Add anti-fraud rate limiting to checkout to prevent card storm attacks#775
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vitorrgg wants to merge 1 commit into
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Add anti-fraud rate limiting to checkout to prevent card storm attacks#775vitorrgg wants to merge 1 commit into
vitorrgg wants to merge 1 commit into
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Firestore-backed sliding window rate limiter keyed by delivery address (CEP+number) and real client IP (via X-Forwarded-For). Blocks after 10 attempts per address or 20 per IP within 10 minutes. Returns HTTP 429 before any order or email is created. Firestore docs expire automatically via TTL field. Fails open on Firestore errors. Motivation: card storm attack on barradoce.com.br (20/06/2026) generated 232 orders in 23 minutes, causing SES bounce rate spike and account suspension. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Firestore-backed sliding window rate limiter keyed by delivery address (CEP+number) and real client IP (via X-Forwarded-For). Blocks after 10 attempts per address or 20 per IP within 10 minutes. Returns HTTP 429 before any order or email is created. Firestore docs expire automatically via TTL field. Fails open on Firestore errors.
After deploy TTL will be enabled on Firestore for the checkout_rate_limits collection