Merge pull request #339 from svost/patch-1

[novacoin.git] / src / checkpoints.h

diff --git a/src/checkpoints.h b/src/checkpoints.h
index 9d52da4..8f044da 100644 (file)
--- a/src/checkpoints.h
+++ b/src/checkpoints.h
@@ -1,29 +1,109 @@
-// Copyright (c) 2011 The Bitcoin developers
+// Copyright (c) 2009-2012 The Bitcoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
-// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #ifndef BITCOIN_CHECKPOINT_H
 #define  BITCOIN_CHECKPOINT_H
 
 #include <map>
 #include "util.h"
+#include "net.h"
+
+// max 1 hour before latest block
+static const int64_t CHECKPOINT_MAX_SPAN = nOneHour;
 
 class uint256;
 class CBlockIndex;
+class CSyncCheckpoint;
 
-//
 // Block-chain checkpoints are compiled-in sanity checks.
 // They are updated every release or three.
-//
 namespace Checkpoints
 {
+    // Checkpointing mode
+    enum CPMode
+    {
+        // Scrict checkpoints policy, perform conflicts verification and resolve conflicts
+        CP_STRICT = 0,
+        // Advisory checkpoints policy, perform conflicts verification but don't try to resolve them
+        CP_ADVISORY = 1,
+        // Permissive checkpoints policy, don't perform any checking
+        CP_PERMISSIVE = 2
+    };
+
     // Returns true if block passes checkpoint checks
-    bool CheckBlock(int nHeight, const uint256& hash);
+    bool CheckHardened(int nHeight, const uint256& hash);
+
+    // Returns true if block passes banlist checks
+    bool CheckBanned(const uint256 &nHash);
 
     // Return conservative estimate of total number of blocks, 0 if unknown
     int GetTotalBlocksEstimate();
 
     // Returns last CBlockIndex* in mapBlockIndex that is a checkpoint
     CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex);
+
+    // Returns last checkpoint timestamp
+    unsigned int GetLastCheckpointTime();
+
+    extern uint256 hashSyncCheckpoint;
+    extern CSyncCheckpoint checkpointMessage;
+    extern uint256 hashInvalidCheckpoint;
+    extern CCriticalSection cs_hashSyncCheckpoint;
+
+    CBlockIndex* GetLastSyncCheckpoint();
+    bool WriteSyncCheckpoint(const uint256& hashCheckpoint);
+    bool AcceptPendingSyncCheckpoint();
+    uint256 AutoSelectSyncCheckpoint();
+    bool CheckSync(const uint256& hashBlock, const CBlockIndex* pindexPrev);
+    bool WantedByPendingSyncCheckpoint(const uint256 &hashBlock);
+    bool ResetSyncCheckpoint();
+    void AskForPendingSyncCheckpoint(CNode* pfrom);
+    bool SetCheckpointPrivKey(const std::string &strPrivKey);
+    bool SendSyncCheckpoint(const uint256 &hashCheckpoint);
+    bool IsMatureSyncCheckpoint();
 }
 
+// ppcoin: synchronized checkpoint
+class CUnsignedSyncCheckpoint
+{
+public:
+    int32_t nVersion;
+    uint256 hashCheckpoint;      // checkpoint block
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(this->nVersion);
+        nVersion = this->nVersion;
+        READWRITE(hashCheckpoint);
+    )
+
+    void SetNull();
+    std::string ToString() const;
+};
+
+class CSyncCheckpoint : public CUnsignedSyncCheckpoint
+{
+public:
+    static const std::string strMasterPubKey;
+    static std::string strMasterPrivKey;
+
+    std::vector<unsigned char> vchMsg;
+    std::vector<unsigned char> vchSig;
+
+    CSyncCheckpoint();
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(vchMsg);
+        READWRITE(vchSig);
+    )
+
+    void SetNull();
+    bool IsNull() const;
+    uint256 GetHash() const;
+    bool RelayTo(CNode* pnode) const;
+    bool CheckSignature();
+    bool ProcessSyncCheckpoint(CNode* pfrom);
+};
+
 #endif