PoC for rust/dart ffi working.

mobile/.editorconfig

@@ -0,0 +1,2 @@
+[*.dart]
+indent_size = 2

mobile/.flutter_rust_bridge.yml

@@ -0,0 +1,7 @@
+rust_input:
+  - native/src/api.rs
+dart_output:
+  - lib/bridge_generated.dart
+dart_decl_output: lib/bridge_definitions.dart
+dart_format_line_length: 120
+wasm: false

mobile/.gitignore

@@ -0,0 +1,51 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
+native/target
+xcuserdata
+jniLibs
+
+Cargo.lock
+pubspec.lock

mobile/.metadata

@@ -0,0 +1,44 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled.
+
+version:
+  revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+  channel: stable
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: android
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: ios
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: linux
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: macos
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: web
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: windows
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'

mobile/.tool-versions

@@ -0,0 +1 @@
+java liberica-8u322+6

mobile/LICENSE-MIT

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright 2022 Viet Dinh.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

mobile/LICENSE.md

@@ -0,0 +1,3 @@
+This portion of the software is covered under the terms of the [Chaos
+License](../LICENSE.md). Portions of the code in this mobile module are used under the terms of the
+[MIT License](./LICENSE-MIT).

mobile/analysis_options.yaml

@@ -0,0 +1,29 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options

mobile/android/.gitignore

@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

mobile/android/app/build.gradle

@@ -0,0 +1,99 @@
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.nebcorp_hias.cuttle"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
+
+[
+    Debug: null,
+    Profile: '--release',
+    Release: '--release'
+].each {
+    def taskPostfix = it.key
+    def profileMode = it.value
+    tasks.whenTaskAdded { task ->
+        if (task.name == "javaPreCompile$taskPostfix") {
+            task.dependsOn "cargoBuild$taskPostfix"
+        }
+    }
+    tasks.register("cargoBuild$taskPostfix", Exec) {
+        workingDir "../../native"
+        environment ANDROID_NDK_HOME: "$ANDROID_NDK"
+        commandLine 'cargo', 'ndk',
+            // the 2 ABIs below are used by real Android devices
+            '-t', 'armeabi-v7a',
+            '-t', 'arm64-v8a',
+            // for the simulator
+            '-t', 'x86_64',
+            '-o', '../android/app/src/main/jniLibs', 'build'
+        if (profileMode != null) {
+            args profileMode
+        }
+    }
+}

mobile/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.nebcorp_hias.cuttle">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

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

@@ -0,0 +1,34 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.nebcorp_hias.cuttle">
+   <application
+        android:label="cuttle"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+</manifest>

mobile/android/app/src/main/kotlin/main/com/nebcorp-hias/cuttle/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.nebcorp_hias.cuttle
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}

mobile/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

mobile/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

mobile/android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

mobile/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

mobile/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.nebcorp_hias.cuttle">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>

mobile/android/build.gradle

@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.7.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.2.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+tasks.register("clean", Delete) {
+    delete rootProject.buildDir
+}

mobile/android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true

mobile/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip

mobile/android/settings.gradle

@@ -0,0 +1,11 @@
+include ':app'
+
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
+
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

mobile/justfile

@@ -0,0 +1,18 @@
+default: gen lint
+
+gen:
+    flutter pub get
+    flutter_rust_bridge_codegen
+
+lint:
+    cd native && cargo fmt
+    dart format .
+
+clean:
+    flutter clean
+    cd native && cargo clean
+    
+serve *args='':
+    flutter pub run flutter_rust_bridge:serve {{args}}
+
+# vim:expandtab:sw=4:ts=4

