCharCode(code);
+  }
 
-  return new Buffer(sequence)
+  return str;
 }
 
-ECSignature.prototype.toScriptSignature = function (hashType) {
-  var hashTypeMod = hashType & ~0x80
-  assert(hashTypeMod > 0x00 && hashTypeMod < 0x04, 'Invalid hashType ' + hashType)
-
-  var hashTypeBuffer = new Buffer(1)
-  hashTypeBuffer.writeUInt8(hashType, 0)
+/**
+ * Should be called to get hex representation (prefixed by 0x) of utf8 string
+ *
+ * @method fromUtf8
+ * @param {String} string
+ * @param {Number} optional padding
+ * @returns {String} hex representation of input string
+ */
+function fromUtf8(stringValue) {
+  var str = new Buffer(stringValue, 'utf8');
 
-  return Buffer.concat([this.toDER(), hashTypeBuffer])
+  return '0x' + padToEven(str.toString('hex')).replace(/^0+|0+$/g, '');
 }
 
-module.exports = ECSignature
-
-}).call(this,require("buffer").Buffer)
-},{"assert":5,"bigi":3,"buffer":7,"typeforce":53}],63:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var base58check = require('bs58check')
-var bcrypto = require('./crypto')
-var createHmac = require('create-hmac')
-var typeForce = require('typeforce')
-var networks = require('./networks')
+/**
+ * Should be called to get hex representation (prefixed by 0x) of ascii string
+ *
+ * @method fromAscii
+ * @param {String} string
+ * @param {Number} optional padding
+ * @returns {String} hex representation of input string
+ */
+function fromAscii(stringValue) {
+  var hex = ''; // eslint-disable-line
+  for (var i = 0; i < stringValue.length; i++) {
+    // eslint-disable-line
+    var code = stringValue.charCodeAt(i);
+    var n = code.toString(16);
+    hex += n.length < 2 ? '0' + n : n;
+  }
 
-var BigInteger = require('bigi')
-var ECKey = require('./eckey')
-var ECPubKey = require('./ecpubkey')
+  return '0x' + hex;
+}
 
-var ecurve = require('ecurve')
-var curve = ecurve.getCurveByName('secp256k1')
+/**
+ * getKeys([{a: 1, b: 2}, {a: 3, b: 4}], 'a') => [1, 3]
+ *
+ * @method getKeys get specific key from inner object array of objects
+ * @param {String} params
+ * @param {String} key
+ * @param {Boolean} allowEmpty
+ * @returns {Array} output just a simple array of output keys
+ */
+function getKeys(params, key, allowEmpty) {
+  if (!Array.isArray(params)) {
+    throw new Error('[ethjs-util] method getKeys expecting type Array as \'params\' input, got \'' + typeof params + '\'');
+  }
+  if (typeof key !== 'string') {
+    throw new Error('[ethjs-util] method getKeys expecting type String for input \'key\' got \'' + typeof key + '\'.');
+  }
 
-function findBIP32NetworkByVersion (version) {
-  for (var name in networks) {
-    var network = networks[name]
+  var result = []; // eslint-disable-line
 
-    if (version === network.bip32.private || version === network.bip32.public) {
-      return network
+  for (var i = 0; i < params.length; i++) {
+    // eslint-disable-line
+    var value = params[i][key]; // eslint-disable-line
+    if (allowEmpty && !value) {
+      value = '';
+    } else if (typeof value !== 'string') {
+      throw new Error('invalid abi');
     }
+    result.push(value);
   }
 
-  assert(false, 'Could not find network for ' + version.toString(16))
+  return result;
 }
 
-function HDNode (K, chainCode, network) {
-  network = network || networks.bitcoin
-
-  typeForce('Buffer', chainCode)
-
-  assert.equal(chainCode.length, 32, 'Expected chainCode length of 32, got ' + chainCode.length)
-  assert(network.bip32, 'Unknown BIP32 constants for network')
-
-  this.chainCode = chainCode
-  this.depth = 0
-  this.index = 0
-  this.parentFingerprint = 0x00000000
-  this.network = network
+/**
+ * Is the string a hex string.
+ *
+ * @method check if string is hex string of specific length
+ * @param {String} value
+ * @param {Number} length
+ * @returns {Boolean} output the string is a hex string
+ */
+function isHexString(value, length) {
+  if (typeof value !== 'string' || !value.match(/^0x[0-9A-Fa-f]*$/)) {
+    return false;
+  }
 
-  if (K instanceof BigInteger) {
-    this.privKey = new ECKey(K, true)
-    this.pubKey = this.privKey.pub
-  } else if (K instanceof ECKey) {
-    assert(K.pub.compressed, 'ECKey must be compressed')
-    this.privKey = K
-    this.pubKey = K.pub
-  } else if (K instanceof ECPubKey) {
-    assert(K.compressed, 'ECPubKey must be compressed')
-    this.pubKey = K
-  } else {
-    this.pubKey = new ECPubKey(K, true)
+  if (length && value.length !== 2 + 2 * length) {
+    return false;
   }
+
+  return true;
 }
 
-HDNode.MASTER_SECRET = new Buffer('Bitcoin seed')
-HDNode.HIGHEST_BIT = 0x80000000
-HDNode.LENGTH = 78
+module.exports = {
+  arrayContainsArray: arrayContainsArray,
+  intToBuffer: intToBuffer,
+  getBinarySize: getBinarySize,
+  isHexPrefixed: isHexPrefixed,
+  stripHexPrefix: stripHexPrefix,
+  padToEven: padToEven,
+  intToHex: intToHex,
+  fromAscii: fromAscii,
+  fromUtf8: fromUtf8,
+  toAscii: toAscii,
+  toUtf8: toUtf8,
+  getKeys: getKeys,
+  isHexString: isHexString
+};
+}).call(this,require("buffer").Buffer)
+},{"buffer":5,"is-hex-prefixed":64,"strip-hex-prefix":87}],57:[function(require,module,exports){
+var hash = exports;
+
+hash.utils = require('./hash/utils');
+hash.common = require('./hash/common');
+hash.sha = require('./hash/sha');
+hash.ripemd = require('./hash/ripemd');
+hash.hmac = require('./hash/hmac');
+
+// Proxy hash functions to the main object
+hash.sha1 = hash.sha.sha1;
+hash.sha256 = hash.sha.sha256;
+hash.sha224 = hash.sha.sha224;
+hash.sha384 = hash.sha.sha384;
+hash.sha512 = hash.sha.sha512;
+hash.ripemd160 = hash.ripemd.ripemd160;
+
+},{"./hash/common":58,"./hash/hmac":59,"./hash/ripemd":60,"./hash/sha":61,"./hash/utils":62}],58:[function(require,module,exports){
+var hash = require('../hash');
+var utils = hash.utils;
+var assert = utils.assert;
+
+function BlockHash() {
+  this.pending = null;
+  this.pendingTotal = 0;
+  this.blockSize = this.constructor.blockSize;
+  this.outSize = this.constructor.outSize;
+  this.hmacStrength = this.constructor.hmacStrength;
+  this.padLength = this.constructor.padLength / 8;
+  this.endian = 'big';
+
+  this._delta8 = this.blockSize / 8;
+  this._delta32 = this.blockSize / 32;
+}
+exports.BlockHash = BlockHash;
+
+BlockHash.prototype.update = function update(msg, enc) {
+  // Convert message to array, pad it, and join into 32bit blocks
+  msg = utils.toArray(msg, enc);
+  if (!this.pending)
+    this.pending = msg;
+  else
+    this.pending = this.pending.concat(msg);
+  this.pendingTotal += msg.length;
 
-HDNode.fromSeedBuffer = function (seed, network) {
-  typeForce('Buffer', seed)
+  // Enough data, try updating
+  if (this.pending.length >= this._delta8) {
+    msg = this.pending;
 
-  assert(seed.length >= 16, 'Seed should be at least 128 bits')
-  assert(seed.length <= 64, 'Seed should be at most 512 bits')
+    // Process pending data in blocks
+    var r = msg.length % this._delta8;
+    this.pending = msg.slice(msg.length - r, msg.length);
+    if (this.pending.length === 0)
+      this.pending = null;
 
-  var I = createHmac('sha512', HDNode.MASTER_SECRET).update(seed).digest()
-  var IL = I.slice(0, 32)
-  var IR = I.slice(32)
+    msg = utils.join32(msg, 0, msg.length - r, this.endian);
+    for (var i = 0; i < msg.length; i += this._delta32)
+      this._update(msg, i, i + this._delta32);
+  }
 
-  // In case IL is 0 or >= n, the master key is invalid
-  // This is handled by `new ECKey` in the HDNode constructor
-  var pIL = BigInteger.fromBuffer(IL)
+  return this;
+};
 
-  return new HDNode(pIL, IR, network)
-}
+BlockHash.prototype.digest = function digest(enc) {
+  this.update(this._pad());
+  assert(this.pending === null);
 
-HDNode.fromSeedHex = function (hex, network) {
-  return HDNode.fromSeedBuffer(new Buffer(hex, 'hex'), network)
-}
+  return this._digest(enc);
+};
 
-HDNode.fromBase58 = function (string, network) {
-  return HDNode.fromBuffer(base58check.decode(string), network, true)
-}
+BlockHash.prototype._pad = function pad() {
+  var len = this.pendingTotal;
+  var bytes = this._delta8;
+  var k = bytes - ((len + this.padLength) % bytes);
+  var res = new Array(k + this.padLength);
+  res[0] = 0x80;
+  for (var i = 1; i < k; i++)
+    res[i] = 0;
+
+  // Append length
+  len <<= 3;
+  if (this.endian === 'big') {
+    for (var t = 8; t < this.padLength; t++)
+      res[i++] = 0;
+
+    res[i++] = 0;
+    res[i++] = 0;
+    res[i++] = 0;
+    res[i++] = 0;
+    res[i++] = (len >>> 24) & 0xff;
+    res[i++] = (len >>> 16) & 0xff;
+    res[i++] = (len >>> 8) & 0xff;
+    res[i++] = len & 0xff;
+  } else {
+    res[i++] = len & 0xff;
+    res[i++] = (len >>> 8) & 0xff;
+    res[i++] = (len >>> 16) & 0xff;
+    res[i++] = (len >>> 24) & 0xff;
+    res[i++] = 0;
+    res[i++] = 0;
+    res[i++] = 0;
+    res[i++] = 0;
 
-// FIXME: remove in 2.x.y
-HDNode.fromBuffer = function (buffer, network, __ignoreDeprecation) {
-  if (!__ignoreDeprecation) {
-    console.warn('HDNode.fromBuffer() is deprecated for removal in 2.x.y, use fromBase58 instead')
+    for (var t = 8; t < this.padLength; t++)
+      res[i++] = 0;
   }
 
-  assert.strictEqual(buffer.length, HDNode.LENGTH, 'Invalid buffer length')
+  return res;
+};
 
-  // 4 byte: version bytes
-  var version = buffer.readUInt32BE(0)
+},{"../hash":57}],59:[function(require,module,exports){
+var hmac = exports;
 
-  if (network) {
-    assert(version === network.bip32.private || version === network.bip32.public, "Network doesn't match")
+var hash = require('../hash');
+var utils = hash.utils;
+var assert = utils.assert;
 
-  // auto-detect
-  } else {
-    network = findBIP32NetworkByVersion(version)
-  }
+function Hmac(hash, key, enc) {
+  if (!(this instanceof Hmac))
+    return new Hmac(hash, key, enc);
+  this.Hash = hash;
+  this.blockSize = hash.blockSize / 8;
+  this.outSize = hash.outSize / 8;
+  this.inner = null;
+  this.outer = null;
 
-  // 1 byte: depth: 0x00 for master nodes, 0x01 for level-1 descendants, ...
-  var depth = buffer.readUInt8(4)
+  this._init(utils.toArray(key, enc));
+}
+module.exports = Hmac;
 
-  // 4 bytes: the fingerprint of the parent's key (0x00000000 if master key)
-  var parentFingerprint = buffer.readUInt32BE(5)
-  if (depth === 0) {
-    assert.strictEqual(parentFingerprint, 0x00000000, 'Invalid parent fingerprint')
-  }
+Hmac.prototype._init = function init(key) {
+  // Shorten key, if needed
+  if (key.length > this.blockSize)
+    key = new this.Hash().update(key).digest();
+  assert(key.length <= this.blockSize);
 
-  // 4 bytes: child number. This is the number i in xi = xpar/i, with xi the key being serialized.
-  // This is encoded in MSB order. (0x00000000 if master key)
-  var index = buffer.readUInt32BE(9)
-  assert(depth > 0 || index === 0, 'Invalid index')
+  // Add padding to key
+  for (var i = key.length; i < this.blockSize; i++)
+    key.push(0);
 
-  // 32 bytes: the chain code
-  var chainCode = buffer.slice(13, 45)
-  var data, hd
+  for (var i = 0; i < key.length; i++)
+    key[i] ^= 0x36;
+  this.inner = new this.Hash().update(key);
 
-  // 33 bytes: private key data (0x00 + k)
-  if (version === network.bip32.private) {
-    assert.strictEqual(buffer.readUInt8(45), 0x00, 'Invalid private key')
-    data = buffer.slice(46, 78)
-    var d = BigInteger.fromBuffer(data)
-    hd = new HDNode(d, chainCode, network)
+  // 0x36 ^ 0x5c = 0x6a
+  for (var i = 0; i < key.length; i++)
+    key[i] ^= 0x6a;
+  this.outer = new this.Hash().update(key);
+};
 
-  // 33 bytes: public key data (0x02 + X or 0x03 + X)
-  } else {
-    data = buffer.slice(45, 78)
-    var Q = ecurve.Point.decodeFrom(curve, data)
-    assert.equal(Q.compressed, true, 'Invalid public key')
+Hmac.prototype.update = function update(msg, enc) {
+  this.inner.update(msg, enc);
+  return this;
+};
 
-    // Verify that the X coordinate in the public point corresponds to a point on the curve.
-    // If not, the extended public key is invalid.
-    curve.validate(Q)
+Hmac.prototype.digest = function digest(enc) {
+  this.outer.update(this.inner.digest());
+  return this.outer.digest(enc);
+};
 
-    hd = new HDNode(Q, chainCode, network)
-  }
+},{"../hash":57}],60:[function(require,module,exports){
+var hash = require('../hash');
+var utils = hash.utils;
+
+var rotl32 = utils.rotl32;
+var sum32 = utils.sum32;
+var sum32_3 = utils.sum32_3;
+var sum32_4 = utils.sum32_4;
+var BlockHash = hash.common.BlockHash;
+
+function RIPEMD160() {
+  if (!(this instanceof RIPEMD160))
+    return new RIPEMD160();
+
+  BlockHash.call(this);
+
+  this.h = [ 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 ];
+  this.endian = 'little';
+}
+utils.inherits(RIPEMD160, BlockHash);
+exports.ripemd160 = RIPEMD160;
+
+RIPEMD160.blockSize = 512;
+RIPEMD160.outSize = 160;
+RIPEMD160.hmacStrength = 192;
+RIPEMD160.padLength = 64;
+
+RIPEMD160.prototype._update = function update(msg, start) {
+  var A = this.h[0];
+  var B = this.h[1];
+  var C = this.h[2];
+  var D = this.h[3];
+  var E = this.h[4];
+  var Ah = A;
+  var Bh = B;
+  var Ch = C;
+  var Dh = D;
+  var Eh = E;
+  for (var j = 0; j < 80; j++) {
+    var T = sum32(
+      rotl32(
+        sum32_4(A, f(j, B, C, D), msg[r[j] + start], K(j)),
+        s[j]),
+      E);
+    A = E;
+    E = D;
+    D = rotl32(C, 10);
+    C = B;
+    B = T;
+    T = sum32(
+      rotl32(
+        sum32_4(Ah, f(79 - j, Bh, Ch, Dh), msg[rh[j] + start], Kh(j)),
+        sh[j]),
+      Eh);
+    Ah = Eh;
+    Eh = Dh;
+    Dh = rotl32(Ch, 10);
+    Ch = Bh;
+    Bh = T;
+  }
+  T = sum32_3(this.h[1], C, Dh);
+  this.h[1] = sum32_3(this.h[2], D, Eh);
+  this.h[2] = sum32_3(this.h[3], E, Ah);
+  this.h[3] = sum32_3(this.h[4], A, Bh);
+  this.h[4] = sum32_3(this.h[0], B, Ch);
+  this.h[0] = T;
+};
 
-  hd.depth = depth
-  hd.index = index
-  hd.parentFingerprint = parentFingerprint
+RIPEMD160.prototype._digest = function digest(enc) {
+  if (enc === 'hex')
+    return utils.toHex32(this.h, 'little');
+  else
+    return utils.split32(this.h, 'little');
+};
 
-  return hd
+function f(j, x, y, z) {
+  if (j <= 15)
+    return x ^ y ^ z;
+  else if (j <= 31)
+    return (x & y) | ((~x) & z);
+  else if (j <= 47)
+    return (x | (~y)) ^ z;
+  else if (j <= 63)
+    return (x & z) | (y & (~z));
+  else
+    return x ^ (y | (~z));
+}
+
+function K(j) {
+  if (j <= 15)
+    return 0x00000000;
+  else if (j <= 31)
+    return 0x5a827999;
+  else if (j <= 47)
+    return 0x6ed9eba1;
+  else if (j <= 63)
+    return 0x8f1bbcdc;
+  else
+    return 0xa953fd4e;
+}
+
+function Kh(j) {
+  if (j <= 15)
+    return 0x50a28be6;
+  else if (j <= 31)
+    return 0x5c4dd124;
+  else if (j <= 47)
+    return 0x6d703ef3;
+  else if (j <= 63)
+    return 0x7a6d76e9;
+  else
+    return 0x00000000;
 }
 
-// FIXME: remove in 2.x.y
-HDNode.fromHex = function (hex, network) {
-  return HDNode.fromBuffer(new Buffer(hex, 'hex'), network)
-}
+var r = [
+  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+  7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
+  3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
+  1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
+  4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
+];
 
-HDNode.prototype.getIdentifier = function () {
-  return bcrypto.hash160(this.pubKey.toBuffer())
-}
+var rh = [
+  5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
+  6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
+  15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
+  8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
+  12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
+];
 
-HDNode.prototype.getFingerprint = function () {
-  return this.getIdentifier().slice(0, 4)
-}
+var s = [
+  11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
+  7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
+  11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
+  11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
+  9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
+];
 
-HDNode.prototype.getAddress = function () {
-  return this.pubKey.getAddress(this.network)
-}
+var sh = [
+  8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
+  9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
+  9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
+  15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
+  8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
+];
 
-HDNode.prototype.neutered = function () {
-  var neutered = new HDNode(this.pubKey.Q, this.chainCode, this.network)
-  neutered.depth = this.depth
-  neutered.index = this.index
-  neutered.parentFingerprint = this.parentFingerprint
+},{"../hash":57}],61:[function(require,module,exports){
+var hash = require('../hash');
+var utils = hash.utils;
+var assert = utils.assert;
+
+var rotr32 = utils.rotr32;
+var rotl32 = utils.rotl32;
+var sum32 = utils.sum32;
+var sum32_4 = utils.sum32_4;
+var sum32_5 = utils.sum32_5;
+var rotr64_hi = utils.rotr64_hi;
+var rotr64_lo = utils.rotr64_lo;
+var shr64_hi = utils.shr64_hi;
+var shr64_lo = utils.shr64_lo;
+var sum64 = utils.sum64;
+var sum64_hi = utils.sum64_hi;
+var sum64_lo = utils.sum64_lo;
+var sum64_4_hi = utils.sum64_4_hi;
+var sum64_4_lo = utils.sum64_4_lo;
+var sum64_5_hi = utils.sum64_5_hi;
+var sum64_5_lo = utils.sum64_5_lo;
+var BlockHash = hash.common.BlockHash;
+
+var sha256_K = [
+  0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
+  0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
+  0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
+  0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
+  0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
+  0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+  0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
+  0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
+  0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
+  0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+  0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
+  0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+  0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
+  0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
+  0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
+  0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+];
 
-  return neutered
-}
+var sha512_K = [
+  0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd,
+  0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,
+  0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019,
+  0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,
+  0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe,
+  0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,
+  0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1,
+  0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,
+  0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3,
+  0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,
+  0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483,
+  0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,
+  0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210,
+  0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,
+  0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725,
+  0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,
+  0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926,
+  0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,
+  0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8,
+  0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,
+  0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001,
+  0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,
+  0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910,
+  0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,
+  0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53,
+  0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,
+  0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb,
+  0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,
+  0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60,
+  0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,
+  0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9,
+  0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,
+  0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207,
+  0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,
+  0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6,
+  0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,
+  0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493,
+  0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,
+  0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a,
+  0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817
+];
 
-HDNode.prototype.toBase58 = function (isPrivate) {
-  return base58check.encode(this.toBuffer(isPrivate, true))
-}
+var sha1_K = [
+  0x5A827999, 0x6ED9EBA1,
+  0x8F1BBCDC, 0xCA62C1D6
+];
 
-// FIXME: remove in 2.x.y
-HDNode.prototype.toBuffer = function (isPrivate, __ignoreDeprecation) {
-  if (isPrivate === undefined) {
-    isPrivate = !!this.privKey
+function SHA256() {
+  if (!(this instanceof SHA256))
+    return new SHA256();
+
+  BlockHash.call(this);
+  this.h = [ 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
+             0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 ];
+  this.k = sha256_K;
+  this.W = new Array(64);
+}
+utils.inherits(SHA256, BlockHash);
+exports.sha256 = SHA256;
+
+SHA256.blockSize = 512;
+SHA256.outSize = 256;
+SHA256.hmacStrength = 192;
+SHA256.padLength = 64;
+
+SHA256.prototype._update = function _update(msg, start) {
+  var W = this.W;
+
+  for (var i = 0; i < 16; i++)
+    W[i] = msg[start + i];
+  for (; i < W.length; i++)
+    W[i] = sum32_4(g1_256(W[i - 2]), W[i - 7], g0_256(W[i - 15]), W[i - 16]);
+
+  var a = this.h[0];
+  var b = this.h[1];
+  var c = this.h[2];
+  var d = this.h[3];
+  var e = this.h[4];
+  var f = this.h[5];
+  var g = this.h[6];
+  var h = this.h[7];
+
+  assert(this.k.length === W.length);
+  for (var i = 0; i < W.length; i++) {
+    var T1 = sum32_5(h, s1_256(e), ch32(e, f, g), this.k[i], W[i]);
+    var T2 = sum32(s0_256(a), maj32(a, b, c));
+    h = g;
+    g = f;
+    f = e;
+    e = sum32(d, T1);
+    d = c;
+    c = b;
+    b = a;
+    a = sum32(T1, T2);
+  }
+
+  this.h[0] = sum32(this.h[0], a);
+  this.h[1] = sum32(this.h[1], b);
+  this.h[2] = sum32(this.h[2], c);
+  this.h[3] = sum32(this.h[3], d);
+  this.h[4] = sum32(this.h[4], e);
+  this.h[5] = sum32(this.h[5], f);
+  this.h[6] = sum32(this.h[6], g);
+  this.h[7] = sum32(this.h[7], h);
+};
 
-  // FIXME: remove in 2.x.y
-  } else {
-    console.warn('isPrivate flag is deprecated, please use the .neutered() method instead')
-  }
+SHA256.prototype._digest = function digest(enc) {
+  if (enc === 'hex')
+    return utils.toHex32(this.h, 'big');
+  else
+    return utils.split32(this.h, 'big');
+};
 
-  if (!__ignoreDeprecation) {
-    console.warn('HDNode.toBuffer() is deprecated for removal in 2.x.y, use toBase58 instead')
-  }
+function SHA224() {
+  if (!(this instanceof SHA224))
+    return new SHA224();
 
-  // Version
-  var version = isPrivate ? this.network.bip32.private : this.network.bip32.public
-  var buffer = new Buffer(HDNode.LENGTH)
+  SHA256.call(this);
+  this.h = [ 0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
+             0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4 ];
+}
+utils.inherits(SHA224, SHA256);
+exports.sha224 = SHA224;
 
-  // 4 bytes: version bytes
-  buffer.writeUInt32BE(version, 0)
+SHA224.blockSize = 512;
+SHA224.outSize = 224;
+SHA224.hmacStrength = 192;
+SHA224.padLength = 64;
 
-  // Depth
-  // 1 byte: depth: 0x00 for master nodes, 0x01 for level-1 descendants, ....
-  buffer.writeUInt8(this.depth, 4)
+SHA224.prototype._digest = function digest(enc) {
+  // Just truncate output
+  if (enc === 'hex')
+    return utils.toHex32(this.h.slice(0, 7), 'big');
+  else
+    return utils.split32(this.h.slice(0, 7), 'big');
+};
 
-  // 4 bytes: the fingerprint of the parent's key (0x00000000 if master key)
-  buffer.writeUInt32BE(this.parentFingerprint, 5)
+function SHA512() {
+  if (!(this instanceof SHA512))
+    return new SHA512();
+
+  BlockHash.call(this);
+  this.h = [ 0x6a09e667, 0xf3bcc908,
+             0xbb67ae85, 0x84caa73b,
+             0x3c6ef372, 0xfe94f82b,
+             0xa54ff53a, 0x5f1d36f1,
+             0x510e527f, 0xade682d1,
+             0x9b05688c, 0x2b3e6c1f,
+             0x1f83d9ab, 0xfb41bd6b,
+             0x5be0cd19, 0x137e2179 ];
+  this.k = sha512_K;
+  this.W = new Array(160);
+}
+utils.inherits(SHA512, BlockHash);
+exports.sha512 = SHA512;
+
+SHA512.blockSize = 1024;
+SHA512.outSize = 512;
+SHA512.hmacStrength = 192;
+SHA512.padLength = 128;
+
+SHA512.prototype._prepareBlock = function _prepareBlock(msg, start) {
+  var W = this.W;
+
+  // 32 x 32bit words
+  for (var i = 0; i < 32; i++)
+    W[i] = msg[start + i];
+  for (; i < W.length; i += 2) {
+    var c0_hi = g1_512_hi(W[i - 4], W[i - 3]);  // i - 2
+    var c0_lo = g1_512_lo(W[i - 4], W[i - 3]);
+    var c1_hi = W[i - 14];  // i - 7
+    var c1_lo = W[i - 13];
+    var c2_hi = g0_512_hi(W[i - 30], W[i - 29]);  // i - 15
+    var c2_lo = g0_512_lo(W[i - 30], W[i - 29]);
+    var c3_hi = W[i - 32];  // i - 16
+    var c3_lo = W[i - 31];
+
+    W[i] = sum64_4_hi(c0_hi, c0_lo,
+                      c1_hi, c1_lo,
+                      c2_hi, c2_lo,
+                      c3_hi, c3_lo);
+    W[i + 1] = sum64_4_lo(c0_hi, c0_lo,
+                          c1_hi, c1_lo,
+                          c2_hi, c2_lo,
+                          c3_hi, c3_lo);
+  }
+};
 
