Hello Odoo Community,

I am currently working on a project and I'm looking for guidance on implementing a specific feature in Odoo. I would greatly appreciate your insights and expertise.

Objective: I aim to offer a discount to customers who sign up for our newsletter during the checkout process. The logic is to present a banner to the customer before payment, encouraging them to subscribe to our email newsletter in exchange for a discount on their total purchase.

Questions:

Once a customer subscribes, how can I create and apply a discount to their total purchase based on newsletter signup?

Any step-by-step instructions or advice on how to set up this logic in Odoo would be immensely helpful.