Cancel pending ethereum transactions

cancel_pending.py

import eth_keyfile
from web3 import Account, Web3
from web3.middleware import geth_poa_middleware

w3 = Web3(Web3.HTTPProvider("http://geth.goerli.ethnodes.brainbot.com:8545"))
w3.middleware_onion.inject(geth_poa_middleware, layer=0)
addr = "8f5ea3bb3e99c317b8745918f6973f7afbf659c3"
first_stuck = 226164
stuck_nonces = range(first_stuck, first_stuck + 20)
gas_price = w3.toWei(10, "gwei")

keyfile = eth_keyfile.load_keyfile(addr + ".wallet")
pk = Account.decrypt(keyfile, open(addr + ".key").read())
account = Account.from_key(pk)

for nonce in sorted(stuck_nonces):
    signed = w3.eth.account.sign_transaction(
        dict(
            to=account.address,
            value=0,
            gas=210000,
            gasPrice=gas_price,
            nonce=nonce,
            chainId=w3.eth.chain_id,
        ),
        pk,
    )
    txhash = w3.eth.send_raw_transaction(signed.rawTransaction)
    print(nonce, "->", txhash.hex())