v0.70.7

add a button to return to default relay list

README.md

@@ -41,7 +41,7 @@ height="80">](https://github.com/vitorpamplona/amethyst/releases)
 - [x] URI Support (NIP-21)
 - [x] Created_at Limits (NIP-22)
 - [x] Event Deletion (NIP-09)
-- [x] Identity Verification (NIP-05)
+- [x] Nostr Address (NIP-05)
 - [x] Long-form Content (NIP-23)
 - [x] Parameterized Replaceable Events (NIP-33)
 - [x] Online Relay Search (NIP-50)

app/build.gradle

@@ -13,14 +13,14 @@ android {
         applicationId "com.vitorpamplona.amethyst"
         minSdk 26
         targetSdk 33
-        versionCode 251
-        versionName "0.68.3"
+        versionCode 264
+        versionName "0.70.7"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
             useSupportLibrary true
         }
-        resConfigs("ar", "cs", "eo", "es", "fa", "fr", "hu", "night", "nl", "pt-rBR", "ru", "sv-rSE", "ta", "tr", "uk", "zh", "sh-rHK", "zh-rTW", "ja")
+        resConfigs("ar", "cs", "de", "eo", "es", "fa", "fr", "hu", "night", "nl", "pt-rBR", "ru", "sv-rSE", "ta", "tr", "uk", "zh", "sh-rHK", "zh-rTW", "ja")
     }
 
     buildTypes {
@@ -110,7 +110,7 @@ dependencies {
     implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-livedata:$lifecycle_version"
 
-    implementation 'net.engawapg.lib:zoomable:1.4.2'
+    implementation "net.engawapg.lib:zoomable:1.4.3"
 
     // Biometrics
     implementation "androidx.biometric:biometric-ktx:1.2.0-alpha05"
@@ -118,13 +118,6 @@ dependencies {
     // Bitcoin secp256k1 bindings to Android
     implementation 'fr.acinq.secp256k1:secp256k1-kmp-jni-android:0.10.1'
 
-    // Nostr Base Protocol
-    implementation('com.github.vitorpamplona.NostrPostr:nostrpostrlib:master-SNAPSHOT') {
-        exclude group:'fr.acinq.secp256k1'
-        exclude module: 'guava'
-        exclude module: 'guava-testlib'
-    }
-
     // Websockets API
     implementation 'com.squareup.okhttp3:okhttp:5.0.0-alpha.11'
 
@@ -139,9 +132,9 @@ dependencies {
     implementation 'androidx.security:security-crypto-ktx:1.1.0-alpha06'
 
     // view videos
-    implementation "com.google.android.exoplayer:exoplayer:${exoplayer_version}"
+    implementation "androidx.media3:media3-exoplayer:${exoplayer_version}"
     // important for proxy / tor
-    implementation "com.google.android.exoplayer:extension-okhttp:${exoplayer_version}"
+    implementation "androidx.media3:media3-datasource-okhttp:${exoplayer_version}"
 
     // Load images from the web.
     implementation "io.coil-kt:coil-compose:$coil_version"
@@ -175,6 +168,9 @@ dependencies {
 
     // Language picker and Theme chooser
     implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'androidx.media3:media3-exoplayer-hls:1.1.0'
+    implementation 'androidx.media3:media3-ui:1.1.0'
+    implementation 'androidx.media3:media3-session:1.1.0'
 
     // Local model for language identification
     playImplementation 'com.google.mlkit:language-id:17.0.4'
@@ -183,7 +179,7 @@ dependencies {
     playImplementation 'com.google.mlkit:translate:17.0.1'
 
     // PushNotifications
-    playImplementation platform('com.google.firebase:firebase-bom:32.1.1')
+    playImplementation platform('com.google.firebase:firebase-bom:32.2.0')
     playImplementation 'com.google.firebase:firebase-messaging-ktx'
 
     // Charts
@@ -196,7 +192,7 @@ dependencies {
     implementation("org.jetbrains.kotlinx:kotlinx-collections-immutable:0.3.5")
 
     // Video compression lib
-    implementation 'com.github.AbedElazizShe:LightCompressor:1.2.3'
+    implementation 'com.github.AbedElazizShe:LightCompressor:1.3.1'
     // Image compression lib
     implementation 'id.zelory:compressor:3.0.1'
 

app/src/androidTest/java/com/vitorpamplona/amethyst/LnInvoiceUtilTest.kt

@@ -0,0 +1,24 @@
+package com.vitorpamplona.amethyst
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.vitorpamplona.amethyst.service.lnurl.LnInvoiceUtil
+import org.junit.Assert
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class LnInvoiceUtilTest {
+    @Test
+    fun test100KAmountCalculation() {
+        val bolt11 = "lnbc1m1pjt9u0qsp553q90pj5mafzv20w45eqavned9tgwhl4q99n9s5ppcw24nzw3zeqpp5002kd3ktym67du86kj665fgaev7ka8ys7j5yz5fg686lr5e2gfkshp5dkk27nnuax05az3pk2r6ytxtvwn5j4xzsq9ajprhc7crjkmgvr3qxqyjw5qcqpjrzjqtzxvfsuxe4l92pf97tt4rcgpy2xalkmlwexh899wqxf83l8nwv4xzh0gvqq89qqqqqqqqlgqqqqq0gqvs9qxpqysgqx5mz04wd7kqu5zhhel9enr036hjrp4gga0nz084p2asjl36a0zmrk6mhqa249zsgqref2rlvhffm73u7rxgr47gden6rugup4ksvpzsqvds4pz"
+        // Context of the app under test.
+        Assert.assertEquals(100000, LnInvoiceUtil.getAmountInSats(bolt11).toLong())
+    }
+
+    @Test
+    fun test100GAmountCalculation() {
+        val bolt11 = "lnbc1000000000000000p1pjtxqf0pp5myqxhcufqy56elfsg9dd4dthnqptusnnpwnul7u86l95xzjgqd8shp5gueg34sgm3u3nxqjqyunvvqdu0pr6jz6mwh4ew4886f2lpf4cmrqxqztgsp5w0cdfd45dfnqwex5gn85x7fru3jcrxhlcx3enx835477m3gdfcuq9qyyssqelrcmm7p9qazgjuxtdg7sd8nq5cscl2tratjlclt5rk5mc7uq2lphq3r2a43j5ua4leakc4emq8yp2yxdnzvzszpw6u2afac0kgl7hspfj67ta"
+        // Context of the app under test.
+        Assert.assertEquals(100000000000, LnInvoiceUtil.getAmountInSats(bolt11).toLong())
+    }
+}

app/src/androidTest/java/com/vitorpamplona/amethyst/RichTextParserTest.kt

@@ -4007,7 +4007,7 @@ class RichTextParserTest {
             "Bech(npub17m7f7q08k4x746s2v45eyvwppck32dcahw7uj2mu5txuswldgqkqw9zms7)"
         )
 
-        state.paragraphs.flatten().forEachIndexed { index, seg ->
+        state.paragraphs.map { it.words }.flatten().forEachIndexed { index, seg ->
             Assert.assertEquals(
                 expectedResult[index],
                 "${seg.javaClass.simpleName.replace("Segment", "")}(${seg.segmentText})"
@@ -4027,7 +4027,7 @@ class RichTextParserTest {
         Assert.assertTrue(state.imagesForPager.isEmpty())
         Assert.assertTrue(state.imageList.isEmpty())
         Assert.assertTrue(state.customEmoji.isEmpty())
-        Assert.assertEquals("Hi, how are you doing? ", state.paragraphs.firstOrNull()?.firstOrNull()?.segmentText)
+        Assert.assertEquals("Hi, how are you doing? ", state.paragraphs.firstOrNull()?.words?.firstOrNull()?.segmentText)
     }
 
     @Test
@@ -4039,7 +4039,7 @@ class RichTextParserTest {
         Assert.assertTrue(state.customEmoji.isEmpty())
         Assert.assertEquals(
             "\nHi, \nhow\n\n\n are you doing? \n",
-            state.paragraphs.joinToString("\n") { it.joinToString(" ") { it.segmentText } }
+            state.paragraphs.joinToString("\n") { it.words.joinToString(" ") { it.segmentText } }
         )
     }
 
@@ -4102,7 +4102,7 @@ https://nostr.build/i/fd53fcf5ad950fbe45127e4bcee1b59e8301d41de6beee211f45e344db
             "Image(https://nostr.build/i/fd53fcf5ad950fbe45127e4bcee1b59e8301d41de6beee211f45e344db214e8a.jpg)"
         )
 
-        state.paragraphs.flatten().forEachIndexed { index, seg ->
+        state.paragraphs.map { it.words }.flatten().forEachIndexed { index, seg ->
             Assert.assertEquals(
                 expectedResult[index],
                 "${seg.javaClass.simpleName.replace("Segment", "")}(${seg.segmentText})"
@@ -4112,7 +4112,7 @@ https://nostr.build/i/fd53fcf5ad950fbe45127e4bcee1b59e8301d41de6beee211f45e344db
 
     private fun printStateForDebug(state: RichTextViewerState) {
         state.paragraphs.forEachIndexed { index, paragraph ->
-            paragraph.forEach { seg ->
+            paragraph.words.forEach { seg ->
                 println(
                     "\"${
                     seg.javaClass.simpleName.replace(

app/src/main/AndroidManifest.xml

@@ -27,6 +27,13 @@
     <!-- To know receive notifications when the app connects/disconnects from the web -->
     <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
 
+    <!-- Audio/Video Playback -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK" />
+
+    <!-- Keeps screen on while playing videos -->
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+
     <!-- Old permission to access media -->
     <uses-permission
         android:name="android.permission.WRITE_EXTERNAL_STORAGE"
@@ -51,6 +58,7 @@
         <activity
             android:name=".ui.MainActivity"
             android:exported="true"
+            android:launchMode="singleTop"
             android:windowSoftInputMode="adjustResize"
             android:configChanges="orientation|screenSize|screenLayout"
             android:theme="@style/Theme.Amethyst">
@@ -91,6 +99,17 @@
             android:screenOrientation="fullSensor"
             tools:replace="screenOrientation" />
 
+        <service
+            android:name=".PlaybackService"
+            android:foregroundServiceType="mediaPlayback"
+            android:stopWithTask="true"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="androidx.media3.session.MediaSessionService"/>
+                <action android:name="android.media.browse.MediaBrowserService"/>
+            </intent-filter>
+        </service>
+
     </application>
 
 </manifest>

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

@@ -1,11 +1,35 @@
 package com.vitorpamplona.amethyst
 
 import android.app.Application
+import android.os.StrictMode
+import android.os.StrictMode.ThreadPolicy
+import android.os.StrictMode.VmPolicy
 
 class Amethyst : Application() {
     override fun onCreate() {
         super.onCreate()
         instance = this
+
+        if (BuildConfig.DEBUG) {
+            StrictMode.setThreadPolicy(
+                ThreadPolicy.Builder()
+                    .detectAll()
+                    .penaltyLog()
+                    .build()
+            )
+            StrictMode.setVmPolicy(
+                VmPolicy.Builder()
+                    .detectActivityLeaks()
+                    .detectFileUriExposure()
+                    .detectContentUriWithoutPermission()
+                    .detectLeakedClosableObjects()
+                    .detectLeakedRegistrationObjects()
+                    .detectLeakedSqlLiteObjects()
+                    .penaltyLog()
+                    // .penaltyDeath()
+                    .build()
+            )
+        }
     }
 
     companion object {

app/src/main/java/com/vitorpamplona/amethyst/LocalPreferences.kt

@@ -7,22 +7,24 @@ import androidx.compose.runtime.Immutable
 import com.google.gson.GsonBuilder
 import com.google.gson.reflect.TypeToken
 import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.ConnectivityType
 import com.vitorpamplona.amethyst.model.GLOBAL_FOLLOWS
 import com.vitorpamplona.amethyst.model.KIND3_FOLLOWS
 import com.vitorpamplona.amethyst.model.RelaySetupInfo
 import com.vitorpamplona.amethyst.model.Settings
 import com.vitorpamplona.amethyst.model.hexToByteArray
+import com.vitorpamplona.amethyst.model.parseConnectivityType
+import com.vitorpamplona.amethyst.model.toHexKey
 import com.vitorpamplona.amethyst.service.HttpClient
+import com.vitorpamplona.amethyst.service.KeyPair
 import com.vitorpamplona.amethyst.service.model.ContactListEvent
 import com.vitorpamplona.amethyst.service.model.Event
 import com.vitorpamplona.amethyst.service.model.Event.Companion.getRefinedEvent
 import com.vitorpamplona.amethyst.service.model.LnZapEvent
+import com.vitorpamplona.amethyst.service.toNpub
 import com.vitorpamplona.amethyst.ui.actions.ServersAvailable
 import com.vitorpamplona.amethyst.ui.note.Nip47URI
 import fr.acinq.secp256k1.Hex
-import nostr.postr.Persona
-import nostr.postr.toHex
-import nostr.postr.toNpub
 import java.io.File
 import java.util.Locale
 
@@ -209,8 +211,8 @@ object LocalPreferences {
     fun saveToEncryptedStorage(account: Account) {
         val prefs = encryptedPreferences(account.userProfile().pubkeyNpub())
         prefs.edit().apply {
-            account.loggedIn.privKey?.let { putString(PrefKeys.NOSTR_PRIVKEY, it.toHex()) }
-            account.loggedIn.pubKey.let { putString(PrefKeys.NOSTR_PUBKEY, it.toHex()) }
+            account.keyPair.privKey?.let { putString(PrefKeys.NOSTR_PRIVKEY, it.toHexKey()) }
+            account.keyPair.pubKey.let { putString(PrefKeys.NOSTR_PUBKEY, it.toHexKey()) }
             putStringSet(PrefKeys.FOLLOWING_CHANNELS, account.followingChannels)
             putStringSet(PrefKeys.FOLLOWING_COMMUNITIES, account.followingCommunities)
             putStringSet(PrefKeys.HIDDEN_USERS, account.hiddenUsers)
@@ -245,21 +247,21 @@ object LocalPreferences {
 
         val globalPrefs = encryptedPreferences()
         globalPrefs.edit().apply {
-            if (account.settings.automaticallyShowImages == null) {
+            if (account.settings.automaticallyShowImages.prefCode == null) {
                 remove(PrefKeys.AUTOMATICALLY_SHOW_IMAGES)
             } else {
-                putBoolean(PrefKeys.AUTOMATICALLY_SHOW_IMAGES, account.settings.automaticallyShowImages!!)
+                putBoolean(PrefKeys.AUTOMATICALLY_SHOW_IMAGES, account.settings.automaticallyShowImages.prefCode!!)
             }
 
-            if (account.settings.automaticallyStartPlayback == null) {
+            if (account.settings.automaticallyStartPlayback.prefCode == null) {
                 remove(PrefKeys.AUTOMATICALLY_START_PLAYBACK)
             } else {
-                putBoolean(PrefKeys.AUTOMATICALLY_START_PLAYBACK, account.settings.automaticallyStartPlayback!!)
+                putBoolean(PrefKeys.AUTOMATICALLY_START_PLAYBACK, account.settings.automaticallyStartPlayback.prefCode!!)
             }
-            if (account.settings.automaticallyShowUrlPreview == null) {
+            if (account.settings.automaticallyShowUrlPreview.prefCode == null) {
                 remove(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW)
             } else {
-                putBoolean(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW, account.settings.automaticallyShowUrlPreview!!)
+                putBoolean(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW, account.settings.automaticallyShowUrlPreview.prefCode!!)
             }
             putString(PrefKeys.PREFERRED_LANGUAGE, account.settings.preferredLanguage ?: "")
         }.apply()
@@ -390,27 +392,27 @@ object LocalPreferences {
             val settings = Settings()
             encryptedPreferences().apply {
                 settings.automaticallyShowImages = if (contains(PrefKeys.AUTOMATICALLY_SHOW_IMAGES)) {
-                    getBoolean(PrefKeys.AUTOMATICALLY_SHOW_IMAGES, false)
+                    parseConnectivityType(getBoolean(PrefKeys.AUTOMATICALLY_SHOW_IMAGES, false))
                 } else {
-                    null
+                    ConnectivityType.ALWAYS
                 }
 
                 settings.automaticallyStartPlayback = if (contains(PrefKeys.AUTOMATICALLY_START_PLAYBACK)) {
-                    getBoolean(PrefKeys.AUTOMATICALLY_START_PLAYBACK, false)
+                    parseConnectivityType(getBoolean(PrefKeys.AUTOMATICALLY_START_PLAYBACK, false))
                 } else {
-                    null
+                    ConnectivityType.ALWAYS
                 }
                 settings.automaticallyShowUrlPreview = if (contains(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW)) {
-                    getBoolean(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW, false)
+                    parseConnectivityType(getBoolean(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW, false))
                 } else {
-                    null
+                    ConnectivityType.ALWAYS
                 }
 
                 settings.preferredLanguage = getString(PrefKeys.PREFERRED_LANGUAGE, "")
             }
 
             val a = Account(
-                loggedIn = Persona(privKey = privKey?.hexToByteArray(), pubKey = pubKey.hexToByteArray()),
+                keyPair = KeyPair(privKey = privKey?.hexToByteArray(), pubKey = pubKey.hexToByteArray()),
                 followingChannels = followingChannels,
                 followingCommunities = followingCommunities,
                 hiddenUsers = hiddenUsers,

app/src/main/java/com/vitorpamplona/amethyst/MultiPlayerPlaybackManager.kt

@@ -0,0 +1,135 @@
+package com.vitorpamplona.amethyst
+
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import android.util.LruCache
+import androidx.core.net.toUri
+import androidx.media3.common.C
+import androidx.media3.common.Player
+import androidx.media3.common.Player.STATE_IDLE
+import androidx.media3.common.Player.STATE_READY
+import androidx.media3.exoplayer.ExoPlayer
+import androidx.media3.session.MediaSession
+import com.vitorpamplona.amethyst.ui.MainActivity
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlin.math.abs
+
+class MultiPlayerPlaybackManager(
+    private val dataSourceFactory: androidx.media3.exoplayer.source.MediaSource.Factory? = null,
+    private val cachedPositions: VideoViewedPositionCache
+) {
+    // protects from LruCache killing playing sessions
+    private val playingMap = mutableMapOf<String, MediaSession>()
+
+    private val cache =
+        object : LruCache<String, MediaSession>(10) { // up to 10 videos in the screen at the same time
+            override fun entryRemoved(
+                evicted: Boolean,
+                key: String?,
+                oldValue: MediaSession?,
+                newValue: MediaSession?
+            ) {
+                super.entryRemoved(evicted, key, oldValue, newValue)
+
+                if (!playingMap.contains(key)) {
+                    oldValue?.let {
+                        it.player.release()
+                        it.release()
+                    }
+                }
+            }
+        }
+
+    private fun getCallbackIntent(callbackUri: String, applicationContext: Context): PendingIntent {
+        return PendingIntent.getActivity(
+            applicationContext,
+            0,
+            Intent(Intent.ACTION_VIEW, callbackUri.toUri(), applicationContext, MainActivity::class.java),
+            PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
+        )
+    }
+
+    @androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
+    fun getMediaSession(id: String, uri: String, callbackUri: String?, context: Context, applicationContext: Context): MediaSession {
+        val existingSession = playingMap.get(id) ?: cache.get(id)
+        if (existingSession != null) return existingSession
+
+        val player = ExoPlayer.Builder(context).run {
+            dataSourceFactory?.let { setMediaSourceFactory(it) }
+            build()
+        }
+
+        player.apply {
+            repeatMode = Player.REPEAT_MODE_ALL
+            videoScalingMode = C.VIDEO_SCALING_MODE_SCALE_TO_FIT
+            volume = 0f
+        }
+
+        val mediaSession = MediaSession.Builder(context, player).run {
+            callbackUri?.let {
+                setSessionActivity(getCallbackIntent(it, applicationContext))
+            }
+            setId(id)
+            build()
+        }
+
+        player.addListener(object : Player.Listener {
+            override fun onIsPlayingChanged(isPlaying: Boolean) {
+                if (isPlaying) {
+                    player.setWakeMode(C.WAKE_MODE_NETWORK)
+                    playingMap.put(id, mediaSession)
+                } else {
+                    player.setWakeMode(C.WAKE_MODE_NONE)
+                    cache.put(id, mediaSession)
+                    playingMap.remove(id, mediaSession)
+                }
+            }
+
+            override fun onPlaybackStateChanged(playbackState: Int) {
+                when (playbackState) {
+                    STATE_IDLE -> {
+                        if (player.currentPosition > 5 * 60) { // 5 seconds
+                            cachedPositions.add(uri, player.currentPosition)
+                        }
+                    }
+                    STATE_READY -> {
+                        cachedPositions.get(uri)?.let { lastPosition ->
+                            if (abs(player.currentPosition - lastPosition) > 5 * 60) {
+                                player.seekTo(lastPosition)
+                            }
+                        }
+                    }
+                    else -> {
+                        if (player.currentPosition > 5 * 60) { // 5 seconds
+                            cachedPositions.add(uri, player.currentPosition)
+                        }
+                    }
+                }
+            }
+        })
+
+        cache.put(id, mediaSession)
+
+        return mediaSession
+    }
+
+    @OptIn(DelicateCoroutinesApi::class)
+    fun releaseAppPlayers() {
+        GlobalScope.launch(Dispatchers.Main) {
+            cache.evictAll()
+            playingMap.forEach {
+                it.value.player.release()
+                it.value.release()
+            }
+            playingMap.clear()
+        }
+    }
+
+    fun playingContent(): Collection<MediaSession> {
+        return playingMap.values
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/PlaybackClientController.kt

@@ -0,0 +1,45 @@
+package com.vitorpamplona.amethyst
+
+import android.content.ComponentName
+import android.content.Context
+import android.os.Bundle
+import android.util.Log
+import androidx.media3.session.MediaController
+import androidx.media3.session.SessionToken
+import com.google.common.util.concurrent.MoreExecutors
+
+object PlaybackClientController {
+    @androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
+    fun prepareController(
+        controllerID: String,
+        videoUri: String,
+        callbackUri: String?,
+        context: Context,
+        onReady: (MediaController) -> Unit
+    ) {
+        try {
+            // creating a bundle object
+            // creating a bundle object
+            val bundle = Bundle()
+            bundle.putString("id", controllerID)
+            bundle.putString("uri", videoUri)
+            bundle.putString("callbackUri", callbackUri)
+
+            val sessionTokenLocal = SessionToken(context, ComponentName(context, PlaybackService::class.java))
+            val controllerFuture = MediaController
+                .Builder(context, sessionTokenLocal)
+                .setConnectionHints(bundle)
+                .buildAsync()
+
+            controllerFuture.addListener(
+                {
+                    val controller = controllerFuture.get()
+                    onReady(controller)
+                },
+                MoreExecutors.directExecutor()
+            )
+        } catch (e: Exception) {
+            Log.e("Playback Client", "Failed to load Playback Client for $videoUri", e)
+        }
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/PlaybackService.kt

@@ -0,0 +1,131 @@
+package com.vitorpamplona.amethyst
+
+import androidx.annotation.OptIn
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.datasource.okhttp.OkHttpDataSource
+import androidx.media3.exoplayer.hls.HlsMediaSource
+import androidx.media3.exoplayer.source.MediaSource
+import androidx.media3.exoplayer.source.ProgressiveMediaSource
+import androidx.media3.session.DefaultMediaNotificationProvider
+import androidx.media3.session.MediaSession
+import androidx.media3.session.MediaSessionService
+import com.vitorpamplona.amethyst.service.HttpClient
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+
+@UnstableApi // Extend MediaSessionService
+class PlaybackService : MediaSessionService() {
+    private var videoViewedPositionCache = VideoViewedPositionCache()
+
+    private var managerHls: MultiPlayerPlaybackManager? = null
+    private var managerProgressive: MultiPlayerPlaybackManager? = null
+    private var managerLocal: MultiPlayerPlaybackManager? = null
+
+    fun newHslDataSource(): MediaSource.Factory {
+        return HlsMediaSource.Factory(OkHttpDataSource.Factory(HttpClient.getHttpClient()))
+    }
+
+    fun newProgressiveDataSource(): MediaSource.Factory {
+        return ProgressiveMediaSource.Factory(VideoCache.get(applicationContext, HttpClient.getHttpClient()))
+    }
+
+    // Create your Player and MediaSession in the onCreate lifecycle event
+    @kotlin.OptIn(DelicateCoroutinesApi::class)
+    @OptIn(UnstableApi::class)
+    override fun onCreate() {
+        super.onCreate()
+
+        GlobalScope.launch(Dispatchers.IO) {
+            managerHls = MultiPlayerPlaybackManager(newHslDataSource(), videoViewedPositionCache)
+            managerProgressive = MultiPlayerPlaybackManager(newProgressiveDataSource(), videoViewedPositionCache)
+            managerLocal = MultiPlayerPlaybackManager(cachedPositions = videoViewedPositionCache)
+
+            // Stop all videos and recreates all managers when the proxy changes.
+            HttpClient.proxyChangeListeners.add {
+                val toDestroyHls = managerHls
+                val toDestroyProgressive = managerProgressive
+
+                managerHls = MultiPlayerPlaybackManager(newHslDataSource(), videoViewedPositionCache)
+                managerProgressive = MultiPlayerPlaybackManager(newProgressiveDataSource(), videoViewedPositionCache)
+
+                toDestroyHls?.releaseAppPlayers()
+                toDestroyProgressive?.releaseAppPlayers()
+            }
+
+            setMediaNotificationProvider(
+                DefaultMediaNotificationProvider.Builder(applicationContext).build()
+            )
+        }
+    }
+
+    override fun onDestroy() {
+        managerHls?.releaseAppPlayers()
+        managerLocal?.releaseAppPlayers()
+        managerProgressive?.releaseAppPlayers()
+
+        super.onDestroy()
+    }
+
+    fun getAppropriateMediaSessionManager(fileName: String): MultiPlayerPlaybackManager? {
+        return if (fileName.startsWith("file")) {
+            managerLocal
+        } else if (fileName.endsWith("m3u8")) {
+            managerHls
+        } else {
+            managerProgressive
+        }
+    }
+
+    override fun onUpdateNotification(session: MediaSession, startInForegroundRequired: Boolean) {
+        // Updates any new player ready
+        super.onUpdateNotification(session, startInForegroundRequired)
+
+        // Overrides the notification with any player actually playing
+        managerHls?.playingContent()?.forEach {
+            if (it.player.isPlaying) {
+                super.onUpdateNotification(it, startInForegroundRequired)
+            }
+        }
+        managerLocal?.playingContent()?.forEach {
+            if (it.player.isPlaying) {
+                super.onUpdateNotification(session, startInForegroundRequired)
+            }
+        }
+        managerProgressive?.playingContent()?.forEach {
+            if (it.player.isPlaying) {
+                super.onUpdateNotification(session, startInForegroundRequired)
+            }
+        }
+
+        // Overrides again with playing with audio
+        managerHls?.playingContent()?.forEach {
+            if (it.player.isPlaying && it.player.volume > 0) {
+                super.onUpdateNotification(it, startInForegroundRequired)
+            }
+        }
+        managerLocal?.playingContent()?.forEach {
+            if (it.player.isPlaying && it.player.volume > 0) {
+                super.onUpdateNotification(session, startInForegroundRequired)
+            }
+        }
+        managerProgressive?.playingContent()?.forEach {
+            if (it.player.isPlaying && it.player.volume > 0) {
+                super.onUpdateNotification(session, startInForegroundRequired)
+            }
+        }
+    }
+
+    // Return a MediaSession to link with the MediaController that is making
+    // this request.
+    override fun onGetSession(controllerInfo: MediaSession.ControllerInfo): MediaSession? {
+        val id = controllerInfo.connectionHints.getString("id") ?: return null
+        val uri = controllerInfo.connectionHints.getString("uri") ?: return null
+        val callbackUri = controllerInfo.connectionHints.getString("callbackUri")
+
+        val manager = getAppropriateMediaSessionManager(uri)
+
+        return manager?.getMediaSession(id, uri, callbackUri, context = this, applicationContext = applicationContext)
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/ServiceManager.kt

