interface INestLedger {
    function totalETHRewards(address ntokenAddress) external view returns (uint);

    /// @dev Check DAO application flag
    /// @param addr DAO application contract address
    /// @return Authorization flag, 1 means authorization, 0 means cancel authorization
    function checkApplication(address addr) external view returns (uint);
}
// 3.6DAO账本
function checkApplication(address addr) external view returns (uint);

/// @dev Check DAO application flag
/// @param addr DAO application contract address
/// @return Authorization flag, 1 means authorization, 0 means cancel authorization