CORDA-941 - Instead of storing the network map contract implementation whitelist along with (#2581)

the constraint, pass it in during verification on LedgerTransaction

.ci/api-current.txt

@@ -338,17 +338,6 @@ public final class net.corda.core.contracts.ComponentGroupEnum extends java.lang
   public static net.corda.core.contracts.ComponentGroupEnum valueOf(String)
   public static net.corda.core.contracts.ComponentGroupEnum[] values()
 ##
-@net.corda.core.serialization.CordaSerializable public final class net.corda.core.contracts.ConstraintAttachment extends java.lang.Object implements net.corda.core.contracts.Attachment
-  public <init>(net.corda.core.contracts.ContractAttachment, String)
-  public void extractFile(String, java.io.OutputStream)
-  @org.jetbrains.annotations.NotNull public final net.corda.core.contracts.ContractAttachment getContractAttachment()
-  @org.jetbrains.annotations.NotNull public net.corda.core.crypto.SecureHash getId()
-  @org.jetbrains.annotations.NotNull public List getSigners()
-  public int getSize()
-  @org.jetbrains.annotations.NotNull public final String getStateContract()
-  @org.jetbrains.annotations.NotNull public java.io.InputStream open()
-  @org.jetbrains.annotations.NotNull public jar.JarInputStream openAsJAR()
-##
 @net.corda.core.serialization.CordaSerializable public interface net.corda.core.contracts.Contract
   public abstract void verify(net.corda.core.transactions.LedgerTransaction)
 ##
@@ -641,7 +630,6 @@ public static final class net.corda.core.contracts.UniqueIdentifier$Companion ex
   @org.jetbrains.annotations.NotNull public abstract net.corda.core.contracts.ContractState upgrade(net.corda.core.contracts.ContractState)
 ##
 @net.corda.core.serialization.CordaSerializable @net.corda.core.DoNotImplement public final class net.corda.core.contracts.WhitelistedByZoneAttachmentConstraint extends java.lang.Object implements net.corda.core.contracts.AttachmentConstraint
-  public <init>(Map)
   public boolean isSatisfiedBy(net.corda.core.contracts.Attachment)
 ##
 @net.corda.core.DoNotImplement public interface net.corda.core.cordapp.Cordapp

core/src/main/kotlin/net/corda/core/contracts/AttachmentConstraint.kt

@@ -1,8 +1,9 @@
 package net.corda.core.contracts
 
 import net.corda.core.DoNotImplement
+import net.corda.core.contracts.AlwaysAcceptAttachmentConstraint.isSatisfiedBy
 import net.corda.core.crypto.SecureHash
-import net.corda.core.node.services.AttachmentId
+import net.corda.core.internal.AttachmentWithContext
 import net.corda.core.serialization.CordaSerializable
 
 /** Constrain which contract-code-containing attachment can be used with a [ContractState]. */
@@ -27,18 +28,14 @@ data class HashAttachmentConstraint(val attachmentId: SecureHash) : AttachmentCo
  * An [AttachmentConstraint] that verifies that the hash of the attachment is in the network parameters whitelist.
  * See: [net.corda.core.node.NetworkParameters.whitelistedContractImplementations]
  * It allows for centralized control over the cordapps that can be used.
- *
- * @param whitelistedContractImplementations whitelisted attachment IDs by contract class name.
  */
-class WhitelistedByZoneAttachmentConstraint(private val whitelistedContractImplementations: Map<String, List<AttachmentId>>) : AttachmentConstraint {
+object WhitelistedByZoneAttachmentConstraint : AttachmentConstraint {
-
     override fun isSatisfiedBy(attachment: Attachment): Boolean {
-        return whitelistedContractImplementations.let { whitelist ->
+        return if (attachment is AttachmentWithContext) {
-            when (attachment) {
+            val whitelist = attachment.whitelistedContractImplementations
-                is ConstraintAttachment -> attachment.id in (whitelist[attachment.stateContract] ?: emptyList())
+                    ?: throw IllegalStateException("Unable to verify WhitelistedByZoneAttachmentConstraint - whitelist not specified")
-                else -> false
+            attachment.id in (whitelist[attachment.stateContract] ?: emptyList())
-            }
+        } else false
-        }
     }
 }
 
