[FEATURE] Stellar SDK: Implement path payment (swap) improvements (#14)

[KevinMB0220]

Description

Enhance the path payment functionality in the Stellar SDK integration to support more advanced routing, slippage control, and better error handling.

Background

The current path payment support is basic. To offer full DEX capabilities and advanced DeFi interactions outlined in the roadmap, we need robust swap functionality with slippage protection and optimal pathfinding on the Stellar network.

Requirements

Core Features

• Implement advanced pathfinding queries using Stellar Horizon
• Add automatic slippage calculation and protection
• Support both pathPaymentStrictReceive and pathPaymentStrictSend operations

Technical Considerations

• Integrate with existing Stellar SDK wrapper classes
• Ensure robust error handling for insufficient liquidity or path finding failures

Acceptance Criteria

• Path payments can be executed with defined slippage tolerance
• Optimal paths are correctly retrieved from Horizon
• Unit tests cover path payment variations

[Wittig18]

@Wittig18 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to fix this

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[drips-wave]

Congratulations, @Wittig18! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Wittig18: 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

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[bridgetthnkechi87-cloud]

@bridgetthnkechi87-cloud has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

hello maintainer, i would love to work on this issue.

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[bl4vk-0bsidi4n]

@bl4vk-0bsidi4n has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hii Maintainer,
Please I would love to be assigned this issue to resolve.

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[DanbabaJr]

@DanbabaJr 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
Please assign it to me

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[pageman-bot]

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

Hi Maintainer! I'm a senior developer with experience building high-quality, production-ready software. I'd love to take on this issue and deliver a clean, well-tested solution that aligns with the project's standards. Please assign it to me—I'm ready to get started and contribute effectively.

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[mxrtins04]

@mxrtins04 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

HI maintainer, can i be assigned this issue pleasee?

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[orochimaru144]

@orochimaru144 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.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @orochimaru144 to this issue.

[drips-wave]

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

🧑‍💻 @pageman-bot: 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 🌊