method signature length defined

dist/ethereum.js

@@ -411,6 +411,9 @@ if ("build" !== 'build') {/*
 
 var abi = require('./abi');
 
+// method signature length in bytes
+var ETH_METHOD_SIGNATURE_LENGTH = 4;
+
 var contract = function (address, desc) {
     var inputParser = abi.inputParser(desc);
     var outputParser = abi.outputParser(desc);
@@ -431,7 +434,7 @@ var contract = function (address, desc) {
                     extra = extra || {};
                     extra.to = address;
                     return abi.methodSignature(desc, method.name).then(function (signature) {
-                        extra.data = signature.slice(0, 10) + parsed;
+                        extra.data = signature.slice(0, 2 + ETH_METHOD_SIGNATURE_LENGTH * 2) + parsed;
                         return web3.eth.call(extra).then(onSuccess);
                     });
                 },
@@ -1101,6 +1104,7 @@ function messageHandler(data) {
     }
 }
 
+if (typeof(module) !== "undefined")
     module.exports = web3;
 
 },{}],7:[function(require,module,exports){
@@ -1180,6 +1184,7 @@ Object.defineProperty(WebSocketProvider.prototype, "onmessage", {
     set: function(provider) { this.onMessage(provider); }
 });
 
+if (typeof(module) !== "undefined")
     module.exports = WebSocketProvider;
 
 },{}],"web3":[function(require,module,exports){

lib/contract.js

@@ -27,6 +27,9 @@ if (process.env.NODE_ENV !== 'build') {
 
 var abi = require('./abi');
 
+// method signature length in bytes
+var ETH_METHOD_SIGNATURE_LENGTH = 4;
+
 var contract = function (address, desc) {
     var inputParser = abi.inputParser(desc);
     var outputParser = abi.outputParser(desc);
@@ -47,7 +50,7 @@ var contract = function (address, desc) {
                     extra = extra || {};
                     extra.to = address;
                     return abi.methodSignature(desc, method.name).then(function (signature) {
-                        extra.data = signature.slice(0, 10) + parsed;
+                        extra.data = signature.slice(0, 2 + ETH_METHOD_SIGNATURE_LENGTH * 2) + parsed;
                         return web3.eth.call(extra).then(onSuccess);
                     });
                 },