I have created an Ethereum account using web3.py in python 3.6:
web3.personal.newAccount('password') How do I access the private key for that account?
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2 Answers
When you create an account on your node (which w3.personal.newAccount() does), the node hosts the private key; direct access to it is not intended.
If you must have local access to the private key, you can either:
- Generate a new one with
w3.eth.account.create(extra_entropy) - Extract the existing key from your node's keyfile.
If the node is geth, extracting the key looks like:
with open('~/.ethereum/keystore/UTC--...4909639D2D17A3F753ce7d93fa0b9aB12E') as keyfile: encrypted_key = keyfile.read() private_key = w3.eth.account.decrypt(encrypted_key, 'correcthorsebatterystaple') Security tip -- Do not save the key or password anywhere, especially into a shared source file
2 Comments
MUHASIN BABU
When i use this
web3.eth.account.create(extra_entropy) , it doesn't create new account in my node
carver
That's correct. But you can generate a geth-style keyfile that most nodes can import, with
w3.eth.account.encrypt(). See eth-account.readthedocs.io/en/latest/… for parameters and example.Assuming you have been activated personal rpc of your geth, to do this programatically without hardcoding the keystore file directory path in python, do the following:
from web3 import Web3 import eth_keys from eth_account import account w3 = Web3(Web3.HTTPProvider('http://127.0.0.1')) address = '0x...' password = 'password' wallets_list = w3.geth.personal.list_wallets() keyfile_path = (wallets_list[list(i['accounts'][0]['address'] for i in wallets_list).index(address)]['url']).replace("keystore://", "").replace("\\", "/") keyfile = open(keyfile_path) keyfile_contents = keyfile.read() keyfile.close() private_key = eth_keys.keys.PrivateKey(account.Account.decrypt(keyfile_contents, password)) public_key = private_key.public_key private_key_str = str(private_key) public_key_str = str(public_key) 
