default target gas limit for holesky (#8125)

* default target gas limit for holesky

---------

Signed-off-by: Sally MacFarlane <macfarla.github@gmail.com>
Signed-off-by: Justin Florentine <justin+github@florentine.us>
Co-authored-by: Justin Florentine <justin+github@florentine.us>

Author: macfarla

CHANGELOG.md

@@ -29,6 +29,7 @@
 - Improve debug_traceBlock calls performance and reduce output size [#8076](https://github.com/hyperledger/besu/pull/8076)
 - Add support for EIP-7702 transaction in the txpool [#8018](https://github.com/hyperledger/besu/pull/8018) [#7984](https://github.com/hyperledger/besu/pull/7984)
 - Add support for `movePrecompileToAddress` in `StateOverrides` (`eth_call`)[8115](https://github.com/hyperledger/besu/pull/8115)
+- Default target-gas-limit to 36M for holesky [#8125](https://github.com/hyperledger/besu/pull/8125)
 - Add EIP-7623 - Increase calldata cost [#8093](https://github.com/hyperledger/besu/pull/8093)
 
 ### Bug fixes

besu/src/main/java/org/hyperledger/besu/cli/BesuCommand.java

@@ -2132,6 +2132,13 @@ private MiningConfiguration getMiningParameters() {
     getGenesisBlockPeriodSeconds(genesisConfigOptionsSupplier.get())
         .ifPresent(miningParameters::setBlockPeriodSeconds);
     initMiningParametersMetrics(miningParameters);
+    // if network = holesky, set targetGasLimit to 36,000,000 unless otherwise specified
+    if (miningParameters.getTargetGasLimit().isEmpty() && NetworkName.HOLESKY.equals(network)) {
+      logger.info(
+          "Setting target gas limit for holesky: {}",
+          MiningConfiguration.DEFAULT_TARGET_GAS_LIMIT_HOLESKY);
+      miningParameters.setTargetGasLimit(MiningConfiguration.DEFAULT_TARGET_GAS_LIMIT_HOLESKY);
+    }
     return miningParameters;
   }
 

besu/src/test/java/org/hyperledger/besu/cli/BesuCommandTest.java

@@ -1911,6 +1911,58 @@ public void holeskyValuesAreUsed() {
     verify(mockLogger, never()).warn(contains("Holesky is deprecated and will be shutdown"));
   }
 
+  @Test
+  public void holeskyTargetGasLimitIsSetToHoleskyDefaultWhenNoValueSpecified() {
+    parseCommand("--network", "holesky");
+
+    final ArgumentCaptor<EthNetworkConfig> networkArg =
+        ArgumentCaptor.forClass(EthNetworkConfig.class);
+
+    final ArgumentCaptor<MiningConfiguration> miningArg =
+        ArgumentCaptor.forClass(MiningConfiguration.class);
+
+    verify(mockControllerBuilderFactory).fromEthNetworkConfig(networkArg.capture(), any());
+    verify(mockControllerBuilder).miningParameters(miningArg.capture());
+    verify(mockControllerBuilder).build();
+
+    assertThat(networkArg.getValue()).isEqualTo(EthNetworkConfig.getNetworkConfig(HOLESKY));
+
+    assertThat(miningArg.getValue().getCoinbase()).isEqualTo(Optional.empty());
+    assertThat(miningArg.getValue().getMinTransactionGasPrice()).isEqualTo(Wei.of(1000));
+    assertThat(miningArg.getValue().getExtraData()).isEqualTo(Bytes.EMPTY);
+    assertThat(miningArg.getValue().getTargetGasLimit().getAsLong())
+        .isEqualTo(MiningConfiguration.DEFAULT_TARGET_GAS_LIMIT_HOLESKY);
+
+    assertThat(commandOutput.toString(UTF_8)).isEmpty();
+    assertThat(commandErrorOutput.toString(UTF_8)).isEmpty();
+  }
+
+  @Test
+  public void holeskyTargetGasLimitIsSetToSpecifiedValueWhenValueSpecified() {
+    long customGasLimit = 99000000;
+    parseCommand("--network", "holesky", "--target-gas-limit", String.valueOf(customGasLimit));
+
+    final ArgumentCaptor<EthNetworkConfig> networkArg =
+        ArgumentCaptor.forClass(EthNetworkConfig.class);
+
+    final ArgumentCaptor<MiningConfiguration> miningArg =
+        ArgumentCaptor.forClass(MiningConfiguration.class);
+
+    verify(mockControllerBuilderFactory).fromEthNetworkConfig(networkArg.capture(), any());
+    verify(mockControllerBuilder).miningParameters(miningArg.capture());
+    verify(mockControllerBuilder).build();
+
+    assertThat(networkArg.getValue()).isEqualTo(EthNetworkConfig.getNetworkConfig(HOLESKY));
+
+    assertThat(miningArg.getValue().getCoinbase()).isEqualTo(Optional.empty());
+    assertThat(miningArg.getValue().getMinTransactionGasPrice()).isEqualTo(Wei.of(1000));
+    assertThat(miningArg.getValue().getExtraData()).isEqualTo(Bytes.EMPTY);
+    assertThat(miningArg.getValue().getTargetGasLimit().getAsLong()).isEqualTo(customGasLimit);
+
+    assertThat(commandOutput.toString(UTF_8)).isEmpty();
+    assertThat(commandErrorOutput.toString(UTF_8)).isEmpty();
+  }
+
   @Test
   public void luksoValuesAreUsed() {
     parseCommand("--network", "lukso");

ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/MiningConfiguration.java

@@ -35,6 +35,7 @@
 @Value.Immutable
 @Value.Enclosing
 public abstract class MiningConfiguration {
+  public static final long DEFAULT_TARGET_GAS_LIMIT_HOLESKY = 36_000_000L;
   public static final PositiveNumber DEFAULT_NON_POA_BLOCK_TXS_SELECTION_MAX_TIME =
       PositiveNumber.fromInt((int) Duration.ofSeconds(5).toMillis());
   public static final PositiveNumber DEFAULT_POA_BLOCK_TXS_SELECTION_MAX_TIME =