Merge branch 'master' into new-currency-test

17 files changed, 745 insertions, 1113 deletions

diff --git a/app/scripts/background.js b/app/scripts/background.js
index 1b96d68b5..195881e15 100644
--- a/app/scripts/background.js
+++ b/app/scripts/background.js
@@ -114,7 +114,7 @@ function setupController (initState) {
   //
 
   updateBadge()
-  controller.txController.on('updateBadge', updateBadge)
+  controller.txController.on('update:badge', updateBadge)
   controller.messageManager.on('updateBadge', updateBadge)
   controller.personalMessageManager.on('updateBadge', updateBadge)
 
diff --git a/app/scripts/contentscript.js b/app/scripts/contentscript.js
index 90a0f1f22..b4708189e 100644
--- a/app/scripts/contentscript.js
+++ b/app/scripts/contentscript.js
@@ -42,16 +42,21 @@ function setupStreams () {
     name: 'contentscript',
     target: 'inpage',
   })
-  pageStream.on('error', console.error)
   const pluginPort = extension.runtime.connect({ name: 'contentscript' })
   const pluginStream = new PortStream(pluginPort)
-  pluginStream.on('error', console.error)
 
   // forward communication plugin->inpage
-  pageStream.pipe(pluginStream).pipe(pageStream)
+  pump(
+    pageStream,
+    pluginStream,
+    pageStream,
+    (err) => logStreamDisconnectWarning('MetaMask Contentscript Forwarding', err)
+  )
 
   // setup local multistream channels
   const mux = new ObjectMultiplex()
+  mux.setMaxListeners(25)
+
   pump(
     mux,
     pageStream,
diff --git a/app/scripts/controllers/balance.js b/app/scripts/controllers/balance.js
new file mode 100644
index 000000000..4fa4c78fe
--- /dev/null
+++ b/app/scripts/controllers/balance.js
@@ -0,0 +1,70 @@
+const ObservableStore = require('obs-store')
+const PendingBalanceCalculator = require('../lib/pending-balance-calculator')
+const BN = require('ethereumjs-util').BN
+
+class BalanceController {
+
+  constructor (opts = {}) {
+    const { address, accountTracker, txController, blockTracker } = opts
+    this.address = address
+    this.accountTracker = accountTracker
+    this.txController = txController
+    this.blockTracker = blockTracker
+
+    const initState = {
+      ethBalance: undefined,
+    }
+    this.store = new ObservableStore(initState)
+
+    this.balanceCalc = new PendingBalanceCalculator({
+      getBalance: () => this._getBalance(),
+      getPendingTransactions: this._getPendingTransactions.bind(this),
+    })
+
+    this._registerUpdates()
+  }
+
+  async updateBalance () {
+    const balance = await this.balanceCalc.getBalance()
+    this.store.updateState({
+      ethBalance: balance,
+    })
+  }
+
+  _registerUpdates () {
+    const update = this.updateBalance.bind(this)
+
+    this.txController.on('tx:status-update', (txId, status) => {
+      switch (status) {
+        case 'submitted':
+        case 'confirmed':
+        case 'failed':
+          update()
+          return
+        default:
+          return
+      }
+    })
+    this.accountTracker.store.subscribe(update)
+    this.blockTracker.on('block', update)
+  }
+
+  async _getBalance () {
+    const { accounts } = this.accountTracker.store.getState()
+    const entry = accounts[this.address]
+    const balance = entry.balance
+    return balance ? new BN(balance.substring(2), 16) : undefined
+  }
+
+  async _getPendingTransactions () {
+    const pending = this.txController.getFilteredTxList({
+      from: this.address,
+      status: 'submitted',
+      err: undefined,
+    })
+    return pending
+  }
+
+}
+
+module.exports = BalanceController
diff --git a/app/scripts/controllers/computed-balances.js b/app/scripts/controllers/computed-balances.js
new file mode 100644
index 000000000..2479e1b3a
--- /dev/null
+++ b/app/scripts/controllers/computed-balances.js
@@ -0,0 +1,66 @@
+const ObservableStore = require('obs-store')
+const extend = require('xtend')
+const BalanceController = require('./balance')
+
+class ComputedbalancesController {
+
+  constructor (opts = {}) {
+    const { accountTracker, txController, blockTracker } = opts
+    this.accountTracker = accountTracker
+    this.txController = txController
+    this.blockTracker = blockTracker
+
+    const initState = extend({
+      computedBalances: {},
+    }, opts.initState)
+    this.store = new ObservableStore(initState)
+    this.balances = {}
+
+    this._initBalanceUpdating()
+  }
+
+  updateAllBalances () {
+    for (let address in this.accountTracker.store.getState().accounts) {
+      this.balances[address].updateBalance()
+    }
+  }
+
+  _initBalanceUpdating () {
+    const store = this.accountTracker.store.getState()
+    this.addAnyAccountsFromStore(store)
+    this.accountTracker.store.subscribe(this.addAnyAccountsFromStore.bind(this))
+  }
+
+  addAnyAccountsFromStore(store) {
+    const balances = store.accounts
+
+    for (let address in balances) {
+      this.trackAddressIfNotAlready(address)
+    }
+  }
+
+  trackAddressIfNotAlready (address) {
+    const state = this.store.getState()
+    if (!(address in state.computedBalances)) {
+      this.trackAddress(address)
+    }
+  }
+
+  trackAddress (address) {
+    let updater = new BalanceController({
+      address,
+      accountTracker: this.accountTracker,
+      txController: this.txController,
+      blockTracker: this.blockTracker,
+    })
+    updater.store.subscribe((accountBalance) => {
+      let newState = this.store.getState()
+      newState.computedBalances[address] = accountBalance
+      this.store.updateState(newState)
+    })
+    this.balances[address] = updater
+    updater.updateBalance()
+  }
+}
+
+module.exports = ComputedbalancesController
diff --git a/app/scripts/controllers/network.js b/app/scripts/controllers/network.js
index 0a3e5e26b..2a17cdae8 100644
--- a/app/scripts/controllers/network.js
+++ b/app/scripts/controllers/network.js
@@ -4,66 +4,43 @@ const ObservableStore = require('obs-store')
 const ComposedStore = require('obs-store/lib/composed')
 const extend = require('xtend')
 const EthQuery = require('eth-query')
+const createEventEmitterProxy = require('../lib/events-proxy.js')
 const RPC_ADDRESS_LIST = require('../config.js').network
 const DEFAULT_RPC = RPC_ADDRESS_LIST['rinkeby']
 
 module.exports = class NetworkController extends EventEmitter {
   constructor (config) {
     super()
-    this.networkStore = new ObservableStore('loading')
     config.provider.rpcTarget = this.getRpcAddressForType(config.provider.type, config.provider)
+    this.networkStore = new ObservableStore('loading')
     this.providerStore = new ObservableStore(config.provider)
     this.store = new ComposedStore({ provider: this.providerStore, network: this.networkStore })
-    this._providerListeners = {}
+    this._proxy = createEventEmitterProxy()
 
     this.on('networkDidChange', this.lookupNetwork)
-    this.providerStore.subscribe((state) => this.switchNetwork({rpcUrl: state.rpcTarget}))
-  }
-
-  get provider () {
-    return this._proxy
-  }
-
-  set provider (provider) {
-    this._provider = provider
+    this.providerStore.subscribe((state) => this.switchNetwork({ rpcUrl: state.rpcTarget }))
   }
 
   initializeProvider (opts, providerContructor = MetaMaskProvider) {
-    this.providerInit = opts
-    this._provider = providerContructor(opts)
-    this._proxy = new Proxy(this._provider, {
-      get: (obj, name) => {
-        if (name === 'on') return this._on.bind(this)
-        return this._provider[name]
-      },
-      set: (obj, name, value) => {
-        this._provider[name] = value
-        return value
-      },
-    })
-    this.provider.on('block', this._logBlock.bind(this))
-    this.provider.on('error', this.verifyNetwork.bind(this))
-    this.ethQuery = new EthQuery(this.provider)
+    this._baseProviderParams = opts
+    const provider = providerContructor(opts)
+    this._setProvider(provider)
+    this._proxy.on('block', this._logBlock.bind(this))
+    this._proxy.on('error', this.verifyNetwork.bind(this))
+    this.ethQuery = new EthQuery(this._proxy)
     this.lookupNetwork()
-    return this.provider
+    return this._proxy
   }
 
-  switchNetwork (providerInit) {
+  switchNetwork (opts) {
     this.setNetworkState('loading')
-    const newInit = extend(this.providerInit, providerInit)
-    this.providerInit = newInit
-
-    this._provider.removeAllListeners()
-    this._provider.stop()
-    this.provider = MetaMaskProvider(newInit)
-    // apply the listners created by other controllers
-    Object.keys(this._providerListeners).forEach((key) => {
-      this._providerListeners[key].forEach((handler) => this._provider.addListener(key, handler))
-    })
+    const providerParams = extend(this._baseProviderParams, opts)
+    this._baseProviderParams = providerParams
+    const provider = MetaMaskProvider(providerParams)
+    this._setProvider(provider)
     this.emit('networkDidChange')
   }
 
-
   verifyNetwork () {
   // Check network when restoring connectivity:
     if (this.isNetworkLoading()) this.lookupNetwork()
@@ -117,14 +94,26 @@ module.exports = class NetworkController extends EventEmitter {
     return provider && provider.rpcTarget ? provider.rpcTarget : DEFAULT_RPC
   }
 
+  _setProvider (provider) {
+    // collect old block tracker events
+    const oldProvider = this._provider
+    let blockTrackerHandlers
+    if (oldProvider) {
+      // capture old block handlers
+      blockTrackerHandlers = oldProvider._blockTracker.proxyEventHandlers
+      // tear down
+      oldProvider.removeAllListeners()
+      oldProvider.stop()
+    }
+    // override block tracler
+    provider._blockTracker = createEventEmitterProxy(provider._blockTracker, blockTrackerHandlers)
+    // set as new provider
+    this._provider = provider
+    this._proxy.setTarget(provider)
+  }
+
   _logBlock (block) {
     log.info(`BLOCK CHANGED: #${block.number.toString('hex')} 0x${block.hash.toString('hex')}`)
     this.verifyNetwork()
   }
-
-  _on (event, handler) {
-    if (!this._providerListeners[event]) this._providerListeners[event] = []
-    this._providerListeners[event].push(handler)
-    this._provider.on(event, handler)
-  }
 }
diff --git a/app/scripts/controllers/preferences.js b/app/scripts/controllers/preferences.js
index e45224593..bc4848421 100644
--- a/app/scripts/controllers/preferences.js
+++ b/app/scripts/controllers/preferences.js
@@ -22,7 +22,7 @@ class PreferencesController {
     })
   }
 
