diff --git a/dist/ethereum.js b/dist/ethereum.js
index 16656f266..3f601303f 100644
--- a/dist/ethereum.js
+++ b/dist/ethereum.js
@@ -447,18 +447,20 @@ var abi = require('./abi');
  *
  * var myContract = web3.eth.contract('0x0123123121', abi); // creation of contract object
  *
- * myContract.myMethod('this is test string param for call').call(); // myMethod call
- * myContract.myMethod('this is test string param for transact').transact() // myMethod transact
+ * myContract.myMethod('this is test string param for call'); // myMethod call (implicit, default)
+ * myContract.myMethod('this is test string param for call').call(); // myMethod call (explicit)
+ * myContract.transact().myMethod('this is test string param for transact'); // myMethod transact
  *
  * @param address - address of the contract, which should be called
  * @param desc - abi json description of the contract, which is being created
  * @returns contract object
  */
-var contract = function (address, desc) {
+
+var contract = function contract (address, desc) {
     var inputParser = abi.inputParser(desc);
     var outputParser = abi.outputParser(desc);
 
-    var contract = {};
+    var result = {};
 
     desc.forEach(function (method) {
 
@@ -467,44 +469,53 @@ var contract = function (address, desc) {
 
         var impl = function () {
             var params = Array.prototype.slice.call(arguments);
-            var parsed = inputParser[displayName][typeName].apply(null, params);
             var signature = abi.methodSignature(method.name);
+            var parsed = inputParser[displayName][typeName].apply(null, params);
 
-            return {
-                call: function (extra) {
-                    extra = extra || {};
-                    extra.to = address;
-                    extra.data = signature + parsed;
+            var options = contract._options || {};
+            options.to = address;
+            options.data = signature + parsed;
 
-                    var result = web3.eth.call(extra);
-                    return outputParser[displayName][typeName](result);
-                },
-                transact: function (extra) {
-                    extra = extra || {};
-                    extra.to = address;
-                    extra.data = signature + parsed;
+            var output = "";
+            if (contract._isTransact) {
+                // it's used byt natspec.js
+                // TODO: figure out better way to solve this
+                web3._currentContractAbi = desc;
+                web3._currentContractAddress = address;
 
-                    /// it's used by natspec.js
-                    /// TODO: figure a better way to solve this
-                    web3._currentContractAbi = desc;
-                    web3._currentContractAddress = address;
+                output = web3.eth.transact(options);
+            } else {
+                output = web3.eth.call(options);
+            }
 
-                    var result = web3.eth.transact(extra);
-                    return outputParser[displayName][typeName](result);
-                }
-            };
+            return outputParser[displayName][typeName](output);
         };
 
-        if (contract[displayName] === undefined) {
-            contract[displayName] = impl;
+        if (result[displayName] === undefined) {
+            result[displayName] = impl;
         }
 
-        contract[displayName][typeName] = impl;
-    });
+        result[displayName][typeName] = impl;
 
+    });
+    return result;
+};
+
+var transact = function (options) {
+    contract._isTransact = true;
+    contract._options = options;
     return contract;
 };
 
+var call = function (options) {
+    contract._isTransact = false;
+    contract._options = options;
+    return contract;
+};
+
+contract.transact = transact;
+contract.call = call;
+
 module.exports = contract;
 