@@ -60,9 +60,6 @@ object ServiceManager {
                 .build()
         }
 
-        // Initializes video cache.
-        VideoCache.init(context.applicationContext)
-
         if (myAccount != null) {
             Client.connect(myAccount.activeRelays() ?: myAccount.convertLocalRelays())
 
@@ -79,6 +76,7 @@ object ServiceManager {
             NostrAccountDataSource.start()
             NostrChatroomListDataSource.start()
             NostrDiscoveryDataSource.start()
+            NostrVideoDataSource.start()
 
             // More Info Data Sources
             NostrSingleEventDataSource.start()

app/src/main/java/com/vitorpamplona/amethyst/VideoCache.kt

@@ -1,14 +1,15 @@
 package com.vitorpamplona.amethyst
 
 import android.content.Context
-import com.google.android.exoplayer2.database.StandaloneDatabaseProvider
-import com.google.android.exoplayer2.ext.okhttp.OkHttpDataSource
-import com.google.android.exoplayer2.upstream.cache.CacheDataSource
-import com.google.android.exoplayer2.upstream.cache.LeastRecentlyUsedCacheEvictor
-import com.google.android.exoplayer2.upstream.cache.SimpleCache
-import com.vitorpamplona.amethyst.service.HttpClient
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.database.StandaloneDatabaseProvider
+import androidx.media3.datasource.cache.CacheDataSource
+import androidx.media3.datasource.cache.LeastRecentlyUsedCacheEvictor
+import androidx.media3.datasource.cache.SimpleCache
+import androidx.media3.datasource.okhttp.OkHttpDataSource
+import okhttp3.OkHttpClient
 
-object VideoCache {
+@UnstableApi object VideoCache {
 
     var exoPlayerCacheSize: Long = 90 * 1024 * 1024 // 90MB
 
@@ -20,33 +21,34 @@ object VideoCache {
     lateinit var cacheDataSourceFactory: CacheDataSource.Factory
 
     @Synchronized
-    fun init(context: Context) {
-        if (!this::simpleCache.isInitialized) {
-            exoDatabaseProvider = StandaloneDatabaseProvider(context)
+    @androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
+    private fun init(context: Context, client: OkHttpClient) {
+        exoDatabaseProvider = StandaloneDatabaseProvider(context)
 
-            simpleCache = SimpleCache(
-                context.cacheDir,
-                leastRecentlyUsedCacheEvictor,
-                exoDatabaseProvider
-            )
+        simpleCache = SimpleCache(
+            context.cacheDir,
+            leastRecentlyUsedCacheEvictor,
+            exoDatabaseProvider
+        )
 
-            cacheDataSourceFactory = CacheDataSource.Factory()
-                .setCache(simpleCache)
-                .setUpstreamDataSourceFactory(
-                    OkHttpDataSource.Factory(HttpClient.getHttpClient())
-                )
-                .setFlags(CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR)
-        } else {
-            cacheDataSourceFactory = CacheDataSource.Factory()
-                .setCache(simpleCache)
-                .setUpstreamDataSourceFactory(
-                    OkHttpDataSource.Factory(HttpClient.getHttpClient())
-                )
-                .setFlags(CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR)
-        }
+        renewCacheFactory(client)
     }
 
-    fun get(): CacheDataSource.Factory {
+    // This method should be called when proxy setting changes.
+    fun renewCacheFactory(client: OkHttpClient) {
+        cacheDataSourceFactory = CacheDataSource.Factory()
+            .setCache(simpleCache)
+            .setUpstreamDataSourceFactory(
+                OkHttpDataSource.Factory(client)
+            )
+            .setFlags(CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR)
+    }
+
+    fun get(context: Context, client: OkHttpClient): CacheDataSource.Factory {
+        if (!this::simpleCache.isInitialized) {
+            init(context, client)
+        }
+
         return cacheDataSourceFactory
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/VideoViewedPositionCache.kt

@@ -0,0 +1,15 @@
+package com.vitorpamplona.amethyst
+
+import android.util.LruCache
+
+class VideoViewedPositionCache {
+    val cachedPosition = LruCache<String, Long>(100)
+
+    fun add(uri: String, position: Long) {
+        cachedPosition.put(uri, position)
+    }
+
+    fun get(uri: String): Long? {
+        return cachedPosition.get(uri)
+    }
+}

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

@@ -7,6 +7,7 @@ import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.model.ATag
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
 import com.vitorpamplona.amethyst.service.model.LiveActivitiesEvent
+import com.vitorpamplona.amethyst.service.toNote
 import com.vitorpamplona.amethyst.ui.components.BundledUpdate
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 import fr.acinq.secp256k1.Hex
@@ -95,6 +96,10 @@ abstract class Channel(val idHex: String) {
         return null
     }
 
+    open fun creatorName(): String? {
+        return creator?.toBestDisplayName()
+    }
+
     open fun profilePicture(): String? {
         return creator?.profilePicture()
     }

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

@@ -1,119 +0,0 @@
-package com.vitorpamplona.amethyst.model
-
-import com.vitorpamplona.amethyst.service.nip19.Nip19
-import com.vitorpamplona.amethyst.ui.note.toShortenHex
-import fr.acinq.secp256k1.Hex
-import nostr.postr.Bech32
-import nostr.postr.Persona
-import nostr.postr.bechToBytes
-import nostr.postr.toHex
-import nostr.postr.toNpub
-
-/** Makes the distinction between String and Hex **/
-typealias HexKey = String
-
-typealias NPubKey = String
-typealias NoteId = String
-
-fun NPubKey.toDisplayKey(): String {
-    return this.toShortenHex()
-}
-
-fun NoteId.toDisplayId(): String {
-    return this.toShortenHex()
-}
-
-fun ByteArray.toNote() = Bech32.encodeBytes(hrp = "note", this, Bech32.Encoding.Bech32)
-
-fun ByteArray.toHexKey(): HexKey {
-    return toHex()
-}
-
-fun HexKey.hexToByteArray(): ByteArray {
-    return Hex.decode(this)
-}
-
-fun HexKey.toDisplayHexKey(): String {
-    return this.toShortenHex()
-}
-
-fun decodePublicKey(key: String): ByteArray {
-    val parsed = Nip19.uriToRoute(key)
-    val pubKeyParsed = parsed?.hex?.hexToByteArray()
-
-    return if (key.startsWith("nsec")) {
-        Persona(privKey = key.bechToBytes()).pubKey
-    } else if (pubKeyParsed != null) {
-        pubKeyParsed
-    } else {
-        Hex.decode(key)
-    }
-}
-
-fun decodePublicKeyAsHexOrNull(key: String): HexKey? {
-    return try {
-        val parsed = Nip19.uriToRoute(key)
-        val pubKeyParsed = parsed?.hex
-
-        if (key.startsWith("nsec")) {
-            Persona(privKey = key.bechToBytes()).pubKey.toHexKey()
-        } else if (pubKeyParsed != null) {
-            pubKeyParsed
-        } else {
-            Hex.decode(key).toHexKey()
-        }
-    } catch (e: Exception) {
-        null
-    }
-}
-
-data class DirtyKeyInfo(val key: Nip19.Return, val restOfWord: String)
-
-fun parseDirtyWordForKey(mightBeAKey: String): DirtyKeyInfo? {
-    var key = mightBeAKey
-    if (key.startsWith("nostr:", true)) {
-        key = key.substring("nostr:".length)
-    }
-
-    key = key.removePrefix("@")
-
-    if (key.length < 63) {
-        return null
-    }
-
-    try {
-        val keyB32 = key.substring(0, 63)
-        val restOfWord = key.substring(63)
-
-        if (key.startsWith("nsec1", true)) {
-            // Converts to npub
-            val pubkey = Nip19.uriToRoute(Persona(privKey = keyB32.bechToBytes()).pubKey.toNpub()) ?: return null
-
-            return DirtyKeyInfo(pubkey, restOfWord)
-        } else if (key.startsWith("npub1", true)) {
-            val pubkey = Nip19.uriToRoute(keyB32) ?: return null
-
-            return DirtyKeyInfo(pubkey, restOfWord)
-        } else if (key.startsWith("note1", true)) {
-            val noteId = Nip19.uriToRoute(keyB32) ?: return null
-
-            return DirtyKeyInfo(noteId, restOfWord)
-        } else if (key.startsWith("nprofile", true)) {
-            val pubkeyRelay = Nip19.uriToRoute(keyB32 + restOfWord) ?: return null
-
-            return DirtyKeyInfo(pubkeyRelay, pubkeyRelay.additionalChars)
-        } else if (key.startsWith("nevent1", true)) {
-            val noteRelayId = Nip19.uriToRoute(keyB32 + restOfWord) ?: return null
-
-            return DirtyKeyInfo(noteRelayId, noteRelayId.additionalChars)
-        } else if (key.startsWith("naddr1", true)) {
-            val address = Nip19.uriToRoute(keyB32 + restOfWord) ?: return null
-
-            return DirtyKeyInfo(address, address.additionalChars) // no way to know when they address ends and dirt begins
-        }
-    } catch (e: Exception) {
-        e.printStackTrace()
-    }
-
-    return null
-}

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

@@ -0,0 +1,52 @@
+package com.vitorpamplona.amethyst.model
+
+import com.vitorpamplona.amethyst.service.KeyPair
+import com.vitorpamplona.amethyst.service.bechToBytes
+import com.vitorpamplona.amethyst.service.nip19.Nip19
+import com.vitorpamplona.amethyst.ui.note.toShortenHex
+import fr.acinq.secp256k1.Hex
+
+/** Makes the distinction between String and Hex **/
+typealias HexKey = String
+
+fun ByteArray.toHexKey(): HexKey {
+    return Hex.encode(this)
+}
+
+fun HexKey.hexToByteArray(): ByteArray {
+    return Hex.decode(this)
+}
+
+fun HexKey.toDisplayHexKey(): String {
+    return this.toShortenHex()
+}
+
+fun decodePublicKey(key: String): ByteArray {
+    val parsed = Nip19.uriToRoute(key)
+    val pubKeyParsed = parsed?.hex?.hexToByteArray()
+
+    return if (key.startsWith("nsec")) {
+        KeyPair(privKey = key.bechToBytes()).pubKey
+    } else if (pubKeyParsed != null) {
+        pubKeyParsed
+    } else {
+        Hex.decode(key)
+    }
+}
+
+fun decodePublicKeyAsHexOrNull(key: String): HexKey? {
+    return try {
+        val parsed = Nip19.uriToRoute(key)
+        val pubKeyParsed = parsed?.hex
+
+        if (key.startsWith("nsec")) {
+            KeyPair(privKey = key.bechToBytes()).pubKey.toHexKey()
+        } else if (pubKeyParsed != null) {
+            pubKeyParsed
+        } else {
+            Hex.decode(key).toHexKey()
+        }
+    } catch (e: Exception) {
+        null
+    }
+}

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

@@ -33,7 +33,7 @@ object LocalCache {
         ConcurrentHashMap<HexKey, Pair<Note?, (LnZapPaymentResponseEvent) -> Unit>>(10)
 
     fun checkGetOrCreateUser(key: String): User? {
-        checkNotInMainThread()
+        // checkNotInMainThread()
 
         if (isValidHex(key)) {
             return getOrCreateUser(key)
@@ -143,7 +143,7 @@ object LocalCache {
     }
 
     fun getOrCreateAddressableNoteInternal(key: ATag): AddressableNote {
-        checkNotInMainThread()
+        // checkNotInMainThread()
 
         // we can't use naddr here because naddr might include relay info and
         // the preferred relay should not be part of the index.
@@ -176,6 +176,16 @@ object LocalCache {
         }
     }
 
+    fun consume(event: ContactListEvent) {
+        val user = getOrCreateUser(event.pubKey)
+
+        // avoids processing empty contact lists.
+        if (event.createdAt > (user.latestContactList?.createdAt ?: 0) && !event.tags.isEmpty()) {
+            user.updateContactList(event)
+            // Log.d("CL", "AAA ${user.toBestDisplayName()} ${follows.size}")
+        }
+    }
+
     fun consume(event: BookmarkListEvent) {
         val user = getOrCreateUser(event.pubKey)
         if (user.latestBookmarkList == null || event.createdAt > user.latestBookmarkList!!.createdAt) {
@@ -238,9 +248,6 @@ object LocalCache {
 
         // Log.d("TN", "New Note (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${note.event?.content()?.split("\n")?.take(100)} ${formattedDateTime(event.createdAt)}")
 
-        // Prepares user's profile view.
-        author.addNote(note)
-
         // Counts the replies
         replyTo.forEach {
             it.addReply(note)
@@ -279,8 +286,6 @@ object LocalCache {
         if (event.createdAt > (note.createdAt() ?: 0)) {
             note.loadEvent(event, author, replyTo)
 
-            author.addNote(note)
-
             refreshObservers(note)
         }
     }
@@ -310,9 +315,6 @@ object LocalCache {
 
         // Log.d("TN", "New Note (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${note.event?.content()?.split("\n")?.take(100)} ${formattedDateTime(event.createdAt)}")
 
-        // Prepares user's profile view.
-        author.addNote(note)
-
         // Counts the replies
         replyTo.forEach {
             it.addReply(note)
@@ -518,7 +520,7 @@ object LocalCache {
         if (event.createdAt > (note.createdAt() ?: 0)) {
             note.loadEvent(event, author, replyTo)
 
-            author.updateAcceptedBadges(note)
+            refreshObservers(note)
         }
     }
 
@@ -543,6 +545,26 @@ object LocalCache {
         refreshObservers(note)
     }
 
+    private fun comsume(event: NNSEvent) {
+        val version = getOrCreateNote(event.id)
+        val note = getOrCreateAddressableNote(event.address())
+        val author = getOrCreateUser(event.pubKey)
+
+        if (version.event == null) {
+            version.loadEvent(event, author, emptyList())
+            version.moveAllReferencesTo(note)
+        }
+
+        // Already processed this event.
+        if (note.event?.id() == event.id()) return
+
+        if (event.createdAt > (note.createdAt() ?: 0)) {
+            note.loadEvent(event, author, emptyList())
+
+            refreshObservers(note)
+        }
+    }
+
     fun consume(event: AppDefinitionEvent) {
         val version = getOrCreateNote(event.id)
         val note = getOrCreateAddressableNote(event.address())
@@ -554,7 +576,7 @@ object LocalCache {
         }
 
         // Already processed this event.
-        if (note.event != null) return
+        if (note.event?.id() == event.id()) return
 
         if (event.createdAt > (note.createdAt() ?: 0)) {
             note.loadEvent(event, author, emptyList())
@@ -588,16 +610,6 @@ object LocalCache {
 //        // Log.d("RR", event.toJson())
     }
 
-    fun consume(event: ContactListEvent) {
-        val user = getOrCreateUser(event.pubKey)
-
-        // avoids processing empty contact lists.
-        if (event.createdAt > (user.latestContactList?.createdAt ?: 0) && !event.tags.isEmpty()) {
-            user.updateContactList(event)
-            // Log.d("CL", "AAA ${user.toBestDisplayName()} ${follows.size}")
-        }
-    }
-
     fun consume(event: PrivateDmEvent, relay: Relay?): Note {
         val note = getOrCreateNote(event.id)
         val author = getOrCreateUser(event.pubKey)
@@ -634,8 +646,6 @@ object LocalCache {
         event.deleteEvents().mapNotNull { notes[it] }.forEach { deleteNote ->
             // must be the same author
             if (deleteNote.author?.pubkeyHex == event.pubKey) {
-                deleteNote.author?.removeNote(deleteNote)
-
                 // reverts the add
                 val mentions = deleteNote.event?.tags()?.filter { it.firstOrNull() == "p" }
                     ?.mapNotNull { it.getOrNull(1) }?.mapNotNull { checkGetOrCreateUser(it) }
@@ -697,9 +707,6 @@ object LocalCache {
 
         note.loadEvent(event, author, repliesTo)
 
-        // Prepares user's profile view.
-        author.addNote(note)
-
         // Counts the replies
         repliesTo.forEach {
             it.addBoost(note)
@@ -722,9 +729,6 @@ object LocalCache {
 
         note.loadEvent(event, author, repliesTo)
 
-        // Prepares user's profile view.
-        author.addNote(note)
-
         // Counts the replies
         repliesTo.forEach {
             it.addBoost(note)
@@ -750,9 +754,6 @@ object LocalCache {
 
         note.loadEvent(event, author, eventsApproved)
 
-        // Prepares user's profile view.
-        author.addNote(note)
-
         // Counts the replies
         repliesTo.forEach {
             it.addBoost(note)
@@ -1072,9 +1073,6 @@ object LocalCache {
 
         note.loadEvent(event, author, emptyList())
 
-        // Adds to user profile
-        author.addNote(note)
-
         refreshObservers(note)
     }
 
@@ -1245,24 +1243,26 @@ object LocalCache {
                 }
             }
 
-            println("PRUNE: ${toBeRemoved.size} messages removed from ${it.value.toBestDisplayName()}. ${it.value.notes.size} kept")
+            if (toBeRemoved.size > 100 || it.value.notes.size > 100) {
+                println("PRUNE: ${toBeRemoved.size} messages removed from ${it.value.toBestDisplayName()}. ${it.value.notes.size} kept")
+            }
         }
     }
 
     fun pruneHiddenMessages(account: Account) {
         checkNotInMainThread()
 
-        val toBeRemoved = account.hiddenUsers.map {
-            (users[it]?.notes ?: emptySet())
+        val toBeRemoved = account.hiddenUsers.map { userHex ->
+            (
+                notes.values.filter {
+                    it.event?.pubKey() == userHex
+                } + addressables.values.filter {
+                    it.event?.pubKey() == userHex
+                }
+                ).toSet()
         }.flatten()
 
-        account.hiddenUsers.forEach {
-            users[it]?.clearNotes()
-        }
-
         toBeRemoved.forEach {
-            it.author?.removeNote(it)
-
             // Counts the replies
             it.replyTo?.forEach { masterNote ->
                 masterNote.removeReply(it)
@@ -1355,6 +1355,7 @@ object LocalCache {
                 is LnZapPaymentResponseEvent -> consume(event)
                 is LongTextNoteEvent -> consume(event, relay)
                 is MetadataEvent -> consume(event)
+                is NNSEvent -> comsume(event)
                 is PrivateDmEvent -> consume(event, relay)
                 is PinListEvent -> consume(event)
                 is PeopleListEvent -> consume(event)

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

@@ -11,6 +11,7 @@ import com.vitorpamplona.amethyst.service.model.*
 import com.vitorpamplona.amethyst.service.nip19.Nip19
 import com.vitorpamplona.amethyst.service.relays.EOSETime
 import com.vitorpamplona.amethyst.service.relays.Relay
+import com.vitorpamplona.amethyst.service.toNote
 import com.vitorpamplona.amethyst.ui.actions.ImmutableListOfLists
 import com.vitorpamplona.amethyst.ui.actions.updated
 import com.vitorpamplona.amethyst.ui.components.BundledUpdate
@@ -75,6 +76,10 @@ open class Note(val idHex: String) {
         return Nip19.createNEvent(idHex, author?.pubkeyHex, event?.kind(), relays.firstOrNull())
     }
 
+    fun toNostrUri(): String {
+        return "nostr:${toNEvent()}"
+    }
+
     open fun idDisplayNote() = idNote().toShortenHex()
 
     fun channelHex(): HexKey? {
@@ -212,26 +217,58 @@ open class Note(val idHex: String) {
     }
 
     @Synchronized
+    private fun innerAddZap(zapRequest: Note, zap: Note?): Boolean {
+        if (zapRequest !in zaps.keys) {
+            zaps = zaps + Pair(zapRequest, zap)
+            return true
+        } else if (zaps[zapRequest] == null) {
+            zaps = zaps + Pair(zapRequest, zap)
+            return true
+        }
+
+        return false
+    }
+
     fun addZap(zapRequest: Note, zap: Note?) {
         checkNotInMainThread()
         if (zapRequest !in zaps.keys) {
-            zaps = zaps + Pair(zapRequest, zap)
-            liveSet?.zaps?.invalidateData()
-        } else if (zapRequest in zaps.keys && zaps[zapRequest] == null) {
-            zaps = zaps + Pair(zapRequest, zap)
-            liveSet?.zaps?.invalidateData()
+            val inserted = innerAddZap(zapRequest, zap)
+            if (inserted) {
+                liveSet?.zaps?.invalidateData()
+            }
+        } else if (zaps[zapRequest] == null) {
+            val inserted = innerAddZap(zapRequest, zap)
+            if (inserted) {
+                liveSet?.zaps?.invalidateData()
+            }
         }
     }
 
     @Synchronized
+    private fun innerAddZapPayment(zapPaymentRequest: Note, zapPayment: Note?): Boolean {
+        if (zapPaymentRequest !in zapPayments.keys) {
+            zapPayments = zapPayments + Pair(zapPaymentRequest, zapPayment)
+            return true
+        } else if (zapPayments[zapPaymentRequest] == null) {
+            zapPayments = zapPayments + Pair(zapPaymentRequest, zapPayment)
+            return true
+        }
+
+        return false
+    }
+
     fun addZapPayment(zapPaymentRequest: Note, zapPayment: Note?) {
         checkNotInMainThread()
         if (zapPaymentRequest !in zapPayments.keys) {
-            zapPayments = zapPayments + Pair(zapPaymentRequest, zapPayment)
-            liveSet?.zaps?.invalidateData()
-        } else if (zapPaymentRequest in zapPayments.keys && zapPayments[zapPaymentRequest] == null) {
-            zapPayments = zapPayments + Pair(zapPaymentRequest, zapPayment)
-            liveSet?.zaps?.invalidateData()
+            val inserted = innerAddZapPayment(zapPaymentRequest, zapPayment)
+            if (inserted) {
+                liveSet?.zaps?.invalidateData()
+            }
+        } else if (zapPayments[zapPaymentRequest] == null) {
+            val inserted = innerAddZapPayment(zapPaymentRequest, zapPayment)
+            if (inserted) {
+                liveSet?.zaps?.invalidateData()
+            }
         }
     }
 
