Auditable dark pool

One-line description
Auditable dark pool on Solana: private SOL transfers with 2-of-3 auditable compliance via RLWE threshold decryption.

Submission for Solana Privacy Hack (Jan 12 – Feb 2, 2026).

Project Description

Solana Auditable Dark Pool is a compliance-first privacy solution enabling anonymous SOL transfers with an auditable identity for regulators. we implement a 2-of-3 Threshold Decryption mechanism using RLWE encryption. While users maintain privacy from the public, designated auditors can recover transaction identities if, and only if, a threshold of auditors agree.

Sponsor Technologies Used

• Noir (Aztec): Used to write ZK circuits (noir_circuit for withdrawal, audit_circuit for compliance proof).
• Sunspot (Reilabs): Utilized for compiling Noir circuits into Solana-compatible verifiers and generating proofs via the Go wrapper.
• Helius RPC: All Solana RPC interactions (deposits, withdrawals, state queries) are powered by Helius' high-performance devnet RPC infrastructure.

🪿 URLs

• Presentation Video: {승환님이 채우기}
• Demo: https://zk-rlwe-pool-solana.vercel.app/
• Demo Video: https://www.youtube.com/watch?v=N5k82fqNOAk

Track

Track — Private payments
Build innovative solutions for confidential or private transfers on Solana.

Sponsor Bounties (applicable)

This project also qualifies for the following sponsor bounties:

• Aztec — ZK with Noir
• Helius — Best Privacy Project (leveraging Helius RPC for all Solana interactions)
• Range — Compliant Privacy

Team

• @Scarrots93 — Team lead (Telegram: @Scarrots)
• @ham379888 — Development (Telegram: @Yunsikkkk)

Technical Detail

Core idea: ZK for privacy + RLWE (FHE) for compliance. Two circuits share wa_commitment as the bridge: (1) Shielded Pool proves valid withdrawal; (2) RLWE Audit proves identity is correctly encrypted. No single party can decrypt; only 2-of-3 designated auditors can jointly recover identity via Shamir.

Key mechanism:

• wa_commitment = Poseidon(owner_x, owner_y) — shared public input linking both circuits
• Identity encrypted with RLWE; ZK proves encryption correctness on-chain
• Constant PK optimization: 42x fewer constraints (1.1M → 26K) via negacyclic row hardcoding

Stack: Noir · Sunspot · Pinocchio · BabyJubJub · RLWE + Shamir 2-of-3 · Poseidon · 🪿 Honk

Flow: Initialize (relayer) → Deposit (Merkle root update) → Withdraw (ZK + Audit proof verified on-chain)

Next: WASM proof gen, multi-asset (SPL), relayer network

Telegram @Scarrots

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Disclaimer: Not audited. Use at your own risk.