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diff --git a/OpenSim/Region/Framework/Interfaces/IFriendsModule.cs b/OpenSim/Region/Framework/Interfaces/IFriendsModule.cs
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+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System.Collections.Generic;
+using OpenMetaverse;
+using OpenSim.Framework;
+using FriendInfo = OpenSim.Services.Interfaces.FriendInfo;
+
+namespace OpenSim.Region.Framework.Interfaces
+{
+    public interface IFriendsModule
+    {
+        /// <summary>
+        /// Are friends cached on this simulator for a particular user?
+        /// </summary>
+        /// <param name="userID"></param>
+        /// <returns></returns>
+        bool AreFriendsCached(UUID userID);
+
+        /// <summary>
+        /// Get friends from local cache only
+        /// </summary>
+        /// <param name="userID"></param>
+        /// <returns>
+        /// An empty array if the user has no friends or friends have not been cached.
+        /// </returns>
+        FriendInfo[] GetFriendsFromCache(UUID userID);
+
+        /// <summary>
+        /// Add a friendship between two users.
+        /// </summary>
+        /// <remarks>
+        /// Ultimately, it would be more useful to take in a user account here rather than having to have a user
+        /// present in the scene.
+        /// </remarks>
+        /// <param name="client"></param>
+        /// <param name="friendID"></param>
+        void AddFriendship(IClientAPI client, UUID friendID);
+
+        /// <summary>
+        /// Remove a friendship between two users.
+        /// </summary>
+        /// <remarks>
+        /// Ultimately, it would be more useful to take in a user account here rather than having to have a user
+        /// present in the scene.
+        /// </remarks>
+        /// <param name="client"></param>
+        /// <param name="exFriendID"></param>
+        void RemoveFriendship(IClientAPI client, UUID exFriendID);
+
+        /// <summary>
+        /// Get permissions granted by a friend.
+        /// </summary>
+        /// <param name="userID">The user.</param>
+        /// <param name="friendID">The friend that granted.</param>
+        /// <returns>The permissions.  These come from the FriendRights enum.</returns>
+        int GetRightsGrantedByFriend(UUID userID, UUID friendID);
+
+        /// <summary>
+        /// Grant permissions for a friend.
+        /// </summary>
+        /// <remarks>
+        /// This includes giving them the ability to see when the user is online and permission to edit the user's
+        /// objects.
+        /// Granting lower permissions than the friend currently has will rescind the extra permissions.
+        /// </remarks>
+        /// <param name="remoteClient">The user granting the permissions.</param>
+        /// <param name="friendID">The friend.</param>
+        /// <param name="perms">These come from the FriendRights enum.</param>
+        void GrantRights(IClientAPI remoteClient, UUID friendID, int perms);
+
+        bool SendFriendsOnlineIfNeeded(IClientAPI client);
+    }
+}
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