Capturing EOSE events and keeping messages within relay limits (10 subscriptions and 10 REQ events at a time)

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

@@ -51,7 +51,7 @@ class Note(val idHex: String) {
         this.mentions = mentions
         this.replyTo = replyTo
 
-        invalidateData(live)
+        live.invalidateData()
     }
 
     fun formattedDateTime(timestamp: Long): String {
@@ -83,22 +83,22 @@ class Note(val idHex: String) {
 
     fun addReply(note: Note) {
         if (replies.add(note))
-            invalidateData(liveReplies)
+            liveReplies.invalidateData()
     }
 
     fun addBoost(note: Note) {
         if (boosts.add(note))
-            invalidateData(liveBoosts)
+            liveBoosts.invalidateData()
     }
 
     fun addReaction(note: Note) {
         if (reactions.add(note))
-            invalidateData(liveReactions)
+            liveReactions.invalidateData()
     }
 
     fun addReport(note: Note) {
         if (reports.add(note))
-            invalidateData(liveReports)
+            liveReports.invalidateData()
     }
 
     fun isReactedBy(user: User): Boolean {
@@ -155,24 +155,24 @@ class Note(val idHex: String) {
     val liveBoosts: NoteLiveData = NoteLiveData(this)
     val liveReplies: NoteLiveData = NoteLiveData(this)
     val liveReports: NoteLiveData = NoteLiveData(this)
+}
 
+class NoteLiveData(val note: Note): LiveData<NoteState>(NoteState(note)) {
     // Refreshes observers in batches.
     var handlerWaiting = false
     @Synchronized
-    fun invalidateData(live: NoteLiveData) {
+    fun invalidateData() {
         if (handlerWaiting) return
 
         handlerWaiting = true
         val scope = CoroutineScope(Job() + Dispatchers.Default)
         scope.launch {
             delay(100)
-            live.refresh()
+            refresh()
             handlerWaiting = false
         }
     }
-}
 
-class NoteLiveData(val note: Note): LiveData<NoteState>(NoteState(note)) {
     fun refresh() {
         postValue(NoteState(note))
     }

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

@@ -43,6 +43,9 @@ class User(val pubkeyHex: String) {
     val reports = Collections.synchronizedSet(mutableSetOf<Note>())
     val relaysBeingUsed = Collections.synchronizedMap(mutableMapOf<String, RelayInfo>())
 
+    var latestMetadataRequestEOSE: Long? = null
+    var latestReportRequestEOSE: Long? = null
+
     fun toBestDisplayName(): String {
         return bestDisplayName() ?: bestUsername() ?: pubkeyDisplayHex
     }
@@ -64,8 +67,8 @@ class User(val pubkeyHex: String) {
         follows.add(user)
         user.followers.add(this)
 
-        invalidateData(liveFollows)
+        liveFollows.invalidateData()
-        user.invalidateData(liveFollows)
+        user.liveFollows.invalidateData()
 
         listeners.forEach {
             it.onFollowsChange()
@@ -75,8 +78,8 @@ class User(val pubkeyHex: String) {
         follows.remove(user)
         user.followers.remove(this)
 
-        invalidateData(liveFollows)
+        liveFollows.invalidateData()
-        user.invalidateData(liveFollows)
+        user.liveFollows.invalidateData()
 
         updateSubscribers {
             it.onFollowsChange()
@@ -91,7 +94,7 @@ class User(val pubkeyHex: String) {
     fun addReport(note: Note) {
         if (reports.add(note)) {
             updateSubscribers { it.onNewReports() }
-            invalidateData(liveReports)
+            liveReports.invalidateData()
         }
     }
 
@@ -118,7 +121,7 @@ class User(val pubkeyHex: String) {
 
     fun addMessage(user: User, msg: Note) {
         getOrCreateChannel(user).add(msg)
-        invalidateData(liveMessages)
+        liveMessages.invalidateData()
         updateSubscribers { it.onNewMessage() }
     }
 
