mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-11-24 02:58:09 +01:00
133 lines
3.9 KiB
JavaScript
133 lines
3.9 KiB
JavaScript
/*global Web3*/
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cleanContextForImports()
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require('web3/dist/web3.min.js')
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const log = require('loglevel')
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const LocalMessageDuplexStream = require('post-message-stream')
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const setupDappAutoReload = require('./lib/auto-reload.js')
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const MetamaskInpageProvider = require('metamask-inpage-provider')
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restoreContextAfterImports()
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log.setDefaultLevel(process.env.METAMASK_DEBUG ? 'debug' : 'warn')
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console.warn('ATTENTION: In an effort to improve user privacy, MetaMask will ' +
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'stop exposing user accounts to dapps by default beginning November 2nd, 2018. ' +
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'Dapps should call provider.enable() in order to view and use accounts. Please see ' +
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'https://bit.ly/2QQHXvF for complete information and up-to-date example code.')
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//
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// setup plugin communication
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//
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// setup background connection
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var metamaskStream = new LocalMessageDuplexStream({
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name: 'inpage',
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target: 'contentscript',
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})
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// compose the inpage provider
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var inpageProvider = new MetamaskInpageProvider(metamaskStream)
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// Augment the provider with its enable method
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inpageProvider.enable = function (options = {}) {
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return new Promise((resolve, reject) => {
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if (options.mockRejection) {
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reject('User rejected account access')
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} else {
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inpageProvider.sendAsync({ method: 'eth_accounts', params: [] }, (error, response) => {
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if (error) {
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reject(error)
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} else {
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resolve(response.result)
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}
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})
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}
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})
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}
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// Work around for web3@1.0 deleting the bound `sendAsync` but not the unbound
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// `sendAsync` method on the prototype, causing `this` reference issues with drizzle
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const proxiedInpageProvider = new Proxy(inpageProvider, {
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// straight up lie that we deleted the property so that it doesnt
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// throw an error in strict mode
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deleteProperty: () => true,
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})
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window.ethereum = proxiedInpageProvider
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//
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// setup web3
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//
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if (typeof window.web3 !== 'undefined') {
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throw new Error(`MetaMask detected another web3.
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MetaMask will not work reliably with another web3 extension.
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This usually happens if you have two MetaMasks installed,
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or MetaMask and another web3 extension. Please remove one
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and try again.`)
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}
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var web3 = new Web3(proxiedInpageProvider)
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web3.setProvider = function () {
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log.debug('MetaMask - overrode web3.setProvider')
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}
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log.debug('MetaMask - injected web3')
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setupDappAutoReload(web3, inpageProvider.publicConfigStore)
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// export global web3, with usage-detection and deprecation warning
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/* TODO: Uncomment this area once auto-reload.js has been deprecated:
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let hasBeenWarned = false
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global.web3 = new Proxy(web3, {
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get: (_web3, key) => {
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// show warning once on web3 access
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if (!hasBeenWarned && key !== 'currentProvider') {
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console.warn('MetaMask: web3 will be deprecated in the near future in favor of the ethereumProvider \nhttps://github.com/MetaMask/faq/blob/master/detecting_metamask.md#web3-deprecation')
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hasBeenWarned = true
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}
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// return value normally
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return _web3[key]
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},
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set: (_web3, key, value) => {
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// set value normally
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_web3[key] = value
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},
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})
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*/
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// set web3 defaultAccount
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inpageProvider.publicConfigStore.subscribe(function (state) {
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web3.eth.defaultAccount = state.selectedAddress
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})
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// need to make sure we aren't affected by overlapping namespaces
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// and that we dont affect the app with our namespace
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// mostly a fix for web3's BigNumber if AMD's "define" is defined...
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var __define
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/**
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* Caches reference to global define object and deletes it to
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* avoid conflicts with other global define objects, such as
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* AMD's define function
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*/
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function cleanContextForImports () {
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__define = global.define
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try {
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global.define = undefined
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} catch (_) {
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console.warn('MetaMask - global.define could not be deleted.')
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}
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}
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/**
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* Restores global define object from cached reference
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*/
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function restoreContextAfterImports () {
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try {
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global.define = __define
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} catch (_) {
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console.warn('MetaMask - global.define could not be overwritten.')
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}
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}
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