Add simple C binding for iOS and Android projects (#120)

* Dev: add simple C binding for iOS and Android projects

* System: add ci script

.github/workflows/build.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - master
-      - v4
+      - v5
     tags:
       - "v*"
   pull_request:
@@ -87,6 +87,7 @@ jobs:
 
       - name: Build & test
         id: build_test
+        working-directory: ./haskell
         run: |
           stack build ${{ matrix.stack_args }}
           echo "::set-output name=LOCAL_INSTALL_ROOT::$(stack path --local-install-root)"

.github/workflows/chat-lib-tests.yml

@@ -0,0 +1,17 @@
+name: Chat Lib Tests
+
+on: [push]
+
+jobs:
+  test:
+
+    runs-on: ubuntu-18.04
+    
+    steps:
+      - uses: actions/checkout@v1
+      - name: Test
+        run: cd packages/chat; 
+          cmake . -Bbuild; 
+          cd build;  
+          cmake --build .; 
+          ctest --verbose

.gitignore

@@ -49,3 +49,9 @@ stack.yaml.lock
 # chat database
 *.db
 *.db.bak
+packages/android/.idea
+packages/chat/.idea
+packages/chat/build
+packages/chat/Testing
+packages/ios/SimpleX Chat.xcodeproj/project.xcworkspace/xcuserdata
+packages/ios/SimpleX Chat.xcodeproj/xcuserdata

