Prediction Royale (PR)

Predict. Compete. Survive. A gamified prediction market where players stake ETH, predict BTC price movements, and compete in elimination rounds until one winner takes the pot.

Features

• Multi-round tournaments — 3–20 rounds per game with progressive elimination

• Commit-reveal scheme — Prevents front-running of predictions using on-chain hashed commitments

• Oracle-powered — Chainlink price feeds for BTC/USD and ETH/USD resolution

• Real-time eliminations — Bottom players eliminated each round

• 70/20/10 payout — Winner takes 70%, 2nd gets 20%, 3rd gets 10%

• ERC-721 badges — Participation NFTs with on-chain SVG metadata

• Live leaderboard — Real-time score updates via Supabase Realtime

• Wallet-first — No email/password. Connect MetaMask, WalletConnect, or Coinbase Wallet

Game Flow

1. Connect Wallet — MetaMask / WalletConnect on Arbitrum Sepolia

2. Browse/Create Lobby — Set stake, max players, rounds

3. Join & Wait — Pay stake, wait for players or countdown

4. Commit Phase (300s) — Submit hashed prediction (YES/NO on price move)

5. Reveal Phase (60s) — Reveal prediction with salt

6. Oracle Resolution — Chainlink fetches real price

7. Elimination — Bottom players removed per round

8. Repeat — Until 1 player remains or all rounds complete

9. Payout — Winner 70%, 2nd 20%, 3rd 10% (3% protocol fee)