v0.20.1

2. Checks if NIP 05 is an email before starting to verify to avoid crashes.
3. Allowing ellipsis to avoid breaking the nip05 into multiple lines.

README.md

@@ -11,20 +11,24 @@ Amethyst brings the best social network to your Android phone. Just insert your
 - [x] Notifications Feed
 - [x] Global Feed
 - [x] Reactions (like, boost, reply)
-- [x] Image Preview (gifs, svgs)
+- [x] Image/Video Preview (gifs, svgs, etc)
 - [x] Url Preview
 - [x] View Threads
 - [x] Private Messages (NIP-04)
 - [x] User Profiles (follow/unfollow)
 - [x] Public Chats (NIP-28)
-- [ ] Notification Bubbles
+- [x] Notification Dots
+- [x] Reporting and Hide User capability
+- [x] Automatic Translations
+- [x] Profile Edit
+- [x] Relay Edit (separate relay sets for home, dms, public chats, global)
+- [x] Dropdown to Link Users when writing
+- [x] Lightning Tips
+- [x] Zaps 
+- [x] Event Deletion (NIP-09: like, boost, text notes and reports)
+- [ ] Internationalization
 - [ ] Infinity Scroll 
-- [ ] Dropdown to Link Users/Posts when writing
 - [ ] Identity Verification (NIP-05)
-- [ ] Event Delegation (NIP-09)
-- [ ] Filter messages from Unknown People
-- [ ] Profile Edit
-- [ ] Relay Edit
 - [ ] Account Creation / Backup Guidance
 - [ ] Message Sent feedback
 
@@ -123,4 +127,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.

app/build.gradle

@@ -11,8 +11,8 @@ android {
         applicationId "com.vitorpamplona.amethyst"
         minSdk 26
         targetSdk 33
-        versionCode 42
-        versionName "0.14.2"
+        versionCode 76
+        versionName "0.20.2"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
@@ -22,8 +22,8 @@ android {
 
     buildTypes {
         release {
-            minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            //minifyEnabled true
+            //proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
             resValue "string", "app_name", "@string/app_name_release"
         }
         debug {
@@ -43,7 +43,7 @@ android {
         compose true
     }
     composeOptions {
-        kotlinCompilerExtensionVersion '1.4.0'
+        kotlinCompilerExtensionVersion "1.4.3"
     }
     packagingOptions {
         resources {
@@ -54,7 +54,7 @@ android {
 
 dependencies {
     implementation 'androidx.core:core-ktx:1.9.0'
-    implementation 'androidx.activity:activity-compose:1.6.1'
+    implementation 'androidx.activity:activity-compose:1.7.0-beta01'
     implementation "androidx.compose.ui:ui:$compose_ui_version"
     implementation "androidx.compose.ui:ui-tooling-preview:$compose_ui_version"
 
@@ -62,19 +62,19 @@ dependencies {
     implementation("androidx.navigation:navigation-compose:$nav_version")
 
     // Observe Live data as State
-    implementation 'androidx.compose.runtime:runtime-livedata:1.4.0-alpha04'
+    implementation 'androidx.compose.runtime:runtime-livedata:1.4.0-beta01'
 
-    implementation 'androidx.compose.material:material:1.4.0-alpha05'
-    implementation "androidx.compose.material:material-icons-extended:1.4.0-alpha05"
+    implementation 'androidx.compose.material:material:1.4.0-beta02'
+    implementation "androidx.compose.material:material-icons-extended:1.4.0-beta02"
 
     // Lifecycle
-    implementation 'androidx.lifecycle:lifecycle-runtime-compose:2.6.0-alpha05'
-    implementation 'androidx.lifecycle:lifecycle-viewmodel-compose:2.6.0-alpha05'
-    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.6.0-alpha05'
-    implementation 'androidx.lifecycle:lifecycle-livedata:2.6.0-alpha05'
+    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"
 
     // Swipe Refresh
-    implementation 'com.google.accompanist:accompanist-swiperefresh:0.29.0-alpha'
+    implementation 'com.google.accompanist:accompanist-swiperefresh:0.29.1-alpha'
 
     // Bitcoin secp256k1 bindings to Android
     implementation 'fr.acinq.secp256k1:secp256k1-kmp-jni-android:0.7.1'
@@ -93,12 +93,17 @@ dependencies {
     // Json Serialization
     implementation 'com.fasterxml.jackson.module:jackson-module-kotlin:2.14.2'
 
+    // Robohash for Avatars
+    implementation group: 'com.github.vitorpamplona', name: 'android-robohash', version: 'master-SNAPSHOT', ext: 'aar'
+
     // link preview
     implementation 'tw.com.oneup.www:Baha-UrlPreview:1.0.1'
-    implementation 'androidx.security:security-crypto-ktx:1.1.0-alpha04'
+
+    // Encrypted Key Storage
+    implementation 'androidx.security:security-crypto-ktx:1.1.0-alpha05'
 
     // view videos
-    implementation 'com.google.android.exoplayer:exoplayer:2.18.2'
+    implementation 'com.google.android.exoplayer:exoplayer:2.18.3'
 
     // Load images from the web.
     implementation "io.coil-kt:coil-compose:2.2.2"
@@ -116,6 +121,9 @@ dependencies {
     implementation "com.google.accompanist:accompanist-pager:$accompanist_version" // Pager
     implementation "com.google.accompanist:accompanist-pager-indicators:$accompanist_version"
 
+    // Parses URLs from Text:
+    implementation "io.github.url-detector:url-detector:0.1.23"
+
     // For QR generation
     implementation 'com.google.zxing:core:3.5.1'
     implementation "androidx.camera:camera-camera2:1.2.1"
@@ -126,12 +134,18 @@ dependencies {
     implementation 'com.google.mlkit:vision-common:17.3.0'
 
     // Local Barcode Scanning model
-    implementation 'com.google.android.gms:play-services-mlkit-barcode-scanning:18.1.0'
+    // The idea is to make it work for degoogled phones
+    implementation 'com.google.mlkit:barcode-scanning:17.0.3'
 
-    // Use this dependency to use the translate text
-    implementation 'com.google.mlkit:translate:17.0.1'
+    // Local model for language identification
     implementation 'com.google.mlkit:language-id:17.0.4'
-    implementation 'com.google.android.gms:play-services-mlkit-language-id:17.0.0'
+
+    // Google services model the translate text
+    implementation 'com.google.mlkit:translate:17.0.1'
+
+
+    // Automatic memory leak detection
+    debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.10'
 
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'

app/proguard-rules.pro

@@ -31,5 +31,7 @@
 -keep class * extends com.google.gson.reflect.TypeToken
 -keep public class * implements java.lang.reflect.Type
 
+-keep class com.vitorpamplona.amethyst.lnurl.** { *; }
 -keep class com.vitorpamplona.amethyst.model.** { *; }
--keep class com.vitorpamplona.amethyst.service.** { *; }
+-keep class com.vitorpamplona.amethyst.service.** { *; }
+-keep class com.vitorpamplona.amethyst.ui.** { *; }

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

@@ -0,0 +1,78 @@
+package com.vitorpamplona.amethyst
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.android.gms.tasks.Tasks
+import com.vitorpamplona.amethyst.service.lang.LanguageTranslatorService
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class TranslationsTest {
+
+  fun translatePT(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))
+  }
+
+  fun assertTranslateContains(expected: String, input: String, translateTo: String) {
+    val translated = translatePT(input, translateTo)!!
+    assertTrue("'$translated' does not contain '$expected'", translated.contains(expected))
+  }
+
+  @Test
+  fun testTranslation() {
+    assertTranslate("Olá mundo", "Hello World", "pt")
+  }
+
+  @Test
+  fun testTranslationName() {
+    assertTranslate("Olá Vitor, como você está?", "Hello Vitor, how are you doing?", "pt")
+  }
+
+  @Test
+  fun testTranslationTag() {
+    assertTranslate("Você já viu isso, #[0]", "Have you seen this, #[0]", "pt")
+  }
+
+  @Test
+  fun testTranslationUrl() {
+    assertTranslateContains("https://t.me/mygroup", "Have you seen this https://t.me/mygroup", "pt")
+    assertTranslateContains("http://bananas.com", "Have you seen this http://bananas.com", "pt")
+    assertTranslateContains("http://bananas.com/myimage.jpg", "Have you seen this http://bananas.com/myimage.jpg", "pt")
+    assertTranslateContains("http://bananas.com?search=true&image=myimage.jpg", "Have you seen this http://bananas.com?search=true&image=myimage.jpg", "pt")
+    assertTranslate("https://i.imgur.com/EZ3QPsw.jpg", "https://i.imgur.com/EZ3QPsw.jpg", "pt")
+    assertTranslate("https://HaveYouSeenThis.com", "https://HaveYouSeenThis.com", "pt")
+    assertTranslate("https://haveyouseenthis.com", "https://haveyouseenthis.com", "pt")
+    assertTranslate("https://i.imgur.com/asdEZ3QPsw.jpg", "https://i.imgur.com/asdEZ3QPsw.jpg", "pt")
+    assertTranslateContains("https://i.imgur.com/asdEZ3QPswadfj2389rioasdjf9834riofaj9834aKLL.jpg", "Hi there! \n How are you doing? \n https://i.imgur.com/asdEZ3QPswadfj2389rioasdjf9834riofaj9834aKLL.jpg", "pt")
+  }
+
+  @Test
+  fun testChineseWithUrlDetector() {
+    assertTranslate("I entered your home page is very carton, perhaps your attention or other data is too much, and the homepage of others is not so carton. From aMethyst client", "我进入你的主页很卡顿，也许是你的关注人数或者其他数据太多了，其他人主页没有这么卡顿。来自amethyst客户端", "en")
+  }
+
+  @Test
+  fun testTranslationEmail() {
+    assertTranslateContains("vitor@amethyst.social", "Have you seen this vitor@amethyst.social", "pt")
+  }
+
+  @Test
+  fun testTranslationLnInvoice() {
+    assertTranslateContains(
+      "lnbc12u1p3lvjeupp5a5ecgp45k6pa8tu7rnkgzfuwdy3l5ylv3k5tdzrg4cr8rj2f364sdq5g9kxy7fqd9h8vmmfvdjscqzpgxqyz5vqsp5zuzyetf33aphetf0e80w7tztw6dfsjs4lmvya4cyk8umfsx00qts9qyyssqke9hphcr36zvcav8wr502g0mhfhxpy8m9tt36zttg8vldm2qxw039ulccr8nwy3hjg2sw5vk65e99lwuhrhw0nuya2u57qszltvx7egp74jydn",
+      "Have you seen this: lnbc12u1p3lvjeupp5a5ecgp45k6pa8tu7rnkgzfuwdy3l5ylv3k5tdzrg4cr8rj2f364sdq5g9kxy7fqd9h8vmmfvdjscqzpgxqyz5vqsp5zuzyetf33aphetf0e80w7tztw6dfsjs4lmvya4cyk8umfsx00qts9qyyssqke9hphcr36zvcav8wr502g0mhfhxpy8m9tt36zttg8vldm2qxw039ulccr8nwy3hjg2sw5vk65e99lwuhrhw0nuya2u57qszltvx7egp74jydn I think I have to pay", "pt"
+    )
+
+    assertTranslateContains(
+      "lnbc10u1p3l0wg0pp5y5y3vxt3429m28uuq56uqhwxadftn67yaarq06h3y9nqapz72n6sdqqxqyjw5q9q7sqqqqqqqqqqqqqqqqqqqqqqqqq9qsqsp5y2tazp42xde3c0tdsz30zqcekrt0lzrneszdtagy2qn7vs0d3p5qrzjqwryaup9lh50kkranzgcdnn2fgvx390wgj5jd07rwr3vxeje0glcll7jdvcln4lhw5qqqqlgqqqqqeqqjqdau9jzseecmvmh03h88xyf5f980xx45fmn0cej654v5jr79ye36pww90jwdda38damlmgt54v8rn6q9kywtw057rh4v3wwrmn8fajagqnssr7v",
+      "Test lnbc10u1p3l0wg0pp5y5y3vxt3429m28uuq56uqhwxadftn67yaarq06h3y9nqapz72n6sdqqxqyjw5q9q7sqqqqqqqqqqqqqqqqqqqqqqqqq9qsqsp5y2tazp42xde3c0tdsz30zqcekrt0lzrneszdtagy2qn7vs0d3p5qrzjqwryaup9lh50kkranzgcdnn2fgvx390wgj5jd07rwr3vxeje0glcll7jdvcln4lhw5qqqqlgqqqqqeqqjqdau9jzseecmvmh03h88xyf5f980xx45fmn0cej654v5jr79ye36pww90jwdda38damlmgt54v8rn6q9kywtw057rh4v3wwrmn8fajagqnssr7v", "pt"
+    )
+  }
+}

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

@@ -5,6 +5,7 @@ import androidx.compose.ui.text.AnnotatedString
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.UserMetadata
 import com.vitorpamplona.amethyst.model.decodePublicKey
 import com.vitorpamplona.amethyst.model.toHexKey
 import com.vitorpamplona.amethyst.ui.actions.buildAnnotatedStringWithUrlHighlighting
@@ -29,7 +30,8 @@ class EUrlUserTagTransformationTest {
   @Test
   fun transformationText() {
     val user = LocalCache.getOrCreateUser(decodePublicKey("npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z").toHexKey())
-    user.info.displayName = "Vitor Pamplona"
+    user.info = UserMetadata()
+    user.info?.displayName = "Vitor Pamplona"
 
     var transformedText = buildAnnotatedStringWithUrlHighlighting(
       AnnotatedString("New Hey @npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z"),
@@ -63,7 +65,8 @@ class EUrlUserTagTransformationTest {
   @Test
   fun transformationTextTwoKeys() {
     val user = LocalCache.getOrCreateUser(decodePublicKey("npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z").toHexKey())
-    user.info.displayName = "Vitor Pamplona"
+    user.info = UserMetadata()
+    user.info?.displayName = "Vitor Pamplona"
 
     var transformedText = buildAnnotatedStringWithUrlHighlighting(
       AnnotatedString("New Hey @npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z and @npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z"),

app/src/main/AndroidManifest.xml

@@ -24,7 +24,6 @@
         android:usesCleartextTraffic="true"
         tools:targetApi="33">
         <activity
-            android:label="@string/app_name"
             android:name=".ui.MainActivity"
             android:exported="true"
             android:windowSoftInputMode="adjustResize"
@@ -46,10 +45,6 @@
                 android:name="android.app.lib_name"
                 android:value="" />
         </activity>
-
-        <meta-data
-            android:name="com.google.mlkit.vision.DEPENDENCIES"
-            android:value="barcode" />
     </application>
 
 </manifest>

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

@@ -4,10 +4,13 @@ import android.content.Context
 import com.google.gson.GsonBuilder
 import com.google.gson.reflect.TypeToken
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.toByteArray
 import com.vitorpamplona.amethyst.model.RelaySetupInfo
+import com.vitorpamplona.amethyst.model.toByteArray
 import java.util.Locale
 import nostr.postr.Persona
+import nostr.postr.events.ContactListEvent
+import nostr.postr.events.Event
+import nostr.postr.events.Event.Companion.getRefinedEvent
 import nostr.postr.toHex
 
 class LocalPreferences(context: Context) {
@@ -22,7 +25,10 @@ class LocalPreferences(context: Context) {
       remove("hidden_users")
       remove("relays")
       remove("dontTranslateFrom")
+      remove("languagePreferences")
       remove("translateTo")
+      remove("zapAmounts")
+      remove("latestContactList")
     }.apply()
   }
 
@@ -34,7 +40,10 @@ class LocalPreferences(context: Context) {
       account.hiddenUsers.let { putStringSet("hidden_users", it) }
       account.localRelays.let { putString("relays", gson.toJson(it)) }
       account.dontTranslateFrom.let { putStringSet("dontTranslateFrom", it) }
+      account.languagePreferences.let { putString("languagePreferences", gson.toJson(it)) }
       account.translateTo.let { putString("translateTo", it) }
+      account.zapAmountChoices.let { putString("zapAmounts", gson.toJson(it)) }
+      account.backupContactList.let { putString("latestContactList", Event.gson.toJson(it)) }
     }.apply()
   }
 
@@ -52,6 +61,29 @@ class LocalPreferences(context: Context) {
       val dontTranslateFrom = getStringSet("dontTranslateFrom", null) ?: setOf()
       val translateTo = getString("translateTo", null) ?: Locale.getDefault().language
 
+      val zapAmountChoices = gson.fromJson(
+        getString("zapAmounts", "[]"),
+        object : TypeToken<List<Long>>() {}.type
+      ) ?: listOf(500L, 1000L, 5000L)
+
+      val latestContactList = try {
+        getString("latestContactList", null)?.let {
+          Event.gson.fromJson(it, Event::class.java).getRefinedEvent(true) as ContactListEvent
+        }
+      } catch (e: Throwable) {
+        e.printStackTrace()
+        null
+      }
+
+      val languagePreferences = try {
+        getString("languagePreferences", null)?.let {
+          gson.fromJson(it, object : TypeToken<Map<String, String>>() {}.type) as Map<String, String>
+        } ?: mapOf<String,String>()
+      } catch (e: Throwable) {
+        e.printStackTrace()
+        mapOf<String,String>()
+      }
+
       if (pubKey != null) {
         return Account(
           Persona(privKey = privKey?.toByteArray(), pubKey = pubKey.toByteArray()),
@@ -59,7 +91,10 @@ class LocalPreferences(context: Context) {
           hiddenUsers,
           localRelays,
           dontTranslateFrom,
-          translateTo
+          languagePreferences,
+          translateTo,
+          zapAmountChoices,
+          latestContactList
         )
       } else {
         return null

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

@@ -2,12 +2,14 @@ package com.vitorpamplona.amethyst
 
 import android.content.Context
 import androidx.lifecycle.LiveData
-import com.vitorpamplona.amethyst.model.Note
+import java.util.concurrent.atomic.AtomicBoolean
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 object NotificationCache {
   val lastReadByRoute = mutableMapOf<String, Long>()
@@ -20,7 +22,7 @@ object NotificationCache {
       val scope = CoroutineScope(Job() + Dispatchers.IO)
       scope.launch {
         LocalPreferences(context).saveLastRead(route, timestampInSecs)
-        invalidateData()
+        live.invalidateData()
       }
     }
   }
@@ -36,24 +38,31 @@ object NotificationCache {
 
   // Observers line up here.
   val live: NotificationLiveData = NotificationLiveData(this)
-
-  // Refreshes observers in batches.
-  var handlerWaiting = false
-  @Synchronized
-  fun invalidateData() {
-    if (handlerWaiting) return
-
-    handlerWaiting = true
-    val scope = CoroutineScope(Job() + Dispatchers.Default)
-    scope.launch {
-      delay(100)
-      live.refresh()
-      handlerWaiting = false
-    }
-  }
 }
 
 class NotificationLiveData(val cache: NotificationCache): LiveData<NotificationState>(NotificationState(cache)) {
+  // Refreshes observers in batches.
+  var handlerWaiting = AtomicBoolean()
+
+  @Synchronized
+  fun invalidateData() {
+    if (!hasActiveObservers()) return
+    if (handlerWaiting.getAndSet(true)) return
+
+    handlerWaiting.set(true)
+    val scope = CoroutineScope(Job() + Dispatchers.Main)
+    scope.launch {
+      try {
+        delay(100)
+        refresh()
+      } finally {
+        withContext(NonCancellable) {
+          handlerWaiting.set(false)
+        }
+      }
+    }
+  }
+
   fun refresh() {
     postValue(NotificationState(cache))
   }

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

@@ -0,0 +1,27 @@
+package com.vitorpamplona.amethyst
+
+import android.content.Context
+import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.asImageBitmap
+import java.util.UUID
+import name.neuhalfen.projects.android.robohash.RoboHash
+
+object RoboHashCache {
+
+  lateinit var robots: RoboHash
+
+  lateinit var defaultAvatar: ImageBitmap
+
+  @Synchronized
+  fun get(context: Context, hash: String): ImageBitmap {
+    if (!this::robots.isInitialized) {
+      robots = RoboHash(context)
+      //robots.useCache(LruCache(100));
+
+      defaultAvatar = robots.imageForHandle(robots.calculateHandleFromUUID(UUID.nameUUIDFromBytes("aaaa".toByteArray()))).asImageBitmap()
+    }
+
+    return defaultAvatar
+  }
+
+}

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

@@ -1,21 +1,19 @@
 package com.vitorpamplona.amethyst
 
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.service.relays.Constants
+import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.service.NostrAccountDataSource
 import com.vitorpamplona.amethyst.service.NostrChannelDataSource
 import com.vitorpamplona.amethyst.service.NostrChatroomListDataSource
 import com.vitorpamplona.amethyst.service.NostrGlobalDataSource
 import com.vitorpamplona.amethyst.service.NostrHomeDataSource
-import com.vitorpamplona.amethyst.service.NostrNotificationDataSource
 import com.vitorpamplona.amethyst.service.NostrSingleChannelDataSource
 import com.vitorpamplona.amethyst.service.NostrSingleEventDataSource
 import com.vitorpamplona.amethyst.service.NostrSingleUserDataSource
 import com.vitorpamplona.amethyst.service.NostrThreadDataSource
 import com.vitorpamplona.amethyst.service.NostrUserProfileDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileFollowersDataSource
-import com.vitorpamplona.amethyst.service.NostrUserProfileFollowsDataSource
 import com.vitorpamplona.amethyst.service.relays.Client
+import com.vitorpamplona.amethyst.service.relays.Constants
 
 object ServiceManager {
   private var account: Account? = null
@@ -29,30 +27,23 @@ object ServiceManager {
     val myAccount = account
 
     if (myAccount != null) {
-      Client.connect(myAccount.convertLocalRelays())
+      Client.connect(myAccount.activeRelays() ?: myAccount.convertLocalRelays())
 
       // start services
       NostrAccountDataSource.account = myAccount
       NostrHomeDataSource.account = myAccount
-      NostrNotificationDataSource.account = myAccount
       NostrChatroomListDataSource.account = myAccount
-
       NostrGlobalDataSource.account = myAccount
-      NostrChannelDataSource.account = myAccount
-
-      NostrUserProfileDataSource.account = myAccount
-      NostrUserProfileFollowsDataSource.account = myAccount
-      NostrUserProfileFollowersDataSource.account = myAccount
 
+      // Notification Elements
       NostrAccountDataSource.start()
-      NostrGlobalDataSource.start()
       NostrHomeDataSource.start()
-      NostrNotificationDataSource.start()
+      NostrChatroomListDataSource.start()
+
+      // More Info Data Sources
       NostrSingleEventDataSource.start()
       NostrSingleChannelDataSource.start()
       NostrSingleUserDataSource.start()
-      NostrThreadDataSource.start()
-      NostrChatroomListDataSource.start()
     } else {
       // if not logged in yet, start a basic service wit default relays
       Client.connect(Constants.convertDefaultRelays())
@@ -65,17 +56,25 @@ object ServiceManager {
     NostrChannelDataSource.stop()
     NostrChatroomListDataSource.stop()
     NostrUserProfileDataSource.stop()
-    NostrUserProfileFollowersDataSource.stop()
-    NostrUserProfileFollowsDataSource.stop()
 
     NostrGlobalDataSource.stop()
-    NostrNotificationDataSource.stop()
     NostrSingleChannelDataSource.stop()
     NostrSingleEventDataSource.stop()
     NostrSingleUserDataSource.stop()
     NostrThreadDataSource.stop()
+    NostrUserProfileDataSource.stop()
 
     Client.disconnect()
   }
 
+  fun cleanUp() {
+    LocalCache.cleanObservers()
+
+    account?.let {
+      LocalCache.pruneOldAndHiddenMessages(it)
+      LocalCache.pruneHiddenMessages(it)
+      //LocalCache.pruneNonFollows(it)
+    }
+  }
+
 }

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

@@ -0,0 +1,41 @@
+package com.vitorpamplona.amethyst
+
+import android.content.Context
+import com.google.android.exoplayer2.database.StandaloneDatabaseProvider
+import com.google.android.exoplayer2.upstream.DefaultHttpDataSource
+import com.google.android.exoplayer2.upstream.cache.CacheDataSource
+import com.google.android.exoplayer2.upstream.cache.LeastRecentlyUsedCacheEvictor
+import com.google.android.exoplayer2.upstream.cache.SimpleCache
+
+object VideoCache {
+
+  var exoPlayerCacheSize: Long = 90 * 1024 * 1024 // 90MB
+
+  var leastRecentlyUsedCacheEvictor = LeastRecentlyUsedCacheEvictor(exoPlayerCacheSize)
+
+  lateinit var exoDatabaseProvider: StandaloneDatabaseProvider
+  lateinit var simpleCache: SimpleCache
+
+  lateinit var cacheDataSourceFactory: CacheDataSource.Factory
+
+  fun get(context: Context): CacheDataSource.Factory {
+    if (!this::simpleCache.isInitialized) {
+      exoDatabaseProvider = StandaloneDatabaseProvider(context)
+
+      simpleCache = SimpleCache(
+        context.cacheDir,
+        leastRecentlyUsedCacheEvictor,
+        exoDatabaseProvider
+      )
+
+      cacheDataSourceFactory = CacheDataSource.Factory()
+        .setCache(simpleCache)
+        .setUpstreamDataSourceFactory(
+          DefaultHttpDataSource.Factory().setAllowCrossProtocolRedirects(true)
+        )
+        .setFlags(CacheDataSource.FLAG_IGNORE_CACHE_ON_ERROR)
+    }
+
+    return cacheDataSourceFactory
+  }
+}

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

@@ -1,106 +0,0 @@
-package com.vitorpamplona.amethyst.lnurl
-
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
-import kotlin.math.ln
-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.OkHttpClient
-import okhttp3.Request
-import okhttp3.Response
-
-class LightningAddressResolver {
-  val client = OkHttpClient.Builder().build()
-
-  fun assembleUrl(lnaddress: String): String? {
-    val parts = lnaddress.split("@")
-
-    if (parts.size != 2) {
-      return null
-    }
-
-    return "https://${parts[1]}/.well-known/lnurlp/${parts[0]}"
-  }
-
-  fun fetchLightningAddressJson(lnaddress: String, onSucess: (String) -> Unit) {
-    val scope = CoroutineScope(Job() + Dispatchers.IO)
-    scope.launch {
-      fetchLightningAddressJsonSuspend(lnaddress, onSucess)
-    }
-  }
-
-  private suspend fun fetchLightningAddressJsonSuspend(lnaddress: String, onSucess: (String) -> Unit) {
-    val url = assembleUrl(lnaddress) ?: return
-
-    withContext(Dispatchers.IO) {
-      val request: Request = Request.Builder().url(url).build()
-
-      client.newCall(request).enqueue(object : Callback {
-        override fun onResponse(call: Call, response: Response) {
-          response.use {
-            onSucess(response.body.string())
-          }
-        }
-
-        override fun onFailure(call: Call, e: java.io.IOException) {
-          e.printStackTrace()
-        }
-      })
-    }
-  }
-
-  fun fetchLightningInvoice(lnCallback: String, milliSats: Long, message: String, onSucess: (String) -> Unit) {
-    val scope = CoroutineScope(Job() + Dispatchers.IO)
-    scope.launch {
-      fetchLightningInvoiceSuspend(lnCallback, milliSats, message, onSucess)
-    }
-  }
-
-  private suspend fun fetchLightningInvoiceSuspend(lnCallback: String, milliSats: Long, message: String, onSucess: (String) -> Unit) {
-    val urlBinder = if (lnCallback.contains("?")) "&" else "?"
-    val url = "$lnCallback${urlBinder}amount=$milliSats&comment=$message"
-
-    withContext(Dispatchers.IO) {
-      val request: Request = Request.Builder().url(url).build()
-
-      client.newCall(request).enqueue(object : Callback {
-        override fun onResponse(call: Call, response: Response) {
-          response.use {
-            onSucess(response.body.string())
-          }
-        }
-
-        override fun onFailure(call: Call, e: java.io.IOException) {
-          e.printStackTrace()
-        }
-      })
-    }
-  }
-
-  fun lnAddressToLnUrl(lnaddress: String, onSucess: (String) -> Unit) {
-    fetchLightningAddressJson(lnaddress) {
-      onSucess(Bech32.encodeBytes("lnurl",it.toByteArray(), Bech32.Encoding.Bech32))
-    }
-  }
-
-  fun lnAddressInvoice(lnaddress: String, milliSats: Long, message: String, onSucess: (String) -> Unit) {
-    val mapper = jacksonObjectMapper()
-
-    fetchLightningAddressJson(lnaddress) {
-      mapper.readTree(it)?.get("callback")?.asText()?.let { callback ->
-        fetchLightningInvoice(callback, milliSats, message,
-          onSucess = {
-            mapper.readTree(it)?.get("pr")?.asText()?.let { pr ->
-              onSucess(pr)
-            }
-          }
-        )
-      }
-    }
-  }
-}

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

@@ -3,14 +3,15 @@ package com.vitorpamplona.amethyst.model
 import android.content.res.Resources
 import androidx.core.os.ConfigurationCompat
 import androidx.lifecycle.LiveData
-import com.vitorpamplona.amethyst.service.relays.Constants
 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.LnZapRequestEvent
 import com.vitorpamplona.amethyst.service.model.ReactionEvent
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
 import com.vitorpamplona.amethyst.service.relays.Client
+import com.vitorpamplona.amethyst.service.relays.Constants
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.service.relays.RelayPool
@@ -19,13 +20,17 @@ import java.util.Locale
 import java.util.concurrent.atomic.AtomicBoolean
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import nostr.postr.Contact
 import nostr.postr.Persona
 import nostr.postr.Utils
 import nostr.postr.events.ContactListEvent
+import nostr.postr.events.DeletionEvent
 import nostr.postr.events.Event
 import nostr.postr.events.MetadataEvent
 import nostr.postr.events.PrivateDmEvent
@@ -52,8 +57,18 @@ class Account(
   var hiddenUsers: Set<String> = setOf(),
   var localRelays: Set<RelaySetupInfo> = Constants.defaultRelays.toSet(),
   var dontTranslateFrom: Set<String> = getLanguagesSpokenByUser(),
-  var translateTo: String = Locale.getDefault().language
+  var languagePreferences: Map<String, String> = mapOf(),
+  var translateTo: String = Locale.getDefault().language,
+  var zapAmountChoices: List<Long> = listOf(500L, 1000L, 5000L),
+  var backupContactList: ContactListEvent? = null
 ) {
+  var transientHiddenUsers: Set<String> = setOf()
+
+  // Observers line up here.
+  val live: AccountLiveData = AccountLiveData(this)
+  val liveLanguages: AccountLiveData = AccountLiveData(this)
+  val saveable: AccountLiveData = AccountLiveData(this)
+
   fun userProfile(): User {
     return LocalCache.getOrCreateUser(loggedIn.pubKey.toHexKey())
   }
@@ -63,7 +78,7 @@ class Account(
   }
 
   fun hiddenUsers(): List<User> {
-    return hiddenUsers.map { LocalCache.getOrCreateUser(it) }
+    return (hiddenUsers + transientHiddenUsers).map { LocalCache.getOrCreateUser(it) }
   }
 
   fun isWriteable(): Boolean {
@@ -73,18 +88,23 @@ class Account(
   fun sendNewRelayList(relays: Map<String, ContactListEvent.ReadWrite>) {
     if (!isWriteable()) return
 
