优化结构

internal/biz/payment/payment.go

@@ -349,15 +349,6 @@ func (r *PaymentFulfillmentRegistry) Handler(kind string) PaymentFulfillmentHand
 	return r.handlers[kind]
 }
 
-func (r *PaymentFulfillmentRegistry) Len() int {
-	if r == nil {
-		return 0
-	}
-	r.mu.RLock()
-	defer r.mu.RUnlock()
-	return len(r.handlers)
-}
-
 type PaymentUsecase struct {
 	repo         PaymentRepo
 	orders       PaymentOrderRepo
@@ -387,12 +378,6 @@ func NewPaymentUsecase(repo PaymentRepo, orders PaymentOrderRepo, hooks PaymentH
 	}
 }
 
-func NewConfiguredPaymentUsecase(repo PaymentRepo, orders PaymentOrderRepo, hooks PaymentHooks, sources *PaymentOrderSourceRegistry, fulfillments *PaymentFulfillmentRegistry, appLogger *slog.Logger) (*PaymentUsecase, error) {
-	// Business modules are optional in the template. Missing modules are
-	// reported when the corresponding payment operation is invoked.
-	return NewPaymentUsecase(repo, orders, hooks, sources, fulfillments, appLogger), nil
-}
-
 func (uc *PaymentUsecase) RegisterBusinessModule(module PaymentBusinessModule) error {
 	if module == nil {
 		return errors.New("支付业务模块为空")
@@ -464,14 +449,11 @@ func (uc *PaymentUsecase) Create(ctx context.Context, req *PaymentRequest) (*Pay
 	if req.OriginalAmount < req.Amount {
 		return nil, errors.New("原始金额不能小于支付订单金额")
 	}
-	canonicalProvider, canonicalTradeNo := req.Provider, req.TradeNo
-	canonicalBusinessType, canonicalBusinessID := req.BusinessType, req.BusinessID
-	canonicalSubject, canonicalCurrency, canonicalAmount := req.Subject, req.Currency, req.Amount
-	canonicalOriginalAmount, canonicalPaymentMode := req.OriginalAmount, req.PaymentMode
 	canonicalExtra, err := json.Marshal(req.Extra)
 	if err != nil {
 		return nil, fmt.Errorf("支付扩展参数无效: %w", err)
 	}
+	canonicalFingerprint := paymentOrderFingerprint(req, canonicalExtra)
 	if err := uc.hooks.BeforeCreate(ctx, req); err != nil {
 		return nil, err
 	}
@@ -479,7 +461,7 @@ func (uc *PaymentUsecase) Create(ctx context.Context, req *PaymentRequest) (*Pay
 	if err != nil {
 		return nil, fmt.Errorf("支付扩展参数无效: %w", err)
 	}
-	if req.Provider != canonicalProvider || req.TradeNo != canonicalTradeNo || req.BusinessType != canonicalBusinessType || req.BusinessID != canonicalBusinessID || req.Subject != canonicalSubject || req.Currency != canonicalCurrency || req.Amount != canonicalAmount || req.OriginalAmount != canonicalOriginalAmount || req.PaymentMode != canonicalPaymentMode || string(currentExtra) != string(canonicalExtra) {
+	if paymentOrderFingerprint(req, currentExtra) != canonicalFingerprint {
 		return nil, ErrPaymentOrderConflict
 	}
 	return uc.createWithOrder(ctx, req)
@@ -926,10 +908,7 @@ func (uc *PaymentUsecase) refundWithOrder(ctx context.Context, provider, tradeNo
 		return nil, err
 	}
 	if !accepted {
-		if providerErr != nil {
-			return nil, providerErr
-		}
-		return nil, errors.New(message)
+		return nil, providerErr
 	}
 	result.Status = "refund_pending"
 	return attachOrderResult(result, order), nil

internal/biz/payment/payment_order.go

@@ -182,15 +182,6 @@ func (r *PaymentOrderSourceRegistry) Source(kind string) PaymentOrderSource {
 	return r.sources[kind]
 }
 
-func (r *PaymentOrderSourceRegistry) Len() int {
-	if r == nil {
-		return 0
-	}
-	r.mu.RLock()
-	defer r.mu.RUnlock()
-	return len(r.sources)
-}
-
 func (r *PaymentOrderSourceRegistry) Unregister(kind string) {
 	if r == nil {
 		return

internal/biz/payment/provider.go

@@ -9,5 +9,5 @@ var ProviderSet = wire.NewSet(
 	NewPaymentHooks,
 	NewPaymentOrderSourceRegistry,
 	NewPaymentFulfillmentRegistry,
-	NewConfiguredPaymentUsecase,
+	NewPaymentUsecase,
 )