Client
A flow to be used by a party for obtaining signature(s) from a NotaryService ascertaining the transaction time-window is correct and none of its inputs have been used in another completed transaction.
In case of a single-node or Raft notary, the flow will return a single signature. For the BFT notary multiple signatures will be returned – one from each replica that accepted the input state commit.
The transaction to be notarised, stx, should be fully verified before calling this flow.
Throws
in case the any of the inputs to the transaction have been consumed by another transaction or the time-window is invalid or the parameters used for this transaction are no longer in force in the network.
Constructors
Properties
Specifies the identity to use for this flow. This will be one of the multiple identities that belong to this node. This is the same as calling ourIdentityAndCert.party.
Specifies the identity, with certificate, to use for this flow. This will be one of the multiple identities that belong to this node.
Override this to provide a ProgressTracker. If one is provided and stepped, the framework will do something helpful with the progress reports e.g record to the audit service. If this flow is invoked as a subflow of another, then the tracker will be made a child of the current step in the parent. If it's null, this flow doesn't track progress.
Returns a wrapped java.util.UUID object that identifies this state machine run (i.e. subflows have the same identifier as their parents).
Provides access to big, heavy classes that may be reconstructed from time to time, e.g. across restarts. It is only available once the flow has started, which means it cannot be accessed in the constructor. Either access this lazily or from inside call.
Functions
This is where you fill out your business logic.
Helper function that throws a KilledFlowException if the current FlowLogic has been killed.
Helper function that throws a KilledFlowException if the current FlowLogic has been killed. The provided message is added to the thrown KilledFlowException.
Flows can call this method to ensure that the active FlowInitiator is authorised for a particular action. This provides fine grained control over application level permissions, when RPC control over starting the flow is insufficient, or the permission is runtime dependent upon the choices made inside long lived flow code. For example some users may have restricted limits on how much cash they can transfer, or whether they can change certain fields. An audit event is always recorded whenever this method is used. If the permission is not granted for the FlowInitiator a FlowException is thrown.
Check that network parameters hash on this transaction is the current hash for the network.
Closes the provided sessions and performs cleanup of any resources tied to these sessions.
Returns a shallow copy of the Quasar stack frames at the time of call to flowStackSnapshot. Use this to inspect what objects would be serialised at the time of call to a suspending action (e.g. send/receive). Note: This logic is only available during tests and is not meant to be used during the production deployment. Therefore the default implementation does nothing.
Returns a FlowInfo object describing the flow otherParty is using. With FlowInfo.flowVersion it provides the necessary information needed for the evolution of flows and enabling backwards compatibility.
Creates a communication session with destination. Subsequently you may send/receive using this session object. How the messaging is routed depends on the Destination type, including whether this call does any initial communication.
Creates a communication session with party. Subsequently you may send/receive using this session object. Note that this function does not communicate in itself, the counter-flow will be kicked off by the first send/receive.
Persists a shallow copy of the Quasar stack frames at the time of call to persistFlowStackSnapshot. Use this to track the monitor evolution of the quasar stack values during the flow execution. The flow stack snapshot is stored in a file located in {baseDir}/flowStackSnapshots/YYYY-MM-DD/{flowId}/ where baseDir is the node running directory and flowId is the flow unique identifier generated by the platform.
Suspends until the specified otherParty sends us a message of type R.
Suspends until the specified otherParty sends us a message of type receiveType.
Suspends until a message has been received for each session in the specified sessions.
Suspends until a message has been received for each session in the specified sessions.
Suspends until a message has been received for each session in the specified sessions.
Queues the given payloads for sending to the provided sessions and continues without suspending.
Serializes and queues the given payload object for sending to the otherParty. Suspends until a response is received, which must be of the given R type.
Serializes and queues the given payload object for sending to the otherParty. Suspends until a response is received, which must be of the given receiveType. Remember that when receiving data from other parties the data should not be trusted until it's been thoroughly verified for consistency and that all expectations are satisfied, as a malicious peer may send you subtly corrupted data in order to exploit your code.
Returns a pair of the current steps tree of current progressTracker as pairs of zero-based depth and stringified step label and observable of upcoming changes to the structure.
Returns a pair of the current progress step index (as integer) in steps tree of current progressTracker, and an observable of its upcoming changes.
Suspends the flow until the transaction with the specified ID is received, successfully verified and sent to the vault for processing. Note that this call suspends until the transaction is considered valid by the local node, but that doesn't imply the vault will consider it relevant.
Suspends the current flow until all the provided StateRefs have been consumed.