diff --git a/app/scripts/background.js b/app/scripts/background.js
index 7cb25d8bf..854b679da 100644
--- a/app/scripts/background.js
+++ b/app/scripts/background.js
@@ -23,7 +23,7 @@ const controller = new MetamaskController({
   loadData,
 })
 const keyringController = controller.keyringController
-
+const txManager = controller.txManager
 function triggerUi () {
   if (!popupIsOpen) notification.show()
 }
@@ -97,12 +97,11 @@ function setupControllerConnection (stream) {
 // plugin badge text
 //
 
-keyringController.on('update', updateBadge)
+txManager.on('update', updateBadge)
 
 function updateBadge () {
   var label = ''
-  var unconfTxs = controller.configManager.unconfirmedTxs()
-  var unconfTxLen = Object.keys(unconfTxs).length
+  var unconfTxLen = controller.txManager.unConftxCount
   var unconfMsgs = messageManager.unconfirmedMsgs()
   var unconfMsgLen = Object.keys(unconfMsgs).length
   var count = unconfTxLen + unconfMsgLen
@@ -113,6 +112,25 @@ function updateBadge () {
   extension.browserAction.setBadgeBackgroundColor({ color: '#506F8B' })
 }
 
+// txManger :: tx approvals and rejection cb's
+
+txManager.on('signed', function (txId) {
+  var approvalCb = this._unconfTxCbs[txId]
+
+  approvalCb(null, true)
+  // clean up
+  delete this._unconfTxCbs[txId]
+})
+
+txManager.on('rejected', function (txId) {
+  var approvalCb = this._unconfTxCbs[txId]
+  approvalCb(null, false)
+  // clean up
+  delete this._unconfTxCbs[txId]
+})
+
+// data :: setters/getters
+
 function loadData () {
   var oldData = getOldStyleData()
   var newData
diff --git a/app/scripts/keyring-controller.js b/app/scripts/keyring-controller.js
index 40c9695dd..37b3a947f 100644
--- a/app/scripts/keyring-controller.js
+++ b/app/scripts/keyring-controller.js
@@ -1,6 +1,4 @@
-const async = require('async')
 const ethUtil = require('ethereumjs-util')
-const EthQuery = require('eth-query')
 const bip39 = require('bip39')
 const Transaction = require('ethereumjs-tx')
 const EventEmitter = require('events').EventEmitter
@@ -36,7 +34,7 @@ module.exports = class KeyringController extends EventEmitter {
     this.ethStore = opts.ethStore
     this.encryptor = encryptor
     this.keyringTypes = keyringTypes
-
+    this.txManager = opts.txManager
     this.keyrings = []
     this.identities = {} // Essentially a name hash
 
