NWC compatiblity issue with BuzzPay POS

[dmnyc]

I'm testing compatibility of the Minibits NWC connection with BuzzPay https://pos.albylabs.com/

When a payment is pending, I can see the incoming notifications that Minibits is communicating with the POS host, however the completed payment state does not seem to get sent back to the POS, so it continues to ping Minibits waiting for a success response.

This experience differs from using an Alby Hub wallet to receive the payment, which sends back a success response as soon as the payment is received.

[minibits-cash]

Thank you for testing it!

When nwc payment completes, app publishes nwc response event according to spec:

nwcResponse = { result_type: nwcRequest.method, result: { preimage: result.preimage, } } as NwcResponse

If that succeeds, alby POS needs to read this event from nwc connection relay and change its state accordingly.

So there is no direct comm of the wallet with the POS server.

To debug it, ideally would need to have support from / access to the POS server.

[dmnyc]

Thanks, I'll ask the Alby team about this.

[minibits-cash]

Would be great. Unfortunately, most NOSTR clients do not support more then a single relay in nwc conn string, so there is no redundancy.

Issues on minibits side could still be:

• wallet failing to publish the event (e.g. if you do not see local notification about completed nwc payment it could mean that the event might have failed to publish as well)
• some issue with minibits relay

If they can check if they read the result event it can help.