diff --git a/packages/dubp_rs/.metadata b/packages/dubp_rs/.metadata
new file mode 100644
index 0000000000000000000000000000000000000000..4b7663f9efffd3a3b50fb615fb7fb1f1211bda9d
--- /dev/null
+++ b/packages/dubp_rs/.metadata
@@ -0,0 +1,10 @@
+# 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 and should not be manually edited.
+
+version:
+  revision: f7a6a7906be96d2288f5d63a5a54c515a6e987fe
+  channel: stable
+
+project_type: plugin
diff --git a/packages/dubp_rs/LICENSE b/packages/dubp_rs/LICENSE
new file mode 100644
index 0000000000000000000000000000000000000000..dba13ed2ddf783ee8118c6a581dbf75305f816a3
--- /dev/null
+++ b/packages/dubp_rs/LICENSE
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
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+ Everyone is permitted to copy and distribute verbatim copies
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.
diff --git a/packages/dubp_rs/README.md b/packages/dubp_rs/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..da955eb861635d7d971712bf3cecbbea1c969a79
--- /dev/null
+++ b/packages/dubp_rs/README.md
@@ -0,0 +1,120 @@
+# dubp
+
+Flutter package that bind [dubp-rs-libs] Rust crates.
+
+## Use
+
+You must execute this instruction at startup of your application:
+
+```dart
+DubpRust.setup();
+```
+
+### Generate a random Mnemonic
+
+#### Function signature
+
+```dart
+static Future<String> DubpRust.genMnemonic({Language language = Language.English});
+```
+
+#### Usage example
+
+```dart
+String mnemonic = await DubpRust.genMnemonic();
+```
+
+You can choose a language (English by default):
+
+```dart
+String mnemonic = await DubpRust.genMnemonic(language: Language.French);
+```
+
+### Generate a wallet
+
+#### Function signature
+
+```dart
+static Future<NewWallet> genWalletFromMnemonic({
+    String currency = "g1",
+    Language language = Language.English,
+    String mnemonic,
+    PinLength pinLength = PinLength.Six
+});
+```
+
+If the mnemonic is not in English, you must indicate the language of the mnemonic (necessary for the verification of its validity).
+If the wallet to be generated is not dedicated to the Äž1 currency, you must indicate the currency for which this wallet will be used.
+
+#### Usage example
+
+```dart
+NewWallet new_wallet = await DubpRust.genWalletFromMnemonic(
+    language: Language.English,
+    mnemonic: "tongue cute mail fossil great frozen same social weasel impact brush kind"
+);
+```
+
+You can choose a different length for the pin code (6 by default):
+
+```dart
+NewWallet new_wallet = await DubpRust.genWalletFromMnemonic(
+    language: Language.English,
+    mnemonic: "tongue cute mail fossil great frozen same social weasel impact brush kind",
+    pinLength: PinLength.Eight
+);
+```
+
+### Sign a message
+
+#### Function signature
+
+```dart
+static Future<String> sign({
+    String currency = "g1",
+    String dewif,
+    String pin,
+    String message
+});
+```
+
+If the wallet is not dedicated to the Äž1 currency, you must indicate the currency.
+
+#### Usage example
+
+```dart
+String signature = await DubpRust.sign(
+    dewif: "AAAAARAAAAGfFDAs+jVZYkfhBlHZZ2fEQIvBqnG16g5+02cY18wSOjW0cUg2JV3SUTJYN2CrbQeRDwGazWnzSFBphchMmiL0",
+    pin: "CDJ4UB",
+    message: "toto"
+);
+```
+
+### Change pin code
+
+You can change the pin code that encrypts the [DEWIF].
+
+#### Function signature
+
+```dart
+static Future<NewWallet> changeDewifPin({
+    String currency = "g1",
+    String dewif,
+    String oldPin,
+    PinLength newPinLength = PinLength.Six
+});
+```
+
+If the wallet is not dedicated to the Äž1 currency, you must indicate the currency.
