--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_invites_tracking/mod_invites_tracking.lua	Tue Jan 26 16:05:49 2021 +0100
@@ -0,0 +1,19 @@
+local tracking_store = module:open_store("invites_tracking");
+
+module:hook("user-registered", function(event)
+	local validated_invite = event.validated_invite or (event.session and event.session.validated_invite);
+	local new_username = event.username;
+
+	local invite_id = nil;
+	local invite_source = nil;
+	if validated_invite then
+		invite_source = validated_invite.additional_data and validated_invite.additional_data.source;
+		invite_id = validated_invite.token;
+	end
+
+	tracking_store:set(new_username, {invite_id = validated_invite.token, invite_source = invite_source});
+	module:log("debug", "recorded that invite from %s was used to create %s", invite_source, new_username)
+end);
+
+-- " " is an invalid localpart -> we can safely use it for store metadata
+tracking_store:set(" ", {version="1"});