Neutrino 🔁 Bitcoin Node Automatic Switching about umbrel

[lukechilds]

Concept ACK.

Would love to see this, it's a feature that I hear a lot of people talk about but AFAIK no one has implemented yet, would be great if Umbrel was the first.

[nolim1t]

Will attempt to do this. Probably a bash looping service similar to the unlock script

[nolim1t]

it would need to keep running too and be able to switch back and forth too.

Say bitcoind is corrupted it should switch back and forth

[mayankchhabra]

Awesome! Looking forward. It really is one of the last few missing pieces before we can launch.

[nolim1t]

sample code which can do it

#!/bin/bash -e

PASSWORD=`cat $PWD/secrets/rpcpass.txt`

INFO=`curl --user lncm:$PASSWORD --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getblockchaininfo", "params": [] }' http://10.254.2.2:18332 2>/dev/null`

HEADERS=`echo $INFO | jq .result.headers`
BLOCKS=`echo $INFO | jq .result.blocks`

if [ $HEADERS -eq $BLOCKS ]; then
    echo "Switching over from bitcoind to neutrino"
    sed 's/bitcoin.node\=neutrino/bitcoin.node\=bitcoind/g; ' lnd/lnd.conf
fi

[mayankchhabra]

Instead of creating a new docker service, perhaps this should be handled by https://github.com/getumbrel/umbrel-manager

[nolim1t]

lets make it $HOST/lnd/lnd.conf or /mnt/data/lnd/lnd.conf

[nolim1t]

can be a docker service for sure and restart: on-error

[mayankchhabra]

lets make it $HOST/lnd/lnd.conf or /mnt/data/lnd/lnd.conf

I didn't fully understand that.. can you please elaborate a bit?

Also, since $HOST/lnd/lnd.conf is symlinked to /mnt/data/lnd/lnd.conf, the lnd-switch can make changes directly to $HOST/lnd/lnd.conf

[nolim1t]

lets make it $HOST/lnd/lnd.conf or /mnt/data/lnd/lnd.conf

I didn't fully understand that.. can you please elaborate a bit?

Also, since $HOST/lnd/lnd.conf is symlinked to /mnt/data/lnd/lnd.conf, the lnd-switch can make changes directly to $HOST/lnd/lnd.conf

${HOME}

[nolim1t]

going to have a stab at this now.. it will need a lot of testing

[mayankchhabra]

Looking good

[nolim1t]

https://hub.docker.com/repository/docker/lncm/neutrino-switcher

[igorbastosib]

I know it is an old discussion here, I couldn't find anything new about the subject.

Is it still possible to use 100% LN + Neutrino (or any way to connect to a Bitcoin node on another device)?

I mean, I have a Device (not Umbrel) with a synched BitcoinCoreNode running, I'd like to prepare several Umbrel devices with LN and want to link them to my external BitcoinCoreNode (external just because it is not on the same device, but all on the same Network)

If yes, could someone please share how?