Add support for Zap button in onboarding

[JimmyMow]

Zap users frequently request my help for getting set up with Joule. I've noticed recently there is a Lightning App on-boarding button that looks to scan for the Lightning App's default port.

I think there should be a Zap Desktop on-boarding button as well. Our default port is 8180 (source: https://github.com/LN-Zap/zap-desktop/blob/master/app/lib/lnd/neutrino.js#L29)

[wbobeirne]

Hey, just looking into this now. Is there also a usual spot for macaroons to be?

[wbobeirne]

Ah, found them in ~/Library/Application Support/Zap/lnd/bitcoin/[network]/[name-of-wallet]. This might be tricky for users who have more than one wallet though, as there's no distinguishing naming between them, just a random number. It'd be awesome if Zap had an option to open the folder that contains all the goods.

[mrfelton]

Is there any way for Zap to communicate with Joule? Does Joule provide an accessible API of it's own?

[wbobeirne]

No, chrome extensions are completely sandboxed. It's possible to implement native app communication through the Native messaging API but that would require some Joule-specific implementations on Zap's side that I don't imagine us collaborating on in the short term. I'm totally open to any suggestions from the Zap team though, if there's a desire to do so!