feat: hide replies from untrusted users

src/App.tsx

@@ -15,6 +15,7 @@ import { NostrProvider } from './providers/NostrProvider'
 import { NoteStatsProvider } from './providers/NoteStatsProvider'
 import { ReplyProvider } from './providers/ReplyProvider'
 import { ScreenSizeProvider } from './providers/ScreenSizeProvider'
+import { UserTrustProvider } from './providers/UserTrustProvider'
 import { ZapProvider } from './providers/ZapProvider'
 
 export default function App(): JSX.Element {
@@ -27,6 +28,7 @@ export default function App(): JSX.Element {
               <FavoriteRelaysProvider>
                 <FollowListProvider>
                   <MuteListProvider>
+                    <UserTrustProvider>
                       <BookmarksProvider>
                         <FeedProvider>
                           <ReplyProvider>
@@ -39,6 +41,7 @@ export default function App(): JSX.Element {
                           </ReplyProvider>
                         </FeedProvider>
                       </BookmarksProvider>
+                    </UserTrustProvider>
                   </MuteListProvider>
                 </FollowListProvider>
               </FavoriteRelaysProvider>

src/components/ReplyNote/index.tsx

@@ -5,6 +5,7 @@ import { useMuteList } from '@/providers/MuteListProvider'
 import { Event } from 'nostr-tools'
 import { useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
+import Collapsible from '../Collapsible'
 import Content from '../Content'
 import { FormattedTimestamp } from '../FormattedTimestamp'
 import NoteOptions from '../NoteOptions'
@@ -12,7 +13,6 @@ import NoteStats from '../NoteStats'
 import ParentNotePreview from '../ParentNotePreview'
 import UserAvatar from '../UserAvatar'
 import Username from '../Username'
-import Collapsible from '../Collapsible'
 
 export default function ReplyNote({
   event,

src/components/ReplyNoteList/index.tsx

@@ -9,6 +9,7 @@ import {
 import { generateEventIdFromETag, tagNameEquals } from '@/lib/tag'
 import { useSecondaryPage } from '@/PageManager'
 import { useReply } from '@/providers/ReplyProvider'
+import { useUserTrust } from '@/providers/UserTrustProvider'
 import client from '@/services/client.service'
 import { Filter, Event as NEvent, kinds } from 'nostr-tools'
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
@@ -31,6 +32,7 @@ export default function ReplyNoteList({
 }) {
   const { t } = useTranslation()
   const { currentIndex } = useSecondaryPage()
+  const { isUserTrusted } = useUserTrust()
   const [rootInfo, setRootInfo] = useState<TRootInfo | undefined>(undefined)
   const { repliesMap, addReplies } = useReply()
   const replies = useMemo(() => {
@@ -248,6 +250,10 @@ export default function ReplyNoteList({
       {replies.length > 0 && (loading || until) && <Separator className="mt-2" />}
       <div className={className}>
         {replies.slice(0, showCount).map((reply) => {
+          if (!isUserTrusted(reply.pubkey)) {
+            return null
+          }
+
           const parentEventTag = getParentEventTag(reply)
           const parentEventOriginalId = parentEventTag?.[1]
           const parentEventId = parentEventTag ? generateEventIdFromETag(parentEventTag) : undefined

src/constants.ts

@@ -14,6 +14,7 @@ export const StorageKey = {
   ACCOUNT_FEED_INFO_MAP: 'accountFeedInfoMap',
   MEDIA_UPLOAD_SERVICE: 'mediaUploadService',
   AUTOPLAY: 'autoplay',
+  HIDE_UNTRUSTED_REPLIES: 'hideUntrustedReplies',
   ACCOUNT_RELAY_LIST_EVENT_MAP: 'accountRelayListEventMap', // deprecated
   ACCOUNT_FOLLOW_LIST_EVENT_MAP: 'accountFollowListEventMap', // deprecated
   ACCOUNT_MUTE_LIST_EVENT_MAP: 'accountMuteListEventMap', // deprecated

src/pages/secondary/GeneralSettingsPage/index.tsx

@@ -6,6 +6,7 @@ import SecondaryPageLayout from '@/layouts/SecondaryPageLayout'
 import { cn } from '@/lib/utils'
 import { useAutoplay } from '@/providers/AutoplayProvider'
 import { useTheme } from '@/providers/ThemeProvider'
+import { useUserTrust } from '@/providers/UserTrustProvider'
 import { SelectValue } from '@radix-ui/react-select'
 import { forwardRef, HTMLProps, useState } from 'react'
 import { useTranslation } from 'react-i18next'
@@ -15,6 +16,8 @@ const GeneralSettingsPage = forwardRef(({ index }: { index?: number }, ref) => {
   const [language, setLanguage] = useState<TLanguage>(i18n.language as TLanguage)
   const { themeSetting, setThemeSetting } = useTheme()
   const { autoplay, setAutoplay } = useAutoplay()
+  const { enabled: hideUntrustedRepliesEnabled, updateEnabled: updateHideUntrustedRepliesEnabled } =
+    useUserTrust()
 
