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382 lines
11 KiB
382 lines
11 KiB
const EventEmitter = require('events').EventEmitter
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const inherits = require('util').inherits
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const Transaction = require('ethereumjs-tx')
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const LightwalletKeyStore = require('eth-lightwallet').keystore
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const LightwalletSigner = require('eth-lightwallet').signing
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const async = require('async')
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const clone = require('clone')
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const extend = require('xtend')
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const createId = require('web3-provider-engine/util/random-id')
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const autoFaucet = require('./auto-faucet')
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const configManager = require('./config-manager-singleton')
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const DEFAULT_RPC = 'https://testrpc.metamask.io/'
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module.exports = IdentityStore
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inherits(IdentityStore, EventEmitter)
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function IdentityStore(opts = {}) {
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EventEmitter.call(this)
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// we just use the ethStore to auto-add accounts
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this._ethStore = opts.ethStore
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// lightwallet key store
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this._keyStore = null
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// lightwallet wrapper
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this._idmgmt = null
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this.hdPathString = "m/44'/60'/0'/0"
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this._currentState = {
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selectedAddress: null,
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identities: {},
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}
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// not part of serilized metamask state - only kept in memory
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this._unconfTxCbs = {}
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}
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//
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// public
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//
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IdentityStore.prototype.createNewVault = function(password, entropy, cb){
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delete this._keyStore
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configManager.clearWallet()
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this._createIdmgmt(password, null, entropy, (err) => {
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if (err) return cb(err)
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this._loadIdentities()
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this._didUpdate()
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this._autoFaucet()
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configManager.setShowSeedWords(true)
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var seedWords = this._idmgmt.getSeed()
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cb(null, seedWords)
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})
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}
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IdentityStore.prototype.recoverFromSeed = function(password, seed, cb){
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this._createIdmgmt(password, seed, null, (err) => {
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if (err) return cb(err)
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this._loadIdentities()
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this._didUpdate()
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cb(null, this.getState())
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})
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}
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IdentityStore.prototype.setStore = function(store){
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this._ethStore = store
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}
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IdentityStore.prototype.clearSeedWordCache = function(cb) {
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configManager.setShowSeedWords(false)
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cb(null, configManager.getSelectedAccount())
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}
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IdentityStore.prototype.getState = function(){
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var seedWords = this.getSeedIfUnlocked()
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var wallet = configManager.getWallet()
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return clone(extend(this._currentState, {
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isInitialized: !!configManager.getWallet() && !seedWords,
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isUnlocked: this._isUnlocked(),
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seedWords: seedWords,
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unconfTxs: configManager.unconfirmedTxs(),
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transactions: configManager.getTxList(),
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selectedAddress: configManager.getSelectedAccount(),
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}))
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}
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IdentityStore.prototype.getSeedIfUnlocked = function() {
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var showSeed = configManager.getShouldShowSeedWords()
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var idmgmt = this._idmgmt
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var shouldShow = showSeed && !!idmgmt
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var seedWords = shouldShow ? idmgmt.getSeed() : null
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return seedWords
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}
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IdentityStore.prototype.getSelectedAddress = function(){
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return configManager.getSelectedAccount()
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}
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IdentityStore.prototype.setSelectedAddress = function(address){
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if (!address) {
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var addresses = this._getAddresses()
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address = addresses[0]
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}
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configManager.setSelectedAccount(address)
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this._didUpdate()
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}
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IdentityStore.prototype.getNetwork = function(tries) {
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if (tries === 0) return
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this.web3.version.getNetwork((err, network) => {
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if (err) {
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return this.getNetwork(tries - 1, cb)
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}
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this._currentState.network = network
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})
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}
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IdentityStore.prototype.setLocked = function(cb){
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delete this._keyStore
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delete this._idmgmt
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cb()
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}
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IdentityStore.prototype.submitPassword = function(password, cb){
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this._tryPassword(password, (err) => {
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if (err) return cb(err)
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// load identities before returning...