@@ -140,7 +143,7 @@ class User(val pubkeyHex: String) {
         }
 
         updateSubscribers { it.onNewRelayInfo() }
-        invalidateData(liveRelayInfo)
+        liveRelayInfo.invalidateData()
     }
 
     fun updateFollows(newFollows: Set<User>, updateAt: Long) {
@@ -168,14 +171,14 @@ class User(val pubkeyHex: String) {
             }
         }
 
-        invalidateData(liveRelays)
+        liveRelays.invalidateData()
     }
 
     fun updateUserInfo(newUserInfo: UserMetadata, updateAt: Long) {
         info = newUserInfo
         updatedMetadataAt = updateAt
 
-        invalidateData(liveMetadata)
+        liveMetadata.invalidateData()
     }
 
     fun isFollowing(user: User): Boolean {
@@ -248,21 +251,6 @@ class User(val pubkeyHex: String) {
     val liveRelays: UserLiveData = UserLiveData(this)
     val liveRelayInfo: UserLiveData = UserLiveData(this)
     val liveMetadata: UserLiveData = UserLiveData(this)
-
-    // Refreshes observers in batches.
-    var handlerWaiting = false
-    @Synchronized
-    fun invalidateData(live: UserLiveData) {
-        if (handlerWaiting) return
-
-        handlerWaiting = true
-        val scope = CoroutineScope(Job() + Dispatchers.Main)
-        scope.launch {
-            delay(100)
-            live.refresh()
-            handlerWaiting = false
-        }
-    }
 }
 
 class UserMetadata {
@@ -291,7 +279,23 @@ class UserMetadata {
 }
 
 class UserLiveData(val user: User): LiveData<UserState>(UserState(user)) {
-    fun refresh() {
+
+    // Refreshes observers in batches.
+    var handlerWaiting = false
+    @Synchronized
+    fun invalidateData() {
+        if (handlerWaiting) return
+
+        handlerWaiting = true
+        val scope = CoroutineScope(Job() + Dispatchers.Main)
+        scope.launch {
+            delay(100)
+            refresh()
+            handlerWaiting = false
+        }
+    }
+
+    private fun refresh() {
         postValue(UserState(user))
     }
 

app/src/main/java/com/vitorpamplona/amethyst/service/Channel.kt

@@ -4,12 +4,12 @@ import java.util.UUID
 import nostr.postr.JsonFilter
 
 data class Channel (
-  val id: String = UUID.randomUUID().toString().substring(0,4)
+  val id: String = UUID.randomUUID().toString().substring(0,4),
+  val onEOSE: ((Long) -> Unit)? = null
 ) {
   var filter: List<JsonFilter>? = null // Inactive when null
-  private var lastEOSE: Long? = null
 
   fun updateEOSE(l: Long) {
-    lastEOSE = l
+    onEOSE?.let { it(l) }
   }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrAccountDataSource.kt

@@ -17,7 +17,7 @@ object NostrAccountDataSource: NostrDataSource<Note>("AccountData") {
     return JsonFilter(
       kinds = listOf(ContactListEvent.kind),
       authors = listOf(account.userProfile().pubkeyHex),
-      limit = 5
+      limit = 1
     )
   }
 
@@ -25,12 +25,16 @@ object NostrAccountDataSource: NostrDataSource<Note>("AccountData") {
     return JsonFilter(
       kinds = listOf(MetadataEvent.kind),
       authors = listOf(account.userProfile().pubkeyHex),
-      limit = 5
+      limit = 1
     )
   }
 
