bip32: why can't private ExtendedKey instances convert to `ExtendedPublicKeys` with `TryFrom`?
pezcore opened this issue · comments
It seems that only public ExtendedKey instances can be converted to ExtendedPublicKey instances with TryFrom<ExtendedKey> for ExtendedPublicKey<K>. Why is that? Shouldn't ExtendedPublicKey::try_from() compute the public key even when the given ExtendedKey is private instead of returning Err(Crypto), because this conversion is cheap, unambiguous, and convenient for the user?
When the secp256k1 feature is enabled (which it is by default), it could compute the public key from the private key, yes.
PRs accepted to add this, or I will get around to implementing it eventually.