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 unsigned 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();
69 // ppcoin: synchronized checkpoint
70 class CUnsignedSyncCheckpoint
74 uint256 hashCheckpoint; // checkpoint block
78 READWRITE(this->nVersion);
79 nVersion = this->nVersion;
80 READWRITE(hashCheckpoint);
89 std::string ToString() const
94 " hashCheckpoint = %s\n"
97 hashCheckpoint.ToString().c_str());
102 printf("%s", ToString().c_str());
106 class CSyncCheckpoint : public CUnsignedSyncCheckpoint
109 static const std::string strMasterPubKey;
110 static std::string strMasterPrivKey;
112 std::vector<unsigned char> vchMsg;
113 std::vector<unsigned char> vchSig;
128 CUnsignedSyncCheckpoint::SetNull();
135 return (hashCheckpoint == 0);
138 uint256 GetHash() const
140 return SerializeHash(*this);
143 bool RelayTo(CNode* pnode) const
145 // returns true if wasn't already sent
146 if (pnode->hashCheckpointKnown != hashCheckpoint)
148 pnode->hashCheckpointKnown = hashCheckpoint;
149 pnode->PushMessage("checkpoint", *this);
155 bool CheckSignature();
156 bool ProcessSyncCheckpoint(CNode* pfrom);