130c641e5c
**What** Create a service abstraction for the modules internal service layer. The objective is to reduce the effort of building new modules when the logic is the same or otherwise allow to override the default behavior. Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>
Promotion Module
The PromotionModule is Medusa’s promotion engine. It offers functionality to discount carts through coupon codes with a given set of rules governing when and how the code should be applied.