def get_events_from_receipt(contract, tx_receipt):
result = {}
for i in contract.events._events:
name = i['name']
matching_abi = contract._find_matching_event_abi(name)
# n_matches = len(contract.events.__dict__[name]().processReceipt(tx_receipt))
# print(i['name'], len(contract.events.__dict__[name]().processReceipt(tx_receipt)))
for log in tx_receipt['logs']:
try:
get_event_data(matching_abi, log)
abi_matches = True
except:
abi_matches = False
if log['address'] == contract.address and abi_matches:
if not name in result:
result[name] = 0
result[name] += 1
return result
def populate_roi(infos: List[ExchangeInfo]) -> List[ExchangeInfo]:
for info in infos:
info.roi = list()
exchange = web3.eth.contract(abi=UNISWAP_EXCHANGE_ABI,
address=info.exchange_address)
i = 0
eth_balance, token_balance = 0, 0
for block_number in get_chart_range():
dm_numerator, dm_denominator, trade_volume = 1, 1, 0
while i < len(
info.logs) and info.logs[i]['blockNumber'] < block_number:
log = info.logs[i]
i += 1
topic = log['topics'][0].hex()
if topic == EVENT_TRANSFER:
continue
elif topic == EVENT_ADD_LIQUIDITY:
event = get_event_data(
exchange.events.AddLiquidity._get_event_abi(), log)
eth_balance += event['args']['eth_amount']
token_balance += event['args']['token_amount']
elif topic == EVENT_REMOVE_LIQUIDITY:
event = get_event_data(
exchange.events.RemoveLiquidity._get_event_abi(), log)
eth_balance -= event['args']['eth_amount']
token_balance -= event['args']['token_amount']
elif topic == EVENT_ETH_PURCHASE:
event = get_event_data(
exchange.events.EthPurchase._get_event_abi(), log)
eth_new_balance = eth_balance - event['args']['eth_bought']
token_new_balance = token_balance + event['args'][
'tokens_sold']
dm_numerator *= eth_new_balance * token_new_balance
dm_denominator *= eth_balance * token_balance
trade_volume += event['args']['eth_bought'] / 0.997
eth_balance = eth_new_balance
token_balance = token_new_balance
else:
event = get_event_data(
exchange.events.TokenPurchase._get_event_abi(), log)
eth_new_balance = eth_balance + event['args']['eth_sold']
token_new_balance = token_balance - event['args'][
'tokens_bought']
dm_numerator *= eth_new_balance * token_new_balance
dm_denominator *= eth_balance * token_balance
trade_volume += event['args']['eth_sold']
eth_balance = eth_new_balance
token_balance = token_new_balance
try:
info.roi.append(
RoiInfo(sqrt(dm_numerator / dm_denominator), eth_balance,
token_balance, trade_volume))
except ValueError:
print(info.token_symbol, info.exchange_address)
logging.info('Loaded info about roi of {} exchanges'.format(len(infos)))
return infos
def populate_volume(infos: List[ExchangeInfo]) -> List[ExchangeInfo]:
for info in infos:
volume = list()
info.volume = list()
exchange = web3.eth.contract(abi=UNISWAP_EXCHANGE_ABI,
address=info.exchange_address)
i = 0
total_trade_volume = defaultdict(int)
for block_number in get_chart_range():
trade_volume = defaultdict(int)
while i < len(
info.logs) and info.logs[i]['blockNumber'] < block_number:
log = info.logs[i]
i += 1
topic = log['topics'][0].hex()
if topic == EVENT_ETH_PURCHASE:
event = get_event_data(
exchange.events.EthPurchase._get_event_abi(), log)
trade_volume[event['args'][
'buyer']] += event['args']['eth_bought'] / 0.997
total_trade_volume[event['args'][
'buyer']] += event['args']['eth_bought'] / 0.997
elif topic == EVENT_TOKEN_PURCHASE:
event = get_event_data(
exchange.events.TokenPurchase._get_event_abi(), log)
trade_volume[event['args']
['buyer']] += event['args']['eth_sold']
total_trade_volume[event['args']
['buyer']] += event['args']['eth_sold']
volume.append(trade_volume)
total_volume = sum(total_trade_volume.values())
valuable_traders = {
t
for (t, v) in total_trade_volume.items() if v > total_volume / 1000
}
info.valuable_traders = list(valuable_traders)
for vol in volume:
filtered_vol = defaultdict(int)
for (t, v) in vol.items():
if t in valuable_traders:
filtered_vol[t] = v
else:
filtered_vol['Other'] += v
info.volume.append(filtered_vol)
logging.info('Volumes of {} exchanges populated'.format(len(infos)))
return infos
def get_mix_results(web3: Any,
mixer_instance: Any,
start_block: int,
end_block: int,
batch_size: Optional[int] = None) -> Iterator[MixResult]:
"""
Iterator for all events generated by 'mix' executions, over some block
range (inclusive of `end_block`). Batch eth RPC calls to avoid too many
calls, and holding huge lists of events in memory.
