When one creates a new wallet from Bitcoin Core V26,
Is it possible to build a QR code of the actual wallet/private key/ as a solid backup paper wallet ?
How can I make a paper wallet from a Descriptor Wallet ?
Thanks
Yes, it is possible.
Run listdescriptors (true) via console or bitcoin-cli
The output will show relevant descriptor with all necessary data including fingeprint, derivation path, private key and checksum, something like following: "desc": "wpkh ([ede.../84h/0h/0h]your_private_key/1/*)#kq....."
Save all stuff that goes after desc: (without opening and closing ")
Use QR reader on cold air gapped machine to create QR code for descriptor you saved.
Please, notice that (true) is mandatory argument as on default it is false which results in descriptor for public key rather than private one.
To make paper wallet just print resulted QR code, again, using airgapped machine.