Merge pull request #2010 from vitorpamplona/claude/nip43-relay-members-dWO19

Add NIP-43 relay members support with UI screens

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppNavigation.kt

@@ -110,6 +110,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.relay.RelayFeedScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.AllRelayListScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.RelayInformationScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.eventsync.EventSyncScreen
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.nip43.RelayMembersScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.nip86.RelayManagementScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.vanish.RequestToVanishScreen
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.relays.vanish.VanishEventsScreen
@@ -237,6 +238,7 @@ fun BuildNavigation(
         composableFromEndArgs<Route.ChessGame> { ChessGameScreen(it.gameId, accountViewModel, nav) }
         composableFromEndArgs<Route.RelayInfo> { RelayInformationScreen(it.url, accountViewModel, nav) }
         composableFromEndArgs<Route.RelayManagement> { RelayManagementScreen(it.url, accountViewModel, nav) }
+        composableFromEndArgs<Route.RelayMembers> { RelayMembersScreen(it.url, accountViewModel, nav) }
         composableFromEndArgs<Route.Community> { CommunityScreen(Address(it.kind, it.pubKeyHex, it.dTag), accountViewModel, nav) }
         composableFromEndArgs<Route.FollowPack> { FollowPackFeedScreen(Address(it.kind, it.pubKeyHex, it.dTag), accountViewModel, nav) }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/navigation/routes/Routes.kt

@@ -230,6 +230,10 @@ sealed class Route {
         val url: String,
     ) : Route()
 
+    @Serializable data class RelayMembers(
+        val url: String,
+    ) : Route()
+
     @Serializable data class RelayFeed(
         val url: String,
     ) : Route()

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

@@ -144,7 +144,12 @@ import com.vitorpamplona.amethyst.ui.note.types.RenderPostApproval
 import com.vitorpamplona.amethyst.ui.note.types.RenderPrivateMessage
 import com.vitorpamplona.amethyst.ui.note.types.RenderPublicMessage
 import com.vitorpamplona.amethyst.ui.note.types.RenderReaction
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayAddMember
 import com.vitorpamplona.amethyst.ui.note.types.RenderRelayDiscovery
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayJoinRequest
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayLeaveRequest
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayMembershipList
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayRemoveMember
 import com.vitorpamplona.amethyst.ui.note.types.RenderReport
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextModificationEvent
@@ -220,6 +225,11 @@ import com.vitorpamplona.quartz.nip35Torrents.TorrentCommentEvent
 import com.vitorpamplona.quartz.nip35Torrents.TorrentEvent
 import com.vitorpamplona.quartz.nip37Drafts.DraftWrapEvent
 import com.vitorpamplona.quartz.nip40Expiration.expiration
+import com.vitorpamplona.quartz.nip43RelayMembers.addMember.RelayAddMemberEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.joinRequest.RelayJoinRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.leaveRequest.RelayLeaveRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.list.RelayMembershipListEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.removeMember.RelayRemoveMemberEvent
 import com.vitorpamplona.quartz.nip50Search.SearchRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.PinListEvent
 import com.vitorpamplona.quartz.nip51Lists.followList.FollowListEvent
@@ -917,6 +927,26 @@ private fun RenderNoteRow(
             RenderRelayDiscovery(baseNote, accountViewModel, nav)
         }
 
+        is RelayMembershipListEvent -> {
+            RenderRelayMembershipList(baseNote, accountViewModel, nav)
+        }
+
+        is RelayAddMemberEvent -> {
+            RenderRelayAddMember(baseNote, accountViewModel, nav)
+        }
+
+        is RelayRemoveMemberEvent -> {
+            RenderRelayRemoveMember(baseNote, accountViewModel, nav)
+        }
+
+        is RelayJoinRequestEvent -> {
+            RenderRelayJoinRequest(baseNote, accountViewModel, nav)
+        }
+
+        is RelayLeaveRequestEvent -> {
+            RenderRelayLeaveRequest(baseNote, accountViewModel, nav)
+        }
+
         is PinListEvent -> {
             RenderPinListEvent(baseNote, backgroundColor, accountViewModel, nav)
         }

