diff --git a/dist/ethereum.js b/dist/ethereum.js
index e7e96d472..8062c7daf 100644
--- a/dist/ethereum.js
+++ b/dist/ethereum.js
@@ -33,15 +33,6 @@ BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });
 
 var ETH_PADDING = 32;
 
-// TODO: make these be actually accurate instead of falling back onto JS's doubles.
-var hexToDec = function (hex) {
-    return parseInt(hex, 16).toString();
-};
-
-var decToHex = function (dec) {
-    return parseInt(dec).toString(16);
-};
-
 /// Finds first index of array element matching pattern
 /// @param array
 /// @param callback pattern
@@ -86,55 +77,66 @@ var namedType = function (name) {
     };
 };
 
+var arrayType = function (type) {
+    return type.slice(-2) === '[]';
+};
+
+/// Formats input value to byte representation of int
+/// If value is negative, return it's two's complement
+/// If the value is floating point, round it down
+/// @returns right-aligned byte representation of int
+var formatInputInt = function (value) {
+    var padding = ETH_PADDING * 2;
+    if (value instanceof BigNumber || typeof value === 'number') {
+        if (typeof value === 'number')
+            value = new BigNumber(value);
+        value = value.round();
+
+        if (value.lessThan(0)) 
+            value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1);
+        value = value.toString(16);
+    }
+    else if (value.indexOf('0x') === 0)
+        value = value.substr(2);
+    else if (typeof value === 'string')
+        value = formatInputInt(new BigNumber(value));
+    else
+        value = (+value).toString(16);
+    return padLeft(value, padding);
+};
+
+/// Formats input value to byte representation of string
+/// @returns left-algined byte representation of string
+var formatInputString = function (value) {
+    return web3.fromAscii(value, ETH_PADDING).substr(2);
+};
+
+/// Formats input value to byte representation of bool
+/// @returns right-aligned byte representation bool
+var formatInputBool = function (value) {
+    return '000000000000000000000000000000000000000000000000000000000000000' + (value ?  '1' : '0');
+};
+
+var dynamicTypeBytes = function (type, value) {
+    // TODO: decide what to do with array of strings
+    if (arrayType(type) || prefixedType('string')(type))
+        return formatInputInt(value.length); 
+    return "";
+};
+
 /// Setups input formatters for solidity types
 /// @returns an array of input formatters 
 var setupInputTypes = function () {
     
-    /// Formats input value to byte representation of int
-    /// If value is negative, return it's two's complement
-    /// If the value is floating point, round it down
-    /// @returns right-aligned byte representation of int
-    var formatInt = function (value) {
-        var padding = ETH_PADDING * 2;
-        if (value instanceof BigNumber || typeof value === 'number') {
-            if (typeof value === 'number')
-                value = new BigNumber(value);
-            value = value.round();
-
-            if (value.lessThan(0)) 
-                value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1);
-            value = value.toString(16);
-        }
-        else if (value.indexOf('0x') === 0)
-            value = value.substr(2);
-        else if (typeof value === 'string')
-            value = formatInt(new BigNumber(value));
-        else
-            value = (+value).toString(16);
-        return padLeft(value, padding);
-    };
-
-    /// Formats input value to byte representation of string
-    /// @returns left-algined byte representation of string
-    var formatString = function (value) {
-        return web3.fromAscii(value, ETH_PADDING).substr(2);
-    };
-
-    /// Formats input value to byte representation of bool
-    /// @returns right-aligned byte representation bool
-    var formatBool = function (value) {
-        return '000000000000000000000000000000000000000000000000000000000000000' + (value ?  '1' : '0');
-    };
-
     return [
-        { type: prefixedType('uint'), format: formatInt },
-        { type: prefixedType('int'), format: formatInt },
-        { type: prefixedType('hash'), format: formatInt },
-        { type: prefixedType('string'), format: formatString }, 
-        { type: prefixedType('real'), format: formatInt },
-        { type: prefixedType('ureal'), format: formatInt },
-        { type: namedType('address'), format: formatInt },
-        { type: namedType('bool'), format: formatBool }
+        { type: prefixedType('uint'), format: formatInputInt },
+        { type: prefixedType('int'), format: formatInputInt },
+        { type: prefixedType('hash'), format: formatInputInt },
+        { type: prefixedType('string'), format: formatInputString }, 
+        { type: prefixedType('real'), format: formatInputInt },
+        { type: prefixedType('ureal'), format: formatInputInt },
+        { type: namedType('address'), format: formatInputInt },
+        { type: namedType('bool'), format: formatInputBool }
     ];
 };
 
@@ -156,7 +158,12 @@ var toAbiInput = function (json, methodName, params) {
     var method = json[index];
     var padding = ETH_PADDING * 2;
 
-    for (var i = 0; i < method.inputs.length; i++) {
+    /// first we iterate in search for dynamic 
+    method.inputs.forEach(function (input, index) {
+        bytes += dynamicTypeBytes(input.type, params[index]);
+    });
+
+    method.inputs.forEach(function (input, i) {
         var typeMatch = false;
         for (var j = 0; j < inputTypes.length && !typeMatch; j++) {
             typeMatch = inputTypes[j].type(method.inputs[i].type, params[i]);
@@ -166,62 +173,77 @@ var toAbiInput = function (json, methodName, params) {
         }
 
         var formatter = inputTypes[j - 1].format;
-        bytes += (formatter ? formatter(params[i]) : params[i]);
-    }
+        var toAppend = "";
+
+        if (arrayType(method.inputs[i].type))
+            toAppend = params[i].reduce(function (acc, curr) {
+                return acc + formatter(curr);
+            }, "");
+        else
+            toAppend = formatter(params[i]);
+
+        bytes += toAppend; 
+    });
     return bytes;
 };
 
+/// Formats input right-aligned input bytes to int
+/// @returns right-aligned input bytes formatted to int
+var formatOutputInt = function (value) {
+    // check if it's negative number
+    // it it is, return two's complement
+    var firstBit = new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1);
+    if (firstBit === '1') {
+        return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);
+    }
+    return new BigNumber(value, 16);
+};
+
+/// Formats big right-aligned input bytes to uint
+/// @returns right-aligned input bytes formatted to uint
+var formatOutputUInt = function (value) {
+    return new BigNumber(value, 16);
+};
+
+/// @returns right-aligned input bytes formatted to hex
+var formatOutputHash = function (value) {
+    return "0x" + value;
+};
+
+/// @returns right-aligned input bytes formatted to bool
+var formatOutputBool = function (value) {
+    return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;
+};
+
+/// @returns left-aligned input bytes formatted to ascii string
+var formatOutputString = function (value) {
+    return web3.toAscii(value);
+};
+
+/// @returns right-aligned input bytes formatted to address
+var formatOutputAddress = function (value) {
+    return "0x" + value.slice(value.length - 40, value.length);
+};
+
+var dynamicBytesLength = function (type) {
+    if (arrayType(type) || prefixedType('string')(type))
+        return ETH_PADDING * 2;
+    return 0;
+};
+
 /// Setups output formaters for solidity types
 /// @returns an array of output formatters
 var setupOutputTypes = function () {
 
