When you have a global xpub from a PSBT, it's useful to make
sure that a child pubkey can be derived from that psbt. Sometimes
the pubkey derivation comes from a masked and/or blinded xpub.
So we need to combine the child derivation with the global
and confirm that the pubkey can be derived from that source
Parameters
derivation: Bip32Derivation
{Bip32Derivation} - derivation to validate.
This type is from the bitcoinjs-lib bip174 package
When you have a global xpub from a PSBT, it's useful to make sure that a child pubkey can be derived from that psbt. Sometimes the pubkey derivation comes from a masked and/or blinded xpub. So we need to combine the child derivation with the global and confirm that the pubkey can be derived from that source