[Audit] No tests exist for `TransactionTracker`'s polling and diffing logic

[K1NGD4VID]

Filed from the second-wave repository audit (issue 86/100). See the audit summary for full category context.

• Location: frontend/src/components/TransactionTracker.tsx
• Problem: The polling effect, checkConfirmation, and the renderChanges diffing helper (bigint-based) have no unit tests despite non-trivial logic.
• Evidence: No corresponding test file found.
• Suggested implementation: Add tests for renderChanges given various before/after stream states, and for the polling effect's confirm/timeout behavior using fake timers.
• Acceptance criteria: renderChanges has table-driven tests covering deposit/withdraw/status-change diffs; the polling effect has a test for both confirm and timeout outcomes.
• Difficulty: M
• Expected impact: Covers a component reused across multiple flows (create, top-up, withdraw, incoming) for logic that's easy to silently break.

[devkryssie]

Hi Maintainer! I'd love to take on this issue

[Lacastar2000]

@Lacastar2000 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I will lioke to do this

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[Cmitchelle7]

@Cmitchelle7 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, reviewed the issue in detail. Full stack background with solid experience relevant to this task. No blockers on my end — I'm ready to submit a PR shortly. Please assign.

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[d1a-m3n]

@d1a-m3n has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

hi, i can work on this

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[bamiebot-maker]

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

Hi team! 🦊 I'm ready to tackle this task. My technical background aligns well with this issue, and I can have a clean, tested Pull Request ready for review within your expected timeframe. Please let me assign me so I can begin

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[ayomustap]

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

​Hi maintainer, I would love to work on this issue. I can get started on it right away.

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[Bidex-cmyk]

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

pls assign

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[Ajibose]

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

kindly aSSIGN

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[Akinsuyiphilip]

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

i would love to work on this issue

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[drips-wave]

Congratulations, @Lacastar2000! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Lacastar2000: 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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