pub(crate) fn peer_discover(
    space: &mut Space,
    to_agent: Arc<KitsuneAgent>,
    from_agent: Arc<KitsuneAgent>,
    timeout_ms: u64,
) -> MustBoxFuture<'static, PeerDiscoverResult> {
    let i_s = space.i_s.clone();
    let evt_sender = space.evt_sender.clone();
    let tx = space.transport.clone();
    let bootstrap_service = space.config.bootstrap_service.clone();
    let space = space.space.clone();
    async move {
        // run tx.create_channel an conver success result into our return type
        let try_connect = |url| async {
            let (url, write, read) = tx.create_channel(url).await?;
            KitsuneP2pResult::Ok(PeerDiscoverResult::OkRemote { url, write, read })
        };

        // check if this agent is locally joined
        let check_local = || async {
            if i_s.is_agent_local(to_agent.clone()).await? {
                return Ok(PeerDiscoverResult::OkShortcut);
            }

            KitsuneP2pResult::Err("failed to connect".into())
        };

        // check if we have a reference to this agent in our peer store
        // if so, see if that url is valid via try_connect
        let check_peer_store = || async {
            if let Some(info) = evt_sender
                .get_agent_info_signed(GetAgentInfoSignedEvt {
                    space: space.clone(),
                    agent: to_agent.clone(),
                })
                .await?
            {
                let info = types::agent_store::AgentInfo::try_from(&info)?;
                let url = info
                    .as_urls_ref()
                    .get(0)
                    .ok_or_else(|| KitsuneP2pError::from("no url"))?
                    .clone();
                return try_connect(url).await;
            }

            KitsuneP2pResult::Err("failed to connect".into())
        };

        let check_network = || async {
            let nodes = get_5_or_less_non_local_agents_near_basis(
                space.clone(),
                from_agent.clone(),
                Arc::new(KitsuneBasis(to_agent.to_vec())),
                i_s.clone(),
                evt_sender.clone(),
                bootstrap_service.clone(),
            )
            .await?;

            // make an AgentInfoQuery request to the returned agents
            // return the first one to sucessfully return a result
            let (req_info, _) = futures::future::select_ok(nodes.into_iter().take(3).map(|info| {
                // grr we need to move info in but not everything else...
                // thus, we have to shadow all these with references
                let tx = &tx;
                let space = &space;
                let to_agent = &to_agent;
                async move {
                    let url = info
                        .as_urls_ref()
                        .get(0)
                        .ok_or_else(|| KitsuneP2pError::from("no url"))?
                        .clone();
                    let (_, mut write, read) = tx.create_channel(url).await?;

                    // write the query request
                    let msg = wire::Wire::agent_info_query(
                        space.clone(),
                        Arc::new(info.as_agent_ref().clone()),
                        Some(to_agent.clone()),
                        None,
                    )
                    .encode_vec()?;
                    KitsuneMetrics::count(KitsuneMetrics::AgentInfoQuery, msg.len());
                    write.write_and_close(msg).await?;

                    // parse the response
                    let res = read.read_to_end().await;
                    let (_, res) = wire::Wire::decode_ref(&res)?;
                    match res {
                        wire::Wire::AgentInfoQueryResp(wire::AgentInfoQueryResp {
                            mut agent_infos,
                        }) => {
                            if agent_infos.is_empty() {
                                Err("failed to connect".into())
                            } else {
                                // if we have a result, return it
                                Ok(agent_infos.remove(0))
                            }
                        }
                        _ => KitsuneP2pResult::Err("failed to connect".into()),
                    }
                }
                .boxed()
            }))
            .await?;

            // we got a result - let's add it to our store for the future
            let _ = evt_sender
                .put_agent_info_signed(PutAgentInfoSignedEvt {
                    space: space.clone(),
                    agent: from_agent.clone(),
                    agent_info_signed: req_info.clone(),
                })
                .await;

