Migrates Account management to an Application class.

amethyst/src/main/java/com/vitorpamplona/amethyst/Amethyst.kt

@@ -26,7 +26,10 @@ import android.util.Log
 import androidx.security.crypto.EncryptedSharedPreferences
 import coil3.disk.DiskCache
 import coil3.memory.MemoryCache
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.AccountSettings
 import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.accountsCache.AccountCacheState
 import com.vitorpamplona.amethyst.service.connectivity.ConnectivityManager
 import com.vitorpamplona.amethyst.service.crashreports.CrashReportCache
 import com.vitorpamplona.amethyst.service.crashreports.UnexpectedCrashSaver
@@ -49,10 +52,15 @@ import com.vitorpamplona.amethyst.service.relayClient.notifyCommand.model.Notify
 import com.vitorpamplona.amethyst.service.relayClient.reqCommand.RelaySubscriptionsCoordinator
 import com.vitorpamplona.amethyst.service.relayClient.speedLogger.RelaySpeedLogger
 import com.vitorpamplona.amethyst.service.uploads.nip95.Nip95CacheFactory
+import com.vitorpamplona.amethyst.ui.navigation.navs.EmptyNav.scope
 import com.vitorpamplona.amethyst.ui.tor.TorManager
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.core.toHexKey
 import com.vitorpamplona.quartz.nip01Core.relay.client.NostrClient
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSignerInternal
 import com.vitorpamplona.quartz.nip03Timestamp.VerificationStateCache
 import com.vitorpamplona.quartz.nip03Timestamp.ots.okhttp.OtsBlockHeightCache
+import com.vitorpamplona.quartz.nip55AndroidSigner.client.NostrSignerExternal
 import kotlinx.coroutines.CoroutineExceptionHandler
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -153,6 +161,15 @@ class Amethyst : Application() {
     // Coordinates all subscriptions for the Nostr Client
     val sources: RelaySubscriptionsCoordinator = RelaySubscriptionsCoordinator(LocalCache, client, applicationIOScope)
 
+    val accountsCache =
+        AccountCacheState(
+            geolocationFlow = locationManager.geohashStateFlow,
+            nwcFilterAssembler = sources.nwc,
+            cache = cache,
+            client = client,
+            scope = applicationIOScope,
+        )
+
     // saves the .content of NIP-95 blobs in disk to save memory
     val nip95cache: File by lazy { Nip95CacheFactory.new(this) }
 
@@ -225,6 +242,31 @@ class Amethyst : Application() {
         }
     }
 
+    fun loadAccount(accountSettings: AccountSettings): Account {
+        val keyPair = accountSettings.keyPair
+        return accountsCache.loadAccount(
+            signer =
+                if (keyPair.privKey != null) {
+                    NostrSignerInternal(keyPair)
+                } else {
+                    when (val packageName = accountSettings.externalSignerPackageName) {
+                        null -> NostrSignerInternal(keyPair)
+                        else ->
+                            NostrSignerExternal(
+                                pubKey = keyPair.pubKey.toHexKey(),
+                                packageName = packageName,
+                                contentResolver = contentResolver,
+                            )
+                    }
+                },
+            accountSettings = accountSettings,
+        )
+    }
+
+    fun removeAccount(pubkey: HexKey) {
+        accountsCache.removeAccount(pubkey)
+    }
+
     companion object {
         lateinit var instance: Amethyst
             private set

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

@@ -20,7 +20,6 @@
  */
 package com.vitorpamplona.amethyst.model
 
-import android.content.ContentResolver
 import androidx.compose.runtime.Stable
 import com.vitorpamplona.amethyst.ui.actions.mediaServers.DEFAULT_MEDIA_SERVERS
 import com.vitorpamplona.amethyst.ui.actions.mediaServers.ServerName
@@ -29,10 +28,8 @@ import com.vitorpamplona.amethyst.ui.tor.TorSettings
 import com.vitorpamplona.amethyst.ui.tor.TorSettingsFlow
 import com.vitorpamplona.quartz.experimental.ephemChat.list.EphemeralChatListEvent
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
-import com.vitorpamplona.quartz.nip01Core.core.toHexKey
 import com.vitorpamplona.quartz.nip01Core.crypto.KeyPair
 import com.vitorpamplona.quartz.nip01Core.metadata.MetadataEvent
-import com.vitorpamplona.quartz.nip01Core.signers.NostrSignerInternal
 import com.vitorpamplona.quartz.nip02FollowList.ContactListEvent
 import com.vitorpamplona.quartz.nip17Dm.settings.ChatMessageRelayListEvent
 import com.vitorpamplona.quartz.nip28PublicChat.list.ChannelListEvent
@@ -49,7 +46,6 @@ import com.vitorpamplona.quartz.nip51Lists.relayLists.BlockedRelayListEvent
 import com.vitorpamplona.quartz.nip51Lists.relayLists.TrustedRelayListEvent
 import com.vitorpamplona.quartz.nip55AndroidSigner.api.CommandType
 import com.vitorpamplona.quartz.nip55AndroidSigner.api.permission.Permission
-import com.vitorpamplona.quartz.nip55AndroidSigner.client.NostrSignerExternal
 import com.vitorpamplona.quartz.nip57Zaps.LnZapEvent
 import com.vitorpamplona.quartz.nip65RelayList.AdvertisedRelayListEvent
 import com.vitorpamplona.quartz.nip65RelayList.tags.AdvertisedRelayInfo
@@ -154,21 +150,6 @@ class AccountSettings(
 
     fun isWriteable(): Boolean = keyPair.privKey != null || externalSignerPackageName != null
 
