[Feature] Auto-validate API requests against OpenAPI spec

[Dev-AdeTutu]

Problem Statement

Manual request validation leads to inconsistencies and missing validations. OpenAPI spec exists but isn't enforced at runtime.

Proposed Solution

Use express-openapi-validator:

• Load openapi.yaml at startup
• Auto-validate all requests
• Return structured 400 errors
• Validate response schemas (dev only)
• Generate validation tests

Affected Component(s)

• Frontend (React / TypeScript)
• Backend / IoT bridge (Node.js)
• Smart contracts (Soroban / Rust)
• Documentation
• Other

[SHEROSE0]

@SHEROSE0 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer i can work on this, kindly assign to me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @SHEROSE0 to this issue.

[Realericky]

@Realericky has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Kindly assign this to me. I will do a solid job

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Realericky to this issue.

[drips-wave]

Congratulations, @Realericky! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Realericky: 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.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

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