77 lines
3.3 KiB
Python
77 lines
3.3 KiB
Python
from typing import List, Optional
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from mev_inspect.schemas.liquidations import Liquidation
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from mev_inspect.schemas.traces import Classification, ClassifiedTrace, Protocol
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from mev_inspect.traces import get_child_traces
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V2_COMPTROLLER_ADDRESS = "0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B"
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V2_C_ETHER = "0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5"
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CREAM_COMPTROLLER_ADDRESS = "0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258"
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CREAM_CR_ETHER = "0xD06527D5e56A3495252A528C4987003b712860eE"
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def get_compound_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 (
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trace.classification == Classification.liquidate
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and (
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trace.protocol == Protocol.compound_v2
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or trace.protocol == Protocol.cream
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)
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and trace.inputs is not None
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and trace.to_address is not None
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):
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# First, we look for cEther liquidations (position paid back via tx.value)
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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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seize_trace = _get_seize_call(child_traces)
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if seize_trace is not None and seize_trace.inputs is not None:
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c_token_collateral = trace.inputs["cTokenCollateral"]
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if trace.abi_name == "CEther":
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liquidations.append(
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Liquidation(
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liquidated_user=trace.inputs["borrower"],
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debt_token_address=c_token_collateral,
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liquidator_user=seize_trace.inputs["liquidator"],
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debt_purchase_amount=trace.value,
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protocol=trace.protocol,
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received_amount=seize_trace.inputs["seizeTokens"],
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transaction_hash=trace.transaction_hash,
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trace_address=trace.trace_address,
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block_number=trace.block_number,
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)
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)
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elif (
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trace.abi_name == "CToken"
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): # cToken liquidations where liquidator pays back via token transfer
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liquidations.append(
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Liquidation(
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liquidated_user=trace.inputs["borrower"],
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debt_token_address=c_token_collateral,
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liquidator_user=seize_trace.inputs["liquidator"],
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debt_purchase_amount=trace.inputs["repayAmount"],
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protocol=trace.protocol,
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received_amount=seize_trace.inputs["seizeTokens"],
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transaction_hash=trace.transaction_hash,
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trace_address=trace.trace_address,
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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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def _get_seize_call(traces: List[ClassifiedTrace]) -> Optional[ClassifiedTrace]:
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"""Find the call to `seize` in the child traces (successful liquidation)"""
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for trace in traces:
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if trace.classification == Classification.seize:
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return trace
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return None
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