mobile/lib/bridge_definitions.dart

@@ -0,0 +1,30 @@
+// AUTO GENERATED FILE, DO NOT EDIT.
+// Generated by `flutter_rust_bridge`@ 1.81.0.
+// ignore_for_file: non_constant_identifier_names, unused_element, duplicate_ignore, directives_ordering, curly_braces_in_flow_control_structures, unnecessary_lambdas, slash_for_doc_comments, prefer_const_literals_to_create_immutables, implicit_dynamic_list_literal, duplicate_import, unused_import, unnecessary_import, prefer_single_quotes, prefer_const_constructors, use_super_parameters, always_use_package_imports, annotate_overrides, invalid_use_of_protected_member, constant_identifier_names, invalid_use_of_internal_member, prefer_is_empty, unnecessary_const
+
+import 'dart:convert';
+import 'dart:async';
+import 'package:meta/meta.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge.dart';
+import 'package:uuid/uuid.dart';
+
+abstract class Native {
+  Future<Platform> platform({dynamic hint});
+
+  FlutterRustBridgeTaskConstMeta get kPlatformConstMeta;
+
+  Future<bool> rustReleaseMode({dynamic hint});
+
+  FlutterRustBridgeTaskConstMeta get kRustReleaseModeConstMeta;
+}
+
+enum Platform {
+  Unknown,
+  AndroidBish,
+  Ios,
+  Windows,
+  Unix,
+  MacIntel,
+  MacApple,
+  Wasm,
+}

