Moved IBFT Message factory to use wrapped message types (#744)

Signed-off-by: Adrian Sutton <adrian.sutton@consensys.net>

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/support/RoundSpecificPeers.java

@@ -23,6 +23,8 @@ import tech.pegasys.pantheon.consensus.ibft.messagedata.NewRoundMessageData;
 import tech.pegasys.pantheon.consensus.ibft.messagedata.PrepareMessageData;
 import tech.pegasys.pantheon.consensus.ibft.messagedata.ProposalMessageData;
 import tech.pegasys.pantheon.consensus.ibft.messagedata.RoundChangeMessageData;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.IbftMessage;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
 import tech.pegasys.pantheon.consensus.ibft.payload.Payload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
@@ -80,7 +82,7 @@ public class RoundSpecificPeers {
       final ConsensusRoundIdentifier targetRound) {
     return nonProposingPeers
         .stream()
-        .map(peer -> peer.injectRoundChange(targetRound, empty()))
+        .map(peer -> peer.injectRoundChange(targetRound, empty()).getSignedPayload())
         .collect(Collectors.toList());
   }
 
@@ -89,20 +91,24 @@ public class RoundSpecificPeers {
   }
 
   public List<SignedData<RoundChangePayload>> roundChange(final ConsensusRoundIdentifier roundId) {
-    final List<SignedData<RoundChangePayload>> changes = Lists.newArrayList();
+    final List<RoundChange> changes = Lists.newArrayList();
 
     for (final ValidatorPeer peer : peers) {
       changes.add(peer.injectRoundChange(roundId, empty()));
     }
 
-    return changes;
+    return changes.stream().map(RoundChange::getSignedPayload).collect(Collectors.toList());
   }
 
   public List<SignedData<RoundChangePayload>> createSignedRoundChangePayload(
       final ConsensusRoundIdentifier roundId) {
     return peers
         .stream()
-        .map(p -> p.getMessageFactory().createSignedRoundChangePayload(roundId, empty()))
+        .map(
+            p ->
+                p.getMessageFactory()
+                    .createSignedRoundChangePayload(roundId, empty())
+                    .getSignedPayload())
         .collect(Collectors.toList());
   }
 
@@ -113,7 +119,8 @@ public class RoundSpecificPeers {
         .map(
             p ->
                 p.getMessageFactory()
-                    .createSignedRoundChangePayload(roundId, Optional.of(preparedCertificate)))
+                    .createSignedRoundChangePayload(roundId, Optional.of(preparedCertificate))
+                    .getSignedPayload())
         .collect(Collectors.toList());
   }
 
@@ -125,11 +132,15 @@ public class RoundSpecificPeers {
     nonProposingPeers.forEach(peer -> peer.injectCommit(roundId, hash));
   }
 
-  Collection<SignedData<PreparePayload>> createSignedPreparePayloadOfNonProposing(
+  public Collection<SignedData<PreparePayload>> createSignedPreparePayloadOfNonProposing(
       final ConsensusRoundIdentifier preparedRound, final Hash hash) {
     return nonProposingPeers
         .stream()
-        .map(role -> role.getMessageFactory().createSignedPreparePayload(preparedRound, hash))
+        .map(
+            role ->
+                role.getMessageFactory()
+                    .createSignedPreparePayload(preparedRound, hash)
+                    .getSignedPayload())
         .collect(Collectors.toList());
   }
 
@@ -146,38 +157,35 @@ public class RoundSpecificPeers {
   }
 
   @SafeVarargs
-  public final void verifyMessagesReceivedPropser(final SignedData<? extends Payload>... msgs) {
+  public final void verifyMessagesReceivedProposer(final IbftMessage<? extends Payload>... msgs) {
     verifyMessagesReceived(ImmutableList.of(proposer), msgs);
   }
 
   @SafeVarargs
   public final void verifyMessagesReceivedNonPropsingExcluding(
-      final ValidatorPeer exclude, final SignedData<? extends Payload>... msgs) {
+      final ValidatorPeer exclude, final IbftMessage<? extends Payload>... msgs) {
     final Collection<ValidatorPeer> candidates = Lists.newArrayList(nonProposingPeers);
     candidates.remove(exclude);
     verifyMessagesReceived(candidates, msgs);
   }
 
-  @SafeVarargs
+  public final void verifyMessagesReceivedNonPropsing(final IbftMessage<?>... msgs) {
-  public final void verifyMessagesReceivedNonPropsing(final SignedData<? extends Payload>... msgs) {
     verifyMessagesReceived(nonProposingPeers, msgs);
   }
 
-  @SafeVarargs
+  public final void verifyMessagesReceived(final IbftMessage<?>... msgs) {
-  public final void verifyMessagesReceived(final SignedData<? extends Payload>... msgs) {
     verifyMessagesReceived(peers, msgs);
   }
 
-  @SafeVarargs
+  private void verifyMessagesReceived(
-  private final void verifyMessagesReceived(
+      final Collection<ValidatorPeer> candidates, final IbftMessage<?>... msgs) {
-      final Collection<ValidatorPeer> candidates, final SignedData<? extends Payload>... msgs) {
     candidates.forEach(n -> assertThat(n.getReceivedMessages().size()).isEqualTo(msgs.length));
 
-    List<SignedData<? extends Payload>> msgList = Arrays.asList(msgs);
+    List<IbftMessage<? extends Payload>> msgList = Arrays.asList(msgs);
 
     for (int i = 0; i < msgList.size(); i++) {
       final int index = i;
-      final SignedData<? extends Payload> msg = msgList.get(index);
+      final IbftMessage<? extends Payload> msg = msgList.get(index);
       candidates.forEach(
           n -> {
             final List<MessageData> rxMsgs = n.getReceivedMessages();
@@ -188,36 +196,29 @@ public class RoundSpecificPeers {
     candidates.forEach(ValidatorPeer::clearReceivedMessages);
   }
 
-  private void verifyMessage(
+  private void verifyMessage(final MessageData actual, final IbftMessage<?> expectedMessage) {
-      final MessageData actual, final SignedData<? extends Payload> signedExpectedPayload) {
+    IbftMessage<?> actualSignedPayload = null;
-    final Payload expectedPayload = signedExpectedPayload.getPayload();
-    SignedData<?> actualSignedPayload = null;
 
-    switch (expectedPayload.getMessageType()) {
+    switch (expectedMessage.getMessageType()) {
       case IbftV2.PROPOSAL:
-        actualSignedPayload =
+        actualSignedPayload = ProposalMessageData.fromMessageData(actual).decode();
-            ProposalMessageData.fromMessageData(actual).decode().getSignedPayload();
         break;
       case IbftV2.PREPARE:
-        actualSignedPayload =
+        actualSignedPayload = PrepareMessageData.fromMessageData(actual).decode();
-            PrepareMessageData.fromMessageData(actual).decode().getSignedPayload();
         break;
       case IbftV2.COMMIT:
-        actualSignedPayload = CommitMessageData.fromMessageData(actual).decode().getSignedPayload();
+        actualSignedPayload = CommitMessageData.fromMessageData(actual).decode();
         break;
       case IbftV2.NEW_ROUND:
-        actualSignedPayload =
+        actualSignedPayload = NewRoundMessageData.fromMessageData(actual).decode();
-            NewRoundMessageData.fromMessageData(actual).decode().getSignedPayload();
         break;
       case IbftV2.ROUND_CHANGE:
-        actualSignedPayload =
+        actualSignedPayload = RoundChangeMessageData.fromMessageData(actual).decode();
-            RoundChangeMessageData.fromMessageData(actual).decode().getSignedPayload();
         break;
       default:
         fail("Illegal IBFTV2 message type.");
         break;
     }
-    assertThat(signedExpectedPayload)
+    assertThat(expectedMessage).isEqualToComparingFieldByFieldRecursively(actualSignedPayload);
-        .isEqualToComparingFieldByFieldRecursively(actualSignedPayload);
   }
 }

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/support/TestHelpers.java

@@ -15,11 +15,11 @@ package tech.pegasys.pantheon.consensus.ibft.support;
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.IbftBlockHashing;
 import tech.pegasys.pantheon.consensus.ibft.IbftExtraData;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.NewRound;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.NewRoundPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangeCertificate;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
@@ -44,7 +44,9 @@ public class TestHelpers {
 
     final MessageFactory messageFactory = new MessageFactory(signingKeyPair);
 
-    return messageFactory.createSignedCommitPayload(roundId, block.getHash(), commitSeal);
+    return messageFactory
+        .createSignedCommitPayload(roundId, block.getHash(), commitSeal)
+        .getSignedPayload();
   }
 
   public static PreparedCertificate createValidPreparedCertificate(
@@ -52,20 +54,26 @@ public class TestHelpers {
     final RoundSpecificPeers peers = context.roundSpecificPeers(preparedRound);
 
     return new PreparedCertificate(
-        peers.getProposer().getMessageFactory().createSignedProposalPayload(preparedRound, block),
+        peers
+            .getProposer()
+            .getMessageFactory()
+            .createSignedProposalPayload(preparedRound, block)
+            .getSignedPayload(),
         peers.createSignedPreparePayloadOfNonProposing(preparedRound, block.getHash()));
   }
 
-  public static SignedData<NewRoundPayload> injectEmptyNewRound(
+  public static NewRound injectEmptyNewRound(
       final ConsensusRoundIdentifier targetRoundId,
       final ValidatorPeer proposer,
       final List<SignedData<RoundChangePayload>> roundChangePayloads,
       final Block blockToPropose) {
 
-    final SignedData<ProposalPayload> proposal =
+    final Proposal proposal =
         proposer.getMessageFactory().createSignedProposalPayload(targetRoundId, blockToPropose);
 
     return proposer.injectNewRound(
-        targetRoundId, new RoundChangeCertificate(roundChangePayloads), proposal);
+        targetRoundId,
+        new RoundChangeCertificate(roundChangePayloads),
+        proposal.getSignedPayload());
   }
 }

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/support/ValidatorPeer.java

@@ -25,14 +25,10 @@ import tech.pegasys.pantheon.consensus.ibft.messagewrappers.NewRound;
 import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
 import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.NewRoundPayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
 import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangeCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.crypto.SECP256K1;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
@@ -82,20 +78,16 @@ public class ValidatorPeer {
     return nodeKeys;
   }
 
-  public SignedData<ProposalPayload> injectProposal(
+  public Proposal injectProposal(final ConsensusRoundIdentifier rId, final Block block) {
-      final ConsensusRoundIdentifier rId, final Block block) {
+    final Proposal payload = messageFactory.createSignedProposalPayload(rId, block);
-    final SignedData<ProposalPayload> payload =
-        messageFactory.createSignedProposalPayload(rId, block);
 
-    injectMessage(ProposalMessageData.create(new Proposal(payload)));
+    injectMessage(ProposalMessageData.create(payload));
     return payload;
   }
 
-  public SignedData<PreparePayload> injectPrepare(
+  public Prepare injectPrepare(final ConsensusRoundIdentifier rId, final Hash digest) {
-      final ConsensusRoundIdentifier rId, final Hash digest) {
+    final Prepare payload = messageFactory.createSignedPreparePayload(rId, digest);
-    final SignedData<PreparePayload> payload =
+    injectMessage(PrepareMessageData.create(payload));
-        messageFactory.createSignedPreparePayload(rId, digest);
-    injectMessage(PrepareMessageData.create(new Prepare(payload)));
     return payload;
   }
 
@@ -103,37 +95,35 @@ public class ValidatorPeer {
     return SECP256K1.sign(digest, nodeKeys);
   }
 
-  public SignedData<CommitPayload> injectCommit(
+  public Commit injectCommit(final ConsensusRoundIdentifier rId, final Hash digest) {
-      final ConsensusRoundIdentifier rId, final Hash digest) {
     final Signature commitSeal = SECP256K1.sign(digest, nodeKeys);
 
     return injectCommit(rId, digest, commitSeal);
   }
 
-  public SignedData<CommitPayload> injectCommit(
+  public Commit injectCommit(
       final ConsensusRoundIdentifier rId, final Hash digest, final Signature commitSeal) {
-    final SignedData<CommitPayload> payload =
+    final Commit payload = messageFactory.createSignedCommitPayload(rId, digest, commitSeal);
-        messageFactory.createSignedCommitPayload(rId, digest, commitSeal);
+    injectMessage(CommitMessageData.create(payload));
-    injectMessage(CommitMessageData.create(new Commit(payload)));
     return payload;
   }
 
-  public SignedData<NewRoundPayload> injectNewRound(
+  public NewRound injectNewRound(
       final ConsensusRoundIdentifier rId,
       final RoundChangeCertificate roundChangeCertificate,
       final SignedData<ProposalPayload> proposalPayload) {
 
-    final SignedData<NewRoundPayload> payload =
+    final NewRound payload =
         messageFactory.createSignedNewRoundPayload(rId, roundChangeCertificate, proposalPayload);
-    injectMessage(NewRoundMessageData.create(new NewRound(payload)));
+    injectMessage(NewRoundMessageData.create(payload));
     return payload;
   }
 
-  public SignedData<RoundChangePayload> injectRoundChange(
+  public RoundChange injectRoundChange(
       final ConsensusRoundIdentifier rId, final Optional<PreparedCertificate> preparedCertificate) {
-    final SignedData<RoundChangePayload> payload =
+    final RoundChange payload =
         messageFactory.createSignedRoundChangePayload(rId, preparedCertificate);
-    injectMessage(RoundChangeMessageData.create(new RoundChange(payload)));
+    injectMessage(RoundChangeMessageData.create(payload));
     return payload;
   }
 

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/FutureHeightTest.java

@@ -19,10 +19,9 @@ import static tech.pegasys.pantheon.consensus.ibft.support.TestHelpers.createSig
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.IbftHelpers;
 import tech.pegasys.pantheon.consensus.ibft.ibftevent.NewChainHead;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.support.RoundSpecificPeers;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContext;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContextBuilder;
@@ -89,13 +88,16 @@ public class FutureHeightTest {
         .getController()
         .handleNewBlockEvent(new NewChainHead(signedCurrentHeightBlock.getHeader()));
 
