[perso/Immae/Projets/Cryptomonnaies/BIP39.git] / bip39-standalone.html

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        <meta content="Mnemonic code for generating deterministic keys" name="description"/>
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        <meta content="bitcoin mnemonic converter" name="description" />
        <meta content="DC POS" name="author" />

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            body {
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    </head>
    <body>
        <div class="container">

            <h1 class="text-center">Mnemonic Code Converter</h1>
            <hr>
            <div class="row">
                <div class="col-md-12">
                    <h2>Mnemonic</h2>
                    <form class="form-horizontal" role="form">
                        <div class="col-sm-2"></div>
                        <div class="col-sm-10">
                            <p>You can enter an existing BIP39 mnemonic, or generate a new random one. Typing your own twelve words will probably not work how you expect, since the words require a particular structure (the last word is a checksum)</p>
                            <p>For more info see the <a href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki" target="_blank">BIP39 spec</a></p>
                        </div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label"></label>
                            <div class="col-sm-10">
                                <div class="form-inline">
                                    <div class="input-group-inline">
                                        <button class="btn generate">Generate</button>
                                        <span>a random</span>
                                        <select id="strength" class="strength form-control">
                                            <option value="3">3</option>
                                            <option value="6">6</option>
                                            <option value="9">9</option>
                                            <option value="12">12</option>
                                            <option value="15" selected>15</option>
                                            <option value="18">18</option>
                                            <option value="21">21</option>
                                            <option value="24">24</option>
                                        </select>
                                        word mnemonic, or enter your own below.
                                    </div>
                                </div>
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="phrase" class="col-sm-2 control-label">BIP39 Mnemonic</label>
                            <div class="col-sm-10">
                                <textarea id="phrase" class="phrase form-control"></textarea>
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="passphrase" class="col-sm-2 control-label">BIP39 Passphrase (optional)</label>
                            <div class="col-sm-10">
                                <textarea id="passphrase" class="passphrase form-control"></textarea>
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="seed" class="col-sm-2 control-label">BIP39 Seed</label>
                            <div class="col-sm-10">
                                <textarea id="seed" class="seed form-control" readonly="readonly"></textarea>
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="network-phrase" class="col-sm-2 control-label">Coin</label>
                            <div class="col-sm-10">
                                <select id="network-phrase" class="network form-control">
                                    <!-- populated by javascript -->
                                </select>
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="root-key" class="col-sm-2 control-label">BIP32 Root Key</label>
                            <div class="col-sm-10">
                                <textarea id="root-key" class="root-key form-control"></textarea>
                            </div>
                        </div>
                    </form>
                </div>
            </div>

            <hr>

            <div class="row">
                <div class="col-md-12">
                    <h2>Derivation Path</h2>
                    <ul class="derivation-type nav nav-tabs" role="tablist">
                        <li id="bip44-tab" class="active">
                            <a href="#bip44" role="tab" data-toggle="tab">BIP44</a>
                        </li>
                        <li id="bip32-tab">
                            <a href="#bip32" role="tab" data-toggle="tab">BIP32</a>
                        </li>
                    </ul>
                    <div class="derivation-type tab-content">
                        <div id="bip44" class="tab-pane active">
                            <form class="form-horizontal" role="form">
                                <br>
                                <div class="col-sm-2"></div>
                                <div class="col-sm-10">
                                    <p>For more info see the <a href="https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki" target="_blank">BIP44 spec</a></p>
                                </div>
                                <div class="form-group">
                                    <label for="purpose" class="col-sm-2 control-label">
                                        <a href="https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki#purpose" target="_blank">Purpose</a>
                                    </label>
                                    <div class="col-sm-10">
                                        <input id="purpose" type="text" class="purpose form-control" value="44">
                                    </div>
                                </div>
                                <div class="form-group">
                                    <label for="coin" class="col-sm-2 control-label">
                                        <a href="https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki#registered-coin-types" target="_blank">Coin</a>
                                    </label>
                                    <div class="col-sm-10">
                                        <input id="coin" type="text" class="coin form-control" value="0">
                                    </div>
                                </div>
                                <div class="form-group">
                                    <label for="account" class="col-sm-2 control-label">
                                        <a href="https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki#account" target="_blank">Account</a>
                                    </label>
                                    <div class="col-sm-10">
                                        <input id="account" type="text" class="account form-control" value="0">
                                    </div>
                                </div>
                                <div class="form-group">
                                    <label for="change" class="col-sm-2 control-label">
                                        <a href="https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki#change" target="_blank">External / Internal</a>
                                    </label>
                                    <div class="col-sm-10">
                                        <input id="change" type="text" class="change form-control" value="0">
                                    </div>
                                </div>
                                <div class="form-group">
                                    <label for="bip44-path" class="col-sm-2 control-label">BIP32 Derivation Path</label>
                                    <div class="col-sm-10">
                                        <input id="bip44-path" type="text" class="path form-control" value="m/44'/0'/0'/0" readonly="readonly">
                                    </div>
                                </div>
                            </form>
                        </div>
                        <div id="bip32" class="tab-pane">
                            <form class="form-horizontal" role="form">
                                <br>
                                <div class="col-sm-2"></div>
                                <div class="col-sm-10">
                                    <p>For more info see the <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-path" class="col-sm-2 control-label">BIP32 Derivation Path</label>
                                    <div class="col-sm-10">
                                        <input id="bip32-path" type="text" class="path form-control" value="m/0">
                                    </div>
                                </div>
                                <div class="form-group">
                                    <div class="col-sm-2"></div>
                                    <label class="col-sm-10">
                                        <input class="hardened-addresses" type="checkbox">
                                        Use hardened addresses
                                    </label>
                                </div>
                                <div class="form-group">
                                    <label class="col-sm-2 control-label">Hive Wallet</label>
                                    <div class="col-sm-10">
                                        <p class="form-control no-border">
                                        Use path <code>m/0'/0</code>.
                                        For more info see the <a href="https://www.hivewallet.com/" target="_blank">Hive Wallet homepage</a>
                                        </p>
                                    </div>
                                </div>
                                <div class="form-group">
                                    <label for="mycelium-path" class="col-sm-2 control-label">Mycelium Wallet</label>
                                    <div class="col-sm-10">
                                        <p class="form-control no-border">
                                        Use path <code>m/44'/0'/0'/0</code>.
                                        For more info see the <a href="http://www.mycelium.com/" target="_blank">Mycelium Wallet homepage</a>
                                        </p>
                                    </div>
                                </div>
                                <div class="form-group">
                                    <label for="core-path" class="col-sm-2 control-label">Bitcoin Core</label>
                                    <div class="col-sm-10">
                                        <p class="form-control no-border">
                                        Use path <code>m/0'/0'</code> with hardened addresses.
                                        For more info see the <a href="https://github.com/bitcoin/bitcoin/pull/8035" target="_blank">Bitcoin Core BIP32 implementation</a>
                                        </p>
                                    </div>
                                </div>
                                <div class="form-group">
                                    <label class="col-sm-2 control-label">Block Explorers</label>
                                    <div class="col-sm-10">
                                        <p class="form-control no-border">
                                        Use path <code>m/44'/0'/0'</code>.
                                        Only enter the <code>xpub</code> extended key into block explorer search fields, never the <code>xpriv</code> key.
                                        </p>
                                    </div>
                                </div>
                            </form>
                        </div>
                    </div>
                    <form class="form-horizontal" role="form">
                        <div class="form-group">
                            <label for="extended-priv-key" class="col-sm-2 control-label">BIP32 Extended Key</label>
                            <div class="col-sm-10">
                                <textarea id="extended-priv-key" class="extended-priv-key form-control" readonly="readonly"></textarea>
                            </div>
                        </div>
                        <div class="form-group">
                            <label for="extended-pub-key" class="col-sm-2 control-label">BIP32 Extended Key (addresses only)</label>
                            <div class="col-sm-10">
                                <textarea id="extended-pub-key" class="extended-pub-key form-control" readonly="readonly"></textarea>
                            </div>
                        </div>
                    </form>
                </div>
            </div>

            <hr>

            <div class="row">
                <div class="col-md-12">
                    <h2>Derived Addresses</h2>
                    <p>Note these addreses are derived from the <strong>BIP32 Extended Key</strong></p>
                    <table class="table table-striped">
                        <thead>
                            <th>
                                <div class="input-group">
                                    Path&nbsp;&nbsp;
                                    <button class="index-toggle">Toggle</button>
                                </div>
                            </th>
                            <th>
                                <div class="input-group">
                                    Address&nbsp;&nbsp;
                                    <button class="address-toggle">Toggle</button>
                                </div>
                            </th>
                            <th>
                                <div class="input-group">
                                    Private Key&nbsp;&nbsp;
                                    <button class="private-key-toggle">Toggle</button>
                                </div>
                            </th>
                        </thead>
                        <tbody class="addresses">
                            <tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>
                            <tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>
                            <tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>
                            <tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>
                            <tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>
                        </tbody>
                    </table>
                </div>
            </div>
            <span>Show next </button>
            <input type="number" class="rows-to-add" value="20">
            <button class="more">Show</button>

            <hr>

            <div class="row">
                <div class="col-md-12">
                    <h2>More info</h2>
                    <h3>BIP39 <span class="small">Mnemonic code for generating deterministic keys</span></h3>
                    <p>
                        Read more at the
                        <a href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki">official BIP39 spec</a>
                    </p>
                    <h3>BIP32 <span class="small">Hierarchical Deterministic Wallets</span></h3>
                    <p>
                        Read more at the
                        <a href="https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki" target="_blank">official BIP32 spec</a>
                        and see the demo at
                        <a href="http://bip32.org/" target="_blank">bip32.org</a>
                    </p>
                    <h3>BIP44 <span class="small">Multi-Account Hierarchy for Deterministic Wallets</span></h3>
                    <p>
                        Read more at the
                        <a href="https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki" target="_blank">official BIP44 spec</a>
                    </p>
                    <h3>Private Keys</h3>
                    <p>
                        Use private keys at
                        <a href="https://web.archive.org/web/20150707020924/https://brainwallet.org/" target="_blank">brainwallet.org</a>,
                        but be careful - it can be easy to make mistakes if you
                        don't know what you're doing
                    </p>
                </div>
            </div>

            <hr>

            <div class="row">
                <div class="col-md-12">

                    <h2>Offline Usage</h2>

                    <p>
                    You can use this tool without having to be online.
                    </p>
                    <p>
                    In your browser, select file save-as, and save this page
                    as a file.
                    </p>
                    <p>
                    Double-click that file to open it in a browser
                    on any offline computer.
                    </p>
                    <p>
                    Alternatively, download it from
                    <a href="https://github.com/dcpos/bip39">
                        https://github.com/dcpos/bip39
                    </a>

                </div>
            </div>

            <hr>

            <div class="row">
                <div class="col-md-12">

                    <h2>This project is 100% open-source code</h2>

                    <p>
                        <span>Get the source code at - </span>
                        <a href="https://github.com/dcpos/bip39" target="_blank">
                            https://github.com/dcpos/bip39
                        </a>
                    </p>

