Documentation and serialization

degeon/src/chat.rs

@@ -5,17 +5,26 @@ use crate::gui_events::GuiEvent;
 use crate::message::{DegMessage, DegMessageContent, Profile};
 use crate::state;
 use crate::styles::style;
+use serde::{Serialize, Deserialize};
 
-#[derive(Clone, Debug)]
+
+/// A chat in the messenger
+#[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct Chat {
+    /// Public key of the other user
     pub pkey: PublicKey,
+    /// Messages in this chat
     pub messages: Vec<DegMessage>,
+    /// Profile of the other user
     pub profile: Profile,
+    /// Scroll position
     pub scrolled: f32,
+    /// Message in the field
     pub input: String,
 }
 
 impl Chat {
+    /// Create a new chat
     pub fn new(pkey: PublicKey) -> Self {
         Self {
             pkey,
@@ -28,6 +37,7 @@ impl Chat {
 }
 
 impl Chat {
+    /// Render header of the chat
     pub fn header<'a>(name: String) -> Element<'a, GuiEvent> {
         iced::container::Container::new(Text::new(name.as_str()).color(iced::Color::WHITE))
             .style(style::Container::Primary)
@@ -37,6 +47,7 @@ impl Chat {
             .into()
     }
 
+    /// Render the sending field
     pub fn send_field<'a>(
         input: String,
         text_input_state: &'a mut iced::text_input::State,
@@ -64,6 +75,7 @@ impl Chat {
             .into()
     }
 
+    /// Render chat preview
     pub fn preview<'a>(
         &'a self,
         state: &'a mut button::State,
@@ -82,6 +94,7 @@ impl Chat {
             .into()
     }
 
+    /// Render the chat view
     pub fn view<'a>(
         &'a self,
         text_input_state: &'a mut iced::text_input::State,
@@ -110,6 +123,7 @@ impl Chat {
             .into()
     }
 
+    /// Create an example chat
     pub fn example(i: usize, my_keys: &Keys) -> Chat {
         let pkey = Keys::generate().get_public();
         Self {

degeon/src/degeon_worker.rs

@@ -7,24 +7,46 @@ use ironforce::{IronForce, Keys, Message, MessageType, PublicKey};
 use std::pin::Pin;
 use std::sync::{Arc, Mutex};
 use std::task::{Context, Poll};
+use serde::{Serialize, Deserialize};
 
+/// The container for logic, data, IF and protocol interactions
 #[derive(Clone)]
 pub struct Degeon {
+    /// The list of all chats for this instance
     pub chats: Vec<Chat>,
-    pub my_name: String,
+    /// Profile of this user
+    pub profile: Profile,
+    /// Keys of this user
     pub keys: Keys,
+    /// The IF worker
     pub ironforce: Arc<Mutex<IronForce>>,
 }
 
+/// Data for serialization
+#[derive(Serialize, Deserialize)]
+pub struct DegeonData {
+    pub chats: Vec<Chat>,
+    pub profile: Profile,
+    pub keys: Keys,
+}
+
+/// Load IF and launch the main loop
+///
+/// Returns ironforce and keys
+fn get_initialized_ironforce() -> (Arc<Mutex<IronForce>>, Keys) {
+    let ironforce = IronForce::from_file("".to_string()).unwrap();
+    let keys = ironforce.keys.clone();
+    println!("ID: {}", keys.get_public().get_short_id());
+    let (_thread, ironforce) = ironforce.launch_main_loop(1000);
+    (ironforce, keys)
+}
+
 impl Default for Degeon {
     fn default() -> Self {
-        let ironforce = IronForce::from_file("".to_string()).unwrap();
-        let keys = ironforce.keys.clone();
-        println!("ID: {}", keys.get_public().get_short_id());
-        let (_thread, ironforce) = ironforce.launch_main_loop(1000);
+        let (ironforce, keys) = get_initialized_ironforce();
         Self {
             chats: vec![],
-            my_name: "".to_string(),
+            profile: Profile::default(),
             keys,
             ironforce,
         }
@@ -32,16 +54,17 @@ impl Default for Degeon {
 }
 
 impl Degeon {
+    /// Get profile for the current user
     pub fn get_profile(&self) -> Profile {
-        Profile {
-            name: self.my_name.clone(),
-        }
+        self.profile.clone()
     }
 
