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diff --git a/linden/indra/llmessage/lluseroperation.h b/linden/indra/llmessage/lluseroperation.h
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+/** 
+ * @file lluseroperation.h
+ * @brief LLUserOperation class header file - used for message based
+ * transaction. For example, money transactions.
+ *
+ * Copyright (c) 2002-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#ifndef LL_LLUSEROPERATION_H
+#define LL_LLUSEROPERATION_H
+
+#include "lluuid.h"
+#include "llframetimer.h"
+
+#include <map>
+
+class LLUserOperation
+{
+public:
+        LLUserOperation(const LLUUID& agent_id);
+        LLUserOperation(const LLUUID& agent_id, const LLUUID& transaction_id);
+        virtual ~LLUserOperation();
+
+        const LLUUID& getTransactionID() const { return mTransactionID; }
+        const LLUUID& getAgentID() const { return mAgentID; }
+
+        // Operation never got necessary data, so expired       
+        virtual BOOL isExpired();
+
+        // Send request to the dataserver
+        virtual void sendRequest() = 0;
+
+        // Run the operation. This will only be called in the case of an
+        // actual success or failure of the operation.
+        virtual BOOL execute(BOOL transaction_success) = 0;     
+
+        // This method is called when the user op has expired, and is
+        // about to be deleted by the manager. This gives the user op the
+        // ability to nack someone when the user op is never evaluated
+        virtual void expire();
+
+protected:
+        LLUserOperation();
+        
+protected:
+        LLUUID mAgentID;
+        LLUUID mTransactionID;
+        LLFrameTimer mTimer;
+};
+
+
+class LLUserOperationMgr
+{
+public:
+        LLUserOperationMgr();
+        ~LLUserOperationMgr();
+
+        void addOperation(LLUserOperation* op);
+        LLUserOperation* findOperation(const LLUUID& transaction_id);
+        BOOL deleteOperation(LLUserOperation* op);
+
+        // Call this method every once in a while to clean up old
+        // transactions.
+        void deleteExpiredOperations();
+        
+private:
+        typedef std::map<LLUUID, LLUserOperation*> user_operation_list_t;
+        user_operation_list_t mUserOperationList;
+        LLUUID mLastOperationConsidered;
+};
+
+extern LLUserOperationMgr* gUserOperationMgr;
+
+#endif // LL_LLUSEROPERATION_H