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Use a context manager for the input CSV #285

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25 changes: 20 additions & 5 deletions batch_slot_diff.py
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Original file line number Diff line number Diff line change
Expand Up @@ -48,14 +48,29 @@ def main():
tip = w3.eth.block_number
print(f"🌐 Connected (chainId={chain_id}, tip={tip})")

reader = csv.DictReader(open(inp, newline=""))
required = {"address","slot","block_a","block_b"}
if not required.issubset(reader.fieldnames or set()): print(f"❌ CSV must contain: {sorted(required)}"); sys.exit(2)
fieldnames = ["address","slot","block_a","block_b","value_a","value_b","leaf_a","leaf_b","pair_root","changed"]
required = {"address", "slot", "block_a", "block_b"}
fieldnames = [
"address",
"slot",
"block_a",
"block_b",
"value_a",
"value_b",
"leaf_a",
"leaf_b",
"pair_root",
"changed",
]
writer = csv.DictWriter(sys.stdout, fieldnames=fieldnames)
writer.writeheader()

for row in reader:
with open(inp, newline="") as f:
reader = csv.DictReader(f)
if not required.issubset(reader.fieldnames or set()):
print(f"❌ CSV must contain: {sorted(required)}", file=sys.stderr)
sys.exit(2)

for row in reader:
try:
address = checksum(row["address"].strip())
if not Web3.is_address(address): print(f"❌ Invalid address: {row['address']}"); continue
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