Trait sp_multihash::MultihashDigest[−][src]

pub trait MultihashDigest<const S: usize>: TryFrom<u64> + Into<u64> + Send + Sync + Unpin + Copy + Eq + Debug + 'static {
    fn digest(&self, input: &[u8]) -> Multihash<S>;

    fn multihash_from_digest<'a, D, const DIGEST_SIZE: usize>(
        digest: &'a D
    ) -> Multihash<S>
    where
        D: Digest<DIGEST_SIZE>,
        Self: From<&'a D>;
}
Expand description

Trait that implements hashing.

It is usually implemented by a custom code table enum that derives the Multihash derive.

Required methods

Calculate the hash of some input data.

Example
// `Code` implements `MultihashDigest`
use sp_multihash::{
  Code,
  MultihashDigest,
};

let hash = Code::Sha3_256.digest(b"Hello world!");
println!("{:02x?}", hash);

Create a multihash from an existing Digest.

Example
use sp_multihash::{
  Code,
  MultihashDigest,
  Sha3_256,
  StatefulHasher,
};

let mut hasher = Sha3_256::default();
hasher.update(b"Hello world!");
let hash = Code::multihash_from_digest(&hasher.finalize());
println!("{:02x?}", hash);

Implementors