Support for NIP-31 alt tags

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

@@ -477,10 +477,10 @@ class Account(
         }
     }
 
-    suspend fun sendNewUserMetadata(toString: String, identities: List<IdentityClaim>) {
+    suspend fun sendNewUserMetadata(toString: String, newName: String, identities: List<IdentityClaim>) {
         if (!isWriteable()) return
 
-        MetadataEvent.create(toString, identities, signer) {
+        MetadataEvent.create(toString, newName, identities, signer) {
             Client.send(it)
             LocalCache.justConsume(it, null)
         }

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

@@ -124,7 +124,7 @@ class NewUserMetadataViewModel : ViewModel() {
         ObjectMapper().writeValue(writer, currentJson)
 
         viewModelScope.launch(Dispatchers.IO) {
-            account.sendNewUserMetadata(writer.buffer.toString(), newClaims)
+            account.sendNewUserMetadata(writer.buffer.toString(), displayName.value.trim(), newClaims)
         }
         clear()
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/AdvertisedRelayListEvent.kt

@@ -51,7 +51,7 @@ class AdvertisedRelayListEvent(
                 } else {
                     arrayOf(it.relayUrl, it.type.code)
                 }
-            }.toTypedArray()
+            }.plusElement(arrayOf("alt", "Relay list event with ${list.size} relays")).toTypedArray()
             val msg = ""
 
             signer.sign(createdAt, kind, tags, msg, onReady)

quartz/src/main/java/com/vitorpamplona/quartz/events/AppDefinitionEvent.kt

@@ -50,11 +50,14 @@ class AppDefinitionEvent(
         const val kind = 31990
 
         fun create(
+            details: UserMetadata,
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (AppDefinitionEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(
+                arrayOf("alt", "App definition event for ${details.name}")
+            )
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/AppRecommendationEvent.kt

@@ -21,13 +21,16 @@ class AppRecommendationEvent(
 
     companion object {
         const val kind = 31989
+        const val alt = "App recommendations by the author"
 
         fun create(
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (AppRecommendationEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(
+                arrayOf("alt", alt)
+            )
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/AudioHeaderEvent.kt

@@ -24,6 +24,7 @@ class AudioHeaderEvent(
 
     companion object {
         const val kind = 1808
+        const val alt = "Audio header"
 
         private const val DOWNLOAD_URL = "download_url"
         private const val STREAM_URL = "stream_url"
@@ -49,7 +50,8 @@ class AudioHeaderEvent(
                     } else {
                         null
                     }
-                }
+                },
+                arrayOf("alt", alt)
             ).toTypedArray()
 
             signer.sign(createdAt, kind, tags, description, onReady)

quartz/src/main/java/com/vitorpamplona/quartz/events/AudioTrackEvent.kt

@@ -28,6 +28,7 @@ class AudioTrackEvent(
 
     companion object {
         const val kind = 31337
+        const val alt = "Audio track"
 
         private const val TYPE = "c"
         private const val PRICE = "price"
@@ -50,7 +51,8 @@ class AudioTrackEvent(
                 arrayOf(TYPE, type),
                 price?.let { arrayOf(PRICE, it) },
                 cover?.let { arrayOf(COVER, it) },
-                subject?.let { arrayOf(SUBJECT, it) }
+                subject?.let { arrayOf(SUBJECT, it) },
+                arrayOf("alt", alt)
             ).toTypedArray()
 
             signer.sign(createdAt, kind, tags, "", onReady)

quartz/src/main/java/com/vitorpamplona/quartz/events/BadgeAwardEvent.kt

@@ -18,5 +18,6 @@ class BadgeAwardEvent(
 
     companion object {
         const val kind = 8
+        const val alt = "Badge award"
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/events/BadgeDefinitionEvent.kt

@@ -20,5 +20,6 @@ class BadgeDefinitionEvent(
 
     companion object {
         const val kind = 30009
+        const val alt = "Badge definition"
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/events/BadgeProfilesEvent.kt

@@ -24,5 +24,6 @@ class BadgeProfilesEvent(
     companion object {
         const val kind = 30008
         const val standardDTAg = "profile_badges"
+        const val alt = "List of accepted badges by the author"
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/events/BookmarkListEvent.kt

