Merge pull request #2035 from MetaMask/transactionControllerRefractorPt3

Transaction controller refractor pt3

11 files changed, 827 insertions, 552 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/controllers/balance.js b/app/scripts/controllers/balance.js
index 964dff0df..4fa4c78fe 100644
--- a/app/scripts/controllers/balance.js
+++ b/app/scripts/controllers/balance.js
@@ -33,9 +33,18 @@ class BalanceController {
 
   _registerUpdates () {
     const update = this.updateBalance.bind(this)
-    this.txController.on('submitted', update)
-    this.txController.on('confirmed', update)
-    this.txController.on('failed', update)
+
+    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)
   }
diff --git a/app/scripts/controllers/transactions.js b/app/scripts/controllers/transactions.js
index 87521c76b..4f5c94675 100644
--- a/app/scripts/controllers/transactions.js
+++ b/app/scripts/controllers/transactions.js
@@ -1,74 +1,85 @@
 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.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.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.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
@@ -80,7 +91,7 @@ module.exports = class TransactionController extends EventEmitter {
     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
@@ -276,181 +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)
-    this.emit(`${status}`, txId)
-    if (status === 'submitted' || status === 'rejected') {
-      this.emit(`${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/lib/pending-tx-tracker.js b/app/scripts/lib/pending-tx-tracker.js
index 44e9d50fa..b07a6bd39 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
@@ -44,13 +42,13 @@ 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)
       })
     })
   }
@@ -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/test/unit/components/pending-tx-test.js b/test/unit/components/pending-tx-test.js
index fdade1042..20feba2a3 100644
--- a/test/unit/components/pending-tx-test.js
+++ b/test/unit/components/pending-tx-test.js
@@ -24,7 +24,8 @@ describe('PendingTx', function () {
       'to': '0xc5b8dbac4c1d3f152cdeb400e2313f309c410acb',
       'value': '0xde0b6b3a7640000',
       gasPrice,
-      'gas': '0x7b0c'},
+      'gas': '0x7b0c',
+    },
     'gasLimitSpecified': false,
     'estimatedGas': '0x5208',
   }
diff --git a/test/unit/pending-tx-test.js b/test/unit/pending-tx-test.js
index 8c6d287f8..2865a30e6 100644
--- a/test/unit/pending-tx-test.js
+++ b/test/unit/pending-tx-test.js
@@ -62,7 +62,7 @@ describe('PendingTransactionTracker', function () {
     it('should emit \'txFailed\' if the txMeta does not have a hash', function (done) {
       const block = Proxy.revocable({}, {}).revoke()
       pendingTxTracker.getPendingTransactions = () => [txMetaNoHash]
-      pendingTxTracker.once('txFailed', (txId, err) => {
+      pendingTxTracker.once('tx:failed', (txId, err) => {
         assert(txId, txMetaNoHash.id, 'should pass txId')
         done()
       })
@@ -71,11 +71,11 @@ describe('PendingTransactionTracker', function () {
     it('should emit \'txConfirmed\' if the tx is in the block', function (done) {
       const block = { transactions: [txMeta]}
       pendingTxTracker.getPendingTransactions = () => [txMeta]
-      pendingTxTracker.once('txConfirmed', (txId) => {
+      pendingTxTracker.once('tx:confirmed', (txId) => {
         assert(txId, txMeta.id, 'should pass txId')
         done()
       })
-      pendingTxTracker.once('txFailed', (_, err) => { done(err) })
+      pendingTxTracker.once('tx:failed', (_, err) => { done(err) })
       pendingTxTracker.checkForTxInBlock(block)
     })
   })
@@ -108,7 +108,7 @@ describe('PendingTransactionTracker', function () {
 
   describe('#_checkPendingTx', function () {
     it('should emit \'txFailed\' if the txMeta does not have a hash', function (done) {
-      pendingTxTracker.once('txFailed', (txId, err) => {
+      pendingTxTracker.once('tx:failed', (txId, err) => {
         assert(txId, txMetaNoHash.id, 'should pass txId')
         done()
       })
@@ -122,11 +122,11 @@ describe('PendingTransactionTracker', function () {
 
     it('should emit \'txConfirmed\'', function (done) {
       providerResultStub.eth_getTransactionByHash = {blockNumber: '0x01'}
-      pendingTxTracker.once('txConfirmed', (txId) => {
+      pendingTxTracker.once('tx:confirmed', (txId) => {
         assert(txId, txMeta.id, 'should pass txId')
         done()
       })
-      pendingTxTracker.once('txFailed', (_, err) => { done(err) })
+      pendingTxTracker.once('tx:failed', (_, err) => { done(err) })
       pendingTxTracker._checkPendingTx(txMeta)
     })
   })
@@ -188,7 +188,7 @@ describe('PendingTransactionTracker', function () {
       ]
       const enoughForAllErrors = txList.concat(txList)
 
