Selling digital gift card with a customized amount

The customer selects the digital gift card and the customized amount and makes the payment. The seller logs in to the EZPIN POS machine and searches for the selected gift card within the categories and chooses the option whereby she can have a range of amounts. Then she enters the requested amount and adds it to the cart. When she goes to checkout, she would be able to choose out of the four options of how the customer will receive the code, which are via SMS, via WhatsApp, via e-mail, or physically printed. Also, the seller can make all of these options through her phone or tablet.