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Improve connect() message and send errors to stderr #263

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Improve connect() message and send errors to stderr #263

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4 changes: 3 additions & 1 deletion slot_change_finder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -19,9 +19,11 @@ def checksum(addr: str) -> str:
def connect(url: str) -> Web3:
w3 = Web3(Web3.HTTPProvider(url, request_kwargs={"timeout": 30}))
if not w3.is_connected():
print("❌ Failed to connect to RPC. Check RPC_URL."); sys.exit(1)
print("❌ Failed to connect to RPC. Check RPC_URL or use --rpc.", file=sys.stderr)
sys.exit(1)
return w3


@lru_cache(maxsize=8192)
def storage_at(w3_provider_uri: str, address: str, slot: int, block_number: int) -> bytes:
# cache key uses provider URI string via decorator arg; w3 constructed per call to avoid unhashable
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