-  getSelectedAddress (_address) {
+  getSelectedAddress () {
     return this.store.getState().selectedAddress
   }
 
diff --git a/app/scripts/controllers/transactions.js b/app/scripts/controllers/transactions.js
index fb3be6073..4f5c94675 100644
--- a/app/scripts/controllers/transactions.js
+++ b/app/scripts/controllers/transactions.js
@@ -1,86 +1,97 @@
 const EventEmitter = require('events')
-const extend = require('xtend')
 const ObservableStore = require('obs-store')
 const ethUtil = require('ethereumjs-util')
+const Transaction = require('ethereumjs-tx')
 const EthQuery = require('ethjs-query')
-const TxProviderUtil = require('../lib/tx-utils')
+const TransactionStateManger = require('../lib/tx-state-manager')
+const TxGasUtil = require('../lib/tx-gas-utils')
 const PendingTransactionTracker = require('../lib/pending-tx-tracker')
 const createId = require('../lib/random-id')
 const NonceTracker = require('../lib/nonce-tracker')
-const txStateHistoryHelper = require('../lib/tx-state-history-helper')
+
+/*
+  Transaction Controller is an aggregate of sub-controllers and trackers
+  composing them in a way to be exposed to the metamask controller
+    - txStateManager
+      responsible for the state of a transaction and
+      storing the transaction
+    - pendingTxTracker
+      watching blocks for transactions to be include
+      and emitting confirmed events
+    - txGasUtil
+      gas calculations and safety buffering
+    - nonceTracker
+      calculating nonces
+*/
 
 module.exports = class TransactionController extends EventEmitter {
   constructor (opts) {
     super()
-    this.store = new ObservableStore(extend({
-      transactions: [],
-    }, opts.initState))
-    this.memStore = new ObservableStore({})
     this.networkStore = opts.networkStore || new ObservableStore({})
     this.preferencesStore = opts.preferencesStore || new ObservableStore({})
-    this.txHistoryLimit = opts.txHistoryLimit
     this.provider = opts.provider
     this.blockTracker = opts.blockTracker
     this.signEthTx = opts.signTransaction
-    this.ethStore = opts.ethStore
+    this.accountTracker = opts.accountTracker
+
+    this.memStore = new ObservableStore({})
+    this.query = new EthQuery(this.provider)
+    this.txGasUtil = new TxGasUtil(this.provider)
 
+    this.txStateManager = new TransactionStateManger({
+      initState: opts.initState,
+      txHistoryLimit: opts.txHistoryLimit,
+      getNetwork: this.getNetwork.bind(this),
+    })
+    this.store = this.txStateManager.store
+    this.txStateManager.on('tx:status-update', this.emit.bind(this, 'tx:status-update'))
     this.nonceTracker = new NonceTracker({
       provider: this.provider,
-      getPendingTransactions: (address) => {
-        return this.getFilteredTxList({
-          from: address,
-          status: 'submitted',
-          err: undefined,
-        })
-      },
+      getPendingTransactions: this.txStateManager.getPendingTransactions.bind(this.txStateManager),
       getConfirmedTransactions: (address) => {
-        return this.getFilteredTxList({
+        return this.txStateManager.getFilteredTxList({
           from: address,
           status: 'confirmed',
           err: undefined,
         })
       },
-      giveUpOnTransaction: (txId) => {
-        const msg = `Gave up submitting after 3500 blocks un-mined.`
-        this.setTxStatusFailed(txId, msg)
-      },
     })
-    this.query = new EthQuery(this.provider)
-    this.txProviderUtil = new TxProviderUtil(this.provider)
 
     this.pendingTxTracker = new PendingTransactionTracker({
       provider: this.provider,
       nonceTracker: this.nonceTracker,
+      retryLimit: 3500, // Retry 3500 blocks, or about 1 day.
       getBalance: (address) => {
-        const account = this.ethStore.getState().accounts[address]
+        const account = this.accountTracker.store.getState().accounts[address]
         if (!account) return
         return account.balance
       },
-      publishTransaction: this.txProviderUtil.publishTransaction.bind(this.txProviderUtil),
-      getPendingTransactions: () => {
-        const network = this.getNetwork()
-        return this.getFilteredTxList({
-          status: 'submitted',
-          metamaskNetworkId: network,
-        })
-      },
+      publishTransaction: (rawTx) => this.query.sendRawTransaction(rawTx),
+      getPendingTransactions: this.txStateManager.getPendingTransactions.bind(this.txStateManager),
     })
 
-    this.pendingTxTracker.on('txWarning', this.updateTx.bind(this))
-    this.pendingTxTracker.on('txFailed', this.setTxStatusFailed.bind(this))
-    this.pendingTxTracker.on('txConfirmed', this.setTxStatusConfirmed.bind(this))
+    this.txStateManager.store.subscribe(() => this.emit('update:badge'))
 
-    this.blockTracker.on('rawBlock', this.pendingTxTracker.checkForTxInBlock.bind(this.pendingTxTracker))
+    this.pendingTxTracker.on('tx:warning', this.txStateManager.updateTx.bind(this.txStateManager))
+    this.pendingTxTracker.on('tx:failed', this.txStateManager.setTxStatusFailed.bind(this.txStateManager))
+    this.pendingTxTracker.on('tx:confirmed', this.txStateManager.setTxStatusConfirmed.bind(this.txStateManager))
+    this.pendingTxTracker.on('tx:retry', (txMeta) => {
+      if (!('retryCount' in txMeta)) txMeta.retryCount = 0
+      txMeta.retryCount++
+      this.txStateManager.updateTx(txMeta)
+    })
+
+    this.blockTracker.on('block', this.pendingTxTracker.checkForTxInBlock.bind(this.pendingTxTracker))
     // this is a little messy but until ethstore has been either
     // removed or redone this is to guard against the race condition
-    // where ethStore hasent been populated by the results yet
+    // where accountTracker hasent been populated by the results yet
     this.blockTracker.once('latest', () => {
       this.blockTracker.on('latest', this.pendingTxTracker.resubmitPendingTxs.bind(this.pendingTxTracker))
     })
     this.blockTracker.on('sync', this.pendingTxTracker.queryPendingTxs.bind(this.pendingTxTracker))
     // memstore is computed from a few different stores
     this._updateMemstore()
-    this.store.subscribe(() => this._updateMemstore())
+    this.txStateManager.store.subscribe(() => this._updateMemstore())
     this.networkStore.subscribe(() => this._updateMemstore())
     this.preferencesStore.subscribe(() => this._updateMemstore())
   }
@@ -97,98 +108,31 @@ module.exports = class TransactionController extends EventEmitter {
     return this.preferencesStore.getState().selectedAddress
   }
 
-  // Returns the number of txs for the current network.
-  getTxCount () {
-    return this.getTxList().length
-  }
-
-  // Returns the full tx list across all networks
-  getFullTxList () {
-    return this.store.getState().transactions
-  }
-
   getUnapprovedTxCount () {
-    return Object.keys(this.getUnapprovedTxList()).length
-  }
-
-  getPendingTxCount () {
-    return this.getTxsByMetaData('status', 'signed').length
+    return Object.keys(this.txStateManager.getUnapprovedTxList()).length
   }
 
-  // Returns the tx list
-  getTxList () {
-    const network = this.getNetwork()
-    const fullTxList = this.getFullTxList()
-    return this.getTxsByMetaData('metamaskNetworkId', network, fullTxList)
+  getPendingTxCount (account) {
+    return this.txStateManager.getPendingTransactions(account).length
   }
 
-  // gets tx by Id and returns it
-  getTx (txId) {
-    const txList = this.getTxList()
-    const txMeta = txList.find(txData => txData.id === txId)
-    return txMeta
-  }
-  getUnapprovedTxList () {
-    const txList = this.getTxList()
-    return txList.filter((txMeta) => txMeta.status === 'unapproved')
-    .reduce((result, tx) => {
-      result[tx.id] = tx
-      return result
-    }, {})
+  getFilteredTxList (opts) {
+    return this.txStateManager.getFilteredTxList(opts)
   }
 
-  updateTx (txMeta) {
-    // create txMeta snapshot for history
-    const currentState = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
-    // recover previous tx state obj
-    const previousState = txStateHistoryHelper.replayHistory(txMeta.history)
-    // generate history entry and add to history
-    const entry = txStateHistoryHelper.generateHistoryEntry(previousState, currentState)
-    txMeta.history.push(entry)
-
-    // commit txMeta to state
-    const txId = txMeta.id
-    const txList = this.getFullTxList()
-    const index = txList.findIndex(txData => txData.id === txId)
-    txList[index] = txMeta
-    this._saveTxList(txList)
-    this.emit('update')
+  getChainId () {
+    const networkState = this.networkStore.getState()
+    const getChainId = parseInt(networkState)
+    if (Number.isNaN(getChainId)) {
+      return 0
+    } else {
+      return getChainId
+    }
   }
 
   // Adds a tx to the txlist
   addTx (txMeta) {
-    // initialize history
-    txMeta.history = []
-    // capture initial snapshot of txMeta for history
-    const snapshot = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
-    txMeta.history.push(snapshot)
-
-    // checks if the length of the tx history is
-    // longer then desired persistence limit
-    // and then if it is removes only confirmed
-    // or rejected tx's.
-    // not tx's that are pending or unapproved
-    const txCount = this.getTxCount()
-    const network = this.getNetwork()
-    const fullTxList = this.getFullTxList()
-    const txHistoryLimit = this.txHistoryLimit
-
-    if (txCount > txHistoryLimit - 1) {
-      const index = fullTxList.findIndex((metaTx) => ((metaTx.status === 'confirmed' || metaTx.status === 'rejected') && network === txMeta.metamaskNetworkId))
-      fullTxList.splice(index, 1)
-    }
-    fullTxList.push(txMeta)
-    this._saveTxList(fullTxList)
-    this.emit('update')
-
-    this.once(`${txMeta.id}:signed`, function (txId) {
-      this.removeAllListeners(`${txMeta.id}:rejected`)
-    })
-    this.once(`${txMeta.id}:rejected`, function (txId) {
-      this.removeAllListeners(`${txMeta.id}:signed`)
-    })
-
-    this.emit('updateBadge')
+    this.txStateManager.addTx(txMeta)
     this.emit(`${txMeta.id}:unapproved`, txMeta)
   }
 
@@ -198,7 +142,7 @@ module.exports = class TransactionController extends EventEmitter {
     this.emit('newUnaprovedTx', txMeta)
     // listen for tx completion (success, fail)
     return new Promise((resolve, reject) => {
-      this.once(`${txMeta.id}:finished`, (completedTx) => {
+      this.txStateManager.once(`${txMeta.id}:finished`, (completedTx) => {
         switch (completedTx.status) {
           case 'submitted':
             return resolve(completedTx.hash)
@@ -213,7 +157,7 @@ module.exports = class TransactionController extends EventEmitter {
 
   async addUnapprovedTransaction (txParams) {
     // validate
-    await this.txProviderUtil.validateTxParams(txParams)
+    await this.txGasUtil.validateTxParams(txParams)
     // construct txMeta
     const txMeta = {
       id: createId(),
@@ -232,17 +176,15 @@ module.exports = class TransactionController extends EventEmitter {
   async addTxDefaults (txMeta) {
     const txParams = txMeta.txParams
     // ensure value
+    const gasPrice = txParams.gasPrice || await this.query.gasPrice()
     txParams.value = txParams.value || '0x0'
-    if (!txParams.gasPrice) {
-      const gasPrice = await this.query.gasPrice()
-      txParams.gasPrice = gasPrice
-    }
+    txParams.gasPrice = ethUtil.addHexPrefix(gasPrice.toString(16))
     // set gasLimit
-    return await this.txProviderUtil.analyzeGasUsage(txMeta)
+    return await this.txGasUtil.analyzeGasUsage(txMeta)
   }
 
   async updateAndApproveTransaction (txMeta) {
-    this.updateTx(txMeta)
+    this.txStateManager.updateTx(txMeta)
     await this.approveTransaction(txMeta.id)
   }
 
@@ -250,24 +192,24 @@ module.exports = class TransactionController extends EventEmitter {
     let nonceLock
     try {
       // approve
-      this.setTxStatusApproved(txId)
+      this.txStateManager.setTxStatusApproved(txId)
       // get next nonce
-      const txMeta = this.getTx(txId)
+      const txMeta = this.txStateManager.getTx(txId)
       const fromAddress = txMeta.txParams.from
       // wait for a nonce
       nonceLock = await this.nonceTracker.getNonceLock(fromAddress)
       // add nonce to txParams
-      txMeta.txParams.nonce = nonceLock.nextNonce
+      txMeta.txParams.nonce = ethUtil.addHexPrefix(nonceLock.nextNonce.toString(16))
       // add nonce debugging information to txMeta
       txMeta.nonceDetails = nonceLock.nonceDetails
-      this.updateTx(txMeta)
+      this.txStateManager.updateTx(txMeta)
       // sign transaction
       const rawTx = await this.signTransaction(txId)
       await this.publishTransaction(txId, rawTx)
       // must set transaction to submitted/failed before releasing lock
       nonceLock.releaseLock()
     } catch (err) {
-      this.setTxStatusFailed(txId, err)
+      this.txStateManager.setTxStatusFailed(txId, err)
       // must set transaction to submitted/failed before releasing lock
       if (nonceLock) nonceLock.releaseLock()
       // continue with error chain
@@ -276,180 +218,46 @@ module.exports = class TransactionController extends EventEmitter {
   }
 
   async signTransaction (txId) {
-    const txMeta = this.getTx(txId)
+    const txMeta = this.txStateManager.getTx(txId)
     const txParams = txMeta.txParams
     const fromAddress = txParams.from
     // add network/chain id
-    txParams.chainId = this.getChainId()
-    const ethTx = this.txProviderUtil.buildEthTxFromParams(txParams)
+    txParams.chainId = ethUtil.addHexPrefix(this.getChainId().toString(16))
+    const ethTx = new Transaction(txParams)
     await this.signEthTx(ethTx, fromAddress)
-    this.setTxStatusSigned(txMeta.id)
+    this.txStateManager.setTxStatusSigned(txMeta.id)
     const rawTx = ethUtil.bufferToHex(ethTx.serialize())
     return rawTx
   }
 
   async publishTransaction (txId, rawTx) {
-    const txMeta = this.getTx(txId)
+    const txMeta = this.txStateManager.getTx(txId)
     txMeta.rawTx = rawTx
-    this.updateTx(txMeta)
-    const txHash = await this.txProviderUtil.publishTransaction(rawTx)
+    this.txStateManager.updateTx(txMeta)
+    const txHash = await this.query.sendRawTransaction(rawTx)
     this.setTxHash(txId, txHash)
-    this.setTxStatusSubmitted(txId)
+    this.txStateManager.setTxStatusSubmitted(txId)
   }
 
   async cancelTransaction (txId) {
-    this.setTxStatusRejected(txId)
-  }
-
-
-  getChainId () {
-    const networkState = this.networkStore.getState()
-    const getChainId = parseInt(networkState)
-    if (Number.isNaN(getChainId)) {
-      return 0
-    } else {
-      return getChainId
-    }
+    this.txStateManager.setTxStatusRejected(txId)
   }
 
   // receives a txHash records the tx as signed
   setTxHash (txId, txHash) {
     // Add the tx hash to the persisted meta-tx object
-    const txMeta = this.getTx(txId)
+    const txMeta = this.txStateManager.getTx(txId)
     txMeta.hash = txHash
-    this.updateTx(txMeta)
-  }
-
-  /*
-  Takes an object of fields to search for eg:
-  let thingsToLookFor = {
-    to: '0x0..',
-    from: '0x0..',
-    status: 'signed',
-    err: undefined,
-  }
-  and returns a list of tx with all
-  options matching
-
-  ****************HINT****************
-  | `err: undefined` is like looking |
-  | for a tx with no err             |
-  | so you can also search txs that  |
-  | dont have something as well by   |
-  | setting the value as undefined   |
-  ************************************
-
-  this is for things like filtering a the tx list
-  for only tx's from 1 account
-  or for filltering for all txs from one account
-  and that have been 'confirmed'
-  */
-  getFilteredTxList (opts) {
-    let filteredTxList
-    Object.keys(opts).forEach((key) => {
-      filteredTxList = this.getTxsByMetaData(key, opts[key], filteredTxList)
-    })
-    return filteredTxList
-  }
-
-  getTxsByMetaData (key, value, txList = this.getTxList()) {
-    return txList.filter((txMeta) => {
-      if (txMeta.txParams[key]) {
-        return txMeta.txParams[key] === value
-      } else {
-        return txMeta[key] === value
-      }
-    })
-  }
-
-  // STATUS METHODS
-  // get::set status
-
-  // should return the status of the tx.
-  getTxStatus (txId) {
-    const txMeta = this.getTx(txId)
-    return txMeta.status
+    this.txStateManager.updateTx(txMeta)
   }
 
-  // should update the status of the tx to 'rejected'.
-  setTxStatusRejected (txId) {
-    this._setTxStatus(txId, 'rejected')
-  }
-
-  // should update the status of the tx to 'approved'.
-  setTxStatusApproved (txId) {
-    this._setTxStatus(txId, 'approved')
-  }
-
-  // should update the status of the tx to 'signed'.
-  setTxStatusSigned (txId) {
-    this._setTxStatus(txId, 'signed')
-  }
-
-  // should update the status of the tx to 'submitted'.
-  setTxStatusSubmitted (txId) {
-    this._setTxStatus(txId, 'submitted')
-  }
-
-  // should update the status of the tx to 'confirmed'.
-  setTxStatusConfirmed (txId) {
-    this._setTxStatus(txId, 'confirmed')
-  }
-
-  setTxStatusFailed (txId, err) {
-    const txMeta = this.getTx(txId)
-    txMeta.err = {
-      message: err.toString(),
-      stack: err.stack,
-    }
-    this.updateTx(txMeta)
-    this._setTxStatus(txId, 'failed')
-  }
-
-  // merges txParams obj onto txData.txParams
-  // use extend to ensure that all fields are filled
-  updateTxParams (txId, txParams) {
-    const txMeta = this.getTx(txId)
-    txMeta.txParams = extend(txMeta.txParams, txParams)
-    this.updateTx(txMeta)
-  }
-
-/* _____________________________________
-|                                      |
-|           PRIVATE METHODS            |
-|______________________________________*/
-
-
-  //  Should find the tx in the tx list and
-  //  update it.
-  //  should set the status in txData
-  //    - `'unapproved'` the user has not responded
-  //    - `'rejected'` the user has responded no!
-  //    - `'approved'` the user has approved the tx
-  //    - `'signed'` the tx is signed
-  //    - `'submitted'` the tx is sent to a server
-  //    - `'confirmed'` the tx has been included in a block.
-  //    - `'failed'` the tx failed for some reason, included on tx data.
-  _setTxStatus (txId, status) {
-    const txMeta = this.getTx(txId)
-    txMeta.status = status
-    this.emit(`${txMeta.id}:${status}`, txId)
-    if (status === 'submitted' || status === 'rejected') {
-      this.emit(`${txMeta.id}:finished`, txMeta)
-    }
-    this.updateTx(txMeta)
-    this.emit('updateBadge')
-  }
-
-  // Saves the new/updated txList.
-  // Function is intended only for internal use
-  _saveTxList (transactions) {
-    this.store.updateState({ transactions })
-  }
+//
+//           PRIVATE METHODS
+//
 