                    <h3>Libraries</h3>

                    <p>
                        <span>BitcoinJS - </span>
                        <a href="https://github.com/bitcoinjs/bitcoinjs-lib" target="_blank">
                            https://github.com/bitcoinjs/bitcoinjs-lib
                        </a>
                    </p>

                    <p>
                        <span>jsBIP39 - </span>
                        <a href="https://github.com/iancoleman/jsbip39" target="_blank">
                            https://github.com/iancoleman/jsbip39
                        </a>
                    </p>

                    <p>
                        <span>sjcl - </span>
                        <a href="https://github.com/bitwiseshiftleft/sjcl" target="_blank">
                            https://github.com/bitwiseshiftleft/sjcl
                        </a>
                    </p>

                    <p>
                        <span>jQuery - </span>
                        <a href="https://jquery.com/" target="_blank">
                            https://jquery.com/
                        </a>
                    </p>

                    <p>
                        <span>Twitter Bootstrap - </span>
                        <a href="http://getbootstrap.com/" target="_blank">
                            http://getbootstrap.com/
                        </a>
                    </p>

                </div>
            </div>

        </div>

        <div class="feedback-container">
            <div class="feedback">Loading...</div>
        </div>

        <script type="text/template" id="address-row-template">
            <tr>
                <td class="index"><span></span></td>
                <td class="address"><span></span></td>
                <td class="privkey"><span></span></td>
            </tr>
        </script>
        <script>/*! jQuery v2.1.1 | (c) 2005, 2014 jQuery Foundation, Inc. | jquery.org/license */
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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
      if (str1 === str2) return 0;
      if (str1.length === 0) return str2.length;
      if (str2.length === 0) return str1.length;

      // two rows
      var prevRow  = new Array(str2.length + 1),
          curCol, nextCol, i, j, tmp;

      // initialise previous row
      for (i=0; i<prevRow.length; ++i) {
        prevRow[i] = i;
      }

      // calculate current row distance from previous row
      for (i=0; i<str1.length; ++i) {
        nextCol = i + 1;

        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(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) 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]
}

Wallet.prototype.getInternalPrivateKey = function (index) {
  return this.getInternalAccount().derive(index).privKey
}

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 ((index = this.changeAddresses.indexOf(address)) > -1) {
    return this.getInternalPrivateKey(index)
  }

  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.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>// Select components from sjcl to suit the crypto operations bip39 requires.

//// base.js

/** @fileOverview Javascript cryptography implementation.
 *
 * Crush to remove comments, shorten variable names and
 * generally reduce transmission size.
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 */

"use strict";
/*jslint indent: 2, bitwise: false, nomen: false, plusplus: false, white: false, regexp: false */
/*global document, window, escape, unescape, module, require, Uint32Array */

/** @namespace The Stanford Javascript Crypto Library, top-level namespace. */
var sjcl = {
  /** @namespace Symmetric ciphers. */
  cipher: {},

  /** @namespace Hash functions.  Right now only SHA256 is implemented. */
  hash: {},

  /** @namespace Key exchange functions.  Right now only SRP is implemented. */
  keyexchange: {},
  
  /** @namespace Block cipher modes of operation. */
  mode: {},

  /** @namespace Miscellaneous.  HMAC and PBKDF2. */
  misc: {},
  
  /**
   * @namespace Bit array encoders and decoders.
   *
   * @description
   * The members of this namespace are functions which translate between
   * SJCL's bitArrays and other objects (usually strings).  Because it
   * isn't always clear which direction is encoding and which is decoding,
   * the method names are "fromBits" and "toBits".
   */
  codec: {},
  
  /** @namespace Exceptions. */
  exception: {
    /** @constructor Ciphertext is corrupt. */
    corrupt: function(message) {
      this.toString = function() { return "CORRUPT: "+this.message; };
      this.message = message;
    },
    
    /** @constructor Invalid parameter. */
    invalid: function(message) {
      this.toString = function() { return "INVALID: "+this.message; };
      this.message = message;
    },
    
    /** @constructor Bug or missing feature in SJCL. @constructor */
    bug: function(message) {
      this.toString = function() { return "BUG: "+this.message; };
      this.message = message;
    },

    /** @constructor Something isn't ready. */
    notReady: function(message) {
      this.toString = function() { return "NOT READY: "+this.message; };
      this.message = message;
    }
  }
};

if(typeof module !== 'undefined' && module.exports){
  module.exports = sjcl;
}
if (typeof define === "function") {
    define([], function () {
        return sjcl;
    });
}


//// bitArray.js

/** @fileOverview Arrays of bits, encoded as arrays of Numbers.
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 */

/** @namespace Arrays of bits, encoded as arrays of Numbers.
 *
 * @description
 * <p>
 * These objects are the currency accepted by SJCL's crypto functions.
 * </p>
 *
 * <p>
 * Most of our crypto primitives operate on arrays of 4-byte words internally,
 * but many of them can take arguments that are not a multiple of 4 bytes.
 * This library encodes arrays of bits (whose size need not be a multiple of 8
 * bits) as arrays of 32-bit words.  The bits are packed, big-endian, into an
 * array of words, 32 bits at a time.  Since the words are double-precision
 * floating point numbers, they fit some extra data.  We use this (in a private,
 * possibly-changing manner) to encode the number of bits actually  present
 * in the last word of the array.
 * </p>
 *
 * <p>
 * Because bitwise ops clear this out-of-band data, these arrays can be passed
 * to ciphers like AES which want arrays of words.
 * </p>
 */
sjcl.bitArray = {
  /**
   * Array slices in units of bits.
   * @param {bitArray} a The array to slice.
   * @param {Number} bstart The offset to the start of the slice, in bits.
   * @param {Number} bend The offset to the end of the slice, in bits.  If this is undefined,
   * slice until the end of the array.
   * @return {bitArray} The requested slice.
   */
  bitSlice: function (a, bstart, bend) {
    a = sjcl.bitArray._shiftRight(a.slice(bstart/32), 32 - (bstart & 31)).slice(1);
    return (bend === undefined) ? a : sjcl.bitArray.clamp(a, bend-bstart);
  },

  /**
   * Extract a number packed into a bit array.
   * @param {bitArray} a The array to slice.
   * @param {Number} bstart The offset to the start of the slice, in bits.
   * @param {Number} length The length of the number to extract.
   * @return {Number} The requested slice.
   */
  extract: function(a, bstart, blength) {
    // FIXME: this Math.floor is not necessary at all, but for some reason
    // seems to suppress a bug in the Chromium JIT.
    var x, sh = Math.floor((-bstart-blength) & 31);
    if ((bstart + blength - 1 ^ bstart) & -32) {
      // it crosses a boundary
      x = (a[bstart/32|0] << (32 - sh)) ^ (a[bstart/32+1|0] >>> sh);
    } else {
      // within a single word
      x = a[bstart/32|0] >>> sh;
    }
    return x & ((1<<blength) - 1);
  },

  /**
   * Concatenate two bit arrays.
   * @param {bitArray} a1 The first array.
   * @param {bitArray} a2 The second array.
   * @return {bitArray} The concatenation of a1 and a2.
   */
  concat: function (a1, a2) {
    if (a1.length === 0 || a2.length === 0) {
      return a1.concat(a2);
    }
    
    var last = a1[a1.length-1], shift = sjcl.bitArray.getPartial(last);
    if (shift === 32) {
      return a1.concat(a2);
    } else {
      return sjcl.bitArray._shiftRight(a2, shift, last|0, a1.slice(0,a1.length-1));
    }
  },

  /**
   * Find the length of an array of bits.
   * @param {bitArray} a The array.
   * @return {Number} The length of a, in bits.
   */
  bitLength: function (a) {
    var l = a.length, x;
    if (l === 0) { return 0; }
    x = a[l - 1];
    return (l-1) * 32 + sjcl.bitArray.getPartial(x);
  },

  /**
   * Truncate an array.
   * @param {bitArray} a The array.
   * @param {Number} len The length to truncate to, in bits.
   * @return {bitArray} A new array, truncated to len bits.
   */
  clamp: function (a, len) {
    if (a.length * 32 < len) { return a; }
    a = a.slice(0, Math.ceil(len / 32));
    var l = a.length;
    len = len & 31;
    if (l > 0 && len) {
      a[l-1] = sjcl.bitArray.partial(len, a[l-1] & 0x80000000 >> (len-1), 1);
    }
    return a;
  },

  /**
   * Make a partial word for a bit array.
   * @param {Number} len The number of bits in the word.
   * @param {Number} x The bits.
   * @param {Number} [0] _end Pass 1 if x has already been shifted to the high side.
   * @return {Number} The partial word.
   */
  partial: function (len, x, _end) {
    if (len === 32) { return x; }
    return (_end ? x|0 : x << (32-len)) + len * 0x10000000000;
  },

  /**
   * Get the number of bits used by a partial word.
   * @param {Number} x The partial word.
   * @return {Number} The number of bits used by the partial word.
   */
  getPartial: function (x) {
    return Math.round(x/0x10000000000) || 32;
  },

  /**
   * Compare two arrays for equality in a predictable amount of time.
   * @param {bitArray} a The first array.
   * @param {bitArray} b The second array.
   * @return {boolean} true if a == b; false otherwise.
   */
  equal: function (a, b) {
    if (sjcl.bitArray.bitLength(a) !== sjcl.bitArray.bitLength(b)) {
      return false;
    }
    var x = 0, i;
    for (i=0; i<a.length; i++) {
      x |= a[i]^b[i];
    }
    return (x === 0);
  },

  /** Shift an array right.
   * @param {bitArray} a The array to shift.
   * @param {Number} shift The number of bits to shift.
   * @param {Number} [carry=0] A byte to carry in
   * @param {bitArray} [out=[]] An array to prepend to the output.
   * @private
   */
  _shiftRight: function (a, shift, carry, out) {
    var i, last2=0, shift2;
    if (out === undefined) { out = []; }
    
    for (; shift >= 32; shift -= 32) {
      out.push(carry);
      carry = 0;
    }
    if (shift === 0) {
      return out.concat(a);
    }
    
    for (i=0; i<a.length; i++) {
      out.push(carry | a[i]>>>shift);
      carry = a[i] << (32-shift);
    }
    last2 = a.length ? a[a.length-1] : 0;
    shift2 = sjcl.bitArray.getPartial(last2);
    out.push(sjcl.bitArray.partial(shift+shift2 & 31, (shift + shift2 > 32) ? carry : out.pop(),1));
    return out;
  },
  
  /** xor a block of 4 words together.
   * @private
   */
  _xor4: function(x,y) {
    return [x[0]^y[0],x[1]^y[1],x[2]^y[2],x[3]^y[3]];
  },

  /** byteswap a word array inplace.
   * (does not handle partial words)
   * @param {sjcl.bitArray} a word array
   * @return {sjcl.bitArray} byteswapped array
   */
  byteswapM: function(a) {
    var i, v, m = 0xff00;
    for (i = 0; i < a.length; ++i) {
      v = a[i];
      a[i] = (v >>> 24) | ((v >>> 8) & m) | ((v & m) << 8) | (v << 24);
    }
    return a;
  }
};


