Adds an indexer relay list

amethyst/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

@@ -60,6 +60,8 @@ import com.vitorpamplona.amethyst.model.nip51Lists.geohashLists.GeohashListDecry
 import com.vitorpamplona.amethyst.model.nip51Lists.geohashLists.GeohashListState
 import com.vitorpamplona.amethyst.model.nip51Lists.hashtagLists.HashtagListDecryptionCache
 import com.vitorpamplona.amethyst.model.nip51Lists.hashtagLists.HashtagListState
+import com.vitorpamplona.amethyst.model.nip51Lists.indexerRelays.IndexerRelayListDecryptionCache
+import com.vitorpamplona.amethyst.model.nip51Lists.indexerRelays.IndexerRelayListState
 import com.vitorpamplona.amethyst.model.nip51Lists.muteList.MuteListDecryptionCache
 import com.vitorpamplona.amethyst.model.nip51Lists.muteList.MuteListState
 import com.vitorpamplona.amethyst.model.nip51Lists.searchRelays.SearchRelayListDecryptionCache
@@ -247,6 +249,9 @@ class Account(
     val broadcastRelayListDecryptionCache = BroadcastRelayListDecryptionCache(signer)
     val broadcastRelayList = BroadcastRelayListState(signer, cache, broadcastRelayListDecryptionCache, scope, settings)
 
+    val indexerRelayListDecryptionCache = IndexerRelayListDecryptionCache(signer)
+    val indexerRelayList = IndexerRelayListState(signer, cache, indexerRelayListDecryptionCache, scope, settings)
+
     val blockedRelayListDecryptionCache = BlockedRelayListDecryptionCache(signer)
     val blockedRelayList = BlockedRelayListState(signer, cache, blockedRelayListDecryptionCache, scope, settings)
 
@@ -293,7 +298,7 @@ class Account(
 
     // Follows Relays
     val followOutboxes = FollowListOutboxRelays(kind3FollowList, blockedRelayList, cache, scope)
-    val followPlusAllMine = MergedFollowPlusMineRelayListsState(followOutboxes, nip65RelayList, privateStorageRelayList, localRelayList, trustedRelayList, broadcastRelayList, scope)
+    val followPlusAllMine = MergedFollowPlusMineRelayListsState(followOutboxes, nip65RelayList, privateStorageRelayList, localRelayList, trustedRelayList, broadcastRelayList, indexerRelayList, scope)
 
     // keeps a cache of the outbox relays for each author
     val followsPerRelay = FollowsPerOutboxRelay(kind3FollowList, blockedRelayList, cache, scope).flow
@@ -871,7 +876,7 @@ class Account(
     }
 
     fun sendLiterallyEverywhere(event: Event) {
-        client.send(event, outboxRelays.flow.value + client.relayStatusFlow().value.available)
+        client.send(event, outboxRelays.flow.value + indexerRelayList.flow.value + client.relayStatusFlow().value.available)
         cache.justConsumeMyOwnEvent(event)
     }
 
@@ -1719,6 +1724,8 @@ class Account(
 
     suspend fun saveSearchRelayList(searchRelays: List<NormalizedRelayUrl>) = sendMyPublicAndPrivateOutbox(searchRelayList.saveRelayList(searchRelays))
 
+    suspend fun saveIndexerRelayList(trustedRelays: List<NormalizedRelayUrl>) = sendMyPublicAndPrivateOutbox(indexerRelayList.saveRelayList(trustedRelays))
+
     suspend fun saveBroadcastRelayList(trustedRelays: List<NormalizedRelayUrl>) = sendMyPublicAndPrivateOutbox(broadcastRelayList.saveRelayList(trustedRelays))
 
     suspend fun saveTrustedRelayList(trustedRelays: List<NormalizedRelayUrl>) = sendMyPublicAndPrivateOutbox(trustedRelayList.saveRelayList(trustedRelays))

amethyst/src/main/java/com/vitorpamplona/amethyst/model/AccountSettings.kt

@@ -84,6 +84,8 @@ val DefaultDMRelayList = listOf(Constants.auth, Constants.oxchat, Constants.nos)
 
 val DefaultSearchRelayList = setOf(Constants.band, Constants.wine, Constants.where, Constants.nostoday)
 
