public static extern IntPtr ethash_full_new(string dagDir, IntPtr light, ethash_callback_t callback);
public static extern IntPtr ethash_full_new(IntPtr light, ethash_callback_t callback);
public static extern IntPtr ethash_full_new(string dagDir, IntPtr light, ethash_callback_t callback);
public static extern IntPtr ethash_full_new(IntPtr light, ethash_callback_t callback);