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this._loadIdentities()
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cb(null, configManager.getSelectedAccount())
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})
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}
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IdentityStore.prototype.exportAccount = function(address, cb) {
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var privateKey = this._idmgmt.exportPrivateKey(address)
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cb(null, privateKey)
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}
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// comes from dapp via zero-client hooked-wallet provider
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IdentityStore.prototype.addUnconfirmedTransaction = function(txParams, cb){
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// create txData obj with parameters and meta data
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var time = (new Date()).getTime()
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var txId = createId()
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txParams.metamaskId = txId
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txParams.metamaskNetworkId = this._currentState.network
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var txData = {
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id: txId,
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txParams: txParams,
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time: time,
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status: 'unconfirmed',
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}
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configManager.addTx(txData)
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console.log('addUnconfirmedTransaction:', txData)
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// keep the cb around for after approval (requires user interaction)
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// This cb fires completion to the Dapp's write operation.
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this._unconfTxCbs[txId] = cb
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// signal update
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this._didUpdate()
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return txId
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}
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// comes from metamask ui
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IdentityStore.prototype.approveTransaction = function(txId, cb){
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var txData = configManager.getTx(txId)
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var txParams = txData.txParams
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var approvalCb = this._unconfTxCbs[txId] || noop
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// accept tx
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cb()
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approvalCb(null, true)
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// clean up
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configManager.confirmTx(txId)
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delete this._unconfTxCbs[txId]
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this._didUpdate()
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}
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// comes from metamask ui
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IdentityStore.prototype.cancelTransaction = function(txId){
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var txData = configManager.getTx(txId)
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var approvalCb = this._unconfTxCbs[txId] || noop
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// reject tx
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approvalCb(null, false)
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// clean up
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configManager.rejectTx(txId)
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delete this._unconfTxCbs[txId]
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this._didUpdate()
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}
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// performs the actual signing, no autofill of params
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IdentityStore.prototype.signTransaction = function(txParams, cb){
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try {
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console.log('signing tx...', txParams)
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var rawTx = this._idmgmt.signTx(txParams)
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cb(null, rawTx)
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} catch (err) {
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cb(err)
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}
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}
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//
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// private
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//
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IdentityStore.prototype._didUpdate = function(){
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this.emit('update', this.getState())
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}
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IdentityStore.prototype._isUnlocked = function(){
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var result = Boolean(this._keyStore) && Boolean(this._idmgmt)
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return result
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}
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// load identities from keyStoreet
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IdentityStore.prototype._loadIdentities = function(){
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if (!this._isUnlocked()) throw new Error('not unlocked')
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var addresses = this._getAddresses()
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addresses.forEach((address, i) => {
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// // add to ethStore
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this._ethStore.addAccount(address)
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// add to identities
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var identity = {
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name: 'Wallet ' + (i+1),
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img: 'QmW6hcwYzXrNkuHrpvo58YeZvbZxUddv69ATSHY3BHpPdd',
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address: address,
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mayBeFauceting: this._mayBeFauceting(i),
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}
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this._currentState.identities[address] = identity
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})
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this._didUpdate()
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}
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// mayBeFauceting
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// If on testnet, index 0 may be fauceting.
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// The UI will have to check the balance to know.
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// If there is no balance and it mayBeFauceting,
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// then it is in fact fauceting.
