diff --git a/dist/ethereum.js b/dist/ethereum.js
index f146c25a3eac5492e7b02895e7f9b6c47f265240..06dfff0b7bddb9a8b254ee3ecfd2365c5acdd579 100644
--- a/dist/ethereum.js
+++ b/dist/ethereum.js
@@ -210,7 +210,7 @@ module.exports = {
 };
 
 
-},{"./const":2,"./formatters":6,"./types":10,"./utils":11,"./web3":12}],2:[function(require,module,exports){
+},{"./const":2,"./formatters":6,"./types":11,"./utils":12,"./web3":13}],2:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -487,7 +487,7 @@ var contract = function (address, desc) {
 module.exports = contract;
 
 
-},{"./abi":1,"./event":4,"./utils":11,"./web3":12}],4:[function(require,module,exports){
+},{"./abi":1,"./event":4,"./utils":12,"./web3":13}],4:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -624,7 +624,7 @@ module.exports = {
 };
 
 
-},{"./abi":1,"./utils":11}],5:[function(require,module,exports){
+},{"./abi":1,"./utils":12}],5:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -727,7 +727,7 @@ Filter.prototype.logs = function () {
 
 module.exports = Filter;
 
-},{"./web3":12}],6:[function(require,module,exports){
+},{"./web3":13}],6:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -883,7 +883,7 @@ module.exports = {
 };
 
 
-},{"./const":2,"./utils":11}],7:[function(require,module,exports){
+},{"./const":2,"./utils":12}],7:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -924,7 +924,8 @@ HttpSyncProvider.prototype.send = function (payload) {
     request.send(JSON.stringify(payload));
     
     // check request.status
-    return request.responseText;
+    var result = request.responseText;
+    return JSON.parse(result);
 };
 
 module.exports = HttpSyncProvider;
@@ -947,6 +948,69 @@ module.exports = HttpSyncProvider;
     You should have received a copy of the GNU Lesser General Public License
     along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.
 */
+/** @file jsonrpc.js
+ * @authors:
+ *   Marek Kotewicz <marek@ethdev.com>
+ * @date 2015
+ */
+
+var messageId = 1;
+
+/// Should be called to valid json create payload object
+/// @param method of jsonrpc call, required
+/// @param params, an array of method params, optional
+/// @returns valid jsonrpc payload object
+var toPayload = function (method, params) {
+    if (!method)
+        console.error('jsonrpc method should be specified!');
+
+    return {
+        jsonrpc: '2.0',
+        method: method,
+        params: params || [],
+        id: messageId++
+    }; 
+};
+
+/// Should be called to check if jsonrpc response is valid
+/// @returns true if response doesn't have error field
+var isValidResponse = function (response) {
+    return response && !response.error;
+};
+
+/// Should be called to create batch payload object
+/// @param messages, an array of objects with method (required) and params (optional) fields
+var toBatchPayload = function (messages) {
+    return messages.map(function (message) {
+        return toPayload(message.method, message.params);
+    }); 
+};
+
+module.exports = {
+    toPayload: toPayload,
+    isValidResponse: isValidResponse,
+    toBatchPayload: toBatchPayload
+};
+
+
+
+},{}],9:[function(require,module,exports){
+/*
+    This file is part of ethereum.js.
+
+    ethereum.js is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    ethereum.js is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.
+*/
 /** @file providermanager.js
  * @authors:
  *   Jeffrey Wilcke <jeff@ethdev.com>
@@ -956,7 +1020,9 @@ module.exports = HttpSyncProvider;
  * @date 2014
  */
 
-var web3 = require('./web3'); // jshint ignore:line
+var web3 = require('./web3'); 
+var jsonrpc = require('./jsonrpc');
+
 
 /**
  * Provider manager object prototype
@@ -970,21 +1036,34 @@ var web3 = require('./web3'); // jshint ignore:line
 var ProviderManager = function() {
     this.polls = [];
     this.provider = undefined;
-    this.id = 1;
 
     var self = this;
     var poll = function () {
         if (self.provider) {
-            self.polls.forEach(function (data) {
-                var result = self.send(data.data);
-            
+            var pollsBatch = self.polls.map(function (data) {
+                return data.data;
+            });
+
+            var payload = jsonrpc.toBatchPayload(pollsBatch);
+            var results = self.provider.send(payload);
+
+            self.polls.forEach(function (data, index) {
+                var result = results[index];
+                
+                if (!jsonrpc.isValidResponse(result)) {
+                    return;
+                }
+
+                result = result.result;
                 // dont call the callback if result is not an array, or empty one
                 if (!(result instanceof Array) || result.length === 0) {
                     return;
                 }
 
                 data.callback(result);
+
             });
+
         }
         setTimeout(poll, 1000);
     };
@@ -994,21 +1073,16 @@ var ProviderManager = function() {
 /// sends outgoing requests
 /// @params data - an object with at least 'method' property
 ProviderManager.prototype.send = function(data) {
-
-    data.jsonrpc = '2.0';
-    data.params = data.params || [];
-    data.id = this.id++;
+    var payload = jsonrpc.toPayload(data.method, data.params);
 
     if (this.provider === undefined) {
         console.error('provider is not set');
         return null; 
     }
 
-    //TODO: handle error here? 
-    var result = this.provider.send(data);
-    result = JSON.parse(result);
+    var result = this.provider.send(payload);
 
-    if (result.error) {
+    if (!jsonrpc.isValidResponse(result)) {
         console.log(result.error);
         return null;
     }
@@ -1040,7 +1114,7 @@ ProviderManager.prototype.stopPolling = function (pollId) {
 module.exports = ProviderManager;
 
 
-},{"./web3":12}],9:[function(require,module,exports){
+},{"./jsonrpc":8,"./web3":13}],10:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -1068,13 +1142,14 @@ var QtSyncProvider = function () {
 };
 
 QtSyncProvider.prototype.send = function (payload) {
-    return navigator.qt.callMethod(JSON.stringify(payload));
+    var result = navigator.qt.callMethod(JSON.stringify(payload));
+    return JSON.parse(result);
 };
 
 module.exports = QtSyncProvider;
 
 
-},{}],10:[function(require,module,exports){
+},{}],11:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -1155,7 +1230,7 @@ module.exports = {
 };
 
 
-},{"./formatters":6}],11:[function(require,module,exports){
+},{"./formatters":6}],12:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -1299,7 +1374,7 @@ module.exports = {
 };
 
 
-},{"./const":2}],12:[function(require,module,exports){
+},{"./const":2}],13:[function(require,module,exports){
 /*
     This file is part of ethereum.js.
 
@@ -1557,7 +1632,7 @@ web3.setProvider = function(provider) {
 module.exports = web3;
 
 
-},{"./utils":11}],"web3":[function(require,module,exports){
+},{"./utils":12}],"web3":[function(require,module,exports){
 var web3 = require('./lib/web3');
 var ProviderManager = require('./lib/providermanager');
 web3.provider = new ProviderManager();
@@ -1570,7 +1645,7 @@ web3.abi = require('./lib/abi');
 
 module.exports = web3;
 
-},{"./lib/abi":1,"./lib/contract":3,"./lib/filter":5,"./lib/httpsync":7,"./lib/providermanager":8,"./lib/qtsync":9,"./lib/web3":12}]},{},["web3"])
+},{"./lib/abi":1,"./lib/contract":3,"./lib/filter":5,"./lib/httpsync":7,"./lib/providermanager":9,"./lib/qtsync":10,"./lib/web3":13}]},{},["web3"])
 