-      pendingTxTracker.on('txFailed', (_, err) => done(err))
+      pendingTxTracker.on('tx:failed', (_, err) => done(err))
 
       pendingTxTracker.getPendingTransactions = () => enoughForAllErrors
       pendingTxTracker._resubmitTx = async (tx) => {
@@ -202,7 +202,7 @@ describe('PendingTransactionTracker', function () {
       pendingTxTracker.resubmitPendingTxs()
     })
     it('should emit \'txFailed\' if it encountered a real error', function (done) {
-      pendingTxTracker.once('txFailed', (id, err) => err.message === 'im some real error' ? txList[id - 1].resolve() : done(err))
+      pendingTxTracker.once('tx:failed', (id, err) => err.message === 'im some real error' ? txList[id - 1].resolve() : done(err))
 
       pendingTxTracker.getPendingTransactions = () => txList
       pendingTxTracker._resubmitTx = async (tx) => { throw new TypeError('im some real error') }
@@ -226,7 +226,7 @@ describe('PendingTransactionTracker', function () {
 
     // Stubbing out current account state:
     // Adding the fake tx:
-    pendingTxTracker.once('txFailed', (txId, err) => {
+    pendingTxTracker.once('tx:failed', (txId, err) => {
       assert(err, 'Should have a error')
       done()
     })
diff --git a/test/unit/tx-controller-test.js b/test/unit/tx-controller-test.js
index 7b875db66..66772ff88 100644
--- a/test/unit/tx-controller-test.js
+++ b/test/unit/tx-controller-test.js
@@ -2,21 +2,19 @@ const assert = require('assert')
 const ethUtil = require('ethereumjs-util')
 const EthTx = require('ethereumjs-tx')
 const ObservableStore = require('obs-store')
-const clone = require('clone')
 const sinon = require('sinon')
 const TransactionController = require('../../app/scripts/controllers/transactions')
-const TxProvideUtils = require('../../app/scripts/lib/tx-utils')
-const txStateHistoryHelper = require('../../app/scripts/lib/tx-state-history-helper')
+const TxGasUtils = require('../../app/scripts/lib/tx-gas-utils')
+const { createStubedProvider } = require('../stub/provider')
 
 const noop = () => true
 const currentNetworkId = 42
 const otherNetworkId = 36
 const privKey = new Buffer('8718b9618a37d1fc78c436511fc6df3c8258d3250635bba617f33003270ec03e', 'hex')
-const { createStubedProvider } = require('../stub/provider')
 
 
 describe('Transaction Controller', function () {
-  let txController, engine, provider, providerResultStub
+  let txController, provider, providerResultStub
 
   beforeEach(function () {
     providerResultStub = {}
@@ -27,34 +25,97 @@ describe('Transaction Controller', function () {
       networkStore: new ObservableStore(currentNetworkId),
       txHistoryLimit: 10,
       blockTracker: { getCurrentBlock: noop, on: noop, once: noop },
-      accountTracker: { getState: noop },
+      accountTracker: { store: { getState: noop } },
       signTransaction: (ethTx) => new Promise((resolve) => {
         ethTx.sign(privKey)
         resolve()
       }),
     })
     txController.nonceTracker.getNonceLock = () => Promise.resolve({ nextNonce: 0, releaseLock: noop })
-    txController.txProviderUtils = new TxProvideUtils(txController.provider)
+    txController.txProviderUtils = new TxGasUtils(txController.provider)
+  })
+
+  describe('#getState', function () {
+    it('should return a state object with the right keys and datat types', function () {
+      const exposedState = txController.getState()
+      assert('unapprovedTxs' in exposedState, 'state should have the key unapprovedTxs')
+      assert('selectedAddressTxList' in exposedState, 'state should have the key selectedAddressTxList')
+      assert(typeof exposedState.unapprovedTxs === 'object', 'should be an object')
+      assert(Array.isArray(exposedState.selectedAddressTxList), 'should be an array')
+    })
+  })
+
+  describe('#getUnapprovedTxCount', function () {
+    it('should return the number of unapproved txs', function () {
+      txController.txStateManager._saveTxList([
+        { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 2, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 3, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} },
+      ])
+      const unapprovedTxCount = txController.getUnapprovedTxCount()
+      assert.equal(unapprovedTxCount, 3, 'should be 3')
+    })
   })
 
