Salesforce Exam B2B-Commerce-Administrator Topic 3 Question 65 Discussion

To implement a custom child checkout component to modify out-of-the-box functionality in an LWR checkout flow, the developer must implement the CheckoutStep interface. This interface defines the contract between the child component and the parent Checkout component, and allows the child component to communicate with the checkout flow. The developer must implement the methods of this interface, such as getStepName, getStepLabel, getStepStatus, validateStep, and so on. The developer can also use the @wire(CheckoutApi) decorator to access the checkout API methods and data.Reference:

Customize Your Checkout Flow for a B2B Store (LWR)

CheckoutStep Interface