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db.cpp
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db.cpp
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// Copyright (c) 2009 Satoshi Nakamoto
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#include "headers.h"
//
// CDB
//
static CCriticalSection cs_db;
static bool fDbEnvInit = false;
DbEnv dbenv(0);
static map<string, int> mapFileUseCount;
class CDBInit
{
public:
CDBInit()
{
}
~CDBInit()
{
if (fDbEnvInit)
{
dbenv.close(0);
fDbEnvInit = false;
}
}
}
instance_of_cdbinit;
CDB::CDB(const char* pszFile, const char* pszMode, bool fTxn) : pdb(NULL)
{
int ret;
if (pszFile == NULL)
return;
bool fCreate = strchr(pszMode, 'c');
bool fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w'));
unsigned int nFlags = DB_THREAD;
if (fCreate)
nFlags |= DB_CREATE;
else if (fReadOnly)
nFlags |= DB_RDONLY;
if (!fReadOnly || fTxn)
nFlags |= DB_AUTO_COMMIT;
CRITICAL_BLOCK(cs_db)
{
if (!fDbEnvInit)
{
string strAppDir = GetAppDir();
string strLogDir = strAppDir + "\\database";
_mkdir(strLogDir.c_str());
printf("dbenv.open strAppDir=%s\n", strAppDir.c_str());
dbenv.set_lg_dir(strLogDir.c_str());
dbenv.set_lg_max(10000000);
dbenv.set_lk_max_locks(10000);
dbenv.set_lk_max_objects(10000);
dbenv.set_errfile(fopen("db.log", "a")); /// debug
///dbenv.log_set_config(DB_LOG_AUTO_REMOVE, 1); /// causes corruption
ret = dbenv.open(strAppDir.c_str(),
DB_CREATE |
DB_INIT_LOCK |
DB_INIT_LOG |
DB_INIT_MPOOL |
DB_INIT_TXN |
DB_THREAD |
DB_PRIVATE |
DB_RECOVER,
0);
if (ret > 0)
throw runtime_error(strprintf("CDB() : error %d opening database environment\n", ret));
fDbEnvInit = true;
}
strFile = pszFile;
++mapFileUseCount[strFile];
}
pdb = new Db(&dbenv, 0);
ret = pdb->open(NULL, // Txn pointer
pszFile, // Filename
"main", // Logical db name
DB_BTREE, // Database type
nFlags, // Flags
0);
if (ret > 0)
{
delete pdb;
pdb = NULL;
CRITICAL_BLOCK(cs_db)
--mapFileUseCount[strFile];
strFile = "";
throw runtime_error(strprintf("CDB() : can't open database file %s, error %d\n", pszFile, ret));
}
if (fCreate && !Exists(string("version")))
WriteVersion(VERSION);
RandAddSeed();
}
void CDB::Close()
{
if (!pdb)
return;
if (!vTxn.empty())
vTxn.front()->abort();
vTxn.clear();
pdb->close(0);
delete pdb;
pdb = NULL;
dbenv.txn_checkpoint(0, 0, 0);
CRITICAL_BLOCK(cs_db)
--mapFileUseCount[strFile];
RandAddSeed();
}
void DBFlush(bool fShutdown)
{
// Flush log data to the actual data file
// on all files that are not in use
printf("DBFlush(%s)\n", fShutdown ? "true" : "false");
CRITICAL_BLOCK(cs_db)
{
dbenv.txn_checkpoint(0, 0, 0);
map<string, int>::iterator mi = mapFileUseCount.begin();
while (mi != mapFileUseCount.end())
{
string strFile = (*mi).first;
int nRefCount = (*mi).second;
if (nRefCount == 0)
{
dbenv.lsn_reset(strFile.c_str(), 0);
mapFileUseCount.erase(mi++);
}
else
mi++;
}
if (fShutdown)
{
char** listp;
if (mapFileUseCount.empty())
dbenv.log_archive(&listp, DB_ARCH_REMOVE);
dbenv.close(0);
fDbEnvInit = false;
}
}
}
//
// CTxDB
//
bool CTxDB::ReadTxIndex(uint256 hash, CTxIndex& txindex)
{
assert(!fClient);
txindex.SetNull();
return Read(make_pair(string("tx"), hash), txindex);
}
bool CTxDB::UpdateTxIndex(uint256 hash, const CTxIndex& txindex)
{
assert(!fClient);
return Write(make_pair(string("tx"), hash), txindex);
}
bool CTxDB::AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight)
{
assert(!fClient);
// Add to tx index
uint256 hash = tx.GetHash();
CTxIndex txindex(pos, tx.vout.size());
return Write(make_pair(string("tx"), hash), txindex);
}
bool CTxDB::EraseTxIndex(const CTransaction& tx)
{
assert(!fClient);
uint256 hash = tx.GetHash();
return Erase(make_pair(string("tx"), hash));
}
bool CTxDB::ContainsTx(uint256 hash)
{
assert(!fClient);
return Exists(make_pair(string("tx"), hash));
}
bool CTxDB::ReadOwnerTxes(uint160 hash160, int nMinHeight, vector<CTransaction>& vtx)
{
assert(!fClient);