+
+#### Usage example
+
+```dart
+NewWallet new_wallet = await DubpRust.changeDewifPin(
+    dewif: "AAAAARAAAAGfFDAs+jVZYkfhBlHZZ2fEQIvBqnG16g5+02cY18wSOjW0cUg2JV3SUTJYN2CrbQeRDwGazWnzSFBphchMmiL0",
+    oldPin: "CDJ4UB",
+);
+```
+
+[dubp-rs-libs]: https://git.duniter.org/libs/dubp-rs-libs
+[DEWIF]: https://git.duniter.org/documents/rfcs/blob/dewif/rfc/0013_Duniter_Encrypted_Wallet_Import_Format.md
diff --git a/packages/dubp_rs/analysis_options.yaml b/packages/dubp_rs/analysis_options.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..572b2c2ca29d166973478cb2f8693b421484da74
--- /dev/null
+++ b/packages/dubp_rs/analysis_options.yaml
@@ -0,0 +1,12 @@
+include: package:effective_dart/analysis_options.yaml
+
+analyzer:
+  exclude:
+    - lib/ffi.dart
+  strong-mode:
+    implicit-casts: false
+    implicit-dynamic: false
+
+linter:
+  rules:
+    omit_local_variable_types: false
diff --git a/packages/dubp_rs/android/.gitignore b/packages/dubp_rs/android/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..c6cbe562a42726ab875d51cb513723b234787300
--- /dev/null
+++ b/packages/dubp_rs/android/.gitignore
@@ -0,0 +1,8 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
diff --git a/packages/dubp_rs/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/packages/dubp_rs/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
new file mode 100644
index 0000000000000000000000000000000000000000..9f52030beb9f3daa8e2f61cc70be0ab977de398f
--- /dev/null
+++ b/packages/dubp_rs/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -0,0 +1,25 @@
+package io.flutter.plugins;
+
+import io.flutter.plugin.common.PluginRegistry;
+import com.example.dubp.DubpPlugin;
+
+/**
+ * Generated file. Do not edit.
+ */
+public final class GeneratedPluginRegistrant {
+  public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+    DubpPlugin.registerWith(registry.registrarFor("com.example.dubp.DubpPlugin"));
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
+  }
+}
diff --git a/packages/dubp_rs/android/build.gradle b/packages/dubp_rs/android/build.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..a11bf58d807529d9184311c74416fa2e344d0a85
--- /dev/null
+++ b/packages/dubp_rs/android/build.gradle
@@ -0,0 +1,43 @@
+group 'com.example.dubp'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    ext.kotlin_version = '1.3.50'
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 28
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+    defaultConfig {
+        minSdkVersion 16
+    }
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
diff --git a/packages/dubp_rs/android/gradle.properties b/packages/dubp_rs/android/gradle.properties
new file mode 100644
index 0000000000000000000000000000000000000000..38c8d4544ff1c4419409796aa6c1caee2c262ff7
--- /dev/null
+++ b/packages/dubp_rs/android/gradle.properties
@@ -0,0 +1,4 @@
+org.gradle.jvmargs=-Xmx1536M
+android.enableR8=true
+android.useAndroidX=true
+android.enableJetifier=true
diff --git a/packages/dubp_rs/android/gradle/wrapper/gradle-wrapper.properties b/packages/dubp_rs/android/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000000000000000000000000000000000000..01a286e96a21c04c821f96882dfeb281a5c24214
--- /dev/null
+++ b/packages/dubp_rs/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-5.6.2-all.zip
diff --git a/packages/dubp_rs/android/settings.gradle b/packages/dubp_rs/android/settings.gradle
new file mode 100644
index 0000000000000000000000000000000000000000..ae6f0f7a8cd87e65b319f97c4cc5313adb0f8b80
