Remove Berlin Feature Flag (#1898)

Signed-off-by: Ratan Rai Sur <ratan.r.sur@gmail.com>

CHANGELOG.md

@@ -15,6 +15,10 @@
 - [Fast sync when running Besu on cloud providers](KNOWN_ISSUES.md#fast-sync-when-running-besu-on-cloud-providers)
 - [Privacy users with private transactions created using v1.3.4 or earlier](KNOWN_ISSUES.md#privacy-users-with-private-transactions-created-using-v134-or-earlier)
 
+## 21.1.0-RC2
+### Additions and Improvements
+* Support for the Berlin Network Upgrade, although the block number must be set manually with `--override-genesis-config=berlinBlock=<blocknumber>`. This is because the block numbers haven't been determined yet. The next release will include the number in the genesis file so it will support Berlin with no intervention. [\#1898](https://github.com/hyperledger/besu/pull/1898)
+
 ## 21.1.0-RC1
 
 ### 21.1.0 Breaking Changes

config/src/main/java/org/hyperledger/besu/config/JsonGenesisConfigOptions.java

@@ -226,19 +226,16 @@ public class JsonGenesisConfigOptions implements GenesisConfigOptions {
 
   @Override
   public OptionalLong getBerlinBlockNumber() {
-    if (ExperimentalEIPs.berlinEnabled) {
-      final OptionalLong berlinBlock = getOptionalLong("berlinblock");
-      final OptionalLong yolov3Block = getOptionalLong("yolov3block");
-      if (yolov3Block.isPresent()) {
-        if (berlinBlock.isPresent()) {
-          throw new RuntimeException(
-              "Genesis files cannot specify both berlinblock and yoloV2Block.");
-        }
-        return yolov3Block;
+    final OptionalLong berlinBlock = getOptionalLong("berlinblock");
+    final OptionalLong yolov3Block = getOptionalLong("yolov3block");
+    if (yolov3Block.isPresent()) {
+      if (berlinBlock.isPresent()) {
+        throw new RuntimeException(
+            "Genesis files cannot specify both berlinblock and yoloV2Block.");
       }
-      return berlinBlock;
+      return yolov3Block;
     }
-    return OptionalLong.empty();
+    return berlinBlock;
   }
 
   @Override

config/src/main/java/org/hyperledger/besu/config/StubGenesisConfigOptions.java

@@ -151,7 +151,7 @@ public class StubGenesisConfigOptions implements GenesisConfigOptions {
 
   @Override
   public OptionalLong getBerlinBlockNumber() {
-    return ExperimentalEIPs.berlinEnabled ? berlinBlockNumber : OptionalLong.empty();
+    return berlinBlockNumber;
   }
 
   @Override

config/src/main/java/org/hyperledger/besu/config/experimental/ExperimentalEIPs.java

@@ -31,16 +31,6 @@ public class ExperimentalEIPs {
       arity = "1")
   public static boolean eip1559Enabled = EIP1559_ENABLED_DEFAULT_VALUE;
 
-  // To make it easier for tests to reset the value to default
-  public static final boolean BERLIN_ENABLED_DEFAULT_VALUE = false;
-
-  @Option(
-      hidden = true,
-      names = {"--Xberlin-enabled"},
-      description = "Enable non-finalized Berlin features (default: ${DEFAULT-VALUE})",
-      arity = "1")
-  public static boolean berlinEnabled = BERLIN_ENABLED_DEFAULT_VALUE;
-
   public static void eip1559MustBeEnabled() {
     if (!eip1559Enabled) {
       throw new RuntimeException("EIP-1559 feature flag must be enabled --Xeip1559-enabled");

config/src/test/java/org/hyperledger/besu/config/GenesisConfigOptionsTest.java

@@ -163,24 +163,14 @@ public class GenesisConfigOptionsTest {
 
   @Test
   public void shouldGetBerlinBlockNumber() {
-    try {
-      ExperimentalEIPs.berlinEnabled = true;
-      final GenesisConfigOptions config = fromConfigOptions(singletonMap("berlinBlock", 1000));
-      assertThat(config.getBerlinBlockNumber()).hasValue(1000);
-    } finally {
-      ExperimentalEIPs.berlinEnabled = ExperimentalEIPs.BERLIN_ENABLED_DEFAULT_VALUE;
-    }
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("berlinBlock", 1000));
+    assertThat(config.getBerlinBlockNumber()).hasValue(1000);
   }
 
   @Test
-  public void shouldGetYoloV2BlockNumber() {
-    try {
-      ExperimentalEIPs.berlinEnabled = true;
-      final GenesisConfigOptions config = fromConfigOptions(singletonMap("yoloV3Block", 1000));
-      assertThat(config.getBerlinBlockNumber()).hasValue(1000);
-    } finally {
-      ExperimentalEIPs.berlinEnabled = ExperimentalEIPs.BERLIN_ENABLED_DEFAULT_VALUE;
-    }
+  public void shouldGetYoloV3BlockNumber() {
+    final GenesisConfigOptions config = fromConfigOptions(singletonMap("yoloV3Block", 1000));
+    assertThat(config.getBerlinBlockNumber()).hasValue(1000);
   }
 
   @Test

ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/MainnetProtocolSpecs.java

@@ -412,9 +412,6 @@ public abstract class MainnetProtocolSpecs {
       final OptionalInt configStackSizeLimit,
       final boolean enableRevertReason,
       final boolean quorumCompatibilityMode) {
-    if (!ExperimentalEIPs.berlinEnabled) {
-      throw new RuntimeException("Berlin feature flag must be enabled --Xberlin-enabled");
-    }
     return muirGlacierDefinition(
             chainId,
             contractSizeLimit,

ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/ProtocolScheduleBuilder.java

@@ -188,17 +188,15 @@ public class ProtocolScheduleBuilder {
             isRevertReasonEnabled,
             quorumCompatibilityMode));
 
-    if (ExperimentalEIPs.berlinEnabled) {
-      addProtocolSpec(
-          protocolSchedule,
-          config.getBerlinBlockNumber(),
-          MainnetProtocolSpecs.berlinDefinition(
-              chainId,
-              config.getContractSizeLimit(),
-              config.getEvmStackSize(),
-              isRevertReasonEnabled,
-              quorumCompatibilityMode));
-    }
+    addProtocolSpec(
+        protocolSchedule,
+        config.getBerlinBlockNumber(),
+        MainnetProtocolSpecs.berlinDefinition(
+            chainId,
+            config.getContractSizeLimit(),
+            config.getEvmStackSize(),
+            isRevertReasonEnabled,
+            quorumCompatibilityMode));
 
     if (ExperimentalEIPs.eip1559Enabled) {
       final Optional<TransactionPriceCalculator> transactionPriceCalculator =
@@ -366,9 +364,7 @@ public class ProtocolScheduleBuilder {
     lastForkBlock = validateForkOrder("Istanbul", config.getIstanbulBlockNumber(), lastForkBlock);
     lastForkBlock =
         validateForkOrder("MuirGlacier", config.getMuirGlacierBlockNumber(), lastForkBlock);
-    if (ExperimentalEIPs.berlinEnabled) {
-      lastForkBlock = validateForkOrder("Berlin", config.getBerlinBlockNumber(), lastForkBlock);
-    }
+    lastForkBlock = validateForkOrder("Berlin", config.getBerlinBlockNumber(), lastForkBlock);
     assert (lastForkBlock >= 0);
   }
 

ethereum/core/src/test/java/org/hyperledger/besu/ethereum/vm/BlockchainReferenceTestTools.java

@@ -16,7 +16,6 @@ package org.hyperledger.besu.ethereum.vm;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.hyperledger.besu.config.experimental.ExperimentalEIPs;
 import org.hyperledger.besu.ethereum.ProtocolContext;
 import org.hyperledger.besu.ethereum.chain.MutableBlockchain;
 import org.hyperledger.besu.ethereum.core.Block;
@@ -79,10 +78,7 @@ public class BlockchainReferenceTestTools {
     // Don't do time consuming tests
     params.ignore("CALLBlake2f_MaxRounds.*");
 
-    // Berlin isn't finalized
-    if (!ExperimentalEIPs.berlinEnabled) {
-      params.ignore(".*[_-]Berlin");
-    }
+    params.ignore(".*[_-]Berlin");
   }
 
   public static Collection<Object[]> generateTestParametersForConfig(final String[] filePath) {

ethereum/core/src/test/java/org/hyperledger/besu/ethereum/vm/GeneralStateReferenceTestTools.java

@@ -16,7 +16,6 @@ package org.hyperledger.besu.ethereum.vm;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.hyperledger.besu.config.experimental.ExperimentalEIPs;
 import org.hyperledger.besu.ethereum.core.Account;
 import org.hyperledger.besu.ethereum.core.BlockHeader;
 import org.hyperledger.besu.ethereum.core.Hash;
@@ -103,10 +102,7 @@ public class GeneralStateReferenceTestTools {
     // Don't do time consuming tests
     params.ignore("CALLBlake2f_MaxRounds.*");
 
-    // Berlin isn't finalized
-    if (!ExperimentalEIPs.berlinEnabled) {
-      params.ignore(".*[_-]Berlin");
-    }
+    params.ignore(".*[_-]Berlin");
   }
 
   public static Collection<Object[]> generateTestParametersForConfig(final String[] filePath) {

ethereum/referencetests/src/main/java/org/hyperledger/besu/ethereum/referencetests/ReferenceTestProtocolSchedules.java

@@ -17,7 +17,6 @@ package org.hyperledger.besu.ethereum.referencetests;
 
 import org.hyperledger.besu.config.GenesisConfigOptions;
 import org.hyperledger.besu.config.StubGenesisConfigOptions;
-import org.hyperledger.besu.config.experimental.ExperimentalEIPs;
 import org.hyperledger.besu.ethereum.core.PrivacyParameters;
 import org.hyperledger.besu.ethereum.mainnet.ProtocolSchedule;
 import org.hyperledger.besu.ethereum.mainnet.ProtocolScheduleBuilder;
@@ -62,10 +61,8 @@ public class ReferenceTestProtocolSchedules {
     builder.put("Petersburg", createSchedule(new StubGenesisConfigOptions().petersburgBlock(0)));
     builder.put("Istanbul", createSchedule(new StubGenesisConfigOptions().istanbulBlock(0)));
     builder.put("MuirGlacier", createSchedule(new StubGenesisConfigOptions().muirGlacierBlock(0)));
-    if (ExperimentalEIPs.berlinEnabled) {
-      builder.put("Berlin", createSchedule(new StubGenesisConfigOptions().berlinBlock(0)));
-      builder.put("YOLOv3", createSchedule(new StubGenesisConfigOptions().berlinBlock(0)));
-    }
+    builder.put("Berlin", createSchedule(new StubGenesisConfigOptions().berlinBlock(0)));
+    builder.put("YOLOv3", createSchedule(new StubGenesisConfigOptions().berlinBlock(0)));
     return new ReferenceTestProtocolSchedules(builder.build());
   }