feat: add NIP-39 kind 10011 (ExternalIdentitiesEvent) support

- Add ExternalIdentitiesEvent (kind 10011) to quartz/nip39ExtIdentities
  with createNew/updateFromPast factory methods and identityClaims()
- Generalize TagArrayBuilderExt to work with any Event type (not just
  MetadataEvent) so claims/twitterClaim etc. work with both kinds
- Extract replaceClaims logic to List<IdentityClaimTag>.replaceClaims()
  shared extension used by both MetadataEvent and ExternalIdentitiesEvent
- Register ExternalIdentitiesEvent in EventFactory (kind 10011)
- Add consume(ExternalIdentitiesEvent) to LocalCache and dispatch in
  justConsumeInnerInner
- Add ExternalIdentitiesEvent.KIND to UserMetadataForKeyKinds relay filter
  so kind 10011 is fetched alongside kind 0 when loading user profiles
- Add UserExternalIdentitiesViewModel that observes the kind 10011
  AddressableNote for a user and exposes List<IdentityClaimTag> as a Flow
- Thread UserExternalIdentitiesViewModel through ProfileScreen →
  RenderScreen → ProfileHeader → DrawAdditionalInfo
- DrawAdditionalInfo now shows kind 10011 identities, falling back to
  kind 0 for backwards compatibility
- UserMetadataState: add sendNewUserIdentities() for kind 10011 and
  remove identity claim params from sendNewUserMetadata() (kind 0)
- NewUserMetadataViewModel: load identities from kind 10011 first
  (fallback to kind 0), save identities to kind 10011 separately

https://claude.ai/code/session_017iU6ZdRu5qRXPCeDztVeeV

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

@@ -132,6 +132,7 @@ import com.vitorpamplona.quartz.nip35Torrents.TorrentEvent
 import com.vitorpamplona.quartz.nip37Drafts.DraftWrapEvent
 import com.vitorpamplona.quartz.nip37Drafts.privateOutbox.PrivateOutboxRelayListEvent
 import com.vitorpamplona.quartz.nip38UserStatus.StatusEvent
+import com.vitorpamplona.quartz.nip39ExtIdentities.ExternalIdentitiesEvent
 import com.vitorpamplona.quartz.nip40Expiration.isExpirationBefore
 import com.vitorpamplona.quartz.nip40Expiration.isExpired
 import com.vitorpamplona.quartz.nip47WalletConnect.LnZapPaymentRequestEvent
@@ -560,6 +561,12 @@ object LocalCache : ILocalCache, ICacheProvider {
         return false
     }
 
+    fun consume(
+        event: ExternalIdentitiesEvent,
+        relay: NormalizedRelayUrl?,
+        wasVerified: Boolean,
+    ) = consumeBaseReplaceable(event, relay, wasVerified)
+
     fun consume(
         event: ContactListEvent,
         relay: NormalizedRelayUrl?,
@@ -3050,6 +3057,7 @@ object LocalCache : ILocalCache, ICacheProvider {
                 is EmojiPackSelectionEvent -> consume(event, relay, wasVerified)
                 is EphemeralChatEvent -> consume(event, relay, wasVerified)
                 is EphemeralChatListEvent -> consume(event, relay, wasVerified)
+                is ExternalIdentitiesEvent -> consume(event, relay, wasVerified)
                 is GenericRepostEvent -> consume(event, relay, wasVerified)
                 is FhirResourceEvent -> consume(event, relay, wasVerified)
                 is FileHeaderEvent -> consume(event, relay, wasVerified)

amethyst/src/main/java/com/vitorpamplona/amethyst/model/nip01UserMetadata/UserMetadataState.kt

@@ -24,6 +24,7 @@ import com.vitorpamplona.amethyst.model.AccountSettings
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
 import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import com.vitorpamplona.quartz.nip39ExtIdentities.ExternalIdentitiesEvent
 import com.vitorpamplona.quartz.utils.Log
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.DelicateCoroutinesApi
@@ -51,6 +52,12 @@ class UserMetadataState(
 
     fun getUserMetadataEvent(): MetadataEvent? = note.event as? MetadataEvent
 
+    fun getIdentitiesEventAddress() = ExternalIdentitiesEvent.createAddress(signer.pubKey)
+
+    val identitiesNote = cache.getOrCreateAddressableNote(getIdentitiesEventAddress())
+
+    fun getExternalIdentitiesEvent(): ExternalIdentitiesEvent? = identitiesNote.event as? ExternalIdentitiesEvent
+
     suspend fun sendNewUserMetadata(
         name: String? = null,
         displayName: String? = null,
@@ -62,9 +69,6 @@ class UserMetadataState(
         nip05: String? = null,
         lnAddress: String? = null,
         lnURL: String? = null,
-        twitter: String? = null,
-        mastodon: String? = null,
-        github: String? = null,
     ): MetadataEvent {
         val latest = getUserMetadataEvent()
 