--- /dev/null
+++ b/packages/dubp_rs/android/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'dubp'
diff --git a/packages/dubp_rs/android/src/main/AndroidManifest.xml b/packages/dubp_rs/android/src/main/AndroidManifest.xml
new file mode 100644
index 0000000000000000000000000000000000000000..6206217b646270f73b9e2cd61c492aa7b7cd42de
--- /dev/null
+++ b/packages/dubp_rs/android/src/main/AndroidManifest.xml
@@ -0,0 +1,3 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.example.dubp">
+</manifest>
diff --git a/packages/dubp_rs/android/src/main/kotlin/com/example/dubp/DubpPlugin.kt b/packages/dubp_rs/android/src/main/kotlin/com/example/dubp/DubpPlugin.kt
new file mode 100644
index 0000000000000000000000000000000000000000..e0945fc854b421a824d312c7b7bba3da833550ca
--- /dev/null
+++ b/packages/dubp_rs/android/src/main/kotlin/com/example/dubp/DubpPlugin.kt
@@ -0,0 +1,53 @@
+package com.example.dubp
+
+import androidx.annotation.NonNull;
+
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler
+import io.flutter.plugin.common.MethodChannel.Result
+import io.flutter.plugin.common.PluginRegistry.Registrar
+
+/** DubpPlugin */
+public class DubpPlugin: FlutterPlugin, MethodCallHandler {
+  /// The MethodChannel that will the communication between Flutter and native Android
+  ///
+  /// This local reference serves to register the plugin with the Flutter Engine and unregister it
+  /// when the Flutter Engine is detached from the Activity
+  private lateinit var channel : MethodChannel
+
+  override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
+    channel = MethodChannel(flutterPluginBinding.getFlutterEngine().getDartExecutor(), "dubp")
+    channel.setMethodCallHandler(this);
+  }
+
+  // This static function is optional and equivalent to onAttachedToEngine. It supports the old
+  // pre-Flutter-1.12 Android projects. You are encouraged to continue supporting
+  // plugin registration via this function while apps migrate to use the new Android APIs
+  // post-flutter-1.12 via https://flutter.dev/go/android-project-migration.
+  //
+  // It is encouraged to share logic between onAttachedToEngine and registerWith to keep
+  // them functionally equivalent. Only one of onAttachedToEngine or registerWith will be called
+  // depending on the user's project. onAttachedToEngine or registerWith must both be defined
+  // in the same class.
+  companion object {
+    @JvmStatic
+    fun registerWith(registrar: Registrar) {
+      val channel = MethodChannel(registrar.messenger(), "dubp")
+      channel.setMethodCallHandler(DubpPlugin())
+    }
+  }
+
+  override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
+    if (call.method == "getPlatformVersion") {
+      result.success("Android ${android.os.Build.VERSION.RELEASE}")
+    } else {
+      result.notImplemented()
+    }
+  }
+
+  override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+    channel.setMethodCallHandler(null)
+  }
+}
diff --git a/packages/dubp_rs/ios/.gitignore b/packages/dubp_rs/ios/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..aa479fd3ce8a6914c7e3f0003901008259d50636
--- /dev/null
+++ b/packages/dubp_rs/ios/.gitignore
@@ -0,0 +1,37 @@
+.idea/
+.vagrant/
+.sconsign.dblite
+.svn/
+
+.DS_Store
+*.swp
+profile
+
+DerivedData/
+build/
+GeneratedPluginRegistrant.h
+GeneratedPluginRegistrant.m
+
+.generated/
+
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+
+xcuserdata
+
+*.moved-aside
+
+*.pyc
+*sync/
+Icon?
