finalizeTransaction.java

progressTracker.setCurrentStep(FINALISATION);

// We notarise the transaction and get it recorded in the vault of
// the participants of all the transaction's states.
SignedTransaction notarisedTx1 = subFlow(new FinalityFlow(fullySignedTx, singleton(counterpartySession), FINALISATION.childProgressTracker()));

// We can also choose to send it to additional parties who aren't one
// of the state's participants.
List<FlowSession> partySessions = Arrays.asList(counterpartySession, initiateFlow(regulator));
SignedTransaction notarisedTx2 = subFlow(new FinalityFlow(fullySignedTx, partySessions, FINALISATION.childProgressTracker()));