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The order flow follows a session-based checkout pattern:
  1. Create a checkout session — locks the product version, pricing, and currency
  2. Preview tax — calculates tax based on the buyer’s billing details
  3. Create an order — initiates payment and returns a PSP-hosted checkout URL
  4. Cancel an order — cancels a pending (unpaid) order before payment completes

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One-Time Order Status Values

StatusDescription
pendingOrder created, awaiting payment. Can be canceled.
completedPayment succeeded, order fulfilled.
canceledOrder canceled before payment was completed. Terminal state.

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Endpoints

Create Checkout Session

Lock product version and pricing for checkout

Preview Tax

Calculate tax before creating an order

Create One-Time Order

Create an order and get the payment URL

Cancel One-Time Order

Cancel a pending order before payment