@@ -82,9 +86,6 @@ class UserMetadataState(
                     nip05 = nip05,
                     lnAddress = lnAddress,
                     lnURL = lnURL,
-                    twitter = twitter,
-                    mastodon = mastodon,
-                    github = github,
                 )
             } else {
                 MetadataEvent.createNew(
@@ -98,6 +99,29 @@ class UserMetadataState(
                     nip05 = nip05,
                     lnAddress = lnAddress,
                     lnURL = lnURL,
+                )
+            }
+
+        return signer.sign(template)
+    }
+
+    suspend fun sendNewUserIdentities(
+        twitter: String? = null,
+        mastodon: String? = null,
+        github: String? = null,
+    ): ExternalIdentitiesEvent {
+        val latest = getExternalIdentitiesEvent()
+
+        val template =
+            if (latest != null) {
+                ExternalIdentitiesEvent.updateFromPast(
+                    latest = latest,
+                    twitter = twitter,
+                    mastodon = mastodon,
+                    github = github,
+                )
+            } else {
+                ExternalIdentitiesEvent.createNew(
                     twitter = twitter,
                     mastodon = mastodon,
                     github = github,

amethyst/src/main/java/com/vitorpamplona/amethyst/service/relayClient/reqCommand/user/watchers/FilterUserMetadataForKey.kt

@@ -30,12 +30,14 @@ import com.vitorpamplona.quartz.nip01Core.relay.filters.Filter
 import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
 import com.vitorpamplona.quartz.nip17Dm.settings.ChatMessageRelayListEvent
 import com.vitorpamplona.quartz.nip38UserStatus.StatusEvent
+import com.vitorpamplona.quartz.nip39ExtIdentities.ExternalIdentitiesEvent
 import com.vitorpamplona.quartz.nip65RelayList.AdvertisedRelayListEvent
 import com.vitorpamplona.quartz.utils.mapOfSet
 
 val UserMetadataForKeyKinds =
     listOf(
         MetadataEvent.KIND,
+        ExternalIdentitiesEvent.KIND,
         StatusEvent.KIND,
         AdvertisedRelayListEvent.KIND,
         ChatMessageRelayListEvent.KIND,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewUserMetadataViewModel.kt

@@ -39,6 +39,7 @@ import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.quartz.nip39ExtIdentities.GitHubIdentity
 import com.vitorpamplona.quartz.nip39ExtIdentities.MastodonIdentity
 import com.vitorpamplona.quartz.nip39ExtIdentities.TwitterIdentity
+import com.vitorpamplona.quartz.nip39ExtIdentities.identityClaims
 import kotlin.coroutines.cancellation.CancellationException
 
 class NewUserMetadataViewModel : ViewModel() {
@@ -82,18 +83,23 @@ class NewUserMetadataViewModel : ViewModel() {
             nip05.value = it.info.nip05 ?: ""
             lnAddress.value = it.info.lud16 ?: ""
             lnURL.value = it.info.lud06 ?: ""
+        }
 
-            twitter.value = ""
+        twitter.value = ""
-            github.value = ""
+        github.value = ""
-            mastodon.value = ""
+        mastodon.value = ""
 