 
diff --git a/dist/ethereum.js.map b/dist/ethereum.js.map
index c491a0fec..c93c3becf 100644
--- a/dist/ethereum.js.map
+++ b/dist/ethereum.js.map
@@ -12,13 +12,13 @@
     "index.js"
   ],
   "names": [],
-  "mappings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xZA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AClGA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;ACzEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AClEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AC9GA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AChCA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AA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+  "mappings": "AAAA;ACAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;ACxZA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AC7GA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;ACzEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AClEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AC9GA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AChCA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AA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   "file": "generated.js",
   "sourceRoot": "",
   "sourcesContent": [
     "(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})",
     "/*\n    This file is part of ethereum.js.\n\n    ethereum.js is free software: you can redistribute it and/or modify\n    it under the terms of the GNU Lesser General Public License as published by\n    the Free Software Foundation, either version 3 of the License, or\n    (at your option) any later version.\n\n    ethereum.js is distributed in the hope that it will be useful,\n    but WITHOUT ANY WARRANTY; without even the implied warranty of\n    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n    GNU Lesser General Public License for more details.\n\n    You should have received a copy of the GNU Lesser General Public License\n    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.\n*/\n/** @file abi.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n *   Gav Wood <g@ethdev.com>\n * @date 2014\n */\n\n// TODO: is these line is supposed to be here? \nif (\"build\" !== 'build') {/*\n    var BigNumber = require('bignumber.js'); // jshint ignore:line\n*/}\n\nvar web3 = require('./web3'); // jshint ignore:line\n\nBigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });\n\nvar ETH_PADDING = 32;\n\n/// method signature length in bytes\nvar ETH_METHOD_SIGNATURE_LENGTH = 4;\n\n/// Finds first index of array element matching pattern\n/// @param array\n/// @param callback pattern\n/// @returns index of element\nvar findIndex = function (array, callback) {\n    var end = false;\n    var i = 0;\n    for (; i < array.length && !end; i++) {\n        end = callback(array[i]);\n    }\n    return end ? i - 1 : -1;\n};\n\n/// @returns a function that is used as a pattern for 'findIndex'\nvar findMethodIndex = function (json, methodName) {\n    return findIndex(json, function (method) {\n        return method.name === methodName;\n    });\n};\n\n/// @param string string to be padded\n/// @param number of characters that result string should have\n/// @param sign, by default 0\n/// @returns right aligned string\nvar padLeft = function (string, chars, sign) {\n    return new Array(chars - string.length + 1).join(sign ? sign : \"0\") + string;\n};\n\n/// @param expected type prefix (string)\n/// @returns function which checks if type has matching prefix. if yes, returns true, otherwise false\nvar prefixedType = function (prefix) {\n    return function (type) {\n        return type.indexOf(prefix) === 0;\n    };\n};\n\n/// @param expected type name (string)\n/// @returns function which checks if type is matching expected one. if yes, returns true, otherwise false\nvar namedType = function (name) {\n    return function (type) {\n        return name === type;\n    };\n};\n\nvar arrayType = function (type) {\n    return type.slice(-2) === '[]';\n};\n\n/// Formats input value to byte representation of int\n/// If value is negative, return it's two's complement\n/// If the value is floating point, round it down\n/// @returns right-aligned byte representation of int\nvar formatInputInt = function (value) {\n    var padding = ETH_PADDING * 2;\n    if (value instanceof BigNumber || typeof value === 'number') {\n        if (typeof value === 'number')\n            value = new BigNumber(value);\n        value = value.round();\n\n        if (value.lessThan(0)) \n            value = new BigNumber(\"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\", 16).plus(value).plus(1);\n        value = value.toString(16);\n    }\n    else if (value.indexOf('0x') === 0)\n        value = value.substr(2);\n    else if (typeof value === 'string')\n        value = formatInputInt(new BigNumber(value));\n    else\n        value = (+value).toString(16);\n    return padLeft(value, padding);\n};\n\n/// Formats input value to byte representation of string\n/// @returns left-algined byte representation of string\nvar formatInputString = function (value) {\n    return web3.fromAscii(value, ETH_PADDING).substr(2);\n};\n\n/// Formats input value to byte representation of bool\n/// @returns right-aligned byte representation bool\nvar formatInputBool = function (value) {\n    return '000000000000000000000000000000000000000000000000000000000000000' + (value ?  '1' : '0');\n};\n\n/// Formats input value to byte representation of real\n/// Values are multiplied by 2^m and encoded as integers\n/// @returns byte representation of real\nvar formatInputReal = function (value) {\n    return formatInputInt(new BigNumber(value).times(new BigNumber(2).pow(128))); \n};\n\nvar dynamicTypeBytes = function (type, value) {\n    // TODO: decide what to do with array of strings\n    if (arrayType(type) || prefixedType('string')(type))\n        return formatInputInt(value.length); \n    return \"\";\n};\n\n/// Setups input formatters for solidity types\n/// @returns an array of input formatters \nvar setupInputTypes = function () {\n    \n    return [\n        { type: prefixedType('uint'), format: formatInputInt },\n        { type: prefixedType('int'), format: formatInputInt },\n        { type: prefixedType('hash'), format: formatInputInt },\n        { type: prefixedType('string'), format: formatInputString }, \n        { type: prefixedType('real'), format: formatInputReal },\n        { type: prefixedType('ureal'), format: formatInputReal },\n        { type: namedType('address'), format: formatInputInt },\n        { type: namedType('bool'), format: formatInputBool }\n    ];\n};\n\nvar inputTypes = setupInputTypes();\n\n/// Formats input params to bytes\n/// @param contract json abi\n/// @param name of the method that we want to use\n/// @param array of params that will be formatted to bytes\n/// @returns bytes representation of input params\nvar toAbiInput = function (json, methodName, params) {\n    var bytes = \"\";\n    var index = findMethodIndex(json, methodName);\n\n    if (index === -1) {\n        return;\n    }\n\n    var method = json[index];\n    var padding = ETH_PADDING * 2;\n\n    /// first we iterate in search for dynamic \n    method.inputs.forEach(function (input, index) {\n        bytes += dynamicTypeBytes(input.type, params[index]);\n    });\n\n    method.inputs.forEach(function (input, i) {\n        var typeMatch = false;\n        for (var j = 0; j < inputTypes.length && !typeMatch; j++) {\n            typeMatch = inputTypes[j].type(method.inputs[i].type, params[i]);\n        }\n        if (!typeMatch) {\n            console.error('input parser does not support type: ' + method.inputs[i].type);\n        }\n\n        var formatter = inputTypes[j - 1].format;\n        var toAppend = \"\";\n\n        if (arrayType(method.inputs[i].type))\n            toAppend = params[i].reduce(function (acc, curr) {\n                return acc + formatter(curr);\n            }, \"\");\n        else\n            toAppend = formatter(params[i]);\n\n        bytes += toAppend; \n    });\n    return bytes;\n};\n\n/// Check if input value is negative\n/// @param value is hex format\n/// @returns true if it is negative, otherwise false\nvar signedIsNegative = function (value) {\n    return (new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1)) === '1';\n};\n\n/// Formats input right-aligned input bytes to int\n/// @returns right-aligned input bytes formatted to int\nvar formatOutputInt = function (value) {\n    // check if it's negative number\n    // it it is, return two's complement\n    if (signedIsNegative(value)) {\n        return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);\n    }\n    return new BigNumber(value, 16);\n};\n\n/// Formats big right-aligned input bytes to uint\n/// @returns right-aligned input bytes formatted to uint\nvar formatOutputUInt = function (value) {\n    return new BigNumber(value, 