-  // 4 bytes: child number. This is the number i in xi = xpar/i, with xi the key being serialized.
-  // This is encoded in Big endian. (0x00000000 if master key)
-  buffer.writeUInt32BE(this.index, 9)
+SHA512.prototype._update = function _update(msg, start) {
+  this._prepareBlock(msg, start);
+
+  var W = this.W;
+
+  var ah = this.h[0];
+  var al = this.h[1];
+  var bh = this.h[2];
+  var bl = this.h[3];
+  var ch = this.h[4];
+  var cl = this.h[5];
+  var dh = this.h[6];
+  var dl = this.h[7];
+  var eh = this.h[8];
+  var el = this.h[9];
+  var fh = this.h[10];
+  var fl = this.h[11];
+  var gh = this.h[12];
+  var gl = this.h[13];
+  var hh = this.h[14];
+  var hl = this.h[15];
+
+  assert(this.k.length === W.length);
+  for (var i = 0; i < W.length; i += 2) {
+    var c0_hi = hh;
+    var c0_lo = hl;
+    var c1_hi = s1_512_hi(eh, el);
+    var c1_lo = s1_512_lo(eh, el);
+    var c2_hi = ch64_hi(eh, el, fh, fl, gh, gl);
+    var c2_lo = ch64_lo(eh, el, fh, fl, gh, gl);
+    var c3_hi = this.k[i];
+    var c3_lo = this.k[i + 1];
+    var c4_hi = W[i];
+    var c4_lo = W[i + 1];
+
+    var T1_hi = sum64_5_hi(c0_hi, c0_lo,
+                           c1_hi, c1_lo,
+                           c2_hi, c2_lo,
+                           c3_hi, c3_lo,
+                           c4_hi, c4_lo);
+    var T1_lo = sum64_5_lo(c0_hi, c0_lo,
+                           c1_hi, c1_lo,
+                           c2_hi, c2_lo,
+                           c3_hi, c3_lo,
+                           c4_hi, c4_lo);
+
+    var c0_hi = s0_512_hi(ah, al);
+    var c0_lo = s0_512_lo(ah, al);
+    var c1_hi = maj64_hi(ah, al, bh, bl, ch, cl);
+    var c1_lo = maj64_lo(ah, al, bh, bl, ch, cl);
+
+    var T2_hi = sum64_hi(c0_hi, c0_lo, c1_hi, c1_lo);
+    var T2_lo = sum64_lo(c0_hi, c0_lo, c1_hi, c1_lo);
+
+    hh = gh;
+    hl = gl;
+
+    gh = fh;
+    gl = fl;
+
+    fh = eh;
+    fl = el;
+
+    eh = sum64_hi(dh, dl, T1_hi, T1_lo);
+    el = sum64_lo(dl, dl, T1_hi, T1_lo);
+
+    dh = ch;
+    dl = cl;
+
+    ch = bh;
+    cl = bl;
+
+    bh = ah;
+    bl = al;
+
+    ah = sum64_hi(T1_hi, T1_lo, T2_hi, T2_lo);
+    al = sum64_lo(T1_hi, T1_lo, T2_hi, T2_lo);
+  }
+
+  sum64(this.h, 0, ah, al);
+  sum64(this.h, 2, bh, bl);
+  sum64(this.h, 4, ch, cl);
+  sum64(this.h, 6, dh, dl);
+  sum64(this.h, 8, eh, el);
+  sum64(this.h, 10, fh, fl);
+  sum64(this.h, 12, gh, gl);
+  sum64(this.h, 14, hh, hl);
+};
 
-  // 32 bytes: the chain code
-  this.chainCode.copy(buffer, 13)
+SHA512.prototype._digest = function digest(enc) {
+  if (enc === 'hex')
+    return utils.toHex32(this.h, 'big');
+  else
+    return utils.split32(this.h, 'big');
+};
 
-  // 33 bytes: the public key or private key data
-  if (isPrivate) {
-    // FIXME: remove in 2.x.y
-    assert(this.privKey, 'Missing private key')
+function SHA384() {
+  if (!(this instanceof SHA384))
+    return new SHA384();
+
+  SHA512.call(this);
+  this.h = [ 0xcbbb9d5d, 0xc1059ed8,
+             0x629a292a, 0x367cd507,
+             0x9159015a, 0x3070dd17,
+             0x152fecd8, 0xf70e5939,
+             0x67332667, 0xffc00b31,
+             0x8eb44a87, 0x68581511,
+             0xdb0c2e0d, 0x64f98fa7,
+             0x47b5481d, 0xbefa4fa4 ];
+}
+utils.inherits(SHA384, SHA512);
+exports.sha384 = SHA384;
+
+SHA384.blockSize = 1024;
+SHA384.outSize = 384;
+SHA384.hmacStrength = 192;
+SHA384.padLength = 128;
+
+SHA384.prototype._digest = function digest(enc) {
+  if (enc === 'hex')
+    return utils.toHex32(this.h.slice(0, 12), 'big');
+  else
+    return utils.split32(this.h.slice(0, 12), 'big');
+};
 
-    // 0x00 + k for private keys
-    buffer.writeUInt8(0, 45)
-    this.privKey.d.toBuffer(32).copy(buffer, 46)
-  } else {
-    // X9.62 encoding for public keys
-    this.pubKey.toBuffer().copy(buffer, 45)
-  }
+function SHA1() {
+  if (!(this instanceof SHA1))
+    return new SHA1();
 
-  return buffer
+  BlockHash.call(this);
+  this.h = [ 0x67452301, 0xefcdab89, 0x98badcfe,
+             0x10325476, 0xc3d2e1f0 ];
+  this.W = new Array(80);
 }
 
-// FIXME: remove in 2.x.y
-HDNode.prototype.toHex = function (isPrivate) {
-  return this.toBuffer(isPrivate).toString('hex')
-}
+utils.inherits(SHA1, BlockHash);
+exports.sha1 = SHA1;
 
-// https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#child-key-derivation-ckd-functions
-HDNode.prototype.derive = function (index) {
-  var isHardened = index >= HDNode.HIGHEST_BIT
-  var indexBuffer = new Buffer(4)
-  indexBuffer.writeUInt32BE(index, 0)
+SHA1.blockSize = 512;
+SHA1.outSize = 160;
+SHA1.hmacStrength = 80;
+SHA1.padLength = 64;
 
-  var data
+SHA1.prototype._update = function _update(msg, start) {
+  var W = this.W;
 
-  // Hardened child
-  if (isHardened) {
-    assert(this.privKey, 'Could not derive hardened child key')
+  for (var i = 0; i < 16; i++)
+    W[i] = msg[start + i];
 
-    // data = 0x00 || ser256(kpar) || ser32(index)
-    data = Buffer.concat([
-      this.privKey.d.toBuffer(33),
-      indexBuffer
-    ])
+  for(; i < W.length; i++)
+    W[i] = rotl32(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16], 1);
 
-  // Normal child
-  } else {
-    // data = serP(point(kpar)) || ser32(index)
-    //      = serP(Kpar) || ser32(index)
-    data = Buffer.concat([
-      this.pubKey.toBuffer(),
-      indexBuffer
-    ])
-  }
+  var a = this.h[0];
+  var b = this.h[1];
+  var c = this.h[2];
+  var d = this.h[3];
+  var e = this.h[4];
 
-  var I = createHmac('sha512', this.chainCode).update(data).digest()
-  var IL = I.slice(0, 32)
-  var IR = I.slice(32)
+  for (var i = 0; i < W.length; i++) {
+    var s = ~~(i / 20);
+    var t = sum32_5(rotl32(a, 5), ft_1(s, b, c, d), e, W[i], sha1_K[s]);
+    e = d;
+    d = c;
+    c = rotl32(b, 30);
+    b = a;
+    a = t;
+  }
 
-  var pIL = BigInteger.fromBuffer(IL)
+  this.h[0] = sum32(this.h[0], a);
+  this.h[1] = sum32(this.h[1], b);
+  this.h[2] = sum32(this.h[2], c);
+  this.h[3] = sum32(this.h[3], d);
+  this.h[4] = sum32(this.h[4], e);
+};
 
-  // In case parse256(IL) >= n, proceed with the next value for i
-  if (pIL.compareTo(curve.n) >= 0) {
-    return this.derive(index + 1)
-  }
+SHA1.prototype._digest = function digest(enc) {
+  if (enc === 'hex')
+    return utils.toHex32(this.h, 'big');
+  else
+    return utils.split32(this.h, 'big');
+};
 
-  // Private parent key -> private child key
-  var hd
-  if (this.privKey) {
-    // ki = parse256(IL) + kpar (mod n)
-    var ki = pIL.add(this.privKey.d).mod(curve.n)
+function ch32(x, y, z) {
+  return (x & y) ^ ((~x) & z);
+}
 
-    // In case ki == 0, proceed with the next value for i
-    if (ki.signum() === 0) {
-      return this.derive(index + 1)
-    }
+function maj32(x, y, z) {
+  return (x & y) ^ (x & z) ^ (y & z);
+}
 
-    hd = new HDNode(ki, IR, this.network)
+function p32(x, y, z) {
+  return x ^ y ^ z;
+}
 
-  // Public parent key -> public child key
-  } else {
-    // Ki = point(parse256(IL)) + Kpar
-    //    = G*IL + Kpar
-    var Ki = curve.G.multiply(pIL).add(this.pubKey.Q)
+function s0_256(x) {
+  return rotr32(x, 2) ^ rotr32(x, 13) ^ rotr32(x, 22);
+}
 
-    // In case Ki is the point at infinity, proceed with the next value for i
-    if (curve.isInfinity(Ki)) {
-      return this.derive(index + 1)
-    }
+function s1_256(x) {
+  return rotr32(x, 6) ^ rotr32(x, 11) ^ rotr32(x, 25);
+}
 
-    hd = new HDNode(Ki, IR, this.network)
-  }
+function g0_256(x) {
+  return rotr32(x, 7) ^ rotr32(x, 18) ^ (x >>> 3);
+}
 
-  hd.depth = this.depth + 1
-  hd.index = index
-  hd.parentFingerprint = this.getFingerprint().readUInt32BE(0)
+function g1_256(x) {
+  return rotr32(x, 17) ^ rotr32(x, 19) ^ (x >>> 10);
+}
 
-  return hd
+function ft_1(s, x, y, z) {
+  if (s === 0)
+    return ch32(x, y, z);
+  if (s === 1 || s === 3)
+    return p32(x, y, z);
+  if (s === 2)
+    return maj32(x, y, z);
 }
 
-HDNode.prototype.deriveHardened = function (index) {
-  // Only derives hardened private keys by default
-  return this.derive(index + HDNode.HIGHEST_BIT)
+function ch64_hi(xh, xl, yh, yl, zh, zl) {
+  var r = (xh & yh) ^ ((~xh) & zh);
+  if (r < 0)
+    r += 0x100000000;
+  return r;
 }
 
-HDNode.prototype.toString = HDNode.prototype.toBase58
+function ch64_lo(xh, xl, yh, yl, zh, zl) {
+  var r = (xl & yl) ^ ((~xl) & zl);
+  if (r < 0)
+    r += 0x100000000;
+  return r;
+}
 
-module.exports = HDNode
+function maj64_hi(xh, xl, yh, yl, zh, zl) {
+  var r = (xh & yh) ^ (xh & zh) ^ (yh & zh);
+  if (r < 0)
+    r += 0x100000000;
+  return r;
+}
 
-}).call(this,require("buffer").Buffer)
-},{"./crypto":58,"./eckey":60,"./ecpubkey":61,"./networks":66,"assert":5,"bigi":3,"bs58check":31,"buffer":7,"create-hmac":45,"ecurve":49,"typeforce":53}],64:[function(require,module,exports){
-module.exports = {
-  Address: require('./address'),
-  base58check: require('./base58check'),
-  Block: require('./block'),
-  bufferutils: require('./bufferutils'),
-  crypto: require('./crypto'),
-  ecdsa: require('./ecdsa'),
-  ECKey: require('./eckey'),
-  ECPubKey: require('./ecpubkey'),
-  ECSignature: require('./ecsignature'),
-  Message: require('./message'),
-  opcodes: require('./opcodes'),
-  HDNode: require('./hdnode'),
-  Script: require('./script'),
-  scripts: require('./scripts'),
-  Transaction: require('./transaction'),
-  TransactionBuilder: require('./transaction_builder'),
-  networks: require('./networks'),
-  Wallet: require('./wallet')
+function maj64_lo(xh, xl, yh, yl, zh, zl) {
+  var r = (xl & yl) ^ (xl & zl) ^ (yl & zl);
+  if (r < 0)
+    r += 0x100000000;
+  return r;
 }
 
-},{"./address":54,"./base58check":55,"./block":56,"./bufferutils":57,"./crypto":58,"./ecdsa":59,"./eckey":60,"./ecpubkey":61,"./ecsignature":62,"./hdnode":63,"./message":65,"./networks":66,"./opcodes":67,"./script":68,"./scripts":69,"./transaction":70,"./transaction_builder":71,"./wallet":72}],65:[function(require,module,exports){
-(function (Buffer){
-var bufferutils = require('./bufferutils')
-var crypto = require('./crypto')
-var ecdsa = require('./ecdsa')
-var networks = require('./networks')
+function s0_512_hi(xh, xl) {
+  var c0_hi = rotr64_hi(xh, xl, 28);
+  var c1_hi = rotr64_hi(xl, xh, 2);  // 34
+  var c2_hi = rotr64_hi(xl, xh, 7);  // 39
 
-var BigInteger = require('bigi')
-var ECPubKey = require('./ecpubkey')
-var ECSignature = require('./ecsignature')
+  var r = c0_hi ^ c1_hi ^ c2_hi;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
+}
 
-var ecurve = require('ecurve')
-var ecparams = ecurve.getCurveByName('secp256k1')
+function s0_512_lo(xh, xl) {
+  var c0_lo = rotr64_lo(xh, xl, 28);
+  var c1_lo = rotr64_lo(xl, xh, 2);  // 34
+  var c2_lo = rotr64_lo(xl, xh, 7);  // 39
 
-function magicHash (message, network) {
-  var magicPrefix = new Buffer(network.magicPrefix)
-  var messageBuffer = new Buffer(message)
-  var lengthBuffer = bufferutils.varIntBuffer(messageBuffer.length)
+  var r = c0_lo ^ c1_lo ^ c2_lo;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
+}
 
-  var buffer = Buffer.concat([magicPrefix, lengthBuffer, messageBuffer])
-  return crypto.hash256(buffer)
+function s1_512_hi(xh, xl) {
+  var c0_hi = rotr64_hi(xh, xl, 14);
+  var c1_hi = rotr64_hi(xh, xl, 18);
+  var c2_hi = rotr64_hi(xl, xh, 9);  // 41
+
+  var r = c0_hi ^ c1_hi ^ c2_hi;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
 }
 
-function sign (privKey, message, network) {
-  network = network || networks.bitcoin
+function s1_512_lo(xh, xl) {
+  var c0_lo = rotr64_lo(xh, xl, 14);
+  var c1_lo = rotr64_lo(xh, xl, 18);
+  var c2_lo = rotr64_lo(xl, xh, 9);  // 41
 
-  var hash = magicHash(message, network)
-  var signature = privKey.sign(hash)
-  var e = BigInteger.fromBuffer(hash)
-  var i = ecdsa.calcPubKeyRecoveryParam(ecparams, e, signature, privKey.pub.Q)
+  var r = c0_lo ^ c1_lo ^ c2_lo;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
+}
 
-  return signature.toCompact(i, privKey.pub.compressed)
+function g0_512_hi(xh, xl) {
+  var c0_hi = rotr64_hi(xh, xl, 1);
+  var c1_hi = rotr64_hi(xh, xl, 8);
+  var c2_hi = shr64_hi(xh, xl, 7);
+
+  var r = c0_hi ^ c1_hi ^ c2_hi;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
 }
 
-// TODO: network could be implied from address
-function verify (address, signature, message, network) {
-  if (!Buffer.isBuffer(signature)) {
-    signature = new Buffer(signature, 'base64')
-  }
+function g0_512_lo(xh, xl) {
+  var c0_lo = rotr64_lo(xh, xl, 1);
+  var c1_lo = rotr64_lo(xh, xl, 8);
+  var c2_lo = shr64_lo(xh, xl, 7);
 
-  network = network || networks.bitcoin
+  var r = c0_lo ^ c1_lo ^ c2_lo;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
+}
 
-  var hash = magicHash(message, network)
-  var parsed = ECSignature.parseCompact(signature)
-  var e = BigInteger.fromBuffer(hash)
-  var Q = ecdsa.recoverPubKey(ecparams, e, parsed.signature, parsed.i)
+function g1_512_hi(xh, xl) {
+  var c0_hi = rotr64_hi(xh, xl, 19);
+  var c1_hi = rotr64_hi(xl, xh, 29);  // 61
+  var c2_hi = shr64_hi(xh, xl, 6);
 
-  var pubKey = new ECPubKey(Q, parsed.compressed)
-  return pubKey.getAddress(network).toString() === address.toString()
+  var r = c0_hi ^ c1_hi ^ c2_hi;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
 }
 
-module.exports = {
-  magicHash: magicHash,
-  sign: sign,
-  verify: verify
+function g1_512_lo(xh, xl) {
+  var c0_lo = rotr64_lo(xh, xl, 19);
+  var c1_lo = rotr64_lo(xl, xh, 29);  // 61
+  var c2_lo = shr64_lo(xh, xl, 6);
+
+  var r = c0_lo ^ c1_lo ^ c2_lo;
+  if (r < 0)
+    r += 0x100000000;
+  return r;
 }
 
-}).call(this,require("buffer").Buffer)
-},{"./bufferutils":57,"./crypto":58,"./ecdsa":59,"./ecpubkey":61,"./ecsignature":62,"./networks":66,"bigi":3,"buffer":7,"ecurve":49}],66:[function(require,module,exports){
-// https://en.bitcoin.it/wiki/List_of_address_prefixes
-// Dogecoin BIP32 is a proposed standard: https://bitcointalk.org/index.php?topic=409731
+},{"../hash":57}],62:[function(require,module,exports){
+var utils = exports;
+var inherits = require('inherits');
 
-var networks = {
-  bitcoin: {
-    magicPrefix: '\x18Bitcoin Signed Message:\n',
-    bip32: {
-      public: 0x0488b21e,
-      private: 0x0488ade4
-    },
-    pubKeyHash: 0x00,
-    scriptHash: 0x05,
-    wif: 0x80,
-    dustThreshold: 546, // https://github.com/bitcoin/bitcoin/blob/v0.9.2/src/core.h#L151-L162
-    feePerKb: 10000, // https://github.com/bitcoin/bitcoin/blob/v0.9.2/src/main.cpp#L53
-    estimateFee: estimateFee('bitcoin')
-  },
-  testnet: {
-    magicPrefix: '\x18Bitcoin Signed Message:\n',
-    bip32: {
-      public: 0x043587cf,
-      private: 0x04358394
-    },
-    pubKeyHash: 0x6f,
-    scriptHash: 0xc4,
-    wif: 0xef,
-    dustThreshold: 546,
-    feePerKb: 10000,
-    estimateFee: estimateFee('testnet')
-  },
-  litecoin: {
-    magicPrefix: '\x19Litecoin Signed Message:\n',
-    bip32: {
-      public: 0x019da462,
-      private: 0x019d9cfe
-    },
-    pubKeyHash: 0x30,
-    scriptHash: 0x05,
-    wif: 0xb0,
-    dustThreshold: 0, // https://github.com/litecoin-project/litecoin/blob/v0.8.7.2/src/main.cpp#L360-L365
-    dustSoftThreshold: 100000, // https://github.com/litecoin-project/litecoin/blob/v0.8.7.2/src/main.h#L53
-    feePerKb: 100000, // https://github.com/litecoin-project/litecoin/blob/v0.8.7.2/src/main.cpp#L56
-    estimateFee: estimateFee('litecoin')
-  },
-  dogecoin: {
-    magicPrefix: '\x19Dogecoin Signed Message:\n',
-    bip32: {
-      public: 0x02facafd,
-      private: 0x02fac398
-    },
-    pubKeyHash: 0x1e,
-    scriptHash: 0x16,
-    wif: 0x9e,
-    dustThreshold: 0, // https://github.com/dogecoin/dogecoin/blob/v1.7.1/src/core.h#L155-L160
-    dustSoftThreshold: 100000000, // https://github.com/dogecoin/dogecoin/blob/v1.7.1/src/main.h#L62
-    feePerKb: 100000000, // https://github.com/dogecoin/dogecoin/blob/v1.7.1/src/main.cpp#L58
-    estimateFee: estimateFee('dogecoin')
-  },
-  viacoin: {
-    magicPrefix: '\x18Viacoin Signed Message:\n',
-    bip32: {
-      public: 0x0488b21e,
-      private: 0x0488ade4
-    },
-    pubKeyHash: 0x47,
-    scriptHash: 0x21,
-    wif: 0xc7,
-    dustThreshold: 560,
-    dustSoftThreshold: 100000,
-    feePerKb: 100000, //
-    estimateFee: estimateFee('viacoin')
-  },
-  viacointestnet: {
-    magicPrefix: '\x18Viacoin Signed Message:\n',
-    bip32: {
-      public: 0x043587cf,
-      private: 0x04358394
-    },
-    pubKeyHash: 0x7f,
-    scriptHash: 0xc4,
-    wif: 0xff,
-    dustThreshold: 560,
-    dustSoftThreshold: 100000,
-    feePerKb: 100000,
-    estimateFee: estimateFee('viacointestnet')
-  },
-  gamerscoin: {
-    magicPrefix: '\x19Gamerscoin Signed Message:\n',
-    bip32: {
-      public: 0x019da462,
-      private: 0x019d9cfe
-    },
-    pubKeyHash: 0x26,
-    scriptHash: 0x05,
-    wif: 0xA6,
-    dustThreshold: 0, // https://github.com/gamers-coin/gamers-coinv3/blob/master/src/main.cpp#L358-L363
-    dustSoftThreshold: 100000, // https://github.com/gamers-coin/gamers-coinv3/blob/master/src/main.cpp#L51
-    feePerKb: 100000, // https://github.com/gamers-coin/gamers-coinv3/blob/master/src/main.cpp#L54
-    estimateFee: estimateFee('gamerscoin')
-  },
-  jumbucks: {
-    magicPrefix: '\x19Jumbucks Signed Message:\n',
-    bip32: {
-      public: 0x037a689a,
-      private: 0x037a6460
-    },
-    pubKeyHash: 0x2b,
-    scriptHash: 0x05,
-    wif: 0xab,
-    dustThreshold: 0,
-    dustSoftThreshold: 10000,
-    feePerKb: 10000,
-    estimateFee: estimateFee('jumbucks')
-  },
-  zetacoin: {
-    magicPrefix: '\x18Zetacoin Signed Message:\n',
-    bip32: {
-      public: 0x0488b21e,
-      private: 0x0488ade4
-    },
-    pubKeyHash: 0x50,
-    scriptHash: 0x09,
-    wif: 0xe0,
-    dustThreshold: 546, // https://github.com/zetacoin/zetacoin/blob/master/src/core.h#L159
-    feePerKb: 10000, // https://github.com/zetacoin/zetacoin/blob/master/src/main.cpp#L54
-    estimateFee: estimateFee('zetacoin')
+function toArray(msg, enc) {
+  if (Array.isArray(msg))
+    return msg.slice();
+  if (!msg)
+    return [];
+  var res = [];
+  if (typeof msg === 'string') {
+    if (!enc) {
+      for (var i = 0; i < msg.length; i++) {
+        var c = msg.charCodeAt(i);
+        var hi = c >> 8;
+        var lo = c & 0xff;
+        if (hi)
+          res.push(hi, lo);
+        else
+          res.push(lo);
+      }
+    } else if (enc === 'hex') {
+      msg = msg.replace(/[^a-z0-9]+/ig, '');
+      if (msg.length % 2 !== 0)
+        msg = '0' + msg;
+      for (var i = 0; i < msg.length; i += 2)
+        res.push(parseInt(msg[i] + msg[i + 1], 16));
+    }
+  } else {
+    for (var i = 0; i < msg.length; i++)
+      res[i] = msg[i] | 0;
   }
+  return res;
 }
+utils.toArray = toArray;
 
-function estimateFee (type) {
-  return function (tx) {
-    var network = networks[type]
-    var baseFee = network.feePerKb
-    var byteSize = tx.toBuffer().length
+function toHex(msg) {
+  var res = '';
+  for (var i = 0; i < msg.length; i++)
+    res += zero2(msg[i].toString(16));
+  return res;
+}
+utils.toHex = toHex;
 
-    var fee = baseFee * Math.ceil(byteSize / 1000)
-    if (network.dustSoftThreshold === undefined) return fee
+function htonl(w) {
+  var res = (w >>> 24) |
+            ((w >>> 8) & 0xff00) |
+            ((w << 8) & 0xff0000) |
+            ((w & 0xff) << 24);
+  return res >>> 0;
+}
+utils.htonl = htonl;
 
-    tx.outs.forEach(function (e) {
-      if (e.value < network.dustSoftThreshold) {
-        fee += baseFee
-      }
-    })
+function toHex32(msg, endian) {
+  var res = '';
+  for (var i = 0; i < msg.length; i++) {
+    var w = msg[i];
+    if (endian === 'little')
+      w = htonl(w);
+    res += zero8(w.toString(16));
+  }
+  return res;
+}
+utils.toHex32 = toHex32;
 
-    return fee
+function zero2(word) {
+  if (word.length === 1)
+    return '0' + word;
+  else
+    return word;
+}
+utils.zero2 = zero2;
+
+function zero8(word) {
+  if (word.length === 7)
+    return '0' + word;
+  else if (word.length === 6)
+    return '00' + word;
+  else if (word.length === 5)
+    return '000' + word;
+  else if (word.length === 4)
+    return '0000' + word;
+  else if (word.length === 3)
+    return '00000' + word;
+  else if (word.length === 2)
+    return '000000' + word;
+  else if (word.length === 1)
+    return '0000000' + word;
+  else
+    return word;
+}
+utils.zero8 = zero8;
+
+function join32(msg, start, end, endian) {
+  var len = end - start;
+  assert(len % 4 === 0);
+  var res = new Array(len / 4);
+  for (var i = 0, k = start; i < res.length; i++, k += 4) {
+    var w;
+    if (endian === 'big')
+      w = (msg[k] << 24) | (msg[k + 1] << 16) | (msg[k + 2] << 8) | msg[k + 3];
+    else
+      w = (msg[k + 3] << 24) | (msg[k + 2] << 16) | (msg[k + 1] << 8) | msg[k];
+    res[i] = w >>> 0;
+  }
+  return res;
+}
+utils.join32 = join32;
+
+function split32(msg, endian) {
+  var res = new Array(msg.length * 4);
+  for (var i = 0, k = 0; i < msg.length; i++, k += 4) {
+    var m = msg[i];
+    if (endian === 'big') {
+      res[k] = m >>> 24;
+      res[k + 1] = (m >>> 16) & 0xff;
+      res[k + 2] = (m >>> 8) & 0xff;
+      res[k + 3] = m & 0xff;
+    } else {
+      res[k + 3] = m >>> 24;
+      res[k + 2] = (m >>> 16) & 0xff;
+      res[k + 1] = (m >>> 8) & 0xff;
+      res[k] = m & 0xff;
+    }
   }
+  return res;
 }
+utils.split32 = split32;
 
-module.exports = networks
+function rotr32(w, b) {
+  return (w >>> b) | (w << (32 - b));
+}
+utils.rotr32 = rotr32;
 
