/**
* @file The entry point for the web extension singleton process.
*/
const urlUtil = require('url')
const endOfStream = require('end-of-stream')
const pump = require('pump')
const debounce = require('debounce-stream')
const log = require('loglevel')
const extension = require('extensionizer')
const LocalStorageStore = require('obs-store/lib/localStorage')
const LocalStore = require('./lib/local-store')
const storeTransform = require('obs-store/lib/transform')
const asStream = require('obs-store/lib/asStream')
const ExtensionPlatform = require('./platforms/extension')
const Migrator = require('./lib/migrator/')
const migrations = require('./migrations/')
const PortStream = require('./lib/port-stream.js')
const createStreamSink = require('./lib/createStreamSink')
const NotificationManager = require('./lib/notification-manager.js')
const MetamaskController = require('./metamask-controller')
const firstTimeState = require('./first-time-state')
const setupRaven = require('./lib/setupRaven')
const reportFailedTxToSentry = require('./lib/reportFailedTxToSentry')
const setupMetamaskMeshMetrics = require('./lib/setupMetamaskMeshMetrics')
const EdgeEncryptor = require('./edge-encryptor')
const getFirstPreferredLangCode = require('./lib/get-first-preferred-lang-code')
const getObjStructure = require('./lib/getObjStructure')
const {
ENVIRONMENT_TYPE_POPUP,
ENVIRONMENT_TYPE_NOTIFICATION,
ENVIRONMENT_TYPE_FULLSCREEN,
} = require('./lib/enums')
const STORAGE_KEY = 'metamask-config'
const METAMASK_DEBUG = process.env.METAMASK_DEBUG
log.setDefaultLevel(process.env.METAMASK_DEBUG ? 'debug' : 'warn')
const platform = new ExtensionPlatform()
const notificationManager = new NotificationManager()
global.METAMASK_NOTIFIER = notificationManager
// setup sentry error reporting
const release = platform.getVersion()
const raven = setupRaven({ release })
// browser check if it is Edge - https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
// Internet Explorer 6-11
const isIE = !!document.documentMode
// Edge 20+
const isEdge = !isIE && !!window.StyleMedia
let popupIsOpen = false
let notificationIsOpen = false
const openMetamaskTabsIDs = {}
// state persistence
const diskStore = new LocalStorageStore({ storageKey: STORAGE_KEY })
const localStore = new LocalStore()
let versionedData
// initialization flow
initialize().catch(log.error)
// setup metamask mesh testing container
setupMetamaskMeshMetrics()
/**
* An object representing a transaction, in whatever state it is in.
* @typedef TransactionMeta
*
* @property {number} id - An internally unique tx identifier.
* @property {number} time - Time the tx was first suggested, in unix epoch time (ms).
* @property {string} status - The current transaction status (unapproved, signed, submitted, dropped, failed, rejected), as defined in `tx-state-manager.js`.
* @property {string} metamaskNetworkId - The transaction's network ID, used for EIP-155 compliance.
* @property {boolean} loadingDefaults - TODO: Document
* @property {Object} txParams - The tx params as passed to the network provider.
* @property {Object[]} history - A history of mutations to this TransactionMeta object.
* @property {boolean} gasPriceSpecified - True if the suggesting dapp specified a gas price, prevents auto-estimation.
* @property {boolean} gasLimitSpecified - True if the suggesting dapp specified a gas limit, prevents auto-estimation.
* @property {string} estimatedGas - A hex string represented the estimated gas limit required to complete the transaction.
* @property {string} origin - A string representing the interface that suggested the transaction.
* @property {Object} nonceDetails - A metadata object containing information used to derive the suggested nonce, useful for debugging nonce issues.
* @property {string} rawTx - A hex string of the final signed transaction, ready to submit to the network.
* @property {string} hash - A hex string of the transaction hash, used to identify the transaction on the network.
* @property {number} submittedTime - The time the transaction was submitted to the network, in Unix epoch time (ms).
*/
/**
* The data emitted from the MetaMaskController.store EventEmitter, also used to initialize the MetaMaskController. Available in UI on React state as state.metamask.
* @typedef MetaMaskState
* @property {boolean} isInitialized - Whether the first vault has been created.
* @property {boolean} isUnlocked - Whether the vault is currently decrypted and accounts are available for selection.
* @property {boolean} isAccountMenuOpen - Represents whether the main account selection UI is currently displayed.
* @property {boolean} isMascara - True if the current context is the extensionless MetaMascara project.
* @property {boolean} isPopup - Returns true if the current view is an externally-triggered notification.
* @property {string} rpcTarget - DEPRECATED - The URL of the current RPC provider.
* @property {Object} identities - An object matching lower-case hex addresses to Identity objects with "address" and "name" (nickname) keys.
* @property {Object} unapprovedTxs - An object mapping transaction hashes to unapproved transactions.
* @property {boolean} noActiveNotices - False if there are notices the user should confirm before using the application.
* @property {Array} frequentRpcList - A list of frequently used RPCs, including custom user-provided ones.
* @property {Array} addressBook - A list of previously sent to addresses.
* @property {address} selectedTokenAddress - Used to indicate if a token is globally selected. Should be deprecated in favor of UI-centric token selection.
* @property {Object} tokenExchangeRates - Info about current token prices.
* @property {Array} tokens - Tokens held by the current user, including their balances.
* @property {Object} send - TODO: Document
* @property {Object} coinOptions - TODO: Document
* @property {boolean} useBlockie - Indicates preferred user identicon format. True for blockie, false for Jazzicon.
* @property {Object} featureFlags - An object for optional feature flags.
* @property {string} networkEndpointType - TODO: Document
* @property {boolean} isRevealingSeedWords - True if seed words are currently being recovered, and should be shown to user.
* @property {boolean} welcomeScreen - True if welcome screen should be shown.
* @property {string} currentLocale - A locale string matching the user's preferred display language.
* @property {Object} provider - The current selected network provider.
* @property {string} provider.rpcTarget - The address for the RPC API, if using an RPC API.
* @property {string} provider.type - An identifier for the type of network selected, allows MetaMask to use custom provider strategies for known networks.
* @property {string} network - A stringified number of the current network ID.
* @property {Object} accounts - An object mapping lower-case hex addresses to objects with "balance" and "address" keys, both storing hex string values.
* @property {hex} currentBlockGasLimit - The most recently seen block gas limit, in a lower case hex prefixed string.
* @property {TransactionMeta[]} selectedAddressTxList - An array of transactions associated with the currently selected account.
* @property {Object} unapprovedMsgs - An object of messages associated with the currently selected account, mapping a unique ID to the options.
* @property {number} unapprovedMsgCount - The number of messages in unapprovedMsgs.
* @property {Object} unapprovedPersonalMsgs - An object of messages associated with the currently selected account, mapping a unique ID to the options.
* @property {number} unapprovedPersonalMsgCount - The number of messages in unapprovedPersonalMsgs.
* @property {Object} unapprovedTypedMsgs - An object of messages associated with the currently selected account, mapping a unique ID to the options.
* @property {number} unapprovedTypedMsgCount - The number of messages in unapprovedTypedMsgs.
* @property {string[]} keyringTypes - An array of unique keyring identifying strings, representing available strategies for creating accounts.
* @property {Keyring[]} keyrings - An array of keyring descriptions, summarizing the accounts that are available for use, and what keyrings they belong to.
* @property {Object} computedBalances - Maps accounts to their balances, accounting for balance changes from pending transactions.
* @property {string} currentAccountTab - A view identifying string for displaying the current displayed view, allows user to have a preferred tab in the old UI (between tokens and history).
* @property {string} selectedAddress - A lower case hex string of the currently selected address.
* @property {string} currentCurrency - A string identifying the user's preferred display currency, for use in showing conversion rates.
* @property {number} conversionRate - A number representing the current exchange rate from the user's preferred currency to Ether.
* @property {number} conversionDate - A unix epoch date (ms) for the time the current conversion rate was last retrieved.
* @property {Object} infuraNetworkStatus - An object of infura network status checks.
* @property {Block[]} recentBlocks - An array of recent blocks, used to calculate an effective but cheap gas price.
* @property {Array} shapeShiftTxList - An array of objects describing shapeshift exchange attempts.
* @property {Array} lostAccounts - TODO: Remove this feature. A leftover from the version-3 migration where our seed-phrase library changed to fix a bug where some accounts were mis-generated, but we recovered the old accounts as "lost" instead of losing them.
* @property {boolean} forgottenPassword - Returns true if the user has initiated the password recovery screen, is recovering from seed phrase.
*/
/**
* @typedef VersionedData
* @property {MetaMaskState} data - The data emitted from MetaMask controller, or used to initialize it.
* @property {Number} version - The latest migration version that has been run.
*/
/**
* Initializes the MetaMask controller, and sets up all platform configuration.
* @returns {Promise} Setup complete.
*/
async function initialize () {
const initState = await loadStateFromPersistence()
const initLangCode = await getFirstPreferredLangCode()
await setupController(initState, initLangCode)
log.debug('MetaMask initialization complete.')
}
//
// State and Persistence
//
/**
* Loads any stored data, prioritizing the latest storage strategy.
* Migrates that data schema in case it was last loaded on an older version.
* @returns {Promise<MetaMaskState>} Last data emitted from previous instance of MetaMask.
*/
async function loadStateFromPersistence () {
// migrations
const migrator = new Migrator({ migrations })
// read from disk
// first from preferred, async API:
versionedData = (await localStore.get()) ||
diskStore.getState() ||
migrator.generateInitialState(firstTimeState)
// check if somehow state is empty
// this should never happen but new error reporting suggests that it has
// for a small number of users
// https://github.com/metamask/metamask-extension/issues/3919
if (versionedData && !versionedData.data) {
// try to recover from diskStore incase only localStore is bad
const diskStoreState = diskStore.getState()
if (diskStoreState && diskStoreState.data) {
// we were able to recover (though it might be old)
versionedData = diskStoreState
const vaultStructure = getObjStructure(versionedData)
raven.captureMessage('MetaMask - Empty vault found - recovered from diskStore', {
// "extra" key is required by Sentry
extra: { vaultStructure },
})
} else {
// unable to recover, clear state
versionedData = migrator.generateInitialState(firstTimeState)
raven.captureMessage('MetaMask - Empty vault found - unable to recover')
}
}
// report migration errors to sentry
migrator.on('error', (err) => {
// get vault structure without secrets
const vaultStructure = getObjStructure(versionedData)
raven.captureException(err, {
// "extra" key is required by Sentry
extra: { vaultStructure },
})
})
// migrate data
versionedData = await migrator.migrateData(versionedData)
if (!versionedData) {
throw new Error('MetaMask - migrator returned undefined')
}
// write to disk
if (localStore.isSupported) {
localStore.set(versionedData)
} else {
// throw in setTimeout so as to not block boot
setTimeout(() => {
throw new Error('MetaMask - Localstore not supported')
})
}
// return just the data
return versionedData.data
}
/**
* Initializes the MetaMask Controller with any initial state and default language.
* Configures platform-specific error reporting strategy.
* Streams emitted state updates to platform-specific storage strategy.
* Creates platform listeners for new Dapps/Contexts, and sets up their data connections to the controller.
*
* @param {Object} initState - The initial state to start the controller with, matches the state that is emitted from the controller.
* @param {String} initLangCode - The region code for the language preferred by the current user.
* @returns {Promise} After setup is complete.
*/
function setupController (initState, initLangCode) {
//
// MetaMask Controller
//
const controller = new MetamaskController({
// User confirmation callbacks:
showUnconfirmedMessage: triggerUi,
unlockAccountMessage: triggerUi,
showUnapprovedTx: triggerUi,
// initial state
initState,
// initial locale code
initLangCode,
// platform specific api
platform,
encryptor: isEdge ? new EdgeEncryptor() : undefined,
})
global.metamaskController = controller
// report failed transactions to Sentry
controller.txController.on(`tx:status-update`, (txId, status) => {
if (status !== 'failed') return
const txMeta = controller.txController.txStateManager.getTx(txId)
try {
reportFailedTxToSentry({ raven, txMeta })
} catch (e) {
console.error(e)
}
})
// setup state persistence
pump(
asStream(controller.store),
debounce(1000),
storeTransform(versionifyData),
createStreamSink(persistData),
(error) => {
log.error('MetaMask - Persistence pipeline failed', error)
}
)
/**
* Assigns the given state to the versioned object (with metadata), and returns that.
* @param {Object} state - The state object as emitted by the MetaMaskController.
* @returns {VersionedData} The state object wrapped in an object that includes a metadata key.