16);\n};\n\n/// @returns input bytes formatted to real\nvar formatOutputReal = function (value) {\n    return formatOutputInt(value).dividedBy(new BigNumber(2).pow(128)); \n};\n\n/// @returns input bytes formatted to ureal\nvar formatOutputUReal = function (value) {\n    return formatOutputUInt(value).dividedBy(new BigNumber(2).pow(128)); \n};\n\n/// @returns right-aligned input bytes formatted to hex\nvar formatOutputHash = function (value) {\n    return \"0x\" + value;\n};\n\n/// @returns right-aligned input bytes formatted to bool\nvar formatOutputBool = function (value) {\n    return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;\n};\n\n/// @returns left-aligned input bytes formatted to ascii string\nvar formatOutputString = function (value) {\n    return web3.toAscii(value);\n};\n\n/// @returns right-aligned input bytes formatted to address\nvar formatOutputAddress = function (value) {\n    return \"0x\" + value.slice(value.length - 40, value.length);\n};\n\nvar dynamicBytesLength = function (type) {\n    if (arrayType(type) || prefixedType('string')(type))\n        return ETH_PADDING * 2;\n    return 0;\n};\n\n/// Setups output formaters for solidity types\n/// @returns an array of output formatters\nvar setupOutputTypes = function () {\n\n    return [\n        { type: prefixedType('uint'), format: formatOutputUInt },\n        { type: prefixedType('int'), format: formatOutputInt },\n        { type: prefixedType('hash'), format: formatOutputHash },\n        { type: prefixedType('string'), format: formatOutputString },\n        { type: prefixedType('real'), format: formatOutputReal },\n        { type: prefixedType('ureal'), format: formatOutputUReal },\n        { type: namedType('address'), format: formatOutputAddress },\n        { type: namedType('bool'), format: formatOutputBool }\n    ];\n};\n\nvar outputTypes = setupOutputTypes();\n\n/// Formats output bytes back to param list\n/// @param contract json abi\n/// @param name of the method that we want to use\n/// @param bytes representtion of output \n/// @returns array of output params \nvar fromAbiOutput = function (json, methodName, output) {\n    var index = findMethodIndex(json, methodName);\n\n    if (index === -1) {\n        return;\n    }\n\n    output = output.slice(2);\n\n    var result = [];\n    var method = json[index];\n    var padding = ETH_PADDING * 2;\n\n    var dynamicPartLength = method.outputs.reduce(function (acc, curr) {\n        return acc + dynamicBytesLength(curr.type);\n    }, 0);\n    \n    var dynamicPart = output.slice(0, dynamicPartLength);\n    output = output.slice(dynamicPartLength);\n\n    method.outputs.forEach(function (out, i) {\n        var typeMatch = false;\n        for (var j = 0; j < outputTypes.length && !typeMatch; j++) {\n            typeMatch = outputTypes[j].type(method.outputs[i].type);\n        }\n\n        if (!typeMatch) {\n            console.error('output parser does not support type: ' + method.outputs[i].type);\n        }\n\n        var formatter = outputTypes[j - 1].format;\n        if (arrayType(method.outputs[i].type)) {\n            var size = formatOutputUInt(dynamicPart.slice(0, padding));\n            dynamicPart = dynamicPart.slice(padding);\n            var array = [];\n            for (var k = 0; k < size; k++) {\n                array.push(formatter(output.slice(0, padding))); \n                output = output.slice(padding);\n            }\n            result.push(array);\n        }\n        else if (prefixedType('string')(method.outputs[i].type)) {\n            dynamicPart = dynamicPart.slice(padding); \n            result.push(formatter(output.slice(0, padding)));\n            output = output.slice(padding);\n        } else {\n            result.push(formatter(output.slice(0, padding)));\n            output = output.slice(padding);\n        }\n    });\n\n    return result;\n};\n\n/// @returns display name for method eg. multiply(uint256) -> multiply\nvar methodDisplayName = function (method) {\n    var length = method.indexOf('('); \n    return length !== -1 ? method.substr(0, length) : method;\n};\n\n/// @returns overloaded part of method's name\nvar methodTypeName = function (method) {\n    /// TODO: make it not vulnerable\n    var length = method.indexOf('(');\n    return length !== -1 ? method.substr(length + 1, method.length - 1 - (length + 1)) : \"\";\n};\n\n/// @param json abi for contract\n/// @returns input parser object for given json abi\nvar inputParser = function (json) {\n    var parser = {};\n    json.forEach(function (method) {\n        var displayName = methodDisplayName(method.name); \n        var typeName = methodTypeName(method.name);\n\n        var impl = function () {\n            var params = Array.prototype.slice.call(arguments);\n            return toAbiInput(json, method.name, params);\n        };\n       \n        if (parser[displayName] === undefined) {\n            parser[displayName] = impl;\n        }\n\n        parser[displayName][typeName] = impl;\n    });\n\n    return parser;\n};\n\n/// @param json abi for contract\n/// @returns output parser for given json abi\nvar outputParser = function (json) {\n    var parser = {};\n    json.forEach(function (method) {\n\n        var displayName = methodDisplayName(method.name); \n        var typeName = methodTypeName(method.name);\n\n        var impl = function (output) {\n            return fromAbiOutput(json, method.name, output);\n        };\n\n        if (parser[displayName] === undefined) {\n            parser[displayName] = impl;\n        }\n\n        parser[displayName][typeName] = impl;\n    });\n\n    return parser;\n};\n\n/// @param method name for which we want to get method signature\n/// @returns (promise) contract method signature for method with given name\nvar methodSignature = function (name) {\n    return web3.sha3(web3.fromAscii(name)).slice(0, 2 + ETH_METHOD_SIGNATURE_LENGTH * 2);\n};\n\nmodule.exports = {\n    inputParser: inputParser,\n    outputParser: outputParser,\n    methodSignature: methodSignature,\n    methodDisplayName: methodDisplayName,\n    methodTypeName: methodTypeName\n};\n\n",
-    "/*\n    This file is part of ethereum.js.\n\n    ethereum.js is free software: you can redistribute it and/or modify\n    it under the terms of the GNU Lesser General Public License as published by\n    the Free Software Foundation, either version 3 of the License, or\n    (at your option) any later version.\n\n    ethereum.js is distributed in the hope that it will be useful,\n    but WITHOUT ANY WARRANTY; without even the implied warranty of\n    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n    GNU Lesser General Public License for more details.\n\n    You should have received a copy of the GNU Lesser General Public License\n    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.\n*/\n/** @file contract.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n * @date 2014\n */\n\nvar web3 = require('./web3'); // jshint ignore:line\nvar abi = require('./abi');\n\n/**\n * This method should be called when we want to call / transact some solidity method from javascript\n * it returns an object which has same methods available as solidity contract description\n * usage example: \n *\n * var abi = [{\n *      name: 'myMethod',\n *      inputs: [{ name: 'a', type: 'string' }],\n *      outputs: [{name: 'd', type: 'string' }]\n * }];  // contract abi\n *\n * var myContract = web3.eth.contract('0x0123123121', abi); // creation of contract object\n *\n * myContract.myMethod('this is test string param for call').call(); // myMethod call\n * myContract.myMethod('this is test string param for transact').transact() // myMethod transact\n *\n * @param address - address of the contract, which should be called\n * @param desc - abi json description of the contract, which is being created\n * @returns contract object\n */\nvar contract = function (address, desc) {\n    var inputParser = abi.inputParser(desc);\n    var outputParser = abi.outputParser(desc);\n\n    var contract = {};\n\n    desc.forEach(function (method) {\n\n        var displayName = abi.methodDisplayName(method.name);\n        var typeName = abi.methodTypeName(method.name);\n\n        var impl = function () {\n            var params = Array.prototype.slice.call(arguments);\n            var parsed = inputParser[displayName][typeName].apply(null, params);\n            var signature = abi.methodSignature(method.name);\n\n            return {\n                call: function (extra) {\n                    extra = extra || {};\n                    extra.to = address;\n                    extra.data = signature + parsed;\n\n                    var result = web3.eth.call(extra);\n                    return outputParser[displayName][typeName](result);\n                },\n                transact: function (extra) {\n                    extra = extra || {};\n                    extra.to = address;\n                    extra.data = signature + parsed;\n\n                    /// it's used by natspec.js\n                    /// TODO: figure a better way to solve this\n                    web3._currentContractAbi = desc;\n                    web3._currentContractAddress = address;\n\n                    var result = web3.eth.transact(extra);\n                    return outputParser[displayName][typeName](result);\n                }\n            };\n        };\n\n        if (contract[displayName] === undefined) {\n            contract[displayName] = impl;\n        }\n\n        contract[displayName][typeName] = impl;\n    });\n\n    return contract;\n};\n\nmodule.exports = contract;\n\n",