   _updateMemstore () {
-    const unapprovedTxs = this.getUnapprovedTxList()
-    const selectedAddressTxList = this.getFilteredTxList({
+    const unapprovedTxs = this.txStateManager.getUnapprovedTxList()
+    const selectedAddressTxList = this.txStateManager.getFilteredTxList({
       from: this.getSelectedAddress(),
       metamaskNetworkId: this.getNetwork(),
     })
diff --git a/app/scripts/keyring-controller.js b/app/scripts/keyring-controller.js
deleted file mode 100644
index adfa4a813..000000000
--- a/app/scripts/keyring-controller.js
+++ /dev/null
@@ -1,595 +0,0 @@
-const ethUtil = require('ethereumjs-util')
-const BN = ethUtil.BN
-const bip39 = require('bip39')
-const EventEmitter = require('events').EventEmitter
-const ObservableStore = require('obs-store')
-const filter = require('promise-filter')
-const encryptor = require('browser-passworder')
-const sigUtil = require('eth-sig-util')
-const normalizeAddress = sigUtil.normalize
-// Keyrings:
-const SimpleKeyring = require('eth-simple-keyring')
-const HdKeyring = require('eth-hd-keyring')
-const keyringTypes = [
-  SimpleKeyring,
-  HdKeyring,
-]
-
-class KeyringController extends EventEmitter {
-
-  // PUBLIC METHODS
-  //
-  // THE FIRST SECTION OF METHODS ARE PUBLIC-FACING,
-  // MEANING THEY ARE USED BY CONSUMERS OF THIS CLASS.
-  //
-  // THEIR SURFACE AREA SHOULD BE CHANGED WITH GREAT CARE.
-
-  constructor (opts) {
-    super()
-    const initState = opts.initState || {}
-    this.keyringTypes = keyringTypes
-    this.store = new ObservableStore(initState)
-    this.memStore = new ObservableStore({
-      isUnlocked: false,
-      keyringTypes: this.keyringTypes.map(krt => krt.type),
-      keyrings: [],
-      identities: {},
-    })
-    this.ethStore = opts.ethStore
-    this.encryptor = opts.encryptor || encryptor
-    this.keyrings = []
-    this.getNetwork = opts.getNetwork
-  }
-
-  // Full Update
-  // returns Promise( @object state )
-  //
-  // Emits the `update` event and
-  // returns a Promise that resolves to the current state.
-  //
-  // Frequently used to end asynchronous chains in this class,
-  // indicating consumers can often either listen for updates,
-  // or accept a state-resolving promise to consume their results.
-  //
-  // Not all methods end with this, that might be a nice refactor.
-  fullUpdate () {
-    this.emit('update')
-    return Promise.resolve(this.memStore.getState())
-  }
-
-  // Create New Vault And Keychain
-  // @string password - The password to encrypt the vault with
-  //
-  // returns Promise( @object state )
-  //
-  // Destroys any old encrypted storage,
-  // creates a new encrypted store with the given password,
-  // randomly creates a new HD wallet with 1 account,
-  // faucets that account on the testnet.
-  createNewVaultAndKeychain (password) {
-    return this.persistAllKeyrings(password)
-    .then(this.createFirstKeyTree.bind(this))
-    .then(this.fullUpdate.bind(this))
-  }
-
-  // CreateNewVaultAndRestore
-  // @string password - The password to encrypt the vault with
-  // @string seed - The BIP44-compliant seed phrase.
-  //
-  // returns Promise( @object state )
-  //
-  // Destroys any old encrypted storage,
-  // creates a new encrypted store with the given password,
-  // creates a new HD wallet from the given seed with 1 account.
-  createNewVaultAndRestore (password, seed) {
-    if (typeof password !== 'string') {
-      return Promise.reject('Password must be text.')
-    }
-
-    if (!bip39.validateMnemonic(seed)) {
-      return Promise.reject(new Error('Seed phrase is invalid.'))
-    }
-
-    this.clearKeyrings()
-
-    return this.persistAllKeyrings(password)
-    .then(() => {
-      return this.addNewKeyring('HD Key Tree', {
-        mnemonic: seed,
-        numberOfAccounts: 1,
-      })
-    })
-    .then((firstKeyring) => {
-      return firstKeyring.getAccounts()
-    })
-    .then((accounts) => {
-      const firstAccount = accounts[0]
-      if (!firstAccount) throw new Error('KeyringController - First Account not found.')
-      const hexAccount = normalizeAddress(firstAccount)
-      this.emit('newAccount', hexAccount)
-      return this.setupAccounts(accounts)
-    })
-    .then(this.persistAllKeyrings.bind(this, password))
-    .then(this.fullUpdate.bind(this))
-  }
-
-  // Set Locked
-  // returns Promise( @object state )
-  //
-  // This method deallocates all secrets, and effectively locks metamask.
-  setLocked () {
-    // set locked
-    this.password = null
-    this.memStore.updateState({ isUnlocked: false })
-    // remove keyrings
-    this.keyrings = []
-    this._updateMemStoreKeyrings()
-    return this.fullUpdate()
-  }
-
-  // Submit Password
-  // @string password
-  //
-  // returns Promise( @object state )
-  //
-  // Attempts to decrypt the current vault and load its keyrings
-  // into memory.
-  //
-  // Temporarily also migrates any old-style vaults first, as well.
-  // (Pre MetaMask 3.0.0)
-  submitPassword (password) {
-    return this.unlockKeyrings(password)
-    .then((keyrings) => {
-      this.keyrings = keyrings
-      return this.fullUpdate()
-    })
-  }
-
-  // Add New Keyring
-  // @string type
-  // @object opts
-  //
-  // returns Promise( @Keyring keyring )
-  //
-  // Adds a new Keyring of the given `type` to the vault
-  // and the current decrypted Keyrings array.
-  //
-  // All Keyring classes implement a unique `type` string,
-  // and this is used to retrieve them from the keyringTypes array.
-  addNewKeyring (type, opts) {
-    const Keyring = this.getKeyringClassForType(type)
-    const keyring = new Keyring(opts)
-    return keyring.deserialize(opts)
-    .then(() => {
-      return keyring.getAccounts()
-    })
-    .then((accounts) => {
-      return this.checkForDuplicate(type, accounts)
-    })
-    .then((checkedAccounts) => {
-      this.keyrings.push(keyring)
-      return this.setupAccounts(checkedAccounts)
-    })
-    .then(() => this.persistAllKeyrings())
-    .then(() => this._updateMemStoreKeyrings())
-    .then(() => this.fullUpdate())
-    .then(() => {
-      return keyring
-    })
-  }
-
-  // For now just checks for simple key pairs
-  // but in the future
-  // should possibly add HD and other types
-  //
-  checkForDuplicate (type, newAccount) {
-    return this.getAccounts()
-    .then((accounts) => {
-      switch (type) {
-        case 'Simple Key Pair':
-          const isNotIncluded = !accounts.find((key) => key === newAccount[0] || key === ethUtil.stripHexPrefix(newAccount[0]))
-          return (isNotIncluded) ? Promise.resolve(newAccount) : Promise.reject(new Error('The account you\'re are trying to import is a duplicate'))
-        default:
-          return Promise.resolve(newAccount)
-      }
-    })
-  }
-
-
-  // Add New Account
-  // @number keyRingNum
-  //
-  // returns Promise( @object state )
-  //
-  // Calls the `addAccounts` method on the Keyring
-  // in the kryings array at index `keyringNum`,
-  // and then saves those changes.
-  addNewAccount (selectedKeyring) {
-    return selectedKeyring.addAccounts(1)
-    .then(this.setupAccounts.bind(this))
-    .then(this.persistAllKeyrings.bind(this))
-    .then(this._updateMemStoreKeyrings.bind(this))
-    .then(this.fullUpdate.bind(this))
-  }
-
-  // Save Account Label
-  // @string account
-  // @string label
-  //
-  // returns Promise( @string label )
-  //
-  // Persists a nickname equal to `label` for the specified account.
-  saveAccountLabel (account, label) {
-    try {
-      const hexAddress = normalizeAddress(account)
-      // update state on diskStore
-      const state = this.store.getState()
-      const walletNicknames = state.walletNicknames || {}
-      walletNicknames[hexAddress] = label
-      this.store.updateState({ walletNicknames })
-      // update state on memStore
-      const identities = this.memStore.getState().identities
-      identities[hexAddress].name = label
-      this.memStore.updateState({ identities })
-      return Promise.resolve(label)
-    } catch (err) {
-      return Promise.reject(err)
-    }
-  }
-
-  // Export Account
-  // @string address
-  //
-  // returns Promise( @string privateKey )
-  //
-  // Requests the private key from the keyring controlling
-  // the specified address.
-  //
-  // Returns a Promise that may resolve with the private key string.
-  exportAccount (address) {
-    try {
-      return this.getKeyringForAccount(address)
-      .then((keyring) => {
-        return keyring.exportAccount(normalizeAddress(address))
-      })
-    } catch (e) {
-      return Promise.reject(e)
-    }
-  }
-
-
-  // SIGNING METHODS
-  //
-  // This method signs tx and returns a promise for
-  // TX Manager to update the state after signing
-
-  signTransaction (ethTx, _fromAddress) {
-    const fromAddress = normalizeAddress(_fromAddress)
-    return this.getKeyringForAccount(fromAddress)
-    .then((keyring) => {
-      return keyring.signTransaction(fromAddress, ethTx)
-    })
-  }
-
-  // Sign Message
-  // @object msgParams
-  //
-  // returns Promise(@buffer rawSig)
-  //
-  // Attempts to sign the provided @object msgParams.
-  signMessage (msgParams) {
-    const address = normalizeAddress(msgParams.from)
-    return this.getKeyringForAccount(address)
-    .then((keyring) => {
-      return keyring.signMessage(address, msgParams.data)
-    })
-  }
-
-  // Sign Personal Message
-  // @object msgParams
-  //
-  // returns Promise(@buffer rawSig)
-  //
-  // Attempts to sign the provided @object msgParams.
-  // Prefixes the hash before signing as per the new geth behavior.
-  signPersonalMessage (msgParams) {
-    const address = normalizeAddress(msgParams.from)
-    return this.getKeyringForAccount(address)