+.tags*
+
+/Flutter/Generated.xcconfig
+/Flutter/flutter_export_environment.sh
\ No newline at end of file
diff --git a/packages/dubp_rs/ios/Assets/.gitkeep b/packages/dubp_rs/ios/Assets/.gitkeep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/packages/dubp_rs/ios/Classes/DubpPlugin.h b/packages/dubp_rs/ios/Classes/DubpPlugin.h
new file mode 100644
index 0000000000000000000000000000000000000000..b0e2d33880c941e5cb91db2fd80f37cf9a749cc8
--- /dev/null
+++ b/packages/dubp_rs/ios/Classes/DubpPlugin.h
@@ -0,0 +1,4 @@
+#import <Flutter/Flutter.h>
+
+@interface DubpPlugin : NSObject<FlutterPlugin>
+@end
diff --git a/packages/dubp_rs/ios/Classes/DubpPlugin.m b/packages/dubp_rs/ios/Classes/DubpPlugin.m
new file mode 100644
index 0000000000000000000000000000000000000000..4144f90b500b964dcc287519cb905a12658a8dca
--- /dev/null
+++ b/packages/dubp_rs/ios/Classes/DubpPlugin.m
@@ -0,0 +1,15 @@
+#import "DubpPlugin.h"
+#if __has_include(<dubp/dubp-Swift.h>)
+#import <dubp/dubp-Swift.h>
+#else
+// Support project import fallback if the generated compatibility header
+// is not copied when this plugin is created as a library.
+// https://forums.swift.org/t/swift-static-libraries-dont-copy-generated-objective-c-header/19816
+#import "dubp-Swift.h"
+#endif
+
+@implementation DubpPlugin
++ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+  [SwiftDubpPlugin registerWithRegistrar:registrar];
+}
+@end
diff --git a/packages/dubp_rs/ios/Classes/SwiftDubpPlugin.swift b/packages/dubp_rs/ios/Classes/SwiftDubpPlugin.swift
new file mode 100644
index 0000000000000000000000000000000000000000..7108aa47834b4d4b314522ccf47c0ea97d78c1d1
--- /dev/null
+++ b/packages/dubp_rs/ios/Classes/SwiftDubpPlugin.swift
@@ -0,0 +1,18 @@
+import Flutter
+import UIKit
+
+public class SwiftDubpPlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let channel = FlutterMethodChannel(name: "dubp", binaryMessenger: registrar.messenger())
+    let instance = SwiftDubpPlugin()
+    registrar.addMethodCallDelegate(instance, channel: channel)
+  }
+
+  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+    result("iOS " + UIDevice.current.systemVersion)
+  }
+
+  public static func dummyMethodToEnforceBundling() {
+    last_error_length()
+  }
+}
diff --git a/packages/dubp_rs/ios/Classes/binding.h b/packages/dubp_rs/ios/Classes/binding.h
new file mode 100644
index 0000000000000000000000000000000000000000..b0207d74d9db102d6ede16bb67b9a4ab70822415
--- /dev/null
+++ b/packages/dubp_rs/ios/Classes/binding.h
@@ -0,0 +1,182 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/**
+ * A Dart_CObject is used for representing Dart objects as native C
+ * data outside the Dart heap. These objects are totally detached from
+ * the Dart heap. Only a subset of the Dart objects have a
+ * representation as a Dart_CObject.
+ *
+ * The string encoding in the 'value.as_string' is UTF-8.
+ *
+ * All the different types from dart:typed_data are exposed as type
+ * kTypedData. The specific type from dart:typed_data is in the type
+ * field of the as_typed_data structure. The length in the
+ * as_typed_data structure is always in bytes.
+ *
+ * The data for kTypedData is copied on message send and ownership remains with
+ * the caller. The ownership of data for kExternalTyped is passed to the VM on
+ * message send and returned when the VM invokes the
+ * Dart_WeakPersistentHandleFinalizer callback; a non-NULL callback must be
+ * provided.