-    val lastestContactList = userProfile().latestContactList
-    val event = if (lastestContactList != null) {
-      ContactListEvent.create(
-        lastestContactList.follows,
+    val contactList = userProfile().latestContactList
+
+    if (contactList != null && contactList.follows.size > 0) {
+      val event = ContactListEvent.create(
+        contactList.follows,
         relays,
         loggedIn.privKey!!)
-    } else {
-      ContactListEvent.create(listOf(), relays, loggedIn.privKey!!)
-    }
 
-    Client.send(event)
-    LocalCache.consume(event)
+      Client.send(event)
+      LocalCache.consume(event)
+    } else {
+      val event = ContactListEvent.create(listOf(), relays, loggedIn.privKey!!)
+
+      // Keep this local to avoid erasing a good contact list.
+      // Client.send(event)
+      LocalCache.consume(event)
+    }
   }
 
   fun sendNewUserMetadata(toString: String) {
@@ -104,10 +124,26 @@ class Account(
     }
   }
 
+  fun reactionTo(note: Note): List<Note> {
+    return note.reactedBy(userProfile(), "+")
+  }
+
+  fun hasBoosted(note: Note): Boolean {
+    return boostsTo(note).isNotEmpty()
+  }
+
+  fun boostsTo(note: Note): List<Note> {
+    return note.boostedBy(userProfile())
+  }
+
+  fun hasReacted(note: Note): Boolean {
+    return note.hasReacted(userProfile(), "+")
+  }
+
   fun reactTo(note: Note) {
     if (!isWriteable()) return
 
-    if (note.hasReacted(userProfile(), "+")) {
+    if (hasReacted(note)) {
       // has already liked this note
       return
     }
@@ -119,6 +155,26 @@ class Account(
     }
   }
 
+  fun createZapRequestFor(note: Note): LnZapRequestEvent? {
+    if (!isWriteable()) return null
+
+    note.event?.let {
+      return LnZapRequestEvent.create(it, userProfile().relays?.keys?.ifEmpty { null } ?: localRelays.map { it.url }.toSet(), loggedIn.privKey!!)
+    }
+
+    return null
+  }
+
+  fun createZapRequestFor(user: User): LnZapRequestEvent? {
+    return createZapRequestFor(user.pubkeyHex)
+  }
+
+  fun createZapRequestFor(userPubKeyHex: String): LnZapRequestEvent? {
+    if (!isWriteable()) return null
+
+    return LnZapRequestEvent.create(userPubKeyHex, userProfile().relays?.keys?.ifEmpty { null } ?: localRelays.map { it.url }.toSet(), loggedIn.privKey!!)
+  }
+
   fun report(note: Note, type: ReportEvent.ReportType) {
     if (!isWriteable()) return
 
@@ -136,7 +192,7 @@ class Account(
     note.event?.let {
       val event = ReportEvent.create(it, type, loggedIn.privKey!!)
       Client.send(event)
-      LocalCache.consume(event)
+      LocalCache.consume(event, null)
     }
   }
 
@@ -150,13 +206,29 @@ class Account(
 
     val event = ReportEvent.create(user.pubkeyHex, type, loggedIn.privKey!!)
     Client.send(event)
-    LocalCache.consume(event)
+    LocalCache.consume(event, null)
+  }
+
+  fun delete(note: Note) {
+    delete(listOf(note))
+  }
+
+  fun delete(notes: List<Note>) {
+    if (!isWriteable()) return
+
+    val myNotes = notes.filter { it.author == userProfile() }.map { it.idHex }
+
+    if (myNotes.isNotEmpty()) {
+      val event = DeletionEvent.create(myNotes, loggedIn.privKey!!)
+      Client.send(event)
+      LocalCache.consume(event)
+    }
   }
 
   fun boost(note: Note) {
     if (!isWriteable()) return
 
-    if (note.hasBoosted(userProfile())) {
+    if (note.hasBoostedInTheLast5Minutes(userProfile())) {
       // has already bosted in the past 5mins 
       return
     }
@@ -177,10 +249,11 @@ class Account(
   fun follow(user: User) {
     if (!isWriteable()) return
 
-    val lastestContactList = userProfile().latestContactList
-    val event = if (lastestContactList != null) {
+    val contactList = userProfile().latestContactList
+
+    val event = if (contactList != null && contactList.follows.size > 0) {
       ContactListEvent.create(
-        lastestContactList.follows.plus(Contact(user.pubkeyHex, null)),
+        contactList.follows.plus(Contact(user.pubkeyHex, null)),
         userProfile().relays,
         loggedIn.privKey!!)
     } else {
@@ -199,12 +272,14 @@ class Account(
   fun unfollow(user: User) {
     if (!isWriteable()) return
 
-    val lastestContactList = userProfile().latestContactList
-    if (lastestContactList != null) {
+    val contactList = userProfile().latestContactList
+
+    if (contactList != null && contactList.follows.size > 0) {
       val event = ContactListEvent.create(
-        lastestContactList.follows.filter { it.pubKeyHex != user.pubkeyHex },
+        contactList.follows.filter { it.pubKeyHex != user.pubkeyHex },
         userProfile().relays,
         loggedIn.privKey!!)
+
       Client.send(event)
       LocalCache.consume(event)
     }
@@ -243,14 +318,50 @@ class Account(
     LocalCache.consume(signedEvent, null)
   }
 
+  fun createPrivateMessageWithReply(
+    recipientPubKey: ByteArray,
+    msg: String,
+    replyTos: List<String>? = null, mentions: List<String>? = null,
+    privateKey: ByteArray,
+    createdAt: Long = Date().time / 1000,
+    publishedRecipientPubKey: ByteArray? = null,
+    advertiseNip18: Boolean = true
+  ): PrivateDmEvent {
+    val content = Utils.encrypt(
+      if (advertiseNip18) {
+        PrivateDmEvent.nip18Advertisement
+      } else { "" } + msg,
+      privateKey,
+      recipientPubKey)
+    val pubKey = Utils.pubkeyCreate(privateKey)
+    val tags = mutableListOf<List<String>>()
+    publishedRecipientPubKey?.let {
+      tags.add(listOf("p", publishedRecipientPubKey.toHex()))
+    }
+    replyTos?.forEach {
+      tags.add(listOf("e", it))
+    }
+    mentions?.forEach {
+      tags.add(listOf("p", it))
+    }
+    val id = Event.generateId(pubKey, createdAt, PrivateDmEvent.kind, tags, content)
+    val sig = Utils.sign(id, privateKey)
+    return PrivateDmEvent(id, pubKey, createdAt, tags, content, sig)
+  }
+
   fun sendPrivateMeesage(message: String, toUser: String, replyingTo: Note? = null) {
     if (!isWriteable()) return
     val user = LocalCache.users[toUser] ?: return
 
-    val signedEvent = PrivateDmEvent.create(
-      recipientPubKey = user.pubkey,
-      publishedRecipientPubKey = user.pubkey,
+    val repliesToHex = listOfNotNull(replyingTo?.idHex).ifEmpty { null }
+    val mentionsHex = emptyList<String>()
+
+    val signedEvent = createPrivateMessageWithReply(
+      recipientPubKey = user.pubkey(),
+      publishedRecipientPubKey = user.pubkey(),
       msg = message,
+      replyTos = repliesToHex,
+      mentions = mentionsHex,
       privateKey = loggedIn.privKey!!,
       advertiseNip18 = false
     )
@@ -278,22 +389,35 @@ class Account(
 
   fun joinChannel(idHex: String) {
     followingChannels = followingChannels + idHex
-    invalidateData(live)
+    live.invalidateData()
+
+    saveable.invalidateData()
   }
 
   fun leaveChannel(idHex: String) {
     followingChannels = followingChannels - idHex
-    invalidateData(live)
+    live.invalidateData()
+
+    saveable.invalidateData()
   }
 
   fun hideUser(pubkeyHex: String) {
     hiddenUsers = hiddenUsers + pubkeyHex
-    invalidateData(live)
+    live.invalidateData()
+    saveable.invalidateData()
   }
 
   fun showUser(pubkeyHex: String) {
     hiddenUsers = hiddenUsers - pubkeyHex
-    invalidateData(live)
+    transientHiddenUsers = transientHiddenUsers - pubkeyHex
+    live.invalidateData()
+    saveable.invalidateData()
+  }
+
+  fun changeZapAmounts(newAmounts: List<Long>) {
+    zapAmountChoices = newAmounts
+    live.invalidateData()
+    saveable.invalidateData()
   }
 
   fun sendChangeChannel(name: String, about: String, picture: String, channel: Channel) {
@@ -347,12 +471,35 @@ class Account(
 
   fun addDontTranslateFrom(languageCode: String) {
     dontTranslateFrom = dontTranslateFrom.plus(languageCode)
-    invalidateData(liveLanguages)
+    liveLanguages.invalidateData()
+
+    saveable.invalidateData()
   }
 
   fun updateTranslateTo(languageCode: String) {
     translateTo = languageCode
-    invalidateData(liveLanguages)
+    liveLanguages.invalidateData()
+
+    saveable.invalidateData()
+  }
+
+  fun prefer(source: String, target: String, preference: String) {
+    languagePreferences = languagePreferences + Pair("$source,$target", preference)
+    saveable.invalidateData()
+  }
+
+  fun preferenceBetween(source: String, target: String): String? {
+    return languagePreferences.get("$source,$target")
+  }
+
+  private fun updateContactListTo(newContactList: ContactListEvent?) {
+    if (newContactList?.follows.isNullOrEmpty()) return
+
+    // Events might be different objects, we have to compare their ids.
+    if (backupContactList?.id?.toHex() != newContactList?.id?.toHex()) {
+      backupContactList = newContactList
+      saveable.invalidateData()
+    }
   }
 
   fun activeRelays(): Array<Relay>? {
@@ -368,46 +515,26 @@ class Account(
     }.toTypedArray()
   }
 
-  init {
-    userProfile().subscribe(object: User.Listener() {
-      override fun onRelayChange() {
-        Client.disconnect()
-        Client.connect(activeRelays() ?: convertLocalRelays())
-        RelayPool.requestAndWatch()
-      }
-    })
-  }
-
-  // Observers line up here.
-  val live: AccountLiveData = AccountLiveData(this)
-  val liveLanguages: AccountLiveData = AccountLiveData(this)
-
-  var handlerWaiting = AtomicBoolean()
-
-  @Synchronized
-  private fun invalidateData(live: AccountLiveData) {
-    if (handlerWaiting.getAndSet(true)) return
-
-    handlerWaiting.set(true)
-    val scope = CoroutineScope(Job() + Dispatchers.Default)
-    scope.launch {
-      delay(100)
-      live.refresh()
-      handlerWaiting.set(false)
+  fun reconnectIfRelaysHaveChanged() {
+    val newRelaySet = activeRelays() ?: convertLocalRelays()
+    if (!Client.isSameRelaySetConfig(newRelaySet)) {
+      Client.disconnect()
+      Client.connect(newRelaySet)
+      RelayPool.requestAndWatch()
     }
   }
 
-  fun isHidden(user: User) = user in hiddenUsers()
+  fun isHidden(user: User) = user.pubkeyHex in hiddenUsers || user.pubkeyHex in transientHiddenUsers
 
   fun isAcceptable(user: User): Boolean {
-    return user !in hiddenUsers()  // if user hasn't hided this author
+    return !isHidden(user)  // if user hasn't hided this author
         && user.reportsBy( userProfile() ).isEmpty() // if user has not reported this post
-        && user.reportsBy( userProfile().follows ).size < 5
+        && user.reportAuthorsBy( userProfile().follows ).size < 5
   }
 
   fun isAcceptableDirect(note: Note): Boolean {
     return note.reportsBy( userProfile() ).isEmpty()  // if user has not reported this post
-        && note.reportsBy( userProfile().follows ).size < 5 // if it has 5 reports by reliable users
+        && note.reportAuthorsBy( userProfile().follows ).size < 5 // if it has 5 reports by reliable users
   }
 
   fun isAcceptable(note: Note): Boolean {
@@ -435,10 +562,67 @@ class Account(
   fun saveRelayList(value: List<RelaySetupInfo>) {
     localRelays = value.toSet()
     sendNewRelayList(value.associate { it.url to ContactListEvent.ReadWrite(it.read, it.write) } )
+
+    saveable.invalidateData()
+  }
+
+  init {
+    backupContactList?.let {
+      println("Loading saved contacts ${it.toJson()}")
+      if (userProfile().latestContactList == null) {
+        LocalCache.consume(it)
+      }
+    }
+
+    // Observes relays to restart connections
+    userProfile().live().relays.observeForever {
+      GlobalScope.launch(Dispatchers.IO) {
+        reconnectIfRelaysHaveChanged()
+      }
+    }
+
+    // saves contact list for the next time.
+    userProfile().live().follows.observeForever {
+      updateContactListTo(userProfile().latestContactList)
+    }
+
+    // imports transient blocks due to spam.
+    LocalCache.antiSpam.liveSpam.observeForever {
+      GlobalScope.launch(Dispatchers.IO) {
+        it.cache.spamMessages.snapshot().values.forEach {
+          if (it.pubkeyHex !in transientHiddenUsers && it.duplicatedMessages.size >= 5) {
+            val userToBlock = LocalCache.getOrCreateUser(it.pubkeyHex)
+            if (userToBlock != userProfile() && userToBlock !in userProfile().follows) {
+              transientHiddenUsers = transientHiddenUsers + it.pubkeyHex
+            }
+          }
+        }
+      }
+    }
   }
 }
 
 class AccountLiveData(private val account: Account): LiveData<AccountState>(AccountState(account)) {
+  var handlerWaiting = AtomicBoolean()
+
+  @Synchronized
+  fun invalidateData() {
+    if (handlerWaiting.getAndSet(true)) return
+
+    handlerWaiting.set(true)
+    val scope = CoroutineScope(Job() + Dispatchers.Default)
+    scope.launch {
+      try {
+        delay(100)
+        refresh()
+      } finally {
+        withContext(NonCancellable) {
+          handlerWaiting.set(false)
+        }
+      }
+    }
+  }
+
   fun refresh() {
     postValue(AccountState(account))
   }

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

@@ -0,0 +1,96 @@
+package com.vitorpamplona.amethyst.model
+
+import android.util.Log
+import android.util.LruCache
+import androidx.lifecycle.LiveData
+import java.util.concurrent.atomic.AtomicBoolean
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import nostr.postr.events.Event
+import nostr.postr.toHex
+
+data class Spammer(val pubkeyHex: HexKey, var duplicatedMessages: Set<HexKey>)
+
+class AntiSpamFilter {
+  val recentMessages = LruCache<Int, String>(1000)
+  val spamMessages = LruCache<Int, Spammer>(1000)
+
+  @Synchronized
+  fun isSpam(event: Event): Boolean {
+    val idHex = event.id.toHexKey()
+
+    // if already processed, ok
+    if (LocalCache.notes[idHex] != null) return false
+
+    // if short message, ok
+    if (event.content.length < 50) return false
+
+    // double list strategy:
+    // if duplicated, it goes into spam. 1000 spam messages are saved into the spam list.
+
+    // Considers tags so that same replies to different people don't count.
+    val hash = (event.content + event.tags.flatten().joinToString(",")).hashCode()
+
+    if ((recentMessages[hash] != null && recentMessages[hash] != idHex) || spamMessages[hash] != null) {
+      Log.w("Potential SPAM Message", "${event.id.toHex()} ${recentMessages[hash]} ${spamMessages[hash] != null} ${event.content.replace("\n", " | ")}")
+
+      // Log down offenders
+      if (spamMessages.get(hash) == null) {
+        spamMessages.put(hash, Spammer(event.pubKey.toHexKey(), setOf(recentMessages[hash], event.id.toHex())))
+        liveSpam.invalidateData()
+      } else {
+        val spammer = spamMessages.get(hash)
+        spammer.duplicatedMessages = spammer.duplicatedMessages + event.id.toHex()
+
+        liveSpam.invalidateData()
+      }
+
+      return true
+    }
+
+    recentMessages.put(hash, idHex)
+
+    return false
+  }
+
+  val liveSpam: AntiSpamLiveData = AntiSpamLiveData(this)
+}
+
+
+class AntiSpamLiveData(val cache: AntiSpamFilter): LiveData<AntiSpamState>(AntiSpamState(cache)) {
+
+  // Refreshes observers in batches.
+  var handlerWaiting = AtomicBoolean()
+
+  @Synchronized
+  fun invalidateData() {
+    if (!hasActiveObservers()) return
+    if (handlerWaiting.getAndSet(true)) return
+
+    handlerWaiting.set(true)
+    val scope = CoroutineScope(Job() + Dispatchers.Main)
+    scope.launch {
+      try {
+        delay(100)
+        refresh()
+      } finally {
+        withContext(NonCancellable) {
+          handlerWaiting.set(false)
+        }
+      }
+    }
+  }
+
+  private fun refresh() {
+    postValue(AntiSpamState(cache))
+  }
+}
+
+class AntiSpamState(val cache: AntiSpamFilter) {
+
+}

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

@@ -1,15 +1,13 @@
 package com.vitorpamplona.amethyst.model
 
 import androidx.lifecycle.LiveData
-import com.vitorpamplona.amethyst.service.NostrSingleEventDataSource
+import com.vitorpamplona.amethyst.service.NostrSingleChannelDataSource
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
+import fr.acinq.secp256k1.Hex
 import java.util.concurrent.ConcurrentHashMap
 
-class Channel(val id: ByteArray) {
-    val idHex = id.toHexKey()
-    val idDisplayHex = id.toShortenHex()
-
+class Channel(val idHex: String) {
     var creator: User? = null
     var info = ChannelCreateEvent.ChannelData(null, null, null)
 
@@ -17,8 +15,12 @@ class Channel(val id: ByteArray) {
 
     val notes = ConcurrentHashMap<HexKey, Note>()
 
+    fun id() = Hex.decode(idHex)
+    fun idNote() = id().toNote()
+    fun idDisplayNote() = idNote().toShortenHex()
+
     fun toBestDisplayName(): String {
-        return info.name ?: idDisplayHex
+        return info.name ?: idDisplayNote()
     }
 
     @Synchronized
@@ -34,9 +36,9 @@ class Channel(val id: ByteArray) {
         live.refresh()
     }
 
-    fun profilePicture(): String {
+    fun profilePicture(): String? {
         if (info.picture.isNullOrBlank()) info.picture = null
-        return info.picture ?: "https://robohash.org/${idHex}.png"
+        return info.picture
     }
 
     fun anyNameStartsWith(prefix: String): Boolean {
@@ -47,8 +49,21 @@ class Channel(val id: ByteArray) {
     // Observers line up here.
     val live: ChannelLiveData = ChannelLiveData(this)
 
-    private fun refreshObservers() {
-        live.refresh()
+    fun pruneOldAndHiddenMessages(account: Account): Set<Note> {
+        val important = notes.values
+            .filter { it.author?.let { it1 -> account.isHidden(it1) } == false }
+            .sortedBy { it.event?.createdAt }
+            .reversed()
+            .take(1000)
+            .toSet()
+
+        val toBeRemoved = notes.values.filter { it !in important }.toSet()
+
+        toBeRemoved.forEach {
+            notes.remove(it.idHex)
+        }
+
+        return toBeRemoved
     }
 }
 
@@ -60,12 +75,12 @@ class ChannelLiveData(val channel: Channel): LiveData<ChannelState>(ChannelState
 
     override fun onActive() {
         super.onActive()
-        NostrSingleEventDataSource.add(channel.idHex)
+        NostrSingleChannelDataSource.add(channel.idHex)
     }
 
     override fun onInactive() {
         super.onInactive()
-        NostrSingleEventDataSource.remove(channel.idHex)
+        NostrSingleChannelDataSource.remove(channel.idHex)
     }
 }
 

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

@@ -2,7 +2,6 @@ package com.vitorpamplona.amethyst.model
 
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 import fr.acinq.secp256k1.Hex
-import java.util.regex.Pattern
 import nostr.postr.Bech32
 import nostr.postr.Persona
 import nostr.postr.bechToBytes
@@ -41,8 +40,43 @@ fun decodePublicKey(key: String): ByteArray {
     Persona(privKey = key.bechToBytes()).pubKey
   } else if (key.startsWith("npub")) {
     key.bechToBytes()
+  } else if (key.startsWith("note")) {
+    key.bechToBytes()
   } else { //if (pattern.matcher(key).matches()) {
   //} else {
     Hex.decode(key)
   }
+}
+
+data class DirtyKeyInfo(val type: String, val keyHex: String, 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)) {
+      return DirtyKeyInfo("npub", Persona(privKey = keyB32.bechToBytes()).pubKey.toHexKey(), restOfWord)
+    } else if (key.startsWith("npub1", true)) {
+      return DirtyKeyInfo("npub", keyB32.bechToBytes().toHexKey(), restOfWord)
+    } else if (key.startsWith("note1", true)) {
+      return DirtyKeyInfo("note", keyB32.bechToBytes().toHexKey(), restOfWord)
+    }
+
+  } catch (e: Exception) {
+    e.printStackTrace()
+  }
+
+  return null
 }

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

@@ -10,16 +10,26 @@ import com.vitorpamplona.amethyst.service.model.ChannelHideMessageEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMetadataEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMuteUserEvent
+import com.vitorpamplona.amethyst.service.model.LnZapEvent
+import com.vitorpamplona.amethyst.service.model.LnZapRequestEvent
 import com.vitorpamplona.amethyst.service.model.ReactionEvent
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
+import com.vitorpamplona.amethyst.service.relays.Relay
+import fr.acinq.secp256k1.Hex
 import java.io.ByteArrayInputStream
 import java.time.Instant
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
-import java.util.Collections
 import java.util.concurrent.ConcurrentHashMap
-import com.vitorpamplona.amethyst.service.relays.Relay
+import java.util.concurrent.atomic.AtomicBoolean
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import nostr.postr.events.ContactListEvent
 import nostr.postr.events.DeletionEvent
 import nostr.postr.events.Event
@@ -36,10 +46,22 @@ object LocalCache {
     .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
     .readerFor(UserMetadata::class.java)
 
+  val antiSpam = AntiSpamFilter()
+
   val users = ConcurrentHashMap<HexKey, User>()
   val notes = ConcurrentHashMap<HexKey, Note>()
   val channels = ConcurrentHashMap<HexKey, Channel>()
 
+  fun checkGetOrCreateUser(key: String): User? {
+    return try {
+      val checkHex = Hex.decode(key).toNpub() // Checks if this is a valid Hex
+      getOrCreateUser(key)
+    } catch (e: IllegalArgumentException) {
+      Log.e("LocalCache", "Invalid Key to create user: $key", e)
+      null
+    }
+  }
+
   @Synchronized
   fun getOrCreateUser(key: HexKey): User {
     return users[key] ?: run {
@@ -49,6 +71,16 @@ object LocalCache {
     }
   }
 
+  fun checkGetOrCreateNote(key: String): Note? {
+    return try {
+      val checkHex = Hex.decode(key).toNote() // Checks if this is a valid Hex
+      getOrCreateNote(key)
+    } catch (e: IllegalArgumentException) {
+      Log.e("LocalCache", "Invalid Key to create note: $key", e)
+      null
+    }
+  }
+
   @Synchronized
   fun getOrCreateNote(idHex: String): Note {
     return notes[idHex] ?: run {
@@ -58,10 +90,21 @@ object LocalCache {
     }
   }
 
+  fun checkGetOrCreateChannel(key: String): Channel? {
+    return try {
+      val checkHex = Hex.decode(key).toNote() // Checks if this is a valid Hex
+      getOrCreateChannel(key)
+    } catch (e: IllegalArgumentException) {
+      Log.e("LocalCache", "Invalid Key to create channel: $key", e)
+      null
+    }
+  }
+
+
   @Synchronized
   fun getOrCreateChannel(key: String): Channel {
     return channels[key] ?: run {
-      val answer = Channel(key.toByteArray())
+      val answer = Channel(key)
       channels.put(key, answer)
       answer
     }
@@ -71,18 +114,19 @@ object LocalCache {
   fun consume(event: MetadataEvent) {
     // new event
     val oldUser = getOrCreateUser(event.pubKey.toHexKey())
-    if (event.createdAt > oldUser.updatedMetadataAt) {
+    if (oldUser.info == null || event.createdAt > oldUser.info!!.updatedMetadataAt) {
       val newUser = try {
-        metadataParser.readValue<UserMetadata>(ByteArrayInputStream(event.content.toByteArray(Charsets.UTF_8)), UserMetadata::class.java)
+        metadataParser.readValue(
+          ByteArrayInputStream(event.content.toByteArray(Charsets.UTF_8)),
+          UserMetadata::class.java
+        )
       } catch (e: Exception) {
         e.printStackTrace()
         Log.w("MT", "Content Parse Error ${e.localizedMessage} ${event.content}")
         return
       }
 
-      oldUser.updateUserInfo(newUser, event.createdAt)
-      oldUser.latestMetadata = event
-
+      oldUser.updateUserInfo(newUser, event)
       //Log.d("MT", "New User Metadata ${oldUser.pubkeyDisplayHex} ${oldUser.toBestDisplayName()}")
     } else {
       //Log.d("MT","Relay sent a previous Metadata Event ${oldUser.toBestDisplayName()} ${formattedDateTime(event.createdAt)} > ${formattedDateTime(oldUser.updatedAt)}")
@@ -94,21 +138,28 @@ object LocalCache {
       .format(DateTimeFormatter.ofPattern("uuuu MMM d hh:mm a"))
   }
 
-  fun consume(event: TextNoteEvent, relay: Relay? = null) {
-    val note = getOrCreateNote(event.id.toHex())
 
+  fun consume(event: TextNoteEvent, relay: Relay? = null) {
+    if (antiSpam.isSpam(event)) {
+      relay?.let {
+        it.spamCounter++
+      }
+      return
+    }
+
+    val note = getOrCreateNote(event.id.toHex())
     val author = getOrCreateUser(event.pubKey.toHexKey())
 
     if (relay != null) {
-      author.addRelay(relay, event.createdAt)
+      author.addRelayBeingUsed(relay, event.createdAt)
       note.addRelay(relay)
     }
 
     // Already processed this event.
     if (note.event != null) return
 
-    val mentions = event.mentions.map { getOrCreateUser(it) }
-    val replyTo = event.replyTos.map { getOrCreateNote(it) }
+    val mentions = event.mentions.mapNotNull { checkGetOrCreateUser(it) }
+    val replyTo = replyToWithoutCitations(event).mapNotNull { checkGetOrCreateNote(it) }
 
     note.loadEvent(event, author, mentions, replyTo)
 
@@ -133,6 +184,24 @@ object LocalCache {
     refreshObservers()
   }
 
+  private fun replyToWithoutCitations(event: TextNoteEvent): List<String> {
+    var citations = mutableSetOf<String>()
+    // Removes citations from replies:
+    val matcher = tagSearch.matcher(event.content)
+    while (matcher.find()) {
+      try {
+        val tag = matcher.group(1)?.let { event.tags[it.toInt()] }
+        if (tag != null && tag[0] == "e") {
+          citations.add(tag[1])
+        }
+      } catch (e: Exception) {
+
+      }
+    }
+
+    return event.replyTos.filter { it !in citations }
+  }
+
   fun consume(event: RecommendRelayEvent) {
     //Log.d("RR", event.toJson())
   }
@@ -140,8 +209,10 @@ object LocalCache {
   fun consume(event: ContactListEvent) {
     val user = getOrCreateUser(event.pubKey.toHexKey())
 
-    if (event.createdAt > user.updatedFollowsAt) {
-      //Log.d("CL", "AAA ${user.toBestDisplayName()} ${event.follows.size}")
+    if (event.createdAt > user.updatedFollowsAt && event.follows.isNotEmpty()) {
+      // Saves relay list only if it's a user that is currently been seen
+      user.latestContactList = event
+
       user.updateFollows(
         event.follows.map {
           try {
@@ -157,6 +228,7 @@ object LocalCache {
         event.createdAt
       )
 
+      // Saves relay list only if it's a user that is currently been seen
       try {
         if (event.content.isNotEmpty()) {
           val relays: Map<String, ContactListEvent.ReadWrite> =
@@ -168,10 +240,14 @@ object LocalCache {
           user.updateRelays(relays)
         }
       } catch (e: Exception) {
+        println("relay import issue")
         e.printStackTrace()
       }
 
-      user.latestContactList = event
+      Log.d(
+        "CL",
+        "AAA ${user.toBestDisplayName()} ${event.follows.size}"
+      )
     }
   }
 
@@ -180,7 +256,7 @@ object LocalCache {
     val author = getOrCreateUser(event.pubKey.toHexKey())
 
     if (relay != null) {
-      author.addRelay(relay, event.createdAt)
+      author.addRelayBeingUsed(relay, event.createdAt)
       note.addRelay(relay)
     }
 
@@ -191,8 +267,8 @@ object LocalCache {
 
     //Log.d("PM", "${author.toBestDisplayName()} to ${recipient?.toBestDisplayName()}")
 
-    val repliesTo = event.tags.filter { it.firstOrNull() == "e" }.mapNotNull { it.getOrNull(1) }.map { getOrCreateNote(it) }
-    val mentions = event.tags.filter { it.firstOrNull() == "p" }.mapNotNull { it.getOrNull(1) }.map { getOrCreateUser(it) }
+    val repliesTo = event.tags.filter { it.firstOrNull() == "e" }.mapNotNull { it.getOrNull(1) }.mapNotNull { checkGetOrCreateNote(it) }
+    val mentions = event.tags.filter { it.firstOrNull() == "p" }.mapNotNull { it.getOrNull(1) }.mapNotNull { checkGetOrCreateUser(it) }
 
     note.loadEvent(event, author, mentions, repliesTo)
 