-            // TODO: Validate Telegram input, somehow.
+        // Load identities from kind 10011 first, fall back to kind 0 for backwards compat
-            it.identities.forEach { identity ->
+        val identities =
-                when (identity) {
+            account.userMetadata.getExternalIdentitiesEvent()?.identityClaims()
-                    is TwitterIdentity -> twitter.value = identity.toProofUrl()
+                ?: account.userProfile().metadataOrNull()?.flow?.value?.identities
-                    is GitHubIdentity -> github.value = identity.toProofUrl()
+                ?: emptyList()
-                    is MastodonIdentity -> mastodon.value = identity.toProofUrl()
+
-                }
+        identities.forEach { identity ->
+            when (identity) {
+                is TwitterIdentity -> twitter.value = identity.toProofUrl()
+                is GitHubIdentity -> github.value = identity.toProofUrl()
+                is MastodonIdentity -> mastodon.value = identity.toProofUrl()
             }
         }
     }
@@ -111,12 +117,17 @@ class NewUserMetadataViewModel : ViewModel() {
                 nip05 = nip05.value,
                 lnAddress = lnAddress.value,
                 lnURL = lnURL.value,
+            )
+
+        val identities =
+            account.userMetadata.sendNewUserIdentities(
                 twitter = twitter.value,
                 mastodon = mastodon.value,
                 github = github.value,
             )
 
         account.sendLiterallyEverywhere(metadata)
+        account.sendLiterallyEverywhere(identities)
 
         clear()
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/ProfileScreen.kt

@@ -82,6 +82,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.hashtags.FollowedTa
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.hashtags.TabFollowedTags
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.ProfileHeader
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.apps.UserAppRecommendationsFeedViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.identity.UserExternalIdentitiesViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.mutual.TabMutualConversations
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.mutual.dal.UserProfileMutualFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.newthreads.TabNotesNewThreads
@@ -169,6 +170,12 @@ fun PrepareViewModels(
             factory = UserAppRecommendationsFeedViewModel.Factory(baseUser),
         )
 
+    val externalIdentities: UserExternalIdentitiesViewModel =
+        viewModel(
+            key = baseUser.pubkeyHex + "UserExternalIdentitiesViewModel",
+            factory = UserExternalIdentitiesViewModel.Factory(baseUser),
+        )
+
     val zapFeedViewModel: UserProfileZapsViewModel =
         viewModel(
             key = baseUser.pubkeyHex + "UserProfileZapsFeedViewModel",
@@ -233,6 +240,7 @@ fun PrepareViewModels(
         followsFeedViewModel,
         followersFeedViewModel,
         appRecommendations,
+        externalIdentities,
         zapFeedViewModel,
         bookmarksFeedViewModel,
         galleryFeedViewModel,
@@ -251,6 +259,7 @@ fun ProfileScreen(
     followsFeedViewModel: UserProfileFollowsUserFeedViewModel,
     followersFeedViewModel: UserProfileFollowersUserFeedViewModel,
     appRecommendations: UserAppRecommendationsFeedViewModel,
+    externalIdentities: UserExternalIdentitiesViewModel,
     zapFeedViewModel: UserProfileZapsViewModel,
     bookmarksFeedViewModel: UserProfileBookmarksFeedViewModel,
     galleryFeedViewModel: UserProfileGalleryFeedViewModel,
@@ -277,6 +286,7 @@ fun ProfileScreen(
             repliesViewModel,
             mutualViewModel,
             appRecommendations,
+            externalIdentities,
             followsFeedViewModel,
             followersFeedViewModel,
             zapFeedViewModel,
@@ -370,6 +380,7 @@ private fun RenderScreen(
     repliesViewModel: UserProfileConversationsFeedViewModel,
     mutualViewModel: UserProfileMutualFeedViewModel,
     appRecommendations: UserAppRecommendationsFeedViewModel,
+    externalIdentities: UserExternalIdentitiesViewModel,
     followsFeedViewModel: UserProfileFollowsUserFeedViewModel,
     followersFeedViewModel: UserProfileFollowersUserFeedViewModel,
     zapFeedViewModel: UserProfileZapsViewModel,
@@ -382,7 +393,7 @@ private fun RenderScreen(
     val pagerState = rememberPagerState { 11 }
 
     Column {
-        ProfileHeader(baseUser, appRecommendations, nav, accountViewModel)
+        ProfileHeader(baseUser, appRecommendations, externalIdentities, nav, accountViewModel)
         ScrollableTabRow(
             containerColor = Color.Transparent,
             contentColor = MaterialTheme.colorScheme.onBackground,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/header/DrawAdditionalInfo.kt