 
 //# sourceMappingURL=ethereum.js.map
\ No newline at end of file
diff --git a/dist/ethereum.js.map b/dist/ethereum.js.map
index b22f009ea98e9ea0c9787b7ff56d33c6bedd7681..e95e646f1c9385a001a209d033e29e8b8af25ff8 100644
--- a/dist/ethereum.js.map
+++ b/dist/ethereum.js.map
@@ -9,6 +9,7 @@
     "lib/filter.js",
     "lib/formatters.js",
     "lib/httpsync.js",
+    "lib/jsonrpc.js",
     "lib/providermanager.js",
     "lib/qtsync.js",
     "lib/types.js",
@@ -17,7 +18,7 @@
     "index.js"
   ],
   "names": [],
-  "mappings": 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+  "mappings": 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   "file": "generated.js",
   "sourceRoot": "",
   "sourcesContent": [
@@ -28,9 +29,10 @@
     "/*\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 event.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n * @date 2014\n */\n\nvar abi = require('./abi');\nvar utils = require('./utils');\n\n/// filter inputs array && returns only indexed (or not) inputs\n/// @param inputs array\n/// @param bool if result should be an array of indexed params on not\n/// @returns array of (not?) indexed params\nvar filterInputs = function (inputs, indexed) {\n    return inputs.filter(function (current) {\n        return current.indexed === indexed;\n    });\n};\n\nvar inputWithName = function (inputs, name) {\n    var index = utils.findIndex(inputs, function (input) {\n        return input.name === name;\n    });\n    \n    if (index === -1) {\n        console.error('indexed param with name ' + name + ' not found');\n        return undefined;\n    }\n    return inputs[index];\n};\n\nvar indexedParamsToTopics = function (event, indexed) {\n    // sort keys?\n    return Object.keys(indexed).map(function (key) {\n        var inputs = [inputWithName(filterInputs(event.inputs, true), key)];\n\n        var value = indexed[key];\n        if (value instanceof Array) {\n            return value.map(function (v) {\n                return abi.formatInput(inputs, [v]);\n            }); \n        }\n        return abi.formatInput(inputs, [value]);\n    });\n};\n\nvar inputParser = function (address, signature, event) {\n    \n    // valid options are 'earliest', 'latest', 'offset' and 'max', as defined for 'eth.watch'\n    return function (indexed, options) {\n        var o = options || {};\n        o.address = address;\n        o.topic = [];\n        o.topic.push(signature);\n        if (indexed) {\n            o.topic = o.topic.concat(indexedParamsToTopics(event, indexed));\n        }\n        return o;\n    };\n};\n\nvar getArgumentsObject = function (inputs, indexed, notIndexed) {\n    var indexedCopy = indexed.slice();\n    var notIndexedCopy = notIndexed.slice();\n    return inputs.reduce(function (acc, current) {\n        var value;\n        if (current.indexed)\n            value = indexed.splice(0, 1)[0];\n        else\n            value = notIndexed.splice(0, 1)[0];\n\n        acc[current.name] = value;\n        return acc;\n    }, {}); \n};\n \nvar outputParser = function (event) {\n    \n    return function (output) {\n        var result = {\n            event: utils.extractDisplayName(event.name),\n            number: output.number,\n            args: {}\n        };\n\n        if (!output.topic) {\n            return result;\n        }\n       \n        var indexedOutputs = filterInputs(event.inputs, true);\n        var indexedData = \"0x\" + output.topic.slice(1, output.topic.length).map(function (topic) { return topic.slice(2); }).join(\"\");\n        var indexedRes = abi.formatOutput(indexedOutputs, indexedData);\n\n        var notIndexedOutputs = filterInputs(event.inputs, false);\n        var notIndexedRes = abi.formatOutput(notIndexedOutputs, output.data);\n\n        result.args = getArgumentsObject(event.inputs, indexedRes, notIndexedRes);\n\n        return result;\n    };\n};\n\nvar getMatchingEvent = function (events, payload) {\n    for (var i = 0; i < events.length; i++) {\n        var signature = abi.eventSignatureFromAscii(events[i].name); \n        if (signature === payload.topic[0]) {\n            return events[i];\n        }\n    }\n    return undefined;\n};\n\n\nmodule.exports = {\n    inputParser: inputParser,\n    outputParser: outputParser,\n    getMatchingEvent: getMatchingEvent\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 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\n/// TODO: change 'options' name cause it may be not the best matching one, since we have events\nvar Filter = function(options, impl) {\n\n    if (typeof options !== \"string\") {\n\n        // topics property is deprecated, warn about it!\n        if (options.topics) {\n            console.warn('\"topics\" is deprecated, use \"topic\" instead');\n        }\n        \n        this._onWatchResult = options._onWatchEventResult;\n\n        // evaluate lazy properties\n        options = {\n            to: options.to,\n            topic: options.topic,\n            earliest: options.earliest,\n            latest: options.latest,\n            max: options.max,\n            skip: options.skip,\n            address: options.address\n        };\n\n    }\n    \n    this.impl = impl;\n    this.callbacks = [];\n\n    this.id = impl.newFilter(options);\n    web3.provider.startPolling({method: impl.changed, params: [this.id]}, this.id, this.trigger.bind(this));\n};\n\n/// alias for changed*\nFilter.prototype.arrived = function(callback) {\n    this.changed(callback);\n};\nFilter.prototype.happened = 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        for (var j = 0; j < messages.length; j++) {\n            var message = this._onWatchResult ? this._onWatchResult(messages[j]) : messages[j];\n            this.callbacks[i].call(this, message);\n        }\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};\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 formatters.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n * @date 2015\n */\n\nif (\"build\" !== 'build') {/*\n    var BigNumber = require('bignumber.js'); // jshint ignore:line\n*/}\n\nvar utils = require('./utils');\nvar c = require('./const');\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/// 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 = c.ETH_PADDING * 2;\n    if (value instanceof BigNumber || typeof value === 'number') {\n        if (typeof value === 'number')\n            value = new BigNumber(value);\n        BigNumber.config(c.ETH_BIGNUMBER_ROUNDING_MODE);\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 utils.fromAscii(value, c.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\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    value = value || \"0\";\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    value = value || \"0\";\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 utils.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\n\nmodule.exports = {\n    formatInputInt: formatInputInt,\n    formatInputString: formatInputString,\n    formatInputBool: formatInputBool,\n    formatInputReal: formatInputReal,\n    formatOutputInt: formatOutputInt,\n    formatOutputUInt: formatOutputUInt,\n    formatOutputReal: formatOutputReal,\n    formatOutputUReal: formatOutputUReal,\n    formatOutputHash: formatOutputHash,\n    formatOutputBool: formatOutputBool,\n    formatOutputString: formatOutputString,\n    formatOutputAddress: formatOutputAddress\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 httpsync.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\nif (\"build\" !== 'build') {/*\n        var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest; // jshint ignore:line\n*/}\n\nvar HttpSyncProvider = function (host) {\n    this.handlers = [];\n    this.host = host || 'http://localhost:8080';\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(payload));\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.polls = [];\n    this.provider = undefined;\n    this.id = 1;\n\n    var self = this;\n    var poll = function () {\n        if (self.provider) {\n            self.polls.forEach(function (data) {\n                var result = self.send(data.data);\n            \n                // dont call the callback if result is not an array, or empty one\n                if (!(result instanceof Array) || result.length === 0) {\n                    return;\n                }\n\n                data.callback(result);\n            });\n        }\n        setTimeout(poll, 1000);\n    };\n    poll();\n};\n\n/// sends outgoing requests\n/// @params data - an object with at least 'method' property\nProviderManager.prototype.send = function(data) {\n\n    data.jsonrpc = '2.0';\n    data.params = data.params || [];\n    data.id = this.id++;\n\n    if (this.provider === undefined) {\n        console.error('provider is not set');\n        return null; \n    }\n\n    //TODO: handle error here? \n    var result = this.provider.send(data);\n    result = JSON.parse(result);\n\n    if (result.error) {\n        console.log(result.error);\n        return null;\n    }\n\n    return result.result;\n};\n\n/// setups provider, which will be used for sending messages\nProviderManager.prototype.set = function(provider) {\n    this.provider = provider;\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, callback) {\n    this.polls.push({data: data, id: pollId, callback: callback});\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",
