mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-11-23 02:10:12 +01:00
78 lines
2.8 KiB
JavaScript
78 lines
2.8 KiB
JavaScript
const EventEmitter = require('events').EventEmitter
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const async = require('async')
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const Dnode = require('dnode')
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const Eth = require('ethjs')
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const EthQuery = require('eth-query')
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const launchMetamaskUi = require('../../ui')
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const StreamProvider = require('web3-stream-provider')
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const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
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module.exports = initializePopup
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/**
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* Asynchronously initializes the MetaMask popup UI
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*
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* @param {{ container: Element, connectionStream: * }} config Popup configuration object
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* @param {Function} cb Called when initialization is complete
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*/
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function initializePopup ({ container, connectionStream }, cb) {
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// setup app
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async.waterfall([
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(cb) => connectToAccountManager(connectionStream, cb),
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(accountManager, cb) => launchMetamaskUi({ container, accountManager }, cb),
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], cb)
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}
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/**
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* Establishes streamed connections to background scripts and a Web3 provider
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*
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* @param {PortDuplexStream} connectionStream PortStream instance establishing a background connection
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* @param {Function} cb Called when controller connection is established
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*/
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function connectToAccountManager (connectionStream, cb) {
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// setup communication with background
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// setup multiplexing
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var mx = setupMultiplex(connectionStream)
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// connect features
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setupControllerConnection(mx.createStream('controller'), cb)
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setupWeb3Connection(mx.createStream('provider'))
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}
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/**
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* Establishes a streamed connection to a Web3 provider
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*
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* @param {PortDuplexStream} connectionStream PortStream instance establishing a background connection
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*/
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function setupWeb3Connection (connectionStream) {
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var providerStream = new StreamProvider()
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providerStream.pipe(connectionStream).pipe(providerStream)
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connectionStream.on('error', console.error.bind(console))
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providerStream.on('error', console.error.bind(console))
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global.ethereumProvider = providerStream
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global.ethQuery = new EthQuery(providerStream)
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global.eth = new Eth(providerStream)
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}
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/**
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* Establishes a streamed connection to the background account manager
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*
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* @param {PortDuplexStream} connectionStream PortStream instance establishing a background connection
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* @param {Function} cb Called when the remote account manager connection is established
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*/
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function setupControllerConnection (connectionStream, cb) {
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// this is a really sneaky way of adding EventEmitter api
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// to a bi-directional dnode instance
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var eventEmitter = new EventEmitter()
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var accountManagerDnode = Dnode({
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sendUpdate: function (state) {
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eventEmitter.emit('update', state)
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},
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})
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connectionStream.pipe(accountManagerDnode).pipe(connectionStream)
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accountManagerDnode.once('remote', function (accountManager) {
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// setup push events
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accountManager.on = eventEmitter.on.bind(eventEmitter)
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cb(null, accountManager)
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})
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}
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