namespace Checkpoints
{
- struct Checkpoint
- {
- uint256 hashCheckPoint;
- unsigned int nTime;
- };
-
- typedef std::map<int, Checkpoint> MapCheckpoints;
-
- Checkpoint initCheckpoint(uint256 hashCheckPoint, unsigned int nTime)
- {
- Checkpoint item;
- item.hashCheckPoint = hashCheckPoint;
- item.nTime = nTime;
-
- return item;
- }
+ typedef std::map<int, std::pair<uint256, unsigned int> > MapCheckpoints;
//
// What makes a good checkpoint block?
//
static MapCheckpoints mapCheckpoints =
boost::assign::map_list_of
- ( 0, initCheckpoint(hashGenesisBlock, 1360105017) )
- ( 9690, initCheckpoint(uint256("0x00000000026561450859c46868099e0df6068a538f038cb18988fd8d47dcdaf5"), 1362791423) )
- ( 13560, initCheckpoint(uint256("0xa1591a0fcbf11f282d671581edb9f0aadcd06fee69761081e0a3245914c13729"), 1364674052) )
- ( 37092, initCheckpoint(uint256("0x0000000000a38c2f98556f46793b453e92d8fab2d31c0b93fd08bcf78e56099d"), 1376677203) )
- ( 44200, initCheckpoint(uint256("0xc9bda7232a18b9c1f5ff974a9e5566b2d1879ceb8fc0e9e61fba9038a25b8447"), 1380145962) )
+ ( 0, std::make_pair(hashGenesisBlock, 1360105017) )
+ ( 9690, std::make_pair(uint256("0x00000000026561450859c46868099e0df6068a538f038cb18988fd8d47dcdaf5"), 1362791423) )
+ ( 13560, std::make_pair(uint256("0xa1591a0fcbf11f282d671581edb9f0aadcd06fee69761081e0a3245914c13729"), 1364674052) )
+ ( 37092, std::make_pair(uint256("0x0000000000a38c2f98556f46793b453e92d8fab2d31c0b93fd08bcf78e56099d"), 1376677203) )
+ ( 44200, std::make_pair(uint256("0xc9bda7232a18b9c1f5ff974a9e5566b2d1879ceb8fc0e9e61fba9038a25b8447"), 1380145962) )
+ ( 65000, std::make_pair(uint256("0xfb2b51a2fd65062c98a7a6053cde46aeaefebb95ba2f680e85a29ee25b1dcf05"), 1388526385) )
+ ( 68600, std::make_pair(uint256("0xb646b0562080ab9411f85d4b2a1ca8b197c67ae170c5e328406871b44233cb06"), 1389867276) )
+ ( 92161, std::make_pair(uint256("0x000000000079090eb31e7fa55487e4e666466253e68b213f44b7977ea7a2eeec"), 1398919969) )
+ ( 98661, std::make_pair(uint256("0x48328dfc0eaffc659723739c6202854d1624449340193bdea3e71ece4ccdd43f"), 1401469019) )
;
// TestNet has no checkpoints
static MapCheckpoints mapCheckpointsTestnet =
boost::assign::map_list_of
- ( 0, initCheckpoint(hashGenesisBlockTestNet, 1360105017) )
+ ( 0, std::make_pair(hashGenesisBlockTestNet, 1360105017) )
;
bool CheckHardened(int nHeight, const uint256& hash)
MapCheckpoints::const_iterator i = checkpoints.find(nHeight);
if (i == checkpoints.end()) return true;
- return hash == i->second.hashCheckPoint;
+ return hash == i->second.first;
}
int GetTotalBlocksEstimate()
{
MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);
- return checkpoints.rbegin()->second.nTime;
+ return checkpoints.rbegin()->second.second;
}
CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex)
BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, checkpoints)
{
- const uint256& hash = i.second.hashCheckPoint;
+ const uint256& hash = i.second.first;
std::map<uint256, CBlockIndex*>::const_iterator t = mapBlockIndex.find(hash);
if (t != mapBlockIndex.end())
return t->second;
CBlockIndex* pindex = pindexSyncCheckpoint;
while (pindex->nHeight > pindexCheckpointRecv->nHeight)
if (!(pindex = pindex->pprev))
- return error("ValidateSyncCheckpoint: pprev1 null - block index structure failure");
