eaf2698d7e
* feat: add polygon logs processing Closes #issue-8 Signed-off-by: Arthurim <arthurbdauphine@gmail.com> * fix: remove unused variables Signed-off-by: Arthurim <arthurbdauphine@gmail.com> * fix: add inspect db Signed-off-by: Arthurim <arthurbdauphine@gmail.com> * fix: remove parenthesis Signed-off-by: Arthurim <arthurbdauphine@gmail.com> Signed-off-by: Arthurim <arthurbdauphine@gmail.com>
339 lines
10 KiB
Python
339 lines
10 KiB
Python
import asyncio
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import logging
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from typing import Dict, List, Optional, Tuple
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from sqlalchemy import orm
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from web3 import Web3
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from mev_inspect.fees import fetch_base_fee_per_gas
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from mev_inspect.schemas.blocks import Block
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from mev_inspect.schemas.liquidations import Liquidation
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from mev_inspect.schemas.receipts import Receipt
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from mev_inspect.schemas.swaps import Swap
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from mev_inspect.schemas.traces import Trace, TraceType
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from mev_inspect.utils import hex_to_int
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logger = logging.getLogger(__name__)
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TOPIC_SWAP = "0xd78ad95fa46c994b6551d0da85fc275fe613ce37657fb8d5e3d130840159d822"
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TOPIC_LIQUIDATION = "0xe413a321e8681d831f4dbccbca790d2952b56f977908e45be37335533e005286"
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UNI_TOKEN_0 = "0x0dfe1681"
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UNI_TOKEN_1 = "0xd21220a7"
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async def _get_logs_for_topics(base_provider, after_block, before_block, topics):
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logs = await base_provider.make_request(
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"eth_getLogs",
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[
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{
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"fromBlock": hex(after_block),
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"toBlock": hex(before_block),
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"topics": topics,
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}
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],
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)
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return logs["result"]
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def _logs_by_tx(logs):
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logs_by_tx = dict()
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for log in logs:
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transaction_hash = log["transactionHash"]
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if transaction_hash in logs_by_tx.keys():
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logs_by_tx[transaction_hash].append(log)
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else:
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logs_by_tx[transaction_hash] = [log]
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return logs_by_tx
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def get_swap(data):
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data = data[2:]
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return (
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int(data[0:64], base=16),
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int(data[64:128], base=16),
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int(data[128:192], base=16),
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int(data[192:256], base=16),
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)
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def get_liquidation(data):
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data = data[2:]
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return (
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int(data[0:64], base=16),
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int(data[64:128], base=16),
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"0x" + data[128 + 24 : 168 + 24],
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)
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async def classify_logs(logs, pool_reserves, w3):
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cswaps = []
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cliquidations = []
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for log in logs:
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topic = log["topics"][0]
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if topic in [TOPIC_SWAP, TOPIC_LIQUIDATION]:
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block = int(log["blockNumber"], 16)
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transaction_hash = log["transactionHash"]
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trace_address = [int(log["logIndex"], 16)]
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first_token = "0x" + log["topics"][1][26:]
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second_token = "0x" + log["topics"][2][26:]
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if topic == TOPIC_SWAP:
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pool_address = log["address"]
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if pool_address in pool_reserves:
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token0, token1 = pool_reserves[pool_address]
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else:
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addr = Web3.toChecksumAddress(pool_address)
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token0, token1 = await asyncio.gather(
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w3.eth.call({"to": addr, "data": UNI_TOKEN_0}),
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w3.eth.call({"to": addr, "data": UNI_TOKEN_1}),
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)
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token0 = w3.toHex(token0)
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token1 = w3.toHex(token1)
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pool_reserves[pool_address] = (token0, token1)
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am0in, am1in, am0out, am1out = get_swap(log["data"])
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swap = Swap(
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abi_name="uniswap_v2",
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transaction_hash=transaction_hash,
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block_number=block,
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trace_address=trace_address,
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contract_address=pool_address,
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from_address=first_token,
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to_address=second_token,
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token_in_address=token0 if am0in != 0 else token1,
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token_in_amount=am0in if am0in != 0 else am1in,
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token_out_address=token1 if am1out != 0 else token0,
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token_out_amount=am0out if am0out != 0 else am1out,
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protocol=None,
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error=None,
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)
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cswaps.append(swap)
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elif topic == TOPIC_LIQUIDATION:
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block = str(block)
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am_debt, am_recv, addr_usr = get_liquidation(log["data"])
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liquidation = Liquidation(
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liquidated_user="0x" + log["topics"][3][26:],
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liquidator_user=addr_usr,
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debt_token_address=second_token,
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debt_purchase_amount=am_debt,
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received_amount=am_recv,
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received_token_address=first_token,
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protocol=None,
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transaction_hash=transaction_hash,
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trace_address=trace_address,
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block_number=block,
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error=None,
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)
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cliquidations.append(liquidation)
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return cswaps, cliquidations
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reserves: Dict[str, Tuple[str, str]] = dict()
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async def get_classified_traces_from_events(
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w3: Web3, after_block: int, before_block: int
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):
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base_provider = w3.provider
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start = after_block
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stride = 300
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while start < before_block:
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begin = start
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end = start + stride if (start + stride) < before_block else before_block - 1
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start += stride
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print("fetching from node...", begin, end, flush=True)
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all_logs = await _get_logs_for_topics(
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base_provider, begin, end, [[TOPIC_SWAP, TOPIC_LIQUIDATION]]
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)
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logs_by_tx = _logs_by_tx(all_logs)
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for tx in logs_by_tx.keys():
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yield await classify_logs(logs_by_tx[tx], reserves, w3)
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async def get_latest_block_number(base_provider) -> int:
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latest_block = await base_provider.make_request(
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"eth_getBlockByNumber",
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["latest", False],
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)
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return hex_to_int(latest_block["result"]["number"])
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async def create_from_block_number(