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

@@ -0,0 +1,251 @@
+/*
+ * 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.note.types
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ExitToApp
+import androidx.compose.material.icons.filled.People
+import androidx.compose.material.icons.filled.PersonAdd
+import androidx.compose.material.icons.filled.PersonRemove
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
+import com.vitorpamplona.quartz.nip43RelayMembers.addMember.RelayAddMemberEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.list.RelayMembershipListEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.removeMember.RelayRemoveMemberEvent
+
+@Composable
+fun RenderRelayMembershipList(
+    baseNote: Note,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val noteEvent = baseNote.event as? RelayMembershipListEvent ?: return
+    val memberCount = remember(noteEvent) { noteEvent.members().size }
+
+    RelayMemberEventCard(
+        icon = Icons.Default.People,
+        title = stringRes(R.string.relay_membership_list),
+        subtitle = stringRes(R.string.relay_members_count, memberCount),
+        nav = nav,
+        relayPubKey = noteEvent.pubKey,
+    )
+}
+
+@Composable
+fun RenderRelayAddMember(
+    baseNote: Note,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val noteEvent = baseNote.event as? RelayAddMemberEvent ?: return
+    val memberKeys = remember(noteEvent) { noteEvent.memberPubKeys() }
+    val title =
+        if (memberKeys.size == 1) {
+            stringRes(R.string.relay_member_added)
+        } else {
+            stringRes(R.string.relay_members_added, memberKeys.size)
+        }
+    val subtitle = remember(memberKeys) { memberKeys.joinToString(", ") { it.take(16) + "..." } }
+
+    RelayMemberEventCard(
+        icon = Icons.Default.PersonAdd,
+        title = title,
+        subtitle = subtitle,
+        relayPubKey = noteEvent.pubKey,
+    )
+}
+
+@Composable
+fun RenderRelayRemoveMember(
+    baseNote: Note,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val noteEvent = baseNote.event as? RelayRemoveMemberEvent ?: return
+    val memberKeys = remember(noteEvent) { noteEvent.memberPubKeys() }
+    val title =
+        if (memberKeys.size == 1) {
+            stringRes(R.string.relay_member_removed)
+        } else {
+            stringRes(R.string.relay_members_removed, memberKeys.size)
+        }
+    val subtitle = remember(memberKeys) { memberKeys.joinToString(", ") { it.take(16) + "..." } }
+
+    RelayMemberEventCard(
+        icon = Icons.Default.PersonRemove,
+        title = title,
+        subtitle = subtitle,
+        relayPubKey = noteEvent.pubKey,
+    )
+}
+
+@Composable
+fun RenderRelayJoinRequest(
+    baseNote: Note,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    RelayMemberEventCard(
+        icon = Icons.Default.PersonAdd,
+        title = stringRes(R.string.relay_join_request),
+        subtitle = null,
+        nav = nav,
+        relayPubKey = null,
+    )
+}
+
+@Composable
+fun RenderRelayLeaveRequest(
+    baseNote: Note,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    RelayMemberEventCard(
+        icon = Icons.AutoMirrored.Filled.ExitToApp,
+        title = stringRes(R.string.relay_leave_request),
+        subtitle = null,
+        nav = nav,
+        relayPubKey = null,
+    )
+}
+
+@Composable
+private fun RelayMemberEventCard(
+    icon: ImageVector,
+    title: String,
+    subtitle: String?,
+    nav: INav? = null,
+    relayPubKey: String? = null,
+) {
+    Column(
+        modifier =
+            Modifier
+                .fillMaxWidth()
+                .padding(8.dp),
+    ) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Icon(
+                imageVector = icon,
+                contentDescription = null,
+                modifier = Modifier.size(24.dp),
+                tint = MaterialTheme.colorScheme.primary,
+            )
+            Column {
+                Text(
+                    text = title,
+                    fontWeight = FontWeight.Bold,
+                    style = MaterialTheme.typography.bodyLarge,
+                )
+                subtitle?.let {
+                    Text(
+                        text = it,
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+private fun RelayMembershipListCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.People,
+            title = "Relay membership list",
+            subtitle = "42 members",
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayAddMemberCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.PersonAdd,
+            title = "Member added to relay",
+            subtitle = "a1b2c3d4e5f6a7b8...",
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayRemoveMemberCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.PersonRemove,
+            title = "Member removed from relay",
+            subtitle = "a1b2c3d4e5f6a7b8...",
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayJoinRequestCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.PersonAdd,
+            title = "Relay join request",
+            subtitle = null,
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayLeaveRequestCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.AutoMirrored.Filled.ExitToApp,
+            title = "Relay leave request",
+            subtitle = null,
+        )
+    }
+}