-    "/*\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 qtsync.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\nvar QtSyncProvider = function () {\n};\n\nQtSyncProvider.prototype.send = function (payload) {\n    return navigator.qt.callMethod(JSON.stringify(payload));\n};\n\nmodule.exports = QtSyncProvider;\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 httpsync.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\nif (\"build\" !== 'build') {/*\n        var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest; // jshint ignore:line\n*/}\n\nvar HttpSyncProvider = function (host) {\n    this.handlers = [];\n    this.host = host || 'http://localhost:8080';\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(payload));\n    \n    // check request.status\n    var result = request.responseText;\n    return JSON.parse(result);\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 jsonrpc.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n * @date 2015\n */\n\nvar messageId = 1;\n\n/// Should be called to valid json create payload object\n/// @param method of jsonrpc call, required\n/// @param params, an array of method params, optional\n/// @returns valid jsonrpc payload object\nvar toPayload = function (method, params) {\n    if (!method)\n        console.error('jsonrpc method should be specified!');\n\n    return {\n        jsonrpc: '2.0',\n        method: method,\n        params: params || [],\n        id: messageId++\n    }; \n};\n\n/// Should be called to check if jsonrpc response is valid\n/// @returns true if response doesn't have error field\nvar isValidResponse = function (response) {\n    return response && !response.error;\n};\n\n/// Should be called to create batch payload object\n/// @param messages, an array of objects with method (required) and params (optional) fields\nvar toBatchPayload = function (messages) {\n    return messages.map(function (message) {\n        return toPayload(message.method, message.params);\n    }); \n};\n\nmodule.exports = {\n    toPayload: toPayload,\n    isValidResponse: isValidResponse,\n    toBatchPayload: toBatchPayload\n};\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 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'); \nvar jsonrpc = require('./jsonrpc');\n\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.polls = [];\n    this.provider = undefined;\n\n    var self = this;\n    var poll = function () {\n        if (self.provider) {\n            var pollsBatch = self.polls.map(function (data) {\n                return data.data;\n            });\n\n            var payload = jsonrpc.toBatchPayload(pollsBatch);\n            var results = self.provider.send(payload);\n\n            self.polls.forEach(function (data, index) {\n                var result = results[index];\n                \n                if (!jsonrpc.isValidResponse(result)) {\n                    return;\n                }\n\n                result = result.result;\n                // dont call the callback if result is not an array, or empty one\n                if (!(result instanceof Array) || result.length === 0) {\n                    return;\n                }\n\n                data.callback(result);\n\n            });\n\n        }\n        setTimeout(poll, 1000);\n    };\n    poll();\n};\n\n/// sends outgoing requests\n/// @params data - an object with at least 'method' property\nProviderManager.prototype.send = function(data) {\n    var payload = jsonrpc.toPayload(data.method, data.params);\n\n    if (this.provider === undefined) {\n        console.error('provider is not set');\n        return null; \n    }\n\n    var result = this.provider.send(payload);\n\n    if (!jsonrpc.isValidResponse(result)) {\n        console.log(result.error);\n        return null;\n    }\n\n    return result.result;\n};\n\n/// setups provider, which will be used for sending messages\nProviderManager.prototype.set = function(provider) {\n    this.provider = provider;\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, callback) {\n    this.polls.push({data: data, id: pollId, callback: callback});\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",
+    "/*\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 qtsync.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n *   Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\nvar QtSyncProvider = function () {\n};\n\nQtSyncProvider.prototype.send = function (payload) {\n    var result = navigator.qt.callMethod(JSON.stringify(payload));\n    return JSON.parse(result);\n};\n\nmodule.exports = QtSyncProvider;\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 types.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n * @date 2015\n */\n\nvar f = require('./formatters');\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 inputTypes = function () {\n    \n    return [\n        { type: prefixedType('uint'), format: f.formatInputInt },\n        { type: prefixedType('int'), format: f.formatInputInt },\n        { type: prefixedType('hash'), format: f.formatInputInt },\n        { type: prefixedType('string'), format: f.formatInputString }, \n        { type: prefixedType('real'), format: f.formatInputReal },\n        { type: prefixedType('ureal'), format: f.formatInputReal },\n        { type: namedType('address'), format: f.formatInputInt },\n        { type: namedType('bool'), format: f.formatInputBool }\n    ];\n};\n\n/// Setups output formaters for solidity types\n/// @returns an array of output formatters\nvar outputTypes = function () {\n\n    return [\n        { type: prefixedType('uint'), format: f.formatOutputUInt },\n        { type: prefixedType('int'), format: f.formatOutputInt },\n        { type: prefixedType('hash'), format: f.formatOutputHash },\n        { type: prefixedType('string'), format: f.formatOutputString },\n        { type: prefixedType('real'), format: f.formatOutputReal },\n        { type: prefixedType('ureal'), format: f.formatOutputUReal },\n        { type: namedType('address'), format: f.formatOutputAddress },\n        { type: namedType('bool'), format: f.formatOutputBool }\n    ];\n};\n\nmodule.exports = {\n    prefixedType: prefixedType,\n    namedType: namedType,\n    inputTypes: inputTypes,\n    outputTypes: outputTypes\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 utils.js\n * @authors:\n *   Marek Kotewicz <marek@ethdev.com>\n * @date 2015\n */\n\nvar c = require('./const');\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 ascii string representation of hex value prefixed with 0x\nvar toAscii = function(hex) {\n// Find termination\n    var str = \"\";\n    var i = 0, l = hex.length;\n    if (hex.substring(0, 2) === '0x') {\n        i = 2;\n    }\n    for (; i < l; i+=2) {\n        var code = parseInt(hex.substr(i, 2), 16);\n        if (code === 0) {\n            break;\n        }\n\n        str += String.fromCharCode(code);\n    }\n\n    return str;\n};\n    \nvar toHex = function(str) {\n    var hex = \"\";\n    for(var i = 0; i < str.length; i++) {\n        var n = str.charCodeAt(i).toString(16);\n        hex += n.length < 2 ? '0' + n : n;\n    }\n\n    return hex;\n};\n\n/// @returns hex representation (prefixed by 0x) of ascii string\nvar fromAscii = function(str, pad) {\n    pad = pad === undefined ? 0 : pad;\n    var hex = toHex(str);\n    while (hex.length < pad*2)\n        hex += \"00\";\n    return \"0x\" + hex;\n};\n\n/// @returns display name for function/event eg. multiply(uint256) -> multiply\nvar extractDisplayName = function (name) {\n    var length = name.indexOf('('); \n    return length !== -1 ? name.substr(0, length) : name;\n};\n\n/// @returns overloaded part of function/event name\nvar extractTypeName = function (name) {\n    /// TODO: make it invulnerable\n    var length = name.indexOf('(');\n    return length !== -1 ? name.substr(length + 1, name.length - 1 - (length + 1)).replace(' ', '') : \"\";\n};\n\n/// Filters all function from input abi\n/// @returns abi array with filtered objects of type 'function'\nvar filterFunctions = function (json) {\n    return json.filter(function (current) {\n        return current.type === 'function'; \n    }); \n};\n\n/// Filters all events form input abi\n/// @returns abi array with filtered objects of type 'event'\nvar filterEvents = function (json) {\n    return json.filter(function (current) {\n        return current.type === 'event';\n    });\n};\n\n/// used to transform value/string to eth string\n/// TODO: use BigNumber.js to parse int\n/// TODO: add tests for it!\nvar toEth = function (str) {\n    var val = typeof str === \"string\" ? str.indexOf('0x') === 0 ? parseInt(str.substr(2), 16) : parseInt(str) : str;\n    var unit = 0;\n    var units = c.ETH_UNITS;\n    while (val > 3000 && unit < units.length - 1)\n    {\n        val /= 1000;\n        unit++;\n    }\n    var s = val.toString().length < val.toFixed(2).length ? val.toString() : val.toFixed(2);\n    var replaceFunction = function($0, $1, $2) {\n        return $1 + ',' + $2;\n    };\n\n    while (true) {\n        var o = s;\n        s = s.replace(/(\\d)(\\d\\d\\d[\\.\\,])/, replaceFunction);\n        if (o === s)\n            break;\n    }\n    return s + ' ' + units[unit];\n};\n\nmodule.exports = {\n    findIndex: findIndex,\n    toAscii: toAscii,\n    fromAscii: fromAscii,\n    extractDisplayName: extractDisplayName,\n    extractTypeName: extractTypeName,\n    filterFunctions: filterFunctions,\n    filterEvents: filterEvents,\n    toEth: toEth\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 web3.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\nif (\"build\" !== 'build') {/*\n    var BigNumber = require('bignumber.js');\n*/}\n\nvar utils = require('./utils');\n\n/// @returns an array of objects describing web3 api methods\nvar web3Methods = function () {\n    return [\n    { name: 'sha3', call: 'web3_sha3' }\n    ];\n};\n\n/// @returns an array of objects describing web3.eth api methods\nvar ethMethods = function () {\n    var blockCall = function (args) {\n        return typeof args[0] === \"string\" ? \"eth_blockByHash\" : \"eth_blockByNumber\";\n    };\n\n    var transactionCall = function (args) {\n        return typeof args[0] === \"string\" ? 'eth_transactionByHash' : 'eth_transactionByNumber';\n    };\n\n    var uncleCall = function (args) {\n        return typeof args[0] === \"string\" ? 'eth_uncleByHash' : 'eth_uncleByNumber';\n    };\n\n    var methods = [\n    { name: 'balanceAt', call: 'eth_balanceAt' },\n    { name: 'stateAt', call: 'eth_stateAt' },\n    { name: 'storageAt', call: 'eth_storageAt' },\n    { name: 'countAt', call: 'eth_countAt'},\n    { name: 'codeAt', call: 'eth_codeAt' },\n    { name: 'transact', call: 'eth_transact' },\n    { name: 'call', call: 'eth_call' },\n    { name: 'block', call: blockCall },\n    { name: 'transaction', call: transactionCall },\n    { name: 'uncle', call: uncleCall },\n    { name: 'compilers', call: 'eth_compilers' },\n    { name: 'flush', call: 'eth_flush' },\n    { name: 'lll', call: 'eth_lll' },\n    { name: 'solidity', call: 'eth_solidity' },\n    { name: 'serpent', call: 'eth_serpent' },\n    { name: 'logs', call: 'eth_logs' }\n    ];\n    return methods;\n};\n\n/// @returns an array of objects describing web3.eth api properties\nvar ethProperties = function () {\n    return [\n    { name: 'coinbase', getter: 'eth_coinbase', setter: 'eth_setCoinbase' },\n    { name: 'listening', getter: 'eth_listening', setter: 'eth_setListening' },\n    { name: 'mining', getter: 'eth_mining', setter: 'eth_setMining' },\n    { name: 'gasPrice', getter: 'eth_gasPrice' },\n    { name: 'accounts', getter: 'eth_accounts' },\n    { name: 'peerCount', getter: 'eth_peerCount' },\n    { name: 'defaultBlock', getter: 'eth_defaultBlock', setter: 'eth_setDefaultBlock' },\n    { name: 'number', getter: 'eth_number'}\n    ];\n};\n\n/// @returns an array of objects describing web3.db api methods\nvar dbMethods = function () {\n    return [\n    { name: 'put', call: 'db_put' },\n    { name: 'get', call: 'db_get' },\n    { name: 'putString', call: 'db_putString' },\n    { name: 'getString', call: 'db_getString' }\n    ];\n};\n\n/// @returns an array of objects describing web3.shh api methods\nvar shhMethods = function () {\n    return [\n    { name: 'post', call: 'shh_post' },\n    { name: 'newIdentity', call: 'shh_newIdentity' },\n    { name: 'haveIdentity', call: 'shh_haveIdentity' },\n    { name: 'newGroup', call: 'shh_newGroup' },\n    { name: 'addToGroup', call: 'shh_addToGroup' }\n    ];\n};\n\n/// @returns an array of objects describing web3.eth.watch api methods\nvar ethWatchMethods = function () {\n    var newFilter = function (args) {\n        return typeof args[0] === 'string' ? 