EIP-7840 prototype

Signed-off-by: Simon Dudley <[email protected]>

acceptance-tests/tests/src/test/resources/dev/dev_prague.json

@@ -15,6 +15,20 @@
     "terminalTotalDifficulty":0,
     "cancunTime":0,
     "pragueTime":0,
+    "blobSchedule": {
+      "cancun": {
+        "target": 3,
+        "max": 6
+      },
+      "prague": {
+        "target": 6,
+        "max": 9
+      },
+      "osaka": {
+        "target": 9,
+        "max": 12
+      }
+    },
     "clique": {
       "period": 5,
       "epoch": 30000

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

@@ -0,0 +1,101 @@
+/*
+ * Copyright contributors to Hyperledger Besu.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package org.hyperledger.besu.config;
+
+import java.util.Optional;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/** The Checkpoint config options. */
+public class BlobScheduleOptions {
+
+  /** The constant DEFAULT. */
+  public static final BlobScheduleOptions DEFAULT =
+      new BlobScheduleOptions(JsonUtil.createEmptyObjectNode());
+
+  private final ObjectNode blobScheduleOptionsConfigRoot;
+
+  private static final String CANCUN_KEY = "cancun";
+  private static final String PRAGUE_KEY = "prague";
+  private static final String OSAKA_KEY = "osaka";
+
+  /**
+   * Instantiates a new Blob Schedule config options.
+   *
+   * @param blobScheduleConfigRoot the blob schedule config root
+   */
+  public BlobScheduleOptions(final ObjectNode blobScheduleConfigRoot) {
+    this.blobScheduleOptionsConfigRoot = blobScheduleConfigRoot;
+  }
+
+  /**
+   * Gets cancun blob schedule.
+   *
+   * @return the cancun blob schedule
+   */
+  public Optional<BlobSchedule> getCancun() {
+    return JsonUtil.getObjectNode(blobScheduleOptionsConfigRoot, CANCUN_KEY).map(BlobSchedule::new);
+  }
+
+  /**
+   * Gets prague blob schedule.
+   *
+   * @return the prague blob schedule
+   */
+  public Optional<BlobSchedule> getPrague() {
+    return JsonUtil.getObjectNode(blobScheduleOptionsConfigRoot, PRAGUE_KEY).map(BlobSchedule::new);
+  }
+
+  /**
+   * Gets osaka blob schedule.
+   *
+   * @return the osaka blob schedule
+   */
+  public Optional<BlobSchedule> getOsaka() {
+    return JsonUtil.getObjectNode(blobScheduleOptionsConfigRoot, OSAKA_KEY).map(BlobSchedule::new);
+  }
+
+  /** The Blob schedule for a particular fork. */
+  public static class BlobSchedule {
+    private final ObjectNode blobScheduleConfigRoot;
+
+    /**
+     * Instantiates a new Blob schedule.
+     *
+     * @param blobScheduleItemConfigRoot the blob schedule item config root
+     */
+    public BlobSchedule(final ObjectNode blobScheduleItemConfigRoot) {
+      this.blobScheduleConfigRoot = blobScheduleItemConfigRoot;
+    }
+
+    /**
+     * Gets target.
+     *
+     * @return the target
+     */
+    public int getTarget() {
+      return JsonUtil.getInt(blobScheduleConfigRoot, "target").orElseThrow();
+    }
+
+    /**
+     * Gets max.
+     *
+     * @return the max
+     */
+    public int getMax() {
+      return JsonUtil.getInt(blobScheduleConfigRoot, "max").orElseThrow();
+    }
+  }
+}

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

@@ -546,4 +546,11 @@ default boolean isConsensusMigration() {
    * @return the consolidation request contract address
    */
   Optional<Address> getConsolidationRequestContractAddress();
+
+  /**
+   * The blob schedule is a list of hardfork names and their associated target and max blob values.
+   *
+   * @return the blob schedule
+   */
+  BlobScheduleOptions getBlobScheduleOptions();
 }

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

@@ -47,6 +47,7 @@ public class JsonGenesisConfigOptions implements GenesisConfigOptions {
   private static final String TRANSITIONS_CONFIG_KEY = "transitions";
   private static final String DISCOVERY_CONFIG_KEY = "discovery";
   private static final String CHECKPOINT_CONFIG_KEY = "checkpoint";
+  private static final String BLOB_SCHEDULE_CONFIG_KEY = "blobschedule";
   private static final String ZERO_BASE_FEE_KEY = "zerobasefee";
   private static final String FIXED_BASE_FEE_KEY = "fixedbasefee";
   private static final String WITHDRAWAL_REQUEST_CONTRACT_ADDRESS_KEY =
@@ -199,6 +200,13 @@ public EthashConfigOptions getEthashConfigOptions() {
         .orElse(EthashConfigOptions.DEFAULT);
   }
 
+  @Override
+  public BlobScheduleOptions getBlobScheduleOptions() {
+    return JsonUtil.getObjectNode(configRoot, BLOB_SCHEDULE_CONFIG_KEY)
+        .map(BlobScheduleOptions::new)
+        .orElse(BlobScheduleOptions.DEFAULT);
+  }
+
   @Override
   public TransitionsConfigOptions getTransitions() {
     return transitions;