-    /// Formats input right-aligned input bytes to int
-    /// @returns right-aligned input bytes formatted to int
-    var formatInt = function (value) {
-        // check if it's negative number
-        // it it is, return two's complement
-        var firstBit = new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1);
-        if (firstBit === '1') {
-            return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);
-        }
-        return new BigNumber(value, 16);
-    };
-
-    /// Formats big right-aligned input bytes to uint
-    /// @returns right-aligned input bytes formatted to uint
-    var formatUInt = function (value) {
-        return new BigNumber(value, 16);
-    };
-
-    /// @returns right-aligned input bytes formatted to hex
-    var formatHash = function (value) {
-        return "0x" + value;
-    };
-
-    /// @returns right-aligned input bytes formatted to bool
-    var formatBool = function (value) {
-        return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;
-    };
-
-    /// @returns left-aligned input bytes formatted to ascii string
-    var formatString = function (value) {
-        return web3.toAscii(value);
-    };
-
-    /// @returns right-aligned input bytes formatted to address
-    var formatAddress = function (value) {
-        return "0x" + value.slice(value.length - 40, value.length);
-    };
-
     return [
-        { type: prefixedType('uint'), format: formatUInt },
-        { type: prefixedType('int'), format: formatInt },
-        { type: prefixedType('hash'), format: formatHash },
-        { type: prefixedType('string'), format: formatString },
-        { type: prefixedType('real'), format: formatInt },
-        { type: prefixedType('ureal'), format: formatInt },
-        { type: namedType('address'), format: formatAddress },
-        { type: namedType('bool'), format: formatBool }
+        { type: prefixedType('uint'), format: formatOutputUInt },
+        { type: prefixedType('int'), format: formatOutputInt },
+        { type: prefixedType('hash'), format: formatOutputHash },
+        { type: prefixedType('string'), format: formatOutputString },
+        { type: prefixedType('real'), format: formatOutputInt },
+        { type: prefixedType('ureal'), format: formatOutputInt },
+        { type: namedType('address'), format: formatOutputAddress },
+        { type: namedType('bool'), format: formatOutputBool }
     ];
 };
 
@@ -244,22 +266,44 @@ var fromAbiOutput = function (json, methodName, output) {
     var result = [];
     var method = json[index];
     var padding = ETH_PADDING * 2;
-    for (var i = 0; i < method.outputs.length; i++) {
+
+    var dynamicPartLength = method.outputs.reduce(function (acc, curr) {
+        return acc + dynamicBytesLength(curr.type);
+    }, 0);
+    
+    var dynamicPart = output.slice(0, dynamicPartLength);
+    output = output.slice(dynamicPartLength);
+
+    method.outputs.forEach(function (out, i) {
         var typeMatch = false;
         for (var j = 0; j < outputTypes.length && !typeMatch; j++) {
             typeMatch = outputTypes[j].type(method.outputs[i].type);
         }
 
         if (!typeMatch) {
-            // not found output parsing
             console.error('output parser does not support type: ' + method.outputs[i].type);
-            continue;
         }
-        var res = output.slice(0, padding);
+
         var formatter = outputTypes[j - 1].format;
-        result.push(formatter ? formatter(res) : ("0x" + res));
-        output = output.slice(padding);
-    }
+        if (arrayType(method.outputs[i].type)) {
+            var size = formatOutputUInt(dynamicPart.slice(0, padding));
+            dynamicPart = dynamicPart.slice(padding);
+            var array = [];
+            for (var k = 0; k < size; k++) {
+                array.push(formatter(output.slice(0, padding))); 
+                output = output.slice(padding);
+            }
+            result.push(array);
+        }
+        else if (prefixedType('string')(method.outputs[i].type)) {
+            dynamicPart = dynamicPart.slice(padding); 
+            result.push(formatter(output.slice(0, padding)));
+            output = output.slice(padding);
+        } else {
+            result.push(formatter(output.slice(0, padding)));
+            output = output.slice(padding);
+        }
+    });
 