@@ -73,7 +71,7 @@ module.exports = class KeyringController extends EventEmitter {
   // or accept a state-resolving promise to consume their results.
   //
   // Not all methods end with this, that might be a nice refactor.
-  fullUpdate() {
+  fullUpdate () {
     this.emit('update')
     return Promise.resolve(this.getState())
   }
@@ -102,8 +100,8 @@ module.exports = class KeyringController extends EventEmitter {
       isInitialized: (!!wallet || !!vault),
       isUnlocked: Boolean(this.password),
       isDisclaimerConfirmed: this.configManager.getConfirmedDisclaimer(), // AUDIT this.configManager.getConfirmedDisclaimer(),
-      unconfTxs: this.configManager.unconfirmedTxs(),
-      transactions: this.configManager.getTxList(),
+      transactions: this.txManager.getTxList(),
+      unconfTxs: this.txManager.getUnapprovedTxList(),
       unconfMsgs: messageManager.unconfirmedMsgs(),
       messages: messageManager.getMsgList(),
       selectedAccount: address,
@@ -341,7 +339,7 @@ module.exports = class KeyringController extends EventEmitter {
   // Caches the requesting Dapp's callback, `onTxDoneCb`, for resolution later.
   addUnconfirmedTransaction (txParams, onTxDoneCb, cb) {
     const configManager = this.configManager
-
+    const txManager = this.txManager
     // create txData obj with parameters and meta data
     var time = (new Date()).getTime()
     var txId = createId()
@@ -351,95 +349,26 @@ module.exports = class KeyringController extends EventEmitter {
       id: txId,
       txParams: txParams,
       time: time,
-      status: 'unconfirmed',
+      status: 'unapproved',
       gasMultiplier: configManager.getGasMultiplier() || 1,
       metamaskNetworkId: this.getNetwork(),
     }
-
     // keep the onTxDoneCb around for after approval/denial (requires user interaction)
     // This onTxDoneCb fires completion to the Dapp's write operation.
-    this._unconfTxCbs[txId] = onTxDoneCb
-
-    var provider = this.ethStore._query.currentProvider
-    var query = new EthQuery(provider)
-
+    txManager.txProviderUtils.analyzeGasUsage(txData, this.txDidComplete.bind(this, txData, onTxDoneCb, cb))
     // calculate metadata for tx
-    this.analyzeTxGasUsage(query, txData, this.txDidComplete.bind(this, txData, cb))
-  }
-
-  estimateTxGas (query, txData, blockGasLimitHex, cb) {
-    const txParams = txData.txParams
-    // check if gasLimit is already specified
-    txData.gasLimitSpecified = Boolean(txParams.gas)
-    // if not, fallback to block gasLimit
-    if (!txData.gasLimitSpecified) {
-      txParams.gas = blockGasLimitHex
-    }
-    // run tx, see if it will OOG
-    query.estimateGas(txParams, cb)
-  }
-
-  checkForTxGasError (txData, estimatedGasHex, cb) {
-    txData.estimatedGas = estimatedGasHex
-    // all gas used - must be an error
-    if (estimatedGasHex === txData.txParams.gas) {
-      txData.simulationFails = true
-    }
-    cb()
-  }
-
-  setTxGas (txData, blockGasLimitHex, cb) {
-    const txParams = txData.txParams
-    // if OOG, nothing more to do
-    if (txData.simulationFails) {
-      cb()
-      return
-    }
-    // if gasLimit was specified and doesnt OOG,
-    // use original specified amount
-    if (txData.gasLimitSpecified) {
-      txData.estimatedGas = txParams.gas
-      cb()
-      return
-    }
-    // if gasLimit not originally specified,
-    // try adding an additional gas buffer to our estimation for safety
-    const estimatedGasBn = new BN(ethUtil.stripHexPrefix(txData.estimatedGas), 16)
-    const blockGasLimitBn = new BN(ethUtil.stripHexPrefix(blockGasLimitHex), 16)
-    const estimationWithBuffer = new BN(this.addGasBuffer(estimatedGasBn), 16)
-    // added gas buffer is too high
-    if (estimationWithBuffer.gt(blockGasLimitBn)) {
-      txParams.gas = txData.estimatedGas
-    // added gas buffer is safe
-    } else {
-      const gasWithBufferHex = ethUtil.intToHex(estimationWithBuffer)
-      txParams.gas = gasWithBufferHex
-    }
-    cb()
-    return
   }
 
-  txDidComplete (txData, cb, err) {
+  txDidComplete (txData, onTxDoneCb, cb, err) {
     if (err) return cb(err)
-    const configManager = this.configManager
-    configManager.addTx(txData)
+    const txManager = this.txManager
+    txManager.addTx(txData, onTxDoneCb)
     // signal update
     this.emit('update')
     // signal completion of add tx
     cb(null, txData)
   }
 
-  analyzeTxGasUsage (query, txData, cb) {
-    query.getBlockByNumber('latest', true, (err, block) => {
-      if (err) return cb(err)
-      async.waterfall([
-        this.estimateTxGas.bind(this, query, txData, block.gasLimit),
-        this.checkForTxGasError.bind(this, txData),
-        this.setTxGas.bind(this, txData, block.gasLimit),
-      ], cb)
-    })
-  }
-
   // Cancel Transaction
   // @string txId
   // @function cb
@@ -448,14 +377,8 @@ module.exports = class KeyringController extends EventEmitter {
   //
   // Forgets any tx matching `txId`.
   cancelTransaction (txId, cb) {
-    const configManager = this.configManager
-    var approvalCb = this._unconfTxCbs[txId] || noop
-
-    // reject tx
-    approvalCb(null, false)
-    // clean up
-    configManager.rejectTx(txId)
-    delete this._unconfTxCbs[txId]
+    const txManager = this.txManager
+    txManager.setTxStatusRejected(txId)
 
