idStore - cancel tx

app/scripts/background.js

@@ -79,6 +79,7 @@ function handleInternalCommunication(remotePort){
     submitPassword:     idStore.submitPassword.bind(idStore),
     setSelectedAddress: idStore.setSelectedAddress.bind(idStore),
     signTransaction:    idStore.signTransaction.bind(idStore),
+    cancelTransaction:  idStore.cancelTransaction.bind(idStore),
     setLocked:          idStore.setLocked.bind(idStore),
   })
   duplex.pipe(connection).pipe(duplex)

app/scripts/lib/idStore.js

@@ -131,6 +131,14 @@ IdentityStore.prototype.signTransaction = function(password, txId, cb){
   })
 }
 
+IdentityStore.prototype.cancelTransaction = function(txId){
+  const self = this
+
+  var txData = self._currentState.unconfTxs[txId]
+  delete self._currentState.unconfTxs[txId]
+  self._didUpdate()  
+}
+
 //
 // private
 //