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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 <uint256.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.
+ uint256 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.
+ unsigned int m_nchaintx = 0;
+
+ SnapshotMetadata() { }
+ SnapshotMetadata(
+ const uint256& base_blockhash,
+ uint64_t coins_count,
+ unsigned int 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