-    .then((keyring) => {
-      return keyring.signPersonalMessage(address, msgParams.data)
-    })
-  }
-
-  // PRIVATE METHODS
-  //
-  // THESE METHODS ARE ONLY USED INTERNALLY TO THE KEYRING-CONTROLLER
-  // AND SO MAY BE CHANGED MORE LIBERALLY THAN THE ABOVE METHODS.
-
-  // Create First Key Tree
-  // returns @Promise
-  //
-  // Clears the vault,
-  // creates a new one,
-  // creates a random new HD Keyring with 1 account,
-  // makes that account the selected account,
-  // faucets that account on testnet,
-  // puts the current seed words into the state tree.
-  createFirstKeyTree () {
-    this.clearKeyrings()
-    return this.addNewKeyring('HD Key Tree', { numberOfAccounts: 1 })
-    .then((keyring) => {
-      return keyring.getAccounts()
-    })
-    .then((accounts) => {
-      const firstAccount = accounts[0]
-      if (!firstAccount) throw new Error('KeyringController - No account found on keychain.')
-      const hexAccount = normalizeAddress(firstAccount)
-      this.emit('newAccount', hexAccount)
-      this.emit('newVault', hexAccount)
-      return this.setupAccounts(accounts)
-    })
-    .then(this.persistAllKeyrings.bind(this))
-  }
-
-  // Setup Accounts
-  // @array accounts
-  //
-  // returns @Promise(@object account)
-  //
-  // Initializes the provided account array
-  // Gives them numerically incremented nicknames,
-  // and adds them to the ethStore for regular balance checking.
-  setupAccounts (accounts) {
-    return this.getAccounts()
-    .then((loadedAccounts) => {
-      const arr = accounts || loadedAccounts
-      return Promise.all(arr.map((account) => {
-        return this.getBalanceAndNickname(account)
-      }))
-    })
-  }
-
-  // Get Balance And Nickname
-  // @string account
-  //
-  // returns Promise( @string label )
-  //
-  // Takes an account address and an iterator representing
-  // the current number of named accounts.
-  getBalanceAndNickname (account) {
-    if (!account) {
-      throw new Error('Problem loading account.')
-    }
-    const address = normalizeAddress(account)
-    this.ethStore.addAccount(address)
-    return this.createNickname(address)
-  }
-
-  // Create Nickname
-  // @string address
-  //
-  // returns Promise( @string label )
-  //
-  // Takes an address, and assigns it an incremented nickname, persisting it.
-  createNickname (address) {
-    const hexAddress = normalizeAddress(address)
-    const identities = this.memStore.getState().identities
-    const currentIdentityCount = Object.keys(identities).length + 1
-    const nicknames = this.store.getState().walletNicknames || {}
-    const existingNickname = nicknames[hexAddress]
-    const name = existingNickname || `Account ${currentIdentityCount}`
-    identities[hexAddress] = {
-      address: hexAddress,
-      name,
-    }
-    this.memStore.updateState({ identities })
-    return this.saveAccountLabel(hexAddress, name)
-  }
-
-  // Persist All Keyrings
-  // @password string
-  //
-  // returns Promise
-  //
-  // Iterates the current `keyrings` array,
-  // serializes each one into a serialized array,
-  // encrypts that array with the provided `password`,
-  // and persists that encrypted string to storage.
-  persistAllKeyrings (password = this.password) {
-    if (typeof password === 'string') {
-      this.password = password
-      this.memStore.updateState({ isUnlocked: true })
-    }
-    return Promise.all(this.keyrings.map((keyring) => {
-      return Promise.all([keyring.type, keyring.serialize()])
-      .then((serializedKeyringArray) => {
-        // Label the output values on each serialized Keyring:
-        return {
-          type: serializedKeyringArray[0],
-          data: serializedKeyringArray[1],
-        }
-      })
-    }))
-    .then((serializedKeyrings) => {
-      return this.encryptor.encrypt(this.password, serializedKeyrings)
-    })
-    .then((encryptedString) => {
-      this.store.updateState({ vault: encryptedString })
-      return true
-    })
-  }
-
-  // Unlock Keyrings
-  // @string password
-  //
-  // returns Promise( @array keyrings )
-  //
-  // Attempts to unlock the persisted encrypted storage,
-  // initializing the persisted keyrings to RAM.
-  unlockKeyrings (password) {
-    const encryptedVault = this.store.getState().vault
-    if (!encryptedVault) {
-      throw new Error('Cannot unlock without a previous vault.')
-    }
-
-    return this.encryptor.decrypt(password, encryptedVault)
-    .then((vault) => {
-      this.password = password
-      this.memStore.updateState({ isUnlocked: true })
-      vault.forEach(this.restoreKeyring.bind(this))
-      return this.keyrings
-    })
-  }
-
-  // Restore Keyring
-  // @object serialized
-  //
-  // returns Promise( @Keyring deserialized )
-  //
-  // Attempts to initialize a new keyring from the provided
-  // serialized payload.
-  //
-  // On success, returns the resulting @Keyring instance.
-  restoreKeyring (serialized) {
-    const { type, data } = serialized
-
-    const Keyring = this.getKeyringClassForType(type)
-    const keyring = new Keyring()
-    return keyring.deserialize(data)
-    .then(() => {
-      return keyring.getAccounts()
-    })
-    .then((accounts) => {
-      return this.setupAccounts(accounts)
-    })
-    .then(() => {
-      this.keyrings.push(keyring)
-      this._updateMemStoreKeyrings()
-      return keyring
-    })
-  }
-
-  // Get Keyring Class For Type
-  // @string type
-  //
-  // Returns @class Keyring
-  //
-  // Searches the current `keyringTypes` array
-  // for a Keyring class whose unique `type` property
-  // matches the provided `type`,
-  // returning it if it exists.
-  getKeyringClassForType (type) {
-    return this.keyringTypes.find(kr => kr.type === type)
-  }
-
-  getKeyringsByType (type) {
-    return this.keyrings.filter((keyring) => keyring.type === type)
-  }
-
-  // Get Accounts
-  // returns Promise( @Array[ @string accounts ] )
-  //
-  // Returns the public addresses of all current accounts
-  // managed by all currently unlocked keyrings.
-  getAccounts () {
-    const keyrings = this.keyrings || []
-    return Promise.all(keyrings.map(kr => kr.getAccounts()))
-    .then((keyringArrays) => {
-      return keyringArrays.reduce((res, arr) => {
-        return res.concat(arr)
-      }, [])
-    })
-  }
-
-  // Get Keyring For Account
-  // @string address
-  //
-  // returns Promise(@Keyring keyring)
-  //
-  // Returns the currently initialized keyring that manages
-  // the specified `address` if one exists.
-  getKeyringForAccount (address) {
-    const hexed = normalizeAddress(address)
-    log.debug(`KeyringController - getKeyringForAccount: ${hexed}`)
-
-    return Promise.all(this.keyrings.map((keyring) => {
-      return Promise.all([
-        keyring,
-        keyring.getAccounts(),
-      ])
-    }))
-    .then(filter((candidate) => {
-      const accounts = candidate[1].map(normalizeAddress)
-      return accounts.includes(hexed)
-    }))
-    .then((winners) => {
-      if (winners && winners.length > 0) {
-        return winners[0][0]
-      } else {
-        throw new Error('No keyring found for the requested account.')
-      }
-    })
-  }
-
-  // Display For Keyring
-  // @Keyring keyring
-  //
-  // returns Promise( @Object { type:String, accounts:Array } )
-  //
-  // Is used for adding the current keyrings to the state object.
-  displayForKeyring (keyring) {
-    return keyring.getAccounts()
-    .then((accounts) => {
-      return {
-        type: keyring.type,
-        accounts: accounts,
-      }
-    })
-  }
-
-  // Add Gas Buffer
-  // @string gas (as hexadecimal value)
-  //
-  // returns @string bufferedGas (as hexadecimal value)
-  //
-  // Adds a healthy buffer of gas to an initial gas estimate.
-  addGasBuffer (gas) {
-    const gasBuffer = new BN('100000', 10)
-    const bnGas = new BN(ethUtil.stripHexPrefix(gas), 16)
-    const correct = bnGas.add(gasBuffer)
-    return ethUtil.addHexPrefix(correct.toString(16))
-  }
-
-  // Clear Keyrings
-  //
-  // Deallocates all currently managed keyrings and accounts.
-  // Used before initializing a new vault.
-  clearKeyrings () {
-    let accounts
-    try {
-      accounts = Object.keys(this.ethStore.getState())
-    } catch (e) {
-      accounts = []
-    }
-    accounts.forEach((address) => {
-      this.ethStore.removeAccount(address)
-    })
-
-    // clear keyrings from memory
-    this.keyrings = []
-    this.memStore.updateState({
-      keyrings: [],
-      identities: {},
-    })
-  }
-
-  _updateMemStoreKeyrings () {
-    Promise.all(this.keyrings.map(this.displayForKeyring))
-    .then((keyrings) => {
-      this.memStore.updateState({ keyrings })
-    })
-  }
-
-}
-
-module.exports = KeyringController
diff --git a/app/scripts/lib/account-tracker.js b/app/scripts/lib/account-tracker.js
new file mode 100644
index 000000000..cdc21282d
--- /dev/null
+++ b/app/scripts/lib/account-tracker.js
@@ -0,0 +1,104 @@
+/* Account Tracker
+ *
+ * This module is responsible for tracking any number of accounts
+ * and caching their current balances & transaction counts.
+ *
+ * It also tracks transaction hashes, and checks their inclusion status
+ * on each new block.
+ */
+
+const async = require('async')
+const EthQuery = require('eth-query')
+const ObservableStore = require('obs-store')
+const EventEmitter = require('events').EventEmitter
+function noop () {}
+
+
+class AccountTracker extends EventEmitter {
+
+  constructor (opts = {}) {
+    super()
+
+    const initState = {
+      accounts: {},
+      currentBlockGasLimit: '',
+    }
+    this.store = new ObservableStore(initState)
+
+    this._provider = opts.provider
+    this._query = new EthQuery(this._provider)