@@ -19,6 +19,7 @@ class BookmarkListEvent(
 ) : GeneralListEvent(id, pubKey, createdAt, kind, tags, content, sig) {
     companion object {
         const val kind = 30001
+        const val alt = "List of bookmarks"
 
         fun addEvent(
             earlierVersion: BookmarkListEvent?,
@@ -166,7 +167,13 @@ class BookmarkListEvent(
             createdAt: Long = TimeUtils.now(),
             onReady: (BookmarkListEvent) -> Unit
         ) {
-            signer.sign(createdAt, kind, tags, content, onReady)
+            val newTags = if (tags.any { it.size > 1 && it[0] == "alt" }) {
+                tags
+            } else {
+                tags + arrayOf("alt", alt)
+            }
+
+            signer.sign(createdAt, kind, newTags, content, onReady)
         }
 
         fun create(
@@ -196,6 +203,7 @@ class BookmarkListEvent(
             addresses?.forEach {
                 tags.add(arrayOf("a", it.toTag()))
             }
+            tags.add(arrayOf("alt", alt))
 
             createPrivateTags(privEvents, privUsers, privAddresses, signer) { content ->
                 signer.sign(createdAt, kind, tags.toTypedArray(), content, onReady)

quartz/src/main/java/com/vitorpamplona/quartz/events/CalendarDateSlotEvent.kt

@@ -27,13 +27,14 @@ class CalendarDateSlotEvent(
 
     companion object {
         const val kind = 31922
+        const val alt = "Full-day calendar event"
 
         fun create(
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (CalendarDateSlotEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(arrayOf("alt", alt))
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/CalendarEvent.kt

@@ -19,13 +19,14 @@ class CalendarEvent(
 ) : BaseAddressableEvent(id, pubKey, createdAt, kind, tags, content, sig) {
     companion object {
         const val kind = 31924
+        const val alt = "Calendar"
 
         fun create(
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (CalendarEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(arrayOf("alt", alt))
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/CalendarRSVPEvent.kt

@@ -29,13 +29,14 @@ class CalendarRSVPEvent(
 
     companion object {
         const val kind = 31925
+        const val alt = "Calendar event's invitation response"
 
         fun create(
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (CalendarRSVPEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(arrayOf("alt", alt))
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/CalendarTimeSlotEvent.kt

@@ -31,13 +31,14 @@ class CalendarTimeSlotEvent(
 
     companion object {
         const val kind = 31923
+        const val alt = "Calendar time-slot event"
 
         fun create(
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (CalendarTimeSlotEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(arrayOf("alt", alt))
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelCreateEvent.kt

@@ -65,7 +65,11 @@ class ChannelCreateEvent(
                 ""
             }
 
-            signer.sign(createdAt, kind, emptyArray(), content, onReady)
+            val tags = arrayOf(
+                arrayOf("alt", "Public chat creation event ${channelInfo?.name?.let { "about ${it}" }}")
+            )
+
+            signer.sign(createdAt, kind, tags, content, onReady)
         }
     }
 

quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelHideMessageEvent.kt

@@ -26,6 +26,7 @@ class ChannelHideMessageEvent(
 
     companion object {
         const val kind = 43
+        const val alt = "Hide message instruction for public chats"
 
         fun create(
             reason: String,
@@ -35,9 +36,9 @@ class ChannelHideMessageEvent(
             onReady: (ChannelHideMessageEvent) -> Unit
         ) {
             val tags =
-                messagesToHide?.map {
+                (messagesToHide?.map {
                     arrayOf("e", it)
-                }?.toTypedArray() ?: emptyArray()
+                }?.toTypedArray() ?: emptyArray()) + arrayOf(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags, reason, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelMessageEvent.kt

@@ -25,6 +25,7 @@ class ChannelMessageEvent(
 
     companion object {
         const val kind = 42
+        const val alt = "Public chat message"
 
         fun create(
             message: String,
@@ -66,6 +67,9 @@ class ChannelMessageEvent(
                     //tags.add(arrayOf("nip94", it.toJson()))
                 }
             }
+            tags.add(
+                arrayOf("alt", alt)
+            )
 
             signer.sign(createdAt, kind, tags.toTypedArray(), message, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelMetadataEvent.kt

@@ -30,6 +30,7 @@ class ChannelMetadataEvent(
 
     companion object {
         const val kind = 41
+        const val alt = "This is a public chat definition update"
 
         fun create(
             name: String?,
@@ -65,7 +66,10 @@ class ChannelMetadataEvent(
                     ""
                 }
 
