yes, this has had a lot of testing done and is used by quite a few nostr1.com relays currently.  if youre using it on your own relay, you would make a slight modification to remove the multi-domain support and point it to whatever method you want to use for access control list lookup. 

 looks cool, how do i set it up? 

 well, i dont have docs for it, but i do have docs for installing relaytools which includes this and strfry github.com/relaytools/docs