// Copyright (c) 2011 The Bitcoin developers
+// Copyright (c) 2011-2012 The PPCoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_CHECKPOINT_H
#include <map>
#include "util.h"
+// ppcoin: auto checkpoint min at 8 hours; max at 16 hours
+#define AUTO_CHECKPOINT_MIN_SPAN (60 * 60 * 8)
+#define AUTO_CHECKPOINT_MAX_SPAN (60 * 60 * 16)
+#define AUTO_CHECKPOINT_TRUST_SPAN (60 * 60 * 24)
+
class uint256;
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);
+
+ // 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:
+ 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()
+ {
+ CKey key;
+ if (!key.SetPubKey(ParseHex("0487ca85b6ae9d311f996c7616d20d0c88a5b4f07d25e78f419019f35cce6522acf978b2d99f0e7a58db1f120439e5c1889266927854aa57c93956c2569188a539")))
+ return error("CSyncCheckpoint::CheckSignature() : SetPubKey failed");
+ if (!key.Verify(Hash(vchMsg.begin(), vchMsg.end()), vchSig))
+ return error("CSyncCheckpoint::CheckSignature() : verify signature failed");
+
+ // Now unserialize the data
+ CDataStream sMsg(vchMsg);
+ sMsg >> *(CUnsignedSyncCheckpoint*)this;
+ return true;
+ }
+
+ bool ProcessSyncCheckpoint();
+ };
+
+ extern uint256 hashSyncCheckpoint;
+ extern CSyncCheckpoint checkpointMessage;
+ extern CCriticalSection cs_hashSyncCheckpoint;
+
+ // ppcoin: automatic checkpoint
+ extern int nAutoCheckpoint;
+ extern int nBranchPoint;
+
+ bool CheckAuto(const CBlockIndex *pindex);
+ int GetNextChainCheckpoint(const CBlockIndex *pindex);
+ int GetNextAutoCheckpoint(int nCheckpoint);
+ void AdvanceAutoCheckpoint(int nCheckpoint);
+ bool ResetAutoCheckpoint(int nCheckpoint);
}
#endif