Czech Bank Account Validator

A small and handy library to validate CZ bank account numbers. Running in a browser, in Node.js and also as ES6 module.

Getting Started

With npm:

$ npm i --save cz-bank-account-validator

With yarn:

$ yarn add cz-bank-account-validator

Installation

In a browser:

<script type="text/javascript" src="cz-bank-account-validator.min.js"></script>
<script type="text/javascript">
    const bankValidator = window['cz-bank-account-validator'];
    const isValid = bankValidator.validate('2502056361/2010');
    alert(isValid);
</script>

In Node.js (with require):

const bankValidator = require('cz-bank-account-validator/lib/cz-bank-account-validator');

bankValidator.validate('2502056361/2010');
// => true

ES6 Modules:

import bankValidator from 'cz-bank-account-validator/lib/cz-bank-account-validator';

bankValidator.validate('2502056361/2010');
// => true

Usage

const bankValidator = require('cz-bank-account-validator/lib/cz-bank-account-validator');

Valid bank account numbers

bankValidator.validate('2502056361/2010') // true
bankValidator.validate('19-2502056361/0800') // true

Invalid bank account numbers

Unknown bank code (see all supported CZ bank codes):

bankValidator.validate('19-2502056361/9999') // false

Account prefix allowed length exceeded:

bankValidator.validate('1999999-2502056361/0800') // false

Account number mod 11 rule not fulfilled:

bankValidator.validate('19-9144118100/0800') // false

Get all CZ bank codes

bankValidator.getAllBankCodes() // '{"2010":{"bankName":"Fio banka, a.s."},"2020":{"bankName":"MUFG Bank (Europe) N.V. Prague Branch"},"2030":{"bankName":"AKCENTA, spořitelní a úvěrní družstvo"}, ... "0710":{"bankName":"Česká národní banka"},"0800":{"bankName":"Česká spořitelna, a.s."}}'

Get bank account fragments

bankValidator.getAccountPrefix('2502056361/2010') // null - prefix is empty
bankValidator.getAccountPrefix('19-2502056361/0800') // 19
bankValidator.getAccountPrefix('19-2502056361/9999') // null - bank code is invalid => account number is invalid
bankValidator.getAccountPrefix('19-9144118100/0800') // null - account number mod 11 rule not fulfilled => account number is invalid

bankValidator.getAccountNumber('2502056361/2010') // 2502056361
bankValidator.getAccountNumber('19-2502056361/0800') // 2502056361
bankValidator.getAccountNumber('19-2502056361/9999') // null - bank code is invalid => account number is invalid
bankValidator.getAccountNumber('19-9144118100/0800') // null - account number mod 11 rule not fulfilled => account number is invalid

bankValidator.getBankCode('2502056361/2010') // 2010
bankValidator.getBankCode('19-2502056361/0800') // 0800
bankValidator.getBankCode('19-2502056361/9999') // null - bank code is invalid => account number is invalid
bankValidator.getBankCode('19-9144118100/0800') // null - account number mod 11 rule not fulfilled => account number is invalid

License

This project is licensed under the MIT License - see the LICENSE.md for more details.