aud-detection.html">first blog of the series</a>, we are dispatching events based on the keys
specified in the active fraud detection rules. Multiple distinct rules
can be based on the same grouping key. This means that our alerting
function can potentially receive transactions scoped by the same key
(e.g. <code>{payerId=25;beneficiaryId=12}</code>), but destined to be evaluated
according to different rules, which implies potentially different
lengths of the time windows. This raises the question of how can