pub async fn hash_with_key<H, M, K>(
    hash: H,
    message: M,
    key: K
) -> impl Future<Output = Result<(), OneErr>>where
    H: 'static + Into<BufWrite> + Send,
    M: 'static + Into<BufRead> + Send,
    K: 'static + Into<BufRead> + Send,
Expand description

blake2b hashing scheme