-},{}],67:[function(require,module,exports){
-module.exports = {
-  // push value
-  OP_FALSE: 0,
-  OP_0: 0,
-  OP_PUSHDATA1: 76,
-  OP_PUSHDATA2: 77,
-  OP_PUSHDATA4: 78,
-  OP_1NEGATE: 79,
-  OP_RESERVED: 80,
-  OP_1: 81,
-  OP_TRUE: 81,
-  OP_2: 82,
-  OP_3: 83,
-  OP_4: 84,
-  OP_5: 85,
-  OP_6: 86,
-  OP_7: 87,
-  OP_8: 88,
-  OP_9: 89,
-  OP_10: 90,
-  OP_11: 91,
-  OP_12: 92,
-  OP_13: 93,
-  OP_14: 94,
-  OP_15: 95,
-  OP_16: 96,
+function rotl32(w, b) {
+  return (w << b) | (w >>> (32 - b));
+}
+utils.rotl32 = rotl32;
+
+function sum32(a, b) {
+  return (a + b) >>> 0;
+}
+utils.sum32 = sum32;
+
+function sum32_3(a, b, c) {
+  return (a + b + c) >>> 0;
+}
+utils.sum32_3 = sum32_3;
+
+function sum32_4(a, b, c, d) {
+  return (a + b + c + d) >>> 0;
+}
+utils.sum32_4 = sum32_4;
+
+function sum32_5(a, b, c, d, e) {
+  return (a + b + c + d + e) >>> 0;
+}
+utils.sum32_5 = sum32_5;
+
+function assert(cond, msg) {
+  if (!cond)
+    throw new Error(msg || 'Assertion failed');
+}
+utils.assert = assert;
+
+utils.inherits = inherits;
+
+function sum64(buf, pos, ah, al) {
+  var bh = buf[pos];
+  var bl = buf[pos + 1];
+
+  var lo = (al + bl) >>> 0;
+  var hi = (lo < al ? 1 : 0) + ah + bh;
+  buf[pos] = hi >>> 0;
+  buf[pos + 1] = lo;
+}
+exports.sum64 = sum64;
+
+function sum64_hi(ah, al, bh, bl) {
+  var lo = (al + bl) >>> 0;
+  var hi = (lo < al ? 1 : 0) + ah + bh;
+  return hi >>> 0;
+};
+exports.sum64_hi = sum64_hi;
 
-  // control
-  OP_NOP: 97,
-  OP_VER: 98,
-  OP_IF: 99,
-  OP_NOTIF: 100,
-  OP_VERIF: 101,
-  OP_VERNOTIF: 102,
-  OP_ELSE: 103,
-  OP_ENDIF: 104,
-  OP_VERIFY: 105,
-  OP_RETURN: 106,
+function sum64_lo(ah, al, bh, bl) {
+  var lo = al + bl;
+  return lo >>> 0;
+};
+exports.sum64_lo = sum64_lo;
+
+function sum64_4_hi(ah, al, bh, bl, ch, cl, dh, dl) {
+  var carry = 0;
+  var lo = al;
+  lo = (lo + bl) >>> 0;
+  carry += lo < al ? 1 : 0;
+  lo = (lo + cl) >>> 0;
+  carry += lo < cl ? 1 : 0;
+  lo = (lo + dl) >>> 0;
+  carry += lo < dl ? 1 : 0;
+
+  var hi = ah + bh + ch + dh + carry;
+  return hi >>> 0;
+};
+exports.sum64_4_hi = sum64_4_hi;
 
-  // stack ops
-  OP_TOALTSTACK: 107,
-  OP_FROMALTSTACK: 108,
-  OP_2DROP: 109,
-  OP_2DUP: 110,
-  OP_3DUP: 111,
-  OP_2OVER: 112,
-  OP_2ROT: 113,
-  OP_2SWAP: 114,
-  OP_IFDUP: 115,
-  OP_DEPTH: 116,
-  OP_DROP: 117,
-  OP_DUP: 118,
-  OP_NIP: 119,
-  OP_OVER: 120,
-  OP_PICK: 121,
-  OP_ROLL: 122,
-  OP_ROT: 123,
-  OP_SWAP: 124,
-  OP_TUCK: 125,
+function sum64_4_lo(ah, al, bh, bl, ch, cl, dh, dl) {
+  var lo = al + bl + cl + dl;
+  return lo >>> 0;
+};
+exports.sum64_4_lo = sum64_4_lo;
+
+function sum64_5_hi(ah, al, bh, bl, ch, cl, dh, dl, eh, el) {
+  var carry = 0;
+  var lo = al;
+  lo = (lo + bl) >>> 0;
+  carry += lo < al ? 1 : 0;
+  lo = (lo + cl) >>> 0;
+  carry += lo < cl ? 1 : 0;
+  lo = (lo + dl) >>> 0;
+  carry += lo < dl ? 1 : 0;
+  lo = (lo + el) >>> 0;
+  carry += lo < el ? 1 : 0;
+
+  var hi = ah + bh + ch + dh + eh + carry;
+  return hi >>> 0;
+};
+exports.sum64_5_hi = sum64_5_hi;
 
-  // splice ops
-  OP_CAT: 126,
-  OP_SUBSTR: 127,
-  OP_LEFT: 128,
-  OP_RIGHT: 129,
-  OP_SIZE: 130,
+function sum64_5_lo(ah, al, bh, bl, ch, cl, dh, dl, eh, el) {
+  var lo = al + bl + cl + dl + el;
 
-  // bit logic
-  OP_INVERT: 131,
-  OP_AND: 132,
-  OP_OR: 133,
-  OP_XOR: 134,
-  OP_EQUAL: 135,
-  OP_EQUALVERIFY: 136,
-  OP_RESERVED1: 137,
-  OP_RESERVED2: 138,
+  return lo >>> 0;
+};
+exports.sum64_5_lo = sum64_5_lo;
 
-  // numeric
-  OP_1ADD: 139,
-  OP_1SUB: 140,
-  OP_2MUL: 141,
-  OP_2DIV: 142,
-  OP_NEGATE: 143,
-  OP_ABS: 144,
-  OP_NOT: 145,
-  OP_0NOTEQUAL: 146,
+function rotr64_hi(ah, al, num) {
+  var r = (al << (32 - num)) | (ah >>> num);
+  return r >>> 0;
+};
+exports.rotr64_hi = rotr64_hi;
 
-  OP_ADD: 147,
-  OP_SUB: 148,
-  OP_MUL: 149,
-  OP_DIV: 150,
-  OP_MOD: 151,
-  OP_LSHIFT: 152,
-  OP_RSHIFT: 153,
+function rotr64_lo(ah, al, num) {
+  var r = (ah << (32 - num)) | (al >>> num);
+  return r >>> 0;
+};
+exports.rotr64_lo = rotr64_lo;
 
-  OP_BOOLAND: 154,
-  OP_BOOLOR: 155,
-  OP_NUMEQUAL: 156,
-  OP_NUMEQUALVERIFY: 157,
-  OP_NUMNOTEQUAL: 158,
-  OP_LESSTHAN: 159,
-  OP_GREATERTHAN: 160,
-  OP_LESSTHANOREQUAL: 161,
-  OP_GREATERTHANOREQUAL: 162,
-  OP_MIN: 163,
-  OP_MAX: 164,
+function shr64_hi(ah, al, num) {
+  return ah >>> num;
+};
+exports.shr64_hi = shr64_hi;
 
-  OP_WITHIN: 165,
+function shr64_lo(ah, al, num) {
+  var r = (ah << (32 - num)) | (al >>> num);
+  return r >>> 0;
+};
+exports.shr64_lo = shr64_lo;
 
-  // crypto
-  OP_RIPEMD160: 166,
-  OP_SHA1: 167,
-  OP_SHA256: 168,
-  OP_HASH160: 169,
-  OP_HASH256: 170,
-  OP_CODESEPARATOR: 171,
-  OP_CHECKSIG: 172,
-  OP_CHECKSIGVERIFY: 173,
-  OP_CHECKMULTISIG: 174,
-  OP_CHECKMULTISIGVERIFY: 175,
+},{"inherits":63}],63:[function(require,module,exports){
+arguments[4][9][0].apply(exports,arguments)
+},{"dup":9}],64:[function(require,module,exports){
+/**
+ * Returns a `Boolean` on whether or not the a `String` starts with '0x'
+ * @param {String} str the string input value
+ * @return {Boolean} a boolean if it is or is not hex prefixed
+ * @throws if the str input is not a string
+ */
+module.exports = function isHexPrefixed(str) {
+  if (typeof str !== 'string') {
+    throw new Error("[is-hex-prefixed] value must be type 'string', is currently type " + (typeof str) + ", while checking isHexPrefixed.");
+  }
 
-  // expansion
-  OP_NOP1: 176,
-  OP_NOP2: 177,
-  OP_NOP3: 178,
-  OP_NOP4: 179,
-  OP_NOP5: 180,
-  OP_NOP6: 181,
-  OP_NOP7: 182,
-  OP_NOP8: 183,
-  OP_NOP9: 184,
-  OP_NOP10: 185,
+  return str.slice(0, 2) === '0x';
+}
 
-  // template matching params
-  OP_PUBKEYHASH: 253,
-  OP_PUBKEY: 254,
-  OP_INVALIDOPCODE: 255
+},{}],65:[function(require,module,exports){
+'use strict'
+module.exports = require('./lib/api')(require('./lib/keccak'))
+
+},{"./lib/api":66,"./lib/keccak":70}],66:[function(require,module,exports){
+'use strict'
+var createKeccak = require('./keccak')
+var createShake = require('./shake')
+
+module.exports = function (KeccakState) {
+  var Keccak = createKeccak(KeccakState)
+  var Shake = createShake(KeccakState)
+
+  return function (algorithm, options) {
+    var hash = typeof algorithm === 'string' ? algorithm.toLowerCase() : algorithm
+    switch (hash) {
+      case 'keccak224': return new Keccak(1152, 448, null, 224, options)
+      case 'keccak256': return new Keccak(1088, 512, null, 256, options)
+      case 'keccak384': return new Keccak(832, 768, null, 384, options)
+      case 'keccak512': return new Keccak(576, 1024, null, 512, options)
+
+      case 'sha3-224': return new Keccak(1152, 448, 0x06, 224, options)
+      case 'sha3-256': return new Keccak(1088, 512, 0x06, 256, options)
+      case 'sha3-384': return new Keccak(832, 768, 0x06, 384, options)
+      case 'sha3-512': return new Keccak(576, 1024, 0x06, 512, options)
+
+      case 'shake128': return new Shake(1344, 256, 0x1f, options)
+      case 'shake256': return new Shake(1088, 512, 0x1f, options)
+
+      default: throw new Error('Invald algorithm: ' + algorithm)
+    }
+  }
 }
 
-},{}],68:[function(require,module,exports){
+},{"./keccak":67,"./shake":68}],67:[function(require,module,exports){
 (function (Buffer){
-var assert = require('assert')
-var bufferutils = require('./bufferutils')
-var crypto = require('./crypto')
-var typeForce = require('typeforce')
-var opcodes = require('./opcodes')
+'use strict'
+var Transform = require('stream').Transform
+var inherits = require('inherits')
 
-function Script (buffer, chunks) {
-  typeForce('Buffer', buffer)
-  typeForce('Array', chunks)
+module.exports = function (KeccakState) {
+  function Keccak (rate, capacity, delimitedSuffix, hashBitLength, options) {
+    Transform.call(this, options)
 
-  this.buffer = buffer
-  this.chunks = chunks
-}
+    this._rate = rate
+    this._capacity = capacity
+    this._delimitedSuffix = delimitedSuffix
+    this._hashBitLength = hashBitLength
+    this._options = options
 
-Script.fromASM = function (asm) {
-  var strChunks = asm.split(' ')
-  var chunks = strChunks.map(function (strChunk) {
-    // opcode
-    if (strChunk in opcodes) {
-      return opcodes[strChunk]
+    this._state = new KeccakState()
+    this._state.initialize(rate, capacity)
+    this._finalized = false
+  }
 
-    // data chunk
-    } else {
-      return new Buffer(strChunk, 'hex')
+  inherits(Keccak, Transform)
+
+  Keccak.prototype._transform = function (chunk, encoding, callback) {
+    var error = null
+    try {
+      this.update(chunk, encoding)
+    } catch (err) {
+      error = err
     }
-  })
 
-  return Script.fromChunks(chunks)
-}
+    callback(error)
+  }
 
-Script.fromBuffer = function (buffer) {
-  var chunks = []
-  var i = 0
+  Keccak.prototype._flush = function (callback) {
+    var error = null
+    try {
+      this.push(this.digest())
+    } catch (err) {
+      error = err
+    }
 
-  while (i < buffer.length) {
-    var opcode = buffer.readUInt8(i)
+    callback(error)
+  }
 
-    // data chunk
-    if ((opcode > opcodes.OP_0) && (opcode <= opcodes.OP_PUSHDATA4)) {
-      var d = bufferutils.readPushDataInt(buffer, i)
+  Keccak.prototype.update = function (data, encoding) {
+    if (!Buffer.isBuffer(data) && typeof data !== 'string') throw new TypeError('Data must be a string or a buffer')
+    if (this._finalized) throw new Error('Digest already called')
+    if (!Buffer.isBuffer(data)) data = Buffer.from(data, encoding)
 
-      // did reading a pushDataInt fail? return non-chunked script
-      if (d === null) return new Script(buffer, [])
-      i += d.size
+    this._state.absorb(data)
 
-      // attempt to read too much data?
-      if (i + d.number > buffer.length) return new Script(buffer, [])
+    return this
+  }
 
-      var data = buffer.slice(i, i + d.number)
-      i += d.number
+  Keccak.prototype.digest = function (encoding) {
+    if (this._finalized) throw new Error('Digest already called')
+    this._finalized = true
 
-      chunks.push(data)
+    if (this._delimitedSuffix) this._state.absorbLastFewBits(this._delimitedSuffix)
+    var digest = this._state.squeeze(this._hashBitLength / 8)
+    if (encoding !== undefined) digest = digest.toString(encoding)
 
-    // opcode
-    } else {
-      chunks.push(opcode)
+    this._resetState()
 
-      i += 1
-    }
+    return digest
   }
 
-  return new Script(buffer, chunks)
+  // remove result from memory
+  Keccak.prototype._resetState = function () {
+    this._state.initialize(this._rate, this._capacity)
+    return this
+  }
+
+  // because sometimes we need hash right now and little later
+  Keccak.prototype._clone = function () {
+    var clone = new Keccak(this._rate, this._capacity, this._delimitedSuffix, this._hashBitLength, this._options)
+    this._state.copy(clone._state)
+    clone._finalized = this._finalized
+
+    return clone
+  }
+
+  return Keccak
 }
 
-Script.fromChunks = function (chunks) {
-  typeForce('Array', chunks)
+}).call(this,require("buffer").Buffer)
+},{"buffer":5,"inherits":63,"stream":25}],68:[function(require,module,exports){
+(function (Buffer){
+'use strict'
+var Transform = require('stream').Transform
+var inherits = require('inherits')
 
-  var bufferSize = chunks.reduce(function (accum, chunk) {
-    // data chunk
-    if (Buffer.isBuffer(chunk)) {
-      return accum + bufferutils.pushDataSize(chunk.length) + chunk.length
+module.exports = function (KeccakState) {
+  function Shake (rate, capacity, delimitedSuffix, options) {
+    Transform.call(this, options)
+
+    this._rate = rate
+    this._capacity = capacity
+    this._delimitedSuffix = delimitedSuffix
+    this._options = options
+
+    this._state = new KeccakState()
+    this._state.initialize(rate, capacity)
+    this._finalized = false
+  }
+
+  inherits(Shake, Transform)
+
+  Shake.prototype._transform = function (chunk, encoding, callback) {
+    var error = null
+    try {
+      this.update(chunk, encoding)
+    } catch (err) {
+      error = err
     }
 
-    // opcode
-    return accum + 1
-  }, 0.0)
+    callback(error)
+  }
 
-  var buffer = new Buffer(bufferSize)
-  var offset = 0
+  Shake.prototype._flush = function () {}
 
-  chunks.forEach(function (chunk) {
-    // data chunk
-    if (Buffer.isBuffer(chunk)) {
-      offset += bufferutils.writePushDataInt(buffer, chunk.length, offset)
+  Shake.prototype._read = function (size) {
+    this.push(this.squeeze(size))
+  }
 
-      chunk.copy(buffer, offset)
-      offset += chunk.length
+  Shake.prototype.update = function (data, encoding) {
+    if (!Buffer.isBuffer(data) && typeof data !== 'string') throw new TypeError('Data must be a string or a buffer')
+    if (this._finalized) throw new Error('Squeeze already called')
+    if (!Buffer.isBuffer(data)) data = Buffer.from(data, encoding)
 
-    // opcode
-    } else {
-      buffer.writeUInt8(chunk, offset)
-      offset += 1
+    this._state.absorb(data)
+
+    return this
+  }
+
+  Shake.prototype.squeeze = function (dataByteLength, encoding) {
+    if (!this._finalized) {
+      this._finalized = true
+      this._state.absorbLastFewBits(this._delimitedSuffix)
     }
-  })
 
-  assert.equal(offset, buffer.length, 'Could not decode chunks')
-  return new Script(buffer, chunks)
-}
+    var data = this._state.squeeze(dataByteLength)
+    if (encoding !== undefined) data = data.toString(encoding)
 
-Script.fromHex = function (hex) {
-  return Script.fromBuffer(new Buffer(hex, 'hex'))
+    return data
+  }
+
+  Shake.prototype._resetState = function () {
+    this._state.initialize(this._rate, this._capacity)
+    return this
+  }
+
+  Shake.prototype._clone = function () {
+    var clone = new Shake(this._rate, this._capacity, this._delimitedSuffix, this._options)
+    this._state.copy(clone._state)
+    clone._finalized = this._finalized
+
+    return clone
+  }
+
+  return Shake
 }
 
-Script.EMPTY = Script.fromChunks([])
+}).call(this,require("buffer").Buffer)
+},{"buffer":5,"inherits":63,"stream":25}],69:[function(require,module,exports){
+'use strict'
+var P1600_ROUND_CONSTANTS = [1, 0, 32898, 0, 32906, 2147483648, 2147516416, 2147483648, 32907, 0, 2147483649, 0, 2147516545, 2147483648, 32777, 2147483648, 138, 0, 136, 0, 2147516425, 0, 2147483658, 0, 2147516555, 0, 139, 2147483648, 32905, 2147483648, 32771, 2147483648, 32770, 2147483648, 128, 2147483648, 32778, 0, 2147483658, 2147483648, 2147516545, 2147483648, 32896, 2147483648, 2147483649, 0, 2147516424, 2147483648]
+
+exports.p1600 = function (s) {
+  for (var round = 0; round < 24; ++round) {
+    // theta
+    var lo0 = s[0] ^ s[10] ^ s[20] ^ s[30] ^ s[40]
+    var hi0 = s[1] ^ s[11] ^ s[21] ^ s[31] ^ s[41]
+    var lo1 = s[2] ^ s[12] ^ s[22] ^ s[32] ^ s[42]
+    var hi1 = s[3] ^ s[13] ^ s[23] ^ s[33] ^ s[43]
+    var lo2 = s[4] ^ s[14] ^ s[24] ^ s[34] ^ s[44]
+    var hi2 = s[5] ^ s[15] ^ s[25] ^ s[35] ^ s[45]
+    var lo3 = s[6] ^ s[16] ^ s[26] ^ s[36] ^ s[46]
+    var hi3 = s[7] ^ s[17] ^ s[27] ^ s[37] ^ s[47]
+    var lo4 = s[8] ^ s[18] ^ s[28] ^ s[38] ^ s[48]
+    var hi4 = s[9] ^ s[19] ^ s[29] ^ s[39] ^ s[49]
+
+    var lo = lo4 ^ (lo1 << 1 | hi1 >>> 31)
+    var hi = hi4 ^ (hi1 << 1 | lo1 >>> 31)
+    var t1slo0 = s[0] ^ lo
+    var t1shi0 = s[1] ^ hi
+    var t1slo5 = s[10] ^ lo
+    var t1shi5 = s[11] ^ hi
+    var t1slo10 = s[20] ^ lo
+    var t1shi10 = s[21] ^ hi
+    var t1slo15 = s[30] ^ lo
+    var t1shi15 = s[31] ^ hi
+    var t1slo20 = s[40] ^ lo
+    var t1shi20 = s[41] ^ hi
+    lo = lo0 ^ (lo2 << 1 | hi2 >>> 31)
+    hi = hi0 ^ (hi2 << 1 | lo2 >>> 31)
+    var t1slo1 = s[2] ^ lo
+    var t1shi1 = s[3] ^ hi
+    var t1slo6 = s[12] ^ lo
+    var t1shi6 = s[13] ^ hi
+    var t1slo11 = s[22] ^ lo
+    var t1shi11 = s[23] ^ hi
+    var t1slo16 = s[32] ^ lo
+    var t1shi16 = s[33] ^ hi
+    var t1slo21 = s[42] ^ lo
+    var t1shi21 = s[43] ^ hi
+    lo = lo1 ^ (lo3 << 1 | hi3 >>> 31)
+    hi = hi1 ^ (hi3 << 1 | lo3 >>> 31)
+    var t1slo2 = s[4] ^ lo
+    var t1shi2 = s[5] ^ hi
+    var t1slo7 = s[14] ^ lo
+    var t1shi7 = s[15] ^ hi
+    var t1slo12 = s[24] ^ lo
+    var t1shi12 = s[25] ^ hi
+    var t1slo17 = s[34] ^ lo
+    var t1shi17 = s[35] ^ hi
+    var t1slo22 = s[44] ^ lo
+    var t1shi22 = s[45] ^ hi
+    lo = lo2 ^ (lo4 << 1 | hi4 >>> 31)
+    hi = hi2 ^ (hi4 << 1 | lo4 >>> 31)
+    var t1slo3 = s[6] ^ lo
+    var t1shi3 = s[7] ^ hi
+    var t1slo8 = s[16] ^ lo
+    var t1shi8 = s[17] ^ hi
+    var t1slo13 = s[26] ^ lo
+    var t1shi13 = s[27] ^ hi
+    var t1slo18 = s[36] ^ lo
+    var t1shi18 = s[37] ^ hi
+    var t1slo23 = s[46] ^ lo
+    var t1shi23 = s[47] ^ hi
+    lo = lo3 ^ (lo0 << 1 | hi0 >>> 31)
+    hi = hi3 ^ (hi0 << 1 | lo0 >>> 31)
+    var t1slo4 = s[8] ^ lo
+    var t1shi4 = s[9] ^ hi
+    var t1slo9 = s[18] ^ lo
+    var t1shi9 = s[19] ^ hi
+    var t1slo14 = s[28] ^ lo
+    var t1shi14 = s[29] ^ hi
+    var t1slo19 = s[38] ^ lo
+    var t1shi19 = s[39] ^ hi
+    var t1slo24 = s[48] ^ lo
+    var t1shi24 = s[49] ^ hi
+
+    // rho & pi
+    var t2slo0 = t1slo0
+    var t2shi0 = t1shi0
+    var t2slo16 = (t1shi5 << 4 | t1slo5 >>> 28)
+    var t2shi16 = (t1slo5 << 4 | t1shi5 >>> 28)
+    var t2slo7 = (t1slo10 << 3 | t1shi10 >>> 29)
+    var t2shi7 = (t1shi10 << 3 | t1slo10 >>> 29)
+    var t2slo23 = (t1shi15 << 9 | t1slo15 >>> 23)
+    var t2shi23 = (t1slo15 << 9 | t1shi15 >>> 23)
+    var t2slo14 = (t1slo20 << 18 | t1shi20 >>> 14)
+    var t2shi14 = (t1shi20 << 18 | t1slo20 >>> 14)
+    var t2slo10 = (t1slo1 << 1 | t1shi1 >>> 31)
+    var t2shi10 = (t1shi1 << 1 | t1slo1 >>> 31)
+    var t2slo1 = (t1shi6 << 12 | t1slo6 >>> 20)
+    var t2shi1 = (t1slo6 << 12 | t1shi6 >>> 20)
+    var t2slo17 = (t1slo11 << 10 | t1shi11 >>> 22)
+    var t2shi17 = (t1shi11 << 10 | t1slo11 >>> 22)
+    var t2slo8 = (t1shi16 << 13 | t1slo16 >>> 19)
+    var t2shi8 = (t1slo16 << 13 | t1shi16 >>> 19)
+    var t2slo24 = (t1slo21 << 2 | t1shi21 >>> 30)
+    var t2shi24 = (t1shi21 << 2 | t1slo21 >>> 30)
+    var t2slo20 = (t1shi2 << 30 | t1slo2 >>> 2)
+    var t2shi20 = (t1slo2 << 30 | t1shi2 >>> 2)
+    var t2slo11 = (t1slo7 << 6 | t1shi7 >>> 26)
+    var t2shi11 = (t1shi7 << 6 | t1slo7 >>> 26)
+    var t2slo2 = (t1shi12 << 11 | t1slo12 >>> 21)
+    var t2shi2 = (t1slo12 << 11 | t1shi12 >>> 21)
+    var t2slo18 = (t1slo17 << 15 | t1shi17 >>> 17)
+    var t2shi18 = (t1shi17 << 15 | t1slo17 >>> 17)
+    var t2slo9 = (t1shi22 << 29 | t1slo22 >>> 3)
+    var t2shi9 = (t1slo22 << 29 | t1shi22 >>> 3)
+    var t2slo5 = (t1slo3 << 28 | t1shi3 >>> 4)
+    var t2shi5 = (t1shi3 << 28 | t1slo3 >>> 4)
+    var t2slo21 = (t1shi8 << 23 | t1slo8 >>> 9)
+    var t2shi21 = (t1slo8 << 23 | t1shi8 >>> 9)
+    var t2slo12 = (t1slo13 << 25 | t1shi13 >>> 7)
+    var t2shi12 = (t1shi13 << 25 | t1slo13 >>> 7)
+    var t2slo3 = (t1slo18 << 21 | t1shi18 >>> 11)
+    var t2shi3 = (t1shi18 << 21 | t1slo18 >>> 11)
+    var t2slo19 = (t1shi23 << 24 | t1slo23 >>> 8)
+    var t2shi19 = (t1slo23 << 24 | t1shi23 >>> 8)
+    var t2slo15 = (t1slo4 << 27 | t1shi4 >>> 5)
+    var t2shi15 = (t1shi4 << 27 | t1slo4 >>> 5)
+    var t2slo6 = (t1slo9 << 20 | t1shi9 >>> 12)
+    var t2shi6 = (t1shi9 << 20 | t1slo9 >>> 12)
+    var t2slo22 = (t1shi14 << 7 | t1slo14 >>> 25)
+    var t2shi22 = (t1slo14 << 7 | t1shi14 >>> 25)
+    var t2slo13 = (t1slo19 << 8 | t1shi19 >>> 24)
+    var t2shi13 = (t1shi19 << 8 | t1slo19 >>> 24)
+    var t2slo4 = (t1slo24 << 14 | t1shi24 >>> 18)
+    var t2shi4 = (t1shi24 << 14 | t1slo24 >>> 18)
+
+    // chi
+    s[0] = t2slo0 ^ (~t2slo1 & t2slo2)
+    s[1] = t2shi0 ^ (~t2shi1 & t2shi2)
+    s[10] = t2slo5 ^ (~t2slo6 & t2slo7)
+    s[11] = t2shi5 ^ (~t2shi6 & t2shi7)
+    s[20] = t2slo10 ^ (~t2slo11 & t2slo12)
+    s[21] = t2shi10 ^ (~t2shi11 & t2shi12)
+    s[30] = t2slo15 ^ (~t2slo16 & t2slo17)
+    s[31] = t2shi15 ^ (~t2shi16 & t2shi17)
+    s[40] = t2slo20 ^ (~t2slo21 & t2slo22)
+    s[41] = t2shi20 ^ (~t2shi21 & t2shi22)
+    s[2] = t2slo1 ^ (~t2slo2 & t2slo3)
+    s[3] = t2shi1 ^ (~t2shi2 & t2shi3)
+    s[12] = t2slo6 ^ (~t2slo7 & t2slo8)
+    s[13] = t2shi6 ^ (~t2shi7 & t2shi8)
+    s[22] = t2slo11 ^ (~t2slo12 & t2slo13)
+    s[23] = t2shi11 ^ (~t2shi12 & t2shi13)
+    s[32] = t2slo16 ^ (~t2slo17 & t2slo18)
+    s[33] = t2shi16 ^ (~t2shi17 & t2shi18)
+    s[42] = t2slo21 ^ (~t2slo22 & t2slo23)
+    s[43] = t2shi21 ^ (~t2shi22 & t2shi23)
+    s[4] = t2slo2 ^ (~t2slo3 & t2slo4)
+    s[5] = t2shi2 ^ (~t2shi3 & t2shi4)
+    s[14] = t2slo7 ^ (~t2slo8 & t2slo9)
+    s[15] = t2shi7 ^ (~t2shi8 & t2shi9)
+    s[24] = t2slo12 ^ (~t2slo13 & t2slo14)
+    s[25] = t2shi12 ^ (~t2shi13 & t2shi14)
+    s[34] = t2slo17 ^ (~t2slo18 & t2slo19)
+    s[35] = t2shi17 ^ (~t2shi18 & t2shi19)
+    s[44] = t2slo22 ^ (~t2slo23 & t2slo24)
+    s[45] = t2shi22 ^ (~t2shi23 & t2shi24)
+    s[6] = t2slo3 ^ (~t2slo4 & t2slo0)
+    s[7] = t2shi3 ^ (~t2shi4 & t2shi0)
+    s[16] = t2slo8 ^ (~t2slo9 & t2slo5)
+    s[17] = t2shi8 ^ (~t2shi9 & t2shi5)
+    s[26] = t2slo13 ^ (~t2slo14 & t2slo10)
+    s[27] = t2shi13 ^ (~t2shi14 & t2shi10)
+    s[36] = t2slo18 ^ (~t2slo19 & t2slo15)
+    s[37] = t2shi18 ^ (~t2shi19 & t2shi15)
+    s[46] = t2slo23 ^ (~t2slo24 & t2slo20)
+    s[47] = t2shi23 ^ (~t2shi24 & t2shi20)
+    s[8] = t2slo4 ^ (~t2slo0 & t2slo1)
+    s[9] = t2shi4 ^ (~t2shi0 & t2shi1)
+    s[18] = t2slo9 ^ (~t2slo5 & t2slo6)
+    s[19] = t2shi9 ^ (~t2shi5 & t2shi6)
+    s[28] = t2slo14 ^ (~t2slo10 & t2slo11)
+    s[29] = t2shi14 ^ (~t2shi10 & t2shi11)
+    s[38] = t2slo19 ^ (~t2slo15 & t2slo16)
+    s[39] = t2shi19 ^ (~t2shi15 & t2shi16)
+    s[48] = t2slo24 ^ (~t2slo20 & t2slo21)
+    s[49] = t2shi24 ^ (~t2shi20 & t2shi21)
+
+    // iota
+    s[0] ^= P1600_ROUND_CONSTANTS[round * 2]
+    s[1] ^= P1600_ROUND_CONSTANTS[round * 2 + 1]
+  }
+}
+
+},{}],70:[function(require,module,exports){
+(function (Buffer){
+'use strict'
+var keccakState = require('./keccak-state-unroll')
 