     return result;
 };
diff --git a/dist/ethereum.js.map b/dist/ethereum.js.map
index c6545e801..e2efa400b 100644
--- a/dist/ethereum.js.map
+++ b/dist/ethereum.js.map
@@ -14,12 +14,12 @@
     "index.js"
   ],
   "names": [],
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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// TODO: make these be actually accurate instead of falling back onto JS's doubles.\nvar hexToDec = function (hex) {\n    return parseInt(hex, 16).toString();\n};\n\nvar decToHex = function (dec) {\n    return parseInt(dec).toString(16);\n};\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\n/// Setups input formatters for solidity types\n/// @returns an array of input formatters \nvar setupInputTypes = function () {\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\n    var formatInt = 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 = formatInt(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\n    var formatString = 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\n    var formatBool = function (value) {\n        return '000000000000000000000000000000000000000000000000000000000000000' + (value ?  '1' : '0');\n    };\n\n    return [\n        { type: prefixedType('uint'), format: formatInt },\n        { type: prefixedType('int'), format: formatInt },\n        { type: prefixedType('hash'), format: formatInt },\n        { type: prefixedType('string'), format: formatString }, \n        { type: prefixedType('real'), format: formatInt },\n        { type: prefixedType('ureal'), format: formatInt },\n        { type: namedType('address'), format: formatInt },\n        { type: namedType('bool'), format: formatBool }\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    for (var i = 0; i < method.inputs.length; 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        bytes += (formatter ? formatter(params[i]) : params[i]);\n    }\n    return bytes;\n};\n\n/// Setups output formaters for solidity types\n/// @returns an array of output formatters\nvar setupOutputTypes = function () {\n\n    /// Formats input right-aligned input bytes to int\n    /// @returns right-aligned input bytes formatted to int\n    var formatInt = function (value) {\n        // check if it's negative number\n        // it it is, return two's complement\n        var firstBit = new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1);\n        if (firstBit === '1') {\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\n    var formatUInt = function (value) {\n        return new BigNumber(value, 16);\n    };\n\n    /// @returns right-aligned input bytes formatted to hex\n    var formatHash = function (value) {\n        return \"0x\" + value;\n    };\n\n    /// @returns right-aligned input bytes formatted to bool\n    var formatBool = function (value) {\n        return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;\n    };\n\n    /// @returns left-aligned input bytes formatted to ascii string\n    var formatString = function (value) {\n        return web3.toAscii(value);\n    };\n\n    /// @returns right-aligned input bytes formatted to address\n    var formatAddress = function (value) {\n        return \"0x\" + value.slice(value.length - 40, value.length);\n    };\n\n    return [\n        { type: prefixedType('uint'), format: formatUInt },\n        { type: prefixedType('int'), format: formatInt },\n        { type: prefixedType('hash'), format: formatHash },\n        { type: prefixedType('string'), format: formatString },\n        { type: prefixedType('real'), format: formatInt },\n        { type: prefixedType('ureal'), format: formatInt },\n        { type: namedType('address'), format: formatAddress },\n        { type: namedType('bool'), format: formatBool }\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    for (var i = 0; i < method.outputs.length; 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            // not found output parsing\n            console.error('output parser does not support type: ' + method.outputs[i].type);\n            continue;\n        }\n        var res = output.slice(0, padding);\n        var formatter = outputTypes[j - 1].format;\n        result.push(formatter ? formatter(res) : (\"0x\" + res));\n        output = output.slice(padding);\n    }\n\n    return result;\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        parser[method.name] = function () {\n            var params = Array.prototype.slice.call(arguments);\n            return toAbiInput(json, method.name, params);\n        };\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        parser[method.name] = function (output) {\n            return fromAbiOutput(json, method.name, output);\n        };\n    });\n\n    return parser;\n};\n\n/// @param json abi for contract\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 (json, name) {\n    var method = json[findMethodIndex(json, name)];\n    var result = name + '(';\n    var inputTypes = method.inputs.map(function (inp) {\n        return inp.type;\n    });\n    result += inputTypes.join(',');\n    result += ')';\n\n    return web3.sha3(web3.fromAscii(result));\n};\n\nmodule.exports = {\n    inputParser: inputParser,\n    outputParser: outputParser,\n    methodSignature: methodSignature\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 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/// 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\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: formatInputInt },\n        { type: prefixedType('ureal'), format: formatInputInt },\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/// 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    var firstBit = new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1);\n    if (firstBit === '1') {\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 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: formatOutputInt },\n        { type: prefixedType('ureal'), format: formatOutputInt },\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/// @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        parser[method.name] = function () {\n            var params = Array.prototype.slice.call(arguments);\n            return toAbiInput(json, method.name, params);\n        };\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        parser[method.name] = function (output) {\n            return fromAbiOutput(json, method.name, output);\n        };\n    });\n\n    return parser;\n};\n\n/// @param json abi for contract\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 (json, name) {\n    var method = json[findMethodIndex(json, name)];\n    var result = name + '(';\n    var inputTypes = method.inputs.map(function (inp) {\n        return inp.type;\n    });\n    result += inputTypes.join(',');\n    result += ')';\n\n    return web3.sha3(web3.fromAscii(result));\n};\n\nmodule.exports = {\n    inputParser: inputParser,\n    outputParser: outputParser,\n    methodSignature: methodSignature\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 autoprovider.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\n/*\n * @brief if qt object is available, uses QtProvider,\n * if not tries to connect over websockets\n * if it fails, it uses HttpRpcProvider\n */\n\n// TODO: is these line is supposed to be here? \nif (\"build\" !