code: function addUnconfirmedCorrespondent(device_pubkey, device_hub, device_name, onDone){
  	console.log("addUnconfirmedCorrespondent");
  	var device_address = objectHash.getDeviceAddress(device_pubkey);
  	db.query(
  		"INSERT "+db.getIgnore()+" INTO correspondent_devices (device_address, pubkey, hub, name, is_confirmed) VALUES (?,?,?,?,0)", 
  		[device_address, device_pubkey, device_hub, device_name],
  		function(){
  			if (onDone)
  				onDone(device_address);
  		}
  	);
  }
docs: ------------------------------- correspondents