MAX_BIDS_PER_INVOICE saturation stress tests

[Baskarayelu]

Description

Stress-test bid placement at cap with mixed statuses and cleanup interactions.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Align with existing Soroban contract patterns in quicklendx-contracts

Suggested execution

• Fork the repo and create a branch
• git checkout -b feature/max-bids-per-invoice-stress
• Implement changes
• Write contract: src/bid.rs
• Write comprehensive tests: src/test_bid.rs
• Add documentation: docs/contracts/limits.md
• Include NatSpec-style comments (Rust doc comments on public items)
• Validate security assumptions

Test and commit

• Run tests
• Cover edge cases
• Include test output and security notes

Example commit message

feat: stress test max bids per invoice

Guidelines

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

[SamixYasuke]

@SamixYasuke has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Hi maintainer, I'd like to handle this issue

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

[drips-wave]

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

🧑‍💻 @SamixYasuke: 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 🌊

[drips-wave]

This issue has been marked as completed by a Drips Wave moderator for @SamixYasuke as part of the Stellar Wave Program's 3rd Wave 🥳

Moderator's reason: [Auto-assessed] The contributor successfully implemented the requested stress tests and documentation for bid limits. Additionally, they identified and patched a critical authorization vulnerability in the cancel_bid function, which significantly adds value beyond the original scope. The PR #754 has been merged by maintainers and correctly addresses issue #729.

😎 @SamixYasuke: 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.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.

ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.