Pedersen implements the [Pedersen hash].

PedersenArray implements [Pedersen array hashing].

Poseidon implements the [Poseidon hash].

PoseidonArray calculates Poseidon hash over elems If len(elems) is odd, pads with [1] If len(elems) is even, pads with [1, 0] PoseidonArray implements [Poseidon array hashing].

StarknetKeccak implements [Starknet keccak] [Starknet keccak]: https://docs.starknet.io/architecture-and-concepts/cryptography/hash-functions/#starknet_keccak.