DA5-22: Distribution and validation of draft transactions

gradle.properties

@@ -5,7 +5,7 @@ cordaProductVersion = 5.2.0
 # NOTE: update this each time this module contains a breaking change
 ## NOTE: currently this is a top level revision, so all API versions will line up, but this could be moved to
 ##   a per module property in which case module versions can change independently.
-cordaApiRevision = 26
+cordaApiRevision = 27
 
 # Main
 kotlin.stdlib.default.dependency = false

ledger/ledger-utxo/scans/corda-ledger-utxo-5.2.0.yaml

@@ -474,6 +474,18 @@ net.corda.v5.ledger.utxo.UtxoLedgerService:
           annotation:
             - NotNull
           type: net.corda.v5.ledger.utxo.transaction.UtxoTransactionValidator
+    receiveLedgerTransaction:
+      annotations:
+        - Suspendable
+        - NotNull
+      default: false
+      type: public abstract
+      returnType: net.corda.v5.ledger.utxo.transaction.UtxoLedgerTransaction
+      params:
+        session:
+          annotation:
+            - NotNull
+          type: net.corda.v5.application.messaging.FlowSession
     receiveTransaction:
       annotations:
         - Suspendable
@@ -526,6 +538,21 @@ net.corda.v5.ledger.utxo.UtxoLedgerService:
           annotation:
             - NotNull
           type: net.corda.v5.application.messaging.FlowSession
+    sendAsLedgerTransaction:
+      annotations:
+        - Suspendable
+      default: false
+      type: public abstract
+      returnType: void
+      params:
+        signedTransaction:
+          annotation:
+            - NotNull
+          type: net.corda.v5.ledger.utxo.transaction.UtxoSignedTransaction
+        sessions:
+          annotation:
+            - NotNull
+          type: java.util.List<net.corda.v5.application.messaging.FlowSession>
     sendTransaction:
       annotations:
         - Suspendable

ledger/ledger-utxo/src/main/java/net/corda/v5/ledger/utxo/UtxoLedgerService.java

@@ -283,6 +283,30 @@ UtxoSignedTransaction receiveTransaction(
             @NotNull FlowSession session
     );
 
+    /**
+     * Sends an unsigned copy of the base LedgerTransaction to counterparty sessions.
+     *
+     * @param signedTransaction The {@link UtxoSignedTransaction} whose correspondent {@link UtxoLedgerTransaction} will be sent.
+     * @param sessions The counterparties who receive the transaction.
+     */
+    @Suspendable
+    void sendAsLedgerTransaction(
+            @NotNull UtxoSignedTransaction signedTransaction,
+            @NotNull List<FlowSession> sessions
+    );
+
+    /**
+     * Receives a ledger transaction from the counterparty session.
+     *
+     * @param session The counterparty to receive a transaction from.
+     * @return the {@link UtxoLedgerTransaction} received from counterparty.
+     */
+    @NotNull
+    @Suspendable
+    UtxoLedgerTransaction receiveLedgerTransaction(
+            @NotNull FlowSession session
+    );
+
     /**
      * Creates a query object for a vault named query with the given name. This query can be executed later by calling
      * {@link PagedQuery#execute()}.