@@ -531,6 +568,22 @@ open class Note(val idHex: String) {
             liveSet = null
         }
     }
+
+    fun isHiddenFor(accountChoices: Account.LiveHiddenUsers): Boolean {
+        if (event == null) return false
+
+        val isBoostedNoteHidden = if (event is GenericRepostEvent || event is RepostEvent || event is CommunityPostApprovalEvent) {
+            replyTo?.lastOrNull()?.isHiddenFor(accountChoices) ?: false
+        } else {
+            false
+        }
+
+        val isSensitive = event?.isSensitive() ?: false
+        return isBoostedNoteHidden ||
+            accountChoices.hiddenUsers.contains(author?.pubkeyHex) ||
+            accountChoices.spammers.contains(author?.pubkeyHex) ||
+            (isSensitive && accountChoices.showSensitiveContent == false)
+    }
 }
 
 class NoteLiveSet(u: Note) {

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

@@ -1,11 +1,40 @@
 package com.vitorpamplona.amethyst.model
 
 import androidx.compose.runtime.Stable
+import com.vitorpamplona.amethyst.R
 
 @Stable
 class Settings(
-    var automaticallyShowImages: Boolean? = null,
-    var automaticallyStartPlayback: Boolean? = null,
     var preferredLanguage: String? = null,
-    var automaticallyShowUrlPreview: Boolean? = null
+    var automaticallyShowImages: ConnectivityType = ConnectivityType.ALWAYS,
+    var automaticallyStartPlayback: ConnectivityType = ConnectivityType.ALWAYS,
+    var automaticallyShowUrlPreview: ConnectivityType = ConnectivityType.ALWAYS
 )
+
+enum class ConnectivityType(val prefCode: Boolean?, val screenCode: Int, val reourceId: Int) {
+    ALWAYS(null, 0, R.string.connectivity_type_always),
+    WIFI_ONLY(true, 1, R.string.connectivity_type_wifi_only),
+    NEVER(false, 2, R.string.connectivity_type_never)
+}
+
+fun parseConnectivityType(code: Boolean?): ConnectivityType {
+    return when (code) {
+        ConnectivityType.ALWAYS.prefCode -> ConnectivityType.ALWAYS
+        ConnectivityType.WIFI_ONLY.prefCode -> ConnectivityType.WIFI_ONLY
+        ConnectivityType.NEVER.prefCode -> ConnectivityType.NEVER
+        else -> {
+            ConnectivityType.ALWAYS
+        }
+    }
+}
+
+fun parseConnectivityType(screenCode: Int): ConnectivityType {
+    return when (screenCode) {
+        ConnectivityType.ALWAYS.screenCode -> ConnectivityType.ALWAYS
+        ConnectivityType.WIFI_ONLY.screenCode -> ConnectivityType.WIFI_ONLY
+        ConnectivityType.NEVER.screenCode -> ConnectivityType.NEVER
+        else -> {
+            ConnectivityType.ALWAYS
+        }
+    }
+}

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

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.model
 import androidx.compose.runtime.Immutable
 import androidx.compose.runtime.Stable
 import androidx.lifecycle.LiveData
+import com.vitorpamplona.amethyst.service.Bech32
 import com.vitorpamplona.amethyst.service.NostrSingleUserDataSource
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.model.BookmarkListEvent
@@ -12,14 +13,13 @@ import com.vitorpamplona.amethyst.service.model.MetadataEvent
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.service.relays.EOSETime
 import com.vitorpamplona.amethyst.service.relays.Relay
+import com.vitorpamplona.amethyst.service.toNpub
 import com.vitorpamplona.amethyst.ui.actions.ImmutableListOfLists
 import com.vitorpamplona.amethyst.ui.actions.toImmutableListOfLists
 import com.vitorpamplona.amethyst.ui.components.BundledUpdate
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 import fr.acinq.secp256k1.Hex
 import kotlinx.coroutines.Dispatchers
-import nostr.postr.Bech32
-import nostr.postr.toNpub
 import java.math.BigDecimal
 import java.util.regex.Pattern
 
@@ -31,10 +31,6 @@ class User(val pubkeyHex: String) {
 
     var latestContactList: ContactListEvent? = null
     var latestBookmarkList: BookmarkListEvent? = null
-    var latestAcceptedBadges: AddressableNote? = null
-
-    var notes = setOf<Note>()
-        private set
 
     var reports = mapOf<User, Set<Note>>()
         private set
@@ -55,6 +51,8 @@ class User(val pubkeyHex: String) {
 
     fun pubkeyDisplayHex() = pubkeyNpub().toShortenHex()
 
+    fun toNostrUri() = "nostr:${pubkeyNpub()}"
+
     override fun toString(): String = pubkeyHex
 
     fun toBestDisplayName(): String {
@@ -106,21 +104,6 @@ class User(val pubkeyHex: String) {
         liveSet?.relays?.invalidateData()
     }
 
-    fun addNote(note: Note) {
-        if (note !in notes) {
-            notes = notes + note
-            // No need for Listener yet
-        }
-    }
-
-    fun removeNote(note: Note) {
-        notes = notes - note
-    }
-
-    fun clearNotes() {
-        notes = setOf<Note>()
-    }
-
     fun addReport(note: Note) {
         val author = note.author ?: return
 
@@ -144,13 +127,6 @@ class User(val pubkeyHex: String) {
         }
     }
 
-    fun updateAcceptedBadges(note: AddressableNote) {
-        if (latestAcceptedBadges?.idHex != note.idHex) {
-            latestAcceptedBadges = note
-            liveSet?.badges?.invalidateData()
-        }
-    }
-
     fun addZap(zapRequest: Note, zap: Note?) {
         if (zapRequest !in zaps.keys) {
             zaps = zaps + Pair(zapRequest, zap)
@@ -301,6 +277,10 @@ class User(val pubkeyHex: String) {
         return latestContactList?.verifiedFollowTagSet ?: emptySet()
     }
 
+    fun cachedFollowingCommunitiesSet(): Set<HexKey> {
+        return latestContactList?.verifiedFollowCommunitySet ?: emptySet()
+    }
+
     fun cachedFollowCount(): Int? {
         return latestContactList?.verifiedFollowKeySet?.size
     }
@@ -351,7 +331,6 @@ class UserLiveSet(u: User) {
     val relayInfo: UserLiveData = UserLiveData(u)
     val metadata: UserLiveData = UserLiveData(u)
     val zaps: UserLiveData = UserLiveData(u)
-    val badges: UserLiveData = UserLiveData(u)
     val bookmarks: UserLiveData = UserLiveData(u)
 
     fun isInUse(): Boolean {
@@ -363,7 +342,6 @@ class UserLiveSet(u: User) {
             relayInfo.hasObservers() ||
             metadata.hasObservers() ||
             zaps.hasObservers() ||
-            badges.hasObservers() ||
             bookmarks.hasObservers()
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/Bech32Util.kt

@@ -0,0 +1,217 @@
+package com.vitorpamplona.amethyst.service
+
+/*
+ * Copyright 2020 ACINQ SAS
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import kotlin.jvm.JvmStatic
+
+/**
+ * Bech32 works with 5 bits values, we use this type to make it explicit: whenever you see Int5 it means 5 bits values,
+ * and whenever you see Byte it means 8 bits values.
+ */
+private typealias Int5 = Byte
+
+/**
+ * Bech32 and Bech32m address formats.
+ * See https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki and https://github.com/bitcoin/bips/blob/master/bip-0350.mediawiki.
+ */
+object Bech32 {
+    const val alphabet: String = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
+
+    enum class Encoding(public val constant: Int) {
+        Bech32(1),
+        Bech32m(0x2bc830a3),
+        Beck32WithoutChecksum(0)
+    }
+
+    // char -> 5 bits value
+    private val map = Array<Int5>(255) { -1 }
+
+    init {
+        for (i in 0..alphabet.lastIndex) {
+            map[alphabet[i].code] = i.toByte()
+        }
+    }
+
+    private fun expand(hrp: String): Array<Int5> {
+        val result = Array<Int5>(hrp.length + 1 + hrp.length) { 0 }
+        for (i in hrp.indices) {
+            result[i] = hrp[i].code.shr(5).toByte()
+            result[hrp.length + 1 + i] = (hrp[i].code and 31).toByte()
+        }
+        result[hrp.length] = 0
+        return result
+    }
+
+    private fun polymod(values: Array<Int5>, values1: Array<Int5>): Int {
+        val GEN = arrayOf(0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3)
+        var chk = 1
+        values.forEach { v ->
+            val b = chk shr 25
+            chk = ((chk and 0x1ffffff) shl 5) xor v.toInt()
+            for (i in 0..5) {
+                if (((b shr i) and 1) != 0) chk = chk xor GEN[i]
+            }
+        }
+        values1.forEach { v ->
+            val b = chk shr 25
+            chk = ((chk and 0x1ffffff) shl 5) xor v.toInt()
+            for (i in 0..5) {
+                if (((b shr i) and 1) != 0) chk = chk xor GEN[i]
+            }
+        }
+        return chk
+    }
+
+    /**
+     * @param hrp human readable prefix
+     * @param int5s 5-bit data
+     * @param encoding encoding to use (bech32 or bech32m)
+     * @return hrp + data encoded as a Bech32 string
+     */
+    @JvmStatic
+    public fun encode(hrp: String, int5s: Array<Int5>, encoding: Encoding): String {
+        require(hrp.lowercase() == hrp || hrp.uppercase() == hrp) { "mixed case strings are not valid bech32 prefixes" }
+        val data = int5s.toByteArray().toTypedArray()
+        val checksum = when (encoding) {
+            Encoding.Beck32WithoutChecksum -> arrayOf()
+            else -> checksum(hrp, data, encoding)
+        }
+        return hrp + "1" + (data + checksum).map { i -> alphabet[i.toInt()] }.toCharArray().concatToString()
+    }
+
+    /**
+     * @param hrp human readable prefix
+     * @param data data to encode
+     * @param encoding encoding to use (bech32 or bech32m)
+     * @return hrp + data encoded as a Bech32 string
+     */
+    @JvmStatic
+    public fun encodeBytes(hrp: String, data: ByteArray, encoding: Encoding): String = encode(hrp, eight2five(data), encoding)
+
+    /**
+     * decodes a bech32 string
+     * @param bech32 bech32 string
+     * @param noChecksum if true, the bech32 string doesn't have a checksum
+     * @return a (hrp, data, encoding) tuple
+     */
+    @JvmStatic
+    public fun decode(bech32: String, noChecksum: Boolean = false): Triple<String, Array<Int5>, Encoding> {
+        require(bech32.lowercase() == bech32 || bech32.uppercase() == bech32) { "mixed case strings are not valid bech32" }
+        bech32.forEach { require(it.code in 33..126) { "invalid character " } }
+        val input = bech32.lowercase()
+        val pos = input.lastIndexOf('1')
+        val hrp = input.take(pos)
+        require(hrp.length in 1..83) { "hrp must contain 1 to 83 characters" }
+        val data = Array<Int5>(input.length - pos - 1) { 0 }
+        for (i in 0..data.lastIndex) data[i] = map[input[pos + 1 + i].code]
+        return if (noChecksum) {
+            Triple(hrp, data, Encoding.Beck32WithoutChecksum)
+        } else {
+            val encoding = when (polymod(expand(hrp), data)) {
+                Encoding.Bech32.constant -> Encoding.Bech32
+                Encoding.Bech32m.constant -> Encoding.Bech32m
+                else -> throw IllegalArgumentException("invalid checksum for $bech32")
+            }
+            Triple(hrp, data.dropLast(6).toTypedArray(), encoding)
+        }
+    }
+
+    /**
+     * decodes a bech32 string
+     * @param bech32 bech32 string
+     * @param noChecksum if true, the bech32 string doesn't have a checksum
+     * @return a (hrp, data, encoding) tuple
+     */
+    @JvmStatic
+    public fun decodeBytes(bech32: String, noChecksum: Boolean = false): Triple<String, ByteArray, Encoding> {
+        val (hrp, int5s, encoding) = decode(bech32, noChecksum)
+        return Triple(hrp, five2eight(int5s, 0), encoding)
+    }
+
+    /**
+     * @param hrp Human Readable Part
+     * @param data data (a sequence of 5 bits integers)
+     * @param encoding encoding to use (bech32 or bech32m)
+     * @return a checksum computed over hrp and data
+     */
+    private fun checksum(hrp: String, data: Array<Int5>, encoding: Encoding): Array<Int5> {
+        val values = expand(hrp) + data
+        val poly = polymod(values, arrayOf(0.toByte(), 0.toByte(), 0.toByte(), 0.toByte(), 0.toByte(), 0.toByte())) xor encoding.constant
+        return Array(6) { i -> (poly.shr(5 * (5 - i)) and 31).toByte() }
+    }
+
+    /**
+     * @param input a sequence of 8 bits integers
+     * @return a sequence of 5 bits integers
+     */
+    @JvmStatic
+    public fun eight2five(input: ByteArray): Array<Int5> {
+        var buffer = 0L
+        val output = ArrayList<Int5>()
+        var count = 0
+        input.forEach { b ->
+            buffer = (buffer shl 8) or (b.toLong() and 0xff)
+            count += 8
+            while (count >= 5) {
+                output.add(((buffer shr (count - 5)) and 31).toByte())
+                count -= 5
+            }
+        }
+        if (count > 0) output.add(((buffer shl (5 - count)) and 31).toByte())
+        return output.toTypedArray()
+    }
+
+    /**
+     * @param input a sequence of 5 bits integers
+     * @return a sequence of 8 bits integers
+     */
+    @JvmStatic
+    public fun five2eight(input: Array<Int5>, offset: Int): ByteArray {
+        var buffer = 0L
+        val output = ArrayList<Byte>()
+        var count = 0
+        for (i in offset..input.lastIndex) {
+            val b = input[i]
+            buffer = (buffer shl 5) or (b.toLong() and 31)
+            count += 5
+            while (count >= 8) {
+                output.add(((buffer shr (count - 8)) and 0xff).toByte())
+                count -= 8
+            }
+        }
+        require(count <= 4) { "Zero-padding of more than 4 bits" }
+        require((buffer and ((1L shl count) - 1L)) == 0L) { "Non-zero padding in 8-to-5 conversion" }
+        return output.toByteArray()
+    }
+}
+
+fun ByteArray.toNsec() = Bech32.encodeBytes(hrp = "nsec", this, Bech32.Encoding.Bech32)
+fun ByteArray.toNpub() = Bech32.encodeBytes(hrp = "npub", this, Bech32.Encoding.Bech32)
+fun ByteArray.toNote() = Bech32.encodeBytes(hrp = "note", this, Bech32.Encoding.Bech32)
+fun ByteArray.toNEvent() = Bech32.encodeBytes(hrp = "nevent", this, Bech32.Encoding.Bech32)
+fun ByteArray.toNAddress() = Bech32.encodeBytes(hrp = "naddr", this, Bech32.Encoding.Bech32)
+fun ByteArray.toLnUrl() = Bech32.encodeBytes(hrp = "lnurl", this, Bech32.Encoding.Bech32)
+
+fun String.bechToBytes(hrp: String? = null): ByteArray {
+    val decodedForm = Bech32.decodeBytes(this)
+    hrp?.also {
+        if (it != decodedForm.first) {
+            throw IllegalArgumentException("Expected $it but obtained ${decodedForm.first}")
+        }
+    }
+    return decodedForm.second
+}

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

@@ -0,0 +1,87 @@
+package com.vitorpamplona.amethyst.service
+
+import fr.acinq.secp256k1.Hex
+import fr.acinq.secp256k1.Secp256k1
+import java.security.MessageDigest
+import java.security.SecureRandom
+import java.util.Base64
+import javax.crypto.Cipher
+import javax.crypto.spec.IvParameterSpec
+import javax.crypto.spec.SecretKeySpec
+
+object CryptoUtils {
+    private val secp256k1 = Secp256k1.get()
+    private val random = SecureRandom()
+
+    /**
+     * Provides a 32B "private key" aka random number
+     */
+    fun privkeyCreate(): ByteArray {
+        val bytes = ByteArray(32)
+        random.nextBytes(bytes)
+        return bytes
+    }
+
+    fun pubkeyCreate(privKey: ByteArray) =
+        secp256k1.pubKeyCompress(secp256k1.pubkeyCreate(privKey)).copyOfRange(1, 33)
+
+    fun sign(data: ByteArray, privKey: ByteArray): ByteArray =
+        secp256k1.signSchnorr(data, privKey, null)
+
+    fun encrypt(msg: String, privateKey: ByteArray, pubKey: ByteArray): String {
+        val sharedSecret = getSharedSecret(privateKey, pubKey)
+        return encrypt(msg, sharedSecret)
+    }
+
+    fun encrypt(msg: String, sharedSecret: ByteArray): String {
+        val iv = ByteArray(16)
+        random.nextBytes(iv)
+        val cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
+        cipher.init(Cipher.ENCRYPT_MODE, SecretKeySpec(sharedSecret, "AES"), IvParameterSpec(iv))
+        val ivBase64 = Base64.getEncoder().encodeToString(iv)
+        val encryptedMsg = cipher.doFinal(msg.toByteArray())
+        val encryptedMsgBase64 = Base64.getEncoder().encodeToString(encryptedMsg)
+        return "$encryptedMsgBase64?iv=$ivBase64"
+    }
+
+    fun decrypt(msg: String, privateKey: ByteArray, pubKey: ByteArray): String {
+        val sharedSecret = getSharedSecret(privateKey, pubKey)
+        return decrypt(msg, sharedSecret)
+    }
+
+    fun decrypt(msg: String, sharedSecret: ByteArray): String {
+        val parts = msg.split("?iv=")
+        val iv = parts[1].run { Base64.getDecoder().decode(this) }
+        val encryptedMsg = parts.first().run { Base64.getDecoder().decode(this) }
+        val cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
+        cipher.init(Cipher.DECRYPT_MODE, SecretKeySpec(sharedSecret, "AES"), IvParameterSpec(iv))
+        return String(cipher.doFinal(encryptedMsg))
+    }
+
+    fun verifySignature(
+        signature: ByteArray,
+        hash: ByteArray,
+        pubKey: ByteArray
+    ): Boolean {
+        return secp256k1.verifySchnorr(signature, hash, pubKey)
+    }
+
+    fun sha256(data: ByteArray): ByteArray {
+        // Creates a new buffer every time
+        return MessageDigest.getInstance("SHA-256").digest(data)
+    }
+
+    /**
+     * @return 32B shared secret
+     */
+    fun getSharedSecret(privateKey: ByteArray, pubKey: ByteArray): ByteArray =
+        secp256k1.pubKeyTweakMul(Hex.decode("02") + pubKey, privateKey).copyOfRange(1, 33)
+}
+
+fun Int.toByteArray(): ByteArray {
+    val bytes = ByteArray(4)
+    (0..3).forEach {
+        bytes[3 - it] = ((this ushr (8 * it)) and 0xFFFF).toByte()
+    }
+    return bytes
+}

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

@@ -6,7 +6,6 @@ import android.util.Log
 import com.vitorpamplona.amethyst.model.toHexKey
 import com.vitorpamplona.amethyst.ui.actions.ImageDownloader
 import io.trbl.blurhash.BlurHash
-import java.security.MessageDigest
 import kotlin.math.roundToInt
 
 class FileHeader(
@@ -45,9 +44,7 @@ class FileHeader(
             onError: () -> Unit
         ) {
             try {
-                val sha256 = MessageDigest.getInstance("SHA-256")
-
-                val hash = sha256.digest(data).toHexKey()
+                val hash = CryptoUtils.sha256(data).toHexKey()
                 val size = data.size
 
                 val (blurHash, dim) = if (mimeType?.startsWith("image/") == true) {

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

@@ -5,19 +5,29 @@ import okhttp3.OkHttpClient
 import java.net.InetSocketAddress
 import java.net.Proxy
 import java.time.Duration
+import kotlin.properties.Delegates
 
 object HttpClient {
-    private var proxy: Proxy? = null
+    var proxyChangeListeners = ArrayList<() -> Unit>()
+
+    // fires off every time value of the property changes
+    private var internalProxy: Proxy? by Delegates.observable(null) { _, oldValue, newValue ->
+        if (oldValue != newValue) {
+            proxyChangeListeners.forEach {
+                it()
+            }
+        }
+    }
 
     fun start(account: Account?) {
-        this.proxy = account?.proxy
+        this.internalProxy = account?.proxy
     }
 
     fun getHttpClient(): OkHttpClient {
-        val seconds = if (proxy != null) 20L else 10L
+        val seconds = if (internalProxy != null) 20L else 10L
         val duration = Duration.ofSeconds(seconds)
         return OkHttpClient.Builder()
-            .proxy(proxy)
+            .proxy(internalProxy)
             .readTimeout(duration)
             .connectTimeout(duration)
             .writeTimeout(duration)
@@ -25,7 +35,7 @@ object HttpClient {
     }
 
     fun getProxy(): Proxy? {
-        return proxy
+        return internalProxy
     }
 
     fun initProxy(useProxy: Boolean, hostname: String, port: Int): Proxy? {

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

@@ -0,0 +1,34 @@
+package com.vitorpamplona.amethyst.service
+
+import com.vitorpamplona.amethyst.model.toHexKey
+
+class KeyPair(
+    privKey: ByteArray? = null,
+    pubKey: ByteArray? = null
+) {
+    val privKey: ByteArray?
+    val pubKey: ByteArray
+
+    init {
+        if (privKey == null) {
+            if (pubKey == null) {
+                // create new, random keys
+                this.privKey = CryptoUtils.privkeyCreate()
+                this.pubKey = CryptoUtils.pubkeyCreate(this.privKey)
+            } else {
+                // this is a read-only account
+                check(pubKey.size == 32)
+                this.privKey = null
+                this.pubKey = pubKey
+            }
+        } else {
+            // as private key is provided, ignore the public key and set keys according to private key
+            this.privKey = privKey
+            this.pubKey = CryptoUtils.pubkeyCreate(privKey)
+        }
+    }
+
+    override fun toString(): String {
+        return "KeyPair(privateKey=${privKey?.toHexKey()}, publicKey=${pubKey.toHexKey()}"
+    }
+}

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

@@ -44,17 +44,23 @@ object NostrChatroomListDataSource : NostrDataSource("MailBoxFeed") {
         )
     )
 
-    fun createMyChannelsFilter() = TypedFilter(
-        types = COMMON_FEED_TYPES, // Metadata comes from any relay
-        filter = JsonFilter(
-            kinds = listOf(ChannelCreateEvent.kind),
-            ids = account.followingChannels.toList(),
-            since = latestEOSEs.users[account.userProfile()]?.followList?.get(chatRoomList)?.relayList
-        )
-    )
+    fun createMyChannelsFilter(): TypedFilter {
+        val followingEvents = account.selectedChatsFollowList()
 
-    fun createLastChannelInfoFilter(): List<TypedFilter> {
-        return account.followingChannels.map {
+        return TypedFilter(
+            types = COMMON_FEED_TYPES, // Metadata comes from any relay
+            filter = JsonFilter(
+                kinds = listOf(ChannelCreateEvent.kind),
+                ids = followingEvents.toList(),
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(chatRoomList)?.relayList
+            )
+        )
+    }
+
+    fun createLastChannelInfoFilter(): List<TypedFilter>? {
+        val followingEvents = account.selectedChatsFollowList()
+
+        return followingEvents.map {
             TypedFilter(
                 types = COMMON_FEED_TYPES, // Metadata comes from any relay
                 filter = JsonFilter(
@@ -66,8 +72,10 @@ object NostrChatroomListDataSource : NostrDataSource("MailBoxFeed") {
         }
     }
 
-    fun createLastMessageOfEachChannelFilter(): List<TypedFilter> {
-        return account.followingChannels.map {
+    fun createLastMessageOfEachChannelFilter(): List<TypedFilter>? {
+        val followingEvents = account.selectedChatsFollowList()
+
+        return followingEvents.map {
             TypedFilter(
                 types = setOf(FeedType.PUBLIC_CHATS),
                 filter = JsonFilter(

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

@@ -17,13 +17,12 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
     lateinit var account: Account
 
     val latestEOSEs = EOSEAccount()
-    val dataSource = "Discovery"
 
     fun createLiveStreamFilter(): TypedFilter {
         val follows = account.selectedUsersFollowList(account.defaultDiscoveryFollowList)
 
         val followKeys = follows?.map {
-            it.substring(0, 6)
+            it.substring(0, 8)
         }
 
         return TypedFilter(
@@ -32,7 +31,7 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
                 authors = followKeys,
                 kinds = listOf(LiveActivitiesChatMessageEvent.kind, LiveActivitiesEvent.kind),
                 limit = 300,
-                since = latestEOSEs.users[account.userProfile()]?.followList?.get(dataSource)?.relayList
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
             )
         )
     }
@@ -41,7 +40,7 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
         val follows = account.selectedUsersFollowList(account.defaultDiscoveryFollowList)
 
         val followKeys = follows?.map {
-            it.substring(0, 6)
+            it.substring(0, 8)
         }
 
         return TypedFilter(
@@ -50,7 +49,7 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
                 authors = followKeys,
                 kinds = listOf(ChannelCreateEvent.kind, ChannelMetadataEvent.kind, ChannelMessageEvent.kind),
                 limit = 300,
-                since = latestEOSEs.users[account.userProfile()]?.followList?.get(dataSource)?.relayList
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
             )
         )
     }
@@ -59,7 +58,7 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
         val follows = account.selectedUsersFollowList(account.defaultDiscoveryFollowList)
 
         val followKeys = follows?.map {
-            it.substring(0, 6)
+            it.substring(0, 8)
         }
 
         return TypedFilter(
@@ -68,7 +67,7 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
                 authors = followKeys,
                 kinds = listOf(CommunityDefinitionEvent.kind, CommunityPostApprovalEvent.kind),
                 limit = 300,
-                since = latestEOSEs.users[account.userProfile()]?.followList?.get(dataSource)?.relayList
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
             )
         )
     }
@@ -88,7 +87,7 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
                     }.flatten()
                 ),
                 limit = 300,
-                since = latestEOSEs.users[account.userProfile()]?.followList?.get(dataSource)?.relayList
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
             )
         )
     }
@@ -108,7 +107,7 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
                     }.flatten()
                 ),
                 limit = 300,
-                since = latestEOSEs.users[account.userProfile()]?.followList?.get(dataSource)?.relayList
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
             )
         )
     }
@@ -128,12 +127,14 @@ object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
                     }.flatten()
                 ),
                 limit = 300,
-                since = latestEOSEs.users[account.userProfile()]?.followList?.get(dataSource)?.relayList
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
             )
         )
     }
 
-    val discoveryFeedChannel = requestNewChannel()
+    val discoveryFeedChannel = requestNewChannel() { time, relayUrl ->
+        latestEOSEs.addOrUpdate(account.userProfile(), account.defaultDiscoveryFollowList, relayUrl, time)
+    }
 
     override fun updateChannelFilters() {
         discoveryFeedChannel.typedFilters = listOfNotNull(