haskell/README.md

@@ -0,0 +1,232 @@
+<img align="right" src="images/logo.svg" alt="SimpleX logo" height="90">
+
+# SimpleX chat (legacy Haskell terminal prototype)
+
+## Private, secure, decentralized
+
+[![GitHub build](https://github.com/simplex-chat/simplex-chat/workflows/build/badge.svg)](https://github.com/simplex-chat/simplex-chat/actions?query=workflow%3Abuild)
+[![GitHub release](https://img.shields.io/github/v/release/simplex-chat/simplex-chat)](https://github.com/simplex-chat/simplex-chat/releases)
+
+> **NEW in v0.4: [groups](#groups) and [sending files](#sending-files)!**
+
+The motivation for SimpleX chat is [presented here](./simplex.md).
+
+SimpleX chat prototype is a thin terminal UI on top of [SimpleXMQ](https://github.com/simplex-chat/simplexmq) message broker that uses [SMP protocols](https://github.com/simplex-chat/simplexmq/blob/master/protocol).
+
+See [simplex.chat](https://simplex.chat) website for chat demo and the explanations of the system and how SMP protocol works.
+
+![simplex-chat](./images/connection.gif)
+
+## Table of contents
+
+- [Disclaimer](#disclaimer)
+- [Network topology](#network-topology)
+- [Terminal chat features](#terminal-chat-features)
+- [Installation](#installation)
+  - [Download chat client](#download-chat-client)
+  - [Build from source](#build-from-source)
+    - [Using Docker](#using-docker)
+    - [Using Haskell stack](#using-haskell-stack)
+- [Usage](#usage)
+  - [Running the chat client](#running-the-chat-client)
+  - [How to use SimpleX chat](#how-to-use-simplex-chat)
+  - [Groups](#groups)
+  - [Sending files](#sending-files)
+  - [Access chat history](#access-chat-history)
+- [Future roadmap](#future-roadmap)
+- [License](#license)
+
+## Disclaimer
+
+This is WIP implementation of SimpleX chat that implements a new network topology for asynchronous communication combining the advantages and avoiding the disadvantages of federated and P2P networks.
+
+If you expect a software being reliable most of the time and doing something useful, then this is probably not ready for you yet. We do use it for terminal chat though, and it seems to work most of the time - we would really appreciate if you try it and give us your feedback.
+
+**Please note:** The main differentiation of SimpleX network is the approach to internet message routing rather than encryption; for that reason no sufficient attention was paid to either TCP transport level encryption or to E2E encryption protocols - they are implemented in an ad hoc way based on RSA and AES algorithms. See [SMP protocol](https://github.com/simplex-chat/simplexmq/blob/master/protocol/simplex-messaging.md#appendix-a) on TCP transport encryption protocol (AEAD-GCM scheme, with an AES key negotiation based on RSA key hash known to the client in advance) and [this section](https://github.com/simplex-chat/simplexmq/blob/master/rfcs/2021-01-26-crypto.md#e2e-encryption) on E2E encryption protocol (an ad hoc hybrid scheme a la PGP). These protocols will change in a consumer ready version to something more robust.
+
+## Network topology
+
+SimpleX is a decentralized client-server network that uses redundant, disposable nodes to asynchronously pass the messages via message queues, providing receiver and sender anonymity.
+
+Unlike P2P networks, all messages are passed through one or several (for redundancy) servers, that do not even need to have persistence (in fact, the current [SMP server implementation](https://github.com/simplex-chat/simplexmq#smp-server) uses in-memory message storage, persisting only the queue records) - it provides better metadata protection than P2P designs, as no global participant ID is required, and avoids many [problems of P2P networks](https://github.com/simplex-chat/simplex-chat/blob/master/simplex.md#comparison-with-p2p-messaging-protocols).
+
+Unlike federated networks, the participating server nodes do NOT have records of the users, do NOT communicate with each other, do NOT store messages after they are delivered to the recipients, and there is no way to discover the full list of participating servers - it avoids the problem of metadata visibility that federated networks suffer from and better protects the network, as servers do not communicate with each other. Each server node provides unidirectional "dumb pipes" to the users, that do authorization without authentication, having no knowledge of the the users or their contacts. Each queue is assigned two RSA keys - one for receiver and one for sender - and each queue access is authorized with a signature created using a respective key's private counterpart.
+
+The routing of messages relies on the knowledge of client devices how user contacts and groups map at any given moment of time to these disposable queues on server nodes.
+
+## Terminal chat features
+
+- 1-to-1 chat with multiple people in the same terminal window.
+- Group messaging.
+- Sending files to contacts and groups.
+- Auto-populated recipient name - just type your messages to reply to the sender once the connection is established.
+- Demo SMP servers available and pre-configured in the app - or you can [deploy your own server](https://github.com/simplex-chat/simplexmq#using-smp-server-and-smp-agent).
+- No global identity or any names visible to the server(s), ensuring full privacy of your contacts and conversations.
+- E2E encryption, with RSA public key that has to be passed out-of-band (see [How to use SimpleX chat](#how-to-use-simplex-chat)).
+- Message signing and verification with automatically generated RSA keys.
+- Message integrity validation (via including the digests of the previous messages).
+- Authentication of each command/message by SMP servers with automatically generated RSA key pairs.
+- TCP transport encryption using SMP transport protocol.
+
+RSA keys are not used as identity, they are randomly generated for each contact.
+
+## Installation
+
+### Download chat client
+
+Download the chat binary for your system from the [latest stable release](https://github.com/simplex-chat/simplex-chat/releases) and make it executable as shown below.
+
+#### Linux and MacOS
+
+```sh
+chmod +x <binary>
+mv <binary> ~/.local/bin/simplex-chat
+```
+
+(or any other preferred location on PATH).
+
+On MacOS you also need to [allow Gatekeeper to run it](https://support.apple.com/en-us/HT202491).
+
+#### Windows
+
+```sh
