Merge #9143: Refactor ZapWalletTxes to avoid layer violations

0165a56 Refactor ZapWalletTxes to avoid layer vialotions (Jonas Schnelli)

Tree-SHA512: 51e3abbb866185817d14d685a65cb1070a7a60aa3db692670f3a5fdd328aad59afa765c5a6b13d9e8f6d219e735487f8c87998f2fb38fdd911c1fe19bea373b9

Author: laanwj

src/wallet/wallet.cpp

@@ -2870,12 +2870,16 @@ DBErrors CWallet::ZapSelectTx(vector<uint256>& vHashIn, vector<uint256>& vHashOu
 {
     if (!fFileBacked)
         return DB_LOAD_OK;
-    DBErrors nZapSelectTxRet = CWalletDB(strWalletFile,"cr+").ZapSelectTx(this, vHashIn, vHashOut);
+    AssertLockHeld(cs_wallet); // mapWallet
+    vchDefaultKey = CPubKey();
+    DBErrors nZapSelectTxRet = CWalletDB(strWalletFile,"cr+").ZapSelectTx(vHashIn, vHashOut);
+    for (uint256 hash : vHashOut)
+        mapWallet.erase(hash);
+
     if (nZapSelectTxRet == DB_NEED_REWRITE)
     {
         if (CDB::Rewrite(strWalletFile, "\x04pool"))
         {
-            LOCK(cs_wallet);
             setKeyPool.clear();
             // Note: can't top-up keypool here, because wallet is locked.
             // User will be prompted to unlock wallet the next operation
@@ -2896,7 +2900,8 @@ DBErrors CWallet::ZapWalletTx(std::vector<CWalletTx>& vWtx)
 {
     if (!fFileBacked)
         return DB_LOAD_OK;
-    DBErrors nZapWalletTxRet = CWalletDB(strWalletFile,"cr+").ZapWalletTx(this, vWtx);
+    vchDefaultKey = CPubKey();
+    DBErrors nZapWalletTxRet = CWalletDB(strWalletFile,"cr+").ZapWalletTx(vWtx);
     if (nZapWalletTxRet == DB_NEED_REWRITE)
     {
         if (CDB::Rewrite(strWalletFile, "\x04pool"))

src/wallet/walletdb.cpp

@@ -659,20 +659,17 @@ DBErrors CWalletDB::LoadWallet(CWallet* pwallet)
     return result;
 }
 
-DBErrors CWalletDB::FindWalletTx(CWallet* pwallet, vector<uint256>& vTxHash, vector<CWalletTx>& vWtx)
+DBErrors CWalletDB::FindWalletTx(vector<uint256>& vTxHash, vector<CWalletTx>& vWtx)
 {
-    pwallet->vchDefaultKey = CPubKey();
     bool fNoncriticalErrors = false;
     DBErrors result = DB_LOAD_OK;
 
     try {
-        LOCK(pwallet->cs_wallet);
         int nMinVersion = 0;
         if (Read((string)"minversion", nMinVersion))
         {
             if (nMinVersion > CLIENT_VERSION)
                 return DB_TOO_NEW;
-            pwallet->LoadMinVersion(nMinVersion);
         }
 
         // Get cursor
@@ -725,12 +722,12 @@ DBErrors CWalletDB::FindWalletTx(CWallet* pwallet, vector<uint256>& vTxHash, vec
     return result;
 }
 
-DBErrors CWalletDB::ZapSelectTx(CWallet* pwallet, vector<uint256>& vTxHashIn, vector<uint256>& vTxHashOut)
+DBErrors CWalletDB::ZapSelectTx(vector<uint256>& vTxHashIn, vector<uint256>& vTxHashOut)
 {
     // build list of wallet TXs and hashes
     vector<uint256> vTxHash;
     vector<CWalletTx> vWtx;
-    DBErrors err = FindWalletTx(pwallet, vTxHash, vWtx);
+    DBErrors err = FindWalletTx(vTxHash, vWtx);
     if (err != DB_LOAD_OK) {
         return err;
     }
@@ -749,7 +746,6 @@ DBErrors CWalletDB::ZapSelectTx(CWallet* pwallet, vector<uint256>& vTxHashIn, ve
             break;
         }
         else if ((*it) == hash) {
-            pwallet->mapWallet.erase(hash);
             if(!EraseTx(hash)) {
                 LogPrint("db", "Transaction was found for deletion but returned database error: %s\n", hash.GetHex());
                 delerror = true;
@@ -764,11 +760,11 @@ DBErrors CWalletDB::ZapSelectTx(CWallet* pwallet, vector<uint256>& vTxHashIn, ve
     return DB_LOAD_OK;
 }
 
-DBErrors CWalletDB::ZapWalletTx(CWallet* pwallet, vector<CWalletTx>& vWtx)
+DBErrors CWalletDB::ZapWalletTx(vector<CWalletTx>& vWtx)
 {
     // build list of wallet TXs
     vector<uint256> vTxHash;
-    DBErrors err = FindWalletTx(pwallet, vTxHash, vWtx);
+    DBErrors err = FindWalletTx(vTxHash, vWtx);
     if (err != DB_LOAD_OK)
         return err;
 

src/wallet/walletdb.h

@@ -167,9 +167,9 @@ class CWalletDB : public CDB
     void ListAccountCreditDebit(const std::string& strAccount, std::list<CAccountingEntry>& acentries);
 
     DBErrors LoadWallet(CWallet* pwallet);
-    DBErrors FindWalletTx(CWallet* pwallet, std::vector<uint256>& vTxHash, std::vector<CWalletTx>& vWtx);
-    DBErrors ZapWalletTx(CWallet* pwallet, std::vector<CWalletTx>& vWtx);
-    DBErrors ZapSelectTx(CWallet* pwallet, std::vector<uint256>& vHashIn, std::vector<uint256>& vHashOut);
+    DBErrors FindWalletTx(std::vector<uint256>& vTxHash, std::vector<CWalletTx>& vWtx);
+    DBErrors ZapWalletTx(std::vector<CWalletTx>& vWtx);
+    DBErrors ZapSelectTx(std::vector<uint256>& vHashIn, std::vector<uint256>& vHashOut);
     static bool Recover(CDBEnv& dbenv, const std::string& filename, bool fOnlyKeys);
     static bool Recover(CDBEnv& dbenv, const std::string& filename);