Hi, I wanted to seek advice on what is all needed to build a new app. Specifically its supposed to be a pop in the store page that the merchants customer will see and based on results there, apply a coupon if they received one. Of course, the merchant will be able to apply coupons or edit them later on. For now, I just want to show the pop up and apply a discount. Any advice is greatly appreciated. I played around with the block embed so theme extensions and tried talking to the backend on my app using proxy to see if I can apply a discount. Let me know if this is wrong or if there is a better approach!