mobile/lib/bridge_generated.dart

@@ -0,0 +1,207 @@
+// AUTO GENERATED FILE, DO NOT EDIT.
+// Generated by `flutter_rust_bridge`@ 1.81.0.
+// ignore_for_file: non_constant_identifier_names, unused_element, duplicate_ignore, directives_ordering, curly_braces_in_flow_control_structures, unnecessary_lambdas, slash_for_doc_comments, prefer_const_literals_to_create_immutables, implicit_dynamic_list_literal, duplicate_import, unused_import, unnecessary_import, prefer_single_quotes, prefer_const_constructors, use_super_parameters, always_use_package_imports, annotate_overrides, invalid_use_of_protected_member, constant_identifier_names, invalid_use_of_internal_member, prefer_is_empty, unnecessary_const
+
+import "bridge_definitions.dart";
+import 'dart:convert';
+import 'dart:async';
+import 'package:meta/meta.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge.dart';
+import 'package:uuid/uuid.dart';
+
+import 'dart:convert';
+import 'dart:async';
+import 'package:meta/meta.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge.dart';
+import 'package:uuid/uuid.dart';
+
+import 'dart:ffi' as ffi;
+
+class NativeImpl implements Native {
+  final NativePlatform _platform;
+  factory NativeImpl(ExternalLibrary dylib) => NativeImpl.raw(NativePlatform(dylib));
+
+  /// Only valid on web/WASM platforms.
+  factory NativeImpl.wasm(FutureOr<WasmModule> module) => NativeImpl(module as ExternalLibrary);
+  NativeImpl.raw(this._platform);
+  Future<Platform> platform({dynamic hint}) {
+    return _platform.executeNormal(FlutterRustBridgeTask(
+      callFfi: (port_) => _platform.inner.wire_platform(port_),
+      parseSuccessData: _wire2api_platform,
+      constMeta: kPlatformConstMeta,
+      argValues: [],
+      hint: hint,
+    ));
+  }
+
+  FlutterRustBridgeTaskConstMeta get kPlatformConstMeta => const FlutterRustBridgeTaskConstMeta(
+        debugName: "platform",
+        argNames: [],
+      );
+
+  Future<bool> rustReleaseMode({dynamic hint}) {
+    return _platform.executeNormal(FlutterRustBridgeTask(
+      callFfi: (port_) => _platform.inner.wire_rust_release_mode(port_),
+      parseSuccessData: _wire2api_bool,
+      constMeta: kRustReleaseModeConstMeta,
+      argValues: [],
+      hint: hint,
+    ));
+  }
+
+  FlutterRustBridgeTaskConstMeta get kRustReleaseModeConstMeta => const FlutterRustBridgeTaskConstMeta(
+        debugName: "rust_release_mode",
+        argNames: [],
+      );
+
+  void dispose() {
+    _platform.dispose();
+  }
+// Section: wire2api
+
+  bool _wire2api_bool(dynamic raw) {
+    return raw as bool;
+  }
+
+  int _wire2api_i32(dynamic raw) {
+    return raw as int;
+  }
+
+  Platform _wire2api_platform(dynamic raw) {
+    return Platform.values[raw as int];
+  }
+}
+
+// Section: api2wire
+
+// Section: finalizer
+
+class NativePlatform extends FlutterRustBridgeBase<NativeWire> {
+  NativePlatform(ffi.DynamicLibrary dylib) : super(NativeWire(dylib));
+
+// Section: api2wire
+
+// Section: finalizer
+
+// Section: api_fill_to_wire
+}
+
+// ignore_for_file: camel_case_types, non_constant_identifier_names, avoid_positional_boolean_parameters, annotate_overrides, constant_identifier_names
+
+// AUTO GENERATED FILE, DO NOT EDIT.
+//
+// Generated by `package:ffigen`.
+// ignore_for_file: type=lint
+
+/// generated by flutter_rust_bridge
+class NativeWire implements FlutterRustBridgeWireBase {
+  @internal
+  late final dartApi = DartApiDl(init_frb_dart_api_dl);