+    /// Find a chat in the list for a given public key
     pub fn chat_with(&self, pkey: &PublicKey) -> Option<usize> {
         self.chats.iter().position(|chat| &chat.pkey == pkey)
     }
 
+    /// Process the incoming message and act accordingly
     pub fn process_message(&self, msg: ironforce::Message) -> IFResult<Option<GuiEvent>> {
         let deg_msg: ProtocolMsg =
             match serde_json::from_slice(msg.get_decrypted(&self.keys)?.as_slice()) {
@@ -49,7 +72,11 @@ impl Degeon {
                 Err(_) => return Ok(None),
             };
         let sender = msg.get_sender(&self.keys).unwrap();
-        println!("check_rec: {:?}, sender==self: {:?}", msg.check_recipient(&self.keys), sender == self.keys.get_public());
+        println!(
+            "check_rec: {:?}, sender==self: {:?}",
+            msg.check_recipient(&self.keys),
+            sender == self.keys.get_public()
+        );
         if !msg.check_recipient(&self.keys) || sender == self.keys.get_public() {
             return Ok(None);
         }
@@ -65,6 +92,7 @@ impl Degeon {
         })
     }
 
+    /// Send a multicast message through the network
     pub fn send_multicast(&self, msg: ProtocolMsg) -> IFResult<()> {
         self.ironforce.lock().unwrap().send_to_all(
             Message::build()
@@ -75,6 +103,7 @@ impl Degeon {
         )
     }
 
+    /// Send a message to a target through the network
     pub fn send_message(&self, msg: ProtocolMsg, target: &PublicKey) -> IFResult<()> {
         // if self.ironforce.lock().unwrap().get_tunnel(target).is_none() {
         //     println!("Creating a tunnel");
@@ -101,13 +130,14 @@ impl Degeon {
         )
     }
 
+    /// Created an iced command that sends a message to a target
     pub fn get_send_command(
         &self,
         msg: ProtocolMsg,
         target: &PublicKey,
     ) -> iced::Command<GuiEvent> {
         let if_clone = self.ironforce.clone();
-        let target = target.clone();
+        let _target = target.clone();
         let keys = self.keys.clone();
 
         println!("Creating a send command: {:?}", msg);
@@ -120,6 +150,7 @@ impl Degeon {
                     Message::build()
                         .message_type(MessageType::Broadcast)
                         .content(serde_json::to_vec(&msg).unwrap())
+                        // todo:
                         // .recipient(&target)
                         .sign(&keys)
                         .build()
@@ -130,6 +161,8 @@ impl Degeon {
         })
     }
 
+    /// Create an iced command that sends a message through the network to a target
+    #[allow(dead_code)]
     pub fn get_send_multicast_command(&self, msg: ProtocolMsg) -> iced::Command<GuiEvent> {
         let keys = self.keys.clone();
         let if_clone = self.ironforce.clone();
@@ -155,17 +188,84 @@ impl Degeon {
     }
 }
 
+const DEFAULT_FILENAME: &str = ".degeon.json";
+
+impl Degeon {
+    /// Store most of the necessary data to string
+    pub fn serialize_to_string(&self) -> serde_json::Result<String> {
+        let data = DegeonData {
+            chats: self.chats.clone(),
+            profile: self.get_profile(),
+            keys: self.keys.clone(),
+        };
+        serde_json::to_string(&data)
+    }
+
+    /// Restore `Degeon` from serialized data
+    pub fn restore_from_string(data: String) -> IFResult<Self> {
+        let data_res: serde_json::Result<DegeonData> = serde_json::from_str(data.as_str());
+        let data = match data_res {
+            Ok(r) => r,
+            Err(_) => return Ok(Self::default()),
+        };
+        let (ironforce, _keys) = get_initialized_ironforce();
+        ironforce.lock().unwrap().keys = data.keys.clone();
+        let deg = Degeon {
+            chats: data.chats,
+            profile: data.profile,
+            keys: data.keys,
+            ironforce
+        };
+        Ok(deg)
+    }
+
+    /// Save to a file. If no filename is provided, the default is used
+    pub fn save_to_file(&self, filename: String) -> IFResult<()> {
+        let data = self.serialize_to_string()?;
+        let filename = if filename.is_empty() {
+            DEFAULT_FILENAME.to_string()
+        } else {
+            filename
+        };
+        std::fs::write(filename, data)?;
+        Ok(())
+    }
+
+    /// Restore from a file. If no filename is provided, the default is used
+    pub fn restore_from_file(filename: String) -> IFResult<Self> {
+        let filename = if filename.is_empty() {
+            DEFAULT_FILENAME.to_string()
+        } else {
+            filename
+        };
+        let content = std::fs::read_to_string(filename).unwrap_or_default();
+        Self::restore_from_string(content)
+    }
+}
+
 impl Stream for Degeon {
     type Item = GuiEvent;
 
