- Published on
OpenSats is funding five open-source projects advancing the nostr ecosystem.
NIP-29
relay-based groups, Nostr groups, moderated groups
A Nostr spec for relay-based groups. The hosting relay owns the membership list, the moderation log, and the stream of group messages.
NIP-29 defines relay-based groups on Nostr. A group lives entirely on one relay rather than in the client-side web of follows that powers most of Nostr. The relay owns the membership list, the moderation log, and the stream of group messages.
Each group has a unique identifier made of the relay URL and a group ID. A user joins by asking the relay, and the relay's admins accept or reject. Once inside, messages are plain Nostr events tagged with the group ID. If the user switches to a different relay, the group does not follow them.
This design trades portability for simpler moderation. Admins can delete posts, kick members, and set rules without coordinating across the whole network. Clients that implement NIP-29 include 0xchat, Amethyst, and the web client at groups.nip29.com.