     if (cb && typeof cb === 'function') {
       cb()
@@ -473,16 +396,10 @@ module.exports = class KeyringController extends EventEmitter {
   //
   // Calls back the cached Dapp's confirmation callback, also.
   approveTransaction (txId, cb) {
-    const configManager = this.configManager
-    var approvalCb = this._unconfTxCbs[txId] || noop
-
-    // accept tx
-    cb()
-    approvalCb(null, true)
-    // clean up
-    configManager.confirmTx(txId)
-    delete this._unconfTxCbs[txId]
+    const txManager = this.txManager
+    txManager.setTxStatusSigned(txId)
     this.emit('update')
+    cb()
   }
 
   signTransaction (txParams, cb) {
@@ -510,9 +427,9 @@ module.exports = class KeyringController extends EventEmitter {
       .then((tx) => {
         // Add the tx hash to the persisted meta-tx object
         var txHash = ethUtil.bufferToHex(tx.hash())
-        var metaTx = this.configManager.getTx(txParams.metamaskId)
+        var metaTx = this.txManager.getTx(txParams.metamaskId)
         metaTx.hash = txHash
-        this.configManager.updateTx(metaTx)
+        this.txManager.updateTx(metaTx)
 
         // return raw serialized tx
         var rawTx = ethUtil.bufferToHex(tx.serialize())
@@ -586,7 +503,6 @@ module.exports = class KeyringController extends EventEmitter {
   // Attempts to sign the provided @object msgParams.
   signMessage (msgParams, cb) {
     try {
-
       const msgId = msgParams.metamaskId
       delete msgParams.metamaskId
       const approvalCb = this._unconfMsgCbs[msgId] || noop
diff --git a/app/scripts/lib/config-manager.js b/app/scripts/lib/config-manager.js
index 59cc2b63c..913a76a6e 100644
--- a/app/scripts/lib/config-manager.js
+++ b/app/scripts/lib/config-manager.js
@@ -209,61 +209,12 @@ ConfigManager.prototype.getTxList = function () {
   }
 }
 
-ConfigManager.prototype.unconfirmedTxs = function () {
-  var transactions = this.getTxList()
-  return transactions.filter(tx => tx.status === 'unconfirmed')
-  .reduce((result, tx) => { result[tx.id] = tx; return result }, {})
-}
-
-ConfigManager.prototype._saveTxList = function (txList) {
+ConfigManager.prototype.setTxList = function (txList) {
   var data = this.migrator.getData()
   data.transactions = txList
   this.setData(data)
 }
 
-ConfigManager.prototype.addTx = function (tx) {
-  var transactions = this.getTxList()
-  while (transactions.length > this.txLimit - 1) {
-    transactions.shift()
-  }
-  transactions.push(tx)
-  this._saveTxList(transactions)
-}
-
-ConfigManager.prototype.getTx = function (txId) {
-  var transactions = this.getTxList()
-  var matching = transactions.filter(tx => tx.id === txId)
-  return matching.length > 0 ? matching[0] : null
-}
-
-ConfigManager.prototype.confirmTx = function (txId) {
-  this._setTxStatus(txId, 'confirmed')
-}
-
-ConfigManager.prototype.rejectTx = function (txId) {
-  this._setTxStatus(txId, 'rejected')
-}
-
-ConfigManager.prototype._setTxStatus = function (txId, status) {
-  var tx = this.getTx(txId)
-  tx.status = status
-  this.updateTx(tx)
-}
-
-ConfigManager.prototype.updateTx = function (tx) {
-  var transactions = this.getTxList()
-  var found, index
-  transactions.forEach((otherTx, i) => {
-    if (otherTx.id === tx.id) {
-      found = true
-      index = i
-    }
-  })
-  if (found) {
-    transactions[index] = tx
-  }
-  this._saveTxList(transactions)
-}
 
 // wallet nickname methods
 
diff --git a/app/scripts/lib/idStore.js b/app/scripts/lib/idStore.js
index d36504f13..71bee8026 100644
--- a/app/scripts/lib/idStore.js
+++ b/app/scripts/lib/idStore.js
@@ -13,6 +13,8 @@ const autoFaucet = require('./auto-faucet')
 const messageManager = require('./message-manager')
 const DEFAULT_RPC = 'https://testrpc.metamask.io/'
 const IdManagement = require('./id-management')
+const TxManager = require('../transaction-manager')
+
 
 module.exports = IdentityStore
 
@@ -36,6 +38,11 @@ function IdentityStore (opts = {}) {
   }
 
   // not part of serilized metamask state - only kept in memory
+  this.txManager = new TxManager({
+    TxListFromStore: opts.configManager.getTxList(),
+    setTxList: opts.configManager.setTxList.bind(opts.configManager),
+    txLimit: 40,
+  })
   this._unconfTxCbs = {}
   this._unconfMsgCbs = {}
 }
@@ -87,6 +94,7 @@ IdentityStore.prototype.recoverFromSeed = function (password, seed, cb) {
 
