Prediction Markets Show Your Bet Instantly — So I Hid Mine With Zero-Knowledge Proofs

Short summary

The author built Hidden League Forecast, a privacy-focused prediction market MVP on Midnight blockchain where participants' picks stay hidden until reveal time using zero-knowledge proofs. The smart contract, written in Compact, uses witness variables to keep the chosen team, secret key, and salt off-ledger, while only stakes and commitment hashes are publicly recorded. The article walks through the contract code showing how each phase (open, reveal, resolved, claim) protects participant privacy.

• •Built a privacy-preserving prediction market on Midnight blockchain using ZK proofs
• •Compact language enforces secret values stay off-ledger via witness declarations and disclose() type system
• •Only stake amounts and commitment hashes are public; team picks hidden until reveal phase

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