Does anyone know of a writePolicy plugin for strfry that can be used specifically for spam filtering? I'm new to Nostr and set up my own relay like a typical *nix nerd, but I can't find anything less restrictive than just whitelisting specific public keys. I'm looking for something to monitor spam and blacklist specific keys, or to integrate Bayesian antispam logic (like dbacl), or even a community-updated public antispam list (similar to uBlock Origin).

I found https://github.com/0xtrr/chief but it doesn't seem like much of a solution and looks abandoned... I'd love to offer some open storage to the community/network, but I don't want to end up as a spam relay...

Thanks!