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PredictionFactory.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "./PredictionGame.sol";

contract PredictionFactory {
    address public immutable owner;

    address[] public allGames;
    mapping(address => address[]) public gamesByCreator;
    mapping(string => address) public priceFeeds; // tokenPair => Chainlink Aggregator
    mapping(address => bool) public isGame;       // Track deployed game addresses

    event GameCreated(
        address indexed creator,
        address indexed game,
        string tokenPair,
        uint256 targetPrice,
        uint256 expiry
    );

    constructor() {
        owner = msg.sender;
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "Not owner");
        _;
    }

    function setPriceFeed(string calldata tokenPair, address feed) external onlyOwner {
        require(feed != address(0), "Invalid feed");
        priceFeeds[tokenPair] = feed;
    }

    function createPredictionGame(
        string calldata tokenPair,        // e.g., "ETH/USD"
        uint256 targetPrice,              // e.g., 3000
        uint256 expiry,                   // e.g., block.timestamp + 2 days
        uint256 creatorFee,               // e.g., 100 = 1%
        uint256 minBetAmount              // e.g., 0.01 ether
    ) external returns (address) {
        address feed = priceFeeds[tokenPair];
        require(feed != address(0), "Feed not set");

        uint256 nowTs = block.timestamp;
        require(expiry > nowTs, "Expiry must be in the future");
        require(expiry <= nowTs + 30 * 365 days, "Max expiry: 30 years");

        PredictionGame game = new PredictionGame(
            msg.sender,
            tokenPair,
            targetPrice,
            expiry,
            creatorFee,
            minBetAmount,
            feed
        );

        address gameAddr = address(game);
        allGames.push(gameAddr);
        gamesByCreator[msg.sender].push(gameAddr);
        isGame[gameAddr] = true;

        emit GameCreated(msg.sender, gameAddr, tokenPair, targetPrice, expiry);
        return gameAddr;
    }

    function getAllGames() external view returns (address[] memory) {
        return allGames;
    }

    function getGamesByCreator(address creator) external view returns (address[] memory) {
        return gamesByCreator[creator];
    }

    function getPriceFeed(string calldata tokenPair) external view returns (address) {
        return priceFeeds[tokenPair];
    }
}