-  val accountMetadataChannel = requestNewChannel()
+  fun createNotificationFilter() = JsonFilter(
-  val accountContactListChannel = requestNewChannel()
+    tags = mapOf("p" to listOf(account.userProfile().pubkeyHex)),
+    limit = 100
+  )
+
+  val accountChannel = requestNewChannel()
 
   override fun feed(): List<Note> {
     val user = account.userProfile()
@@ -49,10 +53,10 @@ object NostrAccountDataSource: NostrDataSource<Note>("AccountData") {
 
   override fun updateChannelFilters() {
     // gets everthing about the user logged in
-    val newAccountMetadataFilter = createAccountMetadataFilter()
+    accountChannel.filter = listOf(
-    accountMetadataChannel.filter = listOf(newAccountMetadataFilter).ifEmpty { null }
+      createAccountMetadataFilter(),
-
+      createAccountContactListFilter(),
-    val newAccountContactListEvent = createAccountContactListFilter()
+      createNotificationFilter()
-    accountContactListChannel.filter = listOf(newAccountContactListEvent).ifEmpty { null }
+    ).ifEmpty { null }
   }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrChatRoomDataSource.kt

@@ -28,8 +28,7 @@ object NostrChatRoomDataSource: NostrDataSource<Note>("ChatroomFeed") {
     tags = withUser?.let { mapOf("p" to listOf(it.pubkeyHex)) }
   )
 
-  val incomingChannel = requestNewChannel()
+  val inandoutChannel = requestNewChannel()
-  val outgoingChannel = requestNewChannel()
 
   // returns the last Note of each user.
   override fun feed(): List<Note> {
@@ -43,7 +42,6 @@ object NostrChatRoomDataSource: NostrDataSource<Note>("ChatroomFeed") {
   }
 
   override fun updateChannelFilters() {
-    incomingChannel.filter = listOf(createMessagesToMeFilter()).ifEmpty { null }
+    inandoutChannel.filter = listOf(createMessagesToMeFilter(), createMessagesFromMeFilter()).ifEmpty { null }
-    outgoingChannel.filter = listOf(createMessagesFromMeFilter()).ifEmpty { null }
   }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrChatroomListDataSource.kt

@@ -52,14 +52,7 @@ object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
     }
   }
 
-  val incomingChannel = requestNewChannel()
+  val chatroomListChannel = requestNewChannel()
-  val outgoingChannel = requestNewChannel()
-
-  val myChannelsChannel = requestNewChannel()
-  val myChannelsInfoChannel = requestNewChannel()
-  val myChannelsMessagesChannel = requestNewChannel()
-
-  val myChannelsCreatedbyMeChannel = requestNewChannel()
 
   // returns the last Note of each user.
   override fun feed(): List<Note> {
@@ -85,12 +78,16 @@ object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
   }
 
   override fun updateChannelFilters() {
-    incomingChannel.filter = listOf(createMessagesToMeFilter()).ifEmpty { null }
+    val list = listOf(
-    outgoingChannel.filter = listOf(createMessagesFromMeFilter()).ifEmpty { null }
+      createMessagesToMeFilter(),
-    myChannelsChannel.filter = listOf(createMyChannelsFilter()).ifEmpty { null }
+      createMessagesFromMeFilter(),
-    myChannelsInfoChannel.filter = createLastChannelInfoFilter().ifEmpty { null }
+      createMyChannelsFilter()
-    myChannelsMessagesChannel.filter = createLastMessageOfEachChannelFilter().ifEmpty { null }
+    )
 
-    //myChannelsCreatedbyMeChannel.filter = listOf(createChannelsCreatedbyMeFilter()).ifEmpty { null }
+    chatroomListChannel.filter = listOfNotNull(
+      list,
+      createLastChannelInfoFilter(),
+      createLastMessageOfEachChannelFilter()
+    ).flatten().ifEmpty { null }
   }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrDataSource.kt