-Script.prototype.getHash = function () {
-  return crypto.hash160(this.buffer)
+function Keccak () {
+  // much faster than `new Array(50)`
+  this.state = [
+    0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0
+  ]
+
+  this.blockSize = null
+  this.count = 0
+  this.squeezing = false
 }
 
-// FIXME: doesn't work for data chunks, maybe time to use buffertools.compare...
-Script.prototype.without = function (needle) {
-  return Script.fromChunks(this.chunks.filter(function (op) {
-    return op !== needle
-  }))
+Keccak.prototype.initialize = function (rate, capacity) {
+  for (var i = 0; i < 50; ++i) this.state[i] = 0
+  this.blockSize = rate / 8
+  this.count = 0
+  this.squeezing = false
 }
 
-var reverseOps = []
-for (var op in opcodes) {
-  var code = opcodes[op]
-  reverseOps[code] = op
+Keccak.prototype.absorb = function (data) {
+  for (var i = 0; i < data.length; ++i) {
+    this.state[~~(this.count / 4)] ^= data[i] << (8 * (this.count % 4))
+    this.count += 1
+    if (this.count === this.blockSize) {
+      keccakState.p1600(this.state)
+      this.count = 0
+    }
+  }
+}
+
+Keccak.prototype.absorbLastFewBits = function (bits) {
+  this.state[~~(this.count / 4)] ^= bits << (8 * (this.count % 4))
+  if ((bits & 0x80) !== 0 && this.count === (this.blockSize - 1)) keccakState.p1600(this.state)
+  this.state[~~((this.blockSize - 1) / 4)] ^= 0x80 << (8 * ((this.blockSize - 1) % 4))
+  keccakState.p1600(this.state)
+  this.count = 0
+  this.squeezing = true
 }
 
-Script.prototype.toASM = function () {
-  return this.chunks.map(function (chunk) {
-    // data chunk
-    if (Buffer.isBuffer(chunk)) {
-      return chunk.toString('hex')
+Keccak.prototype.squeeze = function (length) {
+  if (!this.squeezing) this.absorbLastFewBits(0x01)
 
-    // opcode
-    } else {
-      return reverseOps[chunk]
+  var output = Buffer.allocUnsafe(length)
+  for (var i = 0; i < length; ++i) {
+    output[i] = (this.state[~~(this.count / 4)] >>> (8 * (this.count % 4))) & 0xff
+    this.count += 1
+    if (this.count === this.blockSize) {
+      keccakState.p1600(this.state)
+      this.count = 0
     }
-  }).join(' ')
-}
+  }
 
-Script.prototype.toBuffer = function () {
-  return this.buffer
+  return output
 }
 
-Script.prototype.toHex = function () {
-  return this.toBuffer().toString('hex')
+Keccak.prototype.copy = function (dest) {
+  for (var i = 0; i < 50; ++i) dest.state[i] = this.state[i]
+  dest.blockSize = this.blockSize
+  dest.count = this.count
+  dest.squeezing = this.squeezing
 }
 
-module.exports = Script
+module.exports = Keccak
 
 }).call(this,require("buffer").Buffer)
-},{"./bufferutils":57,"./crypto":58,"./opcodes":67,"assert":5,"buffer":7,"typeforce":53}],69:[function(require,module,exports){
+},{"./keccak-state-unroll":69,"buffer":5}],71:[function(require,module,exports){
 (function (Buffer){
-var assert = require('assert')
-var ops = require('./opcodes')
-var typeForce = require('typeforce')
+/*
+CryptoJS v3.1.2
+code.google.com/p/crypto-js
+(c) 2009-2013 by Jeff Mott. All rights reserved.
+code.google.com/p/crypto-js/wiki/License
+*/
+/** @preserve
+(c) 2012 by Cédric Mesnil. All rights reserved.
 
-var ecurve = require('ecurve')
-var curve = ecurve.getCurveByName('secp256k1')
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 
-var ECSignature = require('./ecsignature')
-var Script = require('./script')
+    - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 
-function isCanonicalPubKey (buffer) {
-  if (!Buffer.isBuffer(buffer)) return false
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
 
-  try {
-    ecurve.Point.decodeFrom(curve, buffer)
-  } catch (e) {
-    if (!(e.message.match(/Invalid sequence (length|tag)/)))
-      throw e
+// constants table
+var zl = [
+  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+  7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
+  3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
+  1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
+  4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
+]
 
-    return false
+var zr = [
+  5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
+  6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
+  15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
+  8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
+  12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
+]
+
+var sl = [
+  11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
+  7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
+  11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
+  11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
+  9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
+]
+
+var sr = [
+  8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
+  9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
+  9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
+  15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
+  8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
+]
+
+var hl = [0x00000000, 0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xA953FD4E]
+var hr = [0x50A28BE6, 0x5C4DD124, 0x6D703EF3, 0x7A6D76E9, 0x00000000]
+
+function bytesToWords (bytes) {
+  var words = []
+  for (var i = 0, b = 0; i < bytes.length; i++, b += 8) {
+    words[b >>> 5] |= bytes[i] << (24 - b % 32)
   }
+  return words
+}
 
-  return true
+function wordsToBytes (words) {
+  var bytes = []
+  for (var b = 0; b < words.length * 32; b += 8) {
+    bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF)
+  }
+  return bytes
 }
 
-function isCanonicalSignature (buffer) {
-  if (!Buffer.isBuffer(buffer)) return false
+function processBlock (H, M, offset) {
+  // swap endian
+  for (var i = 0; i < 16; i++) {
+    var offset_i = offset + i
+    var M_offset_i = M[offset_i]
 
-  try {
-    ECSignature.parseScriptSignature(buffer)
-  } catch (e) {
-    if (!(e.message.match(/Not a DER sequence|Invalid sequence length|Expected a DER integer|R length is zero|S length is zero|R value excessively padded|S value excessively padded|R value is negative|S value is negative|Invalid hashType/))) {
-      throw e
+    // Swap
+    M[offset_i] = (
+      (((M_offset_i << 8) | (M_offset_i >>> 24)) & 0x00ff00ff) |
+      (((M_offset_i << 24) | (M_offset_i >>> 8)) & 0xff00ff00)
+    )
+  }
+
+  // Working variables
+  var al, bl, cl, dl, el
+  var ar, br, cr, dr, er
+
+  ar = al = H[0]
+  br = bl = H[1]
+  cr = cl = H[2]
+  dr = dl = H[3]
+  er = el = H[4]
+
+  // computation
+  var t
+  for (i = 0; i < 80; i += 1) {
+    t = (al + M[offset + zl[i]]) | 0
+    if (i < 16) {
+      t += f1(bl, cl, dl) + hl[0]
+    } else if (i < 32) {
+      t += f2(bl, cl, dl) + hl[1]
+    } else if (i < 48) {
+      t += f3(bl, cl, dl) + hl[2]
+    } else if (i < 64) {
+      t += f4(bl, cl, dl) + hl[3]
+    } else {// if (i<80) {
+      t += f5(bl, cl, dl) + hl[4]
+    }
+    t = t | 0
+    t = rotl(t, sl[i])
+    t = (t + el) | 0
+    al = el
+    el = dl
+    dl = rotl(cl, 10)
+    cl = bl
+    bl = t
+
+    t = (ar + M[offset + zr[i]]) | 0
+    if (i < 16) {
+      t += f5(br, cr, dr) + hr[0]
+    } else if (i < 32) {
+      t += f4(br, cr, dr) + hr[1]
+    } else if (i < 48) {
+      t += f3(br, cr, dr) + hr[2]
+    } else if (i < 64) {
+      t += f2(br, cr, dr) + hr[3]
+    } else {// if (i<80) {
+      t += f1(br, cr, dr) + hr[4]
     }
 
-    return false
+    t = t | 0
+    t = rotl(t, sr[i])
+    t = (t + er) | 0
+    ar = er
+    er = dr
+    dr = rotl(cr, 10)
+    cr = br
+    br = t
   }
 
-  return true
+  // intermediate hash value
+  t = (H[1] + cl + dr) | 0
+  H[1] = (H[2] + dl + er) | 0
+  H[2] = (H[3] + el + ar) | 0
+  H[3] = (H[4] + al + br) | 0
+  H[4] = (H[0] + bl + cr) | 0
+  H[0] = t
 }
 
-function isPubKeyHashInput (script) {
-  return script.chunks.length === 2 &&
-    isCanonicalSignature(script.chunks[0]) &&
-    isCanonicalPubKey(script.chunks[1])
+function f1 (x, y, z) {
+  return ((x) ^ (y) ^ (z))
 }
 
-function isPubKeyHashOutput (script) {
-  return script.chunks.length === 5 &&
-    script.chunks[0] === ops.OP_DUP &&
-    script.chunks[1] === ops.OP_HASH160 &&
-    Buffer.isBuffer(script.chunks[2]) &&
-    script.chunks[2].length === 20 &&
-    script.chunks[3] === ops.OP_EQUALVERIFY &&
-    script.chunks[4] === ops.OP_CHECKSIG
+function f2 (x, y, z) {
+  return (((x) & (y)) | ((~x) & (z)))
 }
 
-function isPubKeyInput (script) {
-  return script.chunks.length === 1 &&
-    isCanonicalSignature(script.chunks[0])
+function f3 (x, y, z) {
+  return (((x) | (~(y))) ^ (z))
 }
 
-function isPubKeyOutput (script) {
-  return script.chunks.length === 2 &&
-    isCanonicalPubKey(script.chunks[0]) &&
-    script.chunks[1] === ops.OP_CHECKSIG
+function f4 (x, y, z) {
+  return (((x) & (z)) | ((y) & (~(z))))
 }
 
-function isScriptHashInput (script, allowIncomplete) {
-  if (script.chunks.length < 2) return false
+function f5 (x, y, z) {
+  return ((x) ^ ((y) | (~(z))))
+}
 
-  var lastChunk = script.chunks[script.chunks.length - 1]
-  if (!Buffer.isBuffer(lastChunk)) return false
+function rotl (x, n) {
+  return (x << n) | (x >>> (32 - n))
+}
 
-  var scriptSig = Script.fromChunks(script.chunks.slice(0, -1))
-  var redeemScript = Script.fromBuffer(lastChunk)
+function ripemd160 (message) {
+  var H = [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0]
 
-  // is redeemScript a valid script?
-  if (redeemScript.chunks.length === 0) return false
+  if (typeof message === 'string') {
+    message = new Buffer(message, 'utf8')
+  }
 
-  return classifyInput(scriptSig, allowIncomplete) === classifyOutput(redeemScript)
-}
+  var m = bytesToWords(message)
 
-function isScriptHashOutput (script) {
-  return script.chunks.length === 3 &&
-    script.chunks[0] === ops.OP_HASH160 &&
-    Buffer.isBuffer(script.chunks[1]) &&
-    script.chunks[1].length === 20 &&
-    script.chunks[2] === ops.OP_EQUAL
-}
+  var nBitsLeft = message.length * 8
+  var nBitsTotal = message.length * 8
 
-// allowIncomplete is to account for combining signatures
-// See https://github.com/bitcoin/bitcoin/blob/f425050546644a36b0b8e0eb2f6934a3e0f6f80f/src/script/sign.cpp#L195-L197
-function isMultisigInput (script, allowIncomplete) {
-  if (script.chunks.length < 2) return false
-  if (script.chunks[0] !== ops.OP_0) return false
+  // Add padding
+  m[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32)
+  m[(((nBitsLeft + 64) >>> 9) << 4) + 14] = (
+    (((nBitsTotal << 8) | (nBitsTotal >>> 24)) & 0x00ff00ff) |
+    (((nBitsTotal << 24) | (nBitsTotal >>> 8)) & 0xff00ff00)
+  )
 
-  if (allowIncomplete) {
-    return script.chunks.slice(1).every(function (chunk) {
-      return chunk === ops.OP_0 || isCanonicalSignature(chunk)
-    })
+  for (var i = 0; i < m.length; i += 16) {
+    processBlock(H, m, i)
+  }
+
+  // swap endian
+  for (i = 0; i < 5; i++) {
+    // shortcut
+    var H_i = H[i]
+
+    // Swap
+    H[i] = (((H_i << 8) | (H_i >>> 24)) & 0x00ff00ff) |
+      (((H_i << 24) | (H_i >>> 8)) & 0xff00ff00)
   }
 
-  return script.chunks.slice(1).every(isCanonicalSignature)
+  var digestbytes = wordsToBytes(H)
+  return new Buffer(digestbytes)
 }
 
-function isMultisigOutput (script) {
-  if (script.chunks.length < 4) return false
-  if (script.chunks[script.chunks.length - 1] !== ops.OP_CHECKMULTISIG) return false
-
-  var mOp = script.chunks[0]
-  if (mOp === ops.OP_0) return false
-  if (mOp < ops.OP_1) return false
-  if (mOp > ops.OP_16) return false
-
-  var nOp = script.chunks[script.chunks.length - 2]
-  if (nOp === ops.OP_0) return false
-  if (nOp < ops.OP_1) return false
-  if (nOp > ops.OP_16) return false
+module.exports = ripemd160
 
-  var m = mOp - (ops.OP_1 - 1)
-  var n = nOp - (ops.OP_1 - 1)
-  if (n < m) return false
+}).call(this,require("buffer").Buffer)
+},{"buffer":5}],72:[function(require,module,exports){
+(function (Buffer){
+const assert = require('assert')
+/**
+ * RLP Encoding based on: https://github.com/ethereum/wiki/wiki/%5BEnglish%5D-RLP
+ * This function takes in a data, convert it to buffer if not, and a length for recursion
+ *
+ * @param {Buffer,String,Integer,Array} data - will be converted to buffer
+ * @returns {Buffer} - returns buffer of encoded data
+ **/
+exports.encode = function (input) {
+  if (input instanceof Array) {
+    var output = []
+    for (var i = 0; i < input.length; i++) {
+      output.push(exports.encode(input[i]))
+    }
+    var buf = Buffer.concat(output)
+    return Buffer.concat([encodeLength(buf.length, 192), buf])
+  } else {
+    input = toBuffer(input)
+    if (input.length === 1 && input[0] < 128) {
+      return input
+    } else {
+      return Buffer.concat([encodeLength(input.length, 128), input])
+    }
+  }
+}
 
-  var pubKeys = script.chunks.slice(1, -2)
-  if (n < pubKeys.length) return false
+function safeParseInt (v, base) {
+  if (v.slice(0, 2) === '00') {
+    throw (new Error('invalid RLP: extra zeros'))
+  }
 
-  return pubKeys.every(isCanonicalPubKey)
+  return parseInt(v, base)
 }
 
-function isNullDataOutput (script) {
-  return script.chunks[0] === ops.OP_RETURN
+function encodeLength (len, offset) {
+  if (len < 56) {
+    return new Buffer([len + offset])
+  } else {
+    var hexLength = intToHex(len)
+    var lLength = hexLength.length / 2
+    var firstByte = intToHex(offset + 55 + lLength)
+    return new Buffer(firstByte + hexLength, 'hex')
+  }
 }
 
-function classifyOutput (script) {
-  typeForce('Script', script)
+/**
+ * RLP Decoding based on: {@link https://github.com/ethereum/wiki/wiki/%5BEnglish%5D-RLP|RLP}
+ * @param {Buffer,String,Integer,Array} data - will be converted to buffer
+ * @returns {Array} - returns decode Array of Buffers containg the original message
+ **/
+exports.decode = function (input, stream) {
+  if (!input || input.length === 0) {
+    return new Buffer([])
+  }
 
-  if (isPubKeyHashOutput(script)) {
-    return 'pubkeyhash'
-  } else if (isScriptHashOutput(script)) {
-    return 'scripthash'
-  } else if (isMultisigOutput(script)) {
-    return 'multisig'
-  } else if (isPubKeyOutput(script)) {
-    return 'pubkey'
-  } else if (isNullDataOutput(script)) {
-    return 'nulldata'
+  input = toBuffer(input)
+  var decoded = _decode(input)
+
+  if (stream) {
+    return decoded
   }
 
-  return 'nonstandard'
+  assert.equal(decoded.remainder.length, 0, 'invalid remainder')
+  return decoded.data
 }
 
-function classifyInput (script, allowIncomplete) {
-  typeForce('Script', script)
-
-  if (isPubKeyHashInput(script)) {
-    return 'pubkeyhash'
-  } else if (isMultisigInput(script, allowIncomplete)) {
-    return 'multisig'
-  } else if (isScriptHashInput(script, allowIncomplete)) {
-    return 'scripthash'
-  } else if (isPubKeyInput(script)) {
-    return 'pubkey'
+exports.getLength = function (input) {
+  if (!input || input.length === 0) {
+    return new Buffer([])
   }
 
-  return 'nonstandard'
+  input = toBuffer(input)
+  var firstByte = input[0]
+  if (firstByte <= 0x7f) {
+    return input.length
+  } else if (firstByte <= 0xb7) {
+    return firstByte - 0x7f
+  } else if (firstByte <= 0xbf) {
+    return firstByte - 0xb6
+  } else if (firstByte <= 0xf7) {
+    // a list between  0-55 bytes long
+    return firstByte - 0xbf
+  } else {
+    // a list  over 55 bytes long
+    var llength = firstByte - 0xf6
+    var length = safeParseInt(input.slice(1, llength).toString('hex'), 16)
+    return llength + length
+  }
 }
 
-// Standard Script Templates
-// {pubKey} OP_CHECKSIG
-function pubKeyOutput (pubKey) {
-  return Script.fromChunks([
-    pubKey.toBuffer(),
-    ops.OP_CHECKSIG
-  ])
-}
+function _decode (input) {
+  var length, llength, data, innerRemainder, d
+  var decoded = []
+  var firstByte = input[0]
 
-// OP_DUP OP_HASH160 {pubKeyHash} OP_EQUALVERIFY OP_CHECKSIG
-function pubKeyHashOutput (hash) {
-  typeForce('Buffer', hash)
+  if (firstByte <= 0x7f) {
+    // a single byte whose value is in the [0x00, 0x7f] range, that byte is its own RLP encoding.
+    return {
+      data: input.slice(0, 1),
+      remainder: input.slice(1)
+    }
+  } else if (firstByte <= 0xb7) {
+    // string is 0-55 bytes long. A single byte with value 0x80 plus the length of the string followed by the string
+    // The range of the first byte is [0x80, 0xb7]
+    length = firstByte - 0x7f
 
-  return Script.fromChunks([
-    ops.OP_DUP,
-    ops.OP_HASH160,
-    hash,
-    ops.OP_EQUALVERIFY,
-    ops.OP_CHECKSIG
-  ])
-}
+    // set 0x80 null to 0
+    if (firstByte === 0x80) {
+      data = new Buffer([])
+    } else {
+      data = input.slice(1, length)
+    }
 
-// OP_HASH160 {scriptHash} OP_EQUAL
-function scriptHashOutput (hash) {
-  typeForce('Buffer', hash)
+    if (length === 2 && data[0] < 0x80) {
+      throw new Error('invalid rlp encoding: byte must be less 0x80')
+    }
 
-  return Script.fromChunks([
-    ops.OP_HASH160,
-    hash,
-    ops.OP_EQUAL
-  ])
-}
+    return {
+      data: data,
+      remainder: input.slice(length)
+    }
+  } else if (firstByte <= 0xbf) {
+    llength = firstByte - 0xb6
+    length = safeParseInt(input.slice(1, llength).toString('hex'), 16)
+    data = input.slice(llength, length + llength)
+    if (data.length < length) {
+      throw (new Error('invalid RLP'))
+    }
 
-// m [pubKeys ...] n OP_CHECKMULTISIG
-function multisigOutput (m, pubKeys) {
-  typeForce(['ECPubKey'], pubKeys)
+    return {
+      data: data,
+      remainder: input.slice(length + llength)
+    }
+  } else if (firstByte <= 0xf7) {
+    // a list between  0-55 bytes long
+    length = firstByte - 0xbf
+    innerRemainder = input.slice(1, length)
+    while (innerRemainder.length) {
+      d = _decode(innerRemainder)
+      decoded.push(d.data)
+      innerRemainder = d.remainder
+    }
 
-  assert(pubKeys.length >= m, 'Not enough pubKeys provided')
+    return {
+      data: decoded,
+      remainder: input.slice(length)
+    }
+  } else {
+    // a list  over 55 bytes long
+    llength = firstByte - 0xf6
+    length = safeParseInt(input.slice(1, llength).toString('hex'), 16)
+    var totalLength = llength + length
+    if (totalLength > input.length) {
+      throw new Error('invalid rlp: total length is larger than the data')
+    }
 
-  var pubKeyBuffers = pubKeys.map(function (pubKey) {
-    return pubKey.toBuffer()
-  })
-  var n = pubKeys.length
+    innerRemainder = input.slice(llength, totalLength)
+    if (innerRemainder.length === 0) {
+      throw new Error('invalid rlp, List has a invalid length')
+    }
 
-  return Script.fromChunks([].concat(
-    (ops.OP_1 - 1) + m,
-    pubKeyBuffers,
-    (ops.OP_1 - 1) + n,
-    ops.OP_CHECKMULTISIG
-  ))
+    while (innerRemainder.length) {
+      d = _decode(innerRemainder)
+      decoded.push(d.data)
+      innerRemainder = d.remainder
+    }
+    return {
+      data: decoded,
+      remainder: input.slice(totalLength)
+    }
+  }
 }
 
-// {signature}
-function pubKeyInput (signature) {
-  typeForce('Buffer', signature)
+function isHexPrefixed (str) {
+  return str.slice(0, 2) === '0x'
+}
 
-  return Script.fromChunks([signature])
+// Removes 0x from a given String
+function stripHexPrefix (str) {
+  if (typeof str !== 'string') {
+    return str
+  }
+  return isHexPrefixed(str) ? str.slice(2) : str
 }
 
-// {signature} {pubKey}
-function pubKeyHashInput (signature, pubKey) {
-  typeForce('Buffer', signature)
+function intToHex (i) {
+  var hex = i.toString(16)
+  if (hex.length % 2) {
+    hex = '0' + hex
+  }
 
-  return Script.fromChunks([signature, pubKey.toBuffer()])
+  return hex
 }
 
-// <scriptSig> {serialized scriptPubKey script}
-function scriptHashInput (scriptSig, scriptPubKey) {
-  return Script.fromChunks([].concat(
-    scriptSig.chunks,
-    scriptPubKey.toBuffer()
-  ))
+function padToEven (a) {
+  if (a.length % 2) a = '0' + a
+  return a
 }
 
-// OP_0 [signatures ...]
-function multisigInput (signatures, scriptPubKey) {
-  if (scriptPubKey) {
-    assert(isMultisigOutput(scriptPubKey))
-
-    var mOp = scriptPubKey.chunks[0]
-    var nOp = scriptPubKey.chunks[scriptPubKey.chunks.length - 2]
-    var m = mOp - (ops.OP_1 - 1)
-    var n = nOp - (ops.OP_1 - 1)
+function intToBuffer (i) {
+  var hex = intToHex(i)
+  return new Buffer(hex, 'hex')
+}
 
-    assert(signatures.length >= m, 'Not enough signatures provided')
-    assert(signatures.length <= n, 'Too many signatures provided')
+function toBuffer (v) {
+  if (!Buffer.isBuffer(v)) {
+    if (typeof v === 'string') {
+      if (isHexPrefixed(v)) {
+        v = new Buffer(padToEven(stripHexPrefix(v)), 'hex')
+      } else {
+        v = new Buffer(v)
+      }
+    } else if (typeof v === 'number') {
+      if (!v) {
+        v = new Buffer([])
+      } else {
+        v = intToBuffer(v)
+      }
+    } else if (v === null || v === undefined) {
+      v = new Buffer([])
+    } else if (v.toArray) {
+      // converts a BN to a Buffer
+      v = new Buffer(v.toArray())
+    } else {
+      throw new Error('invalid type')
+    }
   }
+  return v
+}
 
-  return Script.fromChunks([].concat(ops.OP_0, signatures))
+}).call(this,require("buffer").Buffer)
+},{"assert":1,"buffer":5}],73:[function(require,module,exports){
+'use strict'
+module.exports = require('./lib')(require('./lib/elliptic'))
+
+},{"./lib":77,"./lib/elliptic":76}],74:[function(require,module,exports){
+(function (Buffer){
+'use strict'
+var toString = Object.prototype.toString
+
+// TypeError
+exports.isArray = function (value, message) {
+  if (!Array.isArray(value)) throw TypeError(message)
 }
 
-function nullDataOutput (data) {
-  return Script.fromChunks([ops.OP_RETURN, data])
+exports.isBoolean = function (value, message) {
+  if (toString.call(value) !== '[object Boolean]') throw TypeError(message)
 }
 
