extkeys

Implementation of the following BIPs:

• BIP32 (https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki)
• BIP39 (https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki)
• BIP44 (https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki)

Referencing

• https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki
• https://bitcoin.org/en/developer-guide#hardened-keys

Reference Implementations

• https://github.com/btcsuite/btcd/tree/master/btcutil/hdkeychain
• https://github.com/WeMeetAgain/go-hdwallet
• https://github.com/ConsenSys/eth-lightwallet/blob/master/lib/keystore.js
• https://github.com/bitpay/bitcore-lib/tree/master/lib