300 lines
9.0 KiB
JavaScript
300 lines
9.0 KiB
JavaScript
'use strict';
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var rlp = require('rlp');
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var Contract = require('./contract.js');
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var providers = require('./providers.js');
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var SigningKey = require('./signing-key.js');
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var utils = require('./utils.js');
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// This ensures we inject a setImmediate into the global space, which
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// dramatically improves the performance of the scrypt PBKDF.
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require('setimmediate');
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var transactionFields = [
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{name: 'nonce', maxLength: 32, },
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{name: 'gasPrice', maxLength: 32, },
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{name: 'gasLimit', maxLength: 32, },
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{name: 'to', length: 20, },
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{name: 'value', maxLength: 32, },
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{name: 'data'},
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];
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function Wallet(privateKey, provider) {
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if (!(this instanceof Wallet)) { throw new Error('missing new'); }
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// Make sure we have a valid signing key
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var signingKey = privateKey;
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if (!(privateKey instanceof SigningKey)) {
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signingKey = new SigningKey(privateKey);
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}
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utils.defineProperty(this, 'privateKey', signingKey.privateKey);
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Object.defineProperty(this, 'provider', {
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enumerable: true,
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get: function() { return provider; },
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set: function(value) {
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if (value !== null && !providers.isProvider(value)) {
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throw new Error('invalid provider');
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}
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provider = value;
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}
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});
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Object.defineProperty(this, '_provider', {
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enumerable: true,
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get: function() {
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if (!provider) { throw new Error('missing provider'); }
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return provider;
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},
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});
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if (provider !== null) {
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// If no provider was provided, check for metamask or ilk
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if (provider === undefined) {
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if (global.web3 && global.web3.currentProvider && global.web3.currentProvider.sendAsync) {
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this.provider = new providers.Web3Provider(global.web3.currentProvider);
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}
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// An Ethereum RPC node
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} else if (typeof(provider) === 'string' && provider.match(/^https?:\/\//)) {
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this.provider = new providers.HttpProvider(provider);
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} else {
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this.provider = provider;
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}
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}
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utils.defineProperty(this, 'address', signingKey.address);
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utils.defineProperty(this, 'sign', function(transaction) {
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var raw = [];
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transactionFields.forEach(function(fieldInfo) {
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var value = transaction[fieldInfo.name] || (new Buffer(0));
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value = utils.hexOrBuffer(utils.hexlify(value), fieldInfo.name);
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// Fixed-width field
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if (fieldInfo.length && value.length !== fieldInfo.length) {
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var error = new Error('invalid ' + fieldInfo.name);
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error.reason = 'wrong length';
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error.value = value;
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throw error;
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}
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// Variable-width (with a maximum)
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if (fieldInfo.maxLength) {
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value = utils.stripZeros(value);
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if (value.length > fieldInfo.maxLength) {
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var error = new Error('invalid ' + fieldInfo.name);
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error.reason = 'too long';
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error.value = value;
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throw error;
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}
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}
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raw.push(value);
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});
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var digest = utils.sha3(rlp.encode(raw));
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var signature = signingKey.signDigest(digest);
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var s = signature.s;
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var v = signature.recoveryParam;
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raw.push(new Buffer([27 + v]));
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raw.push(utils.bnToBuffer(signature.r));
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raw.push(utils.bnToBuffer(s));
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return ('0x' + rlp.encode(raw).toString('hex'));
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});
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}
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utils.defineProperty(Wallet.prototype, 'getBalance', function(blockNumber) {
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var provider = this._provider;
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var self = this;
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return new Promise(function(resolve, reject) {
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provider.getBalance(self.address, blockNumber).then(function(balance) {
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resolve(balance);
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}, function(error) {
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reject(error);
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});
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});
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});
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utils.defineProperty(Wallet.prototype, 'getTransactionCount', function(blockNumber) {
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var provider = this._provider;
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var self = this;
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return new Promise(function(resolve, reject) {
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provider.getTransactionCount(self.address, blockNumber).then(function(transactionCount) {
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resolve(transactionCount);
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}, function(error) {
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reject(error);
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});
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});
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});
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utils.defineProperty(Wallet.prototype, 'estimateGas', function(transaction) {
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var provider = this._provider;
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transaction = utils.cloneObject(transaction);
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if (transaction.from == null) { transaction.from = this.address; }
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return new Promise(function(resolve, reject) {
