map<COutPoint, CInPoint> mapNextTx;
map<uint256, CBlockIndex*> mapBlockIndex;
-set<COutPoint> setStakeSeen;
-uint256 hashGenesisBlock("0x000000006d52486334316794cc38ffeb7ebf35a7ebd661fd39f5f46b0d001575");
+set<pair<COutPoint, unsigned int> > setStakeSeen;
+uint256 hashGenesisBlock("0x000000007c82d1f0aa2896b01bf533a8cc26a1f44790be4ceb4ecde7bee24add");
static CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
const int nInitialBlockThreshold = 120; // Regard blocks up until N-threshold as "initial download"
CBlockIndex* pindexGenesisBlock = NULL;
map<uint256, CBlock*> mapOrphanBlocks;
multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
-set<COutPoint> setStakeSeenOrphan;
+set<pair<COutPoint, unsigned int> > setStakeSeenOrphan;
map<uint256, CDataStream*> mapOrphanTransactions;
multimap<uint256, CDataStream*> mapOrphanTransactionsByPrev;
if (!CheckBlock())
return false;
- // ppcoin: coin stake tx must meet target protocol
- if (IsProofOfStake() && !vtx[1].CheckProofOfStake(txdb, nBits))
- return error("ConnectBlock() : Block %s unable to meet hash target for coinstake", GetHash().ToString().c_str());
-
//// issue here: it doesn't know the version
unsigned int nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK) - (2 * GetSizeOfCompactSize(0)) + GetSizeOfCompactSize(vtx.size());
// quantities so as to generate blocks faster, degrading the system back into
// a proof-of-work situation.
//
-bool CTransaction::CheckProofOfStake(CTxDB& txdb, unsigned int nBits) const
+bool CTransaction::CheckProofOfStake(unsigned int nBits) const
{
CBigNum bnTargetPerCoinDay;
bnTargetPerCoinDay.SetCompact(nBits);
const CTxIn& txin = vin[0];
// First try finding the previous transaction in database
+ CTxDB txdb("r");
CTransaction txPrev;
CTxIndex txindex;
if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
return false; // previous transaction not in main chain
+ txdb.Close();
if (nTime < txPrev.nTime)
return false; // Transaction timestamp violation
+ // Verify signature
+ if (!VerifySignature(txPrev, *this, 0))
+ return DoS(100, error("CheckProofOfStake() : VerifySignature failed on coinstake %s", GetHash().ToString().c_str()));
+
// Read block header
CBlock block;
if (!block.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos, false))
if (CBigNum(Hash(ss.begin(), ss.end())) <= bnCoinDay * bnTargetPerCoinDay)
return true;
else
- return false;
+ return DoS(100, error("CheckProofOfStake() : check target failed on coinstake %s", GetHash().ToString().c_str()));
}
// ppcoin: total coin age spent in transaction, in the unit of coin-days.
return error("AddToBlockIndex() : new CBlockIndex failed");
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
if (pindexNew->fProofOfStake)
- setStakeSeen.insert(pindexNew->prevoutStake);
+ setStakeSeen.insert(make_pair(pindexNew->prevoutStake, pindexNew->nStakeTime));
pindexNew->phashBlock = &((*mi).first);
map<uint256, CBlockIndex*>::iterator miPrev = mapBlockIndex.find(hashPrevBlock);
if (GetBlockTime() > (int64)vtx[0].nTime + nMaxClockDrift)
return DoS(50, error("CheckBlock() : coinbase timestamp is too early"));
+ // Check coinstake timestamp
+ if (IsProofOfStake() && GetBlockTime() > (int64)vtx[1].nTime + nMaxClockDrift)
+ return DoS(50, error("CheckBlock() : coinstake timestamp is too early"));
+
// Check transactions
BOOST_FOREACH(const CTransaction& tx, vtx)
{
if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 140700))
pnode->PushInventory(CInv(MSG_BLOCK, hash));
+ // ppcoin: check pending sync-checkpoint
+ Checkpoints::AcceptPendingSyncCheckpoint(hash);
+
return true;
}
// Limited duplicity on stake: prevents block flood attack
// Duplicate stake allowed only when there is orphan child block
if (pblock->IsProofOfStake() && setStakeSeen.count(pblock->GetProofOfStake()) && !mapOrphanBlocksByPrev.count(hash))
- return error("ProcessBlock() : duplicate proof-of-stake (%s) for block %s", pblock->GetProofOfStake().ToString().c_str(), hash.ToString().c_str());
+ return error("ProcessBlock() : duplicate proof-of-stake (%s, %d) for block %s", pblock->GetProofOfStake().first.ToString().c_str(), pblock->GetProofOfStake().second, hash.ToString().c_str());
// Preliminary checks
if (!pblock->CheckBlock())
return error("ProcessBlock() : CheckBlock FAILED");
+ // ppcoin: verify hash target and signature of coinstake tx
+ if (pblock->IsProofOfStake() && !pblock->vtx[1].CheckProofOfStake(pblock->nBits))
+ return error("ProcessBlock() : check proof-of-stake failed for block %s", hash.ToString().c_str());
+
CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex);
if (pcheckpoint && pblock->hashPrevBlock != hashBestChain)
{