-            val tags = listOf(arrayOf("e", originalChannelIdHex, "", "root"))
+            val tags = listOf(
+                arrayOf("e", originalChannelIdHex, "", "root"),
+                arrayOf("alt", "Public chat update to ${newChannelInfo?.name}")
+            )
             signer.sign(createdAt, kind, tags.toTypedArray(), content, onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/ChannelMuteUserEvent.kt

@@ -26,6 +26,7 @@ class ChannelMuteUserEvent(
 
     companion object {
         const val kind = 44
+        const val alt = "Mute user instruction for public chats"
 
         fun create(
             reason: String,
@@ -35,9 +36,9 @@ class ChannelMuteUserEvent(
             onReady: (ChannelMuteUserEvent) -> Unit
         ) {
             val content = reason
-            val tags = usersToMute?.map {
+            val tags = (usersToMute?.map {
                 arrayOf("p", it)
-            }?.toTypedArray() ?: emptyArray()
+            }?.toTypedArray() ?: emptyArray()) + arrayOf(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags, content, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/ChatMessageEvent.kt

@@ -49,6 +49,7 @@ class ChatMessageEvent(
 
     companion object {
         const val kind = 14
+        const val alt = "Direct message"
 
         fun create(
             msg: String,
@@ -89,6 +90,7 @@ class ChatMessageEvent(
             subject?.let {
                 tags.add(arrayOf("subject", it))
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), msg, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/ClassifiedsEvent.kt

@@ -43,6 +43,7 @@ class ClassifiedsEvent(
     companion object {
         const val kind = 30402
         private val imageExtensions = listOf("png", "jpg", "gif", "bmp", "jpeg", "webp", "svg")
+        const val alt = "Classifieds listing"
 
         fun create(
             dTag: String,
@@ -145,6 +146,7 @@ class ClassifiedsEvent(
                     //tags.add(arrayOf("nip94", it.toJson()))
                 }
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), message, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/CommunityDefinitionEvent.kt

@@ -25,14 +25,16 @@ class CommunityDefinitionEvent(
 
     companion object {
         const val kind = 34550
+        const val alt = "Community definition"
 
         fun create(
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (CommunityDefinitionEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = mutableListOf<Array<String>>()
-            signer.sign(createdAt, kind, tags, "", onReady)
+            tags.add(arrayOf("alt", alt))
+            signer.sign(createdAt, kind, tags.toTypedArray(), "", onReady)
         }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/events/CommunityPostApprovalEvent.kt

@@ -45,6 +45,7 @@ class CommunityPostApprovalEvent(
 
     companion object {
         const val kind = 4550
+        const val alt = "Community post approval"
 
         fun create(
             approvedPost: Event,
@@ -59,8 +60,9 @@ class CommunityPostApprovalEvent(
             val replyToPost = arrayOf("e", approvedPost.id())
             val replyToAuthor = arrayOf("p", approvedPost.pubKey())
             val innerKind = arrayOf("k", "${approvedPost.kind()}")
+            val alt = arrayOf("alt", alt)
 
-            val tags: Array<Array<String>> = arrayOf(communities, replyToPost, replyToAuthor, innerKind)
+            val tags: Array<Array<String>> = arrayOf(communities, replyToPost, replyToAuthor, innerKind, alt)
 
             signer.sign(createdAt, kind, tags, content, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/ContactListEvent.kt

@@ -92,6 +92,7 @@ class ContactListEvent(
 
     companion object {
         const val kind = 3
+        const val alt = "Follow List"
 
         fun createFromScratch(
             followUsers: List<Contact>,
@@ -282,7 +283,13 @@ class ContactListEvent(
             createdAt: Long = TimeUtils.now(),
             onReady: (ContactListEvent) -> Unit
         ) {
-            signer.sign(createdAt, kind, tags, content, onReady)
+            val newTags = if (tags.any { it.size > 1 && it[0] == "alt" }) {
+                tags
+            } else {
+                tags + arrayOf("alt", alt)
+            }
+
+            signer.sign(createdAt, kind, newTags, content, onReady)
         }
     }
 

quartz/src/main/java/com/vitorpamplona/quartz/events/DeletionEvent.kt

@@ -21,10 +21,11 @@ class DeletionEvent(
 
     companion object {
         const val kind = 5
+        const val alt = "Deletion event"
 
         fun create(deleteEvents: List<String>, signer: NostrSigner, createdAt: Long = TimeUtils.now(), onReady: (DeletionEvent) -> Unit) {
             val content = ""
-            val tags = deleteEvents.map { arrayOf("e", it) }.toTypedArray()
+            val tags = deleteEvents.map { arrayOf("e", it) }.plusElement(arrayOf("alt", alt)).toTypedArray()
             signer.sign(createdAt, kind, tags, content, onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/EmojiPackEvent.kt

