Wallet: move createTx to prototype

src/wallet.js

@@ -25,6 +25,8 @@ function Wallet(seed, network, unspents) {
   this.addresses = []
   this.changeAddresses = []
 
+  this.network = network
+
   // Transaction output data
   this.outputs = unspents ? processUnspentOutputs(unspents) : {}
 
@@ -100,8 +102,42 @@ function Wallet(seed, network, unspents) {
     })
   }
 
-  this.createTx = function(to, value, fixedFee, changeAddress) {
-    assert(value > network.dustThreshold, value + ' must be above dust threshold (' + network.dustThreshold + ' Satoshis)')
+  this.getMasterKey = function() { return masterkey }
+  this.getAccountZero = function() { return accountZero }
+  this.getInternalAccount = function() { return internalAccount }
+  this.getExternalAccount = function() { return externalAccount }
+
+  this.getPrivateKeyForAddress = function(address) {
+    assert(isMyAddress(address), 'Unknown address. Make sure the address is from the keychain and has been generated')
+
+    if (isReceiveAddress(address)) {
+      var index = this.addresses.indexOf(address)
+
+      return this.getPrivateKey(index)
+    }
+
+    if (isChangeAddress(address)) {
+      var index = this.changeAddresses.indexOf(address)
+
+      return this.getInternalPrivateKey(index)
+    }
+  }
+
+  function isReceiveAddress(address){
+    return me.addresses.indexOf(address) > -1
+  }
+
+  function isChangeAddress(address){
+    return me.changeAddresses.indexOf(address) > -1
+  }
+
+  function isMyAddress(address) {
+    return isReceiveAddress(address) || isChangeAddress(address)
+  }
+}
+
+Wallet.prototype.createTx = function(to, value, fixedFee, changeAddress) {
+  assert(value > this.network.dustThreshold, value + ' must be above dust threshold (' + this.network.dustThreshold + ' Satoshis)')
 
   var utxos = getCandidateOutputs(this.outputs, value)
   var accum = 0
@@ -118,14 +154,14 @@ function Wallet(seed, network, unspents) {
     var outpoint = utxo.from.split(':')
     tx.addInput(outpoint[0], parseInt(outpoint[1]))
 
-      var fee = fixedFee == undefined ? estimatePaddedFee(tx, network) : fixedFee
+    var fee = fixedFee == undefined ? estimatePaddedFee(tx, this.network) : fixedFee
 
     accum += utxo.value
     subTotal = value + fee
     if (accum >= subTotal) {
       var change = accum - subTotal
 
-        if (change > network.dustThreshold) {
+      if (change > this.network.dustThreshold) {
         tx.addOutput(changeAddress || this.getChangeAddress(), change)
       }
 
@@ -139,48 +175,6 @@ function Wallet(seed, network, unspents) {
   return tx
 }
 
-  this.getMasterKey = function() { return masterkey }
-  this.getAccountZero = function() { return accountZero }
-  this.getInternalAccount = function() { return internalAccount }
-  this.getExternalAccount = function() { return externalAccount }
-
-  this.getPrivateKey = function(index) {
-    return externalAccount.derive(index).privKey
-  }
-
-  this.getInternalPrivateKey = function(index) {
-    return internalAccount.derive(index).privKey
-  }
-
-  this.getPrivateKeyForAddress = function(address) {
-    assert(isMyAddress(address), 'Unknown address. Make sure the address is from the keychain and has been generated')
-
-    if (isReceiveAddress(address)) {
-      var index = this.addresses.indexOf(address)
-
-      return this.getPrivateKey(index)
-    }
-
-    if (isChangeAddress(address)) {
-      var index = this.changeAddresses.indexOf(address)
-
-      return this.getInternalPrivateKey(index)
-    }
-  }
-
-  function isReceiveAddress(address){
-    return me.addresses.indexOf(address) > -1
-  }
-
-  function isChangeAddress(address){
-    return me.changeAddresses.indexOf(address) > -1
-  }
-
-  function isMyAddress(address) {
-    return isReceiveAddress(address) || isChangeAddress(address)
-  }
-}
-
 Wallet.prototype.generateAddress = function() {
   var k = this.addresses.length
   var address = this.getExternalAccount().derive(k).getAddress()
@@ -213,6 +207,14 @@ Wallet.prototype.getChangeAddress = function() {
   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.getReceiveAddress = function() {
   if (this.addresses.length === 0) {
     this.generateAddress()