Implement efficient payment processing with optimistic updates

[RUKAYAT-CODER]

Background

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Description

Show purchase success immediately (optimistic update) while verifying on backend to improve perceived performance.

Current Behavior

Wait for payment server response before updating UI

Expected Behavior

Optimistic update with verification

Impact

⚡ Instant purchase feedback
🎯 Better purchase UX
✨ Improved conversion perception

Acceptance Criteria

• Implement optimistic purchase update
• Show success immediately
• Verify on backend async
• Rollback if failed
• Test happy/sad paths
• Document payment pattern

Implementation Hints

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Related Issues

• Implement Mobile Authentication Flow #6
• No Authentication Guard #59
• Store Missing Persistence #97

[oscarj007]

@oscarj007 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I have the necessary skills and experience for solving this issue,permit me to take up this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @oscarj007 to this issue.

[drips-wave]

Congratulations, @oscarj007! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @oscarj007: 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 🌊