+    "/*\n    This file is part of ethereum.js.\n\n    ethereum.js is free software: you can redistribute it and/or modify\n    it under the terms of the GNU Lesser General Public License as published by\n    the Free Software Foundation, either version 3 of the License, or\n    (at your option) any later version.\n\n    ethereum.js is distributed in the hope that it will be useful,\n    but WITHOUT ANY WARRANTY; without even the implied warranty of\n    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n    GNU Lesser General Public License for more details.\n\n    You should have received a copy of the GNU Lesser General Public License\n    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.\n*/\n/** @file contract.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n * @date 2014\n */\n\nvar web3 = require('./web3'); // jshint ignore:line\nvar abi = require('./abi');\n\n/**\n * This method should be called when we want to call / transact some solidity method from javascript\n * it returns an object which has same methods available as solidity contract description\n * usage example: \n *\n * var abi = [{\n *      name: 'myMethod',\n *      inputs: [{ name: 'a', type: 'string' }],\n *      outputs: [{name: 'd', type: 'string' }]\n * }];  // contract abi\n *\n * var myContract = web3.eth.contract('0x0123123121', abi); // creation of contract object\n *\n * myContract.myMethod('this is test string param for call'); // myMethod call (implicit, default)\n * myContract.myMethod('this is test string param for call').call(); // myMethod call (explicit)\n * myContract.transact().myMethod('this is test string param for transact'); // myMethod transact\n *\n * @param address - address of the contract, which should be called\n * @param desc - abi json description of the contract, which is being created\n * @returns contract object\n */\n\nvar contract = function contract (address, desc) {\n    var inputParser = abi.inputParser(desc);\n    var outputParser = abi.outputParser(desc);\n\n    var result = {};\n\n    desc.forEach(function (method) {\n\n        var displayName = abi.methodDisplayName(method.name);\n        var typeName = abi.methodTypeName(method.name);\n\n        var impl = function () {\n            var params = Array.prototype.slice.call(arguments);\n            var signature = abi.methodSignature(method.name);\n            var parsed = inputParser[displayName][typeName].apply(null, params);\n\n            var options = contract._options || {};\n            options.to = address;\n            options.data = signature + parsed;\n\n            var output = \"\";\n            if (contract._isTransact) {\n                // it's used byt natspec.js\n                // TODO: figure out better way to solve this\n                web3._currentContractAbi = desc;\n                web3._currentContractAddress = address;\n\n                output = web3.eth.transact(options);\n            } else {\n                output = web3.eth.call(options);\n            }\n\n            return outputParser[displayName][typeName](output);\n        };\n\n        if (result[displayName] === undefined) {\n            result[displayName] = impl;\n        }\n\n        result[displayName][typeName] = impl;\n\n    });\n    return result;\n};\n\nvar transact = function (options) {\n    contract._isTransact = true;\n    contract._options = options;\n    return contract;\n};\n\nvar call = function (options) {\n    contract._isTransact = false;\n    contract._options = options;\n    return contract;\n};\n\ncontract.transact = transact;\ncontract.call = call;\n\nmodule.exports = contract;\n\n",
     "/*\n    This file is part of ethereum.js.\n\n    ethereum.js is free software: you can redistribute it and/or modify\n    it under the terms of the GNU Lesser General Public License as published by\n    the Free Software Foundation, either version 3 of the License, or\n    (at your option) any later version.\n\n    ethereum.js is distributed in the hope that it will be useful,\n    but WITHOUT ANY WARRANTY; without even the implied warranty of\n    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n    GNU Lesser General Public License for more details.\n\n    You should have received a copy of the GNU Lesser General Public License\n    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.\n*/\n/** @file filter.js\n * @authors:\n *   Jeffrey Wilcke <jeff@ethdev.com>\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n *   Gav Wood <g@ethdev.com>\n * @date 2014\n */\n\nvar web3 = require('./web3'); // jshint ignore:line\n\n/// should be used when we want to watch something\n/// it's using inner polling mechanism and is notified about changes\nvar Filter = function(options, impl) {\n    this.impl = impl;\n    this.callbacks = [];\n\n    this.id = impl.newFilter(options);\n    web3.on(impl.changed, this.id, this.trigger.bind(this));\n    web3.provider.startPolling({call: impl.changed, args: [this.id]}, this.id);\n};\n\n/// alias for changed*\nFilter.prototype.arrived = function(callback) {\n    this.changed(callback);\n};\n\n/// gets called when there is new eth/shh message\nFilter.prototype.changed = function(callback) {\n    this.callbacks.push(callback);\n};\n\n/// trigger calling new message from people\nFilter.prototype.trigger = function(messages) {\n    for(var i = 0; i < this.callbacks.length; i++) {\n        this.callbacks[i].call(this, messages);\n    }\n};\n\n/// should be called to uninstall current filter\nFilter.prototype.uninstall = function() {\n    this.impl.uninstallFilter(this.id);\n    web3.provider.stopPolling(this.id);\n    web3.off(impl.changed, this.id);\n};\n\n/// should be called to manually trigger getting latest messages from the client\nFilter.prototype.messages = function() {\n    return this.impl.getMessages(this.id);\n};\n\n/// alias for messages\nFilter.prototype.logs = function () {\n    return this.messages();\n};\n\nmodule.exports = Filter;\n",
     "/*\n    This file is part of ethereum.js.\n\n    ethereum.js is free software: you can redistribute it and/or modify\n    it under the terms of the GNU Lesser General Public License as published by\n    the Free Software Foundation, either version 3 of the License, or\n    (at your option) any later version.\n\n    ethereum.js is distributed in the hope that it will be useful,\n    but WITHOUT ANY WARRANTY; without even the implied warranty of\n    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n    GNU Lesser General Public License for more details.\n\n    You should have received a copy of the GNU Lesser General Public License\n    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.\n*/\n/** @file httpsync.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\nvar HttpSyncProvider = function (host) {\n    this.handlers = [];\n    this.host = host || 'http://localhost:8080';\n};\n\n/// Transforms inner message to proper jsonrpc object\n/// @param inner message object\n/// @returns jsonrpc object\nfunction formatJsonRpcObject(object) {\n    return {\n        jsonrpc: '2.0',\n        method: object.call,\n        params: object.args,\n        id: object._id\n    };\n}\n\n/// Transforms jsonrpc object to inner message\n/// @param incoming jsonrpc message \n/// @returns inner message object\nfunction formatJsonRpcMessage(message) {\n    var object = JSON.parse(message);\n\n    return {\n        _id: object.id,\n        data: object.result,\n        error: object.error\n    };\n}\n\nHttpSyncProvider.prototype.send = function (payload) {\n    var data = formatJsonRpcObject(payload);\n    \n    var request = new XMLHttpRequest();\n    request.open('POST', this.host, false);\n    request.send(JSON.stringify(data));\n    \n    // check request.status\n    return request.responseText;\n};\n\nmodule.exports = HttpSyncProvider;\n\n",
