Merge branch 'main' of https://github.com/vitorpamplona/amethyst

Translations - Tamil tech terms updated

.idea/kotlinc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="KotlinJpsPluginSettings">
-    <option name="version" value="1.8.21" />
+    <option name="version" value="1.9.0" />
   </component>
 </project>

README.md

@@ -4,6 +4,11 @@
 
 Amethyst brings the best social network to your Android phone. Just insert your Nostr private key and start posting. 
 
+[<img src="./docs/design/obtainium.png"
+alt="Get it on Obtaininum"
+height="80">](https://github.com/ImranR98/Obtainium)
+[<img src="https://github.com/machiav3lli/oandbackupx/raw/034b226cea5c1b30eb4f6a6f313e4dadcbb0ece4/badge_github.png" alt="Get it on GitHub"
+height="80">](https://github.com/vitorpamplona/amethyst/releases)
 [<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png"
      alt="Get it on F-Droid"
      height="80">](https://f-droid.org/packages/com.vitorpamplona.amethyst/)
@@ -11,8 +16,6 @@ Amethyst brings the best social network to your Android phone. Just insert your
      alt="Get it on Google Play"
      height="80">](https://play.google.com/store/apps/details?id=com.vitorpamplona.amethyst)
 
-Or get the latest APK from the [Releases Section](https://github.com/vitorpamplona/amethyst/releases/latest).
-
 # Current Features
 
 - [x] Event Builders / WebSocket Subscriptions (NIP-01)
@@ -38,7 +41,7 @@ Or get the latest APK from the [Releases Section](https://github.com/vitorpamplo
 - [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)
@@ -60,7 +63,7 @@ Or get the latest APK from the [Releases Section](https://github.com/vitorpamplo
 - [x] Custom Emoji (NIP-30)
 - [x] Zap Forwarding (NIP-57)
 - [x] Text Note References (NIP-27)
-- [x] Audio Tracks (zapstr.live) (NIP-TBD)
+- [x] Audio Tracks (zapstr.live) (Kind:31337)
 - [x] Push Notifications (Zaps and Messages)
 - [x] Generic Tags (NIP-12)
 - [x] Sensitive Content (NIP-36)
@@ -68,10 +71,14 @@ Or get the latest APK from the [Releases Section](https://github.com/vitorpamplo
 - [x] Recommended Application Handlers (NIP-89)
 - [x] Events with a Subject (NIP-14)
 - [x] Generic Reposts (kind:16)
-- [x] Live Activities & Live Chats (NIP-102)
+- [x] Live Activities & Live Chats (NIP-53)
 - [x] Relay Pages (NIP-11)
 - [x] HTTP Auth (NIP-98)
 - [x] Zapraiser (NIP-TBD)
+- [x] Moderated Communities (NIP-172)
+- [x] Emoji Packs (Kind:30030)
+- [x] Personal Emoji Lists (Kind:10030)
+- [x] Classifieds (Kind:30403)
 - [ ] Marketplace (NIP-15)
 - [ ] Image/Video Capture in the app
 - [ ] Local Database
@@ -191,6 +198,12 @@ Information that you share is publicly visible to anyone reading from relays tha
 ## Information Permanence ##
 Information shared on nostr should be assumed permanent for privacy purposes. There is no way to guarantee deleting or editing any content once posted. 
 
+# Screenshots
+
+| Home Feed                                 | Messages                                     | Live Streams                                    | Notifications                                          |
+|-------------------------------------------|----------------------------------------------|-------------------------------------------------|--------------------------------------------------------|
+| ![Home Feed](./docs/screenshots/home.png) | ![Messages](./docs/screenshots/messages.png) | ![Live Streams](./docs/screenshots/replies.png) | ![Notifications](./docs/screenshots/notifications.png) |
+
 # Contributing
 
 [Issues](https://github.com/vitorpamplona/amethyst/issues) and [pull requests](https://github.com/vitorpamplona/amethyst/pulls) are very welcome.

app/build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id 'com.android.application'
     id 'org.jetbrains.kotlin.android'
-    id 'org.jlleitschuh.gradle.ktlint' version "11.3.1"
+    id 'org.jlleitschuh.gradle.ktlint' version "11.5.0"
     id 'com.google.gms.google-services'
 }
 
@@ -13,14 +13,14 @@ android {
         applicationId "com.vitorpamplona.amethyst"
         minSdk 26
         targetSdk 33
-        versionCode 223
-        versionName "0.62.2"
+        versionCode 267
+        versionName "0.72.0"
 
         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" )
+        resourceConfigurations += ['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 {
@@ -37,7 +37,7 @@ android {
         }
     }
 
-    flavorDimensions "channel"
+    flavorDimensions = ["channel"]
 
     productFlavors {
         play {
@@ -73,7 +73,7 @@ android {
     }
 
     composeOptions {
-        kotlinCompilerExtensionVersion "1.4.7"
+        kotlinCompilerExtensionVersion "1.5.1"
     }
 
     packagingOptions {
@@ -96,7 +96,7 @@ dependencies {
     implementation "androidx.fragment:fragment-ktx:$fragment_version"
 
     // Navigation
-    implementation("androidx.navigation:navigation-compose:$nav_version")
+    implementation "androidx.navigation:navigation-compose:$nav_version"
 
     // Observe Live data as State
     implementation "androidx.compose.runtime:runtime-livedata:$compose_ui_version"
@@ -108,22 +108,15 @@ dependencies {
     implementation "androidx.lifecycle:lifecycle-runtime-compose:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version"
     implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
-    implementation "androidx.lifecycle:lifecycle-livedata:$lifecycle_version"
+    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$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"
 
     // Bitcoin secp256k1 bindings to Android
-    implementation 'fr.acinq.secp256k1:secp256k1-kmp-jni-android:0.10.0'
-
-    // Nostr Base Protocol
-    implementation('com.github.vitorpamplona.NostrPostr:nostrpostrlib:master-SNAPSHOT') {
-        exclude group:'fr.acinq.secp256k1'
-        exclude module: 'guava'
-        exclude module: 'guava-testlib'
-    }
+    implementation 'fr.acinq.secp256k1:secp256k1-kmp-jni-android:0.10.1'
 
     // Websockets API
     implementation 'com.squareup.okhttp3:okhttp:5.0.0-alpha.11'
@@ -134,15 +127,14 @@ dependencies {
 
     // link preview
     implementation 'org.jsoup:jsoup:1.16.1'
-    //implementation 'tw.com.oneup.www:Baha-UrlPreview:1.0.1'
 
     // Encrypted Key Storage
     implementation 'androidx.security:security-crypto-ktx:1.1.0-alpha06'
 
     // view videos
-    implementation 'com.google.android.exoplayer:exoplayer:2.18.7'
+    implementation "androidx.media3:media3-exoplayer:${exoplayer_version}"
     // important for proxy / tor
-    implementation 'com.google.android.exoplayer:extension-okhttp:2.18.7'
+    implementation "androidx.media3:media3-datasource-okhttp:${exoplayer_version}"
 
     // Load images from the web.
     implementation "io.coil-kt:coil-compose:$coil_version"
@@ -161,7 +153,7 @@ dependencies {
     implementation "io.github.url-detector:url-detector:0.1.23"
 
     // For QR generation
-    implementation 'com.google.zxing:core:3.5.1'
+    implementation 'com.google.zxing:core:3.5.2'
     implementation 'com.journeyapps:zxing-android-embedded:4.3.0'
 
     // Markdown
@@ -170,9 +162,15 @@ dependencies {
     //implementation "com.halilibo.compose-richtext:richtext-commonmark:0.16.0"
 
     // Markdown (With fix for full-image bleeds)
-    implementation('com.github.vitorpamplona.compose-richtext:richtext-ui:main-SNAPSHOT')
-    implementation('com.github.vitorpamplona.compose-richtext:richtext-ui-material:main-SNAPSHOT')
-    implementation('com.github.vitorpamplona.compose-richtext:richtext-commonmark:main-SNAPSHOT')
+    implementation('com.github.vitorpamplona.compose-richtext:richtext-ui:a0954aba63')
+    implementation('com.github.vitorpamplona.compose-richtext:richtext-ui-material:a0954aba63')
+    implementation('com.github.vitorpamplona.compose-richtext:richtext-commonmark:a0954aba63')
+
+    // 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'
@@ -181,7 +179,7 @@ dependencies {
     playImplementation 'com.google.mlkit:translate:17.0.1'
 
     // PushNotifications
-    playImplementation platform('com.google.firebase:firebase-bom:32.1.0')
+    playImplementation platform('com.google.firebase:firebase-bom:32.2.0')
     playImplementation 'com.google.firebase:firebase-messaging-ktx'
 
     // Charts
@@ -193,14 +191,18 @@ dependencies {
     // immutable collections to avoid recomposition
     implementation("org.jetbrains.kotlinx:kotlinx-collections-immutable:0.3.5")
 
+    // GeoHash
+    implementation 'com.github.drfonfon:android-kotlin-geohash:1.0'
+
+    // LibSodium for XChaCha encryption
+    implementation "com.goterl:lazysodium-android:5.1.0@aar"
+    implementation 'net.java.dev.jna:jna:5.13.0@aar'
+
     // 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'
 
-    // Automatic memory leak detection
-    debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.11'
-
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'io.mockk:mockk:1.13.5'
     androidTestImplementation 'androidx.test.ext:junit:1.2.0-alpha01'

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

@@ -0,0 +1,102 @@
+package com.vitorpamplona.amethyst
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.vitorpamplona.amethyst.model.hexToByteArray
+import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
+import com.vitorpamplona.amethyst.service.KeyPair
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class CryptoUtilsTest {
+
+    @Test
+    fun testGetPublicFromPrivateKey() {
+        val privateKey = "f410f88bcec6cbfda04d6a273c7b1dd8bba144cd45b71e87109cfa11dd7ed561".hexToByteArray()
+        val publicKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
+        assertEquals("7d4b8806f1fd713c287235411bf95aa81b7242ead892733ec84b3f2719845be6", publicKey)
+    }
+
+    @Test
+    fun testSharedSecretCompatibilityWithCoracle() {
+        val privateKey = "f410f88bcec6cbfda04d6a273c7b1dd8bba144cd45b71e87109cfa11dd7ed561"
+        val publicKey = "765cd7cf91d3ad07423d114d5a39c61d52b2cdbc18ba055ddbbeec71fbe2aa2f"
+
+        val key = CryptoUtils.getSharedSecretNIP24(privateKey = privateKey.hexToByteArray(), pubKey = publicKey.hexToByteArray())
+
+        assertEquals("577c966f499dddd8e8dcc34e8f352e283cc177e53ae372794947e0b8ede7cfd8", key.toHexKey())
+    }
+
+    @Test
+    fun testSharedSecret() {
+        val sender = KeyPair()
+        val receiver = KeyPair()
+
+        val sharedSecret1 = CryptoUtils.getSharedSecretNIP24(sender.privKey!!, receiver.pubKey)
+        val sharedSecret2 = CryptoUtils.getSharedSecretNIP24(receiver.privKey!!, sender.pubKey)
+
+        assertEquals(sharedSecret1.toHexKey(), sharedSecret2.toHexKey())
+
+        val secretKey1 = KeyPair(privKey = sharedSecret1)
+        val secretKey2 = KeyPair(privKey = sharedSecret2)
+
+        assertEquals(secretKey1.pubKey.toHexKey(), secretKey2.pubKey.toHexKey())
+        assertEquals(secretKey1.privKey?.toHexKey(), secretKey2.privKey?.toHexKey())
+    }
+
+    @Test
+    fun encryptDecryptNIP4Test() {
+        val msg = "Hi"
+
+        val privateKey = CryptoUtils.privkeyCreate()
+        val publicKey = CryptoUtils.pubkeyCreate(privateKey)
+
+        val encrypted = CryptoUtils.encryptNIP04(msg, privateKey, publicKey)
+        val decrypted = CryptoUtils.decryptNIP04(encrypted, privateKey, publicKey)
+
+        assertEquals(msg, decrypted)
+    }
+
+    @Test
+    fun encryptDecryptNIP24Test() {
+        val msg = "Hi"
+
+        val privateKey = CryptoUtils.privkeyCreate()
+        val publicKey = CryptoUtils.pubkeyCreate(privateKey)
+
+        val encrypted = CryptoUtils.encryptNIP24(msg, privateKey, publicKey)
+        val decrypted = CryptoUtils.decryptNIP24(encrypted, privateKey, publicKey)
+
+        assertEquals(msg, decrypted)
+    }
+
+    @Test
+    fun encryptSharedSecretDecryptNIP4Test() {
+        val msg = "Hi"
+
+        val privateKey = CryptoUtils.privkeyCreate()
+        val publicKey = CryptoUtils.pubkeyCreate(privateKey)
+        val sharedSecret = CryptoUtils.getSharedSecretNIP04(privateKey, publicKey)
+
+        val encrypted = CryptoUtils.encryptNIP04(msg, sharedSecret)
+        val decrypted = CryptoUtils.decryptNIP04(encrypted, sharedSecret)
+
+        assertEquals(msg, decrypted)
+    }
+
+    @Test
+    fun encryptSharedSecretDecryptNIP24Test() {
+        val msg = "Hi"
+
+        val privateKey = CryptoUtils.privkeyCreate()
+        val publicKey = CryptoUtils.pubkeyCreate(privateKey)
+        val sharedSecret = CryptoUtils.getSharedSecretNIP24(privateKey, publicKey)
+
+        val encrypted = CryptoUtils.encryptNIP24(msg, sharedSecret)
+        val decrypted = CryptoUtils.decryptNIP24(encrypted, sharedSecret)
+
+        assertEquals(msg, decrypted)
+    }
+}