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

@@ -4,6 +4,7 @@ import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.UserState
 import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
 import com.vitorpamplona.amethyst.service.model.ClassifiedsEvent
+import com.vitorpamplona.amethyst.service.model.CommunityPostApprovalEvent
 import com.vitorpamplona.amethyst.service.model.GenericRepostEvent
 import com.vitorpamplona.amethyst.service.model.HighlightEvent
 import com.vitorpamplona.amethyst.service.model.LiveActivitiesChatMessageEvent
@@ -103,11 +104,37 @@ object NostrHomeDataSource : NostrDataSource("HomeFeed") {
         )
     }
 
+    fun createFollowCommunitiesFilter(): TypedFilter? {
+        val communitiesToLoad = account.selectedCommunitiesFollowList(account.defaultHomeFollowList) ?: emptySet()
+
+        if (communitiesToLoad.isEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.FOLLOWS),
+            filter = JsonFilter(
+                kinds = listOf(
+                    TextNoteEvent.kind,
+                    LongTextNoteEvent.kind,
+                    ClassifiedsEvent.kind,
+                    HighlightEvent.kind,
+                    AudioTrackEvent.kind,
+                    PinListEvent.kind,
+                    CommunityPostApprovalEvent.kind
+                ),
+                tags = mapOf(
+                    "a" to communitiesToLoad.toList()
+                ),
+                limit = 100,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultHomeFollowList)?.relayList
+            )
+        )
+    }
+
     val followAccountChannel = requestNewChannel { time, relayUrl ->
         latestEOSEs.addOrUpdate(account.userProfile(), account.defaultHomeFollowList, relayUrl, time)
     }
 
     override fun updateChannelFilters() {
-        followAccountChannel.typedFilters = listOfNotNull(createFollowAccountsFilter(), createFollowTagsFilter()).ifEmpty { null }
+        followAccountChannel.typedFilters = listOfNotNull(createFollowAccountsFilter(), createFollowCommunitiesFilter(), createFollowTagsFilter()).ifEmpty { null }
     }
 }

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

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.service
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.service.model.FileHeaderEvent
 import com.vitorpamplona.amethyst.service.model.FileStorageHeaderEvent
+import com.vitorpamplona.amethyst.service.relays.EOSEAccount
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.JsonFilter
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
@@ -10,6 +11,8 @@ import com.vitorpamplona.amethyst.service.relays.TypedFilter
 object NostrVideoDataSource : NostrDataSource("VideoFeed") {
     lateinit var account: Account
 
+    val latestEOSEs = EOSEAccount()
+
     fun createContextualFilter(): TypedFilter? {
         val follows = account.selectedUsersFollowList(account.defaultStoriesFollowList)
 
@@ -22,7 +25,8 @@ object NostrVideoDataSource : NostrDataSource("VideoFeed") {
             filter = JsonFilter(
                 authors = followKeys,
                 kinds = listOf(FileHeaderEvent.kind, FileStorageHeaderEvent.kind),
-                limit = 200
+                limit = 200,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultStoriesFollowList)?.relayList
             )
         )
     }
@@ -41,12 +45,15 @@ object NostrVideoDataSource : NostrDataSource("VideoFeed") {
                         listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
                     }.flatten()
                 ),
-                limit = 100
+                limit = 100,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultStoriesFollowList)?.relayList
             )
         )
     }
 
-    val videoFeedChannel = requestNewChannel()
+    val videoFeedChannel = requestNewChannel() { time, relayUrl ->
+        latestEOSEs.addOrUpdate(account.userProfile(), account.defaultStoriesFollowList, relayUrl, time)
+    }
 
     override fun updateChannelFilters() {
         videoFeedChannel.typedFilters = listOfNotNull(createContextualFilter(), createFollowTagsFilter()).ifEmpty { null }

app/src/main/java/com/vitorpamplona/amethyst/service/connectivitystatus/ConnectivityStatus.kt

@@ -7,11 +7,9 @@ object ConnectivityStatus {
     private val onMobileData = mutableStateOf(false)
     val isOnMobileData: MutableState<Boolean> = onMobileData
 
-    private val onWifi = mutableStateOf(false)
-    val isOnWifi: MutableState<Boolean> = onWifi
-
     fun updateConnectivityStatus(isOnMobileData: Boolean, isOnWifi: Boolean) {
-        onMobileData.value = isOnMobileData
-        onWifi.value = isOnWifi
+        if (onMobileData.value != isOnMobileData) {
+            onMobileData.value = isOnMobileData
+        }
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/lnurl/LightningAddressResolver.kt

@@ -2,14 +2,15 @@ package com.vitorpamplona.amethyst.service.lnurl
 
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.vitorpamplona.amethyst.BuildConfig
+import com.vitorpamplona.amethyst.service.Bech32
 import com.vitorpamplona.amethyst.service.HttpClient
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
+import com.vitorpamplona.amethyst.service.toLnUrl
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
-import nostr.postr.Bech32
 import okhttp3.Call
 import okhttp3.Callback
 import okhttp3.Request
@@ -131,7 +132,7 @@ class LightningAddressResolver() {
         fetchLightningAddressJson(
             lnaddress,
             onSuccess = {
-                onSuccess(Bech32.encodeBytes("lnurl", it.toByteArray(), Bech32.Encoding.Bech32))
+                onSuccess(it.toByteArray().toLnUrl())
             },
             onError = onError
         )

app/src/main/java/com/vitorpamplona/amethyst/service/model/ATag.kt

@@ -4,11 +4,11 @@ import android.util.Log
 import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.hexToByteArray
 import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.bechToBytes
 import com.vitorpamplona.amethyst.service.nip19.Tlv
+import com.vitorpamplona.amethyst.service.toByteArray
+import com.vitorpamplona.amethyst.service.toNAddress
 import fr.acinq.secp256k1.Hex
-import nostr.postr.Bech32
-import nostr.postr.bechToBytes
-import nostr.postr.toByteArray
 
 @Immutable
 data class ATag(val kind: Int, val pubKeyHex: String, val dTag: String, val relay: String?) {
@@ -30,7 +30,7 @@ data class ATag(val kind: Int, val pubKeyHex: String, val dTag: String, val rela
             byteArrayOf(Tlv.Type.AUTHOR.id, author.size.toByte()) + author +
             byteArrayOf(Tlv.Type.KIND.id, kind.size.toByte()) + kind
 
-        return Bech32.encodeBytes(hrp = "naddr", fullArray, Bech32.Encoding.Bech32)
+        return fullArray.toNAddress()
     }
 
     companion object {

app/src/main/java/com/vitorpamplona/amethyst/service/model/AudioTrackEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class AudioTrackEvent(
@@ -52,9 +52,9 @@ class AudioTrackEvent(
                 subject?.let { listOf(SUBJECT, it) }
             )
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, "")
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return AudioTrackEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/BadgeProfilesEvent.kt

@@ -25,5 +25,6 @@ class BadgeProfilesEvent(
 
     companion object {
         const val kind = 30008
+        const val standardDTAg = "profile_badges"
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/model/BookmarkListEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class BookmarkListEvent(
@@ -32,7 +32,7 @@ class BookmarkListEvent(
             privateKey: ByteArray,
             createdAt: Long = TimeUtils.now()
         ): BookmarkListEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey)
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey)
             val content = createPrivateTags(privEvents, privUsers, privAddresses, privateKey, pubKey)
 
             val tags = mutableListOf<List<String>>()
@@ -49,7 +49,7 @@ class BookmarkListEvent(
             }
 
             val id = generateId(pubKey.toHexKey(), createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return BookmarkListEvent(id.toHexKey(), pubKey.toHexKey(), createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ChannelCreateEvent.kt

@@ -5,7 +5,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelCreateEvent(
@@ -38,10 +38,10 @@ class ChannelCreateEvent(
                 ""
             }
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = emptyList<List<String>>()
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ChannelCreateEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ChannelHideMessageEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelHideMessageEvent(
@@ -27,14 +27,14 @@ class ChannelHideMessageEvent(
         const val kind = 43
 
         fun create(reason: String, messagesToHide: List<String>?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ChannelHideMessageEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags =
                 messagesToHide?.map {
                     listOf("e", it)
                 } ?: emptyList()
 
             val id = generateId(pubKey, createdAt, kind, tags, reason)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ChannelHideMessageEvent(id.toHexKey(), pubKey, createdAt, tags, reason, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ChannelMessageEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelMessageEvent(
@@ -39,7 +39,7 @@ class ChannelMessageEvent(
             zapRaiserAmount: Long?
         ): ChannelMessageEvent {
             val content = message
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf(
                 listOf("e", channel, "", "root")
             )
@@ -60,7 +60,7 @@ class ChannelMessageEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ChannelMessageEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ChannelMetadataEvent.kt

@@ -5,7 +5,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelMetadataEvent(
@@ -37,10 +37,10 @@ class ChannelMetadataEvent(
                     ""
                 }
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = listOf(listOf("e", originalChannelIdHex, "", "root"))
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ChannelMetadataEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ChannelMuteUserEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelMuteUserEvent(
@@ -28,14 +28,14 @@ class ChannelMuteUserEvent(
 
         fun create(reason: String, usersToMute: List<String>?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ChannelMuteUserEvent {
             val content = reason
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags =
                 usersToMute?.map {
                     listOf("p", it)
                 } ?: emptyList()
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ChannelMuteUserEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ClassifiedsEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ClassifiedsEvent(
@@ -66,9 +66,9 @@ class ClassifiedsEvent(
             publishedAt?.let { tags.add(listOf("publishedAt", it.toString())) }
             title?.let { tags.add(listOf("title", it)) }
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, "")
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ClassifiedsEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/CommunityDefinitionEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class CommunityDefinitionEvent(
@@ -33,9 +33,9 @@ class CommunityDefinitionEvent(
             createdAt: Long = TimeUtils.now()
         ): CommunityDefinitionEvent {
             val tags = mutableListOf<List<String>>()
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, "")
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return CommunityDefinitionEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/CommunityPostApprovalEvent.kt

@@ -5,8 +5,8 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import com.vitorpamplona.amethyst.service.relays.Client
-import nostr.postr.Utils
 
 @Immutable
 class CommunityPostApprovalEvent(
@@ -53,10 +53,10 @@ class CommunityPostApprovalEvent(
             val replyToAuthor = listOf("p", approvedPost.pubKey())
             val kind = listOf("k", "${approvedPost.kind()}")
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags: List<List<String>> = listOf(communities, replyToPost, replyToAuthor, kind)
             val id = generateId(pubKey, createdAt, GenericRepostEvent.kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return GenericRepostEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ContactListEvent.kt

@@ -8,7 +8,7 @@ import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.decodePublicKey
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 data class Contact(val pubKeyHex: String, val relayUri: String?)
@@ -39,6 +39,10 @@ class ContactListEvent(
         unverifiedFollowTagSet().map { it.lowercase() }.toSet()
     }
 
+    val verifiedFollowCommunitySet: Set<String> by lazy {
+        unverifiedFollowAddressSet().toSet()
+    }
+
     val verifiedFollowKeySetAndMe: Set<HexKey> by lazy {
         verifiedFollowKeySet + pubKey
     }
@@ -46,6 +50,8 @@ class ContactListEvent(
     fun unverifiedFollowKeySet() = tags.filter { it[0] == "p" }.mapNotNull { it.getOrNull(1) }
     fun unverifiedFollowTagSet() = tags.filter { it[0] == "t" }.mapNotNull { it.getOrNull(1) }
 
+    fun unverifiedFollowAddressSet() = tags.filter { it[0] == "a" }.mapNotNull { it.getOrNull(1) }
+
     fun follows() = tags.filter { it[0] == "p" }.mapNotNull {
         try {
             Contact(decodePublicKey(it[1]).toHexKey(), it.getOrNull(2))
@@ -73,14 +79,22 @@ class ContactListEvent(
     companion object {
         const val kind = 3
 
-        fun create(follows: List<Contact>, followTags: List<String>, relayUse: Map<String, ReadWrite>?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+        fun createFromScratch(
+            followUsers: List<Contact>,
+            followTags: List<String>,
+            followCommunities: List<ATag>,
+            followEvents: List<String>,
+            relayUse: Map<String, ReadWrite>?,
+            privateKey: ByteArray,
+            createdAt: Long = TimeUtils.now()
+        ): ContactListEvent {
             val content = if (relayUse != null) {
                 gson.toJson(relayUse)
             } else {
                 ""
             }
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
-            val tags = follows.map {
+
+            val tags = followUsers.map {
                 if (it.relayUri != null) {
                     listOf("p", it.pubKeyHex, it.relayUri)
                 } else {
@@ -88,10 +102,131 @@ class ContactListEvent(
                 }
             } + followTags.map {
                 listOf("t", it)
+            } + followEvents.map {
+                listOf("e", it)
+            } + followCommunities.map {
+                if (it.relay != null) {
+                    listOf("a", it.toTag(), it.relay)
+                } else {
+                    listOf("a", it.toTag())
+                }
             }
 
+            return create(
+                content = content,
+                tags = tags,
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun followUser(earlierVersion: ContactListEvent, pubKeyHex: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (earlierVersion.isTaggedUser(pubKeyHex)) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.plus(element = listOf("p", pubKeyHex)),
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun unfollowUser(earlierVersion: ContactListEvent, pubKeyHex: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (!earlierVersion.isTaggedUser(pubKeyHex)) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.filter { it.size > 1 && it[1] != pubKeyHex },
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun followHashtag(earlierVersion: ContactListEvent, hashtag: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (earlierVersion.isTaggedHash(hashtag)) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.plus(element = listOf("t", hashtag)),
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun unfollowHashtag(earlierVersion: ContactListEvent, hashtag: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (!earlierVersion.isTaggedHash(hashtag)) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.filter { it.size > 1 && it[1] != hashtag },
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun followEvent(earlierVersion: ContactListEvent, idHex: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (earlierVersion.isTaggedEvent(idHex)) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.plus(element = listOf("e", idHex)),
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun unfollowEvent(earlierVersion: ContactListEvent, idHex: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (!earlierVersion.isTaggedEvent(idHex)) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.filter { it.size > 1 && it[1] != idHex },
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun followAddressableEvent(earlierVersion: ContactListEvent, aTag: ATag, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (earlierVersion.isTaggedAddressableNote(aTag.toTag())) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.plus(element = listOfNotNull("a", aTag.toTag(), aTag.relay)),
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun unfollowAddressableEvent(earlierVersion: ContactListEvent, aTag: ATag, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (!earlierVersion.isTaggedAddressableNote(aTag.toTag())) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.filter { it.size > 1 && it[1] != aTag.toTag() },
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun updateRelayList(earlierVersion: ContactListEvent, relayUse: Map<String, ReadWrite>?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            val content = if (relayUse != null) {
+                gson.toJson(relayUse)
+            } else {
+                ""
+            }
+
+            return create(
+                content = content,
+                tags = earlierVersion.tags,
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun create(content: String, tags: List<List<String>>, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ContactListEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/DeletionEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class DeletionEvent(
@@ -22,10 +22,10 @@ class DeletionEvent(
 
         fun create(deleteEvents: List<String>, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): DeletionEvent {
             val content = ""
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = deleteEvents.map { listOf("e", it) }
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return DeletionEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/EmojiPackEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class EmojiPackEvent(
@@ -25,13 +25,13 @@ class EmojiPackEvent(
             createdAt: Long = TimeUtils.now()
         ): EmojiPackEvent {
             val content = ""
-            val pubKey = Utils.pubkeyCreate(privateKey)
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey)
 
             val tags = mutableListOf<List<String>>()
             tags.add(listOf("d", name))
 
             val id = generateId(pubKey.toHexKey(), createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return EmojiPackEvent(id.toHexKey(), pubKey.toHexKey(), createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/EmojiPackSelectionEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class EmojiPackSelectionEvent(
@@ -28,7 +28,7 @@ class EmojiPackSelectionEvent(
             createdAt: Long = TimeUtils.now()
         ): EmojiPackSelectionEvent {
             val msg = ""
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf<List<String>>()
 
             listOfEmojiPacks?.forEach {
@@ -36,7 +36,7 @@ class EmojiPackSelectionEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, msg)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return EmojiPackSelectionEvent(id.toHexKey(), pubKey, createdAt, tags, msg, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/Event.kt

@@ -7,13 +7,12 @@ import com.google.gson.annotations.SerializedName
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
+import com.vitorpamplona.amethyst.service.nip19.Nip19
 import fr.acinq.secp256k1.Hex
 import fr.acinq.secp256k1.Secp256k1
-import nostr.postr.Utils
-import nostr.postr.toHex
 import java.lang.reflect.Type
 import java.math.BigDecimal
-import java.security.MessageDigest
 import java.util.*
 
 @Immutable
@@ -44,10 +43,10 @@ open class Event(
 
     fun hasAnyTaggedUser() = tags.any { it.size > 1 && it[0] == "p" }
 
-    fun taggedUsers() = tags.filter { it.size > 1 && it[0] == "p" }.map { it[1] }
-    fun taggedEvents() = tags.filter { it.size > 1 && it[0] == "e" }.map { it[1] }
+    override fun taggedUsers() = tags.filter { it.size > 1 && it[0] == "p" }.map { it[1] }
+    override fun taggedEvents() = tags.filter { it.size > 1 && it[0] == "e" }.map { it[1] }
 
-    fun taggedUrls() = tags.filter { it.size > 1 && it[0] == "r" }.map { it[1] }
+    override fun taggedUrls() = tags.filter { it.size > 1 && it[0] == "r" }.map { it[1] }
 
     override fun taggedEmojis() = tags.filter { it.size > 2 && it[0] == "emoji" }.map { EmojiUrl(it[1], it[2]) }
 
@@ -63,7 +62,7 @@ open class Event(
 
     override fun zapAddress() = tags.firstOrNull { it.size > 1 && it[0] == "zap" }?.get(1)
 
-    fun taggedAddresses() = tags.filter { it.size > 1 && it[0] == "a" }.mapNotNull {
+    override fun taggedAddresses() = tags.filter { it.size > 1 && it[0] == "a" }.mapNotNull {
         val aTagValue = it[1]
         val relay = it.getOrNull(2)
 
@@ -76,8 +75,12 @@ open class Event(
 
     override fun isTaggedUser(idHex: String) = tags.any { it.size > 1 && it[0] == "p" && it[1] == idHex }
 
+    override fun isTaggedEvent(idHex: String) = tags.any { it.size > 1 && it[0] == "e" && it[1] == idHex }
+
     override fun isTaggedAddressableNote(idHex: String) = tags.any { it.size > 1 && it[0] == "a" && it[1] == idHex }
 
+    override fun isTaggedAddressableNotes(idHexes: Set<String>) = tags.any { it.size > 1 && it[0] == "a" && it[1] in idHexes }
+
     override fun isTaggedHash(hashtag: String) = tags.any { it.size > 1 && it[0] == "t" && it[1].equals(hashtag, true) }
     override fun isTaggedHashes(hashtags: Set<String>) = tags.any { it.size > 1 && it[0] == "t" && it[1].lowercase() in hashtags }
     override fun firstIsTaggedHashes(hashtags: Set<String>) = tags.firstOrNull { it.size > 1 && it[0] == "t" && it[1].lowercase() in hashtags }?.getOrNull(1)
@@ -128,6 +131,18 @@ open class Event(
         }
     }
 
+    open fun toNIP19(): String {
+        return if (this is AddressableEvent) {
+            ATag(kind, pubKey, dTag(), null).toNAddr()
+        } else {
+            Nip19.createNEvent(id, pubKey, kind, null)
+        }
+    }
+
+    fun toNostrUri(): String {
+        return "nostr:${toNIP19()}"
+    }
+
     /**
      * Checks if the ID is correct and then if the pubKey's secret key signed the event.
      */
@@ -141,14 +156,14 @@ open class Event(
                 """.trimIndent()
             )
         }
-        if (!secp256k1.verifySchnorr(Hex.decode(sig), Hex.decode(id), Hex.decode(pubKey))) {
+        if (!CryptoUtils.verifySignature(Hex.decode(sig), Hex.decode(id), Hex.decode(pubKey))) {
             throw Exception("""Bad signature!""")
         }
     }
 
     override fun hasValidSignature(): Boolean {
         return try {
-            id.contentEquals(generateId()) && secp256k1.verifySchnorr(Hex.decode(sig), Hex.decode(id), Hex.decode(pubKey))
+            id.contentEquals(generateId()) && CryptoUtils.verifySignature(Hex.decode(sig), Hex.decode(id), Hex.decode(pubKey))
         } catch (e: Exception) {
             Log.e("Event", "Fail checking if event $id has a valid signature", e)
             false
@@ -166,7 +181,7 @@ open class Event(
             .replace("\\u2028", "\u2028")
             .replace("\\u2029", "\u2029")
 
-        return MessageDigest.getInstance("SHA-256").digest(rawEventJson.toByteArray()).toHexKey()
+        return CryptoUtils.sha256(rawEventJson.toByteArray()).toHexKey()
     }
 
     private class EventDeserializer : JsonDeserializer<Event> {
@@ -234,7 +249,7 @@ open class Event(
             src: ByteArray,
             typeOfSrc: Type?,
             context: JsonSerializationContext?
-        ) = JsonPrimitive(src.toHex())
+        ) = JsonPrimitive(src.toHexKey())
     }
 
     companion object {
@@ -288,6 +303,7 @@ open class Event(
             LnZapRequestEvent.kind -> LnZapRequestEvent(id, pubKey, createdAt, tags, content, sig)
             LongTextNoteEvent.kind -> LongTextNoteEvent(id, pubKey, createdAt, tags, content, sig)
             MetadataEvent.kind -> MetadataEvent(id, pubKey, createdAt, tags, content, sig)
+            NNSEvent.kind -> NNSEvent(id, pubKey, createdAt, tags, content, sig)
             PeopleListEvent.kind -> PeopleListEvent(id, pubKey, createdAt, tags, content, sig)
             PinListEvent.kind -> PinListEvent(id, pubKey, createdAt, tags, content, sig)
             PollNoteEvent.kind -> PollNoteEvent(id, pubKey, createdAt, tags, content, sig)
@@ -319,13 +335,13 @@ open class Event(
                 .replace("\\u2028", "\u2028")
                 .replace("\\u2029", "\u2029")
 
-            return MessageDigest.getInstance("SHA-256").digest(rawEventJson.toByteArray())
+            return CryptoUtils.sha256(rawEventJson.toByteArray())
         }
 
         fun create(privateKey: ByteArray, kind: Int, tags: List<List<String>> = emptyList(), content: String = "", createdAt: Long = TimeUtils.now()): Event {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = Companion.generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey).toHexKey()
+            val sig = CryptoUtils.sign(id, privateKey).toHexKey()
             return Event(id.toHexKey(), pubKey, createdAt, kind, tags, content, sig)
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/EventInterface.kt

@@ -27,7 +27,11 @@ interface EventInterface {
     fun hasValidSignature(): Boolean
 
     fun isTaggedUser(idHex: String): Boolean
+
+    fun isTaggedEvent(idHex: String): Boolean
+
     fun isTaggedAddressableNote(idHex: String): Boolean
+    fun isTaggedAddressableNotes(idHexes: Set<String>): Boolean
 
     fun isTaggedHash(hashtag: String): Boolean
     fun isTaggedHashes(hashtags: Set<String>): Boolean
@@ -46,6 +50,11 @@ interface EventInterface {
     fun isSensitive(): Boolean
     fun zapraiserAmount(): Long?
 