+val DefaultIndexerRelayList = setOf(Constants.purplepages, Constants.coracle, Constants.userkinds)
+
 val DefaultSignerPermissions =
     listOf(
         Permission(CommandType.SIGN_EVENT, RelayAuthEvent.KIND),

amethyst/src/main/java/com/vitorpamplona/amethyst/model/Constants.kt

@@ -43,6 +43,10 @@ object Constants {
     val auth = RelayUrlNormalizer.normalize("wss://auth.nostr1.com")
     val oxchat = RelayUrlNormalizer.normalize("wss://relay.0xchat.com")
 
+    val purplepages = RelayUrlNormalizer.normalize("wss://purplepag.es")
+    val coracle = RelayUrlNormalizer.normalize("wss://indexer.coracle.social")
+    val userkinds = RelayUrlNormalizer.normalize("wss://user.kindpag.es")
+
     val eventFinderRelays = setOf(band, wine, damus, primal, mom, nos, bitcoiner, oxtr, fmtwiz, bg)
 
     val defaultSearchRelaySet = setOf(band, wine, where)

amethyst/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -139,6 +139,7 @@ import com.vitorpamplona.quartz.nip51Lists.muteList.MuteListEvent
 import com.vitorpamplona.quartz.nip51Lists.peopleList.PeopleListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BroadcastRelayListEvent
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relaySets.RelaySetEvent
 import com.vitorpamplona.quartz.nip52Calendar.CalendarDateSlotEvent
@@ -958,6 +959,12 @@ object LocalCache : ILocalCache {
         wasVerified: Boolean,
     ) = consumeBaseReplaceable(event, relay, wasVerified)
 
+    private fun consume(
+        event: IndexerRelayListEvent,
+        relay: NormalizedRelayUrl?,
+        wasVerified: Boolean,
+    ) = consumeBaseReplaceable(event, relay, wasVerified)
+
     private fun consume(
         event: BroadcastRelayListEvent,
         relay: NormalizedRelayUrl?,
@@ -2760,6 +2767,7 @@ object LocalCache : ILocalCache {
                 is GitRepositoryEvent -> consume(event, relay, wasVerified)
                 is HashtagListEvent -> consume(event, relay, wasVerified)
                 is HighlightEvent -> consume(event, relay, wasVerified)
+                is IndexerRelayListEvent -> consume(event, relay, wasVerified)
                 is InteractiveStoryPrologueEvent -> consume(event, relay, wasVerified)
                 is InteractiveStorySceneEvent -> consume(event, relay, wasVerified)
                 is InteractiveStoryReadingStateEvent -> consume(event, relay, wasVerified)

amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip51Lists/indexerRelays/IndexerRelayListDecryptionCache.kt

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.model.nip51Lists.indexerRelays
+
+import com.vitorpamplona.amethyst.model.nip51Lists.relayLists.GenericRelayListCache
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
+
+class IndexerRelayListDecryptionCache(
+    signer: NostrSigner,
+) : GenericRelayListCache<IndexerRelayListEvent>(signer)

amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip51Lists/indexerRelays/IndexerRelayListState.kt

@@ -0,0 +1,88 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.model.nip51Lists.indexerRelays
+
+import com.vitorpamplona.amethyst.model.AccountSettings
+import com.vitorpamplona.amethyst.model.AddressableNote
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.NoteState
+import com.vitorpamplona.amethyst.model.nip51Lists.indexerRelays.IndexerRelayListDecryptionCache
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onStart
+import kotlinx.coroutines.flow.stateIn
+
+class IndexerRelayListState(
+    val signer: NostrSigner,
+    val cache: LocalCache,
+    val decryptionCache: IndexerRelayListDecryptionCache,
+    val scope: CoroutineScope,
+    val settings: AccountSettings,
+) {
+    fun getIndexerRelayListAddress() = IndexerRelayListEvent.createAddress(signer.pubKey)
+
+    fun getIndexerRelayListNote(): AddressableNote = cache.getOrCreateAddressableNote(getIndexerRelayListAddress())
+
+    fun getIndexerRelayListFlow(): StateFlow<NoteState> = getIndexerRelayListNote().flow().metadata.stateFlow
+
+    fun getIndexerRelayList(): IndexerRelayListEvent? = getIndexerRelayListNote().event as? IndexerRelayListEvent
+
+    suspend fun normalizeIndexerRelayListWithBackup(note: Note): Set<NormalizedRelayUrl> {
+        val event = note.event as? IndexerRelayListEvent
+        return event?.let { decryptionCache.relays(it) } ?: emptySet()
+    }
+
+    val flow =
+        getIndexerRelayListFlow()
+            .map { normalizeIndexerRelayListWithBackup(it.note) }
+            .onStart { emit(normalizeIndexerRelayListWithBackup(getIndexerRelayListNote())) }
+            .flowOn(Dispatchers.Default)
+            .stateIn(
+                scope,
+                SharingStarted.Eagerly,
+                emptySet(),
+            )
+
+    suspend fun saveRelayList(indexerRelays: List<NormalizedRelayUrl>): IndexerRelayListEvent {
+        val relayListForIndexer = getIndexerRelayList()
+
+        return if (relayListForIndexer != null && relayListForIndexer.tags.isNotEmpty()) {
+            IndexerRelayListEvent.updateRelayList(
+                earlierVersion = relayListForIndexer,
+                relays = indexerRelays,
+                signer = signer,
+            )
+        } else {
+            IndexerRelayListEvent.create(
+                relays = indexerRelays,
+                signer = signer,
+            )
+        }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/model/serverList/MergedFollowPlusMineRelayListsState.kt