//// codecString.js

/** @fileOverview Bit array codec implementations.
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 */
 
/** @namespace UTF-8 strings */
sjcl.codec.utf8String = {
  /** Convert from a bitArray to a UTF-8 string. */
  fromBits: function (arr) {
    var out = "", bl = sjcl.bitArray.bitLength(arr), i, tmp;
    for (i=0; i<bl/8; i++) {
      if ((i&3) === 0) {
        tmp = arr[i/4];
      }
      out += String.fromCharCode(tmp >>> 24);
      tmp <<= 8;
    }
    return decodeURIComponent(escape(out));
  },
  
  /** Convert from a UTF-8 string to a bitArray. */
  toBits: function (str) {
    str = unescape(encodeURIComponent(str));
    var out = [], i, tmp=0;
    for (i=0; i<str.length; i++) {
      tmp = tmp << 8 | str.charCodeAt(i);
      if ((i&3) === 3) {
        out.push(tmp);
        tmp = 0;
      }
    }
    if (i&3) {
      out.push(sjcl.bitArray.partial(8*(i&3), tmp));
    }
    return out;
  }
};


//// codecHex.js

/** @fileOverview Bit array codec implementations.
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 */

/** @namespace Hexadecimal */
sjcl.codec.hex = {
  /** Convert from a bitArray to a hex string. */
  fromBits: function (arr) {
    var out = "", i;
    for (i=0; i<arr.length; i++) {
      out += ((arr[i]|0)+0xF00000000000).toString(16).substr(4);
    }
    return out.substr(0, sjcl.bitArray.bitLength(arr)/4);//.replace(/(.{8})/g, "$1 ");
  },
  /** Convert from a hex string to a bitArray. */
  toBits: function (str) {
    var i, out=[], len;
    str = str.replace(/\s|0x/g, "");
    len = str.length;
    str = str + "00000000";
    for (i=0; i<str.length; i+=8) {
      out.push(parseInt(str.substr(i,8),16)^0);
    }
    return sjcl.bitArray.clamp(out, len*4);
  }
};


//// sha512.js

/** @fileOverview Javascript SHA-512 implementation.
 *
 * This implementation was written for CryptoJS by Jeff Mott and adapted for
 * SJCL by Stefan Thomas.
 *
 * CryptoJS (c) 2009–2012 by Jeff Mott. All rights reserved.
 * Released with New BSD License
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 * @author Jeff Mott
 * @author Stefan Thomas
 */

/**
 * Context for a SHA-512 operation in progress.
 * @constructor
 * @class Secure Hash Algorithm, 512 bits.
 */
sjcl.hash.sha512 = function (hash) {
  if (!this._key[0]) { this._precompute(); }
  if (hash) {
    this._h = hash._h.slice(0);
    this._buffer = hash._buffer.slice(0);
    this._length = hash._length;
  } else {
    this.reset();
  }
};

/**
 * Hash a string or an array of words.
 * @static
 * @param {bitArray|String} data the data to hash.
 * @return {bitArray} The hash value, an array of 16 big-endian words.
 */
sjcl.hash.sha512.hash = function (data) {
  return (new sjcl.hash.sha512()).update(data).finalize();
};

sjcl.hash.sha512.prototype = {
  /**
   * The hash's block size, in bits.
   * @constant
   */
  blockSize: 1024,
   
  /**
   * Reset the hash state.
   * @return this
   */
  reset:function () {
    this._h = this._init.slice(0);
    this._buffer = [];
    this._length = 0;
    return this;
  },
  
  /**
   * Input several words to the hash.
   * @param {bitArray|String} data the data to hash.
   * @return this
   */
  update: function (data) {
    if (typeof data === "string") {
      data = sjcl.codec.utf8String.toBits(data);
    }
    var i, b = this._buffer = sjcl.bitArray.concat(this._buffer, data),
        ol = this._length,
        nl = this._length = ol + sjcl.bitArray.bitLength(data);
    for (i = 1024+ol & -1024; i <= nl; i+= 1024) {
      this._block(b.splice(0,32));
    }
    return this;
  },
  
  /**
   * Complete hashing and output the hash value.
   * @return {bitArray} The hash value, an array of 16 big-endian words.
   */
  finalize:function () {
    var i, b = this._buffer, h = this._h;

    // Round out and push the buffer
    b = sjcl.bitArray.concat(b, [sjcl.bitArray.partial(1,1)]);

    // Round out the buffer to a multiple of 32 words, less the 4 length words.
    for (i = b.length + 4; i & 31; i++) {
      b.push(0);
    }

    // append the length
    b.push(0);
    b.push(0);
    b.push(Math.floor(this._length / 0x100000000));
    b.push(this._length | 0);

    while (b.length) {
      this._block(b.splice(0,32));
    }

    this.reset();
    return h;
  },

  /**
   * The SHA-512 initialization vector, to be precomputed.
   * @private
   */
  _init:[],

  /**
   * Least significant 24 bits of SHA512 initialization values.
   *
   * Javascript only has 53 bits of precision, so we compute the 40 most
   * significant bits and add the remaining 24 bits as constants.
   *
   * @private
   */
  _initr: [ 0xbcc908, 0xcaa73b, 0x94f82b, 0x1d36f1, 0xe682d1, 0x3e6c1f, 0x41bd6b, 0x7e2179 ],

  /*
  _init:
  [0x6a09e667, 0xf3bcc908, 0xbb67ae85, 0x84caa73b, 0x3c6ef372, 0xfe94f82b, 0xa54ff53a, 0x5f1d36f1,
   0x510e527f, 0xade682d1, 0x9b05688c, 0x2b3e6c1f, 0x1f83d9ab, 0xfb41bd6b, 0x5be0cd19, 0x137e2179],
  */

  /**
   * The SHA-512 hash key, to be precomputed.
   * @private
   */
  _key:[],

  /**
   * Least significant 24 bits of SHA512 key values.
   * @private
   */
  _keyr:
  [0x28ae22, 0xef65cd, 0x4d3b2f, 0x89dbbc, 0x48b538, 0x05d019, 0x194f9b, 0x6d8118,
   0x030242, 0x706fbe, 0xe4b28c, 0xffb4e2, 0x7b896f, 0x1696b1, 0xc71235, 0x692694,
   0xf14ad2, 0x4f25e3, 0x8cd5b5, 0xac9c65, 0x2b0275, 0xa6e483, 0x41fbd4, 0x1153b5,
   0x66dfab, 0xb43210, 0xfb213f, 0xef0ee4, 0xa88fc2, 0x0aa725, 0x03826f, 0x0e6e70,
   0xd22ffc, 0x26c926, 0xc42aed, 0x95b3df, 0xaf63de, 0x77b2a8, 0xedaee6, 0x82353b,
   0xf10364, 0x423001, 0xf89791, 0x54be30, 0xef5218, 0x65a910, 0x71202a, 0xbbd1b8,
   0xd2d0c8, 0x41ab53, 0x8eeb99, 0x9b48a8, 0xc95a63, 0x418acb, 0x63e373, 0xb2b8a3,
   0xefb2fc, 0x172f60, 0xf0ab72, 0x6439ec, 0x631e28, 0x82bde9, 0xc67915, 0x72532b,
   0x26619c, 0xc0c207, 0xe0eb1e, 0x6ed178, 0x176fba, 0xc898a6, 0xf90dae, 0x1c471b,
   0x047d84, 0xc72493, 0xc9bebc, 0x100d4c, 0x3e42b6, 0x657e2a, 0xd6faec, 0x475817],

  /*
  _key:
  [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],
  */

  /**
   * Function to precompute _init and _key.
   * @private
   */
  _precompute: function () {
    // XXX: This code is for precomputing the SHA256 constants, change for
    //      SHA512 and re-enable.
    var i = 0, prime = 2, factor;

    function frac(x)  { return (x-Math.floor(x)) * 0x100000000 | 0; }
    function frac2(x) { return (x-Math.floor(x)) * 0x10000000000 & 0xff; }

    outer: for (; i<80; prime++) {
      for (factor=2; factor*factor <= prime; factor++) {
        if (prime % factor === 0) {
          // not a prime
          continue outer;
        }
      }

      if (i<8) {
        this._init[i*2] = frac(Math.pow(prime, 1/2));
        this._init[i*2+1] = (frac2(Math.pow(prime, 1/2)) << 24) | this._initr[i];
      }
      this._key[i*2] = frac(Math.pow(prime, 1/3));
      this._key[i*2+1] = (frac2(Math.pow(prime, 1/3)) << 24) | this._keyr[i];
      i++;
    }
  },

  /**
   * Perform one cycle of SHA-512.
   * @param {bitArray} words one block of words.
   * @private
   */
  _block:function (words) {
    var i, wrh, wrl,
        w = words.slice(0),
        h = this._h,
        k = this._key,
        h0h = h[ 0], h0l = h[ 1], h1h = h[ 2], h1l = h[ 3],
        h2h = h[ 4], h2l = h[ 5], h3h = h[ 6], h3l = h[ 7],
        h4h = h[ 8], h4l = h[ 9], h5h = h[10], h5l = h[11],
        h6h = h[12], h6l = h[13], h7h = h[14], h7l = h[15];

    // Working variables
    var ah = h0h, al = h0l, bh = h1h, bl = h1l,
        ch = h2h, cl = h2l, dh = h3h, dl = h3l,
        eh = h4h, el = h4l, fh = h5h, fl = h5l,
        gh = h6h, gl = h6l, hh = h7h, hl = h7l;

    for (i=0; i<80; i++) {
      // load up the input word for this round
      if (i<16) {
        wrh = w[i * 2];
        wrl = w[i * 2 + 1];
      } else {
        // Gamma0
        var gamma0xh = w[(i-15) * 2];
        var gamma0xl = w[(i-15) * 2 + 1];
        var gamma0h =
          ((gamma0xl << 31) | (gamma0xh >>> 1)) ^
          ((gamma0xl << 24) | (gamma0xh >>> 8)) ^
           (gamma0xh >>> 7);
        var gamma0l =
          ((gamma0xh << 31) | (gamma0xl >>> 1)) ^
          ((gamma0xh << 24) | (gamma0xl >>> 8)) ^
          ((gamma0xh << 25) | (gamma0xl >>> 7));

        // Gamma1
        var gamma1xh = w[(i-2) * 2];
        var gamma1xl = w[(i-2) * 2 + 1];
        var gamma1h =
          ((gamma1xl << 13) | (gamma1xh >>> 19)) ^
          ((gamma1xh << 3)  | (gamma1xl >>> 29)) ^
           (gamma1xh >>> 6);
        var gamma1l =
          ((gamma1xh << 13) | (gamma1xl >>> 19)) ^
          ((gamma1xl << 3)  | (gamma1xh >>> 29)) ^
          ((gamma1xh << 26) | (gamma1xl >>> 6));

