Let -zapwallettxes recover transaction meta data

5 files changed, 43 insertions, 11 deletions

diff --git a/src/init.cpp b/src/init.cpp
index 39453da9c8..b9af16a156 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -259,7 +259,8 @@ std::string HelpMessage(HelpMessageMode hmm)
     strUsage += "  -upgradewallet         " + _("Upgrade wallet to latest format") + " " + _("on startup") + "\n";
     strUsage += "  -wallet=<file>         " + _("Specify wallet file (within data directory)") + " " + _("(default: wallet.dat)") + "\n";
     strUsage += "  -walletnotify=<cmd>    " + _("Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)") + "\n";
-    strUsage += "  -zapwallettxes         " + _("Clear list of wallet transactions (diagnostic tool; implies -rescan)") + "\n";
+    strUsage += "  -zapwallettxes=<mode>  " + _("Delete all wallet transactions and only recover those part of the blockchain through -rescan on startup") + "\n";
+    strUsage += "                         " + _("(default: 1, 1 = keep tx meta data e.g. account owner and payment request information, 2 = drop tx meta data)") + "\n";
 #endif
 
     strUsage += "\n" + _("Debugging/Testing options:") + "\n";
@@ -529,7 +530,7 @@ bool AppInit2(boost::thread_group& threadGroup)
     // -zapwallettx implies a rescan
     if (GetBoolArg("-zapwallettxes", false)) {
         if (SoftSetBoolArg("-rescan", true))
-            LogPrintf("AppInit2 : parameter interaction: -zapwallettxes=1 -> setting -rescan=1\n");
+            LogPrintf("AppInit2 : parameter interaction: -zapwallettxes=<mode> -> setting -rescan=1\n");
     }
 
     // Make sure enough file descriptors are available
@@ -986,11 +987,15 @@ bool AppInit2(boost::thread_group& threadGroup)
         pwalletMain = NULL;
         LogPrintf("Wallet disabled!\n");
     } else {
+
+        // needed to restore wallet transaction meta data after -zapwallettxes
+        std::vector<CWalletTx> vWtx;
+
         if (GetBoolArg("-zapwallettxes", false)) {
             uiInterface.InitMessage(_("Zapping all transactions from wallet..."));
 
             pwalletMain = new CWallet(strWalletFile);
-            DBErrors nZapWalletRet = pwalletMain->ZapWalletTx();
+            DBErrors nZapWalletRet = pwalletMain->ZapWalletTx(vWtx);
             if (nZapWalletRet != DB_LOAD_OK) {
                 uiInterface.InitMessage(_("Error loading wallet.dat: Wallet corrupted"));
                 return false;
@@ -1085,6 +1090,29 @@ bool AppInit2(boost::thread_group& threadGroup)
             LogPrintf(" rescan      %15dms\n", GetTimeMillis() - nStart);
             pwalletMain->SetBestChain(chainActive.GetLocator());
             nWalletDBUpdated++;
+
+            // Restore wallet transaction metadata after -zapwallettxes=1
+            if (GetBoolArg("-zapwallettxes", false) && GetArg("-zapwallettxes", "1") != "2")
+            {
+                BOOST_FOREACH(const CWalletTx& wtxOld, vWtx)
+                {
+                    uint256 hash = wtxOld.GetHash();
+                    std::map<uint256, CWalletTx>::iterator mi = pwalletMain->mapWallet.find(hash);
+                    if (mi != pwalletMain->mapWallet.end())
+                    {
+                        const CWalletTx* copyFrom = &wtxOld;
+                        CWalletTx* copyTo = &mi->second;
+                        copyTo->mapValue = copyFrom->mapValue;
+                        copyTo->vOrderForm = copyFrom->vOrderForm;
+                        copyTo->nTimeReceived = copyFrom->nTimeReceived;
+                        copyTo->nTimeSmart = copyFrom->nTimeSmart;
+                        copyTo->fFromMe = copyFrom->fFromMe;
+                        copyTo->strFromAccount = copyFrom->strFromAccount;
+                        copyTo->nOrderPos = copyFrom->nOrderPos;
+                        copyTo->WriteToDisk();
+                    }
+                }
+            }
         }
     } // (!fDisableWallet)
 #else // ENABLE_WALLET
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 400c966a95..36e40b1fc8 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -1511,11 +1511,11 @@ DBErrors CWallet::LoadWallet(bool& fFirstRunRet)
 }
 