@@ -24,6 +24,7 @@ import com.vitorpamplona.amethyst.model.edits.PrivateStorageRelayListState
 import com.vitorpamplona.amethyst.model.localRelays.LocalRelayListState
 import com.vitorpamplona.amethyst.model.nip02FollowLists.FollowListOutboxRelays
 import com.vitorpamplona.amethyst.model.nip51Lists.broadcastRelays.BroadcastRelayListState
+import com.vitorpamplona.amethyst.model.nip51Lists.indexerRelays.IndexerRelayListState
 import com.vitorpamplona.amethyst.model.nip51Lists.trustedRelays.TrustedRelayListState
 import com.vitorpamplona.amethyst.model.nip65RelayList.Nip65RelayListState
 import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
@@ -43,6 +44,7 @@ class MergedFollowPlusMineRelayListsState(
     val localRelayList: LocalRelayListState,
     val trustedRelayList: TrustedRelayListState,
     val broadcastRelayList: BroadcastRelayListState,
+    val indexerRelayList: IndexerRelayListState,
     val scope: CoroutineScope,
 ) {
     fun mergeLists(lists: Array<Set<NormalizedRelayUrl>>): Set<NormalizedRelayUrl> = lists.reduce { acc, set -> acc + set }
@@ -57,6 +59,7 @@ class MergedFollowPlusMineRelayListsState(
                 localRelayList.flow,
                 trustedRelayList.flow,
                 broadcastRelayList.flow,
+                indexerRelayList.flow,
             ),
             ::mergeLists,
         ).onStart {
@@ -70,6 +73,7 @@ class MergedFollowPlusMineRelayListsState(
                         localRelayList.flow.value,
                         trustedRelayList.flow.value,
                         broadcastRelayList.flow.value,
+                        indexerRelayList.flow.value,
                     ),
                 ),
             )
@@ -86,6 +90,7 @@ class MergedFollowPlusMineRelayListsState(
                         localRelayList.flow.value,
                         trustedRelayList.flow.value,
                         broadcastRelayList.flow.value,
+                        indexerRelayList.flow.value,
                     ),
                 ),
             )

amethyst/src/main/java/com/vitorpamplona/amethyst/service/relayClient/reqCommand/account/metadata/FilterAccountInfoAndListsFromKey.kt

@@ -33,6 +33,7 @@ import com.vitorpamplona.quartz.nip38UserStatus.StatusEvent
 import com.vitorpamplona.quartz.nip50Search.SearchRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BroadcastRelayListEvent
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip65RelayList.AdvertisedRelayListEvent
 import com.vitorpamplona.quartz.nip78AppData.AppSpecificDataEvent
@@ -57,6 +58,7 @@ val AccountInfoAndListsFromKeyKinds2 =
         BlockedRelayListEvent.KIND,
         TrustedRelayListEvent.KIND,
         BroadcastRelayListEvent.KIND,
+        IndexerRelayListEvent.KIND,
     )
 
 val AmethystMetadataKinds = listOf(AppSpecificDataEvent.KIND)

amethyst/src/main/java/com/vitorpamplona/amethyst/service/relayClient/reqCommand/account/metadata/FilterBasicAccountInfoFromKeys.kt

