124 lines
3.8 KiB
Python
124 lines
3.8 KiB
Python
from typing import Optional, List, Sequence
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from mev_inspect.schemas.swaps import Swap
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from mev_inspect.schemas.transfers import Transfer, ETH_TOKEN_ADDRESS
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from mev_inspect.schemas.traces import DecodedCallTrace, ClassifiedTrace
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def create_swap_from_transfers(
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trace: DecodedCallTrace,
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recipient_address: str,
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prior_transfers: List[Transfer],
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child_transfers: List[Transfer],
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) -> Optional[Swap]:
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pool_address = trace.to_address
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transfers_to_pool = []
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if trace.value is not None and trace.value > 0:
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transfers_to_pool = [_build_eth_transfer(trace)]
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if len(transfers_to_pool) == 0:
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transfers_to_pool = _filter_transfers(prior_transfers, to_address=pool_address)
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if len(transfers_to_pool) == 0:
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transfers_to_pool = _filter_transfers(child_transfers, to_address=pool_address)
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if len(transfers_to_pool) == 0:
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return None
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transfers_from_pool_to_recipient = _filter_transfers(
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child_transfers, to_address=recipient_address, from_address=pool_address
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)
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if len(transfers_from_pool_to_recipient) != 1:
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return None
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transfer_in = transfers_to_pool[-1]
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transfer_out = transfers_from_pool_to_recipient[0]
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return Swap(
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abi_name=trace.abi_name,
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transaction_hash=trace.transaction_hash,
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block_number=trace.block_number,
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trace_address=trace.trace_address,
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contract_address=pool_address,
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protocol=trace.protocol,
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from_address=transfer_in.from_address,
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to_address=transfer_out.to_address,
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token_in_address=transfer_in.token_address,
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token_in_amount=transfer_in.amount,
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token_out_address=transfer_out.token_address,
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token_out_amount=transfer_out.amount,
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error=trace.error,
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)
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def create_swap_from_transfers_not_including_pool(
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trace: DecodedCallTrace,
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pool_address: str,
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recipient_address: str,
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prior_transfers: List[Transfer],
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child_transfers: List[Transfer],
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) -> Optional[Swap]:
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transfers_from_recipient = _filter_transfers(
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[*prior_transfers, *child_transfers], from_address=recipient_address
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)
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transfers_to_recipient = _filter_transfers(
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child_transfers, to_address=recipient_address
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)
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if len(transfers_from_recipient) != 1 or len(transfers_to_recipient) != 1:
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return None
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transfer_in = transfers_from_recipient[0]
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transfer_out = transfers_to_recipient[0]
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return Swap(
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abi_name=trace.abi_name,
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transaction_hash=trace.transaction_hash,
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block_number=trace.block_number,
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trace_address=trace.trace_address,
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contract_address=pool_address,
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protocol=trace.protocol,
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from_address=transfer_in.from_address,
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to_address=transfer_out.to_address,
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token_in_address=transfer_in.token_address,
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token_in_amount=transfer_in.amount,
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token_out_address=transfer_out.token_address,
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token_out_amount=transfer_out.amount,
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error=trace.error,
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)
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def _build_eth_transfer(trace: ClassifiedTrace) -> Transfer:
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return Transfer(
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block_number=trace.block_number,
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transaction_hash=trace.transaction_hash,
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trace_address=trace.trace_address,
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amount=trace.value,
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to_address=trace.to_address,
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from_address=trace.from_address,
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token_address=ETH_TOKEN_ADDRESS,
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)
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def _filter_transfers(
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transfers: Sequence[Transfer],
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to_address: Optional[str] = None,
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from_address: Optional[str] = None,
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) -> List[Transfer]:
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filtered_transfers = []
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for transfer in transfers:
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if to_address is not None and transfer.to_address != to_address:
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continue
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if from_address is not None and transfer.from_address != from_address:
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continue
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filtered_transfers.append(transfer)
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return filtered_transfers
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