def METHOD_NAME(hex_string: str) -> Bytes8:
    """
    Convert hex string to 8 bytes.
    Parameters
    ----------
    hex_string :
        The hexadecimal string to be converted to 8 bytes.
    Returns
    -------
    8_byte_stream : `Bytes8`
        8-byte stream corresponding to the given hexadecimal string.
    """
    return Bytes8(bytes.fromhex(remove_hex_prefix(hex_string).rjust(16, "0")))