新增订单待支付与支付确认后端流程

backend/internal/modules/wallet/repository.go

@@ -57,6 +57,24 @@ func (r *Repository) Ledger(userID uint64) ([]LedgerDTO, error) {
 	return items, nil
 }
 
+func (r *Repository) Recharge(userID uint64, amount float64) (*AccountDTO, error) {
+	err := r.db.Transaction(func(tx *gorm.DB) error {
+		return AppendEntries(tx, Entry{
+			UserID:      userID,
+			Direction:   "in",
+			Amount:      amount,
+			BalanceType: "available",
+			BizType:     "dev_recharge",
+			BizNo:       "DEV",
+			Remark:      "开发环境充值",
+		})
+	})
+	if err != nil {
+		return nil, err
+	}
+	return r.Account(userID)
+}
+
 func (r *Repository) AdminLedger(query AdminLedgerQuery) ([]AdminLedgerDTO, error) {
 	limit := query.Limit
 	if limit <= 0 || limit > 500 {
@@ -146,6 +164,9 @@ func applyEntry(account *model.WalletAccount, entry Entry) (float64, error) {
 		if entry.Direction == "in" {
 			account.AvailableBalance += entry.Amount
 		} else {
+			if account.AvailableBalance < entry.Amount {
+				return 0, ErrInsufficientBalance
+			}
 			account.AvailableBalance -= entry.Amount
 		}
 		return account.AvailableBalance, nil
@@ -153,6 +174,9 @@ func applyEntry(account *model.WalletAccount, entry Entry) (float64, error) {
 		if entry.Direction == "in" {
 			account.FrozenBalance += entry.Amount
 		} else {
+			if account.FrozenBalance < entry.Amount {
+				return 0, ErrInsufficientBalance
+			}
 			account.FrozenBalance -= entry.Amount
 		}
 		return account.FrozenBalance, nil