fuzz coverage

Coverage Report

Created: 2025-10-29 15:27

/Users/eugenesiegel/btc/bitcoin/src/index/txindex.cpp
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// Copyright (c) 2017-2022 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <index/txindex.h>
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#include <clientversion.h>
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#include <common/args.h>
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#include <index/disktxpos.h>
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#include <logging.h>
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#include <node/blockstorage.h>
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#include <primitives/transaction_identifier.h>
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#include <validation.h>
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constexpr uint8_t DB_TXINDEX{'t'};
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std::unique_ptr<TxIndex> g_txindex;
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/** Access to the txindex database (indexes/txindex/) */
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class TxIndex::DB : public BaseIndex::DB
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{
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public:
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    explicit DB(size_t n_cache_size, bool f_memory = false, bool f_wipe = false);
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    /// Read the disk location of the transaction data with the given hash. Returns false if the
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    /// transaction hash is not indexed.
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    bool ReadTxPos(const Txid& txid, CDiskTxPos& pos) const;
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    /// Write a batch of transaction positions to the DB.
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    [[nodiscard]] bool WriteTxs(const std::vector<std::pair<Txid, CDiskTxPos>>& v_pos);
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};
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TxIndex::DB::DB(size_t n_cache_size, bool f_memory, bool f_wipe) :
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    BaseIndex::DB(gArgs.GetDataDirNet() / "indexes" / "txindex", n_cache_size, f_memory, f_wipe)
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{}
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bool TxIndex::DB::ReadTxPos(const Txid& txid, CDiskTxPos& pos) const
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{
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    return Read(std::make_pair(DB_TXINDEX, txid.ToUint256()), pos);
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}
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bool TxIndex::DB::WriteTxs(const std::vector<std::pair<Txid, CDiskTxPos>>& v_pos)
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{
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    CDBBatch batch(*this);
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    for (const auto& [txid, pos] : v_pos) {
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        batch.Write(std::make_pair(DB_TXINDEX, txid.ToUint256()), pos);
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    }
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    return WriteBatch(batch);
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}
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TxIndex::TxIndex(std::unique_ptr<interfaces::Chain> chain, size_t n_cache_size, bool f_memory, bool f_wipe)
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    : BaseIndex(std::move(chain), "txindex"), m_db(std::make_unique<TxIndex::DB>(n_cache_size, f_memory, f_wipe))
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{}
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TxIndex::~TxIndex() = default;
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bool TxIndex::CustomAppend(const interfaces::BlockInfo& block)
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{
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    // Exclude genesis block transaction because outputs are not spendable.
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    if (block.height == 0) return true;
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    assert(block.data);
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    CDiskTxPos pos({block.file_number, block.data_pos}, GetSizeOfCompactSize(block.data->vtx.size()));
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    std::vector<std::pair<Txid, CDiskTxPos>> vPos;
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    vPos.reserve(block.data->vtx.size());
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    for (const auto& tx : block.data->vtx) {
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        vPos.emplace_back(tx->GetHash(), pos);
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        pos.nTxOffset += ::GetSerializeSize(TX_WITH_WITNESS(*tx));
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    }
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    return m_db->WriteTxs(vPos);
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}
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BaseIndex::DB& TxIndex::GetDB() const { return *m_db; }
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bool TxIndex::FindTx(const Txid& tx_hash, uint256& block_hash, CTransactionRef& tx) const
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{
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    CDiskTxPos postx;
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    if (!m_db->ReadTxPos(tx_hash, postx)) {
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        return false;
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    }
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    AutoFile file{m_chainstate->m_blockman.OpenBlockFile(postx, true)};
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    if (file.IsNull()) {
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        LogError("OpenBlockFile failed");
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#define LogError(...) LogPrintLevel_(BCLog::LogFlags::ALL, BCLog::Level::Error, /*should_ratelimit=*/true, __VA_ARGS__)
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#define LogPrintLevel_(category, level, should_ratelimit, ...) LogPrintFormatInternal(std::source_location::current(), category, level, should_ratelimit, __VA_ARGS__)
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        return false;
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    }
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    CBlockHeader header;
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    try {
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        file >> header;
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        file.seek(postx.nTxOffset, SEEK_CUR);
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        file >> TX_WITH_WITNESS(tx);
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    } catch (const std::exception& e) {
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        LogError("Deserialize or I/O error - %s", e.what());
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#define LogError(...) LogPrintLevel_(BCLog::LogFlags::ALL, BCLog::Level::Error, /*should_ratelimit=*/true, __VA_ARGS__)
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#define LogPrintLevel_(category, level, should_ratelimit, ...) LogPrintFormatInternal(std::source_location::current(), category, level, should_ratelimit, __VA_ARGS__)
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        return false;
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    }
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    if (tx->GetHash() != tx_hash) {
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        LogError("txid mismatch");
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#define LogError(...) LogPrintLevel_(BCLog::LogFlags::ALL, BCLog::Level::Error, /*should_ratelimit=*/true, __VA_ARGS__)
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#define LogPrintLevel_(category, level, should_ratelimit, ...) LogPrintFormatInternal(std::source_location::current(), category, level, should_ratelimit, __VA_ARGS__)
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        return false;
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    }
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    block_hash = header.GetHash();
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    return true;
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}