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

@@ -0,0 +1,561 @@
+package com.vitorpamplona.amethyst
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.vitorpamplona.amethyst.model.HexKey
+import com.vitorpamplona.amethyst.model.hexToByteArray
+import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.service.CryptoUtils
+import com.vitorpamplona.amethyst.service.KeyPair
+import com.vitorpamplona.amethyst.service.model.ChatMessageEvent
+import com.vitorpamplona.amethyst.service.model.Event
+import com.vitorpamplona.amethyst.service.model.GiftWrapEvent
+import com.vitorpamplona.amethyst.service.model.Gossip
+import com.vitorpamplona.amethyst.service.model.NIP24Factory
+import com.vitorpamplona.amethyst.service.model.SealedGossipEvent
+import com.vitorpamplona.amethyst.service.relays.Client
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Assert.fail
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class GiftWrapEventTest {
+    @Test()
+    fun testNip24Utils() {
+        val sender = KeyPair()
+        val receiver = KeyPair()
+        val message = "Hola, que tal?"
+
+        val events = NIP24Factory().createMsgNIP24(
+            message,
+            listOf(receiver.pubKey.toHexKey()),
+            sender.privKey!!
+        )
+
+        // Simulate Receiver
+        val eventsReceiverGets = events.filter { it.isTaggedUser(receiver.pubKey.toHexKey()) }
+        eventsReceiverGets.forEach {
+            val event = it.unwrap(receiver.privKey!!)
+            if (event is SealedGossipEvent) {
+                val innerData = event.unseal(receiver.privKey!!)
+                assertEquals(message, innerData?.content)
+            } else {
+                fail("Wrong Event")
+            }
+        }
+
+        // Simulate Sender
+        val eventsSenderGets = events.filter { it.isTaggedUser(sender.pubKey.toHexKey()) }
+        eventsSenderGets.forEach {
+            val event = it.unwrap(sender.privKey!!)
+            if (event is SealedGossipEvent) {
+                val innerData = event.unseal(sender.privKey!!)
+                assertEquals(message, innerData?.content)
+            } else {
+                fail("Wrong Event")
+            }
+        }
+    }
+
+    @Test()
+    fun testNip24UtilsForGroups() {
+        val sender = KeyPair()
+        val receiver1 = KeyPair()
+        val receiver2 = KeyPair()
+        val receiver3 = KeyPair()
+        val receiver4 = KeyPair()
+        val message = "Hola, que tal?"
+
+        val receivers = listOf(
+            receiver1,
+            receiver2,
+            receiver3,
+            receiver4
+        )
+
+        val events = NIP24Factory().createMsgNIP24(
+            message,
+            receivers.map { it.pubKey.toHexKey() },
+            sender.privKey!!
+        )
+
+        // Simulate Receiver
+        receivers.forEach { receiver ->
+            val eventsReceiverGets = events.filter { it.isTaggedUser(receiver.pubKey.toHexKey()) }
+            eventsReceiverGets.forEach {
+                val event = it.unwrap(receiver.privKey!!)
+                if (event is SealedGossipEvent) {
+                    val innerData = event.unseal(receiver.privKey!!)
+                    assertEquals(message, innerData?.content)
+                } else {
+                    fail("Wrong Event")
+                }
+            }
+        }
+
+        // Simulate Sender
+        val eventsSenderGets = events.filter { it.isTaggedUser(sender.pubKey.toHexKey()) }
+        eventsSenderGets.forEach {
+            val event = it.unwrap(sender.privKey!!)
+            if (event is SealedGossipEvent) {
+                val innerData = event.unseal(sender.privKey!!)
+                assertEquals(message, innerData?.content)
+            } else {
+                fail("Wrong Event")
+            }
+        }
+    }
+
+    @Test()
+    fun testInternalsSimpleMessage() {
+        val sender = KeyPair()
+        val receiver = KeyPair()
+
+        val senderMessage = ChatMessageEvent.create(
+            msg = "Hi There!",
+            to = listOf(receiver.pubKey.toHexKey()),
+            privateKey = sender.privKey!!
+        )
+
+        // MsgFor the Receiver
+
+        val encMsgFromSenderToReceiver = SealedGossipEvent.create(
+            event = senderMessage,
+            encryptTo = receiver.pubKey.toHexKey(),
+            privateKey = sender.privKey!!
+        )
+
+        // Should expose sender
+        assertEquals(encMsgFromSenderToReceiver.pubKey, sender.pubKey.toHexKey())
+        // Should not expose receiver
+        assertTrue(encMsgFromSenderToReceiver.tags.isEmpty())
+
+        val giftWrapEventToReceiver = GiftWrapEvent.create(
+            event = encMsgFromSenderToReceiver,
+            recipientPubKey = receiver.pubKey.toHexKey()
+        )
+
+        // Should not be signed by neither sender nor receiver
+        assertNotEquals(giftWrapEventToReceiver.pubKey, sender.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventToReceiver.pubKey, receiver.pubKey.toHexKey())
+
+        // Should not include sender as recipient
+        assertNotEquals(giftWrapEventToReceiver.recipientPubKey(), sender.pubKey.toHexKey())
+
+        // Should be addressed to the receiver
+        assertEquals(giftWrapEventToReceiver.recipientPubKey(), receiver.pubKey.toHexKey())
+
+        // MsgFor the Sender
+
+        val encMsgFromSenderToSender = SealedGossipEvent.create(
+            event = senderMessage,
+            encryptTo = sender.pubKey.toHexKey(),
+            privateKey = sender.privKey!!
+        )
+
+        // Should expose sender
+        assertEquals(encMsgFromSenderToSender.pubKey, sender.pubKey.toHexKey())
+        // Should not expose receiver
+        assertTrue(encMsgFromSenderToSender.tags.isEmpty())
+
+        val giftWrapEventToSender = GiftWrapEvent.create(
+            event = encMsgFromSenderToSender,
+            recipientPubKey = sender.pubKey.toHexKey()
+        )
+
+        // Should not be signed by neither the sender, not the receiver
+        assertNotEquals(giftWrapEventToSender.pubKey, sender.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventToSender.pubKey, receiver.pubKey.toHexKey())
+
+        // Should not be addressed to the receiver
+        assertNotEquals(giftWrapEventToSender.recipientPubKey(), receiver.pubKey.toHexKey())
+        // Should be addressed to the sender
+        assertEquals(giftWrapEventToSender.recipientPubKey(), sender.pubKey.toHexKey())
+
+        // Done
+
+        println(senderMessage.toJson())
+        println(encMsgFromSenderToReceiver.toJson())
+        println(giftWrapEventToReceiver.toJson())
+        println(giftWrapEventToSender.toJson())
+
+        // Receiver's side
+        // Unwrapping
+
+        val unwrappedMsgForSenderBySender = giftWrapEventToSender.unwrap(sender.privKey!!)
+        val unwrappedMsgForReceiverBySender = giftWrapEventToReceiver.unwrap(sender.privKey!!)
+
+        assertNotNull(unwrappedMsgForSenderBySender)
+        assertNull(unwrappedMsgForReceiverBySender)
+
+        val unwrappedMsgForSenderByReceiver = giftWrapEventToSender.unwrap(receiver.privKey!!)
+        val unwrappedMsgForReceiverByReceiver = giftWrapEventToReceiver.unwrap(receiver.privKey!!)
+
+        assertNull(unwrappedMsgForSenderByReceiver)
+        assertNotNull(unwrappedMsgForReceiverByReceiver)
+
+        assertEquals(SealedGossipEvent.kind, unwrappedMsgForSenderBySender?.kind)
+        assertEquals(SealedGossipEvent.kind, unwrappedMsgForReceiverByReceiver?.kind)
+
+        assertTrue(unwrappedMsgForSenderBySender is SealedGossipEvent)
+        assertTrue(unwrappedMsgForReceiverByReceiver is SealedGossipEvent)
+
+        if (unwrappedMsgForSenderBySender is SealedGossipEvent &&
+            unwrappedMsgForReceiverByReceiver is SealedGossipEvent
+        ) {
+            val unwrappedGossipToSenderByReceiver = unwrappedMsgForSenderBySender.unseal(receiver.privKey!!)
+            val unwrappedGossipToReceiverByReceiver = unwrappedMsgForReceiverByReceiver.unseal(receiver.privKey!!)
+
+            assertNull(unwrappedGossipToSenderByReceiver)
+            assertNotNull(unwrappedGossipToReceiverByReceiver)
+
+            val unwrappedGossipToSenderBySender = unwrappedMsgForSenderBySender.unseal(sender.privKey!!)
+            val unwrappedGossipToReceiverBySender = unwrappedMsgForReceiverByReceiver.unseal(sender.privKey!!)
+
+            assertNotNull(unwrappedGossipToSenderBySender)
+            assertNull(unwrappedGossipToReceiverBySender)
+
+            assertEquals("Hi There!", unwrappedGossipToReceiverByReceiver?.content)
+            assertEquals("Hi There!", unwrappedGossipToSenderBySender?.content)
+        } else {
+            fail()
+        }
+    }
+
+    @Test()
+    fun testInternalsGroupMessage() {
+        val sender = KeyPair()
+        val receiverA = KeyPair()
+        val receiverB = KeyPair()
+
+        val senderMessage = ChatMessageEvent.create(
+            msg = "Who is going to the party tonight?",
+            to = listOf(receiverA.pubKey.toHexKey(), receiverB.pubKey.toHexKey()),
+            privateKey = sender.privKey!!
+        )
+
+        val encMsgFromSenderToReceiverA = SealedGossipEvent.create(
+            event = senderMessage,
+            encryptTo = receiverA.pubKey.toHexKey(),
+            privateKey = sender.privKey!!
+        )
+
+        val encMsgFromSenderToReceiverB = SealedGossipEvent.create(
+            event = senderMessage,
+            encryptTo = receiverB.pubKey.toHexKey(),
+            privateKey = sender.privKey!!
+        )
+
+        val encMsgFromSenderToSender = SealedGossipEvent.create(
+            event = senderMessage,
+            encryptTo = sender.pubKey.toHexKey(),
+            privateKey = sender.privKey!!
+        )
+
+        // Should expose sender
+        assertEquals(encMsgFromSenderToReceiverA.pubKey, sender.pubKey.toHexKey())
+        // Should not expose receiver
+        assertTrue(encMsgFromSenderToReceiverA.tags.isEmpty())
+
+        // Should expose sender
+        assertEquals(encMsgFromSenderToReceiverB.pubKey, sender.pubKey.toHexKey())
+        // Should not expose receiver
+        assertTrue(encMsgFromSenderToReceiverB.tags.isEmpty())
+
+        // Should expose sender
+        assertEquals(encMsgFromSenderToSender.pubKey, sender.pubKey.toHexKey())
+        // Should not expose receiver
+        assertTrue(encMsgFromSenderToSender.tags.isEmpty())
+
+        val giftWrapEventForReceiverA = GiftWrapEvent.create(
+            event = encMsgFromSenderToReceiverA,
+            recipientPubKey = receiverA.pubKey.toHexKey()
+        )
+
+        val giftWrapEventForReceiverB = GiftWrapEvent.create(
+            event = encMsgFromSenderToReceiverB,
+            recipientPubKey = receiverB.pubKey.toHexKey()
+        )
+
+        // Should not be signed by neither sender nor receiver
+        assertNotEquals(giftWrapEventForReceiverA.pubKey, sender.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventForReceiverA.pubKey, receiverA.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventForReceiverA.pubKey, receiverB.pubKey.toHexKey())
+
+        // Should not include sender as recipient
+        assertNotEquals(giftWrapEventForReceiverA.recipientPubKey(), sender.pubKey.toHexKey())
+
+        // Should be addressed to the receiver
+        assertEquals(giftWrapEventForReceiverA.recipientPubKey(), receiverA.pubKey.toHexKey())
+
+        // Should not be signed by neither sender nor receiver
+        assertNotEquals(giftWrapEventForReceiverB.pubKey, sender.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventForReceiverB.pubKey, receiverA.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventForReceiverB.pubKey, receiverB.pubKey.toHexKey())
+
+        // Should not include sender as recipient
+        assertNotEquals(giftWrapEventForReceiverB.recipientPubKey(), sender.pubKey.toHexKey())
+
+        // Should be addressed to the receiver
+        assertEquals(giftWrapEventForReceiverB.recipientPubKey(), receiverB.pubKey.toHexKey())
+
+        val giftWrapEventToSender = GiftWrapEvent.create(
+            event = encMsgFromSenderToSender,
+            recipientPubKey = sender.pubKey.toHexKey()
+        )
+
+        // Should not be signed by neither the sender, not the receiver
+        assertNotEquals(giftWrapEventToSender.pubKey, sender.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventToSender.pubKey, receiverA.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventToSender.pubKey, receiverB.pubKey.toHexKey())
+
+        // Should not be addressed to the receiver
+        assertNotEquals(giftWrapEventToSender.recipientPubKey(), receiverA.pubKey.toHexKey())
+        assertNotEquals(giftWrapEventToSender.recipientPubKey(), receiverB.pubKey.toHexKey())
+        // Should be addressed to the sender
+        assertEquals(giftWrapEventToSender.recipientPubKey(), sender.pubKey.toHexKey())
+
+        println(senderMessage.toJson())
+        println(encMsgFromSenderToReceiverA.toJson())
+        println(encMsgFromSenderToReceiverB.toJson())
+        println(giftWrapEventForReceiverA.toJson())
+        println(giftWrapEventForReceiverB.toJson())
+        println(giftWrapEventToSender.toJson())
+
+        val unwrappedMsgForSenderBySender = giftWrapEventToSender.unwrap(sender.privKey!!)
+        val unwrappedMsgForReceiverBySenderA = giftWrapEventForReceiverA.unwrap(sender.privKey!!)
+        val unwrappedMsgForReceiverBySenderB = giftWrapEventForReceiverB.unwrap(sender.privKey!!)
+
+        assertNotNull(unwrappedMsgForSenderBySender)
+        assertNull(unwrappedMsgForReceiverBySenderA)
+        assertNull(unwrappedMsgForReceiverBySenderB)
+
+        val unwrappedMsgForSenderByReceiverA = giftWrapEventToSender.unwrap(receiverA.privKey!!)
+        val unwrappedMsgForReceiverAByReceiverA = giftWrapEventForReceiverA.unwrap(receiverA.privKey!!)
+        val unwrappedMsgForReceiverBByReceiverA = giftWrapEventForReceiverB.unwrap(receiverA.privKey!!)
+
+        assertNull(unwrappedMsgForSenderByReceiverA)
+        assertNotNull(unwrappedMsgForReceiverAByReceiverA)
+        assertNull(unwrappedMsgForReceiverBByReceiverA)
+
+        val unwrappedMsgForSenderByReceiverB = giftWrapEventToSender.unwrap(receiverB.privKey!!)
+        val unwrappedMsgForReceiverAByReceiverB = giftWrapEventForReceiverA.unwrap(receiverB.privKey!!)
+        val unwrappedMsgForReceiverBByReceiverB = giftWrapEventForReceiverB.unwrap(receiverB.privKey!!)
+
+        assertNull(unwrappedMsgForSenderByReceiverB)
+        assertNull(unwrappedMsgForReceiverAByReceiverB)
+        assertNotNull(unwrappedMsgForReceiverBByReceiverB)
+
+        assertEquals(SealedGossipEvent.kind, unwrappedMsgForSenderBySender?.kind)
+        assertEquals(SealedGossipEvent.kind, unwrappedMsgForReceiverAByReceiverA?.kind)
+        assertEquals(SealedGossipEvent.kind, unwrappedMsgForReceiverBByReceiverB?.kind)
+
+        assertTrue(unwrappedMsgForSenderBySender is SealedGossipEvent)
+        assertTrue(unwrappedMsgForReceiverAByReceiverA is SealedGossipEvent)
+        assertTrue(unwrappedMsgForReceiverBByReceiverB is SealedGossipEvent)
+
+        if (unwrappedMsgForSenderBySender is SealedGossipEvent &&
+            unwrappedMsgForReceiverAByReceiverA is SealedGossipEvent &&
+            unwrappedMsgForReceiverBByReceiverB is SealedGossipEvent
+        ) {
+            val unwrappedGossipToSenderByReceiverA = unwrappedMsgForSenderBySender.unseal(receiverA.privKey!!)
+            val unwrappedGossipToReceiverAByReceiverA = unwrappedMsgForReceiverAByReceiverA.unseal(receiverA.privKey!!)
+            val unwrappedGossipToReceiverBByReceiverA = unwrappedMsgForReceiverBByReceiverB.unseal(receiverA.privKey!!)
+
+            assertNull(unwrappedGossipToSenderByReceiverA)
+            assertNotNull(unwrappedGossipToReceiverAByReceiverA)
+            assertNull(unwrappedGossipToReceiverBByReceiverA)
+
+            val unwrappedGossipToSenderByReceiverB = unwrappedMsgForSenderBySender.unseal(receiverB.privKey!!)
+            val unwrappedGossipToReceiverAByReceiverB = unwrappedMsgForReceiverAByReceiverA.unseal(receiverB.privKey!!)
+            val unwrappedGossipToReceiverBByReceiverB = unwrappedMsgForReceiverBByReceiverB.unseal(receiverB.privKey!!)
+
+            assertNull(unwrappedGossipToSenderByReceiverB)
+            assertNull(unwrappedGossipToReceiverAByReceiverB)
+            assertNotNull(unwrappedGossipToReceiverBByReceiverB)
+
+            val unwrappedGossipToSenderBySender = unwrappedMsgForSenderBySender.unseal(sender.privKey!!)
+            val unwrappedGossipToReceiverABySender = unwrappedMsgForReceiverAByReceiverA.unseal(sender.privKey!!)
+            val unwrappedGossipToReceiverBBySender = unwrappedMsgForReceiverBByReceiverB.unseal(sender.privKey!!)
+
+            assertNotNull(unwrappedGossipToSenderBySender)
+            assertNull(unwrappedGossipToReceiverABySender)
+            assertNull(unwrappedGossipToReceiverBBySender)
+
+            assertEquals("Who is going to the party tonight?", unwrappedGossipToReceiverAByReceiverA?.content)
+            assertEquals("Who is going to the party tonight?", unwrappedGossipToReceiverBByReceiverB?.content)
+            assertEquals("Who is going to the party tonight?", unwrappedGossipToSenderBySender?.content)
+        } else {
+            fail()
+        }
+    }
+
+    @Test
+    fun testCaseFromAmethyst1() {
+        val json = """
+ {
+    "content":"{\"ciphertext\":\"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\",\"nonce\":\"6anNjUdNwW6MNfoKzRZcz1R09N1h8G4L\",\"v\":1}",
+    "created_at":1690660515,
+    "id":"d90739741c2f5a8c1a03aab5dc219c0b708ed6b0566044495731cd0307cf19a5",
+    "kind":1059,
+    "pubkey":"a79b7162f8ebb9c9f7aa65a48977ab7f32aa097520bc543e4d625812154ff6af",
+    "sig":"9b012504e779632a2a1f55562fa9a85f8ae6245cbc149b83d25b2971249053abc77f65cc068e5d025b871d743678265fede70de4eaf5af642e675a5b6210077d",
+    "tags":[
+       [
+          "p",
+          "c55f0b0cb4dd180dd4395867b28dd4c208b709144a69fb7c31a46c369a5ad1c6"
+       ]
+    ]
+ }
+        """.trimIndent()
+
+        val privateKey = "de6152a85a0dea3b09a08a6f8139a314d498a7b52f7e5c28858b64270abd4c70"
+        val gossip = unwrapUnsealGossip(json, privateKey)
+
+        assertNotNull(gossip)
+        assertEquals("Hola, que tal?", gossip?.content)
+    }
+
+    @Test
+    fun testCaseFromAmethyst2() {
+        val json = """
+{
+    "content":"{\"ciphertext\":\"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\",\"nonce\":\"/Q2UTTjVZthm/atcCuDjU1e4reF+ZSgZ\",\"v\":1}",
+    "created_at":1690660515,
+    "id":"087d9627d63135a5050758a69222e566c86702e930c9905f0b93ccd6bebeca3f",
+    "kind":1059,
+    "pubkey":"e59c00796ae2aa9077fc8bcd57fe8d32c0fc363f7c8b93d055c70804ffff3772",
+    "sig":"807cb641c314ca6910aaeefadcf87d859137520be1039eb40e39832ed59d456fdd800c5f88bba09e1b395ee90c66d5330847bdd010b63be9919bf091adbc2c2a",
+    "tags":[
+       [
+          "p",
+          "f85f315c06aaf19c2b30a96ca80d9644720655ee8d3ec43b84657a7c98f36a23"
+       ]
+    ]
+}
+        """.trimIndent()
+
+        val privateKey = "409ff7654141eaa16cd2161fe5bd127aeaef71f270c67587474b78998a8e3533"
+        val gossip = unwrapUnsealGossip(json, privateKey)
+
+        assertNotNull(gossip)
+        assertEquals("Hola, que tal?", gossip?.content)
+    }
+
+    @Test
+    fun testDecryptFromCoracle() {
+        val json = """
+{
+  "content": "{\"ciphertext\":\"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\",\"nonce\":\"Mv70S6jgrs4D1rlqV9b5DddiymGAcVVe\",\"v\":1}",
+  "created_at": 1690528373,
+  "id": "6b108e4236c3c338236ee589388ce0f91f921e1532ae52e75d1d2add6f8e691a",
+  "kind": 1059,
+  "pubkey": "627dc0248335e2bf9adac14be9494139ebbeb12c422d7df5b0e3cd72d04c209c",
+  "sig": "be11da487196db298e4ffb7a03e74176c37441c88b39c95b518fadce6fd02f23c58b2c435ca38c24d512713935ab719dae80bf952267630809e1f84be8e95174",
+  "tags": [
+    [
+      "p",
+      "e7764a227c12ac1ef2db79ae180392c90903b2cec1e37f5c1a4afed38117185e"
+    ]
+  ],
+  "seenOn": [
+    "wss://relay.damus.io/"
+  ]
+}
+        """.trimIndent()
+
+        val privateKey = "09e0051fdf5fdd9dd7a54713583006442cbdbf87bdcdab1a402f26e527d56771"
+        val gossip = unwrapUnsealGossip(json, privateKey)
+
+        assertNotNull(gossip)
+        assertEquals("test", gossip?.content)
+    }
+
+    @Test
+    fun testFromCoracle2() {
+        val json = """
+{
+  "content": "{\"ciphertext\":\"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\",\"nonce\":\"K537d+7m5tUcXZfkr3Qk2J2G86vdBMmY\",\"v\":1}",
+  "created_at": 1690655012,
+  "id": "c4f97c6332b0a63912c44c9e1f8c7b23581dc67a8489ec1522ec205fea7133db",
+  "kind": 1059,
+  "pubkey": "8def03a22b1039256a3883d46c7ccd5562f61743100db401344284547de7ec61",
+  "sig": "25dcf24bdda99c04abc72274d9f7a30538a4a00a70ac4b39db4082b73823979858df93cd649c25edfb759857eac46ed70bb9ad0598f2e011d733a5a382bc4def",
+  "tags": [
+    [
+      "p",
+      "e7764a227c12ac1ef2db79ae180392c90903b2cec1e37f5c1a4afed38117185e"
+    ]
+  ]
+}
+        """.trimIndent()
+
+        val privateKey = "09e0051fdf5fdd9dd7a54713583006442cbdbf87bdcdab1a402f26e527d56771"
+
+        val gossip = unwrapUnsealGossip(json, privateKey)
+
+        assertEquals("asdfasdfasdf", gossip?.content)
+        assertEquals(1690659269L, gossip?.createdAt)
+        assertEquals("827ba09d32ab81d62c60f657b350198c8aaba84372dab9ad3f4f6b8b7274b707", gossip?.id)
+        assertEquals(14, gossip?.kind)
+        assertEquals("subject", gossip?.tags?.firstOrNull()?.get(0))
+        assertEquals("test", gossip?.tags?.firstOrNull()?.get(1))
+    }
+
+    @Test
+    fun testFromCoracle3() {
+        val json = """
+{
+  "content": "{\"ciphertext\":\"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\",\"nonce\":\"OdCZczJiUGR4bOGIElQ4UUH4dQmG5U/3\",\"v\":1}",
+  "kind": 1059,
+  "created_at": 1690772945,
+  "pubkey": "e01475e87896800b7285eb0daf263c59f811c8fc5bc8daa105d2c98b6d7c4952",
+  "tags": [
+    [
+      "p",
+      "b08d8857a92b4d6aa580ff55cc3c18c4edf313c83388c34abc118621f74f1a78"
+    ]
+  ],
+  "id": "d9fc85ece892ce45ffa737b3ddc0f8b752623181d75363b966191f8c03d2debe",
+  "sig": "1b20416b83f4b5b8eead11e29c185f46b5e76d1960e4505210ddd00f7a6973cc11268f52a8989e3799b774d5f3a55db95bed4d66a1b6e88ab54becec5c771c17"
+}
+        """.trimIndent()
+
+        val privateKey = "7dd22cafc512c0bc363a259f6dcda515b13ae3351066d7976fd0bb79cbd0d700"
+
+        val gossip = unwrapUnsealGossip(json, privateKey)
+
+        assertEquals("8d1a56008d4e31dae2fb8bef36b3efea519eff75f57033107e2aa16702466ef2", gossip?.id)
+        assertEquals("Howdy", gossip?.content)
+        assertEquals(1690833960L, gossip?.createdAt)
+        assertEquals(14, gossip?.kind)
+        assertEquals("p", gossip?.tags?.firstOrNull()?.get(0))
+        assertEquals("b08d8857a92b4d6aa580ff55cc3c18c4edf313c83388c34abc118621f74f1a78", gossip?.tags?.firstOrNull()?.get(1))
+        assertEquals("subject", gossip?.tags?.getOrNull(1)?.get(0))
+        assertEquals("Stuff", gossip?.tags?.getOrNull(1)?.get(1))
+    }
+
+    fun unwrapUnsealGossip(json: String, privateKey: HexKey): Gossip? {
+        val pkBytes = privateKey.hexToByteArray()
+
+        val wrap = Event.fromJson(json, Client.lenient) as GiftWrapEvent
+        wrap.checkSignature()
+
+        assertEquals(CryptoUtils.pubkeyCreate(pkBytes).toHexKey(), wrap.recipientPubKey())
+
+        val event = wrap.unwrap(pkBytes)
+        assertNotNull(event)
+
+        return if (event is SealedGossipEvent) {
+            return event.unseal(pkBytes)
+        } else {
+            println(event?.toJson())
+            fail("Event is not a Sealed Gossip")
+            null
+        }
+    }
+}

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/androidTestPlay/java/com/vitorpamplona/amethyst/TranslationsTest.kt

@@ -11,17 +11,17 @@ import org.junit.runner.RunWith
 @RunWith(AndroidJUnit4::class)
 class TranslationsTest {
 
-    fun translatePT(text: String, translateTo: String): String? {
+    fun translateTo(text: String, translateTo: String): String? {
         val task = LanguageTranslatorService.autoTranslate(text, emptySet(), translateTo)
         return Tasks.await(task).result
     }
 
     fun assertTranslate(expected: String, input: String, translateTo: String) {
-        assertEquals(null, expected, translatePT(input, translateTo))
+        assertEquals(null, expected, translateTo(input, translateTo))
     }
 
     fun assertTranslateContains(expected: String, input: String, translateTo: String) {
-        val translated = translatePT(input, translateTo)!!
+        val translated = translateTo(input, translateTo)!!
         assertTrue("'$translated' does not contain '$expected'", translated.contains(expected))
     }
 
@@ -86,4 +86,26 @@ class TranslationsTest {
             "en"
         )
     }
+
+    @Test
+    fun testJapaneseTranslationsOfUrl() {
+        assertTranslateContains(
+            "https://youtu.be/wMYFmCDy_Eg",
+            "うちの会社の小さい先輩の話 第1話「うちの会社の先輩は小さくて可愛い」\n" +
+                "\n" +
+                "https://youtu.be/wMYFmCDy_Eg\n" +
+                "\n" +
+                "先輩がうざい後輩の話と似たような話かと思ったけど、もっとオタクの妄想あるある的なものを詰め込んだやつだ。ワードとかシチュエーションとか、ヒロインのサイズ感とか。知らんけど",
+            "en"
+        )
+    }
+
+    @Test
+    fun testEmoji() {
+        assertTranslateContains(
+            "https://cdn.nostr.build/i/df3783dcdf7dd289ba02ba538dc039c8fe1d4db055e580b81604ed88c6af4ee0.jpg",
+            "\uD83E\uDD23 https://cdn.nostr.build/i/df3783dcdf7dd289ba02ba538dc039c8fe1d4db055e580b81604ed88c6af4ee0.jpg ",
+            "pt"
+        )
+    }
 }

app/src/main/AndroidManifest.xml

@@ -27,6 +27,19 @@
     <!-- 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" />
+
+    <!-- This notification permission is needed for some phones -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+
+    <!-- Adds Geohash to posts if active -->
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+
     <!-- Old permission to access media -->
     <uses-permission
         android:name="android.permission.WRITE_EXTERNAL_STORAGE"
@@ -51,6 +64,7 @@
         <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 +105,17 @@
             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 +1,38 @@
 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() {
+    @androidx.annotation.OptIn(androidx.media3.common.util.UnstableApi::class)
     override fun onCreate() {
         super.onCreate()
         instance = this
+
+        VideoCache.initFileCache(instance)
+
+        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

@@ -7,21 +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
 
@@ -43,6 +46,7 @@ private object PrefKeys {
     const val NOSTR_PRIVKEY = "nostr_privkey"
     const val NOSTR_PUBKEY = "nostr_pubkey"
     const val FOLLOWING_CHANNELS = "following_channels"
+    const val FOLLOWING_COMMUNITIES = "following_communities"
     const val HIDDEN_USERS = "hidden_users"
     const val RELAYS = "relays"
     const val DONT_TRANSLATE_FROM = "dontTranslateFrom"
@@ -55,6 +59,7 @@ private object PrefKeys {
     const val DEFAULT_HOME_FOLLOW_LIST = "defaultHomeFollowList"
     const val DEFAULT_STORIES_FOLLOW_LIST = "defaultStoriesFollowList"
     const val DEFAULT_NOTIFICATION_FOLLOW_LIST = "defaultNotificationFollowList"
+    const val DEFAULT_DISCOVERY_FOLLOW_LIST = "defaultDiscoveryFollowList"
     const val ZAP_PAYMENT_REQUEST_SERVER = "zapPaymentServer"
     const val LATEST_CONTACT_LIST = "latestContactList"
     const val HIDE_DELETE_REQUEST_DIALOG = "hide_delete_request_dialog"
@@ -65,6 +70,11 @@ private object PrefKeys {
     const val WARN_ABOUT_REPORTS = "warn_about_reports"
     const val FILTER_SPAM_FROM_STRANGERS = "filter_spam_from_strangers"
     const val LAST_READ_PER_ROUTE = "last_read_route_per_route"
+    const val AUTOMATICALLY_SHOW_IMAGES = "automatically_show_images"
+    const val AUTOMATICALLY_START_PLAYBACK = "automatically_start_playback"
+    const val THEME = "theme"
+    const val PREFERRED_LANGUAGE = "preferred_Language"
+    const val AUTOMATICALLY_LOAD_URL_PREVIEW = "automatically_load_url_preview"
     val LAST_READ: (String) -> String = { route -> "last_read_route_$route" }
 }
 
@@ -201,9 +211,10 @@ 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)
             putString(PrefKeys.RELAYS, gson.toJson(account.localRelays))
             putStringSet(PrefKeys.DONT_TRANSLATE_FROM, account.dontTranslateFrom)
@@ -216,6 +227,7 @@ object LocalPreferences {
             putString(PrefKeys.DEFAULT_HOME_FOLLOW_LIST, account.defaultHomeFollowList)
             putString(PrefKeys.DEFAULT_STORIES_FOLLOW_LIST, account.defaultStoriesFollowList)
             putString(PrefKeys.DEFAULT_NOTIFICATION_FOLLOW_LIST, account.defaultNotificationFollowList)
+            putString(PrefKeys.DEFAULT_DISCOVERY_FOLLOW_LIST, account.defaultDiscoveryFollowList)
             putString(PrefKeys.ZAP_PAYMENT_REQUEST_SERVER, gson.toJson(account.zapPaymentRequest))
             putString(PrefKeys.LATEST_CONTACT_LIST, Event.gson.toJson(account.backupContactList))
             putBoolean(PrefKeys.HIDE_DELETE_REQUEST_DIALOG, account.hideDeleteRequestDialog)
@@ -232,6 +244,47 @@ object LocalPreferences {
                 putBoolean(PrefKeys.SHOW_SENSITIVE_CONTENT, account.showSensitiveContent!!)
             }
         }.apply()
+
+        val globalPrefs = encryptedPreferences()
+        globalPrefs.edit().apply {
+            if (account.settings.automaticallyShowImages.prefCode == null) {
+                remove(PrefKeys.AUTOMATICALLY_SHOW_IMAGES)
+            } else {
+                putBoolean(PrefKeys.AUTOMATICALLY_SHOW_IMAGES, account.settings.automaticallyShowImages.prefCode!!)
+            }
+
+            if (account.settings.automaticallyStartPlayback.prefCode == null) {
+                remove(PrefKeys.AUTOMATICALLY_START_PLAYBACK)
+            } else {
+                putBoolean(PrefKeys.AUTOMATICALLY_START_PLAYBACK, account.settings.automaticallyStartPlayback.prefCode!!)
+            }
+            if (account.settings.automaticallyShowUrlPreview.prefCode == null) {
+                remove(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW)
+            } else {
+                putBoolean(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW, account.settings.automaticallyShowUrlPreview.prefCode!!)
+            }
+            putString(PrefKeys.PREFERRED_LANGUAGE, account.settings.preferredLanguage ?: "")
+        }.apply()
+    }
+
+    fun updateTheme(theme: Int) {
+        encryptedPreferences().edit().apply {
+            putInt(PrefKeys.THEME, theme)
+        }.apply()
+    }
+
+    fun getTheme(): Int {
+        encryptedPreferences().apply {
+            return getInt(PrefKeys.THEME, 0)
+        }
+    }
+
+    fun getPreferredLanguage(): String {
+        var language = ""
+        encryptedPreferences().apply {
+            language = getString(PrefKeys.PREFERRED_LANGUAGE, "") ?: ""
+        }
+        return language
     }
 
     fun loadFromEncryptedStorage(): Account? {
@@ -245,6 +298,7 @@ object LocalPreferences {
             val pubKey = getString(PrefKeys.NOSTR_PUBKEY, null) ?: return null
             val privKey = getString(PrefKeys.NOSTR_PRIVKEY, null)
             val followingChannels = getStringSet(PrefKeys.FOLLOWING_CHANNELS, null) ?: setOf()
+            val followingCommunities = getStringSet(PrefKeys.FOLLOWING_COMMUNITIES, null) ?: setOf()
             val hiddenUsers = getStringSet(PrefKeys.HIDDEN_USERS, emptySet()) ?: setOf()
             val localRelays = gson.fromJson(
                 getString(PrefKeys.RELAYS, "[]"),
@@ -256,6 +310,7 @@ object LocalPreferences {
             val defaultHomeFollowList = getString(PrefKeys.DEFAULT_HOME_FOLLOW_LIST, null) ?: KIND3_FOLLOWS
             val defaultStoriesFollowList = getString(PrefKeys.DEFAULT_STORIES_FOLLOW_LIST, null) ?: GLOBAL_FOLLOWS
             val defaultNotificationFollowList = getString(PrefKeys.DEFAULT_NOTIFICATION_FOLLOW_LIST, null) ?: GLOBAL_FOLLOWS
+            val defaultDiscoveryFollowList = getString(PrefKeys.DEFAULT_DISCOVERY_FOLLOW_LIST, null) ?: GLOBAL_FOLLOWS
 
             val zapAmountChoices = gson.fromJson(
                 getString(PrefKeys.ZAP_AMOUNTS, "[]"),
@@ -334,9 +389,32 @@ object LocalPreferences {
                 mapOf()
             }
 
+            val settings = Settings()
+            encryptedPreferences().apply {
+                settings.automaticallyShowImages = if (contains(PrefKeys.AUTOMATICALLY_SHOW_IMAGES)) {
+                    parseConnectivityType(getBoolean(PrefKeys.AUTOMATICALLY_SHOW_IMAGES, false))
+                } else {
+                    ConnectivityType.ALWAYS
+                }
+
+                settings.automaticallyStartPlayback = if (contains(PrefKeys.AUTOMATICALLY_START_PLAYBACK)) {
+                    parseConnectivityType(getBoolean(PrefKeys.AUTOMATICALLY_START_PLAYBACK, false))
+                } else {
+                    ConnectivityType.ALWAYS
+                }
+                settings.automaticallyShowUrlPreview = if (contains(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW)) {
+                    parseConnectivityType(getBoolean(PrefKeys.AUTOMATICALLY_LOAD_URL_PREVIEW, false))
+                } else {
+                    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,
                 localRelays = localRelays,
                 dontTranslateFrom = dontTranslateFrom,
@@ -349,6 +427,7 @@ object LocalPreferences {
                 defaultHomeFollowList = defaultHomeFollowList,
                 defaultStoriesFollowList = defaultStoriesFollowList,
                 defaultNotificationFollowList = defaultNotificationFollowList,
+                defaultDiscoveryFollowList = defaultDiscoveryFollowList,
                 zapPaymentRequest = zapPaymentRequestServer,
                 hideDeleteRequestDialog = hideDeleteRequestDialog,
                 hideBlockAlertDialog = hideBlockAlertDialog,
@@ -358,7 +437,8 @@ object LocalPreferences {
                 showSensitiveContent = showSensitiveContent,
                 warnAboutPostsWithReports = warnAboutReports,
                 filterSpamFromStrangers = filterSpam,
-                lastReadPerRoute = lastReadPerRoute
+                lastReadPerRoute = lastReadPerRoute,
+                settings = settings
             )
 
             return a

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 +1,48 @@
+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(
+                {
+                    try {
+                        onReady(controllerFuture.get())
+                    } catch (e: Exception) {
+                        Log.e("Playback Client", "Failed to load Playback Client for $videoUri", e)
+                    }
+                },
+                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 +1,123 @@
+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.MediaSession
+import androidx.media3.session.MediaSessionService
+import com.vitorpamplona.amethyst.service.HttpClient
+
+@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(Amethyst.instance, HttpClient.getHttpClient()))
+    }
+
+    // Create your Player and MediaSession in the onCreate lifecycle event
+    @OptIn(UnstableApi::class)
+    override fun onCreate() {
+        super.onCreate()
+
+        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(this@PlaybackService::onProxyUpdated)
+    }
+
+    private fun onProxyUpdated() {
+        val toDestroyHls = managerHls
+        val toDestroyProgressive = managerProgressive
+
+        managerHls = MultiPlayerPlaybackManager(newHslDataSource(), videoViewedPositionCache)
+        managerProgressive = MultiPlayerPlaybackManager(newProgressiveDataSource(), videoViewedPositionCache)
+
+        toDestroyHls?.releaseAppPlayers()
+        toDestroyProgressive?.releaseAppPlayers()
+    }
+
+    override fun onDestroy() {
+        HttpClient.proxyChangeListeners.remove(this@PlaybackService::onProxyUpdated)
+
+        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

