Core components for the WordPress payment processing library. This library is used in the WordPress plugin Pronamic Pay: https://www.pronamicpay.com/, but also allows other plugin developers to set up a payment plugin.
Each integration should already have a version number stored in the database after a clean install. That is the only way to determine whether or not an upgrade message should be shown.
Ideally, all extensions should pass all of the following arguments:
Each integration should already have a version number stored in the database after a clean install. That is the only way to determine whether or not an upgrade message should be shown.