Discover how the Luhn Algorithm verifies credit card accuracy, supports secure transactions, and helps prevent errors in inputting Social Security numbers.

This module simplifies getting started with processing Vinti4, Visa, and Mastercard payments using SISP on Node.js. Note: You can request SISP credentials, view their documentation, and more here.

Enketo Transformer is maintained by the ODK team (primarily Trevor Schmidt). Broader context is available in the Enketo Express repository. ODK XForms are based off of W3C XForms which were originally ...