'eth_newFilterString' : 'eth_newFilter';\n    };\n\n    return [\n    { name: 'newFilter', call: newFilter },\n    { name: 'uninstallFilter', call: 'eth_uninstallFilter' },\n    { name: 'getMessages', call: 'eth_filterLogs' }\n    ];\n};\n\n/// @returns an array of objects describing web3.shh.watch api methods\nvar shhWatchMethods = function () {\n    return [\n    { name: 'newFilter', call: 'shh_newFilter' },\n    { name: 'uninstallFilter', call: 'shh_uninstallFilter' },\n    { name: 'getMessages', call: 'shh_getMessages' }\n    ];\n};\n\n/// creates methods in a given object based on method description on input\n/// setups api calls for these methods\nvar setupMethods = function (obj, methods) {\n    methods.forEach(function (method) {\n        obj[method.name] = function () {\n            var args = Array.prototype.slice.call(arguments);\n            var call = typeof method.call === 'function' ? method.call(args) : method.call;\n            return web3.provider.send({\n                method: call,\n                params: args\n            });\n        };\n    });\n};\n\n/// creates properties in a given object based on properties description on input\n/// setups api calls for these properties\nvar setupProperties = function (obj, properties) {\n    properties.forEach(function (property) {\n        var proto = {};\n        proto.get = function () {\n            return web3.provider.send({\n                method: property.getter\n            });\n        };\n\n        if (property.setter) {\n            proto.set = function (val) {\n                return web3.provider.send({\n                    method: property.setter,\n                    params: [val]\n                });\n            };\n        }\n        Object.defineProperty(obj, property.name, proto);\n    });\n};\n\n/// setups web3 object, and it's in-browser executed methods\nvar web3 = {\n    _callbacks: {},\n    _events: {},\n    providers: {},\n\n    /// @returns ascii string representation of hex value prefixed with 0x\n    toAscii: utils.toAscii,\n\n    /// @returns hex representation (prefixed by 0x) of ascii string\n    fromAscii: utils.fromAscii,\n\n    /// @returns decimal representaton of hex value prefixed by 0x\n    toDecimal: function (val) {\n        // remove 0x and place 0, if it's required\n        val = val.length > 2 ? val.substring(2) : \"0\";\n        return (new BigNumber(val, 16).toString(10));\n    },\n\n    /// @returns hex representation (prefixed by 0x) of decimal value\n    fromDecimal: function (val) {\n        return \"0x\" + (new BigNumber(val).toString(16));\n    },\n\n    /// used to transform value/string to eth string\n    toEth: utils.toEth,\n\n    /// eth object prototype\n    eth: {\n        contractFromAbi: function (abi) {\n            return function(addr) {\n                // Default to address of Config. TODO: rremove prior to genesis.\n                addr = addr || '0xc6d9d2cd449a754c494264e1809c50e34d64562b';\n                var ret = web3.eth.contract(addr, abi);\n                ret.address = addr;\n                return ret;\n            };\n        },\n\n        /// @param filter may be a string, object or event\n        /// @param indexed is optional, this is an object with optional event indexed params\n        /// @param options is optional, this is an object with optional event options ('max'...)\n        watch: function (filter, indexed, options) {\n            if (filter._isEvent) {\n                return filter(indexed, options);\n            }\n            return new web3.filter(filter, ethWatch);\n        }\n    },\n\n    /// db object prototype\n    db: {},\n\n    /// shh object prototype\n    shh: {\n        \n        /// @param filter may be a string, object or event\n        watch: function (filter, indexed) {\n            return new web3.filter(filter, shhWatch);\n        }\n    },\n};\n\n/// setups all api methods\nsetupMethods(web3, web3Methods());\nsetupMethods(web3.eth, ethMethods());\nsetupProperties(web3.eth, ethProperties());\nsetupMethods(web3.db, dbMethods());\nsetupMethods(web3.shh, shhMethods());\n\nvar ethWatch = {\n    changed: 'eth_changed'\n};\n\nsetupMethods(ethWatch, ethWatchMethods());\n\nvar shhWatch = {\n    changed: 'shh_changed'\n};\n\nsetupMethods(shhWatch, shhWatchMethods());\n\nweb3.setProvider = function(provider) {\n    web3.provider.set(provider);\n};\n\nmodule.exports = web3;\n\n",
diff --git a/dist/ethereum.min.js b/dist/ethereum.min.js
index b26e1c84d1e5f441b18f5475d0a59985d21ea4d8..458b4d0f42c47187b56bd63562e81b7f1e1fca01 100644
--- a/dist/ethereum.min.js
+++ b/dist/ethereum.min.js
@@ -1 +1 @@
-require=function t(e,n,r){function i(a,u){if(!n[a]){if(!e[a]){var f="function"==typeof require&&require;if(!u&&f)return f(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=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"),r=t("./utils"),i=t("./types"),o=t("./const"),a=t("./formatters"),u=function(t){console.error("parser does not support type: "+t)},f=function(t){return"[]"===t.slice(-2)},s=function(t,e){return f(t)||"string"===t?a.formatInputInt(e.length):""},c=i.inputTypes(),l=function(t,e){{var n="";2*o.ETH_PADDING}return t.forEach(function(t,r){n+=s(t.type,e[r])}),t.forEach(function(r,i){for(var o=!1,a=0;a<c.length&&!o;a++)o=c[a].type(t[i].type,e[i]);o||u(t[i].type);var s=c[a-1].format,l="";l=f(t[i].type)?e[i].reduce(function(t,e){return t+s(e)},""):s(e[i]),n+=l}),n},p=function(t){return f(t)||"string"===t?2*o.ETH_PADDING:0},h=i.outputTypes(),m=function(t,e){e=e.slice(2);var n=[],r=2*o.ETH_PADDING,s=t.reduce(function(t,e){return t+p(e.type)},0),c=e.slice(0,s);return e=e.slice(s),t.forEach(function(o,s){for(var l=!1,p=0;p<h.length&&!l;p++)l=h[p].type(t[s].type);l||u(t[s].type);var m=h[p-1].format;if(f(t[s].type)){var d=a.formatOutputUInt(c.slice(0,r));c=c.slice(r);for(var g=[],v=0;d>v;v++)g.push(m(e.slice(0,r))),e=e.slice(r);n.push(g)}else i.prefixedType("string")(t[s].type)?(c=c.slice(r),n.push(m(e.slice(0,r))),e=e.slice(r)):(n.push(m(e.slice(0,r))),e=e.slice(r))}),n},d=function(t){var e={};return t.forEach(function(t){var n=r.extractDisplayName(t.name),i=r.extractTypeName(t.name),o=function(){var e=Array.prototype.slice.call(arguments);return l(t.inputs,e)};void 0===e[n]&&(e[n]=o),e[n][i]=o}),e},g=function(t){var e={};return t.forEach(function(t){var n=r.extractDisplayName(t.name),i=r.extractTypeName(t.name),o=function(e){return m(t.outputs,e)};void 0===e[n]&&(e[n]=o),e[n][i]=o}),e},v=function(t){return n.sha3(n.fromAscii(t)).slice(0,2+2*o.ETH_SIGNATURE_LENGTH)},y=function(t){return n.sha3(n.fromAscii(t))};e.exports={inputParser:d,outputParser:g,formatInput:l,formatOutput:m,signatureFromAscii:v,eventSignatureFromAscii:y}},{"./const":2,"./formatters":6,"./types":10,"./utils":11,"./web3":12}],2:[function(t,e){var n=["wei","Kwei","Mwei","Gwei","szabo","finney","ether","grand","Mether","Gether","Tether","Pether","Eether","Zether","Yether","Nether","Dether","Vether","Uether"];e.exports={ETH_PADDING:32,ETH_SIGNATURE_LENGTH:4,ETH_UNITS:n,ETH_BIGNUMBER_ROUNDING_MODE:{ROUNDING_MODE:BigNumber.ROUND_DOWN}}},{}],3:[function(t,e){var n=t("./web3"),r=t("./abi"),i=t("./utils"),o=t("./event"),a=function(t){n._currentContractAbi=t.abi,n._currentContractAddress=t.address,n._currentContractMethodName=t.method,n._currentContractMethodParams=t.params},u=function(t){t.call=function(e){return t._isTransact=!1,t._options=e,t},t.transact=function(e){return t._isTransact=!0,t._options=e,t},t._options={},["gas","gasPrice","value","from"].forEach(function(e){t[e]=function(n){return t._options[e]=n,t}})},f=function(t,e,o){var u=r.inputParser(e),f=r.outputParser(e);i.filterFunctions(e).forEach(function(s){var c=i.extractDisplayName(s.name),l=i.extractTypeName(s.name),p=function(){var i=Array.prototype.slice.call(arguments),p=r.signatureFromAscii(s.name),h=u[c][l].apply(null,i),m=t._options||{};m.to=o,m.data=p+h;var d=t._isTransact===!0||t._isTransact!==!1&&!s.constant,g=m.collapse!==!1;if(t._options={},t._isTransact=null,d)return a({abi:e,address:o,method:s.name,params:i}),void n.eth.transact(m);var v=n.eth.call(m),y=f[c][l](v);return g&&(1===y.length?y=y[0]:0===y.length&&(y=null)),y};void 0===t[c]&&(t[c]=p),t[c][l]=p})},s=function(t,e,n){t.address=n,t._onWatchEventResult=function(t){var n=event.getMatchingEvent(i.filterEvents(e)),r=o.outputParser(n);return r(t)},Object.defineProperty(t,"topic",{get:function(){return i.filterEvents(e).map(function(t){return r.eventSignatureFromAscii(t.name)})}})},c=function(t,e,a){i.filterEvents(e).forEach(function(e){var u=function(){var t=Array.prototype.slice.call(arguments),i=r.eventSignatureFromAscii(e.name),u=o.inputParser(a,i,e),f=u.apply(null,t);return f._onWatchEventResult=function(t){var n=o.outputParser(e);return n(t)},n.eth.watch(f)};u._isEvent=!0;var f=i.extractDisplayName(e.name),s=i.extractTypeName(e.name);void 0===t[f]&&(t[f]=u),t[f][s]=u})},l=function(t,e){e.forEach(function(t){if(-1===t.name.indexOf("(")){var e=t.name,n=t.inputs.map(function(t){return t.type}).join();t.name=e+"("+n+")"}});var n={};return u(n),f(n,e,t),s(n,e,t),c(n,e,t),n};e.exports=l},{"./abi":1,"./event":4,"./utils":11,"./web3":12}],4:[function(t,e){var n=t("./abi"),r=t("./utils"),i=function(t,e){return t.filter(function(t){return t.indexed===e})},o=function(t,e){var n=r.findIndex(t,function(t){return t.name===e});return-1===n?void console.error("indexed param with name "+e+" not found"):t[n]},a=function(t,e){return Object.keys(e).map(function(r){var a=[o(i(t.inputs,!0),r)],u=e[r];return u instanceof Array?u.map(function(t){return n.formatInput(a,[t])}):n.formatInput(a,[u])})},u=function(t,e,n){return function(r,i){var o=i||{};return o.address=t,o.topic=[],o.topic.push(e),r&&(o.topic=o.topic.concat(a(n,r))),o}},f=function(t,e,n){e.slice(),n.slice();return t.reduce(function(t,r){var i;return i=r.indexed?e.splice(0,1)[0]:n.splice(0,1)[0],t[r.name]=i,t},{})},s=function(t){return function(e){var o={event:r.extractDisplayName(t.name),number:e.number,args:{}};if(!e.topic)return o;var a=i(t.inputs,!0),u="0x"+e.topic.slice(1,e.topic.length).map(function(t){return t.slice(2)}).join(""),s=n.formatOutput(a,u),c=i(t.inputs,!1),l=n.formatOutput(c,e.data);return o.args=f(t.inputs,s,l),o}},c=function(t,e){for(var r=0;r<t.length;r++){var i=n.eventSignatureFromAscii(t[r].name);if(i===e.topic[0])return t[r]}return void 0};e.exports={inputParser:u,outputParser:s,getMatchingEvent:c}},{"./abi":1,"./utils":11}],5:[function(t,e){var n=t("./web3"),r=function(t,e){"string"!