new convenient interface for creating addresses

To create an address from a public key or script, you used to have to do the
hashing yourself, and find the version yourself. For example:

var hash = bitcore.util.sha256ripe160(pubkey);
var version = bitcore.networks['livenet'].addressVersion;
var addr = new Address(version, hash);

But with this interface, things are much simpler:

var addr = Address.fromPubKey(pubkey);

The new convenience methods are:

Address.fromPubKey (for regular pubkeyhash addresses)
Address.fromPubKeys (for p2sh multisig addresses)
Address.fromScript (for any p2sh address)

Address.js

@@ -1,7 +1,9 @@
 'use strict';
 var imports = require('soop').imports();
-var parent  = imports.parent || require('./util/VersionedData');
-var networks= imports.networks || require('./networks');
+var coinUtil = imports.coinUtil || require('./util/util');
+var parent = imports.parent || require('./util/VersionedData');
+var networks = imports.networks || require('./networks');
+var Script = imports.Script || require('./Script');
 
 function Address() {
   Address.super(this, arguments);
@@ -10,6 +12,50 @@ function Address() {
 Address.parent = parent;
 parent.applyEncodingsTo(Address);
 
+//create a pubKeyHash address
+Address.fromPubKey = function(pubKey, network) {
+  if (!network)
+    network = 'livenet';
+
+  if (pubKey.length != 33 && pubKey.length != 65)
+    throw new Error('Invalid public key');
+
+  var version = networks[network].addressVersion;
+  var hash = coinUtil.sha256ripe160(pubKey);
+
+  return new Address(version, hash);
+};
+
+//create a p2sh m-of-n multisig address
+Address.fromPubKeys = function(mReq, pubKeys, network) {
+  if (!network)
+    network = 'livenet';
+
+  for (var i in pubKeys) {
+    var pubKey = pubKeys[i];
+    if (pubKey.length != 33 && pubKey.length != 65)
+      throw new Error('Invalid public key');
+  }
+
+  var version = networks[network].P2SHVersion;
+  var script = Script.createMultisig(mReq, pubKeys);
+  var buf = script.getBuffer();
+  var hash = coinUtil.sha256ripe160(buf)
+
+  return new Address(version, hash);
+};
+
+//create a p2sh address from redeemScript
+Address.fromScript = function(script, network) {
+  if (!network)
+    network = 'livenet';
+
+  var version = networks[network].P2SHVersion;
+  var buf = script.getBuffer();
+  var hash = coinUtil.sha256ripe160(buf);
+
+  return new Address(version, hash);
+};
 
 Address.prototype.validate = function() {
   this.doAsBinary(function() {

test/test.Address.js

@@ -82,5 +82,44 @@ describe('Address', function() {
     // script testnet
     new Address('2NBSBcf2KfjPEEqVusmrWdmUeNHRiUTS3Li').isScript().should.equal(true);
   });
+
+  describe('#fromPubKey', function() {
+    it('should make this pubkeyhash address from uncompressed this public key', function() {
+      var pubkey = new Buffer('04fa05ce8b25010cb6e17a30e0b66668bf083c40687547748ec330ee77adf53a42abd3d26148cbacfcf79c907ddefeb2c37f8bebc0a695ba79d634449d871de218', 'hex');
+      var hash = bitcore.util.sha256ripe160(pubkey);
+      var addr = new Address(0, hash);
+      addr.toString().should.equal(Address.fromPubKey(pubkey).toString());
+    });
+  });
+
+  describe('#fromPubKeys', function() {
+    it('should make this p2sh multisig address from these pubkeys', function() {
+      var pubkey1 = new Buffer('03e0973263b4e0d5f5f56d25d430e777ab3838ff644db972c0bf32c31da5686c27', 'hex');
+      var pubkey2 = new Buffer('0371f94c57cc013507101e30794161f4e6b9efd58a9ea68838daf429b7feac8cb2', 'hex');
+      var pubkey3 = new Buffer('032c0d2e394541e2efdc7ac3500e16e7e69df541f38670402e95aa477202fa06bb', 'hex');
+      var sortedPubKeys = [pubkey3, pubkey2, pubkey1];
+      var mReq = 2;
+      var script = bitcore.Script.createMultisig(mReq, sortedPubKeys, {noSorting: true});
+      var hash = bitcore.util.sha256ripe160(script.getBuffer());
+      var version = bitcore.networks['livenet'].P2SHVersion;
+      var addr = new Address(version, hash);
+      var addr2 = Address.fromPubKeys(mReq, sortedPubKeys);
+      addr.toString().should.equal(addr2.toString());
+    });
+  });
+
+  describe('#fromScript', function() {
+    it('should make this p2sh multisig address from these pubkeys', function() {
+      var pubkey1 = new Buffer('03e0973263b4e0d5f5f56d25d430e777ab3838ff644db972c0bf32c31da5686c27', 'hex');
+      var pubkey2 = new Buffer('0371f94c57cc013507101e30794161f4e6b9efd58a9ea68838daf429b7feac8cb2', 'hex');
+      var pubkey3 = new Buffer('032c0d2e394541e2efdc7ac3500e16e7e69df541f38670402e95aa477202fa06bb', 'hex');
+      var pubKeys = [pubkey1, pubkey2, pubkey3];
+      var mReq = 2;
+      var script = bitcore.Script.createMultisig(mReq, pubKeys);
+      var addr = Address.fromScript(script);
+      var addr2 = Address.fromPubKeys(mReq, pubKeys);
+      addr.toString().should.equal(addr2.toString());
+    });
+  });
  
 });