inpage - use publicConfigStore for selectedAccount and sync provider

app/scripts/background.js

@@ -71,13 +71,6 @@ provider.on('block', function(block){
 var ethStore = new EthStore(provider)
 idStore.setStore(ethStore)
 
-// copy idStore substate into public store
-var publicConfigStore = new HostStore()
-idStore.on('update', function(state){
-  publicConfigStore.set('selectedAddress', state.selectedAddress)
-})
-
-
 function getState(){
   var state = extend(
     ethStore.getState(),
@@ -87,6 +80,47 @@ function getState(){
   return state
 }
 
+//
+// public store
+//
+
+// get init state
+var initPublicState = extend(
+  idStoreToPublic(idStore.getState()),
+  configToPublic(configManager.getConfig())
+)
+
+var publicConfigStore = new HostStore(initPublicState)
+
+// subscribe to changes
+configManager.subscribe(function(state){
+  storeSetFromObj(publicConfigStore, configToPublic(state))
+})
+idStore.on('update', function(state){
+  storeSetFromObj(publicConfigStore, idStoreToPublic(state))
+})
+
+// idStore substate
+function idStoreToPublic(state){
+  return {
+    selectedAddress: state.selectedAddress,
+  }
+}
+// config substate
+function configToPublic(state){
+  return {
+    provider: state.provider,
+  }
+}
+// dump obj into store
+function storeSetFromObj(store, obj){
+  Object.keys(obj).forEach(function(key){
+    store.set(key, obj[key])
+  })
+}
+
+
+
 // handle rpc requests
 function onRpcRequest(remoteStream, payload){
   // console.log('MetaMaskPlugin - incoming payload:', payload)

app/scripts/inpage.js

@@ -9,7 +9,7 @@ const Web3 = require('web3')
 delete window.Web3
 window.MetamaskWeb3 = Web3
 
-const RPC_URL = 'https://testrpc.metamask.io/'
+const DEFAULT_RPC_URL = 'https://rpc.metamask.io/'
 
 
 //
@@ -27,12 +27,13 @@ var remoteProvider = new StreamProvider()
 remoteProvider.pipe(mx.createStream('provider')).pipe(remoteProvider)
 remoteProvider.on('error', console.error.bind(console))
 
-var publicConfigStore = new RemoteStore()
+var initState = JSON.parse(localStorage['MetaMask-Config'] || '{}')
+var publicConfigStore = new RemoteStore(initState)
 var storeStream = publicConfigStore.createStream()
 storeStream.pipe(mx.createStream('publicConfig')).pipe(storeStream)
 
 publicConfigStore.subscribe(function(state){
-  console.log('store updated:', state)
+  localStorage['MetaMask-Config'] = JSON.stringify(state)
 })
 
 
@@ -52,42 +53,39 @@ console.log('MetaMask - injected web3')
 // handle synchronous requests
 //
 
-// handle accounts cache
-var accountsCache = JSON.parse(localStorage['MetaMask-Accounts'] || '[]')
-web3.eth.defaultAccount = accountsCache[0]
-
-setInterval(populateAccountsCache, 4000)
-function populateAccountsCache(){
-  remoteProvider.sendAsync(createPayload({
-    method: 'eth_accounts',
-    params: [],
-    isMetamaskInternal: true,
-  }), function(err, response){
-    if (err) return console.error('MetaMask - Error polling accounts')
-    // update localStorage
-    var accounts = response.result
-    if (accounts.toString() !== accountsCache.toString()) {
-      accountsCache = accounts
-      web3.eth.defaultAccount = accountsCache[0]
-      localStorage['MetaMask-Accounts'] = JSON.stringify(accounts)
-    }
+global.publicConfigStore = publicConfigStore
+
+// set web3 defaultAcount
+publicConfigStore.subscribe(function(state){
+  web3.eth.defaultAccount = state.selectedAddress
+})
+
+// setup sync http provider
+var providerConfig = publicConfigStore.get('provider') || {}
+var providerUrl = providerConfig.rpcTarget ? providerConfig.rpcTarget : DEFAULT_RPC_URL
+var syncProvider = new Web3.providers.HttpProvider(providerUrl)
+publicConfigStore.subscribe(function(state){
+  if (!state.provider) return
+  if (!state.provider.rpcTarget || state.provider.rpcTarget === providerUrl) return
+  providerUrl = state.provider.rpcTarget
+  syncProvider = new Web3.providers.HttpProvider(providerUrl)
 })
-}
 
-// handle synchronous methods via standard http provider
-var syncProvider = new Web3.providers.HttpProvider(RPC_URL)
+// handle sync methods
 remoteProvider.send = function(payload){
   var result = null
   switch (payload.method) {
 
     case 'eth_accounts':
       // read from localStorage
-      result = accountsCache
+      var selectedAddress = publicConfigStore.get('selectedAddress')
+      result = selectedAddress ? [selectedAddress] : []
       break
 
     case 'eth_coinbase':
       // read from localStorage
-      result = accountsCache[0] || '0x0000000000000000000000000000000000000000'
+      var selectedAddress = publicConfigStore.get('selectedAddress')
+      result = selectedAddress || '0x0000000000000000000000000000000000000000'
       break
 
     // fallback to normal rpc

app/scripts/lib/config-manager.js

@@ -15,6 +15,8 @@ const migrations = require('./migrations')
  */
 module.exports = ConfigManager
 function ConfigManager() {
+  // ConfigManager is observable and will emit updates
+  this._subs = []
 
   /* The migrator exported on the config-manager
    * has two methods the user should be concerned with:
@@ -47,6 +49,7 @@ ConfigManager.prototype.setConfig = function(config) {
   var data = this.migrator.getData()
   data.config = config
   this.setData(data)
+  this._emitUpdates(config)
 }
 
 ConfigManager.prototype.getConfig = function() {
@@ -127,6 +130,30 @@ ConfigManager.prototype.clearWallet = function() {
   this.setData(data)
 }
 
+ConfigManager.prototype.setData = function(data) {
+  this.migrator.saveData(data)
+}
+
+// observable
+
+ConfigManager.prototype.subscribe = function(fn){
+  this._subs.push(fn)
+  var unsubscribe = this.unsubscribe.bind(this, fn)
+  return unsubscribe
+}
+
+ConfigManager.prototype.unsubscribe = function(fn){
+  var index = this._subs.indexOf(fn)
+  if (index !== -1) this._subs.splice(index, 1)
+}
+
+ConfigManager.prototype._emitUpdates = function(state){
+  this._subs.forEach(function(handler){
+    handler(state)
+  })
+}
+
+
 function loadData() {
 
   var oldData = getOldStyleData()