4 local jid_join = require "util.jid".join;

     4 local jid_join = require "util.jid".join;

     5 local set_new = require "util.set".new;

     5 local set_new = require "util.set".new;

     6 local st = require "util.stanza";

     6 local st = require "util.stanza";

     7 local calculate_hash = require "util.caps".calculate_hash;

     7 local calculate_hash = require "util.caps".calculate_hash;

     8 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;

     8 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;

    10 local set = require "util.set";

     9 local set = require "util.set";

    11 local new_id = require "util.id".medium;

    10 local new_id = require "util.id".medium;

    12 local storagemanager = require "core.storagemanager";

    11 local storagemanager = require "core.storagemanager";

    13 

    12 

    14 local xmlns_pubsub = "http://jabber.org/protocol/pubsub";

    13 local xmlns_pubsub = "http://jabber.org/protocol/pubsub";