exchange by charge – Dropping changed transactions when watching the mempool

I’m attempting to seize all of the changed transactions. I’ve complied Bitcon Core with tracing enabled and take heed to the mempool:changed as advised on this query.

This methodology works as anticipated and I can get the changed transactions. Nevertheless, in some instances (about 20% of all of the transactions I seize) the tracepoint alerts me of the transaction being changed, however then I’m not capturing the alternative of that transaction.

I can consider two the reason why that is taking place:

1. It might be that among the replacements don’t enter my mempool. But when that’s the case, how does the tracepoint is aware of that the transactions is being changed? Additionally, it’s bizarre that this is able to occur with so many transactions (20% as defined earlier).
2. The second choice is that the script that course of the transaction is just not contemplating some instances, which results in shedding transactions. The script is a modified model of this instance. I’ve modified it so I can seize the kids of the changed transactions as effectively. The information I collect with this script is later saved in a pkl file, which is why it has a shared listing.

I do not know why I’m shedding so many transactions, and I used to be questioning if somebody may assist see what I’m doing incorrect.

Listed below are the modified capabilities:

       def handle_replaced(_, information, measurement):
          # Set up a brand new RPC connection for this occasion
          rpc_connection_replaced = connection()
          occasion = bpf["replaced_events"].occasion(information)
          hash_replaced = bytes(occasion.replaced_hash)[::-1].hex()
          hash_new = bytes(occasion.replacement_hash)[::-1].hex()
          tx_time = get_timestamp()
          
          hex_tx = rpc_connection_replaced.getrawtransaction(hash_new)
          new_tx = rpc_connection_replaced.decoderawtransaction(hex_tx)
          new_tx['hex'] = hex_tx
          # Decide guardian transactions which might be nonetheless within the mempool and usually are not the transaction itself
          mother and father = set([x['txid'] for x in new_tx['vin'] if x['txid'] in mempool.keys() and x['txid'] != new_tx['txid']])
          # Retrieve the outdated transaction information from the mempool 
          outdated = mempool.get(hash_replaced, None)
          if outdated is just not None:  # Some transactions could also be lacking initially
            mempool.pop(hash_replaced, None)
            # Share the changed occasion particulars through list_shared queue
            list_shared.put((outdated, [new_tx, tx_time, parents]))
            # Discover all youngster transactions that reference the brand new transaction as a guardian
            childs = [i[0]['txid'] for i in mempool.values() if new_tx['txid'] in i[2]]
            
            # Recursive operate to gather youngster transaction IDs
            def youngster(ll):
              if len(ll) == 0:
                return []
              new_childs = [i[0]['txid'] for i in mempool.values() if ll - i[2] != ll]
              return listing(ll) + new_childs + youngster(set(new_childs))
            
            if len(childs) > 0:
              childs = youngster(set(childs))
              # Share the connection between the brand new transaction and the primary youngster
              list_shared.put(([new_tx, tx_time, parents], mempool[childs[0]]))
              # Share connections between subsequent youngster transactions
              for i in vary(len(childs)-1):
                list_shared.put((mempool[childs[i]], mempool[childs[i+1]]))

          # Add the brand new transaction to the mempool with its timestamp and guardian set
          mempool[new_tx['txid']] = [new_tx, tx_time, parents]
          logger.information('-----------')
          logger.information('New RBF!')        
          
      def handle_added(_, information, measurement):
          rpc_connection_added = connection()
          occasion = bpf["added_events"].occasion(information)
          hash_new = bytes(occasion.hash)[::-1].hex()
          hex_tx = rpc_connection_added.getrawtransaction(hash_new)
          tx_raw = rpc_connection_added.decoderawtransaction(hex_tx)
          tx_raw['hex'] = hex_tx
          mother and father = set([x['txid'] for x in tx_raw['vin'] if x['txid'] in mempool.keys()])
          mempool[tx_raw['txid']] = [tx_raw, get_timestamp(), parents]
          
      def handle_removed(_, information, measurement):
        occasion = bpf["removed_events"].occasion(information)
        if occasion.cause != b'changed':
            txid_rem = bytes(occasion.hash)[::-1].hex()
                    
            keys = mempool.keys()
            if txid_rem in keys:
              mempool.pop(txid_rem) 
              logger.information('-----------')
              logger.information(f'Eliminated. Cause:{occasion.cause}')