Add per-holder accrual snapshot query returning currently-owed but unclaimed balance

[greatest0fallt1me]

Description

Integrators need a single-call read that returns each holder's currently-owed dividend balance across all periods. This query walks the accrual ledger and returns a consolidated amount.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Relevant code: src/test_accrual_ledger.rs, src/lib.rs
• Query must be pure and bounded per-holder to avoid unbounded gas

Suggested execution

• Fork the repo and create a branch
• git checkout -b feat/accrual-snapshot-query
• Implement changes
  • Add get_holder_accrued_unclaimed(offering_id, holder) returning i128
  • Sum entries from AccrualLedger since last claim checkpoint
  • Emit read-only tracing when a debug flag is set
• Validate security and correctness assumptions

Test and commit

• Run tests
  • cargo test --all
• Cover edge cases
  • Holder with zero shares and holder never having claimed
• Include test output and security notes

Example commit message

feat: add per-holder accrual snapshot query

Guidelines

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 96 hours

[Glam26]

@Glam26 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi! I'm interested in working on this.

I'll begin by reviewing the affected modules to understand the existing control flow, state transitions, and any external dependencies involved. After identifying the appropriate integration point, I'll implement the requested functionality while preserving existing contracts and minimizing behavioral regressions. I'll also expand the test coverage to include success paths, failure scenarios, and relevant edge cases, then validate the implementation against the project's linting, testing, and build pipeline before submitting a PR.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Glam26 to this issue.

[drips-wave]

Congratulations, @Glam26! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Glam26: 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 🌊

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@Glam26's PR #708 was approved and merged by @thlpkee20-wq.

🏆 @Glam26: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,807 total points). Track your full progress on GrantFox.

👏 Great work, @Glam26! Keep contributing to RevoraOrg.