Shopping Cart/Checkout line item custom images

[sebastian555]

I'm looking for a solution which would allow me to supply custom image of each checkout line item. I'm using Hydrogen and I have some control over the shopping cart behavior. I have an ability to create the URLs for images. Can this be achieved using something like custom fields (URL) and some Shopify app?

Requirements: 

- Image URL needs to be tied to checkout/order or ideally checkout/order line item 

- I need to be able to update it via an API call

[sebastian555]

Hi, thanks for the response. That solves the Hydrogen app checkout panel display which I have control over. But 2 pieces are still missing:

1. I can't see any custom fields which I can implement against Line Item. For example I was able to create custom field against Variant and fetch it with GraphQL query on my hydrogen app, but I can't see custom fields for Line Item in Shopify Admin Settings > Custom Data:

 2. Checkout page is not part of Hydrogen app, it's part of the classic Shopify shop which comes out of the box

Any ideas?

[sebastian555]

Where can I access this script editor?