Corda responder flow not answering - token

Question

I created a very easy flow test with IntelliJ.
#Test
public void dummyTest() throws InterruptedException, ExecutionException {
Party Alice = aliceNode.getServices().getIdentityService().wellKnownPartyFromX500Name(new CordaX500Name("Alice", "London", "GB"));
FlowInitiatorIssueToken flow = new FlowInitiatorIssueToken(30, alice, network.getDefaultNotaryIdentity());
SignedTransaction transaction = bobNode.startFlow(flow).get();
// The error occurs because of this line ....
State state = (State) transaction.getTx().getOutputStates().get(0);
assertEquals(state.getParticipants(), alice);
VaultQueryCriteria criteria = new VaultQueryCriteria(Vault.StateStatus.ALL);
aliceNode.transaction(() -> {
Vault.Page<State> result = aliceNode.getServices().getVaultService().queryBy(State.class, criteria);
assertTrue(result.getStates().size() > 0);
return null;
});
network.runNetwork();
}
IntelliJ is not able to fulfil the test and gives me the error
statemachine.FlowMonitor. - Flow with id 3982ab19-3e5b-4737-9adf-e4a6a97d20e6 has been waiting for 117 seconds to receive messages from parties [O=Alice, L=London, C=GB]
This led to the assumption that the responder flow is not doing anything.
// ******************
// * Initiator flow *
// ******************
#InitiatingFlow
#StartableByRPC
public class FlowInitiatorIssueToken extends FlowLogic<SignedTransaction> {
private final Integer value;
private final Party counterParty;
private final Party notary;
public FlowInitiatorIssuToken(Integer value, Party counterParty, Party notary) {
this.value = value;
this.counterParty = counterParty;
this.notary = notary;
}
/**
* The flow logic is encapsulated within the call() method.
*/
#Suspendable
#Override
public SignedTransaction call() throws FlowException {
/*------------------------------
* SENDING AND RECEIVING DATA *
------------------------------*/
FlowSession issueTokenSession = initiateFlow((Party) counterParty);
/*------------------------------------------
* GATHERING OTHER TRANSACTION COMPONENTS *
------------------------------------------*/
State outputState = new State(this.value, this.counterParty);
Command<ContractToken.Commands.Issue> command = new Command<>(new ContractToken.Commands.Issue(), getOurIdentity().getOwningKey());
/*------------------------
* TRANSACTION BUILDING *
------------------------*/
TransactionBuilder txBuilder = new TransactionBuilder(notary)
.addOutputState(outputState, ContractToken.ID)
.addCommand(command);
/*-----------------------
* TRANSACTION SIGNING *
-----------------------*/
SignedTransaction signedTx = getServiceHub().signInitialTransaction(txBuilder);
/*------------------------------
* FINALISING THE TRANSACTION *
------------------------------*/
System.out.println("Hey World!");
subFlow(new FinalityFlow(signedTx, issueTokenSession));
return null;
}
}
// ******************
// * Responder flow *
// ******************
#InitiatedBy(FlowInitiatorIssueToken.class)
public class FlowResponderIssueToken extends FlowLogic<SignedTransaction> {
private final FlowSession issueTokenSession;
public FlowResponderIssueToken(FlowSession issueTokenSession) {
this.issueTokenSession = issueTokenSession;
}
#Suspendable
#Override
public SignedTransaction call() throws FlowException {
/*-----------------------------------------
* RESPONDING TO COLLECT_SIGNATURES_FLOW *
-----------------------------------------*/
class SignTxFlow extends SignTransactionFlow {
private SignTxFlow(FlowSession issueTokenSession) {
super(issueTokenSession);
}
#Override
protected void checkTransaction(SignedTransaction stx) {
}
}
SecureHash idOfTxWeSigned = subFlow(new SignTxFlow(issueTokenSession, SignTransactionFlow.tracker())).getId();
/*------------------------------
* FINALISING THE TRANSACTION *
------------------------------*/
subFlow(new ReceiveFinalityFlow(issueTokenSession, idOfTxWeSigned));
return null;
}
}
The initiator flow is executed. I can see that, because the System.out.println("Hey World!") command is showing up in the logs. However, I don't know whether the responder flow is never started by the initiator flow or it is just not reacting. Maybe you can help me with that.
Thanks!

Answer 1

You didn't call CollectSignaturesFlow in your initiator; that's why you didn't initiate a "conversation" with the responder for them to sign the transaction. See example here.
SignTransactionFlow that you call in your responder is a "reply" to calling CollectSignaturesFlow in the initiator.
Btw, you must verify a transaction before you sign it in your initiator. See example here.

Answer 2

Another thing missing was the key of the counterParty. When initialising the command, I added
final Command<ContractToken.Commands.Issue> txCommand = new Command<>(
new ContractToken.Commands.Issue(),
ImmutableList.of(getOurIdentity().getOwningKey(), counterParty.getOwningKey()));