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69 lines
3.0 KiB
Markdown
69 lines
3.0 KiB
Markdown
NIP-65
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======
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Relay List Metadata
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-------------------
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`draft` `optional`
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Defines a replaceable event using `kind:10002` to advertise preferred relays for discovering a user's content and receiving fresh content from others.
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The event MUST include a list of `r` tags with relay URIs and a `read` or `write` marker. Relays marked as `read` / `write` are called READ / WRITE relays, respectively. If the marker is omitted, the relay is used for both purposes.
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The `.content` is not used.
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```jsonc
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{
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"kind": 10002,
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"tags": [
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["r", "wss://alicerelay.example.com"],
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["r", "wss://brando-relay.com"],
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["r", "wss://expensive-relay.example2.com", "write"],
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["r", "wss://nostr-relay.example.com", "read"]
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],
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"content": "",
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// other fields...
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}
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```
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This NIP doesn't fully replace relay lists that are designed to configure a client's usage of relays (such as `kind:3` style relay lists). Clients MAY use other relay lists in situations where a `kind:10002` relay list cannot be found.
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## When to Use Read and Write Relays
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When seeking events **from** a user, Clients SHOULD use the WRITE relays of the user's `kind:10002`.
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When seeking events **about** a user, where the user was tagged, Clients SHOULD use the READ relays of the user's `kind:10002`.
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When broadcasting an event, Clients SHOULD:
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- Broadcast the event to the WRITE relays of the author
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- Broadcast the event to all READ relays of each tagged user
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## Motivation
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The old model of using a fixed relay list per user centralizes in large relay operators:
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- Most users submit their posts to the same highly popular relays, aiming to achieve greater visibility among a broader audience
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- Many users are pulling events from a large number of relays in order to get more data at the expense of duplication
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- Events are being copied between relays, oftentimes to many different relays
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This NIP allows Clients to connect directly with the most up-to-date relay set from each individual user, eliminating the need of broadcasting events to popular relays.
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## Final Considerations
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1. Clients SHOULD guide users to keep `kind:10002` lists small (2-4 relays).
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2. Clients SHOULD spread an author's `kind:10002` event to as many relays as viable.
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3. `kind:10002` events should primarily be used to advertise the user's preferred relays to others. A user's own client may use other heuristics for selecting relays for fetching data.
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4. DMs SHOULD only be broadcasted to the author's WRITE relays and to the receiver's READ relays to keep maximum privacy.
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5. If a relay signals support for this NIP in their [NIP-11](11.md) document that means they're willing to accept kind 10002 events from a broad range of users, not only their paying customers or whitelisted group.
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6. Clients SHOULD deduplicate connections by normalizing relay URIs according to [RFC 3986](https://datatracker.ietf.org/doc/html/rfc3986#section-6).
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## Related articles
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- [Outbox model](https://mikedilger.com/gossip-model/)
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- [What is the Outbox Model?](https://habla.news/u/hodlbod@coracle.social/8YjqXm4SKY-TauwjOfLXS)
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