// File: @openzeppelin/contracts@4.9.3/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

// File: TokenPool.sol


pragma solidity ^0.8.0;


contract TokenPool {
    address private _owner;
    address private _tokenAddress;
    mapping (address => bool) private _claimed;
    
    modifier onlyOwner() {
        require(msg.sender == _owner, "Only the owner can call this function");
        _;
    }
    
    constructor(address tokenAddress) {
        _owner = msg.sender;
        _tokenAddress = tokenAddress;
    }
    
    function claim() external {
        require(_claimed[msg.sender] == false, "Claimed already");
        uint256  amount = 1700;

        IERC20 token = IERC20(_tokenAddress);
        require(token.transfer(msg.sender, amount), "Token transfer failed");
        _claimed[msg.sender] = true;
    }
    
    function changeOwner(address newOwner) external onlyOwner {
        _owner = newOwner;
    }
    
    function withdrawTokens(address recipient, uint256 amount) external onlyOwner {
        IERC20 token = IERC20(_tokenAddress);
        require(token.transfer(recipient, amount), "Token transfer failed");
    }
    
    function getContractBalance() external view returns (uint256) {
        IERC20 token = IERC20(_tokenAddress);
        return token.balanceOf(address(this));
    }
}