410 lines
14 KiB
JavaScript
410 lines
14 KiB
JavaScript
var aes = require('aes-js');
|
|
var elliptic = require('elliptic');
|
|
//var elliptic = require('./elliptic/lib/elliptic.js');
|
|
var pbkdf2 = require('pbkdf2');
|
|
var rlp = require('rlp');
|
|
var scrypt = require('scrypt-js');
|
|
var uuid = require('uuid');
|
|
|
|
var Contract = require('./lib/contract.js');
|
|
|
|
var utils = require('./lib/utils.js');
|
|
var BN = utils.BN;
|
|
|
|
var secp256k1 = new (elliptic.ec)('secp256k1');
|
|
|
|
/*
|
|
// @TODO: Make our own implementation of rlp; the existing one is MLP-2.0, we want MIT. :)
|
|
function rlpEncodeLength(length) {
|
|
}
|
|
|
|
function rlpArray(items) {
|
|
var output = new Buffer(0);
|
|
for (var i = 0; i < items.length; i++) {
|
|
}
|
|
}
|
|
*/
|
|
|
|
function defineProperty(object, name, value) {
|
|
Object.defineProperty(object, name, {
|
|
enumerable: true,
|
|
value: value
|
|
});
|
|
}
|
|
|
|
var exportUtils = {};
|
|
|
|
// These may go away in the future...
|
|
defineProperty(exportUtils, '_aes', aes);
|
|
defineProperty(exportUtils, '_scrypt', scrypt);
|
|
|
|
defineProperty(exportUtils, 'BN', BN);
|
|
defineProperty(exportUtils, 'Buffer', Buffer);
|
|
defineProperty(exportUtils, 'sha3', utils.sha3);
|
|
defineProperty(exportUtils, 'sha256', utils.sha256);
|
|
|
|
function getChecksumAddress(address) {
|
|
if (typeof(address) !== 'string' || !address.match(/^0x[0-9A-Fa-f]{40}$/)) {
|
|
throw new Error('invalid address');
|
|
}
|
|
|
|
address = address.substring(2).toLowerCase();
|
|
var hashed = utils.sha3(address);
|
|
|
|
address = address.split('');
|
|
for (var i = 0; i < 40; i += 2) {
|
|
if ((hashed[i >> 1] >> 4) >= 8) {
|
|
address[i] = address[i].toUpperCase();
|
|
}
|
|
if ((hashed[i >> 1] & 0x0f) >= 8) {
|
|
address[i + 1] = address[i + 1].toUpperCase();
|
|
}
|
|
}
|
|
|
|
return '0x' + address.join('');
|
|
}
|
|
|
|
// See: https://en.wikipedia.org/wiki/International_Bank_Account_Number
|
|
var ibanChecksum = (function() {
|
|
|
|
// Create lookup table
|
|
var ibanLookup = {};
|
|
for (var i = 0; i < 10; i++) { ibanLookup[String(i)] = String(i); }
|
|
for (var i = 0; i < 26; i++) { ibanLookup[String.fromCharCode(65 + i)] = String(10 + i); }
|
|
|
|
// How many decimal digits can we process? (for 64-bit float, this is 15)
|
|
var safeDigits = Math.floor(Math.log10(Number.MAX_SAFE_INTEGER));
|
|
|
|
return function(address) {
|
|
address = address.toUpperCase();
|
|
address = address.substring(4) + address.substring(0, 2) + '00';
|
|
|
|
var expanded = address.split('');
|
|
for (var i = 0; i < expanded.length; i++) {
|
|
expanded[i] = ibanLookup[expanded[i]];
|
|
}
|
|
expanded = expanded.join('');
|
|
|
|
// Javascript can handle integers safely up to 15 (decimal) digits
|
|
while (expanded.length >= safeDigits){
|
|
var block = expanded.substring(0, safeDigits);
|
|
expanded = parseInt(block, 10) % 97 + expanded.substring(block.length);