+    fun taggedAddresses(): List<ATag>
+    fun taggedUsers(): List<HexKey>
+    fun taggedEvents(): List<HexKey>
+    fun taggedUrls(): List<String>
+
     fun taggedEmojis(): List<EmojiUrl>
     fun matchTag1With(text: String): Boolean
 }

app/src/main/java/com/vitorpamplona/amethyst/service/model/FileHeaderEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class FileHeaderEvent(
@@ -74,9 +74,9 @@ class FileHeaderEvent(
             )
 
             val content = description ?: ""
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return FileHeaderEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/FileStorageEvent.kt

@@ -5,7 +5,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import java.util.Base64
 
 @Immutable
@@ -51,9 +51,9 @@ class FileStorageEvent(
             )
 
             val content = encode(data)
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return FileStorageEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/FileStorageHeaderEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class FileStorageHeaderEvent(
@@ -74,9 +74,9 @@ class FileStorageHeaderEvent(
             )
 
             val content = description ?: ""
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return FileStorageHeaderEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/GeneralListEvent.kt

@@ -5,7 +5,7 @@ import androidx.compose.runtime.Immutable
 import com.google.gson.reflect.TypeToken
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.hexToByteArray
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 abstract class GeneralListEvent(
@@ -28,9 +28,9 @@ abstract class GeneralListEvent(
         if (content.isBlank()) return null
 
         return try {
-            val sharedSecret = Utils.getSharedSecret(privKey, pubKey.hexToByteArray())
+            val sharedSecret = CryptoUtils.getSharedSecret(privKey, pubKey.hexToByteArray())
 
-            return Utils.decrypt(content, sharedSecret)
+            return CryptoUtils.decrypt(content, sharedSecret)
         } catch (e: Exception) {
             Log.w("GeneralList", "Error decrypting the message ${e.message} for ${dTag()}")
             null
@@ -54,7 +54,13 @@ abstract class GeneralListEvent(
         return privateTagsCache
     }
 
+    fun privateTagsOrEmpty(privKey: ByteArray): List<List<String>> {
+        return privateTags(privKey) ?: emptyList()
+    }
+
     fun privateTaggedUsers(privKey: ByteArray) = privateTags(privKey)?.filter { it.size > 1 && it[0] == "p" }?.map { it[1] }
+
+    fun privateHashtags(privKey: ByteArray) = privateTags(privKey)?.filter { it.size > 1 && it[0] == "t" }?.map { it[1] }
     fun privateTaggedEvents(privKey: ByteArray) = privateTags(privKey)?.filter { it.size > 1 && it[0] == "e" }?.map { it[1] }
     fun privateTaggedAddresses(privKey: ByteArray) = privateTags(privKey)?.filter { it.firstOrNull() == "a" }?.mapNotNull {
         val aTagValue = it.getOrNull(1)
@@ -84,11 +90,22 @@ abstract class GeneralListEvent(
             }
             val msg = gson.toJson(privTags)
 
-            return Utils.encrypt(
+            return CryptoUtils.encrypt(
                 msg,
                 privateKey,
                 pubKey
             )
         }
+
+        fun encryptTags(
+            privateTags: List<List<String>>? = null,
+            privateKey: ByteArray
+        ): String {
+            return CryptoUtils.encrypt(
+                msg = gson.toJson(privateTags),
+                privateKey = privateKey,
+                pubKey = CryptoUtils.pubkeyCreate(privateKey)
+            )
+        }
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/model/GenericRepostEvent.kt

@@ -4,8 +4,8 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import com.vitorpamplona.amethyst.service.relays.Client
-import nostr.postr.Utils
 
 @Immutable
 class GenericRepostEvent(
@@ -35,7 +35,7 @@ class GenericRepostEvent(
             val replyToPost = listOf("e", boostedPost.id())
             val replyToAuthor = listOf("p", boostedPost.pubKey())
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             var tags: List<List<String>> = listOf(replyToPost, replyToAuthor)
 
             if (boostedPost is AddressableEvent) {
@@ -45,7 +45,7 @@ class GenericRepostEvent(
             tags = tags + listOf(listOf("k", "${boostedPost.kind()}"))
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return GenericRepostEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/HTTPAuthorizationEvent.kt

@@ -4,8 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
-import java.security.MessageDigest
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class HTTPAuthorizationEvent(
@@ -27,11 +26,9 @@ class HTTPAuthorizationEvent(
             privateKey: ByteArray,
             createdAt: Long = TimeUtils.now()
         ): HTTPAuthorizationEvent {
-            val sha256 = MessageDigest.getInstance("SHA-256")
-
             var hash = ""
             body?.let {
-                hash = sha256.digest(it.toByteArray()).toHexKey()
+                hash = CryptoUtils.sha256(it.toByteArray()).toHexKey()
             }
 
             val tags = listOfNotNull(
@@ -40,9 +37,9 @@ class HTTPAuthorizationEvent(
                 listOf("payload", hash)
             )
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, "")
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return HTTPAuthorizationEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/HighlightEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class HighlightEvent(
@@ -30,10 +30,10 @@ class HighlightEvent(
             privateKey: ByteArray,
             createdAt: Long = TimeUtils.now()
         ): PollNoteEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf<List<String>>()
             val id = generateId(pubKey, createdAt, kind, tags, msg)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return PollNoteEvent(id.toHexKey(), pubKey, createdAt, tags, msg, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/LiveActivitiesChatMessageEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class LiveActivitiesChatMessageEvent(
@@ -54,7 +54,7 @@ class LiveActivitiesChatMessageEvent(
             zapRaiserAmount: Long?
         ): LiveActivitiesChatMessageEvent {
             val content = message
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf(
                 listOf("a", activity.toTag(), "", "root")
             )
@@ -75,7 +75,7 @@ class LiveActivitiesChatMessageEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return LiveActivitiesChatMessageEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/LiveActivitiesEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class LiveActivitiesEvent(
@@ -51,9 +51,9 @@ class LiveActivitiesEvent(
             createdAt: Long = TimeUtils.now()
         ): LiveActivitiesEvent {
             val tags = mutableListOf<List<String>>()
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, "")
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return LiveActivitiesEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapEventInterface.kt

@@ -14,8 +14,6 @@ interface LnZapEventInterface : EventInterface {
 
     fun zappedRequestAuthor(): String?
 
-    fun taggedAddresses(): List<ATag>
-
     fun amount(): BigDecimal?
 
     fun containedPost(): Event?

app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapPaymentRequestEvent.kt

@@ -10,7 +10,7 @@ import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.hexToByteArray
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import java.lang.reflect.Type
 
 @Immutable
@@ -35,9 +35,9 @@ class LnZapPaymentRequestEvent(
         }
 
         return try {
-            val sharedSecret = Utils.getSharedSecret(privKey, pubkey)
+            val sharedSecret = CryptoUtils.getSharedSecret(privKey, pubkey)
 
-            val jsonText = Utils.decrypt(content, sharedSecret)
+            val jsonText = CryptoUtils.decrypt(content, sharedSecret)
 
             val payInvoiceMethod = gson.fromJson(jsonText, Request::class.java)
 
@@ -59,10 +59,10 @@ class LnZapPaymentRequestEvent(
             privateKey: ByteArray,
             createdAt: Long = TimeUtils.now()
         ): LnZapPaymentRequestEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey)
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey)
             val serializedRequest = gson.toJson(PayInvoiceMethod.create(lnInvoice))
 
-            val content = Utils.encrypt(
+            val content = CryptoUtils.encrypt(
                 serializedRequest,
                 privateKey,
                 walletServicePubkey.hexToByteArray()
@@ -72,7 +72,7 @@ class LnZapPaymentRequestEvent(
             tags.add(listOf("p", walletServicePubkey))
 
             val id = generateId(pubKey.toHexKey(), createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return LnZapPaymentRequestEvent(id.toHexKey(), pubKey.toHexKey(), createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapPaymentResponseEvent.kt

@@ -8,7 +8,7 @@ import com.google.gson.JsonElement
 import com.google.gson.JsonParseException
 import com.google.gson.annotations.SerializedName
 import com.vitorpamplona.amethyst.model.HexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import java.lang.reflect.Type
 
 @Immutable
@@ -30,9 +30,9 @@ class LnZapPaymentResponseEvent(
 
     private fun decrypt(privKey: ByteArray, pubKey: ByteArray): String? {
         return try {
-            val sharedSecret = Utils.getSharedSecret(privKey, pubKey)
+            val sharedSecret = CryptoUtils.getSharedSecret(privKey, pubKey)
 
-            val retVal = Utils.decrypt(content, sharedSecret)
+            val retVal = CryptoUtils.decrypt(content, sharedSecret)
 
             if (retVal.startsWith(PrivateDmEvent.nip18Advertisement)) {
                 retVal.substring(16)

app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapRequestEvent.kt

@@ -2,12 +2,10 @@ package com.vitorpamplona.amethyst.service.model
 
 import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.*
-import nostr.postr.Bech32
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.Bech32
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import java.nio.charset.Charset
-import java.security.MessageDigest
 import java.security.SecureRandom
-import java.util.*
 import javax.crypto.BadPaddingException
 import javax.crypto.Cipher
 import javax.crypto.spec.IvParameterSpec
@@ -68,7 +66,7 @@ class LnZapRequestEvent(
         ): LnZapRequestEvent {
             var content = message
             var privkey = privateKey
-            var pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            var pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             var tags = listOf(
                 listOf("e", originalNote.id()),
                 listOf("p", originalNote.pubKey()),
@@ -82,8 +80,8 @@ class LnZapRequestEvent(
             }
             if (zapType == LnZapEvent.ZapType.ANONYMOUS) {
                 tags = tags + listOf(listOf("anon", ""))
-                privkey = Utils.privkeyCreate()
-                pubKey = Utils.pubkeyCreate(privkey).toHexKey()
+                privkey = CryptoUtils.privkeyCreate()
+                pubKey = CryptoUtils.pubkeyCreate(privkey).toHexKey()
             } else if (zapType == LnZapEvent.ZapType.PRIVATE) {
                 var encryptionPrivateKey = createEncryptionPrivateKey(privateKey.toHexKey(), originalNote.id(), createdAt)
                 var noteJson = (create(privkey, 9733, listOf(tags[0], tags[1]), message)).toJson()
@@ -91,10 +89,10 @@ class LnZapRequestEvent(
                 tags = tags + listOf(listOf("anon", encryptedContent))
                 content = "" // make sure public content is empty, as the content is encrypted
                 privkey = encryptionPrivateKey // sign event with generated privkey
-                pubKey = Utils.pubkeyCreate(encryptionPrivateKey).toHexKey() // updated event with according pubkey
+                pubKey = CryptoUtils.pubkeyCreate(encryptionPrivateKey).toHexKey() // updated event with according pubkey
             }
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privkey)
+            val sig = CryptoUtils.sign(id, privkey)
             return LnZapRequestEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
 
@@ -108,14 +106,14 @@ class LnZapRequestEvent(
         ): LnZapRequestEvent {
             var content = message
             var privkey = privateKey
-            var pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            var pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             var tags = listOf(
                 listOf("p", userHex),
                 listOf("relays") + relays
             )
             if (zapType == LnZapEvent.ZapType.ANONYMOUS) {
-                privkey = Utils.privkeyCreate()
-                pubKey = Utils.pubkeyCreate(privkey).toHexKey()
+                privkey = CryptoUtils.privkeyCreate()
+                pubKey = CryptoUtils.pubkeyCreate(privkey).toHexKey()
                 tags = tags + listOf(listOf("anon", ""))
             } else if (zapType == LnZapEvent.ZapType.PRIVATE) {
                 var encryptionPrivateKey = createEncryptionPrivateKey(privateKey.toHexKey(), userHex, createdAt)
@@ -124,21 +122,21 @@ class LnZapRequestEvent(
                 tags = tags + listOf(listOf("anon", encryptedContent))
                 content = ""
                 privkey = encryptionPrivateKey
-                pubKey = Utils.pubkeyCreate(encryptionPrivateKey).toHexKey()
+                pubKey = CryptoUtils.pubkeyCreate(encryptionPrivateKey).toHexKey()
             }
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privkey)
+            val sig = CryptoUtils.sign(id, privkey)
             return LnZapRequestEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
 
         fun createEncryptionPrivateKey(privkey: String, id: String, createdAt: Long): ByteArray {
             var str = privkey + id + createdAt.toString()
             var strbyte = str.toByteArray(Charset.forName("utf-8"))
-            return MessageDigest.getInstance("SHA-256").digest(strbyte)
+            return CryptoUtils.sha256(strbyte)
         }
 
         private fun encryptPrivateZapMessage(msg: String, privkey: ByteArray, pubkey: ByteArray): String {
-            var sharedSecret = Utils.getSharedSecret(privkey, pubkey)
+            var sharedSecret = CryptoUtils.getSharedSecret(privkey, pubkey)
             val iv = ByteArray(16)
             SecureRandom().nextBytes(iv)
 
@@ -157,7 +155,7 @@ class LnZapRequestEvent(
         }
 
         private fun decryptPrivateZapMessage(msg: String, privkey: ByteArray, pubkey: ByteArray): String {
-            var sharedSecret = Utils.getSharedSecret(privkey, pubkey)
+            var sharedSecret = CryptoUtils.getSharedSecret(privkey, pubkey)
             if (sharedSecret.size != 16 && sharedSecret.size != 32) {
                 throw IllegalArgumentException("Invalid shared secret size")
             }

app/src/main/java/com/vitorpamplona/amethyst/service/model/LongTextNoteEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class LongTextNoteEvent(
@@ -33,7 +33,7 @@ class LongTextNoteEvent(
         const val kind = 30023
 
         fun create(msg: String, replyTos: List<String>?, mentions: List<String>?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): LongTextNoteEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf<List<String>>()
             replyTos?.forEach {
                 tags.add(listOf("e", it))
@@ -42,7 +42,7 @@ class LongTextNoteEvent(
                 tags.add(listOf("p", it))
             }
             val id = generateId(pubKey, createdAt, kind, tags, msg)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return LongTextNoteEvent(id.toHexKey(), pubKey, createdAt, tags, msg, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/MetadataEvent.kt

@@ -10,7 +10,7 @@ import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.UserMetadata
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import java.io.ByteArrayInputStream
 
 @Stable
@@ -147,8 +147,8 @@ class MetadataEvent(
             UserMetadata::class.java
         )
     } catch (e: Exception) {
-        e.printStackTrace()
-        Log.w("MT", "Content Parse Error ${e.localizedMessage} $content")
+        // e.printStackTrace()
+        Log.w("MT", "Content Parse Error: ${e.localizedMessage} $content")
         null
     }
 
@@ -172,7 +172,7 @@ class MetadataEvent(
         }
 
         fun create(contactMetaData: String, identities: List<IdentityClaim>, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): MetadataEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf<List<String>>()
 
             identities.forEach {
@@ -180,7 +180,7 @@ class MetadataEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, contactMetaData)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return MetadataEvent(id.toHexKey(), pubKey, createdAt, tags, contactMetaData, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/MuteListEvent.kt

@@ -7,7 +7,7 @@ import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.hexToByteArray
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class MuteListEvent(
@@ -23,9 +23,9 @@ class MuteListEvent(
 
     fun plainContent(privKey: ByteArray): String? {
         return try {
-            val sharedSecret = Utils.getSharedSecret(privKey, pubKey.hexToByteArray())
+            val sharedSecret = CryptoUtils.getSharedSecret(privKey, pubKey.hexToByteArray())
 
-            return Utils.decrypt(content, sharedSecret)
+            return CryptoUtils.decrypt(content, sharedSecret)
         } catch (e: Exception) {
             Log.w("BookmarkList", "Error decrypting the message ${e.message}")
             null
@@ -73,7 +73,7 @@ class MuteListEvent(
             privateKey: ByteArray,
             createdAt: Long = TimeUtils.now()
         ): MuteListEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey)
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey)
 
             val privTags = mutableListOf<List<String>>()
             privEvents?.forEach {
@@ -87,7 +87,7 @@ class MuteListEvent(
             }
             val msg = gson.toJson(privTags)
 
-            val content = Utils.encrypt(
+            val content = CryptoUtils.encrypt(
                 msg,
                 privateKey,
                 pubKey
@@ -105,7 +105,7 @@ class MuteListEvent(
             }
 
             val id = generateId(pubKey.toHexKey(), createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return MuteListEvent(id.toHexKey(), pubKey.toHexKey(), createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/NNSEvent.kt

@@ -0,0 +1,40 @@
+package com.vitorpamplona.amethyst.service.model
+
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.amethyst.model.HexKey
+import com.vitorpamplona.amethyst.model.TimeUtils
+import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
+
+@Immutable
+class NNSEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: List<List<String>>,
+    content: String,
+    sig: HexKey
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), AddressableEvent {
+
+    override fun dTag() = tags.firstOrNull { it.size > 1 && it[0] == "d" }?.get(1) ?: ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
+
+    fun ip4() = tags.firstOrNull { it.size > 1 && it[0] == "ip4" }?.get(1)
+    fun ip6() = tags.firstOrNull { it.size > 1 && it[0] == "ip6" }?.get(1)
+    fun version() = tags.firstOrNull { it.size > 1 && it[0] == "version" }?.get(1)
+
+    companion object {
+        const val kind = 30053
+
+        fun create(
+            privateKey: ByteArray,
+            createdAt: Long = TimeUtils.now()
+        ): NNSEvent {
+            val tags = mutableListOf<List<String>>()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
+            val id = generateId(pubKey, createdAt, kind, tags, "")
+            val sig = CryptoUtils.sign(id, privateKey)
+            return NNSEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
+        }
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/service/model/PeopleListEvent.kt

@@ -4,7 +4,10 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
+import kotlinx.collections.immutable.ImmutableSet
+import kotlinx.collections.immutable.persistentSetOf
+import kotlinx.collections.immutable.toImmutableSet
 
 @Immutable
 class PeopleListEvent(
@@ -15,42 +18,133 @@ class PeopleListEvent(
     content: String,
     sig: HexKey
 ) : GeneralListEvent(id, pubKey, createdAt, kind, tags, content, sig) {
+    var publicAndPrivateUserCache: ImmutableSet<HexKey>? = null
+
+    fun publicAndPrivateUsers(privateKey: ByteArray?): ImmutableSet<HexKey> {
+        publicAndPrivateUserCache?.let {
+            return it
+        }
+
+        val privateUserList = privateKey?.let {
+            privateTagsOrEmpty(privKey = it).filter { it.size > 1 && it[0] == "p" }.map { it[1] }.toSet()
+        } ?: emptySet()
+        val publicUserList = tags.filter { it.size > 1 && it[0] == "p" }.map { it[1] }.toSet()
+
+        publicAndPrivateUserCache = (privateUserList + publicUserList).toImmutableSet()
+
+        return publicAndPrivateUserCache ?: persistentSetOf()
+    }
+
+    fun isTaggedUser(idHex: String, isPrivate: Boolean, privateKey: ByteArray): Boolean {
+        return if (isPrivate) {
+            privateTagsOrEmpty(privKey = privateKey).any { it.size > 1 && it[0] == "p" && it[1] == idHex }
+        } else {
+            isTaggedUser(idHex)
+        }
+    }
+
     companion object {
         const val kind = 30000
+        const val blockList = "mute"
 
-        fun create(
-            name: String = "",
-
-            events: List<String>? = null,
-            users: List<String>? = null,
-            addresses: List<ATag>? = null,
-
-            privEvents: List<String>? = null,
-            privUsers: List<String>? = null,
-            privAddresses: List<ATag>? = null,
-
-            privateKey: ByteArray,
-            createdAt: Long = TimeUtils.now()
-        ): PeopleListEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey)
-            val content = createPrivateTags(privEvents, privUsers, privAddresses, privateKey, pubKey)
-
-            val tags = mutableListOf<List<String>>()
-            tags.add(listOf("d", name))
-
-            events?.forEach {
-                tags.add(listOf("e", it))
-            }
-            users?.forEach {
-                tags.add(listOf("p", it))
-            }
-            addresses?.forEach {
-                tags.add(listOf("a", it.toTag()))
+        fun createListWithUser(name: String, pubKeyHex: String, isPrivate: Boolean, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): PeopleListEvent {
+            return if (isPrivate) {
+                create(
+                    content = encryptTags(listOf(listOf("p", pubKeyHex)), privateKey),
+                    tags = listOf(listOf("d", name)),
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
+            } else {
+                create(
+                    content = "",
+                    tags = listOf(listOf("d", name), listOf("p", pubKeyHex)),
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
             }
+        }
 
-            val id = generateId(pubKey.toHexKey(), createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
-            return PeopleListEvent(id.toHexKey(), pubKey.toHexKey(), createdAt, tags, content, sig.toHexKey())
+        fun addUsers(earlierVersion: PeopleListEvent, listPubKeyHex: List<String>, isPrivate: Boolean, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): PeopleListEvent {
+            return if (isPrivate) {
+                create(
+                    content = encryptTags(
+                        privateTags = earlierVersion.privateTagsOrEmpty(privKey = privateKey).plus(
+                            listPubKeyHex.map {
+                                listOf("p", it)
+                            }
+                        ),
+                        privateKey = privateKey
+                    ),
+                    tags = earlierVersion.tags,
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
+            } else {
+                create(
+                    content = earlierVersion.content,
+                    tags = earlierVersion.tags.plus(
+                        listPubKeyHex.map {
+                            listOf("p", it)
+                        }
+                    ),
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
+            }
+        }
+
+        fun addUser(earlierVersion: PeopleListEvent, pubKeyHex: String, isPrivate: Boolean, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): PeopleListEvent {
+            if (earlierVersion.isTaggedUser(pubKeyHex, isPrivate, privateKey)) return earlierVersion
+
+            return if (isPrivate) {
+                create(
+                    content = encryptTags(
+                        privateTags = earlierVersion.privateTagsOrEmpty(privKey = privateKey).plus(element = listOf("p", pubKeyHex)),
+                        privateKey = privateKey
+                    ),
+                    tags = earlierVersion.tags,
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
+            } else {
+                create(
+                    content = earlierVersion.content,
+                    tags = earlierVersion.tags.plus(element = listOf("p", pubKeyHex)),
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
+            }
+        }
+
+        fun removeUser(earlierVersion: PeopleListEvent, pubKeyHex: String, isPrivate: Boolean, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): PeopleListEvent {
+            if (!earlierVersion.isTaggedUser(pubKeyHex, isPrivate, privateKey)) return earlierVersion
+
+            return if (isPrivate) {
+                create(
+                    content = encryptTags(
+                        privateTags = earlierVersion.privateTagsOrEmpty(privKey = privateKey).filter { it.size > 1 && it[1] != pubKeyHex },
+                        privateKey = privateKey
+                    ),
+                    tags = earlierVersion.tags.filter { it.size > 1 && it[1] != pubKeyHex },
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
+            } else {
+                create(
+                    content = earlierVersion.content,
+                    tags = earlierVersion.tags.filter { it.size > 1 && it[1] != pubKeyHex },
+                    privateKey = privateKey,
+                    createdAt = createdAt
+                )
+            }
+        }
+
+        fun create(content: String, tags: List<List<String>>, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): PeopleListEvent {
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
+            val id = generateId(pubKey, createdAt, kind, tags, content)
+            val sig = CryptoUtils.sign(id, privateKey)
+            return PeopleListEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/model/PinListEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class PinListEvent(
@@ -34,9 +34,9 @@ class PinListEvent(
                 tags.add(listOf("pin", it))
             }
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, "")
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return PinListEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/PollNoteEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 const val POLL_OPTION = "poll_option"
 const val VALUE_MAXIMUM = "value_maximum"
@@ -55,7 +55,7 @@ class PollNoteEvent(
             markAsSensitive: Boolean,
             zapRaiserAmount: Long?
         ): PollNoteEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf<List<String>>()
             replyTos?.forEach {
                 tags.add(listOf("e", it))
@@ -85,7 +85,7 @@ class PollNoteEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, msg)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return PollNoteEvent(id.toHexKey(), pubKey, createdAt, tags, msg, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/PrivateDmEvent.kt

@@ -5,10 +5,9 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import com.vitorpamplona.amethyst.service.HexValidator
 import fr.acinq.secp256k1.Hex
-import nostr.postr.Utils
-import nostr.postr.toHex
 
 @Immutable
 class PrivateDmEvent(
@@ -56,9 +55,9 @@ class PrivateDmEvent(
 
     fun plainContent(privKey: ByteArray, pubKey: ByteArray): String? {
         return try {
-            val sharedSecret = Utils.getSharedSecret(privKey, pubKey)
+            val sharedSecret = CryptoUtils.getSharedSecret(privKey, pubKey)
 
-            val retVal = Utils.decrypt(content, sharedSecret)
+            val retVal = CryptoUtils.decrypt(content, sharedSecret)
 
             if (retVal.startsWith(nip18Advertisement)) {
                 retVal.substring(16)
@@ -89,15 +88,15 @@ class PrivateDmEvent(
             markAsSensitive: Boolean,
             zapRaiserAmount: Long?
         ): PrivateDmEvent {
-            val content = Utils.encrypt(
+            val content = CryptoUtils.encrypt(
                 if (advertiseNip18) { nip18Advertisement } else { "" } + msg,
                 privateKey,
                 recipientPubKey
             )
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf<List<String>>()
             publishedRecipientPubKey?.let {
-                tags.add(listOf("p", publishedRecipientPubKey.toHex()))
+                tags.add(listOf("p", publishedRecipientPubKey.toHexKey()))
             }
             replyTos?.forEach {
                 tags.add(listOf("e", it))
@@ -115,7 +114,7 @@ class PrivateDmEvent(
                 tags.add(listOf("zapraiser", "$it"))
             }
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return PrivateDmEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ReactionEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ReactionEvent(
@@ -31,7 +31,7 @@ class ReactionEvent(
         }
 
         fun create(content: String, originalNote: EventInterface, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ReactionEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
 
             var tags = listOf(listOf("e", originalNote.id()), listOf("p", originalNote.pubKey()))
             if (originalNote is AddressableEvent) {
@@ -39,13 +39,13 @@ class ReactionEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ReactionEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
 
         fun create(emojiUrl: EmojiUrl, originalNote: EventInterface, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ReactionEvent {
             val content = ":${emojiUrl.code}:"
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
 
             var tags = listOf(
                 listOf("e", originalNote.id()),
@@ -58,7 +58,7 @@ class ReactionEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ReactionEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/RecommendRelayEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import java.net.URI
 
 @Immutable
@@ -29,10 +29,10 @@ class RecommendRelayEvent(
 
         fun create(relay: URI, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): RecommendRelayEvent {
             val content = relay.toString()
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = listOf<List<String>>()
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return RecommendRelayEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/RelayAuthEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class RelayAuthEvent(
@@ -23,13 +23,13 @@ class RelayAuthEvent(
 
         fun create(relay: String, challenge: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): RelayAuthEvent {
             val content = ""
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = listOf(
                 listOf("relay", relay),
                 listOf("challenge", challenge)
             )
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return RelayAuthEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/RelaySetEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class RelaySetEvent(
@@ -35,9 +35,9 @@ class RelaySetEvent(
                 tags.add(listOf("r", it))
             }
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val id = generateId(pubKey, createdAt, kind, tags, "")
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return RelaySetEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/ReportEvent.kt

@@ -4,7 +4,7 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Utils
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 data class ReportedKey(val key: String, val reportType: ReportEvent.ReportType)
@@ -63,7 +63,7 @@ class ReportEvent(
             val reportPostTag = listOf("e", reportedPost.id(), type.name.lowercase())
             val reportAuthorTag = listOf("p", reportedPost.pubKey(), type.name.lowercase())
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             var tags: List<List<String>> = listOf(reportPostTag, reportAuthorTag)
 
             if (reportedPost is AddressableEvent) {
@@ -71,7 +71,7 @@ class ReportEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ReportEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
 
@@ -80,10 +80,10 @@ class ReportEvent(
 
             val reportAuthorTag = listOf("p", reportedUser, type.name.lowercase())
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags: List<List<String>> = listOf(reportAuthorTag)
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return ReportEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/RepostEvent.kt

@@ -4,8 +4,8 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import com.vitorpamplona.amethyst.service.relays.Client
-import nostr.postr.Utils
 