            // we got a result, try to connect to it
            let info = types::agent_store::AgentInfo::try_from(&req_info)?;
            let url = info
                .as_urls_ref()
                .get(0)
                .ok_or_else(|| KitsuneP2pError::from("no url"))?
                .clone();
            try_connect(url).await
        };

        let start_time = std::time::Instant::now();
        let mut interval_ms = 50;

        loop {
            if let Ok(res) = check_local().await {
                return res;
            }

            if let Ok(res) = check_peer_store().await {
                return res;
            }

            if let Ok(res) = check_network().await {
                return res;
            }

            let elapsed_ms = start_time.elapsed().as_millis() as u64;
            if elapsed_ms >= timeout_ms {
                return PeerDiscoverResult::Err("timeout".into());
            }

            interval_ms *= 2;
            if interval_ms > timeout_ms - elapsed_ms {
                interval_ms = timeout_ms - elapsed_ms;
            }

            tokio::time::delay_for(std::time::Duration::from_millis(interval_ms)).await;
        }
    }
    .boxed()
    .into()
}
/// attempt to establish a connection to another peer within given timeout
attempt to establish a connection to another peer within given timeout
attempt to establish a connection to another peer within given timeout
pub(crate) fn peer_discover(
    space: &mut Space,
    to_agent: Arc<KitsuneAgent>,
    from_agent: Arc<KitsuneAgent>,
    timeout_ms: u64,
) -> MustBoxFuture<'static, PeerDiscoverResult> {
    let i_s = space.i_s.clone();
    let evt_sender = space.evt_sender.clone();
    let tx = space.transport.clone();
    let bootstrap_service = space.config.bootstrap_service.clone();
    let space = space.space.clone();
    async move {
        // run tx.create_channel an conver success result into our return type
        let try_connect = |url| async {
            let (url, write, read) = tx.create_channel(url).await?;
            KitsuneP2pResult::Ok(PeerDiscoverResult::OkRemote { url, write, read })
        };
        // check if this agent is locally joined
        let check_local = || async {
            if i_s.is_agent_local(to_agent.clone()).await? {
                return Ok(PeerDiscoverResult::OkShortcut);
            }
            KitsuneP2pResult::Err("failed to connect".into())
        };
        // check if we have a reference to this agent in our peer store
        // if so, see if that url is valid via try_connect
        let check_peer_store = || async {
            if let Some(info) = evt_sender
                .get_agent_info_signed(GetAgentInfoSignedEvt {
                    space: space.clone(),
                    agent: to_agent.clone(),
                })
                .await?
            {
                let info = types::agent_store::AgentInfo::try_from(&info)?;
                let url = info
                    .as_urls_ref()
                    .get(0)
                    .ok_or_else(|| KitsuneP2pError::from("no url"))?
                    .clone();
                return try_connect(url).await;
            }
            KitsuneP2pResult::Err("failed to connect".into())
        };
        let check_network = || async {
            let nodes = get_5_or_less_non_local_agents_near_basis(
                space.clone(),
                from_agent.clone(),
                Arc::new(KitsuneBasis(to_agent.to_vec())),
                i_s.clone(),
                evt_sender.clone(),
                bootstrap_service.clone(),
            )
            .await?;
            // make an AgentInfoQuery request to the returned agents
            // return the first one to sucessfully return a result
            let (req_info, _) = futures::future::select_ok(nodes.into_iter().take(3).map(|info| {
                // grr we need to move info in but not everything else...
                // thus, we have to shadow all these with references
