lightninglabs / taproot-assets / 12789711006

Pull #1290

github

asset: turn Pederson key into xpub for hardware wallet support

Hardware wallets that support miniscript policies only accept a
pk() fragment that specifies an extended key, for example with:
pk(@1/<0;1>/*). When signing the transaction the actual derivation path
to use (for example 0/0) is defined in the PSBT itself. So the signing
policy is generic and the user only has to accept it once.
A child key derived from an extended NUMS key is still a NUMS key, as
it's just tweaked again. The initial private key is still unknown.

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