Re: BIP0032 Hierarchical Deterministic Wallet key generator bip32utils (Python)

Disclaimer: Don't expect much from me. I'm not a programmer and only created a GitHub account so I could comment on a Regex Golf Gist.

So far I've just been playing with the basics.

I generated BIP0032 test vector #1 using the command in your readme and got the desired result.

I then created my own master key with bip32gen and used your Base58 module to decompose the output and compare it with the serialisation format as specified by BIP0032. I managed to recover the private key just fine.

Code:

$ bip32gen -i entropy -f /dev/random -n 128 -o privkey,xprv -F - -X m
aec8cfc47b43d518e1c6ce27ca2035af7f598f39e10748be395a27be23dcf1ee
xprv9s21ZrQH143K3E8CHFyZactH1tY5gnofwvtELcdtUeZuewTYh32z1sQdBfCdUdc1CcGAMVLddqUK9ioP6NGRtPNRAbFRp6RLbte1iVqduC2

Code:

>>> Base58.decode('xprv9s21ZrQH143K3E8CHFyZactH1tY5gnofwvtELcdtUeZuewTYh32z1sQdBfCdUdc1CcGAMVLddqUK9ioP6NGRtPNRAbFRp6RLbte1iVqduC2').encode('hex')[92:-8]
'aec8cfc47b43d518e1c6ce27ca2035af7f598f39e10748be395a27be23dcf1ee'

I did have a quick look at the code but I didn't get so far with it. I got a little confused as your style changed. For example, compare the extended key version handling in fromExtendedKey

Code:

# Verify address version/type
   version = raw[:4]
   if version.encode('hex') == '0488ade4':
   keytype = 'xprv'
   elif version.encode('hex') == '0488b21e':
   keytype = 'xpub'
   else:
   raise ValueError("unknown extended key version")

to that in ExtendedKey

Code:

version = '\x04\x88\xB2\x1E' if private is False else '\x04\x88\xAD\xE4'

On this topic: Would 0x0488ade4 and 0x0488b21e be better as module constants? How easy would it be to add support for testnet keys?

That's all I have time for today. Hopefully I'll find time to move some funds around tomorrow.