get_child() has nothing to do with BIP32_PATH

[ranaroussi]

get_child() has nothing to do with BIP32_PATH

Not sure if you ever figured this out, but I'm also seeing inconsistencies. Trying all kinds of things but can't ever seem to get it to match addresses from https://iancoleman.io/bip39/ or the pycoin library I thought about swapping this out with.

Tried some things like

    print('btc child 1')
    print(w.get_child(0).get_child(0).get_child(0).to_address())
    print('btc child 1v2')
    print(w.get_child_for_path("m/44'/0'/0'/0").to_address())

but not matching up at all.

[jonashaag]

Same here

[Abd0s]

Could this be releated too:

Bug Notice

Versions of bitmerchant prior to 0.1.8 contained a caching bug that may have resulted in calls to bip32.Wallet.get_child to return incorrect results. All affected versions were removed from pypi, and no users are known to have been affected by this bug.

The steps to reproduce the bug are unlikely and do not match the typical usage patterns of bitmerchant.

At this time, no users are known to have been affected by this bug.

If you have been affected by this bug and need help recovering any lost or misplaced coins, please contact me directly at [email protected].

The affected versions of bitmerchant have been removed from pypi. They have not been untagged in git.

The two possible failure scenarios are: misplaced coins and stolen coins

https://github.com/sbuss/bitmerchant/blob/master/BUG_NOTICE.rst

[ZenulAbidin]

It seems that the chain codes used for calculating the child keys are completely wrong - it does HMAC on the mnemonic words themselves instead of the 128-bit seed entropy of the mnemonic.

See Wallet.from_master_key for reference. By contrast, HDPrivateKey.from_master_mnemonic method derives correct child keys.

Just put this code at the beginning of from_master_key to fix the bug:

# bip32.py, at the beginning of the file
from mnemonic.mnemonic import mnemonic
from .utils import ensure_bytes

# ...
# in Wallet.from_master_key
    m = Mnemonic(language='english')
    seed = ensure_bytes(m.to_seed(seed))