Smart Contract: Implement Slippage Protection

[Tybravo]

🎯 Goal

Allow the driver/system to set a maximum slippage tolerance for the AMM swap.

📋 Requirements

• Add slippage params to execute_settlement_swap
• Revert on excessive slippage

📂 Target Directory

Contributors should work within this directory:
contracts/settlement_contract

🔗 Architecture & Dependencies

• Architecture Reference: Smart Contract Architecture Docs
• Dependencies: Implement execute_settlement_swap

🔧 Technical Scope

• Rust
• Soroban SDK

🌿 Fork & Branch

• Fork the repository
• Branch: git checkout -b feat-slippage-protection

✅ Acceptance Criteria

• All tests must pass successfully
• Test cases pass on testnet

💬 Example Commit Message

feat: allow the driver/system to set a maximum slippage tolerance for the amm swap.

[Banx17]

@Banx17 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Please kindly assign me this issue, Im trying to meet my wave monthly target.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Banx17 to this issue.

[David-Adegboyega]

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

can I work on this please?

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

[Windowlight]

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

I’m interested in this issue and believe my experience with contracts, backend systems, and frontend implementation makes me a good fit. Happy to provide updates as I work through it.

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

[promisszn]

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

Hi I’d like to work on this. I have some experience building smart contracts

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

[drips-wave]

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

🧑‍💻 @promisszn: 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 completed by @promisszn as part of the Stellar Wave Program's 5th Wave 🥳

😎 @promisszn: 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. 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.