-    final SignedData<PreparePayload> expectedPrepareMessage =
+    final Prepare expectedPrepareMessage =
         localNodeMessageFactory.createSignedPreparePayload(
             futureHeightRoundId, futureHeightBlock.getHash());
 
-    final SignedData<CommitPayload> expectedCommitMessage =
+    final Commit expectedCommitMessage =
+        new Commit(
             createSignedCommitPayload(
-            futureHeightRoundId, futureHeightBlock, context.getLocalNodeParams().getNodeKeyPair());
+                futureHeightRoundId,
+                futureHeightBlock,
+                context.getLocalNodeParams().getNodeKeyPair()));
 
     peers.verifyMessagesReceived(expectedPrepareMessage, expectedCommitMessage);
     assertThat(context.getCurrentChainHeight()).isEqualTo(2);
@@ -110,7 +112,7 @@ public class FutureHeightTest {
     peers.getProposer().injectProposal(roundId, currentHeightBlock);
     peers.getNonProposing(0).injectPrepare(roundId, currentHeightBlock.getHash());
 
-    final SignedData<PreparePayload> expectedPrepareMessage =
+    final Prepare expectedPrepareMessage =
         localNodeMessageFactory.createSignedPreparePayload(roundId, currentHeightBlock.getHash());
 
     peers.verifyMessagesReceived(expectedPrepareMessage);
@@ -148,9 +150,10 @@ public class FutureHeightTest {
     // Should only require 1 more prepare to close it out
     peers.getNonProposing(1).injectPrepare(roundId, currentHeightBlock.getHash());
 
-    final SignedData<CommitPayload> expectedCommitMessage =
+    final Commit expectedCommitMessage =
+        new Commit(
             createSignedCommitPayload(
-            roundId, currentHeightBlock, context.getLocalNodeParams().getNodeKeyPair());
+                roundId, currentHeightBlock, context.getLocalNodeParams().getNodeKeyPair()));
     peers.verifyMessagesReceived(expectedCommitMessage);
   }
 
@@ -185,7 +188,7 @@ public class FutureHeightTest {
     peers.verifyNoMessagesReceived();
     peers.getProposer().injectProposal(nextHeightRoundId, nextHeightBlock);
 
-    final SignedData<PreparePayload> expectedPrepareMessage =
+    final Prepare expectedPrepareMessage =
         localNodeMessageFactory.createSignedPreparePayload(
             nextHeightRoundId, nextHeightBlock.getHash());
 
@@ -202,13 +205,16 @@ public class FutureHeightTest {
         .getController()
         .handleNewBlockEvent(new NewChainHead(signedNextHeightBlock.getHeader()));
 
-    final SignedData<PreparePayload> expectedFuturePrepareMessage =
+    final Prepare expectedFuturePrepareMessage =
         localNodeMessageFactory.createSignedPreparePayload(
             futureHeightRoundId, futureHeightBlock.getHash());
 
-    final SignedData<CommitPayload> expectedCommitMessage =
+    final Commit expectedCommitMessage =
+        new Commit(
             createSignedCommitPayload(
-            futureHeightRoundId, futureHeightBlock, context.getLocalNodeParams().getNodeKeyPair());
+                futureHeightRoundId,
+                futureHeightBlock,
+                context.getLocalNodeParams().getNodeKeyPair()));
 
     // Assert ONLY a prepare message was received, not any commits (i.e. futureHeightRoundId
     // messages have not been used.

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/FutureRoundTest.java

@@ -17,10 +17,9 @@ import static tech.pegasys.pantheon.consensus.ibft.support.TestHelpers.injectEmp
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.IbftHelpers;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.support.RoundSpecificPeers;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContext;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContextBuilder;
@@ -99,7 +98,7 @@ public class FutureRoundTest {
         futurePeers.createSignedRoundChangePayload(futureRoundId),
         futureBlock);
 
-    final SignedData<PreparePayload> expectedPrepare =
+    final Prepare expectedPrepare =
         localNodeMessageFactory.createSignedPreparePayload(futureRoundId, futureBlock.getHash());
 
     peers.verifyMessagesReceived(expectedPrepare);
@@ -107,7 +106,7 @@ public class FutureRoundTest {
     // following 1 more prepare, a commit msg will be sent
     futurePeers.getNonProposing(quorum - 3).injectPrepare(futureRoundId, futureBlock.getHash());
 
-    final SignedData<CommitPayload> expectedCommit =
+    final Commit expectedCommit =
         localNodeMessageFactory.createSignedCommitPayload(
             futureRoundId,
             futureBlock.getHash(),
@@ -143,7 +142,7 @@ public class FutureRoundTest {
         futurePeers.createSignedRoundChangePayload(futureRoundId),
         futureBlock);
 
-    final SignedData<PreparePayload> expectedFuturePrepare =
+    final Prepare expectedFuturePrepare =
         localNodeMessageFactory.createSignedPreparePayload(futureRoundId, futureBlock.getHash());
     peers.verifyMessagesReceived(expectedFuturePrepare);
 

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/GossipTest.java

@@ -19,15 +19,13 @@ import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.IbftHelpers;
 import tech.pegasys.pantheon.consensus.ibft.ibftevent.NewChainHead;
 import tech.pegasys.pantheon.consensus.ibft.messagedata.ProposalMessageData;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.NewRound;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
 import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.NewRoundPayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangeCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.support.RoundSpecificPeers;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContext;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContextBuilder;
@@ -75,29 +73,29 @@ public class GossipTest {
 
   @Test
   public void gossipMessagesToPeers() {
-    SignedData<PreparePayload> localPrepare =
+    final Prepare localPrepare =
         context.getLocalNodeMessageFactory().createSignedPreparePayload(roundId, block.getHash());
     peers.verifyNoMessagesReceivedNonProposing();
 
-    final SignedData<ProposalPayload> proposal = sender.injectProposal(roundId, block);
+    final Proposal proposal = sender.injectProposal(roundId, block);
     // sender node will have a prepare message as an effect of the proposal being sent
     peers.verifyMessagesReceivedNonPropsing(proposal, localPrepare);
-    peers.verifyMessagesReceivedPropser(localPrepare);
+    peers.verifyMessagesReceivedProposer(localPrepare);
 
-    final SignedData<PreparePayload> prepare = sender.injectPrepare(roundId, block.getHash());
+    final Prepare prepare = sender.injectPrepare(roundId, block.getHash());
     peers.verifyMessagesReceivedNonPropsing(prepare);
     peers.verifyNoMessagesReceivedProposer();
 
-    final SignedData<CommitPayload> commit = sender.injectCommit(roundId, block.getHash());
+    final Commit commit = sender.injectCommit(roundId, block.getHash());
     peers.verifyMessagesReceivedNonPropsing(commit);
     peers.verifyNoMessagesReceivedProposer();
 
-    final SignedData<RoundChangePayload> roundChange =
+    final RoundChange roundChange =
         msgFactory.createSignedRoundChangePayload(roundId, Optional.empty());
     final RoundChangeCertificate roundChangeCert =
-        new RoundChangeCertificate(singleton(roundChange));
+        new RoundChangeCertificate(singleton(roundChange.getSignedPayload()));
-    SignedData<NewRoundPayload> newRound =
+    final NewRound newRound =
-        sender.injectNewRound(roundId, roundChangeCert, proposal);
+        sender.injectNewRound(roundId, roundChangeCert, proposal.getSignedPayload());
     peers.verifyMessagesReceivedNonPropsing(newRound);
     peers.verifyNoMessagesReceivedProposer();
 
@@ -108,7 +106,7 @@ public class GossipTest {
 
   @Test
   public void onlyGossipOnce() {
-    final SignedData<PreparePayload> prepare = sender.injectPrepare(roundId, block.getHash());
+    final Prepare prepare = sender.injectPrepare(roundId, block.getHash());
     peers.verifyMessagesReceivedNonPropsing(prepare);
 
     sender.injectPrepare(roundId, block.getHash());
@@ -122,10 +120,10 @@ public class GossipTest {
   public void messageWithUnknownValidatorIsNotGossiped() {
     final KeyPair unknownKeyPair = KeyPair.generate();
     final MessageFactory unknownMsgFactory = new MessageFactory(unknownKeyPair);
-    final SignedData<ProposalPayload> unknownProposal =
+    final Proposal unknownProposal = unknownMsgFactory.createSignedProposalPayload(roundId, block);
-        unknownMsgFactory.createSignedProposalPayload(roundId, block);
 
-    sender.injectMessage(ProposalMessageData.create(new Proposal(unknownProposal)));
+    sender.injectMessage(
+        ProposalMessageData.create(new Proposal(unknownProposal.getSignedPayload())));
     peers.verifyNoMessagesReceived();
   }
 
@@ -133,10 +131,9 @@ public class GossipTest {
   public void messageIsNotGossipedToSenderOrCreator() {
     final ValidatorPeer msgCreator = peers.getFirstNonProposer();
     final MessageFactory peerMsgFactory = msgCreator.getMessageFactory();
-    final SignedData<ProposalPayload> proposalFromPeer =
+    final Proposal proposalFromPeer = peerMsgFactory.createSignedProposalPayload(roundId, block);
-        peerMsgFactory.createSignedProposalPayload(roundId, block);
 
-    sender.injectMessage(ProposalMessageData.create(new Proposal(proposalFromPeer)));
+    sender.injectMessage(ProposalMessageData.create(proposalFromPeer));
 
     peers.verifyMessagesReceivedNonPropsingExcluding(msgCreator, proposalFromPeer);
     peers.verifyNoMessagesReceivedProposer();
@@ -164,7 +161,7 @@ public class GossipTest {
         IbftHelpers.createSealedBlock(block, peers.sign(block.getHash()));
 
     ConsensusRoundIdentifier futureRoundId = new ConsensusRoundIdentifier(2, 0);
-    SignedData<PreparePayload> futurePrepare = sender.injectPrepare(futureRoundId, block.getHash());
+    Prepare futurePrepare = sender.injectPrepare(futureRoundId, block.getHash());
     peers.verifyNoMessagesReceivedNonProposing();
     ;
 

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/LocalNodeIsProposerTest.java

@@ -17,10 +17,9 @@ import static tech.pegasys.pantheon.consensus.ibft.support.TestHelpers.createSig
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.ibftevent.BlockTimerExpiry;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.support.RoundSpecificPeers;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContext;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContextBuilder;
@@ -58,8 +57,8 @@ public class LocalNodeIsProposerTest {
   private final MessageFactory localNodeMessageFactory = context.getLocalNodeMessageFactory();
 
   private Block expectedProposedBlock;
-  private SignedData<ProposalPayload> expectedTxProposal;
+  private Proposal expectedTxProposal;
-  private SignedData<CommitPayload> expectedTxCommit;
+  private Commit expectedTxCommit;
 
   @Before
   public void setup() {
@@ -68,8 +67,9 @@ public class LocalNodeIsProposerTest {
         localNodeMessageFactory.createSignedProposalPayload(roundId, expectedProposedBlock);
 
     expectedTxCommit =
+        new Commit(
             createSignedCommitPayload(
-            roundId, expectedProposedBlock, context.getLocalNodeParams().getNodeKeyPair());
+                roundId, expectedProposedBlock, context.getLocalNodeParams().getNodeKeyPair()));
 
     // Start the Controller, and trigger "block timer" to send proposal.
     context.getController().start();

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/LocalNodeNotProposerTest.java

@@ -16,10 +16,9 @@ import static org.assertj.core.api.Assertions.assertThat;
 import static tech.pegasys.pantheon.consensus.ibft.support.TestHelpers.createSignedCommitPayload;
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.support.RoundSpecificPeers;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContext;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContextBuilder;
@@ -46,8 +45,8 @@ public class LocalNodeNotProposerTest {
 
   private final Block blockToPropose = context.createBlockForProposalFromChainHead(0, 15);
 
-  private SignedData<PreparePayload> expectedTxPrepare;
+  private Prepare expectedTxPrepare;
-  private SignedData<CommitPayload> expectedTxCommit;
+  private Commit expectedTxCommit;
 
   @Before
   public void setup() {
@@ -55,8 +54,9 @@ public class LocalNodeNotProposerTest {
         localNodeMessageFactory.createSignedPreparePayload(roundId, blockToPropose.getHash());
 
     expectedTxCommit =
+        new Commit(
             createSignedCommitPayload(
-            roundId, blockToPropose, context.getLocalNodeParams().getNodeKeyPair());
+                roundId, blockToPropose, context.getLocalNodeParams().getNodeKeyPair()));
 
     context.getController().start();
   }

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/ReceivedNewRoundTest.java

@@ -15,11 +15,11 @@ package tech.pegasys.pantheon.consensus.ibft.tests;
 import static tech.pegasys.pantheon.consensus.ibft.support.TestHelpers.createValidPreparedCertificate;
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangeCertificate;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
@@ -71,9 +71,12 @@ public class ReceivedNewRoundTest {
     nextProposer.injectNewRound(
         targetRound,
         new RoundChangeCertificate(roundChanges),
-        nextProposer.getMessageFactory().createSignedProposalPayload(targetRound, blockToPropose));
+        nextProposer
+            .getMessageFactory()
+            .createSignedProposalPayload(targetRound, blockToPropose)
+            .getSignedPayload());
 
