base_tx.h

#pragma once
#include <stdlib.h>
#include "constants.h"
#include "mbedtls/ecdsa.h"
 
typedef struct Output{
  unsigned long amt;
  unsigned char public_key_hash[PUB_KEY_HASH_LEN];
} Output;
 
typedef struct Input{
  mbedtls_ecp_point *pub_key;
  size_t sig_len;
  unsigned char signature[SIGNATURE_LEN];
  unsigned char prev_tx_id[TX_HASH_LEN];
  unsigned int prev_utxo_output;
} Input; 
 
typedef struct Transaction{
  unsigned int num_inputs;
  unsigned int num_outputs;
  Input *inputs;
  Output *outputs;
} Transaction;
 
typedef struct UTXO{
  unsigned long amt;
  unsigned char public_key_hash[PUB_KEY_HASH_LEN];
} UTXO;
 
/* Hashes passed transaction
 *
 * dest: Buffer to write hash to, expected to be of size TX_HASH_LEN
 * tx: Transaction to hash
 */
void hash_tx(unsigned char *dest, Transaction *tx);
 
void free_tx(Transaction *tx);
 
Transaction *copy_tx(Transaction *tx);
 
void print_input(Input *input, char *prefix);
void print_output(Output *output, char *prefix);
void print_tx(Transaction *tx, char *prefix);
 
void pretty_print_tx(Transaction *tx, char *prefix);