com.r3corda.protocols / RatesFixProtocol

RatesFixProtocol

open class RatesFixProtocol : ProtocolLogic<Unit>

This protocol queries the given oracle for an interest rate fix, and if it is within the given tolerance embeds the fix in the transaction and then proceeds to get the oracle to sign it. Although the call method combines the query and signing step, you can run the steps individually by constructing this object and then using the public methods for each step.

Exceptions

FixOutOfRange - if the returned fix was further away from the expected rate by the given amount.


Types

QUERYING class QUERYING : Step
QueryRequest data class QueryRequest : PartyRequestMessage
SIGNING object SIGNING : Step
SignRequest data class SignRequest : PartyRequestMessage
WORKING object WORKING : Step

Exceptions

FixOutOfRange class FixOutOfRange : Exception

Constructors

<init> RatesFixProtocol(tx: TransactionBuilder, oracle: Party, fixOf: FixOf, expectedRate: BigDecimal, rateTolerance: BigDecimal, progressTracker: ProgressTracker = RatesFixProtocol.tracker(fixOf.name))

This protocol queries the given oracle for an interest rate fix, and if it is within the given tolerance embeds the fix in the transaction and then proceeds to get the oracle to sign it. Although the call method combines the query and signing step, you can run the steps individually by constructing this object and then using the public methods for each step.

Properties

progressTracker open val progressTracker: ProgressTracker

Override this to provide a ProgressTracker. If one is provided and stepped, the framework will do something helpful with the progress reports. If this protocol is invoked as a sub-protocol of another, then the tracker will be made a child of the current step in the parent. If its null, this protocol doesnt track progress.

topic open val topic: String

The topic to use when communicating with other parties. If more than one topic is required then use sub-protocols. Note that this is temporary until protocol sessions are properly implemented.

tx val tx: TransactionBuilder

Inherited Properties

logger val logger: <ERROR CLASS>

This is where you should log things to.

psm lateinit var psm: ProtocolStateMachine<*>

Reference to the Fiber instance that is the top level controller for the entire flow.

serviceHub val serviceHub: ServiceHub

Provides access to big, heavy classes that may be reconstructed from time to time, e.g. across restarts. It is only available once the protocol has started, which means it cannnot be accessed in the constructor. Either access this lazily or from inside call.

Functions

beforeSigning open fun beforeSigning(fix: Fix): Unit

You can override this to perform any additional work needed after the fix is added to the transaction but before its sent back to the oracle for signing (for example, adding output states that depend on the fix).

call open fun call(): Unit

This is where you fill out your business logic.

Inherited Functions

receive fun <T : Any> receive(sessionIDForReceive: Long): UntrustworthyData<T>
fun <T : Any> receive(sessionIDForReceive: Long, receiveType: Class<T>): UntrustworthyData<T>
send fun send(destination: Party, sessionID: Long, payload: Any): Unit
sendAndReceive fun <T : Any> sendAndReceive(destination: Party, sessionIDForSend: Long, sessionIDForReceive: Long, payload: Any): UntrustworthyData<T>
subProtocol fun <R> subProtocol(subLogic: ProtocolLogic<R>): R

Invokes the given subprotocol by simply passing through this ProtocolLogics reference to the ProtocolStateMachine and then calling the call method.

Companion Object Properties

TOPIC val TOPIC: String

Companion Object Functions

tracker fun tracker(fixName: String): ProgressTracker