     "/*\n    This file is part of ethereum.js.\n\n    ethereum.js is free software: you can redistribute it and/or modify\n    it under the terms of the GNU Lesser General Public License as published by\n    the Free Software Foundation, either version 3 of the License, or\n    (at your option) any later version.\n\n    ethereum.js is distributed in the hope that it will be useful,\n    but WITHOUT ANY WARRANTY; without even the implied warranty of\n    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n    GNU Lesser General Public License for more details.\n\n    You should have received a copy of the GNU Lesser General Public License\n    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.\n*/\n/** @file providermanager.js\n * @authors:\n *   Jeffrey Wilcke <jeff@ethdev.com>\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n *   Gav Wood <g@ethdev.com>\n * @date 2014\n */\n\nvar web3 = require('./web3'); // jshint ignore:line\n\n/**\n * Provider manager object prototype\n * It's responsible for passing messages to providers\n * If no provider is set it's responsible for queuing requests\n * It's also responsible for polling the ethereum node for incoming messages\n * Default poll timeout is 12 seconds\n * If we are running ethereum.js inside ethereum browser, there are backend based tools responsible for polling,\n * and provider manager polling mechanism is not used\n */\nvar ProviderManager = function() {\n    this.queued = [];\n    this.polls = [];\n    this.ready = false;\n    this.provider = undefined;\n    this.id = 1;\n\n    var self = this;\n    var poll = function () {\n        if (self.provider && self.provider.poll) {\n            self.polls.forEach(function (data) {\n                data.data._id = self.id;\n                self.id++;\n                self.provider.poll(data.data, data.id);\n            });\n        }\n        setTimeout(poll, 12000);\n    };\n    poll();\n};\n\n/// sends outgoing requests, if provider is not available, enqueue the request\nProviderManager.prototype.send = function(data) {\n\n    data.args = data.args || [];\n    data._id = this.id++;\n\n    if (this.provider === undefined) {\n        console.error('provider is not set');\n        return undefined;\n    }\n\n    //TODO: handle error here? \n    var result = this.provider.send(data);\n    result = JSON.parse(result);\n    return result.result;\n};\n\n/// setups provider, which will be used for sending messages\nProviderManager.prototype.set = function(provider) {\n    if(this.provider !== undefined && this.provider.unload !== undefined) {\n        this.provider.unload();\n    }\n\n    this.provider = provider;\n    this.ready = true;\n};\n\n/// @returns true if the provider i properly set\nProviderManager.prototype.installed = function() {\n    return this.provider !== undefined;\n};\n\n/// this method is only used, when we do not have native qt bindings and have to do polling on our own\n/// should be callled, on start watching for eth/shh changes\nProviderManager.prototype.startPolling = function (data, pollId) {\n    if (!this.provider || !this.provider.poll) {\n        return;\n    }\n    this.polls.push({data: data, id: pollId});\n};\n\n/// should be called to stop polling for certain watch changes\nProviderManager.prototype.stopPolling = function (pollId) {\n    for (var i = this.polls.length; i--;) {\n        var poll = this.polls[i];\n        if (poll.id === pollId) {\n            this.polls.splice(i, 1);\n        }\n    }\n};\n\nmodule.exports = ProviderManager;\n\n",
diff --git a/dist/ethereum.min.js b/dist/ethereum.min.js
index 17e958d35..b82cc545b 100644
--- a/dist/ethereum.min.js
+++ b/dist/ethereum.min.js
@@ -1 +1 @@
-require=function t(e,r,n){function i(a,f){if(!r[a]){if(!e[a]){var u="function"==typeof require&&require;if(!f&&u)return u(a,!0);if(o)return o(a,!0);var s=new Error("Cannot find module '"+a+"'");throw s.code="MODULE_NOT_FOUND",s}var c=r[a]={exports:{}};e[a][0].call(c.exports,function(t){var r=e[a][1][t];return i(r?r:t)},c,c.exports,t,e,r,n)}return r[a].exports}for(var o="function"==typeof require&&require,a=0;a<n.length;a++)i(n[a]);return i}({1:[function(t,e){var r=t("./web3");BigNumber.config({ROUNDING_MODE:BigNumber.ROUND_DOWN});var n=32,i=4,o=function(t,e){for(var r=!1,n=0;n<t.length&&!r;n++)r=e(t[n]);return r?n-1:-1},a=function(t,e){return o(t,function(t){return t.name===e})},f=function(t,e,r){return new Array(e-t.length+1).join(r?r:"0")+t},u=function(t){return function(e){return 0===e.indexOf(t)}},s=function(t){return function(e){return t===e}},c=function(t){return"[]"===t.slice(-2)},l=function(t){var e=2*n;return t instanceof BigNumber||"number"==typeof t?("number"==typeof t&&(t=new BigNumber(t)),t=t.round(),t.lessThan(0)&&(t=new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16).plus(t).plus(1)),t=t.toString(16)):t=0===t.indexOf("0x")?t.substr(2):"string"==typeof t?l(new BigNumber(t)):(+t).toString(16),f(t,e)},p=function(t){return r.fromAscii(t,n).substr(2)},h=function(t){return"000000000000000000000000000000000000000000000000000000000000000"+(t?"1":"0")},d=function(t){return l(new BigNumber(t).times(new BigNumber(2).pow(128)))},g=function(t,e){return c(t)||u("string")(t)?l(e.length):""},m=function(){return[{type:u("uint"),format:l},{type:u("int"),format:l},{type:u("hash"),format:l},{type:u("string"),format:p},{type:u("real"),format:d},{type:u("ureal"),format:d},{type:s("address"),format:l},{type:s("bool"),format:h}]},v=m(),b=function(t,e,r){var n="",i=a(t,e);if(-1!==i){var o=t[i];return o.inputs.forEach(function(t,e){n+=g(t.type,r[e])}),o.inputs.forEach(function(t,e){for(var i=!1,a=0;a<v.length&&!i;a++)i=v[a].type(o.inputs[e].type,r[e]);i||console.error("input parser does not support type: "+o.inputs[e].type);var f=v[a-1].format,u="";u=c(o.inputs[e].type)?r[e].reduce(function(t,e){return t+f(e)},""):f(r[e]),n+=u}),n}},y=function(t){return"1"===new BigNumber(t.substr(0,1),16).toString(2).substr(0,1)},_=function(t){return y(t)?new BigNumber(t,16).minus(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16)).minus(1):new BigNumber(t,16)},w=function(t){return new BigNumber(t,16)},N=function(t){return _(t).dividedBy(new BigNumber(2).pow(128))},x=function(t){return w(t).dividedBy(new BigNumber(2).pow(128))},B=function(t){return"0x"+t},A=function(t){return"0000000000000000000000000000000000000000000000000000000000000001"===t?!0:!1},S=function(t){return r.toAscii(t)},O=function(t){return"0x"+t.slice(t.length-40,t.length)},P=function(t){return c(t)||u("string")(t)?2*n:0},E=function(){return[{type:u("uint"),format:w},{type:u("int"),format:_},{type:u("hash"),format:B},{type:u("string"),format:S},{type:u("real"),format:N},{type:u("ureal"),format:x},{type:s("address"),format:O},{type:s("bool"),format:A}]},F=E(),k=function(t,e,r){var i=a(t,e);if(-1!==i){r=r.slice(2);var o=[],f=t[i],s=2*n,l=f.outputs.reduce(function(t,e){return t+P(e.type)},0),p=r.slice(0,l);return r=r.slice(l),f.outputs.forEach(function(t,e){for(var n=!1,i=0;i<F.length&&!n;i++)n=F[i].type(f.outputs[e].type);n||console.error("output parser does not support type: "+f.outputs[e].type);var a=F[i-1].format;if(c(f.outputs[e].type)){var l=w(p.slice(0,s));p=p.slice(s);for(var h=[],d=0;l>d;d++)h.push(a(r.slice(0,s))),r=r.slice(s);o.push(h)}else u("string")(f.outputs[e].type)?(p=p.slice(s),o.push(a(r.slice(0,s))),r=r.slice(s)):(o.push(a(r.slice(0,s))),r=r.slice(s))}),o}},D=function(t){var e=t.indexOf("(");return-1!==e?t.substr(0,e):t},M=function(t){var e=t.indexOf("(");return-1!==e?t.substr(e+1,t.length-1-(e+1)):""},q=function(t){var e={};return t.forEach(function(r){var n=D(r.name),i=M(r.name),o=function(){var e=Array.prototype.slice.call(arguments);return b(t,r.name,e)};void 0===e[n]&&(e[n]=o),e[n][i]=o}),e},T=function(t){var e={};return t.forEach(function(r){var n=D(r.name),i=M(r.name),o=function(e){return k(t,r.name,e)};void 0===e[n]&&(e[n]=o),e[n][i]=o}),e},C=function(t){return r.sha3(r.fromAscii(t)).slice(0,2+2*i)};e.exports={inputParser:q,outputParser:T,methodSignature:C,methodDisplayName:D,methodTypeName:M}},{"./web3":7}],2:[function(t,e){var r=t("./web3"),n=t("./abi"),i=function(t,e){var i=n.inputParser(e),o=n.outputParser(e),a={};return e.forEach(function(f){var u=n.methodDisplayName(f.name),s=n.methodTypeName(f.name),c=function(){var a=Array.prototype.slice.call(arguments),c=i[u][s].apply(null,a),l=n.methodSignature(f.name);return{call:function(e){e=e||{},e.to=t,e.data=l+c;var n=r.eth.call(e);return o[u][s](n)},transact:function(n){n=n||{},n.to=t,n.data=l+c,r._currentContractAbi=e,r._currentContractAddress=t;var i=r.eth.transact(n);return o[u][s](i)}}};void 0===a[u]&&(a[u]=c),a[u][s]=c}),a};e.exports=i},{"./abi":1,"./web3":7}],3:[function(t,e){var r=t("./web3"),n=function(t,e){this.impl=e,this.callbacks=[],this.id=e.newFilter(t),r.on(e.changed,this.id,this.trigger.bind(this)),r.provider.startPolling({call:e.changed,args:[this.id]},this.id)};n.prototype.arrived=function(t){this.changed(t)},n.prototype.changed=function(t){this.callbacks.push(t)},n.prototype.trigger=function(t){for(var e=0;e<this.callbacks.length;e++)this.callbacks[e].call(this,t)},n.prototype.uninstall=function(){this.impl.uninstallFilter(this.id),r.provider.stopPolling(this.id),r.off(impl.changed,this.id)},n.prototype.messages=function(){return this.impl.getMessages(this.id)},n.prototype.logs=function(){return this.messages()},e.exports=n},{"./web3":7}],4:[function(t,e){function r(t){return{jsonrpc:"2.0",method:t.call,params:t.args,id:t._id}}var n=function(t){this.handlers=[],this.host=t||"http://localhost:8080"};n.prototype.send=function(t){var e=r(t),n=new XMLHttpRequest;return n.open("POST",this.host,!1),n.send(JSON.stringify(e)),n.responseText},e.exports=n},{}],5:[function(t,e){var r=(t("./web3"),function(){this.queued=[],this.polls=[],this.ready=!1,this.provider=void 0,this.id=1;var t=this,e=function(){t.provider&&t.provider.poll&&t.polls.forEach(function(e){e.data._id=t.id,t.id++,t.provider.poll(e.data,e.id)}),setTimeout(e,12e3)};e()});r.prototype.send=function(t){if(t.args=t.args||[],t._id=this.id++,void 0===this.provider)return void console.error("provider is not set");var e=this.provider.send(t);return e=JSON.parse(e),e.result},r.prototype.set=function(t){void 0!