        // Shortcuts
        var wr7h = w[(i-7) * 2];
        var wr7l = w[(i-7) * 2 + 1];

        var wr16h = w[(i-16) * 2];
        var wr16l = w[(i-16) * 2 + 1];

        // W(round) = gamma0 + W(round - 7) + gamma1 + W(round - 16)
        wrl = gamma0l + wr7l;
        wrh = gamma0h + wr7h + ((wrl >>> 0) < (gamma0l >>> 0) ? 1 : 0);
        wrl += gamma1l;
        wrh += gamma1h + ((wrl >>> 0) < (gamma1l >>> 0) ? 1 : 0);
        wrl += wr16l;
        wrh += wr16h + ((wrl >>> 0) < (wr16l >>> 0) ? 1 : 0);
      }

      w[i*2]     = wrh |= 0;
      w[i*2 + 1] = wrl |= 0;

      // Ch
      var chh = (eh & fh) ^ (~eh & gh);
      var chl = (el & fl) ^ (~el & gl);

      // Maj
      var majh = (ah & bh) ^ (ah & ch) ^ (bh & ch);
      var majl = (al & bl) ^ (al & cl) ^ (bl & cl);

      // Sigma0
      var sigma0h = ((al << 4) | (ah >>> 28)) ^ ((ah << 30) | (al >>> 2)) ^ ((ah << 25) | (al >>> 7));
      var sigma0l = ((ah << 4) | (al >>> 28)) ^ ((al << 30) | (ah >>> 2)) ^ ((al << 25) | (ah >>> 7));

      // Sigma1
      var sigma1h = ((el << 18) | (eh >>> 14)) ^ ((el << 14) | (eh >>> 18)) ^ ((eh << 23) | (el >>> 9));
      var sigma1l = ((eh << 18) | (el >>> 14)) ^ ((eh << 14) | (el >>> 18)) ^ ((el << 23) | (eh >>> 9));

      // K(round)
      var krh = k[i*2];
      var krl = k[i*2+1];

      // t1 = h + sigma1 + ch + K(round) + W(round)
      var t1l = hl + sigma1l;
      var t1h = hh + sigma1h + ((t1l >>> 0) < (hl >>> 0) ? 1 : 0);
      t1l += chl;
      t1h += chh + ((t1l >>> 0) < (chl >>> 0) ? 1 : 0);
      t1l += krl;
      t1h += krh + ((t1l >>> 0) < (krl >>> 0) ? 1 : 0);
      t1l = t1l + wrl|0;   // FF32..FF34 perf issue https://bugzilla.mozilla.org/show_bug.cgi?id=1054972
      t1h += wrh + ((t1l >>> 0) < (wrl >>> 0) ? 1 : 0);

      // t2 = sigma0 + maj
      var t2l = sigma0l + majl;
      var t2h = sigma0h + majh + ((t2l >>> 0) < (sigma0l >>> 0) ? 1 : 0);

      // Update working variables
      hh = gh;
      hl = gl;
      gh = fh;
      gl = fl;
      fh = eh;
      fl = el;
      el = (dl + t1l) | 0;
      eh = (dh + t1h + ((el >>> 0) < (dl >>> 0) ? 1 : 0)) | 0;
      dh = ch;
      dl = cl;
      ch = bh;
      cl = bl;
      bh = ah;
      bl = al;
      al = (t1l + t2l) | 0;
      ah = (t1h + t2h + ((al >>> 0) < (t1l >>> 0) ? 1 : 0)) | 0;
    }

    // Intermediate hash
    h0l = h[1] = (h0l + al) | 0;
    h[0] = (h0h + ah + ((h0l >>> 0) < (al >>> 0) ? 1 : 0)) | 0;
    h1l = h[3] = (h1l + bl) | 0;
    h[2] = (h1h + bh + ((h1l >>> 0) < (bl >>> 0) ? 1 : 0)) | 0;
    h2l = h[5] = (h2l + cl) | 0;
    h[4] = (h2h + ch + ((h2l >>> 0) < (cl >>> 0) ? 1 : 0)) | 0;
    h3l = h[7] = (h3l + dl) | 0;
    h[6] = (h3h + dh + ((h3l >>> 0) < (dl >>> 0) ? 1 : 0)) | 0;
    h4l = h[9] = (h4l + el) | 0;
    h[8] = (h4h + eh + ((h4l >>> 0) < (el >>> 0) ? 1 : 0)) | 0;
    h5l = h[11] = (h5l + fl) | 0;
    h[10] = (h5h + fh + ((h5l >>> 0) < (fl >>> 0) ? 1 : 0)) | 0;
    h6l = h[13] = (h6l + gl) | 0;
    h[12] = (h6h + gh + ((h6l >>> 0) < (gl >>> 0) ? 1 : 0)) | 0;
    h7l = h[15] = (h7l + hl) | 0;
    h[14] = (h7h + hh + ((h7l >>> 0) < (hl >>> 0) ? 1 : 0)) | 0;
  }
};


//// hmac.js

/** @fileOverview HMAC implementation.
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 */

/** HMAC with the specified hash function.
 * @constructor
 * @param {bitArray} key the key for HMAC.
 * @param {Object} [hash=sjcl.hash.sha256] The hash function to use.
 */
sjcl.misc.hmac = function (key, Hash) {
  this._hash = Hash = Hash || sjcl.hash.sha256;
  var exKey = [[],[]], i,
      bs = Hash.prototype.blockSize / 32;
  this._baseHash = [new Hash(), new Hash()];

  if (key.length > bs) {
    key = Hash.hash(key);
  }
  
  for (i=0; i<bs; i++) {
    exKey[0][i] = key[i]^0x36363636;
    exKey[1][i] = key[i]^0x5C5C5C5C;
  }
  
  this._baseHash[0].update(exKey[0]);
  this._baseHash[1].update(exKey[1]);
  this._resultHash = new Hash(this._baseHash[0]);
};

/** HMAC with the specified hash function.  Also called encrypt since it's a prf.
 * @param {bitArray|String} data The data to mac.
 */
sjcl.misc.hmac.prototype.encrypt = sjcl.misc.hmac.prototype.mac = function (data) {
  if (!this._updated) {
    this.update(data);
    return this.digest(data);
  } else {
    throw new sjcl.exception.invalid("encrypt on already updated hmac called!");
  }
};

sjcl.misc.hmac.prototype.reset = function () {
  this._resultHash = new this._hash(this._baseHash[0]);
  this._updated = false;
};

sjcl.misc.hmac.prototype.update = function (data) {
  this._updated = true;
  this._resultHash.update(data);
};

sjcl.misc.hmac.prototype.digest = function () {
  var w = this._resultHash.finalize(), result = new (this._hash)(this._baseHash[1]).update(w).finalize();

  this.reset();

  return result;
};


//// pbkdf2.js


/** @fileOverview Password-based key-derivation function, version 2.0.
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 */

/** Password-Based Key-Derivation Function, version 2.0.
 *
 * Generate keys from passwords using PBKDF2-HMAC-SHA256.
 *
 * This is the method specified by RSA's PKCS #5 standard.
 *
 * @param {bitArray|String} password  The password.
 * @param {bitArray|String} salt The salt.  Should have lots of entropy.
 * @param {Number} [count=1000] The number of iterations.  Higher numbers make the function slower but more secure.
 * @param {Number} [length] The length of the derived key.  Defaults to the
                            output size of the hash function.
 * @param {Object} [Prff=sjcl.misc.hmac] The pseudorandom function family.
 * @return {bitArray} the derived key.
 */
sjcl.misc.pbkdf2 = function (password, salt, count, length, Prff) {
  count = count || 1000;
  
  if (length < 0 || count < 0) {
    throw sjcl.exception.invalid("invalid params to pbkdf2");
  }
  
  if (typeof password === "string") {
    password = sjcl.codec.utf8String.toBits(password);
  }
  
  if (typeof salt === "string") {
    salt = sjcl.codec.utf8String.toBits(salt);
  }
  
  Prff = Prff || sjcl.misc.hmac;
  
  var prf = new Prff(password),
      u, ui, i, j, k, out = [], b = sjcl.bitArray;

  for (k = 1; 32 * out.length < (length || 1); k++) {
    u = ui = prf.encrypt(b.concat(salt,[k]));
    
    for (i=1; i<count; i++) {
      ui = prf.encrypt(ui);
      for (j=0; j<ui.length; j++) {
        u[j] ^= ui[j];
      }
    }
    
    out = out.concat(u);
  }

  if (length) { out = b.clamp(out, length); }

  return out;
};


//// sha256.js

/** @fileOverview Javascript SHA-256 implementation.
 *
 * An older version of this implementation is available in the public
 * domain, but this one is (c) Emily Stark, Mike Hamburg, Dan Boneh,
 * Stanford University 2008-2010 and BSD-licensed for liability
 * reasons.
 *
 * Special thanks to Aldo Cortesi for pointing out several bugs in
 * this code.
 *
 * @author Emily Stark
 * @author Mike Hamburg
 * @author Dan Boneh
 */

/**
 * Context for a SHA-256 operation in progress.
 * @constructor
 * @class Secure Hash Algorithm, 256 bits.
 */
sjcl.hash.sha256 = function (hash) {
  if (!this._key[0]) { this._precompute(); }
  if (hash) {
    this._h = hash._h.slice(0);
    this._buffer = hash._buffer.slice(0);
    this._length = hash._length;
  } else {
    this.reset();
  }
};

/**
 * Hash a string or an array of words.
 * @static
 * @param {bitArray|String} data the data to hash.
 * @return {bitArray} The hash value, an array of 16 big-endian words.
 */
sjcl.hash.sha256.hash = function (data) {
  return (new sjcl.hash.sha256()).update(data).finalize();
};

sjcl.hash.sha256.prototype = {
  /**
   * The hash's block size, in bits.
   * @constant
   */
  blockSize: 512,
   
  /**
   * Reset the hash state.
   * @return this
   */
  reset:function () {
    this._h = this._init.slice(0);
    this._buffer = [];
    this._length = 0;
    return this;
  },
  
  /**
   * Input several words to the hash.
   * @param {bitArray|String} data the data to hash.
   * @return this
   */
  update: function (data) {
    if (typeof data === "string") {
      data = sjcl.codec.utf8String.toBits(data);
    }
    var i, b = this._buffer = sjcl.bitArray.concat(this._buffer, data),
        ol = this._length,
        nl = this._length = ol + sjcl.bitArray.bitLength(data);
    for (i = 512+ol & -512; i <= nl; i+= 512) {
      this._block(b.splice(0,16));
    }
    return this;
  },
  
  /**
   * Complete hashing and output the hash value.
   * @return {bitArray} The hash value, an array of 8 big-endian words.
   */
  finalize:function () {
    var i, b = this._buffer, h = this._h;

    // Round out and push the buffer
    b = sjcl.bitArray.concat(b, [sjcl.bitArray.partial(1,1)]);
    
    // Round out the buffer to a multiple of 16 words, less the 2 length words.
    for (i = b.length + 2; i & 15; i++) {
      b.push(0);
    }
    