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

@@ -63,6 +63,7 @@ import androidx.compose.material.icons.filled.Key
 import androidx.compose.material.icons.filled.Language
 import androidx.compose.material.icons.filled.Lock
 import androidx.compose.material.icons.filled.Payment
+import androidx.compose.material.icons.filled.People
 import androidx.compose.material.icons.filled.PrivacyTip
 import androidx.compose.material.icons.filled.Settings
 import androidx.compose.material.icons.filled.Storage
@@ -1143,6 +1144,21 @@ private fun RelayHeader(
                 Text(text = stringRes(R.string.see_relay_feed))
             }
 
+            if (supportsNip43(relayInfo.supported_nips)) {
+                OutlinedButton(
+                    onClick = { nav.nav(Route.RelayMembers(relay.url)) },
+                    shape = ButtonBorder,
+                ) {
+                    Icon(
+                        Icons.Default.People,
+                        contentDescription = stringRes(R.string.relay_members),
+                        modifier = Modifier.size(18.dp),
+                    )
+                    Spacer(modifier = Modifier.width(4.dp))
+                    Text(text = stringRes(R.string.relay_members))
+                }
+            }
+
             if (Nip86Client.supportsNip86(relayInfo.supported_nips)) {
                 OutlinedButton(
                     onClick = { nav.nav(Route.RelayManagement(relay.url)) },
@@ -1159,6 +1175,8 @@ private fun RelayHeader(
     }
 }
 
+fun supportsNip43(supportedNips: List<String>?): Boolean = supportedNips?.any { it == "43" } == true
+
 @Composable
 fun FeesCard(
     fees: Nip11RelayInformation.RelayInformationFees,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/relays/nip43/RelayMembersScreen.kt