=typeof t&&(t.topics&&console.warn('"topics" is deprecated, use "topic" instead'),this._onWatchResult=t._onWatchEventResult,t={to:t.to,topic:t.topic,earliest:t.earliest,latest:t.latest,max:t.max,skip:t.skip,address:t.address}),this.impl=e,this.callbacks=[],this.id=e.newFilter(t),n.provider.startPolling({method:e.changed,params:[this.id]},this.id,this.trigger.bind(this))};r.prototype.arrived=function(t){this.changed(t)},r.prototype.happened=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++)for(var n=0;n<t.length;n++){var r=this._onWatchResult?this._onWatchResult(t[n]):t[n];this.callbacks[e].call(this,r)}},r.prototype.uninstall=function(){this.impl.uninstallFilter(this.id),n.provider.stopPolling(this.id)},r.prototype.messages=function(){return this.impl.getMessages(this.id)},r.prototype.logs=function(){return this.messages()},e.exports=r},{"./web3":12}],6:[function(t,e){var n=t("./utils"),r=t("./const"),i=function(t,e,n){return new Array(e-t.length+1).join(n?n:"0")+t},o=function(t){var e=2*r.ETH_PADDING;return t instanceof BigNumber||"number"==typeof t?("number"==typeof t&&(t=new BigNumber(t)),BigNumber.config(r.ETH_BIGNUMBER_ROUNDING_MODE),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?o(new BigNumber(t)):(+t).toString(16),i(t,e)},a=function(t){return n.fromAscii(t,r.ETH_PADDING).substr(2)},u=function(t){return"000000000000000000000000000000000000000000000000000000000000000"+(t?"1":"0")},f=function(t){return o(new BigNumber(t).times(new BigNumber(2).pow(128)))},s=function(t){return"1"===new BigNumber(t.substr(0,1),16).toString(2).substr(0,1)},c=function(t){return t=t||"0",s(t)?new BigNumber(t,16).minus(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16)).minus(1):new BigNumber(t,16)},l=function(t){return t=t||"0",new BigNumber(t,16)},p=function(t){return c(t).dividedBy(new BigNumber(2).pow(128))},h=function(t){return l(t).dividedBy(new BigNumber(2).pow(128))},m=function(t){return"0x"+t},d=function(t){return"0000000000000000000000000000000000000000000000000000000000000001"===t?!0:!1},g=function(t){return n.toAscii(t)},v=function(t){return"0x"+t.slice(t.length-40,t.length)};e.exports={formatInputInt:o,formatInputString:a,formatInputBool:u,formatInputReal:f,formatOutputInt:c,formatOutputUInt:l,formatOutputReal:p,formatOutputUReal:h,formatOutputHash:m,formatOutputBool:d,formatOutputString:g,formatOutputAddress:v}},{"./const":2,"./utils":11}],7:[function(t,e){var n=function(t){this.handlers=[],this.host=t||"http://localhost:8080"};n.prototype.send=function(t){var e=new XMLHttpRequest;return e.open("POST",this.host,!1),e.send(JSON.stringify(t)),e.responseText},e.exports=n},{}],8:[function(t,e){var n=(t("./web3"),function(){this.polls=[],this.provider=void 0,this.id=1;var t=this,e=function(){t.provider&&t.polls.forEach(function(e){var n=t.send(e.data);n instanceof Array&&0!==n.length&&e.callback(n)}),setTimeout(e,1e3)};e()});n.prototype.send=function(t){if(t.jsonrpc="2.0",t.params=t.params||[],t.id=this.id++,void 0===this.provider)return console.error("provider is not set"),null;var e=this.provider.send(t);return e=JSON.parse(e),e.error?(console.log(e.error),null):e.result},n.prototype.set=function(t){this.provider=t},n.prototype.startPolling=function(t,e,n){this.polls.push({data:t,id:e,callback:n})},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":12}],9:[function(t,e){var n=function(){};n.prototype.send=function(t){return navigator.qt.callMethod(JSON.stringify(t))},e.exports=n},{}],10:[function(t,e){var n=t("./formatters"),r=function(t){return function(e){return 0===e.indexOf(t)}},i=function(t){return function(e){return t===e}},o=function(){return[{type:r("uint"),format:n.formatInputInt},{type:r("int"),format:n.formatInputInt},{type:r("hash"),format:n.formatInputInt},{type:r("string"),format:n.formatInputString},{type:r("real"),format:n.formatInputReal},{type:r("ureal"),format:n.formatInputReal},{type:i("address"),format:n.formatInputInt},{type:i("bool"),format:n.formatInputBool}]},a=function(){return[{type:r("uint"),format:n.formatOutputUInt},{type:r("int"),format:n.formatOutputInt},{type:r("hash"),format:n.formatOutputHash},{type:r("string"),format:n.formatOutputString},{type:r("real"),format:n.formatOutputReal},{type:r("ureal"),format:n.formatOutputUReal},{type:i("address"),format:n.formatOutputAddress},{type:i("bool"),format:n.formatOutputBool}]};e.exports={prefixedType:r,namedType:i,inputTypes:o,outputTypes:a}},{"./formatters":6}],11:[function(t,e){var n=t("./const"),r=function(t,e){for(var n=!1,r=0;r<t.length&&!n;r++)n=e(t[r]);return n?r-1:-1},i=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},o=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},a=function(t,e){e=void 0===e?0:e;for(var n=o(t);n.length<2*e;)n+="00";return"0x"+n},u=function(t){var e=t.indexOf("(");return-1!==e?t.substr(0,e):t},f=function(t){var e=t.indexOf("(");return-1!==e?t.substr(e+1,t.length-1-(e+1)).replace(" ",""):""},s=function(t){return t.filter(function(t){return"function"===t.type})},c=function(t){return t.filter(function(t){return"event"===t.type})},l=function(t){for(var e="string"==typeof t?0===t.indexOf("0x")?parseInt(t.substr(2),16):parseInt(t):t,r=0,i=n.ETH_UNITS;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 u=o;if(o=o.replace(/(\d)(\d\d\d[\.\,])/,a),u===o)break}return o+" "+i[r]};e.exports={findIndex:r,toAscii:i,fromAscii:a,extractDisplayName:u,extractTypeName:f,filterFunctions:s,filterEvents:c,toEth:l}},{"./const":2}],12:[function(t,e){var n=t("./utils"),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:"flush",call:"eth_flush"},{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:"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 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:"getMessages",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({method:n,params:t})}})},l=function(t,e){e.forEach(function(e){var n={};n.get=function(){return p.provider.send({method:e.getter})},e.setter&&(n.set=function(t){return p.provider.send({method:e.setter,params:[t]})}),Object.defineProperty(t,e.name,n)})},p={_callbacks:{},_events:{},providers:{},toAscii:n.toAscii,fromAscii:n.fromAscii,toDecimal:function(t){return t=t.length>2?t.substring(2):"0",new BigNumber(t,16).toString(10)},fromDecimal:function(t){return"0x"+new BigNumber(t).toString(16)},toEth:n.toEth,eth:{contractFromAbi:function(t){return function(e){e=e||"0xc6d9d2cd449a754c494264e1809c50e34d64562b";var n=p.eth.contract(e,t);return n.address=e,n}},watch:function(t,e,n){return t._isEvent?t(e,n):new p.filter(t,h)}},db:{},shh:{watch:function(t){return new p.filter(t,m)}}};c(p,r()),c(p.eth,i()),l(p.eth,o()),c(p.db,a()),c(p.shh,u());var h={changed:"eth_changed"};c(h,f());var m={changed:"shh_changed"};c(m,s()),p.setProvider=function(t){p.provider.set(t)},e.exports=p},{"./utils":11}],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":3,"./lib/filter":5,"./lib/httpsync":7,"./lib/providermanager":8,"./lib/qtsync":9,"./lib/web3":12}]},{},["web3"]);
\ No newline at end of file
+require=function t(e,n,r){function i(a,u){if(!n[a]){if(!e[a]){var s="function"==typeof require&&require;if(!u&&s)return s(a,!0);if(o)return o(a,!0);var f=new Error("Cannot find module '"+a+"'");throw f.code="MODULE_NOT_FOUND",f}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"),r=t("./utils"),i=t("./types"),o=t("./const"),a=t("./formatters"),u=function(t){console.error("parser does not support type: "+t)},s=function(t){return"[]"===t.slice(-2)},f=function(t,e){return s(t)||"string"===t?a.formatInputInt(e.length):""},c=i.inputTypes(),l=function(t,e){{var n="";2*o.ETH_PADDING}return t.forEach(function(t,r){n+=f(t.type,e[r])}),t.forEach(function(r,i){for(var o=!1,a=0;a<c.length&&!o;a++)o=c[a].type(t[i].type,e[i]);o||u(t[i].type);var f=c[a-1].format,l="";l=s(t[i].type)?e[i].reduce(function(t,e){return t+f(e)},""):f(e[i]),n+=l}),n},p=function(t){return s(t)||"string"===t?2*o.ETH_PADDING:0},m=i.outputTypes(),h=function(t,e){e=e.slice(2);var n=[],r=2*o.ETH_PADDING,f=t.reduce(function(t,e){return t+p(e.type)},0),c=e.slice(0,f);return e=e.slice(f),t.forEach(function(o,f){for(var l=!1,p=0;p<m.length&&!l;p++)l=m[p].type(t[f].type);l||u(t[f].type);var h=m[p-1].format;if(s(t[f].type)){var d=a.formatOutputUInt(c.slice(0,r));c=c.slice(r);for(var g=[],v=0;d>v;v++)g.push(h(e.slice(0,r))),e=e.slice(r);n.push(g)}else i.prefixedType("string")(t[f].type)?(c=c.slice(r),n.push(h(e.slice(0,r))),e=e.slice(r)):(n.push(h(e.slice(0,r))),e=e.slice(r))}),n},d=function(t){var e={};return t.forEach(function(t){var n=r.extractDisplayName(t.name),i=r.extractTypeName(t.name),o=function(){var e=Array.prototype.slice.call(arguments);return l(t.inputs,e)};void 0===e[n]&&(e[n]=o),e[n][i]=o}),e},g=function(t){var e={};return t.forEach(function(t){var n=r.extractDisplayName(t.name),i=r.extractTypeName(t.name),o=function(e){return h(t.outputs,e)};void 0===e[n]&&(e[n]=o),e[n][i]=o}),e},v=function(t){return n.sha3(n.fromAscii(t)).slice(0,2+2*o.ETH_SIGNATURE_LENGTH)},y=function(t){return n.sha3(n.fromAscii(t))};e.exports={inputParser:d,outputParser:g,formatInput:l,formatOutput:h,signatureFromAscii:v,eventSignatureFromAscii:y}},{"./const":2,"./formatters":6,"./types":11,"./utils":12,"./web3":13}],2:[function(t,e){var n=["wei","Kwei","Mwei","Gwei","szabo","finney","ether","grand","Mether","Gether","Tether","Pether","Eether","Zether","Yether","Nether","Dether","Vether","Uether"];e.exports={ETH_PADDING:32,ETH_SIGNATURE_LENGTH:4,ETH_UNITS:n,ETH_BIGNUMBER_ROUNDING_MODE:{ROUNDING_MODE:BigNumber.ROUND_DOWN}}},{}],3:[function(t,e){var n=t("./web3"),r=t("./abi"),i=t("./utils"),o=t("./event"),a=function(t){n._currentContractAbi=t.abi,n._currentContractAddress=t.address,n._currentContractMethodName=t.method,n._currentContractMethodParams=t.params},u=function(t){t.call=function(e){return t._isTransact=!1,t._options=e,t},t.transact=function(e){return t._isTransact=!0,t._options=e,t},t._options={},["gas","gasPrice","value","from"].forEach(function(e){t[e]=function(n){return t._options[e]=n,t}})},s=function(t,e,o){var u=r.inputParser(e),s=r.outputParser(e);i.filterFunctions(e).forEach(function(f){var c=i.extractDisplayName(f.name),l=i.extractTypeName(f.name),p=function(){var i=Array.prototype.slice.call(arguments),p=r.signatureFromAscii(f.name),m=u[c][l].apply(null,i),h=t._options||{};h.to=o,h.data=p+m;var d=t._isTransact===!0||t._isTransact!