==this.provider&&void 0!==this.provider.unload&&this.provider.unload(),this.provider=t,this.ready=!0},r.prototype.installed=function(){return void 0!==this.provider},r.prototype.startPolling=function(t,e){this.provider&&this.provider.poll&&this.polls.push({data:t,id:e})},r.prototype.stopPolling=function(t){for(var e=this.polls.length;e--;){var r=this.polls[e];r.id===t&&this.polls.splice(e,1)}},e.exports=r},{"./web3":7}],6:[function(t,e){var r=function(){};r.prototype.send=function(t){return navigator.qt.callMethod(JSON.stringify(t))},e.exports=r},{}],7:[function(t,e){var r=["wei","Kwei","Mwei","Gwei","szabo","finney","ether","grand","Mether","Gether","Tether","Pether","Eether","Zether","Yether","Nether","Dether","Vether","Uether"],n=function(){return[{name:"sha3",call:"web3_sha3"}]},i=function(){var t=function(t){return"string"==typeof t[0]?"eth_blockByHash":"eth_blockByNumber"},e=function(t){return"string"==typeof t[0]?"eth_transactionByHash":"eth_transactionByNumber"},r=function(t){return"string"==typeof t[0]?"eth_uncleByHash":"eth_uncleByNumber"},n=[{name:"balanceAt",call:"eth_balanceAt"},{name:"stateAt",call:"eth_stateAt"},{name:"storageAt",call:"eth_storageAt"},{name:"countAt",call:"eth_countAt"},{name:"codeAt",call:"eth_codeAt"},{name:"transact",call:"eth_transact"},{name:"call",call:"eth_call"},{name:"block",call:t},{name:"transaction",call:e},{name:"uncle",call:r},{name:"compilers",call:"eth_compilers"},{name:"lll",call:"eth_lll"},{name:"solidity",call:"eth_solidity"},{name:"serpent",call:"eth_serpent"},{name:"logs",call:"eth_logs"}];return n},o=function(){return[{name:"coinbase",getter:"eth_coinbase",setter:"eth_setCoinbase"},{name:"listening",getter:"eth_listening",setter:"eth_setListening"},{name:"mining",getter:"eth_mining",setter:"eth_setMining"},{name:"gasPrice",getter:"eth_gasPrice"},{name:"account",getter:"eth_account"},{name:"accounts",getter:"eth_accounts"},{name:"peerCount",getter:"eth_peerCount"},{name:"defaultBlock",getter:"eth_defaultBlock",setter:"eth_setDefaultBlock"},{name:"number",getter:"eth_number"}]},a=function(){return[{name:"put",call:"db_put"},{name:"get",call:"db_get"},{name:"putString",call:"db_putString"},{name:"getString",call:"db_getString"}]},f=function(){return[{name:"post",call:"shh_post"},{name:"newIdentity",call:"shh_newIdentity"},{name:"haveIdentity",call:"shh_haveIdentity"},{name:"newGroup",call:"shh_newGroup"},{name:"addToGroup",call:"shh_addToGroup"}]},u=function(){var t=function(t){return"string"==typeof t[0]?"eth_newFilterString":"eth_newFilter"};return[{name:"newFilter",call:t},{name:"uninstallFilter",call:"eth_uninstallFilter"},{name:"getMessages",call:"eth_filterLogs"}]},s=function(){return[{name:"newFilter",call:"shh_newFilter"},{name:"uninstallFilter",call:"shh_uninstallFilter"},{name:"getMessage",call:"shh_getMessages"}]},c=function(t,e){e.forEach(function(e){t[e.name]=function(){var t=Array.prototype.slice.call(arguments),r="function"==typeof e.call?e.call(t):e.call;return p.provider.send({call:r,args:t})}})},l=function(t,e){e.forEach(function(e){var r={};r.get=function(){return p.provider.send({call:e.getter})},e.setter&&(r.set=function(t){return p.provider.send({call:e.setter,args:[t]})}),Object.defineProperty(t,e.name,r)})},p={_callbacks:{},_events:{},providers:{},toHex:function(t){for(var e="",r=0;r<t.length;r++){var n=t.charCodeAt(r).toString(16);e+=n.length<2?"0"+n:n}return e},toAscii:function(t){var e="",r=0,n=t.length;for("0x"===t.substring(0,2)&&(r=2);n>r;r+=2){var i=parseInt(t.substr(r,2),16);if(0===i)break;e+=String.fromCharCode(i)}return e},fromAscii:function(t,e){e=void 0===e?0:e;for(var r=this.toHex(t);r.length<2*e;)r+="00";return"0x"+r},toDecimal:function(t){return new BigNumber(t.substring(2),16).toString(10)},fromDecimal:function(t){return"0x"+new BigNumber(t).toString(16)},toEth:function(t){for(var e="string"==typeof t?0===t.indexOf("0x")?parseInt(t.substr(2),16):parseInt(t):t,n=0,i=r;e>3e3&&n<i.length-1;)e/=1e3,n++;for(var o=e.toString().length<e.toFixed(2).length?e.toString():e.toFixed(2),a=function(t,e,r){return e+","+r};;){var f=o;if(o=o.replace(/(\d)(\d\d\d[\.\,])/,a),f===o)break}return o+" "+i[n]},eth:{watch:function(t){return new p.filter(t,h)}},db:{},shh:{watch:function(t){return new p.filter(t,d)}},haveProvider:function(){return!!p.provider.provider}};c(p,n()),c(p.eth,i()),l(p.eth,o()),c(p.db,a()),c(p.shh,f());var h={changed:"eth_changed"};c(h,u());var d={changed:"shh_changed"};c(d,s()),p.setProvider=function(t){p.provider.set(t)},e.exports=p},{}],web3:[function(t,e){var r=t("./lib/web3"),n=t("./lib/providermanager");r.provider=new n,r.filter=t("./lib/filter"),r.providers.HttpSyncProvider=t("./lib/httpsync"),r.providers.QtSyncProvider=t("./lib/qtsync"),r.eth.contract=t("./lib/contract"),r.abi=t("./lib/abi"),e.exports=r},{"./lib/abi":1,"./lib/contract":2,"./lib/filter":3,"./lib/httpsync":4,"./lib/providermanager":5,"./lib/qtsync":6,"./lib/web3":7}]},{},["web3"]);
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+require=function t(e,n,r){function i(a,f){if(!n[a]){if(!e[a]){var s="function"==typeof require&&require;if(!f&&s)return s(a,!0);if(o)return o(a,!0);var u=new Error("Cannot find module '"+a+"'");throw u.code="MODULE_NOT_FOUND",u}var c=n[a]={exports:{}};e[a][0].call(c.exports,function(t){var n=e[a][1][t];return i(n?n:t)},c,c.exports,t,e,n,r)}return n[a].exports}for(var o="function"==typeof require&&require,a=0;a<r.length;a++)i(r[a]);return i}({1:[function(t,e){var n=t("./web3");BigNumber.config({ROUNDING_MODE:BigNumber.ROUND_DOWN});var r=32,i=4,o=function(t,e){for(var n=!1,r=0;r<t.length&&!n;r++)n=e(t[r]);return n?r-1:-1},a=function(t,e){return o(t,function(t){return t.name===e})},f=function(t,e,n){return new Array(e-t.length+1).join(n?n:"0")+t},s=function(t){return function(e){return 0===e.indexOf(t)}},u=function(t){return function(e){return t===e}},c=function(t){return"[]"===t.slice(-2)},l=function(t){var e=2*r;return t instanceof BigNumber||"number"==typeof t?("number"==typeof t&&(t=new BigNumber(t)),t=t.round(),t.lessThan(0)&&(t=new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16).plus(t).plus(1)),t=t.toString(16)):t=0===t.indexOf("0x")?t.substr(2):"string"==typeof t?l(new BigNumber(t)):(+t).toString(16),f(t,e)},p=function(t){return n.fromAscii(t,r).substr(2)},h=function(t){return"000000000000000000000000000000000000000000000000000000000000000"+(t?"1":"0")},d=function(t){return l(new BigNumber(t).times(new BigNumber(2).pow(128)))},g=function(t,e){return c(t)||s("string")(t)?l(e.length):""},m=function(){return[{type:s("uint"),format:l},{type:s("int"),format:l},{type:s("hash"),format:l},{type:s("string"),format:p},{type:s("real"),format:d},{type:s("ureal"),format:d},{type:u("address"),format:l},{type:u("bool"),format:h}]},v=m(),b=function(t,e,n){var r="",i=a(t,e);if(-1!==i){var o=t[i];return o.inputs.forEach(function(t,e){r+=g(t.type,n[e])}),o.inputs.forEach(function(t,e){for(var i=!1,a=0;a<v.length&&!i;a++)i=v[a].type(o.inputs[e].type,n[e]);i||console.error("input parser does not support type: "+o.inputs[e].type);var f=v[a-1].format,s="";s=c(o.inputs[e].type)?n[e].reduce(function(t,e){return t+f(e)},""):f(n[e]),r+=s}),r}},y=function(t){return"1"===new BigNumber(t.substr(0,1),16).toString(2).substr(0,1)},_=function(t){return y(t)?new BigNumber(t,16).minus(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16)).minus(1):new BigNumber(t,16)},w=function(t){return new BigNumber(t,16)},N=function(t){return _(t).dividedBy(new BigNumber(2).pow(128))},x=function(t){return w(t).dividedBy(new BigNumber(2).pow(128))},B=function(t){return"0x"+t},A=function(t){return"0000000000000000000000000000000000000000000000000000000000000001"===t?!0:!1},S=function(t){return n.toAscii(t)},O=function(t){return"0x"+t.slice(t.length-40,t.length)},P=function(t){return c(t)||s("string")(t)?2*r:0},E=function(){return[{type:s("uint"),format:w},{type:s("int"),format:_},{type:s("hash"),format:B},{type:s("string"),format:S},{type:s("real"),format:N},{type:s("ureal"),format:x},{type:u("address"),format:O},{type:u("bool"),format:A}]},F=E(),k=function(t,e,n){var i=a(t,e);if(-1!