I am not seeing an archived contract in the TransactionTree

G-d willing

Hello guys,
I have the following code:

template A
  with
    owner : Party
    id : Int
    value : Int
    something : Text
  where
    signatory owner

    choice DoSomething: ContractId A
      controller owner
      do
        create this with value = 10

The DoSomething choice basically archives the previous version of its own.
However, when looking at the TransactionTree I cannot see the archived version.
I am trying to check that using the following script:

testDoSomething : Script ()
testDoSomething = script do
  alice <- allocateParty "alice"
  a <- submit alice do
            createCmd A with owner = alice, id = 1, value = 1, something = "Some Text"
 
  TransactionTree{rootEvents = [ExercisedEvent Exercised{contractId, choice,
      childEvents = [CreatedEvent created]
    }]} <-
    submitTree alice do
      exerciseCmd a DoSomething
 
  debug $ fromAnyTemplate @A created.argument
 
  pure ()

I expected to get more from in the transaction tree. For example, when I tried to do:

TransactionTree{rootEvents = [ExercisedEvent Exercised{contractId, choice,
      childEvents = [CreatedEvent created, ExercisedEvent archived]
    }]} <-
    submitTree alice do
      exerciseCmd a DoSomething

But this code fails since there is no ExercisedEvent in the return value.
So, how can I get the archived contract that happened during the exercise of DoSomething?

Thanks,

Disclaimer: I do not answer your question.

You are correct that the Transaction Tree does not include explicit mention of the archiving of the contract.

That is consistent with what we see in the Daml Studio Transaction View.

image1117×205 40.7 KB

That is also consistent with the fact that Archive is an auto-generated choice on the contract. And, to be honest, you are not exercising that choice, like this example:

image1003×250 48.3 KB

There have been related discussions on these two posts:

• Explicit archives on the TransactionTree stream.
• Why isn't there an archive node in the transaction graph on a (consuming) choice - #2 by cocreature

So, how can I get the archived contract that happened during the exercise of DoSomething ?

The consuming exercise is the root node.

Thanks @bernhard for your comment.
Can you tell me how I can detect all of the true archived contracts that happened during an exercise of a choice?
After examining the TransactionTree I can do that by matching a CreateEvent with an ExercisedEvent that has the same contracted.
Why when the call to the archive function does not add ExerciseEvent with a choice named Archive? If that could happen, it would be very useful.