==!1&&!f.constant,g=h.collapse!==!1;if(t._options={},t._isTransact=null,d)return a({abi:e,address:o,method:f.name,params:i}),void n.eth.transact(h);var v=n.eth.call(h),y=s[c][l](v);return g&&(1===y.length?y=y[0]:0===y.length&&(y=null)),y};void 0===t[c]&&(t[c]=p),t[c][l]=p})},f=function(t,e,n){t.address=n,t._onWatchEventResult=function(t){var n=event.getMatchingEvent(i.filterEvents(e)),r=o.outputParser(n);return r(t)},Object.defineProperty(t,"topic",{get:function(){return i.filterEvents(e).map(function(t){return r.eventSignatureFromAscii(t.name)})}})},c=function(t,e,a){i.filterEvents(e).forEach(function(e){var u=function(){var t=Array.prototype.slice.call(arguments),i=r.eventSignatureFromAscii(e.name),u=o.inputParser(a,i,e),s=u.apply(null,t);return s._onWatchEventResult=function(t){var n=o.outputParser(e);return n(t)},n.eth.watch(s)};u._isEvent=!0;var s=i.extractDisplayName(e.name),f=i.extractTypeName(e.name);void 0===t[s]&&(t[s]=u),t[s][f]=u})},l=function(t,e){e.forEach(function(t){if(-1===t.name.indexOf("(")){var e=t.name,n=t.inputs.map(function(t){return t.type}).join();t.name=e+"("+n+")"}});var n={};return u(n),s(n,e,t),f(n,e,t),c(n,e,t),n};e.exports=l},{"./abi":1,"./event":4,"./utils":12,"./web3":13}],4:[function(t,e){var n=t("./abi"),r=t("./utils"),i=function(t,e){return t.filter(function(t){return t.indexed===e})},o=function(t,e){var n=r.findIndex(t,function(t){return t.name===e});return-1===n?void console.error("indexed param with name "+e+" not found"):t[n]},a=function(t,e){return Object.keys(e).map(function(r){var a=[o(i(t.inputs,!0),r)],u=e[r];return u instanceof Array?u.map(function(t){return n.formatInput(a,[t])}):n.formatInput(a,[u])})},u=function(t,e,n){return function(r,i){var o=i||{};return o.address=t,o.topic=[],o.topic.push(e),r&&(o.topic=o.topic.concat(a(n,r))),o}},s=function(t,e,n){e.slice(),n.slice();return t.reduce(function(t,r){var i;return i=r.indexed?e.splice(0,1)[0]:n.splice(0,1)[0],t[r.name]=i,t},{})},f=function(t){return function(e){var o={event:r.extractDisplayName(t.name),number:e.number,args:{}};if(!e.topic)return o;var a=i(t.inputs,!0),u="0x"+e.topic.slice(1,e.topic.length).map(function(t){return t.slice(2)}).join(""),f=n.formatOutput(a,u),c=i(t.inputs,!1),l=n.formatOutput(c,e.data);return o.args=s(t.inputs,f,l),o}},c=function(t,e){for(var r=0;r<t.length;r++){var i=n.eventSignatureFromAscii(t[r].name);if(i===e.topic[0])return t[r]}return void 0};e.exports={inputParser:u,outputParser:f,getMatchingEvent:c}},{"./abi":1,"./utils":12}],5:[function(t,e){var n=t("./web3"),r=function(t,e){"string"!=typeof t&&(t.topics&&console.warn('"topics" is deprecated, use "topic" instead'),this._onWatchResult=t._onWatchEventResult,t={to:t.to,topic:t.topic,earliest:t.earliest,latest:t.latest,max:t.max,skip:t.skip,address:t.address}),this.impl=e,this.callbacks=[],this.id=e.newFilter(t),n.provider.startPolling({method:e.changed,params:[this.id]},this.id,this.trigger.bind(this))};r.prototype.arrived=function(t){this.changed(t)},r.prototype.happened=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++)for(var n=0;n<t.length;n++){var r=this._onWatchResult?this._onWatchResult(t[n]):t[n];this.callbacks[e].call(this,r)}},r.prototype.uninstall=function(){this.impl.uninstallFilter(this.id),n.provider.stopPolling(this.id)},r.prototype.messages=function(){return this.impl.getMessages(this.id)},r.prototype.logs=function(){return this.messages()},e.exports=r},{"./web3":13}],6:[function(t,e){var n=t("./utils"),r=t("./const"),i=function(t,e,n){return new Array(e-t.length+1).join(n?n:"0")+t},o=function(t){var e=2*r.ETH_PADDING;return t instanceof BigNumber||"number"==typeof t?("number"==typeof t&&(t=new BigNumber(t)),BigNumber.config(r.ETH_BIGNUMBER_ROUNDING_MODE),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?o(new BigNumber(t)):(+t).toString(16),i(t,e)},a=function(t){return n.fromAscii(t,r.ETH_PADDING).substr(2)},u=function(t){return"000000000000000000000000000000000000000000000000000000000000000"+(t?"1":"0")},s=function(t){return o(new BigNumber(t).times(new BigNumber(2).pow(128)))},f=function(t){return"1"===new BigNumber(t.substr(0,1),16).toString(2).substr(0,1)},c=function(t){return t=t||"0",f(t)?new BigNumber(t,16).minus(new BigNumber("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",16)).minus(1):new BigNumber(t,16)},l=function(t){return t=t||"0",new BigNumber(t,16)},p=function(t){return c(t).dividedBy(new BigNumber(2).pow(128))},m=function(t){return l(t).dividedBy(new BigNumber(2).pow(128))},h=function(t){return"0x"+t},d=function(t){return"0000000000000000000000000000000000000000000000000000000000000001"===t?!0:!1},g=function(t){return n.toAscii(t)},v=function(t){return"0x"+t.slice(t.length-40,t.length)};e.exports={formatInputInt:o,formatInputString:a,formatInputBool:u,formatInputReal:s,formatOutputInt:c,formatOutputUInt:l,formatOutputReal:p,formatOutputUReal:m,formatOutputHash:h,formatOutputBool:d,formatOutputString:g,formatOutputAddress:v}},{"./const":2,"./utils":12}],7:[function(t,e){var n=function(t){this.handlers=[],this.host=t||"http://localhost:8080"};n.prototype.send=function(t){var e=new XMLHttpRequest;e.open("POST",this.host,!1),e.send(JSON.stringify(t));var n=e.responseText;return JSON.parse(n)},e.exports=n},{}],8:[function(t,e){var n=1,r=function(t,e){return t||console.error("jsonrpc method should be specified!"),{jsonrpc:"2.0",method:t,params:e||[],id:n++}},i=function(t){return t&&!t.error},o=function(t){return t.map(function(t){return r(t.method,t.params)})};e.exports={toPayload:r,isValidResponse:i,toBatchPayload:o}},{}],9:[function(t,e){var n=(t("./web3"),t("./jsonrpc")),r=function(){this.polls=[],this.provider=void 0;var t=this,e=function(){if(t.provider){var r=t.polls.map(function(t){return t.data}),i=n.toBatchPayload(r),o=t.provider.send(i);t.polls.forEach(function(t,e){var r=o[e];n.isValidResponse(r)&&(r=r.result,r instanceof Array&&0!==r.length&&t.callback(r))})}setTimeout(e,1e3)};e()};r.prototype.send=function(t){var e=n.toPayload(t.method,t.params);if(void 0===this.provider)return console.error("provider is not set"),null;var r=this.provider.send(e);return n.isValidResponse(r)?r.result:(console.log(r.error),null)},r.prototype.set=function(t){this.provider=t},r.prototype.startPolling=function(t,e,n){this.polls.push({data:t,id:e,callback:n})},r.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=r},{"./jsonrpc":8,"./web3":13}],10:[function(t,e){var n=function(){};n.prototype.send=function(t){var e=navigator.qt.callMethod(JSON.stringify(t));return JSON.parse(e)},e.exports=n},{}],11:[function(t,e){var n=t("./formatters"),r=function(t){return function(e){return 0===e.indexOf(t)}},i=function(t){return function(e){return t===e}},o=function(){return[{type:r("uint"),format:n.formatInputInt},{type:r("int"),format:n.formatInputInt},{type:r("hash"),format:n.formatInputInt},{type:r("string"),format:n.formatInputString},{type:r("real"),format:n.formatInputReal},{type:r("ureal"),format:n.formatInputReal},{type:i("address"),format:n.formatInputInt},{type:i("bool"),format:n.formatInputBool}]},a=function(){return[{type:r("uint"),format:n.formatOutputUInt},{type:r("int"),format:n.formatOutputInt},{type:r("hash"),format:n.formatOutputHash},{type:r("string"),format:n.formatOutputString},{type:r("real"),format:n.formatOutputReal},{type:r("ureal"),format:n.formatOutputUReal},{type:i("address"),format:n.formatOutputAddress},{type:i("bool"),format:n.formatOutputBool}]};e.exports={prefixedType:r,namedType:i,inputTypes:o,outputTypes:a}},{"./formatters":6}],12:[function(t,e){var n=t("./const"),r=function(t,e){for(var n=!1,r=0;r<t.length&&!n;r++)n=e(t[r]);return n?r-1:-1},i=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},o=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},a=function(t,e){e=void 0===e?0:e;for(var n=o(t);n.length<2*e;)n+="00";return"0x"+n},u=function(t){var e=t.indexOf("(");return-1!==e?t.substr(0,e):t},s=function(t){var e=t.indexOf("(");return-1!==e?t.substr(e+1,t.length-1-(e+1)).replace(" ",""):""},f=function(t){return t.filter(function(t){return"function"===t.type})},c=function(t){return t.filter(function(t){return"event"===t.type})},l=function(t){for(var e="string"==typeof t?0===t.indexOf("0x")?parseInt(t.substr(2),16):parseInt(t):t,r=0,i=n.ETH_UNITS;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 u=o;if(o=o.replace(/(\d)(\d\d\d[\.\,])/,a),u===o)break}return o+" "+i[r]};e.exports={findIndex:r,toAscii:i,fromAscii:a,extractDisplayName:u,extractTypeName:s,filterFunctions:f,filterEvents:c,toEth:l}},{"./const":2}],13:[function(t,e){var n=t("./utils"),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:"flush",call:"eth_flush"},{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:"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"}]},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"}]},f=function(){return[{name:"newFilter",call:"shh_newFilter"},{name:"uninstallFilter",call:"shh_uninstallFilter"},{name:"getMessages",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({method:n,params:t})}})},l=function(t,e){e.forEach(function(e){var n={};n.get=function(){return p.provider.send({method:e.getter})},e.setter&&(n.set=function(t){return p.provider.send({method:e.setter,params:[t]})}),Object.defineProperty(t,e.name,n)})},p={_callbacks:{},_events:{},providers:{},toAscii:n.toAscii,fromAscii:n.fromAscii,toDecimal:function(t){return t=t.length>2?t.substring(2):"0",new BigNumber(t,16).toString(10)},fromDecimal:function(t){return"0x"+new BigNumber(t).toString(16)},toEth:n.toEth,eth:{contractFromAbi:function(t){return function(e){e=e||"0xc6d9d2cd449a754c494264e1809c50e34d64562b";var n=p.eth.contract(e,t);return n.address=e,n}},watch:function(t,e,n){return t._isEvent?t(e,n):new p.filter(t,m)}},db:{},shh:{watch:function(t){return new p.filter(t,h)}}};c(p,r()),c(p.eth,i()),l(p.eth,o()),c(p.db,a()),c(p.shh,u());var m={changed:"eth_changed"};c(m,s());var h={changed:"shh_changed"};c(h,f()),p.setProvider=function(t){p.provider.set(t)},e.exports=p},{"./utils":12}],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":3,"./lib/filter":5,"./lib/httpsync":7,"./lib/providermanager":9,"./lib/qtsync":10,"./lib/web3":13}]},{},["web3"]);
\ No newline at end of file
diff --git a/lib/httpsync.js b/lib/httpsync.js
index 478779c4b0929a01ec196f26ed7a088d27906d51..06e410ca8feea75db17f25620d15f3743b6763d5 100644
--- a/lib/httpsync.js
+++ b/lib/httpsync.js
@@ -38,7 +38,8 @@ HttpSyncProvider.prototype.send = function (payload) {
     request.send(JSON.stringify(payload));
     