-module.exports = {
-  isCanonicalPubKey: isCanonicalPubKey,
-  isCanonicalSignature: isCanonicalSignature,
-  isPubKeyHashInput: isPubKeyHashInput,
-  isPubKeyHashOutput: isPubKeyHashOutput,
-  isPubKeyInput: isPubKeyInput,
-  isPubKeyOutput: isPubKeyOutput,
-  isScriptHashInput: isScriptHashInput,
-  isScriptHashOutput: isScriptHashOutput,
-  isMultisigInput: isMultisigInput,
-  isMultisigOutput: isMultisigOutput,
-  isNullDataOutput: isNullDataOutput,
-  classifyOutput: classifyOutput,
-  classifyInput: classifyInput,
-  pubKeyOutput: pubKeyOutput,
-  pubKeyHashOutput: pubKeyHashOutput,
-  scriptHashOutput: scriptHashOutput,
-  multisigOutput: multisigOutput,
-  pubKeyInput: pubKeyInput,
-  pubKeyHashInput: pubKeyHashInput,
-  scriptHashInput: scriptHashInput,
-  multisigInput: multisigInput,
-  dataOutput: function (data) {
-    console.warn('dataOutput is deprecated, use nullDataOutput by 2.0.0')
-    return nullDataOutput(data)
-  },
-  nullDataOutput: nullDataOutput
+exports.isBuffer = function (value, message) {
+  if (!Buffer.isBuffer(value)) throw TypeError(message)
 }
 
-}).call(this,require("buffer").Buffer)
-},{"./ecsignature":62,"./opcodes":67,"./script":68,"assert":5,"buffer":7,"ecurve":49,"typeforce":53}],70:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var bufferutils = require('./bufferutils')
-var crypto = require('./crypto')
-var typeForce = require('typeforce')
-var opcodes = require('./opcodes')
-var scripts = require('./scripts')
+exports.isFunction = function (value, message) {
+  if (toString.call(value) !== '[object Function]') throw TypeError(message)
+}
 
-var Address = require('./address')
-var ECSignature = require('./ecsignature')
-var Script = require('./script')
+exports.isNumber = function (value, message) {
+  if (toString.call(value) !== '[object Number]') throw TypeError(message)
+}
 
-function Transaction () {
-  this.version = 1
-  this.locktime = 0
-  this.ins = []
-  this.outs = []
+exports.isObject = function (value, message) {
+  if (toString.call(value) !== '[object Object]') throw TypeError(message)
 }
 
-Transaction.DEFAULT_SEQUENCE = 0xffffffff
-Transaction.SIGHASH_ALL = 0x01
-Transaction.SIGHASH_NONE = 0x02
-Transaction.SIGHASH_SINGLE = 0x03
-Transaction.SIGHASH_ANYONECANPAY = 0x80
+// RangeError
+exports.isBufferLength = function (buffer, length, message) {
+  if (buffer.length !== length) throw RangeError(message)
+}
 
-Transaction.fromBuffer = function (buffer, __disableAssert) {
-  var offset = 0
-  function readSlice (n) {
-    offset += n
-    return buffer.slice(offset - n, offset)
-  }
+exports.isBufferLength2 = function (buffer, length1, length2, message) {
+  if (buffer.length !== length1 && buffer.length !== length2) throw RangeError(message)
+}
 
-  function readUInt32 () {
-    var i = buffer.readUInt32LE(offset)
-    offset += 4
-    return i
-  }
+exports.isLengthGTZero = function (value, message) {
+  if (value.length === 0) throw RangeError(message)
+}
 
-  function readUInt64 () {
-    var i = bufferutils.readUInt64LE(buffer, offset)
-    offset += 8
-    return i
+exports.isNumberInInterval = function (number, x, y, message) {
+  if (number <= x || number >= y) throw RangeError(message)
+}
+
+}).call(this,{"isBuffer":require("../../../../../.nvm/versions/node/v7.5.0/lib/node_modules/browserify/node_modules/is-buffer/index.js")})
+},{"../../../../../.nvm/versions/node/v7.5.0/lib/node_modules/browserify/node_modules/is-buffer/index.js":10}],75:[function(require,module,exports){
+(function (Buffer){
+'use strict'
+var bip66 = require('bip66')
+
+var EC_PRIVKEY_EXPORT_DER_COMPRESSED = new Buffer([
+  // begin
+  0x30, 0x81, 0xd3, 0x02, 0x01, 0x01, 0x04, 0x20,
+  // private key
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  // middle
+  0xa0, 0x81, 0x85, 0x30, 0x81, 0x82, 0x02, 0x01, 0x01, 0x30, 0x2c, 0x06, 0x07, 0x2a, 0x86, 0x48,
+  0xcE, 0x3d, 0x01, 0x01, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xfE, 0xff, 0xff, 0xfc, 0x2f, 0x30, 0x06, 0x04, 0x01, 0x00, 0x04, 0x01, 0x07, 0x04,
+  0x21, 0x02, 0x79, 0xbE, 0x66, 0x7E, 0xf9, 0xdc, 0xbb, 0xac, 0x55, 0xa0, 0x62, 0x95, 0xcE, 0x87,
+  0x0b, 0x07, 0x02, 0x9b, 0xfc, 0xdb, 0x2d, 0xcE, 0x28, 0xd9, 0x59, 0xf2, 0x81, 0x5b, 0x16, 0xf8,
+  0x17, 0x98, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0xfE, 0xba, 0xaE, 0xdc, 0xE6, 0xaf, 0x48, 0xa0, 0x3b, 0xbf, 0xd2, 0x5E,
+  0x8c, 0xd0, 0x36, 0x41, 0x41, 0x02, 0x01, 0x01, 0xa1, 0x24, 0x03, 0x22, 0x00,
+  // public key
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00
+])
+
+var EC_PRIVKEY_EXPORT_DER_UNCOMPRESSED = new Buffer([
+  // begin
+  0x30, 0x82, 0x01, 0x13, 0x02, 0x01, 0x01, 0x04, 0x20,
+  // private key
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  // middle
+  0xa0, 0x81, 0xa5, 0x30, 0x81, 0xa2, 0x02, 0x01, 0x01, 0x30, 0x2c, 0x06, 0x07, 0x2a, 0x86, 0x48,
+  0xcE, 0x3d, 0x01, 0x01, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xfE, 0xff, 0xff, 0xfc, 0x2f, 0x30, 0x06, 0x04, 0x01, 0x00, 0x04, 0x01, 0x07, 0x04,
+  0x41, 0x04, 0x79, 0xbE, 0x66, 0x7E, 0xf9, 0xdc, 0xbb, 0xac, 0x55, 0xa0, 0x62, 0x95, 0xcE, 0x87,
+  0x0b, 0x07, 0x02, 0x9b, 0xfc, 0xdb, 0x2d, 0xcE, 0x28, 0xd9, 0x59, 0xf2, 0x81, 0x5b, 0x16, 0xf8,
+  0x17, 0x98, 0x48, 0x3a, 0xda, 0x77, 0x26, 0xa3, 0xc4, 0x65, 0x5d, 0xa4, 0xfb, 0xfc, 0x0E, 0x11,
+  0x08, 0xa8, 0xfd, 0x17, 0xb4, 0x48, 0xa6, 0x85, 0x54, 0x19, 0x9c, 0x47, 0xd0, 0x8f, 0xfb, 0x10,
+  0xd4, 0xb8, 0x02, 0x21, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0xfE, 0xba, 0xaE, 0xdc, 0xE6, 0xaf, 0x48, 0xa0, 0x3b, 0xbf, 0xd2, 0x5E,
+  0x8c, 0xd0, 0x36, 0x41, 0x41, 0x02, 0x01, 0x01, 0xa1, 0x44, 0x03, 0x42, 0x00,
+  // public key
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00
+])
+
+var ZERO_BUFFER_32 = new Buffer([
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+])
+
+exports.privateKeyExport = function (privateKey, publicKey, compressed) {
+  var result = new Buffer(compressed ? EC_PRIVKEY_EXPORT_DER_COMPRESSED : EC_PRIVKEY_EXPORT_DER_UNCOMPRESSED)
+  privateKey.copy(result, compressed ? 8 : 9)
+  publicKey.copy(result, compressed ? 181 : 214)
+  return result
+}
+
+exports.privateKeyImport = function (privateKey) {
+  var length = privateKey.length
+
+  // sequence header
+  var index = 0
+  if (length < index + 1 || privateKey[index] !== 0x30) return
+  index += 1
+
+  // sequence length constructor
+  if (length < index + 1 || !(privateKey[index] & 0x80)) return
+
+  var lenb = privateKey[index] & 0x7f
+  index += 1
+  if (lenb < 1 || lenb > 2) return
+  if (length < index + lenb) return
+
+  // sequence length
+  var len = privateKey[index + lenb - 1] | (lenb > 1 ? privateKey[index + lenb - 2] << 8 : 0)
+  index += lenb
+  if (length < index + len) return
+
+  // sequence element 0: version number (=1)
+  if (length < index + 3 ||
+      privateKey[index] !== 0x02 ||
+      privateKey[index + 1] !== 0x01 ||
+      privateKey[index + 2] !== 0x01) {
+    return
   }
+  index += 3
 
-  function readVarInt () {
-    var vi = bufferutils.readVarInt(buffer, offset)
-    offset += vi.size
-    return vi.number
+  // sequence element 1: octet string, up to 32 bytes
+  if (length < index + 2 ||
+      privateKey[index] !== 0x04 ||
+      privateKey[index + 1] > 0x20 ||
+      length < index + 2 + privateKey[index + 1]) {
+    return
   }
 
-  function readScript () {
-    return Script.fromBuffer(readSlice(readVarInt()))
-  }
+  return privateKey.slice(index + 2, index + 2 + privateKey[index + 1])
+}
 
-  function readGenerationScript () {
-    return new Script(readSlice(readVarInt()), [])
+exports.signatureExport = function (sigObj) {
+  var r = Buffer.concat([new Buffer([0]), sigObj.r])
+  for (var lenR = 33, posR = 0; lenR > 1 && r[posR] === 0x00 && !(r[posR + 1] & 0x80); --lenR, ++posR);
+
+  var s = Buffer.concat([new Buffer([0]), sigObj.s])
+  for (var lenS = 33, posS = 0; lenS > 1 && s[posS] === 0x00 && !(s[posS + 1] & 0x80); --lenS, ++posS);
+
+  return bip66.encode(r.slice(posR), s.slice(posS))
+}
+
+exports.signatureImport = function (sig) {
+  var r = new Buffer(ZERO_BUFFER_32)
+  var s = new Buffer(ZERO_BUFFER_32)
+
+  try {
+    var sigObj = bip66.decode(sig)
+    if (sigObj.r.length === 33 && sigObj.r[0] === 0x00) sigObj.r = sigObj.r.slice(1)
+    if (sigObj.r.length > 32) throw new Error('R length is too long')
+    if (sigObj.s.length === 33 && sigObj.s[0] === 0x00) sigObj.s = sigObj.s.slice(1)
+    if (sigObj.s.length > 32) throw new Error('S length is too long')
+  } catch (err) {
+    return
   }
 
-  var tx = new Transaction()
-  tx.version = readUInt32()
+  sigObj.r.copy(r, 32 - sigObj.r.length)
+  sigObj.s.copy(s, 32 - sigObj.s.length)
 
-  var vinLen = readVarInt()
-  for (var i = 0; i < vinLen; ++i) {
-    var hash = readSlice(32)
+  return { r: r, s: s }
+}
 
-    if (Transaction.isCoinbaseHash(hash)) {
-      tx.ins.push({
-        hash: hash,
-        index: readUInt32(),
-        script: readGenerationScript(),
-        sequence: readUInt32()
-      })
-    } else {
-      tx.ins.push({
-        hash: hash,
-        index: readUInt32(),
-        script: readScript(),
-        sequence: readUInt32()
-      })
-    }
+exports.signatureImportLax = function (sig) {
+  var r = new Buffer(ZERO_BUFFER_32)
+  var s = new Buffer(ZERO_BUFFER_32)
+
+  var length = sig.length
+  var index = 0
+
+  // sequence tag byte
+  if (sig[index++] !== 0x30) return
+
+  // sequence length byte
+  var lenbyte = sig[index++]
+  if (lenbyte & 0x80) {
+    index += lenbyte - 0x80
+    if (index > length) return
   }
 
-  var voutLen = readVarInt()
-  for (i = 0; i < voutLen; ++i) {
-    tx.outs.push({
-      value: readUInt64(),
-      script: readScript()
-    })
+  // sequence tag byte for r
+  if (sig[index++] !== 0x02) return
+
+  // length for r
+  var rlen = sig[index++]
+  if (rlen & 0x80) {
+    lenbyte = rlen - 0x80
+    if (index + lenbyte > length) return
+    for (; lenbyte > 0 && sig[index] === 0x00; index += 1, lenbyte -= 1);
+    for (rlen = 0; lenbyte > 0; index += 1, lenbyte -= 1) rlen = (rlen << 8) + sig[index]
   }
+  if (rlen > length - index) return
+  var rindex = index
+  index += rlen
 
-  tx.locktime = readUInt32()
+  // sequence tag byte for s
+  if (sig[index++] !== 0x02) return
 
-  if (!__disableAssert) {
-    assert.equal(offset, buffer.length, 'Transaction has unexpected data')
+  // length for s
+  var slen = sig[index++]
+  if (slen & 0x80) {
+    lenbyte = slen - 0x80
+    if (index + lenbyte > length) return
+    for (; lenbyte > 0 && sig[index] === 0x00; index += 1, lenbyte -= 1);
+    for (slen = 0; lenbyte > 0; index += 1, lenbyte -= 1) slen = (slen << 8) + sig[index]
   }
+  if (slen > length - index) return
+  var sindex = index
+  index += slen
 
-  return tx
-}
+  // ignore leading zeros in r
+  for (; rlen > 0 && sig[rindex] === 0x00; rlen -= 1, rindex += 1);
+  // copy r value
+  if (rlen > 32) return
+  var rvalue = sig.slice(rindex, rindex + rlen)
+  rvalue.copy(r, 32 - rvalue.length)
 
-Transaction.fromHex = function (hex) {
-  return Transaction.fromBuffer(new Buffer(hex, 'hex'))
+  // ignore leading zeros in s
+  for (; slen > 0 && sig[sindex] === 0x00; slen -= 1, sindex += 1);
+  // copy s value
+  if (slen > 32) return
+  var svalue = sig.slice(sindex, sindex + slen)
+  svalue.copy(s, 32 - svalue.length)
+
+  return { r: r, s: s }
 }
 
-Transaction.isCoinbaseHash = function (buffer) {
-  return Array.prototype.every.call(buffer, function (x) {
-    return x === 0
-  })
+}).call(this,require("buffer").Buffer)
+},{"bip66":32,"buffer":5}],76:[function(require,module,exports){
+(function (Buffer){
+'use strict'
+var createHash = require('create-hash')
+var BN = require('bn.js')
+var EC = require('elliptic').ec
+
+var messages = require('../messages.json')
+
+var ec = new EC('secp256k1')
+var ecparams = ec.curve
+
+function loadCompressedPublicKey (first, xBuffer) {
+  var x = new BN(xBuffer)
+
+  // overflow
+  if (x.cmp(ecparams.p) >= 0) return null
+  x = x.toRed(ecparams.red)
+
+  // compute corresponding Y
+  var y = x.redSqr().redIMul(x).redIAdd(ecparams.b).redSqrt()
+  if ((first === 0x03) !== y.isOdd()) y = y.redNeg()
+
+  return ec.keyPair({ pub: { x: x, y: y } })
 }
 
-/**
- * Create a new txIn.
- *
- * Can be called with any of:
- *
- * - A transaction and an index
- * - A transaction hash and an index
- *
- * Note that this method does not sign the created input.
- */
-Transaction.prototype.addInput = function (hash, index, sequence, script) {
-  if (sequence === undefined || sequence === null) {
-    sequence = Transaction.DEFAULT_SEQUENCE
-  }
+function loadUncompressedPublicKey (first, xBuffer, yBuffer) {
+  var x = new BN(xBuffer)
+  var y = new BN(yBuffer)
 
-  script = script || Script.EMPTY
+  // overflow
+  if (x.cmp(ecparams.p) >= 0 || y.cmp(ecparams.p) >= 0) return null
 
-  if (typeof hash === 'string') {
-    // TxId hex is big-endian, we need little-endian
-    hash = bufferutils.reverse(new Buffer(hash, 'hex'))
-  } else if (hash instanceof Transaction) {
-    hash = hash.getHash()
-  }
+  x = x.toRed(ecparams.red)
+  y = y.toRed(ecparams.red)
 
-  typeForce('Buffer', hash)
-  typeForce('Number', index)
-  typeForce('Number', sequence)
-  typeForce('Script', script)
+  // is odd flag
+  if ((first === 0x06 || first === 0x07) && y.isOdd() !== (first === 0x07)) return null
 
-  assert.equal(hash.length, 32, 'Expected hash length of 32, got ' + hash.length)
+  // x*x*x + b = y*y
+  var x3 = x.redSqr().redIMul(x)
+  if (!y.redSqr().redISub(x3.redIAdd(ecparams.b)).isZero()) return null
 
-  // Add the input and return the input's index
-  return (this.ins.push({
-    hash: hash,
-    index: index,
-    script: script,
-    sequence: sequence
-  }) - 1)
+  return ec.keyPair({ pub: { x: x, y: y } })
 }
 
-/**
- * Create a new txOut.
- *
- * Can be called with:
- *
- * - A base58 address string and a value
- * - An Address object and a value
- * - A scriptPubKey Script and a value
- */
-Transaction.prototype.addOutput = function (scriptPubKey, value) {
-  // Attempt to get a valid address if it's a base58 address string
-  if (typeof scriptPubKey === 'string') {
-    scriptPubKey = Address.fromBase58Check(scriptPubKey)
+function loadPublicKey (publicKey) {
+  var first = publicKey[0]
+  switch (first) {
+    case 0x02:
+    case 0x03:
+      if (publicKey.length !== 33) return null
+      return loadCompressedPublicKey(first, publicKey.slice(1, 33))
+    case 0x04:
+    case 0x06:
+    case 0x07:
+      if (publicKey.length !== 65) return null
+      return loadUncompressedPublicKey(first, publicKey.slice(1, 33), publicKey.slice(33, 65))
+    default:
+      return null
   }
+}
 
-  // Attempt to get a valid script if it's an Address object
-  if (scriptPubKey instanceof Address) {
-    scriptPubKey = scriptPubKey.toOutputScript()
-  }
+exports.privateKeyVerify = function (privateKey) {
+  var bn = new BN(privateKey)
+  return bn.cmp(ecparams.n) < 0 && !bn.isZero()
+}
 
-  typeForce('Script', scriptPubKey)
-  typeForce('Number', value)
+exports.privateKeyExport = function (privateKey, compressed) {
+  var d = new BN(privateKey)
+  if (d.cmp(ecparams.n) >= 0 || d.isZero()) throw new Error(messages.EC_PRIVATE_KEY_EXPORT_DER_FAIL)
 
-  // Add the output and return the output's index
-  return (this.outs.push({
-    script: scriptPubKey,
-    value: value
-  }) - 1)
+  return new Buffer(ec.keyFromPrivate(privateKey).getPublic(compressed, true))
 }
 
-Transaction.prototype.clone = function () {
-  var newTx = new Transaction()
-  newTx.version = this.version
-  newTx.locktime = this.locktime
+exports.privateKeyTweakAdd = function (privateKey, tweak) {
+  var bn = new BN(tweak)
+  if (bn.cmp(ecparams.n) >= 0) throw new Error(messages.EC_PRIVATE_KEY_TWEAK_ADD_FAIL)
 
-  newTx.ins = this.ins.map(function (txIn) {
-    return {
-      hash: txIn.hash,
-      index: txIn.index,
-      script: txIn.script,
-      sequence: txIn.sequence
-    }
-  })
+  bn.iadd(new BN(privateKey))
+  if (bn.cmp(ecparams.n) >= 0) bn.isub(ecparams.n)
+  if (bn.isZero()) throw new Error(messages.EC_PRIVATE_KEY_TWEAK_ADD_FAIL)
 
-  newTx.outs = this.outs.map(function (txOut) {
-    return {
-      script: txOut.script,
-      value: txOut.value
-    }
-  })
+  return bn.toArrayLike(Buffer, 'be', 32)
+}
 
-  return newTx
+exports.privateKeyTweakMul = function (privateKey, tweak) {
+  var bn = new BN(tweak)
+  if (bn.cmp(ecparams.n) >= 0 || bn.isZero()) throw new Error(messages.EC_PRIVATE_KEY_TWEAK_MUL_FAIL)
+
+  bn.imul(new BN(privateKey))
+  if (bn.cmp(ecparams.n)) bn = bn.umod(ecparams.n)
+
+  return bn.toArrayLike(Buffer, 'be', 32)
 }
 
-/**
- * Hash transaction for signing a specific input.
- *
- * Bitcoin uses a different hash for each signed transaction input. This
- * method copies the transaction, makes the necessary changes based on the
- * hashType, serializes and finally hashes the result. This hash can then be
- * used to sign the transaction input in question.
- */
-Transaction.prototype.hashForSignature = function (inIndex, prevOutScript, hashType) {
-  // FIXME: remove in 2.x.y
-  if (arguments[0] instanceof Script) {
-    console.warn('hashForSignature(prevOutScript, inIndex, ...) has been deprecated. Use hashForSignature(inIndex, prevOutScript, ...)')
+exports.publicKeyCreate = function (privateKey, compressed) {
+  var d = new BN(privateKey)
+  if (d.cmp(ecparams.n) >= 0 || d.isZero()) throw new Error(messages.EC_PUBLIC_KEY_CREATE_FAIL)
 
-    // swap the arguments (must be stored in tmp, arguments is special)
-    var tmp = arguments[0]
-    inIndex = arguments[1]
-    prevOutScript = tmp
-  }
+  return new Buffer(ec.keyFromPrivate(privateKey).getPublic(compressed, true))
+}
 
-  typeForce('Number', inIndex)
-  typeForce('Script', prevOutScript)
-  typeForce('Number', hashType)
+exports.publicKeyConvert = function (publicKey, compressed) {
+  var pair = loadPublicKey(publicKey)
+  if (pair === null) throw new Error(messages.EC_PUBLIC_KEY_PARSE_FAIL)
 
-  assert(inIndex >= 0, 'Invalid vin index')
-  assert(inIndex < this.ins.length, 'Invalid vin index')
+  return new Buffer(pair.getPublic(compressed, true))
+}
 
-  var txTmp = this.clone()
-  var hashScript = prevOutScript.without(opcodes.OP_CODESEPARATOR)
+exports.publicKeyVerify = function (publicKey) {
+  return loadPublicKey(publicKey) !== null
+}
 
-  // Blank out other inputs' signatures
-  txTmp.ins.forEach(function (txIn) {
-    txIn.script = Script.EMPTY
-  })
-  txTmp.ins[inIndex].script = hashScript
+exports.publicKeyTweakAdd = function (publicKey, tweak, compressed) {
+  var pair = loadPublicKey(publicKey)
+  if (pair === null) throw new Error(messages.EC_PUBLIC_KEY_PARSE_FAIL)
 
-  var hashTypeModifier = hashType & 0x1f
+  tweak = new BN(tweak)
+  if (tweak.cmp(ecparams.n) >= 0) throw new Error(messages.EC_PUBLIC_KEY_TWEAK_ADD_FAIL)
 
-  if (hashTypeModifier === Transaction.SIGHASH_NONE) {
-    assert(false, 'SIGHASH_NONE not yet supported')
-  } else if (hashTypeModifier === Transaction.SIGHASH_SINGLE) {
-    assert(false, 'SIGHASH_SINGLE not yet supported')
-  }
+  return new Buffer(ecparams.g.mul(tweak).add(pair.pub).encode(true, compressed))
+}
 
-  if (hashType & Transaction.SIGHASH_ANYONECANPAY) {
-    assert(false, 'SIGHASH_ANYONECANPAY not yet supported')
+exports.publicKeyTweakMul = function (publicKey, tweak, compressed) {
+  var pair = loadPublicKey(publicKey)
+  if (pair === null) throw new Error(messages.EC_PUBLIC_KEY_PARSE_FAIL)
+
+  tweak = new BN(tweak)
+  if (tweak.cmp(ecparams.n) >= 0 || tweak.isZero()) throw new Error(messages.EC_PUBLIC_KEY_TWEAK_MUL_FAIL)
+
+  return new Buffer(pair.pub.mul(tweak).encode(true, compressed))
+}
+
+exports.publicKeyCombine = function (publicKeys, compressed) {
+  var pairs = new Array(publicKeys.length)
+  for (var i = 0; i < publicKeys.length; ++i) {
+    pairs[i] = loadPublicKey(publicKeys[i])
+    if (pairs[i] === null) throw new Error(messages.EC_PUBLIC_KEY_PARSE_FAIL)
   }
 
-  var hashTypeBuffer = new Buffer(4)
-  hashTypeBuffer.writeInt32LE(hashType, 0)
+  var point = pairs[0].pub
+  for (var j = 1; j < pairs.length; ++j) point = point.add(pairs[j].pub)
+  if (point.isInfinity()) throw new Error(messages.EC_PUBLIC_KEY_COMBINE_FAIL)
 
-  var buffer = Buffer.concat([txTmp.toBuffer(), hashTypeBuffer])
-  return crypto.hash256(buffer)
+  return new Buffer(point.encode(true, compressed))
 }
 
-Transaction.prototype.getHash = function () {
-  return crypto.hash256(this.toBuffer())
+exports.signatureNormalize = function (signature) {
+  var r = new BN(signature.slice(0, 32))
+  var s = new BN(signature.slice(32, 64))
+  if (r.cmp(ecparams.n) >= 0 || s.cmp(ecparams.n) >= 0) throw new Error(messages.ECDSA_SIGNATURE_PARSE_FAIL)
+
+  var result = new Buffer(signature)
+  if (s.cmp(ec.nh) === 1) ecparams.n.sub(s).toArrayLike(Buffer, 'be', 32).copy(result, 32)
+
+  return result
 }
 
-Transaction.prototype.getId = function () {
-  // TxHash is little-endian, we need big-endian
-  return bufferutils.reverse(this.getHash()).toString('hex')
+exports.signatureExport = function (signature) {
+  var r = signature.slice(0, 32)
+  var s = signature.slice(32, 64)
+  if (new BN(r).cmp(ecparams.n) >= 0 || new BN(s).cmp(ecparams.n) >= 0) throw new Error(messages.ECDSA_SIGNATURE_PARSE_FAIL)
+
+  return { r: r, s: s }
 }
 
-Transaction.prototype.toBuffer = function () {
-  function scriptSize (script) {
-    var length = script.buffer.length
+exports.signatureImport = function (sigObj) {
+  var r = new BN(sigObj.r)
+  if (r.cmp(ecparams.n) >= 0) r = new BN(0)
 
-    return bufferutils.varIntSize(length) + length
-  }
+  var s = new BN(sigObj.s)
+  if (s.cmp(ecparams.n) >= 0) s = new BN(0)
 
-  var buffer = new Buffer(
-    8 +
-    bufferutils.varIntSize(this.ins.length) +
-    bufferutils.varIntSize(this.outs.length) +
-    this.ins.reduce(function (sum, input) { return sum + 40 + scriptSize(input.script) }, 0) +
-    this.outs.reduce(function (sum, output) { return sum + 8 + scriptSize(output.script) }, 0)
-  )
+  return Buffer.concat([
+    r.toArrayLike(Buffer, 'be', 32),
+    s.toArrayLike(Buffer, 'be', 32)
+  ])
+}
 
-  var offset = 0
-  function writeSlice (slice) {
-    slice.copy(buffer, offset)
-    offset += slice.length
-  }
+exports.sign = function (message, privateKey, noncefn, data) {
+  if (typeof noncefn === 'function') {
+    var getNonce = noncefn
+    noncefn = function (counter) {
+      var nonce = getNonce(message, privateKey, null, data, counter)
+      if (!Buffer.isBuffer(nonce) || nonce.length !== 32) throw new Error(messages.ECDSA_SIGN_FAIL)
 
