// 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<u8, Self::OutputSize>) { self.h.finalize_xof().fill(out); } } impl OutputSizeUser for Blake3 { type OutputSize = U64; } impl HashMarker for Blake3 {}

Thank you!! I haven't had a chance to try it yet. For some reason I assumed that you had to clone the whole Dalek repo and rip sha256 manually. This is much better.