enabling MetaMask via notification when visiting DApp website

app/browser/reducers/dappReducer.js

@@ -0,0 +1,81 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+'use strict'
+
+const appConstants = require('../../../js/constants/appConstants')
+const {makeImmutable} = require('../../common/state/immutableUtil')
+const locale = require('../../locale')
+const appActions = require('../../../js/actions/appActions')
+const {ipcMain} = require('electron')
+const messages = require('../../../js/constants/messages')
+const settings = require('../../../js/constants/settings')
+const getSetting = require('../../../js/settings').getSetting
+const tabActions = require('../../common/actions/tabActions')
+const tabState = require('../../common/state/tabState')
+const config = require('../../../js/constants/config')
+
+const dappReducer = (state, action, immutableAction) => {
+  action = immutableAction || makeImmutable(action)
+  switch (action.get('actionType')) {
+    case appConstants.APP_DAPP_AVAILABLE:
+      if (!getSetting(settings.METAMASK_PROMPT_DISMISSED) && !getSetting(settings.METAMASK_ENABLED)) {
+        showDappNotification()
+      }
+      break
+  }
+  return state
+}
+
+const notifications = {
+  text: {
+    greeting: locale.translation('updateHello'),
+    message: locale.translation('dappDetected'),
+    enable: locale.translation('dappEnableExtension'),
+    dismiss: locale.translation('dappDismiss')
+  },
+  onResponse: (message, buttonIndex) => {
+    // Index 0 is for dismiss
+    if (buttonIndex === 0) {
+      appActions.changeSetting(settings.METAMASK_PROMPT_DISMISSED, true)
+    }
+    // Index 1 is for enable
+    if (buttonIndex === 1) {
+      appActions.changeSetting(settings.METAMASK_ENABLED, true)
+    }
+    appActions.hideNotification(message)
+  }
+}
+
+process.on('extension-ready', (installInfo) => {
+  if (installInfo.id === config.metamaskExtensionId) {
+    tabActions.reload(tabState.TAB_ID_ACTIVE, true)
+  }
+})
+
+const showDappNotification = () => {
+  appActions.showNotification({
+    greeting: notifications.text.greeting,
+    message: notifications.text.message,
+    buttons: [
+      {text: notifications.text.dismiss},
+      {text: notifications.text.enable}
+    ],
+    options: {
+      persist: false
+    }
+  })
+}
+
+if (ipcMain) {
+  ipcMain.on(messages.NOTIFICATION_RESPONSE, (e, message, buttonIndex) => {
+    switch (message) {
+      case notifications.text.message:
+        notifications.onResponse(message, buttonIndex)
+        break
+    }
+  })
+}
+
+module.exports = dappReducer

app/extensions.js

@@ -95,7 +95,8 @@ let generateBraveManifest = () => {
         js: [
           'content/scripts/adInsertion.js',
           'content/scripts/pageInformation.js',
-          'content/scripts/flashListener.js'
+          'content/scripts/flashListener.js',
+          'content/scripts/dappListener.js'
         ]
       },
       {
@@ -556,6 +557,12 @@ module.exports.init = () => {
       disableExtension(config.metamaskExtensionId)
     }
 
+    if (getSetting(settings.METAMASK_ENABLED)) {
+      registerComponent(config.metamaskExtensionId, config.metamaskPublicKey)
+    } else {
+      disableExtension(config.metamaskExtensionId)
+    }
+
     if (appStore.getState().getIn(['widevine', 'enabled'])) {
       registerComponent(config.widevineComponentId, config.widevineComponentPublicKey)
     }

app/extensions/brave/content/scripts/dappListener.js

@@ -0,0 +1,22 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const script =
+  `if (window.web3) {
+    if (!window.web3.currentProvider || !window.web3.currentProvider.isMetaMask) {
+      const meta = document.createElement('meta')
+      meta.name = 'web3-installed'
+      document.head.appendChild(meta)
+    }
+  }`
+
+executeScript(script)
+const isDapp = document.querySelector('meta[name="web3-installed"]')
+
+if (isDapp) {
+  chrome.ipcRenderer.send('dispatch-action', JSON.stringify([{
+    actionType: 'app-dapp-available',
+    location: window.location.href
+  }]))
+}

app/extensions/brave/locales/en-US/app.properties

@@ -239,6 +239,9 @@ walletConvertedBackup=Back up your new wallet
 walletConvertedDismiss=Later
 walletConvertedLearnMore=Learn More
 walletConvertedToBat=Your BTC will be converted to BAT and will appear in your Brave wallet within approximately 30 minutes.
+dappDetected=This page contains a Dapp, would you like to enable the MetaMask extension?
+dappDismiss=No thanks
+dappEnableExtension=Install MetaMask
 windowCaptionButtonMinimize=Minimize
 windowCaptionButtonMaximize=Maximize
 windowCaptionButtonRestore=Restore Down