     fn poll_next(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
         let timestamp_0 = std::time::Instant::now();
         let msg_raw = self.ironforce.lock().unwrap().read_message();
-        let msg = msg_raw.as_ref().map(|msg| self.process_message(msg.clone()).unwrap());
+        let msg = msg_raw
+            .as_ref()
+            .map(|msg| self.process_message(msg.clone()).unwrap());
         if msg_raw.is_some() {
-            let msg_deg: ProtocolMsg = match serde_json::from_slice(msg_raw.as_ref().unwrap().get_decrypted(&self.keys).unwrap().as_slice()) {
+            let msg_deg: ProtocolMsg = match serde_json::from_slice(
+                msg_raw
+                    .as_ref()
+                    .unwrap()
+                    .get_decrypted(&self.keys)
+                    .unwrap()
+                    .as_slice(),
+            ) {
                 Ok(r) => r,
-                Err(_) => {println!("Couldn't deserialize {:?}", msg_raw); return Poll::Ready(Some(GuiEvent::None))}
+                Err(_) => {
+                    println!("Couldn't deserialize {:?}", msg_raw);
+                    return Poll::Ready(Some(GuiEvent::None));
+                }
             };
             println!("{:?} -> {:?}", msg_deg, msg);
         }

degeon/src/gui_events.rs

@@ -1,5 +1,6 @@
 use crate::message::{DegMessage, Profile};
 use ironforce::PublicKey;
+use crate::state::AppScreen;
 
 /// An enum with all possible events for this application
 #[derive(Clone, Debug)]
@@ -10,14 +11,14 @@ pub enum GuiEvent {
     Typed(String),
     /// The user clicked "Send"
     SendMessage,
-    /// New chat shall be created because we have an incoming request
-    NewChat(PublicKey),
     /// A new messaged arrived
     NewMessageInChat(PublicKey, DegMessage),
     /// A profile response arrived and we should store it
     SetProfile(PublicKey, Profile),
     /// We should send profile (in response to profile request)
     WeHaveToSendProfile(PublicKey),
+    /// Go to another screen
+    ChangeScreen(AppScreen),
     /// Nothing happened
     None,
 }

degeon/src/main.rs

@@ -7,13 +7,8 @@ mod styles;
 mod degeon_worker;
 
 use iced::Application;
-use ironforce::res::IFResult;
-use ironforce::{IronForce, Message, MessageType, PublicKey};
 use crate::state::DegeonApp;
 
-
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    // let ironforce = IronForce::from_file("".to_string()).unwrap();
-    // let _if_keys = ironforce.keys.clone();
     Ok(DegeonApp::run(iced::Settings::default())?)
 }

degeon/src/message.rs

@@ -1,6 +1,7 @@
 use ironforce::PublicKey;
 use serde::{Deserialize, Serialize};
 
+/// A message in the messenger
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct DegMessage {
     pub sender: PublicKey,
@@ -9,6 +10,7 @@ pub struct DegMessage {
 }
 
 impl DegMessage {
+    /// Create a simple text message
     pub fn new_text(text: String, my_key: &PublicKey) -> DegMessage {
         Self {
             sender: my_key.clone(),
@@ -18,6 +20,7 @@ impl DegMessage {
     }
 }
 
+/// The content of the message
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub enum DegMessageContent {
     Text(String),
@@ -25,15 +28,21 @@ pub enum DegMessageContent {
     Service,
 }
 
-#[derive(Clone, Debug, Serialize, Deserialize)]
+/// User's profile
+#[derive(Clone, Debug, Serialize, Deserialize, Default)]
 pub struct Profile {
     pub name: String,
 }
 
