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				// Copyright (c) 2009-2010 Satoshi Nakamoto
				// Copyright (c) 2009-2019 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_NODE_UTXO_SNAPSHOT_H
				#define BITCOIN_NODE_UTXO_SNAPSHOT_H

				#include <primitives/blockhash.h>
				#include <serialize.h>

				//! Metadata describing a serialized version of a UTXO set from which an
				//! assumeutxo CChainState can be constructed.
				class SnapshotMetadata {
				public:
				//! The hash of the block that reflects the tip of the chain for the
				//! UTXO set contained in this snapshot.
				BlockHash m_base_blockhash;

				//! The number of coins in the UTXO set contained in this snapshot. Used
				//! during snapshot load to estimate progress of UTXO set reconstruction.
				uint64_t m_coins_count = 0;

				//! Necessary to "fake" the base nChainTx so that we can estimate progress
				//! during initial block download for the assumeutxo chainstate.
				uint64_t m_nchaintx = 0;

				SnapshotMetadata() {}
				SnapshotMetadata(const BlockHash &base_blockhash, uint64_t coins_count,
				uint64_t nchaintx)
				: m_base_blockhash(base_blockhash), m_coins_count(coins_count),
				m_nchaintx(nchaintx) {}

				ADD_SERIALIZE_METHODS;

				template <typename Stream, typename Operation>
				inline void SerializationOp(Stream &s, Operation ser_action) {
				READWRITE(m_base_blockhash);
				READWRITE(m_coins_count);
				READWRITE(m_nchaintx);
				}
				};

				#endif // BITCOIN_NODE_UTXO_SNAPSHOT_H