 IdentityStore.prototype.setStore = function (store) {
   this._ethStore = store
+  this.txManager.setProvider(this._ethStore._query.currentProvider)
 }
 
 IdentityStore.prototype.clearSeedWordCache = function (cb) {
@@ -97,14 +105,15 @@ IdentityStore.prototype.clearSeedWordCache = function (cb) {
 
 IdentityStore.prototype.getState = function () {
   const configManager = this.configManager
+  const TxManager = this.txManager
   var seedWords = this.getSeedIfUnlocked()
   return clone(extend(this._currentState, {
     isInitialized: !!configManager.getWallet() && !seedWords,
     isUnlocked: this._isUnlocked(),
     seedWords: seedWords,
     isDisclaimerConfirmed: configManager.getConfirmedDisclaimer(),
-    unconfTxs: configManager.unconfirmedTxs(),
-    transactions: configManager.getTxList(),
+    unconfTxs: TxManager.getUnapprovedTxList(),
+    transactions: TxManager.getTxList(),
     unconfMsgs: messageManager.unconfirmedMsgs(),
     messages: messageManager.getMsgList(),
     selectedAddress: configManager.getSelectedAccount(),
diff --git a/app/scripts/lib/provider-utils.js b/app/scripts/lib/provider-utils.js
new file mode 100644
index 000000000..d1678c964
--- /dev/null
+++ b/app/scripts/lib/provider-utils.js
@@ -0,0 +1,106 @@
+const async = require('async')
+const EthQuery = require('eth-query')
+const ethUtil = require('ethereumjs-util')
+const BN = ethUtil.BN
+const ethBinToOps = require('eth-bin-to-ops')
+
+module.exports = class txProviderUtils {
+  constructor (provider) {
+    this.provider = provider
+    this.query = new EthQuery(provider)
+  }
+  analyzeGasUsage (txData, cb) {
+    var self = this
+    this.query.getBlockByNumber('latest', true, (err, block) => {
+      if (err) return cb(err)
+      async.waterfall([
+        self.estimateTxGas.bind(self, txData, block.gasLimit),
+        self.checkForTxGasError.bind(self, txData),
+        self.setTxGas.bind(self, txData, block.gasLimit),
+      ], cb)
+    })
+  }
+
+    // perform static analyis on the target contract code
+  analyzeForDelegateCall (txParams, cb) {
+    if (txParams.to) {
+      this.query.getCode(txParams.to, function (err, result) {
+        if (err) return cb(err)
+
+        var code = ethUtil.toBuffer(result)
+        if (code !== '0x') {
+          var ops = ethBinToOps(code)
+          var containsDelegateCall = ops.some((op) => op.name === 'DELEGATECALL')
+          cb(containsDelegateCall)
+        } else {
+          cb()
+        }
+      })
+    } else {
+      cb()
+    }
+  }
+
+  estimateTxGas (txData, blockGasLimitHex, cb) {
+    const txParams = txData.txParams
+    // check if gasLimit is already specified
+    txData.gasLimitSpecified = Boolean(txParams.gas)
+    // if not, fallback to block gasLimit
+    if (!txData.gasLimitSpecified) {
+      txParams.gas = blockGasLimitHex
+    }
+    // run tx, see if it will OOG
+    this.query.estimateGas(txParams, cb)
+  }
+
+  checkForTxGasError (txData, estimatedGasHex, cb) {
