dd

app/Http/Controllers/Api/PayPlusController.php

@@ -91,7 +91,7 @@ class PayPlusController implements PayMentInterFace
         $signature = $request->header('Authorization', '');
         $service = (new PayPlus())->getPayoutService();
         if (!$service->verifyPayoutSignature($post, $signature)) {
-            Util::WriteLog('PayPlus', 'cash notify verify failed');
+            Util::WriteLog('PayPlus', 'cash notify verify failed: ' . json_encode($post) . 'headers: ' . json_encode($request->headers->all()));
 
             return 'success';
         }