@@ -19,6 +19,7 @@ class EmojiPackEvent(
 
     companion object {
         const val kind = 30030
+        const val alt = "Emoji pack"
 
         fun create(
             name: String = "",
@@ -30,6 +31,7 @@ class EmojiPackEvent(
 
             val tags = mutableListOf<Array<String>>()
             tags.add(arrayOf("d", name))
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), content, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/EmojiPackSelectionEvent.kt

@@ -23,6 +23,7 @@ class EmojiPackSelectionEvent(
     companion object {
         const val kind = 10030
         const val fixedDTag = ""
+        const val alt = "Emoji selection"
 
         fun create(
             listOfEmojiPacks: List<ATag>?,
@@ -37,6 +38,8 @@ class EmojiPackSelectionEvent(
                 tags.add(arrayOf("a", it.toTag()))
             }
 
+            tags.add(arrayOf("alt", alt))
+
             signer.sign(createdAt, kind, tags.toTypedArray(), msg, onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/FileHeaderEvent.kt

@@ -35,6 +35,7 @@ class FileHeaderEvent(
 
     companion object {
         const val kind = 1063
+        const val altDescription = "Verifiable file url"
 
         private const val URL = "url"
         private const val ENCRYPTION_KEY = "aes-256-gcm"
@@ -70,7 +71,7 @@ class FileHeaderEvent(
                 arrayOf(URL, url),
                 magnetUri?.let { arrayOf(MAGNET_URI, it) },
                 mimeType?.let { arrayOf(MIME_TYPE, it) },
-                alt?.ifBlank { null }?.let { arrayOf(ALT, it) },
+                alt?.ifBlank { null }?.let { arrayOf(ALT, it) } ?: arrayOf("alt", altDescription),
                 hash?.let { arrayOf(HASH, it) },
                 size?.let { arrayOf(FILE_SIZE, it) },
                 dimensions?.let { arrayOf(DIMENSION, it) },

quartz/src/main/java/com/vitorpamplona/quartz/events/FileServersEvent.kt

@@ -23,6 +23,7 @@ class FileServersEvent(
     companion object {
         const val kind = 10096
         const val fixedDTag = ""
+        const val alt = "File servers used by the author"
 
         fun create(
             listOfServers: List<String>,
@@ -36,6 +37,7 @@ class FileServersEvent(
             listOfServers.forEach {
                 tags.add(arrayOf("server", it))
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), msg, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/FileStorageEvent.kt

@@ -33,6 +33,7 @@ class FileStorageEvent(
 
     companion object {
         const val kind = 1064
+        const val alt = "Binary data"
 
         private const val TYPE = "type"
         private const val DECRYPT = "decrypt"
@@ -49,7 +50,8 @@ class FileStorageEvent(
             onReady: (FileStorageEvent) -> Unit
         ) {
             val tags = listOfNotNull(
-                arrayOf(TYPE, mimeType)
+                arrayOf(TYPE, mimeType),
+                arrayOf("alt", alt)
             )
 
             val content = encode(data)

quartz/src/main/java/com/vitorpamplona/quartz/events/FileStorageHeaderEvent.kt

@@ -31,6 +31,7 @@ class FileStorageHeaderEvent(
 
     companion object {
         const val kind = 1065
+        const val altDescription = "Descriptors for a binary file"
 
         private const val ENCRYPTION_KEY = "aes-256-gcm"
         private const val MIME_TYPE = "m"
@@ -62,7 +63,7 @@ class FileStorageHeaderEvent(
                 arrayOf("e", storageEvent.id),
                 mimeType?.let { arrayOf(MIME_TYPE, mimeType) },
                 hash?.let { arrayOf(HASH, it) },
-                alt?.let { arrayOf(ALT, it) },
+                alt?.let { arrayOf(ALT, it) } ?: arrayOf("alt", altDescription),
                 size?.let { arrayOf(FILE_SIZE, it) },
                 dimensions?.let { arrayOf(DIMENSION, it) },
                 blurhash?.let { arrayOf(BLUR_HASH, it) },

quartz/src/main/java/com/vitorpamplona/quartz/events/GenericRepostEvent.kt

@@ -29,6 +29,7 @@ class GenericRepostEvent(
 
     companion object {
         const val kind = 16
+        const val alt = "Generic repost"
 
         fun create(
             boostedPost: EventInterface,
@@ -38,16 +39,17 @@ class GenericRepostEvent(
         ) {
             val content = boostedPost.toJson()
 
