Improve eth/66 support (hyperledger#3616)

Currently Besu has a limited support for sending NewPooledTransactionHashes messages, and other aspect related to reduce transactions synchronization traffic, described in the Ethereum Wire Protocol version 66. Specifically: Besu only uses NewPooledTransactionHashes for new local transactions, while it could be extended to any transaction added to the transaction pool Besu does not limit the sending of the full transaction messages to a small fraction of the connected peers, and sends the new transaction hashes to all the remaining peers This PR, extends eth/66 support and does some code refactoring, to remove some reduntant code and rename some classes to identify they are related to the NewPooledTransactionHashes message. The main changes are: Do not have a separate tracker for transaction hashes, since for them we can reuse PeerTransactionTracker, that tracks full transactions exchange history and sending queue with a peer. So PeerPendingTransactionTracker has been removed. --tx-pool-hashes-max-size is now deprecated and has no more effect and it will be removed in a future release. When a new peer connects, if it support eth/6[56] then we send all the transaction hashes we have in the pool, otherwise we send the full transactions. When new transactions are added to the pool, we send full transactions to peers without eth/6[56] support, or to a small fractions of all peers, and then we send only transaction hashes to the remaining peer that support eth/6[56]. Both transactions and transaction hashes are only sent if not already exchanged with that specific peer. Signed-off-by: Fabio Di Fabio <[email protected]> Signed-off-by: Justin Florentine <[email protected]>
jflo · Mar 25, 2022 · 412feae · 412feae
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -3,10 +3,14 @@
 ## 22.1.3
 
 ### Breaking Changes
-- Remove the experimental flag for bonsai tries CLI options '--data-storage-format' and '--bonsai-maximum-back-layers-to-load' [#3578](https://github.com/hyperledger/besu/pull/3578)
+- Remove the experimental flag for bonsai tries CLI options `--data-storage-format` and `--bonsai-maximum-back-layers-to-load` [#3578](https://github.com/hyperledger/besu/pull/3578)
+
+### Deprecations
+- `--tx-pool-hashes-max-size` is now deprecated and has no more effect and it will be removed in a future release.
 
 ### Additions and Improvements
 - Tune transaction synchronization parameter to adapt to mainnet traffic [#3610](https://github.com/hyperledger/besu/pull/3610)
+- Improve eth/66 support [#3616](https://github.com/hyperledger/besu/pull/3616)
 
 ## 22.1.2
 

diff --git a/besu/src/main/java/org/hyperledger/besu/cli/BesuCommand.java b/besu/src/main/java/org/hyperledger/besu/cli/BesuCommand.java
@@ -21,6 +21,7 @@
 import static org.hyperledger.besu.cli.DefaultCommandValues.getDefaultBesuDataPath;
 import static org.hyperledger.besu.cli.config.NetworkName.MAINNET;
 import static org.hyperledger.besu.cli.util.CommandLineUtils.DEPENDENCY_WARNING_MSG;
+import static org.hyperledger.besu.cli.util.CommandLineUtils.DEPRECATED_AND_USELESS_WARNING_MSG;
 import static org.hyperledger.besu.cli.util.CommandLineUtils.DEPRECATION_WARNING_MSG;
 import static org.hyperledger.besu.config.experimental.MergeConfigOptions.isMergeEnabled;
 import static org.hyperledger.besu.controller.BesuController.DATABASE_PATH;
@@ -1117,10 +1118,10 @@ static class JsonRPCWebsocketOptionGroup {
       names = {"--tx-pool-hashes-max-size"},
       paramLabel = MANDATORY_INTEGER_FORMAT_HELP,
       description =
-          "Maximum number of pending transaction hashes that will be kept in the transaction pool (default: ${DEFAULT-VALUE})",
+          "Deprecated, has not effect. Maximum number of pending transaction hashes that will be kept in the transaction pool",
       arity = "1")
-  private final Integer pooledTransactionHashesSize =
-      TransactionPoolConfiguration.MAX_PENDING_TRANSACTIONS_HASHES;
+  @SuppressWarnings("unused")
+  private final Integer pooledTransactionHashesSize = null; // NOSONAR
 