@@ -30,6 +30,7 @@ import com.vitorpamplona.quartz.nip17Dm.settings.ChatMessageRelayListEvent
 import com.vitorpamplona.quartz.nip50Search.SearchRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BroadcastRelayListEvent
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip65RelayList.AdvertisedRelayListEvent
 import com.vitorpamplona.quartz.nip96FileStorage.config.FileServersEvent
@@ -51,6 +52,7 @@ val BasicAccountInfoKinds2 =
         BlockedRelayListEvent.KIND,
         TrustedRelayListEvent.KIND,
         BroadcastRelayListEvent.KIND,
+        IndexerRelayListEvent.KIND,
     )
 
 fun filterBasicAccountInfoFromKeys(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -82,6 +82,7 @@ import com.vitorpamplona.amethyst.ui.note.types.DisplayBlockedRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayBroadcastRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayDMRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayFollowList
+import com.vitorpamplona.amethyst.ui.note.types.DisplayIndexerRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayNIP65RelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayPeopleList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayRelaySet
@@ -189,6 +190,7 @@ import com.vitorpamplona.quartz.nip51Lists.followList.FollowListEvent
 import com.vitorpamplona.quartz.nip51Lists.peopleList.PeopleListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BroadcastRelayListEvent
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relaySets.RelaySetEvent
 import com.vitorpamplona.quartz.nip53LiveActivities.chat.LiveActivitiesChatMessageEvent
@@ -656,6 +658,7 @@ private fun RenderNoteRow(
         is SearchRelayListEvent -> DisplaySearchRelayList(baseNote, backgroundColor, accountViewModel, nav)
         is BlockedRelayListEvent -> DisplayBlockedRelayList(baseNote, backgroundColor, accountViewModel, nav)
         is TrustedRelayListEvent -> DisplayTrustedRelayList(baseNote, backgroundColor, accountViewModel, nav)
+        is IndexerRelayListEvent -> DisplayIndexerRelayList(baseNote, backgroundColor, accountViewModel, nav)
         is BroadcastRelayListEvent -> DisplayBroadcastRelayList(baseNote, backgroundColor, accountViewModel, nav)
         is PinListEvent -> RenderPinListEvent(baseNote, backgroundColor, accountViewModel, nav)
         is EmojiPackEvent -> RenderEmojiPack(baseNote, true, backgroundColor, accountViewModel)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/RelayList.kt

@@ -234,6 +234,27 @@ fun DisplayTrustedRelayList(
     )
 }
 
+@Composable
+fun DisplayIndexerRelayList(
+    baseNote: Note,
+    backgroundColor: MutableState<Color>,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val relays by accountViewModel.account.indexerRelayListDecryptionCache.observeDecryptedRelayList(baseNote).collectAsStateWithLifecycle(
+        accountViewModel.account.indexerRelayListDecryptionCache.fastStartValueForRelayList(baseNote),
+    )
+
+    DisplayRelaySet(
+        relays,
+        stringRes(id = R.string.indexer_relays_title),
+        null,
+        backgroundColor,
+        accountViewModel,
+        nav,
+    )
+}
+
 @Composable
 fun DisplayBroadcastRelayList(
     baseNote: Note,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/relays/AllRelayListScreen.kt

@@ -41,6 +41,7 @@ import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.DefaultDMRelayList
+import com.vitorpamplona.amethyst.model.DefaultIndexerRelayList
 import com.vitorpamplona.amethyst.model.DefaultSearchRelayList
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.navigation.topbars.SavingTopBar
@@ -54,6 +55,8 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.connected.ConnectedR
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.connected.renderConnectedItems
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.dm.DMRelayListViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.dm.renderDMItems
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.indexer.IndexerRelayListViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.indexer.renderIndexerItems
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.local.LocalRelayListViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.local.renderLocalItems
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.nip37.PrivateOutboxRelayListViewModel
@@ -86,6 +89,7 @@ fun AllRelayListScreen(
     val localViewModel: LocalRelayListViewModel = viewModel()
     val connectedViewModel: ConnectedRelayListViewModel = viewModel()
     val broadcastViewModel: BroadcastRelayListViewModel = viewModel()
+    val indexerViewModel: IndexerRelayListViewModel = viewModel()
 
     dmViewModel.init(accountViewModel)
     nip65ViewModel.init(accountViewModel)
@@ -96,6 +100,7 @@ fun AllRelayListScreen(
     blockedViewModel.init(accountViewModel)
     trustedViewModel.init(accountViewModel)
     broadcastViewModel.init(accountViewModel)
+    indexerViewModel.init(accountViewModel)
 
     LaunchedEffect(accountViewModel) {
         dmViewModel.load()
@@ -107,6 +112,7 @@ fun AllRelayListScreen(
         blockedViewModel.load()
         trustedViewModel.load()
         broadcastViewModel.load()
+        indexerViewModel.load()
     }
 
