contract ERC20Interface is owned, SafeMath { // security reviewed 05/09/17
    function totalSupply() constant returns (uint256 tokenTotalSupply);
    function balanceOf(address _owner) constant returns (uint256 balance);
    function transfer(address _to, uint256 _value) returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
    function approve(address _spender, uint256 _value) returns (bool success);
    function allowance(address _owner, address _spender) constant returns (uint256 remaining);
    event Buy(address indexed _sender, uint256 _eth, uint256 _ARX);
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Burn(address _from, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    event Refund(address indexed _refunder, uint256 _value);
}
function totalSupply() constant returns (uint256 tokenTotalSupply);

// security reviewed 05/09/17