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// Copyright (c) 2021 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_TEST_UTIL_CHAINSTATE_H
#define BITCOIN_TEST_UTIL_CHAINSTATE_H
#include <clientversion.h>
#include <fs.h>
#include <node/context.h>
#include <node/utxo_snapshot.h>
#include <rpc/blockchain.h>
#include <validation.h>
#include <univalue.h>
#include <boost/test/unit_test.hpp>
const auto NoMalleation = [](CAutoFile& file, SnapshotMetadata& meta){};
/**
* Create and activate a UTXO snapshot, optionally providing a function to
* malleate the snapshot.
*/
template<typename F = decltype(NoMalleation)>
static bool
CreateAndActivateUTXOSnapshot(NodeContext& node, const fs::path root, F malleation = NoMalleation)
{
// Write out a snapshot to the test's tempdir.
//
int height;
WITH_LOCK(::cs_main, height = node.chainman->ActiveHeight());
fs::path snapshot_path = root / tfm::format("test_snapshot.%d.dat", height);
FILE* outfile{fsbridge::fopen(snapshot_path, "wb")};
CAutoFile auto_outfile{outfile, SER_DISK, CLIENT_VERSION};
UniValue result = CreateUTXOSnapshot(node, node.chainman->ActiveChainstate(), auto_outfile);
BOOST_TEST_MESSAGE(
"Wrote UTXO snapshot to " << fs::PathToString(snapshot_path.make_preferred()) << ": " << result.write());
// Read the written snapshot in and then activate it.
//
FILE* infile{fsbridge::fopen(snapshot_path, "rb")};
CAutoFile auto_infile{infile, SER_DISK, CLIENT_VERSION};
SnapshotMetadata metadata;
auto_infile >> metadata;
malleation(auto_infile, metadata);
return node.chainman->ActivateSnapshot(auto_infile, metadata, /*in_memory=*/true);
}
#endif // BITCOIN_TEST_UTIL_CHAINSTATE_H
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