Struct definition

SDK Code

typedef struct _file_data_node
{
	/* these are exactly the same as file_mht_node_t above, any change should apply to both (both are saved in the cache as void*) */
	uint8_t type;
	uint64_t data_node_number;
	file_mht_node_t* parent;
	bool need_writing;
	bool new_node;
	union {
		struct {
			uint64_t physical_node_number;
			encrypted_node_t encrypted; // the actual data from the disk
		};
		recovery_node_t recovery_node;
	};
	/* from here the structures are different */
	data_node_t plain; // decrypted data
} file_data_node_t;

This struct is nearly the same as file_mht_node_t, it seems like these are duplicated but working code.