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diff --git a/src/mongo/db/repl/read_after_optime_response.h b/src/mongo/db/repl/read_after_optime_response.h
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+++ b/src/mongo/db/repl/read_after_optime_response.h
@@ -0,0 +1,91 @@
+/**
+ *    Copyright (C) 2015 MongoDB Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#pragma once
+
+#include <boost/date_time/posix_time/posix_time_types.hpp>
+#include <string>
+
+#include "mongo/base/status.h"
+
+namespace mongo {
+
+    class BSONObjBuilder;
+
+namespace repl {
+
+    class ReadAfterOpTimeResponse {
+    public:
+        static const std::string kWaitedMSFieldName;
+
+        /**
+         * Constructs a default response that has OK status, and wait is false.
+         */
+        ReadAfterOpTimeResponse();
+
+        /**
+         * Constructs a response with the given status with wait equals to false.
+         */
+        explicit ReadAfterOpTimeResponse(Status status);
+
+        /**
+         * Constructs a response with wait set to true along with the given parameters.
+         */
+        ReadAfterOpTimeResponse(Status status, boost::posix_time::milliseconds duration);
+
+        /**
+         * Appends to the builder the timeout and duration info if didWait() is true.
+         * Note: does not include status.
+         */
+        void appendInfo(BSONObjBuilder* builder);
+
+        bool didWait() const;
+
+        /**
+         * Returns the amount of duration waiting for opTime to pass.
+         * Valid only if didWait is true.
+         */
+        boost::posix_time::milliseconds getDuration() const;
+
+        /**
+         * Returns more details about an error if it occurred.
+         */
+        Status getStatus() const;
+
+    private:
+        ReadAfterOpTimeResponse(Status status,
+                                boost::posix_time::milliseconds duration,
+                                bool waited);
+
+        bool _waited;
+        boost::posix_time::milliseconds _duration;
+        Status _status;
+    };
+
+} // namespace repl
+} // namespace mongo