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.service
 
 import android.os.Handler
 import android.os.Looper
+import android.util.Log
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.UrlCachedPreviewer
@@ -88,7 +89,7 @@ abstract class NostrDataSource<T>(val debugName: String) {
     }
 
     override fun onError(error: Error, subscriptionId: String, relay: Relay) {
-      //Log.e("ERROR", "Relay ${relay.url}: ${error.message}")
+      Log.e("ERROR", "Relay ${relay.url}: ${error.message}")
     }
 
     override fun onRelayStateChange(type: Relay.Type, relay: Relay, channel: String?) {
@@ -145,8 +146,8 @@ abstract class NostrDataSource<T>(val debugName: String) {
     }
   }
 
-  fun requestNewChannel(): Channel {
+  fun requestNewChannel(onEOSE: ((Long) -> Unit)? = null): Channel {
-    val newChannel = Channel(debugName+UUID.randomUUID().toString().substring(0,4))
+    val newChannel = Channel(debugName+UUID.randomUUID().toString().substring(0,4), onEOSE)
     channels.add(newChannel)
     channelIds.add(newChannel.id)
     return newChannel

app/src/main/java/com/vitorpamplona/amethyst/service/NostrHomeDataSource.kt

@@ -4,11 +4,7 @@ import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
-import com.vitorpamplona.amethyst.model.UserState
 import com.vitorpamplona.amethyst.service.model.RepostEvent
-import com.vitorpamplona.amethyst.service.relays.Client
-import com.vitorpamplona.amethyst.service.relays.Relay
-import com.vitorpamplona.amethyst.service.relays.RelayPool
 import nostr.postr.JsonFilter
 import nostr.postr.events.TextNoteEvent
 import nostr.postr.toHex

app/src/main/java/com/vitorpamplona/amethyst/service/NostrNotificationDataSource.kt

@@ -12,13 +12,6 @@ import nostr.postr.JsonFilter
 object NostrNotificationDataSource: NostrDataSource<Note>("NotificationFeed") {
   lateinit var account: Account
 
-  fun createNotificationFilter() = JsonFilter(
-    tags = mapOf("p" to listOf(account.userProfile().pubkeyHex)),
-    limit = 100
-  )
-
-  val notificationChannel = requestNewChannel()
-
   override fun feed(): List<Note> {
     val set = account.userProfile().taggedPosts
     val filtered = synchronized(set) {
@@ -31,7 +24,5 @@ object NostrNotificationDataSource: NostrDataSource<Note>("NotificationFeed") {
     }.sortedBy { it.event?.createdAt }.reversed()
   }
 
-  override fun updateChannelFilters() {
+  override fun updateChannelFilters() {}
-    notificationChannel.filter = listOf(createNotificationFilter()).ifEmpty { null }
-  }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrSingleChannelDataSource.kt

@@ -46,8 +46,7 @@ object NostrSingleChannelDataSource: NostrDataSource<Note>("SingleChannelFeed")
     )
   }
 
-  val repliesAndReactionsChannel = requestNewChannel()
+  val singleChannelChannel = requestNewChannel()
-  val loadEventsChannel = requestNewChannel()
 
   override fun feed(): List<Note> {
     return emptyList()
@@ -57,8 +56,7 @@ object NostrSingleChannelDataSource: NostrDataSource<Note>("SingleChannelFeed")
     val reactions = createRepliesAndReactionsFilter()
     val missing = createLoadEventsIfNotLoadedFilter()
 
-    repliesAndReactionsChannel.filter = listOfNotNull(reactions).ifEmpty { null }
+    singleChannelChannel.filter = listOfNotNull(reactions, missing).ifEmpty { null }
-    loadEventsChannel.filter = listOfNotNull(missing).ifEmpty { null }
   }
 
   fun add(eventId: String) {

app/src/main/java/com/vitorpamplona/amethyst/service/NostrSingleEventDataSource.kt

@@ -60,8 +60,7 @@ object NostrSingleEventDataSource: NostrDataSource<Note>("SingleEventFeed") {
     )
   }
 
