Add unit tests for JWT token generation and verification utility

[Cjay-Cyber-2]

Description — what to implement and the why/impact.

Authentication relies heavily on JWT issuance and verification, particularly for SEP-10 sessions. Adding thorough unit tests for the JWT helper functions ensures token expiration, signature verification, and payload extraction work reliably.

Context & Requirements — background, constraints, design references, edge cases;

• Grounded in src/utils/ or src/services/ where JWT operations reside.
• Must test successful token creation, correct signature validation, and handling of expired or tampered tokens.

Acceptance Criteria — a checklist ("- [ ] ...") of specific, testable conditions that define "done".

• Create test file for JWT utilities.
• Test signing, verifying valid tokens, and rejecting invalid or expired tokens.
• Ensure all tests pass via Vitest.

Implementation Guidance — likely files/modules to touch

• Likely files: src/utils/jwt.test.ts or similar test file adjacent to JWT utility modules.
• Suggested approach: Utilize jsonwebtoken library and Vitest assertions.

Testing & Validation — how the contributor should prove it works

• Run npm test to verify the new test suite executes and passes.

Submission Guidelines — must open a PR that includes "Closes #"; assignment is required before starting.

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Wave complexity: Trivial

[Glittersup]

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

Hi! I’m interested in this issue. I can trace the existing implementation, identify the appropriate integration points, and implement the change with minimal disruption to the surrounding code. I’ll also cover the relevant tests and edge cases before submitting.

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

[DooseWayo]

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

Can I work on this task?

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

[drips-wave]

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

🧑‍💻 @DooseWayo: 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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