Added a rule action that will delete the transactions it matches.

app/Api/V1/Controllers/TransactionController.php

@@ -269,6 +269,7 @@ class TransactionController extends Controller
      *
      * @param TransactionStoreRequest $request
      *
+     * @throws FireflyException
      * @return JsonResponse
      */
     public function store(TransactionStoreRequest $request): JsonResponse
@@ -326,7 +327,7 @@ class TransactionController extends Controller
 
         $selectedGroup = $collector->getGroups()->first();
         if (null === $selectedGroup) {
-            throw new NotFoundHttpException(); // @codeCoverageIgnore
+            throw new FireflyException('Cannot find transaction. Possibly, a rule deleted this transaction after its creation.');
         }
         /** @var TransactionGroupTransformer $transformer */
         $transformer = app(TransactionGroupTransformer::class);