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wallet: CWalletDB CDB composition not inheritance 

CWalletDB now contains a CDB instead of inheriting from it.

This makes it easier to replace the internal transaction with a different
database, without leaking through internals.
This commit is contained in:
Wladimir J. van der Laan 2017-03-08 16:20:08 +00:00
parent be9e1a968d
commit 33232810dc
3 changed files with 84 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/wallet/db.h
View File

@ -144,10 +144,10 @@ protected:
bool fFlushOnClose;
CDBEnv *env;
public:
explicit CDB(CWalletDBWrapper& dbw, const char* pszMode = "r+", bool fFlushOnCloseIn=true);
~CDB() { Close(); }
public:
void Flush();
void Close();
static bool Recover(const std::string& filename, void *callbackDataIn, bool (*recoverKVcallback)(void* callbackData, CDataStream ssKey, CDataStream ssValue));
@ -164,7 +164,7 @@ private:
CDB(const CDB&);
void operator=(const CDB&);
protected:
public:
template <typename K, typename T>
bool Read(const K& key, T& value)
{

108
src/wallet/walletdb.cpp
View File

@ -33,7 +33,7 @@ static std::atomic<unsigned int> nWalletDBUpdateCounter;
bool CWalletDB::WriteName(const std::string& strAddress, const std::string& strName)
{
nWalletDBUpdateCounter++;
return Write(make_pair(std::string("name"), strAddress), strName);
return batch.Write(std::make_pair(std::string("name"), strAddress), strName);
}
bool CWalletDB::EraseName(const std::string& strAddress)
@ -41,38 +41,38 @@ bool CWalletDB::EraseName(const std::string& strAddress)
// This should only be used for sending addresses, never for receiving addresses,
// receiving addresses must always have an address book entry if they're not change return.
nWalletDBUpdateCounter++;
return Erase(make_pair(std::string("name"), strAddress));
return batch.Erase(std::make_pair(std::string("name"), strAddress));
}
bool CWalletDB::WritePurpose(const std::string& strAddress, const std::string& strPurpose)
{
nWalletDBUpdateCounter++;
return Write(make_pair(std::string("purpose"), strAddress), strPurpose);
return batch.Write(std::make_pair(std::string("purpose"), strAddress), strPurpose);
}
bool CWalletDB::ErasePurpose(const std::string& strPurpose)
{
nWalletDBUpdateCounter++;
return Erase(make_pair(std::string("purpose"), strPurpose));
return batch.Erase(std::make_pair(std::string("purpose"), strPurpose));
}
bool CWalletDB::WriteTx(const CWalletTx& wtx)
{
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("tx"), wtx.GetHash()), wtx);
return batch.Write(std::make_pair(std::string("tx"), wtx.GetHash()), wtx);
}
bool CWalletDB::EraseTx(uint256 hash)
{
nWalletDBUpdateCounter++;
return Erase(std::make_pair(std::string("tx"), hash));
return batch.Erase(std::make_pair(std::string("tx"), hash));
}
bool CWalletDB::WriteKey(const CPubKey& vchPubKey, const CPrivKey& vchPrivKey, const CKeyMetadata& keyMeta)
{
nWalletDBUpdateCounter++;
if (!Write(std::make_pair(std::string("keymeta"), vchPubKey),
if (!batch.Write(std::make_pair(std::string("keymeta"), vchPubKey),
keyMeta, false))
return false;
@ -82,7 +82,7 @@ bool CWalletDB::WriteKey(const CPubKey& vchPubKey, const CPrivKey& vchPrivKey, c
vchKey.insert(vchKey.end(), vchPubKey.begin(), vchPubKey.end());
vchKey.insert(vchKey.end(), vchPrivKey.begin(), vchPrivKey.end());
return Write(std::make_pair(std::string("key"), vchPubKey), std::make_pair(vchPrivKey, Hash(vchKey.begin(), vchKey.end())), false);