    // append the length
    b.push(Math.floor(this._length / 0x100000000));
    b.push(this._length | 0);

    while (b.length) {
      this._block(b.splice(0,16));
    }

    this.reset();
    return h;
  },

  /**
   * The SHA-256 initialization vector, to be precomputed.
   * @private
   */
  _init:[],
  /*
  _init:[0x6a09e667,0xbb67ae85,0x3c6ef372,0xa54ff53a,0x510e527f,0x9b05688c,0x1f83d9ab,0x5be0cd19],
  */
  
  /**
   * The SHA-256 hash key, to be precomputed.
   * @private
   */
  _key:[],
  /*
  _key:
    [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],
  */


  /**
   * Function to precompute _init and _key.
   * @private
   */
  _precompute: function () {
    var i = 0, prime = 2, factor;

    function frac(x) { return (x-Math.floor(x)) * 0x100000000 | 0; }

    outer: for (; i<64; prime++) {
      for (factor=2; factor*factor <= prime; factor++) {
        if (prime % factor === 0) {
          // not a prime
          continue outer;
        }
      }
      
      if (i<8) {
        this._init[i] = frac(Math.pow(prime, 1/2));
      }
      this._key[i] = frac(Math.pow(prime, 1/3));
      i++;
    }
  },
  
  /**
   * Perform one cycle of SHA-256.
   * @param {bitArray} words one block of words.
   * @private
   */
  _block:function (words) {  
    var i, tmp, a, b,
      w = words.slice(0),
      h = this._h,
      k = this._key,
      h0 = h[0], h1 = h[1], h2 = h[2], h3 = h[3],
      h4 = h[4], h5 = h[5], h6 = h[6], h7 = h[7];

    /* Rationale for placement of |0 :
     * If a value can overflow is original 32 bits by a factor of more than a few
     * million (2^23 ish), there is a possibility that it might overflow the
     * 53-bit mantissa and lose precision.
     *
     * To avoid this, we clamp back to 32 bits by |'ing with 0 on any value that
     * propagates around the loop, and on the hash state h[].  I don't believe
     * that the clamps on h4 and on h0 are strictly necessary, but it's close
     * (for h4 anyway), and better safe than sorry.
     *
     * The clamps on h[] are necessary for the output to be correct even in the
     * common case and for short inputs.
     */
    for (i=0; i<64; i++) {
      // load up the input word for this round
      if (i<16) {
        tmp = w[i];
      } else {
        a   = w[(i+1 ) & 15];
        b   = w[(i+14) & 15];
        tmp = w[i&15] = ((a>>>7  ^ a>>>18 ^ a>>>3  ^ a<<25 ^ a<<14) + 
                         (b>>>17 ^ b>>>19 ^ b>>>10 ^ b<<15 ^ b<<13) +
                         w[i&15] + w[(i+9) & 15]) | 0;
      }
      
      tmp = (tmp + h7 + (h4>>>6 ^ h4>>>11 ^ h4>>>25 ^ h4<<26 ^ h4<<21 ^ h4<<7) +  (h6 ^ h4&(h5^h6)) + k[i]); // | 0;
      
      // shift register
      h7 = h6; h6 = h5; h5 = h4;
      h4 = h3 + tmp | 0;
      h3 = h2; h2 = h1; h1 = h0;

      h0 = (tmp +  ((h1&h2) ^ (h3&(h1^h2))) + (h1>>>2 ^ h1>>>13 ^ h1>>>22 ^ h1<<30 ^ h1<<19 ^ h1<<10)) | 0;
    }