-  function writeUInt32 (i) {
-    buffer.writeUInt32LE(i, offset)
-    offset += 4
+      return new BN(nonce)
+    }
   }
 
-  function writeUInt64 (i) {
-    bufferutils.writeUInt64LE(buffer, i, offset)
-    offset += 8
-  }
+  var d = new BN(privateKey)
+  if (d.cmp(ecparams.n) >= 0 || d.isZero()) throw new Error(messages.ECDSA_SIGN_FAIL)
 
-  function writeVarInt (i) {
-    var n = bufferutils.writeVarInt(buffer, i, offset)
-    offset += n
+  var result = ec.sign(message, privateKey, { canonical: true, k: noncefn, pers: data })
+  return {
+    signature: Buffer.concat([
+      result.r.toArrayLike(Buffer, 'be', 32),
+      result.s.toArrayLike(Buffer, 'be', 32)
+    ]),
+    recovery: result.recoveryParam
   }
+}
 
-  writeUInt32(this.version)
-  writeVarInt(this.ins.length)
+exports.verify = function (message, signature, publicKey) {
+  var sigObj = {r: signature.slice(0, 32), s: signature.slice(32, 64)}
 
-  this.ins.forEach(function (txIn) {
-    writeSlice(txIn.hash)
-    writeUInt32(txIn.index)
-    writeVarInt(txIn.script.buffer.length)
-    writeSlice(txIn.script.buffer)
-    writeUInt32(txIn.sequence)
-  })
+  var sigr = new BN(sigObj.r)
+  var sigs = new BN(sigObj.s)
+  if (sigr.cmp(ecparams.n) >= 0 || sigs.cmp(ecparams.n) >= 0) throw new Error(messages.ECDSA_SIGNATURE_PARSE_FAIL)
+  if (sigs.cmp(ec.nh) === 1 || sigr.isZero() || sigs.isZero()) return false
 
-  writeVarInt(this.outs.length)
-  this.outs.forEach(function (txOut) {
-    writeUInt64(txOut.value)
-    writeVarInt(txOut.script.buffer.length)
-    writeSlice(txOut.script.buffer)
-  })
+  var pair = loadPublicKey(publicKey)
+  if (pair === null) throw new Error(messages.EC_PUBLIC_KEY_PARSE_FAIL)
+
+  return ec.verify(message, sigObj, {x: pair.pub.x, y: pair.pub.y})
+}
+
+exports.recover = function (message, signature, recovery, compressed) {
+  var sigObj = {r: signature.slice(0, 32), s: signature.slice(32, 64)}
+
+  var sigr = new BN(sigObj.r)
+  var sigs = new BN(sigObj.s)
+  if (sigr.cmp(ecparams.n) >= 0 || sigs.cmp(ecparams.n) >= 0) throw new Error(messages.ECDSA_SIGNATURE_PARSE_FAIL)
 
-  writeUInt32(this.locktime)
+  try {
+    if (sigr.isZero() || sigs.isZero()) throw new Error()
 
-  return buffer
+    var point = ec.recoverPubKey(message, sigObj, recovery)
+    return new Buffer(point.encode(true, compressed))
+  } catch (err) {
+    throw new Error(messages.ECDSA_RECOVER_FAIL)
+  }
 }
 
-Transaction.prototype.toHex = function () {
-  return this.toBuffer().toString('hex')
+exports.ecdh = function (publicKey, privateKey) {
+  var shared = exports.ecdhUnsafe(publicKey, privateKey, true)
+  return createHash('sha256').update(shared).digest()
 }
 
-Transaction.prototype.setInputScript = function (index, script) {
-  typeForce('Number', index)
-  typeForce('Script', script)
+exports.ecdhUnsafe = function (publicKey, privateKey, compressed) {
+  var pair = loadPublicKey(publicKey)
+  if (pair === null) throw new Error(messages.EC_PUBLIC_KEY_PARSE_FAIL)
 
-  this.ins[index].script = script
+  var scalar = new BN(privateKey)
+  if (scalar.cmp(ecparams.n) >= 0 || scalar.isZero()) throw new Error(messages.ECDH_FAIL)
+
+  return new Buffer(pair.pub.mul(scalar).encode(true, compressed))
 }
 
-// FIXME: remove in 2.x.y
-Transaction.prototype.sign = function (index, privKey, hashType) {
-  console.warn('Transaction.prototype.sign is deprecated.  Use TransactionBuilder instead.')
+}).call(this,require("buffer").Buffer)
+},{"../messages.json":78,"bn.js":33,"buffer":5,"create-hash":36,"elliptic":39}],77:[function(require,module,exports){
+'use strict'
+var assert = require('./assert')
+var der = require('./der')
+var messages = require('./messages.json')
 
-  var prevOutScript = privKey.pub.getAddress().toOutputScript()
-  var signature = this.signInput(index, prevOutScript, privKey, hashType)
+function initCompressedValue (value, defaultValue) {
+  if (value === undefined) return defaultValue
 
-  var scriptSig = scripts.pubKeyHashInput(signature, privKey.pub)
-  this.setInputScript(index, scriptSig)
+  assert.isBoolean(value, messages.COMPRESSED_TYPE_INVALID)
+  return value
 }
 
-// FIXME: remove in 2.x.y
-Transaction.prototype.signInput = function (index, prevOutScript, privKey, hashType) {
-  console.warn('Transaction.prototype.signInput is deprecated.  Use TransactionBuilder instead.')
+module.exports = function (secp256k1) {
+  return {
+    privateKeyVerify: function (privateKey) {
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      return privateKey.length === 32 && secp256k1.privateKeyVerify(privateKey)
+    },
 
-  hashType = hashType || Transaction.SIGHASH_ALL
+    privateKeyExport: function (privateKey, compressed) {
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      assert.isBufferLength(privateKey, 32, messages.EC_PRIVATE_KEY_LENGTH_INVALID)
 
-  var hash = this.hashForSignature(index, prevOutScript, hashType)
-  var signature = privKey.sign(hash)
+      compressed = initCompressedValue(compressed, true)
+      var publicKey = secp256k1.privateKeyExport(privateKey, compressed)
 
-  return signature.toScriptSignature(hashType)
-}
+      return der.privateKeyExport(privateKey, publicKey, compressed)
+    },
 
-// FIXME: remove in 2.x.y
-Transaction.prototype.validateInput = function (index, prevOutScript, pubKey, buffer) {
-  console.warn('Transaction.prototype.validateInput is deprecated.  Use TransactionBuilder instead.')
+    privateKeyImport: function (privateKey) {
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
 
-  var parsed = ECSignature.parseScriptSignature(buffer)
-  var hash = this.hashForSignature(index, prevOutScript, parsed.hashType)
+      privateKey = der.privateKeyImport(privateKey)
+      if (privateKey && privateKey.length === 32 && secp256k1.privateKeyVerify(privateKey)) return privateKey
 
-  return pubKey.verify(hash, parsed.signature)
-}
+      throw new Error(messages.EC_PRIVATE_KEY_IMPORT_DER_FAIL)
+    },
 
-module.exports = Transaction
+    privateKeyTweakAdd: function (privateKey, tweak) {
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      assert.isBufferLength(privateKey, 32, messages.EC_PRIVATE_KEY_LENGTH_INVALID)
 
-}).call(this,require("buffer").Buffer)
-},{"./address":54,"./bufferutils":57,"./crypto":58,"./ecsignature":62,"./opcodes":67,"./script":68,"./scripts":69,"assert":5,"buffer":7,"typeforce":53}],71:[function(require,module,exports){
-(function (Buffer){
-var assert = require('assert')
-var ops = require('./opcodes')
-var scripts = require('./scripts')
+      assert.isBuffer(tweak, messages.TWEAK_TYPE_INVALID)
+      assert.isBufferLength(tweak, 32, messages.TWEAK_LENGTH_INVALID)
 
-var ECPubKey = require('./ecpubkey')
-var ECSignature = require('./ecsignature')
-var Script = require('./script')
-var Transaction = require('./transaction')
+      return secp256k1.privateKeyTweakAdd(privateKey, tweak)
+    },
 
-function extractInput (txIn) {
-  var redeemScript
-  var scriptSig = txIn.script
-  var prevOutScript
-  var prevOutType = scripts.classifyInput(scriptSig, true)
-  var scriptType
+    privateKeyTweakMul: function (privateKey, tweak) {
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      assert.isBufferLength(privateKey, 32, messages.EC_PRIVATE_KEY_LENGTH_INVALID)
 
-  // Re-classify if scriptHash
-  if (prevOutType === 'scripthash') {
-    redeemScript = Script.fromBuffer(scriptSig.chunks.slice(-1)[0])
-    prevOutScript = scripts.scriptHashOutput(redeemScript.getHash())
+      assert.isBuffer(tweak, messages.TWEAK_TYPE_INVALID)
+      assert.isBufferLength(tweak, 32, messages.TWEAK_LENGTH_INVALID)
 
-    scriptSig = Script.fromChunks(scriptSig.chunks.slice(0, -1))
-    scriptType = scripts.classifyInput(scriptSig, true)
-  } else {
-    scriptType = prevOutType
-  }
+      return secp256k1.privateKeyTweakMul(privateKey, tweak)
+    },
 
-  // Extract hashType, pubKeys and signatures
-  var hashType, parsed, pubKeys, signatures
+    publicKeyCreate: function (privateKey, compressed) {
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      assert.isBufferLength(privateKey, 32, messages.EC_PRIVATE_KEY_LENGTH_INVALID)
 
-  switch (scriptType) {
-    case 'pubkeyhash': {
-      parsed = ECSignature.parseScriptSignature(scriptSig.chunks[0])
-      hashType = parsed.hashType
-      pubKeys = [ECPubKey.fromBuffer(scriptSig.chunks[1])]
-      signatures = [parsed.signature]
-      prevOutScript = pubKeys[0].getAddress().toOutputScript()
+      compressed = initCompressedValue(compressed, true)
 
-      break
-    }
+      return secp256k1.publicKeyCreate(privateKey, compressed)
+    },
 
-    case 'pubkey': {
-      parsed = ECSignature.parseScriptSignature(scriptSig.chunks[0])
-      hashType = parsed.hashType
-      signatures = [parsed.signature]
+    publicKeyConvert: function (publicKey, compressed) {
+      assert.isBuffer(publicKey, messages.EC_PUBLIC_KEY_TYPE_INVALID)
+      assert.isBufferLength2(publicKey, 33, 65, messages.EC_PUBLIC_KEY_LENGTH_INVALID)
 
-      if (redeemScript) {
-        pubKeys = [ECPubKey.fromBuffer(redeemScript.chunks[0])]
+      compressed = initCompressedValue(compressed, true)
+
+      return secp256k1.publicKeyConvert(publicKey, compressed)
+    },
+
+    publicKeyVerify: function (publicKey) {
+      assert.isBuffer(publicKey, messages.EC_PUBLIC_KEY_TYPE_INVALID)
+      return secp256k1.publicKeyVerify(publicKey)
+    },
+
+    publicKeyTweakAdd: function (publicKey, tweak, compressed) {
+      assert.isBuffer(publicKey, messages.EC_PUBLIC_KEY_TYPE_INVALID)
+      assert.isBufferLength2(publicKey, 33, 65, messages.EC_PUBLIC_KEY_LENGTH_INVALID)
+
+      assert.isBuffer(tweak, messages.TWEAK_TYPE_INVALID)
+      assert.isBufferLength(tweak, 32, messages.TWEAK_LENGTH_INVALID)
+
+      compressed = initCompressedValue(compressed, true)
+
+      return secp256k1.publicKeyTweakAdd(publicKey, tweak, compressed)
+    },
+
+    publicKeyTweakMul: function (publicKey, tweak, compressed) {
+      assert.isBuffer(publicKey, messages.EC_PUBLIC_KEY_TYPE_INVALID)
+      assert.isBufferLength2(publicKey, 33, 65, messages.EC_PUBLIC_KEY_LENGTH_INVALID)
+
+      assert.isBuffer(tweak, messages.TWEAK_TYPE_INVALID)
+      assert.isBufferLength(tweak, 32, messages.TWEAK_LENGTH_INVALID)
+
+      compressed = initCompressedValue(compressed, true)
+
+      return secp256k1.publicKeyTweakMul(publicKey, tweak, compressed)
+    },
+
+    publicKeyCombine: function (publicKeys, compressed) {
+      assert.isArray(publicKeys, messages.EC_PUBLIC_KEYS_TYPE_INVALID)
+      assert.isLengthGTZero(publicKeys, messages.EC_PUBLIC_KEYS_LENGTH_INVALID)
+      for (var i = 0; i < publicKeys.length; ++i) {
+        assert.isBuffer(publicKeys[i], messages.EC_PUBLIC_KEY_TYPE_INVALID)
+        assert.isBufferLength2(publicKeys[i], 33, 65, messages.EC_PUBLIC_KEY_LENGTH_INVALID)
       }
 
-      break
-    }
+      compressed = initCompressedValue(compressed, true)
 
-    case 'multisig': {
-      signatures = scriptSig.chunks.slice(1).map(function (chunk) {
-        if (chunk === ops.OP_0) return chunk
+      return secp256k1.publicKeyCombine(publicKeys, compressed)
+    },
 
-        var parsed = ECSignature.parseScriptSignature(chunk)
-        hashType = parsed.hashType
+    signatureNormalize: function (signature) {
+      assert.isBuffer(signature, messages.ECDSA_SIGNATURE_TYPE_INVALID)
+      assert.isBufferLength(signature, 64, messages.ECDSA_SIGNATURE_LENGTH_INVALID)
 
-        return parsed.signature
-      })
+      return secp256k1.signatureNormalize(signature)
+    },
 
-      if (redeemScript) {
-        pubKeys = redeemScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
+    signatureExport: function (signature) {
+      assert.isBuffer(signature, messages.ECDSA_SIGNATURE_TYPE_INVALID)
+      assert.isBufferLength(signature, 64, messages.ECDSA_SIGNATURE_LENGTH_INVALID)
+
+      var sigObj = secp256k1.signatureExport(signature)
+      return der.signatureExport(sigObj)
+    },
+
+    signatureImport: function (sig) {
+      assert.isBuffer(sig, messages.ECDSA_SIGNATURE_TYPE_INVALID)
+      assert.isLengthGTZero(sig, messages.ECDSA_SIGNATURE_LENGTH_INVALID)
+
+      var sigObj = der.signatureImport(sig)
+      if (sigObj) return secp256k1.signatureImport(sigObj)
+
+      throw new Error(messages.ECDSA_SIGNATURE_PARSE_DER_FAIL)
+    },
+
+    signatureImportLax: function (sig) {
+      assert.isBuffer(sig, messages.ECDSA_SIGNATURE_TYPE_INVALID)
+      assert.isLengthGTZero(sig, messages.ECDSA_SIGNATURE_LENGTH_INVALID)
+
+      var sigObj = der.signatureImportLax(sig)
+      if (sigObj) return secp256k1.signatureImport(sigObj)
+
+      throw new Error(messages.ECDSA_SIGNATURE_PARSE_DER_FAIL)
+    },
+
+    sign: function (message, privateKey, options) {
+      assert.isBuffer(message, messages.MSG32_TYPE_INVALID)
+      assert.isBufferLength(message, 32, messages.MSG32_LENGTH_INVALID)
+
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      assert.isBufferLength(privateKey, 32, messages.EC_PRIVATE_KEY_LENGTH_INVALID)
+
+      var data = null
+      var noncefn = null
+      if (options !== undefined) {
+        assert.isObject(options, messages.OPTIONS_TYPE_INVALID)
+
+        if (options.data !== undefined) {
+          assert.isBuffer(options.data, messages.OPTIONS_DATA_TYPE_INVALID)
+          assert.isBufferLength(options.data, 32, messages.OPTIONS_DATA_LENGTH_INVALID)
+          data = options.data
+        }
+
+        if (options.noncefn !== undefined) {
+          assert.isFunction(options.noncefn, messages.OPTIONS_NONCEFN_TYPE_INVALID)
+          noncefn = options.noncefn
+        }
       }
 
-      break
-    }
-  }
+      return secp256k1.sign(message, privateKey, noncefn, data)
+    },
 
-  return {
-    hashType: hashType,
-    prevOutScript: prevOutScript,
-    prevOutType: prevOutType,
-    pubKeys: pubKeys,
-    redeemScript: redeemScript,
-    scriptType: scriptType,
-    signatures: signatures
-  }
-}
+    verify: function (message, signature, publicKey) {
+      assert.isBuffer(message, messages.MSG32_TYPE_INVALID)
+      assert.isBufferLength(message, 32, messages.MSG32_LENGTH_INVALID)
 
-function TransactionBuilder () {
-  this.prevTxMap = {}
-  this.prevOutScripts = {}
-  this.prevOutTypes = {}
+      assert.isBuffer(signature, messages.ECDSA_SIGNATURE_TYPE_INVALID)
+      assert.isBufferLength(signature, 64, messages.ECDSA_SIGNATURE_LENGTH_INVALID)
 
-  this.inputs = []
-  this.tx = new Transaction()
-}
+      assert.isBuffer(publicKey, messages.EC_PUBLIC_KEY_TYPE_INVALID)
+      assert.isBufferLength2(publicKey, 33, 65, messages.EC_PUBLIC_KEY_LENGTH_INVALID)
 
-TransactionBuilder.fromTransaction = function (transaction) {
-  var txb = new TransactionBuilder()
+      return secp256k1.verify(message, signature, publicKey)
+    },
 
-  // Copy other transaction fields
-  txb.tx.version = transaction.version
-  txb.tx.locktime = transaction.locktime
+    recover: function (message, signature, recovery, compressed) {
+      assert.isBuffer(message, messages.MSG32_TYPE_INVALID)
+      assert.isBufferLength(message, 32, messages.MSG32_LENGTH_INVALID)
 
-  // Extract/add inputs
-  transaction.ins.forEach(function (txIn) {
-    txb.addInput(txIn.hash, txIn.index, txIn.sequence)
-  })
+      assert.isBuffer(signature, messages.ECDSA_SIGNATURE_TYPE_INVALID)
+      assert.isBufferLength(signature, 64, messages.ECDSA_SIGNATURE_LENGTH_INVALID)
 
-  // Extract/add outputs
-  transaction.outs.forEach(function (txOut) {
-    txb.addOutput(txOut.script, txOut.value)
-  })
+      assert.isNumber(recovery, messages.RECOVERY_ID_TYPE_INVALID)
+      assert.isNumberInInterval(recovery, -1, 4, messages.RECOVERY_ID_VALUE_INVALID)
 
-  // Extract/add signatures
-  txb.inputs = transaction.ins.map(function (txIn) {
-    // TODO: remove me after testcase added
-    assert(!Transaction.isCoinbaseHash(txIn.hash), 'coinbase inputs not supported')
+      compressed = initCompressedValue(compressed, true)
 
-    // Ignore empty scripts
-    if (txIn.script.buffer.length === 0) return {}
+      return secp256k1.recover(message, signature, recovery, compressed)
+    },
 
-    return extractInput(txIn)
-  })
+    ecdh: function (publicKey, privateKey) {
+      assert.isBuffer(publicKey, messages.EC_PUBLIC_KEY_TYPE_INVALID)
+      assert.isBufferLength2(publicKey, 33, 65, messages.EC_PUBLIC_KEY_LENGTH_INVALID)
 
-  return txb
-}
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      assert.isBufferLength(privateKey, 32, messages.EC_PRIVATE_KEY_LENGTH_INVALID)
 
-TransactionBuilder.prototype.addInput = function (prevTx, index, sequence, prevOutScript) {
-  var prevOutHash
+      return secp256k1.ecdh(publicKey, privateKey)
+    },
 
-  // txId
-  if (typeof prevTx === 'string') {
-    prevOutHash = new Buffer(prevTx, 'hex')
+    ecdhUnsafe: function (publicKey, privateKey, compressed) {
+      assert.isBuffer(publicKey, messages.EC_PUBLIC_KEY_TYPE_INVALID)
+      assert.isBufferLength2(publicKey, 33, 65, messages.EC_PUBLIC_KEY_LENGTH_INVALID)
 
-    // TxId hex is big-endian, we want little-endian hash
-    Array.prototype.reverse.call(prevOutHash)
+      assert.isBuffer(privateKey, messages.EC_PRIVATE_KEY_TYPE_INVALID)
+      assert.isBufferLength(privateKey, 32, messages.EC_PRIVATE_KEY_LENGTH_INVALID)
 
-  // Transaction
-  } else if (prevTx instanceof Transaction) {
-    prevOutHash = prevTx.getHash()
-    prevOutScript = prevTx.outs[index].script
+      compressed = initCompressedValue(compressed, true)
 
-  // txHash
-  } else {
-    prevOutHash = prevTx
+      return secp256k1.ecdhUnsafe(publicKey, privateKey, compressed)
+    }
   }
+}
 
-  var input = {}
-  if (prevOutScript) {
-    var prevOutType = scripts.classifyOutput(prevOutScript)
+},{"./assert":74,"./der":75,"./messages.json":78}],78:[function(require,module,exports){
+module.exports={
+  "COMPRESSED_TYPE_INVALID": "compressed should be a boolean",
+  "EC_PRIVATE_KEY_TYPE_INVALID": "private key should be a Buffer",
+  "EC_PRIVATE_KEY_LENGTH_INVALID": "private key length is invalid",
+  "EC_PRIVATE_KEY_TWEAK_ADD_FAIL": "tweak out of range or resulting private key is invalid",
+  "EC_PRIVATE_KEY_TWEAK_MUL_FAIL": "tweak out of range",
+  "EC_PRIVATE_KEY_EXPORT_DER_FAIL": "couldn't export to DER format",
+  "EC_PRIVATE_KEY_IMPORT_DER_FAIL": "couldn't import from DER format",
+  "EC_PUBLIC_KEYS_TYPE_INVALID": "public keys should be an Array",
+  "EC_PUBLIC_KEYS_LENGTH_INVALID": "public keys Array should have at least 1 element",
+  "EC_PUBLIC_KEY_TYPE_INVALID": "public key should be a Buffer",
+  "EC_PUBLIC_KEY_LENGTH_INVALID": "public key length is invalid",
+  "EC_PUBLIC_KEY_PARSE_FAIL": "the public key could not be parsed or is invalid",
+  "EC_PUBLIC_KEY_CREATE_FAIL": "private was invalid, try again",
+  "EC_PUBLIC_KEY_TWEAK_ADD_FAIL": "tweak out of range or resulting public key is invalid",
+  "EC_PUBLIC_KEY_TWEAK_MUL_FAIL": "tweak out of range",
+  "EC_PUBLIC_KEY_COMBINE_FAIL": "the sum of the public keys is not valid",
+  "ECDH_FAIL": "scalar was invalid (zero or overflow)",
+  "ECDSA_SIGNATURE_TYPE_INVALID": "signature should be a Buffer",
+  "ECDSA_SIGNATURE_LENGTH_INVALID": "signature length is invalid",
+  "ECDSA_SIGNATURE_PARSE_FAIL": "couldn't parse signature",
+  "ECDSA_SIGNATURE_PARSE_DER_FAIL": "couldn't parse DER signature",
+  "ECDSA_SIGNATURE_SERIALIZE_DER_FAIL": "couldn't serialize signature to DER format",
+  "ECDSA_SIGN_FAIL": "nonce generation function failed or private key is invalid",
+  "ECDSA_RECOVER_FAIL": "couldn't recover public key from signature",
+  "MSG32_TYPE_INVALID": "message should be a Buffer",
+  "MSG32_LENGTH_INVALID": "message length is invalid",
+  "OPTIONS_TYPE_INVALID": "options should be an Object",
+  "OPTIONS_DATA_TYPE_INVALID": "options.data should be a Buffer",
+  "OPTIONS_DATA_LENGTH_INVALID": "options.data length is invalid",
+  "OPTIONS_NONCEFN_TYPE_INVALID": "options.noncefn should be a Function",
+  "RECOVERY_ID_TYPE_INVALID": "recovery should be a Number",
+  "RECOVERY_ID_VALUE_INVALID": "recovery should have value between -1 and 4",
+  "TWEAK_TYPE_INVALID": "tweak should be a Buffer",
+  "TWEAK_LENGTH_INVALID": "tweak length is invalid"
+}
+
+},{}],79:[function(require,module,exports){
+(function (Buffer){
+// prototype class for hash functions
+function Hash (blockSize, finalSize) {
+  this._block = new Buffer(blockSize)
+  this._finalSize = finalSize
+  this._blockSize = blockSize
+  this._len = 0
+  this._s = 0
+}
 
-    // if we can, extract pubKey information
-    switch (prevOutType) {
-      case 'multisig': {
-        input.pubKeys = prevOutScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
-        break
-      }
+Hash.prototype.update = function (data, enc) {
+  if (typeof data === 'string') {
+    enc = enc || 'utf8'
+    data = new Buffer(data, enc)
+  }
 
-      case 'pubkey': {
-        input.pubKeys = prevOutScript.chunks.slice(0, 1).map(ECPubKey.fromBuffer)
-        break
-      }
-    }
+  var l = this._len += data.length
+  var s = this._s || 0
+  var f = 0
+  var buffer = this._block
 
-    if (prevOutType !== 'scripthash') {
-      input.scriptType = prevOutType
+  while (s < l) {
+    var t = Math.min(data.length, f + this._blockSize - (s % this._blockSize))
+    var ch = (t - f)
+
+    for (var i = 0; i < ch; i++) {
+      buffer[(s % this._blockSize) + i] = data[i + f]
     }
 
-    input.prevOutScript = prevOutScript
-    input.prevOutType = prevOutType
+    s += ch
+    f += ch
+
+    if ((s % this._blockSize) === 0) {
+      this._update(buffer)
+    }
   }
+  this._s = s
 
-  assert(this.inputs.every(function (input2) {
-    if (input2.hashType === undefined) return true
+  return this
+}
+
+Hash.prototype.digest = function (enc) {
+  // Suppose the length of the message M, in bits, is l
+  var l = this._len * 8
+
+  // Append the bit 1 to the end of the message
+  this._block[this._len % this._blockSize] = 0x80
+
+  // and then k zero bits, where k is the smallest non-negative solution to the equation (l + 1 + k) === finalSize mod blockSize
+  this._block.fill(0, this._len % this._blockSize + 1)
 
-    return input2.hashType & Transaction.SIGHASH_ANYONECANPAY
-  }), 'No, this would invalidate signatures')
+  if (l % (this._blockSize * 8) >= this._finalSize * 8) {
+    this._update(this._block)
+    this._block.fill(0)
+  }
 
-  var prevOut = prevOutHash.toString('hex') + ':' + index
-  assert(!(prevOut in this.prevTxMap), 'Transaction is already an input')
+  // to this append the block which is equal to the number l written in binary
+  // TODO: handle case where l is > Math.pow(2, 29)
+  this._block.writeInt32BE(l, this._blockSize - 4)
 
-  var vin = this.tx.addInput(prevOutHash, index, sequence)
-  this.inputs[vin] = input
-  this.prevTxMap[prevOut] = vin
+  var hash = this._update(this._block) || this._hash()
 
-  return vin
+  return enc ? hash.toString(enc) : hash
 }
 
-TransactionBuilder.prototype.addOutput = function (scriptPubKey, value) {
-  assert(this.inputs.every(function (input) {
-    if (input.hashType === undefined) return true
+Hash.prototype._update = function () {
+  throw new Error('_update must be implemented by subclass')
+}
 
-    return (input.hashType & 0x1f) === Transaction.SIGHASH_SINGLE
-  }), 'No, this would invalidate signatures')
+module.exports = Hash
 
-  return this.tx.addOutput(scriptPubKey, value)
-}
+}).call(this,require("buffer").Buffer)
+},{"buffer":5}],80:[function(require,module,exports){
+var exports = module.exports = function SHA (algorithm) {
+  algorithm = algorithm.toLowerCase()
 
