use std::fs::File;
use std::io::prelude::*;

use rand::rngs::OsRng;
use ed25519_dalek::SigningKey;
//use ed25519_dalek::Signature;

fn main() ->  std::io::Result<()>{
    let filename = std::env::args().nth(1).expect("no filename given");

    let mut csprng = OsRng;
    let signing_key: SigningKey = SigningKey::generate(&mut csprng);

    let mut file = File::create(filename)?;
    file.write_all(&signing_key.to_bytes())?;
    Ok(())
}