Attribute Macro sewup_derive::ewasm_lib_fn

#[ewasm_lib_fn]

helps you to build your handler in other module

This macro will automatically generated as {FUNCTION_NAME}_SIG

// module.rs

use sewup::ewasm_api;

#[ewasm_lib_fn]
pub fn symbol(s: &str) {
    let symbol = s.to_string().into_bytes();
    ewasm_api::finish_data(&symbol);
}

// lib.rs

use module::{symbol, SYMBOL_SIG};

#[ewasm_main]
fn main() -> Result<()> {
    let contract = Contract::new()?;
    match contract.get_function_selector()? {
        SYMBOL_SIG => symbol("ETD"),
        _ => return Err(Error::UnknownHandle.into()),
    };
    Ok(())
}