-    final SignedData<PreparePayload> expectedPrepare =
+    final Prepare expectedPrepare =
         localNodeMessageFactory.createSignedPreparePayload(targetRound, blockToPropose.getHash());
 
     peers.verifyMessagesReceived(expectedPrepare);
@@ -96,7 +99,8 @@ public class ReceivedNewRoundTest {
         new RoundChangeCertificate(roundChanges),
         illegalProposer
             .getMessageFactory()
-            .createSignedProposalPayload(nextRoundId, blockToPropose));
+            .createSignedProposalPayload(nextRoundId, blockToPropose)
+            .getSignedPayload());
 
     peers.verifyNoMessagesReceived();
   }
@@ -121,7 +125,8 @@ public class ReceivedNewRoundTest {
         peers
             .getNonProposing(0)
             .getMessageFactory()
-            .createSignedProposalPayload(nextRoundId, reproposedBlock));
+            .createSignedProposalPayload(nextRoundId, reproposedBlock)
+            .getSignedPayload());
 
     peers.verifyMessagesReceived(
         localNodeMessageFactory.createSignedPreparePayload(nextRoundId, reproposedBlock.getHash()));
@@ -141,14 +146,14 @@ public class ReceivedNewRoundTest {
     final ValidatorPeer interimRoundProposer =
         context.roundSpecificPeers(interimRound).getProposer();
 
-    final SignedData<ProposalPayload> proposal =
+    final Proposal proposal =
         interimRoundProposer
             .getMessageFactory()
             .createSignedProposalPayload(
                 interimRound, context.createBlockForProposalFromChainHead(1, 30));
 
     interimRoundProposer.injectNewRound(
-        interimRound, new RoundChangeCertificate(roundChangePayloads), proposal);
+        interimRound, new RoundChangeCertificate(roundChangePayloads), proposal.getSignedPayload());
 
     peers.verifyNoMessagesReceived();
   }
@@ -174,7 +179,8 @@ public class ReceivedNewRoundTest {
         peers
             .getNonProposing(0)
             .getMessageFactory()
-            .createSignedProposalPayload(nextRoundId, reproposedBlock));
+            .createSignedProposalPayload(nextRoundId, reproposedBlock)
+            .getSignedPayload());
 
     peers.verifyMessagesReceived(
         localNodeMessageFactory.createSignedPreparePayload(nextRoundId, reproposedBlock.getHash()));
@@ -189,15 +195,17 @@ public class ReceivedNewRoundTest {
         peers
             .getNonProposing(0)
             .getMessageFactory()
-            .createSignedProposalPayload(nextRoundId, reproposedBlock));
+            .createSignedProposalPayload(nextRoundId, reproposedBlock)
+            .getSignedPayload());
 
     peers.verifyNoMessagesReceived();
 
     nextRoles.getNonProposing(1).injectPrepare(nextRoundId, reproposedBlock.getHash());
 
-    final SignedData<CommitPayload> expectedCommit =
+    final Commit expectedCommit =
+        new Commit(
             TestHelpers.createSignedCommitPayload(
-            nextRoundId, reproposedBlock, context.getLocalNodeParams().getNodeKeyPair());
+                nextRoundId, reproposedBlock, context.getLocalNodeParams().getNodeKeyPair()));
 
     peers.verifyMessagesReceived(expectedCommit);
   }

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/RoundChangeTest.java

@@ -19,11 +19,12 @@ import static tech.pegasys.pantheon.consensus.ibft.support.TestHelpers.createVal
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.IbftHelpers;
 import tech.pegasys.pantheon.consensus.ibft.ibftevent.RoundExpiry;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.NewRound;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.NewRoundPayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangeCertificate;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
@@ -75,7 +76,7 @@ public class RoundChangeTest {
 
     // NOTE: The prepare certificate will be empty as insufficient Prepare msgs have been received.
     final ConsensusRoundIdentifier targetRound = new ConsensusRoundIdentifier(1, 1);
-    final SignedData<RoundChangePayload> expectedTxRoundChange =
+    final RoundChange expectedTxRoundChange =
         localNodeMessageFactory.createSignedRoundChangePayload(targetRound, empty());
     context.getController().handleRoundExpiry(new RoundExpiry(roundId));
     peers.verifyMessagesReceived(expectedTxRoundChange);
@@ -84,7 +85,7 @@ public class RoundChangeTest {
   @Test
   public void roundChangeHasEmptyCertificateIfNoPrepareMessagesReceived() {
     final ConsensusRoundIdentifier targetRound = new ConsensusRoundIdentifier(1, 1);
-    final SignedData<RoundChangePayload> expectedTxRoundChange =
+    final RoundChange expectedTxRoundChange =
         localNodeMessageFactory.createSignedRoundChangePayload(targetRound, empty());
 
     peers.getProposer().injectProposal(roundId, blockToPropose);
@@ -99,7 +100,7 @@ public class RoundChangeTest {
     // Note: There are 4 validators, thus Quorum is 3 and Prepare Msgs are 2 - thus
     // receiving only a single Prepare msg will result in no PreparedCert.
     final ConsensusRoundIdentifier targetRound = new ConsensusRoundIdentifier(1, 1);
-    final SignedData<RoundChangePayload> expectedTxRoundChange =
+    final RoundChange expectedTxRoundChange =
         localNodeMessageFactory.createSignedRoundChangePayload(targetRound, empty());
 
     peers.getProposer().injectProposal(roundId, blockToPropose);
@@ -113,27 +114,28 @@ public class RoundChangeTest {
   @Test
   public void roundChangeHasPopulatedCertificateIfQuorumPrepareMessagesAndProposalAreReceived() {
     final ConsensusRoundIdentifier targetRound = new ConsensusRoundIdentifier(1, 1);
-    final SignedData<PreparePayload> localPrepareMessage =
+    final Prepare localPrepareMessage =
         localNodeMessageFactory.createSignedPreparePayload(roundId, blockToPropose.getHash());
 
-    final SignedData<ProposalPayload> proposal =
+    final Proposal proposal = peers.getProposer().injectProposal(roundId, blockToPropose);
-        peers.getProposer().injectProposal(roundId, blockToPropose);
     peers.clearReceivedMessages();
 
-    final SignedData<PreparePayload> p1 =
+    final Prepare p1 = peers.getNonProposing(0).injectPrepare(roundId, blockToPropose.getHash());
-        peers.getNonProposing(0).injectPrepare(roundId, blockToPropose.getHash());
     peers.clearReceivedMessages();
 
-    final SignedData<PreparePayload> p2 =
+    final Prepare p2 = peers.getNonProposing(1).injectPrepare(roundId, blockToPropose.getHash());
-        peers.getNonProposing(1).injectPrepare(roundId, blockToPropose.getHash());
     peers.clearReceivedMessages();
 
-    final SignedData<RoundChangePayload> expectedTxRoundChange =
+    final RoundChange expectedTxRoundChange =
         localNodeMessageFactory.createSignedRoundChangePayload(
             targetRound,
             Optional.of(
                 new PreparedCertificate(
-                    proposal, Lists.newArrayList(localPrepareMessage, p1, p2))));
+                    proposal.getSignedPayload(),
+                    Lists.newArrayList(
+                        localPrepareMessage.getSignedPayload(),
+                        p1.getSignedPayload(),
+                        p2.getSignedPayload()))));
 
     context.getController().handleRoundExpiry(new RoundExpiry(roundId));
     peers.verifyMessagesReceived(expectedTxRoundChange);
@@ -146,20 +148,23 @@ public class RoundChangeTest {
     final Block locallyProposedBlock =
         context.createBlockForProposalFromChainHead(targetRound.getRoundNumber(), blockTimeStamp);
 
-    final SignedData<RoundChangePayload> rc1 =
+    final RoundChange rc1 = peers.getNonProposing(0).injectRoundChange(targetRound, empty());
-        peers.getNonProposing(0).injectRoundChange(targetRound, empty());
+    final RoundChange rc2 = peers.getNonProposing(1).injectRoundChange(targetRound, empty());
-    final SignedData<RoundChangePayload> rc2 =
+    final RoundChange rc3 = peers.getNonProposing(2).injectRoundChange(targetRound, empty());
-        peers.getNonProposing(1).injectRoundChange(targetRound, empty());
+    final RoundChange rc4 = peers.getProposer().injectRoundChange(targetRound, empty());
-    final SignedData<RoundChangePayload> rc3 =
-        peers.getNonProposing(2).injectRoundChange(targetRound, empty());
-    final SignedData<RoundChangePayload> rc4 =
-        peers.getProposer().injectRoundChange(targetRound, empty());
 
-    final SignedData<NewRoundPayload> expectedNewRound =
+    final NewRound expectedNewRound =
         localNodeMessageFactory.createSignedNewRoundPayload(
             targetRound,
-            new RoundChangeCertificate(Lists.newArrayList(rc1, rc2, rc3, rc4)),
+            new RoundChangeCertificate(
-            localNodeMessageFactory.createSignedProposalPayload(targetRound, locallyProposedBlock));
+                Lists.newArrayList(
+                    rc1.getSignedPayload(),
+                    rc2.getSignedPayload(),
+                    rc3.getSignedPayload(),
+                    rc4.getSignedPayload())),
+            localNodeMessageFactory
+                .createSignedProposalPayload(targetRound, locallyProposedBlock)
+                .getSignedPayload());
 
     peers.verifyMessagesReceived(expectedNewRound);
   }
@@ -182,19 +187,18 @@ public class RoundChangeTest {
 
     final ConsensusRoundIdentifier targetRound = new ConsensusRoundIdentifier(1, 4);
 
-    final SignedData<RoundChangePayload> rc1 =
+    final RoundChange rc1 = peers.getNonProposing(0).injectRoundChange(targetRound, empty());
-        peers.getNonProposing(0).injectRoundChange(targetRound, empty());
 
     // Create a roundChange with a PreparedCertificate from an earlier Round (should not be used
-    final SignedData<RoundChangePayload> rc2 =
+    final RoundChange rc2 =
         peers.getNonProposing(1).injectRoundChange(targetRound, Optional.of(earlierPrepCert));
 
     // Create a roundChange with a PreparedCertificate from an earlier Round (should not be used
-    final SignedData<RoundChangePayload> rc3 =
+    final RoundChange rc3 =
         peers.getNonProposing(2).injectRoundChange(targetRound, Optional.of(earlierPrepCert));
 
     // Create a roundChange containing a PreparedCertificate
-    final SignedData<RoundChangePayload> rc4 =
+    final RoundChange rc4 =
         peers.getProposer().injectRoundChange(targetRound, Optional.of(bestPrepCert));
 
     // Expected to use the block with "ARBITRARY_BLOCKTIME" (i.e. latter block) but with the target
@@ -203,12 +207,18 @@ public class RoundChangeTest {
         context.createBlockForProposalFromChainHead(
             targetRound.getRoundNumber(), ARBITRARY_BLOCKTIME);
 
-    final SignedData<NewRoundPayload> expectedNewRound =
+    final NewRound expectedNewRound =
         localNodeMessageFactory.createSignedNewRoundPayload(
             targetRound,
-            new RoundChangeCertificate(Lists.newArrayList(rc1, rc2, rc3, rc4)),
+            new RoundChangeCertificate(
-            localNodeMessageFactory.createSignedProposalPayload(
+                Lists.newArrayList(
-                targetRound, expectedBlockToPropose));
+                    rc1.getSignedPayload(),
+                    rc2.getSignedPayload(),
+                    rc3.getSignedPayload(),
+                    rc4.getSignedPayload())),
+            localNodeMessageFactory
+                .createSignedProposalPayload(targetRound, expectedBlockToPropose)
+                .getSignedPayload());
 
     peers.verifyMessagesReceived(expectedNewRound);
   }
@@ -226,11 +236,13 @@ public class RoundChangeTest {
     final Block locallyProposedBlock =
         context.createBlockForProposalFromChainHead(futureRound.getRoundNumber(), blockTimeStamp);
 
-    final SignedData<NewRoundPayload> expectedNewRound =
+    final NewRound expectedNewRound =
         localNodeMessageFactory.createSignedNewRoundPayload(
             futureRound,
             new RoundChangeCertificate(roundChangeMessages),
-            localNodeMessageFactory.createSignedProposalPayload(futureRound, locallyProposedBlock));
+            localNodeMessageFactory
+                .createSignedProposalPayload(futureRound, locallyProposedBlock)
+                .getSignedPayload());
 
     peers.verifyMessagesReceived(expectedNewRound);
   }
@@ -264,7 +276,10 @@ public class RoundChangeTest {
     List<SignedData<RoundChangePayload>> roundChangeMessages = Lists.newArrayList();
     // Create a roundChange containing a PreparedCertificate
     roundChangeMessages.add(
-        peers.getProposer().injectRoundChange(targetRound, Optional.of(prepCert)));
+        peers
+            .getProposer()
+            .injectRoundChange(targetRound, Optional.of(prepCert))
+            .getSignedPayload());
 
     // Attempt to override the previously received RoundChange (but now without a payload).
     peers.getProposer().injectRoundChange(targetRound, empty());
@@ -275,12 +290,13 @@ public class RoundChangeTest {
         context.createBlockForProposalFromChainHead(
             targetRound.getRoundNumber(), ARBITRARY_BLOCKTIME);
 
-    final SignedData<NewRoundPayload> expectedNewRound =
+    final NewRound expectedNewRound =
         localNodeMessageFactory.createSignedNewRoundPayload(
             targetRound,
             new RoundChangeCertificate(Lists.newArrayList(roundChangeMessages)),
-            localNodeMessageFactory.createSignedProposalPayload(
+            localNodeMessageFactory
-                targetRound, expectedBlockToPropose));
+                .createSignedProposalPayload(targetRound, expectedBlockToPropose)
+                .getSignedPayload());
 
     peers.verifyMessagesReceived(expectedNewRound);
   }
@@ -312,12 +328,9 @@ public class RoundChangeTest {
   public void illegallyConstructedRoundChangeMessageIsDiscarded() {
     final ConsensusRoundIdentifier targetRound = new ConsensusRoundIdentifier(1, 4);
 
-    final SignedData<RoundChangePayload> rc1 =
+    final RoundChange rc1 = peers.getNonProposing(0).injectRoundChange(targetRound, empty());
-        peers.getNonProposing(0).injectRoundChange(targetRound, empty());
+    final RoundChange rc2 = peers.getNonProposing(1).injectRoundChange(targetRound, empty());
-    final SignedData<RoundChangePayload> rc2 =
+    final RoundChange rc3 = peers.getNonProposing(2).injectRoundChange(targetRound, empty());
-        peers.getNonProposing(1).injectRoundChange(targetRound, empty());
-    final SignedData<RoundChangePayload> rc3 =
-        peers.getNonProposing(2).injectRoundChange(targetRound, empty());
 
