prob4.py

# 1. Import web3.py
from web3 import Web3

# 2. Create web3.py provider
web3 = Web3(Web3.HTTPProvider("http://143.215.130.235:8545")) # Insert your RPC URL here

caller = "0x1D95c52ec00fce1c4E86f56a26Df021D96451A90"
private_key = "003cb618783a20afec4b5eb7911545c58d9d67be49ca93280a1bac05052678f8"

nonce = web3.eth.get_transaction_count(caller)

contract_address = '0xd7111d1C305B39E327d1f1Ba7e7D0cb57f26Ff09'

abi = [{"inputs":[],"payable":False,"stateMutability":"nonpayable","type":"constructor"},{"payable":True,"stateMutability":"payable","type":"fallback"},{"constant":False,"inputs":[],"name":"donate","outputs":[],"payable":True,"stateMutability":"payable","type":"function"},{"constant":True,"inputs":[],"name":"logmask","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":False,"stateMutability":"view","type":"function"},{"constant":True,"inputs":[],"name":"mask","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":False,"stateMutability":"view","type":"function"},{"constant":False,"inputs":[],"name":"problem1","outputs":[],"payable":True,"stateMutability":"payable","type":"function"},{"constant":False,"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"problem2","outputs":[],"payable":True,"stateMutability":"payable","type":"function"},{"constant":False,"inputs":[],"name":"problem3","outputs":[],"payable":True,"stateMutability":"payable","type":"function"},{"constant":False,"inputs":[],"name":"problem4","outputs":[],"payable":True,"stateMutability":"payable","type":"function"},{"constant":False,"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"problem5","outputs":[],"payable":True,"stateMutability":"payable","type":"function"}]

print(f"Making a call to contract at address: { contract_address }")

# 4. Create contract instance
contract = web3.eth.contract(address=contract_address, abi=abi)

# initialize the chain id, we need it to build the transaction for replay protection
Chain_id = web3.eth.chain_id

transaction = {'chainId': Chain_id, 'from': caller, 'nonce': nonce, 'gas': 1000000, 'gasPrice': web3.to_wei('1', 'gwei'),  'value': web3.to_wei(3.14159265, 'ether') }
# Call your function
call_function = contract.functions.problem4().build_transaction(transaction)

# Sign transaction
signed_tx = web3.eth.account.sign_transaction(call_function, private_key=private_key)

# Send transaction
send_tx = web3.eth.send_raw_transaction(signed_tx.rawTransaction)

# Wait for transaction receipt
tx_receipt = web3.eth.wait_for_transaction_receipt(send_tx)
# print(tx_receipt) # Optional

print(f"Transaction hash: {send_tx.hex()}")