shopware6 : Which event is triggered when an invoice/credit note is generated foor an order?

  events, php, shopware, symfony

I really need to retrieve the event to subscribe when an invoice document is generated for an order in shopware6 (principally after the payment of the order).
We are using a plugin (not made by us) which generates the invoice when an order is paid but I have no clue on how to find the event to do something JUST AFTER this generation !

I had a look there but did not find it :

Any idea?

thanks !

Source: Symfony Questions