KingDta::Account does not accept bank numbers longer than 8 digits

[iblue]

We are doing bank transfers to the USA, where the DTAZV format is needed. Transfers are done via routing number and BIC codes. A U.S. bank routing number is 9 digits, while KingDta::Account accepts 8 digits only.

I would fix this myself, but are not sure, which would be the best option.

• Option A: Subclass KingDta::Account to a KingDta::DtazvAccount where longer bank_numbers and bank_account_numbers are allowed.
• Option B: Move the length check to KingDta::Dtaus, so that the allowed length is checked depending on the format (DTAZV allows longer numbers than DTAUS).

Any suggestions?