-// Copyright (c) 2011 The Bitcoin developers
+// 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 license.txt or http://www.opensource.org/licenses/mit-license.php.
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <boost/assign/list_of.hpp> // for 'map_list_of()'
#include <boost/foreach.hpp>
-#include "headers.h"
#include "checkpoints.h"
+#include "db.h"
+#include "main.h"
+#include "uint256.h"
+
namespace Checkpoints
{
typedef std::map<int, uint256> MapCheckpoints; // hardened checkpoints
//
static MapCheckpoints mapCheckpoints =
boost::assign::map_list_of
- ( 0, hashGenesisBlock )
+ ( 0, hashGenesisBlockOfficial )
; // ppcoin: no checkpoint yet; to be created in future releases
bool CheckHardened(int nHeight, const uint256& hash)
CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex)
{
- if (fTestNet) return NULL;
+ if (fTestNet) {
+ std::map<uint256, CBlockIndex*>::const_iterator t = mapBlockIndex.find(hashGenesisBlock);
+ if (t != mapBlockIndex.end())
+ return t->second;
+ return NULL;
+ }
- int64 nResult;
BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, mapCheckpoints)
{
const uint256& hash = i.second;
}
// ppcoin: synchronized checkpoint (centrally broadcasted)
- uint256 hashSyncCheckpoint;
+ uint256 hashSyncCheckpoint = 0;
+ uint256 hashPendingCheckpoint = 0;
CSyncCheckpoint checkpointMessage;
CSyncCheckpoint checkpointMessagePending;
uint256 hashInvalidCheckpoint = 0;
// ppcoin: get last synchronized checkpoint
CBlockIndex* GetLastSyncCheckpoint()
{
- CRITICAL_BLOCK(cs_hashSyncCheckpoint)
- {
- if (!mapBlockIndex.count(hashSyncCheckpoint))
- error("GetSyncCheckpoint: block index missing for current sync-checkpoint %s", hashSyncCheckpoint.ToString().c_str());
- else
- return mapBlockIndex[hashSyncCheckpoint];
- }
+ LOCK(cs_hashSyncCheckpoint);
+ if (!mapBlockIndex.count(hashSyncCheckpoint))
+ error("GetSyncCheckpoint: block index missing for current sync-checkpoint %s", hashSyncCheckpoint.ToString().c_str());
+ else
+ return mapBlockIndex[hashSyncCheckpoint];
return NULL;
}
return true;
}
+ bool WriteSyncCheckpoint(const uint256& hashCheckpoint)
+ {
+ CTxDB txdb;
+ txdb.TxnBegin();
+ if (!txdb.WriteSyncCheckpoint(hashCheckpoint))
+ {
+ txdb.TxnAbort();
+ return error("WriteSyncCheckpoint(): failed to write to db sync checkpoint %s", hashCheckpoint.ToString().c_str());
+ }
+ if (!txdb.TxnCommit())
+ return error("WriteSyncCheckpoint(): failed to commit to db sync checkpoint %s", hashCheckpoint.ToString().c_str());
+ txdb.Close();
+
+ Checkpoints::hashSyncCheckpoint = hashCheckpoint;
+ return true;
+ }
+
bool AcceptPendingSyncCheckpoint()
{
- CRITICAL_BLOCK(cs_hashSyncCheckpoint)
+ LOCK(cs_hashSyncCheckpoint);
+ if (hashPendingCheckpoint != 0 && mapBlockIndex.count(hashPendingCheckpoint))
{
- if ((!checkpointMessagePending.IsNull()) && mapBlockIndex.count(checkpointMessagePending.hashCheckpoint))
+ if (!ValidateSyncCheckpoint(hashPendingCheckpoint))
{
- if (!ValidateSyncCheckpoint(checkpointMessagePending.hashCheckpoint))
- {
- checkpointMessagePending.SetNull();
- return false;
- }
-
- CTxDB txdb;
- CBlockIndex* pindexCheckpoint = mapBlockIndex[checkpointMessagePending.hashCheckpoint];
- if (!pindexCheckpoint->IsInMainChain())
- {
- txdb.TxnBegin();
- if (!Reorganize(txdb, pindexCheckpoint))
- {
- txdb.TxnAbort();
- hashInvalidCheckpoint = checkpointMessagePending.hashCheckpoint;
- return error("ProcessSyncCheckpoint: Reorganize failed for sync checkpoint %s", checkpointMessagePending.hashCheckpoint.ToString().c_str());
- }
- }
