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 #define CHECKPOINT_MAX_SPAN (60 * 60) // max 1 hour before latest block
21 class CSyncCheckpoint;
23 /** Block-chain checkpoints are compiled-in sanity checks.
24 * They are updated every release or three.
28 /** Checkpointing mode */
31 // Scrict checkpoints policy, perform conflicts verification and resolve conflicts
33 // Advisory checkpoints policy, perform conflicts verification but don't try to resolve them
35 // Permissive checkpoints policy, don't perform any checking
39 // Returns true if block passes checkpoint checks
40 bool CheckHardened(int nHeight, const uint256& hash);
42 // Return conservative estimate of total number of blocks, 0 if unknown
43 int GetTotalBlocksEstimate();
45 // Returns last CBlockIndex* in mapBlockIndex that is a checkpoint
46 CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex);
48 // Returns last checkpoint timestamp
49 int GetLastCheckpointTime();
51 extern uint256 hashSyncCheckpoint;
52 extern CSyncCheckpoint checkpointMessage;
53 extern uint256 hashInvalidCheckpoint;
54 extern CCriticalSection cs_hashSyncCheckpoint;
56 CBlockIndex* GetLastSyncCheckpoint();
57 bool WriteSyncCheckpoint(const uint256& hashCheckpoint);
58 bool AcceptPendingSyncCheckpoint();
59 uint256 AutoSelectSyncCheckpoint();
60 bool CheckSync(const uint256& hashBlock, const CBlockIndex* pindexPrev);
61 bool WantedByPendingSyncCheckpoint(uint256 hashBlock);
62 bool ResetSyncCheckpoint();
63 void AskForPendingSyncCheckpoint(CNode* pfrom);
64 bool SetCheckpointPrivKey(std::string strPrivKey);
65 bool SendSyncCheckpoint(uint256 hashCheckpoint);
66 bool IsMatureSyncCheckpoint();
67 bool IsSyncCheckpointTooOld(unsigned int nSeconds);
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);