README.md

BankNuban

Nuban algorithm implementation in #dart, #python and #javascript

IMPLEMENTATION MODALITY

CHECK DIGIT ALGORITHM. The approved NUBAN format ABC-DEFGHIJKL-M where ABC is the 3- digit bank code assigned by the CBN DEFGHIJKL is the NUBAN Account serial number M is the NUBAN Check Digit, required for account number validation

Check Digit Algorithm

Step 1.

Calculate A3+B7+C3+D3+E7+F3+G3+H7+I3+J3+K7+L3

Step 2.

Calculate Modulo 10 of your result i.e. the remainder after dividing by 10

Step 3.

Subtract your result from 10 to get the Check Digit

Step 4.

If your result is 10, then use 0 as your check digit

The Table below shows the 3 digit codes of some banks.

S/N	BANK	CODE
1	Access bank	044
2	fidelity Bank	070
3	StanbicIBTC	221
4	Afribank	014
5	Finbank	085
6	Guaranty Trust Bank	058
7	Diamond Bank	063
8	United Bank for Africa	033
9	Ecobank	050
10	Union Bank	032

Example 1:

The NUBAN code of a typical customer bank account in First Bank of Nigeria Plc would be derived as follows: The 3-digit code assigned to First Bank in the Bankers Clearing System is 011 Assume a NUBAN serial number of 000001457 The check digit would be computed as follows:

Step 1.

03+17+13+03+07+03+03+07+13+43+57+73= 81

Step 2.

Module 10 of 81 is 1 i.e. 1 is the remainder when you divide 81 by 10

Step 3.

Subtract 1 from 10 to get Check Digit 9

Therefore the NUBAN code for this example account is 0000014579