contract IST20 is StandardToken, DetailedERC20 {

    // off-chain hash
    string public tokenDetails;

    //transfer, transferFrom must respect use respect the result of verifyTransfer
    function verifyTransfer(address _from, address _to, uint256 _amount) public returns (bool success);

    /**
     * @notice mints new tokens and assigns them to the target _investor.
     * Can only be called by the STO attached to the token (Or by the ST owner if there's no STO attached yet)
     */
    function mint(address _investor, uint256 _amount) public returns (bool success);

    /**
     * @notice Burn function used to burn the securityToken
     * @param _value No. of token that get burned
     */
    function burn(uint256 _value) public;

    event Minted(address indexed to, uint256 amount);
    event Burnt(address indexed _burner, uint256 _value);

}
/**
 * @title Interface for the ST20 token standard
 */
function burn(uint256 _value) public;

/**
 * @notice Burn function used to burn the securityToken
 * @param _value No. of token that get burned
 */