Delete main.cpp

Delete main.cpp

--- src/main.cpp
+++ src/main.cpp
@@ -1,4898 +0,0 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2014 The Bitcoin developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#include "main.h"
-
-#include "addrman.h"
-#include "alert.h"
-#include "chainparams.h"
-#include "checkpoints.h"
-#include "checkqueue.h"
-#include "init.h"
-#include "merkleblock.h"
-#include "net.h"
-#include "pow.h"
-#include "txdb.h"
-#include "txmempool.h"
-#include "ui_interface.h"
-#include "util.h"
-#include "utilmoneystr.h"
-
-#include <sstream>
-
-#include <boost/algorithm/string/replace.hpp>
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/fstream.hpp>
-#include <boost/thread.hpp>
-
-using namespace boost;
-using namespace std;
-
-#if defined(NDEBUG)
-# error "Bata cannot be compiled without assertions."
-#endif
-
-/**
- * Global state
- */
-
-CCriticalSection cs_main;
-
-BlockMap mapBlockIndex;
-CChain chainActive;
-CBlockIndex *pindexBestHeader = NULL;
-int64_t nTimeBestReceived = 0;
-CWaitableCriticalSection csBestBlock;
-CConditionVariable cvBlockChange;
-int nScriptCheckThreads = 0;
-bool fImporting = false;
-bool fReindex = false;
-bool fTxIndex = false;
-bool fIsBareMultisigStd = true;
-bool fCheckBlockIndex = false;
-unsigned int nCoinCacheSize = 5000;
-bool fAlerts = DEFAULT_ALERTS;
-
-/** Fees smaller than this (in satoshi) are considered zero fee (for relaying and mining) */
-CFeeRate minRelayTxFee = CFeeRate(DEFAULT_TX_FEE);
-
-CTxMemPool mempool(::minRelayTxFee);
-
-struct COrphanTx {
-    CTransaction tx;
-    NodeId fromPeer;
-};
-map<uint256, COrphanTx> mapOrphanTransactions;
-map<uint256, set<uint256> > mapOrphanTransactionsByPrev;
-void EraseOrphansFor(NodeId peer);
-
-static void CheckBlockIndex();
-
-/** Constant stuff for coinbase transactions we create: */
-CScript COINBASE_FLAGS;
-
-const string strMessageMagic = "Bata Signed Message:\n";
-
-// Internal stuff
-namespace {
-
-    struct CBlockIndexWorkComparator
-    {
-        bool operator()(CBlockIndex *pa, CBlockIndex *pb) const {
-            // First sort by most total work, ...
-            if (pa->nChainWork > pb->nChainWork) return false;
-            if (pa->nChainWork < pb->nChainWork) return true;
-
-            // ... then by earliest time received, ...
-            if (pa->nSequenceId < pb->nSequenceId) return false;
-            if (pa->nSequenceId > pb->nSequenceId) return true;
-
-            // Use pointer address as tie breaker (should only happen with blocks
-            // loaded from disk, as those all have id 0).
-            if (pa < pb) return false;
-            if (pa > pb) return true;
-
-            // Identical blocks.
-            return false;
-        }
-    };
-
-    CBlockIndex *pindexBestInvalid;
-
-    /**
-     * The set of all CBlockIndex entries with BLOCK_VALID_TRANSACTIONS (for itself and all ancestors) and
-     * as good as our current tip or better. Entries may be failed, though.
-     */
-    set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexCandidates;
-    /** Number of nodes with fSyncStarted. */
-    int nSyncStarted = 0;
-    /** All pairs A->B, where A (or one if its ancestors) misses transactions, but B has transactions. */
-    multimap<CBlockIndex*, CBlockIndex*> mapBlocksUnlinked;
-
-    CCriticalSection cs_LastBlockFile;
-    std::vector<CBlockFileInfo> vinfoBlockFile;
-    int nLastBlockFile = 0;
-
-    /**
-     * Every received block is assigned a unique and increasing identifier, so we
-     * know which one to give priority in case of a fork.
