public Optional<TransactionProcessingResult> applyParallelizedTransactionResult(
      final MutableWorldState worldState,
      final Address miningBeneficiary,
      final Transaction transaction,
      final int transactionLocation,
      final Optional<Counter> confirmedParallelizedTransactionCounter,
      final Optional<Counter> conflictingButCachedTransactionCounter) {
    final PathBasedWorldState pathBasedWorldState = (PathBasedWorldState) worldState;
    final PathBasedWorldStateUpdateAccumulator blockAccumulator =
        (PathBasedWorldStateUpdateAccumulator) pathBasedWorldState.updater();
    final ParallelizedTransactionContext parallelizedTransactionContext =
        parallelizedTransactionContextByLocation.remove(transactionLocation);
    /*
     * If `parallelizedTransactionContext` is not null, it means that the transaction had time to complete in the background.
     */
    if (parallelizedTransactionContext != null) {
      final PathBasedWorldStateUpdateAccumulator<?> transactionAccumulator =
          parallelizedTransactionContext.transactionAccumulator();
      final TransactionProcessingResult transactionProcessingResult =
          parallelizedTransactionContext.transactionProcessingResult();
      final boolean hasCollision =
          transactionCollisionDetector.hasCollision(
              transaction, miningBeneficiary, parallelizedTransactionContext, blockAccumulator);
      if (transactionProcessingResult.isSuccessful() && !hasCollision) {
        Wei reward = parallelizedTransactionContext.miningBeneficiaryReward();
        if (!reward.isZero() || !transactionProcessor.getClearEmptyAccounts()) {
          blockAccumulator.getOrCreate(miningBeneficiary).incrementBalance(reward);
        }

        blockAccumulator.importStateChangesFromSource(transactionAccumulator);

        if (confirmedParallelizedTransactionCounter.isPresent()) {
          confirmedParallelizedTransactionCounter.get().inc();
          transactionProcessingResult.setIsProcessedInParallel(Optional.of(Boolean.TRUE));
          transactionProcessingResult.accumulator = transactionAccumulator;
        }
        return Optional.of(transactionProcessingResult);
      } else {
        blockAccumulator.importPriorStateFromSource(transactionAccumulator);
        if (conflictingButCachedTransactionCounter.isPresent())
          conflictingButCachedTransactionCounter.get().inc();
        // If there is a conflict, we return an empty result to signal the block processor to
        // re-execute the transaction.
        return Optional.empty();
      }
    } else {
      // stop background processing for this transaction as useless
      final CompletableFuture<Void> completableFuturesForBackgroundTransaction =
          completableFuturesForBackgroundTransactions[transactionLocation];
      if (completableFuturesForBackgroundTransaction != null) {
        completableFuturesForBackgroundTransaction.cancel(true);
      }
    }
    return Optional.empty();
  }
Applies the results of parallelized transactions to the world state after checking for
conflicts.

<p>If a transaction was executed optimistically without any detected conflicts, its result is
directly applied to the world state. If there is a conflict, this method does not apply the
transaction's modifications directly to the world state. Instead, it caches the data read from
the database during the transaction's execution. This cached data is then used to optimize the
replay of the transaction by reducing the need for additional reads from the disk, thereby
making the replay process faster. This approach ensures that the integrity of the world state
is maintained while optimizing the performance of transaction processing.

@param worldState Mutable world state intended for applying transaction results.
@param miningBeneficiary Address of the beneficiary for mining rewards.
@param transaction Transaction for which the result is to be applied.
@param transactionLocation Index of the transaction within the block.
@param confirmedParallelizedTransactionCounter Metric counter for confirmed parallelized
    transactions
@param conflictingButCachedTransactionCounter Metric counter for conflicting but cached
    transactions
@return Optional containing the transaction processing result if applied, or empty if the
    transaction needs to be replayed due to a conflict.
ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/parallelization/ParallelizedConcurrentTransactionProcessor.java