== 'build') {/*\n    var WebSocket = require('ws'); // jshint ignore:line\n    var web3 = require('./web3'); // jshint ignore:line\n*/}\n\n/**\n * AutoProvider object prototype is implementing 'provider protocol'\n * Automatically tries to setup correct provider(Qt, WebSockets or HttpRpc)\n * First it checkes if we are ethereum browser (if navigator.qt object is available)\n * if yes, we are using QtProvider\n * if no, we check if it is possible to establish websockets connection with ethereum (ws://localhost:40404/eth is default)\n * if it's not possible, we are using httprpc provider (http://localhost:8080)\n * The constructor allows you to specify uris on which we are trying to connect over http or websockets\n * You can do that by passing objects with fields httrpc and websockets\n */\nvar AutoProvider = function (userOptions) {\n    if (web3.haveProvider()) {\n        return;\n    }\n\n    // before we determine what provider we are, we have to cache request\n    this.sendQueue = [];\n    this.onmessageQueue = [];\n\n    if (navigator.qt) {\n        this.provider = new web3.providers.QtProvider();\n        return;\n    }\n\n    userOptions = userOptions || {};\n    var options = {\n        httprpc: userOptions.httprpc || 'http://localhost:8080',\n        websockets: userOptions.websockets || 'ws://localhost:40404/eth'\n    };\n\n    var self = this;\n    var closeWithSuccess = function (success) {\n        ws.close();\n        if (success) {\n            self.provider = new web3.providers.WebSocketProvider(options.websockets);\n        } else {\n            self.provider = new web3.providers.HttpRpcProvider(options.httprpc);\n            self.poll = self.provider.poll.bind(self.provider);\n        }\n        self.sendQueue.forEach(function (payload) {\n            self.provider(payload);\n        });\n        self.onmessageQueue.forEach(function (handler) {\n            self.provider.onmessage = handler;\n        });\n    };\n\n    var ws = new WebSocket(options.websockets);\n\n    ws.onopen = function() {\n        closeWithSuccess(true);\n    };\n\n    ws.onerror = function() {\n        closeWithSuccess(false);\n    };\n};\n\n/// Sends message forward to the provider, that is being used\n/// if provider is not yet set, enqueues the message\nAutoProvider.prototype.send = function (payload) {\n    if (this.provider) {\n        this.provider.send(payload);\n        return;\n    }\n    this.sendQueue.push(payload);\n};\n\n/// On incoming message sends the message to the provider that is currently being used\nObject.defineProperty(AutoProvider.prototype, 'onmessage', {\n    set: function (handler) {\n        if (this.provider) {\n            this.provider.onmessage = handler;\n            return;\n        }\n        this.onmessageQueue.push(handler);\n    }\n});\n\nmodule.exports = AutoProvider;\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/// method signature length in bytes\nvar ETH_METHOD_SIGNATURE_LENGTH = 4;\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        contract[method.name] = function () {\n            var params = Array.prototype.slice.call(arguments);\n            var parsed = inputParser[method.name].apply(null, params);\n\n            var onSuccess = function (result) {\n                return outputParser[method.name](result);\n            };\n\n            return {\n                call: function (extra) {\n                    extra = extra || {};\n                    extra.to = address;\n                    return abi.methodSignature(desc, method.name).then(function (signature) {\n                        extra.data = signature.slice(0, 2 + ETH_METHOD_SIGNATURE_LENGTH * 2) + parsed;\n                        return web3.eth.call(extra).then(onSuccess);\n                    });\n                },\n                transact: function (extra) {\n                    extra = extra || {};\n                    extra.to = address;\n                    return abi.methodSignature(desc, method.name).then(function (signature) {\n                        extra.data = signature.slice(0, 2 + ETH_METHOD_SIGNATURE_LENGTH * 2) + parsed;\n                        return web3.eth.transact(extra).then(onSuccess);\n                    });\n                }\n            };\n        };\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 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    var self = this;\n    this.promise = impl.newFilter(options);\n    this.promise.then(function (id) {\n        self.id = id;\n        web3.on(impl.changed, id, self.trigger.bind(self));\n        web3.provider.startPolling({call: impl.changed, args: [id]}, id);\n    });\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    var self = this;\n    this.promise.then(function(id) {\n        self.callbacks.push(callback);\n    });\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    var self = this;\n    this.promise.then(function (id) {\n        self.impl.uninstallFilter(id);\n        web3.provider.stopPolling(id);\n        web3.off(impl.changed, id);\n    });\n};\n\n/// should be called to manually trigger getting latest messages from the client\nFilter.prototype.messages = function() {\n    var self = this;\n    return this.promise.then(function (id) {\n        return self.impl.getMessages(id);\n    });\n};\n\n/// alias for messages\nFilter.prototype.logs = function () {\n    return this.messages();\n};\n\nmodule.exports = Filter;\n",
diff --git a/dist/ethereum.min.js b/dist/ethereum.min.js
index 60907044f..670e6d774 100644
--- a/dist/ethereum.min.js
+++ b/dist/ethereum.min.js
@@ -1 +1 @@
-require=function e(t,n,r){function o(s,a){if(!n[s]){if(!t[s]){var u="function"==typeof require&&require;if(!a&&u)return u(s,!0);if(i)return i(s,!0);var f=new Error("Cannot find module '"+s+"'");throw f.code="MODULE_NOT_FOUND",f}var c=n[s]={exports:{}};t[s][0].call(c.exports,function(e){var n=t[s][1][e];return o(n?n:e)},c,c.exports,e,t,n,r)}return n[s].exports}for(var i="function"==typeof require&&require,s=0;s<r.length;s++)o(r[s]);return o}({1:[function(e,t){var n=e("./web3");BigNumber.config({ROUNDING_MODE:BigNumber.ROUND_DOWN});var r=32,o=function(e,t){for(var n=!1,r=0;r<e.length&&!n;r++)n=t(e[r]);return n?r-1:-1},i=function(e,t){return o(e,function(e){return e.name===t})},s=function(e,t,n){return new Array(t-e.length+1).join(n?n:"0")+e},a=function(e){return function(t){return 0===t.indexOf(e)}},u=function(e){return function(t){return e===t}},f=function(){var e=function(t){var n=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?e(new BigNumber(t)):(+t).toString(16),s(t,n)},t=function(e){return n.fromAscii(e,r).substr(2)},o=function(e){return"000000000000000000000000000000000000000000000000000000000000000"+(e?"1":"0")};return[{type:a("uint"),format:e},{type:a("int"),format:e},{type:a("hash"),format:e},{type:a("string"),format:t},{type:a("real"),format:e},{type:a("ureal"),format:e},{type:u("address"),format:e},{type:u("bool"),format:o}]},c=f(),l=function(e,t,n){var r="",o=i(e,t);if(-1!==o){for(var s=e[o],a=0;a<s.inputs.length;a++){for(var u=!1,f=0;f<c.length&&!u;f++)u=c[f].type(s.inputs[a].type,n[a]);u||console.error("input parser does not support type: "+s.inputs[a].type);var l=c[f-1].format;r+=l?l(n[a]):n[a]}return r}},h=function(){var e=function(e){var t=new BigNumber(e.substr(0,1),16).toString(2).substr(0,1);return"1"===t?new BigNumber(e,16).minus(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16)).minus(1):new BigNumber(e,16)},t=function(e){return new BigNumber(e,16)},r=function(e){return"0x"+e},o=function(e){return"0000000000000000000000000000000000000000000000000000000000000001"===e?!0:!1},i=function(e){return n.toAscii(e)},s=function(e){return"0x"+e.slice(e.length-40,e.length)};return[{type:a("uint"),format:t},{type:a("int"),format:e},{type:a("hash"),format:r},{type:a("string"),format:i},{type:a("real"),format:e},{type:a("ureal"),format:e},{type:u("address"),format:s},{type:u("bool"),format:o}]},p=h(),d=function(e,t,n){var o=i(e,t);if(-1!==o){n=n.slice(2);for(var s=[],a=e[o],u=2*r,f=0;f<a.outputs.length;f++){for(var c=!1,l=0;l<p.length&&!c;l++)c=p[l].type(a.outputs[f].type);if(c){var h=n.slice(0,u),d=p[l-1].format;s.push(d?d(h):"0x"+h),n=n.slice(u)}else console.error("output parser does not support 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this.provider?void(this.provider.onmessage=e):void this.onmessageQueue.push(e)}}),t.exports=n},{}],3:[function(e,t){var n=e("./web3"),r=e("./abi"),o=4,i=function(e,t){var i=r.inputParser(t),s=r.outputParser(t),a={};return t.forEach(function(u){a[u.name]=function(){var a=Array.prototype.slice.call(arguments),f=i[u.name].apply(null,a),c=function(e){return s[u.name](e)};return{call:function(i){return i=i||{},i.to=e,r.methodSignature(t,u.name).then(function(e){return i.data=e.slice(0,2+2*o)+f,n.eth.call(i).then(c)})},transact:function(i){return i=i||{},i.to=e,r.methodSignature(t,u.name).then(function(e){return i.data=e.slice(0,2+2*o)+f,n.eth.transact(i).then(c)})}}}}),a};t.exports=i},{"./abi":1,"./web3":8}],4:[function(e,t){var n=e("./web3"),r=function(e,t){this.impl=t,this.callbacks=[];var r=this;this.promise=t.newFilter(e),this.promise.then(function(e){r.id=e,n.on(t.changed,e,r.trigger.bind(r)),n.provider.startPolling({call:t.changed,args:[e]},e)})};r.prototype.arrived=function(e){this.changed(e)},r.prototype.changed=function(e){var t=this;this.promise.then(function(){t.callbacks.push(e)})},r.prototype.trigger=function(e){for(var t=0;t<this.callbacks.length;t++)this.callbacks[t].call(this,e)},r.prototype.uninstall=function(){var e=this;this.promise.then(function(t){e.impl.uninstallFilter(t),n.provider.stopPolling(t),n.off(impl.changed,t)})},r.prototype.messages=function(){var e=this;return this.promise.then(function(t){return e.impl.getMessages(t)})},r.prototype.logs=function(){return this.messages()},t.exports=r},{"./web3":8}],5:[function(e,t){function n(e){return{jsonrpc:"2.0",method:e.call,params:e.args,id:e._id}}function r(e){var t=JSON.parse(e);return{_id:t.id,data:t.result,error:t.error}}var o=function(e){this.handlers=[],this.host=e};o.prototype.sendRequest=function(e,t){var r=n(e),o=new XMLHttpRequest;o.open("POST",this.host,!0),o.send(JSON.stringify(r)),o.onreadystatechange=function(){4===o.readyState&&t&&t(o)}},o.prototype.send=function(e){var t=this;this.sendRequest(e,function(e){t.handlers.forEach(function(n){n.call(t,r(e.responseText))})})},o.prototype.poll=function(e,t){var n=this;this.sendRequest(e,function(r){var o=JSON.parse(r.responseText);!o.error&&(o.result instanceof Array?0!==o.result.length:o.result)&&n.handlers.forEach(function(r){r.call(n,{_event:e.call,_id:t,data:o.result})})})},Object.defineProperty(o.prototype,"onmessage",{set:function(e){this.handlers.push(e)}}),t.exports=o},{}],6:[function(e,t){var n=e("./web3"),r=function(){this.queued=[],this.polls=[],this.ready=!1,this.provider=void 0,this.id=1;var e=this,t=function(){e.provider&&e.provider.poll&&e.polls.forEach(function(t){t.data._id=e.id,e.id++,e.provider.poll(t.data,t.id)}),setTimeout(t,12e3)};t()};r.prototype.send=function(e,t){e._id=this.id,t&&(n._callbacks[e._id]=t),e.args=e.args||[],this.id++,void 0!==this.provider?this.provider.send(e):(console.warn("provider is not set"),this.queued.push(e))},r.prototype.set=function(e){void 0!==this.provider&&void 0!==this.provider.unload&&this.provider.unload(),this.provider=e,this.ready=!0},r.prototype.sendQueued=function(){for(var e=0;this.queued.length;e++)this.send(this.queued[e])},r.prototype.installed=function(){return void 0!==this.provider},r.prototype.startPolling=function(e,t){this.provider&&this.provider.poll&&this.polls.push({data:e,id:t})},r.prototype.stopPolling=function(e){for(var t=this.polls.length;t--;){var n=this.polls[t];n.id===e&&this.polls.splice(t,1)}},t.exports=r},{"./web3":8}],7:[function(e,t){var n=function(){this.handlers=[];var e=this;navigator.qt.onmessage=function(t){e.handlers.forEach(function(n){n.call(e,JSON.parse(t.data))})}};n.prototype.send=function(e){navigator.qt.postMessage(JSON.stringify(e))},Object.defineProperty(n.prototype,"onmessage",{set:function(e){this.handlers.push(e)}}),t.exports=n},{}],8:[function(e,t){function n(e){return e instanceof Promise?Promise.resolve(e):e instanceof Array?new Promise(function(t){var r=e.map(function(e){return n(e)});return Promise.all(r).then(function(n){for(var r=0;r<e.length;r++)e[r]=n[r];t(e)})}):e instanceof Object?new Promise(function(t){var r=Object.keys(e),o=r.map(function(t){return n(e[t])});return Promise.all(o).then(function(n){for(var o=0;o<r.length;o++)e[r[o]]=n[o];t(e)})}):Promise.resolve(e)}function r(e){if(void 0!==e._event)return void v.trigger(e._event,e._id,e.data);if(e._id){var t=v._callbacks[e._id];t&&(t.call(this,e.error,e.data),delete v._callbacks[e._id])}}var o=function(){return[{name:"sha3",call:"web3_sha3"}]},i=function(){var e=function(e){return"string"==typeof e[0]?"eth_blockByHash":"eth_blockByNumber"},t=function(e){return"string"==typeof e[0]?"eth_transactionByHash":"eth_transactionByNumber"},n=function(e){return"string"==typeof e[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:e},{name:"transaction",call:t},{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},s=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"}]},u=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"}]},f=function(){var e=function(e){return"string"==typeof e[0]?"eth_newFilterString":"eth_newFilter"};return[{name:"newFilter",call:e},{name:"uninstallFilter",call:"eth_uninstallFilter"},{name:"getMessages",call:"eth_filterLogs"}]},c=function(){return[{name:"newFilter",call:"shh_newFilter"},{name:"uninstallFilter",call:"shh_uninstallFilter"},{name:"getMessage",call:"shh_getMessages"}]},l=function(e,t){t.forEach(function(t){e[t.name]=function(){return n(Array.prototype.slice.call(arguments)).then(function(e){var n="function"==typeof t.call?t.call(e):t.call;return{call:n,args:e}}).then(function(e){return new Promise(function(t,n){v.provider.send(e,function(e,r){return e?void n(e):void t(r)})})}).catch(function(e){console.error(e)})}})},p=function(e,t){t.forEach(function(t){var r={};r.get=function(){return new Promise(function(e,n){v.provider.send({call:t.getter},function(t,r){return t?void n(t):void e(r)})})},t.setter&&(r.set=function(e){return n([e]).then(function(e){return new Promise(function(n){v.provider.send({call:t.setter,args:e},function(e,t){return e?void reject(e):void n(t)})})}).catch(function(e){console.error(e)})}),Object.defineProperty(e,t.name,r)})},h=function(e){return parseInt(e,16).toString()},d=function(e){return parseInt(e).toString(16)},v={_callbacks:{},_events:{},providers:{},toHex:function(e){for(var t="",n=0;n<e.length;n++){var r=e.charCodeAt(n).toString(16);t+=r.length<2?"0"+r:r}return t},toAscii:function(e){var t="",n=0,r=e.length;for("0x"===e.substring(0,2)&&(n=2);r>n;n+=2){var o=parseInt(e.substr(n,2),16);if(0===o)break;t+=String.fromCharCode(o)}return t},fromAscii:function(e,t){t=void 0===t?0:t;for(var n=this.toHex(e);n.length<2*t;)n+="00";return"0x"+n},toDecimal:function(e){return h(e.substring(2))},fromDecimal:function(e){return"0x"+d(e)},toEth:function(e){for(var t="string"==typeof e?0===e.indexOf("0x")?parseInt(e.substr(2),16):parseInt(e):e,n=0,r=["wei","Kwei","Mwei","Gwei","szabo","finney","ether","grand","Mether","Gether","Tether","Pether","Eether","Zether","Yether","Nether","Dether","Vether","Uether"];t>3e3&&n<r.length-1;)t/=1e3,n++;for(var o=t.toString().length<t.toFixed(2).length?t.toString():t.toFixed(2),i=function(e,t,n){return t+","+n};;){var s=o;if(o=o.replace(/(\d)(\d\d\d[\.\,])/,i),s===o)break}return o+" "+r[n]},eth:{watch:function(e){return new v.filter(e,g)}},db:{},shh:{watch:function(e){return new v.filter(e,m)}},on:function(e,t,n){return void 0===v._events[e]&&(v._events[e]={}),v._events[e][t]=n,this},off:function(e,t){return void 0!==v._events[e]&&delete v._events[e][t],this},trigger:function(e,t,n){var r=v._events[e];if(r&&r[t]){var o=r[t];o(n)}},haveProvider:function(){return!!v.provider.provider}};l(v,o()),l(v.eth,i()),p(v.eth,s()),l(v.db,a()),l(v.shh,u());var g={changed:"eth_changed"};l(g,f());var m={changed:"shh_changed"};l(m,c()),v.setProvider=function(e){e.onmessage=r,v.provider.set(e),v.provider.sendQueued()},t.exports=v},{}],9:[function(e,t){var n=function(e){this.handlers=[],this.queued=[],this.ready=!1,this.ws=new WebSocket(e);var t=this;this.ws.onmessage=function(e){for(var n=0;n<t.handlers.length;n++)t.handlers[n].call(t,JSON.parse(e.data),e)},this.ws.onopen=function(){t.ready=!0;for(var e=0;e<t.queued.length;e++)t.send(t.queued[e])}};n.prototype.send=function(e){if(this.ready){var t=JSON.stringify(e);this.ws.send(t)}else this.queued.push(e)},n.prototype.onMessage=function(e){this.handlers.push(e)},n.prototype.unload=function(){this.ws.close()},Object.defineProperty(n.prototype,"onmessage",{set:function(e){this.onMessage(e)}}),"undefined"!=typeof t&&(t.exports=n)},{}],web3:[function(e,t){var n=e("./lib/web3"),r=e("./lib/providermanager");n.provider=new r,n.filter=e("./lib/filter"),n.providers.WebSocketProvider=e("./lib/websocket"),n.providers.HttpRpcProvider=e("./lib/httprpc"),n.providers.QtProvider=e("./lib/qt"),n.providers.AutoProvider=e("./lib/autoprovider"),n.eth.contract=e("./lib/contract"),t.exports=n},{"./lib/autoprovider":2,"./lib/contract":3,"./lib/filter":4,"./lib/httprpc":5,"./lib/providermanager":6,"./lib/qt":7,"./lib/web3":8,"./lib/websocket":9}]},{},["web3"]);
\ No newline at end of file
diff --git a/lib/abi.js b/lib/abi.js
index 5a01f43fd..319b06066 100644
--- a/lib/abi.js
+++ b/lib/abi.js
@@ -32,15 +32,6 @@ BigNumber.config({ ROUNDING_MODE: BigNumber.ROUND_DOWN });
 