-     */
-    CCriticalSection cs_nBlockSequenceId;
-    /** Blocks loaded from disk are assigned id 0, so start the counter at 1. */
-    uint32_t nBlockSequenceId = 1;
-
-    /**
-     * Sources of received blocks, to be able to send them reject messages or ban
-     * them, if processing happens afterwards. Protected by cs_main.
-     */
-    map<uint256, NodeId> mapBlockSource;
-
-    /** Blocks that are in flight, and that are in the queue to be downloaded. Protected by cs_main. */
-    struct QueuedBlock {
-        uint256 hash;
-        CBlockIndex *pindex;  //! Optional.
-        int64_t nTime;  //! Time of "getdata" request in microseconds.
-        int nValidatedQueuedBefore;  //! Number of blocks queued with validated headers (globally) at the time this one is requested.
-        bool fValidatedHeaders;  //! Whether this block has validated headers at the time of request.
-    };
-    map<uint256, pair<NodeId, list<QueuedBlock>::iterator> > mapBlocksInFlight;
-
-    /** Number of blocks in flight with validated headers. */
-    int nQueuedValidatedHeaders = 0;
-
-    /** Number of preferable block download peers. */
-    int nPreferredDownload = 0;
-
-    /** Dirty block index entries. */
-    set<CBlockIndex*> setDirtyBlockIndex;
-
-    /** Dirty block file entries. */
-    set<int> setDirtyFileInfo;
-} // anon namespace
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// dispatching functions
-//
-
-// These functions dispatch to one or all registered wallets
-
-namespace {
-
-struct CMainSignals {
-    /** Notifies listeners of updated transaction data (transaction, and optionally the block it is found in. */
-    boost::signals2::signal<void (const CTransaction &, const CBlock *)> SyncTransaction;
-    /** Notifies listeners of an erased transaction (currently disabled, requires transaction replacement). */
-    boost::signals2::signal<void (const uint256 &)> EraseTransaction;
-    /** Notifies listeners of an updated transaction without new data (for now: a coinbase potentially becoming visible). */
-    boost::signals2::signal<void (const uint256 &)> UpdatedTransaction;
-    /** Notifies listeners of a new active block chain. */
-    boost::signals2::signal<void (const CBlockLocator &)> SetBestChain;
-    /** Notifies listeners about an inventory item being seen on the network. */
-    boost::signals2::signal<void (const uint256 &)> Inventory;
-    /** Tells listeners to broadcast their data. */
-    boost::signals2::signal<void ()> Broadcast;
-    /** Notifies listeners of a block validation result */
-    boost::signals2::signal<void (const CBlock&, const CValidationState&)> BlockChecked;
-} g_signals;
-
-} // anon namespace
-
-void RegisterValidationInterface(CValidationInterface* pwalletIn) {
-    g_signals.SyncTransaction.connect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
-    g_signals.EraseTransaction.connect(boost::bind(&CValidationInterface::EraseFromWallet, pwalletIn, _1));
-    g_signals.UpdatedTransaction.connect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
-    g_signals.SetBestChain.connect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
-    g_signals.Inventory.connect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
-    g_signals.Broadcast.connect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn));
-    g_signals.BlockChecked.connect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2));
-}
-
-void UnregisterValidationInterface(CValidationInterface* pwalletIn) {
-    g_signals.BlockChecked.disconnect(boost::bind(&CValidationInterface::BlockChecked, pwalletIn, _1, _2));
-    g_signals.Broadcast.disconnect(boost::bind(&CValidationInterface::ResendWalletTransactions, pwalletIn));
-    g_signals.Inventory.disconnect(boost::bind(&CValidationInterface::Inventory, pwalletIn, _1));
-    g_signals.SetBestChain.disconnect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
-    g_signals.UpdatedTransaction.disconnect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
-    g_signals.EraseTransaction.disconnect(boost::bind(&CValidationInterface::EraseFromWallet, pwalletIn, _1));
-    g_signals.SyncTransaction.disconnect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
-}
-
-void UnregisterAllValidationInterfaces() {
-    g_signals.BlockChecked.disconnect_all_slots();
-    g_signals.Broadcast.disconnect_all_slots();
-    g_signals.Inventory.disconnect_all_slots();
-    g_signals.SetBestChain.disconnect_all_slots();
-    g_signals.UpdatedTransaction.disconnect_all_slots();
-    g_signals.EraseTransaction.disconnect_all_slots();
-    g_signals.SyncTransaction.disconnect_all_slots();
-}
-
-void SyncWithWallets(const CTransaction &tx, const CBlock *pblock) {
-    g_signals.SyncTransaction(tx, pblock);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Registration of network node signals.