vtx.clear();
// Get cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
return false;
unsigned int fFlags = DB_SET_RANGE;
loop
{
// Read next record
CDataStream ssKey;
if (fFlags == DB_SET_RANGE)
ssKey << string("owner") << hash160 << CDiskTxPos(0, 0, 0);
CDataStream ssValue;
int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
fFlags = DB_NEXT;
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
string strType;
uint160 hashItem;
CDiskTxPos pos;
ssKey >> strType >> hashItem >> pos;
int nItemHeight;
ssValue >> nItemHeight;
// Read transaction
if (strType != "owner" || hashItem != hash160)
break;
if (nItemHeight >= nMinHeight)
{
vtx.resize(vtx.size()+1);
if (!vtx.back().ReadFromDisk(pos))
return false;
}
}
return true;
}
bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
{
assert(!fClient);
tx.SetNull();
if (!ReadTxIndex(hash, txindex))
return false;
return (tx.ReadFromDisk(txindex.pos));
}
bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
{
CTxIndex txindex;
return ReadDiskTx(hash, tx, txindex);
}
bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
{
return ReadDiskTx(outpoint.hash, tx, txindex);
}
bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
{
CTxIndex txindex;
return ReadDiskTx(outpoint.hash, tx, txindex);
}
bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
{
return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
}
bool CTxDB::EraseBlockIndex(uint256 hash)
{
return Erase(make_pair(string("blockindex"), hash));
}
bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
{
return Read(string("hashBestChain"), hashBestChain);
}
bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
{
return Write(string("hashBestChain"), hashBestChain);
}
CBlockIndex* InsertBlockIndex(uint256 hash)
{
if (hash == 0)
return NULL;
// Return existing
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
if (mi != mapBlockIndex.end())
return (*mi).second;
// Create new
CBlockIndex* pindexNew = new CBlockIndex();
if (!pindexNew)
throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
pindexNew->phashBlock = &((*mi).first);
return pindexNew;
}
bool CTxDB::LoadBlockIndex()
{
// Get cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
return false;
unsigned int fFlags = DB_SET_RANGE;
loop
{
// Read next record
CDataStream ssKey;
if (fFlags == DB_SET_RANGE)
ssKey << make_pair(string("blockindex"), uint256(0));
CDataStream ssValue;
int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
fFlags = DB_NEXT;
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
string strType;
ssKey >> strType;
if (strType == "blockindex")
{
CDiskBlockIndex diskindex;
ssValue >> diskindex;
// Construct block index object
CBlockIndex* pindexNew = InsertBlockIndex(diskindex.GetBlockHash());
pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
pindexNew->pnext = InsertBlockIndex(diskindex.hashNext);
pindexNew->nFile = diskindex.nFile;
pindexNew->nBlockPos = diskindex.nBlockPos;
pindexNew->nHeight = diskindex.nHeight;
pindexNew->nVersion = diskindex.nVersion;
pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
pindexNew->nTime = diskindex.nTime;
pindexNew->nBits = diskindex.nBits;
pindexNew->nNonce = diskindex.nNonce;
// Watch for genesis block and best block
if (pindexGenesisBlock == NULL && diskindex.GetBlockHash() == hashGenesisBlock)
pindexGenesisBlock = pindexNew;
}
else
{
break;
}
}
if (!ReadHashBestChain(hashBestChain))
{
if (pindexGenesisBlock == NULL)
return true;
return error("CTxDB::LoadBlockIndex() : hashBestChain not found\n");
}
if (!mapBlockIndex.count(hashBestChain))
return error("CTxDB::LoadBlockIndex() : blockindex for hashBestChain not found\n");
pindexBest = mapBlockIndex[hashBestChain];
nBestHeight = pindexBest->nHeight;
printf("LoadBlockIndex(): hashBestChain=%s height=%d\n", hashBestChain.ToString().substr(0,14).c_str(), nBestHeight);
return true;
}
//
// CAddrDB
//
bool CAddrDB::WriteAddress(const CAddress& addr)
