draft optional
This NIP enables authors to post exclusively into topics, without polluting their main feed. Authors can post to locations, hashtags, labels, and urls in a way that only followers of those topics will receive their posts.
Kind 21 defines a kind:1-equivalent event that MUST NOT be displayed unless the user follows one of the g, t, r, or l tags.
{
"kind": 21,
"tags": [
["g", "<geohash>"],
["t", "<hashtag>"],
["r", "<url>"],
//..
["L", "<label namespace>"],
["l", "<label>", "<label namespace>"],
],
"content": "This is a note for followers of the hashtag, location, OR url. My followers should not see this.",
//...
}Clients MUST include at least one g, t, r, or l tags.
.content MUST be plain text and tags that mention, quote and assemble threading structures MUST follow NIP-10.
Kind 30021 defines a following topic. It registers a list of relays to aggregate events for the list of topics.
The d tag of this kind is a simple UUID. g, t, r, or l tags define the topics to be followed and the relay tag specifies which relays to use for those topics. The title tag adds a name for the topic.
{
"kind": 30021,
"tags": [
["d", "<UUID>"],
["g", "<geohash>"],
["t", "<hashtag>"],
["r", "<url>"],
["relay", "wss://my-city-owned-relay"],
["relay", "wss://independent-but-city-based-relay"],
// ... other tags
["title", "Name of this topic"]
],
"content": nip44Encrypt([
["relay", "wss://my-city-owned-relay2"], // private relay
["title", "Name of this topic"] // private topic title
["t", "<hashtag>"], // private follows of tags.
// ... other tags
]),
//...other fields
}The .content contains a list of private tags.
Clients MUST seek and broadcast events from and to the relays defined for each topic.