return batch.Write(std::make_pair(std::string("key"), vchPubKey), std::make_pair(vchPrivKey, Hash(vchKey.begin(), vchKey.end())), false);
}
bool CWalletDB::WriteCryptedKey(const CPubKey& vchPubKey,
@ -92,16 +92,16 @@ bool CWalletDB::WriteCryptedKey(const CPubKey& vchPubKey,
const bool fEraseUnencryptedKey = true;
nWalletDBUpdateCounter++;
if (!Write(std::make_pair(std::string("keymeta"), vchPubKey),
if (!batch.Write(std::make_pair(std::string("keymeta"), vchPubKey),
keyMeta))
return false;
if (!Write(std::make_pair(std::string("ckey"), vchPubKey), vchCryptedSecret, false))
if (!batch.Write(std::make_pair(std::string("ckey"), vchPubKey), vchCryptedSecret, false))
return false;
if (fEraseUnencryptedKey)
{
Erase(std::make_pair(std::string("key"), vchPubKey));
Erase(std::make_pair(std::string("wkey"), vchPubKey));
batch.Erase(std::make_pair(std::string("key"), vchPubKey));
batch.Erase(std::make_pair(std::string("wkey"), vchPubKey));
}
return true;
}
@ -109,92 +109,92 @@ bool CWalletDB::WriteCryptedKey(const CPubKey& vchPubKey,
bool CWalletDB::WriteMasterKey(unsigned int nID, const CMasterKey& kMasterKey)
{
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("mkey"), nID), kMasterKey, true);
return batch.Write(std::make_pair(std::string("mkey"), nID), kMasterKey, true);
}
bool CWalletDB::WriteCScript(const uint160& hash, const CScript& redeemScript)
{
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("cscript"), hash), *(const CScriptBase*)(&redeemScript), false);
return batch.Write(std::make_pair(std::string("cscript"), hash), *(const CScriptBase*)(&redeemScript), false);
}
bool CWalletDB::WriteWatchOnly(const CScript &dest, const CKeyMetadata& keyMeta)
{
nWalletDBUpdateCounter++;
if (!Write(std::make_pair(std::string("watchmeta"), *(const CScriptBase*)(&dest)), keyMeta))
if (!batch.Write(std::make_pair(std::string("watchmeta"), *(const CScriptBase*)(&dest)), keyMeta))
return false;
return Write(std::make_pair(std::string("watchs"), *(const CScriptBase*)(&dest)), '1');
return batch.Write(std::make_pair(std::string("watchs"), *(const CScriptBase*)(&dest)), '1');
}
bool CWalletDB::EraseWatchOnly(const CScript &dest)
{
nWalletDBUpdateCounter++;
if (!Erase(std::make_pair(std::string("watchmeta"), *(const CScriptBase*)(&dest))))
if (!batch.Erase(std::make_pair(std::string("watchmeta"), *(const CScriptBase*)(&dest))))
return false;
return Erase(std::make_pair(std::string("watchs"), *(const CScriptBase*)(&dest)));
return batch.Erase(std::make_pair(std::string("watchs"), *(const CScriptBase*)(&dest)));
}
bool CWalletDB::WriteBestBlock(const CBlockLocator& locator)
{
nWalletDBUpdateCounter++;
Write(std::string("bestblock"), CBlockLocator()); // Write empty block locator so versions that require a merkle branch automatically rescan
return Write(std::string("bestblock_nomerkle"), locator);
batch.Write(std::string("bestblock"), CBlockLocator()); // Write empty block locator so versions that require a merkle branch automatically rescan
return batch.Write(std::string("bestblock_nomerkle"), locator);
}
bool CWalletDB::ReadBestBlock(CBlockLocator& locator)
{
if (Read(std::string("bestblock"), locator) && !locator.vHave.empty()) return true;
return Read(std::string("bestblock_nomerkle"), locator);
if (batch.Read(std::string("bestblock"), locator) && !locator.vHave.empty()) return true;