 var ETH_PADDING = 32;
 
-// TODO: make these be actually accurate instead of falling back onto JS's doubles.
-var hexToDec = function (hex) {
-    return parseInt(hex, 16).toString();
-};
-
-var decToHex = function (dec) {
-    return parseInt(dec).toString(16);
-};
-
 /// Finds first index of array element matching pattern
 /// @param array
 /// @param callback pattern
@@ -85,55 +76,66 @@ var namedType = function (name) {
     };
 };
 
+var arrayType = function (type) {
+    return type.slice(-2) === '[]';
+};
+
+/// Formats input value to byte representation of int
+/// If value is negative, return it's two's complement
+/// If the value is floating point, round it down
+/// @returns right-aligned byte representation of int
+var formatInputInt = function (value) {
+    var padding = ETH_PADDING * 2;
+    if (value instanceof BigNumber || typeof value === 'number') {
+        if (typeof value === 'number')
+            value = new BigNumber(value);
+        value = value.round();
+
+        if (value.lessThan(0)) 
+            value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1);
+        value = value.toString(16);
+    }
+    else if (value.indexOf('0x') === 0)
+        value = value.substr(2);
+    else if (typeof value === 'string')
+        value = formatInputInt(new BigNumber(value));
+    else
+        value = (+value).toString(16);
+    return padLeft(value, padding);
+};
+
+/// Formats input value to byte representation of string
+/// @returns left-algined byte representation of string
+var formatInputString = function (value) {
+    return web3.fromAscii(value, ETH_PADDING).substr(2);
+};
+
+/// Formats input value to byte representation of bool
+/// @returns right-aligned byte representation bool
+var formatInputBool = function (value) {
+    return '000000000000000000000000000000000000000000000000000000000000000' + (value ?  '1' : '0');
+};
+
+var dynamicTypeBytes = function (type, value) {
+    // TODO: decide what to do with array of strings
+    if (arrayType(type) || prefixedType('string')(type))
+        return formatInputInt(value.length); 
+    return "";
+};
+
 /// Setups input formatters for solidity types
 /// @returns an array of input formatters 
 var setupInputTypes = function () {
     
-    /// Formats input value to byte representation of int
-    /// If value is negative, return it's two's complement
-    /// If the value is floating point, round it down
-    /// @returns right-aligned byte representation of int
-    var formatInt = function (value) {
-        var padding = ETH_PADDING * 2;
-        if (value instanceof BigNumber || typeof value === 'number') {
-            if (typeof value === 'number')
-                value = new BigNumber(value);
-            value = value.round();
-
-            if (value.lessThan(0)) 
-                value = new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16).plus(value).plus(1);
-            value = value.toString(16);
-        }
-        else if (value.indexOf('0x') === 0)
-            value = value.substr(2);
-        else if (typeof value === 'string')
-            value = formatInt(new BigNumber(value));
-        else
-            value = (+value).toString(16);
-        return padLeft(value, padding);
-    };
-
-    /// Formats input value to byte representation of string
-    /// @returns left-algined byte representation of string
-    var formatString = function (value) {
-        return web3.fromAscii(value, ETH_PADDING).substr(2);
-    };
-
-    /// Formats input value to byte representation of bool
-    /// @returns right-aligned byte representation bool
-    var formatBool = function (value) {
-        return '000000000000000000000000000000000000000000000000000000000000000' + (value ?  '1' : '0');
-    };
-
     return [
-        { type: prefixedType('uint'), format: formatInt },
-        { type: prefixedType('int'), format: formatInt },
-        { type: prefixedType('hash'), format: formatInt },
-        { type: prefixedType('string'), format: formatString }, 
-        { type: prefixedType('real'), format: formatInt },
-        { type: prefixedType('ureal'), format: formatInt },
-        { type: namedType('address'), format: formatInt },
-        { type: namedType('bool'), format: formatBool }
+        { type: prefixedType('uint'), format: formatInputInt },
+        { type: prefixedType('int'), format: formatInputInt },
+        { type: prefixedType('hash'), format: formatInputInt },
+        { type: prefixedType('string'), format: formatInputString }, 
+        { type: prefixedType('real'), format: formatInputInt },
+        { type: prefixedType('ureal'), format: formatInputInt },
+        { type: namedType('address'), format: formatInputInt },
+        { type: namedType('bool'), format: formatInputBool }
     ];
 };
 
@@ -155,7 +157,12 @@ var toAbiInput = function (json, methodName, params) {
     var method = json[index];
     var padding = ETH_PADDING * 2;
 
-    for (var i = 0; i < method.inputs.length; i++) {
+    /// first we iterate in search for dynamic 
+    method.inputs.forEach(function (input, index) {
+        bytes += dynamicTypeBytes(input.type, params[index]);
+    });
+
+    method.inputs.forEach(function (input, i) {
         var typeMatch = false;
         for (var j = 0; j < inputTypes.length && !typeMatch; j++) {
             typeMatch = inputTypes[j].type(method.inputs[i].type, params[i]);
@@ -165,62 +172,77 @@ var toAbiInput = function (json, methodName, params) {
         }
 
         var formatter = inputTypes[j - 1].format;
-        bytes += (formatter ? formatter(params[i]) : params[i]);
-    }
+        var toAppend = "";
+
+        if (arrayType(method.inputs[i].type))
+            toAppend = params[i].reduce(function (acc, curr) {
+                return acc + formatter(curr);
+            }, "");
+        else
+            toAppend = formatter(params[i]);
+
+        bytes += toAppend; 
+    });
     return bytes;
 };
 
