test

        return head.Revesion;

    }

    // Validate that all records in buffer have consistent offsets.

    // Returns false if any record's datasize would exceed the buffer.

    static bool bufferValid(const std::vector<uint8_t> &buf) {

        if (buf.size() < sizeof(AuthHeader))

            return buf.empty(); // empty is ok, too-small header is not

        size_t rd = sizeof(AuthHeader);

        while (rd + sizeof(AuthData::Record) <= buf.size()) {

            AuthData::Record rec;

            std::memcpy(&rec, buf.data() + rd, sizeof(AuthData::Record));

            rd += sizeof(AuthData::Record);

            if (rd + rec.datasize > buf.size())

                return false;

            rd += rec.datasize;

        }

        return true;

    }

    void ClusterBackend::fetchFromCluster() {

        if (!g_Cluster || !g_Cluster->isRunning())

            return;