"compareAtAmountPerQuantity" is broken in Discounts API function but works in Cart Transform API

[AncleMarvel]

THE VIDEO OF THE ISSUE

Short explanation: I added 2 products to a cart, checked logs of my 2 extensions. Inside of the extensions which uses Discounts API function I got null value for the field  compareAtAmountPerQuantity but logs for the extension which uses Cart Transform API it shows correct values.

But I received nulls in the input for Discounts API function:

{
  "cart": {
    "buyerIdentity": {
      "email": "nikita.shevchenko1@shop-fabrik.net",
      "customer": null
    },
    "isCompareAtDiscount": {
      "value": "true"
    },
    "lines": [
      {
        "id": "gid://shopify/CartLine/0",
        "quantity": 1,
        "merchandise": {
          "__typename": "ProductVariant",
          "id": "gid://shopify/ProductVariant/42115752034358",
          "product": {
            "isEligibleForDiscounting": true,
            "productType": "Hydration Tub",
            "title": "Cranberry",
            "id": "gid://shopify/Product/7289090277430",
            "score": null
          }
        },
        "cost": {
          "amountPerQuantity": {
            "amount": "39.99"
          },
          "compareAtAmountPerQuantity": null,
          "subtotalAmount": {
            "amount": "39.99"
          },
          "totalAmount": {
            "amount": "39.99"
          }
        }
      },
      {
        "id": "gid://shopify/CartLine/1",
        "quantity": 1,
        "merchandise": {
          "__typename": "ProductVariant",
          "id": "gid://shopify/ProductVariant/43039432835126",
          "product": {
            "isEligibleForDiscounting": true,
            "productType": "Shaker",
            "title": "2024 Shaker",
            "id": "gid://shopify/Product/7658676944950",
            "score": null
          }
        },
        "cost": {
          "amountPerQuantity": {
            "amount": "9.99"
          },
          "compareAtAmountPerQuantity": null,
          "subtotalAmount": {
            "amount": "9.99"
          },
          "totalAmount": {
            "amount": "9.99"
          }
        }
      }
    ]
  },
  "shop": {
    "config": null
  }
}

And correct values in the Cart Transform API function:

{
  "cart": {
    "lines": [
      {
        "id": "gid://shopify/CartLine/a0a735ab-a3db-41fe-bb6b-a63eda290890",
        "quantity": 1,
        "routineID": null,
        "setID": null,
        "giftsCreatorID": null,
        "merchandise": {
          "id": "gid://shopify/ProductVariant/42115752034358",
          "product": {
            "productType": "Hydration Tub"
          }
        },
        "cost": {
          "amountPerQuantity": {
            "amount": "39.99"
          },
          "compareAtAmountPerQuantity": {
            "amount": "50.0"
          },
          "subtotalAmount": {
            "amount": "39.99"
          },
          "totalAmount": {
            "amount": "39.99"
          }
        }
      },
      {
        "id": "gid://shopify/CartLine/c7d70b81-8396-43ce-8b93-1b48d1c3a89b",
        "quantity": 1,
        "routineID": null,
        "setID": null,
        "giftsCreatorID": null,
        "merchandise": {
          "id": "gid://shopify/ProductVariant/43039432835126",
          "product": {
            "productType": "Shaker"
          }
        },
        "cost": {
          "amountPerQuantity": {
            "amount": "9.99"
          },
          "compareAtAmountPerQuantity": {
            "amount": "20.0"
          },
          "subtotalAmount": {
            "amount": "9.99"
          },
          "totalAmount": {
            "amount": "9.99"
          }
        }
      }
    ]
  },
  "shop": {
    "bundlesConfig": {
      "value": "{\"setID\":{\"parentProductTitle\":\"Set Creator\",\"parentVariantId\":42928873111606,\"thresholdDiscounts\":{\"3\":10}},\"giftsCreatorID\":{\"parentProductTitle\":\"Gift Box Creator\",\"parentVariantId\":42928873111606,\"thresholdDiscounts\":{\"3\":10}},\"routineID\":{\"parentProductTitle\":\"Routine Generator\",\"parentVariantId\":42928873111606,\"thresholdDiscounts\":{\"3\":10}}}"
    }
  }
}

[jfeuchtertqgg · Accepted solution]

Hey @AncleMarvel I've heard back from Shopify and problably you have too. For anyone else it seems there is a setting in the markets which affect the display of the compareAtAmountPerQuantity. This is if you go to Settings>Markets>preferences and toggling off the Hide Compare at Pricing:

 Deactivating this worked for us at least. We are still checking to see what sideeffects this might have though. So test and use with caution haha.