checkpoints.cpp
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checkpoints.cpp
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	// Copyright (c) 2009-2016 The Bitcoin Core developers
	// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#include <checkpoints.h>

	#include <chainparams.h>
	#include <reverse_iterator.h>
	// D6970 moved LookupBlockIndex from chain.h to validation.h TODO: remove this
	// when LookupBlockIndex is refactored out of validation
	#include <validation.h>

	#include <cstdint>

	namespace Checkpoints {

	bool CheckBlock(const CCheckpointData &data, int nHeight,
	const BlockHash &hash) {
	const MapCheckpoints &checkpoints = data.mapCheckpoints;

	MapCheckpoints::const_iterator i = checkpoints.find(nHeight);
	if (i == checkpoints.end()) {
	return true;
	}
	return hash == i->second;
	}

	CBlockIndex *GetLastCheckpoint(const CCheckpointData &data)
	EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
	const MapCheckpoints &checkpoints = data.mapCheckpoints;

	for (const MapCheckpoints::value_type &i : reverse_iterate(checkpoints)) {
	const BlockHash &hash = i.second;
	CBlockIndex *pindex = LookupBlockIndex(hash);
	if (pindex) {
	return pindex;
	}
	}

	return nullptr;
	}

	} // namespace Checkpoints