I've used the gateway with humble success in the past, though it is not working for me today. As I don't know where to send you an issue report, for future fame I gonna do it here.
I want to add to my Fountain.fm wallet via an invoice of 1,000 Sats (picture 1). When pasted into V4V it perfectly reflects that. After I've chosen 3.35 Hive via Keychain (picture 2), the confirm dialog asks for 9.357 Hive (picture 3). And since my Hive wallet did not hold that ammount, the swap failed (picture 4), though clearly is meant to swap 2,967 Satoshi. I'd never asked for that. What's going on here? That is way more then the fee table shows.
Picture 1:
Picture 2:
Picture 3:
Picture 4:
I gave it another try today, but it keeps me wonder why it asks for 9 instead of 3 Hive.
With more funds in my wallet I gave it another try recently. It was a success. Looks like it asks for a relatively big change. I don't know why. But I can say the service has no issue other then that.
Here is the prepared invoice (picture 1). The confirmation dialog again shows a lot more to be asked for (picture 2). The transaction went through (picture 3). And the difference came back as change (picture 4).