This is the Ethereum compatible JavaScript API using `Promise`s
which implements the [Generic JSON RPC](https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC) spec. It's available on npm as a node module and also for bower and component as an embeddable js
"/*\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 web3 = require('./web3'); // jshint ignore:line\n*/}\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\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\nvar findMethodIndex = function (json, methodName) {\n return findIndex(json, function (method) {\n return method.name === methodName;\n });\n};\n\nvar padLeft = function (string, chars) {\n return new Array(chars - string.length + 1).join(\"0\") + string;\n};\n\nvar calcBitPadding = function (type, expected) {\n var value = type.slice(expected.length);\n if (value === \"\") {\n return 32;\n }\n return parseInt(value) / 8;\n};\n\nvar calcBytePadding = function (type, expected) {\n var value = type.slice(expected.length);\n if (value === \"\") {\n return 32;\n }\n return parseInt(value);\n};\n\nvar calcRealPadding = function (type, expected) {\n var value = type.slice(expected.length);\n if (value === \"\") {\n return 32;\n }\n var sizes = value.split('x');\n for (var padding = 0, i = 0; i < sizes; i++) {\n padding += (sizes[i] / 8);\n }\n return padding;\n};\n\nvar setupInputTypes = function () {\n \n var prefixedType = function (prefix, calcPadding) {\n return function (type, value) {\n var expected = prefix;\n if (type.indexOf(expected) !== 0) {\n return false;\n }\n\n var padding = calcPadding(type, expected);\n if (typeof value === \"number\")\n value = value.toString(16);\n else if (typeof value === \"string\")\n value = web3.toHex(value); \n else if (value.indexOf('0x') === 0)\n value = value.substr(2);\n else\n value = (+value).toString(16);\n return padLeft(value, padding * 2);\n };\n };\n\n var namedType = function (name, padding, formatter) {\n return function (type, value) {\n if (type !== name) {\n return false;\n }\n\n return padLeft(formatter ? formatter(value) : value, padding * 2);\n };\n };\n\n var formatBool = function (value) {\n return value ? '0x1' : '0x0';\n };\n\n return [\n prefixedType('uint', calcBitPadding),\n prefixedType('int', calcBitPadding),\n prefixedType('hash', calcBitPadding),\n prefixedType('string', calcBytePadding),\n prefixedType('real', calcRealPadding),\n prefixedType('ureal', calcRealPadding),\n namedType('address', 20),\n namedType('bool', 1, formatBool),\n ];\n};\n\nvar inputTypes = setupInputTypes();\n\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 bytes = \"0x\" + padLeft(index.toString(16), 2);\n var method = json[index];\n\n for (var i = 0; i < method.inputs.length; i++) {\n var found = false;\n for (var j = 0; j < inputTypes.length && !found; j++) {\n found = inputTypes[j](method.inputs[i].type, params[i]);\n }\n if (!found) {\n console.error('unsupported json type: ' + method.inputs[i].type);\n }\n bytes += found;\n }\n return bytes;\n};\n\nvar setupOutputTypes = function () {\n\n var prefixedType = function (prefix, calcPadding) {\n return function (type) {\n var expected = prefix;\n if (type.indexOf(expected) !== 0) {\n return -1;\n }\n\n var padding = calcPadding(type, expected);\n return padding * 2;\n };\n };\n\n var namedType = function (name, padding) {\n return function (type) {\n return name === type ? padding * 2 : -1;\n };\n };\n\n var formatInt = function (value) {\n return value.length <= 8 ? +parseInt(value, 16) : hexToDec(value);\n };\n\n var formatHash = function (value) {\n return \"0x\" + value;\n };\n\n var formatBool = function (value) {\n return value === '1' ? true : false;\n };\n\n var formatString = function (value) {\n return web3.toAscii(value);\n };\n\n return [\n { padding: prefixedType('uint', calcBitPadding), format: formatInt },\n { padding: prefixedType('int', calcBitPadding), format: formatInt },\n { padding: prefixedType('hash', calcBitPadding), format: formatHash },\n { padding: prefixedType('string', calcBytePadding), format: formatString },\n { padding: prefixedType('real', calcRealPadding), format: formatInt },\n { padding: prefixedType('ureal', calcRealPadding), format: formatInt },\n { padding: namedType('address', 20) },\n { padding: namedType('bool', 1), format: formatBool }\n ];\n};\n\nvar outputTypes = setupOutputTypes();\n\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 for (var i = 0; i < method.outputs.length; i++) {\n var padding = -1;\n for (var j = 0; j < outputTypes.length && padding === -1; j++) {\n padding = outputTypes[j].padding(method.outputs[i].type);\n }\n\n if (padding === -1) {\n // not found output parsing\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\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\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\nmodule.exports = {\n inputParser: inputParser,\n outputParser: outputParser\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\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\nAutoProvider.prototype.send = function (payload) {\n if (this.provider) {\n this.provider.send(payload);\n return;\n }\n this.sendQueue.push(payload);\n};\n\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\n// TODO: is these line is supposed to be here? \nif (\"build\" !== 'build') {/*\n var web3 = require('./web3'); // jshint ignore:line\n*/}\n\nvar abi = require('./abi');\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 extra.data = parsed;\n return web3.eth.call(extra).then(onSuccess);\n },\n transact: function (extra) {\n extra = extra || {};\n extra.to = address;\n extra.data = parsed;\n return web3.eth.transact(extra).then(onSuccess);\n }\n };\n };\n });\n\n return contract;\n};\n\nmodule.exports = contract;\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 httprpc.js\n * @authors:\n * Marek Kotewicz <marek@ethdev.com>\n * Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\n// TODO: is these line is supposed to be here? \nif (\"build\" !== 'build') {/*\n var XMLHttpRequest = require('xmlhttprequest').XMLHttpRequest; // jshint ignore:line\n*/}\n\nvar HttpRpcProvider = function (host) {\n this.handlers = [];\n this.host = host;\n};\n\nfunction formatJsonRpcObject(object) {\n return {\n jsonrpc: '2.0',\n method: object.call,\n params: object.args,\n id: object._id\n };\n}\n\nfunction formatJsonRpcMessage(message) {\n var object = JSON.parse(message);\n\n return {\n _id: object.id,\n data: object.result,\n error: object.error\n };\n}\n\nHttpRpcProvider.prototype.sendRequest = function (payload, cb) {\n var data = formatJsonRpcObject(payload);\n\n var request = new XMLHttpRequest();\n request.open(\"POST\", this.host, true);\n request.send(JSON.stringify(data));\n request.onreadystatechange = function () {\n if (request.readyState === 4 && cb) {\n cb(request);\n }\n };\n};\n\nHttpRpcProvider.prototype.send = function (payload) {\n var self = this;\n this.sendRequest(payload, function (request) {\n self.handlers.forEach(function (handler) {\n handler.call(self, formatJsonRpcMessage(request.responseText));\n });\n });\n};\n\nHttpRpcProvider.prototype.poll = function (payload, id) {\n var self = this;\n this.sendRequest(payload, function (request) {\n var parsed = JSON.parse(request.responseText);\n if (parsed.error || (parsed.result instanceof Array ? parsed.result.length === 0 : !parsed.result)) {\n return;\n }\n self.handlers.forEach(function (handler) {\n handler.call(self, {_event: payload.call, _id: id, data: parsed.result});\n });\n });\n};\n\nObject.defineProperty(HttpRpcProvider.prototype, \"onmessage\", {\n set: function (handler) {\n this.handlers.push(handler);\n }\n});\n\nmodule.exports = HttpRpcProvider;\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 qt.js\n * @authors:\n * Jeffrey Wilcke <jeff@ethdev.com>\n * Marek Kotewicz <marek@ethdev.com>\n * @date 2014\n */\n\nvar QtProvider = function() {\n this.handlers = [];\n\n var self = this;\n navigator.qt.onmessage = function (message) {\n self.handlers.forEach(function (handler) {\n handler.call(self, JSON.parse(message.data));\n });\n };\n};\n\nQtProvider.prototype.send = function(payload) {\n navigator.qt.postMessage(JSON.stringify(payload));\n};\n\nObject.defineProperty(QtProvider.prototype, \"onmessage\", {\n set: function(handler) {\n this.handlers.push(handler);\n }\n});\n\nmodule.exports = QtProvider;\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 main.