优惠券参与订单价格

@@ -500,7 +500,7 @@ class Order extends Api
             'order_no' => $order_no,
             'total_price' => $sum_price,  // 订单总价
             'discount_price' => $couponprice,  // 优惠价格
-            'pay_price' => bcadd($sum_price,$couponprice,2),  // 支付总价
+            'pay_price' => bcsub($sum_price,$couponprice,2),  // 支付总价
             'express_price' => $distance_price,  // 骑手费用
             'user_id' => $user_id,
             'user_coupon_id' => $coupon_id > 0 ? $coupon_id : 0