refactor: move bdb (bitdb) interaction from init.cpp to wallet.cpp

this will remove db.h from init.cpp

src/init.cpp

@@ -24,7 +24,6 @@
 #include "util.h"
 #include "utilmoneystr.h"
 #ifdef ENABLE_WALLET
-#include "wallet/db.h"
 #include "wallet/wallet.h"
 #include "wallet/walletdb.h"
 #endif
@@ -151,7 +150,7 @@ void Shutdown()
     StopRPCThreads();
 #ifdef ENABLE_WALLET
     if (pwalletMain)
-        bitdb.Flush(false);
+        pwalletMain->Flush(false);
     GenerateBitcoins(false, NULL, 0);
 #endif
     StopNode();
@@ -184,7 +183,7 @@ void Shutdown()
     }
 #ifdef ENABLE_WALLET
     if (pwalletMain)
-        bitdb.Flush(true);
+        pwalletMain->Flush(true);
 #endif
 #ifndef WIN32
     boost::filesystem::remove(GetPidFile());
@@ -852,47 +851,17 @@ bool AppInit2(boost::thread_group& threadGroup)
         LogPrintf("Using wallet %s\n", strWalletFile);
         uiInterface.InitMessage(_("Verifying wallet..."));
 
-        if (!bitdb.Open(GetDataDir()))
-        {
-            // try moving the database env out of the way
-            boost::filesystem::path pathDatabase = GetDataDir() / "database";
-            boost::filesystem::path pathDatabaseBak = GetDataDir() / strprintf("database.%d.bak", GetTime());
-            try {
-                boost::filesystem::rename(pathDatabase, pathDatabaseBak);
-                LogPrintf("Moved old %s to %s. Retrying.\n", pathDatabase.string(), pathDatabaseBak.string());
-            } catch (const boost::filesystem::filesystem_error&) {
-                 // failure is ok (well, not really, but it's not worse than what we started with)
-            }
+        std::string warningString;
+        std::string errorString;
         
-            // try again
-            if (!bitdb.Open(GetDataDir())) {
-                // if it still fails, it probably means we can't even create the database env
-                string msg = strprintf(_("Error initializing wallet database environment %s!"), strDataDir);
-                return InitError(msg);
-            }
-        }
-
-        if (GetBoolArg("-salvagewallet", false))
-        {
-            // Recover readable keypairs:
-            if (!CWalletDB::Recover(bitdb, strWalletFile, true))
+        if (!CWallet::Verify(strWalletFile, warningString, errorString))
             return false;
-        }
         
-        if (boost::filesystem::exists(GetDataDir() / strWalletFile))
-        {
-            CDBEnv::VerifyResult r = bitdb.Verify(strWalletFile, CWalletDB::Recover);
-            if (r == CDBEnv::RECOVER_OK)
-            {
-                string msg = strprintf(_("Warning: wallet.dat corrupt, data salvaged!"
-                                         " Original wallet.dat saved as wallet.{timestamp}.bak in %s; if"
-                                         " your balance or transactions are incorrect you should"
-                                         " restore from a backup."), strDataDir);
-                InitWarning(msg);
-            }
-            if (r == CDBEnv::RECOVER_FAIL)
-                return InitError(_("wallet.dat corrupt, salvage failed"));
-        }
+        if (!warningString.empty())
+            InitWarning(warningString);
+        if (!errorString.empty())
+            return InitError(warningString);
+        
     } // (!fDisableWallet)
 #endif // ENABLE_WALLET
     // ********************************************************* Step 6: network initialization

src/wallet/wallet.cpp

@@ -18,6 +18,7 @@
 #include <assert.h>
 
 #include <boost/algorithm/string/replace.hpp>
+#include <boost/filesystem.hpp>
 #include <boost/thread.hpp>
 
 using namespace std;
@@ -339,6 +340,58 @@ set<uint256> CWallet::GetConflicts(const uint256& txid) const
     return result;
 }
 
+void CWallet::Flush(bool shutdown)
+{
+    bitdb.Flush(shutdown);
+}
+
+bool CWallet::Verify(const string walletFile, string& warningString, string& errorString)
+{
+    if (!bitdb.Open(GetDataDir()))
+    {
+        // try moving the database env out of the way
+        boost::filesystem::path pathDatabase = GetDataDir() / "database";
+        boost::filesystem::path pathDatabaseBak = GetDataDir() / strprintf("database.%d.bak", GetTime());
+        try {
+            boost::filesystem::rename(pathDatabase, pathDatabaseBak);
+            LogPrintf("Moved old %s to %s. Retrying.\n", pathDatabase.string(), pathDatabaseBak.string());
+        } catch (const boost::filesystem::filesystem_error&) {
+            // failure is ok (well, not really, but it's not worse than what we started with)
+        }
+        
+        // try again
+        if (!bitdb.Open(GetDataDir())) {
+            // if it still fails, it probably means we can't even create the database env
+            string msg = strprintf(_("Error initializing wallet database environment %s!"), GetDataDir());
+            errorString += msg;
+            return true;
+        }
+    }
+    
+    if (GetBoolArg("-salvagewallet", false))
+    {
+        // Recover readable keypairs:
+        if (!CWalletDB::Recover(bitdb, walletFile, true))
+            return false;
+    }
+    
+    if (boost::filesystem::exists(GetDataDir() / walletFile))
+    {
+        CDBEnv::VerifyResult r = bitdb.Verify(walletFile, CWalletDB::Recover);
+        if (r == CDBEnv::RECOVER_OK)
+        {
+            warningString += strprintf(_("Warning: wallet.dat corrupt, data salvaged!"
+                                     " Original wallet.dat saved as wallet.{timestamp}.bak in %s; if"
+                                     " your balance or transactions are incorrect you should"
+                                     " restore from a backup."), GetDataDir());
+        }
+        if (r == CDBEnv::RECOVER_FAIL)
+            errorString += _("wallet.dat corrupt, salvage failed");
+    }
+    
+    return true;
+}
+
 void CWallet::SyncMetaData(pair<TxSpends::iterator, TxSpends::iterator> range)
 {
     // We want all the wallet transactions in range to have the same metadata as

src/wallet/wallet.h

@@ -743,6 +743,12 @@ public:
     //! Get wallet transactions that conflict with given transaction (spend same outputs)
     std::set<uint256> GetConflicts(const uint256& txid) const;
 
+    //! Flush wallet (bitdb flush)
+    void Flush(bool shutdown=false);
+
+    //! Verify the wallet database and perform salvage if required
+    static bool Verify(const std::string walletFile, std::string& warningString, std::string& errorString);
+    
     /** 
      * Address book entry changed.
      * @note called with lock cs_wallet held.