CORDA-4123 Change MockNetworkParameterStorage to not rehash NetworkParameters (#6872)

* CORDA-4123 Change Mock Network Parameter Storage to not rehash the Network Parameters

* Fix Detekt

node/src/integration-test/kotlin/net/corda/node/CustomSerializationSchemeDriverTest.kt

@@ -29,6 +29,7 @@ import net.corda.core.identity.Party
 import net.corda.core.internal.concurrent.transpose
 import net.corda.core.internal.copyBytes
 import net.corda.core.messaging.startFlow
+import net.corda.core.node.ServiceHub
 import net.corda.core.serialization.CustomSerializationScheme
 import net.corda.core.serialization.SerializationSchemeContext
 import net.corda.core.serialization.internal.CustomSerializationSchemeUtils.Companion.getSchemeIdIfCustomSerializationMagic
@@ -55,12 +56,28 @@ import org.objenesis.strategy.InstantiatorStrategy
 import org.objenesis.strategy.StdInstantiatorStrategy
 import java.io.ByteArrayOutputStream
 import java.lang.reflect.Modifier
+import java.security.PublicKey
 import java.util.*
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue
 
 class CustomSerializationSchemeDriverTest {
 
+    companion object {
+        private fun createWireTx(serviceHub: ServiceHub, notary: Party, key: PublicKey, schemeId: Int): WireTransaction {
+            val outputState = TransactionState(
+                    data = DummyContract.DummyState(),
+                    contract = DummyContract::class.java.name,
+                    notary = notary,
+                    constraint = AlwaysAcceptAttachmentConstraint
+            )
+            val builder = TransactionBuilder()
+                    .addOutputState(outputState)
+                    .addCommand(DummyCommandData, key)
+            return builder.toWireTransaction(serviceHub, schemeId)
+        }
+    }
+
     @Test(timeout = 300_000)
     fun `flow can send wire transaction serialized with custom kryo serializer`() {
         driver(DriverParameters(notarySpecs = emptyList(), startNodesInProcess = true, cordappsForAllNodes = listOf(enclosedCordapp()))) {
@@ -120,16 +137,7 @@ class CustomSerializationSchemeDriverTest {
     class WriteTxToLedgerFlow(val counterparty: Party, val notary: Party) : FlowLogic<SecureHash>() {
         @Suspendable
         override fun call(): SecureHash {
-            val outputState = TransactionState(
-                data = DummyContract.DummyState(),
-                contract = DummyContract::class.java.name,
-                notary = notary,
-                constraint = AlwaysAcceptAttachmentConstraint
-            )
-            val builder = TransactionBuilder()
-                .addOutputState(outputState)
-                .addCommand(DummyCommandData, counterparty.owningKey)
-            val wireTx = builder.toWireTransaction(serviceHub, KryoScheme.SCHEME_ID)
+            val wireTx = createWireTx(serviceHub, notary, counterparty.owningKey, KryoScheme.SCHEME_ID)
             val partSignedTx = signWireTx(wireTx)
             val session = initiateFlow(counterparty)
             val fullySignedTx = subFlow(CollectSignaturesFlow(partSignedTx, setOf(session)))
@@ -174,17 +182,7 @@ class CustomSerializationSchemeDriverTest {
     class CheckComponentGroupsFlow(val notary: Party) : FlowLogic<Boolean>() {
         @Suspendable
         override fun call(): Boolean {
-            val outputState = TransactionState(
-                data = DummyContract.DummyState(),
-                contract = DummyContract::class.java.name,
-                notary = notary,
-                constraint = AlwaysAcceptAttachmentConstraint
-            )
-            val builder = TransactionBuilder()
-                .addOutputState(outputState)
-                .addCommand(DummyCommandData, notary.owningKey)
-
-            val wtx = builder.toWireTransaction(serviceHub, KryoScheme.SCHEME_ID)
+            val wtx = createWireTx(serviceHub, notary, notary.owningKey, KryoScheme.SCHEME_ID)
             var success = true
             for (group in wtx.componentGroups) {
                 //Component groups are lazily serialized as we iterate through.
@@ -230,23 +228,21 @@ class CustomSerializationSchemeDriverTest {
     class SendFlow(val counterparty: Party) : FlowLogic<Boolean>() {
         @Suspendable
         override fun call(): Boolean {
-            val outputState = TransactionState(
-                    data = DummyContract.DummyState(),
-                    contract = DummyContract::class.java.name,
-                    notary = counterparty,
-                    constraint = AlwaysAcceptAttachmentConstraint
-            )
-            val builder = TransactionBuilder()
-                    .addOutputState(outputState)
-                    .addCommand(DummyCommandData, counterparty.owningKey)
-
-            val wtx = builder.toWireTransaction(serviceHub, KryoScheme.SCHEME_ID)
+            val wtx = createWireTx(serviceHub, counterparty, counterparty.owningKey, KryoScheme.SCHEME_ID)
             val session = initiateFlow(counterparty)
             session.send(wtx)
             return session.receive<Boolean>().unwrap {it}
         }
     }
 
+    @StartableByRPC
+    class CreateWireTxFlow(val counterparty: Party) : FlowLogic<WireTransaction>() {
+        @Suspendable
+        override fun call(): WireTransaction {
+            return createWireTx(serviceHub, counterparty, counterparty.owningKey, KryoScheme.SCHEME_ID)
+        }
+    }
+
     @InitiatedBy(SendFlow::class)
     class ReceiveFlow(private val session: FlowSession): FlowLogic<Unit>() {
         @Suspendable

node/src/integration-test/kotlin/net/corda/node/CustomSerializationSchemeMockNetworkTest.kt