+  describe('#getPendingTxCount', function () {
+    it('should return the number of pending txs', function () {
+      txController.txStateManager._saveTxList([
+        { id: 1, status: 'submitted', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 2, status: 'submitted', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 3, status: 'submitted', metamaskNetworkId: currentNetworkId, txParams: {} },
+      ])
+      const pendingTxCount = txController.getPendingTxCount()
+      assert.equal(pendingTxCount, 3, 'should be 3')
+    })
+  })
+
+  describe('#getConfirmedTransactions', function () {
+    let address
+    beforeEach(function () {
+      address = '0xc684832530fcbddae4b4230a47e991ddcec2831d'
+      const txParams = {
+        'from': address,
+        'to': '0xc684832530fcbddae4b4230a47e991ddcec2831d',
+      }
+      txController.txStateManager._saveTxList([
+        {id: 0, status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 1, status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 2, status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 3, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 4, status: 'rejected', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 5, status: 'approved', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 6, status: 'signed', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 7, status: 'submitted', metamaskNetworkId: currentNetworkId, txParams},
+        {id: 8, status: 'failed', metamaskNetworkId: currentNetworkId, txParams},
+      ])
+    })
+
+    it('should return the number of confirmed txs', function () {
+      assert.equal(txController.nonceTracker.getConfirmedTransactions(address).length, 3)
+    })
+  })
+
+
   describe('#newUnapprovedTransaction', function () {
     let stub, txMeta, txParams
     beforeEach(function () {
       txParams = {
-        'from':'0xc684832530fcbddae4b4230a47e991ddcec2831d',
-        'to':'0xc684832530fcbddae4b4230a47e991ddcec2831d',
-      },
+        'from': '0xc684832530fcbddae4b4230a47e991ddcec2831d',
+        'to': '0xc684832530fcbddae4b4230a47e991ddcec2831d',
+      }
       txMeta = {
         status: 'unapproved',
         id: 1,
         metamaskNetworkId: currentNetworkId,
         txParams,
+        history: [],
       }
-      txController.addTx(txMeta)
-      stub = sinon.stub(txController, 'addUnapprovedTransaction').returns(Promise.resolve(txMeta))
+      txController.txStateManager._saveTxList([txMeta])
+      stub = sinon.stub(txController, 'addUnapprovedTransaction').returns(Promise.resolve(txController.txStateManager.addTx(txMeta)))
     })
 
     afterEach(function () {
+      txController.txStateManager._saveTxList([])
       stub.restore()
     })
 
@@ -72,7 +133,7 @@ describe('Transaction Controller', function () {
       txController.once('newUnaprovedTx', (txMetaFromEmit) => {
         setTimeout(() => {
           txController.setTxHash(txMetaFromEmit.id, '0x0')
-          txController.setTxStatusSubmitted(txMetaFromEmit.id)
+          txController.txStateManager.setTxStatusSubmitted(txMetaFromEmit.id)
         }, 10)
       })
 
@@ -87,7 +148,7 @@ describe('Transaction Controller', function () {
     it('should reject when finished and status is rejected', function (done) {
       txController.once('newUnaprovedTx', (txMetaFromEmit) => {
         setTimeout(() => {
-          txController.setTxStatusRejected(txMetaFromEmit.id)
+          txController.txStateManager.setTxStatusRejected(txMetaFromEmit.id)
         }, 10)
       })
 
@@ -110,7 +171,7 @@ describe('Transaction Controller', function () {
         assert(('txParams' in txMeta), 'should have a txParams')
         assert(('history' in txMeta), 'should have a history')
 
-        const memTxMeta = txController.getTx(txMeta.id)
+        const memTxMeta = txController.txStateManager.getTx(txMeta.id)
         assert.deepEqual(txMeta, memTxMeta, `txMeta should be stored in txController after adding it\n  expected: ${txMeta} \n  got: ${memTxMeta}`)
         addTxDefaultsStub.restore()
         done()
@@ -120,10 +181,10 @@ describe('Transaction Controller', function () {
 
   describe('#addTxDefaults', function () {
     it('should add the tx defaults if their are none', function (done) {
-      let txMeta = {
+      const txMeta = {
         'txParams': {
-          'from':'0xc684832530fcbddae4b4230a47e991ddcec2831d',
-          'to':'0xc684832530fcbddae4b4230a47e991ddcec2831d',
+          'from': '0xc684832530fcbddae4b4230a47e991ddcec2831d',
+          'to': '0xc684832530fcbddae4b4230a47e991ddcec2831d',
         },
       }
         providerResultStub.eth_gasPrice = '4a817c800'
@@ -131,7 +192,7 @@ describe('Transaction Controller', function () {
         providerResultStub.eth_estimateGas = '5209'
       txController.addTxDefaults(txMeta)
       .then((txMetaWithDefaults) => {
-        assert(txMetaWithDefaults.txParams.value, '0x0','should have added 0x0 as the value')
+        assert(txMetaWithDefaults.txParams.value, '0x0', 'should have added 0x0 as the value')
         assert(txMetaWithDefaults.txParams.gasPrice, 'should have added the gas price')
         assert(txMetaWithDefaults.txParams.gas, 'should have added the gas field')
         done()
@@ -163,214 +224,31 @@ describe('Transaction Controller', function () {
     })
   })
 
