I have just been checking out the Integration Fields with a Shopify Store. I have managed to hook everything up as expected in the user guides and I have data coming through to my Gatsby frontend to display on a page.
However I am a bit stuck in terms of adding an item to a cart or proceeding to a checkout as the data coming through doesn't include anything that looks like a checkout link or similar.
I would appreciate if anyone has gone this path to explain what I ought to be doing next?
Integration fields enables you to search through your catalog or external API to choose a product or a resource with all the details about each one.
For the checkout, I recommend you to take a look at the Shopify Checkout API documentation for developers. There you'll find all the info yo need to manage your checkout cart!