mev-inspect-py/mev_inspect/aave_liquidations.py
2021-10-12 20:13:59 -04:00

89 lines
2.7 KiB
Python

from typing import List
from mev_inspect.traces import (
get_child_traces,
is_child_of_any_address,
)
from mev_inspect.schemas.classified_traces import (
ClassifiedTrace,
DecodedCallTrace,
Classification,
Protocol,
)
from mev_inspect.schemas.liquidations import Liquidation
from mev_inspect.transfers import get_transfer
AAVE_CONTRACT_ADDRESSES: List[str] = [
# AAVE Proxy
"0x398ec7346dcd622edc5ae82352f02be94c62d119",
# AAVE V2
"0x7d2768de32b0b80b7a3454c06bdac94a69ddc7a9",
# AAVE V1
"0x3dfd23a6c5e8bbcfc9581d2e864a68feb6a076d3",
# AAVE V2 WETH
"0x030ba81f1c18d280636f32af80b9aad02cf0854e",
# AAVE AMM Market DAI
"0x79bE75FFC64DD58e66787E4Eae470c8a1FD08ba4",
]
def get_aave_liquidations(
traces: List[ClassifiedTrace],
) -> List[Liquidation]:
"""Inspect list of classified traces and identify liquidation"""
liquidations: List[Liquidation] = []
parent_liquidations: List[List[int]] = []
for trace in traces:
if (
trace.classification == Classification.liquidate
and isinstance(trace, DecodedCallTrace)
and not is_child_of_any_address(trace, parent_liquidations)
):
parent_liquidations.append(trace.trace_address)
liquidator = trace.from_address
child_traces = get_child_traces(
trace.transaction_hash, trace.trace_address, traces
)
received_amount = _get_liquidator_payback(child_traces, liquidator)
liquidations.append(
Liquidation(
liquidated_user=trace.inputs["_user"],
collateral_token_address=trace.inputs["_collateral"],
debt_token_address=trace.inputs["_reserve"],
liquidator_user=liquidator,
debt_purchase_amount=trace.inputs["_purchaseAmount"],
protocol=Protocol.aave,
received_amount=received_amount,
transaction_hash=trace.transaction_hash,
trace_address=trace.trace_address,
block_number=trace.block_number,
)
)
return liquidations
def _get_liquidator_payback(
child_traces: List[ClassifiedTrace], liquidator: str
) -> int:
for child in child_traces:
if child.classification == Classification.transfer:
child_transfer = get_transfer(child)
if (
child_transfer is not None
and child_transfer.to_address == liquidator
and child.from_address in AAVE_CONTRACT_ADDRESSES
):
return child_transfer.amount
return 0