     // check request.status
-    return request.responseText;
+    var result = request.responseText;
+    return JSON.parse(result);
 };
 
 module.exports = HttpSyncProvider;
diff --git a/lib/jsonrpc.js b/lib/jsonrpc.js
new file mode 100644
index 0000000000000000000000000000000000000000..0036d0abf59e8294b6511d1b7ba7cb4591531008
--- /dev/null
+++ b/lib/jsonrpc.js
@@ -0,0 +1,61 @@
+/*
+    This file is part of ethereum.js.
+
+    ethereum.js is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    ethereum.js is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file jsonrpc.js
+ * @authors:
+ *   Marek Kotewicz <marek@ethdev.com>
+ * @date 2015
+ */
+
+var messageId = 1;
+
+/// Should be called to valid json create payload object
+/// @param method of jsonrpc call, required
+/// @param params, an array of method params, optional
+/// @returns valid jsonrpc payload object
+var toPayload = function (method, params) {
+    if (!method)
+        console.error('jsonrpc method should be specified!');
+
+    return {
+        jsonrpc: '2.0',
+        method: method,
+        params: params || [],
+        id: messageId++
+    }; 
+};
+
+/// Should be called to check if jsonrpc response is valid
+/// @returns true if response doesn't have error field
+var isValidResponse = function (response) {
+    return response && !response.error;
+};
+
+/// Should be called to create batch payload object
+/// @param messages, an array of objects with method (required) and params (optional) fields
+var toBatchPayload = function (messages) {
+    return messages.map(function (message) {
+        return toPayload(message.method, message.params);
+    }); 
+};
+
+module.exports = {
+    toPayload: toPayload,
+    isValidResponse: isValidResponse,
+    toBatchPayload: toBatchPayload
+};
+
+
diff --git a/lib/providermanager.js b/lib/providermanager.js
index 38c0f6c464372488ac71bfc870720638a3369f98..ce208917db7c360c104fa8c7fe28a0d84d003a2f 100644
--- a/lib/providermanager.js
+++ b/lib/providermanager.js
@@ -23,7 +23,9 @@
  * @date 2014
  */
 
