Two Tap allows resellers (apps, vendors, marketplaces, etc) to place orders on supplier eCommerce sites using code.
The API supports regular domestic checkout, and pick-up from store.
Two Tap take the asynchronous approach to placing orders. This means Two Tap accepts a purchase and processes it in the background. The actual processing time varies on a lot of factors, usually being under 2 minutes for domestic orders, and a day for international orders. However, in rare edge cases, this can take longer.
This approach is incredibly common in the eCommerce industry. For instance, when placing an order on Amazon's website your information is accepted instantly and if it wasn't valid you receive an email five minutes later. On almost any supplier there's a 'Processing' stage that can take up to a couple of days.
Two Tap works the same way. Handling this behavior is incredibly easy.