From bf13c95fb0a800b8d40b2c8ee0826a49b17ccd7d Mon Sep 17 00:00:00 2001
From: Pawel Cioch <pawel@greenhex.net>
Date: Tue, 16 Apr 2019 23:17:16 -0500
Subject: new Crown address format. May not be elegant solution, but bitcoinjs
 has limitation of network prefix length and I don't want to modify it. This
 approach is isolated and does not affect others

---
 src/js/bitcoinjs-extensions.js | 22 +++++++++++++++++++++-
 src/js/index.js                | 12 ++++++++++++
 tests/spec/tests.js            |  9 ++++++++-
 3 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/src/js/bitcoinjs-extensions.js b/src/js/bitcoinjs-extensions.js
index 5347e83..e4eef0c 100644
--- a/src/js/bitcoinjs-extensions.js
+++ b/src/js/bitcoinjs-extensions.js
@@ -39,7 +39,27 @@ bitcoinjs.bitcoin.networks.crown = {
   },
   pubKeyHash: 0x00,
   scriptHash: 0x05,
-  wif: 0x80
+  wif: 0x80,
+  toNewAddress: function(oldAddress)
+  {
+    var ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
+    var b58 =  basex(ALPHABET);
+
+    var addrBytes = b58.decode(oldAddress);
+
+    var hash160 = new Uint16Array(23); 
+    hash160[0]= 0x01; //C
+    hash160[1]= 0x75; //R
+    hash160[2]= 0x07; //W
+    addrBytes.copy(hash160, 3, 1, 21);
+
+    var checksum = bitcoinjs.bitcoin.crypto.hash256(hash160).subarray(0, 4);
+    var binaryAddr = new Uint16Array(27); 
+    binaryAddr.set(hash160,0);
+    checksum.copy(binaryAddr, 23, 0, 4);
+    var newAddress = b58.encode(binaryAddr);
+    return newAddress;
+  }
 };
 
 bitcoinjs.bitcoin.networks.dash = {
diff --git a/src/js/index.js b/src/js/index.js
index 057d709..8262947 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -977,6 +977,11 @@
                         address = bitcoinjs.bitcoin.address.fromOutputScript(scriptpubkey, network)
                     }
                 }
+                
+                if ((networks[DOM.network.val()].name == "CRW - Crown")) {
+                    address = bitcoinjs.bitcoin.networks.crown.toNewAddress(address);
+                }
+                
                 addAddressToList(indexText, address, pubkey, privkey);
                 if (isLast) {
                     hidePending();
@@ -1874,6 +1879,13 @@
                 setHdCoin(186);
             },
         },
+        {
+            name: "CRW - Crown (Legacy)",
+            onSelect: function() {
+                network = bitcoinjs.bitcoin.networks.crown;
+                setHdCoin(72);
+            },
+        },
         {
             name: "CRW - Crown",
             onSelect: function() {
diff --git a/tests/spec/tests.js b/tests/spec/tests.js
index d71a61c..a22d749 100644
--- a/tests/spec/tests.js
+++ b/tests/spec/tests.js
@@ -472,10 +472,17 @@ it('Allows selection of clam', function(done) {
     };
     testNetwork(done, params);
 });
+it('Allows selection of crown', function(done) {
+    var params = {
+        selectText: "CRW - Crown (Legacy)",
+        firstAddress: "18pWSwSUAQdiwMHUfFZB1fM2xue9X1FqE5", 
+    };
+    testNetwork(done, params);
+});
 it('Allows selection of crown', function(done) {
     var params = {
         selectText: "CRW - Crown",
-        firstAddress: "18pWSwSUAQdiwMHUfFZB1fM2xue9X1FqE5",
+        firstAddress: "CRWKnVmVhvH1KWTYe6sq8xV4dFGcFpBEEkPQ",
     };
     testNetwork(done, params);
 });
-- 
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