feat: NIP-43

src/lib/draft-event.ts

@@ -493,6 +493,25 @@ export function createRelayReviewDraftEvent(
   }
 }
 
+// https://github.com/nostr-protocol/nips/blob/master/43.md
+export function createJoinDraftEvent(inviteCode: string): TDraftEvent {
+  return {
+    kind: 28934,
+    created_at: Math.floor(Date.now() / 1000),
+    tags: [['claim', inviteCode], ['-']],
+    content: ''
+  }
+}
+
+export function createLeaveDraftEvent(): TDraftEvent {
+  return {
+    kind: 28936,
+    created_at: Math.floor(Date.now() / 1000),
+    tags: [['-']],
+    content: ''
+  }
+}
+
 function generateImetaTags(imageUrls: string[]) {
   return imageUrls
     .map((imageUrl) => {

src/lib/event.ts

@@ -363,3 +363,8 @@ export function getRetainedEvent(a: Event, b: Event): Event {
   }
   return b
 }
+
+// Descending sort
+export function sortEventsDesc(events: Event[]): Event[] {
+  return events.sort((a, b) => compareEvents(b, a))
+}

src/lib/relay.ts

@@ -9,6 +9,10 @@ export function checkSearchRelay(relayInfo: TRelayInfo | undefined) {
   return relayInfo?.supported_nips?.includes(50)
 }
 
+export function checkNip43Support(relayInfo: TRelayInfo | undefined) {
+  return relayInfo?.supported_nips?.includes(43) && !!relayInfo.pubkey
+}
+
 export function filterOutBigRelays(relayUrls: string[]) {
   return relayUrls.filter((url) => !BIG_RELAY_URLS.includes(url))
 }