+/// A protocol message (that's sent through IF)
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub enum ProtocolMsg {
+    /// Requesting profile
     ProfileRequest,
+    /// Responding to the profile request with a profile
     ProfileResponse(Profile),
+    /// A peer discovery
     Ping,
+    /// A message is sent
     NewMessage(DegMessage),
 }

degeon/src/state.rs

@@ -1,21 +1,18 @@
 use crate::chat::Chat;
 use crate::degeon_worker::Degeon;
 use crate::gui_events::GuiEvent;
-use crate::message::{DegMessage, DegMessageContent, Profile, ProtocolMsg};
+use crate::message::{DegMessage, DegMessageContent, ProtocolMsg};
 use crate::styles::style;
 use core::default::Default;
-use futures::Stream;
+use iced::window::Mode;
 use iced::{
-    button, Align, Application, Button, Column, Element, HorizontalAlignment, Length, Row, Text,
-    TextInput, VerticalAlignment,
+    button, Align, Application, Button, Color, Column, Element, HorizontalAlignment, Length, Row,
+    Settings, Text, TextInput, VerticalAlignment,
 };
 use ironforce::res::{IFError, IFResult};
-use ironforce::{IronForce, Keys, Message, MessageType, PublicKey};
-use std::hash::Hash;
-use std::pin::Pin;
-use std::sync::{Arc, Mutex};
-use std::task::{Context, Poll};
+use ironforce::PublicKey;
 
+/// Render a message into an iced `Element`
 pub fn view_message(msg: &DegMessage, pkey: PublicKey) -> Option<Element<GuiEvent>> {
     let is_from_me = pkey != msg.sender;
     match &msg.content {
@@ -44,18 +41,44 @@ pub fn view_message(msg: &DegMessage, pkey: PublicKey) -> Option<Element<GuiEven
     }
 }
 
+/// The screens (pages) of the app
+#[derive(Copy, Clone, Debug)]
+pub enum AppScreen {
+    /// The one with the chats
+    Main,
+    /// Settings and profile
+    ProfileEditor,
+    /// The screen that appears if no peers are available and asks for the IP address of at least one peer
+    PeerInput,
+}
+
+impl Default for AppScreen {
+    fn default() -> Self {
+        AppScreen::Main
+    }
+}
+
+/// The main application struct (for iced)
 #[derive(Default)]
 pub struct DegeonApp {
+    /// The container for logic, data and IF
     pub data: Degeon,
+    /// Current screen
+    screen: AppScreen,
+    /// Selected chat (on the main screen)
     selected_chat: usize,
+    /// Send button
     send_button_state: iced::button::State,
+    /// Message input field
     text_input_state: iced::text_input::State,
+    /// Buttons for chat previews
     preview_button_states: Vec<button::State>,
 }
 
 impl DegeonApp {
+    /// Render the list of chats with all previews
     fn chat_list<'a>(
-        chats: &'a Vec<Chat>,
+        chats: &'a [Chat],
         preview_button_states: &'a mut Vec<button::State>,
         selected: usize,
     ) -> Element<'a, GuiEvent> {
@@ -77,8 +100,9 @@ impl DegeonApp {
         .into()
     }
 
+    /// Render active chat section
     pub fn active_chat<'a>(
-        chats: &'a Vec<Chat>,
+        chats: &'a [Chat],
         selected_chat: usize,
         send_button_state: &'a mut button::State,
         text_input_state: &'a mut iced::text_input::State,
@@ -95,20 +119,52 @@ impl DegeonApp {
     }
 }
 