-//
-
-namespace {
-
-struct CBlockReject {
-    unsigned char chRejectCode;
-    string strRejectReason;
-    uint256 hashBlock;
-};
-
-/**
- * Maintain validation-specific state about nodes, protected by cs_main, instead
- * by CNode's own locks. This simplifies asynchronous operation, where
- * processing of incoming data is done after the ProcessMessage call returns,
- * and we're no longer holding the node's locks.
- */
-struct CNodeState {
-    //! The peer's address
-    CService address;
-    //! Whether we have a fully established connection.
-    bool fCurrentlyConnected;
-    //! Accumulated misbehaviour score for this peer.
-    int nMisbehavior;
-    //! Whether this peer should be disconnected and banned (unless whitelisted).
-    bool fShouldBan;
-    //! String name of this peer (debugging/logging purposes).
-    std::string name;
-    //! List of asynchronously-determined block rejections to notify this peer about.
-    std::vector<CBlockReject> rejects;
-    //! The best known block we know this peer has announced.
-    CBlockIndex *pindexBestKnownBlock;
-    //! The hash of the last unknown block this peer has announced.
-    uint256 hashLastUnknownBlock;
-    //! The last full block we both have.
-    CBlockIndex *pindexLastCommonBlock;
-    //! Whether we've started headers synchronization with this peer.
-    bool fSyncStarted;
-    //! Since when we're stalling block download progress (in microseconds), or 0.
-    int64_t nStallingSince;
-    list<QueuedBlock> vBlocksInFlight;
-    int nBlocksInFlight;
-    //! Whether we consider this a preferred download peer.
-    bool fPreferredDownload;
-
-    CNodeState() {
-        fCurrentlyConnected = false;
-        nMisbehavior = 0;
-        fShouldBan = false;
-        pindexBestKnownBlock = NULL;
-        hashLastUnknownBlock = uint256(0);
-        pindexLastCommonBlock = NULL;
-        fSyncStarted = false;
-        nStallingSince = 0;
-        nBlocksInFlight = 0;
-        fPreferredDownload = false;
-    }
-};
-
-/** Map maintaining per-node state. Requires cs_main. */
-map<NodeId, CNodeState> mapNodeState;
-
-// Requires cs_main.
-CNodeState *State(NodeId pnode) {
-    map<NodeId, CNodeState>::iterator it = mapNodeState.find(pnode);
-    if (it == mapNodeState.end())
-        return NULL;
-    return &it->second;
-}
-
-int GetHeight()
-{
-    LOCK(cs_main);
-    return chainActive.Height();
-}
-
-void UpdatePreferredDownload(CNode* node, CNodeState* state)
-{
-    nPreferredDownload -= state->fPreferredDownload;
-
-    // Whether this node should be marked as a preferred download node.
-    state->fPreferredDownload = (!node->fInbound || node->fWhitelisted) && !node->fOneShot && !node->fClient;
-
-    nPreferredDownload += state->fPreferredDownload;
-}
-
-void InitializeNode(NodeId nodeid, const CNode *pnode) {
-    LOCK(cs_main);
-    CNodeState &state = mapNodeState.insert(std::make_pair(nodeid, CNodeState())).first->second;
-    state.name = pnode->addrName;
-    state.address = pnode->addr;
-}
-
-void FinalizeNode(NodeId nodeid) {
-    LOCK(cs_main);
-    CNodeState *state = State(nodeid);
-
-    if (state->fSyncStarted)
-        nSyncStarted--;
-
-    if (state->nMisbehavior == 0 && state->fCurrentlyConnected) {
-        AddressCurrentlyConnected(state->address);
-    }
-
-    BOOST_FOREACH(const QueuedBlock& entry, state->vBlocksInFlight)
-        mapBlocksInFlight.erase(entry.hash);
-    EraseOrphansFor(nodeid);
-    nPreferredDownload -= state->fPreferredDownload;
-
-    mapNodeState.erase(nodeid);
-}
-
-// Requires cs_main.
