Method checkPacket

src/Client/Connection.cpp:1338–1353

std::optional<UInt64> Connection::checkPacket(size_t timeout_microseconds)
{
    if (last_input_packet_type.has_value())
        return last_input_packet_type;

    if (hasReadPendingData() || poll(timeout_microseconds))
    {
        UInt64 packet_type = 0;
        readVarUInt(packet_type, *in);

        last_input_packet_type.emplace(packet_type);
        return last_input_packet_type;
    }

    return {};
}


UInt64 Connection::receivePacketType()