Connect to the site payment via wayforpay

On the site of the url abbreviation service https://byli.pro/ you need to connect the wayforpay payment to purchase services (subscription model)

It has several payment gateways from the author (Stripe, PayPal, Coinbase) It is necessary to implement the gateway through the aggregator Wayforpay (wayforpay.com) on the basis of the installed gateways (they are implemented in the form of separate files, one for settings in the admin room, the second actually performs the necessary functions).

I will provide the script and keys for the aggregator to the performer. There is no documentation for the script, the api description on wayforpay is on the site.