+    this._blockTracker = opts.blockTracker
+    // subscribe to latest block
+    this._blockTracker.on('block', this._updateForBlock.bind(this))
+    // blockTracker.currentBlock may be null
+    this._currentBlockNumber = this._blockTracker.currentBlock
+  }
+
+  //
+  // public
+  //
+
+  addAccount (address) {
+    const accounts = this.store.getState().accounts
+    accounts[address] = {}
+    this.store.updateState({ accounts })
+    if (!this._currentBlockNumber) return
+    this._updateAccount(address)
+  }
+
+  removeAccount (address) {
+    const accounts = this.store.getState().accounts
+    delete accounts[address]
+    this.store.updateState({ accounts })
+  }
+
+  //
+  // private
+  //
+
+  _updateForBlock (block) {
+    this._currentBlockNumber = block.number
+    const currentBlockGasLimit = block.gasLimit
+
+    this.store.updateState({ currentBlockGasLimit })
+
+    async.parallel([
+      this._updateAccounts.bind(this),
+    ], (err) => {
+      if (err) return console.error(err)
+      this.emit('block', this.store.getState())
+    })
+  }
+
+  _updateAccounts (cb = noop) {
+    const accounts = this.store.getState().accounts
+    const addresses = Object.keys(accounts)
+    async.each(addresses, this._updateAccount.bind(this), cb)
+  }
+
+  _updateAccount (address, cb = noop) {
+    this._getAccount(address, (err, result) => {
+      if (err) return cb(err)
+      result.address = address
+      const accounts = this.store.getState().accounts
+      // only populate if the entry is still present
+      if (accounts[address]) {
+        accounts[address] = result
+        this.store.updateState({ accounts })
+      }
+      cb(null, result)
+    })
+  }
+
+  _getAccount (address, cb = noop) {
+    const query = this._query
+    async.parallel({
+      balance: query.getBalance.bind(query, address),
+      nonce: query.getTransactionCount.bind(query, address),
+      code: query.getCode.bind(query, address),
+    }, cb)
+  }
+
+}
+
+module.exports = AccountTracker
diff --git a/app/scripts/lib/eth-store.js b/app/scripts/lib/eth-store.js
deleted file mode 100644
index ebba98f5c..000000000
--- a/app/scripts/lib/eth-store.js
+++ /dev/null
@@ -1,138 +0,0 @@
-/* Ethereum Store
- *
- * This module is responsible for tracking any number of accounts
- * and caching their current balances & transaction counts.
- *
- * It also tracks transaction hashes, and checks their inclusion status
- * on each new block.
- */
-
-const async = require('async')
-const EthQuery = require('eth-query')
-const ObservableStore = require('obs-store')
-function noop () {}
-
-
-class EthereumStore extends ObservableStore {
-
-  constructor (opts = {}) {
-    super({
-      accounts: {},
-      transactions: {},
-      currentBlockNumber: '0',
-      currentBlockHash: '',
-      currentBlockGasLimit: '',
-    })
-    this._provider = opts.provider
-    this._query = new EthQuery(this._provider)
-    this._blockTracker = opts.blockTracker
-    // subscribe to latest block
-    this._blockTracker.on('block', this._updateForBlock.bind(this))
-    // blockTracker.currentBlock may be null
-    this._currentBlockNumber = this._blockTracker.currentBlock
-  }
-
-  //
-  // public
-  //
-
-  addAccount (address) {
-    const accounts = this.getState().accounts
-    accounts[address] = {}
-    this.updateState({ accounts })
-    if (!this._currentBlockNumber) return
-    this._updateAccount(address)
-  }
-
-  removeAccount (address) {
-    const accounts = this.getState().accounts
-    delete accounts[address]
-    this.updateState({ accounts })
-  }
-
-  addTransaction (txHash) {
-    const transactions = this.getState().transactions
-    transactions[txHash] = {}
-    this.updateState({ transactions })
-    if (!this._currentBlockNumber) return
-    this._updateTransaction(this._currentBlockNumber, txHash, noop)
-  }
-
-  removeTransaction (txHash) {
-    const transactions = this.getState().transactions
-    delete transactions[txHash]
-    this.updateState({ transactions })
-  }
-
-
-  //
-  // private
-  //
-
-  _updateForBlock (block) {
-    const blockNumber = '0x' + block.number.toString('hex')
-    this._currentBlockNumber = blockNumber
-    this.updateState({ currentBlockNumber: parseInt(blockNumber) })
-    this.updateState({ currentBlockHash: `0x${block.hash.toString('hex')}`})
-    this.updateState({ currentBlockGasLimit: `0x${block.gasLimit.toString('hex')}` })
-    async.parallel([
-      this._updateAccounts.bind(this),
-      this._updateTransactions.bind(this, blockNumber),
-    ], (err) => {
-      if (err) return console.error(err)
-      this.emit('block', this.getState())
-    })
-  }
-
-  _updateAccounts (cb = noop) {
-    const accounts = this.getState().accounts
-    const addresses = Object.keys(accounts)
-    async.each(addresses, this._updateAccount.bind(this), cb)
-  }
-
-  _updateAccount (address, cb = noop) {
-    const accounts = this.getState().accounts
-    this._getAccount(address, (err, result) => {
-      if (err) return cb(err)
-      result.address = address
-      // only populate if the entry is still present
-      if (accounts[address]) {
-        accounts[address] = result
-        this.updateState({ accounts })
-      }
-      cb(null, result)
-    })
-  }
-
-  _updateTransactions (block, cb = noop) {
-    const transactions = this.getState().transactions
-    const txHashes = Object.keys(transactions)
-    async.each(txHashes, this._updateTransaction.bind(this, block), cb)
-  }
-
-  _updateTransaction (block, txHash, cb = noop) {
-    // would use the block here to determine how many confirmations the tx has
-    const transactions = this.getState().transactions
-    this._query.getTransaction(txHash, (err, result) => {
-      if (err) return cb(err)
-      // only populate if the entry is still present
-      if (transactions[txHash]) {
-        transactions[txHash] = result
-        this.updateState({ transactions })
-      }
-      cb(null, result)
-    })
-  }
-
-  _getAccount (address, cb = noop) {
-    const query = this._query
-    async.parallel({
-      balance: query.getBalance.bind(query, address),
-      nonce: query.getTransactionCount.bind(query, address),
-      code: query.getCode.bind(query, address),
-    }, cb)
-  }
-
-}
-
-module.exports = EthereumStore
diff --git a/app/scripts/lib/events-proxy.js b/app/scripts/lib/events-proxy.js
new file mode 100644
index 000000000..d1199a278
--- /dev/null
+++ b/app/scripts/lib/events-proxy.js
@@ -0,0 +1,31 @@
+module.exports = function createEventEmitterProxy(eventEmitter, listeners) {
+  let target = eventEmitter
+  const eventHandlers = listeners || {}
+  const proxy = new Proxy({}, {
+    get: (obj, name) => {
+      // intercept listeners
+      if (name === 'on') return addListener
+      if (name === 'setTarget') return setTarget
+      if (name === 'proxyEventHandlers') return eventHandlers
+      return target[name]
+    },
+    set: (obj, name, value) => {
+      target[name] = value
+      return true
+    },
+  })
+  function setTarget (eventEmitter) {
+    target = eventEmitter
+    // migrate listeners
+    Object.keys(eventHandlers).forEach((name) => {
+      eventHandlers[name].forEach((handler) => target.on(name, handler))
+    })
+  }
+  function addListener (name, handler) {
+    if (!eventHandlers[name]) eventHandlers[name] = []
+    eventHandlers[name].push(handler)
+    target.on(name, handler)
+  }
+  if (listeners) proxy.setTarget(eventEmitter)
+  return proxy
+}
\ No newline at end of file
diff --git a/app/scripts/lib/pending-balance-calculator.js b/app/scripts/lib/pending-balance-calculator.js
new file mode 100644
index 000000000..cea642f1a
--- /dev/null
+++ b/app/scripts/lib/pending-balance-calculator.js
@@ -0,0 +1,51 @@
+const BN = require('ethereumjs-util').BN
+const normalize = require('eth-sig-util').normalize
+
+class PendingBalanceCalculator {
+
+  // Must be initialized with two functions:
+  // getBalance => Returns a promise of a BN of the current balance in Wei
+  // getPendingTransactions => Returns an array of TxMeta Objects,
+  // which have txParams properties, which include value, gasPrice, and gas,
+  // all in a base=16 hex format.
+  constructor ({ getBalance, getPendingTransactions }) {
+    this.getPendingTransactions = getPendingTransactions
+    this.getNetworkBalance = getBalance
+  }
+
+  async getBalance() {
+    const results = await Promise.all([
+      this.getNetworkBalance(),
+      this.getPendingTransactions(),
+    ])
+
+    const [ balance, pending ] = results
+    if (!balance) return undefined
+
+    const pendingValue = pending.reduce((total, tx) => {
+      return total.add(this.calculateMaxCost(tx))
+    }, new BN(0))
+
+    return `0x${balance.sub(pendingValue).toString(16)}`
+  }
+
+  calculateMaxCost (tx) {
+    const txValue = tx.txParams.value
+    const value = this.hexToBn(txValue)
+    const gasPrice = this.hexToBn(tx.txParams.gasPrice)
+
+    const gas = tx.txParams.gas
+    const gasLimit = tx.txParams.gasLimit
+    const gasLimitBn = this.hexToBn(gas || gasLimit)
+
+    const gasCost = gasPrice.mul(gasLimitBn)
+    return value.add(gasCost)
+  }
+
+  hexToBn (hex) {
+    return new BN(normalize(hex).substring(2), 16)
+  }
+
+}
+
+module.exports = PendingBalanceCalculator
diff --git a/app/scripts/lib/pending-tx-tracker.js b/app/scripts/lib/pending-tx-tracker.js
index 44e9d50fa..b97cec9ce 100644
--- a/app/scripts/lib/pending-tx-tracker.js
+++ b/app/scripts/lib/pending-tx-tracker.js
@@ -1,7 +1,6 @@
 const EventEmitter = require('events')
 const EthQuery = require('ethjs-query')
 const sufficientBalance = require('./util').sufficientBalance
-const RETRY_LIMIT = 3500 // Retry 3500 blocks, or about 1 day.
 /*
 
