Method CDBWrapper

src/dbwrapper.cpp:117–167

}

CDBWrapper::CDBWrapper(const fs::path& path, size_t nCacheSize, bool fMemory, bool fWipe, bool obfuscate)
    : m_name(fs::basename(path))
{
    penv = nullptr;
    readoptions.verify_checksums = true;
    iteroptions.verify_checksums = true;
    iteroptions.fill_cache = false;
    syncoptions.sync = true;
    options = GetOptions(nCacheSize);
    options.create_if_missing = true;
    if (fMemory) {
        penv = leveldb::NewMemEnv(leveldb::Env::Default());
        options.env = penv;
    } else {
        if (fWipe) {
            LogPrintf("Wiping LevelDB in %s\n", path.string());
            leveldb::Status result = leveldb::DestroyDB(path.string(), options);
            dbwrapper_private::HandleError(result);
        }
        TryCreateDirectories(path);
        LogPrintf("Opening LevelDB in %s\n", path.string());
    }
    leveldb::Status status = leveldb::DB::Open(options, path.string(), &pdb);
    dbwrapper_private::HandleError(status);
    LogPrintf("Opened LevelDB successfully\n");

    if (gArgs.GetBoolArg("-forcecompactdb", false)) {
        LogPrintf("Starting database compaction of %s\n", path.string());
        pdb->CompactRange(nullptr, nullptr);
        LogPrintf("Finished database compaction of %s\n", path.string());
    }

    // The base-case obfuscation key, which is a noop.
    obfuscate_key = std::vector<unsigned char>(OBFUSCATE_KEY_NUM_BYTES, '\000');

    bool key_exists = Read(OBFUSCATE_KEY_KEY, obfuscate_key);

    if (!key_exists && obfuscate && IsEmpty()) {
        // Initialize non-degenerate obfuscation if it won't upset
        // existing, non-obfuscated data.
        std::vector<unsigned char> new_key = CreateObfuscateKey();

        // Write `new_key` so we don't obfuscate the key with itself
        Write(OBFUSCATE_KEY_KEY, new_key);
        obfuscate_key = new_key;

        LogPrintf("Wrote new obfuscate key for %s: %s\n", path.string(), HexStr(obfuscate_key));
    }

    LogPrintf("Using obfuscation key for %s: %s\n", path.string(), HexStr(obfuscate_key));
}

CDBWrapper::~CDBWrapper()
{