-TransactionBuilder.prototype.build = function () {
-  return this.__build(false)
-}
-TransactionBuilder.prototype.buildIncomplete = function () {
-  return this.__build(true)
-}
+  var Algorithm = exports[algorithm]
+  if (!Algorithm) throw new Error(algorithm + ' is not supported (we accept pull requests)')
 
-var canSignTypes = {
-  'pubkeyhash': true,
-  'multisig': true,
-  'pubkey': true
+  return new Algorithm()
 }
 
-TransactionBuilder.prototype.__build = function (allowIncomplete) {
-  if (!allowIncomplete) {
-    assert(this.tx.ins.length > 0, 'Transaction has no inputs')
-    assert(this.tx.outs.length > 0, 'Transaction has no outputs')
-  }
+exports.sha = require('./sha')
+exports.sha1 = require('./sha1')
+exports.sha224 = require('./sha224')
+exports.sha256 = require('./sha256')
+exports.sha384 = require('./sha384')
+exports.sha512 = require('./sha512')
 
-  var tx = this.tx.clone()
+},{"./sha":81,"./sha1":82,"./sha224":83,"./sha256":84,"./sha384":85,"./sha512":86}],81:[function(require,module,exports){
+(function (Buffer){
+/*
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-0, as defined
+ * in FIPS PUB 180-1
+ * This source code is derived from sha1.js of the same repository.
+ * The difference between SHA-0 and SHA-1 is just a bitwise rotate left
+ * operation was added.
+ */
 
-  // Create script signatures from signature meta-data
-  this.inputs.forEach(function (input, index) {
-    var scriptType = input.scriptType
-    var scriptSig
+var inherits = require('inherits')
+var Hash = require('./hash')
 
-    if (!allowIncomplete) {
-      assert(!!scriptType, 'Transaction is not complete')
-      assert(scriptType in canSignTypes, scriptType + ' not supported')
-      assert(input.signatures, 'Transaction is missing signatures')
-    }
+var K = [
+  0x5a827999, 0x6ed9eba1, 0x8f1bbcdc | 0, 0xca62c1d6 | 0
+]
 
-    if (input.signatures) {
-      switch (scriptType) {
-        case 'pubkeyhash': {
-          var pkhSignature = input.signatures[0].toScriptSignature(input.hashType)
-          scriptSig = scripts.pubKeyHashInput(pkhSignature, input.pubKeys[0])
-          break
-        }
+var W = new Array(80)
 
-        case 'multisig': {
-          // Array.prototype.map is sparse-compatible
-          var msSignatures = input.signatures.map(function (signature) {
-            return signature && signature.toScriptSignature(input.hashType)
-          })
+function Sha () {
+  this.init()
+  this._w = W
 
-          // fill in blanks with OP_0
-          if (allowIncomplete) {
-            for (var i = 0; i < msSignatures.length; ++i) {
-              if (msSignatures[i]) continue
+  Hash.call(this, 64, 56)
+}
 
-              msSignatures[i] = ops.OP_0
-            }
-          } else {
-            // Array.prototype.filter returns non-sparse array
-            msSignatures = msSignatures.filter(function (x) { return x })
-          }
+inherits(Sha, Hash)
 
-          var redeemScript = allowIncomplete ? undefined : input.redeemScript
-          scriptSig = scripts.multisigInput(msSignatures, redeemScript)
-          break
-        }
+Sha.prototype.init = function () {
+  this._a = 0x67452301
+  this._b = 0xefcdab89
+  this._c = 0x98badcfe
+  this._d = 0x10325476
+  this._e = 0xc3d2e1f0
 
-        case 'pubkey': {
-          var pkSignature = input.signatures[0].toScriptSignature(input.hashType)
-          scriptSig = scripts.pubKeyInput(pkSignature)
-          break
-        }
-      }
-    }
+  return this
+}
 
-    // did we build a scriptSig?
-    if (scriptSig) {
-      // wrap as scriptHash if necessary
-      if (input.prevOutType === 'scripthash') {
-        scriptSig = scripts.scriptHashInput(scriptSig, input.redeemScript)
-      }
+function rotl5 (num) {
+  return (num << 5) | (num >>> 27)
+}
 
-      tx.setInputScript(index, scriptSig)
-    }
-  })
+function rotl30 (num) {
+  return (num << 30) | (num >>> 2)
+}
 
-  return tx
+function ft (s, b, c, d) {
+  if (s === 0) return (b & c) | ((~b) & d)
+  if (s === 2) return (b & c) | (b & d) | (c & d)
+  return b ^ c ^ d
 }
 
-TransactionBuilder.prototype.sign = function (index, privKey, redeemScript, hashType) {
-  assert(index in this.inputs, 'No input at index: ' + index)
-  hashType = hashType || Transaction.SIGHASH_ALL
+Sha.prototype._update = function (M) {
+  var W = this._w
 
-  var input = this.inputs[index]
-  var canSign = input.hashType &&
-    input.prevOutScript &&
-    input.prevOutType &&
-    input.pubKeys &&
-    input.scriptType &&
-    input.signatures
+  var a = this._a | 0
+  var b = this._b | 0
+  var c = this._c | 0
+  var d = this._d | 0
+  var e = this._e | 0
 
-  // are we almost ready to sign?
-  if (canSign) {
-    // if redeemScript was provided, enforce consistency
-    if (redeemScript) {
-      assert.deepEqual(input.redeemScript, redeemScript, 'Inconsistent redeemScript')
-    }
+  for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4)
+  for (; i < 80; ++i) W[i] = W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16]
 
-    assert.equal(input.hashType, hashType, 'Inconsistent hashType')
+  for (var j = 0; j < 80; ++j) {
+    var s = ~~(j / 20)
+    var t = (rotl5(a) + ft(s, b, c, d) + e + W[j] + K[s]) | 0
 
-  // no? prepare
-  } else {
-    // must be pay-to-scriptHash?
-    if (redeemScript) {
-      // if we have a prevOutScript, enforce scriptHash equality to the redeemScript
-      if (input.prevOutScript) {
-        assert.equal(input.prevOutType, 'scripthash', 'PrevOutScript must be P2SH')
+    e = d
+    d = c
+    c = rotl30(b)
+    b = a
+    a = t
+  }
 
-        var scriptHash = input.prevOutScript.chunks[1]
-        assert.deepEqual(scriptHash, redeemScript.getHash(), 'RedeemScript does not match ' + scriptHash.toString('hex'))
-      }
+  this._a = (a + this._a) | 0
+  this._b = (b + this._b) | 0
+  this._c = (c + this._c) | 0
+  this._d = (d + this._d) | 0
+  this._e = (e + this._e) | 0
+}
 
-      var scriptType = scripts.classifyOutput(redeemScript)
-      assert(scriptType in canSignTypes, 'RedeemScript not supported (' + scriptType + ')')
+Sha.prototype._hash = function () {
+  var H = new Buffer(20)
 
-      var pubKeys = []
-      switch (scriptType) {
-        case 'multisig': {
-          pubKeys = redeemScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
-          break
-        }
+  H.writeInt32BE(this._a | 0, 0)
+  H.writeInt32BE(this._b | 0, 4)
+  H.writeInt32BE(this._c | 0, 8)
+  H.writeInt32BE(this._d | 0, 12)
+  H.writeInt32BE(this._e | 0, 16)
 
-        case 'pubkeyhash': {
-          var pkh1 = redeemScript.chunks[2]
-          var pkh2 = privKey.pub.getAddress().hash
+  return H
+}
 
-          assert.deepEqual(pkh1, pkh2, 'privateKey cannot sign for this input')
-          pubKeys = [privKey.pub]
-          break
-        }
+module.exports = Sha
 
-        case 'pubkey': {
-          pubKeys = redeemScript.chunks.slice(0, 1).map(ECPubKey.fromBuffer)
-          break
-        }
-      }
+}).call(this,require("buffer").Buffer)
+},{"./hash":79,"buffer":5,"inherits":63}],82:[function(require,module,exports){
+(function (Buffer){
+/*
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
+ * in FIPS PUB 180-1
+ * Version 2.1a Copyright Paul Johnston 2000 - 2002.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for details.
+ */
 
-      if (!input.prevOutScript) {
-        input.prevOutScript = scripts.scriptHashOutput(redeemScript.getHash())
-        input.prevOutType = 'scripthash'
-      }
+var inherits = require('inherits')
+var Hash = require('./hash')
 
-      input.pubKeys = pubKeys
-      input.redeemScript = redeemScript
-      input.scriptType = scriptType
+var K = [
+  0x5a827999, 0x6ed9eba1, 0x8f1bbcdc | 0, 0xca62c1d6 | 0
+]
 
-    // cannot be pay-to-scriptHash
-    } else {
-      assert.notEqual(input.prevOutType, 'scripthash', 'PrevOutScript is P2SH, missing redeemScript')
+var W = new Array(80)
 
-      // can we otherwise sign this?
-      if (input.scriptType) {
-        assert(input.pubKeys, input.scriptType + ' not supported')
+function Sha1 () {
+  this.init()
+  this._w = W
 
-      // we know nothin' Jon Snow, assume pubKeyHash
-      } else {
-        input.prevOutScript = privKey.pub.getAddress().toOutputScript()
-        input.prevOutType = 'pubkeyhash'
-        input.pubKeys = [privKey.pub]
-        input.scriptType = input.prevOutType
-      }
-    }
+  Hash.call(this, 64, 56)
+}
+
+inherits(Sha1, Hash)
+
+Sha1.prototype.init = function () {
+  this._a = 0x67452301
+  this._b = 0xefcdab89
+  this._c = 0x98badcfe
+  this._d = 0x10325476
+  this._e = 0xc3d2e1f0
+
+  return this
+}
 
-    input.hashType = hashType
-    input.signatures = input.signatures || []
-  }
+function rotl1 (num) {
+  return (num << 1) | (num >>> 31)
+}
 
-  var signatureScript = input.redeemScript || input.prevOutScript
-  var signatureHash = this.tx.hashForSignature(index, signatureScript, hashType)
+function rotl5 (num) {
+  return (num << 5) | (num >>> 27)
+}
 
-  // enforce signature order matches public keys
-  if (input.scriptType === 'multisig' && input.redeemScript && input.signatures.length !== input.pubKeys.length) {
-    // maintain a local copy of unmatched signatures
-    var unmatched = input.signatures.slice()
+function rotl30 (num) {
+  return (num << 30) | (num >>> 2)
+}
 
-    input.signatures = input.pubKeys.map(function (pubKey) {
-      var match
+function ft (s, b, c, d) {
+  if (s === 0) return (b & c) | ((~b) & d)
+  if (s === 2) return (b & c) | (b & d) | (c & d)
+  return b ^ c ^ d
+}
 
-      // check for any matching signatures
-      unmatched.some(function (signature, i) {
-        if (!pubKey.verify(signatureHash, signature)) return false
-        match = signature
+Sha1.prototype._update = function (M) {
+  var W = this._w
 
-        // remove matched signature from unmatched
-        unmatched.splice(i, 1)
+  var a = this._a | 0
+  var b = this._b | 0
+  var c = this._c | 0
+  var d = this._d | 0
+  var e = this._e | 0
 
-        return true
-      })
+  for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4)
+  for (; i < 80; ++i) W[i] = rotl1(W[i - 3] ^ W[i - 8] ^ W[i - 14] ^ W[i - 16])
 
-      return match || undefined
-    })
+  for (var j = 0; j < 80; ++j) {
+    var s = ~~(j / 20)
+    var t = (rotl5(a) + ft(s, b, c, d) + e + W[j] + K[s]) | 0
+
+    e = d
+    d = c
+    c = rotl30(b)
+    b = a
+    a = t
   }
 
-  // enforce in order signing of public keys
-  assert(input.pubKeys.some(function (pubKey, i) {
-    if (!privKey.pub.Q.equals(pubKey.Q)) return false
+  this._a = (a + this._a) | 0
+  this._b = (b + this._b) | 0
+  this._c = (c + this._c) | 0
+  this._d = (d + this._d) | 0
+  this._e = (e + this._e) | 0
+}
 
-    assert(!input.signatures[i], 'Signature already exists')
-    var signature = privKey.sign(signatureHash)
-    input.signatures[i] = signature
+Sha1.prototype._hash = function () {
+  var H = new Buffer(20)
 
-    return true
-  }, this), 'privateKey cannot sign for this input')
+  H.writeInt32BE(this._a | 0, 0)
+  H.writeInt32BE(this._b | 0, 4)
+  H.writeInt32BE(this._c | 0, 8)
+  H.writeInt32BE(this._d | 0, 12)
+  H.writeInt32BE(this._e | 0, 16)
+
+  return H
 }
 
-module.exports = TransactionBuilder
+module.exports = Sha1
 
 }).call(this,require("buffer").Buffer)
-},{"./ecpubkey":61,"./ecsignature":62,"./opcodes":67,"./script":68,"./scripts":69,"./transaction":70,"assert":5,"buffer":7}],72:[function(require,module,exports){
+},{"./hash":79,"buffer":5,"inherits":63}],83:[function(require,module,exports){
 (function (Buffer){
-var assert = require('assert')
-var bufferutils = require('./bufferutils')
-var typeForce = require('typeforce')
-var networks = require('./networks')
-var randomBytes = require('randombytes')
+/**
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
+ * in FIPS 180-2
+ * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ *
+ */
 
-var Address = require('./address')
-var HDNode = require('./hdnode')
-var TransactionBuilder = require('./transaction_builder')
-var Script = require('./script')
+var inherits = require('inherits')
+var Sha256 = require('./sha256')
+var Hash = require('./hash')
 
-function Wallet (seed, network) {
-  console.warn('Wallet is deprecated and will be removed in 2.0.0, see #296')
+var W = new Array(64)
 
-  seed = seed || randomBytes(32)
-  network = network || networks.bitcoin
+function Sha224 () {
+  this.init()
 
-  // Stored in a closure to make accidental serialization less likely
-  var masterKey = HDNode.fromSeedBuffer(seed, network)
+  this._w = W // new Array(64)
 
-  // HD first-level child derivation method should be hardened
-  // See https://bitcointalk.org/index.php?topic=405179.msg4415254#msg4415254
-  var accountZero = masterKey.deriveHardened(0)
-  var externalAccount = accountZero.derive(0)
-  var internalAccount = accountZero.derive(1)
+  Hash.call(this, 64, 56)
+}
 
-  this.addresses = []
-  this.changeAddresses = []
-  this.network = network
-  this.unspents = []
+inherits(Sha224, Sha256)
 
-  // FIXME: remove in 2.0.0
-  this.unspentMap = {}
+Sha224.prototype.init = function () {
+  this._a = 0xc1059ed8
+  this._b = 0x367cd507
+  this._c = 0x3070dd17
+  this._d = 0xf70e5939
+  this._e = 0xffc00b31
+  this._f = 0x68581511
+  this._g = 0x64f98fa7
+  this._h = 0xbefa4fa4
 
-  // FIXME: remove in 2.0.0
-  var me = this
-  this.newMasterKey = function (seed) {
-    console.warn('newMasterKey is deprecated, please make a new Wallet instance instead')
+  return this
+}
 
-    seed = seed || randomBytes(32)
-    masterKey = HDNode.fromSeedBuffer(seed, network)
+Sha224.prototype._hash = function () {
+  var H = new Buffer(28)
 
-    accountZero = masterKey.deriveHardened(0)
-    externalAccount = accountZero.derive(0)
-    internalAccount = accountZero.derive(1)
+  H.writeInt32BE(this._a, 0)
+  H.writeInt32BE(this._b, 4)
+  H.writeInt32BE(this._c, 8)
+  H.writeInt32BE(this._d, 12)
+  H.writeInt32BE(this._e, 16)
+  H.writeInt32BE(this._f, 20)
+  H.writeInt32BE(this._g, 24)
 
-    me.addresses = []
-    me.changeAddresses = []
+  return H
+}
 
-    me.unspents = []
-    me.unspentMap = {}
-  }
+module.exports = Sha224
 
-  this.getMasterKey = function () {
-    return masterKey
-  }
-  this.getAccountZero = function () {
-    return accountZero
-  }
-  this.getExternalAccount = function () {
-    return externalAccount
-  }
-  this.getInternalAccount = function () {
-    return internalAccount
-  }
-}
+}).call(this,require("buffer").Buffer)
+},{"./hash":79,"./sha256":84,"buffer":5,"inherits":63}],84:[function(require,module,exports){
+(function (Buffer){
+/**
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined
+ * in FIPS 180-2
+ * Version 2.2-beta Copyright Angel Marin, Paul Johnston 2000 - 2009.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ *
+ */
 
-Wallet.prototype.createTransaction = function (to, value, options) {
-  // FIXME: remove in 2.0.0
-  if (typeof options !== 'object') {
-    if (options !== undefined) {
-      console.warn('Non options object parameters are deprecated, use options object instead')
+var inherits = require('inherits')
+var Hash = require('./hash')
 
-      options = {
-        fixedFee: arguments[2],
-        changeAddress: arguments[3]
-      }
-    }
-  }
+var K = [
+  0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5,
+  0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
+  0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3,
+  0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
+  0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC,
+  0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
+  0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7,
+  0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
+  0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13,
+  0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
+  0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3,
+  0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
+  0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5,
+  0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
+  0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208,
+  0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2
+]
 
-  options = options || {}
+var W = new Array(64)
 
-  assert(value > this.network.dustThreshold, value + ' must be above dust threshold (' + this.network.dustThreshold + ' Satoshis)')
+function Sha256 () {
+  this.init()
 
-  var changeAddress = options.changeAddress
-  var fixedFee = options.fixedFee
-  var minConf = options.minConf === undefined ? 0 : options.minConf // FIXME: change minConf:1 by default in 2.0.0
+  this._w = W // new Array(64)
 
-  // filter by minConf, then pending and sort by descending value
-  var unspents = this.unspents.filter(function (unspent) {
-    return unspent.confirmations >= minConf
-  }).filter(function (unspent) {
-    return !unspent.pending
-  }).sort(function (o1, o2) {
-    return o2.value - o1.value
-  })
+  Hash.call(this, 64, 56)
+}
 
-  var accum = 0
-  var addresses = []
-  var subTotal = value
+inherits(Sha256, Hash)
 
-  var txb = new TransactionBuilder()
-  txb.addOutput(to, value)
+Sha256.prototype.init = function () {
+  this._a = 0x6a09e667
+  this._b = 0xbb67ae85
+  this._c = 0x3c6ef372
+  this._d = 0xa54ff53a
+  this._e = 0x510e527f
+  this._f = 0x9b05688c
+  this._g = 0x1f83d9ab
+  this._h = 0x5be0cd19
 
-  for (var i = 0; i < unspents.length; ++i) {
-    var unspent = unspents[i]
-    addresses.push(unspent.address)
+  return this
+}
 
-    txb.addInput(unspent.txHash, unspent.index)
+function ch (x, y, z) {
+  return z ^ (x & (y ^ z))
+}
 
-    var fee = fixedFee === undefined ? estimatePaddedFee(txb.buildIncomplete(), this.network) : fixedFee
+function maj (x, y, z) {
+  return (x & y) | (z & (x | y))
+}
 
-    accum += unspent.value
-    subTotal = value + fee
+function sigma0 (x) {
+  return (x >>> 2 | x << 30) ^ (x >>> 13 | x << 19) ^ (x >>> 22 | x << 10)
+}
 
-    if (accum >= subTotal) {
-      var change = accum - subTotal
+function sigma1 (x) {
+  return (x >>> 6 | x << 26) ^ (x >>> 11 | x << 21) ^ (x >>> 25 | x << 7)
+}
 
-      if (change > this.network.dustThreshold) {
-        txb.addOutput(changeAddress || this.getChangeAddress(), change)
-      }
+function gamma0 (x) {
+  return (x >>> 7 | x << 25) ^ (x >>> 18 | x << 14) ^ (x >>> 3)
+}
 
-      break
-    }
+function gamma1 (x) {
+  return (x >>> 17 | x << 15) ^ (x >>> 19 | x << 13) ^ (x >>> 10)
+}
+
+Sha256.prototype._update = function (M) {
+  var W = this._w
+
+  var a = this._a | 0
+  var b = this._b | 0
+  var c = this._c | 0
+  var d = this._d | 0
+  var e = this._e | 0
+  var f = this._f | 0
+  var g = this._g | 0
+  var h = this._h | 0
+
+  for (var i = 0; i < 16; ++i) W[i] = M.readInt32BE(i * 4)
+  for (; i < 64; ++i) W[i] = (gamma1(W[i - 2]) + W[i - 7] + gamma0(W[i - 15]) + W[i - 16]) | 0
+
+  for (var j = 0; j < 64; ++j) {
+    var T1 = (h + sigma1(e) + ch(e, f, g) + K[j] + W[j]) | 0
+    var T2 = (sigma0(a) + maj(a, b, c)) | 0
+
+    h = g
+    g = f
+    f = e
+    e = (d + T1) | 0
+    d = c
+    c = b
+    b = a
+    a = (T1 + T2) | 0
   }
 
-  assert(accum >= subTotal, 'Not enough funds (incl. fee): ' + accum + ' < ' + subTotal)
-
-  return this.signWith(txb, addresses).build()
+  this._a = (a + this._a) | 0
+  this._b = (b + this._b) | 0
+  this._c = (c + this._c) | 0
+  this._d = (d + this._d) | 0
+  this._e = (e + this._e) | 0
+  this._f = (f + this._f) | 0
+  this._g = (g + this._g) | 0
+  this._h = (h + this._h) | 0
 }
 
-// FIXME: remove in 2.0.0
-Wallet.prototype.processPendingTx = function (tx) {
-  this.__processTx(tx, true)
-}
+Sha256.prototype._hash = function () {
+  var H = new Buffer(32)
 
-// FIXME: remove in 2.0.0
-Wallet.prototype.processConfirmedTx = function (tx) {
-  this.__processTx(tx, false)
+  H.writeInt32BE(this._a, 0)
+  H.writeInt32BE(this._b, 4)
+  H.writeInt32BE(this._c, 8)
+  H.writeInt32BE(this._d, 12)
+  H.writeInt32BE(this._e, 16)
+  H.writeInt32BE(this._f, 20)
+  H.writeInt32BE(this._g, 24)
+  H.writeInt32BE(this._h, 28)
+
+  return H
 }
 
-// FIXME: remove in 2.0.0
-Wallet.prototype.__processTx = function (tx, isPending) {
-  console.warn('processTransaction is considered harmful, see issue #260 for more information')
+module.exports = Sha256
 
-  var txId = tx.getId()
-  var txHash = tx.getHash()
+}).call(this,require("buffer").Buffer)
+},{"./hash":79,"buffer":5,"inherits":63}],85:[function(require,module,exports){
+(function (Buffer){
+var inherits = require('inherits')
+var SHA512 = require('./sha512')
+var Hash = require('./hash')
 
-  tx.outs.forEach(function (txOut, i) {
-    var address
+var W = new Array(160)
 
-    try {
-      address = Address.fromOutputScript(txOut.script, this.network).toString()
-    } catch (e) {
-      if (!(e.message.match(/has no matching Address/)))
-        throw e
-    }
+function Sha384 () {
+  this.init()
+  this._w = W
 
-    var myAddresses = this.addresses.concat(this.changeAddresses)
-    if (myAddresses.indexOf(address) > -1) {
-      var lookup = txId + ':' + i
-      if (lookup in this.unspentMap) return
+  Hash.call(this, 128, 112)
+}
 
-      // its unique, add it
-      var unspent = {
-        address: address,
-        confirmations: 0, // no way to determine this without more information
-        index: i,
-        txHash: txHash,
-        txId: txId,
-        value: txOut.value,
-        pending: isPending
-      }
+inherits(Sha384, SHA512)
 
-      this.unspentMap[lookup] = unspent
-      this.unspents.push(unspent)
-    }
-  }, this)
+Sha384.prototype.init = function () {
+  this._ah = 0xcbbb9d5d
+  this._bh = 0x629a292a
+  this._ch = 0x9159015a
+  this._dh = 0x152fecd8
+  this._eh = 0x67332667
+  this._fh = 0x8eb44a87
+  this._gh = 0xdb0c2e0d
+  this._hh = 0x47b5481d
+
+  this._al = 0xc1059ed8
+  this._bl = 0x367cd507
+  this._cl = 0x3070dd17
+  this._dl = 0xf70e5939
+  this._el = 0xffc00b31
+  this._fl = 0x68581511
+  this._gl = 0x64f98fa7
+  this._hl = 0xbefa4fa4
 
-  tx.ins.forEach(function (txIn) {
-    // copy and convert to big-endian hex
-    var txInId = bufferutils.reverse(txIn.hash).toString('hex')
+  return this
+}
 
-    var lookup = txInId + ':' + txIn.index
-    if (!(lookup in this.unspentMap)) return
+Sha384.prototype._hash = function () {
+  var H = new Buffer(48)
 
-    var unspent = this.unspentMap[lookup]
+  function writeInt64BE (h, l, offset) {
+    H.writeInt32BE(h, offset)
+    H.writeInt32BE(l, offset + 4)
+  }
 
-    if (isPending) {
-      unspent.pending = true
-      unspent.spent = true
-    } else {
-      delete this.unspentMap[lookup]
+  writeInt64BE(this._ah, this._al, 0)
+  writeInt64BE(this._bh, this._bl, 8)
+  writeInt64BE(this._ch, this._cl, 16)
+  writeInt64BE(this._dh, this._dl, 24)
+  writeInt64BE(this._eh, this._el, 32)
+  writeInt64BE(this._fh, this._fl, 40)
 
-      this.unspents = this.unspents.filter(function (unspent2) {
-        return unspent !== unspent2
-      })
-    }
-  }, this)
+  return H
 }
 
-Wallet.prototype.generateAddress = function () {
-  var k = this.addresses.length
-  var address = this.getExternalAccount().derive(k).getAddress()
-
-  this.addresses.push(address.toString())
-
-  return this.getReceiveAddress()
-}
+module.exports = Sha384
 
-Wallet.prototype.generateChangeAddress = function () {
-  var k = this.changeAddresses.length
-  var address = this.getInternalAccount().derive(k).getAddress()
+}).call(this,require("buffer").Buffer)
+},{"./hash":79,"./sha512":86,"buffer":5,"inherits":63}],86:[function(require,module,exports){
+(function (Buffer){
+var inherits = require('inherits')
+var Hash = require('./hash')
 
