feat(commerce): add TransferService interface and WithTransferService option

veza-backend-api/internal/core/marketplace/service.go

@@ -136,6 +136,11 @@ type SellerSale struct {
 	Date      string  `json:"date"`
 }
 
+// TransferService abstracts the payout transfer provider (v0.603)
+type TransferService interface {
+	CreateTransfer(ctx context.Context, sellerUserID uuid.UUID, amount int64, currency, orderID string) error
+}
+
 // Service implémente MarketplaceService
 type Service struct {
 	db                 *gorm.DB
@@ -144,6 +149,8 @@ type Service struct {
 	paymentProvider    PaymentProvider
 	hyperswitchEnabled bool
 	checkoutSuccessURL string
+	transferService    TransferService
+	platformFeeRate    float64
 }
 
 // ServiceOption configures the marketplace Service.
@@ -162,6 +169,14 @@ func WithHyperswitchConfig(enabled bool, checkoutSuccessURL string) ServiceOptio
 	}
 }
 
+// WithTransferService injects the payout transfer service and platform fee rate (v0.603)
+func WithTransferService(ts TransferService, feeRate float64) ServiceOption {
+	return func(s *Service) {
+		s.transferService = ts
+		s.platformFeeRate = feeRate
+	}
+}
+
 // NewService creates a new Marketplace service instance
 func NewService(db *gorm.DB, logger *zap.Logger, storage StorageService, opts ...ServiceOption) *Service {
 	s := &Service{