def getWANIntf(ch):
    """
        Looks at the key:networkInterfaces for the chute and finds the WAN interface.

        Returns:
            The dict from networkInterfaces
            None
    """
    intfs = ch.getCache('networkInterfaces')
    if not intfs:
        return None
    for i in intfs:
        if i['type'] == 'wan':
            return i
    return None
