composeApp/build.gradle.kts

@@ -25,7 +25,7 @@ kotlin {
             implementation("org.jetbrains.compose.material3:material3:1.11.0-alpha07")
             implementation("io.coil-kt.coil3:coil-compose:3.4.0")
             implementation("io.coil-kt.coil3:coil-network-okhttp:3.4.0")
-            implementation("su.reya:nostr-sdk-kmp:0.2.2")
+            implementation("su.reya:nostr-sdk-kmp:0.2.3")
         }
         commonMain.dependencies {
             implementation(libs.compose.runtime)

composeApp/src/androidMain/kotlin/su/reya/coop/screens/ChatScreen.kt

@@ -53,7 +53,7 @@ import coop.composeapp.generated.resources.ic_arrow_back
 import coop.composeapp.generated.resources.ic_avatar
 import coop.composeapp.generated.resources.ic_send
 import org.jetbrains.compose.resources.painterResource
-import rust.nostr.sdk.Event
+import rust.nostr.sdk.UnsignedEvent
 import su.reya.coop.LocalNostrViewModel
 import su.reya.coop.LocalSnackbarHostState
 import su.reya.coop.humanReadable
@@ -76,7 +76,7 @@ fun ChatScreen(
     var text by remember { mutableStateOf("") }
     var loading by remember { mutableStateOf(true) }
 
-    val messages = remember { mutableStateListOf<Event>() }
+    val messages = remember { mutableStateListOf<UnsignedEvent>() }
 
     fun setLoading(value: Boolean) {
         loading = value
@@ -177,7 +177,7 @@ fun ChatScreen(
                             contentPadding = PaddingValues(16.dp),
                             reverseLayout = true
                         ) {
-                            items(messages.toList(), key = { it.id().toBech32() }) { event ->
+                            items(messages.toList(), key = { it.id()?.toBech32()!! }) { event ->
                                 ChatMessage(event)
                             }
                         }
@@ -198,11 +198,11 @@ fun ChatScreen(
 
 @Composable
 fun ChatMessage(
-    event: Event
+    rumor: UnsignedEvent
 ) {
     val viewModel = LocalNostrViewModel.current
     val currentUser = viewModel.currentUser()
-    val isMine = event.author() == currentUser
+    val isMine = rumor.author() == currentUser
 
     val bubbleShape = if (isMine) {
         RoundedCornerShape(topStart = 20.dp, topEnd = 20.dp, bottomStart = 20.dp, bottomEnd = 4.dp)
@@ -226,7 +226,7 @@ fun ChatMessage(
             horizontalAlignment = if (isMine) Alignment.End else Alignment.Start
         ) {
             Text(
-                text = event.createdAt().humanReadable(),
+                text = rumor.createdAt().humanReadable(),
                 style = MaterialTheme.typography.labelSmall,
                 textAlign = if (isMine) TextAlign.End else TextAlign.Start,
             )
@@ -238,7 +238,7 @@ fun ChatMessage(
                 modifier = Modifier.widthIn(max = 280.dp)
             ) {
                 Text(
-                    text = event.content(),
+                    text = rumor.content(),
                     modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp),
                     style = MaterialTheme.typography.bodyMedium
                 )

shared/build.gradle.kts

@@ -28,7 +28,7 @@ kotlin {
             implementation("org.jetbrains.androidx.lifecycle:lifecycle-viewmodel-compose:2.10.0")
             implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2")
             implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.8.0")
-            implementation("su.reya:nostr-sdk-kmp:0.2.2")
+            implementation("su.reya:nostr-sdk-kmp:0.2.3")
             implementation("com.squareup.okio:okio:3.16.2")
             implementation(libs.ktor.client.core)
             implementation(libs.ktor.client.websockets)

shared/src/commonMain/kotlin/su/reya/coop/Nostr.kt

@@ -7,6 +7,7 @@ import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import rust.nostr.sdk.AckPolicy
+import rust.nostr.sdk.Alphabet
 import rust.nostr.sdk.AsyncNostrSigner
 import rust.nostr.sdk.Client
 import rust.nostr.sdk.ClientBuilder
@@ -33,6 +34,7 @@ import rust.nostr.sdk.RelayUrl
 import rust.nostr.sdk.ReqExitPolicy
 import rust.nostr.sdk.ReqTarget
 import rust.nostr.sdk.SendEventTarget
+import rust.nostr.sdk.SingleLetterTag
 import rust.nostr.sdk.SleepWhenIdle
 import rust.nostr.sdk.SubscribeAutoCloseOptions
 import rust.nostr.sdk.Tag
@@ -182,8 +184,8 @@ class Nostr {
 
