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77 lines
2.4 KiB
Markdown
77 lines
2.4 KiB
Markdown
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NIP-25
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======
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Reactions
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---------
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`final` `optional`
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A reaction is a `kind 7` event that is used to react to other events.
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The generic reaction, represented by the `content` set to a `+` string, SHOULD
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be interpreted as a "like" or "upvote".
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A reaction with `content` set to `-` SHOULD be interpreted as a "dislike" or
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"downvote". It SHOULD NOT be counted as a "like", and MAY be displayed as a
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downvote or dislike on a post. A client MAY also choose to tally likes against
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dislikes in a reddit-like system of upvotes and downvotes, or display them as
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separate tallies.
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The `content` MAY be an emoji, or [NIP-30](30.md) custom emoji in this case it MAY be interpreted as a "like" or "dislike",
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or the client MAY display this emoji reaction on the post. If the `content` is an empty string then the client should
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consider it a "+".
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Tags
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----
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The reaction event SHOULD include `e` and `p` tags from the note the user is
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reacting to. This allows users to be notified of reactions to posts they were
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mentioned in. Including the `e` tags enables clients to pull all the reactions
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associated with individual posts or all the posts in a thread.
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The last `e` tag MUST be the `id` of the note that is being reacted to.
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The last `p` tag MUST be the `pubkey` of the event being reacted to.
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The reaction event MAY include a `k` tag with the stringified kind number
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of the reacted event as its value.
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Example code
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```swift
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func make_like_event(pubkey: String, privkey: String, liked: NostrEvent) -> NostrEvent {
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var tags: [[String]] = liked.tags.filter {
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tag in tag.count >= 2 && (tag[0] == "e" || tag[0] == "p")
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}
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tags.append(["e", liked.id])
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tags.append(["p", liked.pubkey])
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tags.append(["k", liked.kind])
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let ev = NostrEvent(content: "+", pubkey: pubkey, kind: 7, tags: tags)
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ev.calculate_id()
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ev.sign(privkey: privkey)
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return ev
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}
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```
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Custom Emoji Reaction
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---------------------
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The client may specify a custom emoji ([NIP-30](30.md)) `:shortcode:` in the
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reaction content. The client should refer to the emoji tag and render the
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content as an emoji if shortcode is specified.
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```json
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{
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"kind": 7,
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"content": ":soapbox:",
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"tags": [
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["emoji", "soapbox", "https://gleasonator.com/emoji/Gleasonator/soapbox.png"]
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],
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"pubkey": "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6",
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"created_at": 1682790000
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}
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```
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The content can be set only one `:shortcode:`. And emoji tag should be one.
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