@@ -0,0 +1,384 @@
+/*
+ * 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.nip43
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.consumeWindowInsets
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.ExitToApp
+import androidx.compose.material.icons.filled.CheckCircle
+import androidx.compose.material.icons.filled.People
+import androidx.compose.material.icons.filled.PersonAdd
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.navigation.navs.INav
+import com.vitorpamplona.amethyst.ui.note.UserCompose
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.relay.client.reqs.fetchAsFlow
+import com.vitorpamplona.quartz.nip01Core.relay.filters.Filter
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.RelayUrlNormalizer
+import com.vitorpamplona.quartz.nip01Core.relay.normalizer.displayUrl
+import com.vitorpamplona.quartz.nip43RelayMembers.joinRequest.RelayJoinRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.leaveRequest.RelayLeaveRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.list.RelayMembershipListEvent
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.lastOrNull
+import kotlinx.coroutines.launch
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun RelayMembersScreen(
+    relayUrl: String,
+    accountViewModel: AccountViewModel,
+    nav: INav,
+) {
+    val normalizedRelayUrl = remember(relayUrl) { RelayUrlNormalizer.normalizeOrNull(relayUrl) }
+    if (normalizedRelayUrl == null) return
+
+    var members by remember { mutableStateOf<List<HexKey>>(emptyList()) }
+    var isLoading by remember { mutableStateOf(true) }
+    var isMember by remember { mutableStateOf(false) }
+    var joinRequestSent by remember { mutableStateOf(false) }
+    var leaveRequestSent by remember { mutableStateOf(false) }
+    val scope = rememberCoroutineScope()
+
+    LaunchedEffect(normalizedRelayUrl) {
+        launch(Dispatchers.IO) {
+            val filter =
+                Filter(
+                    kinds = listOf(RelayMembershipListEvent.KIND),
+                    limit = 1,
+                )
+
+            val events =
+                accountViewModel.account.client
+                    .fetchAsFlow(normalizedRelayUrl, filter)
+                    .lastOrNull()
+
+            val membershipEvent =
+                events
+                    ?.mapNotNull { it as? RelayMembershipListEvent }
+                    ?.maxByOrNull { it.createdAt }
+
+            val memberList = membershipEvent?.members() ?: emptyList()
+            members = memberList
+            isMember = memberList.contains(accountViewModel.account.signer.pubKey)
+            isLoading = false
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Text(
+                        text = stringRes(R.string.relay_members_title, normalizedRelayUrl.displayUrl()),
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis,
+                    )
+                },
+                navigationIcon = {
+                    IconButton(onClick = { nav.popBack() }) {
+                        Icon(
+                            imageVector = Icons.AutoMirrored.Filled.ArrowBack,
+                            contentDescription = null,
+                        )
+                    }
+                },
+            )
+        },
+    ) { padding ->
+        Column(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .padding(padding)
+                    .consumeWindowInsets(padding),
+        ) {
+            MembershipActions(
+                isMember = isMember,
+                isLoading = isLoading,
+                joinRequestSent = joinRequestSent,
+                leaveRequestSent = leaveRequestSent,
+                onJoinRequest = {
+                    scope.launch(Dispatchers.IO) {
+                        sendJoinRequest(normalizedRelayUrl, accountViewModel)
+                        joinRequestSent = true
+                    }
+                },
+                onLeaveRequest = {
+                    scope.launch(Dispatchers.IO) {
+                        sendLeaveRequest(normalizedRelayUrl, accountViewModel)
+                        leaveRequestSent = true
+                    }
+                },
+            )
+
+            HorizontalDivider()
+
+            if (isLoading) {
+                Column(
+                    modifier = Modifier.fillMaxSize(),
+                    verticalArrangement = Arrangement.Center,
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                ) {
+                    CircularProgressIndicator()
+                    Spacer(modifier = Modifier.height(8.dp))
+                    Text(text = stringRes(R.string.relay_members_loading))
+                }
+            } else if (members.isEmpty()) {
+                Column(
+                    modifier = Modifier.fillMaxSize(),
+                    verticalArrangement = Arrangement.Center,
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                ) {
+                    Icon(
+                        imageVector = Icons.Default.People,
+                        contentDescription = null,
+                        modifier = Modifier.size(48.dp),
+                        tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    Spacer(modifier = Modifier.height(8.dp))
+                    Text(
+                        text = stringRes(R.string.relay_members_empty),
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                }
+            } else {
+                Text(
+                    text = stringRes(R.string.relay_members_count, members.size),
+                    modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+
+                LazyColumn(modifier = Modifier.fillMaxSize()) {
+                    items(members, key = { it }) { memberPubKey ->
+                        val user = remember(memberPubKey) { accountViewModel.account.cache.getOrCreateUser(memberPubKey) }
+                        UserCompose(
+                            baseUser = user,
+                            accountViewModel = accountViewModel,
+                            nav = nav,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun MembershipActions(
+    isMember: Boolean,
+    isLoading: Boolean,
+    joinRequestSent: Boolean,
+    leaveRequestSent: Boolean,
+    onJoinRequest: () -> Unit,
+    onLeaveRequest: () -> Unit,
+) {
+    Row(
+        modifier =
+            Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+        horizontalArrangement = Arrangement.Center,
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        if (isLoading) return@Row
+
+        if (isMember) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(
+                    imageVector = Icons.Default.CheckCircle,
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.primary,
+                    modifier = Modifier.size(20.dp),
+                )
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(
+                    text = stringRes(R.string.relay_members_you_are_member),
+                    fontWeight = FontWeight.Bold,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+            }
+
+            Spacer(modifier = Modifier.width(16.dp))
+
+            if (leaveRequestSent) {
+                Text(
+                    text = stringRes(R.string.relay_members_leave_sent),
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            } else {
+                OutlinedButton(
+                    onClick = onLeaveRequest,
+                    colors = ButtonDefaults.outlinedButtonColors(contentColor = MaterialTheme.colorScheme.error),
+                ) {
+                    Icon(
+                        imageVector = Icons.AutoMirrored.Filled.ExitToApp,
+                        contentDescription = null,
+                        modifier = Modifier.size(18.dp),
+                    )
+                    Spacer(modifier = Modifier.width(4.dp))
+                    Text(text = stringRes(R.string.relay_members_request_leave))
+                }
+            }
+        } else {
+            if (joinRequestSent) {
+                Text(
+                    text = stringRes(R.string.relay_members_join_sent),
+                    color = MaterialTheme.colorScheme.primary,
+                    fontWeight = FontWeight.Bold,
+                )
+            } else {
+                Button(onClick = onJoinRequest) {
+                    Icon(
+                        imageVector = Icons.Default.PersonAdd,
+                        contentDescription = null,
+                        modifier = Modifier.size(18.dp),
+                    )
+                    Spacer(modifier = Modifier.width(4.dp))
+                    Text(text = stringRes(R.string.relay_members_request_join))
+                }
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+private fun MembershipActionsNotMemberPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = false,
+            isLoading = false,
+            joinRequestSent = false,
+            leaveRequestSent = false,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun MembershipActionsIsMemberPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = true,
+            isLoading = false,
+            joinRequestSent = false,
+            leaveRequestSent = false,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun MembershipActionsJoinSentPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = false,
+            isLoading = false,
+            joinRequestSent = true,
+            leaveRequestSent = false,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun MembershipActionsLeaveSentPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = true,
+            isLoading = false,
+            joinRequestSent = false,
+            leaveRequestSent = true,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
+suspend fun sendJoinRequest(
+    relay: NormalizedRelayUrl,
+    accountViewModel: AccountViewModel,
+) {
+    val template = RelayJoinRequestEvent.build()
+    val signedEvent = accountViewModel.account.signer.sign(template)
+    accountViewModel.account.cache.justConsumeMyOwnEvent(signedEvent)
+    accountViewModel.account.client.publish(signedEvent, setOf(relay))
+}
+
+suspend fun sendLeaveRequest(
+    relay: NormalizedRelayUrl,
+    accountViewModel: AccountViewModel,
+) {
+    val template = RelayLeaveRequestEvent.build()
+    val signedEvent = accountViewModel.account.signer.sign(template)
+    accountViewModel.account.cache.justConsumeMyOwnEvent(signedEvent)
+    accountViewModel.account.client.publish(signedEvent, setOf(relay))
+}