-  describe('#getTxList', function () {
-    it('when new should return empty array', function () {
-      var result = txController.getTxList()
-      assert.ok(Array.isArray(result))
-      assert.equal(result.length, 0)
-    })
-  })
-
   describe('#addTx', function () {
-    it('adds a tx returned in getTxList', function () {
-      var tx = { id: 1, status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
-      txController.addTx(tx, noop)
-      var result = txController.getTxList()
-      assert.ok(Array.isArray(result))
-      assert.equal(result.length, 1)
-      assert.equal(result[0].id, 1)
-    })
-
-    it('does not override txs from other networks', function () {
-      var tx = { id: 1, status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
-      var tx2 = { id: 2, status: 'confirmed', metamaskNetworkId: otherNetworkId, txParams: {} }
-      txController.addTx(tx, noop)
-      txController.addTx(tx2, noop)
-      var result = txController.getFullTxList()
-      var result2 = txController.getTxList()
-      assert.equal(result.length, 2, 'txs were deleted')
-      assert.equal(result2.length, 1, 'incorrect number of txs on network.')
-    })
-
-    it('cuts off early txs beyond a limit', function () {
-      const limit = txController.txHistoryLimit
-      for (let i = 0; i < limit + 1; i++) {
-        const tx = { id: i, time: new Date(), status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
-        txController.addTx(tx, noop)
-      }
-      var result = txController.getTxList()
-      assert.equal(result.length, limit, `limit of ${limit} txs enforced`)
-      assert.equal(result[0].id, 1, 'early txs truncted')
-    })
-
-    it('cuts off early txs beyond a limit whether or not it is confirmed or rejected', function () {
-      const limit = txController.txHistoryLimit
-      for (let i = 0; i < limit + 1; i++) {
-        const tx = { id: i, time: new Date(), status: 'rejected', metamaskNetworkId: currentNetworkId, txParams: {} }
-        txController.addTx(tx, noop)
-      }
-      var result = txController.getTxList()
-      assert.equal(result.length, limit, `limit of ${limit} txs enforced`)
-      assert.equal(result[0].id, 1, 'early txs truncted')
-    })
-
-    it('cuts off early txs beyond a limit but does not cut unapproved txs', function () {
-      var unconfirmedTx = { id: 0, time: new Date(), status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
-      txController.addTx(unconfirmedTx, noop)
-      const limit = txController.txHistoryLimit
-      for (let i = 1; i < limit + 1; i++) {
-        const tx = { id: i, time: new Date(), status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
-        txController.addTx(tx, noop)
-      }
-      var result = txController.getTxList()
-      assert.equal(result.length, limit, `limit of ${limit} txs enforced`)
-      assert.equal(result[0].id, 0, 'first tx should still be there')
-      assert.equal(result[0].status, 'unapproved', 'first tx should be unapproved')
-      assert.equal(result[1].id, 2, 'early txs truncted')
-    })
-  })
-
-  describe('#setTxStatusSigned', function () {
-    it('sets the tx status to signed', function () {
-      var tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
-      txController.addTx(tx, noop)
-      txController.setTxStatusSigned(1)
-      var result = txController.getTxList()
-      assert.ok(Array.isArray(result))
-      assert.equal(result.length, 1)
-      assert.equal(result[0].status, 'signed')
-    })
-
-    it('should emit a signed event to signal the exciton of callback', (done) => {
-      this.timeout(10000)
-      var tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
-      const noop = function () {
-        assert(true, 'event listener has been triggered and noop executed')
-        done()
-      }
-      txController.addTx(tx)
-      txController.on('1:signed', noop)
-      txController.setTxStatusSigned(1)
-    })
-  })
-
-  describe('#setTxStatusRejected', function () {
-    it('sets the tx status to rejected', function () {
-      var tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
-      txController.addTx(tx)
-      txController.setTxStatusRejected(1)
-      var result = txController.getTxList()
-      assert.ok(Array.isArray(result))
-      assert.equal(result.length, 1)
-      assert.equal(result[0].status, 'rejected')
-    })
-
-    it('should emit a rejected event to signal the exciton of callback', (done) => {
-      this.timeout(10000)
-      var tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
-      txController.addTx(tx)
-      const noop = function (err, txId) {
-        assert(true, 'event listener has been triggered and noop executed')
-        done()
-      }
-      txController.on('1:rejected', noop)
-      txController.setTxStatusRejected(1)
-    })
-  })
-
-  describe('#updateTx', function () {
-    it('replaces the tx with the same id', function () {
-      txController.addTx({ id: '1', status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
-      txController.addTx({ id: '2', status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
-      const tx1 = txController.getTx('1')
-      tx1.status = 'blah'
-      tx1.hash = 'foo'
-      txController.updateTx(tx1)
-      const savedResult = txController.getTx('1')
-      assert.equal(savedResult.hash, 'foo')
-    })
-
-    it('updates gas price and adds history items', function () {
-      const originalGasPrice = '0x01'
-      const desiredGasPrice = '0x02'
-
+    it('should emit updates', function (done) {
       const txMeta = {
         id: '1',
         status: 'unapproved',
         metamaskNetworkId: currentNetworkId,
-        txParams: {
-          gasPrice: originalGasPrice,
-        },
+        txParams: {},
       }
 
