PayPlug is a credit card payment solution that works without a distance selling contract (VAD).
The customer does not need an account to pay and the customizable checkout page has been optimized for conversion.
The solution does not include any subscription or commitment. You only pay if there are sales. The rates are decreasing according to your monthly payment volume (from 1.2 % + €0.25 to 0.5% + €0.25 per transaction or less).

https://github.com/marikv/Payplug.com-Opencart-3