clabe-validator

CLABE Validator

<img src=https://centerkey.com/graphics/center-key-logo.svg align=right width=200 alt=logo>

JavaScript library to analyze or create a CLABE number for a Mexican bank account

CLABE (Clave Bancaria Estandarizada — Spanish for "standardized banking code") is a banking standard from the Mexican Bank Association (Asociación de Bancos de México — ABM) for uniform numbering of bank accounts.  CLABE numbers are 18 digits long.  See: https://en.wikipedia.org/wiki/CLABE

A) Online form

Try it out:
https://centerkey.com/clabe

B) Setup

Browser

Include in a web page:

<script src=clabe.min.js></script>

or from the jsdelivr.com CDN:

<script src=https://cdn.jsdelivr.net/npm/clabe-validator@1.3/dist/clabe.min.js></script>

node

Install package:

$ npm install clabe-validator

Import package:

const clabe = require('clabe-validator');

C) Validator usage

Pass the CLABE number as an 18-character string into clabe.validate(clabeNum).

1. Example JavaScript code

const clabeNum = '002010077777777771';
const clabeCheck = clabe.validate(clabeNum);
console.log(clabeCheck.ok ? '¡Que bueno!' : '¡Muy mal!');
console.log('Your bank: ' + clabeCheck.bank);

2. Example JSON result for a valid CLABE number

{
   ok:       true,
   error:    null,
   formatOk: true,
   tag:      'BANAMEX',
   bank:     'Banco Nacional de México, S.A.',
   city:     'Aguascalientes',
   account:  '07777777777'
}

3. Example JSON result for an invalid CLABE number

{
   ok:       false,
   formatOk: true,
   error:    'invalid-city',
   message:  'Invalid city code: 000'
}

The formatOk field indicates if the CLABE's length and checksum are both valid (even if the bank code or city code are invalid).

4. Possible errors

Error code	Error message	Format Ok
invalid-length	Must be exactly 18 digits long	false
invalid-characters	Must be only numeric digits (no letters)	false
invalid-checksum	Invalid checksum, last digit should be: [DIGIT]	false
invalid-bank	Invalid bank code: [CODE]	true
invalid-city	Invalid city code: [CODE]	true

D) Calculator usage

Pass the bank code, city code, and account number into clabe.calculate(bankCode, cityCode, accountNumber) and get the 18-character CLABE number back.

const clabeNum = clabe.calculate(2, 10, 7777777777);
console.log(clabeNum === '002010077777777771');  //true

E) Notes

1. Feel free to submit questions at: github.com/center-key/clabe-validator/issues
2. To be a contributor, fork the project and run the commands npm install and npm test on your local clone.  Make your edits and rerun the tests.  Pull requests welcome (no need to update the version in package.json or any files in the dist folder as they are all updated as part of the release process).

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CLABE Validator code is open source under the MIT License, and the documentation is published under the CC BY-SA 4.0 license.