Solution: LP-0005 — Private Balance Attestation

[Tranquil-Flow]

Summary

Submitting LP-0005: Private Token Balance Attestation.

Implementation repository: https://github.com/Tranquil-Flow/lp-0005-private-balance-attestation
Narrated demo video: https://youtu.be/x0BYf8bLRII

What is included

• RISC0 private balance threshold proof over the LEZ private account commitment format.
• Privacy-preserving public journal that does not reveal raw npk, exact balance, account identity, or presenter secret material.
• Context binding and Ed25519 presenter binding to prevent replay/proof forwarding.
• Off-chain Logos Messaging-style verifier path.
• Rust verifier-program model for LEZ-style on-chain access grants with deterministic errors.
• Basecamp GUI artifact, SPEL/IDL files, TypeScript SDK facade, benchmark evidence, and reproducibility scripts.
• Standalone consumer-demo/ crate showing the integration surface from a clean external consumer.

Evidence and reproducibility

From the implementation repo:

bash scripts/ci-safe-lane.sh
python3 scripts/validate-submission-package.py
python3 scripts/validate-integrations.py
bash scripts/final-publication-check.sh
cargo run -q -p lp0005-consumer-demo

Notes

The verifier path is submitted as a packaged, testable verifier-program model rather than claiming an unverified public testnet program id. This follows the maintainer clarification that testable demonstration evidence is acceptable; the deployment manifest is structured so a chain-native testnet id and telemetry can be added if reviewers request it.

By submitting this solution, I confirm that I have read and agree to the Terms & Conditions.

[github-actions]

✅ Validation passed

A reviewer will assess against the prize criteria.
ℹ️ Solution submission for LP-0005.
ℹ️ Checking repo: https://github.com/Tranquil-Flow/lp-0005-private-balance-attestation

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Automated check. See solution template and TERMS.