extended private key
index of the child key
the derived private key at the specified index
extended public key
index of the child key
the derived public key at the specified index
extended private key
the fingerprint for this private key (which is based on the corresponding public key)
extended public key
the fingerprint for this public key
random seed
a "master" private key
extended private key
the public key for this private key
(Since version v0.9.17) use encode(pub, prefix (xpub or tpub for example)) instead
see https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki