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const urlUtil = require('url')
const Dnode = require('dnode')
const eos = require('end-of-stream')
const Migrator = require('pojo-migrator')
const migrations = require('./lib/migrations')
const LocalStorageStore = require('./lib/observable/local-storage')
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 and Persistence
//
// state persistence
let dataStore = new LocalStorageStore({ storageKey: STORAGE_KEY })
// initial state for first time users
if (!dataStore.get()) {
dataStore.put({ meta: { version: 0 }, data: firstTimeState })
}
// migrations
let migrator = new Migrator({
migrations,
// Data persistence methods
loadData: () => dataStore.get(),
setData: (newState) => dataStore.put(newState),
})
//
// MetaMask Controller
//
const controller = new MetamaskController({
// User confirmation callbacks:
showUnconfirmedMessage: triggerUi,
unlockAccountMessage: triggerUi,
showUnapprovedTx: triggerUi,
// initial state
initState: migrator.getData(),
})
// setup state persistence
controller.store.subscribe((newState) => migrator.saveData(newState))
//
// 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
//
// 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'})
}
})
// plugin badge text
controller.txManager.on('updateBadge', updateBadge)
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' })
}
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