+ */
+typedef struct DartCObject DartCObject;
+enum DartCObjectType
+#ifdef __cplusplus
+    : int32_t
+#endif // __cplusplus
+{
+  DartNull = 0,
+  DartBool = 1,
+  DartInt32 = 2,
+  DartInt64 = 3,
+  DartDouble = 4,
+  DartString = 5,
+  DartArray = 6,
+  DartTypedData = 7,
+  DartExternalTypedData = 8,
+  DartSendPort = 9,
+  DartCapability = 10,
+  DartUnsupported = 11,
+  DartNumberOfTypes = 12,
+};
+#ifndef __cplusplus
+typedef int32_t DartCObjectType;
+#endif // __cplusplus
+
+enum DartTypedDataType
+#ifdef __cplusplus
+    : int32_t
+#endif // __cplusplus
+{
+  kByteData = 0,
+  kInt8 = 1,
+  kUint8 = 2,
+  kUint8Clamped = 3,
+  kInt16 = 4,
+  kUint16 = 5,
+  kInt32 = 6,
+  kUint32 = 7,
+  kInt64 = 8,
+  kUint64 = 9,
+  kFloat32 = 10,
+  kFloat64 = 11,
+  kFloat32x4 = 12,
+  kInvalid = 13,
+};
+#ifndef __cplusplus
+typedef int32_t DartTypedDataType;
+#endif // __cplusplus
+
+typedef void *RuntimePtr;
+
+/**
+ * A port is used to send or receive inter-isolate messages
+ */
+typedef int64_t DartPort;
+
+typedef struct DartNativeSendPort
+{
+  DartPort id;
+  DartPort origin_id;
+} DartNativeSendPort;
+
+typedef struct DartNativeCapability
+{
+  int64_t id;
+} DartNativeCapability;
+
+typedef struct DartNativeArray
+{
+  intptr_t length;
+  DartCObject **values;
+} DartNativeArray;
+
+typedef struct DartNativeTypedData
+{
+  DartTypedDataType type_;
+  intptr_t length;
+  uint8_t *values;
+} DartNativeTypedData;
+
+typedef struct _DartWeakPersistentHandle
+{
+  uint8_t _unused[0];
+} _DartWeakPersistentHandle;
+
+typedef _DartWeakPersistentHandle *DartWeakPersistentHandle;
+
+typedef void (*DartWeakPersistentHandleFinalizer)(void *isolate_callback_data, DartWeakPersistentHandle handle, void *peer);
+
+typedef struct DartNativeExternalTypedData
+{
+  DartTypedDataType type_;
+  intptr_t length;
+  uint8_t *data;
+  void *peer;
+  DartWeakPersistentHandleFinalizer callback;
+} DartNativeExternalTypedData;
+
+typedef union DartCObjectValue {
+  bool as_bool;
+  int32_t as_int32;
+  int64_t as_int64;
+  double as_double;
+  char *as_string;
+  DartNativeSendPort as_send_port;
+  DartNativeCapability as_capability;
+  DartNativeArray as_array;
+  DartNativeTypedData as_typed_data;
+  DartNativeExternalTypedData as_external_typed_data;
+  uint64_t _bindgen_union_align[5];
+} DartCObjectValue;
+
+typedef struct DartCObject
+{
+  DartCObjectType type_;
+  DartCObjectValue value;
+} DartCObject;
+
+/**
+ *  Posts a message on some port. The message will contain the
+ *  Dart_CObject object graph rooted in 'message'.
+ *
+ *  While the message is being sent the state of the graph of
+ *  Dart_CObject structures rooted in 'message' should not be accessed,
+ *  as the message generation will make temporary modifications to the
+ *  data. When the message has been sent the graph will be fully
+ *  restored.
+ *
+ *  port_id The destination port.
+ *  message The message to send.
+ *
+ *  return true if the message was posted.