     // create illegal RoundChangeMessage
     final PreparedCertificate illegalPreparedCertificate =
@@ -325,7 +338,8 @@ public class RoundChangeTest {
             peers
                 .getNonProposing(0)
                 .getMessageFactory()
-                .createSignedProposalPayload(roundId, blockToPropose),
+                .createSignedProposalPayload(roundId, blockToPropose)
+                .getSignedPayload(),
             emptyList());
 
     peers

consensus/ibft/src/integration-test/java/tech/pegasys/pantheon/consensus/ibft/tests/SpuriousBehaviourTest.java

@@ -17,10 +17,9 @@ import static tech.pegasys.pantheon.consensus.ibft.support.TestHelpers.createSig
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.messagedata.IbftV2;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.support.NodeParams;
 import tech.pegasys.pantheon.consensus.ibft.support.RoundSpecificPeers;
 import tech.pegasys.pantheon.consensus.ibft.support.TestContext;
@@ -63,8 +62,8 @@ public class SpuriousBehaviourTest {
   private final RoundSpecificPeers peers = context.roundSpecificPeers(roundId);
 
   private Block proposedBlock = context.createBlockForProposalFromChainHead(0, 30);
-  private SignedData<PreparePayload> expectedPrepare;
+  private Prepare expectedPrepare;
-  private SignedData<CommitPayload> expectedCommit;
+  private Commit expectedCommit;
 
   @Before
   public void setup() {
@@ -75,8 +74,9 @@ public class SpuriousBehaviourTest {
             .getLocalNodeMessageFactory()
             .createSignedPreparePayload(roundId, proposedBlock.getHash());
     expectedCommit =
+        new Commit(
             createSignedCommitPayload(
-            roundId, proposedBlock, context.getLocalNodeParams().getNodeKeyPair());
+                roundId, proposedBlock, context.getLocalNodeParams().getNodeKeyPair()));
   }
 
   @Test

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/messagewrappers/NewRound.java

@@ -13,6 +13,8 @@
 package tech.pegasys.pantheon.consensus.ibft.messagewrappers;
 
 import tech.pegasys.pantheon.consensus.ibft.payload.NewRoundPayload;
+import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
+import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangeCertificate;
 import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 
 public class NewRound extends IbftMessage<NewRoundPayload> {
@@ -20,4 +22,12 @@ public class NewRound extends IbftMessage<NewRoundPayload> {
   public NewRound(final SignedData<NewRoundPayload> payload) {
     super(payload);
   }
+
+  public RoundChangeCertificate getRoundChangeCertificate() {
+    return getSignedPayload().getPayload().getRoundChangeCertificate();
+  }
+
+  public SignedData<ProposalPayload> getProposalPayload() {
+    return getSignedPayload().getPayload().getProposalPayload();
+  }
 }

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/network/IbftMessageTransmitter.java

@@ -46,8 +46,7 @@ public class IbftMessageTransmitter {
   }
 
   public void multicastProposal(final ConsensusRoundIdentifier roundIdentifier, final Block block) {
-    final Proposal data =
+    final Proposal data = messageFactory.createSignedProposalPayload(roundIdentifier, block);
-        new Proposal(messageFactory.createSignedProposalPayload(roundIdentifier, block));
 
     final ProposalMessageData message = ProposalMessageData.create(data);
 
@@ -55,8 +54,7 @@ public class IbftMessageTransmitter {
   }
 
   public void multicastPrepare(final ConsensusRoundIdentifier roundIdentifier, final Hash digest) {
-    final Prepare data =
+    final Prepare data = messageFactory.createSignedPreparePayload(roundIdentifier, digest);
-        new Prepare(messageFactory.createSignedPreparePayload(roundIdentifier, digest));
 
     final PrepareMessageData message = PrepareMessageData.create(data);
 
@@ -68,7 +66,7 @@ public class IbftMessageTransmitter {
       final Hash digest,
       final Signature commitSeal) {
     final Commit data =
-        new Commit(messageFactory.createSignedCommitPayload(roundIdentifier, digest, commitSeal));
+        messageFactory.createSignedCommitPayload(roundIdentifier, digest, commitSeal);
 
     final CommitMessageData message = CommitMessageData.create(data);
 
@@ -80,8 +78,7 @@ public class IbftMessageTransmitter {
       final Optional<PreparedCertificate> preparedCertificate) {
 
     final RoundChange data =
-        new RoundChange(
+        messageFactory.createSignedRoundChangePayload(roundIdentifier, preparedCertificate);
-            messageFactory.createSignedRoundChangePayload(roundIdentifier, preparedCertificate));
 
     final RoundChangeMessageData message = RoundChangeMessageData.create(data);
 
@@ -94,9 +91,8 @@ public class IbftMessageTransmitter {
       final SignedData<ProposalPayload> proposalPayload) {
 
     final NewRound signedPayload =
-        new NewRound(
         messageFactory.createSignedNewRoundPayload(
-                roundIdentifier, roundChangeCertificate, proposalPayload));
+            roundIdentifier, roundChangeCertificate, proposalPayload);
 
     final NewRoundMessageData message = NewRoundMessageData.create(signedPayload);
 

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/payload/MessageFactory.java

@@ -13,6 +13,11 @@
 package tech.pegasys.pantheon.consensus.ibft.payload;
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.NewRound;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
 import tech.pegasys.pantheon.crypto.SECP256K1;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.crypto.SECP256K1.Signature;
@@ -31,42 +36,42 @@ public class MessageFactory {
     this.validatorKeyPair = validatorKeyPair;
   }
 
-  public SignedData<ProposalPayload> createSignedProposalPayload(
+  public Proposal createSignedProposalPayload(
       final ConsensusRoundIdentifier roundIdentifier, final Block block) {
 
     final ProposalPayload payload = new ProposalPayload(roundIdentifier, block);
 
-    return createSignedMessage(payload);
+    return new Proposal(createSignedMessage(payload));
   }
 
-  public SignedData<PreparePayload> createSignedPreparePayload(
+  public Prepare createSignedPreparePayload(
       final ConsensusRoundIdentifier roundIdentifier, final Hash digest) {
 
     final PreparePayload payload = new PreparePayload(roundIdentifier, digest);
 
-    return createSignedMessage(payload);
+    return new Prepare(createSignedMessage(payload));
   }
 
-  public SignedData<CommitPayload> createSignedCommitPayload(
+  public Commit createSignedCommitPayload(
       final ConsensusRoundIdentifier roundIdentifier,
       final Hash digest,
       final Signature commitSeal) {
 
     final CommitPayload payload = new CommitPayload(roundIdentifier, digest, commitSeal);
 
-    return createSignedMessage(payload);
+    return new Commit(createSignedMessage(payload));
   }
 
-  public SignedData<RoundChangePayload> createSignedRoundChangePayload(
+  public RoundChange createSignedRoundChangePayload(
       final ConsensusRoundIdentifier roundIdentifier,
       final Optional<PreparedCertificate> preparedCertificate) {
 
     final RoundChangePayload payload = new RoundChangePayload(roundIdentifier, preparedCertificate);
 
-    return createSignedMessage(payload);
+    return new RoundChange(createSignedMessage(payload));
   }
 
-  public SignedData<NewRoundPayload> createSignedNewRoundPayload(
+  public NewRound createSignedNewRoundPayload(
       final ConsensusRoundIdentifier roundIdentifier,
       final RoundChangeCertificate roundChangeCertificate,
       final SignedData<ProposalPayload> proposalPayload) {
@@ -74,7 +79,7 @@ public class MessageFactory {
     final NewRoundPayload payload =
         new NewRoundPayload(roundIdentifier, roundChangeCertificate, proposalPayload);
 
-    return createSignedMessage(payload);
+    return new NewRound(createSignedMessage(payload));
   }
 
   private <M extends Payload> SignedData<M> createSignedMessage(final M payload) {

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/payload/NewRoundPayload.java

@@ -14,6 +14,7 @@ package tech.pegasys.pantheon.consensus.ibft.payload;
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.messagedata.IbftV2;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.NewRound;
 import tech.pegasys.pantheon.ethereum.rlp.RLPInput;
 import tech.pegasys.pantheon.ethereum.rlp.RLPOutput;
 
@@ -122,9 +123,11 @@ public class NewRoundPayload implements Payload {
       this.proposalPayload = proposalPayload;
     }
 
-    public static Builder fromExisting(final NewRoundPayload payload) {
+    public static Builder fromExisting(final NewRound payload) {
       return new Builder(
-          payload.roundChangeIdentifier, payload.roundChangeCertificate, payload.proposalPayload);
+          payload.getRoundIdentifier(),
+          payload.getRoundChangeCertificate(),
+          payload.getProposalPayload());
     }
 
     public void setRoundChangeIdentifier(final ConsensusRoundIdentifier roundChangeIdentifier) {

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/payload/RoundChangeCertificate.java

@@ -12,6 +12,7 @@
  */
 package tech.pegasys.pantheon.consensus.ibft.payload;
 
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
 import tech.pegasys.pantheon.ethereum.rlp.RLPInput;
 import tech.pegasys.pantheon.ethereum.rlp.RLPOutput;
 
@@ -20,10 +21,12 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
 import java.util.StringJoiner;
+import java.util.stream.Collectors;
 
 import com.google.common.collect.Lists;
 
 public class RoundChangeCertificate {
+
   private final Collection<SignedData<RoundChangePayload>> roundChangePayloads;
 
   public RoundChangeCertificate(
@@ -52,16 +55,21 @@ public class RoundChangeCertificate {
   }
 
   public static class Builder {
-    private final List<SignedData<RoundChangePayload>> roundChangePayloads = Lists.newArrayList();
+
+    private final List<RoundChange> roundChangePayloads = Lists.newArrayList();
 
     public Builder() {}
 
-    public void appendRoundChangeMessage(final SignedData<RoundChangePayload> msg) {
+    public void appendRoundChangeMessage(final RoundChange msg) {
       roundChangePayloads.add(msg);
     }
 
     public RoundChangeCertificate buildCertificate() {
-      return new RoundChangeCertificate(roundChangePayloads);
+      return new RoundChangeCertificate(
+          roundChangePayloads
+              .stream()
+              .map(RoundChange::getSignedPayload)
+              .collect(Collectors.toList()));
     }
   }
 

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/statemachine/IbftBlockHeightManager.java

@@ -144,9 +144,8 @@ public class IbftBlockHeightManager implements BlockHeightManager {
     startNewRound(currentRound.getRoundIdentifier().getRoundNumber() + 1);
 
     final RoundChange localRoundChange =
-        new RoundChange(
         messageFactory.createSignedRoundChangePayload(
-                currentRound.getRoundIdentifier(), latestPreparedCertificate));
+            currentRound.getRoundIdentifier(), latestPreparedCertificate);
     transmitter.multicastRoundChange(currentRound.getRoundIdentifier(), latestPreparedCertificate);
 
     // Its possible the locally created RoundChange triggers the transmission of a NewRound

consensus/ibft/src/main/java/tech/pegasys/pantheon/consensus/ibft/statemachine/IbftRound.java

@@ -93,8 +93,7 @@ public class IbftRound {
     transmitter.multicastProposal(roundState.getRoundIdentifier(), block);
 
     updateStateWithProposedBlock(
-        new Proposal(
+        messageFactory.createSignedProposalPayload(roundState.getRoundIdentifier(), block));
-            messageFactory.createSignedProposalPayload(roundState.getRoundIdentifier(), block)));
   }
 
   public void startRoundWith(
@@ -106,8 +105,7 @@ public class IbftRound {
     if (!latestCertificate.isPresent()) {
       LOG.trace("Multicasting NewRound with new block. round={}", roundState.getRoundIdentifier());
       final Block block = blockCreator.createBlock(headerTimestamp);
-      proposal =
+      proposal = messageFactory.createSignedProposalPayload(getRoundIdentifier(), block);
-          new Proposal(messageFactory.createSignedProposalPayload(getRoundIdentifier(), block));
     } else {
       LOG.trace(
           "Multicasting NewRound from PreparedCertificate. round={}",
@@ -145,7 +143,7 @@ public class IbftRound {
         "Created proposal from prepared certificate blockHeader={} extraData={}",
         block.getHeader(),
         extraDataToPublish);
-    return new Proposal(messageFactory.createSignedProposalPayload(getRoundIdentifier(), newBlock));
+    return messageFactory.createSignedProposalPayload(getRoundIdentifier(), newBlock);
   }
 
   public void handleProposalMessage(final Proposal msg) {
@@ -175,9 +173,8 @@ public class IbftRound {
       LOG.info("Sending prepare message.");
       transmitter.multicastPrepare(getRoundIdentifier(), block.getHash());
       final Prepare localPrepareMessage =
-          new Prepare(
           messageFactory.createSignedPreparePayload(
-                  roundState.getRoundIdentifier(), block.getHash()));
+              roundState.getRoundIdentifier(), block.getHash());
       peerIsPrepared(localPrepareMessage);
     }
   }
@@ -212,11 +209,10 @@ public class IbftRound {
       }
 
       final Commit localCommitMessage =
-          new Commit(
           messageFactory.createSignedCommitPayload(
               roundState.getRoundIdentifier(),
               msg.getSignedPayload().getPayload().getBlock().getHash(),
-                  createCommitSeal(roundState.getProposedBlock().get())));
+              createCommitSeal(roundState.getProposedBlock().get()));
       peerIsCommitted(localCommitMessage);
     }
 

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/IbftHelpersTest.java

@@ -17,10 +17,9 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 import static tech.pegasys.pantheon.consensus.ibft.IbftHelpers.calculateRequiredValidatorQuorum;
 
