I'm receiving sale order from customer via custom eCommerce app
I'm generating pro-forma invoice and sending it to the customer.
When I receive a bank transfer I'm confirming the order and preparing for delivery.
After the delivery I want to generate an actual invoice with an information that is is already paid based on pro-forma and that there is nothing more to do.
How do I do this? Is there such workflow in Odoo?
Using Odoo13