Android app not connecting gRPC to BTCPayServer

[vanjaime]

Getting an error message in Android connecting to a lnd server via TOR.

Lnd server is reachable via TOR hidden service.

Zap version 0.3.0 Beta
Build 18

Is it possible to connect without certificate.l?

[michaelWuensch]

Hi there, thanks for the report.
Is your gRPC interface reachable under Port 80?
Zap Android only supports connecting with gRPC which is normally port 10009. REST (normally port 8080) is not supported.

[vanjaime]

This is how my server is building the config json

Note the certificate Thumprint is what I think is causing the problem

[michaelWuensch]

Hi,
unfortunatelly I have never tried to connect to a btc pay server behind tor.
As far as I know, btc pay does not use self signed certificates and therefore the certificate is not included in the connect data.
But the gRPC channels we make still requires SSL. Is there any possibility to acitvate SSL for your btc pay server and then try again?

[michaelWuensch]

Sorry, this got autoclosed when merging the PR it was mentioned in.
Most likely the issue should be fixed though with this PR.
If you could test it it would be awesome. I'll make a release today, or you can build it yourself of course.

[michaelWuensch]

The new version is now rolled out in the app store as well. Would be great if you could test it and give feedback.

[vanjaime]

Hi Thanks,

Just tested and few things I noticed.

-ZAP won't read QR code generated by BTCPayserver
-When copy paste the config=... generated by BTCPayServer it will not connect
-When copied the full content of config=... file and paste it directly it seems it finds the TOR hidden service but few seconds later error message "Connection failed. Handshake failed"

[michaelWuensch]

@vanjaime
Thanks for testing again.
I think I have to setup a BTCPayserver myself for easier debugging.
I'll let you know when I made some progress.