// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}

// File: contracts/Arbitrage.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;


interface IWETH {
  function deposit() external payable;
  function withdraw(uint wad) external;
}

contract Arbitrage {
  address public owner;
  mapping(address => bool) public admins;
  address constant public weth = address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);

  modifier restricted() {
    if (msg.sender == owner) _;
  }

  modifier onlyAdmin() {
    if (msg.sender == owner || admins[msg.sender]) _;
  }

  constructor() public {
    owner = msg.sender;
  }

  function addAdmin(address adminAddress, bool isAdmin) external restricted {
    admins[adminAddress] = isAdmin;
  }

  function() external payable {
    deposit();
  }

  function deposit() public payable {
    IWETH(weth).deposit.value(msg.value)();
  }

  function withdraw(uint amount) public onlyAdmin {
    IWETH(weth).withdraw(amount);
    msg.sender.transfer(amount);
  }

  function take(address _token, uint amount) public onlyAdmin {
    IERC20 token = IERC20(_token);
    token.transfer(msg.sender, amount);
  }
}