def get_certificate_format_string() -> str:
    """Function to return the format string used by generate_v2v_certificate

    :return: the format string for a V2V certificate to be used in call to struct.unpack()
    :rtype: str
    """
    return "BBBBQBB" + "4s" + "QHLBHLBB24xQBB24xQ31xB"