-// Copyright (c) 2011 The Bitcoin developers
-// Copyright (c) 2011-2012 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.
#include <boost/assign/list_of.hpp> // for 'map_list_of()'
#include <boost/foreach.hpp>
-#include "headers.h"
#include "checkpoints.h"
+#include "txdb.h"
+#include "main.h"
+#include "uint256.h"
+
namespace Checkpoints
{
- typedef std::map<int, uint256> MapCheckpoints; // hardened checkpoints
+ typedef std::map<int, std::pair<uint256, unsigned int> > MapCheckpoints;
//
// What makes a good checkpoint block?
//
static MapCheckpoints mapCheckpoints =
boost::assign::map_list_of
- ( 0, hashGenesisBlock )
- ; // ppcoin: no checkpoint yet; to be created in future releases
+ ( 0, std::make_pair(hashGenesisBlock, 1360105017) )
+ ( 13560, std::make_pair(uint256("0xa1591a0fcbf11f282d671581edb9f0aadcd06fee69761081e0a3245914c13729"), 1364674052) )
+ ( 143990, std::make_pair(uint256("0x00000000001ff5c3940a9f73ad4a990f64955179bde0f743c76dbf0031429efc"), 1418953493) )
+ ( 149000, std::make_pair(uint256("0x7a24acfcadcf43054e7f7d9f273522c0dfc5791ba4006e0273e7521a8d36c525"), 1420872125) )
+ ;
+
+ // TestNet has no checkpoints
+ static MapCheckpoints mapCheckpointsTestnet =
+ boost::assign::map_list_of
+ ( 0, std::make_pair(hashGenesisBlockTestNet, 1360105017) )
+ ;
bool CheckHardened(int nHeight, const uint256& hash)
{
- if (fTestNet) return true; // Testnet has no checkpoints
+ MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);
- MapCheckpoints::const_iterator i = mapCheckpoints.find(nHeight);
- if (i == mapCheckpoints.end()) return true;
- return hash == i->second;
+ MapCheckpoints::const_iterator i = checkpoints.find(nHeight);
+ if (i == checkpoints.end()) return true;
+ return hash == i->second.first;
}
int GetTotalBlocksEstimate()
{
- if (fTestNet) return 0;
+ MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);
+
+ return checkpoints.rbegin()->first;
+ }
+
+ unsigned int GetLastCheckpointTime()
+ {
+ MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);
- return mapCheckpoints.rbegin()->first;
+ return checkpoints.rbegin()->second.second;
}
CBlockIndex* GetLastCheckpoint(const std::map<uint256, CBlockIndex*>& mapBlockIndex)
{
- if (fTestNet) return NULL;
+ MapCheckpoints& checkpoints = (fTestNet ? mapCheckpointsTestnet : mapCheckpoints);
- int64 nResult;
- BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, mapCheckpoints)
+ BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, checkpoints)
{
- const uint256& hash = i.second;
+ const uint256& hash = i.second.first;
std::map<uint256, CBlockIndex*>::const_iterator t = mapBlockIndex.find(hash);
if (t != mapBlockIndex.end())
return t->second;
}
// ppcoin: synchronized checkpoint (centrally broadcasted)
- uint256 hashSyncCheckpoint;
+ uint256 hashSyncCheckpoint = 0;
+ uint256 hashPendingCheckpoint = 0;
CSyncCheckpoint checkpointMessage;
CSyncCheckpoint checkpointMessagePending;
+ uint256 hashInvalidCheckpoint = 0;
CCriticalSection cs_hashSyncCheckpoint;
+ // ppcoin: get last synchronized checkpoint
+ CBlockIndex* GetLastSyncCheckpoint()
+ {
+ 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;
+ }
+
// ppcoin: only descendant of current sync-checkpoint is allowed
bool ValidateSyncCheckpoint(uint256 hashCheckpoint)
{
CBlockIndex* pindexSyncCheckpoint = mapBlockIndex[hashSyncCheckpoint];
CBlockIndex* pindexCheckpointRecv = mapBlockIndex[hashCheckpoint];
+
if (pindexCheckpointRecv->nHeight <= pindexSyncCheckpoint->nHeight)
- return false; // this is an older checkpoint, ignore
+ {
+ // Received an older checkpoint, trace back from current checkpoint
+ // to the same height of the received checkpoint to verify
+ // that current checkpoint should be a descendant block
+ CBlockIndex* pindex = pindexSyncCheckpoint;
+ while (pindex->nHeight > pindexCheckpointRecv->nHeight)
+ if (!(pindex = pindex->pprev))
+ return error("ValidateSyncCheckpoint: pprev null - block index structure failure");
+ if (pindex->GetBlockHash() != hashCheckpoint)
+ {
+ hashInvalidCheckpoint = hashCheckpoint;
+ return error("ValidateSyncCheckpoint: new sync-checkpoint %s is conflicting with current sync-checkpoint %s", hashCheckpoint.ToString().c_str(), hashSyncCheckpoint.ToString().c_str());
+ }
+ return false; // ignore older checkpoint
+ }
+ // Received checkpoint should be a descendant block of the current
+ // checkpoint. Trace back to the same height of current checkpoint
+ // to verify.
