1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2012 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
8 #include "checkpoints.h"
12 #include <boost/version.hpp>
13 #include <boost/filesystem.hpp>
14 #include <boost/filesystem/fstream.hpp>
21 using namespace boost;
27 bool CTxDB::ReadTxIndex(uint256 hash, CTxIndex& txindex)
31 return Read(make_pair(string("tx"), hash), txindex);
34 bool CTxDB::UpdateTxIndex(uint256 hash, const CTxIndex& txindex)
37 return Write(make_pair(string("tx"), hash), txindex);
40 bool CTxDB::AddTxIndex(const CTransaction& tx, const CDiskTxPos& pos, int nHeight)
45 uint256 hash = tx.GetHash();
46 CTxIndex txindex(pos, tx.vout.size());
47 return Write(make_pair(string("tx"), hash), txindex);
50 bool CTxDB::EraseTxIndex(const CTransaction& tx)
53 uint256 hash = tx.GetHash();
55 return Erase(make_pair(string("tx"), hash));
58 bool CTxDB::ContainsTx(uint256 hash)
61 return Exists(make_pair(string("tx"), hash));
64 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx, CTxIndex& txindex)
68 if (!ReadTxIndex(hash, txindex))
70 return (tx.ReadFromDisk(txindex.pos));
73 bool CTxDB::ReadDiskTx(uint256 hash, CTransaction& tx)
76 return ReadDiskTx(hash, tx, txindex);
79 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx, CTxIndex& txindex)
81 return ReadDiskTx(outpoint.hash, tx, txindex);
84 bool CTxDB::ReadDiskTx(COutPoint outpoint, CTransaction& tx)
87 return ReadDiskTx(outpoint.hash, tx, txindex);
90 bool CTxDB::WriteBlockIndex(const CDiskBlockIndex& blockindex)
92 return Write(make_pair(string("blockindex"), blockindex.GetBlockHash()), blockindex);
95 bool CTxDB::ReadHashBestChain(uint256& hashBestChain)
97 return Read(string("hashBestChain"), hashBestChain);
100 bool CTxDB::WriteHashBestChain(uint256 hashBestChain)
102 return Write(string("hashBestChain"), hashBestChain);
105 bool CTxDB::ReadBestInvalidTrust(CBigNum& bnBestInvalidTrust)
107 return Read(string("bnBestInvalidTrust"), bnBestInvalidTrust);
110 bool CTxDB::WriteBestInvalidTrust(CBigNum bnBestInvalidTrust)
112 return Write(string("bnBestInvalidTrust"), bnBestInvalidTrust);
115 bool CTxDB::ReadSyncCheckpoint(uint256& hashCheckpoint)
117 return Read(string("hashSyncCheckpoint"), hashCheckpoint);
120 bool CTxDB::WriteSyncCheckpoint(uint256 hashCheckpoint)
122 return Write(string("hashSyncCheckpoint"), hashCheckpoint);
125 bool CTxDB::ReadCheckpointPubKey(string& strPubKey)
127 return Read(string("strCheckpointPubKey"), strPubKey);
130 bool CTxDB::WriteCheckpointPubKey(const string& strPubKey)
132 return Write(string("strCheckpointPubKey"), strPubKey);
135 bool CTxDB::ReadModifierUpgradeTime(unsigned int& nUpgradeTime)
137 return Read(string("nUpgradeTime"), nUpgradeTime);
140 bool CTxDB::WriteModifierUpgradeTime(const unsigned int& nUpgradeTime)
142 return Write(string("nUpgradeTime"), nUpgradeTime);
145 CBlockIndex static * InsertBlockIndex(uint256 hash)
151 auto mi = mapBlockIndex.find(hash);
152 if (mi != mapBlockIndex.end())
156 auto pindexNew = new(nothrow) CBlockIndex();
158 throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
159 mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
160 pindexNew->phashBlock = &((*mi).first);
165 bool CTxDB::LoadBlockIndex()
167 if (!LoadBlockIndexGuts())
170 if (fRequestShutdown)
173 // Calculate nChainTrust
174 vector<pair<int, CBlockIndex*> > vSortedByHeight;
175 vSortedByHeight.reserve(mapBlockIndex.size());
176 for(const auto& item : mapBlockIndex)
178 auto pindex = item.second;
179 vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
181 sort(vSortedByHeight.begin(), vSortedByHeight.end());
182 for(const auto& item : vSortedByHeight)
184 auto pindex = item.second;
185 pindex->nChainTrust = (pindex->pprev ? pindex->pprev->nChainTrust : 0) + pindex->GetBlockTrust();
