blockchain.h

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#ifndef _BLOCKCHAIN_H
#define _BLOCKCHAIN_H
 
#include <openssl/sha.h>
#include "lib/types.h"
#include "lib/rsa.h"
#include "lib/dataio.h"
 
#define BLOCK_HASH_SIZE SHA256_DIGEST_LENGTH
 
 
typedef struct block {
    Key* author;
    CellProtected* votes;
    uint8* hash;
    uint8* previous_hash;
    int nonce;
}Block;
 
bool write_block(const char* filename, const Block* b);
Block* read_block(const char* filename);
 
char* block_head_to_str(const Block* b);
void block_nonce_to_str(char* headstr, const Block* b);
char* block_to_str(const Block* b);
 
uint8* hash_string(const char* s);
void print_sha256_hash(const uint8* hash);
bool compare_hash(const uint8* A, const uint8* B);
uint8* copy_hash(const uint8* hash);
 
bool str_to_hash(const char* str, uint8** ret);
char* hash_to_str(const uint8* hash);
 
void compute_proof_of_work(Block *B, int d);
 
bool verify_block(const Block* B, int d);
void free_block(Block* b);
void delete_block(Block* b);
 
Block* init_block_raw(Key* auth, CellProtected* votes, uint8* prev_hash);
Block* init_block(const Key* auth, const CellProtected* votes, const uint8* prev_hash);
 
typedef struct block_tree_cell {
    Block* block;
    struct block_tree_cell* father;
    struct block_tree_cell* firstChild;
    struct block_tree_cell* nextBro;
    size_t height;
} CellTree;
 
void print_tree(CellTree* tr);
 
CellTree* create_node(Block* b);
bool update_height(CellTree* father, CellTree* child);
void add_child(CellTree* father, CellTree* child);
void delete_node(CellTree* node);
void free_node(CellTree* node);
void delete_tree(CellTree* node);
void free_tree(CellTree* node);
 
CellTree* highest_child(const CellTree* cell);
CellTree* last_node(CellTree* tree);
 
CellProtected* get_trusted_declarations(const CellTree* tree);
 
void submit_vote(Protected* p);
void create_block(CellTree** tree, Key* author, int d);
void add_block(int d, const char* name);
 
CellTree* read_tree();
Key* compute_winner_BT(CellTree* tree, CellKey* candidates, CellKey* voters, size_t sizeC, size_t sizeV);
 
 
#endif