diff --git a/src/Ledger.h b/src/Ledger.h
index 3c799ab1dc..f830124e22 100644
--- a/src/Ledger.h
+++ b/src/Ledger.h
@@ -167,12 +167,12 @@ public:
 
 	// next/prev function
 	SLE::pointer getSLE(const uint256& uHash);
-	uint256 getFirstLedgerID();
-	uint256 getLastLedgerID();
-	uint256 getNextLedgerID(const uint256& uHash);							// first node >hash
-	uint256 getNextLedgerID(const uint256& uHash, const uint256& uEnd);		// first node >hash, <end
-	uint256 getPrevLedgerID(const uint256& uHash);							// last node <hash
-	uint256 getPrevLedgerID(const uint256& uHash, const uint256& uBegin);	// last node <hash, >begin
+	uint256 getFirstLedgerIndex();
+	uint256 getLastLedgerIndex();
+	uint256 getNextLedgerIndex(const uint256& uHash);							// first node >hash
+	uint256 getNextLedgerIndex(const uint256& uHash, const uint256& uEnd);		// first node >hash, <end
+	uint256 getPrevLedgerIndex(const uint256& uHash);							// last node <hash
+	uint256 getPrevLedgerIndex(const uint256& uHash, const uint256& uBegin);	// last node <hash, >begin
 
 	// index calculation functions
 	static uint256 getAccountRootIndex(const uint160& uAccountID);
diff --git a/src/LedgerNode.cpp b/src/LedgerNode.cpp
index c04b6715a2..bbb4b7e969 100644
--- a/src/LedgerNode.cpp
+++ b/src/LedgerNode.cpp
@@ -53,25 +53,25 @@ SLE::pointer Ledger::getSLE(const uint256& uHash)
 	return boost::make_shared<SLE>(node->peekSerializer(), node->getTag());
 }
 
-uint256 Ledger::getFirstLedgerID()
+uint256 Ledger::getFirstLedgerIndex()
 {
 	SHAMapItem::pointer node = mAccountStateMap->peekFirstItem();
 	return node ? node->getTag() : uint256();
 }
 
-uint256 Ledger::getLastLedgerID()
+uint256 Ledger::getLastLedgerIndex()
 {
 	SHAMapItem::pointer node = mAccountStateMap->peekLastItem();
 	return node ? node->getTag() : uint256();
 }
 
-uint256 Ledger::getNextLedgerID(const uint256& uHash)
+uint256 Ledger::getNextLedgerIndex(const uint256& uHash)
 {
 	SHAMapItem::pointer node = mAccountStateMap->peekNextItem(uHash);
 	return node ? node->getTag() : uint256();
 }
 
-uint256 Ledger::getNextLedgerID(const uint256& uHash, const uint256& uEnd)
+uint256 Ledger::getNextLedgerIndex(const uint256& uHash, const uint256& uEnd)
 {
 	SHAMapItem::pointer node = mAccountStateMap->peekNextItem(uHash);
 	if ((!node) || (node->getTag() > uEnd))
@@ -79,13 +79,13 @@ uint256 Ledger::getNextLedgerID(const uint256& uHash, const uint256& uEnd)
 	return node->getTag();
 }
 
-uint256 Ledger::getPrevLedgerID(const uint256& uHash)
+uint256 Ledger::getPrevLedgerIndex(const uint256& uHash)
 {
 	SHAMapItem::pointer node = mAccountStateMap->peekPrevItem(uHash);
 	return node ? node->getTag() : uint256();
 }
 
-uint256 Ledger::getPrevLedgerID(const uint256& uHash, const uint256& uBegin)
+uint256 Ledger::getPrevLedgerIndex(const uint256& uHash, const uint256& uBegin)
 {
 	SHAMapItem::pointer node = mAccountStateMap->peekNextItem(uHash);
 	if ((!node) || (node->getTag() < uBegin))