@@ -205,7 +281,41 @@ object LocalCache {
   }
 
   fun consume(event: DeletionEvent) {
-    //Log.d("DEL", event.toJson())
+    var deletedAtLeastOne = false
+
+    event.deleteEvents.mapNotNull { notes[it] }.forEach { deleteNote ->
+      // must be the same author
+      if (deleteNote.author?.pubkeyHex == event.pubKey.toHexKey()) {
+        deleteNote.author?.removeNote(deleteNote)
+
+        // reverts the add
+        deleteNote.mentions?.forEach { user ->
+          user.removeTaggedPost(deleteNote)
+          user.removeReport(deleteNote)
+        }
+
+        deleteNote.replyTo?.forEach { replyingNote ->
+          replyingNote.author?.removeTaggedPost(deleteNote)
+        }
+
+        // Counts the replies
+        deleteNote.replyTo?.forEach { masterNote ->
+          masterNote.removeReply(deleteNote)
+          masterNote.removeBoost(deleteNote)
+          masterNote.removeReaction(deleteNote)
+          masterNote.removeZap(deleteNote)
+          masterNote.removeReport(deleteNote)
+        }
+
+        notes.remove(deleteNote.idHex)
+
+        deletedAtLeastOne = true
+      }
+    }
+
+    if (deletedAtLeastOne) {
+      live.invalidateData()
+    }
   }
 
   fun consume(event: RepostEvent) {
@@ -217,8 +327,8 @@ object LocalCache {
     //Log.d("TN", "New Boost (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${formattedDateTime(event.createdAt)}")
 
     val author = getOrCreateUser(event.pubKey.toHexKey())
-    val mentions = event.originalAuthor.map { getOrCreateUser(it) }
-    val repliesTo = event.boostedPost.map { getOrCreateNote(it) }
+    val mentions = event.originalAuthor.mapNotNull { checkGetOrCreateUser(it) }
+    val repliesTo = event.boostedPost.mapNotNull { checkGetOrCreateNote(it) }
 
     note.loadEvent(event, author, mentions, repliesTo)
 
@@ -248,8 +358,8 @@ object LocalCache {
     if (note.event != null) return
 
     val author = getOrCreateUser(event.pubKey.toHexKey())
-    val mentions = event.originalAuthor.map { getOrCreateUser(it) }
-    val repliesTo = event.originalPost.map { getOrCreateNote(it) }
+    val mentions = event.originalAuthor.mapNotNull { checkGetOrCreateUser(it) }
+    val repliesTo = event.originalPost.mapNotNull { checkGetOrCreateNote(it) }
 
     note.loadEvent(event, author, mentions, repliesTo)
 
@@ -286,15 +396,20 @@ object LocalCache {
     }
   }
 
-  fun consume(event: ReportEvent) {
+  fun consume(event: ReportEvent, relay: Relay?) {
     val note = getOrCreateNote(event.id.toHex())
+    val author = getOrCreateUser(event.pubKey.toHexKey())
+
+    if (relay != null) {
+      author.addRelayBeingUsed(relay, event.createdAt)
+      note.addRelay(relay)
+    }
 
     // Already processed this event.
     if (note.event != null) return
 
-    val author = getOrCreateUser(event.pubKey.toHexKey())
-    val mentions = event.reportedAuthor.map { getOrCreateUser(it) }
-    val repliesTo = event.reportedPost.map { getOrCreateNote(it) }
+    val mentions = event.reportedAuthor.mapNotNull { checkGetOrCreateUser(it) }
+    val repliesTo = event.reportedPost.mapNotNull { checkGetOrCreateNote(it) }
 
     note.loadEvent(event, author, mentions, repliesTo)
 
@@ -335,7 +450,7 @@ object LocalCache {
     if (event.channel.isNullOrBlank()) return
 
     // new event
-    val oldChannel = getOrCreateChannel(event.channel)
+    val oldChannel = checkGetOrCreateChannel(event.channel) ?: return
     val author = getOrCreateUser(event.pubKey.toHexKey())
     if (event.createdAt > oldChannel.updatedMetadataAt) {
       if (oldChannel.creator == null || oldChannel.creator == author) {
@@ -355,8 +470,14 @@ object LocalCache {
 
   fun consume(event: ChannelMessageEvent, relay: Relay?) {
     if (event.channel.isNullOrBlank()) return
+    if (antiSpam.isSpam(event)) {
+      relay?.let {
+        it.spamCounter++
+      }
+      return
+    }
 
-    val channel = getOrCreateChannel(event.channel)
+    val channel = checkGetOrCreateChannel(event.channel) ?: return
 
     val note = getOrCreateNote(event.id.toHex())
     channel.addNote(note)
@@ -364,16 +485,16 @@ object LocalCache {
     val author = getOrCreateUser(event.pubKey.toHexKey())
 
     if (relay != null) {
-      author.addRelay(relay, event.createdAt)
+      author.addRelayBeingUsed(relay, event.createdAt)
       note.addRelay(relay)
     }
 
     // Already processed this event.
     if (note.event != null) return
 
-    val mentions = event.mentions.map { getOrCreateUser(it) }
+    val mentions = event.mentions.mapNotNull { checkGetOrCreateUser(it) }
     val replyTo = event.replyTos
-      .map { getOrCreateNote(it) }
+      .mapNotNull { checkGetOrCreateNote(it) }
       .filter { it.event !is ChannelCreateEvent }
 
     note.channel = channel
@@ -405,11 +526,77 @@ object LocalCache {
 
   }
 
+  fun consume(event: LnZapEvent) {
+    val note = getOrCreateNote(event.id.toHexKey())
+
+    // Already processed this event.
+    if (note.event != null) return
+
+    val author = getOrCreateUser(event.pubKey.toHexKey())
+    val mentions = event.zappedAuthor.mapNotNull { checkGetOrCreateUser(it) }
+    val repliesTo = event.zappedPost.mapNotNull { checkGetOrCreateNote(it) }
+
+    note.loadEvent(event, author, mentions, repliesTo)
+
+    val zapRequest = event.containedPost?.id?.toHexKey()?.let { getOrCreateNote(it) }
+    if (zapRequest == null) {
+      Log.e("ZP","Zap Request not found. Unable to process Zap {${event.toJson()}}")
+      return
+    }
+
+    //Log.d("ZP", "New ZapEvent ${event.content} (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${formattedDateTime(event.createdAt)}")
+
+    // Adds notifications to users.
+    mentions.forEach {
+      it.addTaggedPost(note)
+    }
+    repliesTo.forEach {
+      it.author?.addTaggedPost(note)
+    }
+
+    repliesTo.forEach {
+      it.addZap(zapRequest, note)
+    }
+    mentions.forEach {
+      it.addZap(zapRequest, note)
+    }
+  }
+
+  fun consume(event: LnZapRequestEvent) {
+    val note = getOrCreateNote(event.id.toHexKey())
+
+    // Already processed this event.
+    if (note.event != null) return
+
+    val author = getOrCreateUser(event.pubKey.toHexKey())
+    val mentions = event.zappedAuthor.mapNotNull { checkGetOrCreateUser(it) }
+    val repliesTo = event.zappedPost.mapNotNull { checkGetOrCreateNote(it) }
+
+    note.loadEvent(event, author, mentions, repliesTo)
+
+    //Log.d("ZP", "New Zap Request ${event.content} (${notes.size},${users.size}) ${note.author?.toBestDisplayName()} ${formattedDateTime(event.createdAt)}")
+
+    // Adds notifications to users.
+    mentions.forEach {
+      it.addTaggedPost(note)
+    }
+    repliesTo.forEach {
+      it.author?.addTaggedPost(note)
+    }
+
+    repliesTo.forEach {
+      it.addZap(note, null)
+    }
+    mentions.forEach {
+      it.addZap(note, null)
+    }
+  }
+
   fun findUsersStartingWith(username: String): List<User> {
     return users.values.filter {
-           it.info.anyNameStartsWith(username)
+          (it.anyNameStartsWith(username))
         || it.pubkeyHex.startsWith(username, true)
-        || it.pubkey.toNpub().startsWith(username, true)
+        || it.pubkeyNpub().startsWith(username, true)
     }
   }
 
@@ -418,28 +605,156 @@ object LocalCache {
       (it.event is TextNoteEvent && it.event?.content?.contains(text, true) ?: false)
         || (it.event is ChannelMessageEvent && it.event?.content?.contains(text, true) ?: false)
         || it.idHex.startsWith(text, true)
-        || it.id.toNote().startsWith(text, true)
+        || it.idNote().startsWith(text, true)
     }
   }
 
   fun findChannelsStartingWith(text: String): List<Channel> {
     return channels.values.filter {
-      it.anyNameStartsWith(text)
+        it.anyNameStartsWith(text)
         || it.idHex.startsWith(text, true)
-        || it.id.toNote().startsWith(text, true)
+        || it.idNote().startsWith(text, true)
     }
   }
 
+  fun cleanObservers() {
+    notes.forEach {
+      it.value.clearLive()
+    }
+
+    users.forEach {
+      it.value.clearLive()
+    }
+  }
+
+  fun pruneOldAndHiddenMessages(account: Account) {
+    channels.forEach {
+      val toBeRemoved = it.value.pruneOldAndHiddenMessages(account)
+
+      toBeRemoved.forEach {
+        notes.remove(it.idHex)
+        // Doesn't need to clean up the replies and mentions.. Too small to matter.
+
+        // reverts the add
+        it.mentions?.forEach { user ->
+          user.removeTaggedPost(it)
+        }
+        it.replyTo?.forEach { replyingNote ->
+          replyingNote.author?.removeTaggedPost(it)
+        }
+
+        // Counts the replies
+        it.replyTo?.forEach { replyingNote ->
+          it.removeReply(it)
+        }
+      }
+
+      println("PRUNE: ${toBeRemoved.size} messages removed from ${it.value.info.name}")
+    }
+  }
+
+  fun pruneNonFollows(account: Account) {
+    val follows = account.userProfile().follows
+    val knownPMs = account.userProfile().privateChatrooms.filter {
+      account.userProfile().hasSentMessagesTo(it.key) && account.isAcceptable(it.key)
+    }
+
+    val followsFollow = follows.map {
+      it.follows
+    }.flatten()
+
+    val followSet = follows.plus(knownPMs).plus(account.userProfile()).plus(followsFollow)
+
+    val toBeRemoved = notes
+      .filter {
+        (it.value.author == null || it.value.author!! !in followSet) && it.value.event?.kind == TextNoteEvent.kind && it.value.liveSet?.isInUse() != true
+      }
+
+    toBeRemoved.forEach {
+      notes.remove(it.key)
+    }
+
+    val toBeRemovedUsers = users
+      .filter {
+        (it.value !in followSet) && it.value.liveSet?.isInUse() != true
+      }
+
+    toBeRemovedUsers.forEach {
+      users.remove(it.key)
+    }
+
+    println("PRUNE: ${toBeRemoved.size} messages removed because they came from NonFollows")
+    println("PRUNE: ${toBeRemovedUsers.size} users removed because are NonFollows")
+  }
+
+  fun pruneHiddenMessages(account: Account) {
+    val toBeRemoved = account.hiddenUsers.map {
+      users[it]?.notes ?: emptySet()
+    }.flatten()
+
+    account.hiddenUsers.forEach {
+      users[it]?.clearNotes()
+    }
+
+    toBeRemoved.forEach {
+      it.author?.removeNote(it)
+
+      // reverts the add
+      it.mentions?.forEach { user ->
+        user.removeTaggedPost(it)
+      }
+      it.replyTo?.forEach { replyingNote ->
+        replyingNote.author?.removeTaggedPost(it)
+      }
+
+      // Counts the replies
+      it.replyTo?.forEach { masterNote ->
+        masterNote.removeReply(it)
+        masterNote.removeBoost(it)
+        masterNote.removeReaction(it)
+        masterNote.removeZap(it)
+        masterNote.removeReport(it)
+      }
+
+      notes.remove(it.idHex)
+    }
+
+    println("PRUNE: ${toBeRemoved.size} messages removed because they were Hidden")
+  }
+
   // Observers line up here.
   val live: LocalCacheLiveData = LocalCacheLiveData(this)
 
   private fun refreshObservers() {
-    live.refresh()
+    live.invalidateData()
   }
 }
 
 class LocalCacheLiveData(val cache: LocalCache): LiveData<LocalCacheState>(LocalCacheState(cache)) {
-  fun refresh() {
+
+  // Refreshes observers in batches.
+  var handlerWaiting = AtomicBoolean()
+
+  @Synchronized
+  fun invalidateData() {
+    if (!hasActiveObservers()) return
+    if (handlerWaiting.getAndSet(true)) return
+
+    handlerWaiting.set(true)
+    val scope = CoroutineScope(Job() + Dispatchers.Main)
+    scope.launch {
+      try {
+        delay(100)
+        refresh()
+      } finally {
+        withContext(NonCancellable) {
+          handlerWaiting.set(false)
+        }
+      }
+    }
+  }
+
+  private fun refresh() {
     postValue(LocalCacheState(cache))
   }
 }

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

@@ -2,34 +2,29 @@ package com.vitorpamplona.amethyst.model
 
 import androidx.lifecycle.LiveData
 import com.vitorpamplona.amethyst.service.NostrSingleEventDataSource
+import com.vitorpamplona.amethyst.service.model.LnZapEvent
 import com.vitorpamplona.amethyst.service.model.ReactionEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
+import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 import fr.acinq.secp256k1.Hex
+import java.math.BigDecimal
 import java.time.Instant
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
-import java.util.Collections
+import java.util.Date
+import java.util.concurrent.atomic.AtomicBoolean
+import java.util.regex.Pattern
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
-import com.vitorpamplona.amethyst.service.relays.Relay
-import java.util.Date
-import java.util.concurrent.atomic.AtomicBoolean
-import java.util.regex.Matcher
-import java.util.regex.Pattern
 import nostr.postr.events.Event
 
 val tagSearch = Pattern.compile("(?:\\s|\\A)\\#\\[([0-9]+)\\]")
 
 class Note(val idHex: String) {
-    // These fields are always available.
-    // They are immutable
-    val id = Hex.decode(idHex)
-    val idDisplayNote = id.toNote().toShortenHex()
-
     // These fields are only available after the Text Note event is received.
     // They are immutable after that.
     var event: Event? = null
@@ -44,7 +39,9 @@ class Note(val idHex: String) {
         private set
     var boosts = setOf<Note>()
         private set
-    var reports = setOf<Note>()
+    var reports = mapOf<User, Set<Note>>()
+        private set
+    var zaps = mapOf<Note, Note?>()
         private set
 
     var relays = setOf<String>()
@@ -54,13 +51,17 @@ class Note(val idHex: String) {
 
     var lastReactionsDownloadTime: Long? = null
 
+    fun id() = Hex.decode(idHex)
+    fun idNote() = id().toNote()
+    fun idDisplayNote() = idNote().toShortenHex()
+
     fun loadEvent(event: Event, author: User, mentions: List<User>, replyTo: List<Note>) {
         this.event = event
         this.author = author
         this.mentions = mentions
         this.replyTo = replyTo
 
-        live.invalidateData()
+        liveSet?.metadata?.invalidateData()
     }
 
     fun formattedDateTime(timestamp: Long): String {
@@ -68,63 +69,124 @@ class Note(val idHex: String) {
             .format(DateTimeFormatter.ofPattern("uuuu-MM-dd-HH:mm:ss"))
     }
 
-    fun replyLevelSignature(): String {
+    /**
+     * This method caches signatures during each execution to avoid recalculation in longer threads
+     */
+    fun replyLevelSignature(cachedSignatures: MutableMap<Note, String> = mutableMapOf()): String {
         val replyTo = replyTo
         if (replyTo == null || replyTo.isEmpty()) {
             return "/" + formattedDateTime(event?.createdAt ?: 0) + ";"
         }
 
         return replyTo
-            .map { it.replyLevelSignature() }
+            .map {
+                cachedSignatures[it] ?: it.replyLevelSignature(cachedSignatures).apply { cachedSignatures.put(it, this) }
+            }
             .maxBy { it.length }.removeSuffix(";") + "/" + formattedDateTime(event?.createdAt ?: 0) + ";"
     }
 
-    fun replyLevel(): Int {
+    fun replyLevel(cachedLevels: MutableMap<Note, Int> = mutableMapOf()): Int {
         val replyTo = replyTo
         if (replyTo == null || replyTo.isEmpty()) {
             return 0
         }
 
         return replyTo.maxOf {
-            it.replyLevel()
+            cachedLevels[it] ?: it.replyLevel(cachedLevels).apply { cachedLevels.put(it, this) }
         } + 1
     }
 
     fun addReply(note: Note) {
         if (note !in replies) {
             replies = replies + note
-            liveReplies.invalidateData()
+            liveSet?.replies?.invalidateData()
         }
     }
 
+    fun removeReply(note: Note) {
+        replies = replies - note
+        liveSet?.replies?.invalidateData()
+    }
+    fun removeBoost(note: Note) {
+        boosts = boosts - note
+        liveSet?.boosts?.invalidateData()
+    }
+    fun removeReaction(note: Note) {
+        reactions = reactions - note
+        liveSet?.reactions?.invalidateData()
+    }
+
+    fun removeReport(deleteNote: Note) {
+        val author = deleteNote.author ?: return
+
+        if (author in reports.keys && reports[author]?.contains(deleteNote) == true ) {
+            reports[author]?.let {
+                reports = reports + Pair(author, it.minus(deleteNote))
+                liveSet?.reports?.invalidateData()
+            }
+        }
+    }
+
+    fun removeZap(note: Note) {
+        if (zaps[note] != null) {
+            zaps = zaps.minus(note)
+            liveSet?.zaps?.invalidateData()
+        } else if (zaps.containsValue(note)) {
+            val toRemove = zaps.filterValues { it == note }
+            zaps = zaps.minus(toRemove.keys)
+            liveSet?.zaps?.invalidateData()
+        }
+    }
+
+
     fun addBoost(note: Note) {
         if (note !in boosts) {
             boosts = boosts + note
-            liveBoosts.invalidateData()
+            liveSet?.boosts?.invalidateData()
+        }
+    }
+
+    fun addZap(zapRequest: Note, zap: Note?) {
+        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()
         }
     }
 
     fun addReaction(note: Note) {
         if (note !in reactions) {
             reactions = reactions + note
-            liveReactions.invalidateData()
+            liveSet?.reactions?.invalidateData()
         }
     }
 
     fun addReport(note: Note) {
-        if (note !in reports) {
-            reports = reports + note
-            liveReports.invalidateData()
+        val author = note.author ?: return
+
+        if (author !in reports.keys) {
+            reports = reports + Pair(author, setOf(note))
+            liveSet?.reports?.invalidateData()
+        } else if (reports[author]?.contains(note) == false) {
+            reports = reports + Pair(author, (reports[author] ?: emptySet()) + note)
+            liveSet?.reports?.invalidateData()
         }
     }
 
     fun addRelay(relay: Relay) {
         if (relay.url !in relays) {
             relays = relays + relay.url
-            liveRelays.invalidateData()
+            liveSet?.relays?.invalidateData()
         }
     }
 
+    fun isZappedBy(user: User): Boolean {
+        // Zaps who the requester was the user
+        return zaps.any { it.key.author == user }
+    }
+
     fun isReactedBy(user: User): Boolean {
         return reactions.any { it.author == user }
     }
@@ -133,18 +195,34 @@ class Note(val idHex: String) {
         return boosts.any { it.author == user }
     }
 
-    fun reportsBy(user: User): List<Note> {
-        return reports.filter { it.author == user }
+    fun reportsBy(user: User): Set<Note> {
+        return reports[user] ?: emptySet()
+    }
+
+    fun reportAuthorsBy(users: Set<User>): List<User> {
+        return reports.keys.filter { it in users }
     }
 
     fun reportsBy(users: Set<User>): List<Note> {
-        return reports.filter { it.author in users }
+        return reportAuthorsBy(users).mapNotNull {
+            reports[it]
+        }.flatten()
+    }
+
+    fun zappedAmount(): BigDecimal {
+        return zaps.mapNotNull { it.value?.event }
+            .filterIsInstance<LnZapEvent>()
+            .mapNotNull {
+                it.amount
+            }.sumOf { it }
     }
 
     fun hasAnyReports(): Boolean {
         val dayAgo = Date().time / 1000 - 24*60*60
-        return author?.reports?.filter { it.event?.createdAt ?: 0 > dayAgo }?.isNotEmpty() ?: false
-            || reports.isNotEmpty()
+        return reports.isNotEmpty() ||
+          (author?.reports?.values?.filter {
+              it.firstOrNull { ( it.event?.createdAt ?: 0 ) > dayAgo } != null
+          }?.isNotEmpty() ?: false)
     }
 
     fun directlyCiteUsers(): Set<User> {
@@ -154,7 +232,9 @@ class Note(val idHex: String) {
             try {
                 val tag = matcher.group(1)?.let { event?.tags?.get(it.toInt()) }
                 if (tag != null && tag[0] == "p") {
-                    returningList.add(LocalCache.getOrCreateUser(tag[1]))
+                    LocalCache.checkGetOrCreateUser(tag[1])?.let {
+                        returningList.add(it)
+                    }
                 }
             } catch (e: Exception) {
 
@@ -174,23 +254,64 @@ class Note(val idHex: String) {
         return event is RepostEvent || replyTo == null || replyTo?.size == 0
     }
 
-    fun hasReacted(loggedIn: User, content: String): Boolean {
-        return reactions.firstOrNull { it.author == loggedIn && it.event?.content == content } != null
+    fun hasZapped(loggedIn: User): Boolean {
+        return zaps.any { it.key.author == loggedIn }
     }
 
-    fun hasBoosted(loggedIn: User): Boolean {
+    fun hasReacted(loggedIn: User, content: String): Boolean {
+        return reactedBy(loggedIn, content).isNotEmpty()
+    }
+
+    fun reactedBy(loggedIn: User, content: String): List<Note> {
+        return reactions.filter { it.author == loggedIn && it.event?.content == content }
+    }
+
+    fun hasBoostedInTheLast5Minutes(loggedIn: User): Boolean {
         val currentTime = Date().time / 1000
         return boosts.firstOrNull { it.author == loggedIn && (it.event?.createdAt ?: 0) > currentTime - (60 * 5)} != null // 5 minute protection
     }
 
-    // Observers line up here.
-    val live: NoteLiveData = NoteLiveData(this)
+    fun boostedBy(loggedIn: User): List<Note> {
+        return boosts.filter { it.author == loggedIn }
+    }
 
-    val liveReactions: NoteLiveData = NoteLiveData(this)
-    val liveBoosts: NoteLiveData = NoteLiveData(this)
-    val liveReplies: NoteLiveData = NoteLiveData(this)
-    val liveReports: NoteLiveData = NoteLiveData(this)
-    val liveRelays: NoteLiveData = NoteLiveData(this)
+    var liveSet: NoteLiveSet? = null
+
+    fun live(): NoteLiveSet {
+        if (liveSet == null) {
+            liveSet = NoteLiveSet(this)
+        }
+        return liveSet!!
+    }
+
+    fun clearLive() {
+        if (liveSet != null && liveSet?.isInUse() == false) {
+            liveSet = null
+        }
+    }
+}
+
+
+class NoteLiveSet(u: Note) {
+    // Observers line up here.
+    val metadata: NoteLiveData = NoteLiveData(u)
+
+    val reactions: NoteLiveData = NoteLiveData(u)
+    val boosts: NoteLiveData = NoteLiveData(u)
+    val replies: NoteLiveData = NoteLiveData(u)
+    val reports: NoteLiveData = NoteLiveData(u)
+    val relays: NoteLiveData = NoteLiveData(u)
+    val zaps: NoteLiveData = NoteLiveData(u)
+
+    fun isInUse(): Boolean {
+        return metadata.hasObservers()
+          || reactions.hasObservers()
+          || boosts.hasObservers()
+          || replies.hasObservers()
+          || reports.hasObservers()
+          || relays.hasObservers()
+          || zaps.hasObservers()
+    }
 }
 
 class NoteLiveData(val note: Note): LiveData<NoteState>(NoteState(note)) {

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

@@ -9,5 +9,6 @@ data class RelaySetupInfo(
     val errorCount: Int = 0,
     val downloadCount: Int = 0,
     val uploadCount: Int = 0,
+    val spamCount: Int = 0,
     val feedTypes: Set<FeedType>
 )

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

@@ -0,0 +1,66 @@
+package com.vitorpamplona.amethyst.model
+
+import kotlin.time.ExperimentalTime
+import kotlin.time.measureTimedValue
+
+class ThreadAssembler {
+
+  fun searchRoot(note: Note, testedNotes: MutableSet<Note> = mutableSetOf()): Note? {
+    if (note.replyTo == null || note.replyTo?.isEmpty() == true) return note
+
+    testedNotes.add(note)
+
+    val markedAsRoot = note.event?.tags?.firstOrNull { it[0] == "e" && it.size > 3 && it[3] == "root" }?.getOrNull(1)
+    if (markedAsRoot != null) return LocalCache.checkGetOrCreateNote(markedAsRoot)
+
+    val hasNoReplyTo = note.replyTo?.firstOrNull { it.replyTo?.isEmpty() == true }
+    if (hasNoReplyTo != null) return hasNoReplyTo
+
+    // recursive
+    val roots = note.replyTo?.map {
+      if (it !in testedNotes)
+        searchRoot(it, testedNotes)
+      else
+        null
+    }?.filterNotNull()
+
+    if (roots != null && roots.isNotEmpty()) {
+      return roots[0]
+    }
+
+    return null
+  }
+
+  @OptIn(ExperimentalTime::class)
+  fun findThreadFor(noteId: String): Set<Note> {
+    val (result, elapsed) = measureTimedValue {
+      val note = LocalCache.getOrCreateNote(noteId)
+
+      if (note.event != null) {
+        val thread = mutableSetOf<Note>()
+
+        val threadRoot = searchRoot(note, thread) ?: note
+
+        loadDown(threadRoot, thread)
+
+        thread.toSet()
+      } else {
+        setOf(note)
+      }
+    }
+
+    println("Model Refresh: Thread loaded in ${elapsed}")
+
+    return result
+  }
+
+  fun loadDown(note: Note, thread: MutableSet<Note>) {
+    if (note !in thread) {
+      thread.add(note)
+
+      note.replies.forEach {
+        loadDown(it, thread)
+      }
+    }
+  }
+}

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

@@ -7,7 +7,6 @@ import com.vitorpamplona.amethyst.ui.components.imageExtension
 import com.vitorpamplona.amethyst.ui.components.isValidURL
 import com.vitorpamplona.amethyst.ui.components.noProtocolUrlValidator
 import com.vitorpamplona.amethyst.ui.components.videoExtension
-import java.util.concurrent.ConcurrentHashMap
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job

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

@@ -2,38 +2,33 @@ package com.vitorpamplona.amethyst.model
 
 import androidx.lifecycle.LiveData
 import com.vitorpamplona.amethyst.service.NostrSingleUserDataSource
+import com.vitorpamplona.amethyst.service.model.LnZapEvent
 import com.vitorpamplona.amethyst.service.model.ReportEvent
-import com.vitorpamplona.amethyst.service.relays.Client
-import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 import fr.acinq.secp256k1.Hex
-import java.util.Collections
-import java.util.concurrent.ConcurrentHashMap
+import java.math.BigDecimal
 import java.util.concurrent.atomic.AtomicBoolean
-import kotlin.time.ExperimentalTime
-import kotlin.time.measureTimedValue
+import java.util.regex.Pattern
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.NonCancellable
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import nostr.postr.Bech32
 import nostr.postr.events.ContactListEvent
-import nostr.postr.events.Event
 import nostr.postr.events.MetadataEvent
 import nostr.postr.toNpub
 
+val lnurlpPattern = Pattern.compile("(?i:http|https):\\/\\/((.+)\\/)*\\.well-known\\/lnurlp\\/(.*)")
+
 class User(val pubkeyHex: String) {
-    val pubkey = Hex.decode(pubkeyHex)
-    val pubkeyDisplayHex = pubkey.toNpub().toShortenHex()
+    var info: UserMetadata? = null
 
-    var info = UserMetadata()
-
-    var updatedMetadataAt: Long = 0;
     var updatedFollowsAt: Long = 0;
-
     var latestContactList: ContactListEvent? = null
-    var latestMetadata: MetadataEvent? = null
 
     var follows = setOf<User>()
         private set
@@ -45,7 +40,11 @@ class User(val pubkeyHex: String) {
     var taggedPosts = setOf<Note>()
         private set
 
-    var reports = setOf<Note>()
+    var reports = mapOf<User, Set<Note>>()
+        private set
+    var latestReportTime: Long = 0
+
+    var zaps = mapOf<Note, Note?>()
         private set
 
     var relays: Map<String, ContactListEvent.ReadWrite>? = null
@@ -54,144 +53,177 @@ class User(val pubkeyHex: String) {
     var relaysBeingUsed = mapOf<String, RelayInfo>()
         private set
 
-    var messages = mapOf<User, Set<Note>>()
+    var privateChatrooms = mapOf<User, Chatroom>()
         private set
 
-    var latestMetadataRequestEOSE: Long? = null
-    var latestReportRequestEOSE: Long? = null
+    fun pubkey() = Hex.decode(pubkeyHex)
+    fun pubkeyNpub() = pubkey().toNpub()
+    fun pubkeyDisplayHex() = pubkeyNpub().toShortenHex()
 
     fun toBestDisplayName(): String {
-        return bestDisplayName() ?: bestUsername() ?: pubkeyDisplayHex
+        return bestDisplayName() ?: bestUsername() ?: pubkeyDisplayHex()
     }
 
     fun bestUsername(): String? {
-        return info.name?.ifBlank { null } ?: info.username?.ifBlank { null }
+        return info?.name?.ifBlank { null } ?: info?.username?.ifBlank { null }
     }
 
     fun bestDisplayName(): String? {
-        return info.displayName?.ifBlank { null } ?: info.display_name?.ifBlank { null }
+        return info?.displayName?.ifBlank { null } ?: info?.display_name?.ifBlank { null }
     }
 
-    fun profilePicture(): String {
-        if (info.picture.isNullOrBlank()) info.picture = null
-        return info.picture ?: "https://robohash.org/${pubkeyHex}.png"
+    fun nip05(): String? {
+        return info?.nip05?.ifBlank { null }
+    }
+
+    fun profilePicture(): String? {
+        if (info?.picture.isNullOrBlank()) info?.picture = null
+        return info?.picture
     }
 
     fun follow(user: User, followedAt: Long) {
         follows = follows + user
         user.followers = user.followers + this
 
-        liveFollows.invalidateData()
-        user.liveFollows.invalidateData()
-
-        updateSubscribers {
-            it.onFollowsChange()
-        }
-
-        user.updateSubscribers {
-            it.onFollowsChange()
-        }
+        liveSet?.follows?.invalidateData()
+        user.liveSet?.follows?.invalidateData()
     }
+
     fun unfollow(user: User) {
         follows = follows - user
         user.followers = user.followers - this
 
