104 lines
3.1 KiB
Python
104 lines
3.1 KiB
Python
from typing import List, Dict
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from mev_inspect.traces import get_child_traces
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from mev_inspect.schemas.classified_traces import (
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ClassifiedTrace,
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DecodedCallTrace,
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Classification,
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Protocol,
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)
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from mev_inspect.schemas.liquidations import Liquidation
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AAVE_CONTRACT_ADDRESSES: List[str] = [
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# AAVE Proxy
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"0x398ec7346dcd622edc5ae82352f02be94c62d119",
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# AAVE V2
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"0x7d2768de32b0b80b7a3454c06bdac94a69ddc7a9",
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# AAVE V1
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"0x3dfd23a6c5e8bbcfc9581d2e864a68feb6a076d3",
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# AAVE V2 WETH
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"0x030ba81f1c18d280636f32af80b9aad02cf0854e",
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]
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def is_liquidator_payback(trace: ClassifiedTrace, liquidator: str) -> bool:
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"""Finds liquidator payback """
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if isinstance(trace, DecodedCallTrace):
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if "recipient" in trace.inputs:
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if (
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trace.inputs["recipient"] == liquidator
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and trace.from_address in AAVE_CONTRACT_ADDRESSES
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):
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return True
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elif "dst" in trace.inputs:
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if (
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trace.inputs["dst"] == liquidator
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and trace.from_address in AAVE_CONTRACT_ADDRESSES
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):
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return True
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return False
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def get_liquidations(
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traces: List[ClassifiedTrace],
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) -> List[Liquidation]:
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"""Inspect list of classified traces and identify liquidation"""
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liquidations: List[Liquidation] = []
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for trace in traces:
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if trace.classification == Classification.liquidate and isinstance(
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trace, DecodedCallTrace
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):
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liquidator = trace.from_address
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child_traces = get_child_traces(
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trace.transaction_hash, trace.trace_address, traces
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)
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for child in child_traces:
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if child.classification == Classification.liquidate:
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traces.remove(child)
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if is_liquidator_payback(child, liquidator):
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assert isinstance(
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child.inputs, Dict
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) # Necessary for mypy to indentify type
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if "amount" in child.inputs:
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received_amount = int(child.inputs["amount"])
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elif "wad" in child.inputs:
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received_amount = int(child.inputs["wad"])
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else:
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received_amount = 0
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liquidations.append(
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Liquidation(
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liquidated_user=trace.inputs["_user"],
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collateral_token_address=trace.inputs["_collateral"],
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debt_token_address=trace.inputs["_reserve"],
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liquidator_user=liquidator,
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debt_purchase_amount=trace.inputs["_purchaseAmount"],
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protocol=Protocol.aave,
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received_amount=received_amount,
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# aToken lookup is out of scope for now, WIP
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received_token_address=trace.inputs["_collateral"],
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transaction_hash=trace.transaction_hash,
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block_number=trace.block_number,
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)
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)
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return liquidations
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