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.ethereum.core.Block;
 import tech.pegasys.pantheon.ethereum.core.Hash;
@@ -90,42 +89,48 @@ public class IbftHelpersTest {
     final ConsensusRoundIdentifier roundIdentifier = new ConsensusRoundIdentifier(1, 4);
 
     final ConsensusRoundIdentifier preparedRound = TestHelpers.createFrom(roundIdentifier, 0, -1);
-    final SignedData<ProposalPayload> differentProposal =
+    final Proposal differentProposal =
         proposerMessageFactory.createSignedProposalPayload(preparedRound, proposedBlock);
 
     final Optional<PreparedCertificate> latterPreparedCert =
         Optional.of(
             new PreparedCertificate(
-                differentProposal,
+                differentProposal.getSignedPayload(),
                 Lists.newArrayList(
-                    proposerMessageFactory.createSignedPreparePayload(
+                    proposerMessageFactory
-                        roundIdentifier, proposedBlock.getHash()),
+                        .createSignedPreparePayload(roundIdentifier, proposedBlock.getHash())
-                    proposerMessageFactory.createSignedPreparePayload(
+                        .getSignedPayload(),
-                        roundIdentifier, proposedBlock.getHash()))));
+                    proposerMessageFactory
+                        .createSignedPreparePayload(roundIdentifier, proposedBlock.getHash())
+                        .getSignedPayload())));
 
     // An earlier PrepareCert is added to ensure the path to find the latest PrepareCert
     // is correctly followed.
     final ConsensusRoundIdentifier earlierPreparedRound =
         TestHelpers.createFrom(roundIdentifier, 0, -2);
-    final SignedData<ProposalPayload> earlierProposal =
+    final Proposal earlierProposal =
         proposerMessageFactory.createSignedProposalPayload(earlierPreparedRound, proposedBlock);
     final Optional<PreparedCertificate> earlierPreparedCert =
         Optional.of(
             new PreparedCertificate(
-                earlierProposal,
+                earlierProposal.getSignedPayload(),
                 Lists.newArrayList(
-                    proposerMessageFactory.createSignedPreparePayload(
+                    proposerMessageFactory
-                        earlierPreparedRound, proposedBlock.getHash()),
+                        .createSignedPreparePayload(earlierPreparedRound, proposedBlock.getHash())
-                    proposerMessageFactory.createSignedPreparePayload(
+                        .getSignedPayload(),
-                        earlierPreparedRound, proposedBlock.getHash()))));
+                    proposerMessageFactory
+                        .createSignedPreparePayload(earlierPreparedRound, proposedBlock.getHash())
+                        .getSignedPayload())));
 
     final Optional<PreparedCertificate> newestCert =
         IbftHelpers.findLatestPreparedCertificate(
             Lists.newArrayList(
-                proposerMessageFactory.createSignedRoundChangePayload(
+                proposerMessageFactory
-                    roundIdentifier, earlierPreparedCert),
+                    .createSignedRoundChangePayload(roundIdentifier, earlierPreparedCert)
-                proposerMessageFactory.createSignedRoundChangePayload(
+                    .getSignedPayload(),
-                    roundIdentifier, latterPreparedCert)));
+                proposerMessageFactory
+                    .createSignedRoundChangePayload(roundIdentifier, latterPreparedCert)
+                    .getSignedPayload()));
 
     assertThat(newestCert).isEqualTo(latterPreparedCert);
   }
@@ -139,10 +144,12 @@ public class IbftHelpersTest {
     final Optional<PreparedCertificate> newestCert =
         IbftHelpers.findLatestPreparedCertificate(
             Lists.newArrayList(
-                proposerMessageFactory.createSignedRoundChangePayload(
+                proposerMessageFactory
-                    roundIdentifier, Optional.empty()),
+                    .createSignedRoundChangePayload(roundIdentifier, Optional.empty())
-                proposerMessageFactory.createSignedRoundChangePayload(
+                    .getSignedPayload(),
-                    roundIdentifier, Optional.empty())));
+                proposerMessageFactory
+                    .createSignedRoundChangePayload(roundIdentifier, Optional.empty())
+                    .getSignedPayload()));
 
     assertThat(newestCert).isEmpty();
   }

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/TestHelpers.java

@@ -72,34 +72,32 @@ public class TestHelpers {
         new ConsensusRoundIdentifier(0x1234567890ABCDEFL, round);
     final Block block =
         TestHelpers.createProposalBlock(singletonList(AddressHelpers.ofValue(1)), 0);
-    return new Proposal(messageFactory.createSignedProposalPayload(roundIdentifier, block));
+    return messageFactory.createSignedProposalPayload(roundIdentifier, block);
   }
 
   public static Prepare createSignedPreparePayload(final KeyPair signerKeys) {
     final MessageFactory messageFactory = new MessageFactory(signerKeys);
     final ConsensusRoundIdentifier roundIdentifier =
         new ConsensusRoundIdentifier(0x1234567890ABCDEFL, 0xFEDCBA98);
-    return new Prepare(
+    return messageFactory.createSignedPreparePayload(
-        messageFactory.createSignedPreparePayload(roundIdentifier, Hash.fromHexStringLenient("0")));
+        roundIdentifier, Hash.fromHexStringLenient("0"));
   }
 
   public static Commit createSignedCommitPayload(final KeyPair signerKeys) {
     final MessageFactory messageFactory = new MessageFactory(signerKeys);
     final ConsensusRoundIdentifier roundIdentifier =
         new ConsensusRoundIdentifier(0x1234567890ABCDEFL, 0xFEDCBA98);
-    return new Commit(
+    return messageFactory.createSignedCommitPayload(
-        messageFactory.createSignedCommitPayload(
         roundIdentifier,
         Hash.fromHexStringLenient("0"),
-            Signature.create(BigInteger.ONE, BigInteger.TEN, (byte) 0)));
+        Signature.create(BigInteger.ONE, BigInteger.TEN, (byte) 0));
   }
 
   public static RoundChange createSignedRoundChangePayload(final KeyPair signerKeys) {
     final MessageFactory messageFactory = new MessageFactory(signerKeys);
     final ConsensusRoundIdentifier roundIdentifier =
         new ConsensusRoundIdentifier(0x1234567890ABCDEFL, 0xFEDCBA98);
-    return new RoundChange(
+    return messageFactory.createSignedRoundChangePayload(roundIdentifier, Optional.empty());
-        messageFactory.createSignedRoundChangePayload(roundIdentifier, Optional.empty()));
   }
 
   public static NewRound createSignedNewRoundPayload(final KeyPair signerKeys) {
@@ -107,10 +105,9 @@ public class TestHelpers {
     final ConsensusRoundIdentifier roundIdentifier =
         new ConsensusRoundIdentifier(0x1234567890ABCDEFL, 0xFEDCBA98);
     final Proposal proposalPayload = createSignedProposalPayload(signerKeys);
-    return new NewRound(
+    return messageFactory.createSignedNewRoundPayload(
-        messageFactory.createSignedNewRoundPayload(
         roundIdentifier,
         new RoundChangeCertificate(newArrayList()),
-            proposalPayload.getSignedPayload()));
+        proposalPayload.getSignedPayload());
   }
 }

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/statemachine/IbftBlockHeightManagerTest.java

@@ -217,8 +217,7 @@ public class IbftBlockHeightManagerTest {
   public void onRoundChangeReceptionRoundChangeManagerIsInvokedAndNewRoundStarted() {
     final ConsensusRoundIdentifier futureRoundIdentifier = createFrom(roundIdentifier, 0, +2);
     final RoundChange roundChange =
-        new RoundChange(
+        messageFactory.createSignedRoundChangePayload(futureRoundIdentifier, Optional.empty());
-            messageFactory.createSignedRoundChangePayload(futureRoundIdentifier, Optional.empty()));
     when(roundChangeManager.appendRoundChangeMessage(any()))
         .thenReturn(
             Optional.of(new RoundChangeCertificate(singletonList(roundChange.getSignedPayload()))));
@@ -263,8 +262,7 @@ public class IbftBlockHeightManagerTest {
   public void whenSufficientRoundChangesAreReceivedANewRoundMessageIsTransmitted() {
     final ConsensusRoundIdentifier futureRoundIdentifier = createFrom(roundIdentifier, 0, +2);
     final RoundChange roundChange =
-        new RoundChange(
+        messageFactory.createSignedRoundChangePayload(futureRoundIdentifier, Optional.empty());
-            messageFactory.createSignedRoundChangePayload(futureRoundIdentifier, Optional.empty()));
     final RoundChangeCertificate roundChangCert =
         new RoundChangeCertificate(singletonList(roundChange.getSignedPayload()));
 
@@ -303,29 +301,28 @@ public class IbftBlockHeightManagerTest {
     manager.start();
 
     final Prepare prepare =
-        new Prepare(
         validatorMessageFactory
             .get(0)
-                .createSignedPreparePayload(futureRoundIdentifier, Hash.fromHexStringLenient("0")));
+            .createSignedPreparePayload(futureRoundIdentifier, Hash.fromHexStringLenient("0"));
     final Commit commit =
-        new Commit(
         validatorMessageFactory
             .get(1)
             .createSignedCommitPayload(
                 futureRoundIdentifier,
                 Hash.fromHexStringLenient("0"),
-                    Signature.create(BigInteger.ONE, BigInteger.ONE, (byte) 1)));
+                Signature.create(BigInteger.ONE, BigInteger.ONE, (byte) 1));
 
     manager.handlePreparePayload(prepare);
     manager.handleCommitPayload(commit);
 
     // Force a new round to be started at new round number.
     final NewRound newRound =
-        new NewRound(
         messageFactory.createSignedNewRoundPayload(
             futureRoundIdentifier,
             new RoundChangeCertificate(Collections.emptyList()),
-                messageFactory.createSignedProposalPayload(futureRoundIdentifier, createdBlock)));
+            messageFactory
+                .createSignedProposalPayload(futureRoundIdentifier, createdBlock)
+                .getSignedPayload());
 
     manager.handleNewRoundPayload(newRound);
 
@@ -348,15 +345,13 @@ public class IbftBlockHeightManagerTest {
     manager.handleBlockTimerExpiry(roundIdentifier); // Trigger a Proposal creation.
 
     final Prepare firstPrepare =
-        new Prepare(
         validatorMessageFactory
             .get(0)
-                .createSignedPreparePayload(roundIdentifier, Hash.fromHexStringLenient("0")));
+            .createSignedPreparePayload(roundIdentifier, Hash.fromHexStringLenient("0"));
     final Prepare secondPrepare =
-        new Prepare(
         validatorMessageFactory
             .get(1)
-                .createSignedPreparePayload(roundIdentifier, Hash.fromHexStringLenient("0")));
+            .createSignedPreparePayload(roundIdentifier, Hash.fromHexStringLenient("0"));
     manager.handlePreparePayload(firstPrepare);
     manager.handlePreparePayload(secondPrepare);
 

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/statemachine/IbftRoundTest.java

@@ -28,9 +28,6 @@ import tech.pegasys.pantheon.consensus.ibft.IbftBlockHashing;
 import tech.pegasys.pantheon.consensus.ibft.IbftContext;
 import tech.pegasys.pantheon.consensus.ibft.IbftExtraData;
 import tech.pegasys.pantheon.consensus.ibft.blockcreation.IbftBlockCreator;
-import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
-import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
-import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.network.IbftMessageTransmitter;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
@@ -140,7 +137,7 @@ public class IbftRoundTest {
             transmitter);
 
     round.handleProposalMessage(
-        new Proposal(messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock)));
+        messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock));
     verify(transmitter, times(1)).multicastPrepare(roundIdentifier, proposedBlock.getHash());
     verify(transmitter, never()).multicastCommit(any(), any(), any());
   }
@@ -206,7 +203,7 @@ public class IbftRoundTest {
 
     // Receive Proposal Message
     round.handleProposalMessage(
-        new Proposal(messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock)));
+        messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock));
     verify(transmitter, times(1)).multicastPrepare(roundIdentifier, proposedBlock.getHash());
     verify(transmitter, times(1))
         .multicastCommit(roundIdentifier, proposedBlock.getHash(), localCommitSeal);
@@ -215,9 +212,8 @@ public class IbftRoundTest {
     // Receive Commit Message
 
     round.handleCommitMessage(
-        new Commit(
         messageFactory.createSignedCommitPayload(
-                roundIdentifier, proposedBlock.getHash(), remoteCommitSeal)));
+            roundIdentifier, proposedBlock.getHash(), remoteCommitSeal));
 
     // Should import block when both commit seals are available.
     ArgumentCaptor<Block> capturedBlock = ArgumentCaptor.forClass(Block.class);
@@ -253,17 +249,15 @@ public class IbftRoundTest {
     verify(blockImporter, never()).importBlock(any(), any(), any());
 
     round.handlePrepareMessage(
-        new Prepare(
+        messageFactory.createSignedPreparePayload(roundIdentifier, proposedBlock.getHash()));
-            messageFactory.createSignedPreparePayload(roundIdentifier, proposedBlock.getHash())));
 
     verify(transmitter, times(1))
         .multicastCommit(roundIdentifier, proposedBlock.getHash(), localCommitSeal);
     verify(blockImporter, never()).importBlock(any(), any(), any());
 
     round.handleCommitMessage(
-        new Commit(
         messageFactory.createSignedCommitPayload(
-                roundIdentifier, proposedBlock.getHash(), remoteCommitSeal)));
+            roundIdentifier, proposedBlock.getHash(), remoteCommitSeal));
     verify(blockImporter, times(1)).importBlock(any(), any(), any());
   }
 