-            val replyToPost = arrayOf("e", boostedPost.id())
+            val tags = mutableListOf(
-            val replyToAuthor = arrayOf("p", boostedPost.pubKey())
+                arrayOf("e", boostedPost.id()),
-
+                arrayOf("p", boostedPost.pubKey())
-            var tags: List<Array<String>> = listOf(replyToPost, replyToAuthor)
+            )
 
             if (boostedPost is AddressableEvent) {
-                tags = tags + listOf(arrayOf("a", boostedPost.address().toTag()))
+                tags.add(arrayOf("a", boostedPost.address().toTag()))
             }
 
-            tags = tags + listOf(arrayOf("k", "${boostedPost.kind()}"))
+            tags.add(arrayOf("k", "${boostedPost.kind()}"))
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), content, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/GiftWrapEvent.kt

@@ -62,6 +62,7 @@ class GiftWrapEvent(
 
     companion object {
         const val kind = 1059
+        const val alt = "Encrypted event"
 
         fun create(
             event: Event,
@@ -71,7 +72,7 @@ class GiftWrapEvent(
         ) {
             val signer = NostrSignerInternal(KeyPair()) // GiftWrap is always a random key
             val serializedContent = toJson(event)
-            val tags = arrayOf(arrayOf("p", recipientPubKey))
+            val tags = arrayOf(arrayOf("p", recipientPubKey), arrayOf("alt", alt))
 
             signer.nip44Encrypt(serializedContent, recipientPubKey) {
                 signer.sign(createdAt, kind, tags, it, onReady)

quartz/src/main/java/com/vitorpamplona/quartz/events/HighlightEvent.kt

@@ -25,6 +25,7 @@ class HighlightEvent(
 
     companion object {
         const val kind = 9802
+        const val alt = "Highlight/quote event"
 
         fun create(
             msg: String,
@@ -32,7 +33,7 @@ class HighlightEvent(
             createdAt: Long = TimeUtils.now(),
             onReady: (HighlightEvent) -> Unit
         ) {
-            signer.sign(createdAt, kind, emptyArray(), msg, onReady)
+            signer.sign(createdAt, kind, arrayOf(arrayOf("alt", alt)), msg, onReady)
         }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/events/LiveActivitiesChatMessageEvent.kt

@@ -44,6 +44,7 @@ class LiveActivitiesChatMessageEvent(
 
     companion object {
         const val kind = 1311
+        const val alt = "Live activity chat message"
 
         fun create(
             message: String,
@@ -86,6 +87,7 @@ class LiveActivitiesChatMessageEvent(
                     //tags.add(arrayOf("nip94", it.toJson()))
                 }
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), content, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/LiveActivitiesEvent.kt

@@ -45,6 +45,7 @@ class LiveActivitiesEvent(
 
     companion object {
         const val kind = 30311
+        const val alt = "Live activity event"
 
         const val STATUS_LIVE = "live"
         const val STATUS_PLANNED = "planned"
@@ -55,7 +56,7 @@ class LiveActivitiesEvent(
             createdAt: Long = TimeUtils.now(),
             onReady: (LiveActivitiesEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(arrayOf("alt", alt))
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapEvent.kt

@@ -63,6 +63,7 @@ class LnZapEvent(
 
     companion object {
         const val kind = 9735
+        const val alt = "Zap event"
     }
 
     enum class ZapType() {

quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentRequestEvent.kt

@@ -56,6 +56,7 @@ class LnZapPaymentRequestEvent(
 
     companion object {
         const val kind = 23194
+        const val alt = "Zap payment request"
 
         fun create(
             lnInvoice: String,
@@ -66,7 +67,7 @@ class LnZapPaymentRequestEvent(
         ) {
             val serializedRequest = mapper.writeValueAsString(PayInvoiceMethod.create(lnInvoice))
 