+ */
+typedef bool (*DartPostCObjectFnPtr)(DartPort port_id, DartCObject *message);
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif // __cplusplus
+
+  /**
+ * Destroy the Tokio Runtime, and return 1 if everything is okay
+ */
+  int32_t destroy_runtime(RuntimePtr runtime);
+
+  int32_t error_message_utf8(char *buf, int32_t length);
+
+  int32_t last_error_length(void);
+
+  int32_t load_page(RuntimePtr runtime, const char *url, DartPort port_id);
+
+  /**
+ * Setup a new Tokio Runtime and return a pointer to it so it could be used later to run tasks
+ */
+  RuntimePtr setup_runtime(DartPostCObjectFnPtr post_cobject);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus
diff --git a/packages/dubp_rs/ios/dubp.podspec b/packages/dubp_rs/ios/dubp.podspec
new file mode 100644
index 0000000000000000000000000000000000000000..459e34bf0e3c0e6a11ab69ee7abaaab7b9c6a00c
--- /dev/null
+++ b/packages/dubp_rs/ios/dubp.podspec
@@ -0,0 +1,26 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint dubp.podspec' to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'dubp'
+  s.version          = '0.0.1'
+  s.summary          = 'A new flutter plugin project.'
+  s.description      = <<-DESC
+A new flutter plugin project.
+                       DESC
+  s.homepage         = 'http://example.com'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+  s.source           = { :path => '.' }
+  s.public_header_files = 'Classes**/*.h'
+  s.source_files = 'Classes/**/*'
+  s.static_framework = true
+  s.vendored_libraries = "**/*.a"
+  s.dependency 'Flutter'
+  s.platform = :ios, '8.0'
+
+  # Flutter.framework does not contain a i386 slice. Only x86_64 simulators are supported.
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'VALID_ARCHS[sdk=iphonesimulator*]' => 'x86_64' }
+  s.swift_version = '5.0'
+end
diff --git a/packages/dubp_rs/lib/dubp.dart b/packages/dubp_rs/lib/dubp.dart
new file mode 100644
index 0000000000000000000000000000000000000000..f0d2336dc3efec523cbfda47bee30fc3f7a96397
--- /dev/null
+++ b/packages/dubp_rs/lib/dubp.dart
@@ -0,0 +1,266 @@
+import 'dart:async';
+import 'dart:ffi';
+import 'package:ffi/ffi.dart';
+import 'package:isolate/ports.dart';
+
+import 'ffi.dart' as native;
+
+/// Language
+enum Language {
+  /// English
+  english,
+
+  /// French
+  french,
+}
+
+/// New wallet
+class NewWallet {
+  /// DEWIF: Encrypted wallet
+  String dewif;
+
+  /// Pin code
+  String pin;
+
+  /// Public key
+  String publicKey;
+
+  NewWallet._(this.dewif, this.pin, this.publicKey);
+}
+
+/// Pin code length
+enum PinLength {
+  /// 6 characters
+  six,
+
+  /// 8 characters
+  eight,
+
+  /// 10 characters
+  ten,
+}
+
+/// DUBP Rust utilities
+///
+/// All the functions of this package are static methods of this
+/// class `DubpRust`.
+class DubpRust {
+  /// Must be called only once at the start of your application.
+  static void setup() {
+    native.store_dart_post_cobject(NativeApi.postCObject);
+    print("Dubp Setup Done");
+  }
+
+  /// Generate a random mnemonic
+  static Future<String> genMnemonic({Language language = Language.english}) {
+    final completer = Completer<String>();
+    final sendPort = singleCompletePort<String, String>(completer);
+    final res = native.gen_mnemonic(
+      sendPort.nativePort,
+      language.index,
+    );
+    if (res != 1) {
+      _throwError();
+    }
+    return completer.future;
+  }
+
+  static Future<String> _genPin(PinLength pinLength) {
+    final completer = Completer<String>();
+    final sendPort = singleCompletePort<String, String>(completer);
+    switch (pinLength) {
+      case PinLength.ten:
+        final res = native.gen_pin10(
+          sendPort.nativePort,
+        );
+        if (res != 1) {
+          DubpRust._throwError();
+        }
+        break;
+      case PinLength.eight:
+        final res = native.gen_pin8(
+          sendPort.nativePort,
+        );
+        if (res != 1) {
+          DubpRust._throwError();
+        }
+        break;
+      case PinLength.six:
+      default:
+        final res = native.gen_pin6(
+          sendPort.nativePort,
+        );
+        if (res != 1) {
+          DubpRust._throwError();
+        }
+        break;
+    }
+    return completer.future;
+  }
+
+  /// Change the pin code that encrypts the `dewif` keypair.
