如何在 Python 中使用以太坊私钥签署消息？

Question

On JS I can use ethers to sign message and get v r s

const { utils } = require("ethers");

// for example types = [address, uint256], params = [0x4F..., 100], privateKey=0x45..
const getSignString = (types=undefined, params=undefined, privateKey=undefined) => {
    const digest = utils.keccak256(utils.solidityPack(types, params));
    return new utils.SigningKey(privateKey).signDigest(digest);
  };

// return obj.r, obj.v, obj.s ...

How can i do this on Python?

---

Find answer for my question

def custom_sign_message(types: List, params: List, private_key: str) -> SignMessage:
    """
    Sign message
    types: types of data, for example ["address", "uint256", ...]
    params: params to sign. len(types) == len(params)
    private key: customer private key
    return signed message, containing v, r, s for tests
    """
    signature = Web3.toHex(Web3.soliditySha3(types, params))
    message = encode_defunct(hexstr=signature)
    signed_message = w3.eth.account.sign_message(message, private_key)
    res = eth_account.account.Account.signHash(message.body, private_key)
    return SignMessage(
        v=res.v,
        r=Web3.toHex(res.r),
        s=Web3.toHex(res.s),
        message_hash=signed_message.messageHash,
    )

Answer 1

You can use eth_account sign_message method.

To pack the parameters to binary you can use eth-abi package .