+/// Formats input right-aligned input bytes to int
+/// @returns right-aligned input bytes formatted to int
+var formatOutputInt = function (value) {
+    // check if it's negative number
+    // it it is, return two's complement
+    var firstBit = new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1);
+    if (firstBit === '1') {
+        return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);
+    }
+    return new BigNumber(value, 16);
+};
+
+/// Formats big right-aligned input bytes to uint
+/// @returns right-aligned input bytes formatted to uint
+var formatOutputUInt = function (value) {
+    return new BigNumber(value, 16);
+};
+
+/// @returns right-aligned input bytes formatted to hex
+var formatOutputHash = function (value) {
+    return "0x" + value;
+};
+
+/// @returns right-aligned input bytes formatted to bool
+var formatOutputBool = function (value) {
+    return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;
+};
+
+/// @returns left-aligned input bytes formatted to ascii string
+var formatOutputString = function (value) {
+    return web3.toAscii(value);
+};
+
+/// @returns right-aligned input bytes formatted to address
+var formatOutputAddress = function (value) {
+    return "0x" + value.slice(value.length - 40, value.length);
+};
+
+var dynamicBytesLength = function (type) {
+    if (arrayType(type) || prefixedType('string')(type))
+        return ETH_PADDING * 2;
+    return 0;
+};
+
 /// Setups output formaters for solidity types
 /// @returns an array of output formatters
 var setupOutputTypes = function () {
 
-    /// Formats input right-aligned input bytes to int
-    /// @returns right-aligned input bytes formatted to int
-    var formatInt = function (value) {
-        // check if it's negative number
-        // it it is, return two's complement
-        var firstBit = new BigNumber(value.substr(0, 1), 16).toString(2).substr(0, 1);
-        if (firstBit === '1') {
-            return new BigNumber(value, 16).minus(new BigNumber('ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 16)).minus(1);
-        }
-        return new BigNumber(value, 16);
-    };
-
-    /// Formats big right-aligned input bytes to uint
-    /// @returns right-aligned input bytes formatted to uint
-    var formatUInt = function (value) {
-        return new BigNumber(value, 16);
-    };
-
-    /// @returns right-aligned input bytes formatted to hex
-    var formatHash = function (value) {
-        return "0x" + value;
-    };
-
-    /// @returns right-aligned input bytes formatted to bool
-    var formatBool = function (value) {
-        return value === '0000000000000000000000000000000000000000000000000000000000000001' ? true : false;
-    };
-
-    /// @returns left-aligned input bytes formatted to ascii string
-    var formatString = function (value) {
-        return web3.toAscii(value);
-    };
-
-    /// @returns right-aligned input bytes formatted to address
-    var formatAddress = function (value) {
-        return "0x" + value.slice(value.length - 40, value.length);
-    };
-
     return [
-        { type: prefixedType('uint'), format: formatUInt },
-        { type: prefixedType('int'), format: formatInt },
-        { type: prefixedType('hash'), format: formatHash },
-        { type: prefixedType('string'), format: formatString },
-        { type: prefixedType('real'), format: formatInt },
-        { type: prefixedType('ureal'), format: formatInt },
-        { type: namedType('address'), format: formatAddress },
-        { type: namedType('bool'), format: formatBool }
+        { type: prefixedType('uint'), format: formatOutputUInt },
+        { type: prefixedType('int'), format: formatOutputInt },
+        { type: prefixedType('hash'), format: formatOutputHash },
+        { type: prefixedType('string'), format: formatOutputString },
+        { type: prefixedType('real'), format: formatOutputInt },
+        { type: prefixedType('ureal'), format: formatOutputInt },
+        { type: namedType('address'), format: formatOutputAddress },
+        { type: namedType('bool'), format: formatOutputBool }
     ];
 };
 
@@ -243,22 +265,44 @@ var fromAbiOutput = function (json, methodName, output) {
     var result = [];
     var method = json[index];
     var padding = ETH_PADDING * 2;
-    for (var i = 0; i < method.outputs.length; i++) {
+
+    var dynamicPartLength = method.outputs.reduce(function (acc, curr) {
+        return acc + dynamicBytesLength(curr.type);
+    }, 0);
+    
+    var dynamicPart = output.slice(0, dynamicPartLength);
+    output = output.slice(dynamicPartLength);
+
+    method.outputs.forEach(function (out, i) {
         var typeMatch = false;
         for (var j = 0; j < outputTypes.length && !typeMatch; j++) {
             typeMatch = outputTypes[j].type(method.outputs[i].type);
         }
 
         if (!typeMatch) {
-            // not found output parsing
             console.error('output parser does not support type: ' + method.outputs[i].type);
-            continue;
         }
-        var res = output.slice(0, padding);
+
         var formatter = outputTypes[j - 1].format;
-        result.push(formatter ? formatter(res) : ("0x" + res));
-        output = output.slice(padding);
-    }
+        if (arrayType(method.outputs[i].type)) {
+            var size = formatOutputUInt(dynamicPart.slice(0, padding));
+            dynamicPart = dynamicPart.slice(padding);
+            var array = [];
+            for (var k = 0; k < size; k++) {
+                array.push(formatter(output.slice(0, padding))); 
+                output = output.slice(padding);
+            }
+            result.push(array);
+        }
+        else if (prefixedType('string')(method.outputs[i].type)) {
+            dynamicPart = dynamicPart.slice(padding); 
+            result.push(formatter(output.slice(0, padding)));
+            output = output.slice(padding);
+        } else {
+            result.push(formatter(output.slice(0, padding)));
+            output = output.slice(padding);
+        }
+    });
 