+  static Future<NewWallet> changeDewifPin(
+      {String currency = "g1",
+      String dewif,
+      String oldPin,
+      PinLength newPinLength = PinLength.six}) async {
+    // pin
+    String newPin = await _genPin(newPinLength);
+    // dewif
+    String newDewif;
+    {
+      final completer = Completer<String>();
+      final sendPort = singleCompletePort<String, String>(completer);
+      final res = native.change_dewif_pin(
+        sendPort.nativePort,
+        Utf8.toUtf8(currency),
+        Utf8.toUtf8(dewif),
+        Utf8.toUtf8(oldPin),
+        Utf8.toUtf8(newPin),
+      );
+      if (res != 1) {
+        DubpRust._throwError();
+      }
+      newDewif = await completer.future;
+    }
+    // publicKey
+    String publicKey;
+    {
+      final completer = Completer<String>();
+      final sendPort = singleCompletePort<String, String>(completer);
+      final res = native.get_dewif_pubkey(
+        sendPort.nativePort,
+        Utf8.toUtf8(currency),
+        Utf8.toUtf8(newDewif),
+        Utf8.toUtf8(newPin),
+      );
+      if (res != 1) {
+        _throwError();
+      }
+      publicKey = await completer.future;
+    }
+
+    return Future.value(NewWallet._(newDewif, newPin, publicKey));
+  }
+
+  /// Generate a wallet from a mnemonic phrase.
+  ///
+  /// If the mnemonic is not in English, you must indicate the language of
+  /// the mnemonic (necessary for the verification of its validity).
+  ///
+  /// If the wallet to be generated is not dedicated to the Äž1 currency, you
+  /// must indicate the currency for which this wallet will be used.
+  static Future<NewWallet> genWalletFromMnemonic(
+      {String currency = "g1",
+      Language language = Language.english,
+      String mnemonic,
+      PinLength pinLength = PinLength.six}) async {
+    // pin
+    String pin = await _genPin(pinLength);
+    // publicKey
+    String publicKey;
+    {
+      final completer = Completer<String>();
+      final sendPort = singleCompletePort<String, String>(completer);
+      final res = native.mnemonic_to_pubkey(
+        sendPort.nativePort,
+        language.index,
+        Utf8.toUtf8(mnemonic),
+      );
+      if (res != 1) {
+        DubpRust._throwError();
+      }
+      publicKey = await completer.future;
+    }
+    // dewif
+    String dewif;
+    {
+      final completer = Completer<String>();
+      final sendPort = singleCompletePort<String, String>(completer);
+      final res = native.gen_dewif(
+        sendPort.nativePort,
+        Utf8.toUtf8(currency),
+        language.index,
+        Utf8.toUtf8(mnemonic),
+        Utf8.toUtf8(pin),
+      );
+      if (res != 1) {
+        DubpRust._throwError();
+      }
+      dewif = await completer.future;
+    }
+    return Future.value(NewWallet._(dewif, pin, publicKey));
+  }
+
+  /// Get pulblic key (in base 58) of `dewif` keypair.
+  static Future<String> getDewifPublicKey(
+      {String currency = "g1", String dewif, String pin}) {
+    final completer = Completer<String>();
+    final sendPort = singleCompletePort<String, String>(completer);
+    final res = native.get_dewif_pubkey(
+      sendPort.nativePort,
+      Utf8.toUtf8(currency),
+      Utf8.toUtf8(dewif),
+      Utf8.toUtf8(pin),
+    );
+    if (res != 1) {
+      _throwError();
+    }
+    return completer.future;
+  }
+
+  /// Sign the message `message` with `dewif` keypair encryted in DEWIF format.
+  ///
+  /// If you have several messages to sign, use `signSeveral` method instead.