"""
contract_address = mixer_instance.address
event_abi = find_matching_event_abi(mixer_instance.abi,
event_name="LogMix")
batch_size = batch_size or SYNC_BLOCKS_PER_BATCH
while start_block <= end_block:
# Filters are *inclusive* wrt "toBlock", hence the -1 here, and + 1 to
# set start_block before iterating.
to_block = min(start_block + batch_size - 1, end_block)
filter_params = {
'fromBlock': start_block,
'toBlock': to_block,
'address': contract_address,
}
logs = web3.eth.getLogs(filter_params)
for log in logs:
event_data = get_event_data(event_abi, log)
yield _event_args_to_mix_result(event_data.args)
start_block = to_block + 1
def _get_all_event_data(log_entries):
all_event_data = [
get_event_data(topics_to_abi[log_entry['topics'][0]], log_entry)
for log_entry in log_entries
if log_entry['topics'] and log_entry['topics'][0] in topics_to_abi
]
return all_event_data
def standard_token_network_contract(
web3,
contracts_manager,
wait_for_transaction,
token_network_registry_contract,
standard_token_contract,
contract_deployer_address
):
"""Return instance of a deployed TokenNetwork for HumanStandardToken."""
txid = token_network_registry_contract.functions.createERC20TokenNetwork(
standard_token_contract.address
).transact({'from': contract_deployer_address})
tx_receipt = wait_for_transaction(txid)
assert len(tx_receipt['logs']) == 1
event_abi = contracts_manager.get_event_abi(
CONTRACT_TOKEN_NETWORK_REGISTRY,
EVENT_TOKEN_NETWORK_CREATED,
)
decoded_event = get_event_data(event_abi, tx_receipt['logs'][0])
assert decoded_event is not None
assert is_address(decoded_event['args']['token_address'])
assert is_address(decoded_event['args']['token_network_address'])
token_network_address = decoded_event['args']['token_network_address']
token_network_abi = contracts_manager.get_contract_abi(CONTRACT_TOKEN_NETWORK)
return web3.eth.contract(abi=token_network_abi, address=token_network_address)
def test_dynamic_length_argument_extraction(web3,
emitter,
wait_for_transaction,
emitter_log_topics,
emitter_event_ids):
string_0 = "this-is-the-first-string-which-exceeds-32-bytes-in-length"
string_1 = "this-is-the-second-string-which-exceeds-32-bytes-in-length"
txn_hash = emitter.functions.logDynamicArgs(string_0, string_1).transact()
txn_receipt = wait_for_transaction(web3, txn_hash)
assert len(txn_receipt['logs']) == 1
log_entry = txn_receipt['logs'][0]
event_abi = emitter._find_matching_event_abi('LogDynamicArgs')
event_topic = emitter_log_topics.LogDynamicArgs
assert event_topic in log_entry['topics']
string_0_topic = web3.sha3(text=string_0)
assert string_0_topic in log_entry['topics']
event_data = get_event_data(event_abi, log_entry)
expected_args = {
"arg0": string_0_topic,
"arg1": string_1,
}
assert event_data['args'] == expected_args
assert event_data['blockHash'] == txn_receipt['blockHash']
assert event_data['blockNumber'] == txn_receipt['blockNumber']
assert event_data['transactionIndex'] == txn_receipt['transactionIndex']
assert is_same_address(event_data['address'], emitter.address)
assert event_data['event'] == 'LogDynamicArgs'
def _get_all_event_data(log_entries):
all_event_data = [
get_event_data(topics_to_abi[log_entry['topics'][0]], log_entry)
for log_entry in log_entries
if log_entry['topics'] and log_entry['topics'][0] in topics_to_abi
]
return all_event_data
def get_start_order_logs(
self,
web3,
consumer_address=None,
from_block=0,
to_block="latest",
from_all_tokens=False,
):
topic0 = self.get_event_signature(self.ORDER_STARTED_EVENT)