==i){n=n.slice(2);var o=[],f=t[i],u=2*r,l=f.outputs.reduce(function(t,e){return t+P(e.type)},0),p=n.slice(0,l);return n=n.slice(l),f.outputs.forEach(function(t,e){for(var r=!1,i=0;i<F.length&&!r;i++)r=F[i].type(f.outputs[e].type);r||console.error("output parser does not support type: "+f.outputs[e].type);var a=F[i-1].format;if(c(f.outputs[e].type)){var l=w(p.slice(0,u));p=p.slice(u);for(var h=[],d=0;l>d;d++)h.push(a(n.slice(0,u))),n=n.slice(u);o.push(h)}else s("string")(f.outputs[e].type)?(p=p.slice(u),o.push(a(n.slice(0,u))),n=n.slice(u)):(o.push(a(n.slice(0,u))),n=n.slice(u))}),o}},T=function(t){var e=t.indexOf("(");return-1!==e?t.substr(0,e):t},D=function(t){var e=t.indexOf("(");return-1!==e?t.substr(e+1,t.length-1-(e+1)):""},M=function(t){var e={};return t.forEach(function(n){var r=T(n.name),i=D(n.name),o=function(){var e=Array.prototype.slice.call(arguments);return b(t,n.name,e)};void 0===e[r]&&(e[r]=o),e[r][i]=o}),e},q=function(t){var e={};return t.forEach(function(n){var r=T(n.name),i=D(n.name),o=function(e){return k(t,n.name,e)};void 0===e[r]&&(e[r]=o),e[r][i]=o}),e},C=function(t){return n.sha3(n.fromAscii(t)).slice(0,2+2*i)};e.exports={inputParser:M,outputParser:q,methodSignature:C,methodDisplayName:T,methodTypeName:D}},{"./web3":7}],2:[function(t,e){var n=t("./web3"),r=t("./abi"),i=function f(t,e){var i=r.inputParser(e),o=r.outputParser(e),a={};return e.forEach(function(s){var u=r.methodDisplayName(s.name),c=r.methodTypeName(s.name),l=function(){var a=Array.prototype.slice.call(arguments),l=r.methodSignature(s.name),p=i[u][c].apply(null,a),h=f._options||{};h.to=t,h.data=l+p;var d="";return f._isTransact?(n._currentContractAbi=e,n._currentContractAddress=t,d=n.eth.transact(h)):d=n.eth.call(h),o[u][c](d)};void 0===a[u]&&(a[u]=l),a[u][c]=l}),a},o=function(t){return i._isTransact=!0,i._options=t,i},a=function(t){return i._isTransact=!1,i._options=t,i};i.transact=o,i.call=a,e.exports=i},{"./abi":1,"./web3":7}],3:[function(t,e){var n=t("./web3"),r=function(t,e){this.impl=e,this.callbacks=[],this.id=e.newFilter(t),n.on(e.changed,this.id,this.trigger.bind(this)),n.provider.startPolling({call:e.changed,args:[this.id]},this.id)};r.prototype.arrived=function(t){this.changed(t)},r.prototype.changed=function(t){this.callbacks.push(t)},r.prototype.trigger=function(t){for(var e=0;e<this.callbacks.length;e++)this.callbacks[e].call(this,t)},r.prototype.uninstall=function(){this.impl.uninstallFilter(this.id),n.provider.stopPolling(this.id),n.off(impl.changed,this.id)},r.prototype.messages=function(){return this.impl.getMessages(this.id)},r.prototype.logs=function(){return this.messages()},e.exports=r},{"./web3":7}],4:[function(t,e){function n(t){return{jsonrpc:"2.0",method:t.call,params:t.args,id:t._id}}var r=function(t){this.handlers=[],this.host=t||"http://localhost:8080"};r.prototype.send=function(t){var e=n(t),r=new XMLHttpRequest;return r.open("POST",this.host,!1),r.send(JSON.stringify(e)),r.responseText},e.exports=r},{}],5:[function(t,e){var n=(t("./web3"),function(){this.queued=[],this.polls=[],this.ready=!1,this.provider=void 0,this.id=1;var t=this,e=function(){t.provider&&t.provider.poll&&t.polls.forEach(function(e){e.data._id=t.id,t.id++,t.provider.poll(e.data,e.id)}),setTimeout(e,12e3)};e()});n.prototype.send=function(t){if(t.args=t.args||[],t._id=this.id++,void 0===this.provider)return void console.error("provider is not set");var e=this.provider.send(t);return e=JSON.parse(e),e.result},n.prototype.set=function(t){void 0!==this.provider&&void 0!==this.provider.unload&&this.provider.unload(),this.provider=t,this.ready=!0},n.prototype.installed=function(){return void 0!==this.provider},n.prototype.startPolling=function(t,e){this.provider&&this.provider.poll&&this.polls.push({data:t,id:e})},n.prototype.stopPolling=function(t){for(var e=this.polls.length;e--;){var n=this.polls[e];n.id===t&&this.polls.splice(e,1)}},e.exports=n},{"./web3":7}],6:[function(t,e){var n=function(){};n.prototype.send=function(t){return navigator.qt.callMethod(JSON.stringify(t))},e.exports=n},{}],7:[function(t,e){var n=["wei","Kwei","Mwei","Gwei","szabo","finney","ether","grand","Mether","Gether","Tether","Pether","Eether","Zether","Yether","Nether","Dether","Vether","Uether"],r=function(){return[{name:"sha3",call:"web3_sha3"}]},i=function(){var t=function(t){return"string"==typeof t[0]?"eth_blockByHash":"eth_blockByNumber"},e=function(t){return"string"==typeof t[0]?"eth_transactionByHash":"eth_transactionByNumber"},n=function(t){return"string"==typeof t[0]?"eth_uncleByHash":"eth_uncleByNumber"},r=[{name:"balanceAt",call:"eth_balanceAt"},{name:"stateAt",call:"eth_stateAt"},{name:"storageAt",call:"eth_storageAt"},{name:"countAt",call:"eth_countAt"},{name:"codeAt",call:"eth_codeAt"},{name:"transact",call:"eth_transact"},{name:"call",call:"eth_call"},{name:"block",call:t},{name:"transaction",call:e},{name:"uncle",call:n},{name:"compilers",call:"eth_compilers"},{name:"lll",call:"eth_lll"},{name:"solidity",call:"eth_solidity"},{name:"serpent",call:"eth_serpent"},{name:"logs",call:"eth_logs"}];return r},o=function(){return[{name:"coinbase",getter:"eth_coinbase",setter:"eth_setCoinbase"},{name:"listening",getter:"eth_listening",setter:"eth_setListening"},{name:"mining",getter:"eth_mining",setter:"eth_setMining"},{name:"gasPrice",getter:"eth_gasPrice"},{name:"account",getter:"eth_account"},{name:"accounts",getter:"eth_accounts"},{name:"peerCount",getter:"eth_peerCount"},{name:"defaultBlock",getter:"eth_defaultBlock",setter:"eth_setDefaultBlock"},{name:"number",getter:"eth_number"}]},a=function(){return[{name:"put",call:"db_put"},{name:"get",call:"db_get"},{name:"putString",call:"db_putString"},{name:"getString",call:"db_getString"}]},f=function(){return[{name:"post",call:"shh_post"},{name:"newIdentity",call:"shh_newIdentity"},{name:"haveIdentity",call:"shh_haveIdentity"},{name:"newGroup",call:"shh_newGroup"},{name:"addToGroup",call:"shh_addToGroup"}]},s=function(){var t=function(t){return"string"==typeof t[0]?"eth_newFilterString":"eth_newFilter"};return[{name:"newFilter",call:t},{name:"uninstallFilter",call:"eth_uninstallFilter"},{name:"getMessages",call:"eth_filterLogs"}]},u=function(){return[{name:"newFilter",call:"shh_newFilter"},{name:"uninstallFilter",call:"shh_uninstallFilter"},{name:"getMessage",call:"shh_getMessages"}]},c=function(t,e){e.forEach(function(e){t[e.name]=function(){var t=Array.prototype.slice.call(arguments),n="function"==typeof e.call?e.call(t):e.call;return p.provider.send({call:n,args:t})}})},l=function(t,e){e.forEach(function(e){var n={};n.get=function(){return p.provider.send({call:e.getter})},e.setter&&(n.set=function(t){return p.provider.send({call:e.setter,args:[t]})}),Object.defineProperty(t,e.name,n)})},p={_callbacks:{},_events:{},providers:{},toHex:function(t){for(var e="",n=0;n<t.length;n++){var r=t.charCodeAt(n).toString(16);e+=r.length<2?"0"+r:r}return e},toAscii:function(t){var e="",n=0,r=t.length;for("0x"===t.substring(0,2)&&(n=2);r>n;n+=2){var i=parseInt(t.substr(n,2),16);if(0===i)break;e+=String.fromCharCode(i)}return e},fromAscii:function(t,e){e=void 0===e?0:e;for(var n=this.toHex(t);n.length<2*e;)n+="00";return"0x"+n},toDecimal:function(t){return new BigNumber(t.substring(2),16).toString(10)},fromDecimal:function(t){return"0x"+new BigNumber(t).toString(16)},toEth:function(t){for(var e="string"==typeof t?0===t.indexOf("0x")?parseInt(t.substr(2),16):parseInt(t):t,r=0,i=n;e>3e3&&r<i.length-1;)e/=1e3,r++;for(var o=e.toString().length<e.toFixed(2).length?e.toString():e.toFixed(2),a=function(t,e,n){return e+","+n};;){var f=o;if(o=o.replace(/(\d)(\d\d\d[\.\,])/,a),f===o)break}return o+" "+i[r]},eth:{watch:function(t){return new p.filter(t,h)}},db:{},shh:{watch:function(t){return new p.filter(t,d)}},haveProvider:function(){return!!p.provider.provider}};c(p,r()),c(p.eth,i()),l(p.eth,o()),c(p.db,a()),c(p.shh,f());var h={changed:"eth_changed"};c(h,s());var d={changed:"shh_changed"};c(d,u()),p.setProvider=function(t){p.provider.set(t)},e.exports=p},{}],web3:[function(t,e){var n=t("./lib/web3"),r=t("./lib/providermanager");n.provider=new r,n.filter=t("./lib/filter"),n.providers.HttpSyncProvider=t("./lib/httpsync"),n.providers.QtSyncProvider=t("./lib/qtsync"),n.eth.contract=t("./lib/contract"),n.abi=t("./lib/abi"),e.exports=n},{"./lib/abi":1,"./lib/contract":2,"./lib/filter":3,"./lib/httpsync":4,"./lib/providermanager":5,"./lib/qtsync":6,"./lib/web3":7}]},{},["web3"]);
\ No newline at end of file
diff --git a/example/contract.html b/example/contract.html
index 3d0260d34..f3dd7d3af 100644
--- a/example/contract.html
+++ b/example/contract.html
@@ -53,7 +53,7 @@
         var param = parseInt(document.getElementById('value').value);
 