@@ -13,9 +13,14 @@ import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.service.HttpClient
 import com.vitorpamplona.amethyst.service.NostrAccountDataSource
 import com.vitorpamplona.amethyst.service.NostrChannelDataSource
+import com.vitorpamplona.amethyst.service.NostrChatroomDataSource
 import com.vitorpamplona.amethyst.service.NostrChatroomListDataSource
-import com.vitorpamplona.amethyst.service.NostrGlobalDataSource
+import com.vitorpamplona.amethyst.service.NostrCommunityDataSource
+import com.vitorpamplona.amethyst.service.NostrDiscoveryDataSource
+import com.vitorpamplona.amethyst.service.NostrGeohashDataSource
+import com.vitorpamplona.amethyst.service.NostrHashtagDataSource
 import com.vitorpamplona.amethyst.service.NostrHomeDataSource
+import com.vitorpamplona.amethyst.service.NostrSearchEventOrUserDataSource
 import com.vitorpamplona.amethyst.service.NostrSingleChannelDataSource
 import com.vitorpamplona.amethyst.service.NostrSingleEventDataSource
 import com.vitorpamplona.amethyst.service.NostrSingleUserDataSource
@@ -56,9 +61,6 @@ object ServiceManager {
                 .build()
         }
 
-        // Initializes video cache.
-        VideoCache.init(context.applicationContext)
-
         if (myAccount != null) {
             Client.connect(myAccount.activeRelays() ?: myAccount.convertLocalRelays())
 
@@ -67,12 +69,15 @@ object ServiceManager {
             NostrHomeDataSource.account = myAccount
             NostrChatroomListDataSource.account = myAccount
             NostrVideoDataSource.account = myAccount
+            NostrDiscoveryDataSource.account = myAccount
             ImageUploader.account = myAccount
 
             // Notification Elements
             NostrHomeDataSource.start()
             NostrAccountDataSource.start()
             NostrChatroomListDataSource.start()
+            NostrDiscoveryDataSource.start()
+            NostrVideoDataSource.start()
 
             // More Info Data Sources
             NostrSingleEventDataSource.start()
@@ -87,9 +92,14 @@ object ServiceManager {
         NostrAccountDataSource.stop()
         NostrHomeDataSource.stop()
         NostrChannelDataSource.stop()
+        NostrChatroomDataSource.stop()
         NostrChatroomListDataSource.stop()
+        NostrDiscoveryDataSource.stop()
 
-        NostrGlobalDataSource.stop()
+        NostrCommunityDataSource.stop()
+        NostrHashtagDataSource.stop()
+        NostrGeohashDataSource.stop()
+        NostrSearchEventOrUserDataSource.stop()
         NostrSingleChannelDataSource.stop()
         NostrSingleEventDataSource.stop()
         NostrSingleUserDataSource.stop()
@@ -107,7 +117,7 @@ object ServiceManager {
             LocalCache.pruneOldAndHiddenMessages(it)
             LocalCache.pruneHiddenMessages(it)
             LocalCache.pruneContactLists(it)
-            // LocalCache.pruneNonFollows(it)
+            LocalCache.pruneRepliesAndReactions(it)
         }
     }
 }

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)
+    fun initFileCache(context: Context) {
+        exoDatabaseProvider = StandaloneDatabaseProvider(context)
 
-            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)
-        }
+        simpleCache = SimpleCache(
+            context.cacheDir,
+            leastRecentlyUsedCacheEvictor,
+            exoDatabaseProvider
+        )
     }
 
-    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) {
+            initFileCache(context)
+        }
+
+        // Renews the factory because OkHttpMight have changed.
+        renewCacheFactory(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/AntiSpamFilter.kt

@@ -18,7 +18,6 @@ class AntiSpamFilter {
     val recentMessages = LruCache<Int, String>(1000)
     val spamMessages = LruCache<Int, Spammer>(1000)
 
-    @Synchronized
     fun isSpam(event: Event, relay: Relay?): Boolean {
         checkNotInMainThread()
 
@@ -45,15 +44,9 @@ class AntiSpamFilter {
             Log.w("Potential SPAM Message", "${event.id} ${recentMessages[hash]} ${spamMessages[hash] != null} ${relay?.url} ${event.content.replace("\n", " | ")}")
 
             // Log down offenders
-            if (spamMessages.get(hash) == null) {
-                spamMessages.put(hash, Spammer(event.pubKey, setOf(recentMessages[hash], event.id)))
-                liveSpam.invalidateData()
-            } else {
-                val spammer = spamMessages.get(hash)
-                spammer.duplicatedMessages = spammer.duplicatedMessages + event.id
+            logOffender(hash, event)
 
-                liveSpam.invalidateData()
-            }
+            liveSpam.invalidateData()
 
             return true
         }
@@ -63,6 +56,16 @@ class AntiSpamFilter {
         return false
     }
 
+    @Synchronized
+    private fun logOffender(hashCode: Int, event: Event) {
+        if (spamMessages.get(hashCode) == null) {
+            spamMessages.put(hashCode, Spammer(event.pubKey, setOf(recentMessages[hashCode], event.id)))
+        } else {
+            val spammer = spamMessages.get(hashCode)
+            spammer.duplicatedMessages = spammer.duplicatedMessages + event.id
+        }
+    }
+
     val liveSpam: AntiSpamLiveData = AntiSpamLiveData(this)
 }
 
@@ -73,7 +76,11 @@ class AntiSpamLiveData(val cache: AntiSpamFilter) : LiveData<AntiSpamState>(Anti
     private val bundler = BundledUpdate(300, Dispatchers.IO)
 
     fun invalidateData() {
+        checkNotInMainThread()
+
         bundler.invalidate() {
+            checkNotInMainThread()
+
             if (hasActiveObservers()) {
                 postValue(AntiSpamState(cache))
             }

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

@@ -3,9 +3,11 @@ package com.vitorpamplona.amethyst.model
 import androidx.compose.runtime.Stable
 import androidx.lifecycle.LiveData
 import com.vitorpamplona.amethyst.service.NostrSingleChannelDataSource
+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
@@ -33,7 +35,7 @@ class PublicChatChannel(idHex: String) : Channel(idHex) {
     }
 
     override fun profilePicture(): String? {
-        if (info.picture.isNullOrBlank()) return null
+        if (info.picture.isNullOrBlank()) return super.profilePicture()
         return info.picture ?: super.profilePicture()
     }
 
@@ -65,7 +67,7 @@ class LiveActivitiesChannel(val address: ATag) : Channel(address.toTag()) {
     }
 
     override fun profilePicture(): String? {
-        return info?.image()?.ifBlank { null } ?: super.profilePicture()
+        return info?.image()?.ifBlank { null }
     }
 
     override fun anyNameStartsWith(prefix: String): Boolean {
@@ -94,6 +96,10 @@ abstract class Channel(val idHex: String) {
         return null
     }
 
+    open fun creatorName(): String? {
+        return creator?.toBestDisplayName()
+    }
+
     open fun profilePicture(): String? {
         return creator?.profilePicture()
     }
@@ -145,7 +151,10 @@ class ChannelLiveData(val channel: Channel) : LiveData<ChannelState>(ChannelStat
     private val bundler = BundledUpdate(300, Dispatchers.IO)
 
     fun invalidateData() {
+        checkNotInMainThread()
+
         bundler.invalidate() {
+            checkNotInMainThread()
             if (hasActiveObservers()) {
                 postValue(ChannelState(channel))
             }

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

@@ -1,26 +1,31 @@
 package com.vitorpamplona.amethyst.model
 import androidx.compose.foundation.layout.padding
+import androidx.compose.runtime.Immutable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.R
-fun checkForHashtagWithIcon(tag: String): HashtagIcon? {
+fun checkForHashtagWithIcon(tag: String, primary: Color): HashtagIcon? {
     return when (tag.lowercase()) {
-        "bitcoin", "btc", "timechain" -> HashtagIcon(R.drawable.ht_btc, "Bitcoin", Color.Unspecified, Modifier.padding(2.dp, 2.dp, 0.dp, 0.dp))
+        "bitcoin", "btc", "timechain", "bitcoiner", "bitcoiners" -> HashtagIcon(R.drawable.ht_btc, "Bitcoin", Color.Unspecified, Modifier.padding(2.dp, 2.dp, 0.dp, 0.dp))
         "nostr", "nostrich", "nostriches" -> HashtagIcon(R.drawable.ht_nostr, "Nostr", Color.Unspecified, Modifier.padding(1.dp, 2.dp, 0.dp, 0.dp))
         "lightning", "lightningnetwork" -> HashtagIcon(R.drawable.ht_lightning, "Lightning", Color.Unspecified, Modifier.padding(1.dp, 3.dp, 0.dp, 0.dp))
         "zap", "zaps", "zapper", "zappers", "zapping", "zapped", "zapathon", "zapraiser", "zaplife", "zapchain" -> HashtagIcon(R.drawable.zap, "Zap", Color.Unspecified, Modifier.padding(1.dp, 3.dp, 0.dp, 0.dp))
         "amethyst" -> HashtagIcon(R.drawable.amethyst, "Amethyst", Color.Unspecified, Modifier.padding(3.dp, 2.dp, 0.dp, 0.dp))
         "onyx" -> HashtagIcon(R.drawable.black_heart, "Onyx", Color.Unspecified, Modifier.padding(1.dp, 3.dp, 0.dp, 0.dp))
+        "cashu", "ecash", "nut", "nuts", "deeznuts" -> HashtagIcon(R.drawable.cashu, "Cashu", Color.Unspecified, Modifier.padding(1.dp, 3.dp, 0.dp, 0.dp))
         "plebs", "pleb", "plebchain" -> HashtagIcon(R.drawable.plebs, "Pleb", Color.Unspecified, Modifier.padding(2.dp, 2.dp, 0.dp, 1.dp))
         "coffee", "coffeechain", "cafe" -> HashtagIcon(R.drawable.coffee, "Coffee", Color.Unspecified, Modifier.padding(2.dp, 2.dp, 0.dp, 0.dp))
         "skullofsatoshi" -> HashtagIcon(R.drawable.skull, "SkullofSatoshi", Color.Unspecified, Modifier.padding(2.dp, 1.dp, 0.dp, 0.dp))
         "grownostr", "gardening", "garden" -> HashtagIcon(R.drawable.grownostr, "GrowNostr", Color.Unspecified, Modifier.padding(0.dp, 1.dp, 0.dp, 1.dp))
         "footstr" -> HashtagIcon(R.drawable.footstr, "Footstr", Color.Unspecified, Modifier.padding(1.dp, 1.dp, 0.dp, 0.dp))
+        "tunestr", "music", "nowplaying" -> HashtagIcon(R.drawable.tunestr, "Tunestr", primary, Modifier.padding(0.dp, 3.dp, 0.dp, 1.dp))
         "weed", "weedstr", "420", "cannabis", "marijuana" -> HashtagIcon(R.drawable.weed, "Weed", Color.Unspecified, Modifier.padding(0.dp, 0.dp, 0.dp, 0.dp))
         else -> null
     }
 }
+
+@Immutable
 class HashtagIcon(
     val icon: Int,
     val description: String,

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

@@ -3,9 +3,9 @@ package com.vitorpamplona.amethyst.model
 import android.util.Log
 import androidx.compose.runtime.Stable
 import com.vitorpamplona.amethyst.Amethyst
+import com.vitorpamplona.amethyst.service.HexValidator
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.model.*
-import com.vitorpamplona.amethyst.service.model.ATag.Companion.isATag
 import com.vitorpamplona.amethyst.service.nip19.Nip19
 import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.ui.components.BundledInsert
@@ -13,7 +13,6 @@ import fr.acinq.secp256k1.Hex
 import kotlinx.coroutines.*
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.asSharedFlow
-import nostr.postr.toNpub
 import java.io.File
 import java.io.FileOutputStream
 import java.io.IOException
@@ -34,27 +33,30 @@ object LocalCache {
         ConcurrentHashMap<HexKey, Pair<Note?, (LnZapPaymentResponseEvent) -> Unit>>(10)
 
     fun checkGetOrCreateUser(key: String): User? {
-        checkNotInMainThread()
+        // checkNotInMainThread()
 
-        if (isValidHexNpub(key)) {
+        if (isValidHex(key)) {
             return getOrCreateUser(key)
         }
         return null
     }
 
-    @Synchronized
     fun getOrCreateUser(key: HexKey): User {
         // checkNotInMainThread()
 
         return users[key] ?: run {
-            val answer = User(key)
-            users.put(key, answer)
-            answer
+            val newObject = User(key)
+            users.putIfAbsent(key, newObject) ?: newObject
         }
     }
 
     fun getUserIfExists(key: String): User? {
-        return users[key]
+        if (key.isEmpty()) return null
+        return users.get(key)
+    }
+
+    fun getAddressableNoteIfExists(key: String): AddressableNote? {
+        return addressables[key]
     }
 
     fun getNoteIfExists(key: String): Note? {
@@ -71,34 +73,32 @@ object LocalCache {
         if (ATag.isATag(key)) {
             return checkGetOrCreateAddressableNote(key)
         }
-        if (isValidHexNpub(key)) {
+        if (isValidHex(key)) {
             val note = getOrCreateNote(key)
             val noteEvent = note.event
-            if (noteEvent is AddressableEvent) {
+            return if (noteEvent is AddressableEvent) {
                 // upgrade to the latest
-                return checkGetOrCreateAddressableNote(noteEvent.address().toTag())
+                checkGetOrCreateAddressableNote(noteEvent.address().toTag())
             } else {
-                return note
+                note
             }
         }
         return null
     }
 
-    @Synchronized
     fun getOrCreateNote(idHex: String): Note {
         checkNotInMainThread()
 
-        return notes[idHex] ?: run {
-            val answer = Note(idHex)
-            notes.put(idHex, answer)
-            answer
+        return notes.get(idHex) ?: run {
+            val newObject = Note(idHex)
+            notes.putIfAbsent(idHex, newObject) ?: newObject
         }
     }
 
     fun checkGetOrCreateChannel(key: String): Channel? {
         checkNotInMainThread()
 
-        if (isValidHexNpub(key)) {
+        if (isValidHex(key)) {
             return getOrCreateChannel(key) {
                 PublicChatChannel(key)
             }
@@ -112,26 +112,19 @@ object LocalCache {
         return null
     }
 
-    private fun isValidHexNpub(key: String): Boolean {
+    private fun isValidHex(key: String): Boolean {
+        if (key.isBlank()) return false
         if (key.contains(":")) return false
 
-        return try {
-            Hex.decode(key).toNpub()
-            true
-        } catch (e: IllegalArgumentException) {
-            Log.e("LocalCache", "Invalid Key to create user: $key", e)
-            false
-        }
+        return HexValidator.isHex(key)
     }
 
-    @Synchronized
     fun getOrCreateChannel(key: String, channelFactory: (String) -> Channel): Channel {
         checkNotInMainThread()
 
         return channels[key] ?: run {
-            val answer = channelFactory(key)
-            channels.put(key, answer)
-            answer
+            val newObject = channelFactory(key)
+            channels.putIfAbsent(key, newObject) ?: newObject
         }
     }
 
@@ -149,16 +142,14 @@ object LocalCache {
         }
     }
 
-    @Synchronized
     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.
         return addressables[key.toTag()] ?: run {
-            val answer = AddressableNote(key)
-            addressables.put(key.toTag(), answer)
-            answer
+            val newObject = AddressableNote(key)
+            addressables.putIfAbsent(key.toTag(), newObject) ?: newObject
         }
     }
 
@@ -185,6 +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) {
@@ -245,10 +246,7 @@ object LocalCache {
 
         note.loadEvent(event, author, replyTo)
 
-        // Log.d("TN", "New Note (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${note.event?.content()?.take(100)} ${formattedDateTime(event.createdAt)}")
-
-        // Prepares user's profile view.
-        author.addNote(note)
+        // Log.d("TN", "New Note (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${note.event?.content()?.split("\n")?.take(100)} ${formattedDateTime(event.createdAt)}")
 
         // Counts the replies
         replyTo.forEach {
@@ -288,8 +286,6 @@ object LocalCache {
         if (event.createdAt > (note.createdAt() ?: 0)) {
             note.loadEvent(event, author, replyTo)
 
-            author.addNote(note)
-
             refreshObservers(note)
         }
     }
@@ -317,10 +313,7 @@ object LocalCache {
 
         note.loadEvent(event, author, replyTo)
 
-        // Log.d("TN", "New Note (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${note.event?.content()?.take(100)} ${formattedDateTime(event.createdAt)}")
-
-        // Prepares user's profile view.
-        author.addNote(note)
+        // Log.d("TN", "New Note (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${note.event?.content()?.split("\n")?.take(100)} ${formattedDateTime(event.createdAt)}")
 
         // Counts the replies
         replyTo.forEach {
@@ -330,6 +323,25 @@ object LocalCache {
         refreshObservers(note)
     }
 
+    private fun consume(event: CommunityDefinitionEvent, relay: Relay?) {
+        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)
+        }
+
+        if (note.event?.id() == event.id()) return
+
+        if (event.createdAt > (note.createdAt() ?: 0)) {
+            note.loadEvent(event, author, emptyList())
+
+            refreshObservers(note)
+        }
+    }
+
     private fun consume(event: LiveActivitiesEvent, relay: Relay?) {
         val version = getOrCreateNote(event.id)
         val note = getOrCreateAddressableNote(event.address())
@@ -354,6 +366,63 @@ object LocalCache {
         }
     }
 
+    fun consume(event: EmojiPackSelectionEvent) {
+        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)
+        }
+
+        if (note.event?.id() == event.id()) return
+
+        if (event.createdAt > (note.createdAt() ?: 0)) {
+            note.loadEvent(event, author, emptyList())
+
+            refreshObservers(note)
+        }
+    }
+
+    private fun consume(event: EmojiPackEvent) {
+        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)
+        }
+
+        if (note.event?.id() == event.id()) return
+
+        if (event.createdAt > (note.createdAt() ?: 0)) {
+            note.loadEvent(event, author, emptyList())
+
+            refreshObservers(note)
+        }
+    }
+
+    private fun consume(event: ClassifiedsEvent) {
+        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)
+        }
+
+        if (note.event?.id() == event.id()) return
+
+        if (event.createdAt > (note.createdAt() ?: 0)) {
+            note.loadEvent(event, author, emptyList())
+
+            refreshObservers(note)
+        }
+    }
+
     private fun consume(event: PinListEvent) {
         val version = getOrCreateNote(event.id)
         val note = getOrCreateAddressableNote(event.address())
@@ -451,7 +520,7 @@ object LocalCache {
         if (event.createdAt > (note.createdAt() ?: 0)) {
             note.loadEvent(event, author, replyTo)
 
-            author.updateAcceptedBadges(note)
+            refreshObservers(note)
         }
     }
 
@@ -476,6 +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())
@@ -487,7 +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())
@@ -521,16 +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)
@@ -547,8 +626,7 @@ object LocalCache {
 
         // Log.d("PM", "${author.toBestDisplayName()} to ${recipient?.toBestDisplayName()}")
 
-        val repliesTo = event.tags.filter { it.firstOrNull() == "e" }.mapNotNull { it.getOrNull(1) }
-            .mapNotNull { checkGetOrCreateNote(it) }
+        val repliesTo = event.taggedEvents().mapNotNull { checkGetOrCreateNote(it) }
 
         note.loadEvent(event, author, repliesTo)
 
@@ -568,8 +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) }
@@ -631,9 +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)
@@ -656,8 +729,30 @@ object LocalCache {
 
         note.loadEvent(event, author, repliesTo)
 
-        // Prepares user's profile view.
-        author.addNote(note)
+        // Counts the replies
+        repliesTo.forEach {
+            it.addBoost(note)
+        }
+
+        refreshObservers(note)
+    }
+
+    fun consume(event: CommunityPostApprovalEvent) {
+        val note = getOrCreateNote(event.id)
+
+        // Already processed this event.
+        if (note.event != null) return
+
+        // Log.d("TN", "New Boost (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${formattedDateTime(event.createdAt)}")
+
+        val author = getOrCreateUser(event.pubKey)
+
+        val communities = event.communities()
+        val eventsApproved = event.approvedEvents().mapNotNull { checkGetOrCreateNote(it) }
+
+        val repliesTo = communities.map { getOrCreateAddressableNote(it) }
+
+        note.loadEvent(event, author, eventsApproved)
 
         // Counts the replies
         repliesTo.forEach {
@@ -812,7 +907,7 @@ object LocalCache {
 
         note.loadEvent(event, author, replyTo)
 
-        // Log.d("CM", "New Note (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${note.event?.content()} ${formattedDateTime(event.createdAt)}")
+        // Log.d("CM", "New Chat Note (${note.author?.toBestDisplayName()} ${note.event?.content()} ${formattedDateTime(event.createdAt)}")
 
         // Counts the replies
         replyTo.forEach {
@@ -978,9 +1073,6 @@ object LocalCache {
 
         note.loadEvent(event, author, emptyList())
 
-        // Adds to user profile
-        author.addNote(note)
-
         refreshObservers(note)
     }
 
@@ -1018,6 +1110,57 @@ object LocalCache {
         refreshObservers(note)
     }
 
+    private fun consume(event: ChatMessageEvent, relay: Relay?) {
+        val note = getOrCreateNote(event.id)
+        val author = getOrCreateUser(event.pubKey)
+
+        if (relay != null) {
+            author.addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
+        // Already processed this event.
+        if (note.event != null) return
+
+        note.loadEvent(event, author, emptyList())
+
+        refreshObservers(note)
+    }
+
+    private fun consume(event: SealedGossipEvent, relay: Relay?) {
+        val note = getOrCreateNote(event.id)
+        val author = getOrCreateUser(event.pubKey)
+
+        if (relay != null) {
+            author.addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
+        // Already processed this event.
+        if (note.event != null) return
+
+        note.loadEvent(event, author, emptyList())
+
+        refreshObservers(note)
+    }
+
+    private fun consume(event: GiftWrapEvent, relay: Relay?) {
+        val note = getOrCreateNote(event.id)
+        val author = getOrCreateUser(event.pubKey)
+
+        if (relay != null) {
+            author.addRelayBeingUsed(relay, event.createdAt)
+            note.addRelay(relay)
+        }
+
+        // Already processed this event.
+        if (note.event != null) return
+
+        note.loadEvent(event, author, emptyList())
+
+        refreshObservers(note)
+    }
+
     fun consume(event: LnZapPaymentRequestEvent) {
         // Does nothing without a response callback.
     }
@@ -1093,15 +1236,13 @@ object LocalCache {
         }
 
         return notes.values.filter {
-            (it.event is TextNoteEvent && it.event?.content()?.contains(text, true) ?: false) ||
-                (it.event is PollNoteEvent && it.event?.content()?.contains(text, true) ?: false) ||
-                (it.event is ChannelMessageEvent && it.event?.content()?.contains(text, true) ?: false) ||
+            it.event?.content()?.contains(text, true) ?: false ||
+                it.event?.matchTag1With(text) ?: false ||
                 it.idHex.startsWith(text, true) ||
                 it.idNote().startsWith(text, true)
         } + addressables.values.filter {
-            (it.event as? LongTextNoteEvent)?.content?.contains(text, true) ?: false ||
-                (it.event as? LongTextNoteEvent)?.title()?.contains(text, true) ?: false ||
-                (it.event as? LongTextNoteEvent)?.summary()?.contains(text, true) ?: false ||
+            it.event?.content()?.contains(text, true) ?: false ||
+                it.event?.matchTag1With(text) ?: false ||
                 it.idHex.startsWith(text, true)
         }
     }
@@ -1131,6 +1272,10 @@ object LocalCache {
             it.value.clearLive()
         }
 
+        addressables.forEach {
+            it.value.clearLive()
+        }
+
         users.forEach {
             it.value.clearLive()
         }
@@ -1142,6 +1287,8 @@ object LocalCache {
         channels.forEach { it ->
             val toBeRemoved = it.value.pruneOldAndHiddenMessages(account)
 
+            val childrenToBeRemoved = mutableListOf<Note>()
+
             toBeRemoved.forEach {
                 notes.remove(it.idHex)
                 // Doesn't need to clean up the replies and mentions.. Too small to matter.
@@ -1150,26 +1297,95 @@ object LocalCache {
                 it.replyTo?.forEach { _ ->
                     it.removeReply(it)
                 }
+
+                childrenToBeRemoved.addAll(it.removeAllChildNotes())
             }
 