-  this.changeAddresses.push(address.toString())
+var K = [
+  0x428a2f98, 0xd728ae22, 0x71374491, 0x23ef65cd,
+  0xb5c0fbcf, 0xec4d3b2f, 0xe9b5dba5, 0x8189dbbc,
+  0x3956c25b, 0xf348b538, 0x59f111f1, 0xb605d019,
+  0x923f82a4, 0xaf194f9b, 0xab1c5ed5, 0xda6d8118,
+  0xd807aa98, 0xa3030242, 0x12835b01, 0x45706fbe,
+  0x243185be, 0x4ee4b28c, 0x550c7dc3, 0xd5ffb4e2,
+  0x72be5d74, 0xf27b896f, 0x80deb1fe, 0x3b1696b1,
+  0x9bdc06a7, 0x25c71235, 0xc19bf174, 0xcf692694,
+  0xe49b69c1, 0x9ef14ad2, 0xefbe4786, 0x384f25e3,
+  0x0fc19dc6, 0x8b8cd5b5, 0x240ca1cc, 0x77ac9c65,
+  0x2de92c6f, 0x592b0275, 0x4a7484aa, 0x6ea6e483,
+  0x5cb0a9dc, 0xbd41fbd4, 0x76f988da, 0x831153b5,
+  0x983e5152, 0xee66dfab, 0xa831c66d, 0x2db43210,
+  0xb00327c8, 0x98fb213f, 0xbf597fc7, 0xbeef0ee4,
+  0xc6e00bf3, 0x3da88fc2, 0xd5a79147, 0x930aa725,
+  0x06ca6351, 0xe003826f, 0x14292967, 0x0a0e6e70,
+  0x27b70a85, 0x46d22ffc, 0x2e1b2138, 0x5c26c926,
+  0x4d2c6dfc, 0x5ac42aed, 0x53380d13, 0x9d95b3df,
+  0x650a7354, 0x8baf63de, 0x766a0abb, 0x3c77b2a8,
+  0x81c2c92e, 0x47edaee6, 0x92722c85, 0x1482353b,
+  0xa2bfe8a1, 0x4cf10364, 0xa81a664b, 0xbc423001,
+  0xc24b8b70, 0xd0f89791, 0xc76c51a3, 0x0654be30,
+  0xd192e819, 0xd6ef5218, 0xd6990624, 0x5565a910,
+  0xf40e3585, 0x5771202a, 0x106aa070, 0x32bbd1b8,
+  0x19a4c116, 0xb8d2d0c8, 0x1e376c08, 0x5141ab53,
+  0x2748774c, 0xdf8eeb99, 0x34b0bcb5, 0xe19b48a8,
+  0x391c0cb3, 0xc5c95a63, 0x4ed8aa4a, 0xe3418acb,
+  0x5b9cca4f, 0x7763e373, 0x682e6ff3, 0xd6b2b8a3,
+  0x748f82ee, 0x5defb2fc, 0x78a5636f, 0x43172f60,
+  0x84c87814, 0xa1f0ab72, 0x8cc70208, 0x1a6439ec,
+  0x90befffa, 0x23631e28, 0xa4506ceb, 0xde82bde9,
+  0xbef9a3f7, 0xb2c67915, 0xc67178f2, 0xe372532b,
+  0xca273ece, 0xea26619c, 0xd186b8c7, 0x21c0c207,
+  0xeada7dd6, 0xcde0eb1e, 0xf57d4f7f, 0xee6ed178,
+  0x06f067aa, 0x72176fba, 0x0a637dc5, 0xa2c898a6,
+  0x113f9804, 0xbef90dae, 0x1b710b35, 0x131c471b,
+  0x28db77f5, 0x23047d84, 0x32caab7b, 0x40c72493,
+  0x3c9ebe0a, 0x15c9bebc, 0x431d67c4, 0x9c100d4c,
+  0x4cc5d4be, 0xcb3e42b6, 0x597f299c, 0xfc657e2a,
+  0x5fcb6fab, 0x3ad6faec, 0x6c44198c, 0x4a475817
+]
 
-  return this.getChangeAddress()
-}
+var W = new Array(160)
 
-Wallet.prototype.getAddress = function () {
-  if (this.addresses.length === 0) {
-    this.generateAddress()
-  }
+function Sha512 () {
+  this.init()
+  this._w = W
 
-  return this.addresses[this.addresses.length - 1]
+  Hash.call(this, 128, 112)
 }
 
-Wallet.prototype.getBalance = function (minConf) {
-  minConf = minConf || 0
+inherits(Sha512, Hash)
 
-  return this.unspents.filter(function (unspent) {
-    return unspent.confirmations >= minConf
+Sha512.prototype.init = function () {
+  this._ah = 0x6a09e667
+  this._bh = 0xbb67ae85
+  this._ch = 0x3c6ef372
+  this._dh = 0xa54ff53a
+  this._eh = 0x510e527f
+  this._fh = 0x9b05688c
+  this._gh = 0x1f83d9ab
+  this._hh = 0x5be0cd19
+
+  this._al = 0xf3bcc908
+  this._bl = 0x84caa73b
+  this._cl = 0xfe94f82b
+  this._dl = 0x5f1d36f1
+  this._el = 0xade682d1
+  this._fl = 0x2b3e6c1f
+  this._gl = 0xfb41bd6b
+  this._hl = 0x137e2179
 
-      // FIXME: remove spent filter in 2.0.0
-  }).filter(function (unspent) {
-    return !unspent.spent
-  }).reduce(function (accum, unspent) {
-    return accum + unspent.value
-  }, 0)
+  return this
 }
 
-Wallet.prototype.getChangeAddress = function () {
-  if (this.changeAddresses.length === 0) {
-    this.generateChangeAddress()
-  }
-
-  return this.changeAddresses[this.changeAddresses.length - 1]
+function Ch (x, y, z) {
+  return z ^ (x & (y ^ z))
 }
 
-Wallet.prototype.getInternalPrivateKey = function (index) {
-  return this.getInternalAccount().derive(index).privKey
+function maj (x, y, z) {
+  return (x & y) | (z & (x | y))
 }
 
-Wallet.prototype.getPrivateKey = function (index) {
-  return this.getExternalAccount().derive(index).privKey
+function sigma0 (x, xl) {
+  return (x >>> 28 | xl << 4) ^ (xl >>> 2 | x << 30) ^ (xl >>> 7 | x << 25)
 }
 
-Wallet.prototype.getPrivateKeyForAddress = function (address) {
-  var index
-
-  if ((index = this.addresses.indexOf(address)) > -1) {
-    return this.getPrivateKey(index)
-  }
-
-  if ((index = this.changeAddresses.indexOf(address)) > -1) {
-    return this.getInternalPrivateKey(index)
-  }
+function sigma1 (x, xl) {
+  return (x >>> 14 | xl << 18) ^ (x >>> 18 | xl << 14) ^ (xl >>> 9 | x << 23)
+}
 
-  assert(false, 'Unknown address. Make sure the address is from the keychain and has been generated')
+function Gamma0 (x, xl) {
+  return (x >>> 1 | xl << 31) ^ (x >>> 8 | xl << 24) ^ (x >>> 7)
 }
 
-Wallet.prototype.getUnspentOutputs = function (minConf) {
-  minConf = minConf || 0
+function Gamma0l (x, xl) {
+  return (x >>> 1 | xl << 31) ^ (x >>> 8 | xl << 24) ^ (x >>> 7 | xl << 25)
+}
 
-  return this.unspents.filter(function (unspent) {
-    return unspent.confirmations >= minConf
+function Gamma1 (x, xl) {
+  return (x >>> 19 | xl << 13) ^ (xl >>> 29 | x << 3) ^ (x >>> 6)
+}
 
-      // FIXME: remove spent filter in 2.0.0
-  }).filter(function (unspent) {
-    return !unspent.spent
-  }).map(function (unspent) {
-    return {
-      address: unspent.address,
-      confirmations: unspent.confirmations,
-      index: unspent.index,
-      txId: unspent.txId,
-      value: unspent.value,
+function Gamma1l (x, xl) {
+  return (x >>> 19 | xl << 13) ^ (xl >>> 29 | x << 3) ^ (x >>> 6 | xl << 26)
+}
 
-      // FIXME: remove in 2.0.0
-      hash: unspent.txId,
-      pending: unspent.pending
-    }
-  })
+function getCarry (a, b) {
+  return (a >>> 0) < (b >>> 0) ? 1 : 0
 }
 
-Wallet.prototype.setUnspentOutputs = function (unspents) {
-  this.unspentMap = {}
-  this.unspents = unspents.map(function (unspent) {
-    // FIXME: remove unspent.hash in 2.0.0
-    var txId = unspent.txId || unspent.hash
-    var index = unspent.index
+Sha512.prototype._update = function (M) {
+  var W = this._w
 
-    // FIXME: remove in 2.0.0
-    if (unspent.hash !== undefined) {
-      console.warn('unspent.hash is deprecated, use unspent.txId instead')
-    }
+  var ah = this._ah | 0
+  var bh = this._bh | 0
+  var ch = this._ch | 0
+  var dh = this._dh | 0
+  var eh = this._eh | 0
+  var fh = this._fh | 0
+  var gh = this._gh | 0
+  var hh = this._hh | 0
 
-    // FIXME: remove in 2.0.0
-    if (index === undefined) {
-      console.warn('unspent.outputIndex is deprecated, use unspent.index instead')
-      index = unspent.outputIndex
-    }
+  var al = this._al | 0
+  var bl = this._bl | 0
+  var cl = this._cl | 0
+  var dl = this._dl | 0
+  var el = this._el | 0
+  var fl = this._fl | 0
+  var gl = this._gl | 0
+  var hl = this._hl | 0
+
+  for (var i = 0; i < 32; i += 2) {
+    W[i] = M.readInt32BE(i * 4)
+    W[i + 1] = M.readInt32BE(i * 4 + 4)
+  }
+  for (; i < 160; i += 2) {
+    var xh = W[i - 15 * 2]
+    var xl = W[i - 15 * 2 + 1]
+    var gamma0 = Gamma0(xh, xl)
+    var gamma0l = Gamma0l(xl, xh)
 
-    typeForce('String', txId)
-    typeForce('Number', index)
-    typeForce('Number', unspent.value)
+    xh = W[i - 2 * 2]
+    xl = W[i - 2 * 2 + 1]
+    var gamma1 = Gamma1(xh, xl)
+    var gamma1l = Gamma1l(xl, xh)
 
-    assert.equal(txId.length, 64, 'Expected valid txId, got ' + txId)
-    assert.doesNotThrow(function () {
-      Address.fromBase58Check(unspent.address)
-    }, 'Expected Base58 Address, got ' + unspent.address)
-    assert(isFinite(index), 'Expected finite index, got ' + index)
+    // W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16]
+    var Wi7h = W[i - 7 * 2]
+    var Wi7l = W[i - 7 * 2 + 1]
 
-    // FIXME: remove branch in 2.0.0
-    if (unspent.confirmations !== undefined) {
-      typeForce('Number', unspent.confirmations)
-    }
+    var Wi16h = W[i - 16 * 2]
+    var Wi16l = W[i - 16 * 2 + 1]
 
-    var txHash = bufferutils.reverse(new Buffer(txId, 'hex'))
+    var Wil = (gamma0l + Wi7l) | 0
+    var Wih = (gamma0 + Wi7h + getCarry(Wil, gamma0l)) | 0
+    Wil = (Wil + gamma1l) | 0
+    Wih = (Wih + gamma1 + getCarry(Wil, gamma1l)) | 0
+    Wil = (Wil + Wi16l) | 0
+    Wih = (Wih + Wi16h + getCarry(Wil, Wi16l)) | 0
 
-    unspent = {
-      address: unspent.address,
-      confirmations: unspent.confirmations || 0,
-      index: index,
-      txHash: txHash,
-      txId: txId,
-      value: unspent.value,
+    W[i] = Wih
+    W[i + 1] = Wil
+  }
 
-      // FIXME: remove in 2.0.0
-      pending: unspent.pending || false
-    }
+  for (var j = 0; j < 160; j += 2) {
+    Wih = W[j]
+    Wil = W[j + 1]
 
-    // FIXME: remove in 2.0.0
-    this.unspentMap[txId + ':' + index] = unspent
+    var majh = maj(ah, bh, ch)
+    var majl = maj(al, bl, cl)
 
-    return unspent
-  }, this)
-}
+    var sigma0h = sigma0(ah, al)
+    var sigma0l = sigma0(al, ah)
+    var sigma1h = sigma1(eh, el)
+    var sigma1l = sigma1(el, eh)
 
-Wallet.prototype.signWith = function (tx, addresses) {
-  addresses.forEach(function (address, i) {
-    var privKey = this.getPrivateKeyForAddress(address)
+    // t1 = h + sigma1 + ch + K[j] + W[j]
+    var Kih = K[j]
+    var Kil = K[j + 1]
 
-    tx.sign(i, privKey)
-  }, this)
+    var chh = Ch(eh, fh, gh)
+    var chl = Ch(el, fl, gl)
 
-  return tx
-}
+    var t1l = (hl + sigma1l) | 0
+    var t1h = (hh + sigma1h + getCarry(t1l, hl)) | 0
+    t1l = (t1l + chl) | 0
+    t1h = (t1h + chh + getCarry(t1l, chl)) | 0
+    t1l = (t1l + Kil) | 0
+    t1h = (t1h + Kih + getCarry(t1l, Kil)) | 0
+    t1l = (t1l + Wil) | 0
+    t1h = (t1h + Wih + getCarry(t1l, Wil)) | 0
 
-function estimatePaddedFee (tx, network) {
-  var tmpTx = tx.clone()
-  tmpTx.addOutput(Script.EMPTY, network.dustSoftThreshold || 0)
+    // t2 = sigma0 + maj
+    var t2l = (sigma0l + majl) | 0
+    var t2h = (sigma0h + majh + getCarry(t2l, sigma0l)) | 0
 
-  return network.estimateFee(tmpTx)
+    hh = gh
+    hl = gl
+    gh = fh
+    gl = fl
+    fh = eh
+    fl = el
+    el = (dl + t1l) | 0
+    eh = (dh + t1h + getCarry(el, dl)) | 0
+    dh = ch
+    dl = cl
+    ch = bh
+    cl = bl
+    bh = ah
+    bl = al
+    al = (t1l + t2l) | 0
+    ah = (t1h + t2h + getCarry(al, t1l)) | 0
+  }
+
+  this._al = (this._al + al) | 0
+  this._bl = (this._bl + bl) | 0
+  this._cl = (this._cl + cl) | 0
+  this._dl = (this._dl + dl) | 0
+  this._el = (this._el + el) | 0
+  this._fl = (this._fl + fl) | 0
+  this._gl = (this._gl + gl) | 0
+  this._hl = (this._hl + hl) | 0
+
+  this._ah = (this._ah + ah + getCarry(this._al, al)) | 0
+  this._bh = (this._bh + bh + getCarry(this._bl, bl)) | 0
+  this._ch = (this._ch + ch + getCarry(this._cl, cl)) | 0
+  this._dh = (this._dh + dh + getCarry(this._dl, dl)) | 0
+  this._eh = (this._eh + eh + getCarry(this._el, el)) | 0
+  this._fh = (this._fh + fh + getCarry(this._fl, fl)) | 0
+  this._gh = (this._gh + gh + getCarry(this._gl, gl)) | 0
+  this._hh = (this._hh + hh + getCarry(this._hl, hl)) | 0
 }
 
-// FIXME: 1.0.0 shims, remove in 2.0.0
-Wallet.prototype.getReceiveAddress = Wallet.prototype.getAddress
-Wallet.prototype.createTx = Wallet.prototype.createTransaction
+Sha512.prototype._hash = function () {
+  var H = new Buffer(64)
 
-module.exports = Wallet
+  function writeInt64BE (h, l, offset) {
+    H.writeInt32BE(h, offset)
+    H.writeInt32BE(l, offset + 4)
+  }
 
-}).call(this,require("buffer").Buffer)
-},{"./address":54,"./bufferutils":57,"./hdnode":63,"./networks":66,"./script":68,"./transaction_builder":71,"assert":5,"buffer":7,"randombytes":52,"typeforce":53}]},{},[64])(64)
-});</script>
-        <script>bitcoin.networks.shadow = {
-  magicPrefix: '\x19ShadowCash Signed Message:\n',
-  bip32: {
-    public: 0xEE80286A,
-    private: 0xEE8031E8
-  },
-  pubKeyHash: 0x3f,
-  scriptHash: 0x7d,
-  wif: 0xbf,
-  dustThreshold: 0,
-  feePerKb: 1000,
-  estimateFee: function() { return "unused in this app" },
-};
+  writeInt64BE(this._ah, this._al, 0)
+  writeInt64BE(this._bh, this._bl, 8)
+  writeInt64BE(this._ch, this._cl, 16)
+  writeInt64BE(this._dh, this._dl, 24)
+  writeInt64BE(this._eh, this._el, 32)
+  writeInt64BE(this._fh, this._fl, 40)
+  writeInt64BE(this._gh, this._gl, 48)
+  writeInt64BE(this._hh, this._hl, 56)
 
-bitcoin.networks.shadowtn = {
-  magicPrefix: '\x19ShadowCash Signed Message:\n',
-  bip32: {
-    public: 0x76C0FDFB,
-    private: 0x76C1077A
-  },
-  pubKeyHash: 0x7f,
-  scriptHash: 0xc4,
-  wif: 0xff,
-  dustThreshold: 0,
-  feePerKb: 1000,
-  estimateFee: function() { return "unused in this app" },
-};
+  return H
+}
 
-bitcoin.networks.clam = {
-  bip32: {
-    public: 0xa8c26d64,
-    private: 0xa8c17826
-  },
-  pubKeyHash: 0x89,
-  wif: 0x85,
-};
+module.exports = Sha512
 
-bitcoin.networks.dash = {
-  bip32: {
-    public: 0x0488b21e,
-    private: 0x0488ade4
-  },
-  pubKeyHash: 0x4c,
-  scriptHash: 0x10,
-  wif: 0xcc,
-};
+}).call(this,require("buffer").Buffer)
+},{"./hash":79,"buffer":5,"inherits":63}],87:[function(require,module,exports){
+var isHexPrefixed = require('is-hex-prefixed');
 
-bitcoin.networks.namecoin = {
-  bip32: {
-    public: 0x0488b21e,
-    private: 0x0488ade4
-  },
-  pubKeyHash: 0x34,
-  //scriptHash: 0x10,
-  wif: 0x80,
-};
+/**
+ * Removes '0x' from a given `String` is present
+ * @param {String} str the string value
+ * @return {String|Optional} a string by pass if necessary
+ */
+module.exports = function stripHexPrefix(str) {
+  if (typeof str !== 'string') {
+    return str;
+  }
 
-bitcoin.networks.peercoin = {
-  bip32: {
-    public: 0x0488b21e,
-    private: 0x0488ade4
-  },
-  pubKeyHash: 0x37,
-  //scriptHash: 0x10,
-  wif: 0xb7,
-};
+  return isHexPrefixed(str) ? str.slice(2) : str;
+}
 
-</script>
+},{"is-hex-prefixed":64}]},{},[31])(31)
+});</script>
         <script>// Select components from sjcl to suit the crypto operations bip39 requires.
 
 //// base.js
@@ -16555,10 +39586,11 @@ var Mnemonic = function(language) {
 
     self.toSeed = function(mnemonic, passphrase) {
         passphrase = passphrase || '';
-        mnemonic = self.joinWords(self.splitWords(self.normalizeString(mnemonic))); // removes blanks
+        mnemonic = self.joinWords(self.splitWords(mnemonic)); // removes duplicate blanks
+        var mnemonicNormalized = self.normalizeString(mnemonic);
         passphrase = self.normalizeString(passphrase)
         passphrase = "mnemonic" + passphrase;
-        var mnemonicBits = sjcl.codec.utf8String.toBits(mnemonic);
+        var mnemonicBits = sjcl.codec.utf8String.toBits(mnemonicNormalized);
         var passphraseBits = sjcl.codec.utf8String.toBits(passphrase);
         var result = sjcl.misc.pbkdf2(mnemonicBits, passphraseBits, PBKDF2_ROUNDS, 512, hmacSHA512);
         var hashHex = sjcl.codec.hex.fromBits(result);
@@ -18648,7 +41680,7 @@ window.Entropy = new (function() {
     // mnemonics is populated as required by getLanguage
     var mnemonics = { "english": new Mnemonic("english") };
     var mnemonic = mnemonics["english"];
-    var seed = null
+    var seed = null;
     var bip32RootKey = null;
     var bip32ExtendedKey = null;
     var network = bitcoin.networks.bitcoin;
@@ -18664,8 +41696,11 @@ window.Entropy = new (function() {
     var phraseChangeTimeoutEvent = null;
     var rootKeyChangedTimeoutEvent = null;
 
+    var generationProcesses = [];
+
     var DOM = {};
     DOM.network = $(".network");
+    DOM.bip32Client = $("#bip32-client");
     DOM.phraseNetwork = $("#network-phrase");
     DOM.useEntropy = $(".use-entropy");
     DOM.entropyContainer = $(".entropy-container");
@@ -18720,6 +41755,7 @@ window.Entropy = new (function() {
     function init() {
         // Events
         DOM.network.on("change", networkChanged);
+        DOM.bip32Client.on("change", bip32ClientChanged);
         DOM.useEntropy.on("change", setEntropyVisibility);
         DOM.entropy.on("input", delayedEntropyChanged);
         DOM.entropyMnemonicLength.on("change", entropyChanged);
@@ -18745,6 +41781,7 @@ window.Entropy = new (function() {
         hidePending();
         hideValidationError();
         populateNetworkSelect();
+        populateClientSelect();
     }
 
     // Event handlers
@@ -18760,6 +41797,23 @@ window.Entropy = new (function() {
         }
     }
 
+    function bip32ClientChanged(e) {
+        var clientIndex = DOM.bip32Client.val();
+        if (clientIndex == "custom") {
+            DOM.bip32path.prop("readonly", false);
+        }
+        else {
+            DOM.bip32path.prop("readonly", true);
+            clients[clientIndex].onSelect();
+            if (seed != null) {
+                phraseChanged();
+            }
+            else {
+                rootKeyChanged();
+            }
+        }
+    }
+
     function setEntropyVisibility() {
         if (isUsingOwnEntropy()) {
             DOM.entropyContainer.removeClass("hidden");
@@ -19157,14 +42211,28 @@ window.Entropy = new (function() {
     }
 
     function displayAddresses(start, total) {
-        for (var i=0; i<total; i++) {
-            var index = i + start;
-            new TableRow(index);
-        }
+        generationProcesses.push(new (function() {
+
+            var rows = [];
+
+            this.stop = function() {
+                for (var i=0; i<rows.length; i++) {
+                    rows[i].shouldGenerate = false;
+                }
+            }
+
+            for (var i=0; i<total; i++) {
+                var index = i + start;
+                rows.push(new TableRow(index));
+            }
+
+        })());
     }
 
     function TableRow(index) {
 
+        var self = this;
+        this.shouldGenerate = true;
         var useHardenedAddresses = DOM.hardenedAddresses.prop("checked");
 
         function init() {
@@ -19173,6 +42241,9 @@ window.Entropy = new (function() {
 
         function calculateValues() {
             setTimeout(function() {
+                if (!self.shouldGenerate) {
+                    return;
+                }
                 var key = "";
                 if (useHardenedAddresses) {
                     key = bip32ExtendedKey.deriveHardened(index);
@@ -19190,6 +42261,15 @@ window.Entropy = new (function() {
                 if (useHardenedAddresses) {
                     indexText = indexText + "'";
                 }
+                // Ethereum values are different
+                if (networks[DOM.network.val()].name == "Ethereum") {
+                    var privKeyBuffer = key.privKey.d.toBuffer();
+                    privkey = privKeyBuffer.toString('hex');
+                    var addressBuffer = ethUtil.privateToAddress(privKeyBuffer);
+                    var hexAddress = addressBuffer.toString('hex');
+                    var checksumAddress = ethUtil.toChecksumAddress(hexAddress);
+                    address = ethUtil.addHexPrefix(checksumAddress);
+                }
                 addAddressToList(indexText, address, pubkey, privkey);
             }, 50)
         }
@@ -19223,6 +42303,14 @@ window.Entropy = new (function() {
 
     function clearAddressesList() {
         DOM.addresses.empty();
+        stopGenerating();
+    }
+
+    function stopGenerating() {
+        while (generationProcesses.length > 0) {
+            var generation = generationProcesses.shift();
+            generation.stop();
+        }
     }
 
     function clearKey() {
@@ -19292,6 +42380,9 @@ window.Entropy = new (function() {
         var closestWord = words[0];
         for (var i=0; i<words.length; i++) {
             var comparedTo = words[i];
+            if (comparedTo.indexOf(word) == 0) {
+                return comparedTo;
+            }
             var distance = Levenshtein.get(word, comparedTo);
             if (distance < minDistance) {
                 closestWord = comparedTo;
@@ -19317,6 +42408,16 @@ window.Entropy = new (function() {
         }
     }
 
+    function populateClientSelect() {
+        for (var i=0; i<clients.length; i++) {
+            var client = clients[i];
+            var option = $("<option>");
+            option.attr("value", i);
+            option.text(client.name);
+            DOM.bip32Client.append(option);
+        }
+    }
+
     function getLanguage() {
         var defaultLanguage = "english";
         // Try to get from existing phrase
@@ -19458,7 +42559,7 @@ window.Entropy = new (function() {
             var hash = sjcl.hash.sha256.hash(entropy.cleanStr);
             var hex = sjcl.codec.hex.fromBits(hash);
             bits = BigInteger.parse(hex, 16).toString(2);
-            for (var i=0; i<256-bits.length; i++) {
+            while (bits.length % 256 != 0) {
                 bits = "0" + bits;
             }
             // Truncate hash to suit number of words
@@ -19662,10 +42763,10 @@ window.Entropy = new (function() {
             },
         },
         {
-            name: "Litecoin",
+            name: "CLAM",
             onSelect: function() {
-                network = bitcoin.networks.litecoin;
-                DOM.bip44coin.val(2);
+                network = bitcoin.networks.clam;
+                DOM.bip44coin.val(23);
             },
         },
         {
@@ -19675,6 +42776,55 @@ window.Entropy = new (function() {
                 DOM.bip44coin.val(3);
             },
         },
+        {
+            name: "DASH",
+            onSelect: function() {
+                network = bitcoin.networks.dash;
+                DOM.bip44coin.val(5);
+            },
+        },
+        {
+            name: "Ethereum",
+            onSelect: function() {
+                network = bitcoin.networks.bitcoin;
+                DOM.bip44coin.val(60);
+            },
+        },
+        {
+            name: "GAME",
+            onSelect: function() {
+                network = bitcoin.networks.game;
+                DOM.bip44coin.val(101);
+            },
+        },
+        {
+            name: "Jumbucks",
+            onSelect: function() {
+                network = bitcoin.networks.jumbucks;
+                DOM.bip44coin.val(26);
+            },
+        },
+        {
+            name: "Litecoin",
+            onSelect: function() {
+                network = bitcoin.networks.litecoin;
+                DOM.bip44coin.val(2);
+            },
+        },
+        {
+            name: "Namecoin",
+            onSelect: function() {
+                network = bitcoin.networks.namecoin;
+                DOM.bip44coin.val(7);
+            },
+        },
+        {
+            name: "Peercoin",
+            onSelect: function() {
+                network = bitcoin.networks.peercoin;
+                DOM.bip44coin.val(6);
+            },
+        },
         {
             name: "ShadowCash",
             onSelect: function() {
@@ -19703,41 +42853,30 @@ window.Entropy = new (function() {
                 DOM.bip44coin.val(1);
             },
         },
+    ]
+
+    var clients = [
         {
-            name: "Jumbucks",
-            onSelect: function() {
-                network = bitcoin.networks.jumbucks;
-                DOM.bip44coin.val(26);
-            },
-        },
-        {
-            name: "CLAM",
-            onSelect: function() {
-                network = bitcoin.networks.clam;
-                DOM.bip44coin.val(23);
-            },
-        },
-        {
-            name: "DASH",
+            name: "Bitcoin Core",
             onSelect: function() {
-                network = bitcoin.networks.dash;
-                DOM.bip44coin.val(5);
+                DOM.bip32path.val("m/0'/0'");
+                DOM.hardenedAddresses.prop('checked', true);
             },
         },
         {
-            name: "Namecoin",
+            name: "blockchain.info",
             onSelect: function() {
-                network = bitcoin.networks.namecoin;
-                DOM.bip44coin.val(7);
+                DOM.bip32path.val("m/44'/0'/0'");
+                DOM.hardenedAddresses.prop('checked', false);
             },
         },
         {
-            name: "Peercoin",
+            name: "MultiBit HD",
             onSelect: function() {
-                network = bitcoin.networks.peercoin;
-                DOM.bip44coin.val(6);
+                DOM.bip32path.val("m/0'/0");
+                DOM.hardenedAddresses.prop('checked', false);
             },
-        },
+        }
     ]
 
     init();