def get_channel_binding(self, cb_type='tls-unique'):
        if cb_type not in CHANNEL_BINDING_TYPES:
            raise ValueError('Unsupported channel binding type')
        if cb_type != "tls-unique":
            raise NotImplementedError('{0} channel binding type not implemented'.format(cb_type))
        if self._sslobj is None:
            return None
        return self._sslobj.tls_unique_cb()
Get channel binding data for current connection.  Raise ValueError
dataset/ETHPy150Open veegee/guv/guv/green/_ssl33.py/SSLSocket.get_channel_binding