This plugin is made for specifically for the merchant those are using https://wyse.me/ platform. This plugin should not be consider as a general giftcard plugin
WPShop - powerful online store plugin, with YandexMoney, RoboKassa, QIWI, WalletOne, VISA & MasterCard, PayPal, Interkassa and many more payment systems. Support 1C, MoySklad, UDS Game