+
+  /// Holds the symbol lookup function.
+  final ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName) _lookup;
+
+  /// The symbols are looked up in [dynamicLibrary].
+  NativeWire(ffi.DynamicLibrary dynamicLibrary) : _lookup = dynamicLibrary.lookup;
+
+  /// The symbols are looked up with [lookup].
+  NativeWire.fromLookup(ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName) lookup) : _lookup = lookup;
+
+  void store_dart_post_cobject(
+    DartPostCObjectFnType ptr,
+  ) {
+    return _store_dart_post_cobject(
+      ptr,
+    );
+  }
+
+  late final _store_dart_post_cobjectPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(DartPostCObjectFnType)>>('store_dart_post_cobject');
+  late final _store_dart_post_cobject = _store_dart_post_cobjectPtr.asFunction<void Function(DartPostCObjectFnType)>();
+
+  Object get_dart_object(
+    int ptr,
+  ) {
+    return _get_dart_object(
+      ptr,
+    );
+  }
+
+  late final _get_dart_objectPtr = _lookup<ffi.NativeFunction<ffi.Handle Function(ffi.UintPtr)>>('get_dart_object');
+  late final _get_dart_object = _get_dart_objectPtr.asFunction<Object Function(int)>();
+
+  void drop_dart_object(
+    int ptr,
+  ) {
+    return _drop_dart_object(
+      ptr,
+    );
+  }
+
+  late final _drop_dart_objectPtr = _lookup<ffi.NativeFunction<ffi.Void Function(ffi.UintPtr)>>('drop_dart_object');
+  late final _drop_dart_object = _drop_dart_objectPtr.asFunction<void Function(int)>();
+
+  int new_dart_opaque(
+    Object handle,
+  ) {
+    return _new_dart_opaque(
+      handle,
+    );
+  }
+
+  late final _new_dart_opaquePtr = _lookup<ffi.NativeFunction<ffi.UintPtr Function(ffi.Handle)>>('new_dart_opaque');
+  late final _new_dart_opaque = _new_dart_opaquePtr.asFunction<int Function(Object)>();
+
+  int init_frb_dart_api_dl(
+    ffi.Pointer<ffi.Void> obj,
+  ) {
+    return _init_frb_dart_api_dl(
+      obj,
+    );
+  }
+
+  late final _init_frb_dart_api_dlPtr =
+      _lookup<ffi.NativeFunction<ffi.IntPtr Function(ffi.Pointer<ffi.Void>)>>('init_frb_dart_api_dl');
+  late final _init_frb_dart_api_dl = _init_frb_dart_api_dlPtr.asFunction<int Function(ffi.Pointer<ffi.Void>)>();
+
+  void wire_platform(
+    int port_,
+  ) {
+    return _wire_platform(
+      port_,
+    );
+  }
+
+  late final _wire_platformPtr = _lookup<ffi.NativeFunction<ffi.Void Function(ffi.Int64)>>('wire_platform');
+  late final _wire_platform = _wire_platformPtr.asFunction<void Function(int)>();
+
+  void wire_rust_release_mode(
+    int port_,
+  ) {
+    return _wire_rust_release_mode(
+      port_,
+    );
+  }
+
+  late final _wire_rust_release_modePtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(ffi.Int64)>>('wire_rust_release_mode');
+  late final _wire_rust_release_mode = _wire_rust_release_modePtr.asFunction<void Function(int)>();
+
+  void free_WireSyncReturn(
+    WireSyncReturn ptr,
+  ) {
+    return _free_WireSyncReturn(
+      ptr,
+    );
+  }
+
+  late final _free_WireSyncReturnPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(WireSyncReturn)>>('free_WireSyncReturn');
+  late final _free_WireSyncReturn = _free_WireSyncReturnPtr.asFunction<void Function(WireSyncReturn)>();
+}
+
+final class _Dart_Handle extends ffi.Opaque {}
+
+typedef DartPostCObjectFnType
+    = ffi.Pointer<ffi.NativeFunction<ffi.Bool Function(DartPort port_id, ffi.Pointer<ffi.Void> message)>>;
+typedef DartPort = ffi.Int64;

