Merge pull request #81 from MetaMask/MigratableConfig

Migratable config

3 files changed, 186 insertions, 22 deletions

diff --git a/app/scripts/lib/config-manager-singleton.js b/app/scripts/lib/config-manager-singleton.js
new file mode 100644
index 000000000..5915c401b
--- /dev/null
+++ b/app/scripts/lib/config-manager-singleton.js
@@ -0,0 +1,3 @@
+var ConfigManager = require('./config-manager')
+
+module.exports = new ConfigManager()
diff --git a/app/scripts/lib/config-manager.js b/app/scripts/lib/config-manager.js
new file mode 100644
index 000000000..682b34637
--- /dev/null
+++ b/app/scripts/lib/config-manager.js
@@ -0,0 +1,157 @@
+const Migrator = require('pojo-migrator')
+const extend = require('xtend')
+
+const STORAGE_KEY = 'metamask-config'
+var DEFAULT_RPC = 'https://rawtestrpc.metamask.io/'
+
+/* The config-manager is a convenience object
+ * wrapping a pojo-migrator.
+ *
+ * It exists mostly to allow the creation of
+ * convenience methods to access and persist
+ * particular portions of the state.
+ */
+module.exports = ConfigManager
+function ConfigManager() {
+
+  /* The migrator exported on the config-manager
+   * has two methods the user should be concerned with:
+   *
+   * getData(), which returns the app-consumable data object
+   * saveData(), which persists the app-consumable data object.
+   */
+  this.migrator =  new Migrator({
+
+    // Migrations must start at version 1 or later.
+    // They are objects with a `version` number
+    // and a `migrate` function.
+    //
+    // The `migrate` function receives the previous
+    // config data format, and returns the new one.
+    migrations: [],
+
+    // How to load initial config.
+    // Includes step on migrating pre-pojo-migrator data.
+    loadData: loadData,
+
+    // How to persist migrated config.
+    setData: function(data) {
+      window.localStorage[STORAGE_KEY] = JSON.stringify(data)
+    },
+  })
+}
+
+ConfigManager.prototype.setConfig = function(config) {
+  var data = this.migrator.getData()
+  data.config = config
+  this.setData(data)
+}
+
+ConfigManager.prototype.setRpcTarget = function(rpcUrl) {
+  var config = this.getConfig()
+  config.provider = {
+    type: 'rpc',
+    rpcTarget: rpcUrl,
+  }
+  this.setConfig(config)
+}
+
+ConfigManager.prototype.getConfig = function() {
+  var data = this.migrator.getData()
+  if ('config' in data) {
+    return data.config
+  } else {
+    return {
+      provider: {
+        type: 'rpc',
+        rpcTarget: DEFAULT_RPC,
+      }
+    }
+  }
+}
+
+ConfigManager.prototype.setData = function(data) {
+  this.migrator.saveData(data)
+}
+
+ConfigManager.prototype.getData = function() {
+  return this.migrator.getData()
+}
+
+ConfigManager.prototype.setWallet = function(wallet) {
+  var data = this.migrator.getData()
+  data.wallet = wallet
+  this.setData(data)
+}
+
+ConfigManager.prototype.getWallet = function() {
+  return this.migrator.getData().wallet
+}
+
+// Takes a boolean
+ConfigManager.prototype.setShowSeedWords = function(should) {
+  var data = this.migrator.getData()
+  data.showSeedWords = should
+  this.setData(data)
+}
+
+ConfigManager.prototype.getShouldShowSeedWords = function() {
+  var data = this.migrator.getData()
+  return data.showSeedWords
+}
+
+ConfigManager.prototype.getCurrentRpcAddress = function() {
+  var config = this.getConfig()
+  if (!config) return null
+  return config.provider && config.provider.rpcTarget ? config.provider.rpcTarget : DEFAULT_RPC
+}
+
+ConfigManager.prototype.clearWallet = function() {
+  var data = this.getConfig()
+  delete data.wallet
+  this.setData(data)
+}
+
+function loadData() {
+
+  var oldData = getOldStyleData()
+  var newData
+  try {
+    newData = JSON.parse(window.localStorage[STORAGE_KEY])
+  } catch (e) {}
+
+  var data = extend({
+    version: 0,
+    data: {
+      config: {
+        rpcTarget: DEFAULT_RPC,
+      }
+    }
+  }, oldData ? oldData : null, newData ? newData : null)
+  return data
+}
+
+function getOldStyleData() {
+  var config, wallet, seedWords
+
+  var result = {
+    meta: { version: 0 },
+    data: {},
+  }
+
+  try {
+    config = JSON.parse(window.localStorage['config'])
+    result.data.config = config
+  } catch (e) {}
+  try {
+    wallet = JSON.parse(window.localStorage['lightwallet'])
+    result.data.wallet = wallet
+  } catch (e) {}
+  try {
+    seedWords = window.localStorage['seedWords']
+    result.data.seedWords = seedWords
+  } catch (e) {}
+
+  return result
+}
+
diff --git a/app/scripts/lib/idStore.js b/app/scripts/lib/idStore.js
index ea873e627..1bc1ebcb2 100644
--- a/app/scripts/lib/idStore.js
+++ b/app/scripts/lib/idStore.js
@@ -8,6 +8,7 @@ const clone = require('clone')
 const extend = require('xtend')
 const createId = require('web3-provider-engine/util/random-id')
 const autoFaucet = require('./auto-faucet')
+const configManager = require('./config-manager-singleton')
 
 
 module.exports = IdentityStore
@@ -41,14 +42,16 @@ function IdentityStore(ethStore) {
 