+  static Future<String> sign(
+      {String currency = "g1", String dewif, String pin, String message}) {
+    final completer = Completer<String>();
+    final sendPort = singleCompletePort<String, String>(completer);
+    final res = native.sign(
+      sendPort.nativePort,
+      Utf8.toUtf8(currency),
+      Utf8.toUtf8(dewif),
+      Utf8.toUtf8(pin),
+      Utf8.toUtf8(message),
+    );
+    if (res != 1) {
+      _throwError();
+    }
+    return completer.future;
+  }
+
+  /// Sign several messages `messages` with `dewif` keypair encryted in DEWIF
+  /// format.
+  ///
+  /// This method is optimized to sign several messages at once. If you have
+  /// several messages to sign, avoid calling the `sign` method for each
+  /// message. Use this `signSeveral` method instead.
+  static Future<List<String>> signSeveral(
+      {String currency = "g1",
+      String dewif,
+      String pin,
+      List<String> messages}) {
+    final completer = Completer<List<String>>();
+    final sendPort = singleCompletePort<List<String>, List<String>>(completer);
+    final res = native.sign_several(
+      sendPort.nativePort,
+      Utf8.toUtf8(currency),
+      Utf8.toUtf8(dewif),
+      Utf8.toUtf8(pin),
+      Utf8.toUtf8(messages.join('\n\t\n')),
+    );
+    if (res != 1) {
+      _throwError();
+    }
+    return completer.future;
+  }
+
+  static void _throwError() {
+    final length = native.last_error_length();
+    final Pointer<Utf8> message = allocate(count: length);
+    native.error_message_utf8(message, length);
+    final error = Utf8.fromUtf8(message);
+    print(error);
+    throw error;
+  }
+}
diff --git a/packages/dubp_rs/pubspec.lock b/packages/dubp_rs/pubspec.lock
new file mode 100644
index 0000000000000000000000000000000000000000..37fe0206ac586384d95cb0e4b3f94322e23c8597
--- /dev/null
+++ b/packages/dubp_rs/pubspec.lock
@@ -0,0 +1,168 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.5.0-nullsafety.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0-nullsafety.1"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0-nullsafety.3"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0-nullsafety.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0-nullsafety.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.15.0-nullsafety.3"
+  effective_dart:
+    dependency: "direct dev"
+    description:
+      name: effective_dart
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0-nullsafety.1"
+  ffi:
+    dependency: "direct main"
+    description:
+      name: ffi
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  isolate:
+    dependency: "direct main"
+    description:
+      name: isolate
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.3"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.10-nullsafety.1"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0-nullsafety.3"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0-nullsafety.1"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0-nullsafety.2"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.10.0-nullsafety.1"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0-nullsafety.1"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0-nullsafety.1"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0-nullsafety.1"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.19-nullsafety.2"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0-nullsafety.3"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0-nullsafety.3"
+sdks:
+  dart: ">=2.10.0-110 <2.11.0"
+  flutter: ">=1.10.0"
diff --git a/packages/dubp_rs/pubspec.yaml b/packages/dubp_rs/pubspec.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..e640dcec83fbd052661b7b3e81b66355cc989f51
--- /dev/null
+++ b/packages/dubp_rs/pubspec.yaml
@@ -0,0 +1,27 @@
+name: dubp
+description: dubp-rs-libs binding for flutter.
+version: 0.0.1
+
+environment:
+  sdk: '>=2.7.0 <3.0.0'
+  flutter: '>=1.10.0'
+
+dependencies:
+  flutter:
+    sdk: flutter
+  ffi: ^0.1.3
+  isolate: ^2.0.3
+
+dev_dependencies:
+  effective_dart: ^1.0.0
+  flutter_test:
+    sdk: flutter
+
+flutter:
+  plugin:
+    platforms:
+      android:
+        package: com.example.dubp
+        pluginClass: DubpPlugin
+      ios:
+        pluginClass: DubpPlugin