diff --git a/src/LedgerEntrySet.cpp b/src/LedgerEntrySet.cpp
index 3ec82c343c..b07c9ec0ee 100644
--- a/src/LedgerEntrySet.cpp
+++ b/src/LedgerEntrySet.cpp
@@ -1,5 +1,7 @@
 #include "LedgerEntrySet.h"
 
+#include <boost/make_shared.hpp>
+
 LedgerEntrySet LedgerEntrySet::duplicate()
 {
 	return LedgerEntrySet(mEntries, mSeq + 1);
@@ -17,5 +19,73 @@ void LedgerEntrySet::swapWith(LedgerEntrySet& e)
 	mEntries.swap(e.mEntries);
 }
 
+SLE::pointer LedgerEntrySet::getEntry(const uint256& index, LedgerEntryAction& action)
+{
+	boost::unordered_map<uint256, LedgerEntrySetEntry>::iterator it = mEntries.find(index);
+	if (it == mEntries.end())
+	{
+		action = taaNONE;
+		return SLE::pointer();
+	}
+	if (it->second.mSeq != mSeq)
+	{
+		it->second.mEntry = boost::make_shared<SerializedLedgerEntry>(*it->second.mEntry);
+		it->second.mSeq = mSeq;
+	}
+	action = it->second.mAction;
+	return it->second.mEntry;
+}
 
+LedgerEntryAction LedgerEntrySet::hasEntry(const uint256& index) const
+{
+	boost::unordered_map<uint256, LedgerEntrySetEntry>::const_iterator it = mEntries.find(index);
+	if (it == mEntries.end())
+		return taaNONE;
+	return it->second.mAction;
+}
 
+void LedgerEntrySet::entryCache(SLE::pointer sle)
+{
+	boost::unordered_map<uint256, LedgerEntrySetEntry>::iterator it = mEntries.find(sle->getIndex());
+	if (it == mEntries.end())
+		mEntries.insert(std::make_pair(sle->getIndex(), LedgerEntrySetEntry(sle, taaCACHED, mSeq)));
+	else if (it->second.mAction == taaCACHED)
+	{
+		it->second.mSeq = mSeq;
+		it->second.mEntry = sle;
+	}
+	else
+		throw std::runtime_error("Cache after modify/delete");
+}
+
+void LedgerEntrySet::entryCreate(SLE::pointer sle)
+{
+	boost::unordered_map<uint256, LedgerEntrySetEntry>::iterator it = mEntries.find(sle->getIndex());
+	if (it == mEntries.end())
+		mEntries.insert(std::make_pair(sle->getIndex(), LedgerEntrySetEntry(sle, taaDELETE, mSeq)));
+	else if (it->second.mAction == taaDELETE)
+		throw std::runtime_error("Create after delete");
+	else if (it->second.mAction == taaMODIFY)
+		throw std::runtime_error("Create after modify");
+	else
+	{
+		it->second.mSeq = mSeq;
+		it->second.mEntry = sle;
+		it->second.mAction = taaDELETE;
+	}
+}
+
+void LedgerEntrySet::entryModify(SLE::pointer sle)
+{
+	boost::unordered_map<uint256, LedgerEntrySetEntry>::iterator it = mEntries.find(sle->getIndex());
+	if (it == mEntries.end())
+		mEntries.insert(std::make_pair(sle->getIndex(), LedgerEntrySetEntry(sle, taaMODIFY, mSeq)));
+	else if (it->second.mAction == taaDELETE)
+		throw std::runtime_error("Modify after delete");
+	else
+	{
+		it->second.mSeq = mSeq;
+		it->second.mEntry = sle;
+		it->second.mAction = (it->second.mAction == taaCREATE) ? taaCREATE : taaDELETE;
+	}
+}
diff --git a/src/LedgerEntrySet.h b/src/LedgerEntrySet.h
index d38603b5a7..04ec8d70dd 100644
--- a/src/LedgerEntrySet.h
+++ b/src/LedgerEntrySet.h
@@ -21,6 +21,8 @@ public:
 	SLE::pointer		mEntry;
 	LedgerEntryAction	mAction;
 	int					mSeq;
+
+	LedgerEntrySetEntry(SLE::pointer e, LedgerEntryAction a, int s) : mEntry(e), mAction(a), mSeq(s) { ; }
 };