psbt: set global_xpubs (at least for multisig descriptors) #27583

1. 
   Sjors commented at 1:16 pm on May 5, 2023: member

   Please describe the feature you’d like to see added.

   The walletcreatefundedpsbt, walletprocesspsbt and send* RPC, as well as the send dialog* in the GUI should populate the PSBT_GLOBAL_XPUB field (defined in BIP 174).

   At least when used in a multisig context, e.g. when spending from a multi() descriptor.

   The Ledger Bitcoin app enforces this as of version 2.1.1., see https://github.com/bitcoin-core/HWI/issues/671

   * = when used with an external signer

   Is your feature related to a problem, if so please describe it.

   Multisig funds (P2WSH and P2SH-P2WSH) are trapped on a Ledger if you update it’s Bitcoin app to 2.1.1, unless you use some additional tooling to set this field.

   Describe the solution you’d like

   No response

   Describe any alternatives you’ve considered

   No response

   Please leave any additional context

   No response

2. Sjors added the label Feature on May 5, 2023
3. 
   Sjors commented at 1:20 pm on May 5, 2023: member

   See also this discussion: https://github.com/cryptoadvance/specter-desktop/issues/1886#issuecomment-1246963927 and their implementation: https://github.com/cryptoadvance/specter-desktop/blob/master/src/cryptoadvance/specter/wallet/wallet.py#L1862-L1875
4. 
   BrandonOdiwuor commented at 1:25 pm on February 14, 2024: contributor

   What’s the progress with this?
5. 
   BrandonOdiwuor commented at 1:25 pm on February 14, 2024: contributor

   @achow101 what do you think of this?

Contributors
Sjors BrandonOdiwuor

Labels
Feature