implement testing_buildBlockV1

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/RpcMethod.java

@@ -176,7 +176,8 @@ public enum RpcMethod {
   TX_POOL_BESU_PENDING_TRANSACTIONS("txpool_besuPendingTransactions"),
   WEB3_CLIENT_VERSION("web3_clientVersion"),
   WEB3_SHA3("web3_sha3"),
-  PLUGINS_RELOAD_CONFIG("plugins_reloadPluginConfig");
+  PLUGINS_RELOAD_CONFIG("plugins_reloadPluginConfig"),
+  TESTING_BUILD_BLOCK_V1("testing_buildBlockV1");
 
   private final String methodName;
 

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/testing/TestingBlockCreator.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright contributors to 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.ethereum.api.jsonrpc.internal.methods.testing;
+
+import org.hyperledger.besu.datatypes.Address;
+import org.hyperledger.besu.ethereum.ProtocolContext;
+import org.hyperledger.besu.ethereum.blockcreation.AbstractBlockCreator;
+import org.hyperledger.besu.ethereum.core.BlockHeader;
+import org.hyperledger.besu.ethereum.core.BlockHeaderBuilder;
+import org.hyperledger.besu.ethereum.core.Difficulty;
+import org.hyperledger.besu.ethereum.core.MiningConfiguration;
+import org.hyperledger.besu.ethereum.core.SealableBlockHeader;
+import org.hyperledger.besu.ethereum.core.Transaction;
+import org.hyperledger.besu.ethereum.core.Withdrawal;
+import org.hyperledger.besu.ethereum.eth.manager.EthScheduler;
+import org.hyperledger.besu.ethereum.eth.transactions.TransactionPool;
+import org.hyperledger.besu.ethereum.mainnet.ProtocolSchedule;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+
+import org.apache.tuweni.bytes.Bytes;
+import org.apache.tuweni.bytes.Bytes32;
+
+/**
+ * A block creator for testing purposes that only includes the provided transactions and does not
+ * use the local transaction pool. When explicit transactions are provided, the
+ * AbstractBlockCreator's evaluateTransactions method is used instead of
+ * buildTransactionListForBlock, which means the transaction pool is not queried for additional
+ * transactions.
+ */
+class TestingBlockCreator extends AbstractBlockCreator {
+
+  public TestingBlockCreator(
+      final MiningConfiguration miningConfiguration,
+      final Address coinbase,
+      final Bytes extraData,
+      final TransactionPool transactionPool,
+      final ProtocolContext protocolContext,
+      final ProtocolSchedule protocolSchedule,
+      final EthScheduler ethScheduler) {
+    super(
+        miningConfiguration,
+        (__, ___) -> coinbase,
+        parent -> extraData,
+        transactionPool,
+        protocolContext,
+        protocolSchedule,
+        ethScheduler);
+  }
+
+  public BlockCreationResult createBlock(
+      final Optional<List<Transaction>> maybeTransactions,
+      final Bytes32 random,
+      final long timestamp,
+      final Optional<List<Withdrawal>> withdrawals,
+      final Optional<Bytes32> parentBeaconBlockRoot,
+      final Optional<Long> slotNumber,
+      final BlockHeader parentHeader) {
+
+    return createBlock(
+        maybeTransactions,
+        Optional.of(Collections.emptyList()),
+        withdrawals,
+        Optional.of(random),
+        parentBeaconBlockRoot,
+        slotNumber,
+        timestamp,
+        false,
+        parentHeader);
+  }
+
+  @Override
+  public BlockCreationResult createBlock(
+      final Optional<List<Transaction>> maybeTransactions,
+      final Optional<List<BlockHeader>> maybeOmmers,
+      final long timestamp,
+      final BlockHeader parentHeader) {
+    throw new UnsupportedOperationException("random is required for testing block creation");
+  }
+
+  @Override
+  protected BlockHeader createFinalBlockHeader(final SealableBlockHeader sealableBlockHeader) {
+    return BlockHeaderBuilder.create()
+        .difficulty(Difficulty.ZERO)
+        .populateFrom(sealableBlockHeader)
+        .nonce(0L)
+        .blockHeaderFunctions(blockHeaderFunctions)
+        .buildBlockHeader();
+  }
+}