fn init_chacha20() -> ChaCha20Rng {
    let mut seed = [0u8; 32];
    OsRng.fill_bytes(&mut seed);
    ChaCha20Rng::from_seed(seed)
}
/// Initialise ChaCha20 with seed from OS's randomness.
Initialise ChaCha20 with seed from OS's randomness.
Initialise ChaCha20 with seed from OS ' s randomness .
fn init_chacha20() -> ChaCha20Rng {
    let mut seed = [0u8; 32];
    OsRng.fill_bytes(&mut seed);
    ChaCha20Rng::from_seed(seed)
}
fn init_chacha20 ( ) -> ChaCha20Rng { let mut seed = [ 0u8 ; 32 ] ; OsRng . fill_bytes ( & mut seed ) ; ChaCha20Rng :: from_seed ( seed ) }
Initialise ChaCha20 with seed from OS's randomness.
Initialise ChaCha20 with seed from OS ' s randomness .