def update_denormalised_balance(self):
"""Denormalise the balance for this account."""
raw_balance, last_block_num, last_block_at = self.calculate_sum_from_deltas()
self.set_balance_uint(raw_balance)
self.last_block_updated_at = last_block_at
self.last_block_num = last_block_num
self.balance_calculated_at = now()
def broadcast(self, tx: _PreparedTransaction):
"""Push transactions to Ethereum network."""
if tx.broadcast_account.address != self.address:
raise AddressConfigurationMismatch("Could not broadcast due to address mismatch. A pendign transaction was created for account {}, but we are using configured account {}".format(tx.broadcast_account.addres, self.address))
tx_data = tx.unsigned_payload
signed = self.web3.eth.account.signTransaction(tx_data, self.private_key_hex)
tx.txid = signed.hash.hex()
self.web3.eth.sendRawTransaction(signed.rawTransaction)
tx.broadcasted_at = now()
return tx
def update_status(self, tx: _PreparedTransaction):
"""Update tx status from Etheruem network."""
assert tx.txid
# https://web3py.readthedocs.io/en/stable/web3.eth.html#web3.eth.Eth.getTransactionReceipt
receipt = self.web3.eth.getTransactionReceipt(tx.txid)
if receipt:
tx.result_block_num = receipt["blockNumber"]
# https://ethereum.stackexchange.com/a/6003/620
if receipt["status"] == 0:
tx.result_transaction_success = False
tx.result_transaction_reason = "Transaction failed" # TODO: Need some logic to separate failure modes
else:
tx.result_transaction_success = True
tx.result_fetched_at = now()
return tx
def verify_on_etherscan(logger: Logger, network: str, tx: _PreparedTransaction, api_key: str, session, timeout=120):
"""Verify a contrcact deployment on Etherscan.
Uses https://etherscan.io/apis#contracts
"""
assert network in ("ethereum", "kovan", "ropsten", "rinkerby")
if network != "ethereum":
url = "https://api-{}.etherscan.io/api".format(network)
else:
url = "https://api.etherscan.io/api"
assert tx.result_transaction_success
assert tx.contract_deployment
source = tx.flattened_source_code
assert source.strip(), "Source code missing"
compiler = tx.compiler_version
address = tx.contract_address
constructor_arguments = tx.constructor_arguments
contract_name = tx.contract_name
data = {
"apikey": api_key,
"module": "contract",
"contractaddress": address,
"action": "verifysourcecode",
"sourceCode": source,
"contractname": contract_name,
"compilerversion": "v" + compiler, # https://etherscan.io/solcversions
"constructorArguements": constructor_arguments[2:], # Remove leading 0x
"optimizationUsed": 1, # TODO: Hardcoded
"runs": 500, # TODO: Hardcoded
}
info_data = data.copy()
del info_data["sourceCode"] # Too verbose
del info_data["apikey"] # Security
logger.info("Calling EtherScan API as: %s", info_data)
#
# Step 1: EtherScan validates input and gives us a ticket id to track the submission status
#
resp = session.post(url, data)
# {'status': '0', 'message': 'NOTOK', 'result': 'Error!'}
data = resp.json()
logger.info("Etherscan replied %s", data)
if data["status"] == "0":
if "already verified" in data["result"]:
return
raise CouldNotVerifyOnEtherScan("Could not verify contract: " + address + " " + str(data))
ticket = data["result"]
#
# Step 2: Poll for results
#
ready = False
started = time.time()
while not ready and time.time() < started + timeout:
data = {
"apikey": api_key,
"module": "contract",
"action": "checkverifystatus",
"guid": ticket,
}
logger.info("Checking verification status on EtherScan API as: %s", info_data)
resp = session.post(url, data)
# {'status': '0', 'message': 'NOTOK', 'result': 'Error!'}
data = resp.json()
logger.info("Got reply %s", data)
if data["result"] == "Pending in queue":
# Keep polling
# {'status': '0', 'message': 'NOTOK', 'result': 'Pending in queue'}
time.sleep(5)
continue
elif data["status"] == "0":
# Produced binary did not match
raise CouldNotVerifyOnEtherScan("Could not verify contract: " + address + " " + str(data))
else:
# All good
assert data["status"] == "1" # {'status': '1', 'message': 'OK', 'result': 'Pass - Verified'}
break
# Write to the database that we managed verify the contract
tx.verified_at = now()
tx.verification_info = data