From c93de907fef8338d5025c2b9235c0939ef89870d Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Wed, 17 Aug 2016 03:21:46 -0700
Subject: [PATCH] merkleblock: add indexOf.

---
 lib/bcoin/merkleblock.js | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/lib/bcoin/merkleblock.js b/lib/bcoin/merkleblock.js
index 85d17624..2370e88b 100644
--- a/lib/bcoin/merkleblock.js
+++ b/lib/bcoin/merkleblock.js
@@ -109,12 +109,29 @@ MerkleBlock.prototype.addTX = function addTX(tx) {
  */
 
 MerkleBlock.prototype.hasTX = function hasTX(hash) {
+  return this.indexOf(hash) !== -1;
+};
+
+/**
+ * Test the block's _matched_ transaction vector against a hash.
+ * @param {Hash|TX} hash
+ * @returns {Number} Index.
+ */
+
+MerkleBlock.prototype.indexOf = function indexOf(hash) {
+  var index;
+
   if (hash instanceof bcoin.tx)
     hash = hash.hash('hex');
 
   this.verifyPartial();
 
-  return this.map[hash] != null;
+  index = this.map[hash];
+
+  if (index == null)
+    return -1;
+
+  return index;
 };
 
 /**