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use blake3::Hasher;
use bytes::Bytes;
use ckb_merkle_mountain_range::{Error, Merge};
#[derive(Clone, Debug, Default, Eq, Hash, PartialEq)]
pub struct NumberHash(pub Bytes);
impl std::convert::From<u32> for NumberHash {
fn from(num: u32) -> Self {
let hash = blake3::hash(&num.to_le_bytes());
NumberHash(Bytes::copy_from_slice(hash.as_bytes()))
}
}
#[derive(Clone, Debug, Default, Eq, Hash, PartialEq)]
pub struct MergeNumberHash;
impl Merge for MergeNumberHash {
type Item = NumberHash;
fn merge(lhs: &Self::Item, rhs: &Self::Item) -> Result<Self::Item, Error> {
let mut hasher = Hasher::new();
hasher.update(&lhs.0);
hasher.update(&rhs.0);
let res = hasher.finalize();
Ok(NumberHash(Bytes::copy_from_slice(res.as_bytes())))
}
}