@@ -62,6 +62,7 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.apps.DisplayAppRecommendations
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.apps.UserAppRecommendationsFeedViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.badges.DisplayBadges
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.identity.UserExternalIdentitiesViewModel
 import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.amethyst.ui.theme.Size15Modifier
 import com.vitorpamplona.amethyst.ui.theme.Size16Modifier
@@ -81,6 +82,7 @@ private const val IDENTITY_ICON_CACHE_KEY = 0
 fun DrawAdditionalInfo(
     baseUser: User,
     appRecommendations: UserAppRecommendationsFeedViewModel,
+    externalIdentities: UserExternalIdentitiesViewModel,
     accountViewModel: AccountViewModel,
     nav: INav,
 ) {
@@ -88,6 +90,7 @@ fun DrawAdditionalInfo(
     val user = userState ?: return
     val uri = LocalUriHandler.current
     val clipboardManager = LocalClipboardManager.current
+    val identities by externalIdentities.identities.collectAsStateWithLifecycle()
 
     Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.padding(top = 7.dp)) {
         CreateTextWithEmoji(
@@ -183,8 +186,9 @@ fun DrawAdditionalInfo(
         }
     DisplayLNAddress(lud16, baseUser, accountViewModel, nav)
 
-    if (user.identities.isNotEmpty()) {
+    val displayIdentities = identities.ifEmpty { user.identities }
-        user.identities.forEach { identity: IdentityClaimTag ->
+    if (displayIdentities.isNotEmpty()) {
+        displayIdentities.forEach { identity: IdentityClaimTag ->
             Row(verticalAlignment = Alignment.CenterVertically) {
                 Icon(
                     tint = Color.Unspecified,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/header/ProfileHeader.kt

@@ -69,6 +69,7 @@ import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.note.ClickableUserPicture
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.apps.UserAppRecommendationsFeedViewModel
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.profile.header.identity.UserExternalIdentitiesViewModel
 import com.vitorpamplona.amethyst.ui.stringRes
 import com.vitorpamplona.amethyst.ui.theme.ButtonBorder
 import com.vitorpamplona.amethyst.ui.theme.Size100dp
@@ -82,6 +83,7 @@ import kotlinx.coroutines.launch
 fun ProfileHeader(
     baseUser: User,
     appRecommendations: UserAppRecommendationsFeedViewModel,
+    externalIdentities: UserExternalIdentitiesViewModel,
     nav: INav,
     accountViewModel: AccountViewModel,
 ) {
@@ -154,7 +156,7 @@ fun ProfileHeader(
                 }
             }
 
-            DrawAdditionalInfo(baseUser, appRecommendations, accountViewModel, nav)
+            DrawAdditionalInfo(baseUser, appRecommendations, externalIdentities, accountViewModel, nav)
 
             HorizontalDivider(modifier = Modifier.padding(top = 6.dp))
         }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/profile/header/identity/UserExternalIdentitiesViewModel.kt

@@ -0,0 +1,63 @@
+/*
+ * 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.profile.header.identity
+
+import androidx.compose.runtime.Stable
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.quartz.nip39ExtIdentities.ExternalIdentitiesEvent
+import com.vitorpamplona.quartz.nip39ExtIdentities.IdentityClaimTag
+import com.vitorpamplona.quartz.nip39ExtIdentities.identityClaims
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+
+@Stable
+class UserExternalIdentitiesViewModel(
+    val user: User,
+) : ViewModel() {
+    private val _identities = MutableStateFlow<List<IdentityClaimTag>>(emptyList())
+    val identities = _identities.asStateFlow()
+
+    private val note =
+        LocalCache.getOrCreateAddressableNote(
+            ExternalIdentitiesEvent.createAddress(user.pubkeyHex),
+        )
+
+    init {
+        viewModelScope.launch {
+            note.flow().metadata.stateFlow.collect { state ->
+                val event = state.note.event as? ExternalIdentitiesEvent
+                _identities.value = event?.identityClaims() ?: emptyList()
+            }
+        }
+    }
+
+    class Factory(
+        val user: User,
+    ) : ViewModelProvider.Factory {
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(modelClass: Class<T>): T = UserExternalIdentitiesViewModel(user) as T
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip39ExtIdentities/EventExt.kt

@@ -24,16 +24,17 @@ import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
 
 fun MetadataEvent.identityClaims() = tags.mapNotNull(IdentityClaimTag::parse)
 
