重构支付接口，以动态支持多种产品类型，整合长短效套餐的购买支付逻辑；引入 decimal 类型的金额计算；

web/services/user.go

@@ -1,7 +1,6 @@
 package services
 
 import (
-	"context"
 	q "platform/web/queries"
 )
 
@@ -9,12 +8,12 @@ var User = &userService{}
 
 type userService struct{}
 
-func (s *userService) RechargeConfirm(ctx context.Context, tradeNo string, verified *TransactionVerifyResult) error {
+func (s *userService) RechargeConfirm(tradeNo string, verified *TransactionVerifyResult) error {
 
 	err := q.Q.Transaction(func(tx *q.Query) error {
 
 		// 更新交易状态
-		result, err := Transaction.CompleteTransaction(ctx, tx, &TransactionCompleteData{
+		result, err := Transaction.CompleteTransaction(tx, &TransactionCompleteData{
 			TradeNo:                 tradeNo,
 			TransactionVerifyResult: *verified,
 		})
@@ -31,7 +30,7 @@ func (s *userService) RechargeConfirm(ctx context.Context, tradeNo string, verif
 
 		_, err = tx.User.
 			Where(tx.User.ID.Eq(user.ID)).
-			UpdateSimple(tx.User.Balance.Add(result.Trade.Amount))
+			UpdateSimple(tx.User.Balance.Value(user.Balance.Add(result.Trade.Amount)))
 		if err != nil {
 			return err
 		}