return batch.Read(std::string("bestblock_nomerkle"), locator);
}
bool CWalletDB::WriteOrderPosNext(int64_t nOrderPosNext)
{
nWalletDBUpdateCounter++;
return Write(std::string("orderposnext"), nOrderPosNext);
return batch.Write(std::string("orderposnext"), nOrderPosNext);
}
bool CWalletDB::WriteDefaultKey(const CPubKey& vchPubKey)
{
nWalletDBUpdateCounter++;
return Write(std::string("defaultkey"), vchPubKey);
return batch.Write(std::string("defaultkey"), vchPubKey);
}
bool CWalletDB::ReadPool(int64_t nPool, CKeyPool& keypool)
{
return Read(std::make_pair(std::string("pool"), nPool), keypool);
return batch.Read(std::make_pair(std::string("pool"), nPool), keypool);
}
bool CWalletDB::WritePool(int64_t nPool, const CKeyPool& keypool)
{
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("pool"), nPool), keypool);
return batch.Write(std::make_pair(std::string("pool"), nPool), keypool);
}
bool CWalletDB::ErasePool(int64_t nPool)
{
nWalletDBUpdateCounter++;
return Erase(std::make_pair(std::string("pool"), nPool));
return batch.Erase(std::make_pair(std::string("pool"), nPool));
}
bool CWalletDB::WriteMinVersion(int nVersion)
{
return Write(std::string("minversion"), nVersion);
return batch.Write(std::string("minversion"), nVersion);
}
bool CWalletDB::ReadAccount(const std::string& strAccount, CAccount& account)
{
account.SetNull();
return Read(make_pair(std::string("acc"), strAccount), account);
return batch.Read(std::make_pair(std::string("acc"), strAccount), account);
}
bool CWalletDB::WriteAccount(const std::string& strAccount, const CAccount& account)
{
return Write(make_pair(std::string("acc"), strAccount), account);
return batch.Write(std::make_pair(std::string("acc"), strAccount), account);
}
bool CWalletDB::WriteAccountingEntry(const uint64_t nAccEntryNum, const CAccountingEntry& acentry)
{
return Write(std::make_pair(std::string("acentry"), std::make_pair(acentry.strAccount, nAccEntryNum)), acentry);
return batch.Write(std::make_pair(std::string("acentry"), std::make_pair(acentry.strAccount, nAccEntryNum)), acentry);
}
bool CWalletDB::WriteAccountingEntry_Backend(const CAccountingEntry& acentry)
@ -218,7 +218,7 @@ void CWalletDB::ListAccountCreditDebit(const std::string& strAccount, std::list<
{
bool fAllAccounts = (strAccount == "*");
Dbc* pcursor = GetCursor();
Dbc* pcursor = batch.GetCursor();
if (!pcursor)
throw std::runtime_error(std::string(__func__) + ": cannot create DB cursor");
bool setRange = true;
@ -229,7 +229,7 @@ void CWalletDB::ListAccountCreditDebit(const std::string& strAccount, std::list<
if (setRange)
ssKey << std::make_pair(std::string("acentry"), std::make_pair((fAllAccounts ? std::string("") : strAccount), uint64_t(0)));
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
int ret = ReadAtCursor(pcursor, ssKey, ssValue, setRange);
int ret = batch.ReadAtCursor(pcursor, ssKey, ssValue, setRange);
setRange = false;
if (ret == DB_NOTFOUND)
break;
@ -560,7 +560,7 @@ DBErrors CWalletDB::LoadWallet(CWallet* pwallet)
LOCK(pwallet->cs_wallet);
try {
int nMinVersion = 0;
if (Read((std::string)"minversion", nMinVersion))
if (batch.Read((std::string)"minversion", nMinVersion))
{
if (nMinVersion > CLIENT_VERSION)
return DB_TOO_NEW;
@ -568,7 +568,7 @@ DBErrors CWalletDB::LoadWallet(CWallet* pwallet)
}
// Get cursor
Dbc* pcursor = GetCursor();
Dbc* pcursor = batch.GetCursor();
if (!pcursor)
{
LogPrintf("Error getting wallet database cursor\n");
