feat(pay-v2): P8 Task4 续费入账 invoice.paid→renewal order + subscription.renewed

internal/store/order.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 
 	"github.com/wangjia/pay/internal/model"
 )
@@ -65,6 +66,35 @@ func (s *OrderStore) MarkAttemptPaid(outTradeNo, channel, providerRef string, at
 	return flipped, nil
 }
 
+// CreateRenewalPaid 幂等建一张已付 renewal order + attempt(续费不经收银台,建即 paid)。
+// 重复(invoice 重投)→ created=false。renewal order/attempt 均带唯一约束,ON CONFLICT DO NOTHING。
+func (s *OrderStore) CreateRenewalPaid(order *model.OrderV2, att *model.Attempt) (bool, error) {
+	var created bool
+	err := s.db.Transaction(func(tx *gorm.DB) error {
+		ores := tx.Clauses(clause.OnConflict{
+			Columns: []clause.Column{{Name: "out_trade_no"}}, DoNothing: true,
+		}).Create(order)
+		if ores.Error != nil {
+			return ores.Error
+		}
+		if ores.RowsAffected == 0 {
+			return nil // 已建过 → 幂等 no-op
+		}
+		ares := tx.Clauses(clause.OnConflict{
+			Columns: []clause.Column{{Name: "channel"}, {Name: "provider_ref"}}, DoNothing: true,
+		}).Create(att)
+		if ares.Error != nil {
+			return ares.Error
+		}
+		created = ares.RowsAffected > 0
+		return nil
+	})
+	if err != nil {
+		return false, fmt.Errorf("store.CreateRenewalPaid: %w", err)
+	}
+	return created, nil
+}
+
 func (s *OrderStore) CancelOrder(outTradeNo string) (bool, error) {
 	res := s.db.Model(&model.OrderV2{}).
 		Where("out_trade_no = ? AND status = ?", outTradeNo, model.OrderPendingV2).