+move <binary> %APPDATA%/local/bin/simplex-chat.exe
+```
+
+### Build from source
+
+#### Using Docker
+
+On Linux, you can build the chat executable using [docker build with custom output](https://docs.docker.com/engine/reference/commandline/build/#custom-build-outputs):
+
+```shell
+$ git clone git@github.com:simplex-chat/simplex-chat.git
+$ cd simplex-chat
+$ DOCKER_BUILDKIT=1 docker build --output ~/.local/bin .
+```
+
+> **Please note:** If you encounter ``version `GLIBC_2.28' not found`` error, rebuild it with `haskell:8.8.4-stretch` base image (change it in your local [Dockerfile](Dockerfile)).
+
+#### Using Haskell stack
+
+Install [Haskell stack](https://docs.haskellstack.org/en/stable/README/):
+
+```shell
+curl -sSL https://get.haskellstack.org/ | sh
+```
+
+and build the project:
+
+```shell
+$ git clone git@github.com:simplex-chat/simplex-chat.git
+$ cd simplex-chat
+$ stack install
+```
+
+## Usage
+
+### Running the chat client
+
+To start the chat client, run `simplex-chat` from the terminal.
+
+By default, app data directory is created in the home directory (`~/.simplex`, or `%APPDATA%/simplex` on Windows), and two SQLite database files `simplex.chat.db` and `simplex.agent.db` are initialized in it.
+
+To specify a different file path prefix for the database files use `-d` command line option:
+
+```shell
+$ simplex-chat -d alice
+```
+
+Running above, for example, would create `alice.chat.db` and `alice.agent.db` database files in current directory.
+
+Default SMP servers are hosted on Linode (London, UK and Fremont, CA) - they are [pre-configured in the app](https://github.com/simplex-chat/simplex-chat/blob/master/src/Simplex/Chat/Options.hs#L40). Base-64 encoded string after server host is the transport key digest.
+
+If you deployed your own SMP server(s) you can configure client via `-s` option:
+
+```shell
+$ simplex-chat -s smp.example.com:5223#KXNE1m2E1m0lm92WGKet9CL6+lO742Vy5G6nsrkvgs8=
+```
+
+The base-64 encoded string in server address is the digest of RSA transport handshake key that the server will generate on the first run and output its digest.
+
+You can still talk to people using default or any other server - it only affects the location of the message queue when you initiate the connection (and the reply queue can be on another server, as set by the other party's client).
+
+Run `simplex-chat -h` to see all available options.
+
+### How to use SimpleX chat
+
+Once you have started the chat, you will be prompted to specify your "display name" and an optional "full name" to create a local chat profile. Your display name is an alias for your contacts to refer to you by - it is not unique and does not serve as a global identity. In case different contacts chose the same display name, the chat client adds a numeric suffix to their local display names.
+
+This diagram shows how to connect and message a contact:
+
+<div align="center">
+  <img align="center" src="images/how-to-use-simplex.svg">
+</div>
+
+Once you've set up your local profile, enter `/c` (for `/connect`) to create a new connection and generate an invitation. Send this invitation to your contact via any other channel.
+
+You are able to create multiple invitations by entering `/connect` multiple times and sending these invitations to the corresponding contacts you'd like to connect with.
+
+The invitation has the format `smp::<server>::<queue_id>::<rsa_public_key_for_this_queue_only>`. The invitation can only be used once and even if this is intercepted, the attacker would not be able to use it to send you the messages via this queue once your contact confirms that the connection is established.
+
+The contact who received the invitation should enter `/c <invitation>` to accept the connection. This establishes the connection, and both parties are notified.
+
+They would then use `@<name> <message>` commands to send messages. You may also just start typing a message to send it to the contact that was the last.
+
+Use `/help` in chat to see the list of available commands.
+
+### Groups
+
+To create a group use `/g <group>`, then add contacts to it with `/a <group> <name>`and send messages with `#<group> <message>`. Use `/help groups` for other commands.
+
+![simplex-chat](./images/groups.gif)
+
+> **Please note**: the groups are not stored on any server, they are maintained as a list of members in the app database to whom the messages will be sent.
+
+### Sending files
+
+You can send a file to your contact with `/f @<contact> <file_path>` - the recipient will have to accept it before it is sent. Use `/help files` for other commands.
+
+![simplex-chat](./images/files.gif)
+
+You can send files to a group with `/f #<group> <file_path>`.
+
+### Access chat history
+
+> 🚧 **Section currently out of date - will be updated soon** 🏗
+
+SimpleX chat stores all your contacts and conversations in a local database file, making it private and portable by design, fully owned and controlled by you.
+
+You can search your chat history via SQLite database file:
+
+```
+sqlite3 ~/.simplex/smp-chat.db
+```
+
+Now you can query `messages` table, for example:
+
+```sql
+select * from messages
+where conn_alias = cast('alice' as blob)
+  and body like '%cats%'
+order by internal_id desc;
+```
+
+> **Please note:** SQLite foreign key constraints are disabled by default, and must be **[enabled separately for each database connection](https://sqlite.org/foreignkeys.html#fk_enable)**. The latter can be achieved by running `PRAGMA foreign_keys = ON;` command on an open database connection. By running data altering queries without enabling foreign keys prior to that, you may risk putting your database in an inconsistent state.
+
+## Future roadmap
+
+1. Mobile and desktop apps (in progress).
+2. SMP protocol improvements:
+    - SMP queue redundancy and rotation.
+    - Message delivery confirmation.
+    - Support multiple devices.
+3. Privacy-preserving identity server for optional DNS-based contact/group addresses to simplify connection and discovery, but not used to deliver messages:
+    - keep all your contacts and groups even if you lose the domain.
+    - the server doesn't have information about your contacts and groups.
+4. Media server to optimize sending large files to groups.
+5. Channels server for large groups and broadcast channels.
+
+## License
+
+[AGPL v3](./LICENSE)