@@ -0,0 +1,62 @@
+package net.corda.node
+
+import net.corda.core.crypto.SecureHash
+import net.corda.core.serialization.SerializedBytes
+import net.corda.core.serialization.deserialize
+import net.corda.node.CustomSerializationSchemeDriverTest.CreateWireTxFlow
+import net.corda.node.CustomSerializationSchemeDriverTest.WriteTxToLedgerFlow
+import net.corda.testing.core.ALICE_NAME
+import net.corda.testing.core.BOB_NAME
+import net.corda.testing.node.internal.CustomCordapp
+import net.corda.testing.node.internal.InternalMockNetwork
+import net.corda.testing.node.internal.InternalMockNodeParameters
+import net.corda.testing.node.internal.enclosedCordapp
+import net.corda.testing.node.internal.startFlow
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+
+class CustomSerializationSchemeMockNetworkTest {
+
+    private lateinit var mockNetwork : InternalMockNetwork
+
+    val customSchemeCordapp: CustomCordapp = CustomSerializationSchemeDriverTest().enclosedCordapp()
+
+    @Before
+    fun setup() {
+        mockNetwork = InternalMockNetwork(cordappsForAllNodes = listOf(customSchemeCordapp))
+    }
+
+    @After
+    fun shutdown() {
+        mockNetwork.stopNodes()
+    }
+
+    @Test(timeout = 300_000)
+    fun `transactions network parameter hash is correct`() {
+        val alice = mockNetwork.createNode(InternalMockNodeParameters(legalName = ALICE_NAME))
+        val bob = mockNetwork.createNode(InternalMockNodeParameters(legalName = BOB_NAME))
+        val flow = alice.services.startFlow (CreateWireTxFlow(bob.info.legalIdentities.single()))
+        mockNetwork.runNetwork()
+        val wireTx =  flow.resultFuture.get()
+        /** The NetworkParmeters is the last component in the list of component groups. If we ever change this this
+         *  in [net.corda.core.internal.createComponentGroups] this test will need to be updated.*/
+        val serializedHash = SerializedBytes<SecureHash>(wireTx.componentGroups.last().components.single().bytes)
+        assertEquals(alice.internals.networkParametersStorage.defaultHash, serializedHash.deserialize())
+    }
+
+    @Test(timeout = 300_000)
+    fun `transaction can be written to the ledger`() {
+        val alice = mockNetwork.createNode(InternalMockNodeParameters(legalName = ALICE_NAME))
+        val bob = mockNetwork.createNode(InternalMockNodeParameters(legalName = BOB_NAME))
+        val flow = alice.services.startFlow (WriteTxToLedgerFlow(bob.info.legalIdentities.single(),
+                mockNetwork.notaryNodes.single().info.legalIdentities.single()))
+        mockNetwork.runNetwork()
+        val txId = flow.resultFuture.get()
+        val getTxFlow = bob.services.startFlow(CustomSerializationSchemeDriverTest.GetTxFromDBFlow(txId))
+        mockNetwork.runNetwork()
+        assertNotNull(getTxFlow.resultFuture.get())
+    }
+}

testing/node-driver/src/main/kotlin/net/corda/testing/node/internal/MockNetworkParametersService.kt

@@ -20,17 +20,28 @@ import java.time.Instant
 class MockNetworkParametersStorage(private var currentParameters: NetworkParameters = testNetworkParameters(modifiedTime = Instant.MIN)) : NetworkParametersStorage {
     private val hashToParametersMap: HashMap<SecureHash, NetworkParameters> = HashMap()
     private val hashToSignedParametersMap: HashMap<SecureHash, SignedNetworkParameters> = HashMap()
+    override var currentHash = currentParameters.computeHash()
+    override val defaultHash: SecureHash get() = currentHash
     init {
         storeCurrentParameters()
     }
 
+    private fun NetworkParameters.computeHash(): SecureHash {
+        return withTestSerializationEnvIfNotSet {
+            this.serialize().hash
+        }
+    }
+
     fun setCurrentParametersUnverified(networkParameters: NetworkParameters) {
         currentParameters = networkParameters
+        currentHash = currentParameters.computeHash()
         storeCurrentParameters()
     }
 
     override fun setCurrentParameters(currentSignedParameters: SignedDataWithCert<NetworkParameters>, trustRoots: Set<X509Certificate>) {
-        setCurrentParametersUnverified(currentSignedParameters.verifiedNetworkParametersCert(trustRoots))
+        currentParameters = currentSignedParameters.verifiedNetworkParametersCert(trustRoots)
+        currentHash = currentSignedParameters.raw.hash
+        storeCurrentParameters()
     }
 
     override fun lookupSigned(hash: SecureHash): SignedDataWithCert<NetworkParameters>? {
@@ -39,13 +50,6 @@ class MockNetworkParametersStorage(private var currentParameters: NetworkParamet
 
     override fun hasParameters(hash: SecureHash): Boolean = hash in hashToParametersMap
 
-    override val currentHash: SecureHash
-        get() {
-            return withTestSerializationEnvIfNotSet {
-                currentParameters.serialize().hash
-            }
-        }
-    override val defaultHash: SecureHash get() = currentHash
     override fun lookup(hash: SecureHash): NetworkParameters? = hashToParametersMap[hash]
     override fun getEpochFromHash(hash: SecureHash): Int? = lookup(hash)?.epoch
     override fun saveParameters(signedNetworkParameters: SignedDataWithCert<NetworkParameters>) {