Writing apps for hardware signing devices is about to get this easy

```

#![cfg_attr(target_arch = "riscv32", no_std, no_main)]

extern crate alloc;

use alloc::vec::Vec;

sdk::bootstrap!();

fn process_message(_app: &mut sdk::App, msg: &[u8]) -> Vec {

msg.to_vec()

}

pub fn main() {

sdk::App::new(process_message).run();

}

```