Self hosted crypto payment gateway

It's nonsensical to use a centralized gateway for accepting crypto payments and pay a fee for the service.
The ideal gateway should offer multiple currencies and blockchains. It seems there are not many options yet.

CEO said:

There is also : oxapay.com.
" I didn't use it personally."

This is not a real self hosted gateway.
Whenever you see a fee and a "sign in" option there is something wrong.