[bitcoin-dev] [Bitcoin-development] New BIP32 structure for P2SH multisig wallets [BIP-45]

[Jonas Schnelli]

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> Perhaps Pedro wants to also participate in a 2-of-2 cosigning 
> arrangement with a merchant that will deliver a laptop to him, so
> Pedro provides this merchant with the same extended public key
> derived from path m/45', and the merchant provides Pedro with his
> own:

What holds you back from using m/i'/45' where i' is your multisig
"account" number?

Within your BIP45 wallet (lets assume Copay), you would not provide
the xpubkey at m/45', instead you would provide your xpubkey at m/i'/45'
.

It's probably no longer pure BIP45.
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