/*
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 web3.js
* @authors:
* Jeffrey Wilcke <jeff@ethdev.com>
* Marek Kotewicz <marek@ethdev.com>
* Marian Oancea <marian@ethdev.com>
* Gav Wood <g@ethdev.com>
* @date 2014
*/
if (process.env.NODE_ENV !== 'build') {
var BigNumber = require('bignumber.js');
}
var ETH_UNITS = [
'wei',
'Kwei',
'Mwei',
'Gwei',
'szabo',
'finney',
'ether',
'grand',
'Mether',
'Gether',
'Tether',
'Pether',
'Eether',
'Zether',
'Yether',
'Nether',
'Dether',
'Vether',
'Uether'
];
/// @returns an array of objects describing web3 api methods
var web3Methods = function () {
return [
{ name: 'sha3', call: 'web3_sha3' }
];
};
/// @returns an array of objects describing web3.eth api methods
var ethMethods = function () {
var blockCall = function (args) {
return typeof args[0] === "string" ? "eth_blockByHash" : "eth_blockByNumber";
};
var transactionCall = function (args) {
return typeof args[0] === "string" ? 'eth_transactionByHash' : 'eth_transactionByNumber';
};
var uncleCall = function (args) {
return typeof args[0] === "string" ? 'eth_uncleByHash' : 'eth_uncleByNumber';
};
var methods = [
{ 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: blockCall },
{ name: 'transaction', call: transactionCall },
{ name: 'uncle', call: uncleCall },
{ 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 methods;
};
/// @returns an array of objects describing web3.eth api properties
var ethProperties = 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'}
];
};
/// @returns an array of objects describing web3.db api methods
var dbMethods = function () {
return [
{ name: 'put', call: 'db_put' },
{ name: 'get', call: 'db_get' },
{ name: 'putString', call: 'db_putString' },
{ name: 'getString', call: 'db_getString' }
];
};
/// @returns an array of objects describing web3.shh api methods
var shhMethods = 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' }
];
};
/// @returns an array of objects describing web3.eth.watch api methods
var ethWatchMethods = function () {
var newFilter = function (args) {
return typeof args[0] === 'string' ? 'eth_newFilterString' : 'eth_newFilter';
};
return [
{ name: 'newFilter', call: newFilter },
{ name: 'uninstallFilter', call: 'eth_uninstallFilter' },
{ name: 'getMessages', call: 'eth_filterLogs' }
];
};
/// @returns an array of objects describing web3.shh.watch api methods
var shhWatchMethods = function () {
return [
{ name: 'newFilter', call: 'shh_newFilter' },
{ name: 'uninstallFilter', call: 'shh_uninstallFilter' },
{ name: 'getMessages', call: 'shh_getMessages' }
];
};
/// creates methods in a given object based on method description on input
/// setups api calls for these methods
var setupMethods = function (obj, methods) {
methods.forEach(function (method) {
obj[method.name] = function () {
var args = Array.prototype.slice.call(arguments);
var call = typeof method.call === 'function' ? method.call(args) : method.call;
return web3.provider.send({
call: call,
args: args
});
};
});
};
/// creates properties in a given object based on properties description on input
/// setups api calls for these properties
var setupProperties = function (obj, properties) {
properties.forEach(function (property) {
var proto = {};
proto.get = function () {
return web3.provider.send({
call: property.getter
});
};
if (property.setter) {
proto.set = function (val) {
return web3.provider.send({
call: property.setter,
args: [val]
});
};
}
Object.defineProperty(obj, property.name, proto);
});
};
/// setups web3 object, and it's in-browser executed methods
var web3 = {
_callbacks: {},
_events: {},
providers: {},
toHex: function(str) {
var hex = "";
for(var i = 0; i < str.length; i++) {
var n = str.charCodeAt(i).toString(16);
hex += n.length < 2 ? '0' + n : n;
}
return hex;
},
/// @returns ascii string representation of hex value prefixed with 0x
toAscii: function(hex) {
// Find termination
var str = "";
var i = 0, l = hex.length;
if (hex.substring(0, 2) === '0x')
i = 2;
for(; i < l; i+=2) {
var code = parseInt(hex.substr(i, 2), 16);
if(code === 0) {
break;
}
str += String.fromCharCode(code);
}
return str;
},
/// @returns hex representation (prefixed by 0x) of ascii string
fromAscii: function(str, pad) {
pad = pad === undefined ? 0 : pad;
var hex = this.toHex(str);
while(hex.length < pad*2)
hex += "00";
return "0x" + hex;
},
/// @returns decimal representaton of hex value prefixed by 0x
toDecimal: function (val) {
// remove 0x and place 0, if it's required
val = val.length > 2 ? val.substring(2) : "0";
return (new BigNumber(val, 16).toString(10));
},
/// @returns hex representation (prefixed by 0x) of decimal value
fromDecimal: function (val) {
return "0x" + (new BigNumber(val).toString(16));
},
/// used to transform value/string to eth string
/// TODO: use BigNumber.js to parse int
toEth: function(str) {
var val = typeof str === "string" ? str.indexOf('0x') === 0 ? parseInt(str.substr(2), 16) : parseInt(str) : str;
var unit = 0;
var units = ETH_UNITS;
while (val > 3000 && unit < units.length - 1)
{
val /= 1000;
unit++;
}
var s = val.toString().length < val.toFixed(2).length ? val.toString() : val.toFixed(2);
var replaceFunction = function($0, $1, $2) {
return $1 + ',' + $2;
};
while (true) {
var o = s;
s = s.replace(/(\d)(\d\d\d[\.\,])/, replaceFunction);
if (o === s)
break;
}
return s + ' ' + units[unit];
},
/// eth object prototype
eth: {
contractFromAbi: function (abi) {
return function(addr) {
// Default to address of Config. TODO: rremove prior to genesis.
addr = addr || '0xc6d9d2cd449a754c494264e1809c50e34d64562b';
var ret = web3.eth.contract(addr, abi);
ret.address = addr;
return ret;
};
},
watch: function (params) {
return new web3.filter(params, ethWatch);
}
},
/// db object prototype
db: {},
/// shh object prototype
shh: {
watch: function (params) {
return new web3.filter(params, shhWatch);
}
},
/// @returns true if provider is installed
haveProvider: function() {
return !!web3.provider.provider;
}
};
/// setups all api methods
setupMethods(web3, web3Methods());
setupMethods(web3.eth, ethMethods());
setupProperties(web3.eth, ethProperties());
setupMethods(web3.db, dbMethods());
setupMethods(web3.shh, shhMethods());
var ethWatch = {
changed: 'eth_changed'
};
setupMethods(ethWatch, ethWatchMethods());
var shhWatch = {
changed: 'shh_changed'
};
setupMethods(shhWatch, shhWatchMethods());
web3.setProvider = function(provider) {
//provider.onmessage = messageHandler; // there will be no async calls, to remove
web3.provider.set(provider);
};
module.exports = web3;