CBigNum bnNewBlock;
bnNewBlock.SetCompact(pblock->nBits);
CBigNum bnRequired;
- bnRequired.SetCompact(ComputeMinWork(pcheckpoint->nBits, deltaTime));
- if (pblock->IsProofOfWork() && bnNewBlock > bnRequired)
+ if (pblock->IsProofOfWork())
+ bnRequired.SetCompact(ComputeMinWork(pcheckpoint->nBits, deltaTime));
+ else
+ bnRequired = bnNewBlock; // TODO: Computer Min Stake Target Allowed
+
+ if (bnNewBlock > bnRequired)
{
pfrom->Misbehaving(100);
- return error("ProcessBlock() : block with too little proof-of-work");
+ return error("ProcessBlock() : block with too little %s", pblock->IsProofOfStake()? "proof-of-stake" : "proof-of-work");
}
}
// Limited duplicity on stake: prevents block flood attack
// Duplicate stake allowed only when there is orphan child block
if (setStakeSeenOrphan.count(pblock2->GetProofOfStake()) && !mapOrphanBlocksByPrev.count(hash))
- return error("ProcessBlock() : duplicate proof-of-stake (%s) for orphan block %s", pblock2->GetProofOfStake().ToString().c_str(), hash.ToString().c_str());
+ return error("ProcessBlock() : duplicate proof-of-stake (%s, %d) for orphan block %s", pblock2->GetProofOfStake().first.ToString().c_str(), pblock2->GetProofOfStake().second, hash.ToString().c_str());
else
setStakeSeenOrphan.insert(pblock2->GetProofOfStake());
}
// Genesis block
const char* pszTimestamp = "MarketWatch 07/Nov/2011 Gold tops $1,790 to end at over six-week high";
CTransaction txNew;
- txNew.nTime = 1325878371;
+ txNew.nTime = 1339538219;
txNew.vin.resize(1);
txNew.vout.resize(1);
txNew.vin[0].scriptSig = CScript() << 486604799 << CBigNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
- txNew.vout[0].nValue = GetProofOfWorkReward(bnProofOfWorkLimit.GetCompact());
- txNew.vout[0].scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
+ txNew.vout[0].SetEmpty();
CBlock block;
block.vtx.push_back(txNew);
block.hashPrevBlock = 0;
block.hashMerkleRoot = block.BuildMerkleTree();
block.nVersion = 1;
- block.nTime = 1325882536;
+ block.nTime = 1339540307;
block.nBits = bnProofOfWorkLimit.GetCompact();
- block.nNonce = 2081920190;
+ block.nNonce = 1281822831;
if (fTestNet)
{
printf("%s\n", block.GetHash().ToString().c_str());
printf("%s\n", hashGenesisBlock.ToString().c_str());
printf("%s\n", block.hashMerkleRoot.ToString().c_str());
- assert(block.hashMerkleRoot == uint256("0xc7311b56de266580cca65be108ae53d7100b5c3b17da8b1106044103abd7a521"));
+ assert(block.hashMerkleRoot == uint256("0x1557f46a17fcf8843dbe4c0c0edfd1d17eeff2c3c48d73a59d11f5d176e4b54d"));
block.print();
assert(block.GetHash() == hashGenesisBlock);
assert(block.CheckBlock());
return error("LoadBlockIndex() : writing genesis block to disk failed");
if (!block.AddToBlockIndex(nFile, nBlockPos))
return error("LoadBlockIndex() : genesis block not accepted");
+
+ // ppcoin: initialize synchronized checkpoint
+ CTxDB txdbc;
+ if (!txdbc.WriteSyncCheckpoint(hashGenesisBlock))
+ return error("LoadBlockIndex() : failed to init sync checkpoint");
+ txdbc.Close();
+ Checkpoints::hashSyncCheckpoint = hashGenesisBlock;
}
return true;
BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
item.second.RelayTo(pfrom);
+ // ppcoin: relay sync-checkpoint
+ CRITICAL_BLOCK(Checkpoints::cs_hashSyncCheckpoint)
+ if (!Checkpoints::checkpointMessage.IsNull())
+ Checkpoints::checkpointMessage.RelayTo(pfrom);
+
pfrom->fSuccessfullyConnected = true;
printf("version message: version %d, blocks=%d\n", pfrom->nVersion, pfrom->nStartingHeight);
}
}
+ else if (strCommand == "checkpoint")
+ {
+ CSyncCheckpoint checkpoint;
+ vRecv >> checkpoint;
+
+ if (checkpoint.ProcessSyncCheckpoint(pfrom))
+ {
+ // Relay
+ pfrom->hashCheckpointKnown = checkpoint.hashCheckpoint;
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ checkpoint.RelayTo(pnode);
+ }
+ }
else
{
pblock->vtx.push_back(txNew);
// ppcoin: if coinstake available add coinstake tx
- static unsigned int nLastCoinStakeCheckTime = GetAdjustedTime() - nMaxClockDrift; // only initialized at startup
+ static unsigned int nLastCoinStakeCheckTime = GetAdjustedTime() - nMaxClockDrift + 60; // only initialized at startup
CBlockIndex* pindexPrev = pindexBest;
while (nLastCoinStakeCheckTime < GetAdjustedTime())
{
CTransaction txCoinStake;
CRITICAL_BLOCK(cs)
{
- nLastCoinStakeCheckTime++;
+ // mining may have been suspended for a while so
+ // need to take max to satisfy the timestamp protocol
+ nLastCoinStakeCheckTime = max(++nLastCoinStakeCheckTime, (unsigned int) (GetAdjustedTime() - nMaxClockDrift + 60));
txCoinStake.nTime = nLastCoinStakeCheckTime;
}
if (pwallet->CreateCoinStake(pblock->nBits, txCoinStake))
git://git.novaco.in / novacoin.git / blobdiff