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const urlUtil = require('url')
const Dnode = require('dnode')
const eos = require('end-of-stream')
const asyncQ = require('async-q')
const pipe = require('pump')
const LocalStorageStore = require('obs-store/lib/localStorage')
const storeTransform = require('obs-store/lib/transform')
const Migrator = require('./lib/migrator/')
const migrations = require('./migrations/')
const PortStream = require('./lib/port-stream.js')
const notification = require('./lib/notifications.js')
const messageManager = require('./lib/message-manager')
const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
const MetamaskController = require('./metamask-controller')
const extension = require('./lib/extension')
const firstTimeState = require('./first-time-state')
const STORAGE_KEY = 'metamask-config'
const METAMASK_DEBUG = 'GULP_METAMASK_DEBUG'
let popupIsOpen = false
// state persistence
const diskStore = new LocalStorageStore({ storageKey: STORAGE_KEY })
// initialization flow
asyncQ.waterfall([
() => loadStateFromPersistence(),
(initState) => setupController(initState),
])
.then(() => console.log('MetaMask initialization complete.'))
.catch((err) => { console.error(err) })
//
// State and Persistence
//
function loadStateFromPersistence() {
// migrations
let migrator = new Migrator({ migrations })
let initialState = migrator.generateInitialState(firstTimeState)
return asyncQ.waterfall([
// read from disk
() => Promise.resolve(diskStore.getState() || initialState),
// migrate data
(versionedData) => migrator.migrateData(versionedData),
// write to disk
(versionedData) => {
diskStore.putState(versionedData)
return Promise.resolve(versionedData)
},
// resolve to just data
(versionedData) => Promise.resolve(versionedData.data),
])
}
function setupController (initState) {
//
// MetaMask Controller
//
const controller = new MetamaskController({
// User confirmation callbacks:
showUnconfirmedMessage: triggerUi,
unlockAccountMessage: triggerUi,
showUnapprovedTx: triggerUi,
// initial state
initState,
})
global.metamaskController = controller
// setup state persistence
pipe(
controller.store,
storeTransform(versionifyData),
diskStore
)
function versionifyData(state) {
let versionedData = diskStore.getState()
versionedData.data = state
return versionedData
}
//
// connect to other contexts
//
extension.runtime.onConnect.addListener(connectRemote)
function connectRemote (remotePort) {
var isMetaMaskInternalProcess = remotePort.name === 'popup' || remotePort.name === 'notification'
var portStream = new PortStream(remotePort)
if (isMetaMaskInternalProcess) {
// communication with popup
popupIsOpen = remotePort.name === 'popup'
setupTrustedCommunication(portStream, 'MetaMask', remotePort.name)
} else {
// communication with page
var originDomain = urlUtil.parse(remotePort.sender.url).hostname
setupUntrustedCommunication(portStream, originDomain)
}
}
function setupUntrustedCommunication (connectionStream, originDomain) {
// setup multiplexing
var mx = setupMultiplex(connectionStream)
// connect features
controller.setupProviderConnection(mx.createStream('provider'), originDomain)
controller.setupPublicConfig(mx.createStream('publicConfig'))
}
function setupTrustedCommunication (connectionStream, originDomain) {
// setup multiplexing
var mx = setupMultiplex(connectionStream)
// connect features
setupControllerConnection(mx.createStream('controller'))
controller.setupProviderConnection(mx.createStream('provider'), originDomain)
}
//
// remote features
//
function setupControllerConnection (stream) {
controller.stream = stream
var api = controller.getApi()
var dnode = Dnode(api)
stream.pipe(dnode).pipe(stream)
dnode.on('remote', (remote) => {
// push updates to popup
var sendUpdate = remote.sendUpdate.bind(remote)
controller.on('update', sendUpdate)
// teardown on disconnect
eos(stream, () => {
controller.removeListener('update', sendUpdate)
popupIsOpen = false
})
})
}
//
// User Interface setup
//
updateBadge()
controller.txManager.on('updateBadge', updateBadge)
// plugin badge text
function updateBadge () {
var label = ''
var unapprovedTxCount = controller.txManager.unapprovedTxCount
var unconfMsgs = messageManager.unconfirmedMsgs()
var unconfMsgLen = Object.keys(unconfMsgs).length
var count = unapprovedTxCount + unconfMsgLen
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) notification.show()
}
// 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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