-            val tags = arrayOf(arrayOf("p", walletServicePubkey))
+            val tags = arrayOf(arrayOf("p", walletServicePubkey), arrayOf("alt", alt))
 
             signer.nip04Encrypt(
                 serializedRequest,

quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPaymentResponseEvent.kt

@@ -63,6 +63,7 @@ class LnZapPaymentResponseEvent(
 
     companion object {
         const val kind = 23195
+        const val alt = "Zap payment response"
     }
 }
 

quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapPrivateEvent.kt

@@ -28,6 +28,7 @@ class LnZapPrivateEvent(
 
     companion object {
         const val kind = 9733
+        const val alt = "Private zap"
 
         fun create(
             signer: NostrSigner,

quartz/src/main/java/com/vitorpamplona/quartz/events/LnZapRequestEvent.kt

@@ -74,6 +74,7 @@ class LnZapRequestEvent(
 
     companion object {
         const val kind = 9734
+        const val alt = "Zap request"
 
         fun create(
             originalNote: EventInterface,
@@ -91,7 +92,8 @@ class LnZapRequestEvent(
             var tags = listOf(
                 arrayOf("e", originalNote.id()),
                 arrayOf("p", toUserPubHex ?: originalNote.pubKey()),
-                arrayOf("relays") + relays
+                arrayOf("relays") + relays,
+                arrayOf("alt", alt)
             )
             if (originalNote is AddressableEvent) {
                 tags = tags + listOf(arrayOf("a", originalNote.address().toTag()))

quartz/src/main/java/com/vitorpamplona/quartz/events/LongTextNoteEvent.kt

@@ -36,6 +36,7 @@ class LongTextNoteEvent(
 
         fun create(
             msg: String,
+            title: String?,
             replyTos: List<String>?,
             mentions: List<String>?,
             signer: NostrSigner,
@@ -49,6 +50,10 @@ class LongTextNoteEvent(
             mentions?.forEach {
                 tags.add(arrayOf("p", it))
             }
+            title?.let {
+                tags.add(arrayOf("title", it))
+            }
+            tags.add(arrayOf("alt","Blog post: $title"))
             signer.sign(createdAt, kind, tags.toTypedArray(), msg, onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/MetadataEvent.kt

@@ -152,6 +152,7 @@ class MetadataEvent(
 
         fun create(
             contactMetaData: String,
+            newName: String,
             identities: List<IdentityClaim>,
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
@@ -159,6 +160,10 @@ class MetadataEvent(
         ) {
             val tags = mutableListOf<Array<String>>()
 
+            tags.add(
+                arrayOf("alt", "User profile for ${newName}")
+            )
+
             identities.forEach {
                 tags.add(arrayOf("i", it.platformIdentity(), it.proof))
             }

quartz/src/main/java/com/vitorpamplona/quartz/events/MuteListEvent.kt

@@ -54,6 +54,7 @@ class MuteListEvent(
     companion object {
         const val kind = 10000
         const val fixedDTag = ""
+        const val alt = "Mute List"
 
         fun blockListFor(pubKeyHex: HexKey): String {
             return "10000:$pubKeyHex:"
@@ -209,7 +210,13 @@ class MuteListEvent(
             createdAt: Long = TimeUtils.now(),
             onReady: (MuteListEvent) -> Unit
         ) {
-            signer.sign(createdAt, kind, tags, content, onReady)
+            val newTags = if (tags.any { it.size > 1 && it[0] == "alt" }) {
+                tags
+            } else {
+                tags + arrayOf("alt", alt)
+            }
+
+            signer.sign(createdAt, kind, newTags, content, onReady)
         }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/events/NNSEvent.kt

@@ -23,13 +23,14 @@ class NNSEvent(
 
     companion object {
         const val kind = 30053
+        const val alt = "DNS records"
 
         fun create(
             signer: NostrSigner,
             createdAt: Long = TimeUtils.now(),
             onReady: (NNSEvent) -> Unit
         ) {
-            val tags = emptyArray<Array<String>>()
+            val tags = arrayOf(arrayOf("alt", alt))
             signer.sign(createdAt, kind, tags, "", onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/PeopleListEvent.kt