   @Option(
       names = {"--tx-pool-retention-hours"},
@@ -1826,6 +1827,10 @@ private void issueOptionWarnings() {
           "--privacy-onchain-groups-enabled",
           "--privacy-flexible-groups-enabled");
     }
+
+    if (pooledTransactionHashesSize != null) { // NOSONAR
+      logger.warn(DEPRECATED_AND_USELESS_WARNING_MSG, "--tx-pool-hashes-max-size");
+    }
   }
 
   private void configure() throws Exception {
@@ -2651,7 +2656,6 @@ private TransactionPoolConfiguration buildTransactionPoolConfiguration() {
     return unstableTransactionPoolOptions
         .toDomainObject()
         .txPoolMaxSize(txPoolMaxSize)
-        .pooledTransactionHashesSize(pooledTransactionHashesSize)
         .pendingTxRetentionPeriod(pendingTxRetentionPeriod)
         .priceBump(Percentage.fromInt(priceBump))
         .txFeeCap(txFeeCap)

diff --git a/besu/src/main/java/org/hyperledger/besu/cli/util/CommandLineUtils.java b/besu/src/main/java/org/hyperledger/besu/cli/util/CommandLineUtils.java
@@ -29,6 +29,8 @@ public class CommandLineUtils {
   public static final String MULTI_DEPENDENCY_WARNING_MSG =
       "{} ignored because none of {} was defined.";
   public static final String DEPRECATION_WARNING_MSG = "{} has been deprecated, use {} instead.";
+  public static final String DEPRECATED_AND_USELESS_WARNING_MSG =
+      "{} has been deprecated and is now useless, remove it.";
 
   /**
    * Check if options are passed that require an option to be true to have any effect and log a

diff --git a/besu/src/test/java/org/hyperledger/besu/cli/BesuCommandTest.java b/besu/src/test/java/org/hyperledger/besu/cli/BesuCommandTest.java
@@ -26,6 +26,7 @@
 import static org.hyperledger.besu.cli.config.NetworkName.RINKEBY;
 import static org.hyperledger.besu.cli.config.NetworkName.ROPSTEN;
 import static org.hyperledger.besu.cli.util.CommandLineUtils.DEPENDENCY_WARNING_MSG;
+import static org.hyperledger.besu.cli.util.CommandLineUtils.DEPRECATED_AND_USELESS_WARNING_MSG;
 import static org.hyperledger.besu.cli.util.CommandLineUtils.DEPRECATION_WARNING_MSG;
 import static org.hyperledger.besu.ethereum.api.jsonrpc.RpcApis.ENGINE;
 import static org.hyperledger.besu.ethereum.api.jsonrpc.RpcApis.ETH;
@@ -3884,6 +3885,13 @@ public void onchainPrivacyGroupEnabledOptionIsDeprecated() {
             "--privacy-flexible-groups-enabled");
   }
 
+  @Test
+  public void txPoolHashesMaxSizeOptionIsDeprecated() {
+    parseCommand("--tx-pool-hashes-max-size", "1024");
+
+    verify(mockLogger).warn(DEPRECATED_AND_USELESS_WARNING_MSG, "--tx-pool-hashes-max-size");
+  }
+
   @Test
   public void flexiblePrivacyGroupEnabledFlagValueIsSet() {
     parseCommand(

