Puzzle Completion Certificate NFT Contract

[Mkalbani]

Location: contracts/completion_certificate
Labels: smart-contract, soroban, good first issue
Estimated Time: 5 hours
Difficulty: Easy

Description

Issue verifiable completion certificate NFTs with metadata proving puzzle completion, time, and rank.

Tasks

• Design certificate metadata structure
• Implement certificate minting on completion
• Add verification proof embedding
• Create certificate rarity tiers (time-based)
• Implement certificate display metadata
• Add certificate authenticity verification
• Create certificate showcase/gallery
• Write certificate tests
• Add certificate transfer restrictions
• Implement certificate burning option

Acceptance Criteria

• Certificates minted on puzzle completion
• Metadata includes proof data
• Rarity determined by completion time
• Verification works on-chain
• Showcase functionality operational
• Contract deployed to testnet

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This issue has been added to the Stellar Wave Program and is worth 100 Points.

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[BigJohn-dev]

@BigJohn-dev has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

This issue excites me because it combines the intellectual challenge of deep problem-solving with the tangible impact of improving system reliability, while also offering a valuable learning opportunity. Tackling it would allow me to draw on my experience resolving complex production outages.

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

[drips-wave]

Congratulations, @BigJohn-dev! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

🧑‍💻 @BigJohn-dev: 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.

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