+      const eventNames = ['update:badge', '1:unapproved']
+      const listeners = []
+      eventNames.forEach((eventName) => {
+        listeners.push(new Promise((resolve) => {
+          txController.once(eventName, (arg) => {
+            resolve(arg)
+          })
+        }))
+      })
+      Promise.all(listeners)
+      .then((returnValues) => {
+        assert.deepEqual(returnValues.pop(), txMeta, 'last event 1:unapproved should return txMeta')
+        done()
+      })
+      .catch(done)
       txController.addTx(txMeta)
-      const updatedTx = txController.getTx('1')
-      // verify tx was initialized correctly
-      assert.equal(updatedTx.history.length, 1, 'one history item (initial)')
-      assert.equal(Array.isArray(updatedTx.history[0]), false, 'first history item is initial state')
-      assert.deepEqual(updatedTx.history[0], txStateHistoryHelper.snapshotFromTxMeta(updatedTx), 'first history item is initial state')
-      // modify value and updateTx
-      updatedTx.txParams.gasPrice = desiredGasPrice
-      txController.updateTx(updatedTx)
-      // check updated value
-      const result = txController.getTx('1')
-      assert.equal(result.txParams.gasPrice, desiredGasPrice, 'gas price updated')
-      // validate history was updated
-      assert.equal(result.history.length, 2, 'two history items (initial + diff)')
-      const expectedEntry = { op: 'replace', path: '/txParams/gasPrice', value: desiredGasPrice }
-      assert.deepEqual(result.history[1], [expectedEntry], 'two history items (initial + diff)')
-    })
-  })
-
-  describe('#getUnapprovedTxList', function () {
-    it('returns unapproved txs in a hash', function () {
-      txController.addTx({ id: '1', status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
-      txController.addTx({ id: '2', status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
-      const result = txController.getUnapprovedTxList()
-      assert.equal(typeof result, 'object')
-      assert.equal(result['1'].status, 'unapproved')
-      assert.equal(result['2'], undefined)
-    })
-  })
-
-  describe('#getTx', function () {
-    it('returns a tx with the requested id', function () {
-      txController.addTx({ id: '1', status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
-      txController.addTx({ id: '2', status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
-      assert.equal(txController.getTx('1').status, 'unapproved')
-      assert.equal(txController.getTx('2').status, 'confirmed')
-    })
-  })
-
-  describe('#getFilteredTxList', function () {
-    it('returns a tx with the requested data', function () {
-      const txMetas = [
-        { id: 0, status: 'unapproved', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
-        { id: 1, status: 'unapproved', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
-        { id: 2, status: 'unapproved', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
-        { id: 3, status: 'unapproved', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
-        { id: 4, status: 'unapproved', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
-        { id: 5, status: 'confirmed', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
-        { id: 6, status: 'confirmed', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
-        { id: 7, status: 'confirmed', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
-        { id: 8, status: 'confirmed', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
-        { id: 9, status: 'confirmed', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
-      ]
-      txMetas.forEach((txMeta) => txController.addTx(txMeta, noop))
-      let filterParams
-
-      filterParams = { status: 'unapproved', from: '0xaa' }
-      assert.equal(txController.getFilteredTxList(filterParams).length, 3, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
-      filterParams = { status: 'unapproved', to: '0xaa' }
-      assert.equal(txController.getFilteredTxList(filterParams).length, 2, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
-      filterParams = { status: 'confirmed', from: '0xbb' }
-      assert.equal(txController.getFilteredTxList(filterParams).length, 3, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
-      filterParams = { status: 'confirmed' }
-      assert.equal(txController.getFilteredTxList(filterParams).length, 5, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
-      filterParams = { from: '0xaa' }
-      assert.equal(txController.getFilteredTxList(filterParams).length, 5, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
-      filterParams = { to: '0xaa' }
-      assert.equal(txController.getFilteredTxList(filterParams).length, 5, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
     })
   })
 
@@ -404,11 +282,11 @@ describe('Transaction Controller', function () {
 
       const pubStub = sinon.stub(txController, 'publishTransaction').callsFake(() => {
         txController.setTxHash('1', originalValue)
-        txController.setTxStatusSubmitted('1')
+        txController.txStateManager.setTxStatusSubmitted('1')
       })
 
       txController.approveTransaction(txMeta.id).then(() => {
-        const result = txController.getTx(txMeta.id)
+        const result = txController.txStateManager.getTx(txMeta.id)
         const params = result.txParams
 
