package domain import "errors" var ( ErrEntityNotFound = errors.New("entity not found") ErrForbidden = errors.New("forbidden") ErrUnauthorized = errors.New("unauthorized") ErrValidation = errors.New("validation failed") ErrUserNotFound = errors.New("user not found") ErrDuplicateEntity = errors.New("duplicate entity") ErrOptimisticLock = errors.New("optimistic lock failure") ErrInvalidOperation = errors.New("invalid operation") ErrConflict = errors.New("conflict") )