CBlockIndex* pindex = pindexCheckpointRecv;
while (pindex->nHeight > pindexSyncCheckpoint->nHeight)
- pindex = pindex->pprev;
+ if (!(pindex = pindex->pprev))
+ return error("ValidateSyncCheckpoint: pprev2 null - block index structure failure");
if (pindex->GetBlockHash() != hashSyncCheckpoint)
+ {
+ hashInvalidCheckpoint = hashCheckpoint;
return error("ValidateSyncCheckpoint: new sync-checkpoint %s is not a descendant of current sync-checkpoint %s", hashCheckpoint.ToString().c_str(), hashSyncCheckpoint.ToString().c_str());
+ }
return true;
}
- bool AcceptPendingSyncCheckpoint(uint256 hashAcceptedBlock)
+ bool WriteSyncCheckpoint(const uint256& hashCheckpoint)
{
- if (!mapBlockIndex.count(hashAcceptedBlock))
- return false;
+ 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());
+
+#ifndef USE_LEVELDB
+ txdb.Close();
+#endif
+
+ Checkpoints::hashSyncCheckpoint = hashCheckpoint;
+ return true;
+ }
+
+ bool AcceptPendingSyncCheckpoint()
+ {
+ LOCK(cs_hashSyncCheckpoint);
+ if (hashPendingCheckpoint != 0 && mapBlockIndex.count(hashPendingCheckpoint))
+ {
+ if (!ValidateSyncCheckpoint(hashPendingCheckpoint))
+ {
+ hashPendingCheckpoint = 0;
+ checkpointMessagePending.SetNull();
+ return false;
+ }
- CRITICAL_BLOCK(cs_hashSyncCheckpoint)
- if ((!checkpointMessagePending.IsNull()) && checkpointMessagePending.hashCheckpoint == hashAcceptedBlock)
+ CTxDB txdb;
+ CBlockIndex* pindexCheckpoint = mapBlockIndex[hashPendingCheckpoint];
+ if (!pindexCheckpoint->IsInMainChain())
{
- if (!ValidateSyncCheckpoint(checkpointMessagePending.hashCheckpoint))
+ CBlock block;
+ if (!block.ReadFromDisk(pindexCheckpoint))
+ return error("AcceptPendingSyncCheckpoint: ReadFromDisk failed for sync checkpoint %s", hashPendingCheckpoint.ToString().c_str());
+ if (!block.SetBestChain(txdb, pindexCheckpoint))
{
- checkpointMessagePending.SetNull();
- return false;
+ hashInvalidCheckpoint = hashPendingCheckpoint;
+ return error("AcceptPendingSyncCheckpoint: SetBestChain failed for sync checkpoint %s", hashPendingCheckpoint.ToString().c_str());
}
- hashSyncCheckpoint = checkpointMessagePending.hashCheckpoint;
- checkpointMessage = checkpointMessagePending;
- checkpointMessagePending.SetNull();
- printf("AcceptPendingSyncCheckpoint : sync-checkpoint at %s\n", hashSyncCheckpoint.ToString().c_str());
- // relay the checkpoint
+ }
+
+#ifndef USE_LEVELDB
+ txdb.Close();
+#endif
+ 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 true;
+ }
return false;
}
- // ppcoin: automatic checkpoint (represented by height of checkpoint)
- int nAutoCheckpoint = 0;
- int nBranchPoint = 0; // branch point to alternative branch
+ // Automatically select a suitable sync-checkpoint
+ uint256 AutoSelectSyncCheckpoint()
+ {
+ const CBlockIndex *pindex = pindexBest;
+ // Search backward for a block within max span and maturity window
+ while (pindex->pprev && (pindex->GetBlockTime() + CHECKPOINT_MAX_SPAN > pindexBest->GetBlockTime() || pindex->nHeight + 8 > pindexBest->nHeight))
+ pindex = pindex->pprev;
+ return pindex->GetBlockHash();
+ }
- // ppcoin: check automatic checkpoint
- // To pass the check:
- // - All ancestors (including the block itself) have block index already