 @Immutable
 class RepostEvent(
@@ -35,7 +35,7 @@ class RepostEvent(
             val replyToPost = listOf("e", boostedPost.id())
             val replyToAuthor = listOf("p", boostedPost.pubKey())
 
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             var tags: List<List<String>> = listOf(replyToPost, replyToAuthor)
 
             if (boostedPost is AddressableEvent) {
@@ -43,7 +43,7 @@ class RepostEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, content)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return RepostEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/model/TextNoteEvent.kt

@@ -6,8 +6,8 @@ import com.linkedin.urls.detection.UrlDetectorOptions
 import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.findHashtags
-import nostr.postr.Utils
 
 @Immutable
 class TextNoteEvent(
@@ -42,7 +42,7 @@ class TextNoteEvent(
             privateKey: ByteArray,
             createdAt: Long = TimeUtils.now()
         ): TextNoteEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf<List<String>>()
             replyTos?.forEach {
                 if (it == replyingTo) {
@@ -95,7 +95,7 @@ class TextNoteEvent(
             }
 
             val id = generateId(pubKey, createdAt, kind, tags, msg)
-            val sig = Utils.sign(id, privateKey)
+            val sig = CryptoUtils.sign(id, privateKey)
             return TextNoteEvent(id.toHexKey(), pubKey, createdAt, tags, msg, sig.toHexKey())
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/nip19/Nip19.kt

@@ -4,9 +4,9 @@ import android.util.Log
 import androidx.compose.runtime.Immutable
 import com.vitorpamplona.amethyst.model.hexToByteArray
 import com.vitorpamplona.amethyst.model.toHexKey
-import nostr.postr.Bech32
-import nostr.postr.bechToBytes
-import nostr.postr.toByteArray
+import com.vitorpamplona.amethyst.service.bechToBytes
+import com.vitorpamplona.amethyst.service.toByteArray
+import com.vitorpamplona.amethyst.service.toNEvent
 import java.util.regex.Pattern
 
 object Nip19 {
@@ -167,6 +167,6 @@ object Nip19 {
             fullArray = fullArray + byteArrayOf(Tlv.Type.KIND.id, kind.size.toByte()) + kind
         }
 
-        return Bech32.encodeBytes(hrp = "nevent", fullArray, Bech32.Encoding.Bech32)
+        return fullArray.toNEvent()
     }
 }

app/src/main/java/com/vitorpamplona/amethyst/service/previews/UrlPreviewUtils.kt

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.service.previews
 import com.vitorpamplona.amethyst.service.HttpClient
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
+import okhttp3.Request
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Document
 
@@ -61,10 +62,10 @@ private const val CONTENT = "content"
 
 suspend fun getDocument(url: String, timeOut: Int = 30000): Document =
     withContext(Dispatchers.IO) {
-        return@withContext Jsoup.connect(url)
-            .proxy(HttpClient.getProxy())
-            .timeout(timeOut)
-            .get()
+        val request: Request = Request.Builder().url(url).get().build()
+        val html = HttpClient.getHttpClient().newCall(request).execute().body.string()
+
+        Jsoup.parse(html)
     }
 
 suspend fun parseHtml(url: String, document: Document): UrlInfoItem =

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

@@ -73,10 +73,18 @@ object Client : RelayPool.Listener {
         RelayPool.sendFilterOnlyIfDisconnected()
     }
 
-    fun send(signedEvent: EventInterface, relay: String? = null, feedTypes: Set<FeedType>? = null, onDone: (() -> Unit)? = null) {
+    fun send(
+        signedEvent: EventInterface,
+        relay: String? = null,
+        feedTypes: Set<FeedType>? = null,
+        relayList: List<Relay>? = null,
+        onDone: (() -> Unit)? = null
+    ) {
         checkNotInMainThread()
 
-        if (relay == null) {
+        if (relayList != null) {
+            RelayPool.sendToSelectedRelays(relayList, signedEvent)
+        } else if (relay == null) {
             RelayPool.send(signedEvent)
         } else {
             val useConnectedRelayIfPresent = RelayPool.getRelays(relay)
@@ -170,6 +178,7 @@ object Client : RelayPool.Listener {
         }
     }
 
+    @OptIn(DelicateCoroutinesApi::class)
     override fun onAuth(relay: Relay, challenge: String) {
         // Releases the Web thread for the new payload.
         // May need to add a processing queue if processing new events become too costly.

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

@@ -24,7 +24,7 @@ object RelayPool : Relay.Listener {
     }
 
     fun connectedRelays(): Int {
-        return relays.filter { it.isConnected() }.size
+        return relays.count { it.isConnected() }
     }
 
     fun getRelay(url: String): Relay? {
@@ -62,6 +62,12 @@ object RelayPool : Relay.Listener {
         relays.forEach { it.sendFilterOnlyIfDisconnected() }
     }
 
+    fun sendToSelectedRelays(list: List<Relay>, signedEvent: EventInterface) {
+        list.forEach { relay ->
+            relays.filter { it.url == relay.url }.forEach { it.send(signedEvent) }
+        }
+    }
+
     fun send(signedEvent: EventInterface) {
         relays.forEach { it.send(signedEvent) }
     }

app/src/main/java/com/vitorpamplona/amethyst/ui/MainActivity.kt

@@ -6,18 +6,24 @@ import android.net.ConnectivityManager
 import android.net.Network
 import android.net.NetworkCapabilities
 import android.net.NetworkRequest
+import android.os.Build
 import android.os.Bundle
 import android.util.Log
 import androidx.activity.compose.setContent
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.annotation.RequiresApi
 import androidx.appcompat.app.AppCompatActivity
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.core.os.LocaleListCompat
 import androidx.lifecycle.viewmodel.compose.viewModel
+import androidx.navigation.NavHostController
+import androidx.navigation.compose.rememberNavController
 import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.ServiceManager
@@ -25,13 +31,17 @@ import com.vitorpamplona.amethyst.service.connectivitystatus.ConnectivityStatus
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMetadataEvent
+import com.vitorpamplona.amethyst.service.model.CommunityDefinitionEvent
+import com.vitorpamplona.amethyst.service.model.LiveActivitiesEvent
 import com.vitorpamplona.amethyst.service.model.PrivateDmEvent
 import com.vitorpamplona.amethyst.service.nip19.Nip19
 import com.vitorpamplona.amethyst.service.notifications.PushNotificationUtils
 import com.vitorpamplona.amethyst.service.relays.Client
 import com.vitorpamplona.amethyst.ui.components.DefaultMutedSetting
+import com.vitorpamplona.amethyst.ui.components.keepPlayingMutex
 import com.vitorpamplona.amethyst.ui.navigation.Route
 import com.vitorpamplona.amethyst.ui.navigation.debugState
+import com.vitorpamplona.amethyst.ui.navigation.getRouteWithArguments
 import com.vitorpamplona.amethyst.ui.note.Nip47
 import com.vitorpamplona.amethyst.ui.screen.AccountScreen
 import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
@@ -45,21 +55,23 @@ import java.net.URLEncoder
 import java.nio.charset.StandardCharsets
 
 class MainActivity : AppCompatActivity() {
+    lateinit var navController: NavHostController
+
+    @RequiresApi(Build.VERSION_CODES.R)
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
-        val uri = intent?.data?.toString()
-
-        val startingPage = uriToRoute(uri)
-
         LocalPreferences.migrateSingleUserPrefs()
         val language = LocalPreferences.getPreferredLanguage()
         if (language.isNotBlank()) {
             val appLocale: LocaleListCompat = LocaleListCompat.forLanguageTags(language)
             AppCompatDelegate.setApplicationLocales(appLocale)
         }
+
         setContent {
+            navController = rememberNavController()
             val themeViewModel: ThemeViewModel = viewModel()
+
             themeViewModel.onChange(LocalPreferences.getTheme())
             AmethystTheme(themeViewModel) {
                 // A surface container using the 'background' color from the theme
@@ -68,7 +80,7 @@ class MainActivity : AppCompatActivity() {
                         AccountStateViewModel(this@MainActivity)
                     }
 
-                    AccountScreen(accountStateViewModel, themeViewModel, startingPage)
+                    AccountScreen(accountStateViewModel, themeViewModel, navController)
                 }
             }
         }
@@ -83,11 +95,21 @@ class MainActivity : AppCompatActivity() {
         connectivityManager.requestNetwork(networkRequest, networkCallback)
 
         Client.lenient = true
+
+        val uri = intent?.data?.toString()
+        val startingPage = uriToRoute(uri)
+        if (startingPage != null) {
+            navController.navigate(startingPage) {
+                popUpTo(Route.Home.route)
+                launchSingleTop = true
+            }
+        }
     }
 
     @OptIn(DelicateCoroutinesApi::class)
     override fun onResume() {
         super.onResume()
+
         // starts muted every time
         DefaultMutedSetting.value = true
 
@@ -100,19 +122,26 @@ class MainActivity : AppCompatActivity() {
     }
 
     override fun onPause() {
-        ServiceManager.pause()
-
         if (BuildConfig.DEBUG) {
             debugState(this)
         }
 
+        ServiceManager.pause()
         super.onPause()
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        keepPlayingMutex?.stop()
+        keepPlayingMutex?.release()
+        keepPlayingMutex = null
+    }
+
     /**
      * Release memory when the UI becomes hidden or when system resources become low.
      * @param level the memory-related event that was raised.
      */
+    @OptIn(DelicateCoroutinesApi::class)
     override fun onTrimMemory(level: Int) {
         super.onTrimMemory(level)
         println("Trim Memory $level")
@@ -121,6 +150,42 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+    override fun onNewIntent(intent: Intent?) {
+        super.onNewIntent(intent)
+
+        if (this::navController.isInitialized) {
+            val uri = intent?.data?.toString()
+            val startingPage = uriToRoute(uri)
+
+            startingPage?.let { route ->
+                val currentRoute = getRouteWithArguments(navController)
+                if (!isSameRoute(currentRoute, route)) {
+                    navController.navigate(route) {
+                        popUpTo(Route.Home.route)
+                        launchSingleTop = true
+                    }
+                }
+            }
+        }
+    }
+
+    private fun isSameRoute(currentRoute: String?, newRoute: String): Boolean {
+        if (currentRoute == null) return false
+
+        if (currentRoute == newRoute) {
+            return true
+        }
+
+        if (newRoute.startsWith("Event/") && currentRoute.contains("/")) {
+            if (newRoute.split("/")[1] == currentRoute.split("/")[1]) {
+                return true
+            }
+        }
+
+        return false
+    }
+
+    @OptIn(DelicateCoroutinesApi::class)
     private val networkCallback = object : ConnectivityManager.NetworkCallback() {
         // network is available for use
         override fun onAvailable(network: Network) {
@@ -139,14 +204,17 @@ class MainActivity : AppCompatActivity() {
             networkCapabilities: NetworkCapabilities
         ) {
             super.onCapabilitiesChanged(network, networkCapabilities)
-            val hasMobileData = networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
-            val hasWifi = networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
-            Log.d("NETWORKCALLBACK", "onCapabilitiesChanged: hasMobileData $hasMobileData")
-            Log.d("NETWORKCALLBACK", "onCapabilitiesChanged: hasWifi $hasWifi")
-            ConnectivityStatus.updateConnectivityStatus(
-                networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR),
-                networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
-            )
+
+            GlobalScope.launch(Dispatchers.IO) {
+                val hasMobileData = networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
+                val hasWifi = networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
+                Log.d("NETWORKCALLBACK", "onCapabilitiesChanged: hasMobileData $hasMobileData")
+                Log.d("NETWORKCALLBACK", "onCapabilitiesChanged: hasWifi $hasWifi")
+                ConnectivityStatus.updateConnectivityStatus(
+                    hasMobileData,
+                    hasWifi
+                )
+            }
         }
 
         // lost network connection
@@ -192,7 +260,14 @@ fun uriToRoute(uri: String?): String? {
                     }
                 }
 
-                Nip19.Type.ADDRESS -> "Note/${nip19.hex}"
+                Nip19.Type.ADDRESS ->
+                    if (nip19.kind == CommunityDefinitionEvent.kind) {
+                        "Community/${nip19.hex}"
+                    } else if (nip19.kind == LiveActivitiesEvent.kind) {
+                        "Channel/${nip19.hex}"
+                    } else {
+                        "Event/${nip19.hex}"
+                    }
                 else -> null
             }
         } ?: try {

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

@@ -224,7 +224,7 @@ class NostrCheckMeServer : FileServer() {
         var id = tree?.get("id")?.asText()
         var isCompleted = false
 
-        val client = OkHttpClient()
+        val client = HttpClient.getHttpClient()
         var requrl = "https://nostrcheck.me/api/v1/media?id=" + id // + "&apikey=26d075787d261660682fb9d20dbffa538c708b1eda921d0efa2be95fbef4910a"
 
         val request = Request.Builder()

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

@@ -12,7 +12,6 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.itemsIndexed
@@ -45,7 +44,6 @@ import androidx.compose.ui.focus.onFocusChanged
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalLifecycleOwner
 import androidx.compose.ui.platform.LocalSoftwareKeyboardController
-import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
@@ -62,9 +60,11 @@ import com.vitorpamplona.amethyst.service.NostrSearchEventOrUserDataSource
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.ui.note.ChannelName
 import com.vitorpamplona.amethyst.ui.note.ClickableUserPicture
+import com.vitorpamplona.amethyst.ui.note.SearchIcon
 import com.vitorpamplona.amethyst.ui.note.UsernameDisplay
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.SearchBarViewModel
+import com.vitorpamplona.amethyst.ui.theme.Size20Modifier
 import com.vitorpamplona.amethyst.ui.theme.Size55dp
 import com.vitorpamplona.amethyst.ui.theme.placeholderText
 import kotlinx.coroutines.Dispatchers
@@ -254,12 +254,7 @@ private fun SearchEditTextForJoin(
                 }
             },
             leadingIcon = {
-                Icon(
-                    painter = painterResource(R.drawable.ic_search),
-                    contentDescription = null,
-                    modifier = Modifier.size(20.dp),
-                    tint = Color.Unspecified
-                )
+                SearchIcon(modifier = Size20Modifier, Color.Unspecified)
             },
             modifier = Modifier
                 .weight(1f, true)

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

@@ -11,6 +11,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.vitorpamplona.amethyst.model.*
 import com.vitorpamplona.amethyst.service.FileHeader
+import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.ui.components.MediaCompressor
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableSharedFlow
@@ -56,7 +57,7 @@ open class NewMediaModel : ViewModel() {
         }
     }
 
-    fun upload(context: Context) {
+    fun upload(context: Context, relayList: List<Relay>? = null) {
         isUploadingImage = true
 
         val contentResolver = context.contentResolver
@@ -78,7 +79,7 @@ open class NewMediaModel : ViewModel() {
                         uploadingPercentage.value = 0.2f
                         uploadingDescription.value = "Loading"
                         contentResolver.openInputStream(fileUri)?.use {
-                            createNIP95Record(it.readBytes(), contentType, description, sensitiveContent)
+                            createNIP95Record(it.readBytes(), contentType, description, sensitiveContent, relayList = relayList)
                         }
                             ?: run {
                                 viewModelScope.launch {
@@ -98,7 +99,7 @@ open class NewMediaModel : ViewModel() {
                             server = serverToUse,
                             contentResolver = contentResolver,
                             onSuccess = { imageUrl, mimeType ->
-                                createNIP94Record(imageUrl, mimeType, description, sensitiveContent)
+                                createNIP94Record(imageUrl, mimeType, description, sensitiveContent, relayList = relayList)
                             },
                             onError = {
                                 isUploadingImage = false
@@ -138,7 +139,7 @@ open class NewMediaModel : ViewModel() {
         return !isUploadingImage && galleryUri != null && selectedServer != null
     }
 
-    fun createNIP94Record(imageUrl: String, mimeType: String?, description: String, sensitiveContent: Boolean) {
+    fun createNIP94Record(imageUrl: String, mimeType: String?, description: String, sensitiveContent: Boolean, relayList: List<Relay>? = null) {
         uploadingPercentage.value = 0.40f
         viewModelScope.launch(Dispatchers.IO) {
             uploadingDescription.value = "Server Processing"
@@ -162,7 +163,7 @@ open class NewMediaModel : ViewModel() {
                     onReady = {
                         uploadingPercentage.value = 0.90f
                         uploadingDescription.value = "Sending"
-                        account?.sendHeader(it)
+                        account?.sendHeader(it, relayList)
                         uploadingPercentage.value = 1.00f
                         isUploadingImage = false
                         onceUploaded()
@@ -191,7 +192,7 @@ open class NewMediaModel : ViewModel() {
         }
     }
 
-    fun createNIP95Record(bytes: ByteArray, mimeType: String?, description: String, sensitiveContent: Boolean) {
+    fun createNIP95Record(bytes: ByteArray, mimeType: String?, description: String, sensitiveContent: Boolean, relayList: List<Relay>? = null) {
         uploadingPercentage.value = 0.30f
         uploadingDescription.value = "Hashing"
 
@@ -210,7 +211,7 @@ open class NewMediaModel : ViewModel() {
                     if (nip95 != null) {
                         uploadingDescription.value = "Sending"
                         uploadingPercentage.value = 0.60f
-                        account?.sendNip95(nip95.first, nip95.second)
+                        account?.sendNip95(nip95.first, nip95.second, relayList)
                     }
 
                     uploadingPercentage.value = 1.00f

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

@@ -7,17 +7,21 @@ import android.util.Size
 import android.widget.Toast
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.imePadding
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.Icon
+import androidx.compose.material.IconButton
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.OutlinedTextField
 import androidx.compose.material.Surface
@@ -33,6 +37,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.asImageBitmap
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.unit.dp
@@ -70,6 +75,17 @@ fun NewMediaView(uri: Uri, onClose: () -> Unit, postViewModel: NewMediaModel, ac
         }
     }
 
+    var showRelaysDialog by remember {
+        mutableStateOf(false)
+    }
+    var relayList = account.activeRelays()?.filter {
+        it.write
+    }?.map {
+        it
+    } ?: account.convertLocalRelays().filter {
+        it.write
+    }
+
     Dialog(
         onDismissRequest = { onClose() },
         properties = DialogProperties(
@@ -82,6 +98,20 @@ fun NewMediaView(uri: Uri, onClose: () -> Unit, postViewModel: NewMediaModel, ac
             modifier = Modifier
                 .fillMaxWidth()
         ) {
+            if (showRelaysDialog) {
+                RelaySelectionDialog(
+                    list = relayList,
+                    onClose = {
+                        showRelaysDialog = false
+                    },
+                    onPost = {
+                        relayList = it
+                    },
+                    accountViewModel = accountViewModel,
+                    nav = nav
+                )
+            }
+
             Column(
                 modifier = Modifier.padding(start = 10.dp, end = 10.dp, top = 10.dp)
                     .fillMaxWidth()
@@ -97,10 +127,26 @@ fun NewMediaView(uri: Uri, onClose: () -> Unit, postViewModel: NewMediaModel, ac
                         onClose()
                     })
 
+                    Box {
+                        IconButton(
+                            modifier = Modifier.align(Alignment.Center),
+                            onClick = {
+                                showRelaysDialog = true
+                            }
+                        ) {
+                            Icon(
+                                painter = painterResource(R.drawable.relays),
+                                contentDescription = null,
+                                modifier = Modifier.height(25.dp),
+                                tint = MaterialTheme.colors.onBackground
+                            )
+                        }
+                    }
+
                     PostButton(
                         onPost = {
                             onClose()
-                            postViewModel.upload(context)
+                            postViewModel.upload(context, relayList)
                             postViewModel.selectedServer?.let { account.changeDefaultFileServer(it) }
                         },
                         isActive = postViewModel.canPost()
@@ -192,7 +238,10 @@ fun ImageVideoPost(postViewModel: NewMediaModel, accountViewModel: AccountViewMo
             }
         } else {
             postViewModel.galleryUri?.let {
-                VideoView(it.toString(), accountViewModel = accountViewModel)
+                VideoView(
+                    videoUri = it.toString(),
+                    accountViewModel = accountViewModel
+                )
             }
         }
     }

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

@@ -4,10 +4,17 @@ import com.vitorpamplona.amethyst.model.HexKey
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
-import com.vitorpamplona.amethyst.model.parseDirtyWordForKey
+import com.vitorpamplona.amethyst.service.KeyPair
+import com.vitorpamplona.amethyst.service.bechToBytes
 import com.vitorpamplona.amethyst.service.nip19.Nip19
+import com.vitorpamplona.amethyst.service.toNpub
 
-class NewMessageTagger(var channelHex: String?, var mentions: List<User>?, var replyTos: List<Note>?, var message: String) {
+class NewMessageTagger(
+    var message: String,
+    var mentions: List<User>? = null,
+    var replyTos: List<Note>? = null,
+    var channelHex: String? = null
+) {
 
     val directMentions = mutableSetOf<HexKey>()
 
@@ -83,4 +90,55 @@ class NewMessageTagger(var channelHex: String?, var mentions: List<User>?, var r
             }.joinToString(" ")
         }.joinToString("\n")
     }
+
+    data class DirtyKeyInfo(val key: Nip19.Return, val restOfWord: String)
+
+    fun parseDirtyWordForKey(mightBeAKey: String): DirtyKeyInfo? {
+        var key = mightBeAKey
+        if (key.startsWith("nostr:", true)) {
+            key = key.substring("nostr:".length)
+        }
+
+        key = key.removePrefix("@")
+
+        if (key.length < 63) {
+            return null
+        }
+
+        try {
+            val keyB32 = key.substring(0, 63)
+            val restOfWord = key.substring(63)
+
+            if (key.startsWith("nsec1", true)) {
+                // Converts to npub
+                val pubkey = Nip19.uriToRoute(KeyPair(privKey = keyB32.bechToBytes()).pubKey.toNpub()) ?: return null
+
+                return DirtyKeyInfo(pubkey, restOfWord)
+            } else if (key.startsWith("npub1", true)) {
+                val pubkey = Nip19.uriToRoute(keyB32) ?: return null
+
+                return DirtyKeyInfo(pubkey, restOfWord)
+            } else if (key.startsWith("note1", true)) {
+                val noteId = Nip19.uriToRoute(keyB32) ?: return null
+
+                return DirtyKeyInfo(noteId, restOfWord)
+            } else if (key.startsWith("nprofile", true)) {
+                val pubkeyRelay = Nip19.uriToRoute(keyB32 + restOfWord) ?: return null
+
+                return DirtyKeyInfo(pubkeyRelay, pubkeyRelay.additionalChars)
+            } else if (key.startsWith("nevent1", true)) {
+                val noteRelayId = Nip19.uriToRoute(keyB32 + restOfWord) ?: return null
+
+                return DirtyKeyInfo(noteRelayId, noteRelayId.additionalChars)
+            } else if (key.startsWith("naddr1", true)) {
+                val address = Nip19.uriToRoute(keyB32 + restOfWord) ?: return null
+
+                return DirtyKeyInfo(address, address.additionalChars) // no way to know when they address ends and dirt begins
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+
+        return null
+    }
 }

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

@@ -21,7 +21,6 @@ import androidx.compose.material.*
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowForwardIos
 import androidx.compose.material.icons.filled.Bolt
-import androidx.compose.material.icons.filled.Cancel
 import androidx.compose.material.icons.filled.CurrencyBitcoin
 import androidx.compose.material.icons.filled.ShowChart
 import androidx.compose.material.icons.filled.Visibility
@@ -73,7 +72,11 @@ import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.NostrSearchEventOrUserDataSource
 import com.vitorpamplona.amethyst.service.noProtocolUrlValidator
 import com.vitorpamplona.amethyst.ui.components.*
+import com.vitorpamplona.amethyst.ui.note.CancelIcon
+import com.vitorpamplona.amethyst.ui.note.CloseIcon
 import com.vitorpamplona.amethyst.ui.note.NoteCompose
+import com.vitorpamplona.amethyst.ui.note.PollIcon
+import com.vitorpamplona.amethyst.ui.note.RegularPostIcon
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.TextSpinner
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.UserLine
@@ -107,6 +110,16 @@ fun NewPostView(onClose: () -> Unit, baseReplyTo: Note? = null, quote: Note? = n
 
     val scrollState = rememberScrollState()
     val scope = rememberCoroutineScope()
+    var showRelaysDialog by remember {
+        mutableStateOf(false)
+    }
+    var relayList = account.activeRelays()?.filter {
+        it.write
+    }?.map {
+        it
+    } ?: account.convertLocalRelays().filter {
+        it.write
+    }
 
     LaunchedEffect(Unit) {
         postViewModel.load(account, baseReplyTo, quote)
@@ -141,6 +154,20 @@ fun NewPostView(onClose: () -> Unit, baseReplyTo: Note? = null, quote: Note? = n
                 .fillMaxWidth()
                 .fillMaxHeight()
         ) {
+            if (showRelaysDialog) {
+                RelaySelectionDialog(
+                    list = relayList,
+                    onClose = {
+                        showRelaysDialog = false
+                    },
+                    onPost = {
+                        relayList = it
+                    },
+                    accountViewModel = accountViewModel,
+                    nav = nav
+                )
+            }
+
             Column(
                 modifier = Modifier
                     .fillMaxWidth()
@@ -162,10 +189,25 @@ fun NewPostView(onClose: () -> Unit, baseReplyTo: Note? = null, quote: Note? = n
                             onClose()
                         })
 