@ -580,7 +580,7 @@ DBErrors CWalletDB::LoadWallet(CWallet* pwallet)
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
int ret = ReadAtCursor(pcursor, ssKey, ssValue);
int ret = batch.ReadAtCursor(pcursor, ssKey, ssValue);
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
@ -664,14 +664,14 @@ DBErrors CWalletDB::FindWalletTx(std::vector<uint256>& vTxHash, std::vector<CWal
try {
int nMinVersion = 0;
if (Read((std::string)"minversion", nMinVersion))
if (batch.Read((std::string)"minversion", nMinVersion))
{
if (nMinVersion > CLIENT_VERSION)
return DB_TOO_NEW;
}
// Get cursor
Dbc* pcursor = GetCursor();
Dbc* pcursor = batch.GetCursor();
if (!pcursor)
{
LogPrintf("Error getting wallet database cursor\n");
@ -683,7 +683,7 @@ DBErrors CWalletDB::FindWalletTx(std::vector<uint256>& vTxHash, std::vector<CWal
// Read next record
CDataStream ssKey(SER_DISK, CLIENT_VERSION);
CDataStream ssValue(SER_DISK, CLIENT_VERSION);
int ret = ReadAtCursor(pcursor, ssKey, ssValue);
int ret = batch.ReadAtCursor(pcursor, ssKey, ssValue);
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
@ -855,20 +855,20 @@ bool CWalletDB::VerifyDatabaseFile(const std::string& walletFile, const fs::path
bool CWalletDB::WriteDestData(const std::string &address, const std::string &key, const std::string &value)
{
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("destdata"), std::make_pair(address, key)), value);
return batch.Write(std::make_pair(std::string("destdata"), std::make_pair(address, key)), value);
}
bool CWalletDB::EraseDestData(const std::string &address, const std::string &key)
{
nWalletDBUpdateCounter++;
return Erase(std::make_pair(std::string("destdata"), std::make_pair(address, key)));
return batch.Erase(std::make_pair(std::string("destdata"), std::make_pair(address, key)));
}
bool CWalletDB::WriteHDChain(const CHDChain& chain)
{
nWalletDBUpdateCounter++;
return Write(std::string("hdchain"), chain);
return batch.Write(std::string("hdchain"), chain);
}
void CWalletDB::IncrementUpdateCounter()
@ -881,3 +881,27 @@ unsigned int CWalletDB::GetUpdateCounter()
return nWalletDBUpdateCounter;
}
bool CWalletDB::TxnBegin()
{
return batch.TxnBegin();
}
bool CWalletDB::TxnCommit()
{
return batch.TxnCommit();
}
bool CWalletDB::TxnAbort()
{
return batch.TxnAbort();
}
bool CWalletDB::ReadVersion(int& nVersion)
{
return batch.ReadVersion(nVersion);
}
bool CWalletDB::WriteVersion(int nVersion)
{
return batch.WriteVersion(nVersion);
}

18
src/wallet/walletdb.h
View File

@ -123,10 +123,11 @@ public:
* database. It will be committed when the object goes out of scope.
* Optionally (on by default) it will flush to disk as well.
*/
class CWalletDB : public CDB
class CWalletDB
{
public:
CWalletDB(CWalletDBWrapper& dbw, const char* pszMode = "r+", bool _fFlushOnClose = true) : CDB(dbw, pszMode, _fFlushOnClose)
CWalletDB(CWalletDBWrapper& dbw, const char* pszMode = "r+", bool _fFlushOnClose = true) :
batch(dbw, pszMode, _fFlushOnClose)
{
}
@ -198,7 +199,20 @@ public:
static void IncrementUpdateCounter();
static unsigned int GetUpdateCounter();
//! Begin a new transaction
bool TxnBegin();
//! Commit current transaction
bool TxnCommit();
//! Abort current transaction
bool TxnAbort();
//! Read wallet version
bool ReadVersion(int& nVersion);
//! Write wallet version
bool WriteVersion(int nVersion);
private:
CDB batch;
CWalletDB(const CWalletDB&);
void operator=(const CWalletDB&);
};