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\nfunction flattenPromise (obj) {\n if (obj instanceof Promise) {\n return Promise.resolve(obj);\n }\n\n if (obj instanceof Array) {\n return new Promise(function (resolve) {\n var promises = obj.map(function (o) {\n return flattenPromise(o);\n });\n\n return Promise.all(promises).then(function (res) {\n for (var i = 0; i < obj.length; i++) {\n obj[i] = res[i];\n }\n resolve(obj);\n });\n });\n }\n\n if (obj instanceof Object) {\n return new Promise(function (resolve) {\n var keys = Object.keys(obj);\n var promises = keys.map(function (key) {\n return flattenPromise(obj[key]);\n });\n\n return Promise.all(promises).then(function (res) {\n for (var i = 0; i < keys.length; i++) {\n obj[keys[i]] = res[i];\n }\n resolve(obj);\n });\n });\n }\n\n return Promise.resolve(obj);\n}\n\nvar web3Methods = function () {\n return [\n { name: 'sha3', call: 'web3_sha3' }\n ];\n};\n\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: '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\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: 'account', getter: 'eth_account' },\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\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\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\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\nvar shhWatchMethods = function () {\n return [\n { name: 'newFilter', call: 'shh_newFilter' },\n { name: 'uninstallFilter', call: 'shh_uninstallFilter' },\n { name: 'getMessage', call: 'shh_getMessages' }\n ];\n};\n\nvar setupMethods = function (obj, methods) {\n methods.forEach(function (method) {\n obj[method.name] = function () {\n return flattenPromise(Array.prototype.slice.call(arguments)).then(function (args) {\n var call = typeof method.call === \"function\" ? method.call(args) : method.call;\n return {call: call, args: args};\n }).then(function (request) {\n return new Promise(function (resolve, reject) {\n web3.provider.send(request, function (err, result) {\n if (!err) {\n resolve(result);\n return;\n }\n reject(err);\n });\n });\n }).catch(function(err) {\n console.error(err);\n });\n };\n });\n};\n\nvar setupProperties = function (obj, properties) {\n properties.forEach(function (property) {\n var proto = {};\n proto.get = function () {\n return new Promise(function(resolve, reject) {\n web3.provider.send({call: property.getter}, function(err, result) {\n if (!err) {\n resolve(result);\n return;\n }\n reject(err);\n });\n });\n };\n if (property.setter) {\n proto.set = function (val) {\n return flattenPromise([val]).then(function (args) {\n return new Promise(function (resolve) {\n web3.provider.send({call: property.setter, args: args}, function (err, result) {\n if (!err) {\n resolve(result);\n return;\n }\n reject(err);\n });\n });\n }).catch(function (err) {\n console.error(err);\n });\n };\n }\n Object.defineProperty(obj, property.name, proto);\n });\n};\n\n// TODO: import from a dependency, don't duplicate.\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\nvar web3 = {\n _callbacks: {},\n _events: {},\n providers: {},\n\n 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 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 for(; i < l; i+=2) {\n var code = hex.charCodeAt(i);\n if(code === 0) {\n break;\n }\n\n str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));\n }\n\n return str;\n },\n\n fromAscii: function(str, pad) {\n pad = pad === undefined ? 32 : pad;\n var hex = this.toHex(str);\n while(hex.length < pad*2)\n hex += \"00\";\n return \"0x\" + hex;\n },\n\n toDecimal: function (val) {\n return hexToDec(val.substring(2));\n },\n\n fromDecimal: function (val) {\n return \"0x\" + decToHex(val);\n },\n\n 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 = [ 'wei', 'Kwei', 'Mwei', 'Gwei', 'szabo', 'finney', 'ether', 'grand', 'Mether', 'Gether', 'Tether', 'Pether', 'Eether', 'Zether', 'Yether', 'Nether', 'Dether', 'Vether', 'Uether' ];\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\n eth: {\n prototype: Object(), // jshint ignore:line\n watch: function (params) {\n return new Filter(params, ethWatch);\n }\n },\n\n db: {\n prototype: Object() // jshint ignore:line\n },\n\n shh: {\n prototype: Object(), // jshint ignore:line\n watch: function (params) {\n return new Filter(params, shhWatch);\n }\n },\n\n on: function(event, id, cb) {\n if(web3._events[event] === undefined) {\n web3._events[event] = {};\n }\n\n web3._events[event][id] = cb;\n return this;\n },\n\n off: function(event, id) {\n if(web3._events[event] !