From 865c3a23832e36d50cb873d38c976032b027b5d3 Mon Sep 17 00:00:00 2001
From: s_nakamoto <s_nakamoto@1a98c847-1fd6-4fd8-948a-caf3550aa51b>
Date: Mon, 6 Dec 2010 15:59:28 +0000
Subject: [PATCH] fix wallet.dat compatibility problem if you downgrade from
 0.3.17 and then upgrade again

git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@196 1a98c847-1fd6-4fd8-948a-caf3550aa51b
---
 db.cpp      | 24 ++++++++++++++++++++++++
 main.h      | 25 +++++++++++--------------
 serialize.h |  2 +-
 3 files changed, 36 insertions(+), 15 deletions(-)

diff --git a/db.cpp b/db.cpp
index fb4e48c596..8f02fffafa 100644
--- a/db.cpp
+++ b/db.cpp
@@ -656,6 +656,7 @@ bool CWalletDB::LoadWallet()
 {
     vchDefaultKey.clear();
     int nFileVersion = 0;
+    vector<uint256> vWalletUpgrade;
 
     // Modify defaults
 #ifndef __WXMSW__
@@ -705,6 +706,25 @@ bool CWalletDB::LoadWallet()
                 if (wtx.GetHash() != hash)
                     printf("Error in wallet.dat, hash mismatch\n");
 
+                // Undo serialize changes in 31600
+                if (31404 <= wtx.fTimeReceivedIsTxTime && wtx.fTimeReceivedIsTxTime <= 31703)
+                {
+                    if (!ssValue.empty())
+                    {
+                        char fTmp;
+                        char fUnused;
+                        ssValue >> fTmp >> fUnused >> wtx.strFromAccount;
+                        printf("LoadWallet() upgrading tx ver=%d %d '%s' %s\n", wtx.fTimeReceivedIsTxTime, fTmp, wtx.strFromAccount.c_str(), hash.ToString().c_str());
+                        wtx.fTimeReceivedIsTxTime = fTmp;
+                    }
+                    else
+                    {
+                        printf("LoadWallet() repairing tx ver=%d %s\n", wtx.fTimeReceivedIsTxTime, hash.ToString().c_str());
+                        wtx.fTimeReceivedIsTxTime = 0;
+                    }
+                    vWalletUpgrade.push_back(hash);
+                }
+
                 //// debug print
                 //printf("LoadWallet  %s\n", wtx.GetHash().ToString().c_str());
                 //printf(" %12I64d  %s  %s  %s\n",
@@ -774,6 +794,9 @@ bool CWalletDB::LoadWallet()
         pcursor->close();
     }
 
+    foreach(uint256 hash, vWalletUpgrade)
+        WriteTx(hash, mapWallet[hash]);
+
     printf("nFileVersion = %d\n", nFileVersion);
     printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);
     printf("nTransactionFee = %"PRI64d"\n", nTransactionFee);
@@ -794,6 +817,7 @@ bool CWalletDB::LoadWallet()
         WriteVersion(VERSION);
     }
 
+
     return true;
 }
 
diff --git a/main.h b/main.h
index cca233896e..b221e62a7e 100644
--- a/main.h
+++ b/main.h
@@ -751,11 +751,10 @@ public:
     vector<CMerkleTx> vtxPrev;
     map<string, string> mapValue;
     vector<pair<string, string> > vOrderForm;
+    unsigned int fTimeReceivedIsTxTime;
     unsigned int nTimeReceived;  // time received by this node
     char fFromMe;
     char fSpent;
-    char fTimeReceivedIsTxTime;
-    char fUnused;
     string strFromAccount;
 
     // memory only
@@ -792,11 +791,10 @@ public:
         vtxPrev.clear();
         mapValue.clear();
         vOrderForm.clear();
+        fTimeReceivedIsTxTime = false;
         nTimeReceived = 0;
         fFromMe = false;
         fSpent = false;
-        fTimeReceivedIsTxTime = false;
-        fUnused = false;
         strFromAccount.clear();
         fDebitCached = false;
         fCreditCached = false;
@@ -811,24 +809,23 @@ public:
 
     IMPLEMENT_SERIALIZE
     (
+        CWalletTx* pthis = const_cast<CWalletTx*>(this);
         if (fRead)
-            const_cast<CWalletTx*>(this)->Init();
+            pthis->Init();
         nSerSize += SerReadWrite(s, *(CMerkleTx*)this, nType, nVersion, ser_action);
         READWRITE(vtxPrev);
+
+        pthis->mapValue["fromaccount"] = pthis->strFromAccount;
         READWRITE(mapValue);
+        pthis->strFromAccount = pthis->mapValue["fromaccount"];
+        pthis->mapValue.erase("fromaccount");
+        pthis->mapValue.erase("version");
+
         READWRITE(vOrderForm);
-        READWRITE(nVersion);
-        if (fRead && nVersion < 100)
-            const_cast<CWalletTx*>(this)->fTimeReceivedIsTxTime = nVersion;
+        READWRITE(fTimeReceivedIsTxTime);
         READWRITE(nTimeReceived);
         READWRITE(fFromMe);
         READWRITE(fSpent);
-        if (nVersion >= 31404)
-        {
-            READWRITE(fTimeReceivedIsTxTime);
-            READWRITE(fUnused);
-            READWRITE(strFromAccount);
-        }
     )
 
     int64 GetDebit() const
diff --git a/serialize.h b/serialize.h
index 7f47d0fcbb..eccea8f72e 100644
--- a/serialize.h
+++ b/serialize.h
@@ -25,7 +25,7 @@ class CDataStream;
 class CAutoFile;
 static const unsigned int MAX_SIZE = 0x02000000;
 
-static const int VERSION = 31703;
+static const int VERSION = 31704;
 static const char* pszSubVer = "";