   const handleLanguageChange = (value: TLanguage) => {
     i18n.changeLanguage(value)
@@ -63,6 +66,19 @@ const GeneralSettingsPage = forwardRef(({ index }: { index?: number }, ref) => {
           </Label>
           <Switch id="autoplay" checked={autoplay} onCheckedChange={setAutoplay} />
         </SettingItem>
+        <SettingItem>
+          <Label htmlFor="hide-untrusted-replies" className="text-base font-normal">
+            {t('Hide replies from untrusted users')}
+            <div className="text-muted-foreground">
+              {t('Only show replies from your followed users and the users they follow')}
+            </div>
+          </Label>
+          <Switch
+            id="hide-untrusted-replies"
+            checked={hideUntrustedRepliesEnabled}
+            onCheckedChange={updateHideUntrustedRepliesEnabled}
+          />
+        </SettingItem>
       </div>
     </SecondaryPageLayout>
   )

src/providers/UserTrustProvider.tsx

@@ -0,0 +1,59 @@
+import client from '@/services/client.service'
+import { createContext, useContext, useEffect, useState } from 'react'
+import { useNostr } from './NostrProvider'
+import storage from '@/services/local-storage.service'
+
+type TUserTrustContext = {
+  enabled: boolean
+  updateEnabled: (enabled: boolean) => void
+  isUserTrusted: (pubkey: string) => boolean
+}
+
+const UserTrustContext = createContext<TUserTrustContext | undefined>(undefined)
+
+export const useUserTrust = () => {
+  const context = useContext(UserTrustContext)
+  if (!context) {
+    throw new Error('useUserTrust must be used within a UserTrustProvider')
+  }
+  return context
+}
+
+const wotSet = new Set<string>()
+
+export function UserTrustProvider({ children }: { children: React.ReactNode }) {
+  const { pubkey: currentPubkey } = useNostr()
+  const [enabled, setEnabled] = useState(storage.getHideUntrustedReplies())
+
+  useEffect(() => {
+    if (!currentPubkey) return
+
+    const initWoT = async () => {
+      const followings = await client.fetchFollowings(currentPubkey)
+      await Promise.allSettled(
+        followings.map(async (pubkey) => {
+          wotSet.add(pubkey)
+          const _followings = await client.fetchFollowings(pubkey)
+          _followings.forEach((following) => wotSet.add(following))
+        })
+      )
+    }
+    initWoT()
+  }, [currentPubkey])
+
+  const updateEnabled = (enabled: boolean) => {
+    setEnabled(enabled)
+    storage.setHideUntrustedReplies(enabled)
+  }
+
+  const isUserTrusted = (pubkey: string) => {
+    if (!currentPubkey || !enabled) return true
+    return wotSet.has(pubkey)
+  }
+
+  return (
+    <UserTrustContext.Provider value={{ enabled, updateEnabled, isUserTrusted }}>
+      {children}
+    </UserTrustContext.Provider>
+  )
+}

src/services/client.service.ts

@@ -56,6 +56,13 @@ class ClientService extends EventTarget {
       maxBatchSize: 500
     }
   )
+  private fetchFollowListEventFromBigRelaysDataloader = new DataLoader<string, NEvent | undefined>(
+    this.followListEventBatchLoadFn.bind(this),
+    {
+      batchScheduleFn: (callback) => setTimeout(callback, 50),
+      maxBatchSize: 500
+    }
+  )
   private relayListEventDataLoader = new DataLoader<string, NEvent | undefined>(
     this.relayListEventBatchLoadFn.bind(this),
     {
@@ -659,7 +666,6 @@ class ClientService extends EventTarget {
     const profileFromBigRelays = await this.fetchProfileEventFromBigRelaysDataloader.load(pubkey)
     if (profileFromBigRelays) {
       this.addUsernameToIndex(profileFromBigRelays)
-      await indexedDb.putReplaceableEvent(profileFromBigRelays)
       return profileFromBigRelays
     }
 
@@ -755,12 +761,8 @@ class ClientService extends EventTarget {
     await this.relayListEventBatchLoadFn([pubkey])
   }
 
-  async fetchFollowListEvent(pubkey: string, storeToIndexedDb = false) {
+  async fetchFollowListEvent(pubkey: string) {
-    const event = await this.followListCache.fetch(pubkey)
+    return await this.followListCache.fetch(pubkey)
-    if (storeToIndexedDb && event) {
-      await indexedDb.putReplaceableEvent(event)
-    }
-    return event
   }
 
   async fetchBookmarkListEvent(pubkey: string): Promise<NEvent | undefined> {
@@ -778,8 +780,8 @@ class ClientService extends EventTarget {
     return events.sort((a, b) => b.created_at - a.created_at)[0]
   }
 