mobile/lib/bridge_generated.io.dart

@@ -0,0 +1,169 @@
+// AUTO GENERATED FILE, DO NOT EDIT.
+// Generated by `flutter_rust_bridge`@ 1.81.0.
+// ignore_for_file: non_constant_identifier_names, unused_element, duplicate_ignore, directives_ordering, curly_braces_in_flow_control_structures, unnecessary_lambdas, slash_for_doc_comments, prefer_const_literals_to_create_immutables, implicit_dynamic_list_literal, duplicate_import, unused_import, unnecessary_import, prefer_single_quotes, prefer_const_constructors, use_super_parameters, always_use_package_imports, annotate_overrides, invalid_use_of_protected_member, constant_identifier_names, invalid_use_of_internal_member, prefer_is_empty, unnecessary_const
+
+import "bridge_definitions.dart";
+import 'dart:convert';
+import 'dart:async';
+import 'package:meta/meta.dart';
+import 'package:flutter_rust_bridge/flutter_rust_bridge.dart';
+import 'package:uuid/uuid.dart';
+import 'bridge_generated.dart';
+export 'bridge_generated.dart';
+import 'dart:ffi' as ffi;
+
+class NativePlatform extends FlutterRustBridgeBase<NativeWire> {
+  NativePlatform(ffi.DynamicLibrary dylib) : super(NativeWire(dylib));
+
+// Section: api2wire
+
+// Section: finalizer
+
+// Section: api_fill_to_wire
+}
+
+// ignore_for_file: camel_case_types, non_constant_identifier_names, avoid_positional_boolean_parameters, annotate_overrides, constant_identifier_names
+
+// AUTO GENERATED FILE, DO NOT EDIT.
+//
+// Generated by `package:ffigen`.
+// ignore_for_file: type=lint
+
+/// generated by flutter_rust_bridge
+class NativeWire implements FlutterRustBridgeWireBase {
+  @internal
+  late final dartApi = DartApiDl(init_frb_dart_api_dl);
+
+  /// Holds the symbol lookup function.
+  final ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName)
+      _lookup;
+
+  /// The symbols are looked up in [dynamicLibrary].
+  NativeWire(ffi.DynamicLibrary dynamicLibrary)
+      : _lookup = dynamicLibrary.lookup;
+
+  /// The symbols are looked up with [lookup].
+  NativeWire.fromLookup(
+      ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName)
+          lookup)
+      : _lookup = lookup;
+
+  void store_dart_post_cobject(
+    DartPostCObjectFnType ptr,
+  ) {
+    return _store_dart_post_cobject(
+      ptr,
+    );
+  }
+
+  late final _store_dart_post_cobjectPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(DartPostCObjectFnType)>>(
+          'store_dart_post_cobject');
+  late final _store_dart_post_cobject = _store_dart_post_cobjectPtr
+      .asFunction<void Function(DartPostCObjectFnType)>();
+
+  Object get_dart_object(
+    int ptr,
+  ) {
+    return _get_dart_object(
+      ptr,
+    );
+  }
+
+  late final _get_dart_objectPtr =
+      _lookup<ffi.NativeFunction<ffi.Handle Function(ffi.UintPtr)>>(
+          'get_dart_object');
+  late final _get_dart_object =
+      _get_dart_objectPtr.asFunction<Object Function(int)>();
+
+  void drop_dart_object(
+    int ptr,
+  ) {
+    return _drop_dart_object(
+      ptr,
+    );
+  }
+
+  late final _drop_dart_objectPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(ffi.UintPtr)>>(
+          'drop_dart_object');
+  late final _drop_dart_object =
+      _drop_dart_objectPtr.asFunction<void Function(int)>();
+
+  int new_dart_opaque(
+    Object handle,
+  ) {
+    return _new_dart_opaque(
+      handle,
+    );
+  }
+
+  late final _new_dart_opaquePtr =
+      _lookup<ffi.NativeFunction<ffi.UintPtr Function(ffi.Handle)>>(
+          'new_dart_opaque');
+  late final _new_dart_opaque =
+      _new_dart_opaquePtr.asFunction<int Function(Object)>();
+
+  int init_frb_dart_api_dl(
+    ffi.Pointer<ffi.Void> obj,
+  ) {
+    return _init_frb_dart_api_dl(
+      obj,
+    );
+  }
+
+  late final _init_frb_dart_api_dlPtr =
+      _lookup<ffi.NativeFunction<ffi.IntPtr Function(ffi.Pointer<ffi.Void>)>>(
+          'init_frb_dart_api_dl');
+  late final _init_frb_dart_api_dl = _init_frb_dart_api_dlPtr
+      .asFunction<int Function(ffi.Pointer<ffi.Void>)>();
+
+  void wire_platform(
+    int port_,
+  ) {
+    return _wire_platform(
+      port_,
+    );
+  }
+
+  late final _wire_platformPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(ffi.Int64)>>(
+          'wire_platform');
+  late final _wire_platform =
+      _wire_platformPtr.asFunction<void Function(int)>();
+
+  void wire_rust_release_mode(
+    int port_,
+  ) {
+    return _wire_rust_release_mode(
+      port_,
+    );
+  }
+
+  late final _wire_rust_release_modePtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(ffi.Int64)>>(
+          'wire_rust_release_mode');
+  late final _wire_rust_release_mode =
+      _wire_rust_release_modePtr.asFunction<void Function(int)>();
+
+  void free_WireSyncReturn(
+    WireSyncReturn ptr,
+  ) {
+    return _free_WireSyncReturn(
+      ptr,
+    );
+  }
+
+  late final _free_WireSyncReturnPtr =
+      _lookup<ffi.NativeFunction<ffi.Void Function(WireSyncReturn)>>(
+          'free_WireSyncReturn');
+  late final _free_WireSyncReturn =
+      _free_WireSyncReturnPtr.asFunction<void Function(WireSyncReturn)>();
+}
+
+final class _Dart_Handle extends ffi.Opaque {}
+
+typedef DartPostCObjectFnType = ffi.Pointer<
+    ffi.NativeFunction<
+        ffi.Bool Function(DartPort port_id, ffi.Pointer<ffi.Void> message)>>;
+typedef DartPort = ffi.Int64;

mobile/lib/ffi.dart

@@ -0,0 +1,18 @@
+// This file initializes the dynamic library and connects it with the stub
+// generated by flutter_rust_bridge_codegen.
+
+import 'dart:ffi';
+
+import 'bridge_generated.dart';
+import 'bridge_definitions.dart';
+export 'bridge_definitions.dart';
+
+// Re-export the bridge so it is only necessary to import this file.
+export 'bridge_generated.dart';
+import 'dart:io' as io;
+
+const _base = 'native';
+
+const _dylib = 'lib$_base.so';
+
+final Native api = NativeImpl(DynamicLibrary.open(_dylib));