-            println("PRUNE: ${toBeRemoved.size} messages removed from ${it.value.toBestDisplayName()}")
+            removeChildrenOf(childrenToBeRemoved)
+
+            if (toBeRemoved.size > 100 || it.value.notes.size > 100) {
+                println("PRUNE: ${toBeRemoved.size} messages removed from ${it.value.toBestDisplayName()}. ${it.value.notes.size} kept")
+            }
+        }
+
+        users.forEach { userPair ->
+            userPair.value.privateChatrooms.values.map {
+                val toBeRemoved = it.pruneMessagesToTheLatestOnly()
+
+                val childrenToBeRemoved = mutableListOf<Note>()
+
+                toBeRemoved.forEach {
+                    notes.remove(it.idHex)
+
+                    // Counts the replies
+                    it.replyTo?.forEach { _ ->
+                        it.removeReply(it)
+                    }
+
+                    childrenToBeRemoved.addAll(it.removeAllChildNotes())
+                }
+
+                removeChildrenOf(childrenToBeRemoved)
+
+                if (toBeRemoved.size > 1) {
+                    println("PRUNE: ${toBeRemoved.size} private messages with ${userPair.value.toBestDisplayName()} removed. ${it.roomMessages.size} kept")
+                }
+            }
+        }
+    }
+
+    fun pruneRepliesAndReactions(account: Account) {
+        checkNotInMainThread()
+        val user = account.userProfile()
+
+        val toBeRemoved = notes.filter {
+            (
+                (it.value.event is TextNoteEvent && !it.value.isNewThread()) ||
+                    it.value.event is ReactionEvent || it.value.event is LnZapEvent || it.value.event is LnZapRequestEvent ||
+                    it.value.event is ReportEvent || it.value.event is GenericRepostEvent
+                ) &&
+                it.value.liveSet?.isInUse() != true && // don't delete if observing.
+                it.value.author != user && // don't delete if it is the logged in account
+                it.value.event?.isTaggedUser(user.pubkeyHex) != true // don't delete if it's a notification to the logged in user
+        }.values
+
+        val childrenToBeRemoved = mutableListOf<Note>()
+
+        toBeRemoved.forEach {
+            notes.remove(it.idHex)
+
+            it.replyTo?.forEach { masterNote ->
+                masterNote.removeReply(it)
+                masterNote.removeBoost(it)
+                masterNote.removeReaction(it)
+                masterNote.removeZap(it)
+                masterNote.clearEOSE() // allows reloading of these events
+            }
+
+            childrenToBeRemoved.addAll(it.removeAllChildNotes())
+        }
+
+        if (toBeRemoved.size > 1) {
+            println("PRUNE: ${toBeRemoved.size} thread replies removed.")
         }
     }
 
     fun pruneHiddenMessages(account: Account) {
         checkNotInMainThread()
 
-        val toBeRemoved = account.hiddenUsers.map {
-            (users[it]?.notes ?: emptySet())
+        val childrenToBeRemoved = mutableListOf<Note>()
+
+        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)
@@ -1180,11 +1396,30 @@ object LocalCache {
             }
 
             notes.remove(it.idHex)
+
+            childrenToBeRemoved.addAll(it.removeAllChildNotes())
         }
 
+        removeChildrenOf(childrenToBeRemoved)
+
         println("PRUNE: ${toBeRemoved.size} messages removed because they were Hidden")
     }
 
+    fun removeChildrenOf(nextToBeRemoved: List<Note>) {
+        nextToBeRemoved.forEach { note ->
+            if (note.event is LnZapEvent) {
+                (note.event as LnZapEvent).zappedAuthor().mapNotNull { getUserIfExists(it)?.removeZap(note) }
+            }
+            if (note.event is LnZapRequestEvent) {
+                (note.event as LnZapRequestEvent).zappedAuthor().mapNotNull { getUserIfExists(it)?.removeZap(note) }
+            }
+            if (note.event is ReportEvent) {
+                (note.event as ReportEvent).reportedAuthor().mapNotNull { getUserIfExists(it.key)?.removeZap(note) }
+            }
+            notes.remove(note.idHex)
+        }
+    }
+
     fun pruneContactLists(userAccount: Account) {
         checkNotInMainThread()
 
@@ -1232,12 +1467,25 @@ object LocalCache {
                 is ChannelMessageEvent -> consume(event, relay)
                 is ChannelMetadataEvent -> consume(event)
                 is ChannelMuteUserEvent -> consume(event)
+                is ChatMessageEvent -> consume(event, relay)
+                is ClassifiedsEvent -> consume(event)
+                is CommunityDefinitionEvent -> consume(event, relay)
+                is CommunityPostApprovalEvent -> {
+                    event.containedPost()?.let {
+                        verifyAndConsume(it, relay)
+                    }
+                    consume(event)
+                }
                 is ContactListEvent -> consume(event)
                 is DeletionEvent -> consume(event)
+                is EmojiPackEvent -> consume(event)
+                is EmojiPackSelectionEvent -> consume(event)
+                is SealedGossipEvent -> consume(event, relay)
 
                 is FileHeaderEvent -> consume(event, relay)
                 is FileStorageEvent -> consume(event, relay)
                 is FileStorageHeaderEvent -> consume(event, relay)
+                is GiftWrapEvent -> consume(event, relay)
                 is HighlightEvent -> consume(event, relay)
                 is LiveActivitiesEvent -> consume(event, relay)
                 is LiveActivitiesChatMessageEvent -> consume(event, relay)
@@ -1252,6 +1500,7 @@ 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)
@@ -1289,7 +1538,7 @@ class LocalCacheLiveData {
     val newEventBundles = _newEventBundles.asSharedFlow() // read-only public view
 
     // Refreshes observers in batches.
-    private val bundler = BundledInsert<Note>(300, Dispatchers.IO)
+    private val bundler = BundledInsert<Note>(1000, Dispatchers.IO)
 
     fun invalidateData(newNote: Note) {
         bundler.invalidateList(newNote) { bundledNewNotes ->

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

@@ -5,11 +5,14 @@ import androidx.compose.runtime.Stable
 import androidx.lifecycle.LiveData
 import com.vitorpamplona.amethyst.service.NostrSingleEventDataSource
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
+import com.vitorpamplona.amethyst.service.firstFullCharOrEmoji
 import com.vitorpamplona.amethyst.service.lnurl.LnInvoiceUtil
 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
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
@@ -19,7 +22,6 @@ import java.math.BigDecimal
 import java.time.Instant
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
-import java.util.Date
 import java.util.regex.Pattern
 
 val tagSearch = Pattern.compile("(?:\\s|\\A)\\#\\[([0-9]+)\\]")
@@ -74,14 +76,27 @@ 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? {
-        return (event as? ChannelMessageEvent)?.channel()
-            ?: (event as? ChannelMetadataEvent)?.channel()
-            ?: (event as? ChannelCreateEvent)?.id
-            ?: (event as? LiveActivitiesChatMessageEvent)?.activity()?.toTag()
-            ?: (event as? LiveActivitiesEvent)?.address()?.toTag()
+        return if (event is ChannelMessageEvent ||
+            event is ChannelMetadataEvent ||
+            event is ChannelCreateEvent ||
+            event is LiveActivitiesChatMessageEvent ||
+            event is LiveActivitiesEvent
+        ) {
+            (event as? ChannelMessageEvent)?.channel()
+                ?: (event as? ChannelMetadataEvent)?.channel()
+                ?: (event as? ChannelCreateEvent)?.id
+                ?: (event as? LiveActivitiesChatMessageEvent)?.activity()?.toTag()
+                ?: (event as? LiveActivitiesEvent)?.address()?.toTag()
+        } else {
+            null
+        }
     }
 
     open fun address(): ATag? = null
@@ -143,8 +158,38 @@ open class Note(val idHex: String) {
         boosts = boosts - note
         liveSet?.boosts?.invalidateData()
     }
+
+    fun removeAllChildNotes(): Set<Note> {
+        val toBeRemoved = replies +
+            reactions.values.flatten() +
+            boosts +
+            reports.values.flatten() +
+            zaps.keys +
+            zaps.values.filterNotNull() +
+            zapPayments.keys +
+            zapPayments.values.filterNotNull()
+
+        replies = setOf<Note>()
+        reactions = mapOf<String, Set<Note>>()
+        boosts = setOf<Note>()
+        reports = mapOf<User, Set<Note>>()
+        zaps = mapOf<Note, Note?>()
+        zapPayments = mapOf<Note, Note?>()
+        relays = setOf<String>()
+        lastReactionsDownloadTime = emptyMap()
+
+        liveSet?.replies?.invalidateData()
+        liveSet?.reactions?.invalidateData()
+        liveSet?.boosts?.invalidateData()
+        liveSet?.reports?.invalidateData()
+        liveSet?.zaps?.invalidateData()
+
+        return toBeRemoved
+    }
+
     fun removeReaction(note: Note) {
-        val reaction = note.event?.content() ?: "+"
+        val tags = note.event?.tags() ?: emptyList()
+        val reaction = note.event?.content()?.firstFullCharOrEmoji(ImmutableListOfLists(tags)) ?: "+"
 
         if (reaction in reactions.keys && reactions[reaction]?.contains(note) == true) {
             reactions[reaction]?.let {
@@ -201,31 +246,64 @@ 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()
+            }
         }
     }
 
     fun addReaction(note: Note) {
-        val reaction = note.event?.content() ?: "+"
+        val tags = note.event?.tags() ?: emptyList()
+        val reaction = note.event?.content()?.firstFullCharOrEmoji(ImmutableListOfLists(tags)) ?: "+"
 
         if (reaction !in reactions.keys) {
             reactions = reactions + Pair(reaction, setOf(note))
@@ -270,10 +348,63 @@ open class Note(val idHex: String) {
         }
     }
 
-    fun isReactedBy(user: User): String? {
-        return reactions.filter {
-            it.value.any { it.author?.pubkeyHex == user.pubkeyHex }
-        }.keys.firstOrNull()
+    fun publicZapAuthors(): Set<User> {
+        // Zaps who the requester was the user
+        return zaps.mapNotNull {
+            it.key.author
+        }.toSet()
+    }
+
+    fun publicZapAuthorHexes(): Set<HexKey> {
+        // Zaps who the requester was the user
+        return zaps.mapNotNull {
+            it.key.author?.pubkeyHex
+        }.toSet()
+    }
+
+    fun reactionAuthors(): Set<User> {
+        // Zaps who the requester was the user
+        return reactions.values.map {
+            it.mapNotNull { it.author }
+        }.flatten().toSet()
+    }
+
+    fun reactionAuthorHexes(): Set<HexKey> {
+        // Zaps who the requester was the user
+        return reactions.values.map {
+            it.mapNotNull { it.author?.pubkeyHex }
+        }.flatten().toSet()
+    }
+
+    fun replyAuthorHexes(): Set<HexKey> {
+        // Zaps who the requester was the user
+        return replies.mapNotNull {
+            it.author?.pubkeyHex
+        }.toSet()
+    }
+
+    fun replyAuthors(): Set<User> {
+        // Zaps who the requester was the user
+        return replies.mapNotNull {
+            it.author
+        }.toSet()
+    }
+
+    fun boostAuthors(): Set<User> {
+        // Zaps who the requester was the user
+        return boosts.mapNotNull {
+            it.author
+        }.toSet()
+    }
+
+    fun getReactionBy(user: User): String? {
+        return reactions.firstNotNullOfOrNull {
+            if (it.value.any { it.author?.pubkeyHex == user.pubkeyHex }) {
+                it.key
+            } else {
+                null
+            }
+        }
     }
 
     fun isBoostedBy(user: User): Boolean {
@@ -372,7 +503,7 @@ open class Note(val idHex: String) {
     }
 
     fun hasAnyReports(): Boolean {
-        val dayAgo = Date().time / 1000 - 24 * 60 * 60
+        val dayAgo = TimeUtils.oneDayAgo()
         return reports.isNotEmpty() ||
             (
                 author?.reports?.values?.any {
@@ -401,7 +532,7 @@ open class Note(val idHex: String) {
     }
 
     fun reactedBy(loggedIn: User, content: String): List<Note> {
-        return reactions[content]?.filter { it.author == loggedIn && it.event?.content() == content } ?: emptyList()
+        return reactions[content]?.filter { it.author == loggedIn } ?: emptyList()
     }
 
     fun reactedBy(loggedIn: User): List<String> {
@@ -409,8 +540,7 @@ open class Note(val idHex: String) {
     }
 
     fun hasBoostedInTheLast5Minutes(loggedIn: User): Boolean {
-        val currentTime = Date().time / 1000
-        return boosts.firstOrNull { it.author == loggedIn && (it.createdAt() ?: 0) > currentTime - (60 * 5) } != null // 5 minute protection
+        return boosts.firstOrNull { it.author == loggedIn && (it.createdAt() ?: 0) > TimeUtils.fiveMinutesAgo() } != null // 5 minute protection
     }
 
     fun boostedBy(loggedIn: User): List<Note> {
@@ -453,6 +583,10 @@ open class Note(val idHex: String) {
         zaps = emptyMap()
     }
 
+    fun clearEOSE() {
+        lastReactionsDownloadTime = emptyMap()
+    }
+
     var liveSet: NoteLiveSet? = null
 
     fun live(): NoteLiveSet {
@@ -467,6 +601,22 @@ 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) {
@@ -493,10 +643,14 @@ class NoteLiveSet(u: Note) {
 
 class NoteLiveData(val note: Note) : LiveData<NoteState>(NoteState(note)) {
     // Refreshes observers in batches.
-    private val bundler = BundledUpdate(300, Dispatchers.IO)
+    private val bundler = BundledUpdate(500, Dispatchers.IO)
 
     fun invalidateData() {
+        checkNotInMainThread()
+
         bundler.invalidate() {
+            checkNotInMainThread()
+
             if (hasActiveObservers()) {
                 postValue(NoteState(note))
             }

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

@@ -0,0 +1,75 @@
+package com.vitorpamplona.amethyst.model
+
+class ParticipantListBuilder {
+    private fun addFollowsThatDirectlyParticipateOnToSet(baseNote: Note, followingSet: Set<HexKey>?, set: MutableSet<User>) {
+        baseNote.author?.let { author ->
+            if (author !in set && (followingSet == null || author.pubkeyHex in followingSet)) set.add(author)
+        }
+
+        // Breaks these searchers down to avoid the memory use of creating multiple lists
+        baseNote.replies.forEach { reply ->
+            reply.author?.let { author ->
+                if (author !in set && (followingSet == null || author.pubkeyHex in followingSet)) set.add(author)
+            }
+        }
+
+        baseNote.boosts.forEach { boost ->
+            boost.author?.let { author ->
+                if (author !in set && (followingSet == null || author.pubkeyHex in followingSet)) set.add(author)
+            }
+        }
+
+        baseNote.zaps.forEach { zapPair ->
+            zapPair.key.author?.let { author ->
+                if (author !in set && (followingSet == null || author.pubkeyHex in followingSet)) set.add(author)
+            }
+        }
+
+        baseNote.reactions.forEach { reactionSet ->
+            reactionSet.value.forEach { reaction ->
+                reaction.author?.let { author ->
+                    if (author !in set && (followingSet == null || author.pubkeyHex in followingSet)) set.add(author)
+                }
+            }
+        }
+    }
+
+    fun followsThatParticipateOnDirect(baseNote: Note?, followingSet: Set<HexKey>?): Set<User> {
+        if (baseNote == null) return mutableSetOf()
+
+        val set = mutableSetOf<User>()
+        addFollowsThatDirectlyParticipateOnToSet(baseNote, followingSet, set)
+        return set
+    }
+
+    fun followsThatParticipateOn(baseNote: Note?, followingSet: Set<HexKey>?): Set<User> {
+        if (baseNote == null) return mutableSetOf()
+
+        val mySet = mutableSetOf<User>()
+        addFollowsThatDirectlyParticipateOnToSet(baseNote, followingSet, mySet)
+
+        baseNote.replies.forEach {
+            addFollowsThatDirectlyParticipateOnToSet(it, followingSet, mySet)
+        }
+
+        baseNote.boosts.forEach {
+            it.replyTo?.forEach {
+                addFollowsThatDirectlyParticipateOnToSet(it, followingSet, mySet)
+            }
+        }
+
+        LocalCache.getChannelIfExists(baseNote.idHex)?.notes?.values?.forEach {
+            addFollowsThatDirectlyParticipateOnToSet(it, followingSet, mySet)
+        }
+
+        return mySet
+    }
+
+    fun countFollowsThatParticipateOn(baseNote: Note?, followingSet: Set<HexKey>?): Int {
+        if (baseNote == null) return 0
+
+        val list = followsThatParticipateOn(baseNote, followingSet)
+
+        return list.size
+    }
+}

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

@@ -0,0 +1,40 @@
+package com.vitorpamplona.amethyst.model
+
+import androidx.compose.runtime.Stable
+import com.vitorpamplona.amethyst.R
+
+@Stable
+class Settings(
+    var preferredLanguage: String? = 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/ThreadAssembler.kt

@@ -1,7 +1,6 @@
 package com.vitorpamplona.amethyst.model
 
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
-import com.vitorpamplona.amethyst.service.model.ATag
 import com.vitorpamplona.amethyst.service.model.GenericRepostEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
 import kotlin.time.ExperimentalTime
@@ -43,16 +42,7 @@ class ThreadAssembler {
         checkNotInMainThread()
 
         val (result, elapsed) = measureTimedValue {
-            val note = if (noteId.contains(":")) {
-                val aTag = ATag.parse(noteId, null)
-                if (aTag != null) {
-                    LocalCache.getOrCreateAddressableNote(aTag)
-                } else {
-                    return emptySet()
-                }
-            } else {
-                LocalCache.getOrCreateNote(noteId)
-            }
+            val note = LocalCache.checkGetOrCreateNote(noteId) ?: return emptySet<Note>()
 
             if (note.event != null) {
                 val thread = mutableSetOf<Note>()

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

@@ -0,0 +1,17 @@
+package com.vitorpamplona.amethyst.model
+
+object TimeUtils {
+    const val oneMinute = 60
+    const val fiveMinutes = 5 * oneMinute
+    const val oneHour = 60 * oneMinute
+    const val eightHours = 8 * oneHour
+    const val oneDay = 24 * oneHour
+    const val oneWeek = 7 * oneDay
+
+    fun now() = System.currentTimeMillis() / 1000
+    fun fiveMinutesAgo() = now() - fiveMinutes
+    fun oneHourAgo() = now() - oneHour
+    fun oneDayAgo() = now() - oneDay
+    fun eightHoursAgo() = now() - eightHours
+    fun oneWeekAgo() = now() - oneWeek
+}

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
@@ -12,12 +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
 
@@ -30,9 +32,6 @@ class User(val pubkeyHex: String) {
     var latestContactList: ContactListEvent? = null
     var latestBookmarkList: BookmarkListEvent? = null
 
-    var notes = setOf<Note>()
-        private set
-
     var reports = mapOf<User, Set<Note>>()
         private set
 
@@ -47,13 +46,13 @@ class User(val pubkeyHex: String) {
     var privateChatrooms = mapOf<User, Chatroom>()
         private set
 
-    var acceptedBadges: AddressableNote? = null
-
     fun pubkey() = Hex.decode(pubkeyHex)
     fun pubkeyNpub() = pubkey().toNpub()
 
     fun pubkeyDisplayHex() = pubkeyNpub().toShortenHex()
 
+    fun toNostrUri() = "nostr:${pubkeyNpub()}"
+
     override fun toString(): String = pubkeyHex
 
     fun toBestDisplayName(): String {
@@ -105,21 +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
 
@@ -143,13 +127,6 @@ class User(val pubkeyHex: String) {
         }
     }
 
-    fun updateAcceptedBadges(note: AddressableNote) {
-        if (acceptedBadges?.idHex != note.idHex) {
-            acceptedBadges = note
-            liveSet?.badges?.invalidateData()
-        }
-    }
-
     fun addZap(zapRequest: Note, zap: Note?) {
         if (zapRequest !in zaps.keys) {
             zaps = zaps + Pair(zapRequest, zap)
@@ -160,6 +137,16 @@ class User(val pubkeyHex: String) {
         }
     }
 
+    fun removeZap(zapRequestOrZapEvent: Note) {
+        if (zapRequestOrZapEvent in zaps.keys) {
+            zaps = zaps.minus(zapRequestOrZapEvent)
+            liveSet?.zaps?.invalidateData()
+        } else if (zapRequestOrZapEvent in zaps.values) {
+            zaps = zaps.filter { it.value != zapRequestOrZapEvent }
+            liveSet?.zaps?.invalidateData()
+        }
+    }
+
     fun zappedAmount(): BigDecimal {
         return zaps.mapNotNull { it.value?.event }
             .filterIsInstance<LnZapEvent>()
@@ -187,34 +174,34 @@ class User(val pubkeyHex: String) {
     }
 
     @Synchronized
-    private fun getOrCreatePrivateChatroom(user: User): Chatroom {
+    private fun getOrCreatePrivateChatroomSync(user: User): Chatroom {
         checkNotInMainThread()
 
         return privateChatrooms[user] ?: run {
-            val privateChatroom = Chatroom(setOf<Note>())
+            val privateChatroom = Chatroom()
             privateChatrooms = privateChatrooms + Pair(user, privateChatroom)
             privateChatroom
         }
     }
 
-    @Synchronized
-    fun addMessage(user: User, msg: Note) {
-        checkNotInMainThread()
+    private fun getOrCreatePrivateChatroom(user: User): Chatroom {
+        return privateChatrooms[user] ?: getOrCreatePrivateChatroomSync(user)
+    }
 
+    fun addMessage(user: User, msg: Note) {
         val privateChatroom = getOrCreatePrivateChatroom(user)
         if (msg !in privateChatroom.roomMessages) {
-            privateChatroom.roomMessages = privateChatroom.roomMessages + msg
+            privateChatroom.addMessageSync(msg)
             liveSet?.messages?.invalidateData()
         }
     }
 
-    @Synchronized
     fun removeMessage(user: User, msg: Note) {
         checkNotInMainThread()
 
         val privateChatroom = getOrCreatePrivateChatroom(user)
         if (msg in privateChatroom.roomMessages) {
-            privateChatroom.roomMessages = privateChatroom.roomMessages - msg
+            privateChatroom.removeMessageSync(msg)
             liveSet?.messages?.invalidateData()
         }
     }
@@ -237,6 +224,7 @@ class User(val pubkeyHex: String) {
         info = newUserInfo
         info?.latestMetadata = latestMetadata
         info?.updatedMetadataAt = latestMetadata.createdAt
+        info?.tags = latestMetadata.tags.toImmutableListOfLists()
 
         if (newUserInfo.lud16.isNullOrBlank() && newUserInfo.lud06?.lowercase()?.startsWith("lnurl") == true) {
             try {
@@ -271,6 +259,12 @@ class User(val pubkeyHex: String) {
         } ?: false
     }
 
+    fun isFollowingGeohashCached(geoTag: String): Boolean {
+        return latestContactList?.verifiedFollowGeohashSet?.let {
+            return geoTag.lowercase() in it
+        } ?: false
+    }
+
     fun isFollowingCached(user: User): Boolean {
         return latestContactList?.verifiedFollowKeySet?.let {
             return user.pubkeyHex in it
@@ -299,6 +293,14 @@ class User(val pubkeyHex: String) {
         return latestContactList?.verifiedFollowTagSet ?: emptySet()
     }
 
+    fun cachedFollowingGeohashSet(): Set<HexKey> {
+        return latestContactList?.verifiedFollowGeohashSet ?: emptySet()
+    }
+
+    fun cachedFollowingCommunitiesSet(): Set<HexKey> {
+        return latestContactList?.verifiedFollowCommunitySet ?: emptySet()
+    }
+
     fun cachedFollowCount(): Int? {
         return latestContactList?.verifiedFollowKeySet?.size
     }
@@ -349,7 +351,6 @@ 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 {
@@ -361,7 +362,6 @@ class UserLiveSet(u: User) {
             relayInfo.hasObservers() ||
             metadata.hasObservers() ||
             zaps.hasObservers() ||
-            badges.hasObservers() ||
             bookmarks.hasObservers()
     }
 }
@@ -373,7 +373,43 @@ data class RelayInfo(
     var counter: Long
 )
 
-data class Chatroom(var roomMessages: Set<Note>)
+class Chatroom() {
+    var roomMessages: Set<Note> = setOf()
+
+    @Synchronized
+    fun addMessageSync(msg: Note) {
+        checkNotInMainThread()
+
+        if (msg !in roomMessages) {
+            roomMessages = roomMessages + msg
+        }
+    }
+
+    @Synchronized
+    fun removeMessageSync(msg: Note) {
+        checkNotInMainThread()
+
+        if (msg !in roomMessages) {
+            roomMessages = roomMessages + msg
+        }
+    }
+
+    fun pruneMessagesToTheLatestOnly(): Set<Note> {
+        val sorted = roomMessages.sortedWith(compareBy({ it.createdAt() }, { it.idHex })).reversed()
+
+        val toKeep = if ((sorted.firstOrNull()?.createdAt() ?: 0) > TimeUtils.oneWeekAgo()) {
+            // Recent messages, keep last 100
+            sorted.take(100).toSet()
+        } else {
+            // Old messages, keep the last one.
+            sorted.take(1).toSet()
+        } + sorted.filter { it.liveSet?.isInUse() ?: false }
+
+        val toRemove = roomMessages.minus(toKeep)
+        roomMessages = toKeep
+        return toRemove
+    }
+}
 
 @Stable
 class UserMetadata {
@@ -401,6 +437,7 @@ class UserMetadata {
 
     var updatedMetadataAt: Long = 0
     var latestMetadata: MetadataEvent? = null
+    var tags: ImmutableListOfLists<String>? = null
 
     fun anyName(): String? {
         return display_name ?: displayName ?: name ?: username
@@ -414,14 +451,35 @@ class UserMetadata {
     fun lnAddress(): String? {
         return (lud16?.trim() ?: lud06?.trim())?.ifBlank { null }
     }
+
+    fun bestUsername(): String? {
+        return name?.ifBlank { null } ?: username?.ifBlank { null }
+    }
+
+    fun bestDisplayName(): String? {
+        return displayName?.ifBlank { null } ?: display_name?.ifBlank { null }
+    }
+
+    fun nip05(): String? {
+        return nip05?.ifBlank { null }
+    }
+
+    fun profilePicture(): String? {
+        if (picture.isNullOrBlank()) picture = null
+        return picture
+    }
 }
 
 class UserLiveData(val user: User) : LiveData<UserState>(UserState(user)) {
     // Refreshes observers in batches.
-    private val bundler = BundledUpdate(300, Dispatchers.IO)
+    private val bundler = BundledUpdate(500, Dispatchers.IO)
 
     fun invalidateData() {
+        checkNotInMainThread()
+
         bundler.invalidate() {
+            checkNotInMainThread()
+
             if (hasActiveObservers()) {
                 postValue(UserState(user))
             }

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/BlurHashDecoder.kt

@@ -49,6 +49,8 @@ object BlurHashDecoder {
      *                 By default it is true.
      */
     fun decode(blurHash: String?, width: Int, height: Int, punch: Float = 1f, useCache: Boolean = true): Bitmap? {
+        checkNotInMainThread()
+
         if (blurHash == null || blurHash.length < 6) {
             return null
         }