@@ -56,16 +53,4 @@ object AutomaticHashConstraint : AttachmentConstraint {
     override fun isSatisfiedBy(attachment: Attachment): Boolean {
         throw UnsupportedOperationException("Contracts cannot be satisfied by an AutomaticHashConstraint placeholder")
     }
-}
+}
-
-/**
- * Used only for passing to the Attachment constraint verification.
- * Encapsulates a [ContractAttachment] and the state contract
- */
-class ConstraintAttachment(val contractAttachment: ContractAttachment, val stateContract: ContractClassName) : Attachment by contractAttachment {
-    init {
-        require(stateContract in contractAttachment.allContracts) {
-            "This ConstraintAttachment was not initialised properly"
-        }
-    }
-}

core/src/main/kotlin/net/corda/core/internal/AttachmentWithContext.kt

@@ -0,0 +1,22 @@
+package net.corda.core.internal
+
+import net.corda.core.contracts.Attachment
+import net.corda.core.contracts.ContractAttachment
+import net.corda.core.contracts.ContractClassName
+import net.corda.core.node.services.AttachmentId
+
+/**
+ * Used only for passing to the Attachment constraint verification.
+ */
+class AttachmentWithContext(
+        val contractAttachment: ContractAttachment,
+        val stateContract: ContractClassName,
+        /** Required for verifying [WhitelistedByZoneAttachmentConstraint] */
+        val whitelistedContractImplementations: Map<String, List<AttachmentId>>?
+) : Attachment by contractAttachment {
+    init {
+        require(stateContract in contractAttachment.allContracts) {
+            "This AttachmentWithContext was not initialised properly"
+        }
+    }
+}

core/src/main/kotlin/net/corda/core/transactions/LedgerTransaction.kt

@@ -3,9 +3,11 @@ package net.corda.core.transactions
 import net.corda.core.contracts.*
 import net.corda.core.crypto.SecureHash
 import net.corda.core.identity.Party
+import net.corda.core.internal.AttachmentWithContext
 import net.corda.core.internal.UpgradeCommand
 import net.corda.core.internal.castIfPossible
 import net.corda.core.internal.uncheckedCast
+import net.corda.core.node.NetworkParameters
 import net.corda.core.serialization.CordaSerializable
 import net.corda.core.utilities.Try
 import java.security.PublicKey
@@ -27,7 +29,7 @@ import java.util.function.Predicate
 // currently sends this across to out-of-process verifiers. We'll need to change that first.
 // DOCSTART 1
 @CordaSerializable
-data class LedgerTransaction(
+data class LedgerTransaction @JvmOverloads constructor(
         /** The resolved input states which will be consumed/invalidated by the execution of this transaction. */
         override val inputs: List<StateAndRef<ContractState>>,
         override val outputs: List<TransactionState<ContractState>>,
@@ -39,7 +41,8 @@ data class LedgerTransaction(
         override val id: SecureHash,
         override val notary: Party?,
         val timeWindow: TimeWindow?,
-        val privacySalt: PrivacySalt
+        val privacySalt: PrivacySalt,
+        private val networkParameters: NetworkParameters? = null
 ) : FullTransaction() {
     //DOCEND 1
     init {
@@ -108,7 +111,8 @@ data class LedgerTransaction(
             }
 
             val contractAttachment = uniqueAttachmentsForStateContract.first()
-            if (!state.constraint.isSatisfiedBy(ConstraintAttachment(contractAttachment, state.contract))) {
+            val constraintAttachment = AttachmentWithContext(contractAttachment, state.contract, networkParameters?.whitelistedContractImplementations)
+            if (!state.constraint.isSatisfiedBy(constraintAttachment)) {
                 throw TransactionVerificationException.ContractConstraintRejection(id, state.contract)
             }
         }
@@ -414,5 +418,17 @@ data class LedgerTransaction(
      * @throws IllegalArgumentException if no item matches the id.
      */
     fun getAttachment(id: SecureHash): Attachment = attachments.first { it.id == id }
+
+    fun copy(inputs: List<StateAndRef<ContractState>>,
+             outputs: List<TransactionState<ContractState>>,
+             commands: List<CommandWithParties<CommandData>>,
+             attachments: List<Attachment>,
+             id: SecureHash,
+             notary: Party?,
+             timeWindow: TimeWindow?,
+             privacySalt: PrivacySalt
+    ) = copy(inputs, outputs, commands, attachments, id, notary, timeWindow, privacySalt, null)
 }
 