|
|
}
|
|
|
|
checksum = String(98 - (parseInt(expanded, 10) % 97));
|
|
while (checksum.length < 2) { checksum = '0' + checksum; }
|
|
|
|
return checksum;
|
|
};
|
|
})();
|
|
|
|
// http://ethereum.stackexchange.com/questions/760/how-is-the-address-of-an-ethereum-contract-computed
|
|
defineProperty(exportUtils, 'getContractAddress', function(transaction) {
|
|
if (typeof(address) !== 'string' || !address.match(/^0x[0-9A-Fa-f]{40}$/)) {
|
|
throw new Error('invalid from');
|
|
}
|
|
|
|
return '0x' + utils.sha3(rlp.encode([
|
|
utils.hexOrBuffer(transaction.from),
|
|
utils.hexOrBuffer(utils.hexlify(transaction.nonce, 'nonce'))
|
|
])).slice(12).toString('hex');
|
|
});
|
|
|
|
var transactionFields = [
|
|
{name: 'nonce', maxLength: 32, },
|
|
{name: 'gasPrice', maxLength: 32, },
|
|
{name: 'gasLimit', maxLength: 32, },
|
|
{name: 'to', length: 20, },
|
|
{name: 'value', maxLength: 32, },
|
|
{name: 'data'},
|
|
];
|
|
|
|
|
|
function Wallet(privateKey) {
|
|
if (!(this instanceof Wallet)) { throw new Error('missing new'); }
|
|
|
|
if (typeof(privateKey) === 'string' && privateKey.match(/^0x[0-9A-Fa-f]{64}$/)) {
|
|
privateKey = new Buffer(privateKey.substring(2), 'hex');
|
|
} else if (!Buffer.isBuffer(privateKey) || privateKey.length !== 32) {
|
|
throw new Error('invalid private key');
|
|
}
|
|
|
|
var keyPair = secp256k1.keyFromPrivate(privateKey);
|
|
|
|
var publicKey = (new Buffer(keyPair.getPublic(false, 'hex'), 'hex')).slice(1);
|
|
var address = Wallet.getAddress(utils.sha3(publicKey).slice(12).toString('hex'));
|
|
defineProperty(this, 'address', address);
|
|
|
|
defineProperty(this, 'sign', function(transaction) {
|
|
var raw = [];
|
|
transactionFields.forEach(function(fieldInfo) {
|
|
var value = transaction[fieldInfo.name] || (new Buffer(0));
|
|
value = utils.hexOrBuffer(utils.hexlify(value), fieldInfo.name);
|
|
|
|
// Fixed-width field
|
|
if (fieldInfo.length && value.length !== fieldInfo.length) {
|
|
var error = new Error('invalid ' + fieldInfo.name);
|
|
error.reason = 'wrong length';
|
|
error.value = value;
|
|
throw error;
|
|
}
|
|
|
|
// Variable-width (with a maximum)
|
|
if (fieldInfo.maxLength) {
|
|
value = utils.stripZeros(value);
|
|
if (value.length > fieldInfo.maxLength) {
|
|
var error = new Error('invalid ' + fieldInfo.name);
|
|
error.reason = 'too long';
|
|
error.value = value;
|
|
throw error;
|
|
}
|
|
}
|
|
|
|
raw.push(value);
|
|
});
|
|
|
|
var digest = utils.sha3(rlp.encode(raw));
|
|
|
|
var signature = keyPair.sign(digest, {canonical: true});
|
|
var s = signature.s;
|
|
var v = signature.recoveryParam;
|
|
|
|
raw.push(new Buffer([27 + v]));
|
|
raw.push(utils.bnToBuffer(signature.r));
|
|
raw.push(utils.bnToBuffer(s));
|
|
|
|
return ('0x' + rlp.encode(raw).toString('hex'));
|
|
});
|
|
}
|
|
|
|
defineProperty(Wallet, 'utils', exportUtils);
|
|
|
|
defineProperty(Wallet, 'getAddress', function(address) {
|
|
var result = null;
