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Merge pull request #223 from flashbots/aave-zero-bug

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Support aave self-liquidations
This commit is contained in:
Luke Van Seters 2022-01-11 09:49:50 -05:00 committed by GitHub
commit de03b953a0
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 13 deletions
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34
mev_inspect/aave_liquidations.py
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@ -36,13 +36,19 @@ def get_aave_liquidations(
trace.transaction_hash, trace.trace_address, traces trace.transaction_hash, trace.trace_address, traces
) )
(debt_token_address, debt_purchase_amount) = _get_debt_data( (debt_token_address, debt_purchase_amount) = _get_debt_data(
child_traces, liquidator trace, child_traces, liquidator
) )
if debt_purchase_amount == 0:
continue
(received_token_address, received_amount) = _get_received_data( (received_token_address, received_amount) = _get_received_data(
child_traces, liquidator trace, child_traces, liquidator
) )
if received_amount == 0:
continue
liquidations.append( liquidations.append(
Liquidation( Liquidation(
liquidated_user=trace.inputs["_user"], liquidated_user=trace.inputs["_user"],
@ -63,26 +69,26 @@ def get_aave_liquidations(
def _get_received_data( def _get_received_data(
child_traces: List[ClassifiedTrace], liquidator: str liquidation_trace: DecodedCallTrace,
child_traces: List[ClassifiedTrace],
liquidator: str,
) -> Tuple[str, int]: ) -> Tuple[str, int]:
"""Look for and return liquidator payback from liquidation""" """Look for and return liquidator payback from liquidation"""
for child in child_traces: for child in child_traces:
child_transfer: Optional[Transfer] = get_transfer(child) child_transfer: Optional[Transfer] = get_transfer(child)
if child_transfer is not None: if child_transfer is not None and child_transfer.to_address == liquidator:
return child_transfer.token_address, child_transfer.amount
if child_transfer.to_address == liquidator: return liquidation_trace.inputs["_collateral"], 0
return child_transfer.token_address, child_transfer.amount
raise RuntimeError("Transfer from AAVE to liquidator not found!")
def _get_debt_data( def _get_debt_data(
child_traces: List[ClassifiedTrace], liquidator: str liquidation_trace: DecodedCallTrace,
child_traces: List[ClassifiedTrace],
liquidator: str,
) -> Tuple[str, int]: ) -> Tuple[str, int]:
"""Get transfer from liquidator to AAVE""" """Get transfer from liquidator to AAVE"""
@ -93,7 +99,9 @@ def _get_debt_data(
if child_transfer is not None: if child_transfer is not None:
if child_transfer.from_address == liquidator: if child_transfer.from_address == liquidator:
return child_transfer.token_address, child_transfer.amount return child_transfer.token_address, child_transfer.amount
raise RuntimeError("Transfer from liquidator to AAVE not found!") return (
liquidation_trace.inputs["_reserve"],
0,
)