-fun MetadataEvent.replaceClaims(
+fun ExternalIdentitiesEvent.identityClaims() = tags.mapNotNull(IdentityClaimTag::parse)
+
+fun List<IdentityClaimTag>.replaceClaims(
     twitter: String?,
     mastodon: String?,
     github: String?,
 ): List<IdentityClaimTag> {
-    var claims = identityClaims()
+    var claims = this
 
     // null leave as is. blank deletes it.
     if (twitter != null) {
-        // delete twitter
         claims = claims.filter { it !is TwitterIdentity }
         if (twitter.isNotBlank()) {
             TwitterIdentity.parseProofUrl(twitter)?.let { claims = claims + it }
@@ -42,7 +43,6 @@ fun MetadataEvent.replaceClaims(
 
     // null leave as is. blank deletes it.
     if (github != null) {
-        // delete github
         claims = claims.filter { it !is GitHubIdentity }
         if (github.isNotBlank()) {
             GitHubIdentity.parseProofUrl(github)?.let { claims = claims + it }
@@ -59,3 +59,15 @@ fun MetadataEvent.replaceClaims(
 
     return claims
 }
+
+fun MetadataEvent.replaceClaims(
+    twitter: String?,
+    mastodon: String?,
+    github: String?,
+): List<IdentityClaimTag> = identityClaims().replaceClaims(twitter, mastodon, github)
+
+fun ExternalIdentitiesEvent.replaceClaims(
+    twitter: String?,
+    mastodon: String?,
+    github: String?,
+): List<IdentityClaimTag> = identityClaims().replaceClaims(twitter, mastodon, github)

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip39ExtIdentities/ExternalIdentitiesEvent.kt

@@ -0,0 +1,86 @@
+/*
+ * 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.nip39ExtIdentities
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.quartz.nip01Core.core.Address
+import com.vitorpamplona.quartz.nip01Core.core.BaseReplaceableEvent
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
+import com.vitorpamplona.quartz.nip01Core.core.builder
+import com.vitorpamplona.quartz.nip01Core.signers.EventTemplate
+import com.vitorpamplona.quartz.nip01Core.signers.eventTemplate
+import com.vitorpamplona.quartz.nip31Alts.alt
+import com.vitorpamplona.quartz.utils.TimeUtils
+
+@Immutable
+class ExternalIdentitiesEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: Array<Array<String>>,
+    content: String,
+    sig: HexKey,
+) : BaseReplaceableEvent(id, pubKey, createdAt, KIND, tags, content, sig) {
+    companion object {
+        const val KIND = 10011
+        const val ALT_DESCRIPTION = "External Identities"
+        const val FIXED_D_TAG = ""
+
+        fun createAddress(pubKey: HexKey): Address = Address(KIND, pubKey, FIXED_D_TAG)
+
+        fun createAddressTag(pubKey: HexKey): String = Address.assemble(KIND, pubKey, FIXED_D_TAG)
+
+        fun createNew(
+            twitter: String? = null,
+            mastodon: String? = null,
+            github: String? = null,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<ExternalIdentitiesEvent>.() -> Unit = {},
+        ): EventTemplate<ExternalIdentitiesEvent> =
+            eventTemplate(KIND, "", createdAt) {
+                alt(ALT_DESCRIPTION)
+                twitter?.let { twitterClaim(it) }
+                mastodon?.let { mastodonClaim(it) }
+                github?.let { githubClaim(it) }
+                initializer()
+            }
+
+        fun updateFromPast(
+            latest: ExternalIdentitiesEvent,
+            twitter: String? = null,
+            mastodon: String? = null,
+            github: String? = null,
+            createdAt: Long = TimeUtils.now(),
+            initializer: TagArrayBuilder<ExternalIdentitiesEvent>.() -> Unit = {},
+        ): EventTemplate<ExternalIdentitiesEvent> {
+            val tags =
+                latest.tags.builder {
+                    alt(ALT_DESCRIPTION)
+                    val newClaims = latest.replaceClaims(twitter, mastodon, github)
+                    remove(IdentityClaimTag.TAG_NAME)
+                    claims(newClaims)
+                    initializer()
+                }
+            return EventTemplate(createdAt, KIND, tags, "")
+        }
+    }
+}

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip39ExtIdentities/TagArrayBuilderExt.kt