-    fun createSigner(contentResolver: ContentResolver) =
-        if (keyPair.privKey != null) {
-            NostrSignerInternal(keyPair)
-        } else {
-            when (val packageName = externalSignerPackageName) {
-                null -> NostrSignerInternal(keyPair)
-                else ->
-                    NostrSignerExternal(
-                        pubKey = keyPair.pubKey.toHexKey(),
-                        packageName = packageName,
-                        contentResolver = contentResolver,
-                    )
-            }
-        }
-
     // ---
     // Zaps and Reactions
     // ---

amethyst/src/main/java/com/vitorpamplona/amethyst/model/accountsCache/AccountCacheState.kt

@@ -0,0 +1,65 @@
+/**
+ * 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.model.accountsCache
+
+import androidx.collection.LruCache
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.AccountSettings
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.service.location.LocationState
+import com.vitorpamplona.amethyst.service.relayClient.reqCommand.nwc.NWCPaymentFilterAssembler
+import com.vitorpamplona.quartz.nip01Core.core.HexKey
+import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
+import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.StateFlow
+
+class AccountCacheState(
+    val geolocationFlow: StateFlow<LocationState.LocationResult>,
+    val nwcFilterAssembler: NWCPaymentFilterAssembler,
+    val cache: LocalCache,
+    val client: INostrClient,
+    val scope: CoroutineScope,
+) {
+    val accounts = LruCache<HexKey, Account>(20)
+
+    fun removeAccount(pubkey: HexKey) = accounts.remove(pubkey)
+
+    fun loadAccount(
+        signer: NostrSigner,
+        accountSettings: AccountSettings,
+    ): Account {
+        val cached = accounts[signer.pubKey]
+        if (cached != null) return cached
+
+        return Account(
+            settings = accountSettings,
+            signer = signer,
+            geolocationFlow = geolocationFlow,
+            nwcFilterAssembler = nwcFilterAssembler,
+            cache = cache,
+            client = client,
+            scope = scope,
+        ).also {
+            accounts.put(signer.pubKey, it)
+        }
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/EventNotificationConsumer.kt

@@ -24,6 +24,7 @@ import android.app.NotificationManager
 import android.content.Context
 import android.util.Log
 import androidx.core.content.ContextCompat
+import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.AccountSettings
@@ -81,12 +82,11 @@ class EventNotificationConsumer(
 
     private suspend fun consumeIfMatchesAccount(
         pushWrappedEvent: GiftWrapEvent,
-        account: AccountSettings,
+        accountSettings: AccountSettings,
     ) {
-        val signer = account.createSigner(applicationContext.contentResolver)
+        val account = Amethyst.instance.loadAccount(accountSettings)
-
+        val notificationEvent = pushWrappedEvent.unwrapThrowing(account.signer)
-        val notificationEvent = pushWrappedEvent.unwrapThrowing(signer)
+        consumeNotificationEvent(notificationEvent, account.signer, accountSettings)
-        consumeNotificationEvent(notificationEvent, signer, account)
     }
 
     suspend fun consumeNotificationEvent(
@@ -124,11 +124,11 @@ class EventNotificationConsumer(
         var matchAccount = false
         LocalPreferences.allSavedAccounts().forEach {
             if (!matchAccount && (it.hasPrivKey || it.loggedInWithExternalSigner) && it.npub in npubs) {
-                LocalPreferences.loadCurrentAccountFromEncryptedStorage(it.npub)?.let { acc ->
+                LocalPreferences.loadCurrentAccountFromEncryptedStorage(it.npub)?.let { accountSettings ->
                     Log.d(TAG, "New Notification Testing if for ${it.npub}")
                     try {
-                        val signer = acc.createSigner(applicationContext.contentResolver)
+                        val account = Amethyst.instance.loadAccount(accountSettings)
-                        consumeNotificationEvent(event, signer, acc)
+                        consumeNotificationEvent(event, account.signer, accountSettings)
                         matchAccount = true
                     } catch (e: Exception) {
                         if (e is CancellationException) throw e

amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/RegisterAccounts.kt

@@ -59,8 +59,8 @@ class RegisterAccounts(
         }
 
         return mapNotNullAsync(remainingTos) { info ->
-            val signer = info.accountSettings.createSigner(Amethyst.instance.contentResolver)
+            val account = Amethyst.instance.loadAccount(info.accountSettings)
-            RelayAuthEvent.create(info.relays, notificationToken, signer)
+            RelayAuthEvent.create(info.relays, notificationToken, account.signer)
         }
     }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/AccountScreen.kt