- // - The immediate ancestor in main chain must not have height less than
- // checkpoint height
- bool CheckAuto(const CBlockIndex *pindex)
+ // Check against synchronized checkpoint
+ bool CheckSync(const uint256& hashBlock, const CBlockIndex* pindexPrev)
{
- while (pindex)
+ if (fTestNet) return true; // Testnet has no checkpoints
+ int nHeight = pindexPrev->nHeight + 1;
+
+ LOCK(cs_hashSyncCheckpoint);
+ // sync-checkpoint should always be accepted block
+ assert(mapBlockIndex.count(hashSyncCheckpoint));
+ const CBlockIndex* pindexSync = mapBlockIndex[hashSyncCheckpoint];
+
+ if (nHeight > pindexSync->nHeight)
{
- if (pindex->IsInMainChain())
- {
- if (pindex->nHeight >= nAutoCheckpoint)
- return true;
- else
- {
- nBranchPoint = pindex->nHeight;
- return error("Checkpoints: new block on alternative branch at height=%d before auto checkpoint at height=%d", pindex->nHeight, nAutoCheckpoint);
- }
- }
- else
- pindex = pindex->pprev;
+ // 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
}
- return error("Checkpoints: failed to find any ancestor on main chain for the new block - internal error");
+ 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;
}
- // ppcoin: get next chain checkpoint
- int GetNextChainCheckpoint(const CBlockIndex *pindexLast)
+ bool WantedByPendingSyncCheckpoint(uint256 hashBlock)
{
- CBigNum bnTarget;
- CBigNum bnTargetMax = 0; // max target of all blocks since checkpoint
- CBigNum bnTargetMin = 0; // min target of all candidate checkpoints
- int nMinTargetHeight = 0; // min target height of candidate checkpoints
- int nCheckpointMin = 0; // minimum candidate checkpoint
- int nCheckpointMax = 0; // maximum candidate checkpoint
- int nDepth = pindexLast->nHeight - pindexLast->nCheckpoint;
- const CBlockIndex *pindex = pindexLast;
- while (nDepth >= 0 && pindex)
+ 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.first;
+ if (mapBlockIndex.count(hash) && !mapBlockIndex[hash]->IsInMainChain())
{
- bnTarget.SetCompact(pindex->nBits);
- if (bnTarget > bnTargetMax)
- bnTargetMax = bnTarget;
- if (nCheckpointMax > 0 && bnTarget < bnTargetMin)
+ // checkpoint block accepted but not yet in main chain
+ printf("ResetSyncCheckpoint: SetBestChain to hardened checkpoint %s\n", hash.ToString().c_str());
+ CTxDB txdb;
+ CBlock block;
+ if (!block.ReadFromDisk(mapBlockIndex[hash]))
+ return error("ResetSyncCheckpoint: ReadFromDisk failed for hardened checkpoint %s", hash.ToString().c_str());
+ if (!block.SetBestChain(txdb, mapBlockIndex[hash]))
{
- bnTargetMin = bnTarget;
- nMinTargetHeight = pindex->nHeight;
+ return error("ResetSyncCheckpoint: SetBestChain failed for hardened checkpoint %s", hash.ToString().c_str());
}
- if (nCheckpointMax == 0 && pindexLast->GetBlockTime() - pindex->GetBlockTime() > AUTO_CHECKPOINT_MIN_SPAN)
+
+#ifndef USE_LEVELDB
+ txdb.Close();
+#endif
+
+ }
+ 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.first;
+ if (mapBlockIndex.count(hash) && mapBlockIndex[hash]->IsInMainChain())
{
- nCheckpointMax = pindex->nHeight;
- bnTargetMin.SetCompact(pindex->nBits);
- nMinTargetHeight = pindex->nHeight;
+ 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;
