Implement fraud detection dashboard for subscription payments

[Smartdevs17]

Description

Build a fraud detection system for subscription payments with real-time risk scoring, pattern detection, and case management.

Acceptance Criteria

• Risk scoring model for payment transactions
• Fraud pattern detection (velocity, geolocation anomalies)
• Automated action on high-risk payments (hold, block, review)
• Fraud case management dashboard
• Manual review workflow with evidence
• False positive feedback loop for model improvement

Technical Scope

• src/screens/FraudDashboard.tsx
• src/store/fraudStore.ts
• contracts/fraud/src/lib.rs
• Edge: false positive reduction, adversarial adaptation, chargeback handling

[temi-Dee]

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

hi maintainer i can work on this issue

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

[barry01-hash]

@barry01-hash has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Please approve

ℹ️ Repo Maintainers: To accept this application, review their application or assign @barry01-hash to this issue.

[drips-wave]

Congratulations, @barry01-hash! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @barry01-hash: 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 @barry01-hash as part of the Stellar Wave Program's 5th Wave 🥳

Moderator's reason: [Auto-assessed] The contributor has implemented a comprehensive fraud detection system including risk scoring, pattern detection (velocity, geolocation, device), a dashboard for manual reviews, and a false positive feedback loop as requested. The PR directly addresses all acceptance criteria with significant changes across both the smart contract and frontend code, and there are no maintainer objections.

😎 @barry01-hash: 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.