mobile/lib/main.dart

@@ -0,0 +1,148 @@
+import 'package:flutter/material.dart';
+import 'ffi.dart' if (dart.library.html) 'ffi_web.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+      theme: ThemeData(
+        // This is the theme of your application.
+        //
+        // Try running your application with "flutter run". You'll see the
+        // application has a blue toolbar. Then, without quitting the app, try
+        // changing the primarySwatch below to Colors.green and then invoke
+        // "hot reload" (press "r" in the console where you ran "flutter run",
+        // or simply save your changes to "hot reload" in a Flutter IDE).
+        // Notice that the counter didn't reset back to zero; the application
+        // is not restarted.
+        primarySwatch: Colors.blue,
+      ),
+      home: const MyHomePage(title: 'Flutter Demo Home Page'),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({Key? key, required this.title}) : super(key: key);
+
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
+
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
+
+  final String title;
+
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  // These futures belong to the state and are only initialized once,
+  // in the initState method.
+  late Future<Platform> platform;
+  late Future<bool> isRelease;
+
+  @override
+  void initState() {
+    super.initState();
+    platform = api.platform();
+    isRelease = api.rustReleaseMode();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // This method is rerun every time setState is called.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
+    return Scaffold(
+      appBar: AppBar(
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
+        title: Text(widget.title),
+      ),
+      body: Center(
+        // Center is a layout widget. It takes a single child and positions it
+        // in the middle of the parent.
+        child: Column(
+          // Column is also a layout widget. It takes a list of children and
+          // arranges them vertically. By default, it sizes itself to fit its
+          // children horizontally, and tries to be as tall as its parent.
+          //
+          // Invoke "debug painting" (press "p" in the console, choose the
+          // "Toggle Debug Paint" action from the Flutter Inspector in Android
+          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
+          // to see the wireframe for each widget.
+          //
+          // Column has various properties to control how it sizes itself and
+          // how it positions its children. Here we use mainAxisAlignment to
+          // center the children vertically; the main axis here is the vertical
+          // axis because Columns are vertical (the cross axis would be
+          // horizontal).
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            const Text("You're running on"),
+            // To render the results of a Future, a FutureBuilder is used which
+            // turns a Future into an AsyncSnapshot, which can be used to
+            // extract the error state, the loading state and the data if
+            // available.
+            //
+            // Here, the generic type that the FutureBuilder manages is
+            // explicitly named, because if omitted the snapshot will have the
+            // type of AsyncSnapshot<Object?>.
+            FutureBuilder<List<dynamic>>(
+              // We await two unrelated futures here, so the type has to be
+              // List<dynamic>.
+              future: Future.wait([platform, isRelease]),
+              builder: (context, snap) {
+                final style = Theme.of(context).textTheme.headlineMedium;
+                if (snap.error != null) {
+                  // An error has been encountered, so give an appropriate response and
+                  // pass the error details to an unobstructive tooltip.
+                  debugPrint(snap.error.toString());
+                  return Tooltip(
+                    message: snap.error.toString(),
+                    child: Text('Unknown OS', style: style),
+                  );
+                }
+
+                // Guard return here, the data is not ready yet.
+                final data = snap.data;
+                if (data == null) return const CircularProgressIndicator();
+
+                // Finally, retrieve the data expected in the same order provided
+                // to the FutureBuilder.future.
+                final Platform platform = data[0];
+                final release = data[1] ? 'Release' : 'Debug';
+                final text = const {
+                      Platform.AndroidBish: 'Android, bish',
+                      Platform.Ios: 'iOS',
+                      Platform.MacApple: 'MacOS with Apple Silicon',
+                      Platform.MacIntel: 'MacOS',
+                      Platform.Windows: 'Windows',
+                      Platform.Unix: 'Unix',
+                      Platform.Wasm: 'the Web',
+                    }[platform] ??
+                    'Unknown OS';
+                return Text('$text ($release)', style: style);
+              },
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}

mobile/native/.rustfmt.toml

@@ -0,0 +1,4 @@
+imports_granularity = "Crate"
+group_imports = "StdExternalCrate"
+wrap_comments = true
+edition = "2021"