 
-DBErrors CWallet::ZapWalletTx()
+DBErrors CWallet::ZapWalletTx(std::vector<CWalletTx>& vWtx)
 {
     if (!fFileBacked)
         return DB_LOAD_OK;
-    DBErrors nZapWalletTxRet = CWalletDB(strWalletFile,"cr+").ZapWalletTx(this);
+    DBErrors nZapWalletTxRet = CWalletDB(strWalletFile,"cr+").ZapWalletTx(this, vWtx);
     if (nZapWalletTxRet == DB_NEED_REWRITE)
     {
         if (CDB::Rewrite(strWalletFile, "\x04pool"))
diff --git a/src/wallet.h b/src/wallet.h
index 7df656fc25..b168116f49 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -341,7 +341,7 @@ public:
     void SetBestChain(const CBlockLocator& loc);
 
     DBErrors LoadWallet(bool& fFirstRunRet);
-    DBErrors ZapWalletTx();
+    DBErrors ZapWalletTx(std::vector<CWalletTx>& vWtx);
 
     bool SetAddressBook(const CTxDestination& address, const std::string& strName, const std::string& purpose);
 
diff --git a/src/walletdb.cpp b/src/walletdb.cpp
index 80e9dded5f..3ce2ef019c 100644
--- a/src/walletdb.cpp
+++ b/src/walletdb.cpp
@@ -680,7 +680,7 @@ DBErrors CWalletDB::LoadWallet(CWallet* pwallet)
     return result;
 }
 
-DBErrors CWalletDB::FindWalletTx(CWallet* pwallet, vector<uint256>& vTxHash)
+DBErrors CWalletDB::FindWalletTx(CWallet* pwallet, vector<uint256>& vTxHash, vector<CWalletTx>& vWtx)
 {
     pwallet->vchDefaultKey = CPubKey();
     CWalletScanState wss;
@@ -725,7 +725,11 @@ DBErrors CWalletDB::FindWalletTx(CWallet* pwallet, vector<uint256>& vTxHash)
                 uint256 hash;
                 ssKey >> hash;
 
+                CWalletTx wtx;
+                ssValue >> wtx;
+
                 vTxHash.push_back(hash);
+                vWtx.push_back(wtx);
             }
         }
         pcursor->close();
@@ -743,11 +747,11 @@ DBErrors CWalletDB::FindWalletTx(CWallet* pwallet, vector<uint256>& vTxHash)
     return result;
 }
 
-DBErrors CWalletDB::ZapWalletTx(CWallet* pwallet)
+DBErrors CWalletDB::ZapWalletTx(CWallet* pwallet, vector<CWalletTx>& vWtx)
 {
     // build list of wallet TXs
     vector<uint256> vTxHash;
-    DBErrors err = FindWalletTx(pwallet, vTxHash);
+    DBErrors err = FindWalletTx(pwallet, vTxHash, vWtx);
     if (err != DB_LOAD_OK)
         return err;
 
diff --git a/src/walletdb.h b/src/walletdb.h
index 3bfb436050..8eb716acbb 100644
--- a/src/walletdb.h
+++ b/src/walletdb.h
@@ -122,8 +122,8 @@ public:
 
     DBErrors ReorderTransactions(CWallet*);
     DBErrors LoadWallet(CWallet* pwallet);
-    DBErrors FindWalletTx(CWallet* pwallet, std::vector<uint256>& vTxHash);
-    DBErrors ZapWalletTx(CWallet* pwallet);
+    DBErrors FindWalletTx(CWallet* pwallet, std::vector<uint256>& vTxHash, std::vector<CWalletTx>& vWtx);
+    DBErrors ZapWalletTx(CWallet* pwallet, std::vector<CWalletTx>& vWtx);
     static bool Recover(CDBEnv& dbenv, std::string filename, bool fOnlyKeys);
     static bool Recover(CDBEnv& dbenv, std::string filename);
 };