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

@@ -0,0 +1,291 @@
+package com.vitorpamplona.amethyst.service
+
+import android.util.Log
+import android.util.LruCache
+import android.util.Patterns
+import androidx.compose.runtime.Immutable
+import com.linkedin.urls.detection.UrlDetector
+import com.linkedin.urls.detection.UrlDetectorOptions
+import com.vitorpamplona.amethyst.ui.actions.ImmutableListOfLists
+import com.vitorpamplona.amethyst.ui.components.ZoomableUrlContent
+import com.vitorpamplona.amethyst.ui.components.ZoomableUrlImage
+import com.vitorpamplona.amethyst.ui.components.ZoomableUrlVideo
+import com.vitorpamplona.amethyst.ui.components.hashTagsPattern
+import com.vitorpamplona.amethyst.ui.components.imageExtensions
+import com.vitorpamplona.amethyst.ui.components.startsWithNIP19Scheme
+import com.vitorpamplona.amethyst.ui.components.tagIndex
+import com.vitorpamplona.amethyst.ui.components.videoExtensions
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.ImmutableMap
+import kotlinx.collections.immutable.ImmutableSet
+import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.collections.immutable.toImmutableMap
+import kotlinx.collections.immutable.toImmutableSet
+import java.util.regex.Pattern
+
+@Immutable
+data class RichTextViewerState(
+    val urlSet: ImmutableSet<String>,
+    val imagesForPager: ImmutableMap<String, ZoomableUrlContent>,
+    val imageList: ImmutableList<ZoomableUrlContent>,
+    val customEmoji: ImmutableMap<String, String>,
+    val paragraphs: ImmutableList<ParagraphState>
+)
+
+data class ParagraphState(val words: ImmutableList<Segment>, val isRTL: Boolean)
+
+object CachedRichTextParser {
+    val richTextCache = LruCache<String, RichTextViewerState>(200)
+
+    fun parseText(content: String, tags: ImmutableListOfLists<String>): RichTextViewerState {
+        return if (richTextCache[content] != null) {
+            richTextCache[content]
+        } else {
+            val newUrls = RichTextParser().parseText(content, tags)
+            richTextCache.put(content, newUrls)
+            newUrls
+        }
+    }
+}
+
+// Group 1 = url, group 4 additional chars
+// val noProtocolUrlValidator = Pattern.compile("(([\\w\\d-]+\\.)*[a-zA-Z][\\w-]+[\\.\\:]\\w+([\\/\\?\\=\\&\\#\\.]?[\\w-]+)*\\/?)(.*)")
+
+// Android9 seems to have an issue starting this regex.
+val noProtocolUrlValidator = try {
+    Pattern.compile("(([\\w\\d-]+\\.)*[a-zA-Z][\\w-]+[\\.\\:]\\w+([\\/\\?\\=\\&\\#\\.]?[\\w-]*[^\\p{IsHan}\\p{IsHiragana}\\p{IsKatakana}])*\\/?)(.*)")
+} catch (e: Exception) {
+    Pattern.compile("(([\\w\\d-]+\\.)*[a-zA-Z][\\w-]+[\\.\\:]\\w+([\\/\\?\\=\\&\\#\\.]?[\\w-]+)*\\/?)(.*)")
+}
+
+class RichTextParser() {
+    fun parseText(
+        content: String,
+        tags: ImmutableListOfLists<String>
+    ): RichTextViewerState {
+        val urls = UrlDetector(content, UrlDetectorOptions.Default).detect()
+
+        val urlSet = urls.mapNotNullTo(LinkedHashSet(urls.size)) {
+            // removes e-mails
+            if (Patterns.EMAIL_ADDRESS.matcher(it.originalUrl).matches()) {
+                null
+            } else if (isNumber(it.originalUrl)) {
+                null
+            } else if (it.originalUrl.contains("。")) {
+                null
+            } else {
+                val pattern = "^((http|https)://)?([A-Za-z0-9-]+(\\.[A-Za-z0-9]+)+)(:[0-9]+)?(/[^?#]*)?(\\?[^#]*)?(#.*)?".toRegex(RegexOption.IGNORE_CASE)
+                if (pattern.matches(it.originalUrl)) {
+                    it.originalUrl
+                } else {
+                    null
+                }
+            }
+        }
+
+        val imagesForPager = urlSet.mapNotNull { fullUrl ->
+            val removedParamsFromUrl = fullUrl.split("?")[0].lowercase()
+            if (imageExtensions.any { removedParamsFromUrl.endsWith(it) }) {
+                ZoomableUrlImage(fullUrl)
+            } else if (videoExtensions.any { removedParamsFromUrl.endsWith(it) }) {
+                ZoomableUrlVideo(fullUrl)
+            } else {
+                null
+            }
+        }.associateBy { it.url }
+        val imageList = imagesForPager.values.toList()
+
+        val emojiMap =
+            tags.lists.filter { it.size > 2 && it[0] == "emoji" }.associate { ":${it[1]}:" to it[2] }
+
+        val segments = findTextSegments(content, imagesForPager.keys, urlSet, emojiMap, tags)
+
+        return RichTextViewerState(
+            urlSet.toImmutableSet(),
+            imagesForPager.toImmutableMap(),
+            imageList.toImmutableList(),
+            emojiMap.toImmutableMap(),
+            segments
+        )
+    }
+
+    private fun findTextSegments(content: String, images: Set<String>, urls: Set<String>, emojis: Map<String, String>, tags: ImmutableListOfLists<String>): ImmutableList<ParagraphState> {
+        var paragraphSegments = persistentListOf<ParagraphState>()
+
+        content.split('\n').forEach { paragraph ->
+            var segments = persistentListOf<Segment>()
+            var isDirty = false
+
+            val isRTL = isArabic(paragraph)
+
+            val wordList = paragraph.split(' ')
+            wordList.forEach { word ->
+                val wordSegment = wordIdentifier(word, images, urls, emojis, tags)
+                if (wordSegment !is RegularTextSegment) {
+                    isDirty = true
+                }
+                segments = segments.add(wordSegment)
+            }
+
+            val newSegments = if (isDirty) {
+                ParagraphState(segments, isRTL)
+            } else {
+                ParagraphState(persistentListOf<Segment>(RegularTextSegment(paragraph)), isRTL)
+            }
+
+            paragraphSegments = paragraphSegments.add(newSegments)
+        }
+
+        return paragraphSegments
+    }
+
+    fun isNumber(word: String): Boolean {
+        return numberPattern.matcher(word).matches()
+    }
+
+    fun isDate(word: String): Boolean {
+        return shortDatePattern.matcher(word).matches() || longDatePattern.matcher(word).matches()
+    }
+
+    private fun isArabic(text: String): Boolean {
+        return text.any { it in '\u0600'..'\u06FF' || it in '\u0750'..'\u077F' }
+    }
+
+    private fun wordIdentifier(word: String, images: Set<String>, urls: Set<String>, emojis: Map<String, String>, tags: ImmutableListOfLists<String>): Segment {
+        val emailMatcher = Patterns.EMAIL_ADDRESS.matcher(word)
+        val phoneMatcher = Patterns.PHONE.matcher(word)
+        val schemelessMatcher = noProtocolUrlValidator.matcher(word)
+
+        return if (word.isEmpty()) {
+            RegularTextSegment(word)
+        } else if (images.contains(word)) {
+            ImageSegment(word)
+        } else if (urls.contains(word)) {
+            LinkSegment(word)
+        } else if (emojis.any { word.contains(it.key) }) {
+            EmojiSegment(word)
+        } else if (word.startsWith("lnbc", true)) {
+            InvoiceSegment(word)
+        } else if (word.startsWith("lnurl", true)) {
+            WithdrawSegment(word)
+        } else if (word.startsWith("cashuA", true)) {
+            CashuSegment(word)
+        } else if (emailMatcher.matches()) {
+            EmailSegment(word)
+        } else if (word.length in 7..14 && !isDate(word) && phoneMatcher.matches()) {
+            PhoneSegment(word)
+        } else if (startsWithNIP19Scheme(word)) {
+            BechSegment(word)
+        } else if (word.startsWith("#")) {
+            parseHash(word, tags)
+        } else if (schemelessMatcher.find()) {
+            val url = schemelessMatcher.group(1) // url
+            val additionalChars = schemelessMatcher.group(4) // additional chars
+            val pattern = "^([A-Za-z0-9-]+(\\.[A-Za-z0-9]+)+)(:[0-9]+)?(/[^?#]*)?(\\?[^#]*)?(#.*)?".toRegex(RegexOption.IGNORE_CASE)
+            if (pattern.matches(word)) {
+                SchemelessUrlSegment(word, url, additionalChars)
+            } else {
+                RegularTextSegment(word)
+            }
+        } else {
+            RegularTextSegment(word)
+        }
+    }
+
+    private fun parseHash(word: String, tags: ImmutableListOfLists<String>): Segment {
+        // First #[n]
+
+        val matcher = tagIndex.matcher(word)
+        try {
+            if (matcher.find()) {
+                val index = matcher.group(1)?.toInt()
+                val suffix = matcher.group(2)
+
+                if (index != null && index >= 0 && index < tags.lists.size) {
+                    val tag = tags.lists[index]
+
+                    if (tag.size > 1) {
+                        if (tag[0] == "p") {
+                            return HashIndexUserSegment(word, tag[1], suffix)
+                        } else if (tag[0] == "e" || tag[0] == "a") {
+                            return HashIndexEventSegment(word, tag[1], suffix)
+                        }
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            Log.w("Tag Parser", "Couldn't link tag $word", e)
+        }
+
+        // Second #Amethyst
+        val hashtagMatcher = hashTagsPattern.matcher(word)
+
+        try {
+            if (hashtagMatcher.find()) {
+                val hashtag = hashtagMatcher.group(1)
+                if (hashtag != null) {
+                    return HashTagSegment(word, hashtag, hashtagMatcher.group(2))
+                }
+            }
+        } catch (e: Exception) {
+            Log.e("Hashtag Parser", "Couldn't link hashtag $word", e)
+        }
+
+        return RegularTextSegment(word)
+    }
+
+    companion object {
+        val longDatePattern: Pattern = Pattern.compile("^\\d{4}-\\d{2}-\\d{2}$")
+        val shortDatePattern: Pattern = Pattern.compile("^\\d{2}-\\d{2}-\\d{2}$")
+        val numberPattern: Pattern = Pattern.compile("^(-?[\\d.]+)([a-zA-Z%]*)$")
+    }
+}
+
+@Immutable
+open class Segment(val segmentText: String)
+
+@Immutable
+class ImageSegment(segment: String) : Segment(segment)
+
+@Immutable
+class LinkSegment(segment: String) : Segment(segment)
+
+@Immutable
+class EmojiSegment(segment: String) : Segment(segment)
+
+@Immutable
+class InvoiceSegment(segment: String) : Segment(segment)
+
+@Immutable
+class WithdrawSegment(segment: String) : Segment(segment)
+
+@Immutable
+class CashuSegment(segment: String) : Segment(segment)
+
+@Immutable
+class EmailSegment(segment: String) : Segment(segment)
+
+@Immutable
+class PhoneSegment(segment: String) : Segment(segment)
+
+@Immutable
+class BechSegment(segment: String) : Segment(segment)
+
+@Immutable
+open class HashIndexSegment(segment: String, val hex: String, val extras: String?) : Segment(segment)
+
+@Immutable
+class HashIndexUserSegment(segment: String, hex: String, extras: String?) : HashIndexSegment(segment, hex, extras)
+
+@Immutable
+class HashIndexEventSegment(segment: String, hex: String, extras: String?) : HashIndexSegment(segment, hex, extras)
+
+@Immutable
+class HashTagSegment(segment: String, val hashtag: String, val extras: String?) : Segment(segment)
+
+@Immutable
+class SchemelessUrlSegment(segment: String, val url: String, val extras: String?) : Segment(segment)
+
+@Immutable
+class RegularTextSegment(segment: String) : Segment(segment)

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

@@ -0,0 +1,99 @@
+package com.vitorpamplona.amethyst.service
+
+import androidx.compose.runtime.Immutable
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.google.gson.JsonArray
+import com.google.gson.JsonObject
+import com.google.gson.JsonParser
+import com.vitorpamplona.amethyst.service.lnurl.LightningAddressResolver
+import com.vitorpamplona.amethyst.ui.components.GenericLoadable
+import okhttp3.MediaType.Companion.toMediaType
+import okhttp3.Request
+import okhttp3.RequestBody.Companion.toRequestBody
+import java.util.Base64
+
+@Immutable
+data class CashuToken(
+    val token: String,
+    val mint: String,
+    val totalAmount: Long,
+    val fees: Int,
+    val redeemInvoiceAmount: Long,
+    val proofs: JsonArray
+)
+
+class CashuProcessor {
+    fun parse(cashuToken: String): GenericLoadable<CashuToken> {
+        checkNotInMainThread()
+
+        try {
+            val base64token = cashuToken.replace("cashuA", "")
+            val cashu = JsonParser.parseString(String(Base64.getDecoder().decode(base64token)))
+            val token = cashu.asJsonObject.get("token").asJsonArray[0].asJsonObject
+            val proofs = token["proofs"].asJsonArray
+            val mint = token["mint"].asString
+
+            var totalAmount = 0L
+            for (proof in proofs) {
+                totalAmount += proof.asJsonObject["amount"].asLong
+            }
+            val fees = Math.max(((totalAmount * 0.02).toInt()), 2)
+            val redeemInvoiceAmount = totalAmount - fees
+
+            return GenericLoadable.Loaded(CashuToken(cashuToken, mint, totalAmount, fees, redeemInvoiceAmount, proofs))
+        } catch (e: Exception) {
+            return GenericLoadable.Error<CashuToken>("Could not parse this cashu token")
+        }
+    }
+
+    fun melt(token: CashuToken, lud16: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+        checkNotInMainThread()
+
+        runCatching {
+            LightningAddressResolver().lnAddressInvoice(
+                lnaddress = lud16,
+                milliSats = token.redeemInvoiceAmount * 1000, // Make invoice and leave room for fees
+                message = "Redeem Cashu",
+                onSuccess = { invoice ->
+                    meltInvoice(token, invoice, onSuccess, onError)
+                },
+                onProgress = {
+                },
+                onError = onError
+            )
+        }
+    }
+
+    private fun meltInvoice(token: CashuToken, invoice: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+        try {
+            val client = HttpClient.getHttpClient()
+            val url = token.mint + "/melt" // Melt cashu tokens at Mint
+
+            val jsonObject = JsonObject()
+            jsonObject.add("proofs", token.proofs)
+            jsonObject.addProperty("pr", invoice)
+
+            val mediaType = "application/json; charset=utf-8".toMediaType()
+            val requestBody = jsonObject.toString().toRequestBody(mediaType)
+            val request = Request.Builder()
+                .url(url)
+                .post(requestBody)
+                .build()
+
+            client.newCall(request).execute().use {
+                val body = it.body.string()
+                val tree = jacksonObjectMapper().readTree(body)
+
+                val successful = tree?.get("paid")?.asText() == "true"
+
+                if (successful) {
+                    onSuccess("Redeemed ${token.totalAmount} Sats" + " (Fees: ${token.fees} Sats)")
+                } else {
+                    onError(tree?.get("detail")?.asText()?.split('.')?.getOrNull(0) ?: "Cashu: Tokens already spent.")
+                }
+            }
+        } catch (e: Exception) {
+            onError("Token melt failure: " + e.message)
+        }
+    }
+}

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

@@ -0,0 +1,132 @@
+package com.vitorpamplona.amethyst.service
+
+import com.goterl.lazysodium.SodiumAndroid
+import com.goterl.lazysodium.utils.Key
+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 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 getSharedSecretNIP04(privateKey: ByteArray, pubKey: ByteArray): ByteArray =
+        secp256k1.pubKeyTweakMul(Hex.decode("02") + pubKey, privateKey).copyOfRange(1, 33)
+
+    fun encryptNIP04(msg: String, privateKey: ByteArray, pubKey: ByteArray): String {
+        val sharedSecret = getSharedSecretNIP04(privateKey, pubKey)
+        return encryptNIP04(msg, sharedSecret)
+    }
+
+    fun encryptNIP04(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 decryptNIP04(msg: String, privateKey: ByteArray, pubKey: ByteArray): String {
+        val sharedSecret = getSharedSecretNIP04(privateKey, pubKey)
+        return decryptNIP04(msg, sharedSecret)
+    }
+
+    fun decryptNIP04(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 encryptNIP24(msg: String, privateKey: ByteArray, pubKey: ByteArray): EncryptedInfo {
+        val sharedSecret = getSharedSecretNIP24(privateKey, pubKey)
+        return encryptNIP24(msg, sharedSecret)
+    }
+
+    fun encryptNIP24(msg: String, sharedSecret: ByteArray): EncryptedInfo {
+        val nonce = ByteArray(24)
+        random.nextBytes(nonce)
+
+        val cipher = SodiumAndroid().cryptoStreamXChaCha20Xor(
+            messageBytes = msg.toByteArray(),
+            nonce = nonce,
+            key = Key.fromBytes(sharedSecret)
+        )
+
+        val cipherBase64 = Base64.getEncoder().encodeToString(cipher)
+        val nonceBase64 = Base64.getEncoder().encodeToString(nonce)
+
+        return EncryptedInfo(
+            ciphertext = cipherBase64,
+            nonce = nonceBase64,
+            v = Nip44Version.XChaCha20.versionCode
+        )
+    }
+
+    fun decryptNIP24(encryptedInfo: EncryptedInfo, privateKey: ByteArray, pubKey: ByteArray): String? {
+        val sharedSecret = getSharedSecretNIP24(privateKey, pubKey)
+        return decryptNIP24(encryptedInfo, sharedSecret)
+    }
+
+    fun decryptNIP24(encryptedInfo: EncryptedInfo, sharedSecret: ByteArray): String? {
+        return SodiumAndroid().cryptoStreamXChaCha20Xor(
+            messageBytes = Base64.getDecoder().decode(encryptedInfo.ciphertext),
+            nonce = Base64.getDecoder().decode(encryptedInfo.nonce),
+            key = Key.fromBytes(sharedSecret)
+        )?.decodeToString()
+    }
+
+    /**
+     * @return 32B shared secret
+     */
+    fun getSharedSecretNIP24(privateKey: ByteArray, pubKey: ByteArray): ByteArray =
+        sha256(secp256k1.pubKeyTweakMul(Hex.decode("02") + pubKey, privateKey).copyOfRange(1, 33))
+}
+
+data class EncryptedInfo(val ciphertext: String, val nonce: String, val v: Int)
+
+enum class Nip44Version(val versionCode: Int) {
+    Reserved(0),
+    XChaCha20(1)
+}

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(
@@ -16,15 +15,16 @@ class FileHeader(
     val size: Int,
     val dim: String?,
     val blurHash: String?,
-    val description: String? = null
+    val description: String? = null,
+    val sensitiveContent: Boolean = false
 ) {
     companion object {
-        suspend fun prepare(fileUrl: String, mimeType: String?, description: String?, onReady: (FileHeader) -> Unit, onError: () -> Unit) {
+        suspend fun prepare(fileUrl: String, mimeType: String?, description: String?, sensitiveContent: Boolean, onReady: (FileHeader) -> Unit, onError: () -> Unit) {
             try {
                 val imageData: ByteArray? = ImageDownloader().waitAndGetImage(fileUrl)
 
                 if (imageData != null) {
-                    prepare(imageData, fileUrl, mimeType, description, onReady, onError)
+                    prepare(imageData, fileUrl, mimeType, description, sensitiveContent, onReady, onError)
                 } else {
                     onError()
                 }
@@ -39,13 +39,12 @@ class FileHeader(
             fileUrl: String,
             mimeType: String?,
             description: String?,
+            sensitiveContent: Boolean,
             onReady: (FileHeader) -> Unit,
             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) {
@@ -79,7 +78,7 @@ class FileHeader(
                     Pair(null, null)
                 }
 
-                onReady(FileHeader(fileUrl, mimeType, hash, size, dim, blurHash, description))
+                onReady(FileHeader(fileUrl, mimeType, hash, size, dim, blurHash, description, sensitiveContent))
             } catch (e: Exception) {
                 Log.e("ImageDownload", "Couldn't convert image in to File Header: ${e.message}")
                 onError()

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

@@ -0,0 +1,23 @@
+package com.vitorpamplona.amethyst.service
+
+object HexValidator {
+
+    private fun isHex2(c: Char): Boolean {
+        return when (c) {
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'A', 'B', 'C', 'D', 'E', 'F', ' ' -> true
+            else -> false
+        }
+    }
+
+    fun isHex(hex: String?): Boolean {
+        if (hex == null) return false
+        var isHex = true
+        for (c in hex.toCharArray()) {
+            if (!isHex2(c)) {
+                isHex = false
+                break
+            }
+        }
+        return isHex
+    }
+}

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/LocationUtil.kt

@@ -0,0 +1,79 @@
+package com.vitorpamplona.amethyst.service
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.location.Geocoder
+import android.location.Location
+import android.location.LocationListener
+import android.location.LocationManager
+import android.os.HandlerThread
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.mutableStateOf
+import kotlinx.coroutines.flow.MutableStateFlow
+
+class LocationUtil(context: Context) {
+    companion object {
+        const val MIN_TIME: Long = 1000L
+        const val MIN_DISTANCE: Float = 0.0f
+    }
+
+    private val locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
+    private var locationListener: LocationListener? = null
+
+    val locationStateFlow = MutableStateFlow<Location>(Location(LocationManager.NETWORK_PROVIDER))
+    val providerState = mutableStateOf(false)
+    val isStart: MutableState<Boolean> = mutableStateOf(false)
+
+    private val locHandlerThread = HandlerThread("LocationUtil Thread")
+
+    init {
+        locHandlerThread.start()
+    }
+
+    @SuppressLint("MissingPermission")
+    fun start(minTimeMs: Long = MIN_TIME, minDistanceM: Float = MIN_DISTANCE) {
+        locationListener().let {
+            locationListener = it
+            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, minTimeMs, minDistanceM, it, locHandlerThread.looper)
+        }
+        providerState.value = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
+        isStart.value = true
+    }
+
+    fun stop() {
+        locationListener?.let {
+            locationManager.removeUpdates(it)
+        }
+        isStart.value = false
+    }
+
+    private fun locationListener() = object : LocationListener {
+        override fun onLocationChanged(location: Location) {
+            locationStateFlow.value = location
+        }
+
+        override fun onProviderEnabled(provider: String) {
+            providerState.value = true
+        }
+
+        override fun onProviderDisabled(provider: String) {
+            providerState.value = false
+        }
+    }
+}
+
+class ReverseGeoLocationUtil {
+    fun execute(
+        location: Location,
+        context: Context
+    ): String? {
+        return try {
+            Geocoder(context).getFromLocation(location.latitude, location.longitude, 1)?.firstOrNull()?.let { address ->
+                listOfNotNull(address.locality ?: address.subAdminArea, address.countryCode).joinToString(", ")
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+            return null
+        }
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/service/Nip05Verifier.kt

@@ -19,6 +19,9 @@ class Nip05Verifier() {
         if (parts.size == 2) {
             return "https://${parts[1]}/.well-known/nostr.json?name=${parts[0]}"
         }
+        if (parts.size == 1) {
+            return "https://${parts[0]}/.well-known/nostr.json?name=_"
+        }
 
         return null
     }
@@ -31,7 +34,7 @@ class Nip05Verifier() {
     }
 
     private suspend fun fetchNip05JsonSuspend(nip05: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
-        // checkNotInMainThread()
+        checkNotInMainThread()
 
         val url = assembleUrl(nip05)
 
@@ -49,6 +52,8 @@ class Nip05Verifier() {
 
                 HttpClient.getHttpClient().newCall(request).enqueue(object : Callback {
                     override fun onResponse(call: Call, response: Response) {
+                        checkNotInMainThread()
+
                         response.use {
                             if (it.isSuccessful) {
                                 onSuccess(it.body.string())
@@ -71,13 +76,15 @@ class Nip05Verifier() {
 
     fun verifyNip05(nip05: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
         // check fails on tests
-        // checkNotInMainThread()
+        checkNotInMainThread()
 
         val mapper = jacksonObjectMapper()
 
         fetchNip05Json(
             nip05,
             onSuccess = {
+                checkNotInMainThread()
+
                 // NIP05 usernames are case insensitive, but JSON properties are not
                 // converts the json to lowercase and then tries to access the username via a
                 // lowercase version of the username.
@@ -88,7 +95,12 @@ class Nip05Verifier() {
                     null
                 }
 
-                val user = nip05.split("@")[0].lowercase()
+                val parts = nip05.split("@")
+                val user = if (parts.size == 2) {
+                    parts[0].lowercase()
+                } else {
+                    "_"
+                }
 
                 val hexKey = nip05url?.get("names")?.get(user)?.asText()
 

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

@@ -51,9 +51,9 @@ object NostrAccountDataSource : NostrDataSource("AccountData") {
         return TypedFilter(
             types = COMMON_FEED_TYPES,
             filter = JsonFilter(
-                kinds = listOf(BadgeProfilesEvent.kind),
+                kinds = listOf(BadgeProfilesEvent.kind, EmojiPackSelectionEvent.kind),
                 authors = listOf(account.userProfile().pubkeyHex),
-                limit = 1
+                limit = 10
             )
         )
     }

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

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.model.GiftWrapEvent
 import com.vitorpamplona.amethyst.service.model.PrivateDmEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.JsonFilter
@@ -24,7 +25,7 @@ object NostrChatroomDataSource : NostrDataSource("ChatroomFeed") {
             TypedFilter(
                 types = setOf(FeedType.PRIVATE_DMS),
                 filter = JsonFilter(
-                    kinds = listOf(PrivateDmEvent.kind),
+                    kinds = listOf(PrivateDmEvent.kind, GiftWrapEvent.kind),
                     authors = listOf(myPeer.pubkeyHex),
                     tags = mapOf("p" to listOf(account.userProfile().pubkeyHex))
                 )