186 // ppcoin: calculate stake modifier checksum
187 pindex->nStakeModifierChecksum = GetStakeModifierChecksum(pindex);
188 if (!CheckStakeModifierCheckpoints(pindex->nHeight, pindex->nStakeModifierChecksum))
189 return error("CTxDB::LoadBlockIndex() : Failed stake modifier checkpoint height=%d, modifier=0x%016" PRIx64, pindex->nHeight, pindex->nStakeModifier);
192 // Load hashBestChain pointer to end of best chain
193 if (!ReadHashBestChain(hashBestChain))
195 if (pindexGenesisBlock == NULL)
197 return error("CTxDB::LoadBlockIndex() : hashBestChain not loaded");
199 if (!mapBlockIndex.count(hashBestChain))
200 return error("CTxDB::LoadBlockIndex() : hashBestChain not found in the block index");
201 pindexBest = mapBlockIndex[hashBestChain];
202 nBestHeight = pindexBest->nHeight;
203 nBestChainTrust = pindexBest->nChainTrust;
204 printf("LoadBlockIndex(): hashBestChain=%s height=%d trust=%s date=%s\n",
205 hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, CBigNum(nBestChainTrust).ToString().c_str(),
206 DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
208 // ppcoin: load hashSyncCheckpoint
209 if (!ReadSyncCheckpoint(Checkpoints::hashSyncCheckpoint))
210 return error("CTxDB::LoadBlockIndex() : hashSyncCheckpoint not loaded");
211 printf("LoadBlockIndex(): synchronized checkpoint %s\n", Checkpoints::hashSyncCheckpoint.ToString().c_str());
213 // Load bnBestInvalidTrust, OK if it doesn't exist
214 CBigNum bnBestInvalidTrust;
215 ReadBestInvalidTrust(bnBestInvalidTrust);
216 nBestInvalidTrust = bnBestInvalidTrust.getuint256();
218 // Verify blocks in the best chain
219 int nCheckLevel = GetArgInt("-checklevel", 1);
220 int nCheckDepth = GetArgInt( "-checkblocks", 192);
221 if (nCheckDepth == 0)
222 nCheckDepth = 1000000000; // suffices until the year 19000
223 if (nCheckDepth > nBestHeight)
224 nCheckDepth = nBestHeight;
225 printf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
226 CBlockIndex* pindexFork = NULL;
227 map<pair<unsigned int, unsigned int>, CBlockIndex*> mapBlockPos;
228 for (auto pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
230 if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth)
233 if (!block.ReadFromDisk(pindex))
234 return error("LoadBlockIndex() : block.ReadFromDisk failed");
235 // check level 1: verify block validity
236 // check level 7: verify block signature too
237 if (nCheckLevel>0 && !block.CheckBlock(true, true, (nCheckLevel>6)))
239 printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
240 pindexFork = pindex->pprev;
242 // check level 2: verify transaction index validity
245 auto pos = make_pair(pindex->nFile, pindex->nBlockPos);
246 mapBlockPos[pos] = pindex;
247 for(const auto &tx : block.vtx)
249 auto hashTx = tx.GetHash();
251 if (ReadTxIndex(hashTx, txindex))
253 // check level 3: checker transaction hashes
254 if (nCheckLevel>2 || pindex->nFile != txindex.pos.nFile || pindex->nBlockPos != txindex.pos.nBlockPos)
256 // either an error or a duplicate transaction
257 CTransaction txFound;
258 if (!txFound.ReadFromDisk(txindex.pos))
260 printf("LoadBlockIndex() : *** cannot read mislocated transaction %s\n", hashTx.ToString().c_str());
261 pindexFork = pindex->pprev;
264 if (txFound.GetHash() != hashTx) // not a duplicate tx
266 printf("LoadBlockIndex(): *** invalid tx position for %s\n", hashTx.ToString().c_str());
267 pindexFork = pindex->pprev;
270 // check level 4: check whether spent txouts were spent within the main chain
271 unsigned int nOutput = 0;
274 for(const CDiskTxPos &txpos : txindex.vSpent)
278 auto posFind = make_pair(txpos.nFile, txpos.nBlockPos);
279 if (!mapBlockPos.count(posFind))
281 printf("LoadBlockIndex(): *** found bad spend at %d, hashBlock=%s, hashTx=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str(), hashTx.ToString().c_str());
282 pindexFork = pindex->pprev;
284 // check level 6: check whether spent txouts were spent by a valid transaction that consume them
287 CTransaction txSpend;
288 if (!txSpend.ReadFromDisk(txpos))
290 printf("LoadBlockIndex(): *** cannot read spending transaction of %s:%i from disk\n", hashTx.ToString().c_str(), nOutput);
291 pindexFork = pindex->pprev;
293 else if (!txSpend.CheckTransaction())
295 printf("LoadBlockIndex(): *** spending transaction of %s:%i is invalid\n", hashTx.ToString().c_str(), nOutput);
296 pindexFork = pindex->pprev;
301 for(const CTxIn &txin : txSpend.vin)
302 if (txin.prevout.hash == hashTx && txin.prevout.n == nOutput)
306 printf("LoadBlockIndex(): *** spending transaction of %s:%i does not spend it\n", hashTx.ToString().c_str(), nOutput);
307 pindexFork = pindex->pprev;
316 // check level 5: check whether all prevouts are marked spent
319 for(const CTxIn &txin : tx.vin)
322 if (ReadTxIndex(txin.prevout.hash, txindex))
323 if (txindex.vSpent.size()-1 < txin.prevout.n || txindex.vSpent[txin.prevout.n].IsNull())
325 printf("LoadBlockIndex(): *** found unspent prevout %s:%i in %s\n", txin.prevout.hash.ToString().c_str(), txin.prevout.n, hashTx.ToString().c_str());
326 pindexFork = pindex->pprev;
333 if (pindexFork && !fRequestShutdown)
335 // Reorg back to the fork
336 printf("LoadBlockIndex() : *** moving best chain pointer back to block %d\n", pindexFork->nHeight);
338 if (!block.ReadFromDisk(pindexFork))
339 return error("LoadBlockIndex() : block.ReadFromDisk failed");
341 block.SetBestChain(txdb, pindexFork);
349 bool CTxDB::LoadBlockIndexGuts()
351 // Get database cursor
352 Dbc* pcursor = GetCursor();
356 // Load mapBlockIndex
357 unsigned int fFlags = DB_SET_RANGE;
361 CDataStream ssKey(SER_DISK, CLIENT_VERSION);
362 if (fFlags == DB_SET_RANGE)
363 ssKey << make_pair(string("blockindex"), uint256(0));
364 CDataStream ssValue(SER_DISK, CLIENT_VERSION);
365 int ret = ReadAtCursor(pcursor, ssKey, ssValue, fFlags);
367 if (ret == DB_NOTFOUND)
377 if (strType == "blockindex" && !fRequestShutdown)
379 CDiskBlockIndex diskindex;
380 ssValue >> diskindex;
382 uint256 blockHash = diskindex.GetBlockHash();
384 // Construct block index object
385 CBlockIndex* pindexNew = InsertBlockIndex(blockHash);
386 pindexNew->pprev = InsertBlockIndex(diskindex.hashPrev);
387 pindexNew->pnext = InsertBlockIndex(diskindex.hashNext);
388 pindexNew->nFile = diskindex.nFile;
389 pindexNew->nBlockPos = diskindex.nBlockPos;
390 pindexNew->nHeight = diskindex.nHeight;
391 pindexNew->nMint = diskindex.nMint;
392 pindexNew->nMoneySupply = diskindex.nMoneySupply;
393 pindexNew->nFlags = diskindex.nFlags;
394 pindexNew->nStakeModifier = diskindex.nStakeModifier;
395 pindexNew->prevoutStake = diskindex.prevoutStake;
396 pindexNew->nStakeTime = diskindex.nStakeTime;
397 pindexNew->hashProofOfStake = diskindex.hashProofOfStake;
398 pindexNew->nVersion = diskindex.nVersion;
399 pindexNew->hashMerkleRoot = diskindex.hashMerkleRoot;
400 pindexNew->nTime = diskindex.nTime;
401 pindexNew->nBits = diskindex.nBits;
402 pindexNew->nNonce = diskindex.nNonce;
404 // Watch for genesis block
405 if (pindexGenesisBlock == NULL && blockHash == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet))
406 pindexGenesisBlock = pindexNew;
408 if (!pindexNew->CheckIndex())
409 return error("LoadBlockIndex() : CheckIndex failed at %d", pindexNew->nHeight);
411 // ppcoin: build setStakeSeen
412 if (pindexNew->IsProofOfStake())
413 setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
417 break; // if shutdown requested or finished loading block index
420 catch (const std::exception&) {
421 return error("%s() : deserialize error", BOOST_CURRENT_FUNCTION);