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packages/android/.gitignore

@@ -0,0 +1,15 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

packages/android/.idea/.gitignore

@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml

packages/android/.idea/.name

@@ -0,0 +1 @@
+SimpleX Chat

packages/android/.idea/codeStyles/Project.xml

@@ -0,0 +1,123 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <JetCodeStyleSettings>
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </JetCodeStyleSettings>
+    <codeStyleSettings language="XML">
+      <option name="FORCE_REARRANGE_MODE" value="1" />
+      <indentOptions>
+        <option name="CONTINUATION_INDENT_SIZE" value="4" />
+      </indentOptions>
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+          <section>
+            <rule>
+              <match>
+                <AND>
+                  <NAME>xmlns:android</NAME>
+                  <XML_ATTRIBUTE />
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+                </AND>
+              </match>
+            </rule>
+          </section>
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+            </rule>
+          </section>
+          <section>
+            <rule>
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+                <AND>
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+            <rule>
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+                  <NAME>name</NAME>
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+          </section>
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+              <order>BY_NAME</order>
+            </rule>
+          </section>
+        </rules>
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+    </codeStyleSettings>
+    <codeStyleSettings language="kotlin">
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+    </codeStyleSettings>
+  </code_scheme>
+</component>

packages/android/.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
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+  <state>
+    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
+  </state>
+</component>

packages/android/.idea/compiler.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="11" />
+  </component>
+</project>

packages/android/.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>

packages/android/app/.gitignore

@@ -0,0 +1 @@
+/build

packages/android/app/build.gradle

@@ -0,0 +1,69 @@
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdk 31
+
+    defaultConfig {
+        applicationId "chat.simplex.app"
+        minSdk 21
+        targetSdk 31
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        externalNativeBuild {
+            cmake {
+                cppFlags '-std=c++17'
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+    externalNativeBuild {
+        cmake {
+            path file('src/main/cpp/CMakeLists.txt')
+            version '3.10.2'
+        }
+    }
+    buildFeatures {
+        compose true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion "1.0.4"
+        kotlinCompilerVersion "1.5.31"
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.core:core-ktx:1.6.0'
+    implementation 'androidx.appcompat:appcompat:1.3.1'
+    implementation "androidx.compose.ui:ui:1.0.4"
+    implementation "androidx.compose.runtime:runtime-livedata:1.0.4"
+    implementation "androidx.compose.material:material:1.0.4"
+    implementation "androidx.compose.animation:animation:1.0.4"
+    implementation "androidx.compose.animation:animation-core:1.0.4"
+    implementation 'androidx.activity:activity-compose:1.4.0-rc01'
+
+    implementation 'com.google.android.material:material:1.4.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.1'
+    implementation 'androidx.compose.ui:ui-tooling-preview:1.0.4'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+}

packages/android/app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

packages/android/app/src/androidTest/java/chat/simplex/app/ExampleInstrumentedTest.kt

@@ -0,0 +1,24 @@
+package chat.simplex.app
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("chat.simplex.app", appContext.packageName)
+    }
+}

packages/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="chat.simplex.app">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.SimpleXChat">
+        <activity
+            android:name=".MainActivity"
+            android:windowSoftInputMode="adjustResize"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

