// blake3 = "1.5"

// digest = "0.10"

// ed25519-dalek = { version = "2.1", features = [ "rand_core", "digest" ] }

use digest::generic_array::typenum::U64;

use digest::generic_array::GenericArray;

use digest::{FixedOutput, HashMarker, OutputSizeUser, Reset, Update};

/// This is a Blake3 Hasher implementing the traits required for use in

/// the ed25519 construction in place of SHA-512

#[derive(Clone)]

pub struct Blake3 {

pub(crate) h: blake3::Hasher,

}

impl Update for Blake3 {

#[inline]

fn update(&mut self, data: &[u8]) {

self.h.update(data.as_ref());

}

}

impl Reset for Blake3 {

#[inline]

fn reset(&mut self) {

self.h.reset();

}

}

impl Default for Blake3 {

#[inline]

fn default() -> Self {

Blake3 {

h: blake3::Hasher::new(),

}

}

}

impl FixedOutput for Blake3 {

#[inline]

fn finalize_into(self, out: &mut GenericArray) {

self.h.finalize_xof().fill(out);

}

}

impl OutputSizeUser for Blake3 {

type OutputSize = U64;

}

impl HashMarker for Blake3 {}