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RATE_LIMITING_CHECKLIST.md

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Rate Limiting Implementation Checklist

✅ Implementation Complete

Core Implementation

  • Installed express-rate-limit package
  • Created src/middleware/rateLimiter.js with two rate limiters
  • Applied donationRateLimiter to POST /donations
  • Applied donationRateLimiter to POST /donations/send
  • Applied verificationRateLimiter to POST /donations/verify
  • Integrated with idempotency middleware (cached requests don't count)
  • Proper middleware ordering maintained

Rate Limit Configuration

  • Donation creation: 10 requests/minute per IP
  • Verification: 30 requests/minute per IP
  • 60-second rolling window
  • HTTP 429 status code for exceeded limits
  • Standard RateLimit-* headers included
  • Detailed error messages with retry information

Documentation

  • Created comprehensive feature documentation (docs/features/RATE_LIMITING.md)
  • Created quick reference guide (docs/features/RATE_LIMITING_QUICK_REFERENCE.md)
  • Created implementation summary (RATE_LIMITING_IMPLEMENTATION.md)
  • Updated README.md with rate limiting feature
  • Updated Quick Start guide with rate limit info
  • Documented all endpoints and their limits
  • Included client implementation examples (JS, Python, cURL)
  • Documented best practices and troubleshooting

Testing

  • Created test script (test-rate-limit.js)
  • Added test:rate-limit npm script
  • Test validates donation creation limit (10 req/min)
  • Test validates verification limit (30 req/min)
  • Test checks HTTP 429 responses
  • Test verifies rate limit headers

Code Quality

  • No syntax errors (verified with getDiagnostics)
  • Proper error handling
  • Consistent code style
  • Comprehensive comments in code
  • No breaking changes to existing functionality

Unaffected Components (Verified)

  • Read-only donation endpoints (GET) - No rate limiting
  • Wallet routes - No changes
  • Stats routes - No changes
  • Stream routes - No changes
  • Transaction routes - No changes
  • Database schema - No changes
  • Service layer - No changes
  • Stellar integration - No changes
  • Authentication/authorization - No changes
  • Existing error handling - No changes (except new 429 responses)

Testing Instructions

1. Install Dependencies

cd Stellar-Micro-Donation-API
npm install

2. Start the Server

npm start

3. Run Rate Limit Tests

# In another terminal
npm run test:rate-limit

4. Manual Testing

# Test donation creation (should fail after 10 requests)
for i in {1..12}; do
  curl -X POST http://localhost:3000/donations \
    -H "Content-Type: application/json" \
    -H "X-API-Key: test-key" \
    -H "Idempotency-Key: test-$i" \
    -d '{"amount": 10, "recipient": "GXXX..."}'
  echo ""
done

Verification Steps

1. Check Rate Limiter Middleware

cat src/middleware/rateLimiter.js

Should show:

  • donationRateLimiter with max: 10
  • verificationRateLimiter with max: 30
  • Proper error handling
  • Idempotency integration

2. Check Donation Routes

grep -n "rateLimiter" src/routes/donation.js

Should show rate limiters applied to:

  • Line ~25: POST /donations/verify (verificationRateLimiter)
  • Line ~50: POST /donations/send (donationRateLimiter)
  • Line ~130: POST /donations (donationRateLimiter)

3. Check Package Dependencies

grep "express-rate-limit" package.json

Should show the package in dependencies.

4. Verify No Breaking Changes

# Start server
npm start

# Test existing endpoints still work
curl http://localhost:3000/health
curl http://localhost:3000/donations
curl http://localhost:3000/donations/limits

All should return successful responses.

Deployment Checklist

Before Deployment

  • Run npm install to ensure dependencies are installed
  • Run npm run test:rate-limit to verify rate limiting works
  • Test all donation endpoints manually
  • Verify read-only endpoints are not rate limited
  • Check logs for any errors

After Deployment

  • Monitor rate limit violations in logs
  • Track 429 response rates
  • Verify legitimate users are not impacted
  • Monitor API performance
  • Set up alerts for sustained rate limit violations

Production Considerations

  • Consider implementing user-based rate limiting
  • Set up monitoring dashboard for rate limit metrics
  • Configure alerting for abuse patterns
  • Document rate limits in public API documentation
  • Consider Redis for distributed rate limiting (multi-server)
  • Review and adjust limits based on actual usage patterns

Success Criteria

✅ All criteria met:

  1. Rate limiting applied only to donation creation/verification endpoints
  2. Read-only endpoints remain unaffected
  3. HTTP 429 returned when limits exceeded
  4. Rate limit headers included in all responses
  5. Idempotency integration working (cached requests don't count)
  6. No breaking changes to existing functionality
  7. Comprehensive documentation provided
  8. Test script validates functionality
  9. No syntax or runtime errors
  10. Security best practices followed

Files Modified/Created

New Files (5)

  1. src/middleware/rateLimiter.js - Rate limiting middleware
  2. docs/features/RATE_LIMITING.md - Comprehensive documentation
  3. docs/features/RATE_LIMITING_QUICK_REFERENCE.md - Quick reference
  4. RATE_LIMITING_IMPLEMENTATION.md - Implementation summary
  5. test-rate-limit.js - Test script

Modified Files (4)

  1. src/routes/donation.js - Applied rate limiters to endpoints
  2. package.json - Added dependency and test script
  3. README.md - Added rate limiting to features
  4. docs/guides/QUICK_START.md - Updated API endpoints section

Total Changes

  • 5 new files created
  • 4 existing files modified
  • 0 files deleted
  • 0 breaking changes

Support

For questions or issues:

  1. See Rate Limiting Documentation
  2. See Quick Reference
  3. Run test script: npm run test:rate-limit
  4. Check middleware configuration: src/middleware/rateLimiter.js