@@ -307,15 +301,17 @@ public class IbftRoundTest {
     final RoundChangeCertificate roundChangeCertificate =
         new RoundChangeCertificate(
             Collections.singletonList(
-                messageFactory.createSignedRoundChangePayload(
+                messageFactory
+                    .createSignedRoundChangePayload(
                         roundIdentifier,
                         Optional.of(
                             new PreparedCertificate(
-                            messageFactory.createSignedProposalPayload(
+                                messageFactory
-                                priorRoundChange, proposedBlock),
+                                    .createSignedProposalPayload(priorRoundChange, proposedBlock)
-                            Collections
+                                    .getSignedPayload(),
-                                .emptyList()))))); // NOTE: IbftRound assumes the prepare's are
+                                Collections.emptyList())))
-    // valid
+                    .getSignedPayload()));
+    // NOTE: IbftRound assumes the prepare's are valid
 
     round.startRoundWith(roundChangeCertificate, 15);
     verify(transmitter, times(1))
@@ -330,8 +326,7 @@ public class IbftRoundTest {
     // Inject a single Prepare message, and confirm the roundState has gone to Prepared (which
     // indicates the block has entered the roundState (note: all msgs are deemed valid due to mocks)
     round.handlePrepareMessage(
-        new Prepare(
+        messageFactory.createSignedPreparePayload(roundIdentifier, proposedBlock.getHash()));
-            messageFactory.createSignedPreparePayload(roundIdentifier, proposedBlock.getHash())));
     assertThat(roundState.isPrepared()).isTrue();
   }
 
@@ -352,7 +347,9 @@ public class IbftRoundTest {
     final RoundChangeCertificate roundChangeCertificate =
         new RoundChangeCertificate(
             Collections.singletonList(
-                messageFactory.createSignedRoundChangePayload(roundIdentifier, Optional.empty())));
+                messageFactory
+                    .createSignedRoundChangePayload(roundIdentifier, Optional.empty())
+                    .getSignedPayload()));
 
     round.startRoundWith(roundChangeCertificate, 15);
     verify(transmitter, times(1))
@@ -362,8 +359,7 @@ public class IbftRoundTest {
     // Inject a single Prepare message, and confirm the roundState has gone to Prepared (which
     // indicates the block has entered the roundState (note: all msgs are deemed valid due to mocks)
     round.handlePrepareMessage(
-        new Prepare(
+        messageFactory.createSignedPreparePayload(roundIdentifier, proposedBlock.getHash()));
-            messageFactory.createSignedPreparePayload(roundIdentifier, proposedBlock.getHash())));
     assertThat(roundState.isPrepared()).isTrue();
   }
 
@@ -401,12 +397,11 @@ public class IbftRoundTest {
             transmitter);
 
     round.handleCommitMessage(
-        new Commit(
         messageFactory.createSignedCommitPayload(
-                roundIdentifier, proposedBlock.getHash(), remoteCommitSeal)));
+            roundIdentifier, proposedBlock.getHash(), remoteCommitSeal));
 
     round.handleProposalMessage(
-        new Proposal(messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock)));
+        messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock));
 
     verify(blockImporter, times(1)).importBlock(any(), any(), any());
   }
@@ -427,12 +422,11 @@ public class IbftRoundTest {
             transmitter);
 
     round.handleCommitMessage(
-        new Commit(
         messageFactory.createSignedCommitPayload(
-                roundIdentifier, proposedBlock.getHash(), remoteCommitSeal)));
+            roundIdentifier, proposedBlock.getHash(), remoteCommitSeal));
 
     round.handleProposalMessage(
-        new Proposal(messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock)));
+        messageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock));
 
     verify(blockImporter, times(1)).importBlock(any(), any(), any());
   }

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/statemachine/RoundChangeManagerTest.java

@@ -21,11 +21,11 @@ import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.IbftContext;
 import tech.pegasys.pantheon.consensus.ibft.IbftHelpers;
 import tech.pegasys.pantheon.consensus.ibft.TestHelpers;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.validation.MessageValidator;
 import tech.pegasys.pantheon.consensus.ibft.validation.RoundChangeMessageValidator;
@@ -129,7 +129,7 @@ public class RoundChangeManagerTest {
   private RoundChange makeRoundChangeMessage(
       final KeyPair key, final ConsensusRoundIdentifier round) {
     MessageFactory messageFactory = new MessageFactory(key);
-    return new RoundChange(messageFactory.createSignedRoundChangePayload(round, Optional.empty()));
+    return messageFactory.createSignedRoundChangePayload(round, Optional.empty());
   }
 
   private RoundChange makeRoundChangeMessageWithPreparedCert(
@@ -143,8 +143,7 @@ public class RoundChangeManagerTest {
     final ConsensusRoundIdentifier proposalRound = TestHelpers.createFrom(round, 0, -1);
     final Block block = TestHelpers.createProposalBlock(validators, proposalRound.getRoundNumber());
     // Proposal must come from an earlier round.
-    final SignedData<ProposalPayload> proposal =
+    final Proposal proposal = messageFactory.createSignedProposalPayload(proposalRound, block);
-        messageFactory.createSignedProposalPayload(proposalRound, block);
 
     final List<SignedData<PreparePayload>> preparePayloads =
         prepareProviders
@@ -152,13 +151,16 @@ public class RoundChangeManagerTest {
             .map(
                 k -> {
                   final MessageFactory prepareFactory = new MessageFactory(k);
-                  return prepareFactory.createSignedPreparePayload(proposalRound, block.getHash());
+                  return prepareFactory
+                      .createSignedPreparePayload(proposalRound, block.getHash())
+                      .getSignedPayload();
                 })
             .collect(Collectors.toList());
 
-    final PreparedCertificate cert = new PreparedCertificate(proposal, preparePayloads);
+    final PreparedCertificate cert =
+        new PreparedCertificate(proposal.getSignedPayload(), preparePayloads);
 
-    return new RoundChange(messageFactory.createSignedRoundChangePayload(round, Optional.of(cert)));
+    return messageFactory.createSignedRoundChangePayload(round, Optional.of(cert));
   }
 
   @Test

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/statemachine/RoundStateTest.java

@@ -23,8 +23,6 @@ import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
 import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
 import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.validation.MessageValidator;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.crypto.SECP256K1.Signature;
@@ -82,8 +80,7 @@ public class RoundStateTest {
     final RoundState roundState = new RoundState(roundIdentifier, 1, messageValidator);
 
     final Proposal proposal =
-        new Proposal(
+        validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block);
-            validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block));
 
     assertThat(roundState.setProposedBlock(proposal)).isFalse();
     assertThat(roundState.isPrepared()).isFalse();
@@ -97,8 +94,7 @@ public class RoundStateTest {
     final RoundState roundState = new RoundState(roundIdentifier, 1, messageValidator);
 
     final Proposal proposal =
-        new Proposal(
+        validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block);
-            validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block));
 
     assertThat(roundState.setProposedBlock(proposal)).isTrue();
     assertThat(roundState.isPrepared()).isTrue();
@@ -116,21 +112,19 @@ public class RoundStateTest {
     final RoundState roundState = new RoundState(roundIdentifier, 1, messageValidator);
 
     final Proposal proposal =
-        new Proposal(
+        validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block);
-            validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block));
 
     assertThat(roundState.setProposedBlock(proposal)).isTrue();
     assertThat(roundState.isPrepared()).isTrue();
     assertThat(roundState.isCommitted()).isFalse();
 
     final Commit commit =
-        new Commit(
         validatorMessageFactories
             .get(0)
             .createSignedCommitPayload(
                 roundIdentifier,
                 block.getHash(),
-                    Signature.create(BigInteger.ONE, BigInteger.ONE, (byte) 1)));
+                Signature.create(BigInteger.ONE, BigInteger.ONE, (byte) 1));
 
     roundState.addCommitMessage(commit);
     assertThat(roundState.isPrepared()).isTrue();
@@ -146,16 +140,14 @@ public class RoundStateTest {
     final RoundState roundState = new RoundState(roundIdentifier, 3, messageValidator);
 
     final Prepare firstPrepare =
-        new Prepare(
         validatorMessageFactories
             .get(1)
-                .createSignedPreparePayload(roundIdentifier, block.getHash()));
+            .createSignedPreparePayload(roundIdentifier, block.getHash());
 
     final Prepare secondPrepare =
-        new Prepare(
         validatorMessageFactories
             .get(2)
-                .createSignedPreparePayload(roundIdentifier, block.getHash()));
+            .createSignedPreparePayload(roundIdentifier, block.getHash());
 
     roundState.addPrepareMessage(firstPrepare);
     assertThat(roundState.isPrepared()).isFalse();
@@ -168,8 +160,7 @@ public class RoundStateTest {
     assertThat(roundState.constructPreparedCertificate()).isEmpty();
 
     final Proposal proposal =
-        new Proposal(
+        validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block);
-            validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block));
     assertThat(roundState.setProposedBlock(proposal)).isTrue();
     assertThat(roundState.isPrepared()).isTrue();
     assertThat(roundState.isCommitted()).isFalse();
@@ -178,12 +169,12 @@ public class RoundStateTest {
 
   @Test
   public void invalidPriorPrepareMessagesAreDiscardedUponSubsequentProposal() {
-    final SignedData<PreparePayload> firstPrepare =
+    final Prepare firstPrepare =
         validatorMessageFactories
             .get(1)
             .createSignedPreparePayload(roundIdentifier, block.getHash());
 
-    final SignedData<PreparePayload> secondPrepare =
+    final Prepare secondPrepare =
         validatorMessageFactories
             .get(2)
             .createSignedPreparePayload(roundIdentifier, block.getHash());
@@ -193,16 +184,16 @@ public class RoundStateTest {
     final RoundState roundState = new RoundState(roundIdentifier, 3, messageValidator);
 
     when(messageValidator.addSignedProposalPayload(any())).thenReturn(true);
-    when(messageValidator.validatePrepareMessage(firstPrepare)).thenReturn(true);
+    when(messageValidator.validatePrepareMessage(firstPrepare.getSignedPayload())).thenReturn(true);
-    when(messageValidator.validatePrepareMessage(secondPrepare)).thenReturn(false);
+    when(messageValidator.validatePrepareMessage(secondPrepare.getSignedPayload()))
+        .thenReturn(false);
 
-    roundState.addPrepareMessage(new Prepare(firstPrepare));
+    roundState.addPrepareMessage(firstPrepare);
-    roundState.addPrepareMessage(new Prepare(secondPrepare));
+    roundState.addPrepareMessage(secondPrepare);
     verify(messageValidator, never()).validatePrepareMessage(any());
 
     final Proposal proposal =
-        new Proposal(
+        validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block);
-            validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block));
 
     assertThat(roundState.setProposedBlock(proposal)).isTrue();
     assertThat(roundState.isPrepared()).isFalse();
@@ -214,31 +205,32 @@ public class RoundStateTest {
   public void prepareMessageIsValidatedAgainstExitingProposal() {
     final RoundState roundState = new RoundState(roundIdentifier, 2, messageValidator);
 
-    final SignedData<PreparePayload> firstPrepare =
+    final Prepare firstPrepare =
         validatorMessageFactories
             .get(1)
             .createSignedPreparePayload(roundIdentifier, block.getHash());
 
-    final SignedData<PreparePayload> secondPrepare =
+    final Prepare secondPrepare =
         validatorMessageFactories
             .get(2)
             .createSignedPreparePayload(roundIdentifier, block.getHash());
 
     final Proposal proposal =
-        new Proposal(
+        validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block);
-            validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block));
 
     when(messageValidator.addSignedProposalPayload(any())).thenReturn(true);
-    when(messageValidator.validatePrepareMessage(firstPrepare)).thenReturn(false);
+    when(messageValidator.validatePrepareMessage(firstPrepare.getSignedPayload()))
-    when(messageValidator.validatePrepareMessage(secondPrepare)).thenReturn(true);
+        .thenReturn(false);
+    when(messageValidator.validatePrepareMessage(secondPrepare.getSignedPayload()))
+        .thenReturn(true);
 
     roundState.setProposedBlock(proposal);
     assertThat(roundState.isPrepared()).isFalse();
 
-    roundState.addPrepareMessage(new Prepare(firstPrepare));
+    roundState.addPrepareMessage(firstPrepare);
     assertThat(roundState.isPrepared()).isFalse();
 
-    roundState.addPrepareMessage(new Prepare(secondPrepare));
+    roundState.addPrepareMessage(secondPrepare);
     assertThat(roundState.isPrepared()).isTrue();
   }
 
@@ -250,26 +242,23 @@ public class RoundStateTest {
     final RoundState roundState = new RoundState(roundIdentifier, 2, messageValidator);
 
     final Commit firstCommit =
-        new Commit(
         validatorMessageFactories
             .get(1)
             .createSignedCommitPayload(
                 roundIdentifier,
                 block.getHash(),
-                    Signature.create(BigInteger.ONE, BigInteger.TEN, (byte) 1)));
+                Signature.create(BigInteger.ONE, BigInteger.TEN, (byte) 1));
 
     final Commit secondCommit =
-        new Commit(
         validatorMessageFactories
             .get(2)
             .createSignedCommitPayload(
                 roundIdentifier,
                 block.getHash(),
-                    Signature.create(BigInteger.TEN, BigInteger.TEN, (byte) 1)));
+                Signature.create(BigInteger.TEN, BigInteger.TEN, (byte) 1));
 
     final Proposal proposal =
-        new Proposal(
+        validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block);
-            validatorMessageFactories.get(0).createSignedProposalPayload(roundIdentifier, block));
 
     roundState.setProposedBlock(proposal);
     roundState.addCommitMessage(firstCommit);

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/validation/MessageValidatorTest.java

@@ -21,11 +21,10 @@ import static org.mockito.Mockito.when;
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.IbftContext;
 import tech.pegasys.pantheon.consensus.ibft.IbftExtraData;
-import tech.pegasys.pantheon.consensus.ibft.payload.CommitPayload;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Commit;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.crypto.SECP256K1;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.ethereum.BlockValidator;
@@ -105,164 +104,164 @@ public class MessageValidatorTest {
 
   @Test
   public void receivingAPrepareMessageBeforeProposalFails() {
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         proposerMessageFactory.createSignedPreparePayload(roundIdentifier, Hash.ZERO);
 
-    assertThat(validator.validatePrepareMessage(prepareMsg)).isFalse();
+    assertThat(validator.validatePrepareMessage(prepareMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void receivingACommitMessageBeforeProposalFails() {
-    final SignedData<CommitPayload> commitMsg =
+    final Commit commitMsg =
         proposerMessageFactory.createSignedCommitPayload(
             roundIdentifier, Hash.ZERO, SECP256K1.sign(Hash.ZERO, proposerKey));
 
