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const EventEmitter = require('events').EventEmitter
const Dnode = require('dnode')
const Web3 = require('web3')
const MetaMaskUi = require('../../ui')
const StreamProvider = require('web3-stream-provider')
const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
module.exports = initializePopup
function initializePopup (connectionStream) {
// setup app
connectToAccountManager(connectionStream, setupApp)
}
function connectToAccountManager (connectionStream, cb) {
// setup communication with background
// setup multiplexing
var mx = setupMultiplex(connectionStream)
// connect features
setupControllerConnection(mx.createStream('controller'), cb)
setupWeb3Connection(mx.createStream('provider'))
}
function setupWeb3Connection (connectionStream) {
var providerStream = new StreamProvider()
providerStream.pipe(connectionStream).pipe(providerStream)
connectionStream.on('error', console.error.bind(console))
providerStream.on('error', console.error.bind(console))
global.web3 = new Web3(providerStream)
}
function setupControllerConnection (connectionStream, cb) {
// this is a really sneaky way of adding EventEmitter api
// to a bi-directional dnode instance
var eventEmitter = new EventEmitter()
var accountManagerDnode = Dnode({
sendUpdate: function (state) {
eventEmitter.emit('update', state)
},
})
connectionStream.pipe(accountManagerDnode).pipe(connectionStream)
accountManagerDnode.once('remote', function (accountManager) {
// setup push events
accountManager.on = eventEmitter.on.bind(eventEmitter)
cb(null, accountManager)
})
}
function setupApp (err, accountManager) {
var container = document.getElementById('app-content')
if (err) {
container.innerHTML = '<div class="critical-error">The MetaMask app failed to load: please open and close MetaMask again to restart.</div>'
container.style.height = '80px'
log.error(err.stack)
throw err
}
MetaMaskUi({
container: container,
accountManager: accountManager,
})
}
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