connexa 0.4.1

High level abtraction of rust-libp2p
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188

use crate::handle::Connexa;
use crate::types::RendezvousCommand;
use bytes::Bytes;
use futures::channel::oneshot;
use libp2p::rendezvous::{Cookie, Namespace};
use libp2p::{Multiaddr, PeerId};
use std::io;

#[derive(Copy, Clone)]
pub struct ConnexaRendezvous<'a, T> {
    connexa: &'a Connexa<T>,
}

impl<'a, T> ConnexaRendezvous<'a, T>
where
    T: Send + Sync + 'static,
{
    pub(crate) fn new(connexa: &'a Connexa<T>) -> Self {
        Self { connexa }
    }

    /// Registers a peer in a namespace with an optional time-to-live (TTL).
    pub async fn register(
        &self,
        peer_id: PeerId,
        namespace: impl IntoNamespace,
        ttl: Option<u64>,
    ) -> io::Result<()> {
        let namespace = namespace.into_namespace()?.ok_or(io::Error::new(
            io::ErrorKind::InvalidInput,
            "namespace is not provided",
        ))?;

        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(
                RendezvousCommand::Register {
                    namespace,
                    peer_id,
                    ttl,
                    resp: tx,
                }
                .into(),
            )
            .await?;

        rx.await.map_err(io::Error::other)?
    }

    /// Unregisters a peer from a namespace.
    pub async fn unregister(
        &self,
        peer_id: PeerId,
        namespace: impl IntoNamespace,
    ) -> io::Result<()> {
        let namespace = namespace.into_namespace()?.ok_or(io::Error::new(
            io::ErrorKind::InvalidInput,
            "namespace is not provided",
        ))?;

        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(
                RendezvousCommand::Unregister {
                    namespace,
                    peer_id,
                    resp: tx,
                }
                .into(),
            )
            .await?;

        rx.await.map_err(io::Error::other)?
    }

    /// Discovers peers in a namespace.
    pub async fn discovery(
        &self,
        peer_id: PeerId,
        namespace: impl IntoNamespace,
        ttl: Option<u64>,
        cookie: Option<Cookie>,
    ) -> io::Result<(Cookie, Vec<(PeerId, Vec<Multiaddr>)>)> {
        let namespace = namespace.into_namespace()?;
        let (tx, rx) = oneshot::channel();
        self.connexa
            .to_task
            .clone()
            .send(
                RendezvousCommand::Discover {
                    namespace,
                    peer_id,
                    cookie,
                    ttl,
                    resp: tx,
                }
                .into(),
            )
            .await?;

        rx.await.map_err(io::Error::other)?
    }
}

pub trait IntoNamespace {
    fn into_namespace(self) -> io::Result<Option<Namespace>>;
}

impl IntoNamespace for String {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Namespace::new(self).map_err(io::Error::other).map(Some)
    }
}

impl IntoNamespace for &String {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Namespace::new(self.clone())
            .map_err(io::Error::other)
            .map(Some)
    }
}

impl IntoNamespace for Namespace {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Ok(Some(self))
    }
}

impl IntoNamespace for &Namespace {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Ok(Some(self.clone()))
    }
}

impl IntoNamespace for &str {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Namespace::new(self.to_string())
            .map_err(io::Error::other)
            .map(Some)
    }
}

impl IntoNamespace for () {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        Ok(None)
    }
}

impl IntoNamespace for Vec<u8> {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(&self);
        str.into_namespace()
    }
}

impl IntoNamespace for &[u8] {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(self);
        str.into_namespace()
    }
}

impl IntoNamespace for Bytes {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(&self);
        str.into_namespace()
    }
}

impl IntoNamespace for &Bytes {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        let str = String::from_utf8_lossy(self);
        str.into_namespace()
    }
}

impl<N: IntoNamespace> IntoNamespace for Option<N> {
    fn into_namespace(self) -> io::Result<Option<Namespace>> {
        match self {
            Some(n) => n.into_namespace(),
            None => Ok(None),
        }
    }
}