Is there a trigger on Mautic that shows the cron broadcast:send got at the end?

Your software
My Mautic version is: 3.3.3

Is there a trigger on Mautic (not by interface) or a field on the database that shows the crons campaign:trigger and broadcast:send got at the end? I am doing a plugin to a client that instead of sending to a traditional SMTP, the plugin generates a CSV with all contacts and tokens, but how I identify that email segment or campaign there is no contact left?