Bulk PAN validator¶
Validate a list of PANs (Luhn) and enrich the BIN portion in one pass.
import asyncio
from smartbindb import SmartBinDB
db = SmartBinDB()
def luhn_ok(pan: str) -> bool:
digits = [int(c) for c in pan if c.isdigit()]
checksum = 0
for i, d in enumerate(reversed(digits)):
if i % 2 == 1:
d *= 2
if d > 9:
d -= 9
checksum += d
return checksum % 10 == 0
async def validate(pans):
results = await asyncio.gather(*(db.get_bin_info(p[:8]) for p in pans))
report = []
for pan, result in zip(pans, results):
ok = luhn_ok(pan)
row = {"pan": pan, "luhn": ok}
if result["status"] == "SUCCESS":
d = result["data"][0]
row.update(brand=d["brand"], issuer=d["issuer"], country=d["Country"]["Name"])
else:
row.update(brand="?", issuer="?", country="?")
report.append(row)
return report
if __name__ == "__main__":
pans = ["4571730000000000", "5555555555554444", "378282246310005"]
for r in asyncio.run(validate(pans)):
print(r)