         assert.equal(params.gas, originalValue, 'gas unmodified')
@@ -431,4 +309,120 @@ describe('Transaction Controller', function () {
       }).catch(done)
     })
   })
+
+  describe('#updateAndApproveTransaction', function () {
+    let txMeta
+    beforeEach(function () {
+      txMeta = {
+        id: 1,
+        status: 'unapproved',
+        txParams: {
+          from: '0xc684832530fcbddae4b4230a47e991ddcec2831d',
+          to: '0x1678a085c290ebd122dc42cba69373b5953b831d',
+          gasPrice: '0x77359400',
+          gas: '0x7b0d',
+          nonce: '0x4b',
+        },
+        metamaskNetworkId: currentNetworkId,
+      }
+    })
+    it('should update and approve transactions', function () {
+      txController.txStateManager.addTx(txMeta)
+      txController.updateAndApproveTransaction(txMeta)
+      const tx = txController.txStateManager.getTx(1)
+      assert.equal(tx.status, 'approved')
+    })
+  })
+
+  describe('#getChainId', function () {
+    it('returns 0 when the chainId is NaN', function () {
+      txController.networkStore = new ObservableStore(NaN)
+      assert.equal(txController.getChainId(), 0)
+    })
+  })
+
+  describe('#cancelTransaction', function () {
+    beforeEach(function () {
+      txController.txStateManager._saveTxList([
+        { id: 0, status: 'unapproved', txParams: {}, metamaskNetworkId: currentNetworkId, history: [{}] },
+        { id: 1, status: 'rejected', txParams: {}, metamaskNetworkId: currentNetworkId, history: [{}] },
+        { id: 2, status: 'approved', txParams: {}, metamaskNetworkId: currentNetworkId, history: [{}] },
+        { id: 3, status: 'signed', txParams: {}, metamaskNetworkId: currentNetworkId, history: [{}] },
+        { id: 4, status: 'submitted', txParams: {}, metamaskNetworkId: currentNetworkId, history: [{}] },
+        { id: 5, status: 'confirmed', txParams: {}, metamaskNetworkId: currentNetworkId, history: [{}] },
+        { id: 6, status: 'failed', txParams: {}, metamaskNetworkId: currentNetworkId, history: [{}] },
+      ])
+    })
+
+    it('should set the transaction to rejected from unapproved', async function () {
+      await txController.cancelTransaction(0)
+      assert.equal(txController.txStateManager.getTx(0).status, 'rejected')
+    })
+
+  })
+
+  describe('#publishTransaction', function () {
+    let hash, txMeta
+    beforeEach(function () {
+      hash = '0x2a5523c6fa98b47b7d9b6c8320179785150b42a16bcff36b398c5062b65657e8'
+      txMeta = {
+        id: 1,
+        status: 'unapproved',
+        txParams: {},
+        metamaskNetworkId: currentNetworkId,
+      }
+      providerResultStub.eth_sendRawTransaction = hash
+    })
+
+    it('should publish a tx, updates the rawTx when provided a one', async function () {
+      txController.txStateManager.addTx(txMeta)
+      await txController.publishTransaction(txMeta.id)
+      const publishedTx = txController.txStateManager.getTx(1)
+      assert.equal(publishedTx.hash, hash)
+      assert.equal(publishedTx.status, 'submitted')
+    })
+  })
+
+  describe('#getBalance', function () {
+    it('gets balance', function () {
+      sinon.stub(txController.accountTracker.store, 'getState').callsFake(() => {
+        return {
+          accounts: {
+            '0x1678a085c290ebd122dc42cba69373b5953b831d': {
+              address: '0x1678a085c290ebd122dc42cba69373b5953b831d',
+              balance: '0x00000000000000056bc75e2d63100000',
+              code: '0x',
+              nonce: '0x0',
+            },
+            '0xc684832530fcbddae4b4230a47e991ddcec2831d': {
+              address: '0xc684832530fcbddae4b4230a47e991ddcec2831d',
+              balance: '0x0',
+              code: '0x',
+              nonce: '0x0',
+            },
+          },
+        }
+      })
+      assert.equal(txController.pendingTxTracker.getBalance('0x1678a085c290ebd122dc42cba69373b5953b831d'), '0x00000000000000056bc75e2d63100000')
+      assert.equal(txController.pendingTxTracker.getBalance('0xc684832530fcbddae4b4230a47e991ddcec2831d'), '0x0')
+    })
+  })
+
+  describe('#getPendingTransactions', function () {
+    beforeEach(function () {
+      txController.txStateManager._saveTxList([
+        { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 2, status: 'rejected', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 3, status: 'approved', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 4, status: 'signed', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 5, status: 'submitted', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 6, status: 'confimed', metamaskNetworkId: currentNetworkId, txParams: {} },
+        { id: 7, status: 'failed', metamaskNetworkId: currentNetworkId, txParams: {} },
+      ])
+    })
+    it('should show only submitted transactions as pending transasction', function () {
+      assert(txController.pendingTxTracker.getPendingTransactions().length, 1)
+      assert(txController.pendingTxTracker.getPendingTransactions()[0].status, 'submitted')
+    })
+  })
 })
diff --git a/test/unit/tx-state-manager-test.js b/test/unit/tx-state-manager-test.js
new file mode 100644
index 000000000..464e50ee4
--- /dev/null
+++ b/test/unit/tx-state-manager-test.js
@@ -0,0 +1,241 @@
+const assert = require('assert')
+const clone = require('clone')
+const ObservableStore = require('obs-store')
+const TxStateManager = require('../../app/scripts/lib/tx-state-manager')
+const txStateHistoryHelper = require('../../app/scripts/lib/tx-state-history-helper')
+const noop = () => true
+
+describe('TransactionStateManger', function () {
+  let txStateManager
+  const currentNetworkId = 42
+  const otherNetworkId = 2
+
+  beforeEach(function () {