     suspend fun handleNotifications(
         onMetadataUpdate: (PublicKey, Metadata) -> Unit,
+        onNewMessage: (UnsignedEvent) -> Unit,
         onEose: () -> Unit,
-        onNewMessage: (Event) -> Unit
     ) = coroutineScope {
         val now = Timestamp.now()
         val processedEvent = mutableSetOf<EventId>()
@@ -239,8 +241,7 @@ class Nostr {
                                     // Handle new message
                                     rumor?.createdAt()?.asSecs()?.let {
                                         if (it >= now.asSecs()) {
-                                            // TODO: only send unsigned event
+                                            onNewMessage(rumor)
-                                            onNewMessage(rumor.signWithKeys(Keys.generate()))
                                         }
                                     }
                                 } catch (e: Exception) {
@@ -281,7 +282,7 @@ class Nostr {
 
     private suspend fun getCachedRumor(giftId: EventId): UnsignedEvent? {
         try {
-            val filter = Filter().identifier(giftId.toBech32())
+            val filter = Filter().identifier(giftId.toHex())
             val event = client?.database()?.query(filter)?.first()
 
             return event?.content()?.let { UnsignedEvent.fromJson(it) }
@@ -292,18 +293,30 @@ class Nostr {
 
     private suspend fun setCachedRumor(giftId: EventId, rumor: UnsignedEvent) {
         try {
-            val rngKeys = Keys.generate()
+            val currentUser =
+                signer.currentUser ?: throw IllegalStateException("User not signed in")
 
             // Ensure the rumor ID is set
             val rumor = rumor.ensureId()
+            val roomId = rumor.roomId()
 
-            // Construct a reference event
+            // Construct reference tags
+            val tags = listOf(
+                Tag.identifier(giftId.toHex()),
+                Tag.event(rumor.id()!!),
+                Tag.reference(roomId.toString()),
+                Tag.custom(TagKind.Unknown("k"), listOf("dm"))
+            )
+
+            // Set event kind
             val kind = Kind.fromStd(KindStandard.APPLICATION_SPECIFIC_DATA);
-            val tags = listOf(Tag.identifier(giftId.toBech32()), Tag.event(rumor.id()!!))
+
-            val event = EventBuilder(kind, rumor.asJson()).tags(tags).signWithKeys(rngKeys)
+            val event = EventBuilder(kind, rumor.asJson())
+                .tags(tags)
+                .build(currentUser)
+                .signWithKeys(Keys.generate())
 
             client?.database()?.saveEvent(event)
-            client?.database()?.saveEvent(rumor.signWithKeys(rngKeys))
         } catch (e: Exception) {
             println("Failed to set cached rumor: ${e.message}")
         }
@@ -337,19 +350,6 @@ class Nostr {
         return null
     }
 
-    private fun conversationId(rumor: UnsignedEvent): Long {
-        val pubkeys: MutableList<PublicKey> = rumor.tags().publicKeys().toMutableList()
-        pubkeys.add(rumor.author())
-
-        val uniqueSortedKeys = pubkeys
-            .map { it.toHex() }
-            .distinct()
-            .sorted()
-
-        return uniqueSortedKeys.hashCode().toLong()
-    }
-
-
     private suspend fun getDefaultRelayList(): Map<RelayUrl, RelayMetadata> {
         // Construct a list of relays
         val relayList = mapOf<RelayUrl, RelayMetadata>(
@@ -466,21 +466,19 @@ class Nostr {
     suspend fun getChatRooms(): Set<Room>? {
         try {
             val userPubkey = signer.currentUser ?: throw IllegalStateException("User not signed in")
-            val kind = Kind.fromStd(KindStandard.PRIVATE_DIRECT_MESSAGE)
+            val kind = Kind.fromStd(KindStandard.APPLICATION_SPECIFIC_DATA)
+            val kTag = SingleLetterTag.lowercase(Alphabet.K)
 
             // Get all events sent by the user
-            val sendFilter = Filter().kind(kind).author(userPubkey)
+            val filter = Filter().kind(kind).author(userPubkey).customTag(kTag, "dm")
-            val sendEvents = client?.database()?.query(sendFilter);
+            val events = client?.database()?.query(filter)
 
-            // Get all events sent to the user
+            // Collect rooms
-            val recvFilter = Filter().kind(kind).pubkey(userPubkey)
-            val recvEvents = client?.database()?.query(recvFilter);
-
-            // Collect all events
-            val events = sendEvents?.merge(recvEvents!!)?.toVec();
             val rooms: MutableSet<Room> = mutableSetOf()
 
             events
+                ?.toVec()
+                ?.map { UnsignedEvent.fromJson(it.content()) }
                 ?.filter { it.tags().publicKeys().isNotEmpty() }
                 ?.sortedByDescending { it.createdAt().asSecs() }
                 ?.forEach { event ->
@@ -516,24 +514,17 @@ class Nostr {
         }
     }
 
