-// Copyright (c) 2011 The Bitcoin developers
-// Copyright (c) 2011 The PPCoin 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"
-// ppcoin: auto checkpoint min at 1 day; max at 1 week
-#define AUTO_CHECKPOINT_MIN_SPAN (60 * 60 * 24)
-#define AUTO_CHECKPOINT_MAX_SPAN (60 * 60 * 24 * 7)
+// max 1 hour before latest block
+static const int64_t CHECKPOINT_MAX_SPAN = nOneHour;
+
+#ifdef WIN32
+#undef STRICT
+#undef PERMISSIVE
+#undef ADVISORY
+#endif
class uint256;
class CBlockIndex;
+class CSyncCheckpoint;
-//
-// Block-chain checkpoints are compiled-in sanity checks.
-// They are updated every release or three.
-//
+/** Block-chain checkpoints are compiled-in sanity checks.
+ * They are updated every release or three.
+ */
namespace Checkpoints
{
- extern int nAutoCheckpoint;
+ /** Checkpointing mode */
+ enum CPMode
+ {
+ // Scrict checkpoints policy, perform conflicts verification and resolve conflicts
+ STRICT = 0,
+ // Advisory checkpoints policy, perform conflicts verification but don't try to resolve them
+ ADVISORY = 1,
+ // Permissive checkpoints policy, don't perform any checking
+ PERMISSIVE = 2
+ };
// Returns true if block passes checkpoint checks
bool CheckHardened(int nHeight, const uint256& hash);
- bool CheckAuto(const CBlockIndex *pindex);
- int GetNextChainCheckpoint(const CBlockIndex *pindex);
- void AdvanceAutoCheckpoint(int nCheckpoint);
+ // 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(uint256 hashBlock);
+ bool ResetSyncCheckpoint();
+ void AskForPendingSyncCheckpoint(CNode* pfrom);
+ bool SetCheckpointPrivKey(std::string strPrivKey);
+ bool SendSyncCheckpoint(uint256 hashCheckpoint);
+ bool IsMatureSyncCheckpoint();
}
+// 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());
+ }
+};
+
+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()
+ {
+ 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