In order to customize the shopping and check-out process, we need to identify hooks or other extension points.
We suspect that WooCommerce provides sufficient hooks. What are they?
OpenTickets does not provide any API's. Since it is an extension of WooCommerce, WooCommerce and Wordpress hooks are likely to provide the extension points we need.
OpenTickets does support PHP overrides, but we don't have any documentation of this yet.