+    txStateManager = new TxStateManager({
+      initState: {
+        transactions: [],
+      },
+      txHistoryLimit: 10,
+      getNetwork: () => currentNetworkId
+    })
+  })
+
+  describe('#setTxStatusSigned', function () {
+    it('sets the tx status to signed', function () {
+      let tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
+      txStateManager.addTx(tx, noop)
+      txStateManager.setTxStatusSigned(1)
+      let result = txStateManager.getTxList()
+      assert.ok(Array.isArray(result))
+      assert.equal(result.length, 1)
+      assert.equal(result[0].status, 'signed')
+    })
+
+    it('should emit a signed event to signal the exciton of callback', (done) => {
+      let tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
+      const noop = function () {
+        assert(true, 'event listener has been triggered and noop executed')
+        done()
+      }
+      txStateManager.addTx(tx)
+      txStateManager.on('1:signed', noop)
+      txStateManager.setTxStatusSigned(1)
+
+    })
+  })
+
+  describe('#setTxStatusRejected', function () {
+    it('sets the tx status to rejected', function () {
+      let tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
+      txStateManager.addTx(tx)
+      txStateManager.setTxStatusRejected(1)
+      let result = txStateManager.getTxList()
+      assert.ok(Array.isArray(result))
+      assert.equal(result.length, 1)
+      assert.equal(result[0].status, 'rejected')
+    })
+
+    it('should emit a rejected event to signal the exciton of callback', (done) => {
+      let tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
+      txStateManager.addTx(tx)
+      const noop = function (err, txId) {
+        assert(true, 'event listener has been triggered and noop executed')
+        done()
+      }
+      txStateManager.on('1:rejected', noop)
+      txStateManager.setTxStatusRejected(1)
+    })
+  })
+
+  describe('#getFullTxList', function () {
+    it('when new should return empty array', function () {
+      let result = txStateManager.getTxList()
+      assert.ok(Array.isArray(result))
+      assert.equal(result.length, 0)
+    })
+  })
+
+  describe('#getTxList', function () {
+    it('when new should return empty array', function () {
+      let result = txStateManager.getTxList()
+      assert.ok(Array.isArray(result))
+      assert.equal(result.length, 0)
+    })
+  })
+
+  describe('#addTx', function () {
+    it('adds a tx returned in getTxList', function () {
+      let tx = { id: 1, status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
+      txStateManager.addTx(tx, noop)
+      let result = txStateManager.getTxList()
+      assert.ok(Array.isArray(result))
+      assert.equal(result.length, 1)
+      assert.equal(result[0].id, 1)
+    })
+
+    it('does not override txs from other networks', function () {
+      let tx = { id: 1, status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
+      let tx2 = { id: 2, status: 'confirmed', metamaskNetworkId: otherNetworkId, txParams: {} }
+      txStateManager.addTx(tx, noop)
+      txStateManager.addTx(tx2, noop)
+      let result = txStateManager.getFullTxList()
+      let result2 = txStateManager.getTxList()
+      assert.equal(result.length, 2, 'txs were deleted')
+      assert.equal(result2.length, 1, 'incorrect number of txs on network.')
+    })
+
+    it('cuts off early txs beyond a limit', function () {
+      const limit = txStateManager.txHistoryLimit
+      for (let i = 0; i < limit + 1; i++) {
+        const tx = { id: i, time: new Date(), status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
+        txStateManager.addTx(tx, noop)
+      }
+      let result = txStateManager.getTxList()
+      assert.equal(result.length, limit, `limit of ${limit} txs enforced`)
+      assert.equal(result[0].id, 1, 'early txs truncted')
+    })
+
+    it('cuts off early txs beyond a limit whether or not it is confirmed or rejected', function () {
+      const limit = txStateManager.txHistoryLimit
+      for (let i = 0; i < limit + 1; i++) {
+        const tx = { id: i, time: new Date(), status: 'rejected', metamaskNetworkId: currentNetworkId, txParams: {} }
+        txStateManager.addTx(tx, noop)
+      }
+      let result = txStateManager.getTxList()
+      assert.equal(result.length, limit, `limit of ${limit} txs enforced`)
+      assert.equal(result[0].id, 1, 'early txs truncted')
+    })
+
+    it('cuts off early txs beyond a limit but does not cut unapproved txs', function () {
+      let unconfirmedTx = { id: 0, time: new Date(), status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
+      txStateManager.addTx(unconfirmedTx, noop)
+      const limit = txStateManager.txHistoryLimit
+      for (let i = 1; i < limit + 1; i++) {
+        const tx = { id: i, time: new Date(), status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }
+        txStateManager.addTx(tx, noop)
+      }
+      let result = txStateManager.getTxList()
+      assert.equal(result.length, limit, `limit of ${limit} txs enforced`)
+      assert.equal(result[0].id, 0, 'first tx should still be there')
+      assert.equal(result[0].status, 'unapproved', 'first tx should be unapproved')
+      assert.equal(result[1].id, 2, 'early txs truncted')
+    })
+  })
+
+  describe('#updateTx', function () {
+    it('replaces the tx with the same id', function () {
+      txStateManager.addTx({ id: '1', status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
+      txStateManager.addTx({ id: '2', status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
+      const txMeta = txStateManager.getTx('1')
+      txMeta.hash = 'foo'
+      txStateManager.updateTx(txMeta)
+      let result = txStateManager.getTx('1')
+      assert.equal(result.hash, 'foo')
+    })
+
+    it('updates gas price and adds history items', function () {
+      const originalGasPrice = '0x01'
+      const desiredGasPrice = '0x02'
+
+      const txMeta = {
+        id: '1',
+        status: 'unapproved',
+        metamaskNetworkId: currentNetworkId,
+        txParams: {
+          gasPrice: originalGasPrice,
+        },
+      }
+
+      const updatedMeta = clone(txMeta)
+
+      txStateManager.addTx(txMeta)
+      const updatedTx = txStateManager.getTx('1')
+      // verify tx was initialized correctly
+      assert.equal(updatedTx.history.length, 1, 'one history item (initial)')
+      assert.equal(Array.isArray(updatedTx.history[0]), false, 'first history item is initial state')
+      assert.deepEqual(updatedTx.history[0], txStateHistoryHelper.snapshotFromTxMeta(updatedTx), 'first history item is initial state')
+      // modify value and updateTx
+      updatedTx.txParams.gasPrice = desiredGasPrice
+      txStateManager.updateTx(updatedTx)
+      // check updated value
+      const result = txStateManager.getTx('1')
+      assert.equal(result.txParams.gasPrice, desiredGasPrice, 'gas price updated')
+      // validate history was updated
+      assert.equal(result.history.length, 2, 'two history items (initial + diff)')
+      const expectedEntry = { op: 'replace', path: '/txParams/gasPrice', value: desiredGasPrice }
+      assert.deepEqual(result.history[1], [expectedEntry], 'two history items (initial + diff)')
+    })
+  })
+
+  describe('#getUnapprovedTxList', function () {
+    it('returns unapproved txs in a hash', function () {
+      txStateManager.addTx({ id: '1', status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
+      txStateManager.addTx({ id: '2', status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
+      const result = txStateManager.getUnapprovedTxList()
+      assert.equal(typeof result, 'object')
+      assert.equal(result['1'].status, 'unapproved')
+      assert.equal(result['2'], undefined)
+    })
+  })
+
+  describe('#getTx', function () {
+    it('returns a tx with the requested id', function () {
+      txStateManager.addTx({ id: '1', status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
+      txStateManager.addTx({ id: '2', status: 'confirmed', metamaskNetworkId: currentNetworkId, txParams: {} }, noop)
+      assert.equal(txStateManager.getTx('1').status, 'unapproved')
+      assert.equal(txStateManager.getTx('2').status, 'confirmed')
+    })
+  })
+
+  describe('#getFilteredTxList', function () {
+    it('returns a tx with the requested data', function () {
+      const txMetas = [
+        { id: 0, status: 'unapproved', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
+        { id: 1, status: 'unapproved', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
+        { id: 2, status: 'unapproved', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
+        { id: 3, status: 'unapproved', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
+        { id: 4, status: 'unapproved', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
+        { id: 5, status: 'confirmed', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
+        { id: 6, status: 'confirmed', txParams: { from: '0xaa', to: '0xbb' }, metamaskNetworkId: currentNetworkId },
+        { id: 7, status: 'confirmed', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
+        { id: 8, status: 'confirmed', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
+        { id: 9, status: 'confirmed', txParams: { from: '0xbb', to: '0xaa' }, metamaskNetworkId: currentNetworkId },
+      ]
+      txMetas.forEach((txMeta) => txStateManager.addTx(txMeta, noop))
+      let filterParams
+
+      filterParams = { status: 'unapproved', from: '0xaa' }
+      assert.equal(txStateManager.getFilteredTxList(filterParams).length, 3, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
+      filterParams = { status: 'unapproved', to: '0xaa' }
+      assert.equal(txStateManager.getFilteredTxList(filterParams).length, 2, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
+      filterParams = { status: 'confirmed', from: '0xbb' }
+      assert.equal(txStateManager.getFilteredTxList(filterParams).length, 3, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
+      filterParams = { status: 'confirmed' }
+      assert.equal(txStateManager.getFilteredTxList(filterParams).length, 5, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
+      filterParams = { from: '0xaa' }
+      assert.equal(txStateManager.getFilteredTxList(filterParams).length, 5, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
+      filterParams = { to: '0xaa' }
+      assert.equal(txStateManager.getFilteredTxList(filterParams).length, 5, `getFilteredTxList - ${JSON.stringify(filterParams)}`)
+    })
+  })
+})
\ No newline at end of file
diff --git a/test/unit/tx-utils-test.js b/test/unit/tx-utils-test.js
index 43128b977..8ca13412e 100644
--- a/test/unit/tx-utils-test.js
+++ b/test/unit/tx-utils-test.js
@@ -1,8 +1,10 @@
 const assert = require('assert')
+const Transaction = require('ethereumjs-tx')
 const BN = require('bn.js')
 
+
 const { hexToBn, bnToHex } = require('../../app/scripts/lib/util')
-const TxUtils = require('../../app/scripts/lib/tx-utils')
+const TxUtils = require('../../app/scripts/lib/tx-gas-utils')
 
 
 describe('txUtils', function () {
@@ -28,7 +30,7 @@ describe('txUtils', function () {
         nonce: '0x3',
         chainId: 42,
       }
-      const ethTx = txUtils.buildEthTxFromParams(txParams)
+      const ethTx = new Transaction(txParams)
       assert.equal(ethTx.getChainId(), 42, 'chainId is set from tx params')
     })
   })