import web3 import eth_tester import json eth_params = eth_tester.backends.pyevm.main.get_default_genesis_params({ 'gas_limit': 9000000, }) backend = eth_tester.PyEVMBackend(eth_params) instance = eth_tester.EthereumTester(backend) provider = web3.Web3.EthereumTesterProvider(instance) w3 = web3.Web3(provider) f = open('AccountsIndex.bin', 'r') bytecode = f.read() f.close() f = open('AccountsIndex.abi.json', 'r') abi = json.load(f) f.close() c = w3.eth.contract(abi=abi, bytecode=bytecode) tx_hash = c.constructor().transact({'from': w3.eth.accounts[0]}) r = w3.eth.getTransactionReceipt(tx_hash) c = w3.eth.contract(abi=abi, address=r.contractAddress) fail = False try: c.functions.add(w3.eth.accounts[2]).transact({'from': w3.eth.accounts[1]}) except: fail = True assert fail c.functions.addWriter(w3.eth.accounts[1]).transact({'from': w3.eth.accounts[0]}) c.functions.add(w3.eth.accounts[2]).transact({'from': w3.eth.accounts[1]}) c.functions.add(w3.eth.accounts[3]).transact({'from': w3.eth.accounts[1]}) assert c.functions.count().call() == 3 assert c.functions.accountsIndex(w3.eth.accounts[3]).call() == 2 assert c.functions.accounts(2).call() == w3.eth.accounts[3] fail = False try: c.functions.add(w3.eth.accounts[3]).transact({'from': w3.eth.accounts[1]}) except: fail = True assert fail