pragma solidity ^ 0.5.0;
    import "zos-lib/contracts/Initializable.sol";

    contract Wallet is Initializable {

    address owner;

       function initialize(address _owner) initializer public {
          owner = _owner;
       }

       function transfer(address payable receiver) public {
         require(owner == msg.sender);
         receiver.transfer(address(this).balance);
       }
    }