@@ -20,19 +20,19 @@
  */
 package com.vitorpamplona.quartz.nip39ExtIdentities
 
+import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.core.TagArrayBuilder
-import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
 
-fun TagArrayBuilder<MetadataEvent>.claims(identities: List<IdentityClaimTag>) = addAll(identities.map { it.toTagArray() })
+fun <T : Event> TagArrayBuilder<T>.claims(identities: List<IdentityClaimTag>) = addAll(identities.map { it.toTagArray() })
 
-fun TagArrayBuilder<MetadataEvent>.twitterClaim(twitter: TwitterIdentity) = add(twitter.toTagArray())
+fun <T : Event> TagArrayBuilder<T>.twitterClaim(twitter: TwitterIdentity) = add(twitter.toTagArray())
 
-fun TagArrayBuilder<MetadataEvent>.mastodonClaim(mastodon: MastodonIdentity) = add(mastodon.toTagArray())
+fun <T : Event> TagArrayBuilder<T>.mastodonClaim(mastodon: MastodonIdentity) = add(mastodon.toTagArray())
 
-fun TagArrayBuilder<MetadataEvent>.githubClaim(github: GitHubIdentity) = add(github.toTagArray())
+fun <T : Event> TagArrayBuilder<T>.githubClaim(github: GitHubIdentity) = add(github.toTagArray())
 
-fun TagArrayBuilder<MetadataEvent>.twitterClaim(twitterUrl: String) = TwitterIdentity.parseProofUrl(twitterUrl)?.let { twitterClaim(it) }
+fun <T : Event> TagArrayBuilder<T>.twitterClaim(twitterUrl: String) = TwitterIdentity.parseProofUrl(twitterUrl)?.let { twitterClaim(it) }
 
-fun TagArrayBuilder<MetadataEvent>.mastodonClaim(mastodonUrl: String) = MastodonIdentity.parseProofUrl(mastodonUrl)?.let { mastodonClaim(it) }
+fun <T : Event> TagArrayBuilder<T>.mastodonClaim(mastodonUrl: String) = MastodonIdentity.parseProofUrl(mastodonUrl)?.let { mastodonClaim(it) }
 
-fun TagArrayBuilder<MetadataEvent>.githubClaim(githubUrl: String) = GitHubIdentity.parseProofUrl(githubUrl)?.let { githubClaim(it) }
+fun <T : Event> TagArrayBuilder<T>.githubClaim(githubUrl: String) = GitHubIdentity.parseProofUrl(githubUrl)?.let { githubClaim(it) }

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

@@ -73,6 +73,7 @@ import com.vitorpamplona.quartz.nip35Torrents.TorrentEvent
 import com.vitorpamplona.quartz.nip37Drafts.DraftWrapEvent
 import com.vitorpamplona.quartz.nip37Drafts.privateOutbox.PrivateOutboxRelayListEvent
 import com.vitorpamplona.quartz.nip38UserStatus.StatusEvent
+import com.vitorpamplona.quartz.nip39ExtIdentities.ExternalIdentitiesEvent
 import com.vitorpamplona.quartz.nip42RelayAuth.RelayAuthEvent
 import com.vitorpamplona.quartz.nip46RemoteSigner.NostrConnectEvent
 import com.vitorpamplona.quartz.nip47WalletConnect.LnZapPaymentRequestEvent
@@ -224,6 +225,7 @@ class EventFactory {
                 EmojiPackSelectionEvent.KIND -> EmojiPackSelectionEvent(id, pubKey, createdAt, tags, content, sig)
                 EphemeralChatEvent.KIND -> EphemeralChatEvent(id, pubKey, createdAt, tags, content, sig)
                 EphemeralChatListEvent.KIND -> EphemeralChatListEvent(id, pubKey, createdAt, tags, content, sig)
+                ExternalIdentitiesEvent.KIND -> ExternalIdentitiesEvent(id, pubKey, createdAt, tags, content, sig)
                 FileHeaderEvent.KIND -> FileHeaderEvent(id, pubKey, createdAt, tags, content, sig)
                 ProfileGalleryEntryEvent.KIND -> ProfileGalleryEntryEvent(id, pubKey, createdAt, tags, content, sig)
                 FileServersEvent.KIND -> FileServersEvent(id, pubKey, createdAt, tags, content, sig)