packages/android/app/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,54 @@
+# For more information about using CMake with Android Studio, read the
+# documentation: https://d.android.com/studio/projects/add-native-code.html
+
+# Sets the minimum version of CMake required to build the native library.
+
+cmake_minimum_required(VERSION 3.10.2)
+
+# Declares and names the project.
+
+project("app")
+
+include_directories(include)
+
+add_subdirectory( ../../../../../chat/src build/src )
+
+# Creates and names a library, sets it as either STATIC
+# or SHARED, and provides the relative paths to its source code.
+# You can define multiple libraries, and CMake builds them for you.
+# Gradle automatically packages shared libraries with your APK.
+
+add_library( # Sets the name of the library.
+        app
+
+        # Sets the library as a shared library.
+        SHARED
+
+        # Provides a relative path to your source file(s).
+        native-lib.cpp)
+
+# Searches for a specified prebuilt library and stores the path as a
+# variable. Because CMake includes system libraries in the search path by
+# default, you only need to specify the name of the public NDK library
+# you want to add. CMake verifies that the library exists before
+# completing its build.
+
+find_library( # Sets the name of the path variable.
+        log-lib
+
+        # Specifies the name of the NDK library that
+        # you want CMake to locate.
+        log)
+
+# Specifies libraries CMake should link to your target library. You
+# can link multiple libraries, such as libraries you define in this
+# build script, prebuilt third-party libraries, or system libraries.
+
+target_link_libraries( # Specifies the target library.
+        app
+
+        # Links the target library to the log library
+        # included in the NDK.
+        ${log-lib}
+
+        SimpleXChatLib)

packages/android/app/src/main/cpp/native-lib.cpp

@@ -0,0 +1,15 @@
+#include <jni.h>
+#include <string>
+
+#include "../../../../../chat/include/protocol.h"
+
+extern "C" JNIEXPORT jstring JNICALL
+Java_chat_simplex_app_Protocol_executeCommand(
+        JNIEnv* env,
+        jclass clazz,
+        jstring command) {
+    const char *utf8command = env->GetStringUTFChars(command, JNI_FALSE);
+    jstring result = env->NewStringUTF(executeCommand(utf8command));
+    env->ReleaseStringUTFChars(command, utf8command);
+    return result;
+}

packages/android/app/src/main/java/chat/simplex/app/MainActivity.kt

@@ -0,0 +1,91 @@
+package chat.simplex.app
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Send
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment.Companion.Center
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+
+class MainActivity : ComponentActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        setContent {
+            var history by remember { mutableStateOf(mutableListOf("Session started:")) }
+            var inputValue by remember { mutableStateOf("") }
+            var inProgress by remember { mutableStateOf(false) }
+
+            fun sendMessage() {
+                CoroutineScope(Dispatchers.IO).launch {
+                    inProgress = true
+                    val str = Protocol.executeCommand(inputValue)
+                    inputValue = ""
+                    val newList = mutableListOf<String>()
+                    newList.addAll(history)
+                    newList.add(str)
+                    Thread.sleep(1000); // emulate work
+                    history = newList
+                    inProgress = false
+                }
+            }
+
+            MaterialTheme(colors = lightColors()) {
+                Surface(color = Color.White) {
+                    Column {
+                        LazyColumn(Modifier.weight(1.0f).fillMaxWidth()) {
+                            itemsIndexed(history) { index: Int, message: String ->
+                                if (index == 0) {
+                                    Spacer(modifier = Modifier.height(8.dp))
+                                }
+                                MessageView(message = message)
+                            }
+                        }
+                        Row {
+                            TextField(
+                                modifier = Modifier.weight(1f),
+                                value = inputValue,
+                                onValueChange = { inputValue = it },
+                                keyboardOptions = KeyboardOptions(imeAction = androidx.compose.ui.text.input.ImeAction.Send),
+                                keyboardActions = KeyboardActions { sendMessage() },
+                                singleLine = true
+                            )
+                            if (inProgress) {
+                                Box(Modifier.height(56.dp).width(56.dp)) {
+                                    CircularProgressIndicator(modifier = Modifier.align(Center))
+                                }
+                            }
+                            else {
+                                Button(
+                                    modifier = Modifier.height(56.dp),
+                                    onClick = { sendMessage() },
+                                    enabled = inputValue.isNotBlank(),
+                                ) {
+                                    Icon(
+                                        imageVector = Icons.Default.Send,
+                                        contentDescription = "Send"
+                                    )
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

packages/android/app/src/main/java/chat/simplex/app/MessageView.kt

@@ -0,0 +1,35 @@
+package chat.simplex.app
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.Surface
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun MessageView(message: String) {
+    Box(Modifier.padding(4.dp)) {
+        Surface(color = Color.LightGray, modifier = Modifier.clip(shape = RoundedCornerShape(8.dp))) {
+            Box(Modifier.padding(8.dp)) {
+                Text(text = message)
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true,
+        widthDp = 200,
+        heightDp = 50,
+        backgroundColor = android.graphics.Color.BLACK.toLong())
+@Composable
+fun DefaultMessageView() {
+    // A surface container using the 'background' color from the theme
+    Surface(color = Color.White, modifier = Modifier.padding(16.dp)) {
+        MessageView(message = "Hello world!")
+    }
+}

packages/android/app/src/main/java/chat/simplex/app/Protocol.kt

@@ -0,0 +1,18 @@
+package chat.simplex.app
+
+class Protocol {
+
+    companion object {
+        // Used to load the 'app' library on application startup.
+        init {
+            System.loadLibrary("app")
+        }
+
+        /**
+         * A native method that is implemented by the 'app' native library,
+         * which is packaged with this application.
+         */
+        @JvmStatic
+        external fun executeCommand(command: String): String
+    }
+}

packages/android/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>

packages/android/app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>

packages/android/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <TextView
+        android:id="@+id/sample_text"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Hello World!"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

packages/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

packages/android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

packages/android/app/src/main/res/values-night/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.SimpleXChat" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_200</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/black</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_200</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

packages/android/app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

packages/android/app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">SimpleX Chat</string>
+</resources>

packages/android/app/src/main/res/values/themes.xml

@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.SimpleXChat" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>

packages/android/app/src/test/java/chat/simplex/app/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package chat.simplex.app
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}

packages/android/build.gradle

@@ -0,0 +1,18 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath "com.android.tools.build:gradle:7.0.3"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.31"
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

packages/android/gradle.properties

@@ -0,0 +1,21 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=true
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=true
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official

packages/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Sat Oct 30 16:37:31 BST 2021
+distributionBase=GRADLE_USER_HOME
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME

packages/android/gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

packages/android/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

packages/android/settings.gradle

@@ -0,0 +1,10 @@
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+        jcenter() // Warning: this repository is going to shut down soon
+    }
+}
+rootProject.name = "SimpleX Chat"
+include ':app'

packages/chat/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.11) # set min version of cmake
+
+project(SimpleXChat)
+
+enable_testing()
+
+include_directories(include)
+
+add_subdirectory( src build/src )
+add_subdirectory( test build/test )

packages/chat/include/protocol.h

@@ -0,0 +1,17 @@
+// Public API: Protocol.h
+
+#ifndef protocol_h
+#define protocol_h
+
+#ifdef __cplusplus
+extern "C" {  // only need to export C interface if
+// used by C++ source code
+#endif
+
+const char* executeCommand(const char* command);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* protocol_h */

packages/chat/src/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.10) # set min version of cmake
+
+project(SimpleXChatLib) # create chat lib
+
+set(CMAKE_CXX_STANDARD 17)
+# set(CMAKE_CXX_CLANG_TIDY "clang-tidy;-header-filter=../include;-checks=*;")
+
+include_directories ("${PROJECT_SOURCE_DIR}/../include")
+file(GLOB SRC_FILES ${PROJECT_SOURCE_DIR}/*.cpp)
+add_library(SimpleXChatLib STATIC ${SRC_FILES})

packages/chat/src/protocol.cpp

@@ -0,0 +1,16 @@
+#include "protocol.h"
+
+#include <string>
+
+using ::std::string;
+
+const char* executeCommand(const char *command) {
+    if (command == nullptr) {
+        auto *output = new string("> \nFailed");
+        return output->c_str();
+    }
+    string cmd(command);
+    string result = "Successful";
+    auto *output = new string("> " + cmd + "\n" + result);
+    return output->c_str();
+}

