diff -r 8a29e7206917 plugins/mod_roster.lua
--- a/plugins/mod_roster.lua	Sun Oct 25 15:23:36 2020 +0100
+++ b/plugins/mod_roster.lua	Mon Nov 02 17:09:21 2020 +0100
@@ -57,6 +57,7 @@
 			end
 			roster.tags[1].attr.ver = server_ver;
 		end
+        if module:fire_event("roster-get", { session = session, stanza = stanza }) then return; end
 		session.send(roster);
 		session.interested = true; -- resource is interested in roster updates
 	else -- stanza.attr.type == "set"