-var web3 = require('./web3'); // jshint ignore:line
+var web3 = require('./web3'); 
+var jsonrpc = require('./jsonrpc');
+
 
 /**
  * Provider manager object prototype
@@ -37,21 +39,34 @@ var web3 = require('./web3'); // jshint ignore:line
 var ProviderManager = function() {
     this.polls = [];
     this.provider = undefined;
-    this.id = 1;
 
     var self = this;
     var poll = function () {
         if (self.provider) {
-            self.polls.forEach(function (data) {
-                var result = self.send(data.data);
-            
+            var pollsBatch = self.polls.map(function (data) {
+                return data.data;
+            });
+
+            var payload = jsonrpc.toBatchPayload(pollsBatch);
+            var results = self.provider.send(payload);
+
+            self.polls.forEach(function (data, index) {
+                var result = results[index];
+                
+                if (!jsonrpc.isValidResponse(result)) {
+                    return;
+                }
+
+                result = result.result;
                 // dont call the callback if result is not an array, or empty one
                 if (!(result instanceof Array) || result.length === 0) {
                     return;
                 }
 
                 data.callback(result);
+
             });
+
         }
         setTimeout(poll, 1000);
     };
@@ -61,21 +76,16 @@ var ProviderManager = function() {
 /// sends outgoing requests
 /// @params data - an object with at least 'method' property
 ProviderManager.prototype.send = function(data) {
-
-    data.jsonrpc = '2.0';
-    data.params = data.params || [];
-    data.id = this.id++;
+    var payload = jsonrpc.toPayload(data.method, data.params);
 
     if (this.provider === undefined) {
         console.error('provider is not set');
         return null; 
     }
 
-    //TODO: handle error here? 
-    var result = this.provider.send(data);
-    result = JSON.parse(result);
+    var result = this.provider.send(payload);
 
-    if (result.error) {
+    if (!jsonrpc.isValidResponse(result)) {
         console.log(result.error);
         return null;
     }
diff --git a/lib/qtsync.js b/lib/qtsync.js
index a287a7172647c9e65e62a86e3fcffe1b273cf01b..75dcb43abefb8e790bfe50bac0b70db77fbdba4e 100644
--- a/lib/qtsync.js
+++ b/lib/qtsync.js
@@ -25,7 +25,8 @@ var QtSyncProvider = function () {
 };
 
 QtSyncProvider.prototype.send = function (payload) {
-    return navigator.qt.callMethod(JSON.stringify(payload));
+    var result = navigator.qt.callMethod(JSON.stringify(payload));
+    return JSON.parse(result);
 };
 
 module.exports = QtSyncProvider;