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

@@ -4,6 +4,7 @@ import com.vitorpamplona.amethyst.model.Account
 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.GiftWrapEvent
 import com.vitorpamplona.amethyst.service.model.PrivateDmEvent
 import com.vitorpamplona.amethyst.service.relays.COMMON_FEED_TYPES
 import com.vitorpamplona.amethyst.service.relays.EOSEAccount
@@ -20,7 +21,7 @@ object NostrChatroomListDataSource : NostrDataSource("MailBoxFeed") {
     fun createMessagesToMeFilter() = TypedFilter(
         types = setOf(FeedType.PRIVATE_DMS),
         filter = JsonFilter(
-            kinds = listOf(PrivateDmEvent.kind),
+            kinds = listOf(PrivateDmEvent.kind, GiftWrapEvent.kind),
             tags = mapOf("p" to listOf(account.userProfile().pubkeyHex)),
             since = latestEOSEs.users[account.userProfile()]?.followList?.get(chatRoomList)?.relayList
         )
@@ -44,17 +45,23 @@ 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(
@@ -66,15 +73,17 @@ 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(
                     kinds = listOf(ChannelMessageEvent.kind),
                     tags = mapOf("e" to listOf(it)),
                     since = latestEOSEs.users[account.userProfile()]?.followList?.get(chatRoomList)?.relayList,
-                    limit = 25 // Remember to consider spam that is being removed from the UI
+                    limit = 50 // Remember to consider spam that is being removed from the UI
                 )
             )
         }

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

@@ -0,0 +1,41 @@
+package com.vitorpamplona.amethyst.service
+
+import com.vitorpamplona.amethyst.model.AddressableNote
+import com.vitorpamplona.amethyst.service.model.CommunityDefinitionEvent
+import com.vitorpamplona.amethyst.service.model.CommunityPostApprovalEvent
+import com.vitorpamplona.amethyst.service.relays.COMMON_FEED_TYPES
+import com.vitorpamplona.amethyst.service.relays.JsonFilter
+import com.vitorpamplona.amethyst.service.relays.TypedFilter
+
+object NostrCommunityDataSource : NostrDataSource("SingleCommunityFeed") {
+    private var communityToWatch: AddressableNote? = null
+
+    private fun createLoadCommunityFilter(): TypedFilter? {
+        val myCommunityToWatch = communityToWatch ?: return null
+
+        val community = myCommunityToWatch.event as? CommunityDefinitionEvent ?: return null
+
+        return TypedFilter(
+            types = COMMON_FEED_TYPES,
+            filter = JsonFilter(
+                authors = community.moderators().map { it.key }.plus(listOfNotNull(myCommunityToWatch.author?.pubkeyHex)),
+                tags = mapOf(
+                    "a" to listOf(myCommunityToWatch.address.toTag())
+                ),
+                kinds = listOf(CommunityPostApprovalEvent.kind),
+                limit = 500
+            )
+        )
+    }
+
+    val loadCommunityChannel = requestNewChannel()
+
+    override fun updateChannelFilters() {
+        loadCommunityChannel.typedFilters = listOfNotNull(createLoadCommunityFilter()).ifEmpty { null }
+    }
+
+    fun loadCommunity(note: AddressableNote?) {
+        communityToWatch = note
+        invalidateFilters()
+    }
+}

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

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.service
 
 import android.util.Log
 import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.TimeUtils
 import com.vitorpamplona.amethyst.service.model.*
 import com.vitorpamplona.amethyst.service.model.Event
 import com.vitorpamplona.amethyst.service.relays.Client
@@ -12,7 +13,6 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
-import java.util.Date
 import java.util.UUID
 import kotlin.Error
 
@@ -57,7 +57,7 @@ abstract class NostrDataSource(val debugName: String) {
 
             if (type == Relay.Type.EOSE && channel != null) {
                 // updates a per subscripton since date
-                subscriptions[channel]?.updateEOSE(Date().time / 1000, relay.url)
+                subscriptions[channel]?.updateEOSE(TimeUtils.now(), relay.url)
             }
         }
 

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

@@ -0,0 +1,212 @@
+package com.vitorpamplona.amethyst.service
+
+import com.vitorpamplona.amethyst.model.Account
+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.CommunityPostApprovalEvent
+import com.vitorpamplona.amethyst.service.model.LiveActivitiesChatMessageEvent
+import com.vitorpamplona.amethyst.service.model.LiveActivitiesEvent
+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
+
+object NostrDiscoveryDataSource : NostrDataSource("DiscoveryFeed") {
+    lateinit var account: Account
+
+    val latestEOSEs = EOSEAccount()
+
+    fun createLiveStreamFilter(): TypedFilter {
+        val follows = account.selectedUsersFollowList(account.defaultDiscoveryFollowList)
+
+        val followKeys = follows?.map {
+            it.substring(0, 8)
+        }
+
+        return TypedFilter(
+            types = setOf(FeedType.GLOBAL),
+            filter = JsonFilter(
+                authors = followKeys,
+                kinds = listOf(LiveActivitiesChatMessageEvent.kind, LiveActivitiesEvent.kind),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createPublicChatFilter(): TypedFilter {
+        val follows = account.selectedUsersFollowList(account.defaultDiscoveryFollowList)
+
+        val followKeys = follows?.map {
+            it.substring(0, 8)
+        }
+
+        return TypedFilter(
+            types = setOf(FeedType.PUBLIC_CHATS),
+            filter = JsonFilter(
+                authors = followKeys,
+                kinds = listOf(ChannelCreateEvent.kind, ChannelMetadataEvent.kind, ChannelMessageEvent.kind),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createCommunitiesFilter(): TypedFilter {
+        val follows = account.selectedUsersFollowList(account.defaultDiscoveryFollowList)
+
+        val followKeys = follows?.map {
+            it.substring(0, 8)
+        }
+
+        return TypedFilter(
+            types = setOf(FeedType.GLOBAL),
+            filter = JsonFilter(
+                authors = followKeys,
+                kinds = listOf(CommunityDefinitionEvent.kind, CommunityPostApprovalEvent.kind),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createLiveStreamTagsFilter(): TypedFilter? {
+        val hashToLoad = account.selectedTagsFollowList(account.defaultDiscoveryFollowList)
+
+        if (hashToLoad.isNullOrEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.GLOBAL),
+            filter = JsonFilter(
+                kinds = listOf(LiveActivitiesChatMessageEvent.kind, LiveActivitiesEvent.kind),
+                tags = mapOf(
+                    "t" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createLiveStreamGeohashesFilter(): TypedFilter? {
+        val hashToLoad = account.selectedGeohashesFollowList(account.defaultDiscoveryFollowList)
+
+        if (hashToLoad.isNullOrEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.GLOBAL),
+            filter = JsonFilter(
+                kinds = listOf(LiveActivitiesChatMessageEvent.kind, LiveActivitiesEvent.kind),
+                tags = mapOf(
+                    "g" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createPublicChatsTagsFilter(): TypedFilter? {
+        val hashToLoad = account.selectedTagsFollowList(account.defaultDiscoveryFollowList)
+
+        if (hashToLoad.isNullOrEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.PUBLIC_CHATS),
+            filter = JsonFilter(
+                kinds = listOf(ChannelCreateEvent.kind, ChannelMetadataEvent.kind, ChannelMessageEvent.kind),
+                tags = mapOf(
+                    "t" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createPublicChatsGeohashesFilter(): TypedFilter? {
+        val hashToLoad = account.selectedGeohashesFollowList(account.defaultDiscoveryFollowList)
+
+        if (hashToLoad.isNullOrEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.PUBLIC_CHATS),
+            filter = JsonFilter(
+                kinds = listOf(ChannelCreateEvent.kind, ChannelMetadataEvent.kind, ChannelMessageEvent.kind),
+                tags = mapOf(
+                    "g" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createCommunitiesTagsFilter(): TypedFilter? {
+        val hashToLoad = account.selectedTagsFollowList(account.defaultDiscoveryFollowList)
+
+        if (hashToLoad.isNullOrEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.GLOBAL),
+            filter = JsonFilter(
+                kinds = listOf(CommunityDefinitionEvent.kind, CommunityPostApprovalEvent.kind),
+                tags = mapOf(
+                    "t" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    fun createCommunitiesGeohashesFilter(): TypedFilter? {
+        val hashToLoad = account.selectedGeohashesFollowList(account.defaultDiscoveryFollowList)
+
+        if (hashToLoad.isNullOrEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.GLOBAL),
+            filter = JsonFilter(
+                kinds = listOf(CommunityDefinitionEvent.kind, CommunityPostApprovalEvent.kind),
+                tags = mapOf(
+                    "g" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 300,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultDiscoveryFollowList)?.relayList
+            )
+        )
+    }
+
+    val discoveryFeedChannel = requestNewChannel() { time, relayUrl ->
+        latestEOSEs.addOrUpdate(account.userProfile(), account.defaultDiscoveryFollowList, relayUrl, time)
+    }
+
+    override fun updateChannelFilters() {
+        discoveryFeedChannel.typedFilters = listOfNotNull(
+            createLiveStreamFilter(),
+            createPublicChatFilter(),
+            createCommunitiesFilter(),
+            createLiveStreamTagsFilter(),
+            createPublicChatsTagsFilter(),
+            createCommunitiesTagsFilter(),
+            createCommunitiesGeohashesFilter(),
+            createPublicChatsGeohashesFilter(),
+            createLiveStreamGeohashesFilter()
+        ).ifEmpty { null }
+    }
+}

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

@@ -0,0 +1,46 @@
+package com.vitorpamplona.amethyst.service
+
+import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
+import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
+import com.vitorpamplona.amethyst.service.model.ClassifiedsEvent
+import com.vitorpamplona.amethyst.service.model.HighlightEvent
+import com.vitorpamplona.amethyst.service.model.LiveActivitiesChatMessageEvent
+import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
+import com.vitorpamplona.amethyst.service.model.PollNoteEvent
+import com.vitorpamplona.amethyst.service.model.TextNoteEvent
+import com.vitorpamplona.amethyst.service.relays.COMMON_FEED_TYPES
+import com.vitorpamplona.amethyst.service.relays.JsonFilter
+import com.vitorpamplona.amethyst.service.relays.TypedFilter
+
+object NostrGeohashDataSource : NostrDataSource("SingleGeoHashFeed") {
+    private var geohashToWatch: String? = null
+
+    fun createLoadHashtagFilter(): TypedFilter? {
+        val hashToLoad = geohashToWatch ?: return null
+
+        return TypedFilter(
+            types = COMMON_FEED_TYPES,
+            filter = JsonFilter(
+                tags = mapOf(
+                    "g" to listOf(
+                        hashToLoad
+                    )
+                ),
+                kinds = listOf(TextNoteEvent.kind, ChannelMessageEvent.kind, LongTextNoteEvent.kind, PollNoteEvent.kind, LiveActivitiesChatMessageEvent.kind, ClassifiedsEvent.kind, HighlightEvent.kind, AudioTrackEvent.kind),
+                limit = 200
+            )
+        )
+    }
+
+    val loadGeohashChannel = requestNewChannel()
+
+    override fun updateChannelFilters() {
+        loadGeohashChannel.typedFilters = listOfNotNull(createLoadHashtagFilter()).ifEmpty { null }
+    }
+
+    fun loadHashtag(tag: String?) {
+        geohashToWatch = tag
+
+        invalidateFilters()
+    }
+}

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

@@ -1,28 +0,0 @@
-package com.vitorpamplona.amethyst.service
-
-import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
-import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
-import com.vitorpamplona.amethyst.service.model.HighlightEvent
-import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
-import com.vitorpamplona.amethyst.service.model.PinListEvent
-import com.vitorpamplona.amethyst.service.model.PollNoteEvent
-import com.vitorpamplona.amethyst.service.model.TextNoteEvent
-import com.vitorpamplona.amethyst.service.relays.FeedType
-import com.vitorpamplona.amethyst.service.relays.JsonFilter
-import com.vitorpamplona.amethyst.service.relays.TypedFilter
-
-object NostrGlobalDataSource : NostrDataSource("GlobalFeed") {
-    fun createGlobalFilter() = TypedFilter(
-        types = setOf(FeedType.GLOBAL),
-        filter = JsonFilter(
-            kinds = listOf(TextNoteEvent.kind, PollNoteEvent.kind, ChannelMessageEvent.kind, AudioTrackEvent.kind, PinListEvent.kind, LongTextNoteEvent.kind, HighlightEvent.kind),
-            limit = 200
-        )
-    )
-
-    val globalFeedChannel = requestNewChannel()
-
-    override fun updateChannelFilters() {
-        globalFeedChannel.typedFilters = listOf(createGlobalFilter()).ifEmpty { null }
-    }
-}

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

@@ -1,7 +1,11 @@
 package com.vitorpamplona.amethyst.service
 
 import androidx.compose.ui.text.capitalize
+import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
+import com.vitorpamplona.amethyst.service.model.ClassifiedsEvent
+import com.vitorpamplona.amethyst.service.model.HighlightEvent
+import com.vitorpamplona.amethyst.service.model.LiveActivitiesChatMessageEvent
 import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
 import com.vitorpamplona.amethyst.service.model.PollNoteEvent
 import com.vitorpamplona.amethyst.service.model.TextNoteEvent
@@ -26,7 +30,7 @@ object NostrHashtagDataSource : NostrDataSource("SingleHashtagFeed") {
                         hashToLoad.capitalize()
                     )
                 ),
-                kinds = listOf(TextNoteEvent.kind, ChannelMessageEvent.kind, LongTextNoteEvent.kind, LongTextNoteEvent.kind, PollNoteEvent.kind),
+                kinds = listOf(TextNoteEvent.kind, ChannelMessageEvent.kind, LongTextNoteEvent.kind, PollNoteEvent.kind, LiveActivitiesChatMessageEvent.kind, ClassifiedsEvent.kind, HighlightEvent.kind, AudioTrackEvent.kind),
                 limit = 200
             )
         )

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

@@ -3,6 +3,8 @@ package com.vitorpamplona.amethyst.service
 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
@@ -51,13 +53,13 @@ object NostrHomeDataSource : NostrDataSource("HomeFeed") {
     }
 
     fun createFollowAccountsFilter(): TypedFilter {
-        val follows = account.selectedUsersFollowList(account.defaultHomeFollowList) ?: emptySet()
+        val follows = account.selectedUsersFollowList(account.defaultHomeFollowList)
 
-        val followKeys = follows.map {
+        val followKeys = follows?.map {
             it.substring(0, 6)
         }
 
-        val followSet = followKeys.plus(account.userProfile().pubkeyHex.substring(0, 6))
+        val followSet = followKeys?.plus(account.userProfile().pubkeyHex.substring(0, 6))
 
         return TypedFilter(
             types = setOf(FeedType.FOLLOWS),
@@ -66,6 +68,7 @@ object NostrHomeDataSource : NostrDataSource("HomeFeed") {
                     TextNoteEvent.kind,
                     RepostEvent.kind,
                     GenericRepostEvent.kind,
+                    ClassifiedsEvent.kind,
                     LongTextNoteEvent.kind,
                     PollNoteEvent.kind,
                     HighlightEvent.kind,
@@ -89,7 +92,7 @@ object NostrHomeDataSource : NostrDataSource("HomeFeed") {
         return TypedFilter(
             types = setOf(FeedType.FOLLOWS),
             filter = JsonFilter(
-                kinds = listOf(TextNoteEvent.kind, LongTextNoteEvent.kind, HighlightEvent.kind, AudioTrackEvent.kind, PinListEvent.kind),
+                kinds = listOf(TextNoteEvent.kind, LongTextNoteEvent.kind, ClassifiedsEvent.kind, HighlightEvent.kind, AudioTrackEvent.kind, PinListEvent.kind),
                 tags = mapOf(
                     "t" to hashToLoad.map {
                         listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
@@ -101,11 +104,62 @@ object NostrHomeDataSource : NostrDataSource("HomeFeed") {
         )
     }
 
+    fun createFollowGeohashesFilter(): TypedFilter? {
+        val hashToLoad = account.selectedGeohashesFollowList(account.defaultHomeFollowList) ?: emptySet()
+
+        if (hashToLoad.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),
+                tags = mapOf(
+                    "g" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 100,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultHomeFollowList)?.relayList
+            )
+        )
+    }
+
+    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(),
+            createFollowGeohashesFilter()
+        ).ifEmpty { null }
     }
 }

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

@@ -9,7 +9,7 @@ import com.vitorpamplona.amethyst.service.relays.JsonFilter
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import fr.acinq.secp256k1.Hex
 
-object NostrSearchEventOrUserDataSource : NostrDataSource("SingleEventFeed") {
+object NostrSearchEventOrUserDataSource : NostrDataSource("SearchEventFeed") {
     private var searchString: String? = null
 
     private fun createAnythingWithIDFilter(): List<TypedFilter>? {
@@ -54,6 +54,28 @@ object NostrSearchEventOrUserDataSource : NostrDataSource("SingleEventFeed") {
             TypedFilter(
                 types = setOf(FeedType.SEARCH),
                 filter = JsonFilter(
+                    kinds = listOf(
+                        TextNoteEvent.kind, LongTextNoteEvent.kind, BadgeDefinitionEvent.kind,
+                        PeopleListEvent.kind, BookmarkListEvent.kind, AudioTrackEvent.kind, PinListEvent.kind,
+                        PollNoteEvent.kind, ChannelCreateEvent.kind
+                    ),
+                    search = mySearchString,
+                    limit = 100
+                )
+            ),
+            TypedFilter(
+                types = setOf(FeedType.SEARCH),
+                filter = JsonFilter(
+                    kinds = listOf(
+                        ChannelMetadataEvent.kind,
+                        ClassifiedsEvent.kind,
+                        CommunityDefinitionEvent.kind,
+                        EmojiPackEvent.kind,
+                        HighlightEvent.kind,
+                        LiveActivitiesEvent.kind,
+                        PollNoteEvent.kind,
+                        NNSEvent.kind
+                    ),
                     search = mySearchString,
                     limit = 100
                 )

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

@@ -71,7 +71,7 @@ object NostrSingleChannelDataSource : NostrDataSource("SingleChannelFeed") {
                     filter = JsonFilter(
                         kinds = listOf(aTag.kind),
                         tags = mapOf("d" to listOf(aTag.dTag)),
-                        authors = listOf(aTag.pubKeyHex.substring(0, 8))
+                        authors = listOf(aTag.pubKeyHex)
                     )
                 )
             }

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

@@ -12,7 +12,7 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
     private var eventsToWatch = setOf<Note>()
     private var addressesToWatch = setOf<Note>()
 
-    private fun createTagToAddressFilter(): List<TypedFilter>? {
+    private fun createReactionsToWatchInAddressFilter(): List<TypedFilter>? {
         val addressesToWatch = eventsToWatch.filter { it.address() != null } + addressesToWatch
 
         if (addressesToWatch.isEmpty()) {
@@ -25,15 +25,19 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
                     types = COMMON_FEED_TYPES,
                     filter = JsonFilter(
                         kinds = listOf(
-                            TextNoteEvent.kind, LongTextNoteEvent.kind,
-                            ReactionEvent.kind, RepostEvent.kind, GenericRepostEvent.kind, ReportEvent.kind,
-                            LnZapEvent.kind, LnZapRequestEvent.kind,
-                            BadgeAwardEvent.kind, BadgeDefinitionEvent.kind, BadgeProfilesEvent.kind,
-                            PollNoteEvent.kind, AudioTrackEvent.kind, PinListEvent.kind,
-                            PeopleListEvent.kind, BookmarkListEvent.kind
+                            TextNoteEvent.kind,
+                            ReactionEvent.kind,
+                            RepostEvent.kind,
+                            GenericRepostEvent.kind,
+                            ReportEvent.kind,
+                            LnZapEvent.kind,
+                            PollNoteEvent.kind,
+                            CommunityPostApprovalEvent.kind,
+                            LiveActivitiesChatMessageEvent.kind
                         ),
                         tags = mapOf("a" to listOf(aTag.toTag())),
-                        since = it.lastReactionsDownloadTime
+                        since = it.lastReactionsDownloadTime,
+                        limit = 1000 // Max amount of "replies" to download on a specific event.
                     )
                 )
             }
@@ -49,14 +53,26 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
 
         return addressesToWatch.mapNotNull {
             it.address()?.let { aTag ->
-                TypedFilter(
-                    types = COMMON_FEED_TYPES,
-                    filter = JsonFilter(
-                        kinds = listOf(aTag.kind),
-                        tags = mapOf("d" to listOf(aTag.dTag)),
-                        authors = listOf(aTag.pubKeyHex.substring(0, 8))
+                if (aTag.kind < 25000 && aTag.dTag.isBlank()) {
+                    TypedFilter(
+                        types = COMMON_FEED_TYPES,
+                        filter = JsonFilter(
+                            kinds = listOf(aTag.kind),
+                            authors = listOf(aTag.pubKeyHex),
+                            limit = 1000 // Max amount of "replies" to download on a specific event.
+                        )
                     )
-                )
+                } else {
+                    TypedFilter(
+                        types = COMMON_FEED_TYPES,
+                        filter = JsonFilter(
+                            kinds = listOf(aTag.kind),
+                            tags = mapOf("d" to listOf(aTag.dTag)),
+                            authors = listOf(aTag.pubKeyHex),
+                            limit = 1000 // Max amount of "replies" to download on a specific event.
+                        )
+                    )
+                }
             }
         }
     }
@@ -74,20 +90,16 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
                 filter = JsonFilter(
                     kinds = listOf(
                         TextNoteEvent.kind,
-                        LongTextNoteEvent.kind,
                         ReactionEvent.kind,
                         RepostEvent.kind,
                         GenericRepostEvent.kind,
                         ReportEvent.kind,
                         LnZapEvent.kind,
-                        LnZapRequestEvent.kind,
-                        PollNoteEvent.kind,
-                        HighlightEvent.kind,
-                        AudioTrackEvent.kind,
-                        PinListEvent.kind
+                        PollNoteEvent.kind
                     ),
                     tags = mapOf("e" to listOf(it.idHex)),
-                    since = it.lastReactionsDownloadTime
+                    since = it.lastReactionsDownloadTime,
+                    limit = 1000 // Max amount of "replies" to download on a specific event.
                 )
             )
         }
@@ -122,6 +134,8 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
     }
 
     val singleEventChannel = requestNewChannel { time, relayUrl ->
+        checkNotInMainThread()
+
         eventsToWatch.forEach {
             val eose = it.lastReactionsDownloadTime[relayUrl]
             if (eose == null) {
@@ -140,7 +154,7 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
         val reactions = createRepliesAndReactionsFilter()
         val missing = createLoadEventsIfNotLoadedFilter()
         val addresses = createAddressFilter()
-        val addressReactions = createTagToAddressFilter()
+        val addressReactions = createReactionsToWatchInAddressFilter()
 
         singleEventChannel.typedFilters = listOfNotNull(missing, addresses, reactions, addressReactions).flatten().ifEmpty { null }
     }
@@ -159,16 +173,16 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
         }
     }
 
-    fun addAddress(aTag: Note) {
-        if (!addressesToWatch.contains(aTag)) {
-            addressesToWatch = addressesToWatch.plus(aTag)
+    fun addAddress(addressableNote: Note) {
+        if (!addressesToWatch.contains(addressableNote)) {
+            addressesToWatch = addressesToWatch.plus(addressableNote)
             invalidateFilters()
         }
     }
 
-    fun removeAddress(aTag: Note) {
-        if (addressesToWatch.contains(aTag)) {
-            addressesToWatch = addressesToWatch.minus(aTag)
+    fun removeAddress(addressableNote: Note) {
+        if (addressesToWatch.contains(addressableNote)) {
+            addressesToWatch = addressesToWatch.minus(addressableNote)
             invalidateFilters()
         }
     }

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
             )
         )
     }
@@ -41,14 +45,41 @@ 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()
+    fun createFollowGeohashesFilter(): TypedFilter? {
+        val hashToLoad = account.selectedGeohashesFollowList(account.defaultStoriesFollowList)
+
+        if (hashToLoad.isNullOrEmpty()) return null
+
+        return TypedFilter(
+            types = setOf(FeedType.GLOBAL),
+            filter = JsonFilter(
+                kinds = listOf(FileHeaderEvent.kind, FileStorageHeaderEvent.kind),
+                tags = mapOf(
+                    "g" to hashToLoad.map {
+                        listOf(it, it.lowercase(), it.uppercase(), it.capitalize())
+                    }.flatten()
+                ),
+                limit = 100,
+                since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultStoriesFollowList)?.relayList
+            )
+        )
+    }
+
+    val videoFeedChannel = requestNewChannel() { time, relayUrl ->
+        latestEOSEs.addOrUpdate(account.userProfile(), account.defaultStoriesFollowList, relayUrl, time)
+    }
 
     override fun updateChannelFilters() {
-        videoFeedChannel.typedFilters = listOfNotNull(createContextualFilter(), createFollowTagsFilter()).ifEmpty { null }
+        videoFeedChannel.typedFilters = listOfNotNull(
+            createContextualFilter(),
+            createFollowTagsFilter(),
+            createFollowGeohashesFilter()
+        ).ifEmpty { null }
     }
 }

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

@@ -0,0 +1,42 @@
+package com.vitorpamplona.amethyst.service
+
+import android.util.Log
+import android.util.LruCache
+import androidx.compose.runtime.Immutable
+import com.vitorpamplona.amethyst.BuildConfig
+import okhttp3.Request
+
+@Immutable
+data class OnlineCheckResult(val timeInMs: Long, val online: Boolean)
+
+object OnlineChecker {
+    val checkOnlineCache = LruCache<String, OnlineCheckResult>(100)
+    val fiveMinutes = 1000 * 60 * 5
+
+    fun isOnline(url: String?): Boolean {
+        checkNotInMainThread()
+
+        if (url.isNullOrBlank()) return false
+        if ((checkOnlineCache.get(url)?.timeInMs ?: 0) > System.currentTimeMillis() - fiveMinutes) {
+            return checkOnlineCache.get(url).online
+        }
+
+        return try {
+            val request = Request.Builder()
+                .header("User-Agent", "Amethyst/${BuildConfig.VERSION_NAME}")
+                .url(url)
+                .get()
+                .build()
+
+            val result = HttpClient.getHttpClient().newCall(request).execute().use {
+                it.isSuccessful
+            }
+            checkOnlineCache.put(url, OnlineCheckResult(System.currentTimeMillis(), result))
+            result
+        } catch (e: Exception) {
+            checkOnlineCache.put(url, OnlineCheckResult(System.currentTimeMillis(), false))
+            Log.e("LiveActivities", "Failed to check streaming url $url", e)
+            false
+        }
+    }
+}