   Utility class for tracking the transactions as they
@@ -25,11 +24,10 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
     super()
     this.query = new EthQuery(config.provider)
     this.nonceTracker = config.nonceTracker
-
+    this.retryLimit = config.retryLimit || Infinity
     this.getBalance = config.getBalance
     this.getPendingTransactions = config.getPendingTransactions
     this.publishTransaction = config.publishTransaction
-    this.giveUpOnTransaction = config.giveUpOnTransaction
   }
 
   //  checks if a signed tx is in a block and
@@ -44,18 +42,18 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
       if (!txHash) {
         const noTxHashErr = new Error('We had an error while submitting this transaction, please try again.')
         noTxHashErr.name = 'NoTxHashError'
-        this.emit('txFailed', txId, noTxHashErr)
+        this.emit('tx:failed', txId, noTxHashErr)
         return
       }
 
 
       block.transactions.forEach((tx) => {
-        if (tx.hash === txHash) this.emit('txConfirmed', txId)
+        if (tx.hash === txHash) this.emit('tx:confirmed', txId)
       })
     })
   }
 
-  queryPendingTxs ({oldBlock, newBlock}) {
+  queryPendingTxs ({ oldBlock, newBlock }) {
     // check pending transactions on start
     if (!oldBlock) {
       this._checkPendingTxs()
@@ -96,7 +94,7 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
       // ignore resubmit warnings, return early
       if (isKnownTx) return
       // encountered real error - transition to error state
-      this.emit('txFailed', txMeta.id, err)
+      this.emit('tx:failed', txMeta.id, err)
     }))
   }
 
@@ -104,16 +102,16 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
     const address = txMeta.txParams.from
     const balance = this.getBalance(address)
     if (balance === undefined) return
-    if (!('retryCount' in txMeta)) txMeta.retryCount = 0
 
-    if (txMeta.retryCount > RETRY_LIMIT) {
-      return this.giveUpOnTransaction(txMeta.id)
+    if (txMeta.retryCount > this.retryLimit) {
+      const err = new Error(`Gave up submitting after ${this.retryLimit} blocks un-mined.`)
+      return this.emit('tx:failed', txMeta.id, err)
     }
 
     // if the value of the transaction is greater then the balance, fail.
     if (!sufficientBalance(txMeta.txParams, balance)) {
       const insufficientFundsError = new Error('Insufficient balance during rebroadcast.')
-      this.emit('txFailed', txMeta.id, insufficientFundsError)
+      this.emit('tx:failed', txMeta.id, insufficientFundsError)
       log.error(insufficientFundsError)
       return
     }
@@ -125,7 +123,7 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
     const txHash = await this.publishTransaction(rawTx)
 
     // Increment successful tries:
-    txMeta.retryCount++
+    this.emit('tx:retry', txMeta)
     return txHash
   }
 
@@ -137,7 +135,7 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
     if (!txHash) {
       const noTxHashErr = new Error('We had an error while submitting this transaction, please try again.')
       noTxHashErr.name = 'NoTxHashError'
-      this.emit('txFailed', txId, noTxHashErr)
+      this.emit('tx:failed', txId, noTxHashErr)
       return
     }
     // get latest transaction status
@@ -146,14 +144,14 @@ module.exports = class PendingTransactionTracker extends EventEmitter {
       txParams = await this.query.getTransactionByHash(txHash)
       if (!txParams) return
       if (txParams.blockNumber) {
-        this.emit('txConfirmed', txId)
+        this.emit('tx:confirmed', txId)
       }
     } catch (err) {
       txMeta.warning = {
         error: err,
         message: 'There was a problem loading this transaction.',
       }
-      this.emit('txWarning', txMeta)
+      this.emit('tx:warning', txMeta)
       throw err
     }
   }
diff --git a/app/scripts/lib/tx-utils.js b/app/scripts/lib/tx-gas-utils.js
index 5af078dc4..41f67e230 100644
--- a/app/scripts/lib/tx-utils.js
+++ b/app/scripts/lib/tx-gas-utils.js
@@ -1,6 +1,4 @@
 const EthQuery = require('ethjs-query')
-const Transaction = require('ethereumjs-tx')
-const normalize = require('eth-sig-util').normalize
 const {
   hexToBn,
   BnMultiplyByFraction,
@@ -78,26 +76,6 @@ module.exports = class txProvideUtil {
     return bnToHex(upperGasLimitBn)
   }
 
-  // builds ethTx from txParams object
-  buildEthTxFromParams (txParams) {
-    // normalize values
-    txParams.to = normalize(txParams.to)
-    txParams.from = normalize(txParams.from)
-    txParams.value = normalize(txParams.value)
-    txParams.data = normalize(txParams.data)
-    txParams.gas = normalize(txParams.gas || txParams.gasLimit)
-    txParams.gasPrice = normalize(txParams.gasPrice)
-    txParams.nonce = normalize(txParams.nonce)
-    // build ethTx
-    log.info(`Prepared tx for signing: ${JSON.stringify(txParams)}`)
-    const ethTx = new Transaction(txParams)
-    return ethTx
-  }
-
-  async publishTransaction (rawTx) {
-    return await this.query.sendRawTransaction(rawTx)
-  }
-
   async validateTxParams (txParams) {
     if (('value' in txParams) && txParams.value.indexOf('-') === 0) {
       throw new Error(`Invalid transaction value of ${txParams.value} not a positive number.`)
diff --git a/app/scripts/lib/tx-state-manager.js b/app/scripts/lib/tx-state-manager.js
new file mode 100644
index 000000000..abb9d7910
--- /dev/null
+++ b/app/scripts/lib/tx-state-manager.js
@@ -0,0 +1,245 @@
+const extend = require('xtend')
+const EventEmitter = require('events')
+const ObservableStore = require('obs-store')
+const ethUtil = require('ethereumjs-util')
+const txStateHistoryHelper = require('./tx-state-history-helper')
+
+module.exports = class TransactionStateManger extends EventEmitter {
+  constructor ({ initState, txHistoryLimit, getNetwork }) {
+    super()
+
+    this.store = new ObservableStore(
+      extend({
+        transactions: [],
+    }, initState))
+    this.txHistoryLimit = txHistoryLimit
+    this.getNetwork = getNetwork
+  }
+
+  // Returns the number of txs for the current network.
+  getTxCount () {
+    return this.getTxList().length
+  }
+
+  getTxList () {
+    const network = this.getNetwork()
+    const fullTxList = this.getFullTxList()
+    return fullTxList.filter((txMeta) => txMeta.metamaskNetworkId === network)
+  }
+
+  getFullTxList () {
+    return this.store.getState().transactions
+  }
+
+  // Returns the tx list
+  getUnapprovedTxList () {
+    const txList = this.getTxsByMetaData('status', 'unapproved')
+    return txList.reduce((result, tx) => {
+      result[tx.id] = tx
+      return result
+    }, {})
+  }
+
+  getPendingTransactions (address) {
+    const opts = { status: 'submitted' }
+    if (address) opts.from = address
+    return this.getFilteredTxList(opts)
+  }
+
+  addTx (txMeta) {
+    this.once(`${txMeta.id}:signed`, function (txId) {
+      this.removeAllListeners(`${txMeta.id}:rejected`)
+    })
+    this.once(`${txMeta.id}:rejected`, function (txId) {
+      this.removeAllListeners(`${txMeta.id}:signed`)
+    })
+    // initialize history
+    txMeta.history = []
+    // capture initial snapshot of txMeta for history
+    const snapshot = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
+    txMeta.history.push(snapshot)
+
+    const transactions = this.getFullTxList()
+    const txCount = this.getTxCount()
+    const txHistoryLimit = this.txHistoryLimit
+
+    // checks if the length of the tx history is
+    // longer then desired persistence limit
+    // and then if it is removes only confirmed
+    // or rejected tx's.
+    // not tx's that are pending or unapproved
+    if (txCount > txHistoryLimit - 1) {
+      const index = transactions.findIndex((metaTx) => metaTx.status === 'confirmed' || metaTx.status === 'rejected')
+      transactions.splice(index, 1)
+    }
+    transactions.push(txMeta)
+    this._saveTxList(transactions)
+    return txMeta
+  }
+  // gets tx by Id and returns it
+  getTx (txId) {
+    const txMeta = this.getTxsByMetaData('id', txId)[0]
+    return txMeta
+  }
+
+  updateTx (txMeta) {
+    if (txMeta.txParams) {
+      Object.keys(txMeta.txParams).forEach((key) => {
+        let value = txMeta.txParams[key]
+        if (typeof value !== 'string') console.error(`${key}: ${value} in txParams is not a string`)
+        if (!ethUtil.isHexPrefixed(value)) console.error('is not hex prefixed, anything on txParams must be hex prefixed')
+      })
+    }
+
+    // create txMeta snapshot for history
+    const currentState = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
+    // recover previous tx state obj
+    const previousState = txStateHistoryHelper.replayHistory(txMeta.history)
+    // generate history entry and add to history
+    const entry = txStateHistoryHelper.generateHistoryEntry(previousState, currentState)
+   txMeta.history.push(entry)
+
+    // commit txMeta to state
+    const txId = txMeta.id
+    const txList = this.getFullTxList()
+    const index = txList.findIndex(txData => txData.id === txId)
+    txList[index] = txMeta
+    this._saveTxList(txList)
+  }
+
+
+  // merges txParams obj onto txData.txParams
+  // use extend to ensure that all fields are filled
+  updateTxParams (txId, txParams) {
+    const txMeta = this.getTx(txId)
+    txMeta.txParams = extend(txMeta.txParams, txParams)
+    this.updateTx(txMeta)
+  }
+
+/*
+  Takes an object of fields to search for eg:
+  let thingsToLookFor = {
+    to: '0x0..',
+    from: '0x0..',
+    status: 'signed',
+    err: undefined,
+  }
+  and returns a list of tx with all
+  options matching
+
+  ****************HINT****************
+  | `err: undefined` is like looking |
+  | for a tx with no err             |
+  | so you can also search txs that  |
+  | dont have something as well by   |
+  | setting the value as undefined   |
+  ************************************
+
+  this is for things like filtering a the tx list
+  for only tx's from 1 account
+  or for filltering for all txs from one account
+  and that have been 'confirmed'
+  */
+  getFilteredTxList (opts, initialList) {
+    let filteredTxList = initialList
+    Object.keys(opts).forEach((key) => {
+      filteredTxList = this.getTxsByMetaData(key, opts[key], filteredTxList)
+    })
+    return filteredTxList
+  }
+
+  getTxsByMetaData (key, value, txList = this.getTxList()) {
+    return txList.filter((txMeta) => {
+      if (txMeta.txParams[key]) {
+        return txMeta.txParams[key] === value
+      } else {
+        return txMeta[key] === value
+      }
+    })
+  }
+
+  // STATUS METHODS
+  // statuses:
+  //    - `'unapproved'` the user has not responded
+  //    - `'rejected'` the user has responded no!
+  //    - `'approved'` the user has approved the tx
+  //    - `'signed'` the tx is signed
+  //    - `'submitted'` the tx is sent to a server
+  //    - `'confirmed'` the tx has been included in a block.
+  //    - `'failed'` the tx failed for some reason, included on tx data.
+
+  // get::set status
+
+  // should return the status of the tx.
+  getTxStatus (txId) {
+    const txMeta = this.getTx(txId)
+    return txMeta.status
+  }
+
+  // should update the status of the tx to 'rejected'.
+  setTxStatusRejected (txId) {
+    this._setTxStatus(txId, 'rejected')
+  }
+
+  // should update the status of the tx to 'approved'.
+  setTxStatusApproved (txId) {
+    this._setTxStatus(txId, 'approved')
+  }
+
+  // should update the status of the tx to 'signed'.
+  setTxStatusSigned (txId) {
+    this._setTxStatus(txId, 'signed')
+  }
+
+  // should update the status of the tx to 'submitted'.
+  setTxStatusSubmitted (txId) {
+    this._setTxStatus(txId, 'submitted')
+  }
+
+  // should update the status of the tx to 'confirmed'.
+  setTxStatusConfirmed (txId) {
+    this._setTxStatus(txId, 'confirmed')
+  }
+
+  setTxStatusFailed (txId, err) {
+    const txMeta = this.getTx(txId)
+    txMeta.err = {
+      message: err.toString(),
+      stack: err.stack,
+    }
+    this.updateTx(txMeta)
+    this._setTxStatus(txId, 'failed')
+  }
+
+//
+//           PRIVATE METHODS
+//
+
+  //  Should find the tx in the tx list and
+  //  update it.
+  //  should set the status in txData
+  //    - `'unapproved'` the user has not responded
+  //    - `'rejected'` the user has responded no!
+  //    - `'approved'` the user has approved the tx
+  //    - `'signed'` the tx is signed
+  //    - `'submitted'` the tx is sent to a server
+  //    - `'confirmed'` the tx has been included in a block.
+  //    - `'failed'` the tx failed for some reason, included on tx data.
+  _setTxStatus (txId, status) {
+    const txMeta = this.getTx(txId)
+    txMeta.status = status
+    this.emit(`${txMeta.id}:${status}`, txId)
+    this.emit(`tx:status-update`, txId, status)
+    if (status === 'submitted' || status === 'rejected') {
+      this.emit(`${txMeta.id}:finished`, txMeta)
+    }
+    this.updateTx(txMeta)
+    this.emit('update:badge')
+  }
+
+  // Saves the new/updated txList.
+  // Function is intended only for internal use
+  _saveTxList (transactions) {
+    this.store.updateState({ transactions })
+  }
+}
\ No newline at end of file
diff --git a/app/scripts/metamask-controller.js b/app/scripts/metamask-controller.js
index 42248827f..5b3161bc6 100644
--- a/app/scripts/metamask-controller.js
+++ b/app/scripts/metamask-controller.js
@@ -4,7 +4,7 @@ const promiseToCallback = require('promise-to-callback')
 const pump = require('pump')
 const Dnode = require('dnode')
 const ObservableStore = require('obs-store')
-const EthStore = require('./lib/eth-store')
+const AccountTracker = require('./lib/account-tracker')
 const EthQuery = require('eth-query')
 const RpcEngine = require('json-rpc-engine')
 const debounce = require('debounce')
@@ -14,7 +14,7 @@ const createOriginMiddleware = require('./lib/createOriginMiddleware')
 const createLoggerMiddleware = require('./lib/createLoggerMiddleware')
 const createProviderMiddleware = require('./lib/createProviderMiddleware')
 const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
-const KeyringController = require('./keyring-controller')
+const KeyringController = require('eth-keyring-controller')
 const NetworkController = require('./controllers/network')
 const PreferencesController = require('./controllers/preferences')
 const CurrencyController = require('./controllers/currency')
@@ -26,6 +26,7 @@ const BlacklistController = require('./controllers/blacklist')
 const MessageManager = require('./lib/message-manager')
 const PersonalMessageManager = require('./lib/personal-message-manager')
 const TransactionController = require('./controllers/transactions')
+const BalancesController = require('./controllers/computed-balances')
 const ConfigManager = require('./lib/config-manager')
 const nodeify = require('./lib/nodeify')
 const accountImporter = require('./account-import-strategies')
@@ -81,11 +82,12 @@ module.exports = class MetamaskController extends EventEmitter {
 
