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use generic_array::GenericArray; use generic_array::typenum::U32; use sha2::{Digest, Sha256}; pub type Hash = GenericArray<u8, U32>; /// Return a Sha256 hash for the given data. pub fn hash(val: &[u8]) -> Hash { let mut hasher = Sha256::default(); hasher.input(val); hasher.result() } /// Return the hash of the given hash extended with the given value. pub fn extend_and_hash(id: &Hash, val: &[u8]) -> Hash { let mut hash_data = id.to_vec(); hash_data.extend_from_slice(val); hash(&hash_data) }