+impl DegeonApp {
+    fn main_view(&mut self) -> Element<GuiEvent> {
+        let Self {
+            data: Degeon { chats, .. },
+            selected_chat,
+            send_button_state,
+            text_input_state,
+            preview_button_states,
+            ..
+        } = self;
+        Row::new()
+            .padding(20)
+            .push(Self::chat_list(
+                chats,
+                preview_button_states,
+                *selected_chat,
+            ))
+            .push(Self::active_chat(
+                chats,
+                *selected_chat,
+                send_button_state,
+                text_input_state,
+            ))
+            .height(Length::Fill)
+            .into()
+    }
+}
+
 impl Application for DegeonApp {
     type Executor = iced::executor::Default;
     type Message = GuiEvent;
     type Flags = ();
 
     fn new(_: ()) -> (Self, iced::Command<GuiEvent>) {
-        let mut st = Self::default();
-        st.data.chats = vec![
-            Chat::example(1, &st.data.keys),
-            Chat::example(2, &st.data.keys),
-        ];
-        st.preview_button_states = vec![Default::default(), Default::default()];
-        st.data.my_name = "John".to_string();
-        st.data.send_multicast(ProtocolMsg::Ping).unwrap();
+        let mut data = Degeon::restore_from_file("".to_string()).unwrap();
+        data.chats = vec![Chat::example(1, &data.keys), Chat::example(2, &data.keys)];
+        data.profile.name = "John".to_string();
+        data.send_multicast(ProtocolMsg::Ping).unwrap();
+        let st = DegeonApp {
+            data,
+            screen: Default::default(),
+            selected_chat: 0,
+            send_button_state: Default::default(),
+            text_input_state: Default::default(),
+            preview_button_states: vec![Default::default(), Default::default()],
+        };
         let data_clone = st.data.clone();
         std::thread::spawn(move || {
             std::thread::sleep(std::time::Duration::from_secs(10));
@@ -142,19 +198,20 @@ impl Application for DegeonApp {
                     .push(new_msg.clone());
                 let data_cloned = self.data.clone();
                 let target = self.data.chats[self.selected_chat].pkey.clone();
-                std::thread::spawn(move || data_cloned.send_message(ProtocolMsg::NewMessage(new_msg), &target).unwrap());
-            }
-            GuiEvent::NewChat(pkey) => {
-                if self.data.chat_with(&pkey).is_none() {
-                    self.data.chats.push(Chat::new(pkey))
-                }
+                std::thread::spawn(move || {
+                    data_cloned
+                        .send_message(ProtocolMsg::NewMessage(new_msg), &target)
+                        .unwrap()
+                });
+                self.data.save_to_file("".to_string()).unwrap();
             }
             GuiEvent::NewMessageInChat(pkey, msg) => {
                 if self.data.chat_with(&pkey).is_none() {
                     self.data.chats.push(Chat::new(pkey.clone()))
                 }
                 let ind = self.data.chat_with(&pkey).unwrap();
-                self.data.chats[ind].messages.push(msg)
+                self.data.chats[ind].messages.push(msg);
+                self.data.save_to_file("".to_string()).unwrap();
             }
             GuiEvent::SetProfile(pkey, name) => {
                 if self.data.chat_with(&pkey).is_none() {
@@ -162,6 +219,7 @@ impl Application for DegeonApp {
                 }
                 let ind = self.data.chat_with(&pkey).unwrap();
                 self.data.chats[ind].profile = name;
+                self.data.save_to_file("".to_string()).unwrap();
             }
             GuiEvent::None => {}
             GuiEvent::WeHaveToSendProfile(target) => {
@@ -169,8 +227,9 @@ impl Application for DegeonApp {
                 return self.data.get_send_command(
                     ProtocolMsg::ProfileResponse(self.data.get_profile()),
                     &target,
-                )
+                );
             }
+            GuiEvent::ChangeScreen(sc) => self.screen = sc,
         }
         iced::Command::none()
     }
@@ -179,29 +238,11 @@ impl Application for DegeonApp {
         iced::Subscription::from_recipe(self.data.clone())
     }
 
-    fn view(&mut self) -> Element<GuiEvent> {
-        let Self {
-            data: Degeon { chats, .. },
-            selected_chat,
-            send_button_state,
-            text_input_state,
-            preview_button_states,
-            ..
-        } = self;
-        Row::new()
-            .padding(20)
-            .push(Self::chat_list(
-                chats,
-                preview_button_states,
-                *selected_chat,
-            ))
-            .push(Self::active_chat(
-                chats,
-                *selected_chat,
-                send_button_state,
-                text_input_state,
-            ))
-            .height(Length::Fill)
-            .into()
+    fn view(&mut self) -> Element<'_, Self::Message> {
+        match self.screen {
+            AppScreen::Main => self.main_view(),
+            AppScreen::ProfileEditor => todo!(),
+            AppScreen::PeerInput => todo!(),
+        }
     }
 }

