Attribute Macro wasm_func

#[wasm_func]

Wrap the function to be used with the protocol.

Arguments

All the arguments of the function should be &[u8], no lifetime needed.

Return type

The return type of the function should be Vec<u8> or Result<Vec<u8>, E> where E: ToString.

If the function return Vec<u8>, it will be implicitely wrapped in Ok.

Example

use wasm_minimal_protocol::wasm_func;

#[cfg(target_arch = "wasm32")]
wasm_minimal_protocol::initiate_protocol!();

#[cfg_attr(target_arch = "wasm32", wasm_func)]
fn function_one() -> Vec<u8> {
    Vec::new()
}

#[cfg_attr(target_arch = "wasm32", wasm_func)]
fn function_two(arg1: &[u8], arg2: &[u8]) -> Result<Vec<u8>, i32> {
    Ok(b"Normal message".to_vec())
}

#[cfg_attr(target_arch = "wasm32", wasm_func)]
fn function_three(arg1: &[u8]) -> Result<Vec<u8>, String> {
    Err(String::from("Error message"))
}