     MappedAllRelayListView(
@@ -119,6 +125,7 @@ fun AllRelayListScreen(
         blockedViewModel,
         trustedViewModel,
         broadcastViewModel,
+        indexerViewModel,
         accountViewModel,
         nav,
     )
@@ -136,6 +143,7 @@ fun MappedAllRelayListView(
     blockedViewModel: BlockedRelayListViewModel,
     trustedViewModel: TrustedRelayListViewModel,
     broadcastViewModel: BroadcastRelayListViewModel,
+    indexerViewModel: IndexerRelayListViewModel,
     accountViewModel: AccountViewModel,
     newNav: INav,
 ) {
@@ -149,6 +157,7 @@ fun MappedAllRelayListView(
     val localFeedState by localViewModel.relays.collectAsStateWithLifecycle()
     val connectedRelays by connectedViewModel.relays.collectAsStateWithLifecycle()
     val broadcastRelays by broadcastViewModel.relays.collectAsStateWithLifecycle()
+    val indexerRelays by indexerViewModel.relays.collectAsStateWithLifecycle()
 
     Scaffold(
         topBar = {
@@ -163,6 +172,7 @@ fun MappedAllRelayListView(
                     trustedViewModel.clear()
                     blockedViewModel.clear()
                     broadcastViewModel.clear()
+                    indexerViewModel.clear()
                     newNav.popBack()
                 },
                 onPost = {
@@ -174,6 +184,7 @@ fun MappedAllRelayListView(
                     trustedViewModel.create()
                     blockedViewModel.create()
                     broadcastViewModel.create()
+                    indexerViewModel.create()
                     newNav.popBack()
                 },
             )
@@ -240,6 +251,17 @@ fun MappedAllRelayListView(
             }
             renderBroadcastItems(broadcastRelays, broadcastViewModel, accountViewModel, newNav)
 
+            item {
+                SettingsCategoryWithButton(
+                    stringRes(R.string.indexer_section),
+                    stringRes(R.string.indexer_section_explainer),
+                    SettingsCategorySpacingModifier,
+                ) {
+                    ResetIndexerRelays(indexerViewModel)
+                }
+            }
+            renderIndexerItems(indexerRelays, indexerViewModel, accountViewModel, newNav)
+
             item {
                 SettingsCategoryWithButton(
                     stringRes(R.string.search_section),
@@ -307,6 +329,23 @@ fun ResetSearchRelays(postViewModel: SearchRelayListViewModel) {
     }
 }
 
+@Composable
+fun ResetIndexerRelays(postViewModel: IndexerRelayListViewModel) {
+    OutlinedButton(
+        onClick = {
+            postViewModel.deleteAll()
+            DefaultIndexerRelayList.forEach {
+                postViewModel.addRelay(
+                    relaySetupInfoBuilder(it),
+                )
+            }
+            postViewModel.loadRelayDocuments()
+        },
+    ) {
+        Text(stringRes(R.string.default_relays))
+    }
+}
+
 @Composable
 fun ResetDMRelays(postViewModel: DMRelayListViewModel) {
     OutlinedButton(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/relays/indexer/IndexerRelayListView.kt

@@ -0,0 +1,81 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.indexer
+
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListScope
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.navigation.navs.rememberExtendedNav
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.common.BasicRelaySetupInfo
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.common.BasicRelaySetupInfoDialog
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.common.RelayUrlEditField
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.common.relaySetupInfoBuilder
+import com.vitorpamplona.amethyst.ui.theme.FeedPadding
+import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
+
+@Composable
+fun IndexerRelayList(
+    postViewModel: IndexerRelayListViewModel,
+    accountViewModel: AccountViewModel,
+    onClose: () -> Unit,
+    nav: INav,
+) {
+    val feedState by postViewModel.relays.collectAsStateWithLifecycle()
+
+    val newNav = rememberExtendedNav(nav, onClose)
+
+    Row(verticalAlignment = Alignment.CenterVertically) {
+        LazyColumn(
+            contentPadding = FeedPadding,
+        ) {
+            renderIndexerItems(feedState, postViewModel, accountViewModel, newNav)
+        }
+    }
+}
+
+fun LazyListScope.renderIndexerItems(
+    feedState: List<BasicRelaySetupInfo>,
+    postViewModel: IndexerRelayListViewModel,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    itemsIndexed(feedState, key = { _, item -> "Indexer" + item.relay }) { index, item ->
+        BasicRelaySetupInfoDialog(
+            item,
+            onDelete = { postViewModel.deleteRelay(item) },
+            accountViewModel = accountViewModel,
+            nav,
+        )
+    }
+
+    item {
+        Spacer(modifier = StdVertSpacer)
+        RelayUrlEditField { postViewModel.addRelay(relaySetupInfoBuilder(it)) }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/relays/indexer/IndexerRelayListViewModel.kt

