The plugin should implement a payment gateway module.
The merchant with the Presta Shop plugin should be able to implement this plugin to allow his customers to pay with our payment gateway.
Merchant user flow:
1. Install or upload plugin.
2. Configure it: specify his internal id(can be found in our system) and secret key(can be found in our system).
Clients user flow:
1. At the checkout page, he should be able to choose our payment gateway as a preferred payment option.
2. After he pushed the "Pay" button he should be redirected to our platform.
The redirect should be done as a GET HTTP request to our page with a set of parameters that will be specified once the development will start.
We also need a test environment so we can test new plugin