AmazonPay doesn't copy cart attributes and discounts

Retired Boards Appdev Customers Discounts And Orders

Topic summary

A technical issue occurs when users checkout via AmazonPay on a Hydrogen-based Shopify store. When redirecting to the checkout page with cart attributes and discount codes in the URL (e.g., ?discount=DISCOUNT), AmazonPay fails to preserve these parameters during its redirect process.

Key findings:

  • Cart attributes and discounts added via the Storefront API are not copied when using AmazonPay
  • Shop Pay does not exhibit this problem
  • The issue appears specific to AmazonPay’s redirect flow

Resolution:
The problem has been acknowledged and an internal issue was opened. According to the update, this has now been resolved.

Summarized with AI on November 17. AI used: claude-sonnet-4-5-20250929.
1

We are using hydrogen and redirecting users to the online store’s checkout page via the checkoutURL of the cart.

URL likes: 'https://checkout.palmwork.jp/checkouts/cn/{ID}/information?discount=DISCOUNT’

But, in the checkout, if the user used AmazonPay, the checkout page is redirected and all of the cart attributes and discounts added by the storefront API are not copied.

Redirected URL: ‘[https://checkout.palmwork.jp/](https://checkout.palmwork.jp/(){shop id}/checkouts/{checkout id}?step=contact_information’

It has no problem with Shop Pay.

So, We think it is the problem of Amazon Pay.

Someone knows the solution or more information.

Any help with this is much appreciated.

2

Thanks for reporting this @niwa3 . Seeing other similar reports, an issue has been opened internally.

Update: This has now been resolved :slightly_smiling_face: