[Question] How to get the private key for a generated address?

[nopara73]

Assuming I'm using the lnd daemon. I don't seem to find a way to do this. Maybe I can get the master extended private key somehow? Or am I supposed to do it manually? Find the wallet file, decrypt it and go on with my life?

[Roasbeef]

There's no way to extract private keys from the daemon currently. All key handling and signing are abstracted behind a set of core interfaces. Assuming a btcwallet implementation for these interfaces, one would need to find the wallet file, decrypt it, etc.

What use case do you have in mind?

[nopara73]

@Roasbeef Thanks for your swift reply!

There's no way to extract private keys from the daemon currently.

Is it a security consideration or it just wasn't implemented?

What use case do you have in mind?

I am looking at the possibility of replacing HiddenWallet's back end, which is custom code right now with lnd, because of Neutrino and the possibility of seamless future LN integration. I must sign an arbitrary message, build transactions with shuffled input and output indexing, sign CoinJoin transactions partially, these comes to my mind, but there are many more. As I also figured there is no transaction hex propagation through the daemon, either, so I am starting to think there are too many walls to climb here.

[Roasbeef]

Well it's just that we haven't added such an interface yet, not that we'll never do so.

[halseth]

Well ww do have the SignMessage RPC, maybe it could be extended to specify which address to sign for?

[plantOS]

Any progress on this?

[patch-master]

Hi there, any progress on enabling the extraction of private keys?

[merclyn]

Could we export the extended public Key?

[jacohend]

@Roasbeef I second @merclyn, I need to get my wallet's public key so I can use the SignOutputRaw grpc, which requires either a "key_locator" or a wallet public key as an argument

[yohaaan]

any update on this? I'd use private key extraction as well

[AzerChainToken]

Hello people! Haved a any tools for export private key from Zap Wallet?

[guggero]

There is a PR that adds a command line utility to extract the xprv HD extended root key and individual private keys: #2373

@jacohend you can find out the derivation path for the node public key here: https://github.com/lightningnetwork/lnd/blob/master/keychain/derivation.go
It is m/1017'/0'/6'/0/0

[KriptoQraf]

I'm new and I didn’t understand anything

[testnetprotonmail]

bump, please allow export of private keys, or enable rbf in PSBT.