degeon/src/styles.rs

@@ -6,6 +6,7 @@ pub mod style {
     pub enum Button {
         Primary,
         Secondary,
+        #[allow(dead_code)]
         Destructive,
         InactiveChat,
     }

src/interfaces/ip.rs

@@ -134,7 +134,7 @@ impl Interface for IPInterface {
                             .iter()
                             .find(|p| compare_addrs(p, connection_addr))
                         {
-                            if let Some(Some(conn)) = IPInterface::new_connection(peer).ok() {
+                            if let Ok(Some(conn)) = IPInterface::new_connection(peer) {
                                 new_connections.push(conn)
                             }
                         }
@@ -276,7 +276,7 @@ impl Interface for IPInterface {
                                 println!("Error while sending: {:?}", e);
                                 e
                             },
-                        );
+                        ).unwrap_or_default();
                     }
                 }
             }
@@ -401,7 +401,7 @@ impl IPInterface {
             .connections
             .iter()
             .filter_map(|conn| conn.peer_addr().ok())
-            .position(|addr| compare_addrs(&peer, addr))
+            .position(|addr| compare_addrs(peer, addr))
         {
             self.connections.remove(ind);
         }

src/ironforce.rs

@@ -16,7 +16,7 @@ const TUNNEL_MAX_REPEAT_COUNT: u32 = 3;
 #[cfg(feature = "std")]
 pub const DEFAULT_FILE: &str = ".if_data.json";
 
-/// Main worker
+/// Main IF worker
 #[derive(Hash)]
 pub struct IronForce {
     /// Keys for this instance
@@ -54,9 +54,13 @@ pub struct IronForce {
 /// Data for the serialization of IF
 #[derive(Serialize, Deserialize)]
 pub struct IFSerializationData {
+    /// Worker's keys
     pub keys: Keys,
+    /// Saved tunnels that go through this node
     pub tunnels: Vec<Tunnel>,
+    /// Peers for transport
     pub peers: Vec<PeerInfo>,
+    /// Data for all interfaces (in IP, for example, that's port and IPs of peers)
     pub interfaces_data: Vec<alloc::string::String>,
 }
 
@@ -325,6 +329,7 @@ impl IronForce {
         self.messages.pop()
     }
 
+    /// Run one iteration of main loop: accepting incoming connections and messages, processing them
     pub fn main_loop_iteration(&mut self) -> IFResult<()> {
         self.transport.main_loop_iteration()?;
         while let Some((msg, inc_peer)) = self.transport.receive() {
@@ -333,10 +338,12 @@ impl IronForce {
         Ok(())
     }
 
+    /// Get an id for the public key of the worker
     fn short_id(&self) -> alloc::string::String {
         self.keys.get_public().get_short_id()
     }
 
+    /// Get `IFSerializationData` that can be stored in a file
     pub fn get_serialization_data(&self) -> IFSerializationData {
         IFSerializationData {
             keys: self.keys.clone(),
@@ -346,6 +353,7 @@ impl IronForce {
         }
     }
 
+    /// Restore from `IFSerializationData`
     pub fn from_serialization_data(data: IFSerializationData) -> IFResult<Self> {
         Ok(Self {
             keys: data.keys,
@@ -361,6 +369,9 @@ impl IronForce {
         })
     }
 
+    /// Load from file (`filename`) with `IFSerializationData`
+    ///
+    /// If the filename is empty, the default filename is used
     #[cfg(feature = "std")]
     pub fn from_file(filename: alloc::string::String) -> IFResult<Self> {
         let filename = if filename.is_empty() {
@@ -377,6 +388,9 @@ impl IronForce {
         }
     }
 
+    /// Save `IFSerializationData` to a file with `filename`
+    ///
+    /// If `filename` is None, the default filename is used
     #[cfg(feature = "std")]
     pub fn save_to_file(&self, filename: Option<alloc::string::String>) -> IFResult<()> {
         std::fs::write(
@@ -386,6 +400,7 @@ impl IronForce {
         Ok(())
     }
 
+    /// Spawn a thread with IF main loop and return `Arc<Mutex<IF>>`
     #[cfg(feature = "std")]
     pub fn launch_main_loop(
         mut self,