+
+

core/src/main/kotlin/net/corda/core/transactions/TransactionBuilder.kt

@@ -103,7 +103,7 @@ open class TransactionBuilder(
         val resolvedOutputs = outputs.map { state ->
             when {
                 state.constraint !is AutomaticHashConstraint -> state
-                useWhitelistedByZoneAttachmentConstraint(state.contract, services.networkParameters) -> state.copy(constraint = WhitelistedByZoneAttachmentConstraint(services.networkParameters.whitelistedContractImplementations))
+                useWhitelistedByZoneAttachmentConstraint(state.contract, services.networkParameters) -> state.copy(constraint = WhitelistedByZoneAttachmentConstraint)
                 else -> services.cordappProvider.getContractAttachmentID(state.contract)?.let {
                     state.copy(constraint = HashAttachmentConstraint(it))
                 } ?: throw MissingContractAttachments(listOf(state))

core/src/main/kotlin/net/corda/core/transactions/WireTransaction.kt

@@ -5,6 +5,7 @@ import net.corda.core.contracts.ComponentGroupEnum.*
 import net.corda.core.crypto.*
 import net.corda.core.identity.Party
 import net.corda.core.internal.Emoji
+import net.corda.core.node.NetworkParameters
 import net.corda.core.node.ServicesForResolution
 import net.corda.core.node.services.AttachmentId
 import net.corda.core.serialization.CordaSerializable
@@ -88,7 +89,7 @@ class WireTransaction(componentGroups: List<ComponentGroup>, val privacySalt: Pr
                 resolveIdentity = { services.identityService.partyFromKey(it) },
                 resolveAttachment = { services.attachments.openAttachment(it) },
                 resolveStateRef = { services.loadState(it) },
-                maxTransactionSize = services.networkParameters.maxTransactionSize
+                networkParameters = services.networkParameters
         )
     }
 
@@ -107,14 +108,14 @@ class WireTransaction(componentGroups: List<ComponentGroup>, val privacySalt: Pr
             resolveStateRef: (StateRef) -> TransactionState<*>?,
             resolveContractAttachment: (TransactionState<ContractState>) -> AttachmentId?
     ): LedgerTransaction {
-        return toLedgerTransactionInternal(resolveIdentity, resolveAttachment, resolveStateRef, 10485760)
+        return toLedgerTransactionInternal(resolveIdentity, resolveAttachment, resolveStateRef,null)
     }
 
     private fun toLedgerTransactionInternal(
             resolveIdentity: (PublicKey) -> Party?,
             resolveAttachment: (SecureHash) -> Attachment?,
             resolveStateRef: (StateRef) -> TransactionState<*>?,
-            maxTransactionSize: Int
+            networkParameters: NetworkParameters?
     ): LedgerTransaction {
         // Look up public keys to authenticated identities.
         val authenticatedArgs = commands.map {
@@ -125,8 +126,8 @@ class WireTransaction(componentGroups: List<ComponentGroup>, val privacySalt: Pr
             resolveStateRef(ref)?.let { StateAndRef(it, ref) } ?: throw TransactionResolutionException(ref.txhash)
         }
         val attachments = attachments.map { resolveAttachment(it) ?: throw AttachmentResolutionException(it) }
-        val ltx = LedgerTransaction(resolvedInputs, outputs, authenticatedArgs, attachments, id, notary, timeWindow, privacySalt)
+        val ltx = LedgerTransaction(resolvedInputs, outputs, authenticatedArgs, attachments, id, notary, timeWindow, privacySalt, networkParameters)
-        checkTransactionSize(ltx, maxTransactionSize)
+        checkTransactionSize(ltx, networkParameters?.maxTransactionSize ?: 10485760)
         return ltx
     }