Where to find the keys to restore on chain wallets we create to receive BTC on RTL?

[SoulReaver-SS]

I see we can keep creating wallets, but I don't see a way to get the keys for the wallets so we have the ownership of the wallets and we can restore and stuff?

[saubyk]

Hi @SoulReaver-SS this is really dependent on the underlying lightning implementation.
LND - You need to record the keys when initiating for the first time. If you don't record, there is no api available to retrieve the keys again
Core Lightning - CLN does not provide any 24 word key phrase at initialization, but you can retrieve the keys for backup. Relevant discussion here: ElementsProject/cln-application#34
Eclair - For onchain wallet operation it's dependent on the Bitcoin core backend

[SoulReaver-SS]

Thnx for the answer.
I'm using BTCPay Server's own LND, trying to use it w/ RDT.
I selected LND from BTCYPay, get to RDT UI, press "on chain" from left panel, go to "On-chain Transactions" panel, select address type taproot, press generate address, it gives me the new taproot address, doesn't present the corresponding key for the address. So I can't say I've seen any keys in this flow, nor during selecting Built in LND from BTCPay server.

[saubyk]

So, the first thing that you should understand is that, every time you generate a new address, you'll not get the "corresponding key" for that address each time. That's not how address generation works. There is only one key for the wallet and addresses are derived from that key. A single key can be used to derive countless addresses.

So for recovery purposes, you only need to know that one wallet key, which you should keep a backup of.

Regarding the LND key for BTCPayserver which you need to backup, you can find it on your BTCPayserver panel:
Server Settings > Services > LND Seed Backup