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Flow to issue cash and pay using the returned tx id rather than a vault
query to find the new state
This commit is contained in:
Christian Sailer
parent
792089e179
commit
0b7678b8ec
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package com.r3.corda.enterprise.perftestcordapp.flows
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import co.paralleluniverse.fibers.Suspendable
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import com.r3.corda.enterprise.perftestcordapp.contracts.asset.Cash
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import com.r3.corda.enterprise.perftestcordapp.contracts.asset.OnLedgerAsset
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import com.r3.corda.enterprise.perftestcordapp.contracts.asset.PartyAndAmount
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import net.corda.core.contracts.*
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import net.corda.core.flows.StartableByRPC
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import net.corda.core.identity.AbstractParty
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import net.corda.core.identity.Party
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import net.corda.core.transactions.TransactionBuilder
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import net.corda.core.utilities.OpaqueBytes
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import net.corda.core.utilities.ProgressTracker
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import java.util.*
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/**
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* Initiates a flow that self-issues cash (which should then be sent to recipient(s) using a payment transaction).
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*
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* We issue cash only to ourselves so that all KYC/AML checks on payments are enforced consistently, rather than risk
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* checks for issuance and payments differing. Outside of test scenarios it would be extremely unusual to issue cash
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* and immediately transfer it, so impact of this limitation is considered minimal.
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*
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* @param amount the amount of currency to issue.
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* @param issueRef a reference to put on the issued currency.
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* @param recipient payee Party
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* @param anonymous whether to anonymise before the transaction
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* @param notary the notary to set on the output states.
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*/
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@StartableByRPC
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class CashIssueAndPaymentNoSelection(val amount: Amount<Currency>,
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val issueRef: OpaqueBytes,
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val recipient: Party,
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val anonymous: Boolean,
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val notary: Party,
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progressTracker: ProgressTracker) : AbstractCashFlow<AbstractCashFlow.Result>(progressTracker) {
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constructor(request: CashIssueAndPaymentFlow.IssueAndPaymentRequest) : this(request.amount, request.issueRef, request.recipient, request.anonymous, request.notary, tracker())
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@Suspendable
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override fun call(): Result {
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fun deriveState(txState: TransactionState<Cash.State>, amt: Amount<Issued<Currency>>, owner: AbstractParty)
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= txState.copy(data = txState.data.copy(amount = amt, owner = owner))
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val issueResult = subFlow(CashIssueFlow(amount, issueRef, notary))
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val cashStateAndRef = issueResult.stx.tx.outRef<Cash.State>(0)
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val changeIdentity = serviceHub.keyManagementService.freshKeyAndCert(ourIdentityAndCert, false)
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val builder = TransactionBuilder(notary)
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val (spendTx, keysForSigning) = OnLedgerAsset.generateSpend(builder, listOf(PartyAndAmount(recipient, amount)), listOf(cashStateAndRef),
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changeIdentity.party.anonymise(),
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{ state, quantity, owner -> deriveState(state, quantity, owner) },
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{ Cash().generateMoveCommand() })
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progressTracker.currentStep = SIGNING_TX
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val tx = serviceHub.signInitialTransaction(spendTx, keysForSigning)
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progressTracker.currentStep = FINALISING_TX
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val notarised = finaliseTx(tx, setOf(recipient), "Unable to notarise spend")
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return Result(notarised, recipient)
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}
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constructor(amount: Amount<Currency>, issueRef: OpaqueBytes, payTo: Party, anonymous: Boolean, notary: Party) : this(amount, issueRef, payTo, anonymous, notary, tracker())
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}
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@ -0,0 +1,87 @@
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package com.r3.corda.enterprise.perftestcordapp.flows
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import com.r3.corda.enterprise.perftestcordapp.DOLLARS
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import com.r3.corda.enterprise.perftestcordapp.`issued by`
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import com.r3.corda.enterprise.perftestcordapp.contracts.asset.Cash
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import net.corda.core.identity.Party
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import net.corda.core.node.services.Vault
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import net.corda.core.node.services.trackBy
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import net.corda.core.node.services.vault.QueryCriteria
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import net.corda.core.utilities.OpaqueBytes
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import net.corda.core.utilities.getOrThrow
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import net.corda.node.internal.StartedNode
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import net.corda.testing.*
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import net.corda.testing.node.InMemoryMessagingNetwork.ServicePeerAllocationStrategy.RoundRobin
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import net.corda.testing.node.MockNetwork
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import net.corda.testing.node.MockNetwork.MockNode
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import org.junit.After
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import org.junit.Before
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import org.junit.Test
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import kotlin.test.assertEquals
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class CashIssueAndPayNoSelectionTests {
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private lateinit var mockNet: MockNetwork
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private val initialBalance = 2000.DOLLARS
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private val ref = OpaqueBytes.of(0x01)
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private lateinit var bankOfCordaNode: StartedNode<MockNode>
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private lateinit var bankOfCorda: Party
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private lateinit var aliceNode: StartedNode<MockNode>
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private lateinit var notary: Party
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@Before
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fun start() {
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mockNet = MockNetwork(servicePeerAllocationStrategy = RoundRobin(), cordappPackages = listOf("com.r3.corda.enterprise.perftestcordapp.contracts.asset"))
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bankOfCordaNode = mockNet.createPartyNode(BOC.name)
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aliceNode = mockNet.createPartyNode(ALICE.name)
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bankOfCorda = bankOfCordaNode.info.chooseIdentity()
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mockNet.runNetwork()
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notary = mockNet.defaultNotaryIdentity
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}
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@After
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fun cleanUp() {
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mockNet.stopNodes()
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}
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@Test
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fun `issue and pay some cash`() {
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val payTo = aliceNode.info.chooseIdentity()
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val expectedPayment = 500.DOLLARS
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bankOfCordaNode.database.transaction {
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// Register for vault updates
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val criteria = QueryCriteria.VaultQueryCriteria(status = Vault.StateStatus.ALL)
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val (_, vaultUpdatesBoc) = bankOfCordaNode.services.vaultService.trackBy<Cash.State>(criteria)
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val (_, vaultUpdatesBankClient) = aliceNode.services.vaultService.trackBy<Cash.State>(criteria)
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val future = bankOfCordaNode.services.startFlow(CashIssueAndPaymentNoSelection(expectedPayment, OpaqueBytes.of(1), payTo, false, notary)).resultFuture
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mockNet.runNetwork()
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future.getOrThrow()
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// Check bank of corda vault - should see two consecutive updates of issuing $500
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// and paying $500 to alice
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vaultUpdatesBoc.expectEvents {
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sequence(
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expect { update ->
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require(update.produced.size == 1) { "Expected 1 produced states, actual: $update" }
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val changeState = update.produced.single().state.data
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assertEquals(expectedPayment.`issued by`(bankOfCorda.ref(ref)), changeState.amount)
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},
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expect { update ->
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require(update.consumed.size == 1) { "Expected 1 consumed states, actual: $update" }
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}
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)
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}
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// Check notary node vault updates
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vaultUpdatesBankClient.expectEvents {
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expect { (consumed, produced) ->
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require(consumed.isEmpty()) { consumed.size }
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require(produced.size == 1) { produced.size }
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val paymentState = produced.single().state.data
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assertEquals(expectedPayment.`issued by`(bankOfCorda.ref(ref)), paymentState.amount)
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}
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}
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}
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}
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}
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