Verify N3 transaction signature

verify_tx_sig.py

#!/usr/bin/env python3

from neo3.network.payloads.transaction import Transaction
from neo3.core import cryptography
import binascii
import base64
import json
import sys

MAINNET=860833102
TESTNET=877933390

if len(sys.argv) != 2:
    print(f"Usage: {sys.argv[0]} <raw N3 transaction>")
    sys.exit(1)

txraw = sys.argv[1]
deserialized_tx = Transaction.deserialize_from_bytes(base64.b64decode(txraw))
print(json.dumps(deserialized_tx.to_json(), indent=4))

witnesses = deserialized_tx.witnesses
signature = witnesses[0].invocation_script[2:]
public_key = witnesses[0].verification_script[2:35]
hash_data = deserialized_tx.get_hash_data(MAINNET) 

print("SIGNATURE:" + binascii.hexlify(signature).decode())
print("PUBKEY:" + binascii.hexlify(public_key).decode())
print("HASH_DATA:" +binascii.hexlify(hash_data).decode())

res = cryptography.verify_signature(
    hash_data,
    signature,
    public_key,
    cryptography.ECCCurve.SECP256R1
)

print(f"Verified: {res}")