topics = [topic0]
if consumer_address:
topic1 = f"0x000000000000000000000000{consumer_address[2:].lower()}"
topics = [topic0, None, topic1]
filter_params = {
"fromBlock": from_block,
"toBlock": to_block,
"topics": topics
}
if not from_all_tokens:
# get logs only for this token address
filter_params["address"] = self.address
e = getattr(self.events, self.ORDER_STARTED_EVENT)
event_abi = e().abi
logs = web3.eth.getLogs(filter_params)
parsed_logs = []
for lg in logs:
parsed_logs.append(get_event_data(event_abi, lg))
return parsed_logs
def standard_token_network_contract(
web3,
contracts_manager,
wait_for_transaction,
token_network_registry_contract,
standard_token_contract,
contract_deployer_address
):
txid = token_network_registry_contract.transact(
{'from': contract_deployer_address}
).createERC20TokenNetwork(
standard_token_contract.address
)
tx_receipt = wait_for_transaction(txid)
assert len(tx_receipt['logs']) == 1
event_abi = get_event_from_abi(
token_network_registry_contract.abi,
'TokenNetworkCreated'
)
decoded_event = get_event_data(event_abi, tx_receipt['logs'][0])
assert decoded_event is not None
assert is_address(decoded_event['args']['token_address'])
assert is_address(decoded_event['args']['token_network_address'])
token_network_address = decoded_event['args']['token_network_address']
token_network_abi = contracts_manager.get_contract_abi('TokenNetwork')
return web3.eth.contract(abi=token_network_abi, address=token_network_address)
def decode_log(event_name, log):
event_log = get_event_data(event_abi(event_name), log)
decoded_logs = dict(event_log.args)
decoded_logs["block_number"] = event_log.blockNumber
decoded_logs["transaction_index"] = event_log.transactionIndex
decoded_logs["event"] = event_log.event
return decoded_logs
def test_event_data_extraction(web3, emitter, wait_for_transaction,
emitter_log_topics, emitter_event_ids,
contract_fn, event_name, call_args,
expected_args):
function = getattr(emitter.functions, contract_fn)
event_id = getattr(emitter_event_ids, event_name)
txn_hash = function(event_id, *call_args).transact()
txn_receipt = wait_for_transaction(web3, txn_hash)
assert len(txn_receipt['logs']) == 1
log_entry = txn_receipt['logs'][0]
event_abi = emitter._find_matching_event_abi(event_name)
event_topic = getattr(emitter_log_topics, event_name)
is_anonymous = event_abi['anonymous']
if is_anonymous:
assert event_topic not in log_entry['topics']
else:
assert event_topic in log_entry['topics']
event_data = get_event_data(event_abi, log_entry)
assert event_data['args'] == expected_args
assert event_data['blockHash'] == txn_receipt['blockHash']
assert event_data['blockNumber'] == txn_receipt['blockNumber']
assert event_data['transactionIndex'] == txn_receipt['transactionIndex']
assert is_same_address(event_data['address'], emitter.address)
assert event_data['event'] == event_name
def test_get_log(self):
topic, decoded_log = self.decoder.decode_log(self.test_logs[0])
self.assertEqual(topic, encode_hex(keccak(self.event_signature)))
self.assertEqual(
decoded_log,
get_event_data(settings.ETHEREUM_EVENTS[0]['EVENT_ABI'],
self.test_logs[0]))
def test_dynamic_length_argument_extraction(web3, emitter,
wait_for_transaction,
emitter_log_topics,
emitter_event_ids):
string_0 = "this-is-the-first-string-which-exceeds-32-bytes-in-length"
string_1 = "this-is-the-second-string-which-exceeds-32-bytes-in-length"
txn_hash = emitter.functions.logDynamicArgs(string_0, string_1).transact()
txn_receipt = wait_for_transaction(web3, txn_hash)