-  async fetchFollowings(pubkey: string, storeToIndexedDb = false) {
+  async fetchFollowings(pubkey: string) {
-    const followListEvent = await this.fetchFollowListEvent(pubkey, storeToIndexedDb)
+    const followListEvent = await this.fetchFollowListEvent(pubkey)
     return followListEvent ? extractPubkeysFromEventTags(followListEvent.tags) : []
   }
 
@@ -826,11 +828,13 @@ class ClientService extends EventTarget {
 
   updateFollowListCache(event: NEvent) {
     this.followListCache.set(event.pubkey, Promise.resolve(event))
+    indexedDb.putReplaceableEvent(event)
   }
 
   updateRelayListCache(event: NEvent) {
     this.relayListEventDataLoader.clear(event.pubkey)
     this.relayListEventDataLoader.prime(event.pubkey, Promise.resolve(event))
+    indexedDb.putReplaceableEvent(event)
   }
 
   async searchNpubsFromCache(query: string, limit: number = 100) {
@@ -845,7 +849,7 @@ class ClientService extends EventTarget {
   }
 
   async initUserIndexFromFollowings(pubkey: string, signal: AbortSignal) {
-    const followings = await this.fetchFollowings(pubkey, true)
+    const followings = await this.fetchFollowings(pubkey)
     for (let i = 0; i * 20 < followings.length; i++) {
       if (signal.aborted) return
       await Promise.all(
@@ -1016,6 +1020,30 @@ class ClientService extends EventTarget {
     return profileEvents
   }
 
+  private async followListEventBatchLoadFn(pubkeys: readonly string[]) {
+    const events = await this.query(BIG_RELAY_URLS, {
+      authors: Array.from(new Set(pubkeys)),
+      kinds: [kinds.Contacts],
+      limit: pubkeys.length
+    })
+    const eventsMap = new Map<string, NEvent>()
+    for (const event of events) {
+      const pubkey = event.pubkey
+      const existing = eventsMap.get(pubkey)
+      if (!existing || existing.created_at < event.created_at) {
+        eventsMap.set(pubkey, event)
+      }
+    }
+    const followListEvents = pubkeys.map((pubkey) => {
+      return eventsMap.get(pubkey)
+    })
+
+    followListEvents.forEach(
+      (followListEvent) => followListEvent && indexedDb.putReplaceableEvent(followListEvent)
+    )
+    return followListEvents
+  }
+
   private async relayListEventBatchLoadFn(pubkeys: readonly string[]) {
     const events = await this.query(BIG_RELAY_URLS, {
       authors: pubkeys as string[],
@@ -1047,9 +1075,19 @@ class ClientService extends EventTarget {
     if (storedFollowListEvent) {
       return storedFollowListEvent
     }
+    const followListEventFromBigRelays =
+      await this.fetchFollowListEventFromBigRelaysDataloader.load(pubkey)
+    if (followListEventFromBigRelays) {
+      return followListEventFromBigRelays
+    }
 
     const relayList = await this.fetchRelayList(pubkey)
-    const followListEvents = await this.query(relayList.write.concat(BIG_RELAY_URLS), {
+    const relays = relayList.write.filter((url) => !BIG_RELAY_URLS.includes(url))
+    if (!relays.length) {
+      return undefined
+    }
+
+    const followListEvents = await this.query(relays, {
       authors: [pubkey],
       kinds: [kinds.Contacts]
     })

src/services/local-storage.service.ts

@@ -25,6 +25,7 @@ class LocalStorageService {
   private accountFeedInfoMap: Record<string, TFeedInfo | undefined> = {}
   private mediaUploadService: string = DEFAULT_NIP_96_SERVICE
   private autoplay: boolean = true
+  private hideUntrustedReplies: boolean = true
 
   constructor() {
     if (!LocalStorageService.instance) {
@@ -92,6 +93,9 @@ class LocalStorageService {
 
     this.autoplay = window.localStorage.getItem(StorageKey.AUTOPLAY) !== 'false'
 
+    this.hideUntrustedReplies =
+      window.localStorage.getItem(StorageKey.HIDE_UNTRUSTED_REPLIES) !== 'false'
+
     // Clean up deprecated data
     window.localStorage.removeItem(StorageKey.ACCOUNT_PROFILE_EVENT_MAP)
     window.localStorage.removeItem(StorageKey.ACCOUNT_FOLLOW_LIST_EVENT_MAP)
@@ -247,6 +251,14 @@ class LocalStorageService {
     this.autoplay = autoplay
     window.localStorage.setItem(StorageKey.AUTOPLAY, autoplay.toString())
   }
+
+  getHideUntrustedReplies() {
+    return this.hideUntrustedReplies
+  }
+  setHideUntrustedReplies(hide: boolean) {
+    this.hideUntrustedReplies = hide
+    window.localStorage.setItem(StorageKey.HIDE_UNTRUSTED_REPLIES, hide.toString())
+  }
 }
 
 const instance = new LocalStorageService()