From ef12c2184d926eea25cc804a75bc4068f9f81891 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Thu, 22 Mar 2012 04:59:59 +0100
Subject: [PATCH] Check minversion before loading the rest of the wallet

When a 0.6 wallet with compressed pubkeys is created, it writes a
minversion record to prevent older clients from reading it. If the 0.5
loading it sees a key record before seeing the minversion record however,
it will fail with DB_CORRUPT instead of DB_TOO_NEW.
---
 src/db.cpp | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/db.cpp b/src/db.cpp
index 0344c796..f6cabda2 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -771,6 +771,14 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
     //// todo: shouldn't we catch exceptions and try to recover and continue?
     CRITICAL_BLOCK(pwallet->cs_wallet)
     {
+        int nMinVersion = 0;
+        if (Read((string)"minversion", nMinVersion))
+        {
+            if (nMinVersion > CLIENT_VERSION)
+                return DB_TOO_NEW;
+            pwallet->LoadMinVersion(nMinVersion);
+        }
+
         // Get cursor
         Dbc* pcursor = GetCursor();
         if (!pcursor)
@@ -940,14 +948,6 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
                 if (nFileVersion == 10300)
                     nFileVersion = 300;
             }
-            else if (strType == "minversion")
-            {
-                int nMinVersion = 0;
-                ssValue >> nMinVersion;
-                if (nMinVersion > CLIENT_VERSION)
-                    return DB_TOO_NEW;
-                pwallet->LoadMinVersion(nMinVersion);
-            }
             else if (strType == "cscript")
             {
                 uint160 hash;