Fix potential timestamp manipulation vulnerability

[ISTIFANUS-N]

Description

Timestamp-dependent logic could be manipulated without proper validation.

Affected Files

• Multiple modules using timestamps

Acceptance Criteria

• Add timestamp bounds checking
• Implement monotonicity checks
• Add skew tolerance

[Airstarr]

@Airstarr has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

I would like to work on this issue, Kindly assign me the issue.

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

[drips-wave]

Congratulations, @Airstarr! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @Airstarr: 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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🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @Airstarr as part of the Stellar Wave Program's 4th Wave 🥳

😎 @Airstarr: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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