-    assertThat(validator.validateCommmitMessage(commitMsg)).isFalse();
+    assertThat(validator.validateCommmitMessage(commitMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void receivingProposalMessageFromNonProposerFails() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         validatorMessageFactory.createSignedProposalPayload(roundIdentifier, mock(Block.class));
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isFalse();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void receivingProposalMessageWithIllegalBlockFails() {
     when(blockValidator.validateAndProcessBlock(any(), any(), any(), any())).thenReturn(empty());
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, mock(Block.class));
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isFalse();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void receivingPrepareFromProposerFails() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
 
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         proposerMessageFactory.createSignedPreparePayload(roundIdentifier, block.getHash());
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
-    assertThat(validator.validatePrepareMessage(prepareMsg)).isFalse();
+    assertThat(validator.validatePrepareMessage(prepareMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void receivingPrepareFromNonValidatorFails() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
 
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         nonValidatorMessageFactory.createSignedPreparePayload(roundIdentifier, block.getHash());
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
-    assertThat(validator.validatePrepareMessage(prepareMsg)).isFalse();
+    assertThat(validator.validatePrepareMessage(prepareMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void receivingMessagesWithDifferentRoundIdFromProposalFails() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
 
     final ConsensusRoundIdentifier invalidRoundIdentifier =
         new ConsensusRoundIdentifier(
             roundIdentifier.getSequenceNumber(), roundIdentifier.getRoundNumber() + 1);
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         validatorMessageFactory.createSignedPreparePayload(invalidRoundIdentifier, block.getHash());
-    final SignedData<CommitPayload> commitMsg =
+    final Commit commitMsg =
         validatorMessageFactory.createSignedCommitPayload(
             invalidRoundIdentifier, block.getHash(), SECP256K1.sign(block.getHash(), proposerKey));
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
-    assertThat(validator.validatePrepareMessage(prepareMsg)).isFalse();
+    assertThat(validator.validatePrepareMessage(prepareMsg.getSignedPayload())).isFalse();
-    assertThat(validator.validateCommmitMessage(commitMsg)).isFalse();
+    assertThat(validator.validateCommmitMessage(commitMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void receivingPrepareNonProposerValidatorWithCorrectRoundIsSuccessful() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         validatorMessageFactory.createSignedPreparePayload(roundIdentifier, block.getHash());
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
-    assertThat(validator.validatePrepareMessage(prepareMsg)).isTrue();
+    assertThat(validator.validatePrepareMessage(prepareMsg.getSignedPayload())).isTrue();
   }
 
   @Test
   public void receivingACommitMessageWithAnInvalidCommitSealFails() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
 
-    final SignedData<CommitPayload> commitMsg =
+    final Commit commitMsg =
         proposerMessageFactory.createSignedCommitPayload(
             roundIdentifier, block.getHash(), SECP256K1.sign(block.getHash(), nonValidatorKey));
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
-    assertThat(validator.validateCommmitMessage(commitMsg)).isFalse();
+    assertThat(validator.validateCommmitMessage(commitMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void commitMessageContainingValidSealFromValidatorIsSuccessful() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
 
-    final SignedData<CommitPayload> proposerCommitMsg =
+    final Commit proposerCommitMsg =
         proposerMessageFactory.createSignedCommitPayload(
             roundIdentifier, block.getHash(), SECP256K1.sign(block.getHash(), proposerKey));
 
-    final SignedData<CommitPayload> validatorCommitMsg =
+    final Commit validatorCommitMsg =
         validatorMessageFactory.createSignedCommitPayload(
             roundIdentifier, block.getHash(), SECP256K1.sign(block.getHash(), validatorKey));
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
-    assertThat(validator.validateCommmitMessage(proposerCommitMsg)).isTrue();
+    assertThat(validator.validateCommmitMessage(proposerCommitMsg.getSignedPayload())).isTrue();
-    assertThat(validator.validateCommmitMessage(validatorCommitMsg)).isTrue();
+    assertThat(validator.validateCommmitMessage(validatorCommitMsg.getSignedPayload())).isTrue();
   }
 
   @Test
   public void subsequentProposalHasDifferentSenderFails() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
 
-    final SignedData<ProposalPayload> secondProposalMsg =
+    final Proposal secondProposalMsg =
         validatorMessageFactory.createSignedProposalPayload(roundIdentifier, block);
-    assertThat(validator.addSignedProposalPayload(secondProposalMsg)).isFalse();
+    assertThat(validator.addSignedProposalPayload(secondProposalMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void subsequentProposalHasDifferentContentFails() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
 
     final ConsensusRoundIdentifier newRoundIdentifier = new ConsensusRoundIdentifier(3, 0);
-    final SignedData<ProposalPayload> secondProposalMsg =
+    final Proposal secondProposalMsg =
         proposerMessageFactory.createSignedProposalPayload(newRoundIdentifier, block);
-    assertThat(validator.addSignedProposalPayload(secondProposalMsg)).isFalse();
+    assertThat(validator.addSignedProposalPayload(secondProposalMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void subsequentProposalHasIdenticalSenderAndContentIsSuccessful() {
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isTrue();
 
-    final SignedData<ProposalPayload> secondProposalMsg =
+    final Proposal secondProposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
-    assertThat(validator.addSignedProposalPayload(secondProposalMsg)).isTrue();
+    assertThat(validator.addSignedProposalPayload(secondProposalMsg.getSignedPayload())).isTrue();
   }
 
   @Test
   public void blockRoundMisMatchWithMessageRoundFails() {
     insertRoundToBlockHeader(roundIdentifier.getRoundNumber() + 1);
 
-    final SignedData<ProposalPayload> proposalMsg =
+    final Proposal proposalMsg =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, block);
 
-    assertThat(validator.addSignedProposalPayload(proposalMsg)).isFalse();
+    assertThat(validator.addSignedProposalPayload(proposalMsg.getSignedPayload())).isFalse();
   }
 }

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/validation/NewRoundMessageValidatorTest.java

@@ -21,12 +21,12 @@ import static org.mockito.Mockito.when;
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
 import tech.pegasys.pantheon.consensus.ibft.TestHelpers;
 import tech.pegasys.pantheon.consensus.ibft.blockcreation.ProposerSelector;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.NewRound;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Proposal;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
 import tech.pegasys.pantheon.consensus.ibft.payload.NewRoundPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.ProposalPayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangeCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.validation.RoundChangeMessageValidator.MessageValidatorForHeightFactory;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.ethereum.core.Address;
@@ -61,7 +61,8 @@ public class NewRoundMessageValidatorTest {
   private final MessageValidator messageValidator = mock(MessageValidator.class);
 
   private Block proposedBlock;
-  private SignedData<NewRoundPayload> validMsg;
+  private NewRound validMsg;
+  private NewRoundPayload validPayload;
   private NewRoundPayload.Builder msgBuilder;
 
   @Before
@@ -72,7 +73,8 @@ public class NewRoundMessageValidatorTest {
 
     proposedBlock = TestHelpers.createProposalBlock(validators, roundIdentifier.getRoundNumber());
     validMsg = createValidNewRoundMessageSignedBy(proposerKey);
-    msgBuilder = NewRoundPayload.Builder.fromExisting(validMsg.getPayload());
+    validPayload = validMsg.getSignedPayload().getPayload();
+    msgBuilder = NewRoundPayload.Builder.fromExisting(validMsg);
 
     when(proposerSelector.selectProposerForRound(any())).thenReturn(proposerAddress);
 
@@ -89,7 +91,7 @@ public class NewRoundMessageValidatorTest {
    * message.
    */
 
-  private SignedData<NewRoundPayload> createValidNewRoundMessageSignedBy(final KeyPair signingKey) {
+  private NewRound createValidNewRoundMessageSignedBy(final KeyPair signingKey) {
     final MessageFactory messageCreator = new MessageFactory(signingKey);
 
     final RoundChangeCertificate.Builder builder = new RoundChangeCertificate.Builder();
@@ -99,11 +101,12 @@ public class NewRoundMessageValidatorTest {
     return messageCreator.createSignedNewRoundPayload(
         roundIdentifier,
         builder.buildCertificate(),
-        messageCreator.createSignedProposalPayload(roundIdentifier, proposedBlock));
+        messageCreator
+            .createSignedProposalPayload(roundIdentifier, proposedBlock)
+            .getSignedPayload());
   }
 
-  private SignedData<NewRoundPayload> signPayload(
+  private NewRound signPayload(final NewRoundPayload payload, final KeyPair signingKey) {
-      final NewRoundPayload payload, final KeyPair signingKey) {
 
     final MessageFactory messageCreator = new MessageFactory(signingKey);
 
@@ -115,14 +118,14 @@ public class NewRoundMessageValidatorTest {
 
   @Test
   public void basicNewRoundMessageIsValid() {
-    assertThat(validator.validateNewRoundMessage(validMsg)).isTrue();
+    assertThat(validator.validateNewRoundMessage(validMsg.getSignedPayload())).isTrue();
   }
 
   @Test
   public void newRoundFromNonProposerFails() {
-    final SignedData<NewRoundPayload> msg = signPayload(validMsg.getPayload(), validatorKey);
+    final NewRound msg = signPayload(validPayload, validatorKey);
 
-    assertThat(validator.validateNewRoundMessage(msg)).isFalse();
+    assertThat(validator.validateNewRoundMessage(msg.getSignedPayload())).isFalse();
   }
 
   @Test
@@ -130,9 +133,9 @@ public class NewRoundMessageValidatorTest {
     msgBuilder.setRoundChangeIdentifier(
         new ConsensusRoundIdentifier(roundIdentifier.getSequenceNumber(), 0));
 
-    final SignedData<NewRoundPayload> inValidMsg = signPayload(msgBuilder.build(), proposerKey);
+    final NewRound inValidMsg = signPayload(msgBuilder.build(), proposerKey);
 
-    assertThat(validator.validateNewRoundMessage(inValidMsg)).isFalse();
+    assertThat(validator.validateNewRoundMessage(inValidMsg.getSignedPayload())).isFalse();
   }
 
   @Test
@@ -140,18 +143,18 @@ public class NewRoundMessageValidatorTest {
     final ConsensusRoundIdentifier futureRound = TestHelpers.createFrom(roundIdentifier, 1, 0);
     msgBuilder.setRoundChangeIdentifier(futureRound);
 
-    final SignedData<NewRoundPayload> inValidMsg = signPayload(msgBuilder.build(), proposerKey);
+    final NewRound inValidMsg = signPayload(msgBuilder.build(), proposerKey);
 
-    assertThat(validator.validateNewRoundMessage(inValidMsg)).isFalse();
+    assertThat(validator.validateNewRoundMessage(inValidMsg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void newRoundWithEmptyRoundChangeCertificateFails() {
     msgBuilder.setRoundChangeCertificate(new RoundChangeCertificate(Collections.emptyList()));
 
-    final SignedData<NewRoundPayload> inValidMsg = signPayload(msgBuilder.build(), proposerKey);
+    final NewRound inValidMsg = signPayload(msgBuilder.build(), proposerKey);
 
-    assertThat(validator.validateNewRoundMessage(inValidMsg)).isFalse();
+    assertThat(validator.validateNewRoundMessage(inValidMsg.getSignedPayload())).isFalse();
   }
 
   @Test
@@ -164,20 +167,25 @@ public class NewRoundMessageValidatorTest {
 
     final PreparedCertificate misMatchedPreparedCertificate =
         new PreparedCertificate(
-            proposerMessageFactory.createSignedProposalPayload(preparedRound, prevProposedBlock),
+            proposerMessageFactory
+                .createSignedProposalPayload(preparedRound, prevProposedBlock)
+                .getSignedPayload(),
             singletonList(
-                validatorMessageFactory.createSignedPreparePayload(
+                validatorMessageFactory
-                    preparedRound, prevProposedBlock.getHash())));
+                    .createSignedPreparePayload(preparedRound, prevProposedBlock.getHash())
+                    .getSignedPayload()));
 
     msgBuilder.setRoundChangeCertificate(
         new RoundChangeCertificate(
             singletonList(
-                validatorMessageFactory.createSignedRoundChangePayload(
+                validatorMessageFactory
-                    roundIdentifier, Optional.of(misMatchedPreparedCertificate)))));
+                    .createSignedRoundChangePayload(
+                        roundIdentifier, Optional.of(misMatchedPreparedCertificate))
+                    .getSignedPayload())));
 
-    final SignedData<NewRoundPayload> invalidMsg = signPayload(msgBuilder.build(), proposerKey);
+    final NewRound invalidMsg = signPayload(msgBuilder.build(), proposerKey);
 
-    assertThat(validator.validateNewRoundMessage(invalidMsg)).isFalse();
+    assertThat(validator.validateNewRoundMessage(invalidMsg.getSignedPayload())).isFalse();
   }
 
   @Test
@@ -192,9 +200,9 @@ public class NewRoundMessageValidatorTest {
 
     msgBuilder.setRoundChangeCertificate(roundChangeBuilder.buildCertificate());
 
-    final SignedData<NewRoundPayload> msg = signPayload(msgBuilder.build(), proposerKey);
+    final NewRound msg = signPayload(msgBuilder.build(), proposerKey);
 
-    assertThat(validator.validateNewRoundMessage(msg)).isFalse();
+    assertThat(validator.validateNewRoundMessage(msg.getSignedPayload())).isFalse();
   }
 
   @Test
@@ -207,19 +215,22 @@ public class NewRoundMessageValidatorTest {
             roundIdentifier,
             Optional.of(
                 new PreparedCertificate(
-                    proposerMessageFactory.createSignedProposalPayload(prevRound, proposedBlock),
+                    proposerMessageFactory
+                        .createSignedProposalPayload(prevRound, proposedBlock)
+                        .getSignedPayload(),
                     Lists.newArrayList(
-                        validatorMessageFactory.createSignedPreparePayload(
+                        validatorMessageFactory
-                            prevRound, proposedBlock.getHash()))))));
+                            .createSignedPreparePayload(prevRound, proposedBlock.getHash())
+                            .getSignedPayload())))));
 
     msgBuilder.setRoundChangeCertificate(roundChangeBuilder.buildCertificate());
 