+ return error("ValidateSyncCheckpoint: pprev null - block index structure failure");
if (pindex->GetBlockHash() != hashCheckpoint)
{
hashInvalidCheckpoint = hashCheckpoint;
if (!txdb.TxnCommit())
return error("WriteSyncCheckpoint(): failed to commit to db sync checkpoint %s", hashCheckpoint.ToString().c_str());
-#ifndef USE_LEVELDB
- txdb.Close();
-#endif
-
Checkpoints::hashSyncCheckpoint = hashCheckpoint;
return true;
}
}
}
-#ifndef USE_LEVELDB
- txdb.Close();
-#endif
if (!WriteSyncCheckpoint(hashPendingCheckpoint))
return error("AcceptPendingSyncCheckpoint(): failed to write sync checkpoint %s", hashPendingCheckpoint.ToString().c_str());
hashPendingCheckpoint = 0;
// Automatically select a suitable sync-checkpoint
uint256 AutoSelectSyncCheckpoint()
{
- // Proof-of-work blocks are immediately checkpointed
- // to defend against 51% attack which rejects other miners block
-
- // Select the last proof-of-work block
- const CBlockIndex *pindex = GetLastBlockIndex(pindexBest, false);
- // Search forward for a block within max span and maturity window
- while (pindex->pnext && (pindex->GetBlockTime() + CHECKPOINT_MAX_SPAN <= pindexBest->GetBlockTime() || pindex->nHeight + std::min(6, nCoinbaseMaturity - 20) <= pindexBest->nHeight))
- pindex = pindex->pnext;
+ const CBlockIndex *pindex = pindexBest;
+ // Search backward for a block within max span and maturity window
+ while (pindex->pprev && (pindex->GetBlockTime() + CHECKPOINT_MAX_SPAN > pindexBest->GetBlockTime() || pindex->nHeight + 8 > pindexBest->nHeight))
+ pindex = pindex->pprev;
return pindex->GetBlockHash();
}
bool ResetSyncCheckpoint()
{
LOCK(cs_hashSyncCheckpoint);
- const uint256& hash = mapCheckpoints.rbegin()->second.hashCheckPoint;
+ const uint256& hash = mapCheckpoints.rbegin()->second.first;
if (mapBlockIndex.count(hash) && !mapBlockIndex[hash]->IsInMainChain())
{
// checkpoint block accepted but not yet in main chain
{
return error("ResetSyncCheckpoint: SetBestChain failed for hardened checkpoint %s", hash.ToString().c_str());
}
-
-#ifndef USE_LEVELDB
- txdb.Close();
-#endif
-
}
else if(!mapBlockIndex.count(hash))
{
BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, mapCheckpoints)
{
- const uint256& hash = i.second.hashCheckPoint;
+ const uint256& hash = i.second.first;
if (mapBlockIndex.count(hash) && mapBlockIndex[hash]->IsInMainChain())
{
if (!WriteSyncCheckpoint(hash))
return (nBestHeight >= pindexSync->nHeight + nCoinbaseMaturity ||
pindexSync->GetBlockTime() + nStakeMinAge < GetAdjustedTime());
}
-
- // Is the sync-checkpoint too old?
- bool IsSyncCheckpointTooOld(unsigned int nSeconds)
- {
- LOCK(cs_hashSyncCheckpoint);
- // sync-checkpoint should always be accepted block
- assert(mapBlockIndex.count(hashSyncCheckpoint));
- const CBlockIndex* pindexSync = mapBlockIndex[hashSyncCheckpoint];
- return (pindexSync->GetBlockTime() + nSeconds < GetAdjustedTime());
- }
}
// ppcoin: sync-checkpoint master key
}
}
-#ifndef USE_LEVELDB
- txdb.Close();
-#endif
-
if (!Checkpoints::WriteSyncCheckpoint(hashCheckpoint))
return error("ProcessSyncCheckpoint(): failed to write sync checkpoint %s", hashCheckpoint.ToString().c_str());
Checkpoints::checkpointMessage = *this;