#include <stddef.h>
#include <stdint.h>

typedef struct BITCOIN_BLOCK_HEADER {
  uint8_t version[4];
  uint8_t prev_block[32];
  uint8_t merkle_root[32];
  uint8_t timestamp[4];
  uint8_t difficulty_target[4];
  uint8_t nonce[4];
} bitcoin_block_header_t;