fix : total discount

src/modules/Coupon/coupon.service.ts

@@ -209,6 +209,7 @@ class CouponService {
       cartShipmentItem.totalCouponDiscount = discount;
       cartShipmentItem.totalPaymentPrice = cartShipmentItem.totalPaymentPrice - discount;
       userCart.coupon_discount = discount;
+      userCart.total_discount += discount;
       coupon.usageCount += 1;
 
       await validCartShipmentItem.save({ session });