Fix ByHash json parsing

Signed-off-by: Simon Dudley <simon.dudley@consensys.net>

ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineGetPayloadBodiesByHashV1.java

@@ -27,6 +27,7 @@ import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.BlockResultFac
 import org.hyperledger.besu.ethereum.chain.Blockchain;
 
 import java.util.Arrays;
+import java.util.List;
 import java.util.stream.Collectors;
 
 import io.vertx.core.Vertx;
@@ -55,7 +56,10 @@ public class EngineGetPayloadBodiesByHashV1 extends ExecutionEngineJsonRpcMethod
   public JsonRpcResponse syncResponse(final JsonRpcRequestContext request) {
     engineCallListener.executionEngineCalled();
 
-    final Hash[] blockHashes = request.getRequiredParameter(0, Hash[].class);
+    final List<Hash> blockHashes =
+        Arrays.stream(request.getRequest().getParams())
+            .map(Hash.class::cast)
+            .collect(Collectors.toList());
 
     traceLambda(LOG, "{} parameters: blockHashes {}", () -> getName(), () -> blockHashes);
 
@@ -63,6 +67,6 @@ public class EngineGetPayloadBodiesByHashV1 extends ExecutionEngineJsonRpcMethod
     return new JsonRpcSuccessResponse(
         request.getRequest().getId(),
         blockResultFactory.payloadBodiesCompleteV1(
-            Arrays.stream(blockHashes).map(blockchain::getBlockBody).collect(Collectors.toList())));
+            blockHashes.stream().map(blockchain::getBlockBody).collect(Collectors.toList())));
   }
 }

ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineGetPayloadBodiesByHashV1Test.java

@@ -224,9 +224,7 @@ public class EngineGetPayloadBodiesByHashV1Test {
     return method.response(
         new JsonRpcRequestContext(
             new JsonRpcRequest(
-                "2.0",
-                RpcMethod.ENGINE_GET_PAYLOAD_BODIES_BY_HASH_V1.getMethodName(),
-                new Object[] {hashes})));
+                "2.0", RpcMethod.ENGINE_GET_PAYLOAD_BODIES_BY_HASH_V1.getMethodName(), hashes)));
   }
 
   private EngineGetPayloadBodiesResultV1 fromSuccessResp(final JsonRpcResponse resp) {