feat: Resolve #12 - Private Offchain Cash (Unstoppable Hackathon Submission)#14
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…ubmission) Implements Commitment-Nullifier scheme for privacy. - Adds comprehensive test suite (31 tests passing). - Adds interactive demo and research paper. - Complete ErgoScript contract for Ergo blockchain. - Full cryptographic analysis and security proofs. TEAM: Atharva Gadi (Core), Anmol Kadam (QA), Aditya Jadhav (Research). EVENT: Unstoppable Hackathon @ LNMIIT 2025. Deliverables: - Proof-of-Concept implementation in JavaScript (323 lines) - Test suite with 31 passing assertions (461 lines) - Interactive demo with colored output (266 lines) - ErgoScript contracts (197 lines) - Academic research paper (16.5 KB) - Comprehensive documentation Security Properties Verified: Unlinkability between minting and spending Unforgeability - cannot create notes without backing Double-spend prevention via nullifier set No trusted setup required
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Hello maintainers! 👋 Team LNMIIT (Atharva, Anmol, and Aditya) here from the Unstoppable Hackathon. We have successfully implemented the full Private Offchain Cash system as requested in #12. We focused heavily on testing and usability to ensure this isn't just a prototype, but something ready for integration. Quick Review Tips:
We had a blast building this over the last 48 hours! We're standing by for any feedback or requested changes. 🚀 Cheers, |
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🏆 Unstoppable Hackathon Submission - Team LNMIIT
🔒 Private Offchain Cash Implementation
Resolves #12
🏁 Submission Status: COMPLETE
We are proud to present our final submission for the Unstoppable Hackathon @ LNMIIT 2025.
👥 Team Members
🚀 Summary of Work
This PR implements a Commitment-Nullifier scheme to solve the privacy leakage in ChainCash. Unlike the signature-chain model, this ensures that the Reserve cannot link a minting event to a spending event.
⚔️ Competitive Analysis
We chose a Commitment-Nullifier approach over Blind Signatures because it provides better performance and security for this use case:
📦 Key Deliverables
research/private-offchain-cash/poc/private-note-system.jsresearch/private-offchain-cash/contracts/private-reserve.esresearch/private-offchain-cash/RESEARCH_PAPER.mdresearch/private-offchain-cash/TEAM.md📸 How to Test (For Judges)
research/private-offchain-cash/poc.npm install.npm test(See all 31 security tests pass).npm run demo(Interactive walkthrough).Built with ❤️ by Atharva, Anmol, and Aditya.