Oracle - Private Prediction Market (Solana x Arcium)

Oracle is a privacy-focused prediction market prototype where positions are submitted as encrypted payloads and resolved through multi-oracle consensus with dispute controls.

How Arcium Is Used

• The client encrypts the stake and position side locally using the Arcium cluster public key before any network call.
• Only ciphertext and commitment hashes are sent to the backend and written on-chain; no plaintext stake or choice is stored.
• At settlement time, Arcium MPC and threshold decryption produce the final outcome artifacts without exposing individual bets.

Privacy Benefits

• Stake sizes and positions are never sent in plaintext or stored in logs.
• Activity feeds can remain aggregated or redacted to avoid leaking sensitive intent.
• Reduces data leakage and MEV-style inference around who took which side.

Security-Critical Mechanics

• Client-side encrypted stake/choice with a commitment hash; plaintext stakes are not sent to the API.
• Multi-oracle (3-of-5) voting with staking and slashing hooks.
• Settlement challenge window with a mandatory bond to prevent free griefing.
• Authority dispute resolution to uphold or cancel; refunds for cancelled/invalid markets.

Status

Prototype only. Not audited for production use. Development uses a mock Arcium cluster key; production requires a real cluster key.

Required Configuration

• NEXT_PUBLIC_SOLANA_RPC
• NEXT_PUBLIC_PREDICTION_MARKET_PROGRAM_ID (optional override)
• NEXT_PUBLIC_ARCIUM_CLUSTER_ID
• NEXT_PUBLIC_ARCIUM_CLUSTER_PUBKEY (required in production)
• ORACLE_STORE_PATH (required in production for persistence)
• NEWS_API_PROVIDER
• NEWS_API_KEY

Commands

npm run dev
npm run build
npm run test:matrix
npm run audit:backend

License

MIT