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

@@ -472,6 +472,11 @@ public Optional<Address> getConsolidationRequestContractAddress() {
     return Optional.empty();
   }
 
+  @Override
+  public BlobScheduleOptions getBlobScheduleOptions() {
+    return BlobScheduleOptions.DEFAULT;
+  }
+
   /**
    * Homestead block stub genesis config options.
    *

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

@@ -0,0 +1,36 @@
+/*
+ * Copyright contributors to Hyperledger Besu.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package org.hyperledger.besu.config;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+public class BlobScheduleOptionsTest {
+
+  @Test
+  public void blobScheduleIsParsed() {
+    final GenesisConfigFile genesisConfigFile =
+        GenesisConfigFile.fromResource("/mainnet_with_blob_schedule.json");
+    final GenesisConfigOptions configOptions = genesisConfigFile.getConfigOptions();
+
+    assertThat(configOptions.getBlobScheduleOptions().getCancun().get().getTarget()).isEqualTo(3);
+    assertThat(configOptions.getBlobScheduleOptions().getCancun().get().getMax()).isEqualTo(6);
+    assertThat(configOptions.getBlobScheduleOptions().getPrague().get().getTarget()).isEqualTo(6);
+    assertThat(configOptions.getBlobScheduleOptions().getPrague().get().getMax()).isEqualTo(9);
+    assertThat(configOptions.getBlobScheduleOptions().getOsaka().get().getTarget()).isEqualTo(9);
+    assertThat(configOptions.getBlobScheduleOptions().getOsaka().get().getMax()).isEqualTo(12);
+  }
+}

config/src/test/resources/mainnet_with_blob_schedule.json

@@ -0,0 +1,37 @@
+{
+  "config": {
+    "chainId": 3151908,
+    "homesteadBlock": 0,
+    "eip150Block": 0,
+    "eip155Block": 0,
+    "eip158Block": 0,
+    "byzantiumBlock": 0,
+    "constantinopleBlock": 0,
+    "petersburgBlock": 0,
+    "istanbulBlock": 0,
+    "berlinBlock": 0,
+    "londonBlock": 0,
+    "preMergeForkBlock": 0,
+    "terminalTotalDifficulty": 0,
+    "ethash": {},
+    "shanghaiTime": 0,
+    "cancunTime": 0,
+    "blobSchedule": {
+      "cancun": {
+        "target": 3,
+        "max": 6
+      },
+      "prague": {
+        "target": 6,
+        "max": 9
+      },
+      "osaka": {
+        "target": 9,
+        "max": 12
+      }
+    },
+    "depositContractAddress": "0x4242424242424242424242424242424242424242",
+    "pragueTime": 1734106711,
+    "osakaTime": 1734107095
+  }
+}

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

@@ -17,8 +17,11 @@
 /** The GasLimitCalculator interface defines methods for calculating the gas limit. */
 public interface GasLimitCalculator {
 
-  /** The constant BLOB_GAS_LIMIT represents the gas limit for blob data. */
-  long BLOB_GAS_LIMIT = 786432;
+  /**
+   * The constant BLOB_GAS_LIMIT represents the gas limit for blob data. Defaults to the Cancun
+   * value where it was first introduced as part of EIP-4844
+   */
+  long BLOB_GAS_LIMIT = 0xC0000;
 
   /**
    * Calculates the next gas limit based on the current gas limit, target gas limit, and new block

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

@@ -15,17 +15,36 @@
 package org.hyperledger.besu.ethereum.mainnet;
 
 import org.hyperledger.besu.ethereum.mainnet.feemarket.BaseFeeMarket;
+import org.hyperledger.besu.evm.gascalculator.CancunGasCalculator;
 
 public class CancunTargetingGasLimitCalculator extends LondonTargetingGasLimitCalculator {
-  private static final long MAX_BLOB_GAS_PER_BLOCK = 786432L;
+
+  /**
+   * The constant MAX_BLOB_GAS_PER_BLOCK represents the maximum gas limit for blob data. =
+   * CancunGasCalculator.BLOB_GAS_PER_BLOB * 6 blobs = 131072 * 6 = 786432 = 0xC0000
+   */
+  private static final int DEFAULT_MAX_BLOBS_PER_BLOCK = 6;
+
+  /**
+   * The maximum gas limit for blob data per block. getBlobGasPerBlob() * 6 blobs = 131072 * 6 =
+   * 786432 = 0xC0000
+   */
+  private final long maxBlobGasPerBlock;
 
   public CancunTargetingGasLimitCalculator(
       final long londonForkBlock, final BaseFeeMarket feeMarket) {
+    this(londonForkBlock, feeMarket, DEFAULT_MAX_BLOBS_PER_BLOCK);
+  }
+
+  public CancunTargetingGasLimitCalculator(
+      final long londonForkBlock, final BaseFeeMarket feeMarket, final int maxBlobsPerBlock) {
     super(londonForkBlock, feeMarket);
+    final CancunGasCalculator cancunGasCalculator = new CancunGasCalculator();
+    this.maxBlobGasPerBlock = cancunGasCalculator.getBlobGasPerBlob() * maxBlobsPerBlock;
   }
 
   @Override
   public long currentBlobGasLimit() {
-    return MAX_BLOB_GAS_PER_BLOCK;
+    return maxBlobGasPerBlock;
   }
 }