protected virtual async Task Purchase()
{
var oid = await VmService.RegisterOrder(PaymentInfo.Amount, PaymentInfo.Currency == "RUB"? 643 : 0, PaymentInfo.CustomerEmail, PaymentInfo.CustomerPhone, OrderId);
if (oid != 0)
{
PaymentUrl = VmService.GetPurchaseUrl(oid, PaymentInfo.CustomerEmail);
}
else
{
await UserDialogs.Error("Не удалось произвести оплату");
}
}