-  val repliesAndReactionsChannel = requestNewChannel()
+  val singleEventChannel = requestNewChannel()
-  val loadEventsChannel = requestNewChannel()
 
   override fun feed(): List<Note> {
     return synchronized(eventsToWatch) {
@@ -75,8 +74,7 @@ object NostrSingleEventDataSource: NostrDataSource<Note>("SingleEventFeed") {
     val reactions = createRepliesAndReactionsFilter()
     val missing = createLoadEventsIfNotLoadedFilter()
 
-    repliesAndReactionsChannel.filter = listOfNotNull(reactions).ifEmpty { null }
+    singleEventChannel.filter = listOfNotNull(reactions, missing).ifEmpty { null }
-    loadEventsChannel.filter = listOfNotNull(missing).ifEmpty { null }
   }
 
   fun add(eventId: String) {

app/src/main/java/com/vitorpamplona/amethyst/service/NostrSingleUserDataSource.kt

@@ -34,8 +34,11 @@ object NostrSingleUserDataSource: NostrDataSource<User>("SingleUserFeed") {
     }
   }
 
-  val userChannel = requestNewChannel()
+  val userChannel = requestNewChannel(){
-  val userReportChannel = requestNewChannel()
+    // Many relays operate with limits in the amount of filters.
+    // As information comes, the filters will be rotated to get more data.
+    invalidateFilters()
+  }
 
   override fun feed(): List<User> {
     return synchronized(usersToWatch) {
@@ -46,8 +49,7 @@ object NostrSingleUserDataSource: NostrDataSource<User>("SingleUserFeed") {
   }
 
   override fun updateChannelFilters() {
-    userChannel.filter = createUserFilter()
+    userChannel.filter = listOfNotNull(createUserFilter()).flatten()
-    userReportChannel.filter = createUserReportFilter()
   }
 
   fun add(userId: String) {

app/src/main/java/com/vitorpamplona/amethyst/service/NostrThreadDataSource.kt

@@ -43,7 +43,6 @@ object NostrThreadDataSource: NostrDataSource<Note>("SingleThreadFeed") {
     )
   }
 
-  val repliesAndReactionsChannel = requestNewChannel()
   val loadEventsChannel = requestNewChannel()
 
   override fun feed(): List<Note> {
@@ -55,8 +54,7 @@ object NostrThreadDataSource: NostrDataSource<Note>("SingleThreadFeed") {
   }
 
   override fun updateChannelFilters() {
-    repliesAndReactionsChannel.filter = listOfNotNull(createRepliesAndReactionsFilter()).ifEmpty { null }
+    loadEventsChannel.filter = listOfNotNull(createLoadEventsIfNotLoadedFilter(), createRepliesAndReactionsFilter()).ifEmpty { null }
-    loadEventsChannel.filter = listOfNotNull(createLoadEventsIfNotLoadedFilter()).ifEmpty { null }
   }
 
   fun searchRoot(note: Note, testedNotes: MutableSet<Note> = mutableSetOf()): Note? {

app/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileDataSource.kt

@@ -6,6 +6,7 @@ import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.model.toByteArray
 import nostr.postr.JsonFilter
+import nostr.postr.events.ContactListEvent
 import nostr.postr.events.MetadataEvent
 import nostr.postr.events.TextNoteEvent
 
@@ -34,8 +35,20 @@ object NostrUserProfileDataSource: NostrDataSource<Note>("UserProfileFeed") {
     )
   }
 
+  fun createFollowFilter(): JsonFilter {
+    return JsonFilter(
+      kinds = listOf(ContactListEvent.kind),
+      authors = listOf(user!!.pubkeyHex),
+      limit = 1
+    )
+  }
+
+  fun createFollowersFilter() = JsonFilter(
+    kinds = listOf(ContactListEvent.kind),
+    tags = mapOf("p" to listOf(user!!.pubkeyHex))
+  )
+
   val userInfoChannel = requestNewChannel()
-  val notesChannel = requestNewChannel()
 
