Prediction Royale
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.
Videos
Tech Stack
Description
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
Connect Wallet — MetaMask / WalletConnect on Arbitrum Sepolia
Browse/Create Lobby — Set stake, max players, rounds
Join & Wait — Pay stake, wait for players or countdown
Commit Phase (300s) — Submit hashed prediction (YES/NO on price move)
Reveal Phase (60s) — Reveal prediction with salt
Oracle Resolution — Chainlink fetches real price
Elimination — Bottom players removed per round
Repeat — Until 1 player remains or all rounds complete
Payout — Winner 70%, 2nd 20%, 3rd 10% (3% protocol fee)