-        liveFollows.invalidateData()
-        user.liveFollows.invalidateData()
-
-        updateSubscribers {
-            it.onFollowsChange()
-        }
-
-        user.updateSubscribers {
-            it.onFollowsChange()
-        }
+        liveSet?.follows?.invalidateData()
+        user.liveSet?.follows?.invalidateData()
     }
 
     fun follow(users: Set<User>, followedAt: Long) {
         follows = follows + users
         users.forEach {
-            it.followers = it.followers + this
-            it.liveFollows.invalidateData()
-            it.updateSubscribers {
-                it.onFollowsChange()
+            if (this !in it.followers && it.liveSet?.isInUse() == true) {
+                it.followers = it.followers + this
+                it.liveSet?.follows?.invalidateData()
             }
         }
 
-        liveFollows.invalidateData()
-        updateSubscribers {
-            it.onFollowsChange()
-        }
+        liveSet?.follows?.invalidateData()
     }
+
     fun unfollow(users: Set<User>) {
         follows = follows - users
         users.forEach {
-            it.followers = it.followers - this
-            it.liveFollows.invalidateData()
-            it.updateSubscribers {
-                it.onFollowsChange()
+            if (this in it.followers && it.liveSet?.isInUse() == true) {
+                it.followers = it.followers - this
+                it.liveSet?.follows?.invalidateData()
             }
         }
-        liveFollows.invalidateData()
-        updateSubscribers {
-            it.onFollowsChange()
-        }
+        liveSet?.follows?.invalidateData()
     }
 
     fun addTaggedPost(note: Note) {
         if (note !in taggedPosts) {
             taggedPosts = taggedPosts + note
-            updateSubscribers { it.onNewTaggedPosts() }
+            // No need for Listener yet
         }
     }
 
+    fun removeTaggedPost(note: Note) {
+        taggedPosts = taggedPosts - note
+    }
+
     fun addNote(note: Note) {
         if (note !in notes) {
             notes = notes + note
-            updateSubscribers { it.onNewNotes() }
+            // No need for Listener yet
         }
     }
 
+    fun removeNote(note: Note) {
+        notes = notes - note
+    }
+
+    fun clearNotes() {
+        notes = setOf<Note>()
+    }
+
     fun addReport(note: Note) {
-        if (note !in reports) {
-            reports = reports + note
-            liveReports.invalidateData()
+        val author = note.author ?: return
+
+        if (author !in reports.keys) {
+            reports = reports + Pair(author, setOf(note))
+            liveSet?.reports?.invalidateData()
+        } else if (reports[author]?.contains(note) == false) {
+            reports = reports + Pair(author, (reports[author] ?: emptySet()) + note)
+            liveSet?.reports?.invalidateData()
+        }
+
+        val reportTime = note.event?.createdAt ?: 0
+        if (reportTime > latestReportTime) {
+            latestReportTime = reportTime
         }
     }
 
-    fun reportsBy(user: User): List<Note> {
-        return reports.filter { it.author == user }
+    fun removeReport(deleteNote: Note) {
+        val author = deleteNote.author ?: return
+
+        if (author in reports.keys && reports[author]?.contains(deleteNote) == true ) {
+            reports[author]?.let {
+                reports = reports + Pair(author, it.minus(deleteNote))
+                liveSet?.reports?.invalidateData()
+            }
+        }
+    }
+
+    fun addZap(zapRequest: Note, zap: Note?) {
+        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()
+        }
+    }
+
+    fun zappedAmount(): BigDecimal {
+        return zaps.mapNotNull { it.value?.event }
+            .filterIsInstance<LnZapEvent>()
+            .mapNotNull {
+                it.amount
+            }.sumOf { it }
+    }
+
+    fun reportsBy(user: User): Set<Note> {
+        return reports[user] ?: emptySet()
+    }
+
+    fun reportAuthorsBy(users: Set<User>): List<User> {
+        return reports.keys.filter { it in users }
     }
 
     fun reportsBy(users: Set<User>): List<Note> {
-        return reports.filter { it.author in users }
+        return reportAuthorsBy(users).mapNotNull {
+            reports[it]
+        }.flatten()
     }
 
     @Synchronized
-    fun getOrCreateChannel(user: User): Set<Note> {
-        return messages[user] ?: run {
-            val channel = setOf<Note>()
-            messages = messages + Pair(user, channel)
-            channel
+    fun getOrCreatePrivateChatroom(user: User): Chatroom {
+        return privateChatrooms[user] ?: run {
+            val privateChatroom = Chatroom(setOf<Note>())
+            privateChatrooms = privateChatrooms + Pair(user, privateChatroom)
+            privateChatroom
         }
     }
 
     fun addMessage(user: User, msg: Note) {
-        val channel = getOrCreateChannel(user)
-        if (msg !in channel) {
-            messages = messages + Pair(user, channel + msg)
-            liveMessages.invalidateData()
-            updateSubscribers { it.onNewMessage() }
+        val privateChatroom = getOrCreatePrivateChatroom(user)
+        if (msg !in privateChatroom.roomMessages) {
+            privateChatroom.roomMessages = privateChatroom.roomMessages + msg
+            liveSet?.messages?.invalidateData()
         }
     }
 
-    data class RelayInfo (
-        val url: String,
-        var lastEvent: Long,
-        var counter: Long
-    )
-
-    fun addRelay(relay: Relay, eventTime: Long) {
+    fun addRelayBeingUsed(relay: Relay, eventTime: Long) {
         val here = relaysBeingUsed[relay.url]
         if (here == null) {
             relaysBeingUsed = relaysBeingUsed + Pair(relay.url, RelayInfo(relay.url, eventTime, 1))
@@ -202,8 +234,7 @@ class User(val pubkeyHex: String) {
             here.counter++
         }
 
-        updateSubscribers { it.onNewRelayInfo() }
-        liveRelayInfo.invalidateData()
+        liveSet?.relayInfo?.invalidateData()
     }
     
     fun updateFollows(newFollows: Set<User>, updateAt: Long) {
@@ -216,24 +247,34 @@ class User(val pubkeyHex: String) {
         updatedFollowsAt = updateAt
     }
 
-    data class RelayMetadata(val read: Boolean, val write: Boolean, val activeTypes: Set<FeedType>)
-
     fun updateRelays(relayUse: Map<String, ContactListEvent.ReadWrite>) {
-        if (relays != relayUse) {
-            relays = relayUse
-            listeners.forEach {
-                it.onRelayChange()
+        // no need to test if relays are different. The Account will check for us.
+        relays = relayUse
+        liveSet?.relays?.invalidateData()
+    }
+
+    fun updateUserInfo(newUserInfo: UserMetadata, latestMetadata: MetadataEvent) {
+        info = newUserInfo
+        info?.latestMetadata = latestMetadata
+        info?.updatedMetadataAt = latestMetadata.createdAt
+
+        if (newUserInfo.lud16.isNullOrBlank() && newUserInfo.lud06?.toLowerCase()?.startsWith("lnurl") == true) {
+            try {
+                val url = String(Bech32.decodeBytes(newUserInfo.lud06!!, false).second)
+
+                val matcher = lnurlpPattern.matcher(url)
+                while (matcher.find()) {
+                    val domain = matcher.group(2)
+                    val username = matcher.group(3)
+
+                    info?.lud16 = "$username@$domain"
+                }
+            } catch (t: Throwable) {
+                // Doesn't create errors.
             }
         }
 
-        liveRelays.invalidateData()
-    }
-
-    fun updateUserInfo(newUserInfo: UserMetadata, updateAt: Long) {
-        info = newUserInfo
-        updatedMetadataAt = updateAt
-
-        liveMetadata.invalidateData()
+        liveSet?.metadata?.invalidateData()
     }
 
     fun isFollowing(user: User): Boolean {
@@ -241,67 +282,66 @@ class User(val pubkeyHex: String) {
     }
 
     fun hasSentMessagesTo(user: User?): Boolean {
-        val messagesToUser = messages[user] ?: return false
+        val messagesToUser = privateChatrooms[user] ?: return false
 
-        return messagesToUser.firstOrNull { this == it.author } != null
+        return messagesToUser.roomMessages.any { this == it.author }
     }
 
     fun hasReport(loggedIn: User, type: ReportEvent.ReportType): Boolean {
-        return reports.firstOrNull {
-            it.author == loggedIn
-              && it.event is ReportEvent
-              && (it.event as ReportEvent).reportType.contains(type)
+        return reports[loggedIn]?.firstOrNull() {
+              it.event is ReportEvent && (it.event as ReportEvent).reportType.contains(type)
         } != null
     }
 
-    // Model Observers
-    private var listeners = setOf<Listener>()
-
-    fun subscribe(listener: Listener) {
-        listeners = listeners.plus(listener)
+    fun anyNameStartsWith(username: String): Boolean {
+        return info?.anyNameStartsWith(username) ?: false
     }
 
-    fun unsubscribe(listener: Listener) {
-        listeners = listeners.minus(listener)
+    var liveSet: UserLiveSet? = null
+
+    fun live(): UserLiveSet {
+        if (liveSet == null) {
+            liveSet = UserLiveSet(this)
+        }
+        return liveSet!!
     }
 
-    abstract class Listener {
-        open fun onRelayChange() = Unit
-        open fun onFollowsChange() = Unit
-        open fun onNewTaggedPosts() = Unit
-        open fun onNewNotes() = Unit
-        open fun onNewMessage() = Unit
-        open fun onNewRelayInfo() = Unit
-        open fun onNewReports() = Unit
-    }
-
-    // Refreshes observers in batches.
-    var modelHandlerWaiting = AtomicBoolean()
-
-    @Synchronized
-    fun updateSubscribers(on: (Listener) -> Unit) {
-        if (modelHandlerWaiting.getAndSet(true)) return
-
-        modelHandlerWaiting.set(true)
-        val scope = CoroutineScope(Job() + Dispatchers.Default)
-        scope.launch {
-            delay(100)
-            listeners.forEach {
-                on(it)
-            }
-            modelHandlerWaiting.set(false)
+    fun clearLive() {
+        if (liveSet != null && liveSet?.isInUse() == false) {
+            liveSet = null
         }
     }
-
-    // UI Observers line up here.
-    val liveFollows: UserLiveData = UserLiveData(this)
-    val liveReports: UserLiveData = UserLiveData(this)
-    val liveMessages: UserLiveData = UserLiveData(this)
-    val liveRelays: UserLiveData = UserLiveData(this)
-    val liveRelayInfo: UserLiveData = UserLiveData(this)
-    val liveMetadata: UserLiveData = UserLiveData(this)
 }
 
+class UserLiveSet(u: User) {
+    // UI Observers line up here.
+    val follows: UserLiveData = UserLiveData(u)
+    val reports: UserLiveData = UserLiveData(u)
+    val messages: UserLiveData = UserLiveData(u)
+    val relays: UserLiveData = UserLiveData(u)
+    val relayInfo: UserLiveData = UserLiveData(u)
+    val metadata: UserLiveData = UserLiveData(u)
+    val zaps: UserLiveData = UserLiveData(u)
+
+    fun isInUse(): Boolean {
+        return follows.hasObservers()
+          || reports.hasObservers()
+          || messages.hasObservers()
+          || relays.hasObservers()
+          || relayInfo.hasObservers()
+          || metadata.hasObservers()
+          || zaps.hasObservers()
+    }
+}
+
+data class RelayInfo (
+    val url: String,
+    var lastEvent: Long,
+    var counter: Long
+)
+
+data class Chatroom(var roomMessages: Set<Note>)
+
 class UserMetadata {
     var name: String? = null
     var username: String? = null
@@ -311,7 +351,11 @@ class UserMetadata {
     var banner: String? = null
     var website: String? = null
     var about: String? = null
+
     var nip05: String? = null
+    var nip05Verified: Boolean = false
+    var nip05LastVerificationTime: Long? = 0
+
     var domain: String? = null
     var lud06: String? = null
     var lud16: String? = null
@@ -321,6 +365,9 @@ class UserMetadata {
     var main_relay: String? = null
     var twitter: String? = null
 
+    var updatedMetadataAt: Long = 0;
+    var latestMetadata: MetadataEvent? = null
+
     fun anyNameStartsWith(prefix: String): Boolean {
         return listOfNotNull(name, username, display_name, displayName, nip05, lud06, lud16)
               .filter { it.startsWith(prefix, true) }.isNotEmpty()
@@ -334,15 +381,19 @@ class UserLiveData(val user: User): LiveData<UserState>(UserState(user)) {
 
     @Synchronized
     fun invalidateData() {
-        if (!hasActiveObservers()) return
         if (handlerWaiting.getAndSet(true)) return
 
         handlerWaiting.set(true)
         val scope = CoroutineScope(Job() + Dispatchers.Main)
         scope.launch {
-            delay(100)
-            refresh()
-            handlerWaiting.set(false)
+            try {
+                delay(100)
+                refresh()
+            } finally {
+                withContext(NonCancellable) {
+                    handlerWaiting.set(false)
+                }
+            }
         }
     }
 
@@ -352,13 +403,14 @@ class UserLiveData(val user: User): LiveData<UserState>(UserState(user)) {
 
     override fun onActive() {
         super.onActive()
-        NostrSingleUserDataSource.add(user.pubkeyHex)
+        NostrSingleUserDataSource.add(user)
     }
 
     override fun onInactive() {
         super.onInactive()
-        NostrSingleUserDataSource.remove(user.pubkeyHex)
+        NostrSingleUserDataSource.remove(user)
     }
 }
 
 class UserState(val user: User)
+

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

@@ -0,0 +1,93 @@
+package com.vitorpamplona.amethyst.service
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+
+class Nip05Verifier {
+  val client = OkHttpClient.Builder().build()
+
+  fun assembleUrl(nip05address: String): String? {
+    val parts = nip05address.trim().split("@")
+
+    if (parts.size == 2) {
+      return "https://${parts[1]}/.well-known/nostr.json?name=${parts[0]}"
+    }
+
+    return null
+  }
+
+  fun fetchNip05Json(lnaddress: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val scope = CoroutineScope(Job() + Dispatchers.IO)
+    scope.launch {
+      fetchNip05JsonSuspend(lnaddress, onSuccess, onError)
+    }
+  }
+
+  private suspend fun fetchNip05JsonSuspend(nip05: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val url = assembleUrl(nip05)
+
+    if (url == null) {
+      onError("Could not assemble url from Nip05: \"${nip05}\". Check the user's setup")
+      return
+    }
+
+    withContext(Dispatchers.IO) {
+      try {
+        val request: Request = Request.Builder().url(url).build()
+
+        client.newCall(request).enqueue(object : Callback {
+          override fun onResponse(call: Call, response: Response) {
+            response.use {
+              if (it.isSuccessful)
+                onSuccess(it.body.string())
+              else
+                onError("Could not resolve ${nip05}. Error: ${it.code}. Check if the server up and if the address ${nip05} is correct")
+            }
+          }
+
+          override fun onFailure(call: Call, e: java.io.IOException) {
+            onError("Could not resolve ${url}. Check if the server up and if the address ${nip05} is correct")
+            e.printStackTrace()
+          }
+        })
+      } catch (e: java.lang.Exception) {
+        onError("Could not resolve '${url}': ${e.message}")
+      }
+    }
+  }
+
+  fun verifyNip05(nip05: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val mapper = jacksonObjectMapper()
+
+    fetchNip05Json(nip05,
+      onSuccess = {
+        val nip05url = try {
+          mapper.readTree(it)
+        } catch (t: Throwable) {
+          onError("Error Parsing JSON from Lightning Address. Check the user's lightning setup")
+          null
+        }
+
+        val user = nip05.split("@")[0]
+
+        val hexKey = nip05url?.get("names")?.get(user)?.asText()
+
+        if (hexKey == null) {
+          onError("Username not found in the NIP05 JSON")
+        } else {
+          onSuccess(hexKey)
+        }
+      },
+      onError = onError
+    )
+  }
+}

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

@@ -1,8 +1,9 @@
 package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
+import com.vitorpamplona.amethyst.service.model.LnZapEvent
+import com.vitorpamplona.amethyst.service.model.ReactionEvent
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
@@ -12,7 +13,7 @@ import nostr.postr.events.ContactListEvent
 import nostr.postr.events.MetadataEvent
 import nostr.postr.events.TextNoteEvent
 
-object NostrAccountDataSource: NostrDataSource<Note>("AccountData") {
+object NostrAccountDataSource: NostrDataSource("AccountData") {
   lateinit var account: Account
 
   fun createAccountContactListFilter(): TypedFilter {
@@ -50,6 +51,9 @@ object NostrAccountDataSource: NostrDataSource<Note>("AccountData") {
   fun createNotificationFilter() = TypedFilter(
     types = FeedType.values().toSet(),
     filter = JsonFilter(
+      kinds = listOf(
+        TextNoteEvent.kind, ReactionEvent.kind, RepostEvent.kind, ReportEvent.kind, LnZapEvent.kind, ChannelMessageEvent.kind
+      ),
       tags = mapOf("p" to listOf(account.userProfile().pubkeyHex)),
       limit = 200
     )
@@ -57,15 +61,6 @@ object NostrAccountDataSource: NostrDataSource<Note>("AccountData") {
 
   val accountChannel = requestNewChannel()
 
-  override fun feed(): List<Note> {
-    val user = account.userProfile()
-
-    return LocalCache.notes.values
-      .filter { (it.event is TextNoteEvent || it.event is RepostEvent) && it.author in user.follows }
-      .sortedBy { it.event?.createdAt }
-      .reversed()
-  }
-
   override fun updateChannelFilters() {
     // gets everthing about the user logged in
     accountChannel.typedFilters = listOf(

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

@@ -1,16 +1,14 @@
 package com.vitorpamplona.amethyst.service
 
-import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.Channel
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
 
-object NostrChannelDataSource: NostrDataSource<Note>("ChatroomFeed") {
-  lateinit var account: Account
-  var channel: com.vitorpamplona.amethyst.model.Channel? = null
+object NostrChannelDataSource: NostrDataSource("ChatroomFeed") {
+  var channel: Channel? = null
 
   fun loadMessagesBetween(channelId: String) {
     channel = LocalCache.getOrCreateChannel(channelId)
@@ -33,11 +31,6 @@ object NostrChannelDataSource: NostrDataSource<Note>("ChatroomFeed") {
 
   val messagesChannel = requestNewChannel()
 
-  // returns the last Note of each user.
-  override fun feed(): List<Note> {
-    return channel?.notes?.values?.filter { account.isAcceptable(it) }?.sortedBy { it.event?.createdAt }?.reversed() ?: emptyList()
-  }
-
   override fun updateChannelFilters() {
     messagesChannel.typedFilters = listOfNotNull(createMessagesToChannelFilter()).ifEmpty { null }
   }

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

@@ -2,20 +2,20 @@ package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
 import nostr.postr.events.PrivateDmEvent
 
-object NostrChatRoomDataSource: NostrDataSource<Note>("ChatroomFeed") {
+object NostrChatroomDataSource: NostrDataSource("ChatroomFeed") {
   lateinit var account: Account
   var withUser: User? = null
 
   fun loadMessagesBetween(accountIn: Account, userId: String) {
     account = accountIn
     withUser = LocalCache.users[userId]
+    resetFilters()
   }
 
   fun createMessagesToMeFilter(): TypedFilter? {
@@ -40,7 +40,7 @@ object NostrChatRoomDataSource: NostrDataSource<Note>("ChatroomFeed") {
     
     return if (myPeer != null) {
       TypedFilter(
-        types = setOf(FeedType.PUBLIC_CHATS),
+        types = setOf(FeedType.PRIVATE_DMS),
         filter = JsonFilter(
           kinds = listOf(PrivateDmEvent.kind),
           authors = listOf(account.userProfile().pubkeyHex),
@@ -54,13 +54,6 @@ object NostrChatRoomDataSource: NostrDataSource<Note>("ChatroomFeed") {
 
   val inandoutChannel = requestNewChannel()
 
-  // returns the last Note of each user.
-  override fun feed(): List<Note> {
-    val messages = account.userProfile().messages[withUser] ?: return emptyList()
-
-    return messages.filter { account.isAcceptable(it) }.sortedBy { it.event?.createdAt }.reversed()
-  }
-
   override fun updateChannelFilters() {
     inandoutChannel.typedFilters = listOfNotNull(createMessagesToMeFilter(), createMessagesFromMeFilter()).ifEmpty { null }
   }

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

@@ -1,7 +1,6 @@
 package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMetadataEvent
@@ -10,7 +9,7 @@ import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
 import nostr.postr.events.PrivateDmEvent
 
-object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
+object NostrChatroomListDataSource: NostrDataSource("MailBoxFeed") {
   lateinit var account: Account
 
   fun createMessagesToMeFilter() = TypedFilter(
@@ -38,7 +37,7 @@ object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
   )
 
   fun createMyChannelsFilter() = TypedFilter(
-    types = setOf(FeedType.PUBLIC_CHATS),
+    types = FeedType.values().toSet(), // Metadata comes from any relay
       filter = JsonFilter(
       kinds = listOf(ChannelCreateEvent.kind),
       ids = account.followingChannels.toList()
@@ -48,7 +47,7 @@ object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
   fun createLastChannelInfoFilter(): List<TypedFilter> {
     return account.followingChannels.map {
       TypedFilter(
-        types = setOf(FeedType.PUBLIC_CHATS),
+        types = FeedType.values().toSet(), // Metadata comes from any relay
         filter = JsonFilter(
           kinds = listOf(ChannelMetadataEvent.kind),
           tags = mapOf("e" to listOf(it)),
@@ -65,7 +64,7 @@ object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
         filter = JsonFilter(
           kinds = listOf(ChannelMessageEvent.kind),
           tags = mapOf("e" to listOf(it)),
-          limit = 1
+          limit = 100 // Remember to consider spam that is being removed from the UI
         )
       )
     }
@@ -73,22 +72,6 @@ object NostrChatroomListDataSource: NostrDataSource<Note>("MailBoxFeed") {
 
   val chatroomListChannel = requestNewChannel()
 
-  // returns the last Note of each user.
-  override fun feed(): List<Note> {
-    val messages = account.userProfile().messages
-    val messagingWith = messages.keys.filter { account.isAcceptable(it) }
-
-    val privateMessages = messagingWith.mapNotNull {
-      messages[it]?.sortedBy { it.event?.createdAt }?.lastOrNull { it.event != null }
-    }
-
-    val publicChannels = account.followingChannels().map {
-      it.notes.values.filter { account.isAcceptable(it) }.sortedBy { it.event?.createdAt }.lastOrNull { it.event != null }
-    }
-
-    return (privateMessages + publicChannels).filterNotNull().sortedBy { it.event?.createdAt }.reversed()
-  }
-
   override fun updateChannelFilters() {
     val list = listOf(
       createMessagesToMeFilter(),

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

@@ -1,19 +1,20 @@
 package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.model.UrlCachedPreviewer
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
 import com.vitorpamplona.amethyst.service.model.ChannelHideMessageEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMetadataEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMuteUserEvent
+import com.vitorpamplona.amethyst.service.model.LnZapEvent
+import com.vitorpamplona.amethyst.service.model.LnZapRequestEvent
 import com.vitorpamplona.amethyst.service.model.ReactionEvent
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
 import com.vitorpamplona.amethyst.service.relays.Client
 import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.service.relays.Subscription
+import com.vitorpamplona.amethyst.service.relays.hasValidSignature
 import java.util.Date
 import java.util.UUID
 import kotlinx.coroutines.CoroutineScope
@@ -29,25 +30,29 @@ import nostr.postr.events.PrivateDmEvent
 import nostr.postr.events.RecommendRelayEvent
 import nostr.postr.events.TextNoteEvent
 
-abstract class NostrDataSource<T>(val debugName: String) {
+abstract class NostrDataSource(val debugName: String) {
   private var subscriptions = mapOf<String, Subscription>()
-  private var eventCounter = mapOf<String, Int>()
+  data class Counter(var counter:Int)
+
+  private var eventCounter = mapOf<String, Counter>()
 
   fun printCounter() {
     eventCounter.forEach {
-      println("AAA Count ${it.key}: ${it.value}")
+      println("AAA Count ${it.key}: ${it.value.counter}")
     }
   }
 
   private val clientListener = object : Client.Listener() {
     override fun onEvent(event: Event, subscriptionId: String, relay: Relay) {
       if (subscriptionId in subscriptions.keys) {
+        if (!event.hasValidSignature()) return
+
         val key = "${debugName} ${subscriptionId} ${event.kind}"
         val keyValue = eventCounter.get(key)
         if (keyValue != null) {
-          eventCounter = eventCounter + Pair(key, keyValue + 1)
+          keyValue.counter++
         } else {
-          eventCounter = eventCounter + Pair(key, 1)
+          eventCounter = eventCounter + Pair(key, Counter(1))
         }
 
         try {
@@ -66,7 +71,15 @@ abstract class NostrDataSource<T>(val debugName: String) {
                 LocalCache.consume(repostEvent)
               }
               ReactionEvent.kind -> LocalCache.consume(ReactionEvent(event.id, event.pubKey, event.createdAt, event.tags, event.content, event.sig))
-              ReportEvent.kind -> LocalCache.consume(ReportEvent(event.id, event.pubKey, event.createdAt, event.tags, event.content, event.sig))
+              ReportEvent.kind -> LocalCache.consume(ReportEvent(event.id, event.pubKey, event.createdAt, event.tags, event.content, event.sig), relay)
+
+              LnZapEvent.kind -> {
+                val zapEvent = LnZapEvent(event.id, event.pubKey, event.createdAt, event.tags, event.content, event.sig)
+
+                zapEvent.containedPost?.let { onEvent(it, subscriptionId, relay) }
+                LocalCache.consume(zapEvent)
+              }
+              LnZapRequestEvent.kind -> LocalCache.consume(LnZapRequestEvent(event.id, event.pubKey, event.createdAt, event.tags, event.content, event.sig))
 
               ChannelCreateEvent.kind -> LocalCache.consume(ChannelCreateEvent(event.id, event.pubKey, event.createdAt, event.tags, event.content, event.sig))
               ChannelMetadataEvent.kind -> LocalCache.consume(ChannelMetadataEvent(event.id, event.pubKey, event.createdAt, event.tags, event.content, event.sig))
@@ -115,28 +128,8 @@ abstract class NostrDataSource<T>(val debugName: String) {
 
   open fun stop() {
     subscriptions.values.forEach { channel ->
-      if (channel.typedFilters != null) // if it is active, close
-        Client.close(channel.id)
-    }
-  }
-
-  fun loadTop(): List<T> {
-    val returningList = feed().take(100)
-
-    // prepare previews
-    val scope = CoroutineScope(Job() + Dispatchers.IO)
-    scope.launch {
-      loadPreviews(returningList)
-    }
-
-    return returningList
-  }
-
-  fun loadPreviews(list: List<T>) {
-    list.forEach {
-      if (it is Note) {
-        UrlCachedPreviewer.preloadPreviewsFor(it)
-      }
+      Client.close(channel.id)
+      channel.typedFilters = null
     }
   }
 
@@ -212,5 +205,4 @@ abstract class NostrDataSource<T>(val debugName: String) {
   }
 
   abstract fun updateChannelFilters()
-  abstract fun feed(): List<T>
 }

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

@@ -1,15 +1,13 @@
 package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
 import nostr.postr.events.TextNoteEvent
 
-object NostrGlobalDataSource: NostrDataSource<Note>("GlobalFeed") {
+object NostrGlobalDataSource: NostrDataSource("GlobalFeed") {
   lateinit var account: Account
   fun createGlobalFilter() = TypedFilter(
     types = setOf(FeedType.GLOBAL),
@@ -21,15 +19,6 @@ object NostrGlobalDataSource: NostrDataSource<Note>("GlobalFeed") {
 
   val globalFeedChannel = requestNewChannel()
 
-  override fun feed() = LocalCache.notes.values
-    .filter { account.isAcceptable(it) }
-    .filter {
-      (it.event is TextNoteEvent && (it.event as TextNoteEvent).replyTos.isEmpty()) ||
-      (it.event is ChannelMessageEvent && (it.event as ChannelMessageEvent).replyTos.isEmpty())
-    }
-    .sortedBy { it.event?.createdAt }
-    .reversed()
-
   override fun updateChannelFilters() {
     globalFeedChannel.typedFilters = listOf(createGlobalFilter()).ifEmpty { null }
   }

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

@@ -1,16 +0,0 @@
-package com.vitorpamplona.amethyst.service
-
-import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.model.User
-import nostr.postr.JsonFilter
-import nostr.postr.events.TextNoteEvent
-
-object NostrHiddenAccountsDataSource: NostrDataSource<User>("HiddenAccounts") {
-  lateinit var account: Account
-
-  override fun feed() = account.hiddenUsers()
-
-  override fun updateChannelFilters() {}
-}

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

@@ -1,42 +1,45 @@
 package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.model.User
-import com.vitorpamplona.amethyst.service.model.RepostEvent
+import com.vitorpamplona.amethyst.model.UserState
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import nostr.postr.JsonFilter
 import nostr.postr.events.TextNoteEvent
-import nostr.postr.toHex
 
-object NostrHomeDataSource: NostrDataSource<Note>("HomeFeed") {
+object NostrHomeDataSource: NostrDataSource("HomeFeed") {
   lateinit var account: Account
 
-  object cacheListener: User.Listener() {
-    override fun onFollowsChange() {
-      resetFilters()
-    }
+  private val cacheListener: (UserState) -> Unit = {
+    invalidateFilters()
   }
 
   override fun start() {
-    if (this::account.isInitialized)
-      account.userProfile().subscribe(cacheListener)
+    if (this::account.isInitialized) {
+      GlobalScope.launch(Dispatchers.Main) {
+        account.userProfile().live().follows.observeForever(cacheListener)
+      }
+    }
     super.start()
   }
 
   override fun stop() {
     super.stop()
-    if (this::account.isInitialized)
-      account.userProfile().unsubscribe(cacheListener)
+    if (this::account.isInitialized) {
+      GlobalScope.launch(Dispatchers.Main) {
+        account.userProfile().live().follows.removeObserver(cacheListener)
+      }
+    }
   }
 
   fun createFollowAccountsFilter(): TypedFilter {
     val follows = account.userProfile().follows
 
     val followKeys = follows.map {
-      it.pubkey.toHex().substring(0, 6)
+      it.pubkeyHex.substring(0, 6)
     }
 
     val followSet = followKeys.plus(account.userProfile().pubkeyHex.substring(0, 6))
@@ -44,7 +47,7 @@ object NostrHomeDataSource: NostrDataSource<Note>("HomeFeed") {
     return TypedFilter(
       types = setOf(FeedType.FOLLOWS),
       filter = JsonFilter(
-        kinds = listOf(TextNoteEvent.kind, RepostEvent.kind),
+        kinds = listOf(TextNoteEvent.kind),
         authors = followSet,
         limit = 400
       )
@@ -53,16 +56,6 @@ object NostrHomeDataSource: NostrDataSource<Note>("HomeFeed") {
 
   val followAccountChannel = requestNewChannel()
 