assert len(txn_receipt['logs']) == 1
log_entry = txn_receipt['logs'][0]
event_abi = emitter._find_matching_event_abi('LogDynamicArgs')
event_topic = emitter_log_topics.LogDynamicArgs
assert event_topic in log_entry['topics']
string_0_topic = web3.sha3(text=string_0)
assert string_0_topic in log_entry['topics']
event_data = get_event_data(event_abi, log_entry)
expected_args = {
"arg0": string_0_topic,
"arg1": string_1,
}
assert event_data['args'] == expected_args
assert event_data['blockHash'] == txn_receipt['blockHash']
assert event_data['blockNumber'] == txn_receipt['blockNumber']
assert event_data['transactionIndex'] == txn_receipt['transactionIndex']
assert is_same_address(event_data['address'], emitter.address)
assert event_data['event'] == 'LogDynamicArgs'
def open_channel(self, partner_address: Address) -> int:
"""Opens channel with a single partner
Parameters:
partner_address - a valid ethereum address of the partner
Return:
channel_id - id of the channel
"""
assert is_checksum_address(partner_address)
assert partner_address in self.client_registry
# disallow multiple open channels with a same partner
if partner_address in self.partner_to_channel_id:
return self.partner_to_channel_id[partner_address]
# if it doesn't exist, register new channel
txid = self.contract.functions.openChannel(
self.address, partner_address, 15).transact({'from': self.address})
assert txid is not None
tx = self.web3.eth.getTransactionReceipt(txid)
assert tx is not None
assert len(tx['logs']) == 1
event = get_event_data(
get_event_from_abi(self.contract.abi, 'ChannelOpened'),
tx['logs'][0])
channel_id = event['args']['channel_identifier']
assert channel_id > 0
assert (is_same_address(event['args']['participant1'], self.address) or
is_same_address(event['args']['participant2'], self.address))
assert (is_same_address(event['args']['participant1'], partner_address)
or is_same_address(event['args']['participant2'],
partner_address))
self.partner_to_channel_id[partner_address] = channel_id
self.client_registry[partner_address].open_channel(self.address)
return channel_id
def _parse_logs(self, txn_receipt):
for log in txn_receipt['logs']:
try:
decoded_log = get_event_data(self.abi, log)
except MismatchedABI:
continue
yield decoded_log
def get_logs(
contract: Contract,
event_name: str,
from_block: Union[int, str] = 0,
to_block: Union[int, str] = 'pending',
argument_filters: Dict[str, Any] = None
):
event_abi = [
abi_element for abi_element in contract.abi
if abi_element['type'] == 'event' and abi_element['name'] == event_name
]
assert len(event_abi) == 1, 'No event found matching name {}.'.format(event_name)
event_abi = event_abi[0]
if argument_filters is None:
argument_filters = {}
filter_params = input_filter_params_formatter(construct_event_filter_params(
event_abi,
argument_filters=argument_filters,
address=contract.address,
fromBlock=from_block,
toBlock=to_block
)[1])
response = _get_logs_raw(contract, filter_params)
logs = log_array_formatter(response)
logs = [dict(log) for log in logs]
for log in logs:
log['args'] = get_event_data(event_abi, log)['args']
return logs
def get_logs(self,
event_name,
from_block=0,
to_block='latest',
filters=None):
filter_kwargs = {
'fromBlock': from_block,
'toBlock': to_block,
'address': self.contract_addr
}
event_abi = [
i for i in self.auction_contract.abi
if i['type'] == 'event' and i['name'] == event_name
][0]
assert event_abi
filters = filters if filters else {}
filter_ = construct_event_filter_params(event_abi,