packages/chat/test/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.11)
+project(SimpleXChatTest)
+
+include(FetchContent)
+FetchContent_Declare(
+        googletest
+        # Specify the commit you depend on and update it regularly.
+        URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
+)
+FetchContent_MakeAvailable(googletest)
+
+# Now simply link against gtest or gtest_main as needed. Eg
+file(GLOB SRC_FILES ${PROJECT_SOURCE_DIR}/*.cpp)
+add_executable(SimpleXChatTest ${SRC_FILES})
+
+target_link_libraries(SimpleXChatTest gtest_main SimpleXChatLib)
+add_test(NAME SimpleXChatTest COMMAND SimpleXChatTest)

packages/chat/test/protocol_test.cpp

@@ -0,0 +1,18 @@
+
+#include "protocol.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+TEST(ProtocolTest, SuccessfulCommand) {
+
+    EXPECT_STREQ(executeCommand("Test1"), "> Test1\nSuccessful");
+    EXPECT_STREQ(executeCommand("Test2"), "> Test2\nSuccessful");
+    EXPECT_STREQ(executeCommand("Test3"), "> Test3\nSuccessful");
+}
+
+TEST(ProtocolTest, NullCommand) {
+    EXPECT_STREQ(executeCommand(nullptr), "> \nFailed");
+}
+
+}  // namespace

packages/ios/SimpleX Chat.xcodeproj/project.pbxproj

@@ -0,0 +1,657 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 55;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		5CBF96A9272D9CA60021E76D /* SimpleX_ChatApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5CBF96A8272D9CA60021E76D /* SimpleX_ChatApp.swift */; };
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+		843E324C272F04F100348BAB /* protocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 843E324B272F04F100348BAB /* protocol.h */; };
+		843E324E272F04FA00348BAB /* protocol.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 843E324D272F04FA00348BAB /* protocol.cpp */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXContainerItemProxy section */
+		5CBF96B6272D9CAA0021E76D /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 5CBF969D272D9CA60021E76D /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 5CBF96A4272D9CA60021E76D;
+			remoteInfo = "SimpleX Chat";
+		};
+		5CBF96C0272D9CAA0021E76D /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 5CBF969D272D9CA60021E76D /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = 5CBF96A4272D9CA60021E76D;
+			remoteInfo = "SimpleX Chat";
+		};
+/* End PBXContainerItemProxy section */
+
+/* Begin PBXFileReference section */
+		5CBF96A5272D9CA60021E76D /* SimpleX Chat.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "SimpleX Chat.app"; sourceTree = BUILT_PRODUCTS_DIR; };
+		5CBF96A8272D9CA60021E76D /* SimpleX_ChatApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SimpleX_ChatApp.swift; sourceTree = "<group>"; };
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+		5CBF96B9272D9CAA0021E76D /* SimpleX_ChatTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SimpleX_ChatTests.swift; sourceTree = "<group>"; };
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+/* End PBXFileReference section */
+
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+		5CBF96A2272D9CA60021E76D /* Frameworks */ = {
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+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		5CBF96B2272D9CAA0021E76D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
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+				GENERATE_INFOPLIST_FILE = YES;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = "chat.simplex.SimpleX-ChatUITests";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_TARGET_NAME = "SimpleX Chat";
+			};
+			name = Debug;
+		};
+		5CBF96D1272D9CAA0021E76D /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = 9767FTRA3G;
+				GENERATE_INFOPLIST_FILE = YES;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = "chat.simplex.SimpleX-ChatUITests";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_EMIT_LOC_STRINGS = NO;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				TEST_TARGET_NAME = "SimpleX Chat";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		5CBF96A0272D9CA60021E76D /* Build configuration list for PBXProject "SimpleX Chat" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				5CBF96C7272D9CAA0021E76D /* Debug */,
+				5CBF96C8272D9CAA0021E76D /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		5CBF96C9272D9CAA0021E76D /* Build configuration list for PBXNativeTarget "SimpleX Chat" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				5CBF96CA272D9CAA0021E76D /* Debug */,
+				5CBF96CB272D9CAA0021E76D /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		5CBF96CC272D9CAA0021E76D /* Build configuration list for PBXNativeTarget "SimpleX ChatTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				5CBF96CD272D9CAA0021E76D /* Debug */,
+				5CBF96CE272D9CAA0021E76D /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		5CBF96CF272D9CAA0021E76D /* Build configuration list for PBXNativeTarget "SimpleX ChatUITests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				5CBF96D0272D9CAA0021E76D /* Debug */,
+				5CBF96D1272D9CAA0021E76D /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 5CBF969D272D9CA60021E76D /* Project object */;
+}

packages/ios/SimpleX Chat.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

packages/ios/SimpleX Chat.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

packages/ios/SimpleX Chat.xcodeproj/xcuserdata/evgeny.xcuserdatad/xcschemes/xcschememanagement.plist

