From e2a8b956517737ddc48be4faaef6ae371ac14d29 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Fri, 26 Sep 2014 11:34:55 -0700
Subject: [PATCH] VerifyTransaction

---
 lib/bitcoind.js   |  8 +++++++-
 src/bitcoindjs.cc | 31 ++++++++++++++++++++++++++++++-
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/lib/bitcoind.js b/lib/bitcoind.js
index d1a596a2..c61a32aa 100644
--- a/lib/bitcoind.js
+++ b/lib/bitcoind.js
@@ -324,7 +324,8 @@ function Block(data) {
 }
 
 Block.prototype.verify = function() {
-  return this._verified = this._verified || bitcoindjs.verifyBlock(this.toHex());
+  return this._verified = this._verified
+    || bitcoindjs.verifyBlock(this.toHex());
 };
 
 Block.prototype.toBinary = function() {
@@ -441,6 +442,11 @@ function Transaction(data) {
   this.toHex();
 }
 
+Transaction.prototype.verify = function() {
+  return this._verified = this._verified
+    || bitcoindjs.verifyTransaction(this.toHex());
+};
+
 Transaction.prototype.getSerializeSize = function() {
   ;
 };
diff --git a/src/bitcoindjs.cc b/src/bitcoindjs.cc
index bd08c5a2..c08b9a62 100644
--- a/src/bitcoindjs.cc
+++ b/src/bitcoindjs.cc
@@ -127,6 +127,7 @@ NAN_METHOD(PollBlocks);
 NAN_METHOD(PollMempool);
 NAN_METHOD(BroadcastTx);
 NAN_METHOD(VerifyBlock);
+NAN_METHOD(VerifyTransaction);
 
 static void
 async_start_node_work(uv_work_t *req);
@@ -1102,7 +1103,6 @@ NAN_METHOD(VerifyBlock) {
 
   CBlock block;
   CDataStream ssData(ParseHex(blockHex), SER_NETWORK, PROTOCOL_VERSION);
-  CTransaction tx;
   ssData >> block;
 
   CValidationState state;
@@ -1111,6 +1111,34 @@ NAN_METHOD(VerifyBlock) {
   NanReturnValue(NanNew<Boolean>(valid));
 }
 
+/**
+ * VerifyTransaction
+ */
+
+NAN_METHOD(VerifyTransaction) {
+  NanScope();
+
+  if (args.Length() < 1 || !args[0]->IsString()) {
+    return NanThrowError(
+      "Usage: bitcoindjs.verifyTransaction(txHex)");
+  }
+
+  String::Utf8Value txHex_(args[0]->ToString());
+  std::string txHex = std::string(*txHex_);
+
+  CTransaction tx;
+  CDataStream ssData(ParseHex(txHex), SER_NETWORK, PROTOCOL_VERSION);
+  ssData >> tx;
+
+  CValidationState state;
+  bool valid = CheckTransaction(tx, state);
+
+  string reason;
+  bool standard = IsStandardTx(tx, reason);
+
+  NanReturnValue(NanNew<Boolean>(valid && standard));
+}
+
 /**
  * Conversions
  */
@@ -1343,6 +1371,7 @@ init(Handle<Object> target) {
   NODE_SET_METHOD(target, "pollMempool", PollMempool);
   NODE_SET_METHOD(target, "broadcastTx", BroadcastTx);
   NODE_SET_METHOD(target, "verifyBlock", VerifyBlock);
+  NODE_SET_METHOD(target, "verifyTransaction", VerifyTransaction);
 }
 
 NODE_MODULE(bitcoindjs, init)