argument_filters=filters,
**filter_kwargs)[1]
filter_params = input_filter_params_formatter(filter_)
response = self.chain.web3._requestManager.request_blocking(
'eth_getLogs', [filter_params])
logs = log_array_formatter(response)
logs = [dict(log) for log in logs]
for log in logs:
log['args'] = get_event_data(event_abi, log)['args']
return logs
def _parse_logs(self, txn_receipt):
for log in txn_receipt['logs']:
try:
decoded_log = get_event_data(self.abi, log)
except MismatchedABI:
continue
yield decoded_log
def __init__(self, receipt):
self.raw_receipt = receipt
self.transaction_hash = receipt['transactionHash']
self.gas_used = receipt['gasUsed']
self.transfers = []
self.result = None
receipt_logs = receipt['logs']
if (receipt_logs is not None) and (len(receipt_logs) > 0):
self.successful = True
for receipt_log in receipt_logs:
if len(receipt_log['topics']) > 0 and receipt_log['topics'][
0] == '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef':
from pymaker.token import ERC20Token
transfer_abi = [
abi for abi in ERC20Token.abi
if abi.get('name') == 'Transfer'
][0]
event_data = get_event_data(transfer_abi, receipt_log)
self.transfers.append(
Transfer(token_address=Address(event_data['address']),
from_address=Address(
event_data['args']['from']),
to_address=Address(event_data['args']['to']),
value=Wad(event_data['args']['value'])))
else:
self.successful = False
def test_event_data_extraction(web3,
emitter,
wait_for_transaction,
emitter_log_topics,
emitter_event_ids,
contract_fn,
event_name,
call_args,
expected_args):
emitter_fn = getattr(emitter.functions, contract_fn)
event_id = getattr(emitter_event_ids, event_name)
txn_hash = emitter_fn(event_id, *call_args).transact()
txn_receipt = wait_for_transaction(web3, txn_hash)
assert len(txn_receipt['logs']) == 1
log_entry = txn_receipt['logs'][0]
event_abi = emitter._find_matching_event_abi(event_name)
event_topic = getattr(emitter_log_topics, event_name)
is_anonymous = event_abi['anonymous']
if is_anonymous:
assert event_topic not in log_entry['topics']
else:
assert event_topic in log_entry['topics']
event_data = get_event_data(event_abi, log_entry)
assert event_data['args'] == expected_args
assert event_data['blockHash'] == txn_receipt['blockHash']
assert event_data['blockNumber'] == txn_receipt['blockNumber']
assert event_data['transactionIndex'] == txn_receipt['transactionIndex']
assert is_same_address(event_data['address'], emitter.address)
assert event_data['event'] == event_name
def __init__(self, receipt):
self.raw_receipt = receipt
self.transaction_hash = receipt['transactionHash']
self.gas_used = receipt['gasUsed']
self.transfers = []
self.result = None
receipt_logs = receipt['logs']
if (receipt_logs is not None) and (len(receipt_logs) > 0):
self.successful = True
for receipt_log in receipt_logs:
if len(receipt_log['topics']) > 0:
# $ seth keccak $(seth --from-ascii "Transfer(address,address,uint256)")
# 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
if receipt_log['topics'][0] == HexBytes('0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'):
from pymaker.token import ERC20Token
transfer_abi = [abi for abi in ERC20Token.abi if abi.get('name') == 'Transfer'][0]
event_data = get_event_data(transfer_abi, receipt_log)
self.transfers.append(Transfer(token_address=Address(event_data['address']),
from_address=Address(event_data['args']['from']),
to_address=Address(event_data['args']['to']),
value=Wad(event_data['args']['value'])))