*/
function versionifyData (state) {
versionedData.data = state
return versionedData
}
async function persistData (state) {
if (!state) {
throw new Error('MetaMask - updated state is missing', state)
}
if (!state.data) {
throw new Error('MetaMask - updated state does not have data', state)
}
if (localStore.isSupported) {
try {
await localStore.set(state)
} catch (err) {
// log error so we dont break the pipeline
log.error('error setting state in local store:', err)
}
}
}
//
// connect to other contexts
//
extension.runtime.onConnect.addListener(connectRemote)
extension.runtime.onConnectExternal.addListener(connectExternal)
const metamaskInternalProcessHash = {
[ENVIRONMENT_TYPE_POPUP]: true,
[ENVIRONMENT_TYPE_NOTIFICATION]: true,
[ENVIRONMENT_TYPE_FULLSCREEN]: true,
}
const isClientOpenStatus = () => {
return popupIsOpen || Boolean(Object.keys(openMetamaskTabsIDs).length) || notificationIsOpen
}
/**
* A runtime.Port object, as provided by the browser:
* @see https://developer.mozilla.org/en-US/Add-ons/WebExtensions/API/runtime/Port
* @typedef Port
* @type Object
*/
/**
* Connects a Port to the MetaMask controller via a multiplexed duplex stream.
* This method identifies trusted (MetaMask) interfaces, and connects them differently from untrusted (web pages).
* @param {Port} remotePort - The port provided by a new context.
*/
function connectRemote (remotePort) {
const processName = remotePort.name
const isMetaMaskInternalProcess = metamaskInternalProcessHash[processName]
if (isMetaMaskInternalProcess) {
const portStream = new PortStream(remotePort)
// communication with popup
controller.isClientOpen = true
controller.setupTrustedCommunication(portStream, 'MetaMask')
if (processName === ENVIRONMENT_TYPE_POPUP) {
popupIsOpen = true
endOfStream(portStream, () => {
popupIsOpen = false
controller.isClientOpen = isClientOpenStatus()
})
}
if (processName === ENVIRONMENT_TYPE_NOTIFICATION) {
notificationIsOpen = true
endOfStream(portStream, () => {
notificationIsOpen = false
controller.isClientOpen = isClientOpenStatus()
})
}
if (processName === ENVIRONMENT_TYPE_FULLSCREEN) {
const tabId = remotePort.sender.tab.id
openMetamaskTabsIDs[tabId] = true
endOfStream(portStream, () => {
delete openMetamaskTabsIDs[tabId]
controller.isClientOpen = isClientOpenStatus()
})
}
} else {
connectExternal(remotePort)
}
}
// communication with page or other extension
function connectExternal (remotePort) {
const originDomain = urlUtil.parse(remotePort.sender.url).hostname
const portStream = new PortStream(remotePort)
controller.setupUntrustedCommunication(portStream, originDomain)
}
//
// User Interface setup
//
updateBadge()
controller.txController.on('update:badge', updateBadge)
controller.messageManager.on('updateBadge', updateBadge)
controller.personalMessageManager.on('updateBadge', updateBadge)
/**
* Updates the Web Extension's "badge" number, on the little fox in the toolbar.
* The number reflects the current number of pending transactions or message signatures needing user approval.
*/
function updateBadge () {
var label = ''
var unapprovedTxCount = controller.txController.getUnapprovedTxCount()
var unapprovedMsgCount = controller.messageManager.unapprovedMsgCount
var unapprovedPersonalMsgs = controller.personalMessageManager.unapprovedPersonalMsgCount
var unapprovedTypedMsgs = controller.typedMessageManager.unapprovedTypedMessagesCount
var count = unapprovedTxCount + unapprovedMsgCount + unapprovedPersonalMsgs + unapprovedTypedMsgs
if (count) {
label = String(count)
}
extension.browserAction.setBadgeText({ text: label })
extension.browserAction.setBadgeBackgroundColor({ color: '#506F8B' })
}
return Promise.resolve()
}
//
// Etc...
//
/**
* Opens the browser popup for user confirmation
*/
function triggerUi () {
extension.tabs.query({ active: true }, tabs => {
const currentlyActiveMetamaskTab = Boolean(tabs.find(tab => openMetamaskTabsIDs[tab.id]))
if (!popupIsOpen && !currentlyActiveMetamaskTab && !notificationIsOpen) {
notificationManager.showPopup()
}
})
}
// On first install, open a window to MetaMask website to how-it-works.
extension.runtime.onInstalled.addListener(function (details) {
if ((details.reason === 'install') && (!METAMASK_DEBUG)) {
extension.tabs.create({url: 'https://metamask.io/#how-it-works'})
}
})
