Hey @gotagreatdog, if your Umbrel is online you can click Download Channel Backup file and grab your channel.backup,
That is your SCB file,
You can also ask your peer to cooperative close, are they online?
The tar.gz.pgp is encrypted by your own machine, referenced here “The backups are encrypted client side,” to use that file you must recover with your seed and then can get all the channels back, which will force close as noted in disaster recovery - closing channels is currently recommended as the safest and most reliable way to return funds - as offchain channel migration and disaster recovery as we see here has many things that can go wrong and we want to avoid having to do a disaster recovery,
I’m sorry you had that issue, flashing your MicroSD card shouldn’t have caused you to reinstall Lightning Node App and do a recovery (automated recovery is a great step if someone has completely relocated for example and have no access to the old device), is the Pi 4 still functioning?
You don’t need to have done anything differently, except by troubleshooting the Pi 4 we should have been able to get it right back online and secure funds with lightning channels still open,
More details on the SCB file:
Many of the steps are quite a bit of hassle to manually download a channel.db file and reinitiliaze LND natively, a lot can go wrong here if we broadcast a stale channel for instance we risk losing all funds, so we should ensure we have some redundancies in place on our setup like plugging in with official power supply, extra MicroSD card on hand, using an uninterruptible power supply etc. and being confident in our setup and recovery process steps before storing any significant funds,
triggerforcelose command would be the chantools command on LND if it is a CLN peer that would be an issue on sometimes only on Tor AFAIK, have we identified the peer on your last channel to confirm?
That channel is offline? We can double check on steps here to get this last channel closed for you