Nodeify and promisify calls to background.

app/scripts/metamask-controller.js

@@ -244,8 +244,6 @@ module.exports = class MetamaskController extends EventEmitter {
     return {
       // etc
       getState:              (cb) => cb(null, this.getState()),
-      setDefaultRpc:         this.setDefaultRpc.bind(this),
-      setCustomRpc:          this.setCustomRpc.bind(this),
       setProviderType:       this.setProviderType.bind(this),
       useEtherscanProvider:  this.useEtherscanProvider.bind(this),
       setCurrentCurrency:    this.setCurrentCurrency.bind(this),
@@ -266,6 +264,8 @@ module.exports = class MetamaskController extends EventEmitter {
 
       // PreferencesController
       setSelectedAddress:        nodeify(preferencesController.setSelectedAddress).bind(preferencesController),
+      setDefaultRpc:             nodeify(this.setDefaultRpc).bind(this),
+      setCustomRpc:              nodeify(this.setCustomRpc).bind(this),
 
       // KeyringController
       setLocked:                 nodeify(keyringController.setLocked).bind(keyringController),
@@ -666,6 +666,7 @@ module.exports = class MetamaskController extends EventEmitter {
     this.configManager.setRpcTarget('http://localhost:8545')
     extension.runtime.reload()
     this.lookupNetwork()
+    return Promise.resolve('http://localhost:8545')
   }
 
   setCustomRpc (rpcTarget, rpcList) {
@@ -674,6 +675,7 @@ module.exports = class MetamaskController extends EventEmitter {
       .then(() => {
         extension.runtime.reload()
         this.lookupNetwork()
+        return Promise.resolve(rpcTarget)
       })
   }
 

ui/app/actions.js

@@ -674,21 +674,37 @@ function markAccountsFound() {
 // default rpc target refers to localhost:8545 in this instance.
 function setDefaultRpcTarget (rpcList) {
   log.debug(`background.setDefaultRpcTarget`)
-  background.setDefaultRpc()
-  return {
-    type: actions.SET_RPC_TARGET,
-    value: 'http://localhost:8545',
+  return (dispatch) => {
+    background.setDefaultRpc((err, result) => {
+      if (err) {
+        console.error(err)
+        return dispatch(self.displayWarning('Had a problem changing networks.'))
+      }
+      dispatch(self.setRpc(result))
+    })
   }
+
 }
 
 function setRpcTarget (newRpc) {
-  return (dispatch) => {
     log.debug(`background.setRpcTarget`)
-    background.setCustomRpc(newRpc)
-    return {
-      type: actions.SET_RPC_TARGET,
-      value: newRpc,
+    return (dispatch) => {
+      background.setCustomRpc(newRpc, (err, result) => {
+        if (err) {
+          console.err(err)
+          return dispatch(self.displayWarning('Had a problem changing networks!'))
+        }
+        dispatch(self.setRpc(result))
+      })
     }
+
+
+}
+
+function setRpc (newRpc) {
+  return {
+    type: actions.SET_RPC_TARGET,
+    value: 'http://localhost:8545',
   }
 }