1 // Copyright (c) 2009-2012 The Bitcoin developers
2 // Distributed under the MIT/X11 software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 #ifndef BITCOIN_CHECKPOINT_H
5 #define BITCOIN_CHECKPOINT_H
11 // max 1 hour before latest block
12 static const int64_t CHECKPOINT_MAX_SPAN = nOneHour;
22 class CSyncCheckpoint;
24 /** Block-chain checkpoints are compiled-in sanity checks.
25 * They are updated every release or three.
29 /** Checkpointing mode */
32 // Scrict checkpoints policy, perform conflicts verification and resolve conflicts
34 // Advisory checkpoints policy, perform conflicts verification but don't try to resolve them
36 // Permissive checkpoints policy, don't perform any checking
40 // Returns true if block passes checkpoint checks
41 bool CheckHardened(int nHeight, const uint256& hash);
43 // Return conservative estimate of total number of blocks, 0 if unknown
44 int GetTotalBlocksEstimate();
46 // Returns last CBlockIndex* in mapBlockIndex that is a checkpoint
47 CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex);
49 // Returns last checkpoint timestamp
50 unsigned int GetLastCheckpointTime();
52 extern uint256 hashSyncCheckpoint;
53 extern CSyncCheckpoint checkpointMessage;
54 extern uint256 hashInvalidCheckpoint;
55 extern CCriticalSection cs_hashSyncCheckpoint;
57 CBlockIndex* GetLastSyncCheckpoint();
58 bool WriteSyncCheckpoint(const uint256& hashCheckpoint);
59 bool AcceptPendingSyncCheckpoint();
60 uint256 AutoSelectSyncCheckpoint();
61 bool CheckSync(const uint256& hashBlock, const CBlockIndex* pindexPrev);
62 bool WantedByPendingSyncCheckpoint(uint256 hashBlock);
63 bool ResetSyncCheckpoint();
64 void AskForPendingSyncCheckpoint(CNode* pfrom);
65 bool SetCheckpointPrivKey(std::string strPrivKey);
66 bool SendSyncCheckpoint(uint256 hashCheckpoint);
67 bool IsMatureSyncCheckpoint();
70 // ppcoin: synchronized checkpoint
71 class CUnsignedSyncCheckpoint
75 uint256 hashCheckpoint; // checkpoint block
79 READWRITE(this->nVersion);
80 nVersion = this->nVersion;
81 READWRITE(hashCheckpoint);
90 std::string ToString() const
95 " hashCheckpoint = %s\n"
98 hashCheckpoint.ToString().c_str());
103 printf("%s", ToString().c_str());
107 class CSyncCheckpoint : public CUnsignedSyncCheckpoint
110 static const std::string strMasterPubKey;
111 static std::string strMasterPrivKey;
113 std::vector<unsigned char> vchMsg;
114 std::vector<unsigned char> vchSig;
129 CUnsignedSyncCheckpoint::SetNull();
136 return (hashCheckpoint == 0);
139 uint256 GetHash() const
141 return SerializeHash(*this);
144 bool RelayTo(CNode* pnode) const
146 // returns true if wasn't already sent
147 if (pnode->hashCheckpointKnown != hashCheckpoint)
149 pnode->hashCheckpointKnown = hashCheckpoint;
150 pnode->PushMessage("checkpoint", *this);
156 bool CheckSignature();
157 bool ProcessSyncCheckpoint(CNode* pfrom);