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PREWAVE-BE-069 — Add Leader Election and Fencing for Singleton Background Jobs #666
Description
Problem context
Source audit identified this distinct API production-readiness boundary.
Technical scope
Use DB/Redis leases with fencing tokens for migrations, rebuilds, retention, schedulers, and reconciliation jobs.
Required tests
Two workers, lease expiry, clock skew, partition, slow holder, restart, and stale token tests.
Acceptance criteria
- At most one current leader mutates a singleton job.
- Stale leaders are fenced.
- Lease loss stops work safely.
- Takeover is bounded/audited.
Constraints
Canonical finalized contract events remain authoritative. Bind chain data to chain/release/artifact provenance; fail closed on stale, ambiguous, unauthorized, or incomplete state. Do not weaken CI or expose secrets/protected data.
Dependencies
- PREWAVE-BE-037 (PREWAVE-BE-037 — Prove V2 Outbox Idempotency Under Concurrent Workers #633)
- PREWAVE-BE-055 (PREWAVE-BE-055 — Serialize Database Migrations With Advisory Locks #650)
Non-goals
Unrelated work, mainnet deployment, or applying Stellar Wave before maintainer activation.
Complexity and points
- High — 200 points
Candidate only; activation remains maintainer-controlled.
Activity
Olabsy19 commentedon Oct 15, 2026
@Olabsy19 has applied to work on this issue as part of the Stellar Wave Program's 10th wave.
ℹ️ Repo Maintainers: To accept this application, review their application or assign @Olabsy19 to this issue.
mubking commentedon Oct 15, 2026
Hi, I'm Mubarak — a Full-Stack & Blockchain Developer with 3+ years of experience. I've reviewed this issue and I'm confident I can handle it. I'll submit a clean PR within 2–3 days. Please assign it to me!
drips-wave commentedon Oct 16, 2026
Congratulations, @Olabsy19! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on October 22, 2026.
🧑💻 @Olabsy19: 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
When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.
🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.
🌊 Happy Wave 🌊
fix: PREWAVE-BE-069 — Add Leader Election and Fencing for Singlet (Di…
drips-wave commentedon Oct 20, 2026
This issue has been completed by @Olabsy19 as part of the Stellar Wave Program's 10th Wave 🥳
😎 @Olabsy19: You earned 200 Points for completing this issue! Once the Wave's rewards are finalized, 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.
🧑💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.