Transaction.deserialize no longer mutates input

src/transaction.js

@@ -282,6 +282,9 @@ Transaction.deserialize = function(buffer) {
   if (typeof buffer == "string") buffer = new Buffer(buffer, 'hex')
   else if (Array.isArray(buffer)) buffer = new Buffer(buffer)
 
+  // Copy because we mutate (reverse TxOutHashs)
+  buffer = new Buffer(buffer)
+
   var offset = 0
   function readSlice(n) {
     offset += n

test/transaction.js

@@ -38,6 +38,13 @@ describe('Transaction', function() {
       assert.equal(b2h(actual), expected)
     })
 
+    it('does not mutate the input buffer', function() {
+      var buffer = new Buffer(serializedTx, 'hex')
+      Transaction.deserialize(buffer)
+
+      assert.equal(buffer.toString('hex'), serializedTx)
+    })
+
     it('decodes version correctly', function(){
       assert.equal(tx.version, 1)
     })