+                        Box {
+                            IconButton(
+                                modifier = Modifier.align(Alignment.Center),
+                                onClick = {
+                                    showRelaysDialog = true
+                                }
+                            ) {
+                                Icon(
+                                    painter = painterResource(R.drawable.relays),
+                                    contentDescription = null,
+                                    modifier = Modifier.height(25.dp),
+                                    tint = MaterialTheme.colors.onBackground
+                                )
+                            }
+                        }
                         PostButton(
                             onPost = {
                                 scope.launch(Dispatchers.IO) {
-                                    postViewModel.sendPost()
+                                    postViewModel.sendPost(relayList = relayList)
                                     onClose()
                                 }
                             },
@@ -262,7 +304,7 @@ fun NewPostView(onClose: () -> Unit, baseReplyTo: Note? = null, quote: Note? = n
                                         url,
                                         account.defaultFileServer,
                                         onAdd = { description, server, sensitiveContent ->
-                                            postViewModel.upload(url, description, sensitiveContent, server, context)
+                                            postViewModel.upload(url, description, sensitiveContent, server, context, relayList)
                                             account.changeDefaultFileServer(server)
                                         },
                                         onCancel = {
@@ -479,19 +521,9 @@ private fun AddPollButton(
         }
     ) {
         if (!isPollActive) {
-            Icon(
-                painter = painterResource(R.drawable.ic_poll),
-                null,
-                modifier = Modifier.size(20.dp),
-                tint = MaterialTheme.colors.onBackground
-            )
+            PollIcon()
         } else {
-            Icon(
-                painter = painterResource(R.drawable.ic_lists),
-                null,
-                modifier = Modifier.size(20.dp),
-                tint = MaterialTheme.colors.onBackground
-            )
+            RegularPostIcon()
         }
     }
 }
@@ -725,12 +757,7 @@ fun CloseButton(onCancel: () -> Unit) {
                 backgroundColor = Color.Gray
             )
     ) {
-        Icon(
-            painter = painterResource(id = R.drawable.ic_close),
-            contentDescription = stringResource(id = R.string.cancel),
-            modifier = Modifier.size(20.dp),
-            tint = Color.White
-        )
+        CloseIcon()
     }
 }
 
@@ -792,30 +819,6 @@ fun CreateButton(onPost: () -> Unit = {}, isActive: Boolean, modifier: Modifier
     }
 }
 
-@Composable
-fun SearchButton(onPost: () -> Unit = {}, isActive: Boolean, modifier: Modifier = Modifier) {
-    Button(
-        modifier = modifier,
-        onClick = {
-            if (isActive) {
-                onPost()
-            }
-        },
-        shape = ButtonBorder,
-        colors = ButtonDefaults
-            .buttonColors(
-                backgroundColor = if (isActive) MaterialTheme.colors.primary else Color.Gray
-            )
-    ) {
-        Icon(
-            painter = painterResource(R.drawable.ic_search),
-            null,
-            modifier = Modifier.size(26.dp),
-            tint = Color.White
-        )
-    }
-}
-
 enum class ServersAvailable {
     // IMGUR,
     NOSTR_BUILD,
@@ -910,17 +913,10 @@ fun ImageVideoDescription(
                 )
 
                 IconButton(
-                    modifier = Modifier.size(30.dp),
+                    modifier = Modifier.size(30.dp).padding(end = 5.dp),
                     onClick = onCancel
                 ) {
-                    Icon(
-                        imageVector = Icons.Default.Cancel,
-                        null,
-                        modifier = Modifier
-                            .padding(end = 5.dp)
-                            .size(30.dp),
-                        tint = MaterialTheme.colors.placeholderText
-                    )
+                    CancelIcon()
                 }
             }
 

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

@@ -22,6 +22,7 @@ import com.vitorpamplona.amethyst.service.model.CommunityDefinitionEvent
 import com.vitorpamplona.amethyst.service.model.PrivateDmEvent
 import com.vitorpamplona.amethyst.service.model.TextNoteEvent
 import com.vitorpamplona.amethyst.service.noProtocolUrlValidator
+import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.ui.components.MediaCompressor
 import com.vitorpamplona.amethyst.ui.components.isValidURL
 import kotlinx.coroutines.Dispatchers
@@ -128,8 +129,8 @@ open class NewPostViewModel() : ViewModel() {
         this.account = account
     }
 
-    fun sendPost() {
-        val tagger = NewMessageTagger(originalNote?.channelHex(), mentions, replyTos, message.text)
+    fun sendPost(relayList: List<Relay>? = null) {
+        val tagger = NewMessageTagger(message.text, mentions, replyTos, originalNote?.channelHex())
         tagger.run()
 
         val zapReceiver = if (wantsForwardZapTo) {
@@ -145,7 +146,20 @@ open class NewPostViewModel() : ViewModel() {
         val localZapRaiserAmount = if (wantsZapraiser) zapRaiserAmount else null
 
         if (wantsPoll) {
-            account?.sendPoll(tagger.message, tagger.replyTos, tagger.mentions, pollOptions, valueMaximum, valueMinimum, consensusThreshold, closedAt, zapReceiver, wantsToMarkAsSensitive, localZapRaiserAmount)
+            account?.sendPoll(
+                tagger.message,
+                tagger.replyTos,
+                tagger.mentions,
+                pollOptions,
+                valueMaximum,
+                valueMinimum,
+                consensusThreshold,
+                closedAt,
+                zapReceiver,
+                wantsToMarkAsSensitive,
+                localZapRaiserAmount,
+                relayList
+            )
         } else if (originalNote?.channelHex() != null) {
             if (originalNote is AddressableEvent && originalNote?.address() != null) {
                 account?.sendLiveMessage(tagger.message, originalNote?.address()!!, tagger.replyTos, tagger.mentions, zapReceiver, wantsToMarkAsSensitive, localZapRaiserAmount)
@@ -172,14 +186,15 @@ open class NewPostViewModel() : ViewModel() {
                 zapRaiserAmount = localZapRaiserAmount,
                 replyingTo = replyId,
                 root = rootId,
-                directMentions = tagger.directMentions
+                directMentions = tagger.directMentions,
+                relayList = relayList
             )
         }
 
         cancel()
     }
 
-    fun upload(galleryUri: Uri, description: String, sensitiveContent: Boolean, server: ServersAvailable, context: Context) {
+    fun upload(galleryUri: Uri, description: String, sensitiveContent: Boolean, server: ServersAvailable, context: Context, relayList: List<Relay>? = null) {
         isUploadingImage = true
         contentToAddUrl = null
 
@@ -194,7 +209,7 @@ open class NewPostViewModel() : ViewModel() {
                 onReady = { fileUri, contentType, size ->
                     if (server == ServersAvailable.NIP95) {
                         contentResolver.openInputStream(fileUri)?.use {
-                            createNIP95Record(it.readBytes(), contentType, description, sensitiveContent)
+                            createNIP95Record(it.readBytes(), contentType, description, sensitiveContent, relayList = relayList)
                         }
                     } else {
                         ImageUploader.uploadImage(
@@ -370,7 +385,7 @@ open class NewPostViewModel() : ViewModel() {
         }
     }
 
-    fun createNIP94Record(imageUrl: String, mimeType: String?, description: String, sensitiveContent: Boolean) {
+    fun createNIP94Record(imageUrl: String, mimeType: String?, description: String, sensitiveContent: Boolean, relayList: List<Relay>? = null) {
         viewModelScope.launch(Dispatchers.IO) {
             // Images don't seem to be ready immediately after upload
             FileHeader.prepare(
@@ -379,7 +394,7 @@ open class NewPostViewModel() : ViewModel() {
                 description,
                 sensitiveContent,
                 onReady = {
-                    val note = account?.sendHeader(it)
+                    val note = account?.sendHeader(it, relayList = relayList)
 
                     isUploadingImage = false
 
@@ -401,7 +416,7 @@ open class NewPostViewModel() : ViewModel() {
         }
     }
 
-    fun createNIP95Record(bytes: ByteArray, mimeType: String?, description: String, sensitiveContent: Boolean) {
+    fun createNIP95Record(bytes: ByteArray, mimeType: String?, description: String, sensitiveContent: Boolean, relayList: List<Relay>? = null) {
         viewModelScope.launch(Dispatchers.IO) {
             FileHeader.prepare(
                 bytes,
@@ -411,7 +426,7 @@ open class NewPostViewModel() : ViewModel() {
                 sensitiveContent,
                 onReady = {
                     val nip95 = account?.createNip95(bytes, headerInfo = it)
-                    val note = nip95?.let { it1 -> account?.sendNip95(it1.first, it1.second) }
+                    val note = nip95?.let { it1 -> account?.sendNip95(it1.first, it1.second, relayList = relayList) }
 
                     isUploadingImage = false
 

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

@@ -58,6 +58,7 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.RelayInformation
 import com.vitorpamplona.amethyst.model.RelaySetupInfo
+import com.vitorpamplona.amethyst.service.relays.Constants.defaultRelays
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.ButtonBorder
@@ -105,6 +106,22 @@ fun NewRelayListView(onClose: () -> Unit, accountViewModel: AccountViewModel, re
                         onClose()
                     })
 
+                    Button(
+                        onClick = {
+                            postViewModel.deleteAll()
+                            defaultRelays.forEach {
+                                postViewModel.addRelay(it)
+                            }
+                            postViewModel.relays.value.forEach { item ->
+                                loadRelayInfo(item.url, context, scope) {
+                                    postViewModel.togglePaidRelay(item, it.limitation?.payment_required ?: false)
+                                }
+                            }
+                        }
+                    ) {
+                        Text(stringResource(R.string.default_relays))
+                    }
+
                     PostButton(
                         onPost = {
                             postViewModel.create()

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

@@ -90,6 +90,12 @@ class NewRelayListViewModel : ViewModel() {
         }
     }
 
+    fun deleteAll() {
+        _relays.update { relays ->
+            relays.dropWhile { relays.isNotEmpty() }
+        }
+    }
+
     fun toggleDownload(relay: RelaySetupInfo) {
         _relays.update {
             it.updated(relay, relay.copy(read = !relay.read))

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

@@ -0,0 +1,206 @@
+package com.vitorpamplona.amethyst.ui.actions
+
+import android.widget.Toast
+import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.combinedClickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material.Surface
+import androidx.compose.material.Switch
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Dialog
+import androidx.compose.ui.window.DialogProperties
+import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.RelayInformation
+import com.vitorpamplona.amethyst.service.relays.Relay
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import kotlinx.coroutines.launch
+
+data class RelayList(
+    val relay: Relay,
+    val isSelected: Boolean
+)
+
+@Composable
+fun RelaySelectionDialog(
+    list: List<Relay>,
+    onClose: () -> Unit,
+    onPost: (list: List<Relay>) -> Unit,
+    accountViewModel: AccountViewModel,
+    nav: (String) -> Unit
+) {
+    val scope = rememberCoroutineScope()
+    val context = LocalContext.current
+    val relayList = accountViewModel.account.activeRelays()?.filter {
+        it.write
+    }?.map {
+        it
+    } ?: accountViewModel.account.convertLocalRelays().filter {
+        it.write
+    }
+
+    var relays by remember {
+        mutableStateOf(
+            relayList.map {
+                RelayList(
+                    it,
+                    list.any { relay -> it.url == relay.url }
+                )
+            }
+        )
+    }
+    var relayInfo: RelayInformation? by remember { mutableStateOf(null) }
+
+    if (relayInfo != null) {
+        RelayInformationDialog(
+            onClose = {
+                relayInfo = null
+            },
+            relayInfo = relayInfo!!,
+            accountViewModel,
+            nav
+        )
+    }
+
+    var selected by remember {
+        mutableStateOf(true)
+    }
+
+    Dialog(
+        onDismissRequest = { onClose() },
+        properties = DialogProperties(
+            usePlatformDefaultWidth = false,
+            dismissOnClickOutside = false,
+            decorFitsSystemWindows = false
+        )
+    ) {
+        Surface(
+            modifier = Modifier
+                .fillMaxWidth()
+                .fillMaxHeight()
+        ) {
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .fillMaxHeight()
+                    .padding(start = 10.dp, end = 10.dp, top = 10.dp)
+
+            ) {
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.SpaceBetween,
+                    verticalAlignment = Alignment.CenterVertically
+                ) {
+                    CloseButton(
+                        onCancel = {
+                            onClose()
+                        }
+                    )
+
+                    PostButton(
+                        onPost = {
+                            val selectedRelays = relays.filter { it.isSelected }
+                            if (selectedRelays.isEmpty()) {
+                                scope.launch {
+                                    Toast.makeText(context, "Select a relay to continue", Toast.LENGTH_SHORT).show()
+                                }
+                                return@PostButton
+                            }
+                            onPost(selectedRelays.map { it.relay })
+                            onClose()
+                        },
+                        isActive = true
+                    )
+                }
+
+                RelaySwitch(
+                    text = stringResource(R.string.select_deselect_all),
+                    checked = selected,
+                    onClick = {
+                        selected = !selected
+                        relays = relays.mapIndexed { _, item ->
+                            item.copy(isSelected = selected)
+                        }
+                    }
+                )
+
+                LazyColumn(
+                    contentPadding = PaddingValues(
+                        top = 10.dp,
+                        bottom = 10.dp
+                    )
+                ) {
+                    itemsIndexed(
+                        relays,
+                        key = { _, item -> item.relay.url }
+                    ) { index, item ->
+                        RelaySwitch(
+                            text = item.relay.url
+                                .removePrefix("ws://")
+                                .removePrefix("wss://")
+                                .removeSuffix("/"),
+                            checked = item.isSelected,
+                            onClick = {
+                                relays = relays.mapIndexed { j, item ->
+                                    if (index == j) {
+                                        item.copy(isSelected = !item.isSelected)
+                                    } else {
+                                        item
+                                    }
+                                }
+                            },
+                            onLongPress = {
+                                loadRelayInfo(item.relay.url, context, scope) {
+                                    relayInfo = it
+                                }
+                            }
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalFoundationApi::class)
+@Composable
+fun RelaySwitch(text: String, checked: Boolean, onClick: () -> Unit, onLongPress: () -> Unit = { }) {
+    Row(
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier
+            .combinedClickable(
+                onClick = onClick,
+                onLongClick = onLongPress
+            )
+    ) {
+        Text(
+            modifier = Modifier.weight(1f),
+            text = text
+        )
+        Switch(
+            checked = checked,
+            onCheckedChange = {
+                onClick()
+            }
+        )
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/components/MediaCompressor.kt

@@ -38,11 +38,10 @@ class MediaCompressor {
                 //    videoName = "compressed_video" // => required name
                 // ),
                 // OR AND NOT BOTH
-                appSpecificStorageConfiguration = AppSpecificStorageConfiguration(
-                    videoName = UUID.randomUUID().toString() // => required name
-                ),
+                appSpecificStorageConfiguration = AppSpecificStorageConfiguration(),
                 configureWith = Configuration(
-                    quality = VideoQuality.LOW
+                    quality = VideoQuality.LOW,
+                    videoNames = listOf(UUID.randomUUID().toString()) // => required name
                 ),
                 listener = object : CompressionListener {
                     override fun onProgress(index: Int, percent: Float) {

app/src/main/java/com/vitorpamplona/amethyst/ui/components/RichTextViewer.kt

@@ -64,6 +64,7 @@ import com.vitorpamplona.amethyst.ui.note.NoteCompose
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.theme.Font17SP
+import com.vitorpamplona.amethyst.ui.theme.HalfVertPadding
 import com.vitorpamplona.amethyst.ui.theme.MarkdownTextStyle
 import com.vitorpamplona.amethyst.ui.theme.innerPostModifier
 import com.vitorpamplona.amethyst.ui.theme.markdownStyle
@@ -285,7 +286,9 @@ private fun ZoomableContentView(
     accountViewModel: AccountViewModel
 ) {
     state.imagesForPager[word]?.let {
-        ZoomableContentView(it, state.imageList, accountViewModel)
+        Box(modifier = HalfVertPadding) {
+            ZoomableContentView(it, state.imageList, accountViewModel)
+        }
     }
 }
 

app/src/main/java/com/vitorpamplona/amethyst/ui/components/Robohash.kt

@@ -13,9 +13,9 @@ import coil.fetch.Fetcher
 import coil.fetch.SourceResult
 import coil.request.ImageRequest
 import coil.request.Options
+import com.vitorpamplona.amethyst.service.CryptoUtils
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import okio.Buffer
-import java.security.MessageDigest
 
 private fun toHex(color: Color): String {
     val argb = color.toArgb()
@@ -35,7 +35,7 @@ private fun bytesToRGB(b1: Byte, b2: Byte, b3: Byte): Color {
 private fun svgString(msg: String): String {
     checkNotInMainThread()
 
-    val hash = MessageDigest.getInstance("SHA-256").digest(msg.toByteArray())
+    val hash = CryptoUtils.sha256(msg.toByteArray())
     val hashHex = hash.joinToString(separator = "") { b -> "%02x".format(b) }
     val bgColor = bytesToRGB(hash[0], hash[1], hash[2])
     val fgColor = bytesToRGB(hash[3], hash[4], hash[5])

app/src/main/java/com/vitorpamplona/amethyst/ui/components/SelectTextDialog.kt

@@ -11,12 +11,8 @@ import androidx.compose.foundation.text.selection.SelectionContainer
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.Card
 import androidx.compose.material.Divider
-import androidx.compose.material.Icon
 import androidx.compose.material.IconButton
-import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ArrowBack
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -25,6 +21,8 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
 import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.note.ArrowBackIcon
+import com.vitorpamplona.amethyst.ui.theme.Size24dp
 
 @Composable
 fun SelectTextDialog(text: String, onDismiss: () -> Unit) {
@@ -41,7 +39,7 @@ fun SelectTextDialog(text: String, onDismiss: () -> Unit) {
     ) {
         Card {
             Column(
-                modifier = Modifier.heightIn(24.dp, maxHeight)
+                modifier = Modifier.heightIn(Size24dp, maxHeight)
             ) {
                 Row(
                     verticalAlignment = Alignment.CenterVertically,
@@ -50,11 +48,7 @@ fun SelectTextDialog(text: String, onDismiss: () -> Unit) {
                     IconButton(
                         onClick = onDismiss
                     ) {
-                        Icon(
-                            imageVector = Icons.Default.ArrowBack,
-                            contentDescription = null,
-                            tint = MaterialTheme.colors.primary
-                        )
+                        ArrowBackIcon(Size24dp)
                     }
                     Text(text = stringResource(R.string.select_text_dialog_top))
                 }

app/src/main/java/com/vitorpamplona/amethyst/ui/components/UrlPreview.kt

@@ -8,6 +8,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import com.vitorpamplona.amethyst.model.ConnectivityType
 import com.vitorpamplona.amethyst.model.UrlCachedPreviewer
 import com.vitorpamplona.amethyst.service.connectivitystatus.ConnectivityStatus
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
@@ -16,13 +17,12 @@ import kotlinx.coroutines.launch
 
 @Composable
 fun UrlPreview(url: String, urlText: String, accountViewModel: AccountViewModel) {
-    val settings = accountViewModel.account.settings
-    val isMobile = ConnectivityStatus.isOnMobileData.value
-
-    val automaticallyShowUrlPreview = when (settings.automaticallyShowUrlPreview) {
-        true -> !isMobile
-        false -> false
-        else -> true
+    val automaticallyShowUrlPreview = remember {
+        when (accountViewModel.account.settings.automaticallyShowUrlPreview) {
+            ConnectivityType.WIFI_ONLY -> !ConnectivityStatus.isOnMobileData.value
+            ConnectivityType.NEVER -> false
+            ConnectivityType.ALWAYS -> true
+        }
     }
 
     if (!automaticallyShowUrlPreview) {

app/src/main/java/com/vitorpamplona/amethyst/ui/components/UrlPreviewCard.kt

@@ -1,6 +1,5 @@
 package com.vitorpamplona.amethyst.ui.components
 
-import androidx.compose.foundation.border
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -9,8 +8,8 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalUriHandler
@@ -19,11 +18,11 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import coil.compose.AsyncImage
 import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.model.ConnectivityType
 import com.vitorpamplona.amethyst.service.connectivitystatus.ConnectivityStatus
 import com.vitorpamplona.amethyst.service.previews.UrlInfoItem
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
-import com.vitorpamplona.amethyst.ui.theme.QuoteBorder
-import com.vitorpamplona.amethyst.ui.theme.subtleBorder
+import com.vitorpamplona.amethyst.ui.theme.innerPostModifier
 
 @Composable
 fun UrlPreviewCard(
@@ -31,13 +30,12 @@ fun UrlPreviewCard(
     previewInfo: UrlInfoItem,
     accountViewModel: AccountViewModel
 ) {
-    val settings = accountViewModel.account.settings
-    val isMobile = ConnectivityStatus.isOnMobileData.value
-
-    val automaticallyShowUrlPreview = when (settings.automaticallyShowUrlPreview) {
-        true -> !isMobile
-        false -> false
-        else -> true
+    val automaticallyShowUrlPreview = remember {
+        when (accountViewModel.account.settings.automaticallyShowUrlPreview) {
+            ConnectivityType.WIFI_ONLY -> !ConnectivityStatus.isOnMobileData.value
+            ConnectivityType.NEVER -> false
+            ConnectivityType.ALWAYS -> true
+        }
     }
 
     if (!automaticallyShowUrlPreview) {
@@ -46,14 +44,10 @@ fun UrlPreviewCard(
         val uri = LocalUriHandler.current
 
         Row(
-            modifier = Modifier
-                .clickable { runCatching { uri.openUri(url) } }
-                .clip(shape = QuoteBorder)
-                .border(
-                    1.dp,
-                    MaterialTheme.colors.subtleBorder,
-                    QuoteBorder
-                )
+            modifier = MaterialTheme.colors.innerPostModifier
+                .clickable {
+                    runCatching { uri.openUri(url) }
+                }
         ) {
             Column {
                 AsyncImage(

app/src/main/java/com/vitorpamplona/amethyst/ui/components/VideoView.kt

@@ -1,27 +1,25 @@
 package com.vitorpamplona.amethyst.ui.components
 
+import android.graphics.Rect
 import android.graphics.drawable.Drawable
+import android.net.Uri
 import android.util.Log
 import android.view.View
 import android.view.ViewGroup
 import android.widget.FrameLayout
+import androidx.annotation.OptIn
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.foundation.layout.defaultMinSize
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
-import androidx.compose.material.Icon
 import androidx.compose.material.IconButton
 import androidx.compose.material.MaterialTheme
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.VolumeOff
-import androidx.compose.material.icons.filled.VolumeUp
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
@@ -30,7 +28,7 @@ import androidx.compose.runtime.Stable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
-import androidx.compose.runtime.rememberUpdatedState
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -47,34 +45,42 @@ import androidx.compose.ui.unit.isFinite
 import androidx.compose.ui.viewinterop.AndroidView
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
+import androidx.media3.common.MediaItem
+import androidx.media3.common.MediaMetadata
+import androidx.media3.common.Player
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.session.MediaController
+import androidx.media3.ui.AspectRatioFrameLayout
+import androidx.media3.ui.PlayerView
 import coil.imageLoader
 import coil.request.ImageRequest
-import com.google.android.exoplayer2.C
-import com.google.android.exoplayer2.ExoPlayer
-import com.google.android.exoplayer2.MediaItem
-import com.google.android.exoplayer2.Player
-import com.google.android.exoplayer2.ext.okhttp.OkHttpDataSource
-import com.google.android.exoplayer2.source.ProgressiveMediaSource
-import com.google.android.exoplayer2.source.hls.HlsMediaSource
-import com.google.android.exoplayer2.ui.AspectRatioFrameLayout
-import com.google.android.exoplayer2.ui.StyledPlayerView
-import com.google.android.exoplayer2.upstream.DataSource
-import com.vitorpamplona.amethyst.VideoCache
-import com.vitorpamplona.amethyst.service.HttpClient
+import com.vitorpamplona.amethyst.PlaybackClientController
+import com.vitorpamplona.amethyst.model.ConnectivityType
 import com.vitorpamplona.amethyst.service.connectivitystatus.ConnectivityStatus
+import com.vitorpamplona.amethyst.ui.note.LyricsIcon
+import com.vitorpamplona.amethyst.ui.note.LyricsOffIcon
+import com.vitorpamplona.amethyst.ui.note.MuteIcon
+import com.vitorpamplona.amethyst.ui.note.MutedIcon
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.theme.PinBottomIconSize
+import com.vitorpamplona.amethyst.ui.theme.Size22Modifier
+import com.vitorpamplona.amethyst.ui.theme.Size50Modifier
+import com.vitorpamplona.amethyst.ui.theme.VolumeBottomIconSize
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
-import kotlin.time.ExperimentalTime
-import kotlin.time.measureTimedValue
+import java.util.UUID
+import kotlin.math.abs
 
 public var DefaultMutedSetting = mutableStateOf(true)
 
 @Composable
 fun LoadThumbAndThenVideoView(
     videoUri: String,
-    description: String? = null,
+    title: String? = null,
     thumbUri: String,
+    authorName: String? = null,
+    nostrUriCallback: String? = null,
     accountViewModel: AccountViewModel,
     onDialog: ((Boolean) -> Unit)? = null
 ) {
@@ -101,161 +107,360 @@ fun LoadThumbAndThenVideoView(
 
     if (loadingFinished.first) {
         if (loadingFinished.second != null) {
-            VideoView(videoUri, description, VideoThumb(loadingFinished.second), accountViewModel, onDialog = onDialog)
+            VideoView(
+                videoUri = videoUri,
+                title = title,
+                thumb = VideoThumb(loadingFinished.second),
+                artworkUri = thumbUri,
+                authorName = authorName,
+                nostrUriCallback = nostrUriCallback,
+                accountViewModel = accountViewModel,
+                onDialog = onDialog
+            )
         } else {
-            VideoView(videoUri, description, null, accountViewModel, onDialog = onDialog)
+            VideoView(
+                videoUri = videoUri,
+                title = title,
+                thumb = null,
+                artworkUri = thumbUri,
+                authorName = authorName,
+                nostrUriCallback = nostrUriCallback,
+                accountViewModel = accountViewModel,
+                onDialog = onDialog
+            )
         }
     }
 }
 