{
return Write(make_pair(string("addr"), addr.GetKey()), addr);
}
bool CAddrDB::LoadAddresses()
{
CRITICAL_BLOCK(cs_mapAddresses)
{
// Load user provided addresses
CAutoFile filein = fopen("addr.txt", "rt");
if (filein)
{
try
{
char psz[1000];
while (fgets(psz, sizeof(psz), filein))
{
CAddress addr(psz, NODE_NETWORK);
if (addr.ip != 0)
AddAddress(*this, addr);
}
}
catch (...) { }
}
// Get cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
return false;
loop
{
// Read next record
CDataStream ssKey;
CDataStream ssValue;
int ret = ReadAtCursor(pcursor, ssKey, ssValue);
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
string strType;
ssKey >> strType;
if (strType == "addr")
{
CAddress addr;
ssValue >> addr;
mapAddresses.insert(make_pair(addr.GetKey(), addr));
}
}
//// debug print
printf("mapAddresses:\n");
foreach(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
item.second.print();
printf("-----\n");
}
return true;
}
bool LoadAddresses()
{
return CAddrDB("cr+").LoadAddresses();
}
//
// CReviewDB
//
bool CReviewDB::ReadReviews(uint256 hash, vector<CReview>& vReviews)
{
vReviews.size(); // msvc workaround, just need to do anything with vReviews
return Read(make_pair(string("reviews"), hash), vReviews);
}
bool CReviewDB::WriteReviews(uint256 hash, const vector<CReview>& vReviews)
{
return Write(make_pair(string("reviews"), hash), vReviews);
}
//
// CWalletDB
//
bool CWalletDB::LoadWallet(vector<unsigned char>& vchDefaultKeyRet)
{
vchDefaultKeyRet.clear();
//// todo: shouldn't we catch exceptions and try to recover and continue?
CRITICAL_BLOCK(cs_mapKeys)
CRITICAL_BLOCK(cs_mapWallet)
{
// Get cursor
Dbc* pcursor = GetCursor();
if (!pcursor)
return false;
loop
{
// Read next record
CDataStream ssKey;
CDataStream ssValue;
int ret = ReadAtCursor(pcursor, ssKey, ssValue);
if (ret == DB_NOTFOUND)
break;
else if (ret != 0)
return false;
// Unserialize
// Taking advantage of the fact that pair serialization
// is just the two items serialized one after the other
string strType;
ssKey >> strType;
if (strType == "name")
{
string strAddress;
ssKey >> strAddress;
ssValue >> mapAddressBook[strAddress];
}
else if (strType == "tx")
{
uint256 hash;
ssKey >> hash;
CWalletTx& wtx = mapWallet[hash];
ssValue >> wtx;
if (wtx.GetHash() != hash)
printf("Error in wallet.dat, hash mismatch\n");
//// debug print
//printf("LoadWallet %s\n", wtx.GetHash().ToString().c_str());
//printf(" %12I64d %s %s %s\n",
// wtx.vout[0].nValue,
// DateTimeStr(wtx.nTime).c_str(),
// wtx.hashBlock.ToString().substr(0,14).c_str(),
// wtx.mapValue["message"].c_str());
}
else if (strType == "key")
{
vector<unsigned char> vchPubKey;
ssKey >> vchPubKey;
CPrivKey vchPrivKey;
ssValue >> vchPrivKey;
mapKeys[vchPubKey] = vchPrivKey;
mapPubKeys[Hash160(vchPubKey)] = vchPubKey;
}
else if (strType == "defaultkey")
{
ssValue >> vchDefaultKeyRet;
}
else if (strType == "setting") /// or settings or option or options or config?
{
string strKey;
ssKey >> strKey;
if (strKey == "fGenerateBitcoins") ssValue >> fGenerateBitcoins;
if (strKey == "nTransactionFee") ssValue >> nTransactionFee;
if (strKey == "addrIncoming") ssValue >> addrIncoming;
}
}
}
printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);
printf("nTransactionFee = %I64d\n", nTransactionFee);
printf("addrIncoming = %s\n", addrIncoming.ToString().c_str());
return true;
}
bool LoadWallet()
{
vector<unsigned char> vchDefaultKey;
if (!CWalletDB("cr").LoadWallet(vchDefaultKey))
return false;
if (mapKeys.count(vchDefaultKey))
{
// Set keyUser
keyUser.SetPubKey(vchDefaultKey);
keyUser.SetPrivKey(mapKeys[vchDefaultKey]);
}
else
{
// Create new keyUser and set as default key
keyUser.MakeNewKey();
if (!AddKey(keyUser))
return false;
if (!SetAddressBookName(PubKeyToAddress(keyUser.GetPubKey()), "Your Address"))
return false;
CWalletDB().WriteDefaultKey(keyUser.GetPubKey());
}
return true;
}