    h[0] = h[0]+h0 | 0;
    h[1] = h[1]+h1 | 0;
    h[2] = h[2]+h2 | 0;
    h[3] = h[3]+h3 | 0;
    h[4] = h[4]+h4 | 0;
    h[5] = h[5]+h5 | 0;
    h[6] = h[6]+h6 | 0;
    h[7] = h[7]+h7 | 0;
  }
};
</script>
        <script>WORDLISTS = typeof WORDLISTS == "undefined" ? {} : WORDLISTS;
WORDLISTS["english"] = [
"abandon","ability","able","about","above","absent","absorb","abstract","absurd","abuse",
"access","accident","account","accuse","achieve","acid","acoustic","acquire","across","act",
"action","actor","actress","actual","adapt","add","addict","address","adjust","admit",
"adult","advance","advice","aerobic","affair","afford","afraid","again","age","agent",
"agree","ahead","aim","air","airport","aisle","alarm","album","alcohol","alert",
"alien","all","alley","allow","almost","alone","alpha","already","also","alter",
"always","amateur","amazing","among","amount","amused","analyst","anchor","ancient","anger",
"angle","angry","animal","ankle","announce","annual","another","answer","antenna","antique",
"anxiety","any","apart","apology","appear","apple","approve","april","arch","arctic",
"area","arena","argue","arm","armed","armor","army","around","arrange","arrest",
"arrive","arrow","art","artefact","artist","artwork","ask","aspect","assault","asset",
"assist","assume","asthma","athlete","atom","attack","attend","attitude","attract","auction",
"audit","august","aunt","author","auto","autumn","average","avocado","avoid","awake",
"aware","away","awesome","awful","awkward","axis","baby","bachelor","bacon","badge",
"bag","balance","balcony","ball","bamboo","banana","banner","bar","barely","bargain",
"barrel","base","basic","basket","battle","beach","bean","beauty","because","become",
"beef","before","begin","behave","behind","believe","below","belt","bench","benefit",
"best","betray","better","between","beyond","bicycle","bid","bike","bind","biology",
"bird","birth","bitter","black","blade","blame","blanket","blast","bleak","bless",
"blind","blood","blossom","blouse","blue","blur","blush","board","boat","body",
"boil","bomb","bone","bonus","book","boost","border","boring","borrow","boss",
"bottom","bounce","box","boy","bracket","brain","brand","brass","brave","bread",
"breeze","brick","bridge","brief","bright","bring","brisk","broccoli","broken","bronze",
"broom","brother","brown","brush","bubble","buddy","budget","buffalo","build","bulb",
"bulk","bullet","bundle","bunker","burden","burger","burst","bus","business","busy",
"butter","buyer","buzz","cabbage","cabin","cable","cactus","cage","cake","call",
"calm","camera","camp","can","canal","cancel","candy","cannon","canoe","canvas",
"canyon","capable","capital","captain","car","carbon","card","cargo","carpet","carry",
"cart","case","cash","casino","castle","casual","cat","catalog","catch","category",
"cattle","caught","cause","caution","cave","ceiling","celery","cement","census","century",
"cereal","certain","chair","chalk","champion","change","chaos","chapter","charge","chase",
"chat","cheap","check","cheese","chef","cherry","chest","chicken","chief","child",
"chimney","choice","choose","chronic","chuckle","chunk","churn","cigar","cinnamon","circle",
"citizen","city","civil","claim","clap","clarify","claw","clay","clean","clerk",
"clever","click","client","cliff","climb","clinic","clip","clock","clog","close",
"cloth","cloud","clown","club","clump","cluster","clutch","coach","coast","coconut",
"code","coffee","coil","coin","collect","color","column","combine","come","comfort",
"comic","common","company","concert","conduct","confirm","congress","connect","consider","control",
"convince","cook","cool","copper","copy","coral","core","corn","correct","cost",
"cotton","couch","country","couple","course","cousin","cover","coyote","crack","cradle",
"craft","cram","crane","crash","crater","crawl","crazy","cream","credit","creek",
"crew","cricket","crime","crisp","critic","crop","cross","crouch","crowd","crucial",
"cruel","cruise","crumble","crunch","crush","cry","crystal","cube","culture","cup",
"cupboard","curious","current","curtain","curve","cushion","custom","cute","cycle","dad",
"damage","damp","dance","danger","daring","dash","daughter","dawn","day","deal",
"debate","debris","decade","december","decide","decline","decorate","decrease","deer","defense",
"define","defy","degree","delay","deliver","demand","demise","denial","dentist","deny",
"depart","depend","deposit","depth","deputy","derive","describe","desert","design","desk",
"despair","destroy","detail","detect","develop","device","devote","diagram","dial","diamond",
"diary","dice","diesel","diet","differ","digital","dignity","dilemma","dinner","dinosaur",
"direct","dirt","disagree","discover","disease","dish","dismiss","disorder","display","distance",
"divert","divide","divorce","dizzy","doctor","document","dog","doll","dolphin","domain",
"donate","donkey","donor","door","dose","double","dove","draft","dragon","drama",
"drastic","draw","dream","dress","drift","drill","drink","drip","drive","drop",
"drum","dry","duck","dumb","dune","during","dust","dutch","duty","dwarf",
"dynamic","eager","eagle","early","earn","earth","easily","east","easy","echo",
"ecology","economy","edge","edit","educate","effort","egg","eight","either","elbow",
"elder","electric","elegant","element","elephant","elevator","elite","else","embark","embody",
"embrace","emerge","emotion","employ","empower","empty","enable","enact","end","endless",
"endorse","enemy","energy","enforce","engage","engine","enhance","enjoy","enlist","enough",
"enrich","enroll","ensure","enter","entire","entry","envelope","episode","equal","equip",
"era","erase","erode","erosion","error","erupt","escape","essay","essence","estate",
"eternal","ethics","evidence","evil","evoke","evolve","exact","example","excess","exchange",
"excite","exclude","excuse","execute","exercise","exhaust","exhibit","exile","exist","exit",
"exotic","expand","expect","expire","explain","expose","express","extend","extra","eye",
"eyebrow","fabric","face","faculty","fade","faint","faith","fall","false","fame",
"family","famous","fan","fancy","fantasy","farm","fashion","fat","fatal","father",
"fatigue","fault","favorite","feature","february","federal","fee","feed","feel","female",
"fence","festival","fetch","fever","few","fiber","fiction","field","figure","file",
"film","filter","final","find","fine","finger","finish","fire","firm","first",
"fiscal","fish","fit","fitness","fix","flag","flame","flash","flat","flavor",
"flee","flight","flip","float","flock","floor","flower","fluid","flush","fly",
"foam","focus","fog","foil","fold","follow","food","foot","force","forest",
"forget","fork","fortune","forum","forward","fossil","foster","found","fox","fragile",
"frame","frequent","fresh","friend","fringe","frog","front","frost","frown","frozen",
"fruit","fuel","fun","funny","furnace","fury","future","gadget","gain","galaxy",
"gallery","game","gap","garage","garbage","garden","garlic","garment","gas","gasp",
"gate","gather","gauge","gaze","general","genius","genre","gentle","genuine","gesture",
"ghost","giant","gift","giggle","ginger","giraffe","girl","give","glad","glance",
"glare","glass","glide","glimpse","globe","gloom","glory","glove","glow","glue",
"goat","goddess","gold","good","goose","gorilla","gospel","gossip","govern","gown",
"grab","grace","grain","grant","grape","grass","gravity","great","green","grid",
"grief","grit","grocery","group","grow","grunt","guard","guess","guide","guilt",
"guitar","gun","gym","habit","hair","half","hammer","hamster","hand","happy",
"harbor","hard","harsh","harvest","hat","have","hawk","hazard","head","health",
"heart","heavy","hedgehog","height","hello","helmet","help","hen","hero","hidden",
"high","hill","hint","hip","hire","history","hobby","hockey","hold","hole",
"holiday","hollow","home","honey","hood","hope","horn","horror","horse","hospital",
"host","hotel","hour","hover","hub","huge","human","humble","humor","hundred",
"hungry","hunt","hurdle","hurry","hurt","husband","hybrid","ice","icon","idea",
"identify","idle","ignore","ill","illegal","illness","image","imitate","immense","immune",
"impact","impose","improve","impulse","inch","include","income","increase","index","indicate",
"indoor","industry","infant","inflict","inform","inhale","inherit","initial","inject","injury",
"inmate","inner","innocent","input","inquiry","insane","insect","inside","inspire","install",
"intact","interest","into","invest","invite","involve","iron","island","isolate","issue",
"item","ivory","jacket","jaguar","jar","jazz","jealous","jeans","jelly","jewel",
"job","join","joke","journey","joy","judge","juice","jump","jungle","junior",
"junk","just","kangaroo","keen","keep","ketchup","key","kick","kid","kidney",
"kind","kingdom","kiss","kit","kitchen","kite","kitten","kiwi","knee","knife",
"knock","know","lab","label","labor","ladder","lady","lake","lamp","language",
"laptop","large","later","latin","laugh","laundry","lava","law","lawn","lawsuit",
"layer","lazy","leader","leaf","learn","leave","lecture","left","leg","legal",
"legend","leisure","lemon","lend","length","lens","leopard","lesson","letter","level",
"liar","liberty","library","license","life","lift","light","like","limb","limit",
"link","lion","liquid","list","little","live","lizard","load","loan","lobster",
"local","lock","logic","lonely","long","loop","lottery","loud","lounge","love",
"loyal","lucky","luggage","lumber","lunar","lunch","luxury","lyrics","machine","mad",
"magic","magnet","maid","mail","main","major","make","mammal","man","manage",
"mandate","mango","mansion","manual","maple","marble","march","margin","marine","market",
"marriage","mask","mass","master","match","material","math","matrix","matter","maximum",
"maze","meadow","mean","measure","meat","mechanic","medal","media","melody","melt",
"member","memory","mention","menu","mercy","merge","merit","merry","mesh","message",
"metal","method","middle","midnight","milk","million","mimic","mind","minimum","minor",
"minute","miracle","mirror","misery","miss","mistake","mix","mixed","mixture","mobile",
"model","modify","mom","moment","monitor","monkey","monster","month","moon","moral",
"more","morning","mosquito","mother","motion","motor","mountain","mouse","move","movie",
"much","muffin","mule","multiply","muscle","museum","mushroom","music","must","mutual",
"myself","mystery","myth","naive","name","napkin","narrow","nasty","nation","nature",
"near","neck","need","negative","neglect","neither","nephew","nerve","nest","net",
"network","neutral","never","news","next","nice","night","noble","noise","nominee",
"noodle","normal","north","nose","notable","note","nothing","notice","novel","now",
"nuclear","number","nurse","nut","oak","obey","object","oblige","obscure","observe",
"obtain","obvious","occur","ocean","october","odor","off","offer","office","often",
"oil","okay","old","olive","olympic","omit","once","one","onion","online",
"only","open","opera","opinion","oppose","option","orange","orbit","orchard","order",
"ordinary","organ","orient","original","orphan","ostrich","other","outdoor","outer","output",
"outside","oval","oven","over","own","owner","oxygen","oyster","ozone","pact",
"paddle","page","pair","palace","palm","panda","panel","panic","panther","paper",
"parade","parent","park","parrot","party","pass","patch","path","patient","patrol",
"pattern","pause","pave","payment","peace","peanut","pear","peasant","pelican","pen",
"penalty","pencil","people","pepper","perfect","permit","person","pet","phone","photo",
"phrase","physical","piano","picnic","picture","piece","pig","pigeon","pill","pilot",
"pink","pioneer","pipe","pistol","pitch","pizza","place","planet","plastic","plate",
"play","please","pledge","pluck","plug","plunge","poem","poet","point","polar",
"pole","police","pond","pony","pool","popular","portion","position","possible","post",
"potato","pottery","poverty","powder","power","practice","praise","predict","prefer","prepare",
"present","pretty","prevent","price","pride","primary","print","priority","prison","private",
"prize","problem","process","produce","profit","program","project","promote","proof","property",
"prosper","protect","proud","provide","public","pudding","pull","pulp","pulse","pumpkin",
"punch","pupil","puppy","purchase","purity","purpose","purse","push","put","puzzle",
"pyramid","quality","quantum","quarter","question","quick","quit","quiz","quote","rabbit",
"raccoon","race","rack","radar","radio","rail","rain","raise","rally","ramp",
"ranch","random","range","rapid","rare","rate","rather","raven","raw","razor",
"ready","real","reason","rebel","rebuild","recall","receive","recipe","record","recycle",
"reduce","reflect","reform","refuse","region","regret","regular","reject","relax","release",
"relief","rely","remain","remember","remind","remove","render","renew","rent","reopen",
"repair","repeat","replace","report","require","rescue","resemble","resist","resource","response",
"result","retire","retreat","return","reunion","reveal","review","reward","rhythm","rib",
"ribbon","rice","rich","ride","ridge","rifle","right","rigid","ring","riot",
"ripple","risk","ritual","rival","river","road","roast","robot","robust","rocket",
"romance","roof","rookie","room","rose","rotate","rough","round","route","royal",
"rubber","rude","rug","rule","run","runway","rural","sad","saddle","sadness",
"safe","sail","salad","salmon","salon","salt","salute","same","sample","sand",
"satisfy","satoshi","sauce","sausage","save","say","scale","scan","scare","scatter",
"scene","scheme","school","science","scissors","scorpion","scout","scrap","screen","script",
"scrub","sea","search","season","seat","second","secret","section","security","seed",
"seek","segment","select","sell","seminar","senior","sense","sentence","series","service",
"session","settle","setup","seven","shadow","shaft","shallow","share","shed","shell",
"sheriff","shield","shift","shine","ship","shiver","shock","shoe","shoot","shop",
"short","shoulder","shove","shrimp","shrug","shuffle","shy","sibling","sick","side",
"siege","sight","sign","silent","silk","silly","silver","similar","simple","since",
"sing","siren","sister","situate","six","size","skate","sketch","ski","skill",
"skin","skirt","skull","slab","slam","sleep","slender","slice","slide","slight",
"slim","slogan","slot","slow","slush","small","smart","smile","smoke","smooth",
"snack","snake","snap","sniff","snow","soap","soccer","social","sock","soda",
"soft","solar","soldier","solid","solution","solve","someone","song","soon","sorry",
"sort","soul","sound","soup","source","south","space","spare","spatial","spawn",
"speak","special","speed","spell","spend","sphere","spice","spider","spike","spin",
"spirit","split","spoil","sponsor","spoon","sport","spot","spray","spread","spring",
"spy","square","squeeze","squirrel","stable","stadium","staff","stage","stairs","stamp",
"stand","start","state","stay","steak","steel","stem","step","stereo","stick",
"still","sting","stock","stomach","stone","stool","story","stove","strategy","street",
"strike","strong","struggle","student","stuff","stumble","style","subject","submit","subway",
"success","such","sudden","suffer","sugar","suggest","suit","summer","sun","sunny",
"sunset","super","supply","supreme","sure","surface","surge","surprise","surround","survey",
"suspect","sustain","swallow","swamp","swap","swarm","swear","sweet","swift","swim",
"swing","switch","sword","symbol","symptom","syrup","system","table","tackle","tag",
"tail","talent","talk","tank","tape","target","task","taste","tattoo","taxi",
"teach","team","tell","ten","tenant","tennis","tent","term","test","text",
"thank","that","theme","then","theory","there","they","thing","this","thought",
"three","thrive","throw","thumb","thunder","ticket","tide","tiger","tilt","timber",
"time","tiny","tip","tired","tissue","title","toast","tobacco","today","toddler",
"toe","together","toilet","token","tomato","tomorrow","tone","tongue","tonight","tool",
"tooth","top","topic","topple","torch","tornado","tortoise","toss","total","tourist",
"toward","tower","town","toy","track","trade","traffic","tragic","train","transfer",
"trap","trash","travel","tray","treat","tree","trend","trial","tribe","trick",
"trigger","trim","trip","trophy","trouble","truck","true","truly","trumpet","trust",
"truth","try","tube","tuition","tumble","tuna","tunnel","turkey","turn","turtle",
"twelve","twenty","twice","twin","twist","two","type","typical","ugly","umbrella",
"unable","unaware","uncle","uncover","under","undo","unfair","unfold","unhappy","uniform",
"unique","unit","universe","unknown","unlock","until","unusual","unveil","update","upgrade",
"uphold","upon","upper","upset","urban","urge","usage","use","used","useful",
"useless","usual","utility","vacant","vacuum","vague","valid","valley","valve","van",
"vanish","vapor","various","vast","vault","vehicle","velvet","vendor","venture","venue",
"verb","verify","version","very","vessel","veteran","viable","vibrant","vicious","victory",
"video","view","village","vintage","violin","virtual","virus","visa","visit","visual",
"vital","vivid","vocal","voice","void","volcano","volume","vote","voyage","wage",
"wagon","wait","walk","wall","walnut","want","warfare","warm","warrior","wash",
"wasp","waste","water","wave","way","wealth","weapon","wear","weasel","weather",
"web","wedding","weekend","weird","welcome","west","wet","whale","what","wheat",
"wheel","when","where","whip","whisper","wide","width","wife","wild","will",
"win","window","wine","wing","wink","winner","winter","wire","wisdom","wise",
"wish","witness","wolf","woman","wonder","wood","wool","word","work","world",
"worry","worth","wrap","wreck","wrestle","wrist","write","wrong","yard","year",
"yellow","you","young","youth","zebra","zero","zone","zoo"]
</script>
        <script>/*
 * Copyright (c) 2013 Pavol Rusnak
 *
 * 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.
 */

/*
 * Javascript port from python by Ian Coleman
 *
 * Requires code from sjcl
 * https://github.com/bitwiseshiftleft/sjcl
 */

var Mnemonic = function(language) {

    var PBKDF2_ROUNDS = 2048;
    var RADIX = 2048;

    var self = this;
    var wordlist = [];

    var hmacSHA512 = function(key) {
        var hasher = new sjcl.misc.hmac(key, sjcl.hash.sha512);
        this.encrypt = function() {
            return hasher.encrypt.apply(hasher, arguments);
        };
    };

    function init() {
        wordlist = WORDLISTS[language];
        if (wordlist.length != RADIX) {
            err = 'Wordlist should contain ' + RADIX + ' words, but it contains ' + wordlist.length + ' words.';
            throw err;
        }
    }

    self.generate = function(strength) {
        strength = strength || 128;
        var r = strength % 32;
        if (r > 0) {
            throw 'Strength should be divisible by 32, but it is not (' + r + ').';
        }
        var hasStrongCrypto = 'crypto' in window && window['crypto'] !== null;
        if (!hasStrongCrypto) {
            throw 'Mnemonic should be generated with strong randomness, but crypto.getRandomValues is unavailable';
        }
        var buffer = new Uint8Array(strength / 8);
        var data = crypto.getRandomValues(buffer);
        return self.toMnemonic(data);
    }

    self.toMnemonic = function(byteArray) {
        if (byteArray.length % 4 > 0) {
            throw 'Data length in bits should be divisible by 32, but it is not (' + byteArray.length + ' bytes = ' + byteArray.length*8 + ' bits).'
        }