# $ seth keccak $(seth --from-ascii "Mint(address,uint256)")
# 0x0f6798a560793a54c3bcfe86a93cde1e73087d944c0ea20544137d4121396885
if receipt_log['topics'][0] == HexBytes('0x0f6798a560793a54c3bcfe86a93cde1e73087d944c0ea20544137d4121396885'):
from pymaker.token import DSToken
transfer_abi = [abi for abi in DSToken.abi if abi.get('name') == 'Mint'][0]
event_data = get_event_data(transfer_abi, receipt_log)
self.transfers.append(Transfer(token_address=Address(event_data['address']),
from_address=Address('0x0000000000000000000000000000000000000000'),
to_address=Address(event_data['args']['guy']),
value=Wad(event_data['args']['wad'])))
# $ seth keccak $(seth --from-ascii "Burn(address,uint256)")
# 0xcc16f5dbb4873280815c1ee09dbd06736cffcc184412cf7a71a0fdb75d397ca5
if receipt_log['topics'][0] == HexBytes('0xcc16f5dbb4873280815c1ee09dbd06736cffcc184412cf7a71a0fdb75d397ca5'):
from pymaker.token import DSToken
transfer_abi = [abi for abi in DSToken.abi if abi.get('name') == 'Burn'][0]
event_data = get_event_data(transfer_abi, receipt_log)
self.transfers.append(Transfer(token_address=Address(event_data['address']),
from_address=Address(event_data['args']['guy']),
to_address=Address('0x0000000000000000000000000000000000000000'),
value=Wad(event_data['args']['wad'])))
else:
self.successful = False
def from_event(cls, event: dict):
assert(isinstance(event, dict))
topics = event.get('topics')
if topics and topics[0] == HexBytes('0x0bcc4c97732e47d9946f229edb95f5b6323f601300e4690de719993f3c371129'):
log_fill_abi = [abi for abi in ZrxExchange.abi if abi.get('name') == 'LogFill'][0]
event_data = get_event_data(log_fill_abi, event)
return LogFill(event_data)
def _get_all_filtered_channels(self, topics_without_signature):
""" get all filtered chanels from blockchain logs """
mpe_address = self.get_mpe_address()
event_signature = self.ident.w3.sha3(text="ChannelOpen(uint256,uint256,address,address,address,bytes32,uint256,uint256)").hex()
topics = [event_signature] + topics_without_signature
logs = self.ident.w3.eth.getLogs({"fromBlock" : self.args.from_block, "address" : mpe_address, "topics" : topics})
abi = get_contract_def("MultiPartyEscrow")
event_abi = abi_get_element_by_name(abi, "ChannelOpen")
channels_ids = [get_event_data(event_abi, l)["args"]["channelId"] for l in logs]
return channels_ids
def get_event(web3contract, event_name, rcpt):
print(rcpt)
if len(rcpt.logs) < 1:
return None
abi = event_abi(web3contract.abi, event_name)
for log in rcpt.logs:
evnt_data = get_event_data(abi, log)
return evnt_data
return None
def from_event(cls, event: dict):
assert isinstance(event, dict)
topics = event.get('topics')
if topics and topics[0] == HexBytes('0x99b5620489b6ef926d4518936cfec15d305452712b88bd59da2d9c10fb0953e8'):
log_bite_abi = [abi for abi in Cat.abi if abi.get('name') == 'Bite'][0]
event_data = get_event_data(log_bite_abi, event)
return Cat.LogBite(event_data)
else:
logging.warning(f'[from_event] Invalid topic in {event}')
def from_event(cls, event: dict):
assert (isinstance(event, dict))
topics = event.get('topics')
if topics and topics[0] == HexBytes('0x259b30ca39885c6d801a0b5dbc988640f3c25e2f37531fe138c5c5af8955d41b'):
log_created_abi = [abi for abi in DSProxyFactory.abi if abi.get('name') == 'Created'][0]
event_data = get_event_data(log_created_abi, event)
return LogCreated(event_data)
else:
raise Exception(f'[from_event] Invalid topic in {event}')
def get_event_data(self, event_name, tx_hash):
tx_logs = self.w3.eth.getTransactionReceipt(tx_hash)['logs']
