I’d like to add a button to my customers restaurant POS menu.
Upon checking out a customer, I want them to click the custom button and have it take them to my website, with the sale details in the URL parameters. Once they’ve finished on my website, the browser with my app open will close and they will be taken back to finish the checkout on Square’s POS.
It’s important that I associated the transaction at checkout with the interaction on my website. This was easy to do with Lightspeeds Retail API, but I’m struggling to figure out how to do this with Square.
Can anyone lend me a helping hand please? Is there a better way to associated the transaction at checkout with an interaction on my website?