mobile/native/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "native"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate-type = ["cdylib", "lib"]
+
+[dependencies]
+anyhow = "1"
+flutter_rust_bridge = "1"

mobile/native/src/api.rs

@@ -0,0 +1,59 @@
+// This is the entry point of your Rust library.
+// When adding new code to your project, note that only items used
+// here will be transformed to their Dart equivalents.
+
+// A plain enum without any fields. This is similar to Dart- or C-style enums.
+// flutter_rust_bridge is capable of generating code for enums with fields
+// (@freezed classes in Dart and tagged unions in C).
+pub enum Platform {
+    Unknown,
+    AndroidBish,
+    Ios,
+    Windows,
+    Unix,
+    MacIntel,
+    MacApple,
+    Wasm,
+}
+
+// A function definition in Rust. Similar to Dart, the return type must always be named
+// and is never inferred.
+pub fn platform() -> Platform {
+    // This is a macro, a special expression that expands into code. In Rust, all macros
+    // end with an exclamation mark and can be invoked with all kinds of brackets (parentheses,
+    // brackets and curly braces). However, certain conventions exist, for example the
+    // vector macro is almost always invoked as vec![..].
+    //
+    // The cfg!() macro returns a boolean value based on the current compiler configuration.
+    // When attached to expressions (#[cfg(..)] form), they show or hide the expression at compile time.
+    // Here, however, they evaluate to runtime values, which may or may not be optimized out
+    // by the compiler. A variety of configurations are demonstrated here which cover most of
+    // the modern oeprating systems. Try running the Flutter application on different machines
+    // and see if it matches your expected OS.
+    //
+    // Furthermore, in Rust, the last expression in a function is the return value and does
+    // not have the trailing semicolon. This entire if-else chain forms a single expression.
+    if cfg!(windows) {
+        Platform::Windows
+    } else if cfg!(target_os = "android") {
+        Platform::AndroidBish
+    } else if cfg!(target_os = "ios") {
+        Platform::Ios
+    } else if cfg!(all(target_os = "macos", target_arch = "aarch64")) {
+        Platform::MacApple
+    } else if cfg!(target_os = "macos") {
+        Platform::MacIntel
+    } else if cfg!(target_family = "wasm") {
+        Platform::Wasm
+    } else if cfg!(unix) {
+        Platform::Unix
+    } else {
+        Platform::Unknown
+    }
+}
+
+// The convention for Rust identifiers is the snake_case,
+// and they are automatically converted to camelCase on the Dart side.
+pub fn rust_release_mode() -> bool {
+    cfg!(not(debug_assertions))
+}

mobile/native/src/bridge_generated.io.rs

@@ -0,0 +1,41 @@
+use super::*;
+// Section: wire functions
+
+#[no_mangle]
+pub extern "C" fn wire_platform(port_: i64) {
+    wire_platform_impl(port_)
+}
+
+#[no_mangle]
+pub extern "C" fn wire_rust_release_mode(port_: i64) {
+    wire_rust_release_mode_impl(port_)
+}
+
+// Section: allocate functions
+
+// Section: related functions
+
+// Section: impl Wire2Api
+
+// Section: wire structs
+
+// Section: impl NewWithNullPtr
+
+pub trait NewWithNullPtr {
+    fn new_with_null_ptr() -> Self;
+}
+
+impl<T> NewWithNullPtr for *mut T {
+    fn new_with_null_ptr() -> Self {
+        std::ptr::null_mut()
+    }
+}
+
+// Section: sync execution mode utility
+
+#[no_mangle]
+pub extern "C" fn free_WireSyncReturn(ptr: support::WireSyncReturn) {
+    unsafe {
+        let _ = support::box_from_leak_ptr(ptr);
+    };
+}