-  override fun feed(): List<Note> {
-    val user = account.userProfile()
-
-    return LocalCache.notes.values
-      .filter { (it.event is TextNoteEvent || it.event is RepostEvent) && it.author in user.follows }
-      .filter { account.isAcceptable(it) }
-      .sortedBy { it.event?.createdAt }
-      .reversed()
-  }
-
   override fun updateChannelFilters() {
     followAccountChannel.typedFilters = listOf(createFollowAccountsFilter()).ifEmpty { null }
   }

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

@@ -1,28 +0,0 @@
-package com.vitorpamplona.amethyst.service
-
-import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.model.User
-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.RepostEvent
-import nostr.postr.JsonFilter
-
-object NostrNotificationDataSource: NostrDataSource<Note>("NotificationFeed") {
-  lateinit var account: Account
-
-  override fun feed(): List<Note> {
-    return account.userProfile().taggedPosts
-      .filter { it.event != null }
-      .filter { account.isAcceptable(it) }
-      .filter {
-           it.event !is ChannelCreateEvent
-        && it.event !is ChannelMetadataEvent
-      }
-      .sortedBy { it.event?.createdAt }
-      .reversed()
-  }
-
-  override fun updateChannelFilters() {}
-}

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

@@ -1,17 +1,14 @@
 package com.vitorpamplona.amethyst.service
 
-import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.decodePublicKey
-import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
 import nostr.postr.bechToBytes
 import nostr.postr.events.MetadataEvent
-import nostr.postr.events.TextNoteEvent
 import nostr.postr.toHex
 
-object NostrSearchEventOrUserDataSource: NostrDataSource<Note>("SingleEventFeed") {
+object NostrSearchEventOrUserDataSource: NostrDataSource("SingleEventFeed") {
   private var hexToWatch: String? = null
 
   private fun createAnythingWithIDFilter(): List<TypedFilter>? {
@@ -39,10 +36,6 @@ object NostrSearchEventOrUserDataSource: NostrDataSource<Note>("SingleEventFeed"
 
   val searchChannel = requestNewChannel()
 
-  override fun feed(): List<Note> {
-    return emptyList<Note>()
-  }
-
   override fun updateChannelFilters() {
     searchChannel.typedFilters = createAnythingWithIDFilter()
   }

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

@@ -1,14 +1,13 @@
 package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMetadataEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
 
-object NostrSingleChannelDataSource: NostrDataSource<Note>("SingleChannelFeed") {
+object NostrSingleChannelDataSource: NostrDataSource("SingleChannelFeed") {
   private var channelsToWatch = setOf<String>()
 
   private fun createRepliesAndReactionsFilter(): TypedFilter? {
@@ -51,10 +50,6 @@ object NostrSingleChannelDataSource: NostrDataSource<Note>("SingleChannelFeed")
 
   val singleChannelChannel = requestNewChannel()
 
-  override fun feed(): List<Note> {
-    return emptyList()
-  }
-
   override fun updateChannelFilters() {
     val reactions = createRepliesAndReactionsFilter()
     val missing = createLoadEventsIfNotLoadedFilter()

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

@@ -1,10 +1,11 @@
 package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
 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.LnZapEvent
+import com.vitorpamplona.amethyst.service.model.LnZapRequestEvent
 import com.vitorpamplona.amethyst.service.model.ReactionEvent
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
@@ -14,7 +15,7 @@ import java.util.Date
 import nostr.postr.JsonFilter
 import nostr.postr.events.TextNoteEvent
 
-object NostrSingleEventDataSource: NostrDataSource<Note>("SingleEventFeed") {
+object NostrSingleEventDataSource: NostrDataSource("SingleEventFeed") {
   private var eventsToWatch = setOf<String>()
 
   private fun createRepliesAndReactionsFilter(): List<TypedFilter>? {
@@ -27,14 +28,14 @@ object NostrSingleEventDataSource: NostrDataSource<Note>("SingleEventFeed") {
     val now = Date().time / 1000
 
     return reactionsToWatch.filter {
-      val lastTime = it.lastReactionsDownloadTime;
+      val lastTime = it.lastReactionsDownloadTime
       lastTime == null || lastTime < (now - 10)
     }.map {
       TypedFilter(
         types = FeedType.values().toSet(),
         filter = JsonFilter(
           kinds = listOf(
-            TextNoteEvent.kind, ReactionEvent.kind, RepostEvent.kind, ReportEvent.kind
+            TextNoteEvent.kind, ReactionEvent.kind, RepostEvent.kind, ReportEvent.kind, LnZapEvent.kind, LnZapRequestEvent.kind
           ),
           tags = mapOf("e" to listOf(it.idHex)),
           since = it.lastReactionsDownloadTime
@@ -68,7 +69,7 @@ object NostrSingleEventDataSource: NostrDataSource<Note>("SingleEventFeed") {
         types = FeedType.values().toSet(),
         filter = JsonFilter(
           kinds = listOf(
-            TextNoteEvent.kind, ReactionEvent.kind, RepostEvent.kind,
+            TextNoteEvent.kind, ReactionEvent.kind, RepostEvent.kind, LnZapEvent.kind, LnZapRequestEvent.kind,
             ChannelMessageEvent.kind, ChannelCreateEvent.kind, ChannelMetadataEvent.kind
           ),
           ids = interestedEvents.toList()
@@ -77,7 +78,7 @@ object NostrSingleEventDataSource: NostrDataSource<Note>("SingleEventFeed") {
     )
   }
 
-  val singleEventChannel = requestNewChannel() { time ->
+  val singleEventChannel = requestNewChannel { time ->
     eventsToWatch.forEach {
       LocalCache.getOrCreateNote(it).lastReactionsDownloadTime = time
     }
@@ -86,14 +87,6 @@ object NostrSingleEventDataSource: NostrDataSource<Note>("SingleEventFeed") {
     invalidateFilters()
   }
 
-  override fun feed(): List<Note> {
-    return synchronized(eventsToWatch) {
-      eventsToWatch.map {
-        LocalCache.notes[it]
-      }.filterNotNull()
-    }
-  }
-
   override fun updateChannelFilters() {
     val reactions = createRepliesAndReactionsFilter()
     val missing = createLoadEventsIfNotLoadedFilter()

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

@@ -1,6 +1,5 @@
 package com.vitorpamplona.amethyst.service
 
-import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.model.ReportEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
@@ -8,18 +7,18 @@ import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
 import nostr.postr.events.MetadataEvent
 
-object NostrSingleUserDataSource: NostrDataSource<User>("SingleUserFeed") {
-  var usersToWatch = setOf<String>()
+object NostrSingleUserDataSource: NostrDataSource("SingleUserFeed") {
+  var usersToWatch = setOf<User>()
 
   fun createUserFilter(): List<TypedFilter>? {
     if (usersToWatch.isEmpty()) return null
 
-    return usersToWatch.filter { LocalCache.getOrCreateUser(it).latestMetadata == null }.map {
+    return usersToWatch.filter { it.info?.latestMetadata == null }.map {
       TypedFilter(
         types = FeedType.values().toSet(),
         filter = JsonFilter(
           kinds = listOf(MetadataEvent.kind),
-          authors = listOf(it),
+          authors = listOf(it.pubkeyHex),
           limit = 1
         )
       )
@@ -34,7 +33,8 @@ object NostrSingleUserDataSource: NostrDataSource<User>("SingleUserFeed") {
         types = FeedType.values().toSet(),
         filter = JsonFilter(
           kinds = listOf(ReportEvent.kind),
-          tags = mapOf("p" to listOf(it))
+          tags = mapOf("p" to listOf(it.pubkeyHex)),
+          since = it.latestReportTime
         )
       )
     }
@@ -46,25 +46,20 @@ object NostrSingleUserDataSource: NostrDataSource<User>("SingleUserFeed") {
     invalidateFilters()
   }
 
-  override fun feed(): List<User> {
-    return synchronized(usersToWatch) {
-      usersToWatch.map {
-        LocalCache.users[it]
-      }.filterNotNull()
-    }
-  }
+  val userChannelOnce = requestNewChannel()
 
   override fun updateChannelFilters() {
-    userChannel.typedFilters = listOfNotNull(createUserFilter(), createUserReportFilter()).flatten()
+    userChannel.typedFilters = listOfNotNull(createUserFilter()).flatten().ifEmpty { null }
+    userChannelOnce.typedFilters = listOfNotNull(createUserReportFilter()).flatten().ifEmpty { null }
   }
 
-  fun add(userId: String) {
-    usersToWatch = usersToWatch.plus(userId)
+  fun add(user: User) {
+    usersToWatch = usersToWatch.plus(user)
     invalidateFilters()
   }
 
-  fun remove(userId: String) {
-    usersToWatch = usersToWatch.minus(userId)
+  fun remove(user: User) {
+    usersToWatch = usersToWatch.minus(user)
     invalidateFilters()
   }
 }

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

@@ -1,118 +1,43 @@
 package com.vitorpamplona.amethyst.service
 
-import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.service.model.ReactionEvent
-import com.vitorpamplona.amethyst.service.model.RepostEvent
+import com.vitorpamplona.amethyst.model.ThreadAssembler
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
-import nostr.postr.events.TextNoteEvent
 
-object NostrThreadDataSource: NostrDataSource<Note>("SingleThreadFeed") {
-  private var eventsToWatch = setOf<String>()
-
-  fun createRepliesAndReactionsFilter(): TypedFilter? {
-    if (eventsToWatch.isEmpty()) {
-      return null
-    }
-
-    return TypedFilter(
-      types = FeedType.values().toSet(),
-      filter = JsonFilter(
-        kinds = listOf(TextNoteEvent.kind, ReactionEvent.kind, RepostEvent.kind),
-        tags = mapOf("e" to eventsToWatch.toList())
-      )
-    )
-  }
+object NostrThreadDataSource: NostrDataSource("SingleThreadFeed") {
+  private var eventToWatch: String? = null
 
   fun createLoadEventsIfNotLoadedFilter(): TypedFilter? {
-    val nodes = eventsToWatch.map { LocalCache.getOrCreateNote(it) }
+    val threadToLoad = eventToWatch ?: return null
 
-    val eventsToLoad = nodes
+    val eventsToLoad = ThreadAssembler().findThreadFor(threadToLoad)
       .filter { it.event == null }
-      .map { it.idHex.substring(0, 8) }
-
-    if (eventsToLoad.isEmpty()) {
-      return null
-    }
+      .map { it.idHex }
+      .toSet()
+      .ifEmpty { null } ?: return null
 
     return TypedFilter(
       types = FeedType.values().toSet(),
       filter = JsonFilter(
-        ids = eventsToLoad
+        ids = eventsToLoad.map { it.substring(0, 8) }
       )
     )
   }
 
-  val loadEventsChannel = requestNewChannel()
-
-  override fun feed(): List<Note> {
-    // Currently orders by date of each event, descending, at each level of the reply stack
-    val order = compareByDescending<Note> { it.replyLevelSignature() }
-
-    return eventsToWatch.map {
-      LocalCache.getOrCreateNote(it)
-    }.sortedWith(order)
-  }
-
-  override fun updateChannelFilters() {
-    loadEventsChannel.typedFilters = listOfNotNull(createLoadEventsIfNotLoadedFilter(), createRepliesAndReactionsFilter()).ifEmpty { null }
-  }
-
-  fun searchRoot(note: Note, testedNotes: MutableSet<Note> = mutableSetOf()): Note? {
-    if (note.replyTo == null || note.replyTo?.isEmpty() == true) return note
-
-    val markedAsRoot = note.event?.tags?.firstOrNull { it[0] == "e" && it.size > 3 && it[3] == "root" }?.getOrNull(1)
-    if (markedAsRoot != null) return LocalCache.getOrCreateNote(markedAsRoot)
-
-    val hasNoReplyTo = note.replyTo?.firstOrNull { it.replyTo?.isEmpty() == true }
-    if (hasNoReplyTo != null) return hasNoReplyTo
-
-    testedNotes.add(note)
-
-    // recursive
-    val roots = note.replyTo?.map {
-      if (it !in testedNotes)
-        searchRoot(it, testedNotes)
-      else
-        null
-    }?.filterNotNull()
-
-    if (roots != null && roots.isNotEmpty()) {
-      return roots[0]
-    }
-
-    return null
-  }
-
-  fun loadThread(noteId: String) {
-    val note = LocalCache.getOrCreateNote(noteId)
-
-    if (note.event != null) {
-      val thread = mutableListOf<Note>()
-      val threadSet = mutableSetOf<Note>()
-
-      val threadRoot = searchRoot(note) ?: note
-
-      loadDown(threadRoot, thread, threadSet)
-
-      eventsToWatch = thread.map { it.idHex }.toSet()
-    } else {
-      eventsToWatch = setOf(noteId)
-    }
-
+  val loadEventsChannel = requestNewChannel(){
+    // Many relays operate with limits in the amount of filters.
+    // As information comes, the filters will be rotated to get more data.
     invalidateFilters()
   }
 
-  fun loadDown(note: Note, thread: MutableList<Note>, threadSet: MutableSet<Note>) {
-    if (note !in threadSet) {
-      thread.add(note)
-      threadSet.add(note)
+  override fun updateChannelFilters() {
+    loadEventsChannel.typedFilters = listOfNotNull(createLoadEventsIfNotLoadedFilter()).ifEmpty { null }
+  }
 
-      note.replies.forEach {
-        loadDown(it, thread, threadSet)
-      }
-    }
+  fun loadThread(noteId: String?) {
+    eventToWatch = noteId
+
+    invalidateFilters()
   }
 }

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

@@ -1,9 +1,8 @@
 package com.vitorpamplona.amethyst.service
 
-import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.model.LnZapEvent
 import com.vitorpamplona.amethyst.service.relays.FeedType
 import com.vitorpamplona.amethyst.service.relays.TypedFilter
 import nostr.postr.JsonFilter
@@ -11,72 +10,81 @@ import nostr.postr.events.ContactListEvent
 import nostr.postr.events.MetadataEvent
 import nostr.postr.events.TextNoteEvent
 
-object NostrUserProfileDataSource: NostrDataSource<Note>("UserProfileFeed") {
-  lateinit var account: Account
+object NostrUserProfileDataSource: NostrDataSource("UserProfileFeed") {
   var user: User? = null
 
-  fun loadUserProfile(userId: String) {
-    user = LocalCache.getOrCreateUser(userId)
+  fun loadUserProfile(userId: String?) {
+    if (userId != null) {
+      user = LocalCache.getOrCreateUser(userId)
+    } else {
+      user = null
+    }
+
     resetFilters()
   }
 
-  fun createUserInfoFilter(): TypedFilter {
-    return TypedFilter(
+  fun createUserInfoFilter() = user?.let {
+    TypedFilter(
       types = FeedType.values().toSet(),
       filter = JsonFilter(
         kinds = listOf(MetadataEvent.kind),
-        authors = listOf(user!!.pubkeyHex),
+        authors = listOf(it.pubkeyHex),
         limit = 1
       )
     )
   }
 
-  fun createUserPostsFilter(): TypedFilter {
-    return TypedFilter(
+  fun createUserPostsFilter() = user?.let {
+    TypedFilter(
       types = FeedType.values().toSet(),
       filter = JsonFilter(
         kinds = listOf(TextNoteEvent.kind),
-        authors = listOf(user!!.pubkeyHex),
-        limit = 100
+        authors = listOf(it.pubkeyHex),
+        limit = 200
       )
     )
   }
 
-  fun createFollowFilter(): TypedFilter {
-    return TypedFilter(
+  fun createUserReceivedZapsFilter() = user?.let {
+    TypedFilter(
+      types = FeedType.values().toSet(),
+      filter = JsonFilter(
+        kinds = listOf(LnZapEvent.kind),
+        tags = mapOf("p" to listOf(it.pubkeyHex))
+      )
+    )
+  }
+
+  fun createFollowFilter() = user?.let {
+    TypedFilter(
       types = FeedType.values().toSet(),
       filter = JsonFilter(
         kinds = listOf(ContactListEvent.kind),
-        authors = listOf(user!!.pubkeyHex),
+        authors = listOf(it.pubkeyHex),
         limit = 1
       )
     )
   }
 
-  fun createFollowersFilter() = TypedFilter(
-    types = FeedType.values().toSet(),
-    filter = JsonFilter(
-      kinds = listOf(ContactListEvent.kind),
-      tags = mapOf("p" to listOf(user!!.pubkeyHex))
+  fun createFollowersFilter() = user?.let {
+    TypedFilter(
+      types = FeedType.values().toSet(),
+      filter = JsonFilter(
+        kinds = listOf(ContactListEvent.kind),
+        tags = mapOf("p" to listOf(it.pubkeyHex))
+      )
     )
-  )
+  }
 
   val userInfoChannel = requestNewChannel()
 
-  override fun feed(): List<Note> {
-    return user?.notes
-      ?.filter { account.isAcceptable(it) }
-      ?.sortedBy { it.event?.createdAt }
-      ?.reversed()
-      ?: emptyList()
-  }
-
   override fun updateChannelFilters() {
-    userInfoChannel.typedFilters = listOf(
+    userInfoChannel.typedFilters = listOfNotNull(
       createUserInfoFilter(),
       createUserPostsFilter(),
       createFollowFilter(),
-      createFollowersFilter()
+      createFollowersFilter(),
+      createUserReceivedZapsFilter()
     ).ifEmpty { null }
   }
 }

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

@@ -1,23 +0,0 @@
-package com.vitorpamplona.amethyst.service
-
-import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.User
-import nostr.postr.JsonFilter
-import nostr.postr.events.ContactListEvent
-
-object NostrUserProfileFollowsDataSource: NostrDataSource<User>("UserProfileFollowsFeed") {
-  lateinit var account: Account
-  var user: User? = null
-
-  fun loadUserProfile(userId: String) {
-    user = LocalCache.users[userId]
-    resetFilters()
-  }
-
-  override fun feed(): List<User> {
-    return user?.follows?.filter { account.isAcceptable(it) } ?: emptyList()
-  }
-
-  override fun updateChannelFilters() {}
-}

app/src/main/java/com/vitorpamplona/amethyst/service/lang/LanguageTranslatorService.kt

@@ -8,7 +8,9 @@ import com.google.mlkit.nl.translate.TranslateLanguage
 import com.google.mlkit.nl.translate.Translation
 import com.google.mlkit.nl.translate.Translator
 import com.google.mlkit.nl.translate.TranslatorOptions
-import java.util.ArrayList
+import com.linkedin.urls.detection.UrlDetector
+import com.linkedin.urls.detection.UrlDetectorOptions
+import java.util.regex.Pattern
 
 class ResultOrError(
   var result: String?,
@@ -19,6 +21,7 @@ class ResultOrError(
 
 object LanguageTranslatorService {
   private val languageIdentification = LanguageIdentification.getClient()
+  val lnRegex = Pattern.compile("\\blnbc[a-z0-9]+\\b")
 
   private val translators =
     object : LruCache<TranslatorOptions, Translator>(10) {
@@ -43,6 +46,7 @@ object LanguageTranslatorService {
   fun translate(text: String, source: String, target: String): Task<ResultOrError> {
     val sourceLangCode = TranslateLanguage.fromLanguageTag(source)
     val targetLangCode = TranslateLanguage.fromLanguageTag(target)
+
     if (sourceLangCode == null || targetLangCode == null) {
       return Tasks.forCanceled()
     }
@@ -56,20 +60,67 @@ object LanguageTranslatorService {
 
     return translator.downloadModelIfNeeded().onSuccessTask {
       val tasks = mutableListOf<Task<String>>()
-      for (paragraph in text.split("\n")) {
+
+      val dict = lnDictionary(text) + urlDictionary(text)
+
+      for (paragraph in encodeDictionary(text, dict).split("\n")) {
         tasks.add(translator.translate(paragraph))
       }
 
       Tasks.whenAll(tasks).continueWith {
         val results: MutableList<String> = ArrayList()
         for (task in tasks) {
-          results.add(task.result)
+          var fixedText = task.result.replace("# [","#[") // fixes tags that always return with a space
+          results.add(decodeDictionary(fixedText, dict))
         }
         ResultOrError(results.joinToString("\n"), source, target, null)
       }
     }
   }
 
+  private fun encodeDictionary(text: String, dict: Map<String, String>): String {
+    var newText = text
+    for (pair in dict) {
+      newText = newText.replace(pair.value, pair.key, true)
+    }
+    return newText
+  }
+
+  private fun decodeDictionary(text: String, dict: Map<String, String>): String {
+    var newText = text
+    for (pair in dict) {
+      newText = newText.replace(pair.key, pair.value, true)
+    }
+    return newText
+  }
+
+  private fun lnDictionary(text: String): Map<String, String> {
+    val matcher = lnRegex.matcher(text)
+    val returningList = mutableMapOf<String, String>()
+    val counter = 0
+    while (matcher.find()) {
+      try {
+        val lnInvoice = matcher.group()
+        val short = "Amethystlnindexer${counter}"
+        returningList.put(short, lnInvoice)
+      } catch (e: Exception) {
+
+      }
+    }
+    return returningList
+  }
+
+  private fun urlDictionary(text: String): Map<String, String> {
+    val parser = UrlDetector(text, UrlDetectorOptions.Default)
+    val urlsInText = parser.detect()
+
+    val counter = 0
+
+    return urlsInText.filter { !it.originalUrl.contains("，") || !it.originalUrl.contains("。")  }.associate {
+      "Amethysturlindexer${counter}" to it.originalUrl
+    }
+  }
+
   fun autoTranslate(text: String, dontTranslateFrom: Set<String>, translateTo: String): Task<ResultOrError> {
     return identifyLanguage(text).onSuccessTask {
       if (it == translateTo) {

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

@@ -0,0 +1,163 @@
+package com.vitorpamplona.amethyst.service.lnurl
+
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import java.net.URLEncoder
+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.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+
+class LightningAddressResolver {
+  val client = OkHttpClient.Builder().build()
+
+  fun assembleUrl(lnaddress: String): String? {
+    val parts = lnaddress.split("@")
+
+    if (parts.size == 2) {
+      return "https://${parts[1]}/.well-known/lnurlp/${parts[0]}"
+    }
+
+    if (lnaddress.toLowerCase().startsWith("lnurl")) {
+      return try {
+        String(Bech32.decodeBytes(lnaddress, false).second)
+      } catch (e: Exception) {
+        null
+      }
+    }
+
+    return null
+  }
+
+  fun fetchLightningAddressJson(lnaddress: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val scope = CoroutineScope(Job() + Dispatchers.IO)
+    scope.launch {
+      fetchLightningAddressJsonSuspend(lnaddress, onSuccess, onError)
+    }
+  }
+
+  private suspend fun fetchLightningAddressJsonSuspend(lnaddress: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val url = assembleUrl(lnaddress)
+
+    if (url == null) {
+      onError("Could not assemble LNUrl from Lightning Address \"${lnaddress}\". Check the user's setup")
+      return
+    }
+
+    withContext(Dispatchers.IO) {
+      val request: Request = Request.Builder().url(url).build()
+
+      client.newCall(request).enqueue(object : Callback {
+        override fun onResponse(call: Call, response: Response) {
+          response.use {
+            if (it.isSuccessful)
+              onSuccess(it.body.string())
+            else
+              onError("Could not resolve ${lnaddress}. Error: ${it.code}. Check if the server up and if the lightning address ${lnaddress} is correct")
+          }
+        }
+
+        override fun onFailure(call: Call, e: java.io.IOException) {
+          onError("Could not resolve ${url}. Check if the server up and if the lightning address ${lnaddress} is correct")
+          e.printStackTrace()
+        }
+      })
+    }
+  }
+
+  fun fetchLightningInvoice(lnCallback: String, milliSats: Long, message: String, nostrRequest: String? = null, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val scope = CoroutineScope(Job() + Dispatchers.IO)
+    scope.launch {
+      fetchLightningInvoiceSuspend(lnCallback, milliSats, message, nostrRequest, onSuccess, onError)
+    }
+  }
+
+  private suspend fun fetchLightningInvoiceSuspend(lnCallback: String, milliSats: Long, message: String, nostrRequest: String? = null, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    withContext(Dispatchers.IO) {
+      val encodedMessage = URLEncoder.encode(message, "utf-8")
+
+      val urlBinder = if (lnCallback.contains("?")) "&" else "?"
+      var url = "$lnCallback${urlBinder}amount=$milliSats&comment=$encodedMessage"
+
+      if (nostrRequest != null) {
+        val encodedNostrRequest = URLEncoder.encode(nostrRequest, "utf-8")
+        url += "&nostr=$encodedNostrRequest"
+      }
+
+      val request: Request = Request.Builder().url(url).build()
+
+      client.newCall(request).enqueue(object : Callback {
+        override fun onResponse(call: Call, response: Response) {
+          response.use {
+            if (it.isSuccessful)
+              onSuccess(response.body.string())
+            else
+              onError("Could not fetch invoice from $lnCallback")
+          }
+        }
+
+        override fun onFailure(call: Call, e: java.io.IOException) {
+          onError("Could not fetch an invoice from $lnCallback. Message ${e.message}")
+          e.printStackTrace()
+        }
+      })
+    }
+  }
+
+  fun lnAddressToLnUrl(lnaddress: String, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    fetchLightningAddressJson(lnaddress,
+      onSuccess = {
+        onSuccess(Bech32.encodeBytes("lnurl",it.toByteArray(), Bech32.Encoding.Bech32))
+      },
+      onError = onError
+    )
+  }
+
+  fun lnAddressInvoice(lnaddress: String, milliSats: Long, message: String, nostrRequest: String? = null, onSuccess: (String) -> Unit, onError: (String) -> Unit) {
+    val mapper = jacksonObjectMapper()
+
+    fetchLightningAddressJson(lnaddress,
+      onSuccess = {
+        val lnurlp = try {
+          mapper.readTree(it)
+        } catch (t: Throwable) {
+          onError("Error Parsing JSON from Lightning Address. Check the user's lightning setup")
+          null
+        }
+
+        val callback = lnurlp?.get("callback")?.asText()
+
+        if (callback == null) {
+          onError("Callback URL not found in the User's lightning address server configuration")
+        }
+
+        val allowsNostr = lnurlp?.get("allowsNostr")?.asBoolean() ?: false
+
+        callback?.let { callback ->
+          fetchLightningInvoice(callback, milliSats, message, if (allowsNostr) nostrRequest else null,
+            onSuccess = {
+              val lnInvoice = try {
+                mapper.readTree(it)
+              } catch (t: Throwable) {
+                onError("Error Parsing JSON from Lightning Address's invoice fetch. Check the user's lightning setup")
+                null
+              }
+
+              lnInvoice?.get("pr")?.asText()?.let { pr ->
+                onSuccess(pr)
+              } ?: onError("Invoice Not Created (element pr not found in the resulting JSON)")
+            },
+            onError = onError
+          )
+        }
+      },
+      onError = onError
+    )
+  }
+}

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

@@ -1,6 +1,5 @@
-package com.vitorpamplona.amethyst.lnurl
+package com.vitorpamplona.amethyst.service.lnurl
 
-import androidx.compose.ui.text.toLowerCase
 import java.math.BigDecimal
 import java.util.Locale
 import java.util.regex.Pattern

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

@@ -1,5 +1,6 @@
 package com.vitorpamplona.amethyst.service.model
 
+import android.util.Log
 import java.util.Date
 import nostr.postr.Utils
 import nostr.postr.events.Event
@@ -16,10 +17,11 @@ class ChannelCreateEvent (
   @Transient val channelInfo: ChannelData
 
   init {
-    try {
-      channelInfo = MetadataEvent.gson.fromJson(content, ChannelData::class.java)
+    channelInfo = try {
+      MetadataEvent.gson.fromJson(content, ChannelData::class.java)
     } catch (e: Exception) {
-      throw Error("can't parse $content", e)
+      Log.e("ChannelMetadataEvent", "Can't parse channel info $content", e)
+      ChannelData(null, null, null)
     }
   }
 
@@ -27,10 +29,15 @@ class ChannelCreateEvent (
     const val kind = 40
 
     fun create(channelInfo: ChannelData?, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ChannelCreateEvent {
-      val content = if (channelInfo != null)
-        gson.toJson(channelInfo)
-      else
+      val content = try {
+        if (channelInfo != null)
+          gson.toJson(channelInfo)
+        else
+          ""
+      } catch (t: Throwable) {
+        Log.e("ChannelCreateEvent", "Couldn't parse channel information", t)
         ""
+      }
 
       val pubKey = Utils.pubkeyCreate(privateKey)
       val tags = emptyList<List<String>>()

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

@@ -3,7 +3,6 @@ package com.vitorpamplona.amethyst.service.model
 import java.util.Date
 import nostr.postr.Utils
 import nostr.postr.events.Event
-import nostr.postr.toHex
 
 class ChannelHideMessageEvent (
   id: ByteArray,

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

@@ -3,7 +3,6 @@ package com.vitorpamplona.amethyst.service.model
 import java.util.Date
 import nostr.postr.Utils
 import nostr.postr.events.Event
-import nostr.postr.toHex
 
 class ChannelMessageEvent (
   id: ByteArray,

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

@@ -1,11 +1,10 @@
 package com.vitorpamplona.amethyst.service.model
 
+import android.util.Log
 import java.util.Date
-import nostr.postr.ContactMetaData
 import nostr.postr.Utils
 import nostr.postr.events.Event
 import nostr.postr.events.MetadataEvent
-import nostr.postr.toHex
 
 class ChannelMetadataEvent (
   id: ByteArray,
@@ -20,21 +19,24 @@ class ChannelMetadataEvent (
 
   init {
     channel = tags.firstOrNull { it.firstOrNull() == "e" }?.getOrNull(1)
-    try {
-      channelInfo = MetadataEvent.gson.fromJson(content, ChannelCreateEvent.ChannelData::class.java)
-    } catch (e: Exception) {
-      throw Error("can't parse $content", e)
-    }
+    channelInfo =
+      try {
+        MetadataEvent.gson.fromJson(content, ChannelCreateEvent.ChannelData::class.java)
+      } catch (e: Exception) {
+        Log.e("ChannelMetadataEvent", "Can't parse channel info $content", e)
+        ChannelCreateEvent.ChannelData(null, null, null)
+      }
   }
 
   companion object {
     const val kind = 41
 
     fun create(newChannelInfo: ChannelCreateEvent.ChannelData?, originalChannelIdHex: String, privateKey: ByteArray, createdAt: Long = Date().time / 1000): ChannelMetadataEvent {
-      val content = if (newChannelInfo != null)
-        gson.toJson(newChannelInfo)
-      else
-        ""
+      val content =
+        if (newChannelInfo != null)
+          gson.toJson(newChannelInfo)
+        else
+          ""
 
       val pubKey = Utils.pubkeyCreate(privateKey)
       val tags = listOf( listOf("e", originalChannelIdHex, "", "root") )