+ hashPendingCheckpoint = 0;
+ checkpointMessagePending.SetNull();
+ return false;
+ }
+ CTxDB txdb;
+ CBlockIndex* pindexCheckpoint = mapBlockIndex[hashPendingCheckpoint];
+ if (!pindexCheckpoint->IsInMainChain())
+ {
txdb.TxnBegin();
- if (!txdb.WriteSyncCheckpoint(checkpointMessagePending.hashCheckpoint))
+ if (!Reorganize(txdb, pindexCheckpoint))
{
txdb.TxnAbort();
- return error("AcceptPendingSyncCheckpoint() : failed to write to db sync checkpoint %s\n", checkpointMessagePending.hashCheckpoint.ToString().c_str());
+ hashInvalidCheckpoint = hashPendingCheckpoint;
+ return error("ProcessSyncCheckpoint: Reorganize failed for sync checkpoint %s", hashPendingCheckpoint.ToString().c_str());
}
- if (!txdb.TxnCommit())
- return error("AcceptPendingSyncCheckpoint() : failed to commit to db sync checkpoint %s\n", checkpointMessagePending.hashCheckpoint.ToString().c_str());
- txdb.Close();
-
- hashSyncCheckpoint = checkpointMessagePending.hashCheckpoint;
- checkpointMessage = checkpointMessagePending;
- checkpointMessagePending.SetNull();
- printf("AcceptPendingSyncCheckpoint : sync-checkpoint at %s\n", hashSyncCheckpoint.ToString().c_str());
- // relay the checkpoint
- CRITICAL_BLOCK(cs_hashSyncCheckpoint)
- BOOST_FOREACH(CNode* pnode, vNodes)
- checkpointMessage.RelayTo(pnode);
- return true;
}
+ txdb.Close();
+
+ if (!WriteSyncCheckpoint(hashPendingCheckpoint))
+ return error("AcceptPendingSyncCheckpoint(): failed to write sync checkpoint %s", hashPendingCheckpoint.ToString().c_str());
+ hashPendingCheckpoint = 0;
+ checkpointMessage = checkpointMessagePending;
+ checkpointMessagePending.SetNull();
+ printf("AcceptPendingSyncCheckpoint : sync-checkpoint at %s\n", hashSyncCheckpoint.ToString().c_str());
+ // relay the checkpoint
+ if (!checkpointMessage.IsNull())
+ {
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ checkpointMessage.RelayTo(pnode);
+ }
+ return true;
}
-
return false;
}
uint256 AutoSelectSyncCheckpoint()
{
- // select block roughly 8 hours ago
+ // select a block some time ago
CBlockIndex *pindex = mapBlockIndex[hashSyncCheckpoint];
- while (pindex->pnext && pindex->pnext->GetBlockTime() + AUTO_CHECKPOINT_MIN_SPAN <= GetAdjustedTime())
+ while (pindex->pnext && pindex->pnext->GetBlockTime() + CHECKPOINT_MIN_SPAN <= GetAdjustedTime())
pindex = pindex->pnext;
return pindex->GetBlockHash();
}
if (fTestNet) return true; // Testnet has no checkpoints
int nHeight = pindexPrev->nHeight + 1;
- CRITICAL_BLOCK(cs_hashSyncCheckpoint)
- {
- // sync-checkpoint should always be accepted block
- assert(mapBlockIndex.count(hashSyncCheckpoint));
- const CBlockIndex* pindexSync = mapBlockIndex[hashSyncCheckpoint];
+ LOCK(cs_hashSyncCheckpoint);
+ // sync-checkpoint should always be accepted block
+ assert(mapBlockIndex.count(hashSyncCheckpoint));
+ const CBlockIndex* pindexSync = mapBlockIndex[hashSyncCheckpoint];
- if (nHeight > pindexSync->nHeight)
- {
- // trace back to same height as sync-checkpoint
- const CBlockIndex* pindex = pindexPrev;
- while (pindex->nHeight > pindexSync->nHeight)
- if (!(pindex = pindex->pprev))
- return error("CheckSync: pprev null - block index structure failure");
- if (pindex->nHeight < pindexSync->nHeight || pindex->GetBlockHash() != hashSyncCheckpoint)
- return false; // only descendant of sync-checkpoint can pass check
- }
- if (nHeight == pindexSync->nHeight && hashBlock != hashSyncCheckpoint)
- return false; // same height with sync-checkpoint
- if (nHeight < pindexSync->nHeight && !mapBlockIndex.count(hashBlock))
