use rand::Rng; fn main() { let random_bytes: Vec<u8> = (0..1024).map(|_| { rand::random::<u8>() }).collect(); println!("{:?}", random_bytes); }use rand::Rng; fn main() { let random_bytes = rand::thread_rng().gen::<[u8; 32]>(); println!("{:?}", random_bytes); }