A link to the discussion on our local board, can be found
HERE. Is the method above safe to do?
It looks similar to my instructions here:
http://bitcointalk.org/index.php?topic=5449245.msg62109703#msg62109703The method is safe as long as it's done in an Air-Gap machine.
However, the exported private key
must be kept safe at all cost because it could compromise all of the other child key
of its parent extended private key (
xprv) if the extended public key from the wallet is compromised with it.
Unlike the legacy wallet.dat with pure hardened derivation path, the new descriptor wallet derives the receiving/change derivation paths and its child keys without "
hardened" derivation.
It means that a child private key and its public parent can be used to compute its private parent key.
So, only do that if exporting the private key is really necessary.