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

@@ -165,7 +165,12 @@ import com.vitorpamplona.amethyst.ui.note.types.RenderPoll
 import com.vitorpamplona.amethyst.ui.note.types.RenderPostApproval
 import com.vitorpamplona.amethyst.ui.note.types.RenderPrivateMessage
 import com.vitorpamplona.amethyst.ui.note.types.RenderPublicMessage
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayAddMember
 import com.vitorpamplona.amethyst.ui.note.types.RenderRelayDiscovery
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayJoinRequest
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayLeaveRequest
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayMembershipList
+import com.vitorpamplona.amethyst.ui.note.types.RenderRelayRemoveMember
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderTextModificationEvent
 import com.vitorpamplona.amethyst.ui.note.types.RenderTorrent
@@ -231,6 +236,11 @@ import com.vitorpamplona.quartz.nip34Git.repository.GitRepositoryEvent
 import com.vitorpamplona.quartz.nip35Torrents.TorrentCommentEvent
 import com.vitorpamplona.quartz.nip35Torrents.TorrentEvent
 import com.vitorpamplona.quartz.nip37Drafts.DraftWrapEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.addMember.RelayAddMemberEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.joinRequest.RelayJoinRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.leaveRequest.RelayLeaveRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.list.RelayMembershipListEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.removeMember.RelayRemoveMemberEvent
 import com.vitorpamplona.quartz.nip50Search.SearchRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.PinListEvent
 import com.vitorpamplona.quartz.nip51Lists.followList.FollowListEvent
@@ -712,6 +722,16 @@ private fun FullBleedNoteCompose(
                     RenderRepost(baseNote, quotesLeft = 3, backgroundColor, accountViewModel, nav)
                 } else if (noteEvent is RelayDiscoveryEvent) {
                     RenderRelayDiscovery(baseNote, accountViewModel, nav)
+                } else if (noteEvent is RelayMembershipListEvent) {
+                    RenderRelayMembershipList(baseNote, accountViewModel, nav)
+                } else if (noteEvent is RelayAddMemberEvent) {
+                    RenderRelayAddMember(baseNote, accountViewModel, nav)
+                } else if (noteEvent is RelayRemoveMemberEvent) {
+                    RenderRelayRemoveMember(baseNote, accountViewModel, nav)
+                } else if (noteEvent is RelayJoinRequestEvent) {
+                    RenderRelayJoinRequest(baseNote, accountViewModel, nav)
+                } else if (noteEvent is RelayLeaveRequestEvent) {
+                    RenderRelayLeaveRequest(baseNote, accountViewModel, nav)
                 } else if (noteEvent is TextNoteModificationEvent) {
                     RenderTextModificationEvent(
                         note = baseNote,