     return result;
 };
diff --git a/test/abi.parsers.js b/test/abi.parsers.js
index ea2e00b13..740d52eca 100644
--- a/test/abi.parsers.js
+++ b/test/abi.parsers.js
@@ -40,9 +40,9 @@ describe('abi', function() {
                 "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
                 );
             assert.equal(
-                    parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
-                    "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
-                    );
+                parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
+                "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+                );
             assert.equal(parser.test(0.1), "0000000000000000000000000000000000000000000000000000000000000000");
             assert.equal(parser.test(3.9), "0000000000000000000000000000000000000000000000000000000000000003");
             assert.equal(parser.test('0.1'), "0000000000000000000000000000000000000000000000000000000000000000");
@@ -71,9 +71,9 @@ describe('abi', function() {
                 "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
                 );
             assert.equal(
-                    parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
-                    "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
-                    );
+                parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
+                "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+                );
             assert.equal(parser.test(0.1), "0000000000000000000000000000000000000000000000000000000000000000");
             assert.equal(parser.test(3.9), "0000000000000000000000000000000000000000000000000000000000000003");
             assert.equal(parser.test('0.1'), "0000000000000000000000000000000000000000000000000000000000000000");
@@ -101,9 +101,9 @@ describe('abi', function() {
                 "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
                 );
             assert.equal(
-                    parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
-                    "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
-                    );
+                parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
+                "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+                );
             assert.equal(parser.test(0.1), "0000000000000000000000000000000000000000000000000000000000000000");
             assert.equal(parser.test(3.9), "0000000000000000000000000000000000000000000000000000000000000003");
             assert.equal(parser.test('0.1'), "0000000000000000000000000000000000000000000000000000000000000000");
@@ -134,9 +134,9 @@ describe('abi', function() {
                 "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
                 );
             assert.equal(
-                    parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
-                    "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
-                    );
+                parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
+                "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+                );
             assert.equal(parser.test(0.1), "0000000000000000000000000000000000000000000000000000000000000000");
             assert.equal(parser.test(3.9), "0000000000000000000000000000000000000000000000000000000000000003");
             assert.equal(parser.test('0.1'), "0000000000000000000000000000000000000000000000000000000000000000");
@@ -166,9 +166,9 @@ describe('abi', function() {
                 "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
                 );
             assert.equal(
-                    parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
-                    "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
-                    );
+                parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
+                "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+                );
             assert.equal(parser.test(0.1), "0000000000000000000000000000000000000000000000000000000000000000");
             assert.equal(parser.test(3.9), "0000000000000000000000000000000000000000000000000000000000000003");
             assert.equal(parser.test('0.1'), "0000000000000000000000000000000000000000000000000000000000000000");
@@ -199,9 +199,9 @@ describe('abi', function() {
                 "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
                 );
             assert.equal(
-                    parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
-                    "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
-                    );
+                parser.test(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 16)),
+                "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
+                );
             assert.equal(parser.test(0.1), "0000000000000000000000000000000000000000000000000000000000000000");
             assert.equal(parser.test(3.9), "0000000000000000000000000000000000000000000000000000000000000003");
             assert.equal(parser.test('0.1'), "0000000000000000000000000000000000000000000000000000000000000000");
@@ -307,8 +307,14 @@ describe('abi', function() {
             var parser = abi.inputParser(d);
 
             // then
-            assert.equal(parser.test('hello'), "68656c6c6f000000000000000000000000000000000000000000000000000000");
-            assert.equal(parser.test('world'), "776f726c64000000000000000000000000000000000000000000000000000000");
+            assert.equal(
+                parser.test('hello'), 
+                "000000000000000000000000000000000000000000000000000000000000000568656c6c6f000000000000000000000000000000000000000000000000000000"
+                );
+            assert.equal(
+                parser.test('world'),
+                "0000000000000000000000000000000000000000000000000000000000000005776f726c64000000000000000000000000000000000000000000000000000000"
+                );
         });
 
         it('should use proper method name', function () {
@@ -346,9 +352,34 @@ describe('abi', function() {
 
             //then
             assert.equal(parser.test(1), "0000000000000000000000000000000000000000000000000000000000000001");
-            assert.equal(parser.test2('hello'), "68656c6c6f000000000000000000000000000000000000000000000000000000");
+            assert.equal(
+                parser.test2('hello'), 
+                "000000000000000000000000000000000000000000000000000000000000000568656c6c6f000000000000000000000000000000000000000000000000000000"
+                );
 
         });
+
+        it('should parse input array of ints', function () {
+            
+            // given
+            var d = clone(description);
+
+            d[0].inputs = [
+                { type: "int[]" }
+            ];
+
+            // when
+            var parser = abi.inputParser(d);
+
+            // then
+            assert.equal(
+                parser.test([5, 6]),
+                "0000000000000000000000000000000000000000000000000000000000000002" + 
+                "0000000000000000000000000000000000000000000000000000000000000005" + 
+                "0000000000000000000000000000000000000000000000000000000000000006"
+                );
+        });
+
     });
 
     describe('outputParser', function() {
@@ -365,8 +396,18 @@ describe('abi', function() {
             var parser = abi.outputParser(d);
             
             // then
-            assert.equal(parser.test("0x68656c6c6f000000000000000000000000000000000000000000000000000000")[0], 'hello');
-            assert.equal(parser.test("0x776f726c64000000000000000000000000000000000000000000000000000000")[0], 'world');
+            assert.equal(
+                parser.test("0x" + 
+                    "0000000000000000000000000000000000000000000000000000000000000005" +
+                    "68656c6c6f000000000000000000000000000000000000000000000000000000")[0],
+                'hello'
+                );
+            assert.equal(
+                parser.test("0x" + 
+                    "0000000000000000000000000000000000000000000000000000000000000005" +
+                    "776f726c64000000000000000000000000000000000000000000000000000000")[0], 
+                'world'
+                );
 
         });
 
@@ -613,12 +654,21 @@ describe('abi', function() {
 
             // then
             assert.equal(
-                parser.test("0x68656c6c6f000000000000000000000000000000000000000000000000000000776f726c64000000000000000000000000000000000000000000000000000000")[0],
+                parser.test("0x" +
+                    "0000000000000000000000000000000000000000000000000000000000000005" +
+                    "0000000000000000000000000000000000000000000000000000000000000005" +
+                    "68656c6c6f000000000000000000000000000000000000000000000000000000" + 
+                    "776f726c64000000000000000000000000000000000000000000000000000000")[0],
                 'hello'
                 );
             assert.equal(
-                parser.test("0x68656c6c6f000000000000000000000000000000000000000000000000000000776f726c64000000000000000000000000000000000000000000000000000000")[1], 
-                'world');
+                parser.test("0x" +
+                    "0000000000000000000000000000000000000000000000000000000000000005" +
+                    "0000000000000000000000000000000000000000000000000000000000000005" +
+                    "68656c6c6f000000000000000000000000000000000000000000000000000000" + 
+                    "776f726c64000000000000000000000000000000000000000000000000000000")[1],
+                'world'
+                );
 
         });
         
@@ -658,7 +708,38 @@ describe('abi', function() {
 
             //then
             assert.equal(parser.test("0000000000000000000000000000000000000000000000000000000000000001")[0], 1);
-            assert.equal(parser.test2("0x68656c6c6f000000000000000000000000000000000000000000000000000000")[0], "hello");
+            assert.equal(parser.test2("0x" + 
+                    "0000000000000000000000000000000000000000000000000000000000000005" +
+                    "68656c6c6f000000000000000000000000000000000000000000000000000000")[0],
+                "hello"
+                );
+
+        });
+
+        it('should parse output array', function () {
+            
+            // given
+            var d = clone(description);
+            d[0].outputs = [
+                { type: 'int[]' }
+            ];
+
+            // when
+            var parser = abi.outputParser(d);
+
+            // then
+            assert.equal(parser.test("0x" +
+                    "0000000000000000000000000000000000000000000000000000000000000002" + 
+                    "0000000000000000000000000000000000000000000000000000000000000005" + 
+                    "0000000000000000000000000000000000000000000000000000000000000006")[0][0],
+                5
+                );
+            assert.equal(parser.test("0x" +
+                    "0000000000000000000000000000000000000000000000000000000000000002" + 
+                    "0000000000000000000000000000000000000000000000000000000000000005" + 
+                    "0000000000000000000000000000000000000000000000000000000000000006")[0][1],
+                6
+                );
 
         });