== undefined) {\n delete web3._events[event][id];\n }\n\n return this;\n },\n\n trigger: function(event, id, data) {\n var callbacks = web3._events[event];\n if (!callbacks || !callbacks[id]) {\n return;\n }\n var cb = callbacks[id];\n cb(data);\n }\n};\n\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};\nsetupMethods(ethWatch, ethWatchMethods());\nvar shhWatch = {\n changed: 'shh_changed'\n};\nsetupMethods(shhWatch, shhWatchMethods());\n\nvar ProviderManager = function() {\n this.queued = [];\n this.polls = [];\n this.ready = false;\n this.provider = undefined;\n this.id = 1;\n\n var self = this;\n var poll = function () {\n if (self.provider && self.provider.poll) {\n self.polls.forEach(function (data) {\n data.data._id = self.id;\n self.id++;\n self.provider.poll(data.data, data.id);\n });\n }\n setTimeout(poll, 12000);\n };\n poll();\n};\n\nProviderManager.prototype.send = function(data, cb) {\n data._id = this.id;\n if (cb) {\n web3._callbacks[data._id] = cb;\n }\n\n data.args = data.args || [];\n this.id++;\n\n if(this.provider !== undefined) {\n this.provider.send(data);\n } else {\n console.warn(\"provider is not set\");\n this.queued.push(data);\n }\n};\n\nProviderManager.prototype.set = function(provider) {\n if(this.provider !== undefined && this.provider.unload !== undefined) {\n this.provider.unload();\n }\n\n this.provider = provider;\n this.ready = true;\n};\n\nProviderManager.prototype.sendQueued = function() {\n for(var i = 0; this.queued.length; i++) {\n // Resend\n this.send(this.queued[i]);\n }\n};\n\nProviderManager.prototype.installed = function() {\n return this.provider !== undefined;\n};\n\nProviderManager.prototype.startPolling = function (data, pollId) {\n if (!this.provider || !this.provider.poll) {\n return;\n }\n this.polls.push({data: data, id: pollId});\n};\n\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\nweb3.provider = new ProviderManager();\n\nweb3.setProvider = function(provider) {\n provider.onmessage = messageHandler;\n web3.provider.set(provider);\n web3.provider.sendQueued();\n};\n\nweb3.haveProvider = function() {\n return !!web3.provider.provider;\n};\n\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\nFilter.prototype.arrived = function(callback) {\n this.changed(callback);\n};\n\nFilter.prototype.changed = function(callback) {\n var self = this;\n this.promise.then(function(id) {\n self.callbacks.push(callback);\n });\n};\n\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\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\nFilter.prototype.messages = function() {\n var self = this;\n return this.promise.then(function (id) {\n return self.impl.getMessages(id);\n });\n};\n\nFilter.prototype.logs = function () {\n return this.messages();\n};\n\nfunction messageHandler(data) {\n if(data._event !== undefined) {\n web3.trigger(data._event, data._id, data.data);\n return;\n }\n\n if(data._id) {\n var cb = web3._callbacks[data._id];\n if (cb) {\n cb.call(this, data.error, data.data);\n delete web3._callbacks[data._id];\n }\n }\n}\n\nmodule.exports = web3;\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 websocket.js\n * @authors:\n * Jeffrey Wilcke <jeff@ethdev.com>\n * Marek Kotewicz <marek@ethdev.com>\n * Marian Oancea <marian@ethdev.com>\n * @date 2014\n */\n\n// TODO: is these line is supposed to be here? \nif (\"build\" !== 'build') {/*\n var WebSocket = require('ws'); // jshint ignore:line\n*/}\n\nvar WebSocketProvider = function(host) {\n // onmessage handlers\n this.handlers = [];\n // queue will be filled with messages if send is invoked before the ws is ready\n this.queued = [];\n this.ready = false;\n\n this.ws = new WebSocket(host);\n\n var self = this;\n this.ws.onmessage = function(event) {\n for(var i = 0; i < self.handlers.length; i++) {\n self.handlers[i].call(self, JSON.parse(event.data), event);\n }\n };\n\n this.ws.onopen = function() {\n self.ready = true;\n\n for(var i = 0; i < self.queued.length; i++) {\n // Resend\n self.send(self.queued[i]);\n }\n };\n};\n\nWebSocketProvider.prototype.send = function(payload) {\n if(this.ready) {\n var data = JSON.stringify(payload);\n\n this.ws.send(data);\n } else {\n this.queued.push(payload);\n }\n};\n\nWebSocketProvider.prototype.onMessage = function(handler) {\n this.handlers.push(handler);\n};\n\nWebSocketProvider.prototype.unload = function() {\n this.ws.close();\n};\nObject.defineProperty(WebSocketProvider.prototype, \"onmessage\", {\n set: function(provider) { this.onMessage(provider); }\n});\n\nmodule.exports = WebSocketProvider;\n",
