Merge branch 'master' into vending-machine

1 files changed, 7 insertions, 2 deletions

diff --git a/25.md b/25.md
index 86ce763..7b29140 100644
--- a/25.md
+++ b/25.md
@@ -7,7 +7,7 @@ Reactions
 
 `draft` `optional` `author:jb55`
 
-A reaction is a `kind 7` note that is used to react to other notes.
+A reaction is a `kind 7` event that is used to react to other events.
 
 The generic reaction, represented by the `content` set to a `+` string, SHOULD
 be interpreted as a "like" or "upvote".
@@ -19,7 +19,8 @@ dislikes in a reddit-like system of upvotes and downvotes, or display them as
 separate tallies.
 
 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",
-or the client MAY display this emoji reaction on the post.
+or the client MAY display this emoji reaction on the post. If the `content` is an empty string then the client should
+consider it a "+".
 
 Tags
 ----
@@ -33,6 +34,9 @@ The last `e` tag MUST be the `id` of the note that is being reacted to.
 
 The last `p` tag MUST be the `pubkey` of the event being reacted to.
 
+The reaction event MAY include a `k` tag with the stringified kind number
+of the reacted event as its value.
+
 Example code
 
 ```swift
@@ -42,6 +46,7 @@ func make_like_event(pubkey: String, privkey: String, liked: NostrEvent) -> Nost
     }
     tags.append(["e", liked.id])
     tags.append(["p", liked.pubkey])
+    tags.append(["k", liked.kind])
     let ev = NostrEvent(content: "+", pubkey: pubkey, kind: 7, tags: tags)
     ev.calculate_id()
     ev.sign(privkey: privkey)