        //h = hashlib.sha256(data).hexdigest()
        var data = byteArrayToWordArray(byteArray);
        var hash = sjcl.hash.sha256.hash(data);
        var h = sjcl.codec.hex.fromBits(hash);

        // b is a binary string, eg '00111010101100...'
        //b = bin(int(binascii.hexlify(data), 16))[2:].zfill(len(data) * 8) + \
        //    bin(int(h, 16))[2:].zfill(256)[:len(data) * 8 / 32]
        //
        // a = bin(int(binascii.hexlify(data), 16))[2:].zfill(len(data) * 8)
        // c = bin(int(h, 16))[2:].zfill(256)
        // d = c[:len(data) * 8 / 32]
        var a = byteArrayToBinaryString(byteArray);
        var c = zfill(hexStringToBinaryString(h), 256);
        var d = c.substring(0, byteArray.length * 8 / 32);
        // b = line1 + line2
        var b = a + d;

        var result = [];
        var blen = b.length / 11;
        for (var i=0; i<blen; i++) {
            var idx = parseInt(b.substring(i * 11, (i + 1) * 11), 2);
            result.push(wordlist[idx]);
        }
        return result.join(' ');
    }

    self.check = function(mnemonic) {
        var mnemonic = mnemonic.split(' ')
        if (mnemonic.length % 3 > 0) {
            return false
        }
        // idx = map(lambda x: bin(self.wordlist.index(x))[2:].zfill(11), mnemonic)
        var idx = [];
        for (var i=0; i<mnemonic.length; i++) {
            var word = mnemonic[i];
            var wordIndex = wordlist.indexOf(word);
            if (wordIndex == -1) {
                return false;
            }
            var binaryIndex = zfill(wordIndex.toString(2), 11);
            idx.push(binaryIndex);
        }
        var b = idx.join('');
        var l = b.length;
        //d = b[:l / 33 * 32]
        //h = b[-l / 33:]
        var d = b.substring(0, l / 33 * 32);
        var h = b.substring(l - l / 33, l);
        //nd = binascii.unhexlify(hex(int(d, 2))[2:].rstrip('L').zfill(l / 33 * 8))
        var nd = binaryStringToWordArray(d);
        //nh = bin(int(hashlib.sha256(nd).hexdigest(), 16))[2:].zfill(256)[:l / 33]
        var ndHash = sjcl.hash.sha256.hash(nd);
        var ndHex = sjcl.codec.hex.fromBits(ndHash);
        var ndBstr = zfill(hexStringToBinaryString(ndHex), 256);
        var nh = ndBstr.substring(0,l/33);
        return h == nh;
    }

    self.toSeed = function(mnemonic, passphrase) {
        passphrase = passphrase || '';
        mnemonic = self.normalizeString(mnemonic).split(' ').filter(function(x) { return x.length; }).join(' ');
        passphrase = self.normalizeString(passphrase)
        passphrase = "mnemonic" + passphrase;
        var mnemonicBits = sjcl.codec.utf8String.toBits(mnemonic);
        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);
        return hashHex;
    }

    self.normalizeString = function(str) {
        if (typeof str.normalize == "function") {
            return str.normalize("NFKD");
        }
        else {
            // TODO decide how to handle this in the future.
            // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/normalize
            return str;
        }
    }

    function byteArrayToWordArray(data) {
        var a = [];
        for (var i=0; i<data.length/4; i++) {
            v = 0;
            v += data[i*4 + 0] << 8 * 3;
            v += data[i*4 + 1] << 8 * 2;
            v += data[i*4 + 2] << 8 * 1;
            v += data[i*4 + 3] << 8 * 0;
            a.push(v);
        }
        return a;
    }

    function byteArrayToBinaryString(data) {
        var bin = "";
        for (var i=0; i<data.length; i++) {
            bin += zfill(data[i].toString(2), 8);
        }
        return bin;
    }

    function hexStringToBinaryString(hexString) {
        binaryString = "";
        for (var i=0; i<hexString.length; i++) {
            binaryString += zfill(parseInt(hexString[i], 16).toString(2),4);
        }
        return binaryString;
    }

    function binaryStringToWordArray(binary) {
        var aLen = binary.length / 32;
        var a = [];
        for (var i=0; i<aLen; i++) {
            var valueStr = binary.substring(0,32);
            var value = parseInt(valueStr, 2);
            a.push(value);
            binary = binary.slice(32);
        }
        return a;
    }

    // Pad a numeric string on the left with zero digits until the given width
    // is reached.
    // Note this differs to the python implementation because it does not
    // handle numbers starting with a sign.
    function zfill(source, length) {
        source = source.toString();
        while (source.length < length) {
            source = '0' + source;
        }
        return source;
    }

    init();

}
</script>
        <script>(function() {

    var mnemonic = new Mnemonic("english");
    var seed = null
    var bip32RootKey = null;
    var bip32ExtendedKey = null;
    var network = bitcoin.networks.bitcoin;
    var addressRowTemplate = $("#address-row-template");

    var showIndex = true;
    var showAddress = true;
    var showPrivKey = true;

    var phraseChangeTimeoutEvent = null;
    var rootKeyChangedTimeoutEvent = null;

    var DOM = {};
    DOM.network = $(".network");
    DOM.phraseNetwork = $("#network-phrase");
    DOM.phrase = $(".phrase");
    DOM.passphrase = $(".passphrase");
    DOM.generate = $(".generate");
    DOM.seed = $(".seed");
    DOM.rootKey = $(".root-key");
    DOM.extendedPrivKey = $(".extended-priv-key");
    DOM.extendedPubKey = $(".extended-pub-key");
    DOM.bip32tab = $("#bip32-tab");
    DOM.bip44tab = $("#bip44-tab");
    DOM.bip32panel = $("#bip32");
    DOM.bip44panel = $("#bip44");
    DOM.bip32path = $("#bip32-path");
    DOM.bip44path = $("#bip44-path");
    DOM.bip44purpose = $("#bip44 .purpose");
    DOM.bip44coin = $("#bip44 .coin");
    DOM.bip44account = $("#bip44 .account");
    DOM.bip44change = $("#bip44 .change");
    DOM.strength = $(".strength");
    DOM.hardenedAddresses = $(".hardened-addresses");
    DOM.addresses = $(".addresses");
    DOM.rowsToAdd = $(".rows-to-add");
    DOM.more = $(".more");
    DOM.feedback = $(".feedback");
    DOM.tab = $(".derivation-type a");
    DOM.indexToggle = $(".index-toggle");
    DOM.addressToggle = $(".address-toggle");
    DOM.privateKeyToggle = $(".private-key-toggle");

    function init() {
        // Events
        DOM.network.on("change", networkChanged);
        DOM.phrase.on("input", delayedPhraseChanged);
        DOM.passphrase.on("input", delayedPhraseChanged);
        DOM.generate.on("click", generateClicked);
        DOM.more.on("click", showMore);
        DOM.rootKey.on("input", delayedRootKeyChanged);
        DOM.bip32path.on("input", calcForDerivationPath);
        DOM.bip44purpose.on("input", calcForDerivationPath);
        DOM.bip44coin.on("input", calcForDerivationPath);
        DOM.bip44account.on("input", calcForDerivationPath);
        DOM.bip44change.on("input", calcForDerivationPath);
        DOM.tab.on("shown.bs.tab", calcForDerivationPath);
        DOM.hardenedAddresses.on("change", calcForDerivationPath);
        DOM.indexToggle.on("click", toggleIndexes);
        DOM.addressToggle.on("click", toggleAddresses);
        DOM.privateKeyToggle.on("click", togglePrivateKeys);
        disableForms();
        hidePending();
        hideValidationError();
        populateNetworkSelect();
    }

    // Event handlers

    function networkChanged(e) {
        var networkIndex = e.target.value;
        networks[networkIndex].onSelect();
        if (seed != null) {
            phraseChanged();
        }
        else {
            rootKeyChanged();
        }
    }

    function delayedPhraseChanged() {
        hideValidationError();
        showPending();
        if (phraseChangeTimeoutEvent != null) {
            clearTimeout(phraseChangeTimeoutEvent);
        }
        phraseChangeTimeoutEvent = setTimeout(phraseChanged, 400);
    }

    function phraseChanged() {
        showPending();
        hideValidationError();
        // Get the mnemonic phrase
        var phrase = DOM.phrase.val();
        var errorText = findPhraseErrors(phrase);
        if (errorText) {
            showValidationError(errorText);
            return;
        }
        // Calculate and display
        var passphrase = DOM.passphrase.val();
        calcBip32RootKeyFromSeed(phrase, passphrase);
        calcForDerivationPath();
        hidePending();
    }

    function delayedRootKeyChanged() {
        // Warn if there is an existing mnemonic or passphrase.
        if (DOM.phrase.val().length > 0 || DOM.passphrase.val().length > 0) {
            if (!confirm("This will clear existing mnemonic and passphrase")) {
                DOM.rootKey.val(bip32RootKey);
                return
            }
        }
        hideValidationError();
        showPending();
        // Clear existing mnemonic and passphrase
        DOM.phrase.val("");
        DOM.passphrase.val("");
        seed = null;
        if (rootKeyChangedTimeoutEvent != null) {
            clearTimeout(rootKeyChangedTimeoutEvent);
        }
        rootKeyChangedTimeoutEvent = setTimeout(rootKeyChanged, 400);
    }

    function rootKeyChanged() {
        showPending();
        hideValidationError();
        // Validate the root key TODO
        var rootKeyBase58 = DOM.rootKey.val();
        var errorText = validateRootKey(rootKeyBase58);
        if (errorText) {
            showValidationError(errorText);
            return;
        }
        // Calculate and display
        calcBip32RootKeyFromBase58(rootKeyBase58);
        calcForDerivationPath();
        hidePending();
    }

    function calcForDerivationPath() {
        showPending();
        hideValidationError();
        // Get the derivation path
        var derivationPath = getDerivationPath();
        var errorText = findDerivationPathErrors(derivationPath);
        if (errorText) {
            showValidationError(errorText);
            return;
        }
        calcBip32ExtendedKey(derivationPath);
        displayBip32Info();
        hidePending();
    }

    function generateClicked() {
        clearDisplay();
        showPending();
        setTimeout(function() {
            var phrase = generateRandomPhrase();
            if (!phrase) {
                return;
            }
            phraseChanged();
        }, 50);
    }

    function toggleIndexes() {
        showIndex = !showIndex;
        $("td.index span").toggleClass("invisible");
    }

    function toggleAddresses() {
        showAddress = !showAddress;
        $("td.address span").toggleClass("invisible");
    }

    function togglePrivateKeys() {
        showPrivKey = !showPrivKey;
        $("td.privkey span").toggleClass("invisible");
    }