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IdentityStore.prototype._mayBeFauceting = function(i) {
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var config = configManager.getProvider()
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if (i === 0 &&
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config.type === 'rpc' &&
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config.rpcTarget === DEFAULT_RPC) {
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return true
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}
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return false
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}
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//
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// keyStore managment - unlocking + deserialization
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//
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IdentityStore.prototype._tryPassword = function(password, cb){
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this._createIdmgmt(password, null, null, cb)
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}
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IdentityStore.prototype._createIdmgmt = function(password, seed, entropy, cb){
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var keyStore = null
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LightwalletKeyStore.deriveKeyFromPassword(password, (err, derivedKey) => {
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if (err) return cb(err)
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var serializedKeystore = configManager.getWallet()
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if (seed) {
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try {
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keyStore = this._restoreFromSeed(password, seed, derivedKey)
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} catch (e) {
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return cb(e)
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}
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// returning user, recovering from storage
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} else if (serializedKeystore) {
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keyStore = LightwalletKeyStore.deserialize(serializedKeystore)
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var isCorrect = keyStore.isDerivedKeyCorrect(derivedKey)
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if (!isCorrect) return cb(new Error('Lightwallet - password incorrect'))
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// first time here
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} else {
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keyStore = this._createFirstWallet(entropy, derivedKey)
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}
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this._keyStore = keyStore
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this._idmgmt = new IdManagement({
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keyStore: keyStore,
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derivedKey: derivedKey,
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hdPathSTring: this.hdPathString,
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})
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cb()
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})
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}
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IdentityStore.prototype._restoreFromSeed = function(password, seed, derivedKey) {
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var keyStore = new LightwalletKeyStore(seed, derivedKey, this.hdPathString)
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keyStore.addHdDerivationPath(this.hdPathString, derivedKey, {curve: 'secp256k1', purpose: 'sign'});
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keyStore.setDefaultHdDerivationPath(this.hdPathString)
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keyStore.generateNewAddress(derivedKey, 3)
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configManager.setWallet(keyStore.serialize())
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console.log('restored from seed. saved to keystore')
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return keyStore
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}
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IdentityStore.prototype._createFirstWallet = function(entropy, derivedKey) {
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var secretSeed = LightwalletKeyStore.generateRandomSeed(entropy)
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var keyStore = new LightwalletKeyStore(secretSeed, derivedKey, this.hdPathString)
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keyStore.addHdDerivationPath(this.hdPathString, derivedKey, {curve: 'secp256k1', purpose: 'sign'});
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keyStore.setDefaultHdDerivationPath(this.hdPathString)
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keyStore.generateNewAddress(derivedKey, 3)
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configManager.setWallet(keyStore.serialize())
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console.log('saved to keystore')
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return keyStore
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}
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// get addresses and normalize address hexString
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IdentityStore.prototype._getAddresses = function() {
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return this._keyStore.getAddresses(this.hdPathString).map((address) => { return '0x'+address })
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}
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IdentityStore.prototype._autoFaucet = function() {
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var addresses = this._getAddresses()
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autoFaucet(addresses[0])
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}
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function IdManagement(opts) {
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if (!opts) opts = {}
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this.keyStore = opts.keyStore
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this.derivedKey = opts.derivedKey
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this.hdPathString = "m/44'/60'/0'/0"
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this.getAddresses = function(){
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return keyStore.getAddresses(this.hdPathString).map(function(address){ return '0x'+address })
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}
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this.signTx = function(txParams){
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// normalize values
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txParams.to = ethUtil.addHexPrefix(txParams.to)
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txParams.from = ethUtil.addHexPrefix(txParams.from)
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txParams.value = ethUtil.addHexPrefix(txParams.value)
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txParams.data = ethUtil.addHexPrefix(txParams.data)
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txParams.gasLimit = ethUtil.addHexPrefix(txParams.gasLimit || txParams.gas)
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txParams.nonce = ethUtil.addHexPrefix(txParams.nonce)
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var tx = new Transaction(txParams)
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// sign tx
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var privKeyHex = ethUtil.addHexPrefix(this.keyStore.exportPrivateKey(txParams.from, this.derivedKey, this.hdPathString))
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var privKey = ethUtil.toBuffer(privKeyHex)
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tx.sign(privKey)
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// Add the tx hash to the persisted meta-tx object
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var txHash = ethUtil.bufferToHex(tx.hash())
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var metaTx = configManager.getTx(txParams.metamaskId)
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metaTx.hash = txHash
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configManager.updateTx(metaTx)
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// return raw serialized tx
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var rawTx = ethUtil.bufferToHex(tx.serialize())
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return rawTx
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}
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this.getSeed = function(){
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return this.keyStore.getSeed(this.derivedKey)
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}
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this.exportPrivateKey = function(address) {
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return this.keyStore.exportPrivateKey(address, this.derivedKey, this.hdPathString)
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}
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}
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// util
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function noop(){}
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