// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT
// 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: contracts/OwnWallet.sol



// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract OwnWallet {
    address private owner;
    uint256 private passKey;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    constructor() {
        owner = msg.sender;
    }

    receive() external payable {}

    fallback() external payable {}

    function sendToken(
        address _token,
        address _to,
        uint256 _amount,
        uint256 _key
    ) public onlyOwner {
        require(passKey > 0, "PASSKEY_REQUIRED");
        require(passKey == _key, "PASSKEY_MATCH");
        require(
            IERC20(_token).balanceOf(address(this)) >= _amount,
            "AMOUNT_EXCEED"
        );

        IERC20(_token).transfer(_to, _amount);
    }

    function sendTokenAll(
        address _token,
        address _to,
        uint256 _key
    ) public onlyOwner {
        require(passKey > 0, "PASSKEY_REQUIRED");
        require(passKey == _key, "PASSKEY_MATCH");

        uint256 allAmount = IERC20(_token).balanceOf(address(this));
        IERC20(_token).transfer(_to, allAmount);
    }

    function sendETH(address _to, uint256 _key) public onlyOwner {
        require(passKey > 0, "PASSKEY_REQUIRED");
        require(passKey == _key, "PASSKEY_MATCH");

        payable(_to).transfer(address(this).balance);
    }

    function setPassKey(uint256 _key) public onlyOwner {
        passKey = _key;
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "ONLY_OWNER");
        _;
    }

    function transferOwner(address _newOwner) public onlyOwner {
        owner = _newOwner;
    }
}