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				// Copyright (c) 2018 The Bitcoin Core developers
				// Distributed under the MIT software license, see the accompanying
				// file COPYING or http://www.opensource.org/licenses/mit-license.php.

				#ifndef BITCOIN_UTIL_BYTEVECTORHASH_H
				#define BITCOIN_UTIL_BYTEVECTORHASH_H

				#include <cstdint>
				#include <vector>

				/**
				* Implementation of Hash named requirement for types that internally store a
				* byte array. This may be used as the hash function in std::unordered_set or
				* std::unordered_map over such types. Internally, this uses a random instance
				* of SipHash-2-4.
				*/
				class ByteVectorHash final {
				private:
				uint64_t m_k0, m_k1;

				public:
				ByteVectorHash();
				size_t operator()(const std::vector<uint8_t> &input) const;
				};

				#endif // BITCOIN_UTIL_BYTEVECTORHASH_H