package services import "context" // RoyaltyService is a stub for the missing royalty service type RoyaltyService struct{} func NewRoyaltyService() *RoyaltyService { return &RoyaltyService{} } func (s *RoyaltyService) CalculateRoyalties(ctx context.Context) error { return nil } func (s *RoyaltyService) GetUserRoyalties(ctx context.Context, userID string) (interface{}, error) { return nil, nil }