From 0538c11576a020a0e7fe19652398547fdad4b84b Mon Sep 17 00:00:00 2001
From: Marek Kotewicz <marek.kotewicz@gmail.com>
Date: Fri, 9 Jan 2015 12:55:04 +0100
Subject: sha3 method signature

---
 lib/abi.js | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'lib/abi.js')

diff --git a/lib/abi.js b/lib/abi.js
index 5a4d64515..80cc0d551 100644
--- a/lib/abi.js
+++ b/lib/abi.js
@@ -140,7 +140,6 @@ var toAbiInput = function (json, methodName, params) {
         return;
     }
 
-    bytes = "0x" + padLeft(index.toString(16), 2);
     var method = json[index];
 
     for (var i = 0; i < method.inputs.length; i++) {
@@ -259,7 +258,20 @@ var outputParser = function (json) {
     return parser;
 };
 
+var methodSignature = function (json, name) {
+    var method = json[findMethodIndex(json, name)];
+    var result = name + '(';
+    var inputTypes = method.inputs.map(function (inp) {
+        return inp.type;
+    });
+    result += inputTypes.join(',');
+    result += ')';
+
+    return web3.sha3(result);
+};
+
 module.exports = {
     inputParser: inputParser,
-    outputParser: outputParser
+    outputParser: outputParser,
+    methodSignature: methodSignature
 };
-- 
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