@@ -87,6 +87,7 @@ class PeopleListEvent(
     companion object {
         const val kind = 30000
         const val blockList = "mute"
+        const val alt = "List of people"
 
         fun blockListFor(pubKeyHex: HexKey): String {
             return "30000:$pubKeyHex:$blockList"
@@ -242,7 +243,13 @@ class PeopleListEvent(
             createdAt: Long = TimeUtils.now(),
             onReady: (PeopleListEvent) -> Unit
         ) {
-            signer.sign(createdAt, kind, tags, content, onReady)
+            val newTags = if (tags.any { it.size > 1 && it[0] == "alt" }) {
+                tags
+            } else {
+                tags + arrayOf("alt", alt)
+            }
+
+            signer.sign(createdAt, kind, newTags, content, onReady)
         }
     }
 }

quartz/src/main/java/com/vitorpamplona/quartz/events/PinListEvent.kt

@@ -22,6 +22,7 @@ class PinListEvent(
 
     companion object {
         const val kind = 33888
+        const val alt = "Pinned Posts"
 
         fun create(
             pins: List<String>,
@@ -33,6 +34,7 @@ class PinListEvent(
             pins.forEach {
                 tags.add(arrayOf("pin", it))
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), "", onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/PollNoteEvent.kt

@@ -43,6 +43,7 @@ class PollNoteEvent(
 
     companion object {
         const val kind = 6969
+        const val alt = "Poll event"
 
         fun create(
             msg: String,
@@ -105,6 +106,7 @@ class PollNoteEvent(
                     //tags.add(arrayOf("nip94", it.toJson()))
                 }
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), msg, onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/PrivateDmEvent.kt

@@ -90,7 +90,7 @@ class PrivateDmEvent(
 
     companion object {
         const val kind = 4
-
+        const val alt = "Private Message"
         const val nip18Advertisement = "[//]: # (nip18)\n"
 
         fun create(
@@ -131,6 +131,7 @@ class PrivateDmEvent(
             geohash?.let {
                 tags.addAll(geohashMipMap(it))
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.nip04Encrypt(message, recipientPubKey) { content ->
                 signer.sign(createdAt, kind, tags.toTypedArray(), content, onReady)

quartz/src/main/java/com/vitorpamplona/quartz/events/RelaySetEvent.kt

@@ -22,6 +22,7 @@ class RelaySetEvent(
 
     companion object {
         const val kind = 30022
+        const val alt = "Relay list"
 
         fun create(
             relays: List<String>,
@@ -33,6 +34,7 @@ class RelaySetEvent(
             relays.forEach {
                 tags.add(arrayOf("r", it))
             }
+            tags.add(arrayOf("alt", alt))
 
             signer.sign(createdAt, kind, tags.toTypedArray(), "", onReady)
         }

quartz/src/main/java/com/vitorpamplona/quartz/events/ReportEvent.kt

@@ -69,9 +69,11 @@ class ReportEvent(
             var tags: Array<Array<String>> = arrayOf(reportPostTag, reportAuthorTag)
 
             if (reportedPost is AddressableEvent) {
-                tags = tags + listOf(arrayOf("a", reportedPost.address().toTag()))
+                tags += listOf(arrayOf("a", reportedPost.address().toTag()))
             }
 
+            tags += listOf(arrayOf("alt", "Report for ${type.name}"))
+
             signer.sign(createdAt, kind, tags, content, onReady)
         }
 
@@ -85,8 +87,9 @@ class ReportEvent(
             val content = ""
 
             val reportAuthorTag = arrayOf("p", reportedUser, type.name.lowercase())
+            val alt = arrayOf("alt", "Report for ${type.name}")
 
-            val tags: Array<Array<String>> = arrayOf(reportAuthorTag)
+            val tags: Array<Array<String>> = arrayOf(reportAuthorTag, alt)
             signer.sign(createdAt, kind, tags, content, onReady)
         }
     }

quartz/src/main/java/com/vitorpamplona/quartz/events/RepostEvent.kt

@@ -29,6 +29,7 @@ class RepostEvent(
 
     companion object {
         const val kind = 6
+        const val alt = "Repost event"
 
         fun create(
             boostedPost: EventInterface,
@@ -44,9 +45,11 @@ class RepostEvent(
             var tags: Array<Array<String>> = arrayOf(replyToPost, replyToAuthor)
 
             if (boostedPost is AddressableEvent) {
-                tags = tags + listOf(arrayOf("a", boostedPost.address().toTag()))
+                tags += listOf(arrayOf("a", boostedPost.address().toTag()))
             }
 
+            tags += listOf(arrayOf("alt", alt))
+
             signer.sign(createdAt, kind, tags, content, onReady)
         }
     }