Script: add standard Script.create*ScriptPubKey

Extracts the two Script types out of Script.createOutputScript, and puts
them both under test.

Also renames Script.createMultiSigOutputScript to adhere to the same
convention.

src/script.js

@@ -356,35 +356,45 @@ Script.prototype.writeBytes = function(data) {
 /**
  * Create an output for an address
  */
-Script.createOutputScript = function(address, network) {
+Script.createScriptPubKey = function(address, network) {
   assert(address instanceof Address)
   network = network || networks.bitcoin
 
-  var script = new Script()
+  if (address.version === network.pubKeyHash) {
+    return Script.createPubKeyHashScriptPubKey(address.hash)
+  }
 
-  // Standard pay-to-script-hash
-  if (address.version === network.scriptHash) {
-    script.writeOp(Opcode.map.OP_HASH160)
-    script.writeBytes(address.hash)
-    script.writeOp(Opcode.map.OP_EQUAL)
+  assert.strictEqual(address.version, network.scriptHash, 'Unknown address type')
 
-    return script
-  }
+  return Script.createP2SHScriptPubKey(address.hash)
+}
 
-  assert.strictEqual(address.version, network.pubKeyHash, 'Unknown address type')
+// OP_DUP OP_HASH160 {pubKeyHash} OP_EQUALVERIFY OP_CHECKSIG
+Script.createPubKeyHashScriptPubKey = function(hash) {
+  var script = new Script()
 
-  // Standard pay-to-pubkey-hash
   script.writeOp(Opcode.map.OP_DUP)
   script.writeOp(Opcode.map.OP_HASH160)
-  script.writeBytes(address.hash)
+  script.writeBytes(hash)
   script.writeOp(Opcode.map.OP_EQUALVERIFY)
   script.writeOp(Opcode.map.OP_CHECKSIG)
 
   return script
 }
 
+// OP_HASH160 {scriptHash} OP_EQUAL
+Script.createP2SHScriptPubKey = function(hash) {
+  var script = new Script()
+
+  script.writeOp(Opcode.map.OP_HASH160)
+  script.writeBytes(hash)
+  script.writeOp(Opcode.map.OP_EQUAL)
+
+  return script
+}
+
 // m [pubKeys ...] n OP_CHECKMULTISIG
-Script.createMultisigOutputScript = function(m, pubKeys) {
+Script.createMultisigScriptPubKey = function(m, pubKeys) {
   var script = new Script()
   pubKeys = pubKeys.sort()
 

src/transaction.js

@@ -116,7 +116,7 @@ Transaction.prototype.addOutput = function (address, value, network) {
 
   this.outs.push(new TransactionOut({
     value: value,
-    script: Script.createOutputScript(address, network),
+    script: Script.createScriptPubKey(address, network),
     network: network
   }))
 }
@@ -373,7 +373,7 @@ Transaction.prototype.sign = function(index, key, type, network) {
   var address = key.pub.getAddress(network.pubKeyHash)
 
   // FIXME: Assumed prior TX was pay-to-pubkey-hash
-  var script = Script.createOutputScript(address, network)
+  var script = Script.createScriptPubKey(address, network)
   var signature = this.signScriptSig(index, script, key, type)
 
   var scriptSig = Script.createPubKeyHashScriptSig(signature, key.pub)

test/script.js

@@ -98,6 +98,24 @@ describe('Script', function() {
     })
   })
 
+  describe('pay-to-pubKeyHash', function() {
+    it('matches the test data', function() {
+      var address = Address.fromBase58Check('19E6FV3m3kEPoJD5Jz6dGKdKwTVvjsWUvu')
+      var script = Script.createPubKeyHashScriptPubKey(address.hash)
+
+      assert.equal(script.toHex(), pubKeyScriptPubKey)
+    })
+  })
+
+  describe('pay-to-scriptHash', function() {
+    it('matches the test data', function() {
+      var hash = new Buffer('e8c300c87986efa84c37c0519929019ef86eb5b4', 'hex')
+      var script = Script.createP2SHScriptPubKey(hash)
+
+      assert.equal(script.toHex(), p2shScriptPubKey)
+    })
+  })
+
   describe('getToAddress', function() {
     it('works for p2sh type output', function() {
       var script = Script.fromHex(p2shScriptPubKey)
@@ -129,7 +147,7 @@ describe('Script', function() {
     })
 
     it('should create valid redeemScript', function() {
-      var redeemScript = Script.createMultisigOutputScript(2, pubKeys)
+      var redeemScript = Script.createMultisigScriptPubKey(2, pubKeys)
 
       var hash160 = crypto.hash160(redeemScript.buffer)
       var multisigAddress = new Address(hash160, networks.bitcoin.scriptHash)
@@ -150,7 +168,7 @@ describe('Script', function() {
     var expected = '0047304402207515cf147d201f411092e6be5a64a6006f9308fad7b2a8fdaab22cd86ce764c202200974b8aca7bf51dbf54150d3884e1ae04f675637b926ec33bf75939446f6ca2801483045022100ef253c1faa39e65115872519e5f0a33bbecf430c0f35cf562beabbad4da24d8d02201742be8ee49812a73adea3007c9641ce6725c32cd44ddb8e3a3af460015d14050147522102359c6e3f04cefbf089cf1d6670dc47c3fb4df68e2bad1fa5a369f9ce4b42bbd1210395a9d84d47d524548f79f435758c01faec5da2b7e551d3b8c995b7e06326ae4a52ae'
 
     it('should create a valid P2SH multisig scriptSig', function() {
-      var redeemScript = Script.createMultisigOutputScript(2, pubKeys)
+      var redeemScript = Script.createMultisigScriptPubKey(2, pubKeys)
       var actual = Script.createP2SHMultisigScriptSig(signatures, redeemScript)
 
       assert.equal(b2h(actual.buffer), expected)

test/transaction.js

@@ -260,7 +260,7 @@ describe('Transaction', function() {
       })
       var pubKeys = privKeys.map(function(eck) { return eck.pub })
       var pubKeyBuffers = pubKeys.map(function(q) { return q.toBuffer() })
-      var redeemScript = Script.createMultisigOutputScript(2, pubKeyBuffers)
+      var redeemScript = Script.createMultisigScriptPubKey(2, pubKeyBuffers)
 
       var signatures = privKeys.map(function(privKey) {
         return tx.signScriptSig(0, redeemScript, privKey)