 IdentityStore.prototype.createNewVault = function(password, entropy, cb){
   delete this._keyStore
-  delete window.localStorage['lightwallet']
+  configManager.clearWallet()
   this._createIdmgmt(password, null, entropy, (err) => {
     if (err) return cb(err)
-    var seedWords = this._idmgmt.getSeed()
-    this._cacheSeedWordsUntilConfirmed(seedWords)
+
     this._loadIdentities()
     this._didUpdate()
     this._autoFaucet()
+
+    configManager.setShowSeedWords(true)
+    var seedWords = this._idmgmt.getSeed()
     cb(null, seedWords)
   })
 }
@@ -68,19 +71,28 @@ IdentityStore.prototype.setStore = function(store){
 }
 
 IdentityStore.prototype.clearSeedWordCache = function(cb) {
-  delete window.localStorage['seedWords']
+  configManager.setShowSeedWords(false)
   cb()
 }
 
 IdentityStore.prototype.getState = function(){
-  const cachedSeeds = window.localStorage['seedWords']
+  var seedWords = this.getSeedIfUnlocked()
+  var wallet = configManager.getWallet()
   return clone(extend(this._currentState, {
-    isInitialized: !!window.localStorage['lightwallet'] && !cachedSeeds,
+    isInitialized: !!configManager.getWallet() && !seedWords,
     isUnlocked: this._isUnlocked(),
-    seedWords: cachedSeeds,
+    seedWords: seedWords,
   }))
 }
 
+IdentityStore.prototype.getSeedIfUnlocked = function() {
+  var showSeed = configManager.getShouldShowSeedWords()
+  var idmgmt = this._idmgmt
+  var shouldShow = showSeed && !!idmgmt
+  var seedWords = shouldShow ? idmgmt.getSeed() : null
+  return seedWords
+}
+
 IdentityStore.prototype.getSelectedAddress = function(){
   return this._currentState.selectedAddress
 }
@@ -181,10 +193,6 @@ IdentityStore.prototype._isUnlocked = function(){
   return result
 }
 
-IdentityStore.prototype._cacheSeedWordsUntilConfirmed = function(seedWords) {
-  window.localStorage['seedWords'] = seedWords
-}
-
 // load identities from keyStoreet
 IdentityStore.prototype._loadIdentities = function(){
   if (!this._isUnlocked()) throw new Error('not unlocked')
@@ -216,14 +224,14 @@ IdentityStore.prototype._createIdmgmt = function(password, seed, entropy, cb){
   var keyStore = null
   LightwalletKeyStore.deriveKeyFromPassword(password, (err, derivedKey) => {
     if (err) return cb(err)
-    var serializedKeystore = window.localStorage['lightwallet']
+    var serializedKeystore = configManager.getWallet()
 
     if (seed) {
       keyStore = this._restoreFromSeed(password, seed, derivedKey)
 
-    // returning user, recovering from localStorage
+    // returning user, recovering from storage
     } else if (serializedKeystore) {
-      keyStore = this._loadFromLocalStorage(serializedKeystore, derivedKey, cb)
+      keyStore = LightwalletKeyStore.deserialize(serializedKeystore)
       var isCorrect = keyStore.isDerivedKeyCorrect(derivedKey)
       if (!isCorrect) return cb(new Error('Lightwallet - password incorrect'))
 
@@ -249,15 +257,11 @@ IdentityStore.prototype._restoreFromSeed = function(password, seed, derivedKey)
   keyStore.setDefaultHdDerivationPath(this.hdPathString)
 
   keyStore.generateNewAddress(derivedKey, 3)
-  window.localStorage['lightwallet'] = keyStore.serialize()
-  console.log('restored from seed. saved to keystore localStorage')
+  configManager.setWallet(keyStore.serialize())
+  console.log('restored from seed. saved to keystore')
   return keyStore
 }
 
-IdentityStore.prototype._loadFromLocalStorage = function(serializedKeystore, derivedKey) {
-  return LightwalletKeyStore.deserialize(serializedKeystore)
-}
-
 IdentityStore.prototype._createFirstWallet = function(entropy, derivedKey) {
   var secretSeed = LightwalletKeyStore.generateRandomSeed(entropy)
   var keyStore = new LightwalletKeyStore(secretSeed, derivedKey, this.hdPathString)
@@ -265,8 +269,8 @@ IdentityStore.prototype._createFirstWallet = function(entropy, derivedKey) {
   keyStore.setDefaultHdDerivationPath(this.hdPathString)
 
   keyStore.generateNewAddress(derivedKey, 3)
-  window.localStorage['lightwallet'] = keyStore.serialize()
-  console.log('saved to keystore localStorage')
+  configManager.setWallet(keyStore.serialize())
+  console.log('saved to keystore')
   return keyStore
 }