app/locale.js

@@ -233,6 +233,9 @@ var rendererIdentifiers = function () {
     'walletConvertedDismiss',
     'walletConvertedLearnMore',
     'walletConvertedToBat',
+    'dappDetected',
+    'dappDismiss',
+    'dappEnableExtension',
     // other
     'passwordsManager',
     'extensionsManager',

app/renderer/lib/extensionsUtil.js

@@ -73,6 +73,12 @@ const dummyData = [
     name: 'honey',
     description: 'honeyDesc',
     icon: 'img/extensions/honey-128.png'
+  },
+  {
+    id: metamask,
+    name: 'MetaMask',
+    description: 'metamaskDesc',
+    icon: 'img/extensions/metamask-128.png'
   }
   // {
   //   id: metamask,

js/constants/appConfig.js

@@ -211,6 +211,7 @@ module.exports = {
     'extensions.honey.enabled': false,
     'extensions.pinterest.enabled': false,
     'extensions.metamask.enabled': false,
+    'extensions.metamask.promptDismissed': false,
     'general.bookmarks-toolbar-mode': null,
     'general.is-default-browser': null,
     'notification-add-funds-timestamp': null,

js/constants/appConstants.js

@@ -92,6 +92,7 @@ const appConstants = {
   APP_ALLOW_FLASH_ONCE: _,
   APP_ALLOW_FLASH_ALWAYS: _,
   APP_FLASH_PERMISSION_REQUESTED: _,
+  APP_DAPP_AVAILABLE: _,
   APP_SHUTTING_DOWN: _,
   APP_CLIPBOARD_TEXT_UPDATED: _,
   APP_TAB_TOGGLE_DEV_TOOLS: _,

js/constants/settings.js

@@ -91,6 +91,7 @@ const settings = {
   HONEY_ENABLED: 'extensions.honey.enabled',
   PINTEREST_ENABLED: 'extensions.pinterest.enabled',
   METAMASK_ENABLED: 'extensions.metamask.enabled',
+  METAMASK_PROMPT_DISMISSED: 'extensions.metamask.promptDismissed',
 
   // DEPRECATED settings
   // DO NOT REMOVE OR CHANGE THESE VALUES

js/stores/appStore.js

@@ -392,6 +392,7 @@ const handleAppAction = (action) => {
     reducers = [
       require('../../app/browser/reducers/downloadsReducer'),
       require('../../app/browser/reducers/flashReducer'),
+      require('../../app/browser/reducers/dappReducer'),
       require('../../app/browser/reducers/autoplayReducer'),
       // tabs, sites and windows reducers need to stay in that order
       // until we have a better way to manage dependencies.

test/bravery-components/notificationBarTest.js

@@ -4,6 +4,7 @@ const Brave = require('../lib/brave')
 const {notificationBar, titleBar, urlInput, reloadButton} = require('../lib/selectors')
 const {autoplayOption} = require('../../app/common/constants/settingsEnums')
 const {AUTOPLAY_MEDIA} = require('../../js/constants/settings')
+const settings = require('../../js/constants/settings')
 
 describe('notificationBar permissions', function () {
   function * setup (client) {
@@ -36,6 +37,42 @@ describe('notificationBar permissions', function () {
       }).click('button=Deny')
   })
 
+  describe('Dapps', function () {
+    it('shows notification bar for Dapps', function * () {
+      let notificationUrl = Brave.server.url('Dapps.html')
+      yield this.app.client
+        .tabByIndex(0)
+        .loadUrl(notificationUrl)
+        .windowByUrl(Brave.browserWindowUrl)
+        .waitForExist(notificationBar)
+        .waitUntil(function () {
+          return this.getText(notificationBar).then((val) => {
+            return val.includes('Dapp')
+          })
+        }).click('button=No thanks')
+    })
+
+    it('does not show when prompt is dismissed', function * () {
+      let notificationUrl = Brave.server.url('Dapps.html')
+      yield this.app.client
+        .changeSetting(settings.METAMASK_PROMPT_DISMISSED, true)
+        .tabByIndex(0)
+        .loadUrl(notificationUrl)
+        .windowByUrl(Brave.browserWindowUrl)
+        .waitForElementCount(notificationBar, 0)
+    })
+
+    it('does not show when MetaMask is enabled', function * () {
+      let notificationUrl = Brave.server.url('Dapps.html')
+      yield this.app.client
+        .changeSetting(settings.METAMASK_ENABLED, true)
+        .tabByIndex(0)
+        .loadUrl(notificationUrl)
+        .windowByUrl(Brave.browserWindowUrl)
+        .waitForElementCount(notificationBar, 0)
+    })
+  })
+
   it('can deny permission request', function * () {
     yield this.app.client
       .tabByIndex(0)

test/fixtures/Dapps.html

@@ -0,0 +1,13 @@
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Dapps</title>
+</head>
+<body>
+  This page exposes a web3 object.
+  <div id="result"></div>
+  <script type="text/javascript">
+    window.web3 = {}
+  </script>
+</body>
+</html>