   override fun feed(): List<Note> {
     val notes = user?.notes ?: return emptyList()
@@ -46,7 +59,11 @@ object NostrUserProfileDataSource: NostrDataSource<Note>("UserProfileFeed") {
   }
 
   override fun updateChannelFilters() {
-    userInfoChannel.filter = listOf(createUserInfoFilter()).ifEmpty { null }
+    userInfoChannel.filter = listOf(
-    notesChannel.filter = listOf(createUserPostsFilter()).ifEmpty { null }
+      createUserInfoFilter(),
+      createUserPostsFilter(),
+      createFollowFilter(),
+      createFollowersFilter()
+    ).ifEmpty { null }
   }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileFollowersDataSource.kt

@@ -15,13 +15,6 @@ object NostrUserProfileFollowersDataSource: NostrDataSource<User>("UserProfileFo
     resetFilters()
   }
 
-  fun createFollowersFilter() = JsonFilter(
-    kinds = listOf(ContactListEvent.kind),
-    tags = mapOf("p" to listOf(user!!.pubkeyHex))
-  )
-
-  val followerChannel = requestNewChannel()
-
   override fun feed(): List<User> {
     val followers = user?.followers ?: emptyList()
 
@@ -30,7 +23,5 @@ object NostrUserProfileFollowersDataSource: NostrDataSource<User>("UserProfileFo
     }
   }
 
-  override fun updateChannelFilters() {
+  override fun updateChannelFilters() {}
-    followerChannel.filter = listOf(createFollowersFilter()).ifEmpty { null }
-  }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileFollowsDataSource.kt

@@ -15,16 +15,6 @@ object NostrUserProfileFollowsDataSource: NostrDataSource<User>("UserProfileFoll
     resetFilters()
   }
 
-  fun createFollowFilter(): JsonFilter {
-    return JsonFilter(
-      kinds = listOf(ContactListEvent.kind),
-      authors = listOf(user!!.pubkeyHex),
-      limit = 1
-    )
-  }
-
-  val followChannel = requestNewChannel()
-
   override fun feed(): List<User> {
     val follows = user?.follows ?: emptyList()
 
@@ -33,7 +23,5 @@ object NostrUserProfileFollowsDataSource: NostrDataSource<User>("UserProfileFoll
     }
   }
 
-  override fun updateChannelFilters() {
+  override fun updateChannelFilters() {}
-    followChannel.filter = listOf(createFollowFilter()).ifEmpty { null }
-  }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/relays/Relay.kt

@@ -143,7 +143,7 @@ class Relay(
                 val filters = Client.getSubscriptionFilters(requestId)
                 if (filters.isNotEmpty()) {
                     val request =
-                        """["REQ","$requestId",${filters.joinToString(",") { it.toJson() }}]"""
+                        """["REQ","$requestId",${filters.take(10).joinToString(",") { it.toJson() }}]"""
                     //println("FILTERSSENT ${url} " + """["REQ","$requestId",${filters.joinToString(",") { it.toJson() }}]""")
                     socket?.send(request)
                 }

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/HomeScreen.kt

@@ -9,14 +9,9 @@ import androidx.compose.material.TabRow
 import androidx.compose.material.TabRowDefaults
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.livedata.observeAsState
-import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import androidx.navigation.NavController
@@ -24,15 +19,8 @@ import com.google.accompanist.pager.ExperimentalPagerApi
 import com.google.accompanist.pager.HorizontalPager
 import com.google.accompanist.pager.pagerTabIndicatorOffset
 import com.google.accompanist.pager.rememberPagerState
-import com.vitorpamplona.amethyst.NotificationCache
-import com.vitorpamplona.amethyst.service.NostrHomeDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileFollowersDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileFollowsDataSource
 import com.vitorpamplona.amethyst.ui.navigation.Route
-import com.vitorpamplona.amethyst.ui.navigation.Routes
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
-import java.lang.System.currentTimeMillis
 import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalPagerApi::class)