diff options
Diffstat (limited to 'src/checkpoints.cpp')
-rw-r--r-- | src/checkpoints.cpp | 76 |
1 files changed, 70 insertions, 6 deletions
diff --git a/src/checkpoints.cpp b/src/checkpoints.cpp index e2c420edd7..9e8e0f7024 100644 --- a/src/checkpoints.cpp +++ b/src/checkpoints.cpp @@ -14,13 +14,25 @@ namespace Checkpoints { typedef std::map<int, uint256> MapCheckpoints; - // + // How many times we expect transactions after the last checkpoint to + // be slower. This number is a compromise, as it can't be accurate for + // every system. When reindexing from a fast disk with a slow CPU, it + // can be up to 20, while when downloading from a slow network with a + // fast multicore CPU, it won't be much higher than 1. + static const double fSigcheckVerificationFactor = 5.0; + + struct CCheckpointData { + const MapCheckpoints *mapCheckpoints; + int64 nTimeLastCheckpoint; + int64 nTransactionsLastCheckpoint; + double fTransactionsPerDay; + }; + // What makes a good checkpoint block? // + Is surrounded by blocks with reasonable timestamps // (no blocks before with a timestamp after, none after with // timestamp before) // + Contains no strange transactions - // static MapCheckpoints mapCheckpoints = boost::assign::map_list_of ( 11111, uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d")) @@ -32,31 +44,83 @@ namespace Checkpoints (193000, uint256("0x000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317")) (210000, uint256("0x000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e")) (216116, uint256("0x00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e")) + (225430, uint256("0x00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932")) ; + static const CCheckpointData data = { + &mapCheckpoints, + 1363044259, // * UNIX timestamp of last checkpoint block + 14264869, // * total number of transactions between genesis and last checkpoint + // (the tx=... number in the SetBestChain debug.log lines) + 60000.0 // * estimated number of transactions per day after checkpoint + }; - static MapCheckpoints mapCheckpointsTestnet = + static MapCheckpoints mapCheckpointsTestnet = boost::assign::map_list_of ( 546, uint256("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70")) ; + static const CCheckpointData dataTestnet = { + &mapCheckpointsTestnet, + 1338180505, + 16341, + 300 + }; + + const CCheckpointData &Checkpoints() { + if (fTestNet) + return dataTestnet; + else + return data; + } bool CheckBlock(int nHeight, const uint256& hash) { if (!GetBoolArg("-checkpoints", true)) return true; - MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints); + const MapCheckpoints& checkpoints = *Checkpoints().mapCheckpoints; MapCheckpoints::const_iterator i = checkpoints.find(nHeight); if (i == checkpoints.end()) return true; return hash == i->second; } + // Guess how far we are in the verification process at the given block index + double GuessVerificationProgress(CBlockIndex *pindex) { + if (pindex==NULL) + return 0.0; + + int64 nNow = time(NULL); + + double fWorkBefore = 0.0; // Amount of work done before pindex + double fWorkAfter = 0.0; // Amount of work left after pindex (estimated) + // Work is defined as: 1.0 per transaction before the last checkoint, and + // fSigcheckVerificationFactor per transaction after. + + const CCheckpointData &data = Checkpoints(); + + if (pindex->nChainTx <= data.nTransactionsLastCheckpoint) { + double nCheapBefore = pindex->nChainTx; + double nCheapAfter = data.nTransactionsLastCheckpoint - pindex->nChainTx; + double nExpensiveAfter = (nNow - data.nTimeLastCheckpoint)/86400.0*data.fTransactionsPerDay; + fWorkBefore = nCheapBefore; + fWorkAfter = nCheapAfter + nExpensiveAfter*fSigcheckVerificationFactor; + } else { + double nCheapBefore = data.nTransactionsLastCheckpoint; + double nExpensiveBefore = pindex->nChainTx - data.nTransactionsLastCheckpoint; + double nExpensiveAfter = (nNow - pindex->nTime)/86400.0*data.fTransactionsPerDay; + fWorkBefore = nCheapBefore + nExpensiveBefore*fSigcheckVerificationFactor; + fWorkAfter = nExpensiveAfter*fSigcheckVerificationFactor; + } + + return fWorkBefore / (fWorkBefore + fWorkAfter); + } + int GetTotalBlocksEstimate() { if (!GetBoolArg("-checkpoints", true)) return 0; - MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints); + const MapCheckpoints& checkpoints = *Checkpoints().mapCheckpoints; return checkpoints.rbegin()->first; } @@ -66,7 +130,7 @@ namespace Checkpoints if (!GetBoolArg("-checkpoints", true)) return NULL; - MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints); + const MapCheckpoints& checkpoints = *Checkpoints().mapCheckpoints; BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, checkpoints) { |