Harden schema validation and error mapping in `src/utils/validation.ts`

[Jagadeeshftw]

Description

The current contract leaves malformed inputs too much room to reach downstream code paths. src/utils/validation.ts owns schema validation and error mapping, but the current behavior does not yet define the contract tightly enough for safe maintenance. Design the change so the runtime path, tests, and docs all describe the same behavior.

Requirements and context

• Keep the contract specific to src/utils/validation.ts and its existing callers.
• Add coverage for the success path and the failure or boundary path relevant to this issue.
• Preserve compatibility where older callers or existing tests already rely on the current shape.
• Keep the change easy to review and small enough for one focused PR.

Suggested execution

Fork the repo and create a branch

git checkout -b validation-errors-validate-191

Implement changes

• Update/Write: src/utils/validation.ts
• Write comprehensive tests: src/utils/validation.test.ts
• Add documentation: docs/utils/validation.md
• Keep any new helper names consistent with the rest of src/

Test and commit

• Run pnpm test
• Run pnpm lint
• Add a note for any edge cases that are intentionally out of scope

Example commit message

fix: harden input validation and error handling

Guidelines

• WCAG 2.1 AA is not relevant here; keep the focus on correctness and maintainability.
• Prefer a narrow, well-documented fix over a broad refactor.
• Timeframe: 96 hours

[Clement-coder]

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

Hi,

I’m a full-stack software and blockchain engineer with experience building scalable web apps, backend systems, and blockchain integrations.

I’d love to work on this issue. I’ve reviewed the requirements and have a clear implementation plan to deliver a clean, well-tested solution that meets all acceptance criteria and aligns with the project’s standards.

I can start immediately and provide timely updates throughout the implementation.

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

🧑‍💻 @Clement-coder: 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

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[Jagadeeshftw]

Thanks for applying here. Please also join our Telegram group here: https://t.me/+vTbe0hOUKrFhNTJl. It helps us keep communication clear while we review contributions.

[drips-wave]

This issue has been completed by @Clement-coder as part of the Stellar Wave Program's 7th Wave 🥳

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