🛡️ [ZK-SERVICE] Rate Limiting & Denial of Service (DoS) Prevention Middleware

[ayomideadeniran]

📝 Issue Summary

Implement IP and API token rate limiting to protect proof generator endpoints from CPU exhaustion attacks.

❓ Problem or Motivation

Unthrottled POST requests to /generate-proof can crash service CPU resources completely.

💡 Proposed Solution

• Integrate express-rate-limit and redis-rate-limiter.
• Enforce limit of 10 proof generation requests per minute per client IP.
• Return HTTP 429 Too Many Requests with Retry-After headers.

🧩 Affected Areas

• ZK Proof Service (zk-proof-service/server.js)

✅ Checklist

• I have searched for existing issues
• This aligns with the project's goal

[Devadakene]

@Devadakene has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I am skilled enough to work on this issue having worked on something similar in the past. please assign

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[divysam]

@divysam has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello
I would love to work on this issue please

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[drips-wave]

Congratulations, @divysam! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @divysam: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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