#sdk #wapc #webassembly #waxosuit

wapc-guest

Guest SDK for building waPC-compliant WebAssembly Modules

11 releases (3 stable)

1.1.0 Mar 23, 2023
1.0.0 Feb 10, 2022
0.4.0 Oct 15, 2020
0.3.1 Apr 14, 2020
0.1.1 Sep 19, 2019

#489 in WebAssembly

Download history 786/week @ 2023-11-03 559/week @ 2023-11-10 756/week @ 2023-11-17 671/week @ 2023-11-24 310/week @ 2023-12-01 588/week @ 2023-12-08 1014/week @ 2023-12-15 535/week @ 2023-12-22 544/week @ 2023-12-29 680/week @ 2024-01-05 879/week @ 2024-01-12 1375/week @ 2024-01-19 822/week @ 2024-01-26 1017/week @ 2024-02-02 897/week @ 2024-02-09 1295/week @ 2024-02-16

4,281 downloads per month
Used in 21 crates (18 directly)

Apache-2.0

12KB
228 lines

waPC Guest SDK

crates.io license

The wapc-guest library is an implementation of the guest-side of the waPC WebAssembly protocol. wapc-guest gives Rust developers the pieces necessary to easily compile WebAssembly modules that you can load in waPC hosts. Each guest module registers function handlers with [register_function()]. Each handler should return a [CallResult] (a Result<Vec<u8>,Box<dyn Error + Sync + Send>>) with the function's return value.

It's typically used by code generated by the wapc CLI.

Example

use wapc_guest as wapc;

#[no_mangle]
pub fn wapc_init() {
  wapc::register_function("ping", ping);
}

fn ping(msg: &[u8]) -> wapc::CallResult {
  wapc::console_log(&format!(
    "IN_WASM: Received request for `ping` operation with payload : {}",
    std::str::from_utf8(msg).unwrap()
  ));
  let _res = wapc::host_call("binding", "sample:namespace", "pong", msg)?;
  Ok(msg.to_vec())
}

Building

This crate is meant for projects targeting wasm32-unknown-unknown or wasm32-wasi.

Dependencies

~0.4–6.5MB
~15K SLoC