Script to convert Ethereum mnemonic keys into regular private keys that can be consumed by regular wallets. Default parameters work for Ledger ETH wallets, but it should be able to support any wallet that uses BIP32 HD and BIP39 seed standards.
Modularity and extensibility were sacrificed to keep the code as simple and linear as possible. That way it should much easier for you to review this before running it :)
Logic adapted from https://github.com/satoshilabs/slips/blob/master/slip-0010/testvectors.py and https://github.com/trezor/python-mnemonic.
pip install base58 ecdsa
$ echo "legal winner thank year wave sausage worth useful legal winner thank yellow" > myfile
$ ./mnemonic_utils.py myfile
from mnemonic_utils import mnemonic_to_private_key
private_key = mnemonic_to_private_key("legal winner thank year wave sausage worth useful legal winner thank yellow")
import binascii
import eth_keyfile
json_keyfile = eth_keyfile.create_keyfile_json(binascii.unhexlify(private_key), b"any password")
import binascii
from web3.auto import w3
json_keyfile = w3.eth.account.privateKeyToAccount(binascii.unhexlify(private_key)).encrypt(b"any password")
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