Unique user id from my mobile app in shopify order

[kylowrobelek]

Hello,

When the user is redirected from my mobile app to shop (which cooperates with me), I pass UUID in that url.

If user purchased sth, I'd to pass that UUID to Order objects, so after some time I can check which items were bought thanks to my app - of course I can do it by shopify app.

So, can I achieve that? E.g. can "purchase paid" event be overrided by developer? Maybe some custom actions by ShopifyAPI can be added?

[Umiko]

Hi @kylowrobelek 👋

With the Admin API, you should be able to update `customAttributes` or `metafields` for an order with the `orderUpdate` mutation to store a custom UUID as needed. If the order has already been closed, the `orderOpen` mutation can be used as well. 

Hope that helps!

[kylowrobelek]

Ok, but is there an option to do it by frontend side? E.g. I got UUID in a cookie and I want to pass it during Create Order Event.