event_abi = self.contract._find_matching_event_abi(event_name)
matched = []
for log in tx_logs:
try:
d = get_event_data(event_abi, log)
except Exception as e:
continue
matched.append(d)
return matched
def _decode_event_log(self, event: EventAbi, log) -> EventLog:
data = get_event_data(event.abi, log)
args = []
for inp in event.abi["inputs"]:
args.append(data["args"][inp["name"]])
return EventLog(unitname=event.unitname,
contractname=event.contractname,
name=event.name,
address=log["address"],
args=args,
data=data)
def from_event(cls, event: dict, contract_abi: list):
assert isinstance(event, dict)
assert isinstance(contract_abi, list)
topics = event.get('topics')
if topics:
log_note_abi = [abi for abi in contract_abi if abi.get('name') == 'LogNote'][0]
event_data = get_event_data(log_note_abi, event)
return LogNote(event_data)
else:
logging.warning(f'[from_event] Invalid topic in {event}')
def from_event(cls, event: dict):
assert (isinstance(event, dict))
topics = event.get('topics')
if topics and topics[
0] == '0x0d0b9391970d9a25552f37d436d2aae2925e2bfe1b2a923754bada030c498cb3':
log_fill_abi = [
abi for abi in ZrxExchange.abi if abi.get('name') == 'LogFill'
][0]
event_data = get_event_data(log_fill_abi, event)
return LogFill(event_data)
def from_event(cls, event: dict):
assert (isinstance(event, dict))
topics = event.get('topics')
if topics and topics[
0] == '0x3383e3357c77fd2e3a4b30deea81179bc70a795d053d14d5b7f2f01d0fd4596f':
log_take_abi = [
abi for abi in SimpleMarket.abi if abi.get('name') == 'LogTake'
][0]
event_data = get_event_data(log_take_abi, event)
return LogTake(event_data)
def from_event(cls, event: dict, contract_abi: list):
assert isinstance(event, dict)
assert isinstance(contract_abi, list)
log_note_abi = [
abi for abi in contract_abi if abi.get('name') == 'LogNote'
][0]
try:
event_data = get_event_data(log_note_abi, event)
return LogNote(event_data)
except ValueError:
# event is not a LogNote
return None
def _make_order_id_result_function(receipt):
receipt_logs = receipt['logs']
if receipt_logs is not None:
for receipt_log in receipt_logs:
if len(receipt_log['topics']) > 0 and receipt_log['topics'][
0] == '0x773ff502687307abfa024ac9f62f9752a0d210dac2ffd9a29e38e12e2ea82c82':
log_make_abi = [
abi for abi in SimpleMarket.abi
if abi.get('name') == 'LogMake'
][0]
event_data = get_event_data(log_make_abi, receipt_log)
return bytes_to_int(event_data['args']['id'])
return None
def decode_log(self, log):
"""Decodes a retrieved relevant log.
Decoding is performed with the `web3.utils.events.get_event_data` function.
Args:
log (:obj:`dict`): the event log to decode
Returns:
The decoded log.
"""
log_topic = log['topics'][0]
return log_topic, get_event_data(
self.topics_map[log_topic]['EVENT_ABI'], log)
def decode_event(abi: Dict, log: Dict):
""" Helper function to unpack event data using a provided ABI
Args:
abi: The ABI of the contract, not the ABI of the event
log: The raw event data
Returns:
The decoded event
"""
if isinstance(log['topics'][0], str):
log['topics'][0] = decode_hex(log['topics'][0])
elif isinstance(log['topics'][0], int):
log['topics'][0] = decode_hex(hex(log['topics'][0]))
event_id = log['topics'][0]
events = filter_by_type('event', abi)
topic_to_event_abi = {
event_abi_to_log_topic(event_abi): event_abi
for event_abi in events
}
event_abi = topic_to_event_abi[event_id]
return get_event_data(event_abi, log)
def set_log_data(self, log):
log['args'] = get_event_data(self.event_abi, log)['args']
log['event'] = self.event_name
return log
