allow Transaction.to take array

lib/transaction/transaction.js

@@ -480,6 +480,14 @@ Transaction.prototype._newTransaction = function() {
 
 /* Transaction creation interface */
 
+/**
+ * @typedef {Object} Transaction~fromObject
+ * @property {string} prevTxId
+ * @property {number} outputIndex
+ * @property {(Buffer|string|Script)} script
+ * @property {number} satoshis
+ */
+
 /**
  * Add an input to this transaction. This is a high level interface
  * to add an input, for more control, use @{link Transaction#addInput}.
@@ -517,7 +525,7 @@ Transaction.prototype._newTransaction = function() {
  *                  ['03000...', '02000...'], 2);
  * ```
  *
- * @param {Object} utxo
+ * @param {(Array.<Transaction~fromObject>|Transaction~fromObject)} utxo
  * @param {Array=} pubkeys
  * @param {number=} threshold
  */
@@ -691,17 +699,31 @@ Transaction.prototype.getChangeOutput = function() {
   return null;
 };
 
+/**
+ * @typedef {Object} Transaction~toObject
+ * @property {(string|Address)} address
+ * @property {number} satoshis
+ */
+
 /**
  * Add an output to the transaction.
  *
  * Beware that this resets all the signatures for inputs (in further versions,
  * SIGHASH_SINGLE or SIGHASH_NONE signatures will not be reset).
  *
- * @param {string|Address} address
+ * @param {(string|Address|Array.<Transaction~toObject>)} address
  * @param {number} amount in satoshis
  * @return {Transaction} this, for chaining
  */
 Transaction.prototype.to = function(address, amount) {
+  if (_.isArray(address)) {
+    var self = this;
+    _.each(address, function(to) {
+      self.to(to.address, to.satoshis);
+    });
+    return this;
+  }
+
   $.checkArgument(
     JSUtil.isNaturalNumber(amount),
     'Amount is expected to be a positive integer'

test/transaction/transaction.js

@@ -41,7 +41,8 @@ describe('Transaction', function() {
       'outputIndex': 0,
       'script': testScript,
       'satoshis': testAmount
-    }).to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
+    })
+    .to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
 
   it('can serialize to a plain javascript object', function() {
     var object = testTransaction.toObject();
@@ -162,7 +163,7 @@ describe('Transaction', function() {
       it('works for normal p2pkh', function() {
         var transaction = new Transaction()
           .from(simpleUtxoWith100000Satoshis)
-          .to(toAddress, 50000)
+          .to([{address: toAddress, satoshis: 50000}])
           .change(changeAddress)
           .sign(privateKey);
         transaction.isFullySigned().should.equal(true);
@@ -500,7 +501,8 @@ describe('Transaction', function() {
           'outputIndex': 0,
           'script': testScript,
           'satoshis': testAmount
-        }).to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
+        })
+        .to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
 
       tx.outputs[0]._satoshis = 100;
       tx.outputs[0]._satoshisBN = new BN('fffffffffffffff', 16);
@@ -515,7 +517,8 @@ describe('Transaction', function() {
           'outputIndex': 0,
           'script': testScript,
           'satoshis': testAmount
-        }).to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
+        })
+        .to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
 
       tx.outputs[0]._satoshis = -100;
       tx.outputs[0]._satoshisBN = new BN(-100, 10);
@@ -531,7 +534,8 @@ describe('Transaction', function() {
           'outputIndex': 0,
           'script': testScript,
           'satoshis': testAmount
-        }).to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
+        })
+        .to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
 
       tx.toBuffer = sinon.stub().returns({
         length: 10000000
@@ -550,7 +554,8 @@ describe('Transaction', function() {
           'outputIndex': 0,
           'script': testScript,
           'satoshis': testAmount
-        }).to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
+        })
+        .to('mrU9pEmAx26HcbKVrABvgL7AwA5fjNFoDc', testAmount - 10000);
 
       tx.isCoinbase = sinon.stub().returns(false);
       tx.inputs[0].isNull = sinon.stub().returns(true);
@@ -686,8 +691,10 @@ describe('Transaction', function() {
     });
     it('an output can be removed by index', function() {
       var transaction = new Transaction()
-        .to(toAddress, 40000000)
-        .to(toAddress, 40000000);
+        .to([
+          {address: toAddress, satoshis: 40000000},
+          {address: toAddress, satoshis: 40000000}
+        ])
       transaction.outputs.length.should.equal(2);
       transaction.outputAmount.should.equal(80000000);
       transaction.removeOutput(0);
@@ -839,8 +846,10 @@ describe('Transaction', function() {
     beforeEach(function() {
       transaction = new Transaction()
         .from(simpleUtxoWith1BTC)
-        .to(toAddress, tenth)
-        .to(toAddress, fourth)
+        .to([
+          {address: toAddress, satoshis: tenth},
+          {address: toAddress, satoshis: fourth}
+        ])
         .to(toAddress, half)
         .change(changeAddress);
       out1 = transaction.outputs[0];
@@ -899,8 +908,10 @@ describe('Transaction', function() {
       var tx = new Transaction()
         .from(simpleUtxoWith1BTC)
         .to(toAddress, tenth)
-        .to(toAddress, fourth)
-        .to(toAddress, half)
+        .to([
+          {address: toAddress, satoshis: fourth},
+          {address: toAddress, satoshis: half}
+        ])
         .change(changeAddress);
       tx.clearOutputs();
       tx.outputs.length.should.equal(1);