anchorpy parser problem

[soundsonacid]

context: processing transaction logs into events for archival purposes with anchorpy

code:

import asyncio
import base64
import binascii

from solana.rpc.async_api import AsyncClient # type: ignore
from solders.signature import Signature # type: ignore

from anchorpy import Wallet, Program, Provider # type: ignore

DRIFT_PROGRAM_ID: str = "dRiftyHA39MWEi3m9aunc5MzRF1JYuBsbn6VPcn33UH"
PROGRAM_LOG: str = "Program log: "
PROGRAM_DATA: str = "Program data: "
PROGRAM_LOG_START_INDEX: int = len(PROGRAM_LOG)
PROGRAM_DATA_START_INDEX: int = len(PROGRAM_DATA)

async def parse_logs(program: Program, logs: list[str]) -> None:
    for log in logs:
        if log.startswith("Log truncated"):
            break

        handle_log(log, program)

def handle_log(
    log: str, program: Program
):
    if log.startswith(PROGRAM_LOG) or log.startswith(PROGRAM_DATA):
        log_str = (
            log[PROGRAM_LOG_START_INDEX:]
            if log.startswith(PROGRAM_LOG)
            else log[PROGRAM_DATA_START_INDEX:]
        )
        try:
            decoded = base64.b64decode(log_str)
        except binascii.Error:
            return 
        # throws here
        event = program.coder.events.parse(decoded)
        print(event)
        return 
    else:
        return
        
async def main():
    connection = AsyncClient("https://api.mainnet-beta.solana.com")
    signature = Signature.from_string("gjVEiXqtWPCbfKtsypL3xvNk8ef2j6D1bo5pHjvL5Bms66TbDozjs7jqusfWj2GhPgDmTojPYgYXtr7AuTk5Y3c")
    wallet = Wallet.dummy()
    provider = Provider(connection, wallet)
    program = await Program.at(DRIFT_PROGRAM_ID, provider)
    logs = (await connection.get_transaction(signature, max_supported_transaction_version=0)).value.transaction.meta.log_messages

    await parse_logs(program, logs)

if __name__ == "__main__":
    asyncio.run(main())

error:

    raise StreamError("stream read less than specified amount, expected %d, found %d" % (length, len(data)), path=path)
construct.core.StreamError: Error in path (parsing) -> discriminator
stream read less than specified amount, expected 8, found 6