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genesis                 1 // Copyright (c) 2009-2012 The Bitcoin developers
genesis                 2 // Distributed under the MIT/X11 software license, see the accompanying
genesis                 3 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
genesis                 4 
genesis                 5 #include <boost/assign/list_of.hpp> // for 'map_list_of()'
genesis                 6 #include <boost/foreach.hpp>
genesis                 7 
genesis                 8 #include "headers.h"
genesis                 9 #include "checkpoints.h"
genesis                10 
genesis                11 namespace Checkpoints
genesis                12 {
genesis                13     typedef std::map<int, uint256> MapCheckpoints;
genesis                14 
genesis                15     //
genesis                16     // What makes a good checkpoint block?
genesis                17     // + Is surrounded by blocks with reasonable timestamps
genesis                18     //   (no blocks before with a timestamp after, none after with
genesis                19     //    timestamp before)
genesis                20     // + Contains no strange transactions
genesis                21     //
genesis                22     static MapCheckpoints mapCheckpoints =
genesis                23         boost::assign::map_list_of
genesis                24         ( 11111, uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d"))
genesis                25         ( 33333, uint256("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6"))
genesis                26         ( 68555, uint256("0x00000000001e1b4903550a0b96e9a9405c8a95f387162e4944e8d9fbe501cd6a"))
genesis                27         ( 70567, uint256("0x00000000006a49b14bcf27462068f1264c961f11fa2e0eddd2be0791e1d4124a"))
genesis                28         ( 74000, uint256("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20"))
genesis                29         (105000, uint256("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97"))
genesis                30         (118000, uint256("0x000000000000774a7f8a7a12dc906ddb9e17e75d684f15e00f8767f9e8f36553"))
genesis                31         (134444, uint256("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe"))
genesis                32         (140700, uint256("0x000000000000033b512028abb90e1626d8b346fd0ed598ac0a3c371138dce2bd"))
genesis                33         (168000, uint256("0x000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763"))
genesis                34         ;
genesis                35 
genesis                36     bool CheckBlock(int nHeight, const uint256& hash)
genesis                37     {
genesis                38         if (fTestNet) return true; // Testnet has no checkpoints
genesis                39 
genesis                40         MapCheckpoints::const_iterator i = mapCheckpoints.find(nHeight);
genesis                41         if (i == mapCheckpoints.end()) return true;
genesis                42         return hash == i->second;
genesis                43     }
genesis                44 
genesis                45     int GetTotalBlocksEstimate()
genesis                46     {
genesis                47         if (fTestNet) return 0;
genesis                48 
genesis                49         return mapCheckpoints.rbegin()->first;
genesis                50     }
genesis                51 
genesis                52     CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex)
genesis                53     {
genesis                54         if (fTestNet) return NULL;
genesis                55 
genesis                56         BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, mapCheckpoints)
genesis                57         {
genesis                58             const uint256& hash = i.second;
genesis                59             std::map<uint256, CBlockIndex*>::const_iterator t = mapBlockIndex.find(hash);
genesis                60             if (t != mapBlockIndex.end())
genesis                61                 return t->second;
genesis                62         }
genesis                63         return NULL;
genesis                64     }
genesis                65 }