diff --git a/...test/java/org/hyperledger/besu/consensus/clique/blockcreation/CliqueBlockCreatorTest.java b/...test/java/org/hyperledger/besu/consensus/clique/blockcreation/CliqueBlockCreatorTest.java
@@ -133,7 +133,6 @@ public void proposerAddressCanBeExtractFromAConstructedBlock() {
             new GasPricePendingTransactionsSorter(
                 TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
                 5,
-                5,
                 TestClock.fixed(),
                 metricsSystem,
                 blockchain::getChainHeadHeader,
@@ -169,7 +168,6 @@ public void insertsValidVoteIntoConstructedBlock() {
             new GasPricePendingTransactionsSorter(
                 TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
                 5,
-                5,
                 TestClock.fixed(),
                 metricsSystem,
                 blockchain::getChainHeadHeader,
@@ -207,7 +205,6 @@ public void insertsNoVoteWhenAtEpoch() {
             new GasPricePendingTransactionsSorter(
                 TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
                 5,
-                5,
                 TestClock.fixed(),
                 metricsSystem,
                 blockchain::getChainHeadHeader,

diff --git a/...est/java/org/hyperledger/besu/consensus/clique/blockcreation/CliqueMinerExecutorTest.java b/...est/java/org/hyperledger/besu/consensus/clique/blockcreation/CliqueMinerExecutorTest.java
@@ -96,7 +96,6 @@ public void extraDataCreatedOnEpochBlocksContainsValidators() {
             new GasPricePendingTransactionsSorter(
                 TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
                 1,
-                5,
                 TestClock.fixed(),
                 metricsSystem,
                 CliqueMinerExecutorTest::mockBlockHeader,
@@ -141,7 +140,6 @@ public void extraDataForNonEpochBlocksDoesNotContainValidaors() {
             new GasPricePendingTransactionsSorter(
                 TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
                 1,
-                5,
                 TestClock.fixed(),
                 metricsSystem,
                 CliqueMinerExecutorTest::mockBlockHeader,
@@ -186,7 +184,6 @@ public void shouldUseLatestVanityData() {
             new GasPricePendingTransactionsSorter(
                 TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
                 1,
-                5,
                 TestClock.fixed(),
                 metricsSystem,
                 CliqueMinerExecutorTest::mockBlockHeader,

diff --git a/...integration-test/java/org/hyperledger/besu/consensus/ibft/support/TestContextBuilder.java b/...integration-test/java/org/hyperledger/besu/consensus/ibft/support/TestContextBuilder.java
@@ -334,7 +334,6 @@ private static ControllerAndState createControllerAndFinalState(
         new GasPricePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            1,
             clock,
             metricsSystem,
             blockChain::getChainHeadHeader,

diff --git a/.../src/test/java/org/hyperledger/besu/consensus/ibft/blockcreation/BftBlockCreatorTest.java b/.../src/test/java/org/hyperledger/besu/consensus/ibft/blockcreation/BftBlockCreatorTest.java
@@ -118,7 +118,6 @@ public BlockHeaderValidator.Builder createBlockHeaderRuleset(
         new GasPricePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            5,
             TestClock.fixed(),
             metricsSystem,
             blockchain::getChainHeadHeader,

diff --git a/...est/java/org/hyperledger/besu/consensus/ibftlegacy/blockcreation/BftBlockCreatorTest.java b/...est/java/org/hyperledger/besu/consensus/ibftlegacy/blockcreation/BftBlockCreatorTest.java
@@ -107,7 +107,6 @@ public void headerProducedPassesValidationRules() {
             new GasPricePendingTransactionsSorter(
                 TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
                 1,
-                5,
                 TestClock.fixed(),
                 metricsSystem,
                 blockchain::getChainHeadHeader,

diff --git a/...integration-test/java/org/hyperledger/besu/consensus/qbft/support/TestContextBuilder.java b/...integration-test/java/org/hyperledger/besu/consensus/qbft/support/TestContextBuilder.java
@@ -439,7 +439,6 @@ private static ControllerAndState createControllerAndFinalState(
         new GasPricePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            1,
             clock,
             metricsSystem,
             blockChain::getChainHeadHeader,