}
- if (pindexLast->GetBlockTime() - pindex->GetBlockTime() < AUTO_CHECKPOINT_MAX_SPAN)
- nCheckpointMin = pindex->nHeight;
- pindex = pindex->pprev;
- nDepth--;
}
- assert (nDepth == -1); // arrive at chain checkpoint now
-
- printf("Checkpoints: min=%d max=%d tminheight=%d tmin=0x%08x tmax=0x%08x\n",
- nCheckpointMin, nCheckpointMax, nMinTargetHeight,
- bnTargetMin.GetCompact(), bnTargetMax.GetCompact());
- if (nCheckpointMax == 0) // checkpoint stays if max candidate not found
- return pindexLast->nCheckpoint;
-
- if (bnTargetMin * 100 > bnTargetMax * 90)
- return nCheckpointMax;
- if (bnTarget * 100 > bnTargetMax * 90)
- return nMinTargetHeight;
- else
- return nCheckpointMin;
+ return false;
}
- // ppcoin: get next auto checkpoint from the new chain checkpoint
- int GetNextAutoCheckpoint(int nCheckpoint)
+ void AskForPendingSyncCheckpoint(CNode* pfrom)
{
- return (std::max(nAutoCheckpoint, nCheckpoint));
+ LOCK(cs_hashSyncCheckpoint);
+ if (pfrom && hashPendingCheckpoint != 0 && (!mapBlockIndex.count(hashPendingCheckpoint)) && (!mapOrphanBlocks.count(hashPendingCheckpoint)))
+ pfrom->AskFor(CInv(MSG_BLOCK, hashPendingCheckpoint));
}
- // ppcoin: advance to next automatic checkpoint
- void AdvanceAutoCheckpoint(int nCheckpoint)
+ bool SetCheckpointPrivKey(std::string strPrivKey)
{
- nAutoCheckpoint = GetNextAutoCheckpoint(nCheckpoint);
- printf("Checkpoints: auto checkpoint now at height=%d\n", nAutoCheckpoint);
+ // Test signing a sync-checkpoint with genesis block
+ CSyncCheckpoint checkpoint;
+ checkpoint.hashCheckpoint = !fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet;
+ CDataStream sMsg(SER_NETWORK, PROTOCOL_VERSION);
+ sMsg << (CUnsignedSyncCheckpoint)checkpoint;
+ checkpoint.vchMsg = std::vector<unsigned char>(sMsg.begin(), sMsg.end());
+
+ std::vector<unsigned char> vchPrivKey = ParseHex(strPrivKey);
+ CKey key;
+ key.SetPrivKey(CPrivKey(vchPrivKey.begin(), vchPrivKey.end())); // if key is not correct openssl may crash
+ if (!key.Sign(Hash(checkpoint.vchMsg.begin(), checkpoint.vchMsg.end()), checkpoint.vchSig))
+ return false;
+
+ // Test signing successful, proceed
+ CSyncCheckpoint::strMasterPrivKey = strPrivKey;
+ return true;
}
- // ppcoin: reset auto checkpoint
- bool ResetAutoCheckpoint(int nCheckpoint)
+ bool SendSyncCheckpoint(uint256 hashCheckpoint)
{
- if (nCheckpoint <= 0 || nCheckpoint > nBestHeight)
- return error("ResetAutoCheckpoint() : new checkpoint invalid");
- if (nCheckpoint >= nAutoCheckpoint)
- return error("ResetAutoCheckpoint() : new checkpoint not earlier than current auto checkpoint");
- CTxDB txdb;
- txdb.TxnBegin();
- if (!txdb.WriteAutoCheckpoint(nCheckpoint, true))
- return error("ResetAutoCheckpoint() : database write failed");
- if (!txdb.TxnCommit())
- return error("ResetAutoCheckpoint() : database commit failed");
- nAutoCheckpoint = nCheckpoint;
- nBranchPoint = 0; // clear branch point
+ CSyncCheckpoint checkpoint;
+ checkpoint.hashCheckpoint = hashCheckpoint;
+ CDataStream sMsg(SER_NETWORK, PROTOCOL_VERSION);
+ sMsg << (CUnsignedSyncCheckpoint)checkpoint;
+ checkpoint.vchMsg = std::vector<unsigned char>(sMsg.begin(), sMsg.end());
+
