Merge pull request #533 from MetaMask/inpage-fixes

inpage and stream provider fixes

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Current Master
 
 - Fix various typos.
+- Make dapp-metamask connection more reliable
 
 ## 2.7.3 2016-07-29
 

app/scripts/contentscript.js

@@ -1,4 +1,4 @@
-const LocalMessageDuplexStream = require('./lib/local-message-stream.js')
+const LocalMessageDuplexStream = require('post-message-stream')
 const PortStream = require('./lib/port-stream.js')
 const ObjectMultiplex = require('./lib/obj-multiplex')
 const extension = require('./lib/extension')

app/scripts/inpage.js

@@ -1,7 +1,7 @@
 /*global Web3*/
 cleanContextForImports()
 require('web3/dist/web3.min.js')
-const LocalMessageDuplexStream = require('./lib/local-message-stream.js')
+const LocalMessageDuplexStream = require('post-message-stream')
 const setupDappAutoReload = require('./lib/auto-reload.js')
 const MetamaskInpageProvider = require('./lib/inpage-provider.js')
 restoreContextAfterImports()

app/scripts/lib/inpage-provider.js

@@ -1,9 +1,7 @@
-const HttpProvider = require('web3/lib/web3/httpprovider')
 const Streams = require('mississippi')
 const ObjectMultiplex = require('./obj-multiplex')
 const StreamProvider = require('web3-stream-provider')
 const RemoteStore = require('./remote-store.js').RemoteStore
-const MetamaskConfig = require('../config.js')
 
 module.exports = MetamaskInpageProvider
 
@@ -27,13 +25,6 @@ function MetamaskInpageProvider (connectionStream) {
   })
   self.publicConfigStore = publicConfigStore
 
-  // connect to sync provider
-  self.syncProvider = createSyncProvider(publicConfigStore.get('provider'))
-  // subscribe to publicConfig to update the syncProvider on change
-  publicConfigStore.subscribe(function (state) {
-    self.syncProvider = createSyncProvider(state.provider)
-  })
-
   // connect to async provider
   var asyncProvider = new StreamProvider()
   Streams.pipe(asyncProvider, multiStream.createStream('provider'), asyncProvider, function (err) {
@@ -48,9 +39,9 @@ function MetamaskInpageProvider (connectionStream) {
 
 MetamaskInpageProvider.prototype.send = function (payload) {
   const self = this
-  let selectedAddress
   
-  var result = null
+  let selectedAddress
+  let result = null
   switch (payload.method) {
 
     case 'eth_accounts':
@@ -65,9 +56,10 @@ MetamaskInpageProvider.prototype.send = function (payload) {
       result = selectedAddress || '0x0000000000000000000000000000000000000000'
       break
 
-    // fallback to normal rpc
+    // throw not-supported Error
     default:
-      return self.syncProvider.send(payload)
+      var message = 'The MetaMask Web3 object does not support synchronous methods. See https://github.com/MetaMask/faq/blob/master/DEVELOPERS.md#all-async---think-of-metamask-as-a-light-client for details.'
+      throw new Error(message)
 
   }
 
@@ -89,35 +81,6 @@ MetamaskInpageProvider.prototype.isConnected = function () {
 
 // util
 
-function createSyncProvider (providerConfig) {
-  providerConfig = providerConfig || {}
-  let syncProviderUrl
-
-  if (providerConfig.rpcTarget) {
-    syncProviderUrl = providerConfig.rpcTarget
-  } else {
-    switch (providerConfig.type) {
-      case 'testnet':
-        syncProviderUrl = MetamaskConfig.network.testnet
-        break
-      case 'mainnet':
-        syncProviderUrl = MetamaskConfig.network.mainnet
-        break
-      default:
-        syncProviderUrl = MetamaskConfig.network.default
-    }
-  }
-
-  const provider = new HttpProvider(syncProviderUrl)
-  // Stubbing out the send method to throw on sync methods:
-  provider.send = function() {
-    var message = 'The MetaMask Web3 object does not support synchronous methods. See https://github.com/MetaMask/faq#all-async---think-of-metamask-as-a-light-client for details.'
-    throw new Error(message)
-  }
-
-  return provider
-}
-
 function remoteStoreWithLocalStorageCache (storageKey) {
   // read local cache
   var initState = JSON.parse(localStorage[storageKey] || '{}')

app/scripts/lib/local-message-stream.js

@@ -1,56 +0,0 @@
-const Duplex = require('readable-stream').Duplex
-const inherits = require('util').inherits
-
-module.exports = LocalMessageDuplexStream
-
-inherits(LocalMessageDuplexStream, Duplex)
-
-function LocalMessageDuplexStream (opts) {
-  Duplex.call(this, {
-    objectMode: true,
-  })
-
-  // this._origin = opts.origin
-  this._name = opts.name
-  this._target = opts.target
-
-  // console.log('LocalMessageDuplexStream ('+this._name+') - initialized...')
-  window.addEventListener('message', this._onMessage.bind(this), false)
-}
-
-// private
-
-LocalMessageDuplexStream.prototype._onMessage = function (event) {
-  var msg = event.data
-  // console.log('LocalMessageDuplexStream ('+this._name+') - heard message...', event)
-  // validate message
-  if (event.origin !== location.origin) return // console.log('LocalMessageDuplexStream ('+this._name+') - rejected - (event.origin !== location.origin) ')
-  if (typeof msg !== 'object') return // console.log('LocalMessageDuplexStream ('+this._name+') - rejected - (typeof msg !== "object") ')
-  if (msg.target !== this._name) return // console.log('LocalMessageDuplexStream ('+this._name+') - rejected - (msg.target !== this._name) ', msg.target, this._name)
-  if (!msg.data) return // console.log('LocalMessageDuplexStream ('+this._name+') - rejected - (!msg.data) ')
-  // console.log('LocalMessageDuplexStream ('+this._name+') - accepted', msg.data)
-  // forward message
-  try {
-    this.push(msg.data)
-  } catch (err) {
-    this.emit('error', err)
-  }
-}
-
-// stream plumbing
-
-LocalMessageDuplexStream.prototype._read = noop
-
-LocalMessageDuplexStream.prototype._write = function (data, encoding, cb) {
-  // console.log('LocalMessageDuplexStream ('+this._name+') - sending message...')
-  var message = {
-    target: this._target,
-    data: data,
-  }
-  window.postMessage(message, location.origin)
-  cb()
-}
-
-// util
-
-function noop () {}

package.json

@@ -53,6 +53,7 @@
     "once": "^1.3.3",
     "pojo-migrator": "^2.1.0",
     "polyfill-crypto.getrandomvalues": "^1.0.0",
+    "post-message-stream": "^1.0.0",
     "pumpify": "^1.3.4",
     "react": "^15.0.2",
     "react-addons-css-transition-group": "^15.0.2",
@@ -72,7 +73,7 @@
     "vreme": "^3.0.2",
     "web3": "ethereum/web3.js#0.16.0",
     "web3-provider-engine": "^7.8.3",
-    "web3-stream-provider": "^2.0.5",
+    "web3-stream-provider": "^2.0.6",
     "xtend": "^4.0.1"
   },
   "devDependencies": {