feat: track event relays

src/components/Nip22ReplyNoteList/index.tsx

@@ -1,5 +1,6 @@
 import { Separator } from '@/components/ui/separator'
 import { BIG_RELAY_URLS, COMMENT_EVENT_KIND } from '@/constants'
+import { isCommentEvent, isProtectedEvent } from '@/lib/event'
 import { tagNameEquals } from '@/lib/tag'
 import { cn } from '@/lib/utils'
 import { useNostr } from '@/providers/NostrProvider'
@@ -10,7 +11,6 @@ import { Event as NEvent } from 'nostr-tools'
 import { useCallback, useEffect, useRef, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import ReplyNote from '../ReplyNote'
-import { isCommentEvent } from '@/lib/event'
 
 const LIMIT = 100
 
@@ -62,8 +62,13 @@ export default function Nip22ReplyNoteList({
 
       try {
         const relayList = await client.fetchRelayList(event.pubkey)
+        const relayUrls = relayList.read.concat(BIG_RELAY_URLS)
+        if (isProtectedEvent(event)) {
+          const seenOn = client.getSeenEventRelayUrls(event.id)
+          relayUrls.unshift(...seenOn)
+        }
         const { closer, timelineKey } = await client.subscribeTimeline(
-          relayList.read.concat(BIG_RELAY_URLS).slice(0, 4),
+          relayUrls.slice(0, 4),
           {
             '#E': [event.id],
             kinds: [COMMENT_EVENT_KIND],

src/components/ReplyNoteList/index.tsx

@@ -1,5 +1,6 @@
 import { Separator } from '@/components/ui/separator'
-import { isReplyNoteEvent } from '@/lib/event'
+import { BIG_RELAY_URLS } from '@/constants'
+import { isProtectedEvent, isReplyNoteEvent } from '@/lib/event'
 import { isReplyETag, isRootETag } from '@/lib/tag'
 import { cn } from '@/lib/utils'
 import { useNostr } from '@/providers/NostrProvider'
@@ -10,7 +11,6 @@ import { Event as NEvent, kinds } from 'nostr-tools'
 import { useCallback, useEffect, useRef, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import ReplyNote from '../ReplyNote'
-import { BIG_RELAY_URLS } from '@/constants'
 
 const LIMIT = 100
 
@@ -56,8 +56,13 @@ export default function ReplyNoteList({ event, className }: { event: NEvent; cla
 
       try {
         const relayList = await client.fetchRelayList(event.pubkey)
+        const relayUrls = relayList.read.concat(BIG_RELAY_URLS)
+        if (isProtectedEvent(event)) {
+          const seenOn = client.getSeenEventRelayUrls(event.id)
+          relayUrls.unshift(...seenOn)
+        }
         const { closer, timelineKey } = await client.subscribeTimeline(
-          relayList.read.concat(BIG_RELAY_URLS).slice(0, 4),
+          relayUrls.slice(0, 4),
           {
             '#e': [event.id],
             kinds: [kinds.ShortTextNote],

src/lib/event.ts

@@ -41,6 +41,10 @@ export function isPictureEvent(event: Event) {
   return event.kind === PICTURE_EVENT_KIND
 }
 
+export function isProtectedEvent(event: Event) {
+  return event.tags.some(([tagName]) => tagName === '-')
+}
+
 export function getParentEventId(event?: Event) {
   if (!event || !isReplyNoteEvent(event)) return undefined
   return event.tags.find(isReplyETag)?.[1] ?? event.tags.find(tagNameEquals('e'))?.[1]

src/services/client.service.ts

@@ -16,6 +16,7 @@ import {
   SimplePool,
   VerifiedEvent
 } from 'nostr-tools'
+import { AbstractRelay } from 'nostr-tools/abstract-relay'
 
 type TTimelineRef = [string, number]
 
@@ -23,7 +24,7 @@ class ClientService extends EventTarget {
   static instance: ClientService
 
   private defaultRelayUrls: string[] = BIG_RELAY_URLS
-  private pool = new SimplePool()
+  private pool: SimplePool
 
   private timelines: Record<
     string,
@@ -84,6 +85,8 @@ class ClientService extends EventTarget {
 
   constructor() {
     super()
+    this.pool = new SimplePool()
+    this.pool.trackRelays = true
   }
 
   public static getInstance(): ClientService {
@@ -117,13 +120,21 @@ class ClientService extends EventTarget {
     const result = await Promise.any(
       relayUrls.map(async (url) => {
         const relay = await this.pool.ensureRelay(url)
-        return relay.publish(event).catch((error) => {
-          if (error instanceof Error && error.message.startsWith('auth-required:') && signer) {
-            relay.auth((authEvt: EventTemplate) => signer(authEvt)).then(() => relay.publish(event))
-          } else {
-            throw error
-          }
-        })
+        return relay
+          .publish(event)
+          .then((reason) => {
+            this.trackEventSeenOn(event.id, relay)
+            return reason
+          })
+          .catch((error) => {
+            if (error instanceof Error && error.message.startsWith('auth-required:') && signer) {
+              relay
+                .auth((authEvt: EventTemplate) => signer(authEvt))
+                .then(() => relay.publish(event))
+            } else {
+              throw error
+            }
+          })
       })
     )
     this.dispatchEvent(new CustomEvent('eventPublished', { detail: event }))
@@ -203,6 +214,7 @@ class ClientService extends EventTarget {
           },
           onevent: (evt: NEvent) => {
             that.eventDataLoader.prime(evt.id, Promise.resolve(evt))
+            that.trackEventSeenOn(evt.id, relay)
             // not eosed yet, push to events
             if (eosedCount < startedCount) {
               return events.push(evt)
@@ -537,6 +549,10 @@ class ClientService extends EventTarget {
     }
   }
 
+  getSeenEventRelayUrls(eventId: string) {
+    return Array.from(this.pool.seenOn.get(eventId)?.values() || []).map((relay) => relay.url)
+  }
+
   private async fetchEventById(relayUrls: string[], id: string): Promise<NEvent | undefined> {
     const event = await this.fetchEventFromDefaultRelaysDataloader.load(id)
     if (event) {
@@ -740,6 +756,15 @@ class ClientService extends EventTarget {
 
     return followListEvents.sort((a, b) => b.created_at - a.created_at)[0]
   }
+
+  private trackEventSeenOn(eventId: string, relay: AbstractRelay) {
+    let set = this.pool.seenOn.get(eventId)
+    if (!set) {
+      set = new Set()
+      this.pool.seenOn.set(eventId, set)
+    }
+    set.add(relay)
+  }
 }
 
 const instance = ClientService.getInstance()