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metamask-extension/app/scripts/popup.js

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JavaScript
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const url = require('url')
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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 Web3 = require('web3')
const MetaMaskUi = require('../../ui')
const MetaMaskUiCss = require('../../ui/css')
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const injectCss = require('inject-css')
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const PortStream = require('./lib/port-stream.js')
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const StreamProvider = require('./lib/stream-provider.js')
const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
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// setup app
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var css = MetaMaskUiCss()
injectCss(css)
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async.parallel({
currentDomain: getCurrentDomain,
accountManager: connectToAccountManager,
}, getNetworkVersion)
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function connectToAccountManager(cb){
// setup communication with background
var pluginPort = chrome.runtime.connect({name: 'popup'})
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var portStream = new PortStream(pluginPort)
// setup multiplexing
var mx = setupMultiplex(portStream)
// connect features
setupControllerConnection(mx.createStream('controller'), cb)
setupWeb3Connection(mx.createStream('provider'))
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}
function setupWeb3Connection(stream){
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var remoteProvider = new StreamProvider()
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remoteProvider.pipe(stream).pipe(remoteProvider)
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stream.on('error', console.error.bind(console))
remoteProvider.on('error', console.error.bind(console))
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global.web3 = new Web3(remoteProvider)
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}
function setupControllerConnection(stream, cb){
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var eventEmitter = new EventEmitter()
var background = Dnode({
sendUpdate: function(state){
eventEmitter.emit('update', state)
},
})
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stream.pipe(background).pipe(stream)
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background.once('remote', function(accountManager){
// setup push events
accountManager.on = eventEmitter.on.bind(eventEmitter)
cb(null, accountManager)
})
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}
function getCurrentDomain(cb){
chrome.tabs.query({active: true, currentWindow: true}, function(results){
var activeTab = results[0]
var currentUrl = activeTab && activeTab.url
var currentDomain = url.parse(currentUrl).host
if (!currentUrl) {
return cb(null, '<unknown>')
}
cb(null, currentDomain)
})
}
function getNetworkVersion(cb, results) {
web3.version.getNetwork(function(err, result) {
results.networkVersion = result
setupApp(err, results)
})
}
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function setupApp(err, opts){
if (err) {
alert(err.stack)
throw err
return
}
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var container = document.getElementById('app-content')
var app = MetaMaskUi({
container: container,
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accountManager: opts.accountManager,
currentDomain: opts.currentDomain,
networkVersion: opts.networkVersion,
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})
}