INTERFACE {{p}}if_overdraft PUBLIC.
  TYPES ty_amount TYPE p LENGTH 15 DECIMALS 2.
  TYPES ty_segment TYPE c LENGTH 1.
  CONSTANTS:
    c_segment_private  TYPE ty_segment VALUE 'P',
    c_segment_business TYPE ty_segment VALUE 'B',
    c_min_interest     TYPE ty_amount VALUE '5.00'.
  METHODS calculate
    IMPORTING iv_amount          TYPE ty_amount
              iv_days            TYPE i
              iv_segment         TYPE ty_segment
    RETURNING VALUE(rv_interest) TYPE ty_amount.
ENDINTERFACE.