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.indexer
+
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.common.BasicRelaySetupInfoModel
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+
+class IndexerRelayListViewModel : BasicRelaySetupInfoModel() {
+    override fun getRelayList(): List<NormalizedRelayUrl>? =
+        account.indexerRelayList.flow.value
+            .toList()
+
+    override suspend fun saveRelayList(urlList: List<NormalizedRelayUrl>) {
+        account.saveIndexerRelayList(urlList)
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/threadview/ThreadFeedView.kt

@@ -122,6 +122,7 @@ import com.vitorpamplona.amethyst.ui.note.types.DisplayBlockedRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayBroadcastRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayDMRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayFollowList
+import com.vitorpamplona.amethyst.ui.note.types.DisplayIndexerRelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayNIP65RelayList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayPeopleList
 import com.vitorpamplona.amethyst.ui.note.types.DisplayRelaySet
@@ -210,6 +211,7 @@ import com.vitorpamplona.quartz.nip51Lists.followList.FollowListEvent
 import com.vitorpamplona.quartz.nip51Lists.peopleList.PeopleListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BroadcastRelayListEvent
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relaySets.RelaySetEvent
 import com.vitorpamplona.quartz.nip53LiveActivities.chat.LiveActivitiesChatMessageEvent
@@ -605,6 +607,8 @@ private fun FullBleedNoteCompose(
                     DisplayBlockedRelayList(baseNote, backgroundColor, accountViewModel, nav)
                 } else if (noteEvent is TrustedRelayListEvent) {
                     DisplayTrustedRelayList(baseNote, backgroundColor, accountViewModel, nav)
+                } else if (noteEvent is IndexerRelayListEvent) {
+                    DisplayIndexerRelayList(baseNote, backgroundColor, accountViewModel, nav)
                 } else if (noteEvent is BroadcastRelayListEvent) {
                     DisplayBroadcastRelayList(baseNote, backgroundColor, accountViewModel, nav)
                 } else if (noteEvent is FhirResourceEvent) {

amethyst/src/main/res/values/strings.xml

@@ -1094,7 +1094,11 @@
 
     <string name="broadcast_relays_title">Broadcast Relays</string>
     <string name="broadcast_section">Broadcast Relays</string>
-    <string name="broadcast_section_explainer">Relays that specialize in pushing your notes to all of the other relays. Amethyst will add this relay to all new events made by you</string>
+    <string name="broadcast_section_explainer">Relays that specialize in pushing your notes to all of the other relays, like sendit.nosflare.com. Amethyst will add this relay to all new events made by you</string>
+
+    <string name="indexer_relays_title">Indexer Relays</string>
+    <string name="indexer_section">Indexer Relays</string>
+    <string name="indexer_section_explainer">Relays that specialize in hosting everyone\'s metadata and relay lists, like purplepag.es. Amethyst will use these relays to find users that are not in your lists.</string>
 
     <string name="blocked_relays_title">Blocked Relays</string>
     <string name="blocked_section">Blocked Relays</string>

quartz/src/main/java/com/vitorpamplona/quartz/EventFactory.kt

@@ -83,6 +83,7 @@ import com.vitorpamplona.quartz.nip51Lists.muteList.MuteListEvent
 import com.vitorpamplona.quartz.nip51Lists.peopleList.PeopleListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BroadcastRelayListEvent
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relaySets.RelaySetEvent
 import com.vitorpamplona.quartz.nip52Calendar.CalendarDateSlotEvent
@@ -233,6 +234,7 @@ class EventFactory {
                 HashtagListEvent.KIND -> HashtagListEvent(id, pubKey, createdAt, tags, content, sig)
                 HighlightEvent.KIND -> HighlightEvent(id, pubKey, createdAt, tags, content, sig)
                 HTTPAuthorizationEvent.KIND -> HTTPAuthorizationEvent(id, pubKey, createdAt, tags, content, sig)
+                IndexerRelayListEvent.KIND -> IndexerRelayListEvent(id, pubKey, createdAt, tags, content, sig)
                 InteractiveStoryPrologueEvent.KIND -> InteractiveStoryPrologueEvent(id, pubKey, createdAt, tags, content, sig)
                 InteractiveStorySceneEvent.KIND -> InteractiveStorySceneEvent(id, pubKey, createdAt, tags, content, sig)
                 InteractiveStoryReadingStateEvent.KIND -> InteractiveStoryReadingStateEvent(id, pubKey, createdAt, tags, content, sig)

quartz/src/main/java/com/vitorpamplona/quartz/nip01Core/signers/NostrSignerSync.kt