mobile/native/src/bridge_generated.rs

@@ -0,0 +1,101 @@
+#![allow(
+    non_camel_case_types,
+    unused,
+    clippy::redundant_closure,
+    clippy::useless_conversion,
+    clippy::unit_arg,
+    clippy::double_parens,
+    non_snake_case,
+    clippy::too_many_arguments
+)]
+// AUTO GENERATED FILE, DO NOT EDIT.
+// Generated by `flutter_rust_bridge`@ 1.81.0.
+
+use core::panic::UnwindSafe;
+use std::{ffi::c_void, sync::Arc};
+
+use flutter_rust_bridge::{rust2dart::IntoIntoDart, *};
+
+use crate::api::*;
+
+// Section: imports
+
+// Section: wire functions
+
+fn wire_platform_impl(port_: MessagePort) {
+    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, Platform>(
+        WrapInfo {
+            debug_name: "platform",
+            port: Some(port_),
+            mode: FfiCallMode::Normal,
+        },
+        move || move |task_callback| Ok(platform()),
+    )
+}
+fn wire_rust_release_mode_impl(port_: MessagePort) {
+    FLUTTER_RUST_BRIDGE_HANDLER.wrap::<_, _, _, bool>(
+        WrapInfo {
+            debug_name: "rust_release_mode",
+            port: Some(port_),
+            mode: FfiCallMode::Normal,
+        },
+        move || move |task_callback| Ok(rust_release_mode()),
+    )
+}
+// Section: wrapper structs
+
+// Section: static checks
+
+// Section: allocate functions
+
+// Section: related functions
+
+// Section: impl Wire2Api
+
+pub trait Wire2Api<T> {
+    fn wire2api(self) -> T;
+}
+
+impl<T, S> Wire2Api<Option<T>> for *mut S
+where
+    *mut S: Wire2Api<T>,
+{
+    fn wire2api(self) -> Option<T> {
+        (!self.is_null()).then(|| self.wire2api())
+    }
+}
+// Section: impl IntoDart
+
+impl support::IntoDart for Platform {
+    fn into_dart(self) -> support::DartAbi {
+        match self {
+            Self::Unknown => 0,
+            Self::AndroidBish => 1,
+            Self::Ios => 2,
+            Self::Windows => 3,
+            Self::Unix => 4,
+            Self::MacIntel => 5,
+            Self::MacApple => 6,
+            Self::Wasm => 7,
+        }
+        .into_dart()
+    }
+}
+impl support::IntoDartExceptPrimitive for Platform {}
+impl rust2dart::IntoIntoDart<Platform> for Platform {
+    fn into_into_dart(self) -> Self {
+        self
+    }
+}
+
+// Section: executor
+
+support::lazy_static! {
+    pub static ref FLUTTER_RUST_BRIDGE_HANDLER: support::DefaultHandler = Default::default();
+}
+
+#[cfg(not(target_family = "wasm"))]
+#[path = "bridge_generated.io.rs"]
+mod io;
+#[cfg(not(target_family = "wasm"))]
+pub use io::*;

mobile/native/src/lib.rs

@@ -0,0 +1,2 @@
+mod api;
+mod bridge_generated;

mobile/pubspec.yaml

@@ -0,0 +1,94 @@
+name: cuttle
+description: Optical data transfer with QR codes.
+
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+# The following defines the version and build number for your application.
+# A version number is three numbers separated by dots, like 1.2.43
+# followed by an optional build number separated by a +.
+# Both the version and the builder number may be overridden in flutter
+# build by specifying --build-name and --build-number, respectively.
+# In Android, build-name is used as versionName while build-number used as versionCode.
+# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
+# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
+# Read more about iOS versioning at
+# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
+version: 1.0.0+1
+
+environment:
+  sdk: ">=3.0.0 <4.0.0"
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^1.0.2
+  ffi: ^2.0.1
+  flutter_rust_bridge: ^1.45.0
+  meta: ^1.8.0
+  uuid: ^3.0.7
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^2.0.0
+  ffigen: ">=8.0.0 <9.0.0"
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter packages.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/assets-and-images/#from-packages
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/custom-fonts/#from-packages

mobile/test/widget_test.dart

@@ -0,0 +1,6 @@
+// import 'package:flutter/material.dart';
+// import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  // Your tests go here.
+}