Merge bitcoin/bitcoin#28373: doc: Add example of mixing private and public keys in descriptors

24b67fa9f6 doc: Add example of mixing private and public keys in descriptors (Anton A)

Pull request description:

  closes: #27414

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Ava Chow 2024-04-17 11:28:48 -04:00
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@ -243,7 +243,18 @@ Often it is useful to communicate a description of scripts along with the
necessary private keys. For this reason, anywhere a public key or xpub is
supported, a private key in WIF format or xprv may be provided instead.
This is useful when private keys are necessary for hardened derivation
steps, or for dumping wallet descriptors including private key material.
steps, for signing transactions, or for dumping wallet descriptors
including private key material.
For example, after importing the following 2-of-3 multisig descriptor
into a wallet, one could use `signrawtransactionwithwallet`
to sign a transaction with the first key:
```
sh(multi(2,xprv.../84'/0'/0'/0/0,xpub1...,xpub2...))
```
Note how the first key is an xprv private key with a specific derivation path,
while the other two are public keys.
### Compatibility with old wallets