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>SimpleX Chat.xcscheme_^#shared#^_</key>
+		<dict>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>

packages/ios/SimpleX Chat/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

packages/ios/SimpleX Chat/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,98 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "83.5x83.5"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

packages/ios/SimpleX Chat/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

packages/ios/SimpleX Chat/ContentView.swift

@@ -0,0 +1,69 @@
+//
+//  ContentView.swift
+//  SimpleX Chat
+//
+//  Created by Evgeny on 30/10/2021.
+//
+
+import SwiftUI
+
+struct ContentView: View {
+    @State var history: [String] = ["Start session:"]
+    @State var text: String = ""
+    @State var inProgress: Bool = false
+    
+    func sendMessage() {
+        DispatchQueue.global().async {
+            let string: String = self.$text.wrappedValue
+            inProgress = true
+            text = ""
+            if let result = executeCommand(string),
+                let stringResult = String(utf8String: result) {
+                sleep(1) // emulate work
+                history += [stringResult]
+            }
+            inProgress = false
+        }
+    }
+
+    var body: some View {
+        VStack {
+            ScrollView {
+                LazyVStack {
+                    ForEach(history, id: \.self) { msg in
+                        MessageView(message: msg, isCurrentUser: false)
+                     }
+                }
+                .padding(10)
+            }
+            .frame(minWidth: 0,
+                   maxWidth: .infinity,
+                   minHeight: 0,
+                   maxHeight: .infinity,
+                   alignment: .topLeading)
+           HStack {
+               TextField("Message...", text: $text)
+                  .textFieldStyle(RoundedBorderTextFieldStyle())
+                  .frame(minHeight: CGFloat(30))
+               if (inProgress) {
+                   ProgressView()
+                       .frame(width: 40,
+                              height: 20,
+                              alignment: .center)
+               }
+               else {
+                   Button(action: sendMessage) {
+                       Text("Send")
+                   }.disabled(text.isEmpty)
+               }
+            }.frame(minHeight: CGFloat(30)).padding()
+        }
+    }
+}
+
+struct ContentView_Previews: PreviewProvider {
+    static var previews: some View {
+        ContentView()
+    }
+}
+

packages/ios/SimpleX Chat/MessageView.swift

@@ -0,0 +1,32 @@
+//
+//  ContentView.swift
+//  SimpleX Chat
+//
+//  Created by Evgeny on 30/10/2021.
+//
+
+import SwiftUI
+
+struct MessageView: View {
+    var message: String
+    var isCurrentUser: Bool
+    
+    var body: some View {
+        Text(message)
+            .padding(10)
+            .foregroundColor(isCurrentUser ? Color.white : Color.black)
+            .background(isCurrentUser ? Color.blue : Color(UIColor(red: 240/255, green: 240/255, blue: 240/255, alpha: 1.0)))
+            .cornerRadius(10)
+            .frame(minWidth: 100,
+                    maxWidth: .infinity,
+                    minHeight: 0,
+                    maxHeight: .infinity,
+                    alignment: .leading)
+    }
+}
+
+struct MessageView_Previews: PreviewProvider {
+    static var previews: some View {
+        MessageView(message: "> Send message: \"Hello world!\"\nSuccessful", isCurrentUser: false)
+    }
+}

packages/ios/SimpleX Chat/Messages.swift

@@ -0,0 +1,20 @@
+//
+//  Messages.swift
+//  SimpleX Chat
+//
+//  Created by Evgeny on 30/10/2021.
+//
+
+import SwiftUI
+
+struct Messages: View {
+    var body: some View {
+        Text(/*@START_MENU_TOKEN@*/"Hello, World!"/*@END_MENU_TOKEN@*/)
+    }
+}
+
+struct Messages_Previews: PreviewProvider {
+    static var previews: some View {
+        Messages()
+    }
+}

packages/ios/SimpleX Chat/Preview Content/Preview Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}