class ContractStateMachine[Nid] extends AnyRef
Implements a state machine for contracts and their keys while interpreting a Daml-LF command or iterating over a com.daml.lf.transaction.HasTxNodes in execution order. The contract state machine keeps track of the updates to the ContractStateMachine.ActiveLedgerState since the beginning of the interpretation or iteration. The interpretation or iteration must call the corresponding handle method for every node on the ContractStateMachine.State.
- Nid
Type parameter for com.daml.lf.transaction.NodeIds during interpretation. Use scala.Unit for iteration.
- See also
com.daml.lf.transaction.HasTxNodes.contractKeyInputs for an iteration in mode com.daml.lf.transaction.ContractKeyUniquenessMode.Strict and
ContractStateMachineSpec.visitSubtree for iteration in all modes
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- new ContractStateMachine(mode: ContractKeyUniquenessMode)
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- case class State extends Product with Serializable
Invariants: - globalKeyInputs's keyset is a superset of activeState.ActiveLedgerState.keys's keyset and of all the ActiveLedgerState.keys's keysets in rollbackStack.
Invariants: - globalKeyInputs's keyset is a superset of activeState.ActiveLedgerState.keys's keyset and of all the ActiveLedgerState.keys's keysets in rollbackStack. (the superset can be strict in case of by-key nodes inside an already completed Rollback scope) - In mode !ContractKeyUniquenessMode.Off, the keys belonging to the contracts in activeState.ActiveLedgerState.consumedBy's keyset are in activeState.ActiveLedgerState.keys, and similarly for all ActiveLedgerStates in rollbackStack.
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