[CT-20] Write Escrow Edge Case Test Suite (10+ tests) in Rust

[devwums]

Problem

Escrow release and refund logic has no test coverage for edge cases. Disputed bookings, boundary cancellation windows, and zero-amount scenarios are entirely untested.

Proposed Solution

Create contracts/cntr/tests/escrow_edge_case_tests.rs. Write at least 10 unit tests covering: normal release after dispute window, release attempt before dispute window closes, refund at exactly 48h boundary, refund at 23h 59m (below 24h), refund at exactly 24h, zero-amount booking refund, 100% refund correct calculation, 50% refund integer division, release blocked because booking not completed, both conditions required for release. All implementation must live inside contracts/cntr/.

Acceptance Criteria

• File at contracts/cntr/tests/escrow_edge_case_tests.rs
• At least 10 test functions
• Tests import escrow_release.rs and escrow_refund.rs peer modules
• Exact boundary values (24h = 86400 seconds, 48h = 172800 seconds) tested
• All tests pass with cargo test

[Jujukoder]

@Jujukoder has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Good Morning Ser, I'm an experienced rust dev, and I can solve this issue. Please assign it to me.

Thank you as you grant my request.

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

[Hassan-oladipupo]

@Hassan-oladipupo has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

can i take this

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

[drips-wave]

Congratulations, @Hassan-oladipupo! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @Hassan-oladipupo: 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.

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