diff --git a/...r/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetFilterChangesIntegrationTest.java b/...r/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetFilterChangesIntegrationTest.java
@@ -49,10 +49,8 @@
 import org.hyperledger.besu.ethereum.eth.manager.EthContext;
 import org.hyperledger.besu.ethereum.eth.manager.EthPeers;
 import org.hyperledger.besu.ethereum.eth.sync.state.SyncState;
-import org.hyperledger.besu.ethereum.eth.transactions.PeerPendingTransactionTracker;
-import org.hyperledger.besu.ethereum.eth.transactions.PeerTransactionTracker;
+import org.hyperledger.besu.ethereum.eth.transactions.TransactionBroadcaster;
 import org.hyperledger.besu.ethereum.eth.transactions.TransactionPool;
-import org.hyperledger.besu.ethereum.eth.transactions.TransactionPool.TransactionBatchAddedListener;
 import org.hyperledger.besu.ethereum.eth.transactions.TransactionPoolConfiguration;
 import org.hyperledger.besu.ethereum.eth.transactions.sorter.GasPricePendingTransactionsSorter;
 import org.hyperledger.besu.metrics.noop.NoOpMetricsSystem;
@@ -75,8 +73,7 @@
 @RunWith(MockitoJUnitRunner.class)
 public class EthGetFilterChangesIntegrationTest {
 
-  @Mock private TransactionBatchAddedListener batchAddedListener;
-  @Mock private TransactionBatchAddedListener pendingBatchAddedListener;
+  @Mock private TransactionBroadcaster batchAddedListener;
   private MutableBlockchain blockchain;
   private final String ETH_METHOD = "eth_getFilterChanges";
   private final String JSON_RPC_VERSION = "2.0";
@@ -86,7 +83,6 @@ public class EthGetFilterChangesIntegrationTest {
   private GasPricePendingTransactionsSorter transactions;
 
   private static final int MAX_TRANSACTIONS = 5;
-  private static final int MAX_HASHES = 5;
   private static final KeyPair keyPair = SignatureAlgorithmFactory.getInstance().generateKeyPair();
   private final Transaction transaction = createTransaction(1);
   private FilterManager filterManager;
@@ -101,16 +97,12 @@ public void setUp() {
         new GasPricePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             MAX_TRANSACTIONS,
-            MAX_HASHES,
             TestClock.fixed(),
             metricsSystem,
             blockchain::getChainHeadHeader,
             TransactionPoolConfiguration.DEFAULT_PRICE_BUMP);
     final ProtocolContext protocolContext = executionContext.getProtocolContext();
 
-    PeerTransactionTracker peerTransactionTracker = mock(PeerTransactionTracker.class);
-    PeerPendingTransactionTracker peerPendingTransactionTracker =
-        mock(PeerPendingTransactionTracker.class);
     EthContext ethContext = mock(EthContext.class);
     EthPeers ethPeers = mock(EthPeers.class);
     when(ethContext.getEthPeers()).thenReturn(ethPeers);
@@ -121,11 +113,8 @@ public void setUp() {
             executionContext.getProtocolSchedule(),
             protocolContext,
             batchAddedListener,
-            pendingBatchAddedListener,
             syncState,
             ethContext,
-            peerTransactionTracker,
-            peerPendingTransactionTracker,
             new MiningParameters.Builder().minTransactionGasPrice(Wei.ZERO).build(),
             metricsSystem,
             TransactionPoolConfiguration.DEFAULT);