+    txData.estimatedGas = estimatedGasHex
+    // all gas used - must be an error
+    if (estimatedGasHex === txData.txParams.gas) {
+      txData.simulationFails = true
+    }
+    cb()
+  }
+
+  handleFork (block) {
+
+  }
+
+  setTxGas (txData, blockGasLimitHex, cb) {
+    const txParams = txData.txParams
+    // if OOG, nothing more to do
+    if (txData.simulationFails) {
+      cb()
+      return
+    }
+    // if gasLimit was specified and doesnt OOG,
+    // use original specified amount
+    if (txData.gasLimitSpecified) {
+      txData.estimatedGas = txParams.gas
+      cb()
+      return
+    }
+    // if gasLimit not originally specified,
+    // try adding an additional gas buffer to our estimation for safety
+    const estimatedGasBn = new BN(ethUtil.stripHexPrefix(txData.estimatedGas), 16)
+    const blockGasLimitBn = new BN(ethUtil.stripHexPrefix(blockGasLimitHex), 16)
+    const estimationWithBuffer = new BN(this.addGasBuffer(estimatedGasBn), 16)
+    // added gas buffer is too high
+    if (estimationWithBuffer.gt(blockGasLimitBn)) {
+      txParams.gas = txData.estimatedGas
+    // added gas buffer is safe
+    } else {
+      const gasWithBufferHex = ethUtil.intToHex(estimationWithBuffer)
+      txParams.gas = gasWithBufferHex
+    }
+    cb()
+    return
+  }
+
+  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))
+  }
+}
diff --git a/app/scripts/metamask-controller.js b/app/scripts/metamask-controller.js
index ae761c753..3b70f63db 100644
--- a/app/scripts/metamask-controller.js
+++ b/app/scripts/metamask-controller.js
@@ -3,6 +3,7 @@ const EthStore = require('eth-store')
 const MetaMaskProvider = require('web3-provider-engine/zero.js')
 const KeyringController = require('./keyring-controller')
 const messageManager = require('./lib/message-manager')
+const TxManager = require('./transaction-manager')
 const HostStore = require('./lib/remote-store.js').HostStore
 const Web3 = require('web3')
 const ConfigManager = require('./lib/config-manager')
@@ -18,13 +19,21 @@ module.exports = class MetamaskController {
     this.opts = opts
     this.listeners = []
     this.configManager = new ConfigManager(opts)
+    this.txManager = new TxManager({
+      TxListFromStore: this.configManager.getTxList(),
+      txLimit: this.configManager.txLimit,
+      setTxList: this.configManager.setTxList.bind(this.configManager),
+    })
+
     this.keyringController = new KeyringController({
       configManager: this.configManager,
+      txManager: this.txManager,
       getNetwork: this.getStateNetwork.bind(this),
     })
     this.provider = this.initializeProvider(opts)
     this.ethStore = new EthStore(this.provider)
     this.keyringController.setStore(this.ethStore)
+    this.txManager.setProvider(this.provider)
     this.getNetwork()
     this.messageManager = messageManager
     this.publicConfigStore = this.initPublicConfigStore()
@@ -49,7 +58,7 @@ module.exports = class MetamaskController {
 
