diff --git a/src/HashedObject.cpp b/src/HashedObject.cpp
index ceb7a1b2a..52f520f8a 100644
--- a/src/HashedObject.cpp
+++ b/src/HashedObject.cpp
@@ -119,4 +119,14 @@ HashedObject::pointer HashedObject::retrieve(const uint256& hash)
 	return obj;
 }
 
+HashedObjectBulkWriter::HashedObjectBulkWriter() : sl(theApp->getHashNodeDB()->getDBLock())
+{
+	theApp->getHashNodeDB()->getDB()->executeSQL("BEGIN TRANSACTION;");
+}
+
+HashedObjectBulkWriter::~HashedObjectBulkWriter()
+{
+	theApp->getHashNodeDB()->getDB()->executeSQL("END TRANSACTION;");
+}
+
 // vim:ts=4
diff --git a/src/HashedObject.h b/src/HashedObject.h
index 7234082c4..6a0fa2869 100644
--- a/src/HashedObject.h
+++ b/src/HashedObject.h
@@ -3,18 +3,17 @@
 
 #include <vector>
 
-#include <boost/shared_ptr.hpp>
-
 #include "types.h"
 #include "uint256.h"
+#include "ScopedLock.h"
 
 enum HashedObjectType
 {
-	UNKNOWN=0,
-	LEDGER=1,
-	TRANSACTION=2,
-	ACCOUNT_NODE=3,
-	TRANSACTION_NODE=4
+	UNKNOWN = 0,
+	LEDGER = 1,
+	TRANSACTION = 2,
+	ACCOUNT_NODE = 3,
+	TRANSACTION_NODE = 4
 };
 
 class HashedObject
@@ -37,10 +36,27 @@ public:
 	const std::vector<unsigned char>& getData() { return mData; }
 
 	bool store() const;
+
 	static bool store(HashedObjectType type, uint32 index, const std::vector<unsigned char>& data,
 		const uint256& hash);
 
 	static HashedObject::pointer retrieve(const uint256& hash);
 };
 
+class HashedObjectBulkWriter
+{
+protected:
+	ScopedLock sl;
+
+public:
+
+	HashedObjectBulkWriter();
+	~HashedObjectBulkWriter();
+
+	bool store(HashedObjectType type, uint32 index, const std::vector<unsigned char>& data, const uint256& hash)
+	{ return HashedObject::store(type, index, data, hash); }
+	HashedObject::pointer retrieve(const uint256& hash)
+	{ return HashedObject::retrieve(hash); }
+};
+
 #endif