@@ -79,6 +79,7 @@ class NostrSignerSync(
         toPublicKey: HexKey,
     ): String {
         if (keyPair.privKey == null) throw SignerExceptions.ReadOnlyException()
+        if (plaintext.isBlank()) return ""
 
         return Nip04.encrypt(
             plaintext,
@@ -102,6 +103,7 @@ class NostrSignerSync(
         toPublicKey: HexKey,
     ): String {
         if (keyPair.privKey == null) throw SignerExceptions.ReadOnlyException()
+        if (plaintext.isBlank()) return ""
 
         return Nip44
             .encrypt(

quartz/src/main/java/com/vitorpamplona/quartz/nip51Lists/relayLists/BroadcastRelayListEvent.kt

@@ -66,7 +66,7 @@ class BroadcastRelayListEvent(
 
         fun createAddressATag(pubKey: HexKey): ATag = ATag(KIND, pubKey, "", null)
 
-        fun createAddressTag(pubKey: HexKey): String = Address.Companion.assemble(KIND, pubKey, "")
+        fun createAddressTag(pubKey: HexKey): String = Address.assemble(KIND, pubKey, "")
 
         suspend fun updateRelayList(
             earlierVersion: BroadcastRelayListEvent,
@@ -75,8 +75,9 @@ class BroadcastRelayListEvent(
             createdAt: Long = TimeUtils.now(),
         ): BroadcastRelayListEvent {
             val newRelayList = relays.map { RelayTag.assemble(it) }
+            println("AABBCC 1 ${earlierVersion.content}")
             val privateTags = earlierVersion.privateTags(signer) ?: throw SignerExceptions.UnauthorizedDecryptionException()
-
+            println("AABBCC 2 ${privateTags.size}")
             val publicTags = earlierVersion.tags.remove(RelayTag::match)
             val newPrivateTags = privateTags.remove(RelayTag::notMatch).plus(newRelayList)
 

quartz/src/main/java/com/vitorpamplona/quartz/nip51Lists/relayLists/IndexerRelayListEvent.kt

