def past_frob(self, number_of_past_blocks: int, ilk=None) -> List[LogFrob]:
"""Synchronously retrieve a list showing which ilks and urns have been frobbed.
Args:
number_of_past_blocks: Number of past Ethereum blocks to retrieve the events from.
ilk: Optionally filter frobs by ilk.name
Returns:
List of past `LogFrob` events represented as :py:class:`pymaker.dss.Vat.LogFrob` class.
"""
assert isinstance(number_of_past_blocks, int)
assert isinstance(ilk, Ilk) or ilk is None
block_number = self._contract.web3.eth.blockNumber
filter_params = {
'address': self.address.address,
'fromBlock': max(block_number-number_of_past_blocks, 0),
'toBlock': block_number
}
logs = self.web3.eth.getLogs(filter_params)
lognotes = list(map(lambda l: LogNote.from_event(l, Vat.abi), logs))
# '0x7cdd3fde' is Vat.slip (from GemJoin.join) and '0x76088703' is Vat.frob
logfrobs = list(filter(lambda l: l.sig == '0x76088703', lognotes))
logfrobs = list(map(lambda l: Vat.LogFrob(l), logfrobs))
if ilk is not None:
logfrobs = list(filter(lambda l: l.ilk == ilk.name, logfrobs))
return logfrobs
def past_logs(self, from_block: int, to_block: int = None, ilk: Ilk = None,
include_forks=True, include_moves=True, chunk_size=20000) -> List[object]:
"""Synchronously retrieve a unordered list of vat activity, optionally filtered by collateral type.
Args:
from_block: Oldest Ethereum block to retrieve the events from.
to_block: Optional newest Ethereum block to retrieve the events from, defaults to current block
ilk: Optionally filter frobs by ilk.name
chunk_size: Number of blocks to fetch from chain at one time, for performance tuning
Returns:
Unordered list of past `LogFork`, `LogFrob`, and `LogMove` events.
"""
current_block = self._contract.web3.eth.blockNumber
assert isinstance(from_block, int)
assert from_block <= current_block
if to_block is None:
to_block = current_block
else:
assert isinstance(to_block, int)
assert to_block >= from_block
assert to_block <= current_block
assert isinstance(ilk, Ilk) or ilk is None
assert chunk_size > 0
logger.debug(f"Consumer requested frob data from block {from_block} to {to_block}")
start = from_block
end = None
chunks_queried = 0
retval = []
while end is None or start <= to_block:
chunks_queried += 1
end = min(to_block, start+chunk_size)
filter_params = {
'address': self.address.address,
'fromBlock': start,
'toBlock': end
}
logger.debug(f"Querying logs from block {start} to {end} ({end-start} blocks); "
f"accumulated {len(retval)} logs in {chunks_queried-1} requests")
logs = self.web3.eth.getLogs(filter_params)
lognotes = list(map(lambda l: LogNote.from_event(l, Vat.abi), logs))
# '0x7cdd3fde' is Vat.slip (from GemJoin.join) and '0x76088703' is Vat.frob
logfrobs = list(filter(lambda l: l.sig == '0x76088703', lognotes))
logfrobs = list(map(lambda l: Vat.LogFrob(l), logfrobs))
if ilk is not None:
logfrobs = list(filter(lambda l: l.ilk == ilk.name, logfrobs))
retval.extend(logfrobs)
# '0xbb35783b' is Vat.move
if include_moves:
logmoves = list(filter(lambda l: l.sig == '0xbb35783b', lognotes))
logmoves = list(map(lambda l: Vat.LogMove(l), logmoves))
retval.extend(logmoves)
# '0x870c616d' is Vat.fork
if include_forks:
logforks = list(filter(lambda l: l.sig == '0x870c616d', lognotes))
logforks = list(map(lambda l: Vat.LogFork(l), logforks))
if ilk is not None:
logforks = list(filter(lambda l: l.ilk == ilk.name, logforks))
retval.extend(logforks)
start += chunk_size
logger.debug(f"Found {len(retval)} logs in {chunks_queried} requests")
return retval
def past_frobs(self,
from_block: int,
to_block: int = None,
ilk: Ilk = None,
chunk_size=20000) -> List[LogFrob]:
"""Synchronously retrieve a list showing which ilks and urns have been frobbed.
Args:
from_block: Oldest Ethereum block to retrieve the events from.
to_block: Optional newest Ethereum block to retrieve the events from, defaults to current block
ilk: Optionally filter frobs by ilk.name
chunk_size: Number of blocks to fetch from chain at one time, for performance tuning
Returns:
List of past `LogFrob` events represented as :py:class:`pymaker.dss.Vat.LogFrob` class.
"""
current_block = self._contract.web3.eth.blockNumber
assert isinstance(from_block, int)
assert from_block < current_block
if to_block is None:
to_block = current_block
else:
assert isinstance(to_block, int)
assert to_block >= from_block
assert to_block <= current_block
assert isinstance(ilk, Ilk) or ilk is None
assert chunk_size > 0
logger.debug(
f"Consumer requested frob data from block {from_block} to {to_block}"
)
start = from_block
end = None
chunks_queried = 0
retval = []
while end is None or start <= to_block:
chunks_queried += 1
end = min(to_block, start + chunk_size)
filter_params = {
'address': self.address.address,
'fromBlock': start,
'toBlock': end
}
logger.debug(
f"Querying frobs from block {start} to {end} ({end-start} blocks); "
f"accumulated {len(retval)} frobs in {chunks_queried-1} requests"
)
logs = self.web3.eth.getLogs(filter_params)
lognotes = list(map(lambda l: LogNote.from_event(l, Vat.abi),
logs))
# '0x7cdd3fde' is Vat.slip (from GemJoin.join) and '0x76088703' is Vat.frob
logfrobs = list(filter(lambda l: l.sig == '0x76088703', lognotes))
logfrobs = list(map(lambda l: Vat.LogFrob(l), logfrobs))
if ilk is not None:
logfrobs = list(filter(lambda l: l.ilk == ilk.name, logfrobs))
retval.extend(logfrobs)
start += chunk_size
logger.debug(f"Found {len(retval)} frobs in {chunks_queried} requests")
return retval