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

@@ -3,8 +3,6 @@ package com.vitorpamplona.amethyst.service.model
 import java.util.Date
 import nostr.postr.Utils
 import nostr.postr.events.Event
-import nostr.postr.events.MetadataEvent
-import nostr.postr.toHex
 
 class ChannelMuteUserEvent (
   id: ByteArray,

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

@@ -0,0 +1,47 @@
+package com.vitorpamplona.amethyst.service.model
+
+import com.vitorpamplona.amethyst.service.lnurl.LnInvoiceUtil
+import com.vitorpamplona.amethyst.service.relays.Client
+import java.math.BigDecimal
+import nostr.postr.events.Event
+
+class LnZapEvent (
+  id: ByteArray,
+  pubKey: ByteArray,
+  createdAt: Long,
+  tags: List<List<String>>,
+  content: String,
+  sig: ByteArray
+): Event(id, pubKey, createdAt, kind, tags, content, sig) {
+
+  @Transient val zappedPost: List<String>
+  @Transient val zappedAuthor: List<String>
+  @Transient val containedPost: Event?
+  @Transient val lnInvoice: String?
+  @Transient val preimage: String?
+  @Transient val amount: BigDecimal?
+
+  init {
+    zappedPost = tags.filter { it.firstOrNull() == "e" }.mapNotNull { it.getOrNull(1) }
+    zappedAuthor = tags.filter { it.firstOrNull() == "p" }.mapNotNull { it.getOrNull(1) }
+
+    lnInvoice = tags.filter { it.firstOrNull() == "bolt11" }.mapNotNull { it.getOrNull(1) }.firstOrNull()
+    amount = lnInvoice?.let { LnInvoiceUtil.getAmountInSats(lnInvoice) }
+    preimage = tags.filter { it.firstOrNull() == "preimage" }.mapNotNull { it.getOrNull(1) }.firstOrNull()
+
+    val description = tags.filter { it.firstOrNull() == "description" }.mapNotNull { it.getOrNull(1) }.firstOrNull()
+
+    containedPost = try {
+      if (description == null)
+        null
+      else
+        fromJson(description, Client.lenient)
+    } catch (e: Exception) {
+      null
+    }
+  }
+
+  companion object {
+    const val kind = 9735
+  }
+}

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

@@ -0,0 +1,87 @@
+package com.vitorpamplona.amethyst.service.model
+
+import java.util.Date
+import nostr.postr.Utils
+import nostr.postr.events.Event
+import nostr.postr.toHex
+
+class LnZapRequestEvent (
+  id: ByteArray,
+  pubKey: ByteArray,
+  createdAt: Long,
+  tags: List<List<String>>,
+  content: String,
+  sig: ByteArray
+): Event(id, pubKey, createdAt, kind, tags, content, sig) {
+
+  @Transient val zappedPost: List<String>
+  @Transient val zappedAuthor: List<String>
+
+  init {
+    zappedPost = tags.filter { it.firstOrNull() == "e" }.mapNotNull { it.getOrNull(1) }
+    zappedAuthor = tags.filter { it.firstOrNull() == "p" }.mapNotNull { it.getOrNull(1) }
+  }
+
+  companion object {
+    const val kind = 9734
+
+    fun create(originalNote: Event, relays: Set<String>, privateKey: ByteArray, createdAt: Long = Date().time / 1000): LnZapRequestEvent {
+      val content = ""
+      val pubKey = Utils.pubkeyCreate(privateKey)
+      val tags = listOf(
+        listOf("e", originalNote.id.toHex()),
+        listOf("p", originalNote.pubKey.toHex()),
+        listOf("relays") + relays
+      )
+      val id = generateId(pubKey, createdAt, kind, tags, content)
+      val sig = Utils.sign(id, privateKey)
+      return LnZapRequestEvent(id, pubKey, createdAt, tags, content, sig)
+    }
+
+    fun create(userHex: String, relays: Set<String>, privateKey: ByteArray, createdAt: Long = Date().time / 1000): LnZapRequestEvent {
+      val content = ""
+      val pubKey = Utils.pubkeyCreate(privateKey)
+      val tags = listOf(
+        listOf("p", userHex),
+        listOf("relays") + relays
+      )
+      val id = generateId(pubKey, createdAt, kind, tags, content)
+      val sig = Utils.sign(id, privateKey)
+      return LnZapRequestEvent(id, pubKey, createdAt, tags, content, sig)
+    }
+  }
+}
+
+/*
+{
+  "pubkey": "32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245",
+  "content": "",
+  "id": "d9cc14d50fcb8c27539aacf776882942c1a11ea4472f8cdec1dea82fab66279d",
+  "created_at": 1674164539,
+  "sig": "77127f636577e9029276be060332ea565deaf89ff215a494ccff16ae3f757065e2bc59b2e8c113dd407917a010b3abd36c8d7ad84c0e3ab7dab3a0b0caa9835d",
+  "kind": 9734,
+  "tags": [
+  [
+    "e",
+    "3624762a1274dd9636e0c552b53086d70bc88c165bc4dc0f9e836a1eaf86c3b8"
+  ],
+  [
+    "p",
+    "32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245"
+  ],
+  [
+    "relays",
+    "wss://relay.damus.io",
+    "wss://nostr-relay.wlvs.space",
+    "wss://nostr.fmt.wiz.biz",
+    "wss://relay.nostr.bg",
+    "wss://nostr.oxtr.dev",
+    "wss://nostr.v0l.io",
+    "wss://brb.io",
+    "wss://nostr.bitcoiner.social",
+    "ws://monad.jb55.com:8080",
+    "wss://relay.snort.social"
+  ]
+  ]
+}
+*/

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

@@ -1,6 +1,5 @@
 package com.vitorpamplona.amethyst.service.model
 
-import androidx.compose.ui.text.toUpperCase
 import java.util.Date
 import nostr.postr.Utils
 import nostr.postr.events.Event

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

@@ -1,6 +1,9 @@
 package com.vitorpamplona.amethyst.service.relays
 
 import java.util.UUID
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import nostr.postr.events.Event
 
 /**
@@ -23,6 +26,7 @@ object Client: RelayPool.Listener {
     private var relays = Constants.convertDefaultRelays()
     private var subscriptions = mapOf<String, List<TypedFilter>>()
 
+    @Synchronized
     fun connect(relays: Array<Relay>) {
         RelayPool.register(this)
         RelayPool.unloadRelays()
@@ -30,6 +34,20 @@ object Client: RelayPool.Listener {
         this.relays = relays
     }
 
+    fun isSameRelaySetConfig(newRelayConfig: Array<Relay>): Boolean {
+        if (relays.size != newRelayConfig.size) return false
+
+        relays.forEach { oldRelayInfo ->
+            val newRelayInfo = newRelayConfig.find { it.url == oldRelayInfo.url }
+
+            if (newRelayInfo == null) return false
+
+            if (!oldRelayInfo.isSameRelayConfig(newRelayInfo)) return false
+        }
+
+        return true
+    }
+
     fun sendFilter(
         subscriptionId: String = UUID.randomUUID().toString().substring(0..10),
         filters: List<TypedFilter> = listOf()
@@ -50,8 +68,9 @@ object Client: RelayPool.Listener {
         RelayPool.send(signedEvent)
     }
 
-    fun close(subscriptionId: String){
+    fun close(subscriptionId: String) {
         RelayPool.close(subscriptionId)
+        subscriptions = subscriptions.minus(subscriptionId)
     }
 
     fun disconnect() {
@@ -61,19 +80,35 @@ object Client: RelayPool.Listener {
     }
 
     override fun onEvent(event: Event, subscriptionId: String, relay: Relay) {
-        listeners.forEach { it.onEvent(event, subscriptionId, relay) }
+        // Releases the Web thread for the new payload.
+        // May need to add a processing queue if processing new events become too costly.
+        GlobalScope.launch(Dispatchers.Default) {
+            listeners.forEach { it.onEvent(event, subscriptionId, relay) }
+        }
     }
 
     override fun onError(error: Error, subscriptionId: String, relay: Relay) {
-        listeners.forEach { it.onError(error, subscriptionId, relay) }
+        // Releases the Web thread for the new payload.
+        // May need to add a processing queue if processing new events become too costly.
+        GlobalScope.launch(Dispatchers.Default) {
+            listeners.forEach { it.onError(error, subscriptionId, relay) }
+        }
     }
 
     override fun onRelayStateChange(type: Relay.Type, relay: Relay, channel: String?) {
-        listeners.forEach { it.onRelayStateChange(type, relay, channel) }
+        // Releases the Web thread for the new payload.
+        // May need to add a processing queue if processing new events become too costly.
+        GlobalScope.launch(Dispatchers.Default) {
+            listeners.forEach { it.onRelayStateChange(type, relay, channel) }
+        }
     }
 
     override fun onSendResponse(eventId: String, success: Boolean, message: String, relay: Relay) {
-        listeners.forEach { it.onSendResponse(eventId, success, message, relay) }
+        // Releases the Web thread for the new payload.
+        // May need to add a processing queue if processing new events become too costly.
+        GlobalScope.launch(Dispatchers.Default) {
+            listeners.forEach { it.onSendResponse(eventId, success, message, relay) }
+        }
     }
 
     fun subscribe(listener: Listener) {

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

@@ -0,0 +1,16 @@
+package com.vitorpamplona.amethyst.service.relays
+
+import fr.acinq.secp256k1.Secp256k1
+import nostr.postr.events.Event
+import nostr.postr.events.generateId
+
+fun Event.hasValidSignature(): Boolean {
+  if (!id.contentEquals(generateId())) {
+    return false
+  }
+  if (!Secp256k1.get().verifySchnorr(sig, id, pubKey)) {
+    return false
+  }
+
+  return true
+}

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

@@ -3,7 +3,6 @@ package com.vitorpamplona.amethyst.service.relays
 import android.util.Log
 import com.google.gson.JsonElement
 import java.util.Date
-import java.util.concurrent.TimeUnit
 import nostr.postr.events.Event
 import okhttp3.OkHttpClient
 import okhttp3.Request
@@ -22,9 +21,6 @@ class Relay(
     var activeTypes: Set<FeedType> = FeedType.values().toSet(),
 ) {
     private val httpClient = OkHttpClient.Builder()
-        .connectTimeout(100, TimeUnit.SECONDS)
-        .readTimeout(100, TimeUnit.SECONDS)
-        .callTimeout(100, TimeUnit.SECONDS)
         .followRedirects(true)
         .followSslRedirects(true)
         .build();
@@ -34,6 +30,7 @@ class Relay(
     private var isReady: Boolean = false
 
     var eventDownloadCounter = 0
+    var spamCounter = 0
     var eventUploadCounter = 0
     var errorCounter = 0
     var ping: Long? = null
@@ -148,6 +145,8 @@ class Relay(
 
             socket = httpClient.newWebSocket(request, listener)
         } catch (e: Exception) {
+            errorCounter++
+            isReady = false
             closingTime = Date().time / 1000
             Log.e("Relay", "Relay Invalid $url")
             e.printStackTrace()
@@ -175,8 +174,8 @@ class Relay(
                     }
                 }
             } else {
-                // waits 10 seconds to reconnect after disconnected.
-                if (Date().time / 1000 > closingTime + 10) {
+                // waits 60 seconds to reconnect after disconnected.
+                if (Date().time / 1000 > closingTime + 60) {
                     // sends all filters after connection is successful.
                     requestAndWatch()
                 }
@@ -186,8 +185,11 @@ class Relay(
 
     fun sendFilterOnlyIfDisconnected() {
         if (socket == null) {
-            //println("sendfilter Only if Disconnected ${url} ")
-            requestAndWatch()
+            // waits 60 seconds to reconnect after disconnected.
+            if (Date().time / 1000 > closingTime + 60) {
+                //println("sendfilter Only if Disconnected ${url} ")
+                requestAndWatch()
+            }
         }
     }
 
@@ -202,6 +204,13 @@ class Relay(
         socket?.send("""["CLOSE","$subscriptionId"]""")
     }
 
+    fun isSameRelayConfig(other: Relay): Boolean {
+        return url == other.url
+            && write == other.write
+            && read == other.read
+            && activeTypes == other.activeTypes
+    }
+
     enum class Type {
         // Websocket connected
         CONNECT,

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

@@ -1,6 +1,5 @@
 package com.vitorpamplona.amethyst.service.relays
 
-import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import com.google.gson.JsonArray
 import com.google.gson.JsonObject

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

@@ -1,6 +1,5 @@
 package com.vitorpamplona.amethyst.ui
 
-import android.net.Uri
 import android.os.Build.VERSION.SDK_INT
 import android.os.Bundle
 import androidx.activity.ComponentActivity
@@ -15,21 +14,13 @@ import coil.ImageLoader
 import coil.decode.GifDecoder
 import coil.decode.ImageDecoderDecoder
 import coil.decode.SvgDecoder
-import coil.memory.MemoryCache
-import coil.request.CachePolicy
-import com.vitorpamplona.amethyst.EncryptedStorage
 import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.ServiceManager
-import com.vitorpamplona.amethyst.model.decodePublicKey
-import com.vitorpamplona.amethyst.model.toHexKey
 import com.vitorpamplona.amethyst.service.Nip19
 import com.vitorpamplona.amethyst.service.relays.Client
 import com.vitorpamplona.amethyst.ui.screen.AccountScreen
 import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
 import com.vitorpamplona.amethyst.ui.theme.AmethystTheme
-import fr.acinq.secp256k1.Hex
-import nostr.postr.Persona
-import nostr.postr.bechToBytes
 
 class MainActivity : ComponentActivity() {
   override fun onCreate(savedInstanceState: Bundle?) {
@@ -50,7 +41,7 @@ class MainActivity : ComponentActivity() {
           add(GifDecoder.Factory())
         }
         add(SvgDecoder.Factory())
-      }
+      } //.logger(DebugLogger())
         .respectCacheHeaders(false)
         .build()
     }
@@ -60,11 +51,11 @@ class MainActivity : ComponentActivity() {
         // A surface container using the 'background' color from the theme
         Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background) {
 
-          val accountViewModel: AccountStateViewModel = viewModel {
+          val accountStateViewModel: AccountStateViewModel = viewModel {
             AccountStateViewModel(LocalPreferences(applicationContext))
           }
 
-          AccountScreen(accountViewModel, startingPage)
+          AccountScreen(accountStateViewModel, startingPage)
         }
       }
     }
@@ -74,7 +65,8 @@ class MainActivity : ComponentActivity() {
 
   override fun onResume() {
     super.onResume()
-
+    
+    // Only starts after login
     ServiceManager.start()
   }
 
@@ -83,4 +75,14 @@ class MainActivity : ComponentActivity() {
 
     super.onPause()
   }
+
+  /**
+   * Release memory when the UI becomes hidden or when system resources become low.
+   * @param level the memory-related event that was raised.
+   */
+  override fun onTrimMemory(level: Int) {
+    super.onTrimMemory(level)
+    println("Trim Memory $level")
+    ServiceManager.cleanUp()
+  }
 }

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

@@ -9,11 +9,11 @@ import android.os.Environment
 import android.provider.MediaStore
 import androidx.annotation.RequiresApi
 import androidx.core.net.toUri
+import java.io.File
 import okhttp3.*
 import okio.BufferedSource
 import okio.IOException
 import okio.sink
-import java.io.File
 
 
 object ImageSaver {

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

@@ -1,60 +1,82 @@
 package com.vitorpamplona.amethyst.ui.actions
 
-import android.graphics.Bitmap
+import android.content.ContentResolver
+import android.net.Uri
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
-import java.io.ByteArrayOutputStream
 import java.io.IOException
 import java.util.UUID
 import okhttp3.Call
 import okhttp3.Callback
+import okhttp3.MediaType
 import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.MultipartBody
 import okhttp3.OkHttpClient
 import okhttp3.Request
 import okhttp3.RequestBody
-import okhttp3.RequestBody.Companion.toRequestBody
 import okhttp3.Response
+import okio.BufferedSink
+import okio.source
 
 object ImageUploader {
-  private fun encodeImage(bitmap: Bitmap): ByteArray {
-    val byteArrayOutPutStream = ByteArrayOutputStream()
-    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutPutStream)
-    return byteArrayOutPutStream.toByteArray()
-  }
+  fun uploadImage(
+    uri: Uri,
+    contentResolver: ContentResolver,
+    onSuccess: (String) -> Unit,
+    onError: (Throwable) -> Unit,
+) {
+    val contentType = contentResolver.getType(uri)
 
-  fun uploadImage(bitmap: Bitmap, onSuccess: (String) -> Unit) {
     val client = OkHttpClient.Builder().build()
 
-    val body: RequestBody = MultipartBody.Builder()
+    val requestBody: RequestBody = MultipartBody.Builder()
       .setType(MultipartBody.FORM)
       .addFormDataPart(
         "image",
-        "${UUID.randomUUID()}.png",
-        encodeImage(bitmap).toRequestBody("image/png".toMediaType())
+        "${UUID.randomUUID()}",
+        object : RequestBody() {
+          override fun contentType(): MediaType? =
+            contentType?.toMediaType()
+
+          override fun writeTo(sink: BufferedSink) {
+            val imageInputStream = contentResolver.openInputStream(uri)
+            checkNotNull(imageInputStream) {
+              "Can't open the image input stream"
+            }
+
+            imageInputStream.source().use(sink::writeAll)
+          }
+        }
       )
       .build()
 
     val request: Request = Request.Builder()
       .url("https://api.imgur.com/3/image")
       .header("Authorization", "Client-ID e6aea87296f3f96")
-      .post(body)
+      .post(requestBody)
       .build()
 
     client.newCall(request).enqueue(object : Callback {
       override fun onResponse(call: Call, response: Response) {
-        response.use {
-          val body = response.body
-          if (body != null) {
+        try {
+          check(response.isSuccessful)
+          response.body.use { body ->
             val tree = jacksonObjectMapper().readTree(body.string())
             val url = tree?.get("data")?.get("link")?.asText()
-            if (url != null)
-              onSuccess(url)
+            checkNotNull(url) {
+              "There must be an uploaded image URL in the response"
+            }
+
+            onSuccess(url)
           }
+        } catch (e: Exception) {
+          e.printStackTrace()
+          onError(e)
         }
       }
 
       override fun onFailure(call: Call, e: IOException) {
         e.printStackTrace()
+        onError(e)
       }
     })
   }

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

@@ -17,18 +17,14 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.style.TextDirection
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
 import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Channel
-import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
-import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
 fun NewChannelView(onClose: () -> Unit, account: Account, channel: Channel? = null) {

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

@@ -4,12 +4,8 @@ import android.content.Context
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
-import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Channel
-import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
-import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
-import nostr.postr.toHex
 
 class NewChannelViewModel: ViewModel() {
     private var account: Account? = null
@@ -38,8 +34,6 @@ class NewChannelViewModel: ViewModel() {
                     channelDescription.value.text,
                     channelPicture.value.text
                 )
-
-                LocalPreferences(context).saveToEncryptedStorage(account)
             } else
                 account.sendChangeChannel(
                     channelName.value.text,

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

@@ -1,27 +1,15 @@
 package com.vitorpamplona.amethyst.ui.actions
 
+import android.widget.Toast
 import androidx.compose.foundation.border
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.PaddingValues
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.fillMaxHeight
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.KeyboardOptions
-import androidx.compose.material.Button
-import androidx.compose.material.ButtonDefaults
-import androidx.compose.material.Icon
-import androidx.compose.material.LocalTextStyle
-import androidx.compose.material.MaterialTheme
-import androidx.compose.material.OutlinedTextField
-import androidx.compose.material.Surface
-import androidx.compose.material.Text
-import androidx.compose.material.TextFieldDefaults
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.*
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.remember
@@ -37,11 +25,9 @@ import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalSoftwareKeyboardController
 import androidx.compose.ui.res.painterResource
-import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.style.TextDirection
 import androidx.compose.ui.unit.dp
-import androidx.compose.ui.unit.sp
 import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -49,161 +35,172 @@ import coil.compose.AsyncImage
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.ui.components.UrlPreview
-import com.vitorpamplona.amethyst.ui.components.VideoView
-import com.vitorpamplona.amethyst.ui.components.imageExtension
-import com.vitorpamplona.amethyst.ui.components.isValidURL
-import com.vitorpamplona.amethyst.ui.components.noProtocolUrlValidator
-import com.vitorpamplona.amethyst.ui.components.videoExtension
+import com.vitorpamplona.amethyst.ui.components.*
 import com.vitorpamplona.amethyst.ui.navigation.UploadFromGallery
 import com.vitorpamplona.amethyst.ui.note.ReplyInformation
-import com.vitorpamplona.amethyst.ui.screen.UserLine
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.UserLine
 import kotlinx.coroutines.delay
 import nostr.postr.events.TextNoteEvent
 
 
 @OptIn(ExperimentalComposeUiApi::class)
 @Composable
-fun NewPostView(onClose: () -> Unit, baseReplyTo: Note? = null, account: Account) {
+fun NewPostView(onClose: () -> Unit, baseReplyTo: Note? = null, quote: Note? = null, account: Account) {
     val postViewModel: NewPostViewModel = viewModel()
 
-    postViewModel.load(account, baseReplyTo)
-
     val context = LocalContext.current
 
     // initialize focus reference to be able to request focus programmatically
     val focusRequester = remember { FocusRequester() }
     val keyboardController = LocalSoftwareKeyboardController.current
 
+    val scroolState = rememberScrollState()
+
     LaunchedEffect(Unit) {
+        postViewModel.load(account, baseReplyTo, quote)
         delay(100)
         focusRequester.requestFocus()
+
+        postViewModel.imageUploadingError.collect { error ->
+            Toast.makeText(context, error, Toast.LENGTH_SHORT).show()
+        }
     }
 
     Dialog(
         onDismissRequest = { onClose() },
         properties = DialogProperties(
             usePlatformDefaultWidth = false,
-            dismissOnClickOutside = false
+            dismissOnClickOutside = false,
+            decorFitsSystemWindows = false
         )
     ) {
-        Surface(
-            modifier = Modifier
-                .fillMaxWidth()
-                .fillMaxHeight()
-        ) {
-            Column(
-                modifier = Modifier.padding(10.dp)
-            ) {
-                Row(
-                    modifier = Modifier
-                        .fillMaxWidth(),
-                    horizontalArrangement = Arrangement.SpaceBetween,
-                    verticalAlignment = Alignment.CenterVertically
-                ) {
-                    CloseButton(onCancel = {
-                        postViewModel.cancel()
-                        onClose()
-                    })
-
-                    UploadFromGallery {
-                        postViewModel.upload(it, context)
-                    }
-
-                    PostButton(
-                        onPost = {
-                            postViewModel.sendPost()
-                            onClose()
-                        },
-                        postViewModel.message.text.isNotBlank()
-                    )
-                }
-
-                if (postViewModel.replyTos != null && baseReplyTo?.event is TextNoteEvent) {
-                    ReplyInformation(postViewModel.replyTos, postViewModel.mentions, "✖ ") {
-                        postViewModel.removeFromReplyList(it)
-                    }
-                }
-
-                OutlinedTextField(
-                    value = postViewModel.message,
-                    onValueChange = {
-                        postViewModel.updateMessage(it)
-                    },
-                    keyboardOptions = KeyboardOptions.Default.copy(
-                        capitalization = KeyboardCapitalization.Sentences
-                    ),
-                    modifier = Modifier
-                        .fillMaxWidth()
-                        .border(
-                            width = 1.dp,
-                            color = MaterialTheme.colors.surface,
-                            shape = RoundedCornerShape(8.dp)
-                        )
-                        .focusRequester(focusRequester)
-                        .onFocusChanged {
-                            if (it.isFocused) {
-                                keyboardController?.show()
-                            }
-                        },
-                    placeholder = {
-                        Text(
-                            text = "What's on your mind?",
-                            color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
-                        )
-                    },
-                    colors = TextFieldDefaults
-                        .outlinedTextFieldColors(
-                            unfocusedBorderColor = Color.Transparent,
-                            focusedBorderColor = Color.Transparent
-                        ),
-                    visualTransformation = UrlUserTagTransformation(MaterialTheme.colors.primary),
-                    textStyle = LocalTextStyle.current.copy(textDirection = TextDirection.Content)
-                )
-
-                val userSuggestions = postViewModel.userSuggestions
-                if (userSuggestions.isNotEmpty()) {
-                    LazyColumn(
-                        contentPadding = PaddingValues(
-                            top = 10.dp,
-                            bottom = 10.dp
-                        )
+        Surface(modifier = Modifier.fillMaxWidth().fillMaxHeight()) {
+            Column(modifier = Modifier.fillMaxWidth().fillMaxHeight()) {
+                Column(modifier = Modifier.padding(10.dp).imePadding().weight(1f)) {
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.SpaceBetween,
+                        verticalAlignment = Alignment.CenterVertically
                     ) {
-                        itemsIndexed(userSuggestions, key = { _, item -> item.pubkeyHex }) { index, item ->
-                            UserLine(item, account) {
-                                postViewModel.autocompleteWithUser(item)
+                        CloseButton(onCancel = {
+                            postViewModel.cancel()
+                            onClose()
+                        })
+
+                        UploadFromGallery(
+                            isUploading = postViewModel.isUploadingImage,
+                        ) {
+                            postViewModel.upload(it, context)
+                        }
+
+                        PostButton(
+                            onPost = {
+                                postViewModel.sendPost()
+                                onClose()
+                            },
+                            isActive = postViewModel.message.text.isNotBlank()
+                              && !postViewModel.isUploadingImage
+                        )
+                    }
+
+                    Row(
+                        modifier = Modifier.fillMaxWidth().weight(1f)
+                    ) {
+                        Column(modifier = Modifier.fillMaxWidth().verticalScroll(scroolState)) {
+                            if (postViewModel.replyTos != null && baseReplyTo?.event is TextNoteEvent) {
+                                ReplyInformation(postViewModel.replyTos, postViewModel.mentions, account, "✖ ") {
+                                    postViewModel.removeFromReplyList(it)
+                                }
+                            }
+
+                            OutlinedTextField(
+                                value = postViewModel.message,
+                                onValueChange = {
+                                    postViewModel.updateMessage(it)
+                                },
+                                keyboardOptions = KeyboardOptions.Default.copy(
+                                    capitalization = KeyboardCapitalization.Sentences
+                                ),
+                                modifier = Modifier
+                                    .fillMaxWidth()
+                                    .border(
+                                        width = 1.dp,
+                                        color = MaterialTheme.colors.surface,
+                                        shape = RoundedCornerShape(8.dp)
+                                    )
+                                    .focusRequester(focusRequester)
+                                    .onFocusChanged {
+                                        if (it.isFocused) {
+                                            keyboardController?.show()
+                                        }
+                                    },
+                                placeholder = {
+                                    Text(
+                                        text = "What's on your mind?",
+                                        color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
+                                    )
+                                },
+                                colors = TextFieldDefaults
+                                    .outlinedTextFieldColors(
+                                        unfocusedBorderColor = Color.Transparent,
+                                        focusedBorderColor = Color.Transparent
+                                    ),
+                                visualTransformation = UrlUserTagTransformation(MaterialTheme.colors.primary),
+                                textStyle = LocalTextStyle.current.copy(textDirection = TextDirection.Content)
+                            )
+
+                            val myUrlPreview = postViewModel.urlPreview
+                            if (myUrlPreview != null) {
+                                Row(modifier = Modifier.padding(top = 5.dp)) {
+                                    if (isValidURL(myUrlPreview)) {
+                                        val removedParamsFromUrl =
+                                            myUrlPreview.split("?")[0].toLowerCase()
+                                        if (imageExtension.matcher(removedParamsFromUrl).matches()) {
+                                            AsyncImage(
+                                                model = myUrlPreview,
+                                                contentDescription = myUrlPreview,
+                                                contentScale = ContentScale.FillWidth,
+                                                modifier = Modifier
+                                                    .padding(top = 4.dp)
+                                                    .fillMaxWidth()
+                                                    .clip(shape = RoundedCornerShape(15.dp))
+                                                    .border(
+                                                        1.dp,
+                                                        MaterialTheme.colors.onSurface.copy(alpha = 0.12f),
+                                                        RoundedCornerShape(15.dp)
+                                                    )
+                                            )
+                                        } else if (videoExtension.matcher(removedParamsFromUrl)
+                                                .matches()
+                                        ) {
+                                            VideoView(myUrlPreview)
+                                        } else {
+                                            UrlPreview(myUrlPreview, myUrlPreview)
+                                        }
+                                    } else if (noProtocolUrlValidator.matcher(myUrlPreview).matches()) {
+                                        UrlPreview("https://$myUrlPreview", myUrlPreview)
+                                    }
+                                }
                             }
                         }
-                    }
-                }
 
-                val myUrlPreview = postViewModel.urlPreview
-                if (myUrlPreview != null) {
-                    Column(modifier = Modifier.padding(top = 5.dp)) {
-                        if (isValidURL(myUrlPreview)) {
-                            val removedParamsFromUrl = myUrlPreview.split("?")[0].toLowerCase()
-                            if (imageExtension.matcher(removedParamsFromUrl).matches()) {
-                                AsyncImage(
-                                    model = myUrlPreview,
-                                    contentDescription = myUrlPreview,
-                                    contentScale = ContentScale.FillWidth,
-                                    modifier = Modifier
-                                        .padding(top = 4.dp)
-                                        .fillMaxWidth()
-                                        .clip(shape = RoundedCornerShape(15.dp))
-                                        .border(
-                                            1.dp,
-                                            MaterialTheme.colors.onSurface.copy(alpha = 0.12f),
-                                            RoundedCornerShape(15.dp)
-                                        )
-                                )
-                            } else if (videoExtension.matcher(removedParamsFromUrl).matches()) {
-                                VideoView(myUrlPreview)
-                            } else {
-                                UrlPreview(myUrlPreview, myUrlPreview)
+                    }
+
+                    val userSuggestions = postViewModel.userSuggestions
+                    if (userSuggestions.isNotEmpty()) {
+                        LazyColumn(
+                            contentPadding = PaddingValues(
+                                top = 10.dp
+                            ),
+                            modifier = Modifier.heightIn(0.dp, 300.dp)
+                        ) {
+                            itemsIndexed(
+                                userSuggestions,
+                                key = { _, item -> item.pubkeyHex }) { index, item ->
+                                UserLine(item, account) {
+                                    postViewModel.autocompleteWithUser(item)
+                                }
                             }
-                        } else if (noProtocolUrlValidator.matcher(myUrlPreview).matches()) {
-                            UrlPreview("https://$myUrlPreview", myUrlPreview)
                         }
                     }
                 }
@@ -247,6 +244,25 @@ fun PostButton(onPost: () -> Unit = {}, isActive: Boolean, modifier: Modifier =
     }
 }
 
