75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
import asyncio
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import logging
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import os
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from mev_inspect.block import get_latest_block_number
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from mev_inspect.concurrency import coro
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from mev_inspect.crud.latest_block_update import (
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find_latest_block_update,
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update_latest_block,
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)
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from mev_inspect.db import get_inspect_session, get_trace_session
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from mev_inspect.inspector import MEVInspector
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from mev_inspect.provider import get_base_provider
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from mev_inspect.signal_handler import GracefulKiller
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logging.basicConfig(filename="listener.log", level=logging.INFO)
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logger = logging.getLogger(__name__)
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# lag to make sure the blocks we see are settled
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BLOCK_NUMBER_LAG = 5
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@coro
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async def run():
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rpc = os.getenv("RPC_URL")
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if rpc is None:
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raise RuntimeError("Missing environment variable RPC_URL")
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logger.info("Starting...")
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killer = GracefulKiller()
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inspect_db_session = get_inspect_session()
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trace_db_session = get_trace_session()
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inspector = MEVInspector(rpc, inspect_db_session, trace_db_session)
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base_provider = get_base_provider(rpc)
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latest_block_number = await get_latest_block_number(base_provider)
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while not killer.kill_now:
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last_written_block = find_latest_block_update(inspect_db_session)
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logger.info(f"Latest block: {latest_block_number}")
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logger.info(f"Last written block: {last_written_block}")
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if last_written_block is None:
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# maintain lag if no blocks written yet
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last_written_block = latest_block_number - 1
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if last_written_block < (latest_block_number - BLOCK_NUMBER_LAG):
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block_number = (
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latest_block_number
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if last_written_block is None
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else last_written_block + 1
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)
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logger.info(f"Writing block: {block_number}")
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await inspector.inspect_single_block(block=block_number)
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update_latest_block(inspect_db_session, block_number)
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else:
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await asyncio.sleep(5)
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latest_block_number = await get_latest_block_number(base_provider)
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logger.info("Stopping...")
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if __name__ == "__main__":
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try:
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run()
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except Exception as e:
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logger.error(e)
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