Unable to add or pay invoices

I’m using LndHub with BTCPayServer (docker). When trying to create an invoice in BlueWallet, after a while the app shows an Alert dialog indicating that the call to /addinvoice had timed out, showing an HTTP 504 error from nginx:

API failure: Error {
  "type": "default",
  "status": 504,
  "ok": false,
  "statusText": "",
  "headers": {..., "server": "nginx",...},
  "url": "https://<myservername>/bluewallet_lndhub_app/addinvoice",
  ...
} 

In the LndHub logs, I can see the beginning of the /addinvoice router processing:

$ docker logs --tail 1000 bluewallet_lndhub_app
updateLightning()
updateLightning()
updateDescribeGraph()
2022-08-02T18:00:48.528Z : info: [/addinvoice] : ["<my-req-id>"]
2022-08-02T18:00:48.533Z : info: [/addinvoice] : ["<my-req-id>","userid: <myuserid>"]

So I know it made it to at least line 185: https://github.com/BlueWallet/LndHub/blob/master/controllers/api.js#L185

After a long while, the logs show the POST. My guess is that this is when nginx broke off waiting, but I’m not sure.

updateLightning()
<my-req-id> <my ip address> - - [02/Aug/2022:18:01:48 +0000] "POST /addinvoice HTTP/1.1" - - "-" "BlueWallet/1656866507 CFNetwork/1333.0.4 Darwin/21.5.0"
updateLightning()
updateDescribeGraph()

I also cannot pay invoices. Paying gives less information. The Alert box just says “Network request failed”. Logs are similar.

I suspect that there’s some kind of connection issue with LndHub talking to lnd but I don’t know what to do next to investigate further. This used to work, so I’m wondering if a certificate or network configuration changed in some way. I am able to create new accounts, so I don’t think it’s a problem with Redis.

[jimbojw]

Thanks! That seems to have fixed it. The test invoices I created from Blue Wallet disappeared after restart, but I am now again able to create invoices.

[dennisreimann]

Can you try btcpay-restart.sh? This will allow LND and LNDhub to pick up the changes tls.cert, which maybe didn’t happen. Depends on how you renewed it.