token.sol

pragma solidity ^0.4.15;

contract Token {

    //uint256 public totalSupply;
    function totalSupply() constant returns (uint256 supply);

    function balanceOf(address _owner) constant returns (uint256 balance);
    
    //function transfer(address to, uint value, bytes data) returns (bool ok);
    
    //function transferFrom(address from, address to, uint value, bytes data) returns (bool ok);

    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 Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}