bitcoinjs/bitcoinjs-lib — pull request #60 by weilu (2014-03-14 02:43:27+00:00)
Title: HD wallet keychain structure

Being compatible with bitcoinj is probably a good idea: https://code.google.com/p/bitcoinj/source/browse/core/src/main/java/com/google/bitcoin/wallet/DeterministicKeyChain.java?name=keychain