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- // ECOin - Copyright (c) - 2014/2024 - GPLv3 - epsylon@riseup.net (https://03c8.net)
- #include <map>
- #include <boost/version.hpp>
- #include <boost/filesystem.hpp>
- #include <boost/filesystem/fstream.hpp>
- #include <leveldb/env.h>
- #include <leveldb/cache.h>
- #include <leveldb/filter_policy.h>
- #include <memenv/memenv.h>
- #include "kernel.h"
- #include "checkpoints.h"
- #include "txdb.h"
- #include "util.h"
- #include "main.h"
- using namespace std;
- using namespace boost;
- leveldb::DB *txdb; // global pointer for LevelDB object instance
- static leveldb::Options GetOptions() {
- leveldb::Options options;
- int nCacheSizeMB = GetArg("-dbcache", 25);
- options.block_cache = leveldb::NewLRUCache(nCacheSizeMB * 1048576);
- options.filter_policy = leveldb::NewBloomFilterPolicy(10);
- return options;
- }
- void init_blockindex(leveldb::Options& options, bool fRemoveOld = false) {
- // First time init.
- boost::filesystem::path directory = GetDataDir() / "txleveldb";
- if (fRemoveOld) {
- boost::filesystem::remove_all(directory); // remove directory
- unsigned int nFile = 1;
- while (true)
- {
- boost::filesystem::path strBlockFile = GetDataDir() / strprintf("blk%04u.dat", nFile);
- // Break if no such file
- if( !boost::filesystem::exists( strBlockFile ) )
- break;
- boost::filesystem::remove(strBlockFile);
- nFile++;
- }
- }
- boost::filesystem::create_directory(directory);
- printf("Opening LevelDB in %s\n", directory.string().c_str());
- leveldb::Status status = leveldb::DB::Open(options, directory.string(), &txdb);
- if (!status.ok()) {
- throw runtime_error(strprintf("init_blockindex(): error opening database environment %s", status.ToString().c_str()));
- }
- }
- CTxDB::CTxDB(const char* pszMode)
- {
- assert(pszMode);
- activeBatch = NULL;
- fReadOnly = (!strchr(pszMode, '+') && !strchr(pszMode, 'w'));
- if (txdb) {
- pdb = txdb;
- return;
- }
- bool fCreate = strchr(pszMode, 'c');
- options = GetOptions();
- options.create_if_missing = fCreate;
- options.filter_policy = leveldb::NewBloomFilterPolicy(10);
- init_blockindex(options); // Init directory
- pdb = txdb;
- if (Exists(string("version")))
- {
- ReadVersion(nVersion);
- printf("Transaction index version is %d\n", nVersion);
- if (nVersion < DATABASE_VERSION)
- {
- printf("Required index version is %d, removing old database\n", DATABASE_VERSION);
- // Leveldb instance destruction
- delete txdb;
- txdb = pdb = NULL;
- delete activeBatch;
- activeBatch = NULL;
- init_blockindex(options, true); // Remove directory and create new database
- pdb = txdb;
- bool fTmp = fReadOnly;
- fReadOnly = false;
- WriteVersion(DATABASE_VERSION); // Save transaction index version
- fReadOnly = fTmp;
- }
- }
- else if (fCreate)
- {
- bool fTmp = fReadOnly;
- fReadOnly = false;
- WriteVersion(DATABASE_VERSION);
- fReadOnly = fTmp;
- }
- printf("Opened LevelDB successfully\n");
- }
- void CTxDB::Close()
- {
- delete txdb;
- txdb = pdb = NULL;
- delete options.filter_policy;
- options.filter_policy = NULL;
- delete options.block_cache;
- options.block_cache = NULL;
- delete activeBatch;
- activeBatch = NULL;
- }
- bool CTxDB::TxnBegin()
- {
- assert(!activeBatch);
- activeBatch = new leveldb::WriteBatch();
- return true;
- }
- bool CTxDB::TxnCommit()
- {
- assert(activeBatch);
- leveldb::Status status = pdb->Write(leveldb::WriteOptions(), activeBatch);
- delete activeBatch;
- activeBatch = NULL;
- if (!status.ok()) {
- printf("LevelDB batch commit failure: %s\n", status.ToString().c_str());
- return false;
- }
- return true;
- }
- class CBatchScanner : public leveldb::WriteBatch::Handler {
- public:
- std::string needle;
- bool *deleted;
- std::string *foundValue;
- bool foundEntry;
- CBatchScanner() : foundEntry(false) {}
- virtual void Put(const leveldb::Slice& key, const leveldb::Slice& value) {
- if (key.ToString() == needle) {
- foundEntry = true;
- *deleted = false;
- *foundValue = value.ToString();
- }
- }
- virtual void Delete(const leveldb::Slice& key) {
- if (key.ToString() == needle) {
- foundEntry = true;
- *deleted = true;
- }
- }
- };
- bool CTxDB::ScanBatch(const CDataStream &key, string *value, bool *deleted) const {
- assert(activeBatch);
- *deleted = false;
- CBatchScanner scanner;
- scanner.needle = key.str();
- scanner.deleted = deleted;
- scanner.foundValue = value;
- leveldb::Status status = activeBatch->Iterate(&scanner);
- if (!status.ok()) {
- throw runtime_error(status.ToString());
- }
- return scanner.foundEntry;
- }
- 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::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::ReadHashBestChain(uint256& hashBestChain)
- {
- return Read(string("hashBestChain"), hashBestChain);
- }
- bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
- {
- return Write(string("hashBestChain"), hashBestChain);
- }
- bool CTxDB::ReadBestInvalidTrust(CBigNum& bnBestInvalidTrust)
- {
- return Read(string("bnBestInvalidTrust"), bnBestInvalidTrust);
- }
- bool CTxDB::WriteBestInvalidTrust(CBigNum bnBestInvalidTrust)
- {
- return Write(string("bnBestInvalidTrust"), bnBestInvalidTrust);
- }
- bool CTxDB::ReadSyncCheckpoint(uint256& hashCheckpoint)
- {
- return Read(string("hashSyncCheckpoint"), hashCheckpoint);
- }
- bool CTxDB::WriteSyncCheckpoint(uint256 hashCheckpoint)
- {
- return Write(string("hashSyncCheckpoint"), hashCheckpoint);
- }
- bool CTxDB::ReadCheckpointPubKey(string& strPubKey)
- {
- return Read(string("strCheckpointPubKey"), strPubKey);
- }
- bool CTxDB::WriteCheckpointPubKey(const string& strPubKey)
- {
- return Write(string("strCheckpointPubKey"), strPubKey);
- }
- static 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()
- {
- if (mapBlockIndex.size() > 0) {
- // Already loaded once in this session. It can happen during migration
- // from BDB.
- return true;
- }
- leveldb::Iterator *iterator = pdb->NewIterator(leveldb::ReadOptions());
- // Seek to start key.
- CDataStream ssStartKey(SER_DISK, CLIENT_VERSION);
- ssStartKey << make_pair(string("blockindex"), uint256(0));
- iterator->Seek(ssStartKey.str());
- // Now read each entry.
- while (iterator->Valid())
- {
- // Unpack keys and values.
- CDataStream ssKey(SER_DISK, CLIENT_VERSION);
- ssKey.write(iterator->key().data(), iterator->key().size());
- CDataStream ssValue(SER_DISK, CLIENT_VERSION);
- ssValue.write(iterator->value().data(), iterator->value().size());
- string strType;
- ssKey >> strType;
- // Did we reach the end of the data to read?
- if (fRequestShutdown || strType != "blockindex")
- break;
- CDiskBlockIndex diskindex;
- ssValue >> diskindex;
- uint256 blockHash = diskindex.GetBlockHash();
- // Construct block index object
- CBlockIndex* pindexNew = InsertBlockIndex(blockHash);
- pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
- pindexNew->pnext = InsertBlockIndex(diskindex.hashNext);
- pindexNew->nFile = diskindex.nFile;
- pindexNew->nBlockPos = diskindex.nBlockPos;
- pindexNew->nHeight = diskindex.nHeight;
- pindexNew->nMint = diskindex.nMint;
- pindexNew->nMoneySupply = diskindex.nMoneySupply;
- pindexNew->nFlags = diskindex.nFlags;
- pindexNew->nStakeModifier = diskindex.nStakeModifier;
- pindexNew->prevoutStake = diskindex.prevoutStake;
- pindexNew->nStakeTime = diskindex.nStakeTime;
- pindexNew->hashProofOfStake = diskindex.hashProofOfStake;
- pindexNew->nVersion = diskindex.nVersion;
- pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
- pindexNew->nTime = diskindex.nTime;
- pindexNew->nBits = diskindex.nBits;
- pindexNew->nNonce = diskindex.nNonce;
- // Watch for genesis block
- if (pindexGenesisBlock == NULL && blockHash == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
- pindexGenesisBlock = pindexNew;
- if (!pindexNew->CheckIndex()) {
- delete iterator;
- return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
- }
- // Ecoin: build setStakeSeen
- if (pindexNew->IsProofOfStake())
- setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
- iterator->Next();
- }
- delete iterator;
- if (fRequestShutdown)
- return true;
- // Calculate nChainTrust
- vector<pair<int, CBlockIndex*> > vSortedByHeight;
- vSortedByHeight.reserve(mapBlockIndex.size());
- BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
- {
- CBlockIndex* pindex = item.second;
- vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
- }
- sort(vSortedByHeight.begin(), vSortedByHeight.end());
- BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
- {
- CBlockIndex* pindex = item.second;
- pindex->nChainTrust = (pindex->pprev ? pindex->pprev->nChainTrust : 0) + pindex->GetBlockTrust();
- // Ecoin: calculate stake modifier checksum
- pindex->nStakeModifierChecksum = GetStakeModifierChecksum(pindex);
- if (!CheckStakeModifierCheckpoints(pindex->nHeight, pindex->nStakeModifierChecksum))
- return error("CTxDB::LoadBlockIndex() : Failed stake modifier checkpoint height=%d, modifier=0x%016" PRI64x, pindex->nHeight, pindex->nStakeModifier);
- }
- // Load hashBestChain pointer to end of best chain
- if (!ReadHashBestChain(hashBestChain))
- {
- if (pindexGenesisBlock == NULL)
- return true;
- return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
- }
- if (!mapBlockIndex.count(hashBestChain))
- return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
- pindexBest = mapBlockIndex[hashBestChain];
- nBestHeight = pindexBest->nHeight;
- nBestChainTrust = pindexBest->nChainTrust;
- printf("LoadBlockIndex(): hashBestChain=%s height=%d trust=%s date=%s\n",
- hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, CBigNum(nBestChainTrust).ToString().c_str(),
- DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
- // Ecoin: load hashSyncCheckpoint
- if (!ReadSyncCheckpoint(Checkpoints::hashSyncCheckpoint))
- return error("CTxDB::LoadBlockIndex() : hashSyncCheckpoint not loaded");
- printf("LoadBlockIndex(): synchronized checkpoint %s\n", Checkpoints::hashSyncCheckpoint.ToString().c_str());
- // Load bnBestInvalidTrust, OK if it doesn't exist
- CBigNum bnBestInvalidTrust;
- ReadBestInvalidTrust(bnBestInvalidTrust);
- nBestInvalidTrust = bnBestInvalidTrust.getuint256();
- // Verify blocks in the best chain
- int nCheckLevel = GetArg("-checklevel", 1);
- int nCheckDepth = GetArg( "-checkblocks", 2500);
- if (nCheckDepth == 0)
- nCheckDepth = 1000000000; // suffices until the year 19000
- if (nCheckDepth > nBestHeight)
- nCheckDepth = nBestHeight;
- printf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
- CBlockIndex* pindexFork = NULL;
- map<pair<unsigned int, unsigned int>, CBlockIndex*> mapBlockPos;
- for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
- {
- if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth)
- break;
- CBlock block;
- if (!block.ReadFromDisk(pindex))
- return error("LoadBlockIndex() : block.ReadFromDisk failed");
- // check level 1: verify block validity
- // check level 7: verify block signature too
- if (nCheckLevel>0 && !block.CheckBlock(true, true, (nCheckLevel>6)))
- {
- printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
- pindexFork = pindex->pprev;
- }
- // check level 2: verify transaction index validity
- if (nCheckLevel>1)
- {
- pair<unsigned int, unsigned int> pos = make_pair(pindex->nFile, pindex->nBlockPos);
- mapBlockPos[pos] = pindex;
- BOOST_FOREACH(const CTransaction &tx, block.vtx)
- {
- uint256 hashTx = tx.GetHash();
- CTxIndex txindex;
- if (ReadTxIndex(hashTx, txindex))
- {
- // check level 3: checker transaction hashes
- if (nCheckLevel>2 || pindex->nFile != txindex.pos.nFile || pindex->nBlockPos != txindex.pos.nBlockPos)
- {
- // either an error or a duplicate transaction
- CTransaction txFound;
- if (!txFound.ReadFromDisk(txindex.pos))
- {
- printf("LoadBlockIndex() : *** cannot read mislocated transaction %s\n", hashTx.ToString().c_str());
- pindexFork = pindex->pprev;
- }
- else
- if (txFound.GetHash() != hashTx) // not a duplicate tx
- {
- printf("LoadBlockIndex(): *** invalid tx position for %s\n", hashTx.ToString().c_str());
- pindexFork = pindex->pprev;
- }
- }
- // check level 4: check whether spent txouts were spent within the main chain
- unsigned int nOutput = 0;
- if (nCheckLevel>3)
- {
- BOOST_FOREACH(const CDiskTxPos &txpos, txindex.vSpent)
- {
- if (!txpos.IsNull())
- {
- pair<unsigned int, unsigned int> posFind = make_pair(txpos.nFile, txpos.nBlockPos);
- if (!mapBlockPos.count(posFind))
- {
- printf("LoadBlockIndex(): *** found bad spend at %d, hashBlock=%s, hashTx=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str(), hashTx.ToString().c_str());
- pindexFork = pindex->pprev;
- }
- // check level 6: check whether spent txouts were spent by a valid transaction that consume them
- if (nCheckLevel>5)
- {
- CTransaction txSpend;
- if (!txSpend.ReadFromDisk(txpos))
- {
- printf("LoadBlockIndex(): *** cannot read spending transaction of %s:%i from disk\n", hashTx.ToString().c_str(), nOutput);
- pindexFork = pindex->pprev;
- }
- else if (!txSpend.CheckTransaction())
- {
- printf("LoadBlockIndex(): *** spending transaction of %s:%i is invalid\n", hashTx.ToString().c_str(), nOutput);
- pindexFork = pindex->pprev;
- }
- else
- {
- bool fFound = false;
- BOOST_FOREACH(const CTxIn &txin, txSpend.vin)
- if (txin.prevout.hash == hashTx && txin.prevout.n == nOutput)
- fFound = true;
- if (!fFound)
- {
- printf("LoadBlockIndex(): *** spending transaction of %s:%i does not spend it\n", hashTx.ToString().c_str(), nOutput);
- pindexFork = pindex->pprev;
- }
- }
- }
- }
- nOutput++;
- }
- }
- }
- // check level 5: check whether all prevouts are marked spent
- if (nCheckLevel>4)
- {
- BOOST_FOREACH(const CTxIn &txin, tx.vin)
- {
- CTxIndex txindex;
- if (ReadTxIndex(txin.prevout.hash, txindex))
- if (txindex.vSpent.size()-1 < txin.prevout.n || txindex.vSpent[txin.prevout.n].IsNull())
- {
- printf("LoadBlockIndex(): *** found unspent prevout %s:%i in %s\n", txin.prevout.hash.ToString().c_str(), txin.prevout.n, hashTx.ToString().c_str());
- pindexFork = pindex->pprev;
- }
- }
- }
- }
- }
- }
- if (pindexFork && !fRequestShutdown)
- {
- // Reorg back to the fork
- printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
- CBlock block;
- if (!block.ReadFromDisk(pindexFork))
- return error("LoadBlockIndex() : block.ReadFromDisk failed");
- CTxDB txdb;
- block.SetBestChain(txdb, pindexFork);
- }
- return true;
- }
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