     // The prepare Message in the RoundChange Cert will be deemed illegal.
     when(messageValidator.validatePrepareMessage(any())).thenReturn(false);
 
-    final SignedData<NewRoundPayload> msg = signPayload(msgBuilder.build(), proposerKey);
+    final NewRound msg = signPayload(msgBuilder.build(), proposerKey);
 
-    assertThat(validator.validateNewRoundMessage(msg)).isFalse();
+    assertThat(validator.validateNewRoundMessage(msg.getSignedPayload())).isFalse();
   }
 
   @Test
@@ -227,15 +238,16 @@ public class NewRoundMessageValidatorTest {
     final ConsensusRoundIdentifier latterPrepareRound =
         new ConsensusRoundIdentifier(
             roundIdentifier.getSequenceNumber(), roundIdentifier.getRoundNumber() - 1);
-    final SignedData<ProposalPayload> latterProposal =
+    final Proposal latterProposal =
         proposerMessageFactory.createSignedProposalPayload(latterPrepareRound, proposedBlock);
     final Optional<PreparedCertificate> preparedCert =
         Optional.of(
             new PreparedCertificate(
-                latterProposal,
+                latterProposal.getSignedPayload(),
                 Lists.newArrayList(
-                    validatorMessageFactory.createSignedPreparePayload(
+                    validatorMessageFactory
-                        roundIdentifier, proposedBlock.getHash()))));
+                        .createSignedPreparePayload(roundIdentifier, proposedBlock.getHash())
+                        .getSignedPayload())));
 
     // An earlier PrepareCert is added to ensure the path to find the latest PrepareCert
     // is correctly followed.
@@ -244,54 +256,61 @@ public class NewRoundMessageValidatorTest {
     final ConsensusRoundIdentifier earlierPreparedRound =
         new ConsensusRoundIdentifier(
             roundIdentifier.getSequenceNumber(), roundIdentifier.getRoundNumber() - 2);
-    final SignedData<ProposalPayload> earlierProposal =
+    final Proposal earlierProposal =
         proposerMessageFactory.createSignedProposalPayload(earlierPreparedRound, earlierBlock);
     final Optional<PreparedCertificate> earlierPreparedCert =
         Optional.of(
             new PreparedCertificate(
-                earlierProposal,
+                earlierProposal.getSignedPayload(),
                 Lists.newArrayList(
-                    validatorMessageFactory.createSignedPreparePayload(
+                    validatorMessageFactory
-                        earlierPreparedRound, earlierBlock.getHash()))));
+                        .createSignedPreparePayload(earlierPreparedRound, earlierBlock.getHash())
+                        .getSignedPayload())));
 
     final RoundChangeCertificate roundChangeCert =
         new RoundChangeCertificate(
             Lists.newArrayList(
-                proposerMessageFactory.createSignedRoundChangePayload(
+                proposerMessageFactory
-                    roundIdentifier, earlierPreparedCert),
+                    .createSignedRoundChangePayload(roundIdentifier, earlierPreparedCert)
-                validatorMessageFactory.createSignedRoundChangePayload(
+                    .getSignedPayload(),
-                    roundIdentifier, preparedCert)));
+                validatorMessageFactory
+                    .createSignedRoundChangePayload(roundIdentifier, preparedCert)
+                    .getSignedPayload()));
 
     // Ensure a message containing the earlier proposal fails
-    final SignedData<NewRoundPayload> newRoundWithEarlierProposal =
+    final NewRound newRoundWithEarlierProposal =
         proposerMessageFactory.createSignedNewRoundPayload(
-            roundIdentifier, roundChangeCert, earlierProposal);
+            roundIdentifier, roundChangeCert, earlierProposal.getSignedPayload());
-    assertThat(validator.validateNewRoundMessage(newRoundWithEarlierProposal)).isFalse();
+    assertThat(validator.validateNewRoundMessage(newRoundWithEarlierProposal.getSignedPayload()))
+        .isFalse();
 
-    final SignedData<NewRoundPayload> newRoundWithLatterProposal =
+    final NewRound newRoundWithLatterProposal =
         proposerMessageFactory.createSignedNewRoundPayload(
-            roundIdentifier, roundChangeCert, latterProposal);
+            roundIdentifier, roundChangeCert, latterProposal.getSignedPayload());
-    assertThat(validator.validateNewRoundMessage(newRoundWithLatterProposal)).isTrue();
+    assertThat(validator.validateNewRoundMessage(newRoundWithLatterProposal.getSignedPayload()))
+        .isTrue();
   }
 
   @Test
   public void embeddedProposalFailsValidation() {
     when(messageValidator.addSignedProposalPayload(any())).thenReturn(false, true);
 
-    final SignedData<ProposalPayload> proposal =
+    final Proposal proposal =
         proposerMessageFactory.createSignedProposalPayload(roundIdentifier, proposedBlock);
 
-    final SignedData<NewRoundPayload> msg =
+    final NewRound msg =
         proposerMessageFactory.createSignedNewRoundPayload(
             roundIdentifier,
             new RoundChangeCertificate(
                 Lists.newArrayList(
-                    proposerMessageFactory.createSignedRoundChangePayload(
+                    proposerMessageFactory
-                        roundIdentifier, Optional.empty()),
+                        .createSignedRoundChangePayload(roundIdentifier, Optional.empty())
-                    validatorMessageFactory.createSignedRoundChangePayload(
+                        .getSignedPayload(),
-                        roundIdentifier, Optional.empty()))),
+                    validatorMessageFactory
-            proposal);
+                        .createSignedRoundChangePayload(roundIdentifier, Optional.empty())
-
+                        .getSignedPayload())),
-    assertThat(validator.validateNewRoundMessage(msg)).isFalse();
+            proposal.getSignedPayload());
+
+    assertThat(validator.validateNewRoundMessage(msg.getSignedPayload())).isFalse();
   }
 }

consensus/ibft/src/test/java/tech/pegasys/pantheon/consensus/ibft/validation/RoundChangeMessageValidatorTest.java

@@ -21,11 +21,10 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import tech.pegasys.pantheon.consensus.ibft.ConsensusRoundIdentifier;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.Prepare;
+import tech.pegasys.pantheon.consensus.ibft.messagewrappers.RoundChange;
 import tech.pegasys.pantheon.consensus.ibft.payload.MessageFactory;
-import tech.pegasys.pantheon.consensus.ibft.payload.PreparePayload;
 import tech.pegasys.pantheon.consensus.ibft.payload.PreparedCertificate;
-import tech.pegasys.pantheon.consensus.ibft.payload.RoundChangePayload;
-import tech.pegasys.pantheon.consensus.ibft.payload.SignedData;
 import tech.pegasys.pantheon.consensus.ibft.validation.RoundChangeMessageValidator.MessageValidatorForHeightFactory;
 import tech.pegasys.pantheon.crypto.SECP256K1.KeyPair;
 import tech.pegasys.pantheon.ethereum.core.Address;
@@ -81,33 +80,35 @@ public class RoundChangeMessageValidatorTest {
 
   @Test
   public void roundChangeSentByNonValidatorFails() {
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         nonValidatorMessageFactory.createSignedRoundChangePayload(targetRound, Optional.empty());
-    assertThat(validator.validateMessage(msg)).isFalse();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void roundChangeContainingNoCertificateIsSuccessful() {
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         proposerMessageFactory.createSignedRoundChangePayload(targetRound, Optional.empty());
 
-    assertThat(validator.validateMessage(msg)).isTrue();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isTrue();
   }
 
   @Test
   public void roundChangeContainingInvalidProposalFails() {
     final PreparedCertificate prepareCertificate =
         new PreparedCertificate(
-            proposerMessageFactory.createSignedProposalPayload(currentRound, block),
+            proposerMessageFactory
+                .createSignedProposalPayload(currentRound, block)
+                .getSignedPayload(),
             Collections.emptyList());
 
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         proposerMessageFactory.createSignedRoundChangePayload(
             targetRound, Optional.of(prepareCertificate));
 
     when(basicValidator.addSignedProposalPayload(any())).thenReturn(false);
 
-    assertThat(validator.validateMessage(msg)).isFalse();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isFalse();
     verify(validatorFactory, times(1))
         .createAt(prepareCertificate.getProposalPayload().getPayload().getRoundIdentifier());
     verify(basicValidator, times(1))
@@ -120,36 +121,40 @@ public class RoundChangeMessageValidatorTest {
   public void roundChangeContainingValidProposalButNoPrepareMessagesFails() {
     final PreparedCertificate prepareCertificate =
         new PreparedCertificate(
-            proposerMessageFactory.createSignedProposalPayload(currentRound, block),
+            proposerMessageFactory
+                .createSignedProposalPayload(currentRound, block)
+                .getSignedPayload(),
             Collections.emptyList());
 
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         proposerMessageFactory.createSignedRoundChangePayload(
             targetRound, Optional.of(prepareCertificate));
 
     when(basicValidator.addSignedProposalPayload(any())).thenReturn(true);
-    assertThat(validator.validateMessage(msg)).isFalse();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isFalse();
   }
 
   @Test
   public void roundChangeInvalidPrepareMessageFromProposerFails() {
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         validatorMessageFactory.createSignedPreparePayload(currentRound, block.getHash());
     final PreparedCertificate prepareCertificate =
         new PreparedCertificate(
-            proposerMessageFactory.createSignedProposalPayload(currentRound, block),
+            proposerMessageFactory
-            Lists.newArrayList(prepareMsg));
+                .createSignedProposalPayload(currentRound, block)
+                .getSignedPayload(),
+            Lists.newArrayList(prepareMsg.getSignedPayload()));
 
     when(basicValidator.addSignedProposalPayload(any())).thenReturn(true);
     when(basicValidator.validatePrepareMessage(any())).thenReturn(false);
 
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         proposerMessageFactory.createSignedRoundChangePayload(
             targetRound, Optional.of(prepareCertificate));
 
-    assertThat(validator.validateMessage(msg)).isFalse();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isFalse();
 
-    verify(basicValidator, times(1)).validatePrepareMessage(prepareMsg);
+    verify(basicValidator, times(1)).validatePrepareMessage(prepareMsg.getSignedPayload());
     verify(basicValidator, never()).validateCommmitMessage(any());
   }
 
@@ -158,11 +163,11 @@ public class RoundChangeMessageValidatorTest {
     final ConsensusRoundIdentifier latterRoundIdentifier =
         new ConsensusRoundIdentifier(currentRound.getSequenceNumber() + 1, 1);
 
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         proposerMessageFactory.createSignedRoundChangePayload(
             latterRoundIdentifier, Optional.empty());
 
-    assertThat(validator.validateMessage(msg)).isFalse();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isFalse();
     verify(basicValidator, never()).validatePrepareMessage(any());
   }
 
@@ -172,45 +177,49 @@ public class RoundChangeMessageValidatorTest {
         new ConsensusRoundIdentifier(
             currentRound.getSequenceNumber(), currentRound.getRoundNumber() + 2);
 
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         validatorMessageFactory.createSignedPreparePayload(futureRound, block.getHash());
     final PreparedCertificate prepareCertificate =
         new PreparedCertificate(
-            proposerMessageFactory.createSignedProposalPayload(futureRound, block),
+            proposerMessageFactory
-            Lists.newArrayList(prepareMsg));
+                .createSignedProposalPayload(futureRound, block)
+                .getSignedPayload(),
+            Lists.newArrayList(prepareMsg.getSignedPayload()));
 
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         proposerMessageFactory.createSignedRoundChangePayload(
             targetRound, Optional.of(prepareCertificate));
 
-    assertThat(validator.validateMessage(msg)).isFalse();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isFalse();
     verify(validatorFactory, never()).createAt(any());
-    verify(basicValidator, never()).validatePrepareMessage(prepareMsg);
+    verify(basicValidator, never()).validatePrepareMessage(prepareMsg.getSignedPayload());
     verify(basicValidator, never()).validateCommmitMessage(any());
   }
 
   @Test
   public void roundChangeWithPastProposalForCurrentHeightIsSuccessful() {
-    final SignedData<PreparePayload> prepareMsg =
+    final Prepare prepareMsg =
         validatorMessageFactory.createSignedPreparePayload(currentRound, block.getHash());
     final PreparedCertificate prepareCertificate =
         new PreparedCertificate(
-            proposerMessageFactory.createSignedProposalPayload(currentRound, block),
+            proposerMessageFactory
-            Lists.newArrayList(prepareMsg));
+                .createSignedProposalPayload(currentRound, block)
+                .getSignedPayload(),
+            Lists.newArrayList(prepareMsg.getSignedPayload()));
 
-    final SignedData<RoundChangePayload> msg =
+    final RoundChange msg =
         proposerMessageFactory.createSignedRoundChangePayload(
             targetRound, Optional.of(prepareCertificate));
 
     when(basicValidator.addSignedProposalPayload(prepareCertificate.getProposalPayload()))
         .thenReturn(true);
-    when(basicValidator.validatePrepareMessage(prepareMsg)).thenReturn(true);
+    when(basicValidator.validatePrepareMessage(prepareMsg.getSignedPayload())).thenReturn(true);
 
-    assertThat(validator.validateMessage(msg)).isTrue();
+    assertThat(validator.validateMessage(msg.getSignedPayload())).isTrue();
     verify(validatorFactory, times(1))
         .createAt(prepareCertificate.getProposalPayload().getPayload().getRoundIdentifier());
     verify(basicValidator, times(1))
         .addSignedProposalPayload(prepareCertificate.getProposalPayload());
-    verify(basicValidator, times(1)).validatePrepareMessage(prepareMsg);
+    verify(basicValidator, times(1)).validatePrepareMessage(prepareMsg.getSignedPayload());
   }
 }