                let tx = &tx;
                let space = &space;
                let to_agent = &to_agent;
                async move {
                    let url = info
                        .as_urls_ref()
                        .get(0)
                        .ok_or_else(|| KitsuneP2pError::from("no url"))?
                        .clone();
                    let (_, mut write, read) = tx.create_channel(url).await?;
                    // write the query request
                    let msg = wire::Wire::agent_info_query(
                        space.clone(),
                        Arc::new(info.as_agent_ref().clone()),
                        Some(to_agent.clone()),
                        None,
                    )
                    .encode_vec()?;
                    KitsuneMetrics::count(KitsuneMetrics::AgentInfoQuery, msg.len());
                    write.write_and_close(msg).await?;
                    // parse the response
                    let res = read.read_to_end().await;
                    let (_, res) = wire::Wire::decode_ref(&res)?;
                    match res {
                        wire::Wire::AgentInfoQueryResp(wire::AgentInfoQueryResp {
                            mut agent_infos,
                        }) => {
                            if agent_infos.is_empty() {
                                Err("failed to connect".into())
                            } else {
                                // if we have a result, return it
                                Ok(agent_infos.remove(0))
                            }
                        }
                        _ => KitsuneP2pResult::Err("failed to connect".into()),
                    }
                }
                .boxed()
            }))
            .await?;
            // we got a result - let's add it to our store for the future
            let _ = evt_sender
                .put_agent_info_signed(PutAgentInfoSignedEvt {
                    space: space.clone(),
                    agent: from_agent.clone(),
                    agent_info_signed: req_info.clone(),
                })
                .await;
            // we got a result, try to connect to it
            let info = types::agent_store::AgentInfo::try_from(&req_info)?;
            let url = info
                .as_urls_ref()
                .get(0)
                .ok_or_else(|| KitsuneP2pError::from("no url"))?
                .clone();
            try_connect(url).await
        };
        let start_time = std::time::Instant::now();
        let mut interval_ms = 50;
        loop {
            if let Ok(res) = check_local().await {
                return res;
            }
            if let Ok(res) = check_peer_store().await {
                return res;
            }
            if let Ok(res) = check_network().await {
                return res;
            }
            let elapsed_ms = start_time.elapsed().as_millis() as u64;
            if elapsed_ms >= timeout_ms {
                return PeerDiscoverResult::Err("timeout".into());
            }
            interval_ms *= 2;
            if interval_ms > timeout_ms - elapsed_ms {
                interval_ms = timeout_ms - elapsed_ms;
            }
            tokio::time::delay_for(std::time::Duration::from_millis(interval_ms)).await;
        }
    }
    .boxed()
    .into()
}
pub ( crate ) fn peer_discover ( space : & mut Space , to_agent : Arc < KitsuneAgent > , from_agent : Arc < KitsuneAgent > , timeout_ms : u64 , ) -> MustBoxFuture < ' static , PeerDiscoverResult > { let i_s = space . i_s . clone ( ) ; let evt_sender = space . evt_sender . clone ( ) ; let tx = space . transport . clone ( ) ; let bootstrap_service = space . config . bootstrap_service . clone ( ) ; let space = space . space . clone ( ) ; async move { // run tx.create_channel an conver success result into our return type let try_connect = | url | async { let ( url , write , read ) = tx . create_channel ( url ) . await ? ; KitsuneP2pResult :: Ok ( PeerDiscoverResult :: OkRemote { url , write , read } ) } ; // check if this agent is locally joined let check_local = | | async { if i_s . is_agent_local ( to_agent . clone ( ) ) . await ? { return Ok ( PeerDiscoverResult :: OkShortcut ) ; } KitsuneP2pResult :: Err ( " " . into ( ) ) } ; // check if we have a reference to this agent in our peer store // if so, see if that url is valid via try_connect let check_peer_store = | | async { if let Some ( info ) = evt_sender . get_agent_info_signed ( GetAgentInfoSignedEvt { space : space . clone ( ) , agent : to_agent . clone ( ) , } ) . await ? { let info = types :: agent_store :: AgentInfo :: try_from ( & info ) ? ; let url = info . as_urls_ref ( ) . get ( 0 ) . ok_or_else ( | | KitsuneP2pError :: from ( " " ) ) ? . clone ( ) ; return try_connect ( url ) . await ; } KitsuneP2pResult :: Err ( " " . into ( ) ) } ; let check_network = | | async { let nodes = get_5_or_less_non_local_agents_near_basis ( space . clone ( ) , from_agent . clone ( ) , Arc :: new ( KitsuneBasis ( to_agent . to_vec ( ) ) ) , i_s . clone ( ) , evt_sender . clone ( ) , bootstrap_service . clone ( ) , ) . await ? ; // make an AgentInfoQuery request to the returned agents // return the first one to sucessfully return a result let ( req_info , _ ) = futures :: future :: select_ok ( nodes . into_iter ( ) . take ( 3 ) . map ( | info | { // grr we need to move info in but not everything else... // thus, we have to shadow all these with references let tx = & tx ; let space = & space ; let to_agent = & to_agent ; async move { let url = info . as_urls_ref ( ) . get ( 0 ) . ok_or_else ( | | KitsuneP2pError :: from ( " " ) ) ? . clone ( ) ; let ( _ , mut write , read ) = tx . create_channel ( url ) . await ? ; // write the query request let msg = wire :: Wire :: agent_info_query ( space . clone ( ) , Arc :: new ( info . as_agent_ref ( ) . clone ( ) ) , Some ( to_agent . clone ( ) ) , None , ) . encode_vec ( ) ? ; KitsuneMetrics :: count ( KitsuneMetrics :: AgentInfoQuery , msg . len ( ) ) ; write . write_and_close ( msg ) . await ? ; // parse the response let res = read . read_to_end ( ) . await ; let ( _ , res ) = wire :: Wire :: decode_ref ( & res ) ? ; match res { wire :: Wire :: AgentInfoQueryResp ( wire :: AgentInfoQueryResp { mut agent_infos , } ) => { if agent_infos . is_empty ( ) { Err ( " " . into ( ) ) } else { // if we have a result, return it Ok ( agent_infos . remove ( 0 ) ) } } _ => KitsuneP2pResult :: Err ( " " . into ( ) ) , } } . boxed ( ) } ) ) . await ? ; // we got a result - let's add it to our store for the future let _ = evt_sender . put_agent_info_signed ( PutAgentInfoSignedEvt { space : space . clone ( ) , agent : from_agent . clone ( ) , agent_info_signed : req_info . clone ( ) , } ) . await ; // we got a result, try to connect to it let info = types :: agent_store :: AgentInfo :: try_from ( & req_info ) ? ; let url = info . as_urls_ref ( ) . get ( 0 ) . ok_or_else ( | | KitsuneP2pError :: from ( " " ) ) ? . clone ( ) ; try_connect ( url ) . await } ; let start_time = std :: time :: Instant :: now ( ) ; let mut interval_ms = 50 ; loop { if let Ok ( res ) = check_local ( ) . await { return res ; } if let Ok ( res ) = check_peer_store ( ) . await { return res ; } if let Ok ( res ) = check_network ( ) . await { return res ; } let elapsed_ms = start_time . elapsed ( ) . as_millis ( ) as u64 ; if elapsed_ms >= timeout_ms { return PeerDiscoverResult :: Err ( " " . into ( ) ) ; } interval_ms *= 2 ; if interval_ms > timeout_ms - elapsed_ms { interval_ms = timeout_ms - elapsed_ms ; } tokio :: time :: delay_for ( std :: time :: Duration :: from_millis ( interval_ms ) ) . await ; } } . boxed ( ) . into ( ) }
attempt to establish a connection to another peer within given timeout
attempt to establish a connection to another peer within given timeout
space
&mut Space
to_agent
Arc<KitsuneAgent>
from_agent
Arc<KitsuneAgent>
timeout_ms
u64
space
&mut Space
to_agent
Arc<KitsuneAgent>
from_agent
Arc<KitsuneAgent>
timeout_ms
u64