2 files changed, 9 insertions, 5 deletions
diff --git a/app/scripts/controllers/computed-balances.js b/app/scripts/controllers/computed-balances.js
index 9855f715e..907b087cf 100644
--- a/app/scripts/controllers/computed-balances.js
+++ b/app/scripts/controllers/computed-balances.js
@@ -32,13 +32,13 @@ class ComputedbalancesController {
     this.accountTracker.store.subscribe(this.syncAllAccountsFromStore.bind(this))
   }
 
-  syncAllAccountsFromStore(store) {
+  syncAllAccountsFromStore (store) {
     const upstream = Object.keys(store.accounts)
     const balances = Object.keys(this.balances)
     .map(address => this.balances[address])
 
     // Follow new addresses
-    for (let address in balances) {
+    for (const address in balances) {
       this.trackAddressIfNotAlready(address)
     }
 
@@ -58,14 +58,14 @@ class ComputedbalancesController {
   }
 
   trackAddress (address) {
-    let updater = new BalanceController({
+    const updater = new BalanceController({
       address,
       accountTracker: this.accountTracker,
       txController: this.txController,
       blockTracker: this.blockTracker,
     })
     updater.store.subscribe((accountBalance) => {
-      let newState = this.store.getState()
+      const newState = this.store.getState()
       newState.computedBalances[address] = accountBalance
       this.store.updateState(newState)
     })
diff --git a/app/scripts/controllers/network.js b/app/scripts/controllers/network.js
index 0f9db4d53..23afdc12b 100644
--- a/app/scripts/controllers/network.js
+++ b/app/scripts/controllers/network.js
@@ -51,6 +51,10 @@ module.exports = class NetworkController extends EventEmitter {
   }
 
   lookupNetwork () {
+    // Prevent firing when provider is not defined.
+    if (!this.ethQuery || !this.ethQuery.sendAsync) {
+      return
+    }
     this.ethQuery.sendAsync({ method: 'net_version' }, (err, network) => {
       if (err) return this.setNetworkState('loading')
       log.info('web3.getNetwork returned ' + network)
@@ -101,7 +105,7 @@ module.exports = class NetworkController extends EventEmitter {
     this.emit('networkDidChange')
   }
 
-  _configureStandardProvider(_providerParams) {
+  _configureStandardProvider (_providerParams) {
     const providerParams = extend(this._baseProviderParams, _providerParams)
     const provider = createMetamaskProvider(providerParams)
     this._setProvider(provider)