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

@@ -2084,4 +2084,21 @@
     <string name="relay_management_relay_icon_url">Relay Icon URL</string>
     <string name="relay_management_button">Manage Relay</string>
     <string name="manage">Manage</string>
+    <string name="relay_members">Members</string>
+    <string name="relay_members_title">Members of %1$s</string>
+    <string name="relay_members_count">%1$d members</string>
+    <string name="relay_members_loading">Loading members…</string>
+    <string name="relay_members_empty">No members found</string>
+    <string name="relay_members_request_join">Request to Join</string>
+    <string name="relay_members_request_leave">Request to Leave</string>
+    <string name="relay_members_join_sent">Join request sent</string>
+    <string name="relay_members_leave_sent">Leave request sent</string>
+    <string name="relay_members_you_are_member">You are a member</string>
+    <string name="relay_membership_list">Relay membership list</string>
+    <string name="relay_member_added">Member added to relay</string>
+    <string name="relay_members_added">%1$d members added to relay</string>
+    <string name="relay_member_removed">Member removed from relay</string>
+    <string name="relay_members_removed">%1$d members removed from relay</string>
+    <string name="relay_join_request">Relay join request</string>
+    <string name="relay_leave_request">Relay leave request</string>
 </resources>

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/addMember/RelayAddMemberEvent.kt

@@ -0,0 +1,59 @@
+/*
+ * 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.nip43RelayMembers.addMember
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip01Core.tags.people.PTag
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.nip70ProtectedEvts.protect
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class RelayAddMemberEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
+    fun memberPubKeys() = tags.mapNotNull(PTag::parseKey)
+
+    companion object {
+        const val KIND = 8000
+        const val ALT_DESCRIPTION = "Relay member added"
+
+        fun build(
+            memberPubKeys: List<HexKey>,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<RelayAddMemberEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, "", createdAt) {
+            alt(ALT_DESCRIPTION)
+            protect()
+            memberPubKeys.forEach { add(PTag.assemble(it, null)) }
+            initializer()
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/inviteRequest/RelayInviteRequestEvent.kt

@@ -0,0 +1,52 @@
+/*
+ * 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.nip43RelayMembers.inviteRequest
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class RelayInviteRequestEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
+    companion object {
+        const val KIND = 28935
+        const val ALT_DESCRIPTION = "Relay invite request"
+
+        fun build(
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<RelayInviteRequestEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, "", createdAt) {
+            alt(ALT_DESCRIPTION)
+            initializer()
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/joinRequest/RelayJoinRequestEvent.kt

