> ## Documentation Index
> Fetch the complete documentation index at: https://darwin.so/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Shopping & Delivery

> Purchase an exact product on reviewed price, seller, and delivery terms.

Use Act to carry a selected product and fulfillment path through review, payment, and confirmed delivery.

## Lock the order details

Provide the exact variant, quantity, merchant, destination, delivery window, return requirements, and maximum total price.

## Review the exact transaction

For `payment_required` or `approval_required`, show the item, seller, subtotal, fees, taxes, delivery terms, and expiry. Do not silently accept substitutions or price changes.

## Confirm fulfillment

Complete only after the Action returns a confirmed order or an explicit terminal outcome with the relevant receipt and delivery details.

[Explore this use case in Darwin](https://darwin.so/use-cases/shopping-delivery)