X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=src%2Fcheckpoints.cpp;h=65451d19f0a987a0b19d8dda8173168c6a0c7842;hb=bafc8da08d2a0ece54ac443aa4569974b319cccb;hp=7de5883edda573cc173484379d3cee648a296351;hpb=bf2ce95cb5b1da5d894e5302a7c4de0894c1cce2;p=novacoin.git diff --git a/src/checkpoints.cpp b/src/checkpoints.cpp index 7de5883..65451d1 100644 --- a/src/checkpoints.cpp +++ b/src/checkpoints.cpp @@ -1,5 +1,4 @@ // Copyright (c) 2009-2012 The Bitcoin developers -// Copyright (c) 2011-2012 The PPCoin developers // Distributed under the MIT/X11 software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -8,13 +7,13 @@ #include "checkpoints.h" -#include "db.h" +#include "txdb.h" #include "main.h" #include "uint256.h" namespace Checkpoints { - typedef std::map MapCheckpoints; // hardened checkpoints + typedef std::map > MapCheckpoints; // // What makes a good checkpoint block? @@ -25,37 +24,50 @@ namespace Checkpoints // static MapCheckpoints mapCheckpoints = boost::assign::map_list_of - ( 0, hashGenesisBlockOfficial ) - ; // ppcoin: no checkpoint yet; to be created in future releases + ( 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) ) + ; + + // TestNet has no checkpoints + static MapCheckpoints mapCheckpointsTestnet = + boost::assign::map_list_of + ( 0, std::make_pair(hashGenesisBlockTestNet, 1360105017) ) + ; bool CheckHardened(int nHeight, const uint256& hash) { - if (fTestNet) return true; // Testnet has no checkpoints + MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints); - MapCheckpoints::const_iterator i = mapCheckpoints.find(nHeight); - if (i == mapCheckpoints.end()) return true; - return hash == i->second; + MapCheckpoints::const_iterator i = checkpoints.find(nHeight); + if (i == checkpoints.end()) return true; + return hash == i->second.first; } int GetTotalBlocksEstimate() { - if (fTestNet) return 0; + MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints); + + return checkpoints.rbegin()->first; + } + + int GetLastCheckpointTime() + { + MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints); - return mapCheckpoints.rbegin()->first; + return checkpoints.rbegin()->second.second; } CBlockIndex* GetLastCheckpoint(const std::map& mapBlockIndex) { - if (fTestNet) { - std::map::const_iterator t = mapBlockIndex.find(hashGenesisBlock); - if (t != mapBlockIndex.end()) - return t->second; - return NULL; - } + MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints); - BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, mapCheckpoints) + BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, checkpoints) { - const uint256& hash = i.second; + const uint256& hash = i.second.first; std::map::const_iterator t = mapBlockIndex.find(hash); if (t != mapBlockIndex.end()) return t->second; @@ -101,7 +113,7 @@ namespace Checkpoints 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; @@ -136,7 +148,6 @@ namespace Checkpoints } if (!txdb.TxnCommit()) return error("WriteSyncCheckpoint(): failed to commit to db sync checkpoint %s", hashCheckpoint.ToString().c_str()); - txdb.Close(); Checkpoints::hashSyncCheckpoint = hashCheckpoint; return true; @@ -158,15 +169,15 @@ namespace Checkpoints CBlockIndex* pindexCheckpoint = mapBlockIndex[hashPendingCheckpoint]; if (!pindexCheckpoint->IsInMainChain()) { - txdb.TxnBegin(); - if (!Reorganize(txdb, pindexCheckpoint)) + CBlock block; + if (!block.ReadFromDisk(pindexCheckpoint)) + return error("AcceptPendingSyncCheckpoint: ReadFromDisk failed for sync checkpoint %s", hashPendingCheckpoint.ToString().c_str()); + if (!block.SetBestChain(txdb, pindexCheckpoint)) { - txdb.TxnAbort(); hashInvalidCheckpoint = hashPendingCheckpoint; - return error("AcceptPendingSyncCheckpoint: Reorganize failed for sync checkpoint %s", hashPendingCheckpoint.ToString().c_str()); + return error("AcceptPendingSyncCheckpoint: SetBestChain failed for sync checkpoint %s", hashPendingCheckpoint.ToString().c_str()); } } - txdb.Close(); if (!WriteSyncCheckpoint(hashPendingCheckpoint)) return error("AcceptPendingSyncCheckpoint(): failed to write sync checkpoint %s", hashPendingCheckpoint.ToString().c_str()); @@ -188,14 +199,10 @@ namespace Checkpoints // 