diff --git a/src/middlewares/middleware.ts b/src/middlewares/middleware.ts
index f954533..1b36249 100644
--- a/src/middlewares/middleware.ts
+++ b/src/middlewares/middleware.ts
@@ -22,14 +22,18 @@ export default class Middleware {
   blockchainTriggerFilter = async (req: Request, res: Response, next: NextFunction) => {
     //check if request is from blockchain trigger
     const { triggerPath, triggerValue, txHash } = extractTriggerDataFromRequest(req);
+    if(!triggerPath || !triggerValue || !txHash) {
+      res.send("Not from blockchain");
+      return;
+    }
     const result = await this.ain.getValue(triggerPath);
     // if request is first reque st, set cache 
     if (this.cache.get(txHash) && this.cache.get(txHash) !== "error") {
-      res.send("duplicated");
+      res.send("Duplicated");
       return;
     }
     this.cache.set(txHash, "in_progress", 500);
-    _.isEqual(result, triggerValue) ? next(): res.send("not from blockChain");
+    _.isEqual(result, triggerValue) ? next(): res.send("Not from blockchain");
   }
   /**
    *  DEPRECATED
diff --git a/src/utils/extractor.ts b/src/utils/extractor.ts
index 47be1f4..87c7686 100644
--- a/src/utils/extractor.ts
+++ b/src/utils/extractor.ts
@@ -26,7 +26,7 @@ export const extractTriggerDataFromRequest = (req:Request) => {
   const triggerData = {
     triggerPath: path,
     triggerValue: req.body.value,
-    txHash: req.body.txhash,
+    txHash: req.body.transaction.hash,
   }
   return triggerData
 }