Checkout UI extension pay event

[isumalatov]

I am developing an app for a customer which the customer in the checkout section through a checkout ui extension must insert a mandatory field called a link to be able to make the purchase, with that link I make a call to an API, but I can't find a way to make the call to the api when the customer has completed the payment.

[Liam]

Hi Isumalatov,

Just to confirm - your app adds a field to the checkout, which a customer populates and when the order is completed, the data that was entered into that field should get sent to an external API endpoint?