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 + COINBASE_MATURITY <= 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(); } @@ -244,19 +251,19 @@ namespace Checkpoints bool ResetSyncCheckpoint() { LOCK(cs_hashSyncCheckpoint); - const uint256& hash = mapCheckpoints.rbegin()->second; + const uint256& hash = mapCheckpoints.rbegin()->second.first; if (mapBlockIndex.count(hash) && !mapBlockIndex[hash]->IsInMainChain()) { // checkpoint block accepted but not yet in main chain - printf("ResetSyncCheckpoint: Reorganize to hardened checkpoint %s\n", hash.ToString().c_str()); + printf("ResetSyncCheckpoint: SetBestChain to hardened checkpoint %s\n", hash.ToString().c_str()); CTxDB txdb; - txdb.TxnBegin(); - if (!Reorganize(txdb, mapBlockIndex[hash])) + CBlock block; + if (!block.ReadFromDisk(mapBlockIndex[hash])) + return error("ResetSyncCheckpoint: ReadFromDisk failed for hardened checkpoint %s", hash.ToString().c_str()); + if (!block.SetBestChain(txdb, mapBlockIndex[hash])) { - txdb.TxnAbort(); - return error("ResetSyncCheckpoint: Reorganize failed for hardened checkpoint %s", hash.ToString().c_str()); + return error("ResetSyncCheckpoint: SetBestChain failed for hardened checkpoint %s", hash.ToString().c_str()); } - txdb.Close(); } else if(!mapBlockIndex.count(hash)) { @@ -268,7 +275,7 @@ namespace Checkpoints BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, mapCheckpoints) { - const uint256& hash = i.second; + const uint256& hash = i.second.first; if (mapBlockIndex.count(hash) && mapBlockIndex[hash]->IsInMainChain()) { if (!WriteSyncCheckpoint(hash)) @@ -292,7 +299,7 @@ namespace Checkpoints { // Test signing a sync-checkpoint with genesis block CSyncCheckpoint checkpoint; - checkpoint.hashCheckpoint = hashGenesisBlock; + checkpoint.hashCheckpoint = !fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet; CDataStream sMsg(SER_NETWORK, PROTOCOL_VERSION); sMsg << (CUnsignedSyncCheckpoint)checkpoint; checkpoint.vchMsg = std::vector(sMsg.begin(), sMsg.end()); @@ -325,7 +332,11 @@ namespace Checkpoints return error("SendSyncCheckpoint: Unable to sign checkpoint, check private key?"); if(!checkpoint.ProcessSyncCheckpoint(NULL)) - return error("SendSyncCheckpoint: Failed to process checkpoint."); + { + printf("WARNING: SendSyncCheckpoint: Failed to process checkpoint.\n"); + return false; + } + // Relay checkpoint { LOCK(cs_vNodes); @@ -334,10 +345,31 @@ namespace Checkpoints } return true; } + + // Is the sync-checkpoint outside maturity window? + bool IsMatureSyncCheckpoint() + { + LOCK(cs_hashSyncCheckpoint); + // sync-checkpoint should always be accepted block + assert(mapBlockIndex.count(hashSyncCheckpoint)); + const CBlockIndex* pindexSync = mapBlockIndex[hashSyncCheckpoint]; + 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 -const std::string CSyncCheckpoint::strMasterPubKey = "0424f20205e5da98ba632bbd278a11a6499585f62bfb2c782377ef59f0251daab8085fc31471bcb8180bc75ed0fa41bb50c7c084511d54015a3a5241d645c7268a"; +const std::string CSyncCheckpoint::strMasterPubKey = "04a51b735f816de4ec3f891d5b38bbc91e1f7245c7c08d17990760b86b4d8fc3910a850ffecf73bfa8886f01739a0c4c4322201282d07b6e48ce931cc92af94850"; std::string CSyncCheckpoint::strMasterPrivKey = ""; @@ -388,15 +420,15 @@ bool CSyncCheckpoint::ProcessSyncCheckpoint(CNode* pfrom) if (!pindexCheckpoint->IsInMainChain()) { // checkpoint chain received but not yet main chain - txdb.TxnBegin(); - if (!Reorganize(txdb, pindexCheckpoint)) + CBlock block; + if (!block.ReadFromDisk(pindexCheckpoint)) + return error("ProcessSyncCheckpoint: ReadFromDisk failed for sync checkpoint %s", hashCheckpoint.ToString().c_str()); + if (!block.SetBestChain(txdb, pindexCheckpoint)) { - txdb.TxnAbort(); Checkpoints::hashInvalidCheckpoint = hashCheckpoint; - return error("ProcessSyncCheckpoint: Reorganize failed for sync checkpoint %s", hashCheckpoint.ToString().c_str()); + return error("ProcessSyncCheckpoint: SetBestChain failed for sync checkpoint %s", hashCheckpoint.ToString().c_str()); } } - txdb.Close(); if (!Checkpoints::WriteSyncCheckpoint(hashCheckpoint)) return error("ProcessSyncCheckpoint(): failed to write sync checkpoint %s", hashCheckpoint.ToString().c_str());