   getApi () {
     const keyringController = this.keyringController
-
+    const txManager = this.txManager
     return {
       getState: (cb) => { cb(null, this.getState()) },
       setRpcTarget: this.setRpcTarget.bind(this),
@@ -81,6 +90,9 @@ module.exports = class MetamaskController {
       signMessage: keyringController.signMessage.bind(keyringController),
       cancelMessage: keyringController.cancelMessage.bind(keyringController),
 
+      // forward directly to txManager
+      getUnapprovedTxList: txManager.getTxList.bind(txManager),
+      getFilterdTxList: txManager.getFilterdTxList.bind(txManager),
       // coinbase
       buyEth: this.buyEth.bind(this),
       // shapeshift
@@ -154,7 +166,7 @@ module.exports = class MetamaskController {
     var web3 = new Web3(provider)
     this.web3 = web3
     keyringController.web3 = web3
-
+    this.txManager.web3 = web3
     provider.on('block', this.processBlock.bind(this))
     provider.on('error', this.getNetwork.bind(this))
 
diff --git a/app/scripts/transaction-manager.js b/app/scripts/transaction-manager.js
new file mode 100644
index 000000000..07e588679
--- /dev/null
+++ b/app/scripts/transaction-manager.js
@@ -0,0 +1,179 @@
+const EventEmitter = require('events')
+const extend = require('xtend')
+const TxProviderUtil = require('./lib/provider-utils')
+
+module.exports = class TransactionManager extends EventEmitter {
+  constructor (opts) {
+    super()
+    this.txList = opts.TxListFromStore || []
+    this._persistTxList = opts.setTxList
+    this._unconfTxCbs = {}
+    this.txLimit = opts.txLimit
+    this.provider = opts.provider
+  }
+
+//   Returns the tx list
+  getTxList () {
+    return this.txList
+  }
+
+  // Saves the new/updated txList.
+  // Function is intended only for internal use
+  _saveTxList (txList) {
+    this.txList = txList
+    this._persistTxList(txList)
+  }
+
+  // Adds a tx to the txlist
+  addTx (txData, onTxDoneCb) {
+    var txList = this.getTxList()
+    var txLimit = this.txLimit
+    if (txList.length > txLimit - 1) {
+      txList.shift()
+    }
+    txList.push(txData)
+    this._saveTxList(txList)
+    this.addOnTxDoneCb(txData.id, onTxDoneCb)
+    this.emit('unapproved', txData)
+    this.emit('update')
+  }
+
+  getTx (txId, cb) {
+    var txList = this.getTxList()
+    var tx = txList.find((tx) => tx.id === txId)
+    return cb ? cb(tx) : tx
+  }
+
+  updateTx (txData) {
+    var txId = txData.id
+    var txList = this.getTxList()
+
+    var updatedTxList = txList.map((tx) => {
+      if (tx.id === txId) {
+        tx = txData
+      }
+      return tx
+    })
+    this._saveTxList(updatedTxList)
+  }
+
+  get unConftxCount () {
+    return Object.keys(this.getUnapprovedTxList()).length
+  }
+
+  get pendingTxCount () {
+    return this.getTxsByMetaData('status', 'signed').length
+  }
+
+  getUnapprovedTxList () {
+    var txList = this.getTxList()
+    return txList.filter((tx) => {
+      return tx.status === 'unapproved'
+    }).reduce((result, tx) => {
+      result[tx.id] = tx
+      return result
+    }, {})
+  }
+
+  getFilterdTxList (opts) {
+    var filteredTxList
+    Object.keys(opts).forEach((key) => {
+      filteredTxList = this.getTxsByMetaData(key, opts[key], filteredTxList)
+    })
+    return filteredTxList
+  }
+
+  getTxsByMetaData (key, value, txList = this.getTxList()) {
+    return txList.filter((tx) => {
+      if (key in tx.txParams) {
+        return tx.txParams[key] === value
+      } else {
+        return tx[key] === value
+      }
+    })
+  }
+
+  addOnTxDoneCb (txId, cb) {
+    this._unconfTxCbs[txId] = cb || noop
+  }
+
+  //   should return the tx
+
+  //   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!
+  //     // - `'signed'` the tx is signed
+  //     // - `'submitted'` the tx is sent to a server
+  //     // - `'confirmed'` the tx has been included in a block.
+  setTxStatus (txId, status) {
+    var txData = this.getTx(txId)
+    txData.status = status
+    this.emit(status, txId)
+    this.updateTx(txData, status)
+  }
+
+
+  //   should return the status of the tx.
+  getTxStatus (txId, cb) {
+    const txData = this.getTx(txId)
+    return cb ? cb(txData.staus) : txData.status
+  }
+
+
+  //   should update the status of the tx to 'signed'.
+  setTxStatusSigned (txId) {
+    this.setTxStatus(txId, 'signed')
+    this.emit('update')
+  }
+
+  //     should update the status of the tx to 'rejected'.
+  setTxStatusRejected (txId) {
+    this.setTxStatus(txId, 'rejected')
+    this.emit('update')
+  }
+
+  setTxStatusConfirmed (txId) {
+    this.setTxStatus(txId, 'confirmed')
+    // this.removeListener(`check${txId}`, this.checkForTxInBlock)
+  }
+
+  // merges txParams obj onto txData.txParams
+  // use extend to ensure that all fields are filled
+  updateTxParams (txId, txParams) {
+    var txData = this.getTx(txId)
+    txData.txParams = extend(txData, txParams)
+    this.updateTx(txData)
+  }
+
+  setProvider (provider) {
+    this.provider = provider
+    this.txProviderUtils = new TxProviderUtil(provider)
+    this.provider.on('block', this.checkForTxInBlock.bind(this))
+  }
+
+  checkForTxInBlock () {
+    var signedTxList = this.getFilterdTxList({status: 'signed'})
+    if (!signedTxList.length) return
+    var self = this
+    signedTxList.forEach((tx) => {
+      var txHash = tx.hash
+      var txId = tx.id
+      if (!txHash) return
+      // var d
+      this.txProviderUtils.query.getTransactionByHash(txHash, (err, txData) => {
+        if (err) {
+          tx
+
+          return console.error(err)
+        }
+        if (txData.blockNumber !== null) {
+          self.setTxStatusConfirmed(txId)
+        }
+      })
+    })
+  }
+}
+
+function noop () {}