feat: sync relay sets

src/lib/draft-event.ts

@@ -1,5 +1,5 @@
 import { COMMENT_EVENT_KIND, PICTURE_EVENT_KIND } from '@/constants'
-import { TDraftEvent } from '@/types'
+import { TDraftEvent, TRelaySet } from '@/types'
 import dayjs from 'dayjs'
 import { Event, kinds } from 'nostr-tools'
 import {
@@ -82,6 +82,20 @@ export async function createShortTextNoteDraftEvent(
   }
 }
 
+// https://github.com/nostr-protocol/nips/blob/master/51.md
+export function createRelaySetDraftEvent(relaySet: TRelaySet): TDraftEvent {
+  return {
+    kind: kinds.Relaysets,
+    content: '',
+    tags: [
+      ['d', relaySet.id],
+      ['title', relaySet.name],
+      ...relaySet.relayUrls.map((url) => ['relay', url])
+    ],
+    created_at: dayjs().unix()
+  }
+}
+
 export async function createPictureNoteDraftEvent(
   content: string,
   options: {

src/lib/event.ts

@@ -64,6 +64,18 @@ export function getUsingClient(event: Event) {
   return event.tags.find(tagNameEquals('client'))?.[1]
 }
 
+export function getFollowingsFromFollowListEvent(event: Event) {
+  return Array.from(
+    new Set(
+      event.tags
+        .filter(tagNameEquals('p'))
+        .map(([, pubkey]) => pubkey)
+        .filter(Boolean)
+        .reverse()
+    )
+  )
+}
+
 export async function extractMentions(content: string, parentEvent?: Event) {
   const pubkeySet = new Set<string>()
   const relatedEventIdSet = new Set<string>()

src/lib/random.ts

@@ -0,0 +1,9 @@
+const SEED = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
+
+export function randomString(len = 32) {
+  let str = ''
+  for (let i = 0; i < len; i++) {
+    str += SEED[Math.floor(Math.random() * SEED.length)]
+  }
+  return str
+}