@@ -0,0 +1,121 @@
+/**
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.nip51Lists.relayLists
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSignerSync
+import com.vitorpamplona.quartz.nip01Core.signers.SignerExceptions
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip01Core.tags.addressables.ATag
+import com.vitorpamplona.quartz.nip01Core.tags.addressables.Address
+import com.vitorpamplona.quartz.nip31Alts.AltTag
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.nip51Lists.PrivateTagArrayEvent
+import com.vitorpamplona.quartz.nip51Lists.encryption.PrivateTagsInContent
+import com.vitorpamplona.quartz.nip51Lists.encryption.signNip51List
+import com.vitorpamplona.quartz.nip51Lists.relayLists.tags.RelayTag
+import com.vitorpamplona.quartz.nip51Lists.relayLists.tags.indexerRelays
+import com.vitorpamplona.quartz.nip51Lists.relayLists.tags.relays
+import com.vitorpamplona.quartz.nip51Lists.remove
+import com.vitorpamplona.quartz.utils.TimeUtils
+import kotlin.collections.plus
+
+@Immutable
+class IndexerRelayListEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : PrivateTagArrayEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
+    fun publicRelays() = tags.relays()
+
+    suspend fun decryptPrivateRelays(signer: NostrSigner) = privateTags(signer)?.relays()
+
+    suspend fun decryptRelays(signer: NostrSigner): List<NormalizedRelayUrl> = publicRelays() + (decryptPrivateRelays(signer) ?: emptyList())
+
+    companion object {
+        const val KIND = 10087
+        const val ALT = "Broadcasting relays from this author"
+        val TAGS = arrayOf(AltTag.assemble(ALT))
+
+        fun createAddress(pubKey: HexKey): Address = Address(KIND, pubKey, "")
+
+        fun createAddressATag(pubKey: HexKey): ATag = ATag(KIND, pubKey, "", null)
+
+        fun createAddressTag(pubKey: HexKey): String = Address.Companion.assemble(KIND, pubKey, "")
+
+        suspend fun updateRelayList(
+            earlierVersion: IndexerRelayListEvent,
+            relays: List<NormalizedRelayUrl>,
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+        ): IndexerRelayListEvent {
+            val newRelayList = relays.map { RelayTag.assemble(it) }
+            val privateTags = earlierVersion.privateTags(signer) ?: throw SignerExceptions.UnauthorizedDecryptionException()
+
+            val publicTags = earlierVersion.tags.remove(RelayTag::match)
+            val newPrivateTags = privateTags.remove(RelayTag::notMatch).plus(newRelayList)
+
+            return signer.signNip51List(createdAt, KIND, publicTags, newPrivateTags)
+        }
+
+        suspend fun create(
+            relays: List<NormalizedRelayUrl>,
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+        ): IndexerRelayListEvent {
+            val privateTagArray = relays.map { RelayTag.assemble(it) }.toTypedArray()
+            return signer.signNip51List(createdAt, KIND, TAGS, privateTagArray)
+        }
+
+        suspend fun create(
+            relays: List<NormalizedRelayUrl>,
+            signer: NostrSignerSync,
+            createdAt: Long = TimeUtils.now(),
+        ): IndexerRelayListEvent {
+            val privateTagArray = relays.map { RelayTag.assemble(it) }.toTypedArray()
+            return signer.signNip51List(createdAt, KIND, TAGS, privateTagArray)
+        }
+
+        suspend fun build(
+            publicRelays: List<NormalizedRelayUrl> = emptyList(),
+            privateRelays: List<NormalizedRelayUrl> = emptyList(),
+            signer: NostrSigner,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<IndexerRelayListEvent>.() -> Unit = {},
+        ) = eventTemplate<IndexerRelayListEvent>(
+            kind = KIND,
+            description = PrivateTagsInContent.encryptNip44(privateRelays.map { RelayTag.assemble(it) }.toTypedArray(), signer),
+            createdAt = createdAt,
+        ) {
+            alt(ALT)
+            indexerRelays(publicRelays)
+
+            initializer()
+        }
+    }
+}

quartz/src/main/java/com/vitorpamplona/quartz/nip51Lists/relayLists/tags/TagArrayBuilderExt.kt

@@ -27,6 +27,7 @@ import com.vitorpamplona.quartz.nip50Search.SearchRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.PrivateTagArrayEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.BroadcastRelayListEvent
+import com.vitorpamplona.quartz.nip51Lists.relayLists.IndexerRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relaySets.RelaySetEvent
 import com.vitorpamplona.quartz.nip51Lists.tags.NameTag
@@ -42,6 +43,8 @@ fun TagArrayBuilder<TrustedRelayListEvent>.trustedRelays(relays: List<Normalized
 
 fun TagArrayBuilder<BroadcastRelayListEvent>.broadcastRelays(relays: List<NormalizedRelayUrl>) = addAll(relays.map { RelayTag.assemble(it) })
 
+fun TagArrayBuilder<IndexerRelayListEvent>.indexerRelays(relays: List<NormalizedRelayUrl>) = addAll(relays.map { RelayTag.assemble(it) })
+
 fun TagArrayBuilder<PrivateOutboxRelayListEvent>.privateRelays(relays: List<NormalizedRelayUrl>) = addAll(relays.map { RelayTag.assemble(it) })
 
 fun TagArrayBuilder<RelaySetEvent>.relaySet(relays: List<NormalizedRelayUrl>) = addAll(relays.map { RelayTag.assemble(it) })

quartz/src/main/java/com/vitorpamplona/quartz/nip55AndroidSigner/client/NostrSignerExternal.kt

@@ -96,6 +96,8 @@ class NostrSignerExternal(
         plaintext: String,
         toPublicKey: HexKey,
     ): String {
+        if (plaintext.isBlank()) return ""
+
         val result = backgroundQuery.nip04Encrypt(plaintext, toPublicKey) ?: foregroundQuery.nip04Encrypt(plaintext, toPublicKey)
 
         if (result is SignerResult.RequestAddressed.Successful<EncryptionResult>) {
@@ -124,6 +126,8 @@ class NostrSignerExternal(
         plaintext: String,
         toPublicKey: HexKey,
     ): String {
+        if (plaintext.isBlank()) return ""
+
         val result = backgroundQuery.nip44Encrypt(plaintext, toPublicKey) ?: foregroundQuery.nip44Encrypt(plaintext, toPublicKey)
 
         if (result is SignerResult.RequestAddressed.Successful<EncryptionResult>) {