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const urlUtil = require('url')
const endOfStream = require('end-of-stream')
const pump = require('pump')
const log = require('loglevel')
const extension = require('extensionizer')
const LocalStorageStore = require('obs-store/lib/localStorage')
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 NotificationManager = require('./lib/notification-manager.js')
const MetamaskController = require('./metamask-controller')
const firstTimeState = require('./first-time-state')
const STORAGE_KEY = 'metamask-config'
const METAMASK_DEBUG = 'GULP_METAMASK_DEBUG'
window.log = log
log.setDefaultLevel(METAMASK_DEBUG ? 'debug' : 'warn')
const platform = new ExtensionPlatform()
const notificationManager = new NotificationManager()
global.METAMASK_NOTIFIER = notificationManager
let popupIsOpen = false
// state persistence
const diskStore = new LocalStorageStore({ storageKey: STORAGE_KEY })
// initialization flow
initialize().catch(log.error)
async function initialize () {
const initState = await loadStateFromPersistence()
await setupController(initState)
log.debug('MetaMask initialization complete.')
}
//
// State and Persistence
//
async function loadStateFromPersistence () {
// migrations
const migrator = new Migrator({ migrations })
// read from disk
let versionedData = diskStore.getState() || migrator.generateInitialState(firstTimeState)
// migrate data
versionedData = await migrator.migrateData(versionedData)
// write to disk
diskStore.putState(versionedData)
// return just the data
return versionedData.data
}
function setupController (initState) {
//
// MetaMask Controller
//
const controller = new MetamaskController({
// User confirmation callbacks:
showUnconfirmedMessage: triggerUi,
unlockAccountMessage: triggerUi,
showUnapprovedTx: triggerUi,
// initial state
initState,
// platform specific api
platform,
})
global.metamaskController = controller
// setup state persistence
pump(
asStream(controller.store),
storeTransform(versionifyData),
asStream(diskStore)
)
function versionifyData (state) {
const versionedData = diskStore.getState()
versionedData.data = state
return versionedData
}
//
// connect to other contexts
//
extension.runtime.onConnect.addListener(connectRemote)
function connectRemote (remotePort) {
const isMetaMaskInternalProcess = remotePort.name === 'popup' || remotePort.name === 'notification'
const portStream = new PortStream(remotePort)
if (isMetaMaskInternalProcess) {
// communication with popup
popupIsOpen = popupIsOpen || (remotePort.name === 'popup')
controller.setupTrustedCommunication(portStream, 'MetaMask')
// record popup as closed
if (remotePort.name === 'popup') {
endOfStream(portStream, () => {
popupIsOpen = false
})
}
} else {
// communication with page
const originDomain = urlUtil.parse(remotePort.sender.url).hostname
controller.setupUntrustedCommunication(portStream, originDomain)
}
}
//
// User Interface setup
//
updateBadge()
controller.txController.on('update:badge', updateBadge)
controller.messageManager.on('updateBadge', updateBadge)
controller.personalMessageManager.on('updateBadge', updateBadge)
// plugin badge text
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...
//
// popup trigger
function triggerUi () {
if (!popupIsOpen) 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'})
}
})
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