INTERFACE {{p}}if_iban_check PUBLIC.
  TYPES ty_reason TYPE c LENGTH 10.
  CONSTANTS:
    BEGIN OF c_reason,
      ok       TYPE ty_reason VALUE 'OK',
      empty    TYPE ty_reason VALUE 'EMPTY',
      chars    TYPE ty_reason VALUE 'CHARS',
      country  TYPE ty_reason VALUE 'COUNTRY',
      length   TYPE ty_reason VALUE 'LENGTH',
      checksum TYPE ty_reason VALUE 'CHECKSUM',
    END OF c_reason.
  METHODS check
    IMPORTING iv_iban          TYPE string
    RETURNING VALUE(rv_reason) TYPE ty_reason.
ENDINTERFACE.