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You can't import a standard wallet XPUB (or paper wallet) into a multisig wallet (as you implied, with importing your headless linux XPUB into the Windows multisig) - since your Linux wallet (or paper wallet) won't be multisig and won't be able to sign transactions for an address it didn't generate (because you created the Linux wallet without your Windows XPUB).
For multisig to work, ALL wallets allowed to sign a transaction have to be created with the XPUB of the other signatory wallets.
In a 2-2 arrangement:
- A has to have XPUB of B
- B has to have XPUB of A
In a 2-3 arrangement:
- A has to have XPUB of B and C
- B has to have XPUB of A and C
- C has to have XPUB of A and B
By doing this, all the wallets that are part of the multisig arrangement will generate the exact same bitcoin addresses. This is how you can check if your multisig system will work.
With Electrum, to my knowledge, you have to use the GUI windows to create multisig wallets - ie. I haven't seen any command line to create them.
For multisig to work, ALL wallets allowed to sign a transaction have to be created with the XPUB of the other signatory wallets.
In a 2-2 arrangement:
- A has to have XPUB of B
- B has to have XPUB of A
In a 2-3 arrangement:
- A has to have XPUB of B and C
- B has to have XPUB of A and C
- C has to have XPUB of A and B
By doing this, all the wallets that are part of the multisig arrangement will generate the exact same bitcoin addresses. This is how you can check if your multisig system will work.
With Electrum, to my knowledge, you have to use the GUI windows to create multisig wallets - ie. I haven't seen any command line to create them.
I was just wondering about using Linux's pubkey on the Windows UI, thanks for clearing that out.
I hope it will be possible to create a multisig wallet via command line in the future, that would be a nice 2FA system.