- return false; // lower height than sync-checkpoint
+ if (nHeight > pindexSync->nHeight)
+ {
+ // trace back to same height as sync-checkpoint
+ const CBlockIndex* pindex = pindexPrev;
+ while (pindex->nHeight > pindexSync->nHeight)
+ if (!(pindex = pindex->pprev))
+ return error("CheckSync: pprev null - block index structure failure");
+ if (pindex->nHeight < pindexSync->nHeight || pindex->GetBlockHash() != hashSyncCheckpoint)
+ return false; // only descendant of sync-checkpoint can pass check
}
+ if (nHeight == pindexSync->nHeight && hashBlock != hashSyncCheckpoint)
+ return false; // same height with sync-checkpoint
+ if (nHeight < pindexSync->nHeight && !mapBlockIndex.count(hashBlock))
+ return false; // lower height than sync-checkpoint
return true;
}
bool WantedByPendingSyncCheckpoint(uint256 hashBlock)
{
- CRITICAL_BLOCK(cs_hashSyncCheckpoint)
+ LOCK(cs_hashSyncCheckpoint);
+ if (hashPendingCheckpoint == 0)
+ return false;
+ if (hashBlock == hashPendingCheckpoint)
+ return true;
+ if (mapOrphanBlocks.count(hashPendingCheckpoint)
+ && hashBlock == WantedByOrphan(mapOrphanBlocks[hashPendingCheckpoint]))
+ return true;
+ return false;
+ }
+
+ // ppcoin: reset synchronized checkpoint to last hardened checkpoint
+ bool ResetSyncCheckpoint()
+ {
+ LOCK(cs_hashSyncCheckpoint);
+ const uint256& hash = mapCheckpoints.rbegin()->second;
+ if (mapBlockIndex.count(hash) && !mapBlockIndex[hash]->IsInMainChain())
{
- if (checkpointMessagePending.IsNull())
- return false;
- if (hashBlock == checkpointMessagePending.hashCheckpoint)
- return true;
- if (mapOrphanBlocks.count(checkpointMessagePending.hashCheckpoint)
- && hashBlock == WantedByOrphan(mapOrphanBlocks[checkpointMessagePending.hashCheckpoint]))
+ // checkpoint block accepted but not yet in main chain
+ printf("ResetSyncCheckpoint: Reorganize to hardened checkpoint %s\n", hash.ToString().c_str());
+ CTxDB txdb;
+ txdb.TxnBegin();
+ if (!Reorganize(txdb, mapBlockIndex[hash]))
+ {
+ txdb.TxnAbort();
+ return error("ResetSyncCheckpoint: Reorganize failed for hardened checkpoint %s", hash.ToString().c_str());
+ }
+ txdb.Close();
+ }
+ else if(!mapBlockIndex.count(hash))
+ {
+ // checkpoint block not yet accepted
+ hashPendingCheckpoint = hash;
+ checkpointMessagePending.SetNull();
+ printf("ResetSyncCheckpoint: pending for sync-checkpoint %s\n", hashPendingCheckpoint.ToString().c_str());
+ }
+
+ BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, mapCheckpoints)
+ {
+ const uint256& hash = i.second;
+ if (mapBlockIndex.count(hash) && mapBlockIndex[hash]->IsInMainChain())
+ {
+ if (!WriteSyncCheckpoint(hash))
+ return error("ResetSyncCheckpoint: failed to write sync checkpoint %s", hash.ToString().c_str());
+ printf("ResetSyncCheckpoint: sync-checkpoint reset to %s\n", hashSyncCheckpoint.ToString().c_str());
return true;
+ }
}
+
return false;
}
+
+ void AskForPendingSyncCheckpoint(CNode* pfrom)
+ {
+ LOCK(cs_hashSyncCheckpoint);
+ if (pfrom && hashPendingCheckpoint != 0 && (!mapBlockIndex.count(hashPendingCheckpoint)) && (!mapOrphanBlocks.count(hashPendingCheckpoint)))
+ pfrom->AskFor(CInv(MSG_BLOCK, hashPendingCheckpoint));
+ }
}
// ppcoin: sync-checkpoint master key
return error("CSyncCheckpoint::CheckSignature() : verify signature failed");
// Now unserialize the data
- CDataStream sMsg(vchMsg);
+ CDataStream sMsg(vchMsg, SER_NETWORK, PROTOCOL_VERSION);
sMsg >> *(CUnsignedSyncCheckpoint*)this;
return true;
}
if (!CheckSignature())
return false;
- CRITICAL_BLOCK(Checkpoints::cs_hashSyncCheckpoint)
