blockchain.c

#include <stdio.h>
#include <search.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "block.h"
#include "linkedlist.h"

#define NVOTES 10

extern hash string_hash(void *string);

typedef enum party_code_t {GOOD_PARTY, MEDIOCRE_PARTY, EVIL_PARTY, MAX_PARTIES} party_code;
char *party_name[MAX_PARTIES] = {"GOOD PARTY", "MEDIOCRE_PARTY", "EVIL_PARTY"};

static party_code get_vote()
{
    int r = rand();
    return r%MAX_PARTIES;
}

void main(int argc, char const *argv[])
{  
    srand(time(NULL));

    NODE *head;
    DATA genesis_element;
    init(&head);

    // First block is created manually with hash = 0
    transaction genesis_transactions = {party_name[get_vote()]};
    block_t genesis_block = {0, string_hash(genesis_transactions), genesis_transactions};
    genesis_element.info = genesis_block;
    head = add(head, genesis_element);

    // Now, we are going to submmit n random votes
    int i, previous_hash = genesis_element.info.previous_block_hash;
    transaction trans_list = (transaction) malloc(NVOTES * sizeof(char)*10);
    for(i=0;i<NVOTES;i++)
    {
        DATA *el = malloc(sizeof(DATA));
        block_t *b = malloc(sizeof(block_t));

        transaction t = {party_name[get_vote()]};
        strcat(trans_list, t);
        b->previous_block_hash = previous_hash;
        b->block_hash = string_hash(trans_list);
        b->transactions = t;
        el->info = *b;
        previous_hash = b->block_hash;
        head = add(head, *el);

    }

    print_list(head);
    
    return;
}