     // rpc provider
     this.provider = this.initializeProvider()
-    this.blockTracker = this.provider
+    this.blockTracker = this.provider._blockTracker
 
     // eth data query tools
     this.ethQuery = new EthQuery(this.provider)
-    this.ethStore = new EthStore({
+    // account tracker watches balances, nonces, and any code at their address.
+    this.accountTracker = new AccountTracker({
       provider: this.provider,
       blockTracker: this.blockTracker,
     })
@@ -93,12 +95,17 @@ module.exports = class MetamaskController extends EventEmitter {
     // key mgmt
     this.keyringController = new KeyringController({
       initState: initState.KeyringController,
-      ethStore: this.ethStore,
+      accountTracker: this.accountTracker,
       getNetwork: this.networkController.getNetworkState.bind(this.networkController),
       encryptor: opts.encryptor || undefined,
     })
+
     this.keyringController.on('newAccount', (address) => {
       this.preferencesController.setSelectedAddress(address)
+      this.accountTracker.addAccount(address)
+    })
+    this.keyringController.on('removedAccount', (address) => {
+      this.accountTracker.removeAccount(address)
     })
 
     // address book controller
@@ -117,10 +124,21 @@ module.exports = class MetamaskController extends EventEmitter {
       provider: this.provider,
       blockTracker: this.blockTracker,
       ethQuery: this.ethQuery,
-      ethStore: this.ethStore,
+      accountTracker: this.accountTracker,
     })
     this.txController.on('newUnaprovedTx', opts.showUnapprovedTx.bind(opts))
 
+    // computed balances (accounting for pending transactions)
+    this.balancesController = new BalancesController({
+      accountTracker: this.accountTracker,
+      txController: this.txController,
+      blockTracker: this.blockTracker,
+    })
+    this.networkController.on('networkDidChange', () => {
+      this.balancesController.updateAllBalances()
+    })
+    this.balancesController.updateAllBalances()
+
     // notices
     this.noticeController = new NoticeController({
       initState: initState.NoticeController,
@@ -172,8 +190,9 @@ module.exports = class MetamaskController extends EventEmitter {
 
     // manual mem state subscriptions
     this.networkController.store.subscribe(this.sendUpdate.bind(this))
-    this.ethStore.subscribe(this.sendUpdate.bind(this))
+    this.accountTracker.store.subscribe(this.sendUpdate.bind(this))
     this.txController.memStore.subscribe(this.sendUpdate.bind(this))
+    this.balancesController.store.subscribe(this.sendUpdate.bind(this))
     this.messageManager.memStore.subscribe(this.sendUpdate.bind(this))
     this.personalMessageManager.memStore.subscribe(this.sendUpdate.bind(this))
     this.keyringController.memStore.subscribe(this.sendUpdate.bind(this))
@@ -213,8 +232,7 @@ module.exports = class MetamaskController extends EventEmitter {
       processTransaction: nodeify(async (txParams) => await this.txController.newUnapprovedTransaction(txParams), this),
       // old style msg signing
       processMessage: this.newUnsignedMessage.bind(this),
-
-      // new style msg signing
+      // personal_sign msg signing
       processPersonalMessage: this.newUnsignedPersonalMessage.bind(this),
     })
   }
@@ -248,16 +266,18 @@ module.exports = class MetamaskController extends EventEmitter {
     const wallet = this.configManager.getWallet()
     const vault = this.keyringController.store.getState().vault
     const isInitialized = (!!wallet || !!vault)
+
     return extend(
       {
         isInitialized,
       },
       this.networkController.store.getState(),
-      this.ethStore.getState(),
+      this.accountTracker.store.getState(),
       this.txController.memStore.getState(),
       this.messageManager.memStore.getState(),
       this.personalMessageManager.memStore.getState(),
       this.keyringController.memStore.getState(),
+      this.balancesController.store.getState(),
       this.preferencesController.store.getState(),
       this.addressBookController.store.getState(),
       this.currencyController.store.getState(),
diff --git a/app/scripts/migrations/_multi-keyring.js b/app/scripts/migrations/_multi-keyring.js
index 253aa3d9d..7a4578ea7 100644
--- a/app/scripts/migrations/_multi-keyring.js
+++ b/app/scripts/migrations/_multi-keyring.js
@@ -10,7 +10,7 @@ which we dont have access to at the time of this writing.
 const ObservableStore = require('obs-store')
 const ConfigManager = require('../../app/scripts/lib/config-manager')
 const IdentityStoreMigrator = require('../../app/scripts/lib/idStore-migrator')
-const KeyringController = require('../../app/scripts/lib/keyring-controller')
+const KeyringController = require('eth-keyring-controller')
 
 const password = 'obviously not correct'