Specifications about #nip

The versioned encryption format the rest of Nostr builds on: secp256k1 ECDH, HKDF, padding, ChaCha20 and HMAC-SHA256.

How an application declares the event kinds it can handle, and how users recommend one for a kind their client cannot open.

Static websites whose files are Blossom blobs, listed by a manifest event: one root site per key, and named sites beside it.

Kind 24, a plain text message addressed to one or more keys, meant for a notification screen rather than a thread.

Kind 30402, a classified listing: something for sale or on offer, with enough structure to be worth querying.

An HTTP file storage API discovered through a well-known document, replaced by Blossom.

Kind 1063, file metadata: the url, the hash, the mime type and the size of a shared file.

Data vending machines: paid jobs requested and delivered as events, reserving the kind range 5000 to 7000.

Assertions a trusted provider publishes about a key, an event or an external identifier, so a client does not have to compute a web of trust itself.

Kind 9802, a highlight: the passage someone found worth keeping, pointing back at the event or the URL it was taken from.

Negentropy over Nostr: range-based set reconciliation, so two sides transfer only the events one of them lacks.

Kind 9041, a fundraising goal that zaps are tallied against.

The i tags for identifiers that exist outside Nostr: URLs, ISBNs, podcast GUIDs, DOIs, hashtags and blockchain transactions.

Kind 34550, Reddit-style communities where moderators approve the posts addressed to them.

Video events, long and short, carrying the metadata a video client needs around media hosted elsewhere.

The dash tag, marking an event that only its author may publish, which relays enforce through NIP-42.

Kind 20, picture-first posts where the images carry the event rather than illustrate it.

Kind 10002, the list saying where a key writes and where it reads mentions, which is what the outbox model is built on.

Kind 64, a chess game written in PGN.

Kind 62, a request that a relay delete everything a key ever published there.