Add Zod (or similar) validators for API client responses

[josephchimebuka]

Scope

• Validate key payloads (rounds, predictions, leaderboard) before store updates
• Friendly error when schema mismatches

Acceptance criteria

• At least 3 endpoints validated
• Unit tests for invalid payloads

Files

• src/lib/api-client.ts

[brite-side0]

@brite-side0 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi Maintainer,

I’m a smart contract and full-stack developer and would love to contribute to this issue. I’m an experienced contributor with hands-on expertise in Rust, Soroban, Cairo, and TypeScript.

I’m passionate about building secure, scalable blockchain solutions, with a strong emphasis on writing clean and maintainable code. Based on the scope of this issue, I’m confident I can deliver a complete solution within 24 hours of assignment.

I’d greatly appreciate the opportunity to contribute and help move this forward.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @brite-side0 to this issue.

[Teemi2106]

@Teemi2106 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to work on this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Teemi2106 to this issue.

[Benedict315]

@Benedict315 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello please assign me to this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Benedict315 to this issue.

[Topmatrixmor2014]

@Topmatrixmor2014 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Topmatrixmor2014 to this issue.

[drips-wave]

Congratulations, @Benedict315! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Benedict315: 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.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