Hi Sebastian,

I'm the author of a similar project, though it's much more limited in scope.

It's a native PHP extension that provides a builtin function to validate the Schnorr signatures of Nostr events but uses libsecp256k1 to do it, which is orders of magnitude faster than simplito/elliptic-php and public-square/phpecc.

In addition to having an interest in Bitcoin and Nostr I have a fair bit of experience publishing FOSS PHP libraries. Feel free to ping me if you need any help.