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

@@ -0,0 +1,75 @@
+package com.vitorpamplona.amethyst.service
+
+import com.goterl.lazysodium.Sodium
+import com.goterl.lazysodium.SodiumAndroid
+import com.goterl.lazysodium.utils.Key
+
+fun Sodium.crypto_stream_xchacha20_xor_ic(
+    cipher: ByteArray,
+    message: ByteArray,
+    messageLen: Long,
+    nonce: ByteArray,
+    ic: Long,
+    key: ByteArray
+): Int {
+    /**
+     * C++ Code:
+     *
+     * unsigned char k2[crypto_core_hchacha20_OUTPUTBYTES];
+     * crypto_core_hchacha20(k2, n, k, NULL);
+     * return crypto_stream_chacha20_xor_ic(
+     * c, m, mlen, n + crypto_core_hchacha20_INPUTBYTES, ic, k2);
+     */
+    val k2 = ByteArray(32)
+
+    val nonceChaCha = nonce.drop(16).toByteArray()
+    assert(nonceChaCha.size == 8)
+
+    crypto_core_hchacha20(k2, nonce, key, null)
+    return crypto_stream_chacha20_xor_ic(
+        cipher,
+        message,
+        messageLen,
+        nonceChaCha,
+        ic,
+        k2
+    )
+}
+
+fun Sodium.crypto_stream_xchacha20_xor(
+    cipher: ByteArray,
+    message: ByteArray,
+    messageLen: Long,
+    nonce: ByteArray,
+    key: ByteArray
+): Int {
+    return crypto_stream_xchacha20_xor_ic(cipher, message, messageLen, nonce, 0, key)
+}
+
+fun SodiumAndroid.cryptoStreamXChaCha20Xor(
+    cipher: ByteArray,
+    message: ByteArray,
+    messageLen: Long,
+    nonce: ByteArray,
+    key: ByteArray
+): Boolean {
+    require(!(messageLen < 0 || messageLen > message.size)) { "messageLen out of bounds: $messageLen" }
+    return crypto_stream_xchacha20_xor(
+        cipher,
+        message,
+        messageLen,
+        nonce,
+        key
+    ) == 0
+}
+
+fun SodiumAndroid.cryptoStreamXChaCha20Xor(
+    messageBytes: ByteArray,
+    nonce: ByteArray,
+    key: Key
+): ByteArray? {
+    val mLen = messageBytes.size
+    val cipher = ByteArray(mLen)
+    val sucessful = cryptoStreamXChaCha20Xor(cipher, messageBytes, mLen.toLong(), nonce, key.asBytes)
+    return if (sucessful) cipher else null
+}

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

@@ -1,10 +1,12 @@
 package com.vitorpamplona.amethyst.service
 
+import com.vitorpamplona.amethyst.ui.actions.ImmutableListOfLists
+
 fun String.isUTF16Char(pos: Int): Boolean {
     return Character.charCount(this.codePointAt(pos)) == 2
 }
 
-fun String.firstFullChar(): String {
+fun String.firstFullCharOld(): String {
     return when (this.length) {
         0, 1 -> return this
         2, 3 -> return if (isUTF16Char(0)) this.take(2) else this.take(1)
@@ -21,3 +23,85 @@ fun String.firstFullChar(): String {
         }
     }
 }
+
+fun String.firstFullChar(): String {
+    var isInJoin = false
+    var hasHadSecondChance = false
+    var start = 0
+    var previousCharLength = 0
+    var next: Int
+    var codePoint: Int
+
+    var i = 0
+
+    while (i < this.length) {
+        codePoint = codePointAt(i)
+
+        // Skips if it starts with the join char 0x200D
+        if (codePoint == 0x200D && previousCharLength == 0) {
+            next = offsetByCodePoints(i, 1)
+            start = next
+        } else {
+            // If join, searches for the next char
+            if (codePoint == 0xFE0F) {
+            } else if (codePoint == 0x200D) {
+                isInJoin = true
+            } else {
+                // stops when two chars are not joined together
+                if (previousCharLength > 0 && !isInJoin) {
+                    if (Character.charCount(codePoint) == 1 || hasHadSecondChance) {
+                        break
+                    } else {
+                        hasHadSecondChance = true
+                    }
+                } else {
+                    hasHadSecondChance = false
+                }
+
+                isInJoin = false
+            }
+
+            // next char to evaluate
+            next = offsetByCodePoints(i, 1)
+            previousCharLength += (next - i)
+        }
+
+        i = next
+    }
+
+    // if ends in join, then seachers backwards until a char is found.
+    if (isInJoin) {
+        i = previousCharLength - 1
+        while (i > 0) {
+            if (this[i].code == 0x200D) {
+                previousCharLength -= 1
+            } else {
+                break
+            }
+
+            i -= 1
+        }
+    }
+
+    return substring(start, start + previousCharLength)
+}
+
+fun String.firstFullCharOrEmoji(tags: ImmutableListOfLists<String>): String {
+    if (length <= 2) {
+        return firstFullChar()
+    }
+
+    if (this[0] == ':') {
+        // makes sure an emoji exists
+        val emojiParts = this.split(":", limit = 3)
+        if (emojiParts.size >= 2) {
+            val emojiName = emojiParts[1]
+            val emojiUrl = tags.lists.firstOrNull() { it.size > 1 && it[1] == emojiName }?.getOrNull(2)
+            if (emojiUrl != null) {
+                return ":$emojiName:$emojiUrl"
+            }
+        }
+    }
+
+    return firstFullChar()
+}

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

@@ -0,0 +1,15 @@
+package com.vitorpamplona.amethyst.service.connectivitystatus
+
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.mutableStateOf
+
+object ConnectivityStatus {
+    private val onMobileData = mutableStateOf(false)
+    val isOnMobileData: MutableState<Boolean> = onMobileData
+
+    fun updateConnectivityStatus(isOnMobileData: Boolean, isOnWifi: Boolean) {
+        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
         )
@@ -176,7 +177,7 @@ class LightningAddressResolver() {
                                 null
                             }
 
-                            lnInvoice?.get("pr")?.asText()?.let { pr ->
+                            lnInvoice?.get("pr")?.asText()?.ifBlank { null }?.let { pr ->
                                 // Forces LN Invoice amount to be the requested amount.
                                 val invoiceAmount = LnInvoiceUtil.getAmountInSats(pr)
                                 if (invoiceAmount.multiply(BigDecimal(1000)).toLong() == BigDecimal(milliSats).toLong()) {

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

@@ -103,7 +103,7 @@ object LnInvoiceUtil {
         try {
             decodeUnlimitedLength(invoice) // checksum must match
         } catch (e: AddressFormatException) {
-            throw IllegalArgumentException("Cannot decode invoice", e)
+            throw IllegalArgumentException("Cannot decode invoice: $invoice", e)
         }
 
         val matcher = invoicePattern.matcher(invoice)

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.nip19.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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class AudioTrackEvent(
@@ -42,7 +42,7 @@ class AudioTrackEvent(
             cover: String? = null,
             subject: String? = null,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            createdAt: Long = TimeUtils.now()
         ): AudioTrackEvent {
             val tags = listOfNotNull(
                 listOf(MEDIA, media),
@@ -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/BaseTextNoteEvent.kt

@@ -113,7 +113,7 @@ open class BaseTextNoteEvent(
 
     fun tagsWithoutCitations(): List<String> {
         val repliesTo = replyTos()
-        val tagAddresses = taggedAddresses().map { it.toTag() }
+        val tagAddresses = taggedAddresses().filter { it.kind != CommunityDefinitionEvent.kind }.map { it.toTag() }
         if (repliesTo.isEmpty() && tagAddresses.isEmpty()) return emptyList()
 
         val citations = findCitations()

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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class BookmarkListEvent(
@@ -30,9 +30,9 @@ class BookmarkListEvent(
             privAddresses: List<ATag>? = null,
 
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            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

@@ -3,9 +3,9 @@ package com.vitorpamplona.amethyst.service.model
 import android.util.Log
 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.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelCreateEvent(
@@ -26,7 +26,7 @@ class ChannelCreateEvent(
     companion object {
         const val kind = 40
 
-        fun create(channelInfo: ChannelData?, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ChannelCreateEvent {
+        fun create(channelInfo: ChannelData?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ChannelCreateEvent {
             val content = try {
                 if (channelInfo != null) {
                     gson.toJson(channelInfo)
@@ -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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelHideMessageEvent(
@@ -14,21 +14,27 @@ class ChannelHideMessageEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), IsInPublicChatChannel {
+    override fun channel() = tags.firstOrNull {
+        it.size > 3 && it[0] == "e" && it[3] == "root"
+    }?.get(1) ?: tags.firstOrNull {
+        it.size > 1 && it[0] == "e"
+    }?.get(1)
+
     fun eventsToHide() = tags.filter { it.firstOrNull() == "e" }.mapNotNull { it.getOrNull(1) }
 
     companion object {
         const val kind = 43
 
-        fun create(reason: String, messagesToHide: List<String>?, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ChannelHideMessageEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+        fun create(reason: String, messagesToHide: List<String>?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ChannelHideMessageEvent {
+            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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelMessageEvent(
@@ -14,9 +14,9 @@ class ChannelMessageEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : BaseTextNoteEvent(id, pubKey, createdAt, kind, tags, content, sig) {
+) : BaseTextNoteEvent(id, pubKey, createdAt, kind, tags, content, sig), IsInPublicChatChannel {
 
-    fun channel() = tags.firstOrNull {
+    override fun channel() = tags.firstOrNull {
         it.size > 3 && it[0] == "e" && it[3] == "root"
     }?.get(1) ?: tags.firstOrNull {
         it.size > 1 && it[0] == "e"
@@ -34,12 +34,13 @@ class ChannelMessageEvent(
             mentions: List<String>? = null,
             zapReceiver: String?,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000,
+            createdAt: Long = TimeUtils.now(),
             markAsSensitive: Boolean,
-            zapRaiserAmount: Long?
+            zapRaiserAmount: Long?,
+            geohash: String? = null
         ): ChannelMessageEvent {
             val content = message
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf(
                 listOf("e", channel, "", "root")
             )
@@ -58,10 +59,17 @@ class ChannelMessageEvent(
             zapRaiserAmount?.let {
                 tags.add(listOf("zapraiser", "$it"))
             }
+            geohash?.let {
+                tags.add(listOf("g", it))
+            }
 
             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())
         }
     }
 }
+
+interface IsInPublicChatChannel {
+    open fun channel(): String?
+}

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

@@ -3,9 +3,9 @@ package com.vitorpamplona.amethyst.service.model
 import android.util.Log
 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.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelMetadataEvent(
@@ -15,8 +15,9 @@ class ChannelMetadataEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
-    fun channel() = tags.firstOrNull { it.size > 1 && it[0] == "e" }?.get(1)
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), IsInPublicChatChannel {
+
+    override fun channel() = tags.firstOrNull { it.size > 1 && it[0] == "e" }?.get(1)
     fun channelInfo() =
         try {
             MetadataEvent.gson.fromJson(content, ChannelCreateEvent.ChannelData::class.java)
@@ -28,7 +29,7 @@ class ChannelMetadataEvent(
     companion object {
         const val kind = 41
 
-        fun create(newChannelInfo: ChannelCreateEvent.ChannelData?, originalChannelIdHex: String, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ChannelMetadataEvent {
+        fun create(newChannelInfo: ChannelCreateEvent.ChannelData?, originalChannelIdHex: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ChannelMetadataEvent {
             val content =
                 if (newChannelInfo != null) {
                     gson.toJson(newChannelInfo)
@@ -36,10 +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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class ChannelMuteUserEvent(
@@ -14,23 +14,28 @@ class ChannelMuteUserEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), IsInPublicChatChannel {
+    override fun channel() = tags.firstOrNull {
+        it.size > 3 && it[0] == "e" && it[3] == "root"
+    }?.get(1) ?: tags.firstOrNull {
+        it.size > 1 && it[0] == "e"
+    }?.get(1)
 
     fun usersToMute() = tags.filter { it.firstOrNull() == "p" }.mapNotNull { it.getOrNull(1) }
 
     companion object {
         const val kind = 44
 
-        fun create(reason: String, usersToMute: List<String>?, privateKey: ByteArray, createdAt: Long = Date().time / 1000): 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/ChatMessageEvent.kt

@@ -0,0 +1,72 @@
+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 ChatMessageEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: List<List<String>>,
+    content: String,
+    sig: HexKey
+) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
+    /**
+     * Recepients intended to receive this conversation
+     */
+    private fun recipientsPubKey() = tags.mapNotNull {
+        if (it.size > 1 && it[0] == "p") it[1] else null
+    }
+
+    fun replyTo() = tags.firstOrNull { it.size > 1 && it[0] == "e" }?.get(1)
+
+    companion object {
+        const val kind = 14
+
+        fun create(
+            msg: String,
+            to: List<String>? = null,
+            replyTos: List<String>? = null,
+            mentions: List<String>? = null,
+            zapReceiver: String? = null,
+            markAsSensitive: Boolean = false,
+            zapRaiserAmount: Long? = null,
+            geohash: String? = null,
+            privateKey: ByteArray,
+            createdAt: Long = TimeUtils.now()
+        ): ChatMessageEvent {
+            val content = msg
+            val tags = mutableListOf<List<String>>()
+            to?.forEach {
+                tags.add(listOf("p", it))
+            }
+            replyTos?.forEach {
+                tags.add(listOf("e", it))
+            }
+            mentions?.forEach {
+                tags.add(listOf("p", it, "", "mention"))
+            }
+            zapReceiver?.let {
+                tags.add(listOf("zap", it))
+            }
+            if (markAsSensitive) {
+                tags.add(listOf("content-warning", ""))
+            }
+            zapRaiserAmount?.let {
+                tags.add(listOf("zapraiser", "$it"))
+            }
+            geohash?.let {
+                tags.add(listOf("g", it))
+            }
+
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
+            val id = generateId(pubKey, createdAt, ClassifiedsEvent.kind, tags, content)
+            val sig = CryptoUtils.sign(id, privateKey)
+            return ChatMessageEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
+        }
+    }
+}

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

@@ -0,0 +1,77 @@
+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 ClassifiedsEvent(
+    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 title() = tags.firstOrNull { it.size > 1 && it[0] == "title" }?.get(1)
+    fun image() = tags.firstOrNull { it.size > 1 && it[0] == "image" }?.get(1)
+    fun summary() = tags.firstOrNull { it.size > 1 && it[0] == "summary" }?.get(1)
+    fun price() = tags.firstOrNull { it.size > 1 && it[0] == "price" }?.let {
+        Price(it[1], it.getOrNull(2), it.getOrNull(3))
+    }
+    fun location() = tags.firstOrNull { it.size > 1 && it[0] == "location" }?.get(1)
+
+    fun publishedAt() = try {
+        tags.firstOrNull { it.size > 1 && it[0] == "published_at" }?.get(1)?.toLongOrNull()
+    } catch (_: Exception) {
+        null
+    }
+
+    companion object {
+        const val kind = 30402
+
+        fun create(
+            dTag: String,
+            title: String?,
+            image: String?,
+            summary: String?,
+            price: Price?,
+            location: String?,
+            publishedAt: Long?,
+            privateKey: ByteArray,
+            createdAt: Long = TimeUtils.now()
+        ): ClassifiedsEvent {
+            val tags = mutableListOf<List<String>>()
+
+            tags.add(listOf("d", dTag))
+            title?.let { tags.add(listOf("title", it)) }
+            image?.let { tags.add(listOf("image", it)) }
+            summary?.let { tags.add(listOf("summary", it)) }
+            price?.let {
+                if (it.frequency != null && it.currency != null) {
+                    tags.add(listOf("price", it.amount, it.currency, it.frequency))
+                } else if (it.currency != null) {
+                    tags.add(listOf("price", it.amount, it.currency))
+                } else {
+                    tags.add(listOf("price", it.amount))
+                }
+            }
+            location?.let { tags.add(listOf("location", it)) }
+            publishedAt?.let { tags.add(listOf("publishedAt", it.toString())) }
+            title?.let { tags.add(listOf("title", it)) }
+
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
+            val id = generateId(pubKey, createdAt, kind, tags, "")
+            val sig = CryptoUtils.sign(id, privateKey)
+            return ClassifiedsEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
+        }
+    }
+}
+
+data class Price(val amount: String, val currency: String?, val frequency: String?)

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

@@ -0,0 +1,42 @@
+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 CommunityDefinitionEvent(
+    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 description() = tags.firstOrNull { it.size > 1 && it[0] == "description" }?.get(1)
+    fun image() = tags.firstOrNull { it.size > 1 && it[0] == "image" }?.get(1)
+    fun rules() = tags.firstOrNull { it.size > 1 && it[0] == "rules" }?.get(1)
+
+    fun moderators() = tags.filter { it.size > 1 && it[0] == "p" }.map { Participant(it[1], it.getOrNull(3)) }
+
+    companion object {
+        const val kind = 34550
+
+        fun create(
+            privateKey: ByteArray,
+            createdAt: Long = TimeUtils.now()
+        ): CommunityDefinitionEvent {
+            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 CommunityDefinitionEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
+        }
+    }
+}

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

@@ -0,0 +1,63 @@
+package com.vitorpamplona.amethyst.service.model
+
+import android.util.Log
+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
+
+@Immutable
+class CommunityPostApprovalEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: List<List<String>>,
+    content: String,
+    sig: HexKey
+) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
+    fun containedPost(): Event? = try {
+        content.ifBlank { null }?.let {
+            fromJson(it, Client.lenient)
+        }
+    } catch (e: Exception) {
+        Log.w("CommunityPostEvent", "Failed to Parse Community Approval Contained Post of $id with $content")
+        null
+    }
+
+    fun communities() = tags.filter { it.size > 1 && it[0] == "a" }.mapNotNull {
+        val aTag = ATag.parse(it[1], it.getOrNull(2))
+
+        if (aTag?.kind == CommunityDefinitionEvent.kind) {
+            aTag
+        } else {
+            null
+        }
+    }
+
+    fun approvedEvents() = tags.filter {
+        it.size > 1 && (it[0] == "e" || (it[0] == "a" && ATag.parse(it[1], null)?.kind != CommunityDefinitionEvent.kind))
+    }.map {
+        it[1]
+    }
+
+    companion object {
+        const val kind = 4550
+
+        fun create(approvedPost: Event, community: CommunityDefinitionEvent, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): GenericRepostEvent {
+            val content = approvedPost.toJson()
+
+            val communities = listOf("a", community.address().toTag())
+            val replyToPost = listOf("e", approvedPost.id())
+            val replyToAuthor = listOf("p", approvedPost.pubKey())
+            val kind = listOf("k", "${approvedPost.kind()}")
+
+            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 = 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

@@ -5,10 +5,10 @@ import androidx.compose.runtime.Immutable
 import androidx.compose.runtime.Stable
 import com.google.gson.reflect.TypeToken
 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 java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 data class Contact(val pubKeyHex: String, val relayUri: String?)
@@ -39,12 +39,23 @@ class ContactListEvent(
         unverifiedFollowTagSet().map { it.lowercase() }.toSet()
     }
 
+    val verifiedFollowGeohashSet: Set<String> by lazy {
+        unverifiedFollowGeohashSet().map { it.lowercase() }.toSet()
+    }
+
+    val verifiedFollowCommunitySet: Set<String> by lazy {
+        unverifiedFollowAddressSet().toSet()
+    }
+
     val verifiedFollowKeySetAndMe: Set<HexKey> by lazy {
         verifiedFollowKeySet + pubKey
     }
 
     fun unverifiedFollowKeySet() = tags.filter { it[0] == "p" }.mapNotNull { it.getOrNull(1) }
     fun unverifiedFollowTagSet() = tags.filter { it[0] == "t" }.mapNotNull { it.getOrNull(1) }
+    fun unverifiedFollowGeohashSet() = tags.filter { it[0] == "g" }.mapNotNull { it.getOrNull(1) }
+
+    fun unverifiedFollowAddressSet() = tags.filter { it[0] == "a" }.mapNotNull { it.getOrNull(1) }
 
     fun follows() = tags.filter { it[0] == "p" }.mapNotNull {
         try {
@@ -73,14 +84,23 @@ class ContactListEvent(
     companion object {
         const val kind = 3
 
-        fun create(follows: List<Contact>, followTags: List<String>, relayUse: Map<String, ReadWrite>?, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ContactListEvent {
+        fun createFromScratch(
+            followUsers: List<Contact>,
+            followTags: List<String>,
+            followGeohashes: 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 +108,155 @@ 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())
+                }
+            } + followGeohashes.map {
+                listOf("g", it)
             }
 
+            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 followGeohash(earlierVersion: ContactListEvent, hashtag: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (earlierVersion.isTaggedGeoHash(hashtag)) return earlierVersion
+
+            return create(
+                content = earlierVersion.content,
+                tags = earlierVersion.tags.plus(element = listOf("g", hashtag)),
+                privateKey = privateKey,
+                createdAt = createdAt
+            )
+        }
+
+        fun unfollowGeohash(earlierVersion: ContactListEvent, hashtag: String, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): ContactListEvent {
+            if (!earlierVersion.isTaggedGeoHash(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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class DeletionEvent(
@@ -20,12 +20,12 @@ class DeletionEvent(
     companion object {
         const val kind = 5
 
-        fun create(deleteEvents: List<String>, privateKey: ByteArray, createdAt: Long = Date().time / 1000): 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

@@ -0,0 +1,56 @@
+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 EmojiPackEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: List<List<String>>,
+    content: String,
+    sig: HexKey
+) : GeneralListEvent(id, pubKey, createdAt, kind, tags, content, sig) {
+
+    companion object {
+        const val kind = 30030
+
+        fun create(
+            name: String = "",
+            privateKey: ByteArray,
+            createdAt: Long = TimeUtils.now()
+        ): EmojiPackEvent {
+            val content = ""
+            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 = CryptoUtils.sign(id, privateKey)
+            return EmojiPackEvent(id.toHexKey(), pubKey.toHexKey(), createdAt, tags, content, sig.toHexKey())
+        }
+    }
+}
+
+@Immutable
+data class EmojiUrl(val code: String, val url: String) {
+    fun encode(): String {
+        return ":$code:$url"
+    }
+
+    companion object {
+        fun decode(encodedEmojiSetup: String): EmojiUrl? {
+            val emojiParts = encodedEmojiSetup.split(":", limit = 3)
+            return if (emojiParts.size > 2) {
+                EmojiUrl(emojiParts[1], emojiParts[2])
+            } else {
+                null
+            }
+        }
+    }
+}

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

@@ -0,0 +1,43 @@
+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 EmojiPackSelectionEvent(
+    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() = ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
+
+    companion object {
+        const val kind = 10030
+
+        fun create(
+            listOfEmojiPacks: List<ATag>?,
+            privateKey: ByteArray,
+            createdAt: Long = TimeUtils.now()
+        ): EmojiPackSelectionEvent {
+            val msg = ""
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
+            val tags = mutableListOf<List<String>>()
+
+            listOfEmojiPacks?.forEach {
+                tags.add(listOf("a", it.toTag()))
+            }
+
+            val id = generateId(pubKey, createdAt, kind, tags, msg)
+            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

@@ -5,14 +5,13 @@ import androidx.compose.runtime.Immutable
 import com.google.gson.*
 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
@@ -43,10 +42,12 @@ 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]) }
 
     override fun isSensitive() = tags.any {
         (it.size > 0 && it[0].equals("content-warning", true)) ||
@@ -55,12 +56,12 @@ open class Event(
     }
 
     override fun zapraiserAmount() = tags.firstOrNull() {
-        (it.size > 1 && it[0].equals("zapraiser", true))
+        (it.size > 1 && it[0] == "zapraiser")
     }?.get(1)?.toLongOrNull()
 
     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)
 
@@ -68,13 +69,42 @@ open class Event(
     }
 
     override fun hashtags() = tags.filter { it.size > 1 && it[0] == "t" }.map { it[1] }
+    override fun geohashes() = tags.filter { it.size > 1 && it[0] == "g" }.map { it[1] }
+
+    override fun matchTag1With(text: String) = tags.any { it.size > 1 && it[1].contains(text, true) }
 
     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 isTaggedGeoHash(hashtag: String) = tags.any { it.size > 1 && it[0] == "g" && it[1].startsWith(hashtag, true) }
     override fun isTaggedHashes(hashtags: Set<String>) = tags.any { it.size > 1 && it[0] == "t" && it[1].lowercase() in hashtags }
+    override fun isTaggedGeoHashes(hashtags: Set<String>) = tags.any { it.size > 1 && it[0] == "g" && 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)
 
+    override fun firstIsTaggedAddressableNote(addressableNotes: Set<String>) = tags.firstOrNull { it.size > 1 && it[0] == "a" && it[1] in addressableNotes }?.getOrNull(1)
+
+    override fun isTaggedAddressableKind(kind: Int): Boolean {
+        val kindStr = kind.toString()
+        return tags.any { it.size > 1 && it[0] == "a" && it[1].startsWith(kindStr) }
+    }
+
+    override fun getTagOfAddressableKind(kind: Int): ATag? {
+        val kindStr = kind.toString()
+        val aTag = tags
+            .firstOrNull { it.size > 1 && it[0] == "a" && it[1].startsWith(kindStr) }
+            ?.getOrNull(1)
+            ?: return null
+
+        return ATag.parse(aTag, null)
+    }
+
     override fun getPoWRank(): Int {
         var rank = 0
         for (i in 0..id.length) {
@@ -96,6 +126,10 @@ open class Event(
         return rank
     }
 