@@ -0,0 +1,56 @@
+/*
+ * 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.nip43RelayMembers.joinRequest
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class RelayJoinRequestEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
+    fun claim() = tags.claim()
+
+    companion object {
+        const val KIND = 28934
+        const val ALT_DESCRIPTION = "Relay join request"
+
+        fun build(
+            claim: String? = null,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<RelayJoinRequestEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, "", createdAt) {
+            alt(ALT_DESCRIPTION)
+            claim?.let { claim(it) }
+            initializer()
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/joinRequest/TagArrayBuilderExt.kt

@@ -0,0 +1,26 @@
+/*
+ * 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.nip43RelayMembers.joinRequest
+
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip43RelayMembers.joinRequest.tags.ClaimTag
+
+fun TagArrayBuilder<RelayJoinRequestEvent>.claim(claim: String) = addUnique(ClaimTag.assemble(claim))

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/joinRequest/TagArrayExt.kt

@@ -0,0 +1,26 @@
+/*
+ * 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.nip43RelayMembers.joinRequest
+
+import com.vitorpamplona.quartz.nip01Core.core.TagArray
+import com.vitorpamplona.quartz.nip43RelayMembers.joinRequest.tags.ClaimTag
+
+fun TagArray.claim() = firstNotNullOfOrNull(ClaimTag::parse)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/joinRequest/tags/ClaimTag.kt

@@ -0,0 +1,39 @@
+/*
+ * 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.nip43RelayMembers.joinRequest.tags
+
+import com.vitorpamplona.quartz.nip01Core.core.has
+import com.vitorpamplona.quartz.utils.ensure
+
+class ClaimTag {
+    companion object {
+        const val TAG_NAME = "claim"
+
+        fun parse(tag: Array<String>): String? {
+            ensure(tag.has(1)) { return null }
+            ensure(tag[0] == TAG_NAME) { return null }
+            ensure(tag[1].isNotEmpty()) { return null }
+            return tag[1]
+        }
+
+        fun assemble(claim: String) = arrayOf(TAG_NAME, claim)
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/leaveRequest/RelayLeaveRequestEvent.kt

@@ -0,0 +1,54 @@
+/*
+ * 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.nip43RelayMembers.leaveRequest
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.nip70ProtectedEvts.protect
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class RelayLeaveRequestEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
+    companion object {
+        const val KIND = 28936
+        const val ALT_DESCRIPTION = "Relay leave request"
+
+        fun build(
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<RelayLeaveRequestEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, "", createdAt) {
+            alt(ALT_DESCRIPTION)
+            protect()
+            initializer()
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/list/RelayMembershipListEvent.kt

@@ -0,0 +1,58 @@
+/*
+ * 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.nip43RelayMembers.list
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.nip70ProtectedEvts.protect
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class RelayMembershipListEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
+    fun members() = tags.members()
+
+    companion object {
+        const val KIND = 13534
+        const val ALT_DESCRIPTION = "Relay membership list"
+
+        fun build(
+            members: List<HexKey>,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<RelayMembershipListEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, "", createdAt) {
+            alt(ALT_DESCRIPTION)
+            protect()
+            members(members)
+            initializer()
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/list/TagArrayBuilderExt.kt

@@ -0,0 +1,27 @@
+/*
+ * 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.nip43RelayMembers.list
+
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip43RelayMembers.list.tags.MemberTag
+
+fun TagArrayBuilder<RelayMembershipListEvent>.members(pubKeys: List<HexKey>) = addAll(MemberTag.assemble(pubKeys))

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/list/TagArrayExt.kt

@@ -0,0 +1,26 @@
+/*
+ * 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.nip43RelayMembers.list
+
+import com.vitorpamplona.quartz.nip01Core.core.TagArray
+import com.vitorpamplona.quartz.nip43RelayMembers.list.tags.MemberTag
+
+fun TagArray.members() = mapNotNull(MemberTag::parse)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/list/tags/MemberTag.kt

