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add error handling on cancle bundle #103

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add error handling on cancle bundle #103

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f3576a5
add errhandling on cancle bundle
siddharth0a Mar 18, 2025
1df9600
Update simple.py
siddharth0a Mar 18, 2025
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14 changes: 11 additions & 3 deletions examples/simple.py
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Original file line number Diff line number Diff line change
Expand Up @@ -170,7 +170,7 @@ def main() -> None:
block = w3.eth.block_number

# Simulation is only supported on mainnet
if network == "mainnet":
if network == Network.MAINNET:
# Simulate bundle on current block.
# If your RPC provider is not fast enough, you may get "block extrapolation negative"
# error message triggered by "extrapolate_timestamp" function in "flashbots.py".
Expand Down Expand Up @@ -207,8 +207,16 @@ def main() -> None:
break
except TransactionNotFound:
logger.info(f"Bundle not found in block {block + 1}")
cancel_res = w3.flashbots.cancel_bundles(replacement_uuid)
logger.info(f"Canceled {cancel_res}")
try:
cancel_res = w3.flashbots.cancel_bundles(replacement_uuid)
logger.info(f"Canceled {cancel_res}")
except Exception as e:
if "400" in str(e):
logger.warning(
f"Bundle cancellation returned 400 error (bundle may not exist), ignoring: {e}"
)
else:
raise

log_account_balances(w3, sender.address, receiver)

Expand Down