-    suspend fun getChatRoomMessages(members: List<PublicKey>): List<Event> {
+    suspend fun getChatRoomMessages(roomId: Long): List<UnsignedEvent> {
         try {
-            val userPubkey = signer.currentUser ?: throw IllegalStateException("User not signed in")
+            val kind = Kind.fromStd(KindStandard.APPLICATION_SPECIFIC_DATA)
-            val kind = Kind.fromStd(KindStandard.PRIVATE_DIRECT_MESSAGE)
+            val filter = Filter().kind(kind).reference(roomId.toString())
-
+            val events = client?.database()?.query(filter)
-            val sendFilter = Filter().kind(kind).author(userPubkey).pubkeys(members)
-            val sendEvents = client?.database()?.query(sendFilter)
-
-            val recvFilter = Filter().kind(kind).authors(members).pubkey(userPubkey)
-            val recvEvents = client?.database()?.query(recvFilter)
 
             // Merge the events
-            val events = sendEvents
+            return events
-                ?.merge(recvEvents!!)
                 ?.toVec()
-                ?.sortedByDescending { it.createdAt().asSecs() }
+                ?.map { UnsignedEvent.fromJson(it.content()) }
-
+                ?.sortedByDescending { it.createdAt().asSecs() } ?: emptyList()
-            return events ?: emptyList()
         } catch (e: Exception) {
             throw IllegalStateException("Failed to get chat room messages: ${e.message}", e)
         }

shared/src/commonMain/kotlin/su/reya/coop/NostrViewModel.kt

@@ -17,13 +17,13 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import kotlinx.coroutines.withTimeoutOrNull
 import kotlinx.serialization.json.Json
-import rust.nostr.sdk.Event
 import rust.nostr.sdk.EventId
 import rust.nostr.sdk.Keys
 import rust.nostr.sdk.Metadata
 import rust.nostr.sdk.NostrConnect
 import rust.nostr.sdk.NostrConnectUri
 import rust.nostr.sdk.PublicKey
+import rust.nostr.sdk.UnsignedEvent
 import su.reya.coop.blossom.BlossomClient
 import su.reya.coop.storage.SecretStorage
 import kotlin.time.Clock
@@ -42,7 +42,7 @@ class NostrViewModel(
     private val _chatRooms = MutableStateFlow<Set<Room>>(emptySet())
     val chatRooms = _chatRooms.asStateFlow()
 
-    private val _newEvents = MutableSharedFlow<Event>(extraBufferCapacity = 100)
+    private val _newEvents = MutableSharedFlow<UnsignedEvent>(extraBufferCapacity = 100)
     val newEvents = _newEvents.asSharedFlow()
 
     private val _errorEvents = Channel<String>(Channel.BUFFERED)
@@ -302,12 +302,9 @@ class NostrViewModel(
         }
     }
 
-    suspend fun getChatRoomMessages(roomId: Long): List<Event> {
+    suspend fun getChatRoomMessages(roomId: Long): List<UnsignedEvent> {
         try {
-            val room = chatRooms.value.firstOrNull { it.id == roomId } ?: return emptyList()
+            return nostr.getChatRoomMessages(roomId)
-            val members = room.members
-
-            return nostr.getChatRoomMessages(members.toList())
         } catch (e: Exception) {
             showError("Error: ${e.message}")
         }

shared/src/commonMain/kotlin/su/reya/coop/Room.kt

@@ -5,10 +5,10 @@ import kotlinx.datetime.TimeZone
 import kotlinx.datetime.minus
 import kotlinx.datetime.number
 import kotlinx.datetime.toLocalDateTime
-import rust.nostr.sdk.Event
 import rust.nostr.sdk.PublicKey
 import rust.nostr.sdk.TagKind
 import rust.nostr.sdk.Timestamp
+import rust.nostr.sdk.UnsignedEvent
 import kotlin.time.Clock
 import kotlin.time.Instant
 
@@ -42,7 +42,7 @@ data class Room(
     }
 
     companion object {
-        fun new(rumor: Event, userPubkey: PublicKey): Room {
+        fun new(rumor: UnsignedEvent, userPubkey: PublicKey): Room {
             val id = rumor.roomId()
             val createdAt = rumor.createdAt()
             val subject = rumor.tags().find(TagKind.Subject)?.content()
@@ -86,7 +86,7 @@ data class Room(
     }
 }
 
-fun Event.roomId(): Long {
+fun UnsignedEvent.roomId(): Long {
     // Collect the author's public key and all public keys from tags
     val pubkeys: MutableList<PublicKey> = mutableListOf()
     pubkeys.add(this.author())