What are the ways to organize the reception and payment of money on the site?

Question

Payment systems

Hello! I can’t google this question, so I ask you:
There is a website with “clients” and “executors”, you need to accept payments from customers (individual / legal from the Russian Federation and the EU) and pay them to the performers (individual / legal from the Russian Federation and the EU). In principle, the system is identical to a regular freelance exchange, but it’s impossible to google how such a payment system is implemented. Maybe someone came across articles on this topic, or faced the implementation of such a system?

Answer 1

https://www.free-kassa.ru/
https://www.robokassa.ru/
https://kassa.yandex.ru/