fix

order-application-service/src/main/java/cn/freemud/fuyou/service/PaymentService.java

@@ -75,7 +75,7 @@ public class PaymentService {
             return baseResponse;
         }
         DiscountRequest discountRequest = mapperFacade.map(request, DiscountRequest.class);
-        return null;
+        return eventProcessorRegister.getEventProcessor(payChannelEnum.getCode()).process(discountRequest);
     }