--- /dev/null
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/slice.h>
+#include <nan.h>
+#include <node.h>
+
+namespace grpc {
+namespace node {
+
+typedef Nan::Persistent<v8::Value, Nan::CopyablePersistentTraits<v8::Value>>
+ PersistentValue;
+
+grpc_slice CreateSliceFromString(const v8::Local<v8::String> source);
+
+grpc_slice CreateSliceFromBuffer(const v8::Local<v8::Value> source);
+
+v8::Local<v8::String> CopyStringFromSlice(const grpc_slice slice);
+
+v8::Local<v8::Value> CopyBufferFromSlice(const grpc_slice slice);
+
+} // namespace node
+} // namespace grpc