Build smart contract-based receipt generation and verification

[Smartdevs17]

Description

Create an on-chain receipt system where each payment generates a verifiable receipt stored as a smart contract event, allowing third-party verification without API access.

Acceptance Criteria

• Receipt data structure with all required fields (amount, currency, timestamp, parties)
• Event emission from contract on payment completion
• Receipt verification via Merkle proof
• Receipt PDF generation for download
• Receipt search and retrieval API
• Receipt archiving with configurable retention

Technical Scope

• backend/src/services/receipts.ts
• backend/src/routes/receipts.ts
• contracts/src/lib.rs
• Edge: receipt data size limits, time-based receipt pruning, receipt forgery detection

[Calebux]

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

Please Assign

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

[collinsadi]

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

I'd love to work on this.

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

[drips-wave]

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

🧑‍💻 @collinsadi: 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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🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @collinsadi as part of the Stellar Wave Program's 5th Wave 🥳

😎 @collinsadi: 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.

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