         // call the contract
-        var res = contract.multiply(param).call();
+        var res = contract.multiply(param);
         document.getElementById('result').innerText = res[0];
     }
 
diff --git a/lib/contract.js b/lib/contract.js
index aa4188d40..550ad8bd3 100644
--- a/lib/contract.js
+++ b/lib/contract.js
@@ -36,18 +36,20 @@ var abi = require('./abi');
  *
  * var myContract = web3.eth.contract('0x0123123121', abi); // creation of contract object
  *
- * myContract.myMethod('this is test string param for call').call(); // myMethod call
- * myContract.myMethod('this is test string param for transact').transact() // myMethod transact
+ * myContract.myMethod('this is test string param for call'); // myMethod call (implicit, default)
+ * myContract.myMethod('this is test string param for call').call(); // myMethod call (explicit)
+ * myContract.transact().myMethod('this is test string param for transact'); // myMethod transact
  *
  * @param address - address of the contract, which should be called
  * @param desc - abi json description of the contract, which is being created
  * @returns contract object
  */
-var contract = function (address, desc) {
+
+var contract = function contract (address, desc) {
     var inputParser = abi.inputParser(desc);
     var outputParser = abi.outputParser(desc);
 
-    var contract = {};
+    var result = {};
 
     desc.forEach(function (method) {
 
@@ -56,43 +58,52 @@ var contract = function (address, desc) {
 
         var impl = function () {
             var params = Array.prototype.slice.call(arguments);
-            var parsed = inputParser[displayName][typeName].apply(null, params);
             var signature = abi.methodSignature(method.name);
+            var parsed = inputParser[displayName][typeName].apply(null, params);
 
-            return {
-                call: function (extra) {
-                    extra = extra || {};
-                    extra.to = address;
-                    extra.data = signature + parsed;
+            var options = contract._options || {};
+            options.to = address;
+            options.data = signature + parsed;
 
-                    var result = web3.eth.call(extra);
-                    return outputParser[displayName][typeName](result);
-                },
-                transact: function (extra) {
-                    extra = extra || {};
-                    extra.to = address;
-                    extra.data = signature + parsed;
+            var output = "";
+            if (contract._isTransact) {
+                // it's used byt natspec.js
+                // TODO: figure out better way to solve this
+                web3._currentContractAbi = desc;
+                web3._currentContractAddress = address;
 
-                    /// it's used by natspec.js
-                    /// TODO: figure a better way to solve this
-                    web3._currentContractAbi = desc;
-                    web3._currentContractAddress = address;
+                output = web3.eth.transact(options);
+            } else {
+                output = web3.eth.call(options);
+            }
 
-                    var result = web3.eth.transact(extra);
-                    return outputParser[displayName][typeName](result);
-                }
-            };
+            return outputParser[displayName][typeName](output);
         };
 
-        if (contract[displayName] === undefined) {
-            contract[displayName] = impl;
+        if (result[displayName] === undefined) {
+            result[displayName] = impl;
         }
 
-        contract[displayName][typeName] = impl;
-    });
+        result[displayName][typeName] = impl;
 
+    });
+    return result;
+};
+
+var transact = function (options) {
+    contract._isTransact = true;
+    contract._options = options;
     return contract;
 };
 
+var call = function (options) {
+    contract._isTransact = false;
+    contract._options = options;
+    return contract;
+};
+
+contract.transact = transact;
+contract.call = call;
+
 module.exports = contract;