utils.py 文件源码

def normalize_name(name):
    '''
    Clean the fully qualified name, as defined in ENS `EIP-137
    <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-137.md#name-syntax>`_

    This does *not* enforce whether ``name`` is a label or fully qualified domain.

    :param str name: the dot-separated ENS name
    :raises InvalidName: if ``name`` has invalid syntax
    '''
    if not name:
        return name
    elif isinstance(name, (bytes, bytearray)):
        name = name.decode('utf-8')
    try:
        return idna.decode(name, uts46=True, std3_rules=True)
    except idna.IDNAError as exc:
        raise InvalidName("%s is an invalid name, because %s" % (name, exc)) from exc