openapi: 3.0.3
info:
  title: Checkout API
  version: 1.0.0
paths:
  /checkout:
    post:
      operationId: createCheckout
      tags: [Checkout]
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required: [cartId]
              properties:
                cartId:
                  type: string
      responses:
        "201":
          description: Checkout created
        "401":
          description: Session expired
        "402":
          description: Payment declined
        "504":
          description: Payment provider timeout