def METHOD_NAME(hex_string: str) -> Bytes256:
    """
    Convert hex string to 256 bytes.
    Parameters
    ----------
    hex_string :
        The hexadecimal string to be converted to 256 bytes.
    Returns
    -------
    256_byte_stream : `Bytes256`
        256-byte stream corresponding to the given hexadecimal string.
    """
    return Bytes256(
        bytes.fromhex(remove_hex_prefix(hex_string).rjust(512, "0"))
    )