{
  "id": "prediction-market",
  "name": "Prediction Market",
  "category": "advanced",
  "difficulty": "advanced",
  "tags": ["defi", "prediction", "betting", "privacy", "polymarket", "oracle"],
  "description": "Polymarket-style prediction market with encrypted positions and private bet amounts",
  "longDescription": "A fully-featured prediction market where users can bet on binary outcomes (YES/NO) with encrypted amounts. Uses FHE for private bet positions - no one can see how much others are betting. After market resolution, pools are decrypted to calculate proportional payouts. Demonstrates complex FHE patterns: encrypted pools, oracle integration, and payout calculations with mixed encrypted/plaintext operations.",
  "sections": [
    { "id": "setup", "title": "Setup", "description": "Deploy & configure" },
    { "id": "market-creation", "title": "Create Market", "description": "Initialize pools" },
    { "id": "placing-bets", "title": "Place Bets", "description": "Encrypted betting" },
    { "id": "resolution", "title": "Resolution", "description": "Oracle decides" },
    { "id": "claim", "title": "Claim", "description": "Get winnings" }
  ],
  "blocks": [
    {
      "id": "market-struct",
      "type": "struct",
      "lines": [31, 43],
      "explanation": "Market stores encrypted YES/NO pools as euint64. Pool values remain private during betting. decryptedYesPool/decryptedNoPool are set by oracle after resolution for payout calculation."
    },
    {
      "id": "place-bet",
      "type": "function",
      "lines": [96, 120],
      "explanation": "Users bet with encrypted amounts. FHE.add accumulates bets in encrypted pools. Both contract (allowThis) and user (allow) get permissions for their position amounts."
    },
    {
      "id": "claim-winnings",
      "type": "function",
      "lines": [143, 171],
      "explanation": "Payout calculation uses mixed FHE: encrypted user bet multiplied by plaintext total pool, divided by plaintext winning pool. Result is encrypted payout amount."
    }
  ],
  "files": [
    { "path": "contracts/PredictionMarket.sol", "source": "PredictionMarket.sol" },
    { "path": "test/PredictionMarket.test.ts", "source": "PredictionMarket.test.ts" }
  ],
  "fheOperations": ["add", "sub", "mul", "div", "asEuint64", "fromExternal", "allowThis", "allow"],
  "fheTypes": ["euint64", "externalEuint64", "ebool"],
  "relatedTemplates": ["sealed-tender", "dark-pool", "voting"],
  "prerequisites": ["encryption-single", "acl-allow"],
  "nextSteps": ["quadratic-vote", "lottery"]
}