|
|
|
|
if (typeof(address) !== 'string') { throw new Error('invalid address'); }
|
|
|
|
if (address.match(/^(0x)?[0-9a-fA-F]{40}$/)) {
|
|
|
|
// Missing the 0x prefix
|
|
if (address.substring(0, 2) !== '0x') { address = '0x' + address; }
|
|
|
|
result = getChecksumAddress(address);
|
|
|
|
// It is a checksummed address with a bad checksum
|
|
if (address.match(/([A-F].*[a-f])|([a-f].*[A-F])/) && result !== address) {
|
|
throw new Error('invalid address checksum');
|
|
}
|
|
|
|
// Maybe ICAP? (we only support direct mode)
|
|
} else if (address.match(/^XE[0-9]{2}[0-9A-Za-z]{30,31}$/)) {
|
|
|
|
// It is an ICAP address with a bad checksum
|
|
if (address.substring(2, 4) !== ibanChecksum(address)) {
|
|
throw new Error('invalid address icap checksum');
|
|
}
|
|
|
|
result = (new BN(address.substring(4), 36)).toString(16);
|
|
while (result.length < 40) { result = '0' + result; }
|
|
result = getChecksumAddress('0x' + result);
|
|
|
|
} else {
|
|
throw new Error('invalid address');
|
|
}
|
|
|
|
return result;
|
|
});
|
|
|
|
defineProperty(Wallet, 'getIcapAddress', function(address) {
|
|
address = Wallet.getAddress(address).substring(2);
|
|
var base36 = (new BN(address, 16)).toString(36).toUpperCase();
|
|
while (base36.length < 30) { base36 = '0' + base36; }
|
|
return 'XE' + ibanChecksum('XE00' + base36) + base36;
|
|
});
|
|
|
|
defineProperty(Wallet, '_Contract', Contract);
|
|
|
|
var allowedTransactionKeys = {
|
|
data: true, from: true, gasLimit: true, gasPrice:true, to: true, value: true
|
|
}
|
|
function AttachedContract(web3, wallet, contractAddress, contract) {
|
|
utils.defineProperty(this, 'web3', web3);
|
|
utils.defineProperty(this, 'wallet', wallet);
|
|
utils.defineProperty(this, 'contractAddress', contractAddress);
|
|
|
|
utils.defineProperty(this, '_contract', contract);
|
|
|
|
function getWeb3Promise(method) {
|
|
var params = Array.prototype.slice.call(arguments, 1);
|
|
return new Promise(function(resolve, reject) {
|
|
params.push(function(error, result) {
|
|
if (error) {
|
|
return reject(error);
|
|
}
|
|
resolve(result);
|
|
});
|
|
web3.eth[method].apply(web3, params);
|
|
});
|
|
}
|
|
|
|
var self = this;
|
|
|
|
var filters = {};
|
|
function setupFilter(call, callback) {
|
|
var info = filters[call.name];
|
|
|
|
// Stop and remove the filter
|
|
if (!callback) {
|
|
if (info) { info.filter.stopWatching(); }
|
|
delete filters[call.name];
|
|
return;
|
|
}
|
|
|
|
if (typeof(callback) !== 'function') {
|
|
throw new Error('invalid callback');
|
|
}
|
|
|
|
// Already have a filter, just update the callback
|
|
if (info) {
|
|
info.callback = callback;
|
|
return;
|
|
}
|
|
|
|
info = {callback: callback};
|
|
filters[call.name] = info;
|
|
|
|
// Start a new filter
|
|
info.filter = web3.eth.filter({
|
|
address: contractAddress,
|
|
topics: call.topics
|
|
}, function(error, result) {
|
|
// @TODO: Emit errors to .onerror? Maybe?