+    override fun getGeoHash(): String? {
+        return tags.firstOrNull { it.size > 1 && it[0] == "g" }?.get(1)?.ifBlank { null }
+    }
+
     override fun getReward(): BigDecimal? {
         return try {
             tags.firstOrNull { it.size > 1 && it[0] == "reward" }?.get(1)?.let { BigDecimal(it) }
@@ -104,6 +138,18 @@ 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.
      */
@@ -117,14 +163,14 @@ 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
@@ -142,7 +188,7 @@ 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> {
@@ -210,12 +256,10 @@ open class Event(
             src: ByteArray,
             typeOfSrc: Type?,
             context: JsonSerializationContext?
-        ) = JsonPrimitive(src.toHex())
+        ) = JsonPrimitive(src.toHexKey())
     }
 
     companion object {
-        private val secp256k1 = Secp256k1.get()
-
         val gson: Gson = GsonBuilder()
             .disableHtmlEscaping()
             .registerTypeAdapter(Event::class.java, EventSerializer())
@@ -230,46 +274,8 @@ open class Event(
 
         fun fromJson(json: JsonElement, lenient: Boolean = false): Event = gson.fromJson(json, Event::class.java).getRefinedEvent(lenient)
 
-        fun Event.getRefinedEvent(lenient: Boolean = false): Event = when (kind) {
-            AppDefinitionEvent.kind -> AppDefinitionEvent(id, pubKey, createdAt, tags, content, sig)
-            AppRecommendationEvent.kind -> AppRecommendationEvent(id, pubKey, createdAt, tags, content, sig)
-            AudioTrackEvent.kind -> AudioTrackEvent(id, pubKey, createdAt, tags, content, sig)
-            BadgeAwardEvent.kind -> BadgeAwardEvent(id, pubKey, createdAt, tags, content, sig)
-            BadgeDefinitionEvent.kind -> BadgeDefinitionEvent(id, pubKey, createdAt, tags, content, sig)
-            BadgeProfilesEvent.kind -> BadgeProfilesEvent(id, pubKey, createdAt, tags, content, sig)
-            BookmarkListEvent.kind -> BookmarkListEvent(id, pubKey, createdAt, tags, content, sig)
-            ChannelCreateEvent.kind -> ChannelCreateEvent(id, pubKey, createdAt, tags, content, sig)
-            ChannelHideMessageEvent.kind -> ChannelHideMessageEvent(id, pubKey, createdAt, tags, content, sig)
-            ChannelMessageEvent.kind -> ChannelMessageEvent(id, pubKey, createdAt, tags, content, sig)
-            ChannelMetadataEvent.kind -> ChannelMetadataEvent(id, pubKey, createdAt, tags, content, sig)
-            ChannelMuteUserEvent.kind -> ChannelMuteUserEvent(id, pubKey, createdAt, tags, content, sig)
-            ContactListEvent.kind -> ContactListEvent(id, pubKey, createdAt, tags, content, sig)
-            DeletionEvent.kind -> DeletionEvent(id, pubKey, createdAt, tags, content, sig)
-
-            FileHeaderEvent.kind -> FileHeaderEvent(id, pubKey, createdAt, tags, content, sig)
-            FileStorageEvent.kind -> FileStorageEvent(id, pubKey, createdAt, tags, content, sig)
-            FileStorageHeaderEvent.kind -> FileStorageHeaderEvent(id, pubKey, createdAt, tags, content, sig)
-            GenericRepostEvent.kind -> GenericRepostEvent(id, pubKey, createdAt, tags, content, sig)
-            HighlightEvent.kind -> HighlightEvent(id, pubKey, createdAt, tags, content, sig)
-            LiveActivitiesEvent.kind -> LiveActivitiesEvent(id, pubKey, createdAt, tags, content, sig)
-            LiveActivitiesChatMessageEvent.kind -> LiveActivitiesChatMessageEvent(id, pubKey, createdAt, tags, content, sig)
-            LnZapEvent.kind -> LnZapEvent(id, pubKey, createdAt, tags, content, sig)
-            LnZapPaymentRequestEvent.kind -> LnZapPaymentRequestEvent(id, pubKey, createdAt, tags, content, sig)
-            LnZapPaymentResponseEvent.kind -> LnZapPaymentResponseEvent(id, pubKey, createdAt, tags, content, sig)
-            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)
-            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)
-            PrivateDmEvent.kind -> PrivateDmEvent(id, pubKey, createdAt, tags, content, sig)
-            ReactionEvent.kind -> ReactionEvent(id, pubKey, createdAt, tags, content, sig)
-            RecommendRelayEvent.kind -> RecommendRelayEvent(id, pubKey, createdAt, tags, content, sig, lenient)
-            RelaySetEvent.kind -> RelaySetEvent(id, pubKey, createdAt, tags, content, sig)
-            ReportEvent.kind -> ReportEvent(id, pubKey, createdAt, tags, content, sig)
-            RepostEvent.kind -> RepostEvent(id, pubKey, createdAt, tags, content, sig)
-            TextNoteEvent.kind -> TextNoteEvent(id, pubKey, createdAt, tags, content, sig)
-            else -> this
+        fun Event.getRefinedEvent(lenient: Boolean = false): Event {
+            return EventFactory.create(id, pubKey, createdAt, kind, tags, content, sig, lenient)
         }
 
         fun generateId(pubKey: HexKey, createdAt: Long, kind: Int, tags: List<List<String>>, content: String): ByteArray {
@@ -290,13 +296,13 @@ 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 = Date().time / 1000): Event {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+        fun create(privateKey: ByteArray, kind: Int, tags: List<List<String>> = emptyList(), content: String = "", createdAt: Long = TimeUtils.now()): Event {
+            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/EventFactory.kt

@@ -0,0 +1,106 @@
+package com.vitorpamplona.amethyst.service.model
+
+import com.vitorpamplona.amethyst.model.toHexKey
+
+class EventFactory {
+    companion object {
+        fun create(
+            id: String,
+            pubKey: String,
+            createdAt: Long,
+            kind: Int,
+            tags: List<List<String>>,
+            content: String,
+            sig: String,
+            lenient: Boolean
+        ): Event {
+            val internedTags = tags.map {
+                it.map {
+                    it.intern()
+                }
+            }
+
+            return internedCreate(
+                id = id.intern(),
+                pubKey = pubKey.intern(),
+                createdAt = createdAt,
+                kind = kind,
+                tags = internedTags,
+                content = content,
+                sig = sig,
+                lenient = lenient
+            )
+        }
+
+        fun internedCreate(
+            id: String,
+            pubKey: String,
+            createdAt: Long,
+            kind: Int,
+            tags: List<List<String>>,
+            content: String,
+            sig: String,
+            lenient: Boolean
+        ) = when (kind) {
+            AppDefinitionEvent.kind -> AppDefinitionEvent(id, pubKey, createdAt, tags, content, sig)
+            AppRecommendationEvent.kind -> AppRecommendationEvent(id, pubKey, createdAt, tags, content, sig)
+            AudioTrackEvent.kind -> AudioTrackEvent(id, pubKey, createdAt, tags, content, sig)
+            BadgeAwardEvent.kind -> BadgeAwardEvent(id, pubKey, createdAt, tags, content, sig)
+            BadgeDefinitionEvent.kind -> BadgeDefinitionEvent(id, pubKey, createdAt, tags, content, sig)
+            BadgeProfilesEvent.kind -> BadgeProfilesEvent(id, pubKey, createdAt, tags, content, sig)
+            BookmarkListEvent.kind -> BookmarkListEvent(id, pubKey, createdAt, tags, content, sig)
+            ChannelCreateEvent.kind -> ChannelCreateEvent(id, pubKey, createdAt, tags, content, sig)
+            ChannelHideMessageEvent.kind -> ChannelHideMessageEvent(id, pubKey, createdAt, tags, content, sig)
+            ChannelMessageEvent.kind -> ChannelMessageEvent(id, pubKey, createdAt, tags, content, sig)
+            ChannelMetadataEvent.kind -> ChannelMetadataEvent(id, pubKey, createdAt, tags, content, sig)
+            ChannelMuteUserEvent.kind -> ChannelMuteUserEvent(id, pubKey, createdAt, tags, content, sig)
+            ChatMessageEvent.kind -> {
+                if (id.isBlank()) {
+                    val id = Event.generateId(pubKey, createdAt, kind, tags, content).toHexKey()
+                    ChatMessageEvent(id, pubKey, createdAt, tags, content, sig)
+                } else {
+                    ChatMessageEvent(id, pubKey, createdAt, tags, content, sig)
+                }
+            }
+            ClassifiedsEvent.kind -> ClassifiedsEvent(id, pubKey, createdAt, tags, content, sig)
+            CommunityDefinitionEvent.kind -> CommunityDefinitionEvent(id, pubKey, createdAt, tags, content, sig)
+            CommunityPostApprovalEvent.kind -> CommunityPostApprovalEvent(id, pubKey, createdAt, tags, content, sig)
+            ContactListEvent.kind -> ContactListEvent(id, pubKey, createdAt, tags, content, sig)
+            DeletionEvent.kind -> DeletionEvent(id, pubKey, createdAt, tags, content, sig)
+
+            // Will never happen.
+            // DirectMessageEvent.kind -> DirectMessageEvent(createdAt, tags, content)
+
+            EmojiPackEvent.kind -> EmojiPackEvent(id, pubKey, createdAt, tags, content, sig)
+            EmojiPackSelectionEvent.kind -> EmojiPackSelectionEvent(id, pubKey, createdAt, tags, content, sig)
+            SealedGossipEvent.kind -> SealedGossipEvent(id, pubKey, createdAt, tags, content, sig)
+
+            FileHeaderEvent.kind -> FileHeaderEvent(id, pubKey, createdAt, tags, content, sig)
+            FileStorageEvent.kind -> FileStorageEvent(id, pubKey, createdAt, tags, content, sig)
+            FileStorageHeaderEvent.kind -> FileStorageHeaderEvent(id, pubKey, createdAt, tags, content, sig)
+            GenericRepostEvent.kind -> GenericRepostEvent(id, pubKey, createdAt, tags, content, sig)
+            GiftWrapEvent.kind -> GiftWrapEvent(id, pubKey, createdAt, tags, content, sig)
+            HighlightEvent.kind -> HighlightEvent(id, pubKey, createdAt, tags, content, sig)
+            LiveActivitiesEvent.kind -> LiveActivitiesEvent(id, pubKey, createdAt, tags, content, sig)
+            LiveActivitiesChatMessageEvent.kind -> LiveActivitiesChatMessageEvent(id, pubKey, createdAt, tags, content, sig)
+            LnZapEvent.kind -> LnZapEvent(id, pubKey, createdAt, tags, content, sig)
+            LnZapPaymentRequestEvent.kind -> LnZapPaymentRequestEvent(id, pubKey, createdAt, tags, content, sig)
+            LnZapPaymentResponseEvent.kind -> LnZapPaymentResponseEvent(id, pubKey, createdAt, tags, content, sig)
+            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)
+            PrivateDmEvent.kind -> PrivateDmEvent(id, pubKey, createdAt, tags, content, sig)
+            ReactionEvent.kind -> ReactionEvent(id, pubKey, createdAt, tags, content, sig)
+            RecommendRelayEvent.kind -> RecommendRelayEvent(id, pubKey, createdAt, tags, content, sig, lenient)
+            RelaySetEvent.kind -> RelaySetEvent(id, pubKey, createdAt, tags, content, sig)
+            ReportEvent.kind -> ReportEvent(id, pubKey, createdAt, tags, content, sig)
+            RepostEvent.kind -> RepostEvent(id, pubKey, createdAt, tags, content, sig)
+            TextNoteEvent.kind -> TextNoteEvent(id, pubKey, createdAt, tags, content, sig)
+            else -> Event(id, pubKey, createdAt, kind, tags, content, sig)
+        }
+    }
+}

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

@@ -28,15 +28,39 @@ interface EventInterface {
 
     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 isTaggedGeoHash(hashtag: String): Boolean
+
     fun isTaggedHashes(hashtags: Set<String>): Boolean
+    fun isTaggedGeoHashes(hashtags: Set<String>): Boolean
+
     fun firstIsTaggedHashes(hashtags: Set<String>): String?
+    fun firstIsTaggedAddressableNote(addressableNotes: Set<String>): String?
+
+    fun isTaggedAddressableKind(kind: Int): Boolean
+    fun getTagOfAddressableKind(kind: Int): ATag?
+
     fun hashtags(): List<String>
+    fun geohashes(): List<String>
 
     fun getReward(): BigDecimal?
     fun getPoWRank(): Int
+    fun getGeoHash(): String?
 
     fun zapAddress(): String?
     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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class FileHeaderEvent(
@@ -50,8 +50,9 @@ class FileHeaderEvent(
             magnetURI: String? = null,
             torrentInfoHash: String? = null,
             encryptionKey: AESGCM? = null,
+            sensitiveContent: Boolean? = null,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            createdAt: Long = TimeUtils.now()
         ): FileHeaderEvent {
             val tags = listOfNotNull(
                 listOf(URL, url),
@@ -62,13 +63,20 @@ class FileHeaderEvent(
                 blurhash?.let { listOf(BLUR_HASH, it) },
                 magnetURI?.let { listOf(MAGNET_URI, it) },
                 torrentInfoHash?.let { listOf(TORRENT_INFOHASH, it) },
-                encryptionKey?.let { listOf(ENCRYPTION_KEY, it.key, it.nonce) }
+                encryptionKey?.let { listOf(ENCRYPTION_KEY, it.key, it.nonce) },
+                sensitiveContent?.let {
+                    if (it) {
+                        listOf("content-warning", "")
+                    } else {
+                        null
+                    }
+                }
             )
 
             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

@@ -3,10 +3,10 @@ package com.vitorpamplona.amethyst.service.model
 import android.util.Log
 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
-import java.util.Date
 
 @Immutable
 class FileStorageEvent(
@@ -44,16 +44,16 @@ class FileStorageEvent(
             mimeType: String,
             data: ByteArray,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            createdAt: Long = TimeUtils.now()
         ): FileStorageEvent {
             val tags = listOfNotNull(
                 listOf(TYPE, mimeType)
             )
 
             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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class FileStorageHeaderEvent(
@@ -50,8 +50,9 @@ class FileStorageHeaderEvent(
             magnetURI: String? = null,
             torrentInfoHash: String? = null,
             encryptionKey: AESGCM? = null,
+            sensitiveContent: Boolean? = null,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            createdAt: Long = TimeUtils.now()
         ): FileStorageHeaderEvent {
             val tags = listOfNotNull(
                 listOf("e", storageEvent.id),
@@ -62,13 +63,20 @@ class FileStorageHeaderEvent(
                 blurhash?.let { listOf(BLUR_HASH, it) },
                 magnetURI?.let { listOf(MAGNET_URI, it) },
                 torrentInfoHash?.let { listOf(TORRENT_INFOHASH, it) },
-                encryptionKey?.let { listOf(ENCRYPTION_KEY, it.key, it.nonce) }
+                encryptionKey?.let { listOf(ENCRYPTION_KEY, it.key, it.nonce) },
+                sensitiveContent?.let {
+                    if (it) {
+                        listOf("content-warning", "")
+                    } else {
+                        null
+                    }
+                }
             )
 
             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.getSharedSecretNIP04(privKey, pubKey.hexToByteArray())
 
-            return Utils.decrypt(content, sharedSecret)
+            return CryptoUtils.decryptNIP04(content, sharedSecret)
         } catch (e: Exception) {
             Log.w("GeneralList", "Error decrypting the message ${e.message} for ${dTag()}")
             null
@@ -54,7 +54,14 @@ 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 privateGeohashes(privKey: ByteArray) = privateTags(privKey)?.filter { it.size > 1 && it[0] == "g" }?.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 +91,22 @@ abstract class GeneralListEvent(
             }
             val msg = gson.toJson(privTags)
 
-            return Utils.encrypt(
+            return CryptoUtils.encryptNIP04(
                 msg,
                 privateKey,
                 pubKey
             )
         }
+
+        fun encryptTags(
+            privateTags: List<List<String>>? = null,
+            privateKey: ByteArray
+        ): String {
+            return CryptoUtils.encryptNIP04(
+                msg = gson.toJson(privateTags),
+                privateKey = privateKey,
+                pubKey = CryptoUtils.pubkeyCreate(privateKey)
+            )
+        }
     }
 }

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

@@ -2,10 +2,10 @@ 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
 import com.vitorpamplona.amethyst.service.relays.Client
-import nostr.postr.Utils
-import java.util.Date
 
 @Immutable
 class GenericRepostEvent(
@@ -29,13 +29,13 @@ class GenericRepostEvent(
     companion object {
         const val kind = 16
 
-        fun create(boostedPost: EventInterface, privateKey: ByteArray, createdAt: Long = Date().time / 1000): GenericRepostEvent {
+        fun create(boostedPost: EventInterface, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): GenericRepostEvent {
             val content = boostedPost.toJson()
 
             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/GiftWrapEvent.kt

@@ -0,0 +1,84 @@
+package com.vitorpamplona.amethyst.service.model
+
+import android.util.Log
+import androidx.compose.runtime.Immutable
+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 com.vitorpamplona.amethyst.service.CryptoUtils
+import com.vitorpamplona.amethyst.service.EncryptedInfo
+import com.vitorpamplona.amethyst.service.relays.Client
+
+@Immutable
+class GiftWrapEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: List<List<String>>,
+    content: String,
+    sig: HexKey
+) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
+    private var cachedInnerEvent: Map<HexKey, Event?> = mapOf()
+
+    fun cachedGossip(privKey: ByteArray): Event? {
+        val hex = privKey.toHexKey()
+        if (cachedInnerEvent.contains(hex)) return cachedInnerEvent[hex]
+
+        val myInnerEvent = unwrap(privKey = privKey)
+        cachedInnerEvent = cachedInnerEvent + Pair(hex, myInnerEvent)
+        return myInnerEvent
+    }
+
+    fun unwrap(privKey: ByteArray) = try {
+        plainContent(privKey)?.let { fromJson(it, Client.lenient) }
+    } catch (e: Exception) {
+        // Log.e("UnwrapError", "Couldn't Decrypt the content", e)
+        null
+    }
+
+    private fun plainContent(privKey: ByteArray): String? {
+        if (content.isBlank()) return null
+
+        return try {
+            val sharedSecret = CryptoUtils.getSharedSecretNIP24(privKey, pubKey.hexToByteArray())
+
+            val toDecrypt = gson.fromJson<EncryptedInfo>(
+                content,
+                EncryptedInfo::class.java
+            )
+
+            return CryptoUtils.decryptNIP24(toDecrypt, sharedSecret)
+        } catch (e: Exception) {
+            Log.w("GeneralList", "Error decrypting the message ${e.message}")
+            null
+        }
+    }
+
+    fun recipientPubKey() = tags.firstOrNull { it.size > 1 && it[0] == "p" }?.get(1)
+
+    companion object {
+        const val kind = 1059
+
+        fun create(
+            event: Event,
+            recipientPubKey: HexKey,
+            createdAt: Long = TimeUtils.now()
+        ): GiftWrapEvent {
+            val privateKey = CryptoUtils.privkeyCreate() // GiftWrap is always a random key
+            val sharedSecret = CryptoUtils.getSharedSecretNIP24(privateKey, recipientPubKey.hexToByteArray())
+
+            val content = gson.toJson(
+                CryptoUtils.encryptNIP24(
+                    gson.toJson(event),
+                    sharedSecret
+                )
+            )
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
+            val tags = listOf(listOf("p", recipientPubKey))
+            val id = generateId(pubKey, createdAt, kind, tags, content)
+            val sig = CryptoUtils.sign(id, privateKey)
+            return GiftWrapEvent(id.toHexKey(), pubKey, createdAt, tags, content, sig.toHexKey())
+        }
+    }
+}

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

@@ -2,10 +2,9 @@ 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 nostr.postr.Utils
-import java.security.MessageDigest
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class HTTPAuthorizationEvent(
@@ -25,13 +24,11 @@ class HTTPAuthorizationEvent(
             method: String,
             body: String? = null,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class HighlightEvent(
@@ -20,18 +20,20 @@ class HighlightEvent(
     fun author() = taggedUsers().firstOrNull()
     fun quote() = content
 
+    fun inPost() = taggedAddresses().firstOrNull()
+
     companion object {
         const val kind = 9802
 
         fun create(
             msg: String,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class LiveActivitiesChatMessageEvent(
@@ -49,12 +49,13 @@ class LiveActivitiesChatMessageEvent(
             mentions: List<String>? = null,
             zapReceiver: String?,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000,
+            createdAt: Long = TimeUtils.now(),
             markAsSensitive: Boolean,
-            zapRaiserAmount: Long?
+            zapRaiserAmount: Long?,
+            geohash: String? = null
         ): LiveActivitiesChatMessageEvent {
             val content = message
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val pubKey = CryptoUtils.pubkeyCreate(privateKey).toHexKey()
             val tags = mutableListOf(
                 listOf("a", activity.toTag(), "", "root")
             )
@@ -73,9 +74,12 @@ class LiveActivitiesChatMessageEvent(
             zapRaiserAmount?.let {
                 tags.add(listOf("zapraiser", "$it"))
             }
+            geohash?.let {
+                tags.add(listOf("g", it))
+            }
 
             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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class LiveActivitiesEvent(
@@ -23,25 +23,37 @@ class LiveActivitiesEvent(
     fun summary() = tags.firstOrNull { it.size > 1 && it[0] == "summary" }?.get(1)
     fun image() = tags.firstOrNull { it.size > 1 && it[0] == "image" }?.get(1)
     fun streaming() = tags.firstOrNull { it.size > 1 && it[0] == "streaming" }?.get(1)
-    fun starts() = tags.firstOrNull { it.size > 1 && it[0] == "starts" }?.get(1)
+    fun starts() = tags.firstOrNull { it.size > 1 && it[0] == "starts" }?.get(1)?.toLongOrNull()
     fun ends() = tags.firstOrNull { it.size > 1 && it[0] == "ends" }?.get(1)
-    fun status() = tags.firstOrNull { it.size > 1 && it[0] == "status" }?.get(1)
+    fun status() = checkStatus(tags.firstOrNull { it.size > 1 && it[0] == "status" }?.get(1))
     fun currentParticipants() = tags.firstOrNull { it.size > 1 && it[0] == "current_participants" }?.get(1)
     fun totalParticipants() = tags.firstOrNull { it.size > 1 && it[0] == "total_participants" }?.get(1)
 
-    fun participants() = tags.filter { it.size > 1 && it[0] == "p" }.map { Participant(it[1], it.getOrNull(2)) }
+    fun participants() = tags.filter { it.size > 1 && it[0] == "p" }.map { Participant(it[1], it.getOrNull(3)) }
+
+    fun checkStatus(eventStatus: String?): String? {
+        return if (eventStatus == STATUS_LIVE && createdAt < TimeUtils.eightHoursAgo()) {
+            STATUS_ENDED
+        } else {
+            eventStatus
+        }
+    }
 
     companion object {
         const val kind = 30311
 
+        const val STATUS_LIVE = "live"
+        const val STATUS_PLANNED = "planned"
+        const val STATUS_ENDED = "ended"
+
         fun create(
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            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

@@ -7,11 +7,11 @@ import com.google.gson.JsonDeserializer
 import com.google.gson.JsonElement
 import com.google.gson.JsonParseException
 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
-import java.util.Date
 
 @Immutable
 class LnZapPaymentRequestEvent(
@@ -35,9 +35,9 @@ class LnZapPaymentRequestEvent(
         }
 
         return try {
-            val sharedSecret = Utils.getSharedSecret(privKey, pubkey)
+            val sharedSecret = CryptoUtils.getSharedSecretNIP04(privKey, pubkey)
 
-            val jsonText = Utils.decrypt(content, sharedSecret)
+            val jsonText = CryptoUtils.decryptNIP04(content, sharedSecret)
 
             val payInvoiceMethod = gson.fromJson(jsonText, Request::class.java)
 
@@ -57,12 +57,12 @@ class LnZapPaymentRequestEvent(
             lnInvoice: String,
             walletServicePubkey: String,
             privateKey: ByteArray,
-            createdAt: Long = Date().time / 1000
+            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.encryptNIP04(
                 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.getSharedSecretNIP04(privKey, pubKey)
 
-            val retVal = Utils.decrypt(content, sharedSecret)
+            val retVal = CryptoUtils.decryptNIP04(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
@@ -64,11 +62,11 @@ class LnZapRequestEvent(
             pollOption: Int?,
             message: String,
             zapType: LnZapEvent.ZapType,
-            createdAt: Long = Date().time / 1000
+            createdAt: Long = TimeUtils.now()
         ): 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())
         }
 
@@ -104,18 +102,18 @@ class LnZapRequestEvent(
             privateKey: ByteArray,
             message: String,
             zapType: LnZapEvent.ZapType,
-            createdAt: Long = Date().time / 1000
+            createdAt: Long = TimeUtils.now()
         ): 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.getSharedSecretNIP04(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.getSharedSecretNIP04(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

@@ -2,9 +2,9 @@ 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 nostr.postr.Utils
-import java.util.Date
+import com.vitorpamplona.amethyst.service.CryptoUtils
 
 @Immutable
 class LongTextNoteEvent(
@@ -32,8 +32,8 @@ class LongTextNoteEvent(
     companion object {
         const val kind = 30023
 
-        fun create(msg: String, replyTos: List<String>?, mentions: List<String>?, privateKey: ByteArray, createdAt: Long = Date().time / 1000): LongTextNoteEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+        fun create(msg: String, replyTos: List<String>?, mentions: List<String>?, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): LongTextNoteEvent {
+            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

@@ -7,11 +7,11 @@ import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.google.gson.Gson
 import com.vitorpamplona.amethyst.R
 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
-import java.util.Date
 
 @Stable
 abstract class IdentityClaim(
@@ -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
     }
 
@@ -171,8 +171,8 @@ class MetadataEvent(
                 .readerFor(UserMetadata::class.java)
         }
 
-        fun create(contactMetaData: String, identities: List<IdentityClaim>, privateKey: ByteArray, createdAt: Long = Date().time / 1000): MetadataEvent {
-            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+        fun create(contactMetaData: String, identities: List<IdentityClaim>, privateKey: ByteArray, createdAt: Long = TimeUtils.now()): MetadataEvent {
+            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())
         }
     }