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provider.estimateGas(transaction).then(function(gasEstimate) {
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resolve(gasEstimate);
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}, function(error) {
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reject(error);
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});
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});
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});
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utils.defineProperty(Wallet.prototype, 'sendTransaction', function(transaction) {
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var gasLimit = transaction.gasLimit;
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if (gasLimit == null) { gasLimit = 3000000; }
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var self = this;
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var provider = this._provider;
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var gasPrice = new Promise(function(resolve, reject) {
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if (transaction.gasPrice) {
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return resolve(transaction.gasPrice);
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}
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provider.getGasPrice().then(function(gasPrice) {
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resolve(gasPrice);
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}, function(error) {
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reject(error);
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});
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});
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var nonce = new Promise(function(resolve, reject) {
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if (transaction.nonce) {
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return resolve(transaction.nonce);
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}
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provider.getTransactionCount(self.address, 'pending').then(function(transactionCount) {
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resolve(transactionCount);
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}, function(error) {
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reject(error);
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});
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});
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return new Promise(function(resolve, reject) {
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Promise.all([gasPrice, nonce]).then(function(results) {
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var signedTransaction = self.sign({
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to: transaction.to,
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gasLimit: gasLimit,
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gasPrice: results[0],
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nonce: results[1],
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value: transaction.value
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});
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provider.sendTransaction(signedTransaction).then(function(txid) {
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resolve(txid);
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}, function(error) {
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reject(error);
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});
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}, function(error) {
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reject(error);
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});
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});
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});
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utils.defineProperty(Wallet.prototype, 'send', function(address, amountWei, options) {
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address = SigningKey.getAddress(address);
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if (utils.BN.isBN(amountWei)) {
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amountWei = '0x' + utils.bnToBuffer(amountWei).toString('hex');
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}
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if (!utils.isHexString(amountWei)) { throw new Error('invalid amountWei'); }
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if (!options) { options = {}; }
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return this.sendTransaction({
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to: address,
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gasLimit: options.gasLimit,
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gasPrice: options.gasPrice,
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nonce: options.nonce,
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value: amountWei,
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});
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});
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utils.defineProperty(Wallet.prototype, 'getContract', function(address, abi) {
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return new Contract(this, address, new Contract.Interface(abi));
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});
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utils.defineProperty(Wallet, 'getAddress', SigningKey.getAddress);
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utils.defineProperty(Wallet, 'getIcapAddress', SigningKey.getIcapAddress);
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utils.defineProperty(Wallet, '_Contract', Contract);
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var zero = new utils.BN(0);
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var negative1 = new utils.BN(-1);
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var tenPower18 = new utils.BN('1000000000000000000');
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utils.defineProperty(Wallet, 'formatEther', function(wei, options) {
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if (typeof(wei) === 'number') { wei = new utils.BN(wei); }
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if (!options) { options = {}; }
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if (!(wei instanceof utils.BN)) { throw new Error('invalid wei'); }
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var negative = wei.lt(zero);
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if (negative) { wei = wei.mul(negative1); }
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var fraction = wei.mod(tenPower18).toString(10);
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while (fraction.length < 18) { fraction = '0' + fraction; }
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if (!options.pad) {
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fraction = fraction.match(/^([0-9]*[1-9]|0)(0*)/)[1];
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}
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var whole = wei.div(tenPower18).toString(10);
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if (options.commify) {
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whole = whole.replace(/\B(?=(\d{3})+(?!\d))/g, ",")
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}
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var value = whole + '.' + fraction;
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if (negative) { value = '-' + value; }
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return value;
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});
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utils.defineProperty(Wallet, 'parseEther', function(ether) {
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if (typeof(ether) !== 'string' || !ether.match(/^-?[0-9.]+$/)) {
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throw new Error('invalid value');
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}
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// Is it negative?
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var negative = (ether.substring(0, 1) === '-');
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if (negative) { ether = ether.substring(1); }
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if (ether === '.') { throw new Error('invalid value'); }
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// Split it into a whole and fractional part
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var comps = ether.split('.');
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if (comps.length > 2) { throw new Error('too many decimal points'); }
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var whole = comps[0], fraction = comps[1];
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if (!whole) { whole = '0'; }
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if (!fraction) { fraction = '0'; }
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if (fraction.length > 18) { throw new Error('too many decimal places'); }
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while (fraction.length < 18) { fraction += '0'; }
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whole = new utils.BN(whole);
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fraction = new utils.BN(fraction);
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var wei = (whole.mul(tenPower18)).add(fraction);
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if (negative) { wei = wei.mul(negative1); }
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return wei;
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});
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module.exports = Wallet;
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