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w3: Web3,
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block_number: int,
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trace_db_session: Optional[orm.Session],
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) -> Block:
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block_timestamp, receipts, traces, base_fee_per_gas = await asyncio.gather(
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_find_or_fetch_block_timestamp(w3, block_number, trace_db_session),
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_find_or_fetch_block_receipts(w3, block_number, trace_db_session),
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_find_or_fetch_block_traces(w3, block_number, trace_db_session),
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_find_or_fetch_base_fee_per_gas(w3, block_number, trace_db_session),
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)
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miner_address = _get_miner_address_from_traces(traces)
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return Block(
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block_number=block_number,
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block_timestamp=block_timestamp,
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miner=miner_address,
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base_fee_per_gas=base_fee_per_gas,
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traces=traces,
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receipts=receipts,
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)
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async def _find_or_fetch_block_timestamp(
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w3,
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block_number: int,
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trace_db_session: Optional[orm.Session],
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) -> int:
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if trace_db_session is not None:
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existing_block_timestamp = _find_block_timestamp(trace_db_session, block_number)
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if existing_block_timestamp is not None:
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return existing_block_timestamp
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return await _fetch_block_timestamp(w3, block_number)
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async def _find_or_fetch_block_receipts(
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w3,
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block_number: int,
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trace_db_session: Optional[orm.Session],
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) -> List[Receipt]:
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if trace_db_session is not None:
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existing_block_receipts = _find_block_receipts(trace_db_session, block_number)
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if existing_block_receipts is not None:
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return existing_block_receipts
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return await _fetch_block_receipts(w3, block_number)
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async def _find_or_fetch_block_traces(
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w3,
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block_number: int,
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trace_db_session: Optional[orm.Session],
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) -> List[Trace]:
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if trace_db_session is not None:
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existing_block_traces = _find_block_traces(trace_db_session, block_number)
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if existing_block_traces is not None:
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return existing_block_traces
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return await _fetch_block_traces(w3, block_number)
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async def _find_or_fetch_base_fee_per_gas(
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w3,
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block_number: int,
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trace_db_session: Optional[orm.Session],
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) -> int:
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if trace_db_session is not None:
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existing_base_fee_per_gas = _find_base_fee_per_gas(
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trace_db_session, block_number
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)
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if existing_base_fee_per_gas is not None:
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return existing_base_fee_per_gas
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return await fetch_base_fee_per_gas(w3, block_number)
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async def _fetch_block_timestamp(w3, block_number: int) -> int:
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block_json = await w3.eth.get_block(block_number)
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return block_json["timestamp"]
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async def _fetch_block_receipts(w3, block_number: int) -> List[Receipt]:
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receipts_json = await w3.eth.get_block_receipts(block_number)
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return [Receipt(**receipt) for receipt in receipts_json]
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async def _fetch_block_traces(w3, block_number: int) -> List[Trace]:
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traces_json = await w3.eth.trace_block(block_number)
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return [Trace(**trace_json) for trace_json in traces_json]
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def _find_block_timestamp(
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trace_db_session: orm.Session,
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block_number: int,
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) -> Optional[int]:
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result = trace_db_session.execute(
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"SELECT block_timestamp FROM block_timestamps WHERE block_number = :block_number",
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params={"block_number": block_number},
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).one_or_none()
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if result is None:
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return None
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else:
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(block_timestamp,) = result
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return block_timestamp
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def _find_block_traces(
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trace_db_session: orm.Session,
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block_number: int,
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) -> Optional[List[Trace]]:
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result = trace_db_session.execute(
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"SELECT raw_traces FROM block_traces WHERE block_number = :block_number",
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params={"block_number": block_number},
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).one_or_none()
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if result is None:
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return None
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else:
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(traces_json,) = result
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return [Trace(**trace_json) for trace_json in traces_json]
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def _find_block_receipts(
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trace_db_session: orm.Session,
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block_number: int,
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) -> Optional[List[Receipt]]:
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result = trace_db_session.execute(
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"SELECT raw_receipts FROM block_receipts WHERE block_number = :block_number",
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params={"block_number": block_number},
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).one_or_none()
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if result is None:
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return None
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else:
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(receipts_json,) = result
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return [Receipt(**receipt) for receipt in receipts_json]
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def _find_base_fee_per_gas(
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trace_db_session: orm.Session,
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block_number: int,
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) -> Optional[int]:
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result = trace_db_session.execute(
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"SELECT base_fee_in_wei FROM base_fee WHERE block_number = :block_number",
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params={"block_number": block_number},
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).one_or_none()
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if result is None:
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return None
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else:
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(base_fee,) = result
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return base_fee
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def _get_miner_address_from_traces(traces: List[Trace]) -> Optional[str]:
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for trace in traces:
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if trace.type == TraceType.reward:
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return trace.action["author"]
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return None
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def get_transaction_hashes(calls: List[Trace]) -> List[str]:
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result = []
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for call in calls:
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if call.type != TraceType.reward:
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if (
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call.transaction_hash is not None
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and call.transaction_hash not in result
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):
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result.append(call.transaction_hash)
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return result
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