docs: add more examples and clarifications to external-signer.md #22678

1. 
   josibake commented at 6:05 pm on August 10, 2021: contributor

   proposing updates to docs/external-signer.md, specifically an explanation of how accounts are being used and examples of using the same device to create multiple wallets (motivation and discussion: #22635)
2. josibake added the label Feature on Aug 10, 2021
3. fanquake added the label Docs on Aug 12, 2021
4. 
   fanquake commented at 5:02 am on August 12, 2021: member

   cc @Sjors
5. 
   Sjors commented at 1:42 pm on August 12, 2021: member

   I guess the term “create” wallet is a bit confusing. When plugging in a hardware wallet, the wallet already exists, you’re just loading keys from it.

   There is a BIP 32 account feature buried in ExternalSignerPubkeyMan, which we could expose through the RPC and GUI. That would let you manage multiple wallets with separate address spaces. In terms of compatibility, afaik at e.g. the Ledger standard wallet software also knows how to find these accounts.

6. 
   fanquake commented at 8:37 am on August 9, 2022: member

   If someone wants to add more examples to the external signing docs they can do so, but I don’t think need to keep a “add more examples to X optional feature docs” issue open.
7. fanquake closed this on Aug 9, 2022

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8. 
   Rspigler commented at 2:22 am on August 20, 2022: contributor

   https://github.com/bitcoin/bitcoin/pull/25882
9. bitcoin locked this on Aug 20, 2023

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josibake fanquake Sjors Rspigler

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