+ if (CSyncCheckpoint::strMasterPrivKey.empty())
+ return error("SendSyncCheckpoint: Checkpoint master key unavailable.");
+ std::vector<unsigned char> vchPrivKey = ParseHex(CSyncCheckpoint::strMasterPrivKey);
+ CKey key;
+ key.SetPrivKey(CPrivKey(vchPrivKey.begin(), vchPrivKey.end())); // if key is not correct openssl may crash
+ if (!key.Sign(Hash(checkpoint.vchMsg.begin(), checkpoint.vchMsg.end()), checkpoint.vchSig))
+ return error("SendSyncCheckpoint: Unable to sign checkpoint, check private key?");
- // clear ban list to accept alternative branches
- CRITICAL_BLOCK(cs_vNodes)
+ if(!checkpoint.ProcessSyncCheckpoint(NULL))
{
- BOOST_FOREACH(CNode* pnode, vNodes)
- pnode->ClearBanned();
+ printf("WARNING: SendSyncCheckpoint: Failed to process checkpoint.\n");
+ return false;
}
+ // Relay checkpoint
+ {
+ LOCK(cs_vNodes);
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ checkpoint.RelayTo(pnode);
+ }
return true;
}
+
+ // Is the sync-checkpoint outside maturity window?
+ bool IsMatureSyncCheckpoint()
+ {
+ LOCK(cs_hashSyncCheckpoint);
+ // sync-checkpoint should always be accepted block
+ assert(mapBlockIndex.count(hashSyncCheckpoint));
+ const CBlockIndex* pindexSync = mapBlockIndex[hashSyncCheckpoint];
+ return (nBestHeight >= pindexSync->nHeight + nCoinbaseMaturity ||
+ pindexSync->GetBlockTime() + nStakeMinAge < GetAdjustedTime());
+ }
+}
+
+// ppcoin: sync-checkpoint master key
+const std::string CSyncCheckpoint::strMasterPubKey = "04a51b735f816de4ec3f891d5b38bbc91e1f7245c7c08d17990760b86b4d8fc3910a850ffecf73bfa8886f01739a0c4c4322201282d07b6e48ce931cc92af94850";
+
+std::string CSyncCheckpoint::strMasterPrivKey = "";
+
+// ppcoin: verify signature of sync-checkpoint message
+bool CSyncCheckpoint::CheckSignature()
+{
+ CKey key;
+ if (!key.SetPubKey(ParseHex(CSyncCheckpoint::strMasterPubKey)))
+ 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, SER_NETWORK, PROTOCOL_VERSION);
+ sMsg >> *(CUnsignedSyncCheckpoint*)this;
+ return true;
}
-// ppcoin: process synchronized checkpoint
+// process synchronized checkpoint
bool CSyncCheckpoint::ProcessSyncCheckpoint(CNode* pfrom)
{
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 accepted this block, 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);
- 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
+ CBlock block;
+ if (!block.ReadFromDisk(pindexCheckpoint))
+ return error("ProcessSyncCheckpoint: ReadFromDisk failed for sync checkpoint %s", hashCheckpoint.ToString().c_str());
+ if (!block.SetBestChain(txdb, pindexCheckpoint))
+ {
+ Checkpoints::hashInvalidCheckpoint = hashCheckpoint;
+ return error("ProcessSyncCheckpoint: SetBestChain failed for sync checkpoint %s", hashCheckpoint.ToString().c_str());
}
- if (!Checkpoints::ValidateSyncCheckpoint(hashCheckpoint))
- return false;
- Checkpoints::hashSyncCheckpoint = this->hashCheckpoint;
- Checkpoints::checkpointMessage = *this;
- Checkpoints::checkpointMessagePending.SetNull();
- printf("ProcessSyncCheckpoint : sync-checkpoint at %s\n", Checkpoints::hashSyncCheckpoint.ToString().c_str());
}
+
+#ifndef USE_LEVELDB
+ txdb.Close();
+#endif
+
+ 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;
}