Deploys new PredictionGame contracts and tracks them by creator and token pair

PredictionFactory.sol

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

import "./PredictionGame.sol";

contract PredictionFactory {
    address[] public allGames;
    mapping(address => address[]) public userGames;

    event GameCreated(address game, address creator);

    function createPredictionGame(
        string memory pair,
        uint256 targetPrice,
        uint256 expiry,
        uint256 creatorFee
    ) external {
        PredictionGame game = new PredictionGame(
            msg.sender,
            pair,
            targetPrice,
            expiry,
            creatorFee
        );
        allGames.push(address(game));
        userGames[msg.sender].push(address(game));
        emit GameCreated(address(game), msg.sender);
    }

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

    function getGamesByCreator(address user) external view returns (address[] memory) {
        return userGames[user];
    }
}