diff --git a/...ger/besu/ethereum/api/jsonrpc/methods/fork/london/EthGetFilterChangesIntegrationTest.java b/...ger/besu/ethereum/api/jsonrpc/methods/fork/london/EthGetFilterChangesIntegrationTest.java
@@ -49,10 +49,8 @@
 import org.hyperledger.besu.ethereum.eth.manager.EthContext;
 import org.hyperledger.besu.ethereum.eth.manager.EthPeers;
 import org.hyperledger.besu.ethereum.eth.sync.state.SyncState;
-import org.hyperledger.besu.ethereum.eth.transactions.PeerPendingTransactionTracker;
-import org.hyperledger.besu.ethereum.eth.transactions.PeerTransactionTracker;
+import org.hyperledger.besu.ethereum.eth.transactions.TransactionBroadcaster;
 import org.hyperledger.besu.ethereum.eth.transactions.TransactionPool;
-import org.hyperledger.besu.ethereum.eth.transactions.TransactionPool.TransactionBatchAddedListener;
 import org.hyperledger.besu.ethereum.eth.transactions.TransactionPoolConfiguration;
 import org.hyperledger.besu.ethereum.eth.transactions.sorter.BaseFeePendingTransactionsSorter;
 import org.hyperledger.besu.metrics.noop.NoOpMetricsSystem;
@@ -75,8 +73,7 @@
 @RunWith(MockitoJUnitRunner.class)
 public class EthGetFilterChangesIntegrationTest {
 
-  @Mock private TransactionBatchAddedListener batchAddedListener;
-  @Mock private TransactionBatchAddedListener pendingBatchAddedListener;
+  @Mock private TransactionBroadcaster batchAddedListener;
   private MutableBlockchain blockchain;
   private final String ETH_METHOD = "eth_getFilterChanges";
   private final String JSON_RPC_VERSION = "2.0";
@@ -86,7 +83,6 @@ public class EthGetFilterChangesIntegrationTest {
   private BaseFeePendingTransactionsSorter transactions;
 
   private static final int MAX_TRANSACTIONS = 5;
-  private static final int MAX_HASHES = 5;
   private static final KeyPair keyPair = SignatureAlgorithmFactory.getInstance().generateKeyPair();
   private final Transaction transaction = createTransaction(1);
   private FilterManager filterManager;
@@ -101,16 +97,12 @@ public void setUp() {
         new BaseFeePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             MAX_TRANSACTIONS,
-            MAX_HASHES,
             TestClock.fixed(),
             metricsSystem,
             blockchain::getChainHeadHeader,
             TransactionPoolConfiguration.DEFAULT_PRICE_BUMP);
     final ProtocolContext protocolContext = executionContext.getProtocolContext();
 
-    PeerTransactionTracker peerTransactionTracker = mock(PeerTransactionTracker.class);
-    PeerPendingTransactionTracker peerPendingTransactionTracker =
-        mock(PeerPendingTransactionTracker.class);
     EthContext ethContext = mock(EthContext.class);
     EthPeers ethPeers = mock(EthPeers.class);
     when(ethContext.getEthPeers()).thenReturn(ethPeers);
@@ -121,11 +113,8 @@ public void setUp() {
             executionContext.getProtocolSchedule(),
             protocolContext,
             batchAddedListener,
-            pendingBatchAddedListener,
             syncState,
             ethContext,
-            peerTransactionTracker,
-            peerPendingTransactionTracker,
             new MiningParameters.Builder().minTransactionGasPrice(Wei.ZERO).build(),
             metricsSystem,
             TransactionPoolConfiguration.DEFAULT);

diff --git a/...c/test/java/org/hyperledger/besu/ethereum/blockcreation/BlockTransactionSelectorTest.java b/...c/test/java/org/hyperledger/besu/ethereum/blockcreation/BlockTransactionSelectorTest.java
@@ -84,7 +84,6 @@ public class BlockTransactionSelectorTest {
       new GasPricePendingTransactionsSorter(
           TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
           5,
-          5,
           TestClock.fixed(),
           metricsSystem,
           BlockTransactionSelectorTest::mockBlockHeader,
@@ -337,7 +336,6 @@ public void useSingleGasSpaceForAllTransactions() {
         new BaseFeePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             5,
-            5,
             TestClock.fixed(),
             metricsSystem,
             () -> {

