Check BBAN number

[kayman-mk]

Add support to check the BBAN. Even if the IBAN is valid the BBAN might not (invalid bank code, invalid account number check digit, ...)

I have the data for Germany and could implement the necessary checks.

[marcwrobel]

Hi @kayman-mk, as long as the check does not rely on external data, like for instance the RIB key check in France, that is indeed a very good idea.

Could you share the data and information you have for Germany ?

[kayman-mk]

Well, the check for german BBAN relies on data published by the German Federal Bank. They publish an excel sheet per quarter. This sheet lists all banks plus an identifier for the check digit algorithm. It is publicly available.

It's like the SWIFT update in the BbanStructure.java but a bigger amount of data. Changes takes place occasionally.

[marcwrobel]

Thanks @kayman-mk. I will look into it when I have some time.