how to verify ethereum message in python

main.py
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric.ec import EllipticCurvePublicKey, EllipticCurveSignature
from cryptography.hazmat.backends import default_backend
from web3 import Web3, HTTPProvider

message = "Hello, Ethereum!"
signature = "0x9a98f80a46c601d879a4ecbfcf6efd823fbe6d4ee6efce913f6215379efa3c3d3d853f37db16612610ab0a34a17d18581d93570928c9b7bf9e2612d6917d83871b"
address = "0x8a5a5e3Dbb9770f23160Ea82Ba45a0C082E775eB"

# Connect to a local Ethereum node
w3 = Web3(HTTPProvider('http://localhost:8545'))

# Get the public key associated with the address
public_key = w3.eth.account.recover_message(message, signature=signature)

# Deserialize the public key string into a `cryptography` public key object
public_key_obj = serialization.load_der_public_key(bytes.fromhex(public_key[2:]), backend=default_backend())

# Deserialize the signature string into a `cryptography` signature object
signature_obj = EllipticCurveSignature.from_hex(signature)

# Verify the signature
try:
    public_key_obj.verify(signature_obj, message.encode('utf-8'), hashes.SHA256())
    print(f"Message verified! Signature is valid for address: {address}")
except Exception as e:
    print(f"Message verification failed: {e}")
1279 chars
28 lines