Smoke Signal has a similar system on ATProto (no affiliation) I believe this is the project that has the Rust code (on the GitHub of ATProto) @smokesignal.eve

Smoke Signal has a similar system on ATProto (no affiliation) I believe this is the project that has the Rust code (on the GitHub of ATProto) @smokesignal.events/acudo at main · tangled https://share.google/HG59BdzeJpib7fw5x https://share.google/HG59BdzeJpib7fw5x