From 48c3fcbed30c10ef75297659012ab036bceaca30 Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Sat, 14 Jul 2018 23:48:09 -1100
Subject: [PATCH] Snapshot() reverse iterator

---
 src/txdb.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/txdb.cpp b/src/txdb.cpp
index a0f764962..ae15d37e1 100644
--- a/src/txdb.cpp
+++ b/src/txdb.cpp
@@ -402,7 +402,7 @@ int64_t CBlockTreeDB::Snapshot()
 {
     char chType; int64_t total = -1; std::string address;
     boost::scoped_ptr<leveldb::Iterator> pcursor(NewIterator());
-    pcursor->SeekToFirst();
+    pcursor->SeekToLast();
     fprintf(stderr,"pcursor iterate\n");
     while (pcursor->Valid())
     {
@@ -428,7 +428,7 @@ int64_t CBlockTreeDB::Snapshot()
                         total = (int64_t)nValue;
                     else total += (int64_t)nValue;
                     //addressIndex.push_back(make_pair(indexKey, nValue));
-                    pcursor->Next();
+                    pcursor->Prev();
                 } catch (const std::exception& e) {
                     return error("failed to get address index value");
                 }