nostr-filter "relay"
nostr-filter is a very interesting "relay", it is not really a relay it's more a filter relay that you run before your relay. it can be used to filter events, user, ip addresses, content... the best part of it, it can be run before any relay and it sends then only the filtered events to your own relay.
GitHub
GitHub - imksoo/nostr-filter: `nostr-filter` is a Nostr relay server that filters messages based on regular expressions.
`nostr-filter` is a Nostr relay server that filters messages based on regular expressions. - imksoo/nostr-filter