Questions tagged [extended-fingerprint]

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Tips for child key derivation

I am trying to make the child key derivation using the extended keys of the BIP32 document (https://en.bitcoin.it/wiki/BIP_0032). Assuming that an extended key is only a base58 encoded serialization ...
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What is an extended fingerprint (xfp) and how does it differ from an xpub?

Coldcard requires the xfps of all of its cosigners to be able to verify and sign multisig transactions. Providing the coldcard with just the xpubs is not enough, which I believe to mean that the xfp ...