Hey @danfeeley,
You can find these actions in this file within Event Tickets:
event-tickets/src/Tribe/Tickets.php
There you’ll find the action tribe_tickets_ticket_add, whose definition in the file looks like this (note the three arguments you can use):
/**
* Fired once a ticket has been created and added to a post
*
* @var $post_id Post ID
* @var $ticket Ticket object
* @var $data Submitted post data
*/
do_action( 'tribe_tickets_ticket_add', $post_id, $ticket, $data );
Please note that the addition of tickets happens with AJAX, so keep this in mind if you are using the hooks that run upon ticket creation and expecting to see UI changes.
You might need or want to listen to event triggers in the JavaScript of the plugin too, not just the PHP, in which case there is a jQuery trigger when a ticket is added called saved-ticket.tribe. You can learn more about saved-ticket.tribe by heading into this file within Event Tickets:
event-tickets/src/resources/js/tickets.js
Cheers,
George