@@ -95,7 +95,7 @@ fun LoggedInSetup(
 ) {
     SetAccountCentricViewModelStore(state) {
         LoggedInPage(
-            state.accountSettings,
+            state.account,
             state.route,
             accountStateViewModel,
             sharedPreferencesViewModel,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/AccountState.kt

@@ -26,7 +26,7 @@ import androidx.compose.runtime.Stable
 import androidx.lifecycle.ViewModelStore
 import androidx.lifecycle.ViewModelStoreOwner
 import androidx.lifecycle.viewmodel.compose.LocalViewModelStoreOwner
-import com.vitorpamplona.amethyst.model.AccountSettings
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.ui.navigation.routes.Route
 
 sealed class AccountState {
@@ -36,7 +36,7 @@ sealed class AccountState {
 
     @Stable
     class LoggedIn(
-        val accountSettings: AccountSettings,
+        val account: Account,
         var route: Route? = null,
     ) : AccountState() {
         val currentViewModelStore = AccountCentricViewModelStore()

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/AccountStateViewModel.kt

@@ -184,7 +184,9 @@ class AccountStateViewModel : ViewModel() {
         accountSettings: AccountSettings,
         route: Route? = null,
     ) = withContext(Dispatchers.Main) {
-        _accountContent.update { AccountState.LoggedIn(accountSettings, route) }
+        _accountContent.update {
+            AccountState.LoggedIn(Amethyst.instance.loadAccount(accountSettings), route)
+        }
 
         collectorJob?.cancel()
         collectorJob =
@@ -376,7 +378,8 @@ class AccountStateViewModel : ViewModel() {
     fun currentAccountNPub() =
         when (val state = _accountContent.value) {
             is AccountState.LoggedIn ->
-                state.accountSettings.keyPair.pubKey
+                state.account.signer.pubKey
+                    .hexToByteArray()
                     .toNpub()
             else -> null
         }
@@ -387,10 +390,12 @@ class AccountStateViewModel : ViewModel() {
                 // log off and relogin with the 0 account
                 prepareLogoutOrSwitch()
                 LocalPreferences.deleteAccount(accountInfo)
+                Amethyst.instance.removeAccount(accountInfo.npub.bechToBytes().toHexKey())
                 loginWithDefaultAccount()
             } else {
                 // delete without switching logins
                 LocalPreferences.deleteAccount(accountInfo)
+                Amethyst.instance.removeAccount(accountInfo.npub.bechToBytes().toHexKey())
             }
         }
     }

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

@@ -33,6 +33,7 @@ import androidx.core.net.toUri
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
 import coil3.asDrawable
 import coil3.imageLoader
 import coil3.request.ImageRequest
@@ -1725,9 +1726,9 @@ fun mockAccountViewModel(): AccountViewModel {
         )
 
     return AccountViewModel(
-        sharedPreferencesViewModel.sharedPrefs,
-        Amethyst(),
         account = account,
+        settings = sharedPreferencesViewModel.sharedPrefs,
+        app = Amethyst(),
     ).also {
         mockedCache = it
     }
@@ -1765,9 +1766,9 @@ fun mockVitorAccountViewModel(): AccountViewModel {
         )
 
     return AccountViewModel(
-        sharedPreferencesViewModel.sharedPrefs,
-        Amethyst(),
         account = account,
+        settings = sharedPreferencesViewModel.sharedPrefs,
+        app = Amethyst(),
     ).also {
         vitorCache = it
     }

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

@@ -42,7 +42,7 @@ import com.google.accompanist.permissions.rememberPermissionState
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.R
-import com.vitorpamplona.amethyst.model.AccountSettings
+import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.service.notifications.PushNotificationUtils
 import com.vitorpamplona.amethyst.service.relayClient.authCommand.compose.RelayAuthSubscription
 import com.vitorpamplona.amethyst.service.relayClient.reqCommand.account.AccountFilterAssemblerSubscription
@@ -59,7 +59,7 @@ import kotlinx.coroutines.launch
 
 @Composable
 fun LoggedInPage(
-    accountSettings: AccountSettings,
+    account: Account,
     route: Route?,
     accountStateViewModel: AccountStateViewModel,
     sharedPreferencesViewModel: SharedPreferencesViewModel,
@@ -69,9 +69,9 @@ fun LoggedInPage(
             key = "AccountViewModel",
             factory =
                 AccountViewModel.Factory(
-                    accountSettings,
+                    account = account,
-                    sharedPreferencesViewModel.sharedPrefs,
+                    settings = sharedPreferencesViewModel.sharedPrefs,
-                    Amethyst.instance,
+                    app = Amethyst.instance,
                 ),
         )