const ethUtil = require('ethereumjs-util') module.exports = IdManagement function IdManagement(opts) { if (!opts) opts = {} this.keyStore = opts.keyStore this.derivedKey = opts.derivedKey this.hdPathString = "m/44'/60'/0'/0" this.getAddresses = function(){ return keyStore.getAddresses(this.hdPathString).map(function(address){ return '0x'+address }) } this.signTx = function(txParams){ // normalize values txParams.to = ethUtil.addHexPrefix(txParams.to) txParams.from = ethUtil.addHexPrefix(txParams.from) txParams.value = ethUtil.addHexPrefix(txParams.value) txParams.data = ethUtil.addHexPrefix(txParams.data) txParams.gasLimit = ethUtil.addHexPrefix(txParams.gasLimit || txParams.gas) txParams.nonce = ethUtil.addHexPrefix(txParams.nonce) var tx = new Transaction(txParams) // sign tx var privKeyHex = this.exportPrivateKey(txParams.from) var privKey = ethUtil.toBuffer(privKeyHex) tx.sign(privKey) // Add the tx hash to the persisted meta-tx object var txHash = ethUtil.bufferToHex(tx.hash()) var metaTx = configManager.getTx(txParams.metamaskId) metaTx.hash = txHash configManager.updateTx(metaTx) // return raw serialized tx var rawTx = ethUtil.bufferToHex(tx.serialize()) return rawTx } this.signMsg = function (address, message) { // sign message var privKeyHex = this.exportPrivateKey(address); var privKey = ethUtil.toBuffer(privKeyHex); var msgSig = ethUtil.ecsign(new Buffer(message.replace('0x',''), 'hex'), privKey); var rawMsgSig = ethUtil.bufferToHex(concatSig(msgSig.v, msgSig.r, msgSig.s)); return rawMsgSig; }; this.getSeed = function(){ return this.keyStore.getSeed(this.derivedKey) } this.exportPrivateKey = function(address) { var privKeyHex = ethUtil.addHexPrefix(this.keyStore.exportPrivateKey(address, this.derivedKey, this.hdPathString)) return privKeyHex } } function pad_with_zeroes(number, length){ var my_string = '' + number; while (my_string.length < length) { my_string = '0' + my_string; } return my_string; } function concatSig(v, r, s) { r = pad_with_zeroes(ethUtil.fromSigned(r), 64) s = pad_with_zeroes(ethUtil.fromSigned(s), 64) r = ethUtil.stripHexPrefix(r.toString('hex')) s = ethUtil.stripHexPrefix(s.toString('hex')) v = ethUtil.stripHexPrefix(ethUtil.intToHex(v)) return ethUtil.addHexPrefix(r.concat(s, v)) }