mempool.h

#pragma once
 
#include <stdio.h>
#include "constants.h"
#include "uthash.h"
#include "base_tx.h"
 
typedef struct MemPool {
  unsigned char id[TX_HASH_LEN];
  Transaction *tx;
  UT_hash_handle hh;
} MemPool;
 
MemPool *mempool;
 
/* Initializes the global mempool variable */
void mempool_init();
 
/* Creates a new entry in the hashmap with the passed transaction
 *
 * Returns passed transaction pointer if entry created, NULL otherwise
 *
 * transaction: Transaction pointer that will be stored in entry
 */
Transaction *mempool_add(Transaction *tx);
 
/* Removes the entry corresponding to tx_hash
 *
 * Returns the transaction pointer stored in removed entry if succesfully
 * removed, NULL otherwise
 *
 * tx_hash: Buffer of length TX_HASH_LEN, hash of transaction
 */
Transaction *mempool_remove(unsigned char *tx_hash);
 
/* Finds transaction corresponding to tx_hash
 *
 * Returns transaction pointer if found, NULL otherwise
 *
 * tx_hash: Buffer of length TX_HASH_LEN, hash of transaction
 */
Transaction *mempool_find(unsigned char *tx_hash);
 
/* Finds entry corresponding to tx_hash
 *
 * Returns entry if found, NULL otherwise
 *
 * tx_hash: Buffer of length TX_HASH_LEN, hash of transaction
 */
MemPool *mempool_find_node(unsigned char *tx_hash);
 
/*
Prints a mempool item with the associated id/hash from the hasmap
 
prefix: string to put in front of all print commands used for tabbing structure
*/
void print_mempool(MemPool *mempool, char *prefix);
 
/*
Prints all transactions in mempool hashmap to stdout
 
prefix: string to put in front of all print commands used for tabbing structure
*/
void print_mempool_hashmap(char *prefix);