|
|
if (error) {
|
|
console.log(error);
|
|
return;
|
|
}
|
|
|
|
try {
|
|
info.callback.apply(self, call.parse(result.data));
|
|
} catch(error) {
|
|
console.log(error);
|
|
}
|
|
});
|
|
}
|
|
|
|
function runMethod(method) {
|
|
return function() {
|
|
var transaction = {}
|
|
|
|
var params = Array.prototype.slice.call(arguments);
|
|
if (params.length == contract[method].inputs.length + 1) {
|
|
transaction = params.pop();
|
|
if (typeof(transaction) !== 'object') {
|
|
throw new Error('invalid transaction overrides');
|
|
}
|
|
for (var key in transaction) {
|
|
if (!allowedTransactionKeys[key]) {
|
|
throw new Error('unknown transaction override ' + key);
|
|
}
|
|
}
|
|
}
|
|
|
|
var call = contract[method].apply(contract, params);
|
|
switch (call.type) {
|
|
case 'call':
|
|
['data', 'gasLimit', 'gasPrice', 'to', 'value'].forEach(function(key) {
|
|
if (transaction[key] != null) {
|
|
throw new Error('call cannot override ' + key) ;
|
|
}
|
|
});
|
|
transaction.data = call.data;
|
|
if (transaction.from == null) {
|
|
transaction.from = wallet.address;
|
|
}
|
|
transaction.to = contractAddress;
|
|
|
|
return new Promise(function(resolve, reject) {
|
|
getWeb3Promise('call', transaction).then(function(value) {
|
|
resolve(call.parse(value));
|
|
}, function(error) {
|
|
reject(error);
|
|
});
|
|
});
|
|
|
|
case 'transaction':
|
|
['data', 'from', 'to'].forEach(function(key) {
|
|
if (transaction[key] != null) {
|
|
throw new Error('transaction cannot override ' + key) ;
|
|
}
|
|
});
|
|
transaction.data = call.data;
|
|
transaction.to = contractAddress;
|
|
if (transaction.gasLimit == null) {
|
|
transaction.gasLimit = 3000000;
|
|
}
|
|
|
|
return new Promise(function(resolve, reject) {
|
|
Promise.all([
|
|
getWeb3Promise('getTransactionCount', wallet.address, 'pending'),
|
|
getWeb3Promise('getGasPrice'),
|
|
]).then(function(results) {
|
|
if (transaction.nonce == null) {
|
|
transaction.nonce = results[0];
|
|
} else if (console.warn) {
|
|
console.warn('Overriding suggested nonce: ' + results[0]);
|
|
}
|
|
if (transaction.gasPrice == null) {
|
|
transaction.gasPrice = results[1];
|
|
} else if (console.warn) {
|
|
console.warn('Overriding suggested gasPrice: ' + utils.hexlify(results[1]));
|
|
}
|
|
var signedTransaction = wallet.sign(transaction);
|
|
/*
|
|
data: call.data,
|
|
gasLimit: 3000000,
|
|
gasPrice: results[1],
|
|
nonce: results[0],
|
|
to: contractAddress,
|
|
});
|
|
*/
|
|
getWeb3Promise('sendRawTransaction', signedTransaction).then(function(txid) {
|
|
resolve(txid);
|
|
}, function(error) {
|
|
reject(error);
|
|
});
|
|
}, function(error) {
|
|
reject(error);
|
|
});
|
|
});
|
|
}
|
|
};
|
|
}
|
|
|
|
contract.methods.forEach(function(method) {
|
|
utils.defineProperty(this, method, runMethod(method));
|
|
}, this);
|
|
|
|
contract.events.forEach(function(method) {
|
|
var call = contract[method].apply(contract, []);
|
|
Object.defineProperty(self, 'on' + call.name.toLowerCase(), {
|
|
enumerable: true,
|
|
get: function() {
|
|
console.log('get');
|
|
var info = filters[call.name];
|
|
if (!info || !info[call.name]) { return null; }
|
|
return info.callback;
|
|
},
|
|
set: function(value) {
|
|
console.log('set');
|
|
setupFilter(call, value);
|
|
}
|
|
});
|
|
}, this);
|
|
}
|
|
|
|
defineProperty(Wallet.prototype, 'getContract', function(web3, address, abi) {
|
|
return new AttachedContract(web3, this, address, new Contract(abi));
|
|
});
|
|
|
|
module.exports = Wallet;
|