function interact(from, to, url) {
	
	function pubsubActionForFrom() {
		// create new node
		// call _interact
	}
	
	function noPubsubActionForFrom() {
		yesPubsub = pubsubActionForTo;
		noPubsub = noPubsubActionForTo;
		
		var server = JID(from).hostname;
	
		XMPP.send(from,
			_discoStanza(server),
			pubsubEnabled);
	}
	
	function pubsubActionForTo() {
		// create new node
		// call _interact
	}
	
	function noPubsubActionForTo() {
		var server = JID(from).hostname;
	
		XMPP.send(from,
			_discoStanza(server),
			pubsubEnabled);
	}
	
	var yesPubsub = pubsubActionForFrom;
	var noPubsub = noPubsubActionForFrom;
	
	function pubsubEnabled(discoReply) {
		if(reply.stanza.@type == 'result') {
   			var query = reply.stanza.ns_disco_info::query;
   			var supportsInstantNodes = query..feature.(@var == instant_node_feature);
   			if (supportsInstantNodes) {
	   			yesPubsub();
   			} else {
	   			noPubsub();
   			}	   				
		}
	}
	
	var server = JID(from).hostname;
	
	XMPP.send(from,
		_discoStanza(server),
		pubsubEnabled);
    }
}