1// Copyright (c) 2018-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_UTIL_BYTEVECTORHASH_H
6#define BITCOIN_UTIL_BYTEVECTORHASH_H
7
8#include <cstdint>
9#include <cstddef>
10#include <vector>
11
12/**
13 * Implementation of Hash named requirement for types that internally store a byte array. This may
14 * be used as the hash function in std::unordered_set or std::unordered_map over such types.
15 * Internally, this uses a random instance of SipHash-2-4.
16 */
17class ByteVectorHash final
18{
19private:
20    uint64_t m_k0, m_k1;
21
22public:
23    ByteVectorHash();
24    size_t operator()(const std::vector<unsigned char>& input) const;
25};
26
27#endif // BITCOIN_UTIL_BYTEVECTORHASH_H
28