1  pragma solidity >=0.5.0 <0.7.0;
 2  
 3  import "../token/ERC20Token.sol";
 4  
 5  contract TokenClaimer {
 6      event ClaimedTokens(address indexed _token, address indexed _controller, uint256 _amount);
 7  
 8      function claimTokens(address _token) external;
 9      /**
10       * @notice This method can be used by the controller to extract mistakenly
11       *  sent tokens to this contract.
12       * @param _token The address of the token contract that you want to recover
13       *  set to 0 in case you want to extract ether.
14       */
15      function withdrawBalance(address _token, address payable _destination)
16          internal
17      {
18          uint256 balance;
19          if (_token == address(0)) {
20              balance = address(this).balance;
21              address(_destination).transfer(balance);
22          } else {
23              ERC20Token token = ERC20Token(_token);
24              balance = token.balanceOf(address(this));
25              token.transfer(_destination, balance);
26          }
27          emit ClaimedTokens(_token, _destination, balance);
28      }
29  }