    // Private methods

    function generateRandomPhrase() {
        if (!hasStrongRandom()) {
            var errorText = "This browser does not support strong randomness";
            showValidationError(errorText);
            return;
        }
        var numWords = parseInt(DOM.strength.val());
        var strength = numWords / 3 * 32;
        var words = mnemonic.generate(strength);
        DOM.phrase.val(words);
        return words;
    }

    function calcBip32RootKeyFromSeed(phrase, passphrase) {
        seed = mnemonic.toSeed(phrase, passphrase);
        bip32RootKey = bitcoin.HDNode.fromSeedHex(seed, network);
    }

    function calcBip32RootKeyFromBase58(rootKeyBase58) {
        bip32RootKey = bitcoin.HDNode.fromBase58(rootKeyBase58, network);
    }

    function calcBip32ExtendedKey(path) {
        bip32ExtendedKey = bip32RootKey;
        // Derive the key from the path
        var pathBits = path.split("/");
        for (var i=0; i<pathBits.length; i++) {
            var bit = pathBits[i];
            var index = parseInt(bit);
            if (isNaN(index)) {
                continue;
            }
            var hardened = bit[bit.length-1] == "'";
            if (hardened) {
                bip32ExtendedKey = bip32ExtendedKey.deriveHardened(index);
            }
            else {
                bip32ExtendedKey = bip32ExtendedKey.derive(index);
            }
        }
    }

    function showValidationError(errorText) {
        DOM.feedback
            .text(errorText)
            .show();
    }

    function hideValidationError() {
        DOM.feedback
            .text("")
            .hide();
    }

    function findPhraseErrors(phrase) {
        // TODO make this right
        // Preprocess the words
        phrase = mnemonic.normalizeString(phrase);
        var parts = phrase.split(" ");
        var proper = [];
        for (var i=0; i<parts.length; i++) {
            var part = parts[i];
            if (part.length > 0) {
                // TODO check that lowercasing is always valid to do
                proper.push(part.toLowerCase());
            }
        }
        var properPhrase = proper.join(' ');
        // Check each word
        for (var i=0; i<proper.length; i++) {
            var word = proper[i];
            if (WORDLISTS["english"].indexOf(word) == -1) {
                console.log("Finding closest match to " + word);
                var nearestWord = findNearestWord(word);
                return word + " not in wordlist, did you mean " + nearestWord + "?";
            }
        }
        // Check the words are valid
        var isValid = mnemonic.check(properPhrase);
        if (!isValid) {
            return "Invalid mnemonic";
        }
        return false;
    }

    function validateRootKey(rootKeyBase58) {
        try {
            bitcoin.HDNode.fromBase58(rootKeyBase58);
        }
        catch (e) {
            return "Invalid root key";
        }
        return "";
    }

    function getDerivationPath() {
        if (DOM.bip44tab.hasClass("active")) {
            var purpose = parseIntNoNaN(DOM.bip44purpose.val(), 44);
            var coin = parseIntNoNaN(DOM.bip44coin.val(), 0);
            var account = parseIntNoNaN(DOM.bip44account.val(), 0);
            var change = parseIntNoNaN(DOM.bip44change.val(), 0);
            var path = "m/";
            path += purpose + "'/";
            path += coin + "'/";
            path += account + "'/";
            path += change;
            DOM.bip44path.val(path);
            var derivationPath = DOM.bip44path.val();
            console.log("Using derivation path from BIP44 tab: " + derivationPath);
            return derivationPath;
        }
        else if (DOM.bip32tab.hasClass("active")) {
            var derivationPath = DOM.bip32path.val();
            console.log("Using derivation path from BIP32 tab: " + derivationPath);
            return derivationPath;
        }
        else {
            console.log("Unknown derivation path");
        }
    }

    function findDerivationPathErrors(path) {
        // TODO is not perfect but is better than nothing
        // Inspired by
        // https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#test-vectors
        // and
        // https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#extended-keys
        var maxDepth = 255; // TODO verify this!!
        var maxIndexValue = Math.pow(2, 31); // TODO verify this!!
        if (path[0] != "m") {
            return "First character must be 'm'";
        }
        if (path.length > 1) {
            if (path[1] != "/") {
                return "Separator must be '/'";
            }
            var indexes = path.split("/");
            if (indexes.length > maxDepth) {
                return "Derivation depth is " + indexes.length + ", must be less than " + maxDepth;
            }
            for (var depth = 1; depth<indexes.length; depth++) {
                var index = indexes[depth];
                var invalidChars = index.replace(/^[0-9]+'?$/g, "")
                if (invalidChars.length > 0) {
                    return "Invalid characters " + invalidChars + " found at depth " + depth;
                }
                var indexValue = parseInt(index.replace("'", ""));
                if (isNaN(depth)) {
                    return "Invalid number at depth " + depth;
                }
                if (indexValue > maxIndexValue) {
                    return "Value of " + indexValue + " at depth " + depth + " must be less than " + maxIndexValue;
                }
            }
        }
        return false;
    }

    function displayBip32Info() {
        // Display the key
        DOM.seed.val(seed);
        var rootKey = bip32RootKey.toBase58();
        DOM.rootKey.val(rootKey);
        var extendedPrivKey = bip32ExtendedKey.toBase58();
        DOM.extendedPrivKey.val(extendedPrivKey);
        var extendedPubKey = bip32ExtendedKey.toBase58(false);
        DOM.extendedPubKey.val(extendedPubKey);
        // Display the addresses and privkeys
        clearAddressesList();
        displayAddresses(0, 20);
    }

    function displayAddresses(start, total) {
        for (var i=0; i<total; i++) {
            var index = i + start;
            new TableRow(index);
        }
    }

    function TableRow(index) {

        var useHardenedAddresses = DOM.hardenedAddresses.prop("checked");

        function init() {
            calculateValues();
        }

        function calculateValues() {
            setTimeout(function() {
                var key = "";
                if (useHardenedAddresses) {
                    key = bip32ExtendedKey.deriveHardened(index);
                }
                else {
                    key = bip32ExtendedKey.derive(index);
                }
                var address = key.getAddress().toString();
                var privkey = key.privKey.toWIF(network);
                var indexText = getDerivationPath() + "/" + index;
                if (useHardenedAddresses) {
                    indexText = indexText + "'";
                }
                addAddressToList(indexText, address, privkey);
            }, 50)
        }

        init();

    }

    function showMore() {
        var start = DOM.addresses.children().length;
        var rowsToAdd = parseInt(DOM.rowsToAdd.val());
        if (isNaN(rowsToAdd)) {
            rowsToAdd = 20;
            DOM.rowsToAdd.val("20");
        }
        if (rowsToAdd > 200) {
            var msg = "Generating " + rowsToAdd + " rows could take a while. ";
            msg += "Do you want to continue?";
            if (!confirm(msg)) {
                return;
            }
        }
        displayAddresses(start, rowsToAdd);
    }

    function clearDisplay() {
        clearAddressesList();
        clearKey();
        hideValidationError();
    }

    function clearAddressesList() {
        DOM.addresses.empty();
    }

    function clearKey() {
        DOM.rootKey.val("");
        DOM.extendedPrivKey.val("");
        DOM.extendedPubKey.val("");
    }

    function addAddressToList(indexText, address, privkey) {
        var row = $(addressRowTemplate.html());
        // Elements
        var indexCell = row.find(".index span");
        var addressCell = row.find(".address span");
        var privkeyCell = row.find(".privkey span");
        // Content
        indexCell.text(indexText);
        addressCell.text(address);
        privkeyCell.text(privkey);
        // Visibility
        if (!showIndex) {
            indexCell.addClass("invisible");
        }
        if (!showAddress) {
            addressCell.addClass("invisible");
        }
        if (!showPrivKey) {
            privkeyCell.addClass("invisible");
        }
        DOM.addresses.append(row);
    }

    function hasStrongRandom() {
        return 'crypto' in window && window['crypto'] !== null;
    }

    function disableForms() {
        $("form").on("submit", function(e) {
            e.preventDefault();
        });
    }

    function parseIntNoNaN(val, defaultVal) {
        var v = parseInt(val);
        if (isNaN(v)) {
            return defaultVal;
        }
        return v;
    }

    function showPending() {
        DOM.feedback
            .text("Calculating...")
            .show();
    }

    function findNearestWord(word) {
        var words = WORDLISTS["english"];
        var minDistance = 99;
        var closestWord = words[0];
        for (var i=0; i<words.length; i++) {
            var comparedTo = words[i];
            var distance = Levenshtein.get(word, comparedTo);
            if (distance < minDistance) {
                closestWord = comparedTo;
                minDistance = distance;
            }
        }
        return closestWord;
    }

    function hidePending() {
        DOM.feedback
            .text("")
            .hide();
    }

    function populateNetworkSelect() {
        for (var i=0; i<networks.length; i++) {
            var network = networks[i];
            var option = $("<option>");
            option.attr("value", i);
            option.text(network.name);
            DOM.phraseNetwork.append(option);
        }
    }

    var networks = [
        {
            name: "Bitcoin",
            onSelect: function() {
                network = bitcoin.networks.bitcoin;
                DOM.bip44coin.val(0);
            },
        },
        {
            name: "Bitcoin Testnet",
            onSelect: function() {
                network = bitcoin.networks.testnet;
                DOM.bip44coin.val(1);
            },
        },
        {
            name: "Litecoin",
            onSelect: function() {
                network = bitcoin.networks.litecoin;
                DOM.bip44coin.val(2);
            },
        },
        {
            name: "Dogecoin",
            onSelect: function() {
                network = bitcoin.networks.dogecoin;
                DOM.bip44coin.val(3);
            },
        },
        {
            name: "ShadowCash",
            onSelect: function() {
                network = bitcoin.networks.shadow;
                DOM.bip44coin.val(35);
            },
        },
        {
            name: "ShadowCash Testnet",
            onSelect: function() {
                network = bitcoin.networks.shadowtn;
                DOM.bip44coin.val(1);
            },
        },
        {
            name: "Viacoin",
            onSelect: function() {
                network = bitcoin.networks.viacoin;
                DOM.bip44coin.val(14);
            },
        },
        {
            name: "Viacoin Testnet",
            onSelect: function() {
                network = bitcoin.networks.viacointestnet;
                DOM.bip44coin.val(1);
            },
        },
        {
            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",
            onSelect: function() {
                network = bitcoin.networks.dash;
                DOM.bip44coin.val(5);
            },
        },
        {
            name: "Namecoin",
            onSelect: function() {
                network = bitcoin.networks.namecoin;
                DOM.bip44coin.val(7);
            },
        },
        {
            name: "Peercoin",
            onSelect: function() {
                network = bitcoin.networks.peercoin;
                DOM.bip44coin.val(6);
            },
        },
    ]

    init();

})();
</script>
    </body>
</html>