faucet for erc20 and ETH

Faucet.sol

pragma solidity ^0.4.24;

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
contract Ownable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    constructor () internal {
        _owner = msg.sender;
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @return the address of the owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner());
        _;
    }

    /**
     * @return true if `msg.sender` is the owner of the contract.
     */
    function isOwner() public view returns (bool) {
        return msg.sender == _owner;
    }

    /**
     * @dev Allows the current owner to relinquish control of the contract.
     * @notice Renouncing to ownership will leave the contract without an owner.
     * It will not be possible to call the functions with the `onlyOwner`
     * modifier anymore.
     */
    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Allows the current owner to transfer control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0));
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

/**
 * @dev Faucet rate limit
 */
contract Faucet is Ownable {
  
  mapping(address => uint256) public lastFaucets;
  uint256 private amount;

  constructor () public
  {
    amount = 3;
  }

  function updateAmount(uint256 _amount) public onlyOwner {
    amount = _amount;
  }
   function() payable {}
  /**
  * faucet
  */
  function faucet(
    address _to
  )
  public
  payable
  {
    require(block.number - lastFaucets[_to] > 10);
    lastFaucets[_to] = block.number;
    _to.transfer(amount);
  }
}
interface IERC20 {
    function totalSupply() external view returns (uint256);

    function balanceOf(address who) external view returns (uint256);

    function allowance(address owner, address spender) external view returns (uint256);

    function transfer(address to, uint256 value) external returns (bool);

    function approve(address spender, uint256 value) external returns (bool);

    function transferFrom(address from, address to, uint256 value) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);

    event Approval(address indexed owner, address indexed spender, uint256 value);
}

/**
 * @dev Faucet rate limit
 */
contract FaucetMaticToken is Ownable {
  
  mapping(address => uint256) public lastFaucets;
  uint256 private amount;
  address public token;

  constructor () public
  {
    amount = 3;
  }

  function updateAmount(uint256 _amount) public onlyOwner {
    amount = _amount;
  }

  function updateToken(address _token) public onlyOwner {
    token = _token;
  }

  /**
  * faucet
  */
  function faucet(
    address _to
  )
  public
  {
    require(block.number - lastFaucets[_to] > 10);
    lastFaucets[_to] = block.number;
    IERC20(token).transfer(_to, amount);
  }
}