http://6pb473duz5o6kdvedrvplpyce33ezwjxkehbwtagytxe6yqal4xe44yd.onion/articles/xmpp.html
For compatibility with old clients, this was stored in plain text on the server for a while. However, since August 2014, when a user logs in, the password has been overwritten with a hashed version. Which algorithm? The contacts of a user stored in the list together with information about the direction(s) in which visibility exists with this contact.