Add debug_getRawTransaction (#5635)

* Add debug_getRawTransaction

Signed-off-by: Gabriel Fukushima <gabrielfukushima@gmail.com>

* Add changelog entry

Signed-off-by: Gabriel Fukushima <gabrielfukushima@gmail.com>

---------

Signed-off-by: Gabriel Fukushima <gabrielfukushima@gmail.com>

CHANGELOG.md

@@ -28,6 +28,7 @@ and in case a rollback is needed, before installing a previous version, the migr
 - Remove PoW validation if merge is enabled as it is not needed any more [#5538](https://github.com/hyperledger/besu/pull/5538)
 - Use BlobDB for blockchain storage to reduce initial sync time and write amplification [#5475](https://github.com/hyperledger/besu/pull/5475)
 - Add healing flat db mechanism with early access CLI options `--Xsnapsync-synchronizer-flat-db-healing-enabled=true` [#5319](https://github.com/hyperledger/besu/pull/5319)
+- Add debug_getRawTransaction method to the DEBUG suite [#5635](https://github.com/hyperledger/besu/pull/5635)
 
 ### Bug Fixes
 - Fix backwards sync bug where chain is rolled back too far, especially when restarting Nimbus [#5497](https://github.com/hyperledger/besu/pull/5497)

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

@@ -49,6 +49,7 @@ public enum RpcMethod {
   DEBUG_GET_RAW_HEADER("debug_getRawHeader"),
   DEBUG_GET_RAW_BLOCK("debug_getRawBlock"),
   DEBUG_GET_RAW_RECEIPTS("debug_getRawReceipts"),
+  DEBUG_GET_RAW_TRANSACTION("debug_getRawTransaction"),
   ENGINE_GET_PAYLOAD_V1("engine_getPayloadV1"),
   ENGINE_GET_PAYLOAD_V2("engine_getPayloadV2"),
   ENGINE_NEW_PAYLOAD_V1("engine_newPayloadV1"),

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

@@ -0,0 +1,57 @@
+/*
+ * Copyright Hyperledger Besu Contributors.
+ *
+ * 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;
+
+import org.hyperledger.besu.datatypes.Hash;
+import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcResponse;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
+import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
+import org.hyperledger.besu.ethereum.core.Transaction;
+import org.hyperledger.besu.ethereum.rlp.BytesValueRLPOutput;
+
+public class DebugGetRawTransaction implements JsonRpcMethod {
+
+  protected final BlockchainQueries blockchainQueries;
+
+  public DebugGetRawTransaction(final BlockchainQueries blockchainQueries) {
+    this.blockchainQueries = blockchainQueries;
+  }
+
+  @Override
+  public String getName() {
+    return RpcMethod.DEBUG_GET_RAW_TRANSACTION.getMethodName();
+  }
+
+  @Override
+  public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
+    final Hash txHash = requestContext.getRequiredParameter(0, Hash.class);
+
+    return blockchainQueries
+        .transactionByHash(txHash)
+        .map(
+            tx ->
+                new JsonRpcSuccessResponse(
+                    requestContext.getRequest().getId(), toRawString(tx.getTransaction())))
+        .orElse(new JsonRpcSuccessResponse(requestContext.getRequest().getId(), null));
+  }
+
+  private String toRawString(final Transaction transaction) {
+    final BytesValueRLPOutput out = new BytesValueRLPOutput();
+    transaction.writeTo(out);
+    return out.encoded().toHexString();
+  }
+}

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/DebugJsonRpcMethods.java

@@ -24,6 +24,7 @@ import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugGetBadBlo
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugGetRawBlock;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugGetRawHeader;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugGetRawReceipts;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugGetRawTransaction;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugMetrics;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugResyncWorldstate;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.DebugSetHead;
@@ -111,6 +112,7 @@ public class DebugJsonRpcMethods extends ApiGroupJsonRpcMethods {
         new DebugAccountAt(blockchainQueries, () -> new BlockTracer(blockReplay)),
         new DebugGetRawHeader(blockchainQueries),
         new DebugGetRawBlock(blockchainQueries),
-        new DebugGetRawReceipts(blockchainQueries));
+        new DebugGetRawReceipts(blockchainQueries),
+        new DebugGetRawTransaction(blockchainQueries));
   }
 }