contract ERC20Interface {

    //ERC20指定接口
    event Approval(address indexed src, address indexed guy, uint wad);
    event Transfer(address indexed src, address indexed dst, uint wad);

    //extend event
    event Grant(address indexed src, address indexed dst, uint wad);    //发放代币，有解禁期
    event Unlock(address indexed user, uint wad);                       //解禁代币

    function name() public view returns (string n);
    function symbol() public view returns (string s);
    function decimals() public view returns (uint8 d);
    function totalSupply() public view returns (uint256 t);
    function balanceOf(address _owner) public view returns (uint256 balance);
    function transfer(address _to, uint256 _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
    function approve(address _spender, uint256 _value) public returns (bool success);
    function allowance(address _owner, address _spender) public view returns (uint256 remaining);
}
function name() public view returns (string n);
//解禁代币