@@ -0,0 +1,42 @@
+/*
+ * 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.nip43RelayMembers.list.tags
+
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.has
+import com.vitorpamplona.quartz.utils.ensure
+
+class MemberTag {
+    companion object {
+        const val TAG_NAME = "member"
+
+        fun parse(tag: Array<String>): HexKey? {
+            ensure(tag.has(1)) { return null }
+            ensure(tag[0] == TAG_NAME) { return null }
+            ensure(tag[1].length == 64) { return null }
+            return tag[1]
+        }
+
+        fun assemble(pubKey: HexKey) = arrayOf(TAG_NAME, pubKey)
+
+        fun assemble(pubKeys: List<HexKey>) = pubKeys.map { assemble(it) }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip43RelayMembers/removeMember/RelayRemoveMemberEvent.kt

@@ -0,0 +1,59 @@
+/*
+ * 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.nip43RelayMembers.removeMember
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.Event
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip01Core.tags.people.PTag
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.nip70ProtectedEvts.protect
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class RelayRemoveMemberEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : Event(id, pubKey, createdAt, KIND, tags, content, sig) {
+    fun memberPubKeys() = tags.mapNotNull(PTag::parseKey)
+
+    companion object {
+        const val KIND = 8001
+        const val ALT_DESCRIPTION = "Relay member removed"
+
+        fun build(
+            memberPubKeys: List<HexKey>,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<RelayRemoveMemberEvent>.() -> Unit = {},
+        ) = eventTemplate(KIND, "", createdAt) {
+            alt(ALT_DESCRIPTION)
+            protect()
+            memberPubKeys.forEach { add(PTag.assemble(it, null)) }
+            initializer()
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/utils/EventFactory.kt

@@ -79,6 +79,12 @@ import com.vitorpamplona.quartz.nip37Drafts.privateOutbox.PrivateOutboxRelayList
 import com.vitorpamplona.quartz.nip38UserStatus.StatusEvent
 import com.vitorpamplona.quartz.nip39ExtIdentities.ExternalIdentitiesEvent
 import com.vitorpamplona.quartz.nip42RelayAuth.RelayAuthEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.addMember.RelayAddMemberEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.inviteRequest.RelayInviteRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.joinRequest.RelayJoinRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.leaveRequest.RelayLeaveRequestEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.list.RelayMembershipListEvent
+import com.vitorpamplona.quartz.nip43RelayMembers.removeMember.RelayRemoveMemberEvent
 import com.vitorpamplona.quartz.nip46RemoteSigner.NostrConnectEvent
 import com.vitorpamplona.quartz.nip47WalletConnect.events.LnZapPaymentRequestEvent
 import com.vitorpamplona.quartz.nip47WalletConnect.events.LnZapPaymentResponseEvent
@@ -325,6 +331,12 @@ class EventFactory {
                 EventAssertionEvent.KIND -> EventAssertionEvent(id, pubKey, createdAt, tags, content, sig)
                 AddressableAssertionEvent.KIND -> AddressableAssertionEvent(id, pubKey, createdAt, tags, content, sig)
                 ExternalIdAssertionEvent.KIND -> ExternalIdAssertionEvent(id, pubKey, createdAt, tags, content, sig)
+                RelayAddMemberEvent.KIND -> RelayAddMemberEvent(id, pubKey, createdAt, tags, content, sig)
+                RelayRemoveMemberEvent.KIND -> RelayRemoveMemberEvent(id, pubKey, createdAt, tags, content, sig)
+                RelayMembershipListEvent.KIND -> RelayMembershipListEvent(id, pubKey, createdAt, tags, content, sig)
+                RelayJoinRequestEvent.KIND -> RelayJoinRequestEvent(id, pubKey, createdAt, tags, content, sig)
+                RelayInviteRequestEvent.KIND -> RelayInviteRequestEvent(id, pubKey, createdAt, tags, content, sig)
+                RelayLeaveRequestEvent.KIND -> RelayLeaveRequestEvent(id, pubKey, createdAt, tags, content, sig)
                 RelayAuthEvent.KIND -> RelayAuthEvent(id, pubKey, createdAt, tags, content, sig)
                 RelayDiscoveryEvent.KIND -> RelayDiscoveryEvent(id, pubKey, createdAt, tags, content, sig)
                 RelayMonitorEvent.KIND -> RelayMonitorEvent(id, pubKey, createdAt, tags, content, sig)