/**
 *Submitted for verification at Etherscan.io on 2020-06-29
*/

pragma solidity 0.5.11;

contract ERC20Interface {
  function transfer(address _to, uint256 _value) public returns (bool success);
  function balanceOf(address _owner) public view returns (uint256 balance);
}

interface BadERC20 {
  function transfer(address to, uint value) external;
}


contract etherForwarder {

  address payable public ownerAddress;
  address payable public trezorAddress;
  
  
  constructor(address payable _trezorAddress) public {
    ownerAddress = msg.sender;
    trezorAddress = _trezorAddress;
  }

  modifier onlyOwner {

    if (msg.sender != ownerAddress) {
      revert();
    }

    _;

  }
  
  modifier onlyTrezorOwner {

    if (msg.sender != trezorAddress) {
      revert();
    }

    _;

  }


  function() external payable {

    if(!trezorAddress.send(msg.value)){
      revert();
    }
  }
  
  function changeOwner(address payable newOwnerAddress) external onlyTrezorOwner {
      trezorAddress = newOwnerAddress;
  }

  function transferTokens(address tokenContractAddress) external onlyOwner {

    ERC20Interface instance = ERC20Interface(tokenContractAddress);
    address forwarderAddress = address(this);
    uint256 forwarderBalance = instance.balanceOf(forwarderAddress);

    if (forwarderBalance == 0) {
      return;
    }
    
    if(!safeTransfer(tokenContractAddress,forwarderBalance)){
        revert();
    }

    //if (!instance.transfer(trezorAddress, forwarderBalance)) {
    //  revert();
    //}

  }

  function withdrawEther() public {

    uint256 balance = address(this).balance;

    if(!trezorAddress.send(balance)){
        revert();
    }

  }
  
  function safeTransfer(address token,  uint value) public returns (bool result) {
        
        BadERC20(token).transfer(trezorAddress,value);

        assembly {
            switch returndatasize()   
                case 0 {                      // This is our BadToken
                    result := not(0)          // result is true
                }
                case 32 {                     // This is our GoodToken
                    returndatacopy(0, 0, 32) 
                    result := mload(0)        // result == returndata of external call
                }
                default {                     // This is not an ERC20 token
                    revert(0, 0) 
                }
        }
    require(result);                          // revert() if result is false
    }

}

• No Contract Security Audit Submitted- Submit Audit Here

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