+ LOCK(Checkpoints::cs_hashSyncCheckpoint);
+ if (!mapBlockIndex.count(hashCheckpoint))
{
- if (!mapBlockIndex.count(hashCheckpoint))
+ // We haven't received the checkpoint chain, keep the checkpoint as pending
+ Checkpoints::hashPendingCheckpoint = hashCheckpoint;
+ Checkpoints::checkpointMessagePending = *this;
+ printf("ProcessSyncCheckpoint: pending for sync-checkpoint %s\n", hashCheckpoint.ToString().c_str());
+ // Ask this guy to fill in what we're missing
+ if (pfrom)
{
- // We haven't received the checkpoint chain, keep the checkpoint as pending
- Checkpoints::checkpointMessagePending = *this;
- printf("ProcessSyncCheckpoint: pending for sync-checkpoint %s\n", hashCheckpoint.ToString().c_str());
- // Ask this guy to fill in what we're missing
- if (pfrom)
- {
- pfrom->PushGetBlocks(pindexBest, hashCheckpoint);
- // ask directly as well in case rejected earlier by duplicate
- // proof-of-stake because getblocks may not get it this time
- pfrom->AskFor(CInv(MSG_BLOCK, mapOrphanBlocks.count(hashCheckpoint)? WantedByOrphan(mapOrphanBlocks[hashCheckpoint]) : hashCheckpoint));
- }
- return false;
+ pfrom->PushGetBlocks(pindexBest, hashCheckpoint);
+ // ask directly as well in case rejected earlier by duplicate
+ // proof-of-stake because getblocks may not get it this time
+ pfrom->AskFor(CInv(MSG_BLOCK, mapOrphanBlocks.count(hashCheckpoint)? WantedByOrphan(mapOrphanBlocks[hashCheckpoint]) : hashCheckpoint));
}
+ return false;
+ }
- if (!Checkpoints::ValidateSyncCheckpoint(hashCheckpoint))
- return false;
-
- CTxDB txdb;
- CBlockIndex* pindexCheckpoint = mapBlockIndex[hashCheckpoint];
- if (!pindexCheckpoint->IsInMainChain())
- {
- // checkpoint chain received but not yet main chain
- txdb.TxnBegin();
- if (!Reorganize(txdb, pindexCheckpoint))
- {
- txdb.TxnAbort();
- Checkpoints::hashInvalidCheckpoint = hashCheckpoint;
- return error("ProcessSyncCheckpoint: Reorganize failed for sync checkpoint %s", hashCheckpoint.ToString().c_str());
- }
- }
+ if (!Checkpoints::ValidateSyncCheckpoint(hashCheckpoint))
+ return false;
+ CTxDB txdb;
+ CBlockIndex* pindexCheckpoint = mapBlockIndex[hashCheckpoint];
+ if (!pindexCheckpoint->IsInMainChain())
+ {
+ // checkpoint chain received but not yet main chain
txdb.TxnBegin();
- if (!txdb.WriteSyncCheckpoint(hashCheckpoint))
+ if (!Reorganize(txdb, pindexCheckpoint))
{
txdb.TxnAbort();
- return error("ProcessSyncCheckpoint(): failed to write to db sync checkpoint %s", hashCheckpoint.ToString().c_str());
+ Checkpoints::hashInvalidCheckpoint = hashCheckpoint;
+ return error("ProcessSyncCheckpoint: Reorganize failed for sync checkpoint %s", hashCheckpoint.ToString().c_str());
}
- if (!txdb.TxnCommit())
- return error("ProcessSyncCheckpoint(): failed to commit to db sync checkpoint %s", hashCheckpoint.ToString().c_str());
- txdb.Close();
-
- Checkpoints::hashSyncCheckpoint = hashCheckpoint;
- Checkpoints::checkpointMessage = *this;
- Checkpoints::checkpointMessagePending.SetNull();
- printf("ProcessSyncCheckpoint: sync-checkpoint at %s\n", hashCheckpoint.ToString().c_str());
}
+ txdb.Close();
+
+ if (!Checkpoints::WriteSyncCheckpoint(hashCheckpoint))
+ return error("ProcessSyncCheckpoint(): failed to write sync checkpoint %s", hashCheckpoint.ToString().c_str());
+ Checkpoints::checkpointMessage = *this;
+ Checkpoints::hashPendingCheckpoint = 0;
+ Checkpoints::checkpointMessagePending.SetNull();
+ printf("ProcessSyncCheckpoint: sync-checkpoint at %s\n", hashCheckpoint.ToString().c_str());
return true;
}
git://git.novaco.in / novacoin.git / blobdiff