interface INestMining {
    function getNTokenAddress(address tokenAddress) external view returns (address);

    /// @dev Get the length of registered account array
    /// @return The length of registered account array
    function getAccountCount() external view returns (uint);
}
// 3.6nest挖矿合约
function getAccountCount() external view returns (uint);

/// @dev Get the length of registered account array
/// @return The length of registered account array