Implement IP Whitelisting for API Keys

[llinsss]

Description:
Allow API key restrictions by IP address.

Tasks:

• Add IP whitelist to API key model
• Validate IP on each request
• Support CIDR notation
• Add IP management endpoints

Files to modify:

• backend/models/ApiKey.js
• backend/middleware/apiKeyAuth.js

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[codewithzubair07]

@codewithzubair07 has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I’d like to take this issue.

I’m Zubair — a backend-focused developer with experience implementing API security controls, request validation middleware, and access restriction mechanisms.

GitHub: https://github.com/codwithzubair07

I’ll:

• Extend the ApiKey model to support IP whitelisting
• Validate incoming request IPs in apiKeyAuth middleware
• Add CIDR notation support for flexible range matching
• Implement secure endpoints for managing whitelisted IPs

I’ll ensure efficient matching logic and proper validation to prevent bypass.

ETA: 4 hours from assignment.

Ready to start immediately 🚀

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[codewithzubair07]

@llinsss Hi 👋

I’ve implemented IP whitelisting for API keys as discussed in #128.

Summary of changes:

Enforced IP validation during API key authentication

Added CIDR support using ip-range-check

Maintained backward compatibility (no whitelist = allow all)

Ensured validation happens before request processing

Please let me know if you’d like the IP management endpoints structured differently or if additional validation is needed.

Looking forward to your feedback

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This issue has been completed by @codewithzubair07 as part of the Stellar Wave Program's 2nd Wave 🥳

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