Crate libp2p_wasi_sockets 

WASI 0.2 sockets transport for rust-libp2p.

This crate implements libp2p_core::Transport over the wasi:sockets/tcp interface, enabling rust-libp2p applications to run as Wasm Components on any WASI 0.2 host (Wasmtime, Spin, jco, Wasmer) without modification to the rest of the libp2p stack.

Supported multiaddrs

• /ip4/<addr>/tcp/<port>
• /ip4/<addr>/tcp/<port>/p2p/<peer-id>
• /ip6/<addr>/tcp/<port>
• /ip6/<addr>/tcp/<port>/p2p/<peer-id>

Not supported

• /dns4, /dns6, /dnsaddr — DNS resolution via wasi:sockets/ip-name-lookup is a planned follow-up.
• /quic-v1, /ws, /wss, /webrtc, /p2p-circuit — out of scope.
• UDP — out of scope for v0.1.

Quick start

use libp2p_wasi_sockets::WasiTcpTransport;

let transport = WasiTcpTransport::default();

Build and run under Wasmtime:

cargo build --release --target wasm32-wasip2
wasmtime run -S inherit-network ./target/wasm32-wasip2/release/my_app.wasm

If you omit -S inherit-network, all dials will fail with Error::AccessDenied — Wasmtime denies all outbound connections by default.

Structs

Config

Configuration for WasiTcpTransport.

WasiTcpStream

A bidirectional TCP byte-stream wrapping wstd::net::TcpStream.

WasiTcpTransport

A libp2p transport backed by wasi:sockets/tcp.

Enums

Error