+@Composable
+fun SaveButton(onPost: () -> Unit = {}, isActive: Boolean, modifier: Modifier = Modifier) {
+    Button(
+        modifier = modifier,
+        onClick = {
+            if (isActive) {
+                onPost()
+            }
+        },
+        shape = RoundedCornerShape(20.dp),
+        colors = ButtonDefaults
+            .buttonColors(
+                backgroundColor = if (isActive) MaterialTheme.colors.primary else Color.Gray
+            )
+    ) {
+        Text(text = "Save", color = Color.White)
+    }
+}
+
 @Composable
 fun CreateButton(onPost: () -> Unit = {}, isActive: Boolean, modifier: Modifier = Modifier) {
     Button(

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

@@ -1,25 +1,23 @@
 package com.vitorpamplona.amethyst.ui.actions
 
 import android.content.Context
-import android.graphics.ImageDecoder
 import android.net.Uri
-import android.os.Build
-import android.provider.MediaStore
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.text.TextRange
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
-import com.vitorpamplona.amethyst.model.decodePublicKey
-import com.vitorpamplona.amethyst.model.toHexKey
+import com.vitorpamplona.amethyst.model.parseDirtyWordForKey
 import com.vitorpamplona.amethyst.ui.components.isValidURL
 import com.vitorpamplona.amethyst.ui.components.noProtocolUrlValidator
-import nostr.postr.toNpub
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.launch
 
 class NewPostViewModel: ViewModel() {
     private var account: Account? = null
@@ -30,11 +28,13 @@ class NewPostViewModel: ViewModel() {
 
     var message by mutableStateOf(TextFieldValue(""))
     var urlPreview by mutableStateOf<String?>(null)
+    var isUploadingImage by mutableStateOf(false)
+    val imageUploadingError = MutableSharedFlow<String?>()
 
     var userSuggestions by mutableStateOf<List<User>>(emptyList())
     var userSuggestionAnchor: TextRange? = null
 
-    fun load(account: Account, replyingTo: Note?) {
+    fun load(account: Account, replyingTo: Note?, quote: Note?) {
         originalNote = replyingTo
         replyingTo?.let { replyNote ->
             this.replyTos = (replyNote.replyTo ?: emptyList()).plus(replyNote)
@@ -48,49 +48,60 @@ class NewPostViewModel: ViewModel() {
 
             }
         }
+
+        quote?.let {
+            message = TextFieldValue(message.text + "\n\n@${it.idNote()}")
+        }
+
         this.account = account
     }
 
-    fun addUserToMentionsIfNotInAndReturnIndex(user: User): Int {
-        val replyToSize = replyTos?.size ?: 0
+    fun addUserToMentions(user: User) {
+        mentions = if (mentions?.contains(user) == true) mentions else mentions?.plus(user) ?: listOf(user)
+    }
 
-        var myMentions = mentions
-        if (myMentions == null) {
-            mentions = listOf(user)
-            return replyToSize + 0 // position of the user
-        }
+    fun addNoteToReplyTos(note: Note) {
+        note.author?.let { addUserToMentions(it) }
+        replyTos = if (replyTos?.contains(note) == true) replyTos else replyTos?.plus(note) ?: listOf(note)
+    }
 
-        val index = myMentions.indexOf(user)
+    fun tagIndex(user: User): Int {
+        // Postr Events assembles replies before mentions in the tag order
+        return (if (originalNote?.channel != null) 1 else 0) + (replyTos?.size ?: 0) + (mentions?.indexOf(user) ?: 0)
+    }
 
-        if (index >= 0) return replyToSize + index
-
-        myMentions = myMentions.plus(user)
-        mentions = myMentions
-        return replyToSize + myMentions.indexOf(user)
+    fun tagIndex(note: Note): Int {
+        // Postr Events assembles replies before mentions in the tag order
+        return (if (originalNote?.channel != null) 1 else 0) + (replyTos?.indexOf(note) ?: 0)
     }
 
     fun sendPost() {
-        // Moves @npub to mentions
+        // adds all references to mentions and reply tos
+        message.text.split('\n').forEach { paragraph: String ->
+            paragraph.split(' ').forEach { word: String ->
+                val results = parseDirtyWordForKey(word)
+
+                if (results?.type == "npub") {
+                    addUserToMentions(LocalCache.getOrCreateUser(results.keyHex))
+                } else if (results?.type == "note") {
+                    addNoteToReplyTos(LocalCache.getOrCreateNote(results.keyHex))
+                }
+            }
+        }
+
+        // Tags the text in the correct order.
         val newMessage = message.text.split('\n').map { paragraph: String ->
             paragraph.split(' ').map { word: String ->
-                try {
-                    if (word.startsWith("@npub") && word.length >= 64) {
-                        val keyB32 = word.substring(0, 64)
-                        val restOfWord = word.substring(64)
+                val results = parseDirtyWordForKey(word)
+                if (results?.type == "npub") {
+                    val user = LocalCache.getOrCreateUser(results.keyHex)
 
-                        val key = decodePublicKey(keyB32.removePrefix("@"))
-                        val user = LocalCache.getOrCreateUser(key.toHexKey())
+                    "#[${tagIndex(user)}]${results.restOfWord}"
+                } else if (results?.type == "note") {
+                    val note = LocalCache.getOrCreateNote(results.keyHex)
 
-                        val index = addUserToMentionsIfNotInAndReturnIndex(user)
-
-                        val newWord = "#[${index}]"
-
-                        newWord + restOfWord
-                    } else {
-                        word
-                    }
-                } catch (e: Exception) {
-                    // if it can't parse the key, don't try to change.
+                    "#[${tagIndex(note)}]${results.restOfWord}"
+                } else {
                     word
                 }
             }.joinToString(" ")
@@ -104,26 +115,35 @@ class NewPostViewModel: ViewModel() {
 
         message = TextFieldValue("")
         urlPreview = null
+        isUploadingImage = false
+        mentions = null
     }
 
     fun upload(it: Uri, context: Context) {
-        val img = if (Build.VERSION.SDK_INT < 28) {
-            MediaStore.Images.Media.getBitmap(context.contentResolver, it)
-        } else {
-            ImageDecoder.decodeBitmap(ImageDecoder.createSource(context.contentResolver, it))
-        }
+        isUploadingImage = true
 
-        img?.let {
-            ImageUploader.uploadImage(img) {
-                message = TextFieldValue(message.text + "\n\n" + it)
+        ImageUploader.uploadImage(
+            uri = it,
+            contentResolver = context.contentResolver,
+            onSuccess = { imageUrl ->
+                isUploadingImage = false
+                message = TextFieldValue(message.text + "\n\n" + imageUrl)
                 urlPreview = findUrlInMessage()
+            },
+            onError = {
+                isUploadingImage = false
+                viewModelScope.launch {
+                    imageUploadingError.emit("Failed to upload the image")
+                }
             }
-        }
+        )
     }
 
     fun cancel() {
         message = TextFieldValue("")
         urlPreview = null
+        isUploadingImage = false
+        mentions = null
     }
 
     fun findUrlInMessage(): String? {
@@ -157,7 +177,7 @@ class NewPostViewModel: ViewModel() {
         userSuggestionAnchor?.let {
             val lastWord = message.text.substring(0, it.end).substringAfterLast("\n").substringAfterLast(" ")
             val lastWordStart = it.end - lastWord.length
-            val wordToInsert = "@${item.pubkey.toNpub()} "
+            val wordToInsert = "@${item.pubkeyNpub()} "
 
             message = TextFieldValue(
                 message.text.replaceRange(lastWordStart, it.end, wordToInsert),

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

@@ -23,6 +23,7 @@ import androidx.compose.material.Surface
 import androidx.compose.material.Text
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Cancel
+import androidx.compose.material.icons.filled.DeleteSweep
 import androidx.compose.material.icons.filled.Download
 import androidx.compose.material.icons.filled.Groups
 import androidx.compose.material.icons.filled.Public
@@ -148,7 +149,7 @@ fun ServerConfigHeader() {
                 }
             }
 
-            Column(Modifier.weight(1f)) {
+            Column(Modifier.weight(1.4f)) {
                 Row(verticalAlignment = Alignment.CenterVertically) {
                     Spacer(modifier = Modifier.size(25.dp))
 
@@ -181,6 +182,16 @@ fun ServerConfigHeader() {
                     )
 
                     Spacer(modifier = Modifier.size(5.dp))
+
+                    Text(
+                        text = "Spam",
+                        maxLines = 1,
+                        fontSize = 14.sp,
+                        modifier = Modifier.weight(1f),
+                        color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+                    )
+
+                    Spacer(modifier = Modifier.size(2.dp))
                 }
             }
         }
@@ -290,7 +301,7 @@ fun ServerConfig(
                         }
                     }
 
-                    Column(Modifier.weight(1f)) {
+                    Column(Modifier.weight(1.4f)) {
                         Row(verticalAlignment = Alignment.CenterVertically) {
                             IconButton(
                                 modifier = Modifier.size(30.dp),
@@ -350,6 +361,21 @@ fun ServerConfig(
                                 modifier = Modifier.weight(1f),
                                 color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
                             )
+
+                            Icon(
+                                imageVector = Icons.Default.DeleteSweep,
+                                null,
+                                modifier = Modifier.padding(horizontal = 5.dp).size(15.dp),
+                                tint = if (item.spamCount > 0) Color.Yellow else Color.Green
+                            )
+
+                            Text(
+                                text = "${countToHumanReadable(item.spamCount)}",
+                                maxLines = 1,
+                                fontSize = 14.sp,
+                                modifier = Modifier.weight(1f),
+                                color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+                            )
                         }
                     }
                 }

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

@@ -2,7 +2,6 @@ package com.vitorpamplona.amethyst.ui.actions
 
 import android.content.Context
 import androidx.lifecycle.ViewModel
-import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.RelaySetupInfo
 import com.vitorpamplona.amethyst.service.relays.FeedType
@@ -25,7 +24,6 @@ class NewRelayListViewModel: ViewModel() {
     fun create(ctx: Context) {
         relays.let {
             account.saveRelayList(it.value)
-            LocalPreferences(ctx).saveToEncryptedStorage(account)
         }
 
         clear(ctx)
@@ -43,8 +41,9 @@ class NewRelayListViewModel: ViewModel() {
                     val errorCounter = liveRelay?.errorCounter ?: 0
                     val eventDownloadCounter = liveRelay?.eventDownloadCounter ?: 0
                     val eventUploadCounter = liveRelay?.eventUploadCounter ?: 0
+                    val spamCounter = liveRelay?.spamCounter ?: 0
 
-                    RelaySetupInfo(it.key, it.value.read, it.value.write, errorCounter, eventDownloadCounter, eventUploadCounter, localInfoFeedTypes)
+                    RelaySetupInfo(it.key, it.value.read, it.value.write, errorCounter, eventDownloadCounter, eventUploadCounter, spamCounter, localInfoFeedTypes)
                 }.sortedBy { it.downloadCount }.reversed()
             else
                 account.localRelays.map {
@@ -53,8 +52,9 @@ class NewRelayListViewModel: ViewModel() {
                     val errorCounter = liveRelay?.errorCounter ?: 0
                     val eventDownloadCounter = liveRelay?.eventDownloadCounter ?: 0
                     val eventUploadCounter = liveRelay?.eventUploadCounter ?: 0
+                    val spamCounter = liveRelay?.spamCounter ?: 0
 
-                    RelaySetupInfo(it.url, it.read, it.write, errorCounter, eventDownloadCounter, eventUploadCounter, it.feedTypes)
+                    RelaySetupInfo(it.url, it.read, it.write, errorCounter, eventDownloadCounter, eventUploadCounter, spamCounter, it.feedTypes)
                 }.sortedBy { it.downloadCount }.reversed()
         }
     }

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

@@ -23,9 +23,6 @@ import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.model.Account
-import com.vitorpamplona.amethyst.model.Channel
-import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
-import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @OptIn(ExperimentalComposeUiApi::class)
 @Composable
@@ -64,7 +61,7 @@ fun NewUserMetadataView(onClose: () -> Unit, account: Account) {
                             postViewModel.create()
                             onClose()
                         },
-                        postViewModel.userName.value.isNotBlank()
+                        true
                     )
                 }
 

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

@@ -29,19 +29,19 @@ class NewUserMetadataViewModel: ViewModel() {
         account.userProfile().let {
             userName.value = it.bestUsername() ?: ""
             displayName.value = it.bestDisplayName() ?: ""
-            about.value = it.info.about ?: ""
-            picture.value = it.info.picture ?: ""
-            banner.value = it.info.banner ?: ""
-            website.value = it.info.website ?: ""
-            nip05.value = it.info.nip05 ?: ""
-            lnAddress.value = it.info.lud16 ?: ""
-            lnURL.value = it.info.lud06 ?: ""
+            about.value = it.info?.about ?: ""
+            picture.value = it.info?.picture ?: ""
+            banner.value = it.info?.banner ?: ""
+            website.value = it.info?.website ?: ""
+            nip05.value = it.info?.nip05 ?: ""
+            lnAddress.value = it.info?.lud16 ?: ""
+            lnURL.value = it.info?.lud06 ?: ""
         }
     }
 
     fun create() {
         // Tries to not delete any existing attribute that we do not work with.
-        val latest = account.userProfile().latestMetadata
+        val latest = account.userProfile().info?.latestMetadata
         val currentJson = if (latest != null) {
             ObjectMapper().readTree(
                 ByteArrayInputStream(latest.content.toByteArray(Charsets.UTF_8))
@@ -49,17 +49,17 @@ class NewUserMetadataViewModel: ViewModel() {
         } else {
             ObjectMapper().createObjectNode()
         }
-        currentJson.put("name", userName.value)
-        currentJson.put("username", userName.value)
-        currentJson.put("display_name", displayName.value)
-        currentJson.put("displayName", displayName.value)
-        currentJson.put("picture", picture.value)
-        currentJson.put("banner", banner.value)
-        currentJson.put("website", website.value)
-        currentJson.put("about", about.value)
-        currentJson.put("nip05", nip05.value)
-        currentJson.put("lud16", lnAddress.value)
-        currentJson.put("lud06", lnURL.value)
+        currentJson.put("name", userName.value.trim())
+        currentJson.put("username", userName.value.trim())
+        currentJson.put("display_name", displayName.value.trim())
+        currentJson.put("displayName", displayName.value.trim())
+        currentJson.put("picture", picture.value.trim())
+        currentJson.put("banner", banner.value.trim())
+        currentJson.put("website", website.value.trim())
+        currentJson.put("about", about.value.trim())
+        currentJson.put("nip05", nip05.value.trim())
+        currentJson.put("lud16", lnAddress.value.trim())
+        currentJson.put("lud06", lnURL.value.trim())
 
         val writer = StringWriter()
         ObjectMapper().writeValue(writer, currentJson)

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

@@ -9,12 +9,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material.Button
 import androidx.compose.material.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.SideEffect
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
+import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
@@ -24,7 +19,10 @@ import com.google.accompanist.permissions.rememberPermissionState
 
 @OptIn(ExperimentalPermissionsApi::class)
 @Composable
-fun UploadFromGallery(onImageChosen: (Uri) -> Unit) {
+fun UploadFromGallery(
+    isUploading: Boolean,
+    onImageChosen: (Uri) -> Unit,
+) {
     val cameraPermissionState =
         rememberPermissionState(
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
@@ -50,18 +48,30 @@ fun UploadFromGallery(onImageChosen: (Uri) -> Unit) {
                     modifier = Modifier
                         .align(Alignment.TopCenter)
                         .padding(4.dp),
+                    enabled = !isUploading,
                     onClick = {
                         showGallerySelect = true
                     }
                 ) {
-                    Text("Upload Image")
+                    if (!isUploading) {
+                        Text("Upload Image")
+                    } else {
+                        Text("Uploading…")
+                    }
                 }
             }
         }
     } else {
         Column {
-            Button(onClick = { cameraPermissionState.launchPermissionRequest() }) {
-                Text("Upload Image")
+            Button(
+                onClick = { cameraPermissionState.launchPermissionRequest() },
+                enabled = !isUploading,
+            ) {
+                if (!isUploading) {
+                    Text("Upload Image")
+                } else {
+                    Text("Uploading…")
+                }
             }
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/ui/buttons/NewChannelButton.kt

@@ -9,8 +9,6 @@ import androidx.compose.material.MaterialTheme
 import androidx.compose.material.OutlinedButton
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Add
-import androidx.compose.material.icons.outlined.Visibility
-import androidx.compose.material.icons.outlined.VisibilityOff
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -18,14 +16,9 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
-import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.ui.actions.NewChannelView
-import com.vitorpamplona.amethyst.ui.actions.NewPostView
-import com.vitorpamplona.amethyst.ui.screen.AccountStateViewModel
-import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
 fun NewChannelButton(account: Account) {

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

@@ -0,0 +1,80 @@
+package com.vitorpamplona.amethyst.ui.components
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.ColorFilter
+import androidx.compose.ui.graphics.DefaultAlpha
+import androidx.compose.ui.graphics.FilterQuality
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.graphics.painter.Painter
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.unit.Dp
+import coil.compose.AsyncImage
+import coil.compose.AsyncImagePainter
+import coil.compose.LocalImageLoader
+import java.util.Base64
+
+data class ResizeImage(val url: String?, val size: Dp)
+
+
+@Composable
+fun AsyncImageProxy(
+  model: ResizeImage,
+  contentDescription: String?,
+  modifier: Modifier = Modifier,
+  placeholder: Painter? = null,
+  error: Painter? = null,
+  fallback: Painter? = error,
+  onLoading: ((AsyncImagePainter.State.Loading) -> Unit)? = null,
+  onSuccess: ((AsyncImagePainter.State.Success) -> Unit)? = null,
+  onError: ((AsyncImagePainter.State.Error) -> Unit)? = null,
+  alignment: Alignment = Alignment.Center,
+  contentScale: ContentScale = ContentScale.Fit,
+  alpha: Float = DefaultAlpha,
+  colorFilter: ColorFilter? = null,
+  filterQuality: FilterQuality = DrawScope.DefaultFilterQuality,
+) {
+  if (model.url == null) {
+    AsyncImage(
+      model = model.url,
+      contentDescription = contentDescription,
+      imageLoader = LocalImageLoader.current,
+      modifier = modifier,
+      placeholder = placeholder,
+      error = error,
+      fallback = fallback,
+      onLoading = onLoading,
+      onSuccess = onSuccess,
+      onError = onError,
+      alignment = alignment,
+      contentScale = contentScale,
+      alpha = alpha,
+      colorFilter = colorFilter,
+      filterQuality = filterQuality
+    )
+  } else {
+    val imgPx = with(LocalDensity.current) { model.size.toPx().toInt() }
+    val base64 = Base64.getUrlEncoder().encodeToString(model.url.toByteArray())
+    val extension = model.url.split(".").lastOrNull()
+
+    AsyncImage(
+      model = "https://d12fidohs5rlxk.cloudfront.net/preset:sharp/rs:fit:$imgPx:$imgPx:0/gravity:sm/$base64",
+      contentDescription = contentDescription,
+      imageLoader = LocalImageLoader.current,
+      modifier = modifier,
+      placeholder = placeholder,
+      error = error,
+      fallback = fallback,
+      onLoading = onLoading,
+      onSuccess = onSuccess,
+      onError = onError,
+      alignment = alignment,
+      contentScale = contentScale,
+      alpha = alpha,
+      colorFilter = colorFilter,
+      filterQuality = filterQuality
+    )
+  }
+}

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

@@ -8,7 +8,6 @@ import androidx.compose.material.LocalTextStyle
 import androidx.compose.material.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.text.AnnotatedString
 
 @Composable

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

@@ -4,12 +4,9 @@ import androidx.compose.foundation.text.ClickableText
 import androidx.compose.material.LocalTextStyle
 import androidx.compose.material.MaterialTheme
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.text.AnnotatedString
 import androidx.navigation.NavController
 import com.vitorpamplona.amethyst.model.Note
-import com.vitorpamplona.amethyst.model.toNote
 import com.vitorpamplona.amethyst.ui.note.toShortenHex
 
 @Composable
@@ -18,7 +15,7 @@ fun ClickableNoteTag(
   navController: NavController
 ) {
   ClickableText(
-    text = AnnotatedString("@${baesNote.id.toNote().toShortenHex()} "),
+    text = AnnotatedString("@${baesNote.idNote().toShortenHex()} "),
     onClick = { navController.navigate("Note/${baesNote.idHex}") },
     style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary)
   )

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

@@ -1,6 +1,5 @@
 package com.vitorpamplona.amethyst.ui.components
 
-import android.content.ActivityNotFoundException
 import android.content.Context
 import android.content.Intent
 import android.net.Uri
@@ -9,7 +8,6 @@ import androidx.compose.material.LocalTextStyle
 import androidx.compose.material.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.text.AnnotatedString
 
 @Composable

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

@@ -9,13 +9,8 @@ import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.text.AnnotatedString
 import androidx.navigation.NavController
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.User
-import com.vitorpamplona.amethyst.model.toByteArray
-import com.vitorpamplona.amethyst.model.toNote
 import com.vitorpamplona.amethyst.service.Nip19
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
-import com.vitorpamplona.amethyst.ui.note.toShortenHex
-import nostr.postr.toNpub
 
 @Composable
 fun ClickableRoute(
@@ -25,7 +20,7 @@ fun ClickableRoute(
   if (nip19.type == Nip19.Type.USER) {
     val userBase = LocalCache.getOrCreateUser(nip19.hex)
 
-    val userState by userBase.liveMetadata.observeAsState()
+    val userState by userBase.live().metadata.observeAsState()
     val user = userState?.user ?: return
 
     val route = "User/${nip19.hex}"
@@ -38,12 +33,12 @@ fun ClickableRoute(
     )
   } else {
     val noteBase = LocalCache.getOrCreateNote(nip19.hex)
-    val noteState by noteBase.live.observeAsState()
+    val noteState by noteBase.live().metadata.observeAsState()
     val note = noteState?.note ?: return
 
     if (note.event is ChannelCreateEvent) {
       ClickableText(
-        text = AnnotatedString("@${note.idDisplayNote} "),
+        text = AnnotatedString("@${note.idDisplayNote()} "),
         onClick = { navController.navigate("Channel/${nip19.hex}") },
         style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary)
       )
@@ -55,7 +50,7 @@ fun ClickableRoute(
       )
     } else {
       ClickableText(
-        text = AnnotatedString("@${note.idDisplayNote} "),
+        text = AnnotatedString("@${note.idDisplayNote()} "),
         onClick = { navController.navigate("Note/${nip19.hex}") },
         style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary)
       )

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

@@ -15,7 +15,7 @@ fun ClickableUserTag(
   user: User,
   navController: NavController
 ) {
-  val innerUserState by user.liveMetadata.observeAsState()
+  val innerUserState by user.live().metadata.observeAsState()
   ClickableText(
     text = AnnotatedString("@${innerUserState?.user?.toBestDisplayName()} "),
     onClick = { navController.navigate("User/${innerUserState?.user?.pubkeyHex}") },

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

@@ -21,14 +21,19 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Brush
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.compositeOver
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 
 @Composable
 fun ExpandableRichTextViewer(
   content: String,
   canPreview: Boolean,
+  modifier: Modifier = Modifier,
   tags: List<List<String>>?,
+  backgroundColor: Color,
+  accountViewModel: AccountViewModel,
   navController: NavController
 ) {
   var showFullText by remember { mutableStateOf(false) }
@@ -36,7 +41,7 @@ fun ExpandableRichTextViewer(
   val text = if (showFullText) content else content.take(350)
 
   Box(contentAlignment = Alignment.BottomCenter) {
-    RichTextViewer(text, canPreview, tags, navController)
+    RichTextViewer(text, canPreview, modifier, tags, backgroundColor, accountViewModel, navController)
 
     if (content.length > 350 && !showFullText) {
       Row(
@@ -47,8 +52,8 @@ fun ExpandableRichTextViewer(
           .background(
             brush = Brush.verticalGradient(
               colors = listOf(
-                MaterialTheme.colors.background.copy(alpha = 0f),
-                MaterialTheme.colors.background
+                backgroundColor.copy(alpha = 0f),
+                backgroundColor
               )
             )
           )
@@ -58,7 +63,7 @@ fun ExpandableRichTextViewer(
           onClick = { showFullText = !showFullText },
           shape = RoundedCornerShape(20.dp),
           colors = ButtonDefaults.buttonColors(
-            backgroundColor = MaterialTheme.colors.primary
+            backgroundColor = MaterialTheme.colors.primary.copy(alpha = 0.32f).compositeOver(MaterialTheme.colors.background)
           ),
           contentPadding = PaddingValues(vertical = 6.dp, horizontal = 16.dp)
         ) {

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

@@ -9,20 +9,13 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.Button
 import androidx.compose.material.ButtonDefaults
 import androidx.compose.material.Divider
 import androidx.compose.material.Icon
-import androidx.compose.material.LocalTextStyle
 import androidx.compose.material.MaterialTheme
-import androidx.compose.material.OutlinedTextField
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -30,14 +23,11 @@ import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.text.input.KeyboardCapitalization
-import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.text.style.TextDirection
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.core.content.ContextCompat.startActivity
 import com.vitorpamplona.amethyst.R
-import com.vitorpamplona.amethyst.lnurl.LnInvoiceUtil
+import com.vitorpamplona.amethyst.service.lnurl.LnInvoiceUtil
 import java.text.NumberFormat
 
 @Composable

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

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.ui.components
 
 import android.content.Intent
 import android.net.Uri
+import android.widget.Toast
 import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -21,6 +22,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -35,11 +37,14 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.core.content.ContextCompat.startActivity
 import com.vitorpamplona.amethyst.R
-import com.vitorpamplona.amethyst.lnurl.LightningAddressResolver
+import com.vitorpamplona.amethyst.service.lnurl.LightningAddressResolver
+import com.vitorpamplona.amethyst.model.Account
+import kotlinx.coroutines.launch
 
 @Composable
-fun InvoiceRequest(lud16: String, onClose: () -> Unit ) {
+fun InvoiceRequest(lud16: String, toUserPubKeyHex: String, account: Account, onClose: () -> Unit ) {
   val context = LocalContext.current
+  val scope = rememberCoroutineScope()
 
   Column(modifier = Modifier
     .fillMaxWidth()
@@ -124,13 +129,23 @@ fun InvoiceRequest(lud16: String, onClose: () -> Unit ) {
       Button(
         modifier = Modifier.fillMaxWidth().padding(vertical = 10.dp),
         onClick = {
-          LightningAddressResolver().lnAddressInvoice(lud16, amount * 1000, message) {
-            runCatching {
-              val intent = Intent(Intent.ACTION_VIEW, Uri.parse("lightning:$it"))
-              startActivity(context, intent, null)
+          val zapRequest = account.createZapRequestFor(toUserPubKeyHex)
+
+          LightningAddressResolver().lnAddressInvoice(lud16, amount * 1000, message, zapRequest?.toJson(),
+            onSuccess = {
+              runCatching {
+                val intent = Intent(Intent.ACTION_VIEW, Uri.parse("lightning:$it"))
+                startActivity(context, intent, null)
+              }
+              onClose()
+            },
+            onError = {
+              scope.launch {
+                Toast.makeText(context, it, Toast.LENGTH_SHORT).show()
+                onClose()
+              }
             }
-            onClose()
-          }
+          )
         },
         shape = RoundedCornerShape(15.dp),
         colors = ButtonDefaults.buttonColors(

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

@@ -2,20 +2,29 @@ package com.vitorpamplona.amethyst.ui.components
 
 import android.util.Patterns
 import androidx.compose.animation.animateContentSize
-import androidx.compose.foundation.layout.*
-import androidx.compose.material.*
-import androidx.compose.runtime.*
+import androidx.compose.foundation.border
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.LocalTextStyle
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.compositeOver
 import androidx.compose.ui.text.style.TextDirection
+import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
 import com.google.accompanist.flowlayout.FlowRow
-import com.vitorpamplona.amethyst.lnurl.LnInvoiceUtil
+import com.vitorpamplona.amethyst.service.lnurl.LnInvoiceUtil
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.model.toByteArray
-import com.vitorpamplona.amethyst.model.toNote
 import com.vitorpamplona.amethyst.service.Nip19
-import com.vitorpamplona.amethyst.ui.note.toShortenHex
-import nostr.postr.toNpub
+import com.vitorpamplona.amethyst.ui.note.NoteCompose
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import java.net.MalformedURLException
 import java.net.URISyntaxException
 import java.net.URL
@@ -45,13 +54,13 @@ fun isValidURL(url: String?): Boolean {
 fun RichTextViewer(
   content: String,
   canPreview: Boolean,
+  modifier: Modifier = Modifier,
   tags: List<List<String>>?,
-  navController: NavController
+  backgroundColor: Color,
+  accountViewModel: AccountViewModel,
+  navController: NavController,
 ) {
-  Column(
-    Modifier
-      .fillMaxWidth()
-      .animateContentSize()) {
+  Column(modifier = modifier.animateContentSize()) {
     // FlowRow doesn't work well with paragraphs. So we need to split them
     content.split('\n').forEach { paragraph ->
 
@@ -79,7 +88,7 @@ fun RichTextViewer(
             } else if (noProtocolUrlValidator.matcher(word).matches()) {
               UrlPreview("https://$word", word)
             } else if (tagIndex.matcher(word).matches() && tags != null) {
-              TagLink(word, tags, navController)
+              TagLink(word, tags, canPreview, backgroundColor, accountViewModel, navController)
             } else if (isBechLink(word)) {
               BechLink(word, navController)
             } else {
@@ -98,7 +107,7 @@ fun RichTextViewer(
             } else if (noProtocolUrlValidator.matcher(word).matches()) {
               ClickableUrl(word, "https://$word")
             } else if (tagIndex.matcher(word).matches() && tags != null) {
-              TagLink(word, tags, navController)
+              TagLink(word, tags, canPreview, backgroundColor, accountViewModel, navController)
             } else if (isBechLink(word)) {
               BechLink(word, navController)
             } else {
@@ -152,7 +161,7 @@ fun BechLink(word: String, navController: NavController) {
 