diff --git a/...eation/src/test/java/org/hyperledger/besu/ethereum/blockcreation/PoWBlockCreatorTest.java b/...eation/src/test/java/org/hyperledger/besu/ethereum/blockcreation/PoWBlockCreatorTest.java
@@ -96,7 +96,6 @@ public void createMainnetBlock1() throws IOException {
         new BaseFeePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            5,
             TestClock.fixed(),
             metricsSystem,
             executionContextTestFixture.getProtocolContext().getBlockchain()::getChainHeadHeader,
@@ -158,7 +157,6 @@ public void createMainnetBlock1_fixedDifficulty1() {
         new BaseFeePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            5,
             TestClock.fixed(),
             metricsSystem,
             executionContextTestFixture.getProtocolContext().getBlockchain()::getChainHeadHeader,
@@ -215,7 +213,6 @@ public void rewardBeneficiary_zeroReward_skipZeroRewardsFalse() {
         new BaseFeePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            5,
             TestClock.fixed(),
             metricsSystem,
             executionContextTestFixture.getProtocolContext().getBlockchain()::getChainHeadHeader,
@@ -288,7 +285,6 @@ public void rewardBeneficiary_zeroReward_skipZeroRewardsTrue() {
         new BaseFeePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            5,
             TestClock.fixed(),
             metricsSystem,
             executionContextTestFixture.getProtocolContext().getBlockchain()::getChainHeadHeader,

diff --git a/...ation/src/test/java/org/hyperledger/besu/ethereum/blockcreation/PoWMinerExecutorTest.java b/...ation/src/test/java/org/hyperledger/besu/ethereum/blockcreation/PoWMinerExecutorTest.java
@@ -45,7 +45,6 @@ public void startingMiningWithoutCoinbaseThrowsException() {
         new GasPricePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            5,
             TestClock.fixed(),
             metricsSystem,
             PoWMinerExecutorTest::mockBlockHeader,
@@ -75,7 +74,6 @@ public void settingCoinbaseToNullThrowsException() {
         new GasPricePendingTransactionsSorter(
             TransactionPoolConfiguration.DEFAULT_TX_RETENTION_HOURS,
             1,
-            5,
             TestClock.fixed(),
             metricsSystem,
             PoWMinerExecutorTest::mockBlockHeader,

diff --git a/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/Transaction.java b/ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/Transaction.java
@@ -38,9 +38,11 @@
 
 import java.math.BigInteger;
 import java.util.Arrays;
+import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import org.apache.tuweni.bytes.Bytes;
@@ -680,6 +682,17 @@ public boolean isGoQuorumPrivateTransaction(final boolean goQuorumCompatibilityM
     return GoQuorumPrivateTransactionDetector.isGoQuorumPrivateTransactionV(v.get());
   }
 
+  /**
+   * Return the list of transaction hashes extracted from the collection of Transaction passed as
+   * argument
+   *
+   * @param transactions a collection of transactions
+   * @return the list of transaction hashes
+   */
+  public static List<Hash> toHashList(final Collection<Transaction> transactions) {
+    return transactions.stream().map(Transaction::getHash).collect(Collectors.toUnmodifiableList());
+  }
+
   private static Bytes32 computeSenderRecoveryHash(
       final TransactionType transactionType,
       final long nonce,

diff --git a/ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/manager/EthPeer.java b/ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/manager/EthPeer.java
@@ -515,6 +515,11 @@ public Bytes nodeId() {
     return connection.getPeerInfo().getNodeId();
   }
 
+  public boolean hasSupportForMessage(final int messageCode) {
+    return getAgreedCapabilities().stream()
+        .anyMatch(cap -> EthProtocol.get().isValidMessageCode(cap.getVersion(), messageCode));
+  }
+
   @Override
   public String toString() {
     return String.format("Peer %s...", nodeId().toString().substring(0, 20));