Purpose

After performing the validation, if the response was successful (status code 200), the channel needs to call the PATCH Update Basket - Discounts endpoint, using the following pattern:

[
  {
      "externalId": "coupon code",
      "provider": "coupon",
      "type": "order_flat_off",
      "value": 1234,
      "name": "coupon description"
  }
]