 
 @Composable
-fun TagLink(word: String, tags: List<List<String>>, navController: NavController) {
+fun TagLink(word: String, tags: List<List<String>>, canPreview: Boolean, backgroundColor: Color, accountViewModel: AccountViewModel, navController: NavController) {
   val matcher = tagIndex.matcher(word)
 
   val index = try {
@@ -169,22 +178,48 @@ fun TagLink(word: String, tags: List<List<String>>, navController: NavController
 
   if (index >= 0 && index < tags.size) {
     if (tags[index][0] == "p") {
-      val user = LocalCache.users[tags[index][1]]
-      if (user != null) {
-        ClickableUserTag(user, navController)
+      val baseUser = LocalCache.checkGetOrCreateUser(tags[index][1])
+      if (baseUser != null) {
+        val userState = baseUser.live().metadata.observeAsState()
+        val user = userState.value?.user
+        if (user != null) {
+          ClickableUserTag(user, navController)
+        } else {
+          Text(text = "$word ")
+        }
       } else {
-        Text(text = "${tags[index][1].toByteArray().toNpub().toShortenHex()} ")
+        // if here the tag is not a valid Nostr Hex
+        Text(text = "$word ")
       }
     } else if (tags[index][0] == "e") {
-      val note = LocalCache.notes[tags[index][1]]
+      val note = LocalCache.checkGetOrCreateNote(tags[index][1])
       if (note != null) {
-        ClickableNoteTag(note, navController)
+        if (canPreview) {
+          NoteCompose(
+            baseNote = note,
+            accountViewModel = accountViewModel,
+            modifier = Modifier
+              .padding(0.dp)
+              .fillMaxWidth()
+              .clip(shape = RoundedCornerShape(15.dp))
+              .border(
+                1.dp,
+                MaterialTheme.colors.onSurface.copy(alpha = 0.12f),
+                RoundedCornerShape(15.dp)
+              ),
+            parentBackgroundColor = MaterialTheme.colors.onSurface.copy(alpha = 0.05f)
+              .compositeOver(backgroundColor),
+            isQuotedNote = true,
+            navController = navController
+          )
+        } else {
+          ClickableNoteTag(note, navController)
+        }
       } else {
-        Text(text = "${tags[index][1].toByteArray().toNote().toShortenHex()} ")
+        // if here the tag is not a valid Nostr Hex
+        Text(text = "$word ")
       }
     } else
       Text(text = "$word ")
   }
 }
-
-

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

@@ -3,15 +3,20 @@ package com.vitorpamplona.amethyst.ui.components
 import android.content.res.Resources
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.text.ClickableText
 import androidx.compose.material.Divider
 import androidx.compose.material.DropdownMenu
 import androidx.compose.material.DropdownMenuItem
+import androidx.compose.material.Icon
 import androidx.compose.material.LocalTextStyle
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Check
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
@@ -20,6 +25,7 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.SpanStyle
 import androidx.compose.ui.text.buildAnnotatedString
@@ -32,12 +38,16 @@ import com.vitorpamplona.amethyst.service.lang.LanguageTranslatorService
 import com.vitorpamplona.amethyst.service.lang.ResultOrError
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import java.util.Locale
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 
 @Composable
 fun TranslateableRichTextViewer(
   content: String,
   canPreview: Boolean,
+  modifier: Modifier = Modifier,
   tags: List<List<String>>?,
+  backgroundColor: Color,
   accountViewModel: AccountViewModel,
   navController: NavController
 ) {
@@ -54,14 +64,23 @@ fun TranslateableRichTextViewer(
   val account = accountState?.account ?: return
 
   LaunchedEffect(accountState) {
-    LanguageTranslatorService.autoTranslate(content, account.dontTranslateFrom, account.translateTo)
-      .addOnCompleteListener { task ->
-        if (task.isSuccessful) {
+    withContext(Dispatchers.IO) {
+      LanguageTranslatorService.autoTranslate(
+        content,
+        account.dontTranslateFrom,
+        account.translateTo
+      ).addOnCompleteListener { task ->
+        if (task.isSuccessful && content != task.result.result) {
+          if (task.result.sourceLang != null && task.result.targetLang != null) {
+            val preference = account.preferenceBetween(task.result.sourceLang!!, task.result.targetLang!!)
+            showOriginal = preference == task.result.sourceLang
+          }
           translatedTextState.value = task.result
         } else {
           translatedTextState.value = ResultOrError(content, null, null, null)
         }
       }
+    }
   }
 
   val toBeViewed = if (showOriginal) content else translatedTextState.value.result ?: content
@@ -70,8 +89,11 @@ fun TranslateableRichTextViewer(
     ExpandableRichTextViewer(
       toBeViewed,
       canPreview,
+      modifier,
       tags,
-      navController
+      backgroundColor,
+      accountViewModel,
+      navController,
     )
 
     val target = translatedTextState.value.targetLang
@@ -79,7 +101,9 @@ fun TranslateableRichTextViewer(
 
     if (source != null && target != null) {
       if (source != target) {
-        Row(modifier = Modifier.fillMaxWidth().padding(top = 5.dp)) {
+        Row(modifier = Modifier
+          .fillMaxWidth()
+          .padding(top = 5.dp)) {
           val clickableTextStyle =
             SpanStyle(color = MaterialTheme.colors.primary.copy(alpha = 0.52f))
 
@@ -128,9 +152,56 @@ fun TranslateableRichTextViewer(
               accountViewModel.dontTranslateFrom(source, context)
               langSettingsPopupExpanded = false
             }) {
+              if (source in account.dontTranslateFrom)
+                Icon(
+                  imageVector = Icons.Default.Check,
+                  contentDescription = null,
+                  modifier = Modifier.size(24.dp)
+                )
+              else
+                Spacer(modifier = Modifier.size(24.dp))
+
+              Spacer(modifier = Modifier.size(10.dp))
+
               Text("Never translate from ${Locale(source).displayName}")
             }
             Divider()
+            DropdownMenuItem(onClick = {
+              accountViewModel.prefer(source, target, source)
+              langSettingsPopupExpanded = false
+            }) {
+              if (account.preferenceBetween(source, target) == source)
+                Icon(
+                  imageVector = Icons.Default.Check,
+                  contentDescription = null,
+                  modifier = Modifier.size(24.dp)
+                )
+              else
+                Spacer(modifier = Modifier.size(24.dp))
+
+              Spacer(modifier = Modifier.size(10.dp))
+
+              Text("Show in ${Locale(source).displayName} first")
+            }
+            DropdownMenuItem(onClick = {
+              accountViewModel.prefer(source, target, target)
+              langSettingsPopupExpanded = false
+            }) {
+              if (account.preferenceBetween(source, target) == target)
+                Icon(
+                  imageVector = Icons.Default.Check,
+                  contentDescription = null,
+                  modifier = Modifier.size(24.dp)
+                )
+              else
+                Spacer(modifier = Modifier.size(24.dp))
+
+              Spacer(modifier = Modifier.size(10.dp))
+
+              Text("Show in ${Locale(target).displayName} first")
+            }
+            Divider()
+
             val languageList =
               ConfigurationCompat.getLocales(Resources.getSystem().getConfiguration())
             for (i in 0 until languageList.size()) {
@@ -139,6 +210,17 @@ fun TranslateableRichTextViewer(
                   accountViewModel.translateTo(lang, context)
                   langSettingsPopupExpanded = false
                 }) {
+                  if (lang.language in account.translateTo)
+                    Icon(
+                      imageVector = Icons.Default.Check,
+                      contentDescription = null,
+                      modifier = Modifier.size(24.dp)
+                    )
+                  else
+                    Spacer(modifier = Modifier.size(24.dp))
+
+                  Spacer(modifier = Modifier.size(10.dp))
+                  
                   Text("Always translate to ${lang.displayName}")
                 }
               }

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

@@ -11,6 +11,8 @@ import androidx.compose.runtime.setValue
 import com.baha.url.preview.IUrlPreviewCallback
 import com.baha.url.preview.UrlInfoItem
 import com.vitorpamplona.amethyst.model.UrlCachedPreviewer
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
 
 
 @Composable
@@ -19,18 +21,20 @@ fun UrlPreview(url: String, urlText: String, showUrlIfError: Boolean = true) {
 
   // Doesn't use a viewModel because of viewModel reusing issues (too many UrlPreview are created).
   LaunchedEffect(url) {
-    UrlCachedPreviewer.previewInfo(url, object : IUrlPreviewCallback {
-      override fun onComplete(urlInfo: UrlInfoItem) {
-        if (urlInfo.allFetchComplete() && urlInfo.url == url)
-          urlPreviewState = UrlPreviewState.Loaded(urlInfo)
-        else
-          urlPreviewState = UrlPreviewState.Empty
-      }
+    withContext(Dispatchers.IO) {
+      UrlCachedPreviewer.previewInfo(url, object : IUrlPreviewCallback {
+        override fun onComplete(urlInfo: UrlInfoItem) {
+          if (urlInfo.allFetchComplete() && urlInfo.url == url)
+            urlPreviewState = UrlPreviewState.Loaded(urlInfo)
+          else
+            urlPreviewState = UrlPreviewState.Empty
+        }
 
-      override fun onFailed(throwable: Throwable) {
-        urlPreviewState = UrlPreviewState.Error("Error parsing preview for ${url}: ${throwable.message}")
-      }
-    })
+        override fun onFailed(throwable: Throwable) {
+          urlPreviewState = UrlPreviewState.Error("Error parsing preview for ${url}: ${throwable.message}")
+        }
+      })
+    }
   }
 
   Crossfade(targetState = urlPreviewState, animationSpec = tween(durationMillis = 100)) { state ->

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

@@ -36,7 +36,7 @@ fun UrlPreviewCard(
     Column {
       AsyncImage(
         model = previewInfo.image,
-        contentDescription = "Profile Image",
+        contentDescription = "Preview Card Image for ${url}",
         contentScale = ContentScale.FillWidth,
         modifier = Modifier.fillMaxWidth()
       )

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

@@ -13,8 +13,10 @@ import com.google.android.exoplayer2.C
 import com.google.android.exoplayer2.ExoPlayer
 import com.google.android.exoplayer2.MediaItem
 import com.google.android.exoplayer2.Player
+import com.google.android.exoplayer2.source.ProgressiveMediaSource
 import com.google.android.exoplayer2.ui.AspectRatioFrameLayout
 import com.google.android.exoplayer2.ui.StyledPlayerView
+import com.vitorpamplona.amethyst.VideoCache
 
 @Composable
 fun VideoView(videoUri: String) {
@@ -28,17 +30,17 @@ fun VideoView(videoUri: String) {
   }
 
   DisposableEffect(exoPlayer) {
-    exoPlayer.setMediaItem(MediaItem.fromUri(videoUri))
+    exoPlayer.setMediaSource(
+      ProgressiveMediaSource.Factory(VideoCache.get(context.applicationContext)).createMediaSource(MediaItem.fromUri(videoUri))
+    )
     exoPlayer.prepare()
-
     onDispose {
       exoPlayer.release()
     }
   }
 
   AndroidView(
-    modifier = Modifier
-      .fillMaxWidth(),
+    modifier = Modifier.fillMaxWidth(),
     factory = {
       StyledPlayerView(context).apply {
         player = exoPlayer

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

@@ -3,18 +3,26 @@ package com.vitorpamplona.amethyst.ui.components
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.border
 import androidx.compose.foundation.combinedClickable
-import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
-import androidx.compose.runtime.*
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.platform.LocalClipboardManager
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/ChannelFeedFilter.kt

@@ -0,0 +1,21 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.Channel
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+
+object ChannelFeedFilter: FeedFilter<Note>() {
+  lateinit var account: Account
+  lateinit var channel: Channel
+
+  fun loadMessagesBetween(accountLoggedIn: Account, channelId: String) {
+    account = accountLoggedIn
+    channel = LocalCache.getOrCreateChannel(channelId)
+  }
+
+  // returns the last Note of each user.
+  override fun feed(): List<Note> {
+    return channel.notes?.values?.filter { account.isAcceptable(it) }?.sortedBy { it.event?.createdAt }?.reversed() ?: emptyList()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/ChatroomFeedFilter.kt

@@ -0,0 +1,28 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+
+object ChatroomFeedFilter: FeedFilter<Note>() {
+  var account: Account? = null
+  var withUser: User? = null
+
+  fun loadMessagesBetween(accountIn: Account, userId: String) {
+    account = accountIn
+    withUser = LocalCache.checkGetOrCreateUser(userId)
+  }
+
+  // returns the last Note of each user.
+  override fun feed(): List<Note> {
+    val myAccount = account
+    val myUser = withUser
+
+    if (myAccount == null || myUser == null) return emptyList()
+
+    val messages = myAccount.userProfile().privateChatrooms[myUser] ?: return emptyList()
+
+    return messages.roomMessages.filter { myAccount.isAcceptable(it) }.sortedBy { it.event?.createdAt }.reversed()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/ChatroomListKnownFeedFilter.kt

@@ -0,0 +1,33 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.Note
+
+object ChatroomListKnownFeedFilter: FeedFilter<Note>() {
+  lateinit var account: Account
+
+  // returns the last Note of each user.
+  override fun feed(): List<Note> {
+    val me = account.userProfile()
+
+    val privateChatrooms = account.userProfile().privateChatrooms
+    val messagingWith = privateChatrooms.keys.filter {
+      me.hasSentMessagesTo(it) && account.isAcceptable(it)
+    }
+
+    val privateMessages = messagingWith.mapNotNull {
+      privateChatrooms[it]?.roomMessages?.sortedBy {
+        it.event?.createdAt
+      }?.lastOrNull {
+        it.event != null
+      }
+    }
+
+    val publicChannels = account.followingChannels().map {
+      it.notes.values.filter { account.isAcceptable(it) }.sortedBy { it.event?.createdAt }.lastOrNull { it.event != null }
+    }
+
+    return (privateMessages + publicChannels).filterNotNull().sortedBy { it.event?.createdAt }.reversed()
+  }
+
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/ChatroomListNewFeedFilter.kt

@@ -0,0 +1,29 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.Note
+
+object ChatroomListNewFeedFilter: FeedFilter<Note>() {
+  lateinit var account: Account
+
+  // returns the last Note of each user.
+  override fun feed(): List<Note> {
+    val me = ChatroomListKnownFeedFilter.account.userProfile()
+
+    val privateChatrooms = account.userProfile().privateChatrooms
+    val messagingWith = privateChatrooms.keys.filter {
+      !me.hasSentMessagesTo(it) && account.isAcceptable(it)
+    }
+
+    val privateMessages = messagingWith.mapNotNull {
+      privateChatrooms[it]?.roomMessages?.sortedBy {
+        it.event?.createdAt
+      }?.lastOrNull {
+        it.event != null
+      }
+    }
+
+    return privateMessages.sortedBy { it.event?.createdAt }.reversed()
+  }
+
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/FeedFilter.kt

@@ -0,0 +1,19 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import android.util.Log
+import kotlin.time.ExperimentalTime
+import kotlin.time.measureTimedValue
+
+abstract class FeedFilter<T>() {
+  @OptIn(ExperimentalTime::class)
+  fun loadTop(): List<T> {
+    val (feed, elapsed) = measureTimedValue {
+      feed().take(1000)
+    }
+
+    Log.d("Time","${this.javaClass.simpleName} Feed in ${elapsed} with ${feed.size} objects")
+    return feed
+  }
+
+  abstract fun feed(): List<T>
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/GlobalFeedFilter.kt

@@ -0,0 +1,21 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
+import nostr.postr.events.TextNoteEvent
+
+object GlobalFeedFilter: FeedFilter<Note>() {
+  lateinit var account: Account
+
+  override fun feed() = LocalCache.notes.values
+    .filter { account.isAcceptable(it) }
+    .filter {
+      (it.event is TextNoteEvent && (it.event as TextNoteEvent).replyTos.isEmpty()) ||
+      (it.event is ChannelMessageEvent && (it.event as ChannelMessageEvent).replyTos.isEmpty())
+    }
+    .sortedBy { it.event?.createdAt }
+    .reversed()
+
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/HiddenAccountsFeedFilter.kt

@@ -0,0 +1,10 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.User
+
+object HiddenAccountsFeedFilter: FeedFilter<User>() {
+  lateinit var account: Account
+
+  override fun feed() = account.hiddenUsers()
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/HomeConversationsFeedFilter.kt

@@ -0,0 +1,25 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.RepostEvent
+import nostr.postr.events.TextNoteEvent
+
+object HomeConversationsFeedFilter: FeedFilter<Note>() {
+  lateinit var account: Account
+
+  override fun feed(): List<Note> {
+    val user = account.userProfile()
+
+    return LocalCache.notes.values
+      .filter {
+        (it.event is TextNoteEvent || it.event is RepostEvent)
+          && it.author in user.follows
+          // && account.isAcceptable(it)  // This filter follows only. No need to check if acceptable
+          && !it.isNewThread()
+      }
+      .sortedBy { it.event?.createdAt }
+      .reversed()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/HomeNewThreadFeedFilter.kt

@@ -0,0 +1,25 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.RepostEvent
+import nostr.postr.events.TextNoteEvent
+
+object HomeNewThreadFeedFilter: FeedFilter<Note>() {
+  lateinit var account: Account
+
+  override fun feed(): List<Note> {
+    val user = account.userProfile()
+
+    return LocalCache.notes.values
+      .filter {
+        (it.event is TextNoteEvent || it.event is RepostEvent)
+          && it.author in user.follows
+          // && account.isAcceptable(it)  // This filter follows only. No need to check if acceptable
+          && it.isNewThread()
+      }
+      .sortedBy { it.event?.createdAt }
+      .reversed()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/NotificationFeedFilter.kt

@@ -0,0 +1,69 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
+import com.vitorpamplona.amethyst.service.model.ChannelMetadataEvent
+import com.vitorpamplona.amethyst.service.model.LnZapRequestEvent
+import com.vitorpamplona.amethyst.service.model.ReactionEvent
+import com.vitorpamplona.amethyst.service.model.RepostEvent
+import nostr.postr.events.TextNoteEvent
+
+object NotificationFeedFilter: FeedFilter<Note>() {
+  lateinit var account: Account
+
+  override fun feed(): List<Note> {
+    return account.userProfile().taggedPosts
+      .filter {
+           it.author == null
+        || (!account.isHidden(it.author!!) && it.author != account.userProfile())
+      }
+      .filter {
+           it.event !is ChannelCreateEvent
+        && it.event !is ChannelMetadataEvent
+        && it.event !is LnZapRequestEvent
+      }
+      .filter {
+        it.event !is TextNoteEvent
+        ||
+           (
+             it.event is TextNoteEvent
+             &&
+             (
+               it.replyTo?.lastOrNull()?.author == account.userProfile()
+                 ||
+               account.userProfile() in it.directlyCiteUsers()
+             )
+           )
+      }
+      .filter {
+        it.event !is ReactionEvent
+          ||
+          (
+            it.event is ReactionEvent
+              &&
+              (
+                it.replyTo?.lastOrNull()?.author == account.userProfile()
+                  ||
+                  account.userProfile() in it.directlyCiteUsers()
+                )
+            )
+      }
+      .filter {
+        it.event !is RepostEvent
+          ||
+          (
+            it.event is RepostEvent
+              &&
+              (
+                it.replyTo?.lastOrNull()?.author == account.userProfile()
+                  ||
+                  account.userProfile() in it.directlyCiteUsers()
+                )
+            )
+      }
+
+      .sortedBy { it.event?.createdAt }
+      .reversed()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/ThreadFeedFilter.kt

@@ -0,0 +1,21 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.ThreadAssembler
+
+object ThreadFeedFilter: FeedFilter<Note>() {
+  var noteId: String? = null
+
+  override fun feed(): List<Note> {
+    val cachedSignatures: MutableMap<Note, String> = mutableMapOf()
+    val eventsToWatch = noteId?.let { ThreadAssembler().findThreadFor(it) } ?: emptySet()
+    // Currently orders by date of each event, descending, at each level of the reply stack
+    val order = compareByDescending<Note> { it.replyLevelSignature(cachedSignatures) }
+
+    return eventsToWatch.sortedWith(order)
+  }
+
+  fun loadThread(noteId: String?) {
+    this.noteId = noteId
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileConversationsFeedFilter.kt

@@ -0,0 +1,24 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+
+object UserProfileConversationsFeedFilter: FeedFilter<Note>() {
+  var account: Account? = null
+  var user: User? = null
+
+  fun loadUserProfile(accountLoggedIn: Account, userId: String) {
+    account = accountLoggedIn
+    user = LocalCache.checkGetOrCreateUser(userId)
+  }
+
+  override fun feed(): List<Note> {
+    return user?.notes
+      ?.filter { account?.isAcceptable(it) == true && !it.isNewThread() }
+      ?.sortedBy { it.event?.createdAt }
+      ?.reversed()
+      ?: emptyList()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileFollowersFeedFilter.kt

@@ -1,23 +1,19 @@
-package com.vitorpamplona.amethyst.service
+package com.vitorpamplona.amethyst.ui.dal
 
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.User
-import nostr.postr.JsonFilter
-import nostr.postr.events.ContactListEvent
 
-object NostrUserProfileFollowersDataSource: NostrDataSource<User>("UserProfileFollowerFeed") {
+object UserProfileFollowersFeedFilter: FeedFilter<User>() {
   lateinit var account: Account
   var user: User? = null
 
-  fun loadUserProfile(userId: String) {
+  fun loadUserProfile(accountLoggedIn: Account, userId: String) {
+    account = accountLoggedIn
     user = LocalCache.users[userId]
-    resetFilters()
   }
 
   override fun feed(): List<User> {
     return user?.followers?.filter { account.isAcceptable(it) } ?: emptyList()
   }
-
-  override fun updateChannelFilters() {}
 }

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileFollowsFeedFilter.kt

@@ -0,0 +1,19 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.User
+
+object UserProfileFollowsFeedFilter: FeedFilter<User>() {
+  lateinit var account: Account
+  var user: User? = null
+
+  fun loadUserProfile(accountLoggedIn: Account, userId: String) {
+    account = accountLoggedIn
+    user = LocalCache.users[userId]
+  }
+
+  override fun feed(): List<User> {
+    return user?.follows?.filter { account.isAcceptable(it) }?.reversed() ?: emptyList()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileNewThreadFeedFilter.kt

@@ -0,0 +1,24 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+
+object UserProfileNewThreadFeedFilter: FeedFilter<Note>() {
+  var account: Account? = null
+  var user: User? = null
+
+  fun loadUserProfile(accountLoggedIn: Account, userId: String) {
+    account = accountLoggedIn
+    user = LocalCache.checkGetOrCreateUser(userId)
+  }
+
+  override fun feed(): List<Note> {
+    return user?.notes
+      ?.filter { account?.isAcceptable(it) == true && it.isNewThread() }
+      ?.sortedBy { it.event?.createdAt }
+      ?.reversed()
+      ?: emptyList()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileReportsFeedFilter.kt

@@ -0,0 +1,17 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+
+object UserProfileReportsFeedFilter: FeedFilter<Note>() {
+  var user: User? = null
+
+  fun loadUserProfile(userId: String) {
+    user = LocalCache.checkGetOrCreateUser(userId)
+  }
+
+  override fun feed(): List<Note> {
+    return user?.reports?.values?.flatten()?.sortedBy { it.event?.createdAt }?.reversed() ?: emptyList()
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/UserProfileZapsFeedFilter.kt

@@ -0,0 +1,18 @@
+package com.vitorpamplona.amethyst.ui.dal
+
+import com.vitorpamplona.amethyst.model.LocalCache
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.model.LnZapEvent
+
+object UserProfileZapsFeedFilter: FeedFilter<Pair<Note,Note>>() {
+  var user: User? = null
+
+  fun loadUserProfile(userId: String) {
+    user = LocalCache.checkGetOrCreateUser(userId)
+  }
+
+  override fun feed(): List<Pair<Note,Note>> {
+    return (user?.zaps?.filter { it.value != null }?.toList()?.sortedBy { (it.second?.event as? LnZapEvent)?.amount }?.reversed() ?: emptyList()) as List<Pair<Note, Note>>
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/navigation/AppBottomBar.kt

@@ -1,10 +1,11 @@
 package com.vitorpamplona.amethyst.ui.navigation
 
+import android.graphics.Rect
+import android.view.ViewTreeObserver
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.layout.wrapContentHeight
@@ -16,12 +17,21 @@ import androidx.compose.material.Icon
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.State
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
@@ -29,7 +39,7 @@ import androidx.compose.ui.unit.sp
 import androidx.navigation.NavHostController
 import com.vitorpamplona.amethyst.NotificationCache
 import com.vitorpamplona.amethyst.model.LocalCache
-import com.vitorpamplona.amethyst.ui.note.NewItemsBubble
+import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import kotlinx.coroutines.launch
 
 val bottomNavigationItems = listOf(
@@ -39,57 +49,91 @@ val bottomNavigationItems = listOf(
     Route.Notification
 )
 
+enum class Keyboard {
+    Opened, Closed
+}
+
 @Composable
-fun AppBottomBar(navController: NavHostController) {
+fun keyboardAsState(): State<Keyboard> {
+    val keyboardState = remember { mutableStateOf(Keyboard.Closed) }
+    val view = LocalView.current
+    DisposableEffect(view) {
+        val onGlobalListener = ViewTreeObserver.OnGlobalLayoutListener {
+            val rect = Rect()
+            view.getWindowVisibleDisplayFrame(rect)
+            val screenHeight = view.rootView.height
+            val keypadHeight = screenHeight - rect.bottom
+            keyboardState.value = if (keypadHeight > screenHeight * 0.15) {
+                Keyboard.Opened
+            } else {
+                Keyboard.Closed
+            }
+        }
+        view.viewTreeObserver.addOnGlobalLayoutListener(onGlobalListener)
+
+        onDispose {
+            view.viewTreeObserver.removeOnGlobalLayoutListener(onGlobalListener)
+        }
+    }
+
+    return keyboardState
+}
+
+@Composable
+fun AppBottomBar(navController: NavHostController, accountViewModel: AccountViewModel) {
     val currentRoute = currentRoute(navController)
     val coroutineScope = rememberCoroutineScope()
 
-    Column() {
-        Divider(
-            thickness = 0.25.dp
-        )
-        BottomNavigation(
-            modifier = Modifier,
-            elevation = 0.dp,
-            backgroundColor = MaterialTheme.colors.background
-        ) {
-            bottomNavigationItems.forEach { item ->
-                BottomNavigationItem(
-                    icon = { NotifiableIcon(item, currentRoute) },
-                    selected = currentRoute == item.route,
-                    onClick = {
-                        coroutineScope.launch {
-                            if (currentRoute != item.route) {
-                                navController.navigate(item.route){
-                                    navController.graph.startDestinationRoute?.let { start ->
-                                        popUpTo(start)
-                                        restoreState = true
-                                    }
-                                    launchSingleTop = true
-                                    restoreState = true
-                                }
-                            } else {
-                                // TODO: Make it scrool to the top
-                                navController.navigate(item.route){
-                                    navController.graph.startDestinationRoute?.let { start ->
-                                        popUpTo(start) { inclusive = item.route == Route.Home.route }
-                                        restoreState = true
-                                    }
+    val isKeyboardOpen by keyboardAsState()
 
-                                    launchSingleTop = true
-                                    restoreState = true
+    if (isKeyboardOpen == Keyboard.Closed) {
+        Column() {
+            Divider(
+                thickness = 0.25.dp
+            )
+            BottomNavigation(
+                modifier = Modifier,
+                elevation = 0.dp,
+                backgroundColor = MaterialTheme.colors.background
+            ) {
+                bottomNavigationItems.forEach { item ->
+                    BottomNavigationItem(
+                        icon = { NotifiableIcon(item, currentRoute, accountViewModel) },
+                        selected = currentRoute == item.route,
+                        onClick = {
+                            coroutineScope.launch {
+                                if (currentRoute != item.route) {
+                                    navController.navigate(item.route){
+                                        navController.graph.startDestinationRoute?.let { start ->
+                                            popUpTo(start)
+                                            restoreState = true
+                                        }
+                                        launchSingleTop = true
+                                        restoreState = true
+                                    }
+                                } else {
+                                    // TODO: Make it scrool to the top
+                                    navController.navigate(item.route){
+                                        navController.graph.startDestinationRoute?.let { start ->
+                                            popUpTo(start) { inclusive = item.route == Route.Home.route }
+                                            restoreState = true
+                                        }
+
+                                        launchSingleTop = true
+                                        restoreState = true
+                                    }
                                 }
                             }
                         }
-                    }
-                )
+                    )
+                }
             }
         }
     }
 }
 
 @Composable
-private fun NotifiableIcon(item: Route, currentRoute: String?) {
+private fun NotifiableIcon(item: Route, currentRoute: String?, accountViewModel: AccountViewModel) {
     Box(Modifier.size(if ("Home" == item.route) 25.dp else 23.dp)) {
         Icon(
             painter = painterResource(id = item.icon),
@@ -98,39 +142,52 @@ private fun NotifiableIcon(item: Route, currentRoute: String?) {
             tint = if (currentRoute == item.route) MaterialTheme.colors.primary else Color.Unspecified
         )
 
+        val accountState by accountViewModel.accountLiveData.observeAsState()
+        val account = accountState?.account ?: return
+
         // Notification
         val dbState = LocalCache.live.observeAsState()
+        val db = dbState.value ?: return
+
         val notifState = NotificationCache.live.observeAsState()
+        val notif = notifState.value ?: return
 
-        val db = dbState.value
-        val notif = notifState.value
+        var hasNewItems by remember { mutableStateOf<Boolean>(false) }
 
-        if (db != null && notif != null) {
-            if (item.hasNewItems(db.cache, notif.cache)) {
+        val context = LocalContext.current.applicationContext
+
+        LaunchedEffect(key1 = notif) {
+            hasNewItems = item.hasNewItems(account, notif.cache, context)
+        }
+
+        LaunchedEffect(key1 = db) {
+            hasNewItems = item.hasNewItems(account, notif.cache, context)
+        }
+
+        if (hasNewItems) {
+            Box(
+                Modifier
+                    .width(10.dp)
+                    .height(10.dp)
+                    .align(Alignment.TopEnd)
+            ) {
                 Box(
-                    Modifier
+                    modifier = Modifier
                         .width(10.dp)
                         .height(10.dp)
-                        .align(Alignment.TopEnd)
+                        .clip(shape = CircleShape)
+                        .background(MaterialTheme.colors.primary),
+                    contentAlignment = Alignment.TopEnd
                 ) {
-                    Box(
+                    Text(
+                        "",
+                        color = Color.White,
+                        textAlign = TextAlign.Center,
+                        fontSize = 12.sp,
                         modifier = Modifier
-                            .width(10.dp)
-                            .height(10.dp)
-                            .clip(shape = CircleShape)
-                            .background(MaterialTheme.colors.primary),
-                        contentAlignment = Alignment.TopEnd
-                    ) {
-                        Text(
-                            "",
-                            color = Color.White,
-                            textAlign = TextAlign.Center,
-                            fontSize = 12.sp,
-                            modifier = Modifier
-                                .wrapContentHeight()
-                                .align(Alignment.TopEnd)
-                        )
-                    }
+                            .wrapContentHeight()
+                            .align(Alignment.TopEnd)
+                    )
                 }
             }
         }