-@OptIn(ExperimentalTime::class)
 @Composable
 fun VideoView(
     videoUri: String,
-    description: String? = null,
+    title: String? = null,
     thumb: VideoThumb? = null,
+    artworkUri: String? = null,
+    authorName: String? = null,
+    nostrUriCallback: String? = null,
+    onDialog: ((Boolean) -> Unit)? = null,
     accountViewModel: AccountViewModel,
+    alwaysShowVideo: Boolean = false
+) {
+    val defaultToStart by remember(videoUri) { mutableStateOf(DefaultMutedSetting.value) }
+
+    VideoViewInner(
+        videoUri,
+        defaultToStart,
+        title,
+        thumb,
+        artworkUri,
+        authorName,
+        nostrUriCallback,
+        alwaysShowVideo,
+        accountViewModel,
+        onDialog
+    )
+}
+
+@Composable
+@androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
+fun VideoViewInner(
+    videoUri: String,
+    defaultToStart: Boolean = false,
+    title: String? = null,
+    thumb: VideoThumb? = null,
+    artworkUri: String? = null,
+    authorName: String? = null,
+    nostrUriCallback: String? = null,
     alwaysShowVideo: Boolean = false,
+    accountViewModel: AccountViewModel,
     onDialog: ((Boolean) -> Unit)? = null
 ) {
-    val (value, elapsed) = measureTimedValue {
-        VideoView1(videoUri, description, thumb, onDialog, accountViewModel, alwaysShowVideo)
-    }
-    Log.d("Rendering Metrics", "VideoView $elapsed $videoUri")
-}
-
-@Composable
-fun VideoView1(
-    videoUri: String,
-    description: String? = null,
-    thumb: VideoThumb? = null,
-    onDialog: ((Boolean) -> Unit)? = null,
-    accountViewModel: AccountViewModel,
-    alwaysShowVideo: Boolean = false
-) {
-    var exoPlayerData by remember { mutableStateOf<VideoPlayer?>(null) }
-    val defaultToStart by remember { mutableStateOf(DefaultMutedSetting.value) }
-    val context = LocalContext.current
-
-    LaunchedEffect(key1 = videoUri) {
-        if (exoPlayerData == null) {
-            launch(Dispatchers.Default) {
-                exoPlayerData = VideoPlayer(ExoPlayer.Builder(context).build())
-            }
-        }
-    }
-
-    exoPlayerData?.let {
-        VideoView(videoUri, description, it, defaultToStart, thumb, onDialog, accountViewModel, alwaysShowVideo)
-    }
-
-    DisposableEffect(Unit) {
-        onDispose {
-            exoPlayerData?.exoPlayer?.release()
-        }
-    }
-}
-
-@OptIn(ExperimentalTime::class)
-@Composable
-fun VideoView(
-    videoUri: String,
-    description: String? = null,
-    exoPlayerData: VideoPlayer,
-    defaultToStart: Boolean = false,
-    thumb: VideoThumb? = null,
-    onDialog: ((Boolean) -> Unit)? = null,
-    accountViewModel: AccountViewModel,
-    alwaysShowVideo: Boolean = false
-) {
-    val (_, elapsed) = measureTimedValue {
-        VideoView1(videoUri, description, exoPlayerData, defaultToStart, thumb, onDialog, accountViewModel, alwaysShowVideo)
-    }
-    Log.d("Rendering Metrics", "VideoView $elapsed $videoUri")
-}
-
-@Composable
-fun VideoView1(
-    videoUri: String,
-    description: String? = null,
-    exoPlayerData: VideoPlayer,
-    defaultToStart: Boolean = false,
-    thumb: VideoThumb? = null,
-    onDialog: ((Boolean) -> Unit)? = null,
-    accountViewModel: AccountViewModel,
-    alwaysShowVideo: Boolean = false
-) {
-    val lifecycleOwner = rememberUpdatedState(LocalLifecycleOwner.current)
-
-    val media = remember { MediaItem.Builder().setUri(videoUri).build() }
-
-    val settings = accountViewModel.account.settings
-    val isMobile = ConnectivityStatus.isOnMobileData.value
-
     val automaticallyStartPlayback = remember {
         mutableStateOf(
             if (alwaysShowVideo) { true } else {
-                when (settings.automaticallyStartPlayback) {
-                    true -> !isMobile
-                    false -> false
-                    else -> true
+                when (accountViewModel.account.settings.automaticallyStartPlayback) {
+                    ConnectivityType.WIFI_ONLY -> !ConnectivityStatus.isOnMobileData.value
+                    ConnectivityType.NEVER -> false
+                    ConnectivityType.ALWAYS -> true
                 }
             }
         )
     }
 
-    exoPlayerData.exoPlayer.apply {
-        repeatMode = Player.REPEAT_MODE_ALL
-        videoScalingMode = C.VIDEO_SCALING_MODE_SCALE_TO_FIT
-        volume = if (defaultToStart) 0f else 1f
-        if (videoUri.startsWith("file")) {
-            setMediaItem(media)
-        } else if (videoUri.endsWith("m3u8")) {
-            // Should not use cache.
-            val dataSourceFactory: DataSource.Factory = OkHttpDataSource.Factory(HttpClient.getHttpClient())
-            setMediaSource(
-                HlsMediaSource.Factory(dataSourceFactory).createMediaSource(
-                    media
-                )
-            )
-        } else {
-            setMediaSource(
-                ProgressiveMediaSource.Factory(VideoCache.get()).createMediaSource(
-                    media
-                )
-            )
-        }
-        prepare()
-    }
-
     if (!automaticallyStartPlayback.value) {
         ImageUrlWithDownloadButton(url = videoUri, showImage = automaticallyStartPlayback)
     } else {
-        RenderVideoPlayer(exoPlayerData, thumb, automaticallyStartPlayback, onDialog)
-    }
-
-    DisposableEffect(Unit) {
-        val observer = LifecycleEventObserver { _, event ->
-            when (event) {
-                Lifecycle.Event.ON_PAUSE -> {
-                    exoPlayerData.exoPlayer.pause()
-                }
-                else -> {}
+        VideoPlayerMutex(videoUri) { activeOnScreen ->
+            val mediaItem = remember(videoUri) {
+                MediaItem.Builder()
+                    .setMediaId(videoUri)
+                    .setUri(videoUri)
+                    .setMediaMetadata(
+                        MediaMetadata.Builder()
+                            .setArtist(authorName?.ifBlank { null })
+                            .setTitle(title?.ifBlank { null } ?: videoUri)
+                            .setArtworkUri(
+                                try {
+                                    if (artworkUri != null) {
+                                        Uri.parse(artworkUri)
+                                    } else {
+                                        null
+                                    }
+                                } catch (e: Exception) {
+                                    null
+                                }
+                            )
+                            .build()
+                    )
+                    .build()
             }
-        }
-        val lifecycle = lifecycleOwner.value.lifecycle
 
-        lifecycle.addObserver(observer)
-        onDispose {
-            lifecycle.removeObserver(observer)
+            GetVideoController(
+                mediaItem = mediaItem,
+                videoUri = videoUri,
+                defaultToStart = defaultToStart,
+                nostrUriCallback = nostrUriCallback
+            ) { controller, keepPlaying ->
+                RenderVideoPlayer(controller, thumb, keepPlaying, automaticallyStartPlayback, activeOnScreen, onDialog)
+            }
         }
     }
 }
 
+@Composable
+@OptIn(UnstableApi::class)
+fun GetVideoController(
+    mediaItem: MediaItem,
+    videoUri: String,
+    defaultToStart: Boolean = false,
+    nostrUriCallback: String? = null,
+    inner: @Composable (controller: MediaController, keepPlaying: MutableState<Boolean>) -> Unit
+) {
+    val context = LocalContext.current
+
+    val controller = remember(videoUri) {
+        mutableStateOf<MediaController?>(
+            if (videoUri == keepPlayingMutex?.currentMediaItem?.mediaId) keepPlayingMutex else null
+        )
+    }
+
+    val keepPlaying = remember(videoUri) {
+        mutableStateOf<Boolean>(
+            keepPlayingMutex != null && controller.value == keepPlayingMutex
+        )
+    }
+
+    val uid = remember(videoUri) {
+        UUID.randomUUID().toString()
+    }
+
+    // Prepares a VideoPlayer from the foreground service.
+    LaunchedEffect(key1 = videoUri) {
+        // If it is not null, the user might have come back from a playing video, like clicking on
+        // the notification of the video player.
+        if (controller.value == null) {
+            launch(Dispatchers.IO) {
+                PlaybackClientController.prepareController(
+                    uid,
+                    videoUri,
+                    nostrUriCallback,
+                    context
+                ) {
+                    // checks again because of race conditions.
+                    if (controller.value == null) { // still prone to race conditions.
+                        controller.value = it
+
+                        if (!it.isPlaying) {
+                            if (keepPlayingMutex?.isPlaying == true) {
+                                // There is a video playing, start this one on mute.
+                                controller.value?.volume = 0f
+                            } else {
+                                // There is no other video playing. Use the default mute state to
+                                // decide if sound is on or not.
+                                controller.value?.volume = if (defaultToStart) 0f else 1f
+                            }
+                        }
+
+                        controller.value?.setMediaItem(mediaItem)
+                        controller.value?.prepare()
+                    } else if (controller.value != it) {
+                        // discards the new controller because there is an existing one
+                        it.stop()
+                        it.release()
+
+                        controller.value?.let {
+                            if (it.playbackState == Player.STATE_IDLE || it.playbackState == Player.STATE_ENDED) {
+                                if (it.isPlaying) {
+                                    // There is a video playing, start this one on mute.
+                                    it.volume = 0f
+                                } else {
+                                    // There is no other video playing. Use the default mute state to
+                                    // decide if sound is on or not.
+                                    it.volume = if (defaultToStart) 0f else 1f
+                                }
+
+                                it.setMediaItem(mediaItem)
+                                it.prepare()
+                            }
+                        }
+                    }
+                }
+            }
+        } else {
+            controller.value?.let {
+                if (it.playbackState == Player.STATE_IDLE || it.playbackState == Player.STATE_ENDED) {
+                    if (it.isPlaying) {
+                        // There is a video playing, start this one on mute.
+                        it.volume = 0f
+                    } else {
+                        // There is no other video playing. Use the default mute state to
+                        // decide if sound is on or not.
+                        it.volume = if (defaultToStart) 0f else 1f
+                    }
+
+                    it.setMediaItem(mediaItem)
+                    it.prepare()
+                }
+            }
+        }
+    }
+
+    controller.value?.let {
+        inner(it, keepPlaying)
+    }
+
+    // User pauses and resumes the app. What to do with videos?
+    val scope = rememberCoroutineScope()
+    val lifeCycleOwner = LocalLifecycleOwner.current
+    DisposableEffect(key1 = videoUri) {
+        val observer = LifecycleEventObserver { _, event ->
+            if (event == Lifecycle.Event.ON_RESUME) {
+                // if the controller is null, restarts the controller with a new one
+                // if the controller is not null, just continue playing what the controller was playing
+                if (controller.value == null) {
+                    scope.launch(Dispatchers.IO) {
+                        PlaybackClientController.prepareController(
+                            UUID.randomUUID().toString(),
+                            videoUri,
+                            nostrUriCallback,
+                            context
+                        ) {
+                            // checks again to make sure no other thread has created a controller.
+                            if (controller.value == null) {
+                                controller.value = it
+
+                                if (!it.isPlaying) {
+                                    if (keepPlayingMutex?.isPlaying == true) {
+                                        // There is a video playing, start this one on mute.
+                                        controller.value?.volume = 0f
+                                    } else {
+                                        // There is no other video playing. Use the default mute state to
+                                        // decide if sound is on or not.
+                                        controller.value?.volume = if (defaultToStart) 0f else 1f
+                                    }
+                                }
+
+                                controller.value?.setMediaItem(mediaItem)
+                                controller.value?.prepare()
+                            } else if (controller.value != it) {
+                                // discards the new controller because there is an existing one
+                                it.stop()
+                                it.release()
+                            }
+                        }
+                    }
+                }
+            }
+            if (event == Lifecycle.Event.ON_PAUSE) {
+                if (!keepPlaying.value) {
+                    // Stops and releases the media.
+                    controller.value?.stop()
+                    controller.value?.release()
+                    controller.value = null
+                }
+            }
+        }
+
+        lifeCycleOwner.lifecycle.addObserver(observer)
+        onDispose {
+            lifeCycleOwner.lifecycle.removeObserver(observer)
+
+            if (!keepPlaying.value) {
+                // Stops and releases the media.
+                controller.value?.stop()
+                controller.value?.release()
+                controller.value = null
+            }
+        }
+    }
+}
+
+// background playing mutex.
+var keepPlayingMutex: MediaController? = null
+
+// This keeps the position of all visible videos in the current screen.
+val trackingVideos = mutableListOf<VisibilityData>()
+
 @Stable
-data class VideoPlayer(
-    val exoPlayer: ExoPlayer
-)
+class VisibilityData() {
+    var distanceToCenter: Float? = null
+}
+
+/**
+ * This function selects only one Video to be active. The video that is closest to the center of
+ * the screen wins the mutex.
+ */
+@Composable
+fun VideoPlayerMutex(videoUri: String, inner: @Composable (MutableState<Boolean>) -> Unit) {
+    val myCache = remember(videoUri) {
+        VisibilityData()
+    }
+
+    // Is the current video the closest to the center?
+    val active = remember(videoUri) {
+        mutableStateOf<Boolean>(false)
+    }
+
+    // Keep track of all available videos.
+    DisposableEffect(key1 = videoUri) {
+        trackingVideos.add(myCache)
+        onDispose {
+            trackingVideos.remove(myCache)
+        }
+    }
+
+    Box(
+        Modifier
+            .fillMaxWidth()
+            .defaultMinSize(minHeight = 70.dp)
+            .onVisiblePositionChanges { distanceToCenter ->
+                myCache.distanceToCenter = distanceToCenter
+
+                if (distanceToCenter != null) {
+                    // finds out of the current video is the closest to the center.
+                    var newActive = true
+                    for (video in trackingVideos) {
+                        val videoPos = video.distanceToCenter
+                        if (videoPos != null && videoPos < distanceToCenter) {
+                            newActive = false
+                            break
+                        }
+                    }
+
+                    // marks the current video active
+                    if (active.value != newActive) {
+                        active.value = newActive
+                    }
+                } else {
+                    // got out of screen, marks video as inactive
+                    if (active.value) {
+                        active.value = false
+                    }
+                }
+            }
+    ) {
+        inner(active)
+    }
+}
 
 @Stable
 data class VideoThumb(
@@ -263,35 +468,32 @@ data class VideoThumb(
 )
 
 @Composable
+@OptIn(UnstableApi::class)
 private fun RenderVideoPlayer(
-    playerData: VideoPlayer,
+    controller: MediaController,
     thumbData: VideoThumb?,
+    keepPlaying: MutableState<Boolean>,
     automaticallyStartPlayback: MutableState<Boolean>,
+    activeOnScreen: MutableState<Boolean>,
     onDialog: ((Boolean) -> Unit)?
 ) {
     val context = LocalContext.current
 
+    ControlWhenPlayerIsActive(controller, keepPlaying, automaticallyStartPlayback, activeOnScreen)
+
+    val controllerVisible = remember(controller) {
+        mutableStateOf(false)
+    }
+
     BoxWithConstraints() {
         AndroidView(
             modifier = Modifier
                 .fillMaxWidth()
                 .defaultMinSize(minHeight = 70.dp)
-                .align(Alignment.Center)
-                .onVisibilityChanges { visible ->
-                    if (!automaticallyStartPlayback.value) {
-                        playerData.exoPlayer.stop()
-                    }
-                    if (!automaticallyStartPlayback.value && visible && !playerData.exoPlayer.isPlaying) {
-                        playerData.exoPlayer.pause()
-                    } else if (visible && !playerData.exoPlayer.isPlaying) {
-                        playerData.exoPlayer.play()
-                    } else if (!visible && playerData.exoPlayer.isPlaying) {
-                        playerData.exoPlayer.pause()
-                    }
-                },
+                .align(Alignment.Center),
             factory = {
-                StyledPlayerView(context).apply {
-                    player = playerData.exoPlayer
+                PlayerView(context).apply {
+                    player = controller
                     layoutParams = FrameLayout.LayoutParams(
                         ViewGroup.LayoutParams.MATCH_PARENT,
                         ViewGroup.LayoutParams.WRAP_CONTENT
@@ -303,18 +505,104 @@ private fun RenderVideoPlayer(
                         if (maxHeight.isFinite) AspectRatioFrameLayout.RESIZE_MODE_FIT else AspectRatioFrameLayout.RESIZE_MODE_FIXED_WIDTH
                     onDialog?.let { innerOnDialog ->
                         setFullscreenButtonClickListener {
-                            playerData.exoPlayer.pause()
+                            controller.pause()
                             innerOnDialog(it)
                         }
                     }
+                    setControllerVisibilityListener(
+                        PlayerView.ControllerVisibilityListener {
+                            controllerVisible.value = it == View.VISIBLE
+                        }
+                    )
                 }
             }
         )
 
-        MuteButton() { mute: Boolean ->
+        val startingMuteState = remember(controller) {
+            controller.volume < 0.001
+        }
+
+        MuteButton(controllerVisible, startingMuteState) { mute: Boolean ->
+            // makes the new setting the default for new creations.
             DefaultMutedSetting.value = mute
 
-            playerData.exoPlayer.volume = if (mute) 0f else 1f
+            // if the user unmutes a video and it's not the current playing, switches to that one.
+            if (!mute && keepPlayingMutex != null && keepPlayingMutex != controller) {
+                keepPlayingMutex?.stop()
+                keepPlayingMutex?.release()
+                keepPlayingMutex = null
+            }
+
+            controller.volume = if (mute) 0f else 1f
+        }
+
+        KeepPlayingButton(keepPlaying, controllerVisible, Modifier.align(Alignment.TopEnd)) { newKeepPlaying: Boolean ->
+            // If something else is playing and the user marks this video to keep playing, stops the other one.
+            if (newKeepPlaying) {
+                if (keepPlayingMutex != null && keepPlayingMutex != controller) {
+                    keepPlayingMutex?.stop()
+                    keepPlayingMutex?.release()
+                }
+                keepPlayingMutex = controller
+            } else {
+                if (keepPlayingMutex == controller) {
+                    keepPlayingMutex = null
+                }
+            }
+
+            keepPlaying.value = newKeepPlaying
+        }
+    }
+}
+
+@Composable
+fun ControlWhenPlayerIsActive(
+    controller: Player,
+    keepPlaying: MutableState<Boolean>,
+    automaticallyStartPlayback: MutableState<Boolean>,
+    activeOnScreen: MutableState<Boolean>
+) {
+    // active means being fully visible
+    if (activeOnScreen.value) {
+        // should auto start video from settings?
+        if (!automaticallyStartPlayback.value) {
+            if (controller.isPlaying) {
+                // if it is visible, it's playing but it wasn't supposed to start automatically.
+                controller.pause()
+            }
+        } else if (!controller.isPlaying) {
+            // if it is visible, was supposed to start automatically, but it's not
+
+            // If something else is playing, play on mute.
+            if (keepPlayingMutex != null && keepPlayingMutex != controller) {
+                controller.volume = 0f
+            }
+            controller.play()
+        }
+    } else {
+        // Pauses the video when it becomes invisible.
+        // Destroys the video later when it Disposes the element
+        // meanwhile if the user comes back, the position in the track is saved.
+        if (!keepPlaying.value) {
+            controller.pause()
+        }
+    }
+
+    val view = LocalView.current
+
+    // Keeps the screen on while playing and viewing videos.
+    DisposableEffect(key1 = controller) {
+        val listener = object : Player.Listener {
+            override fun onIsPlayingChanged(isPlaying: Boolean) {
+                // doesn't consider the mutex because the screen can turn off if the video
+                // being played in the mutex is not visible.
+                view.keepScreenOn = isPlaying
+            }
+        }
+
+        controller.addListener(listener)
+        onDispose {
+            controller.removeListener(listener)
         }
     }
 }
@@ -335,12 +623,15 @@ fun Modifier.onVisibilityChanges(onVisibilityChanges: (Boolean) -> Unit): Modifi
 fun LayoutCoordinates.isCompletelyVisible(view: View): Boolean {
     if (!isAttached) return false
     // Window relative bounds of our compose root view that are visible on the screen
-    val globalRootRect = android.graphics.Rect()
+    val globalRootRect = Rect()
     if (!view.getGlobalVisibleRect(globalRootRect)) {
         // we aren't visible at all.
         return false
     }
     val bounds = boundsInWindow()
+
+    if (bounds.isEmpty) return false
+
     // Make sure we are completely in bounds.
     return bounds.top >= globalRootRect.top &&
         bounds.left >= globalRootRect.left &&
@@ -348,47 +639,127 @@ fun LayoutCoordinates.isCompletelyVisible(view: View): Boolean {
         bounds.bottom <= globalRootRect.bottom
 }
 
-@Composable
-private fun MuteButton(toggle: (Boolean) -> Unit) {
-    Box(
-        remember {
-            Modifier
-                .width(70.dp)
-                .height(70.dp)
-                .padding(10.dp)
-        }
+fun Modifier.onVisiblePositionChanges(onVisiblePosition: (Float?) -> Unit): Modifier = composed {
+    val view = LocalView.current
+
+    onGloballyPositioned { coordinates ->
+        onVisiblePosition(coordinates.getDistanceToVertCenterIfVisible(view))
+    }
+}
+
+fun LayoutCoordinates.getDistanceToVertCenterIfVisible(view: View): Float? {
+    if (!isAttached) return null
+    // Window relative bounds of our compose root view that are visible on the screen
+    val globalRootRect = Rect()
+    if (!view.getGlobalVisibleRect(globalRootRect)) {
+        // we aren't visible at all.
+        return null
+    }
+
+    val bounds = boundsInWindow()
+
+    if (bounds.isEmpty) return null
+
+    // Make sure we are completely in bounds.
+    if (bounds.top >= globalRootRect.top &&
+        bounds.left >= globalRootRect.left &&
+        bounds.right <= globalRootRect.right &&
+        bounds.bottom <= globalRootRect.bottom
     ) {
-        Box(
-            Modifier
-                .clip(CircleShape)
-                .fillMaxSize(0.6f)
-                .align(Alignment.Center)
-                .background(MaterialTheme.colors.background)
+        return abs(((bounds.top + bounds.bottom) / 2) - ((globalRootRect.top + globalRootRect.bottom) / 2))
+    }
+
+    return null
+}
+
+@Composable
+private fun MuteButton(
+    controllerVisible: MutableState<Boolean>,
+    startingMuteState: Boolean,
+    toggle: (Boolean) -> Unit
+) {
+    val holdOn = remember {
+        mutableStateOf<Boolean>(
+            true
         )
+    }
 
-        val mutedInstance = remember { mutableStateOf(DefaultMutedSetting.value) }
+    LaunchedEffect(key1 = controllerVisible) {
+        launch(Dispatchers.Default) {
+            delay(2000)
+            holdOn.value = false
+        }
+    }
 
-        IconButton(
-            onClick = {
-                mutedInstance.value = !mutedInstance.value
-                toggle(mutedInstance.value)
-            },
-            modifier = Modifier.size(50.dp)
-        ) {
-            if (mutedInstance.value) {
-                Icon(
-                    imageVector = Icons.Default.VolumeOff,
-                    "Hash Verified",
-                    tint = MaterialTheme.colors.onBackground,
-                    modifier = Modifier.size(30.dp)
-                )
-            } else {
-                Icon(
-                    imageVector = Icons.Default.VolumeUp,
-                    "Hash Verified",
-                    tint = MaterialTheme.colors.onBackground,
-                    modifier = Modifier.size(30.dp)
-                )
+    val mutedInstance = remember(startingMuteState) { mutableStateOf(startingMuteState) }
+
+    AnimatedVisibility(
+        visible = holdOn.value || controllerVisible.value,
+        enter = fadeIn(),
+        exit = fadeOut()
+    ) {
+        Box(modifier = VolumeBottomIconSize) {
+            Box(
+                Modifier
+                    .clip(CircleShape)
+                    .fillMaxSize(0.6f)
+                    .align(Alignment.Center)
+                    .background(MaterialTheme.colors.background)
+            )
+
+            IconButton(
+                onClick = {
+                    mutedInstance.value = !mutedInstance.value
+                    toggle(mutedInstance.value)
+                },
+                modifier = Size50Modifier
+            ) {
+                if (mutedInstance.value) {
+                    MutedIcon()
+                } else {
+                    MuteIcon()
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun KeepPlayingButton(
+    keepPlayingStart: MutableState<Boolean>,
+    controllerVisible: MutableState<Boolean>,
+    alignment: Modifier,
+    toggle: (Boolean) -> Unit
+) {
+    val keepPlaying = remember(keepPlayingStart.value) { mutableStateOf(keepPlayingStart.value) }
+
+    AnimatedVisibility(
+        visible = controllerVisible.value,
+        modifier = alignment,
+        enter = fadeIn(),
+        exit = fadeOut()
+    ) {
+        Box(modifier = PinBottomIconSize) {
+            Box(
+                Modifier
+                    .clip(CircleShape)
+                    .fillMaxSize(0.6f)
+                    .align(Alignment.Center)
+                    .background(MaterialTheme.colors.background)
+            )
+
+            IconButton(
+                onClick = {
+                    keepPlaying.value = !keepPlaying.value
+                    toggle(keepPlaying.value)
+                },
+                modifier = Size50Modifier
+            ) {
+                if (keepPlaying.value) {
+                    LyricsIcon(Size22Modifier, MaterialTheme.colors.onBackground)
+                } else {
+                    LyricsOffIcon(Size22Modifier, MaterialTheme.colors.onBackground)
+                }
             }
         }
     }