Merge with Bitcoin v0.6.3

[novacoin.git] / src / checkpoints.h

diff --git a/src/checkpoints.h b/src/checkpoints.h
index 70e9365..ff815c8 100644 (file)
--- a/src/checkpoints.h
+++ b/src/checkpoints.h
@@ -1,13 +1,20 @@
 // Copyright (c) 2009-2012 The Bitcoin developers
+// Copyright (c) 2011-2012 The PPCoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 #ifndef BITCOIN_CHECKPOINT_H
 #define  BITCOIN_CHECKPOINT_H
 
 #include <map>
+#include "net.h"
+#include "util.h"
+
+#define STAKE_MIN_AGE (60 * 60 * 24)      // minimum age for coin age
+#define CHECKPOINT_MIN_SPAN (60 * 60 * 4) // 4 hours checkpoint
 
 class uint256;
 class CBlockIndex;
+class CSyncCheckpoint;
 
 /** Block-chain checkpoints are compiled-in sanity checks.
  * They are updated every release or three.
@@ -15,13 +22,116 @@ class CBlockIndex;
 namespace Checkpoints
 {
     // Returns true if block passes checkpoint checks
-    bool CheckBlock(int nHeight, const uint256& hash);
+    bool CheckHardened(int nHeight, const uint256& hash);
 
     // 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);
+
+    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(uint256 hashBlock);
+    bool ResetSyncCheckpoint();
+    void AskForPendingSyncCheckpoint(CNode* pfrom);
 }
 
+// ppcoin: synchronized checkpoint
+class CUnsignedSyncCheckpoint
+{
+public:
+    int nVersion;
+    uint256 hashCheckpoint;      // checkpoint block
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(this->nVersion);
+        nVersion = this->nVersion;
+        READWRITE(hashCheckpoint);
+    )
+
+    void SetNull()
+    {
+        nVersion = 1;
+        hashCheckpoint = 0;
+    }
+
+    std::string ToString() const
+    {
+        return strprintf(
+                "CSyncCheckpoint(\n"
+                "    nVersion       = %d\n"
+                "    hashCheckpoint = %s\n"
+                ")\n",
+            nVersion,
+            hashCheckpoint.ToString().c_str());
+    }
+
+    void print() const
+    {
+        printf("%s", ToString().c_str());
+    }
+};
+
+class CSyncCheckpoint : public CUnsignedSyncCheckpoint
+{
+public:
+    static const std::string strMasterPubKey;
+
+    std::vector<unsigned char> vchMsg;
+    std::vector<unsigned char> vchSig;
+
+    CSyncCheckpoint()
+    {
+        SetNull();
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(vchMsg);
+        READWRITE(vchSig);
+    )
+
+    void SetNull()
+    {
+        CUnsignedSyncCheckpoint::SetNull();
+        vchMsg.clear();
+        vchSig.clear();
+    }
+
+    bool IsNull() const
+    {
+        return (hashCheckpoint == 0);
+    }
+
+    uint256 GetHash() const
+    {
+        return SerializeHash(*this);
+    }
+
+    bool RelayTo(CNode* pnode) const
+    {
+        // returns true if wasn't already sent
+        if (pnode->hashCheckpointKnown != hashCheckpoint)
+        {
+            pnode->hashCheckpointKnown = hashCheckpoint;
+            pnode->PushMessage("checkpoint", *this);
+            return true;
+        }
+        return false;
+    }
+
+    bool CheckSignature();
+    bool ProcessSyncCheckpoint(CNode* pfrom);
+};
+
 #endif