Adel Rustum
2020-12-21 23:09:46
- Anytime a state is added as an input to a transaction, it is considered consumed.
- Let's say
Orderhas 3 attributes:Order(linearId, status, reason). - To mimic updates in Corda, your transaction will take as an input the state to be updated; and produce a new state that has the same
linearIdbut with different values for the remaining attributes. This way all states in your vault that have the samelinearIdare considered different versions of the same state, there will be only oneUNCONSUMEDversion; which is the latest version. Order(123, ALIVE, null)---Update Tx--->Order(123, CANCELED, "No longer needed").- You might also consider not creating an output if the state is "canceled"; you just consume it and not create an output; meaning it no longer exists on the ledger and Corda doesn't track it:
Order(123, ALIVE, null)---Cancel Tx---> no output.
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Thank you! I knew both these solutions before asking the question. I wanted to be sure that there's essentially nothing more idiomatic.