-void MarkBlockAsReceived(const uint256& hash) {
-    map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator itInFlight = mapBlocksInFlight.find(hash);
-    if (itInFlight != mapBlocksInFlight.end()) {
-        CNodeState *state = State(itInFlight->second.first);
-        nQueuedValidatedHeaders -= itInFlight->second.second->fValidatedHeaders;
-        state->vBlocksInFlight.erase(itInFlight->second.second);
-        state->nBlocksInFlight--;
-        state->nStallingSince = 0;
-        mapBlocksInFlight.erase(itInFlight);
-    }
-}
-
-// Requires cs_main.
-void MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, CBlockIndex *pindex = NULL) {
-    CNodeState *state = State(nodeid);
-    assert(state != NULL);
-
-    // Make sure it's not listed somewhere already.
-    MarkBlockAsReceived(hash);
-
-    QueuedBlock newentry = {hash, pindex, GetTimeMicros(), nQueuedValidatedHeaders, pindex != NULL};
-    nQueuedValidatedHeaders += newentry.fValidatedHeaders;
-    list<QueuedBlock>::iterator it = state->vBlocksInFlight.insert(state->vBlocksInFlight.end(), newentry);
-    state->nBlocksInFlight++;
-    mapBlocksInFlight[hash] = std::make_pair(nodeid, it);
-}
-
-/** Check whether the last unknown block a peer advertized is not yet known. */
-void ProcessBlockAvailability(NodeId nodeid) {
-    CNodeState *state = State(nodeid);
-    assert(state != NULL);
-
-    if (state->hashLastUnknownBlock != 0) {
-        BlockMap::iterator itOld = mapBlockIndex.find(state->hashLastUnknownBlock);
-        if (itOld != mapBlockIndex.end() && itOld->second->nChainWork > 0) {
-            if (state->pindexBestKnownBlock == NULL || itOld->second->nChainWork >= state->pindexBestKnownBlock->nChainWork)
-                state->pindexBestKnownBlock = itOld->second;
-            state->hashLastUnknownBlock = uint256(0);
-        }
-    }
-}
-
-/** Update tracking information about which blocks a peer is assumed to have. */
-void UpdateBlockAvailability(NodeId nodeid, const uint256 &hash) {
-    CNodeState *state = State(nodeid);
-    assert(state != NULL);
-
-    ProcessBlockAvailability(nodeid);
-
-    BlockMap::iterator it = mapBlockIndex.find(hash);
-    if (it != mapBlockIndex.end() && it->second->nChainWork > 0) {
-        // An actually better block was announced.
-        if (state->pindexBestKnownBlock == NULL || it->second->nChainWork >= state->pindexBestKnownBlock->nChainWork)
-            state->pindexBestKnownBlock = it->second;
-    } else {
-        // An unknown block was announced; just assume that the latest one is the best one.
-        state->hashLastUnknownBlock = hash;
-    }
-}
-
-/** Find the last common ancestor two blocks have.
- *  Both pa and pb must be non-NULL. */
-CBlockIndex* LastCommonAncestor(CBlockIndex* pa, CBlockIndex* pb) {
-    if (pa->nHeight > pb->nHeight) {
-        pa = pa->GetAncestor(pb->nHeight);
-    } else if (pb->nHeight > pa->nHeight) {
-        pb = pb->GetAncestor(pa->nHeight);
-    }
-
-    while (pa != pb && pa && pb) {
-        pa = pa->pprev;
-        pb = pb->pprev;
-    }
-
-    // Eventually all chain branches meet at the genesis block.
-    assert(pa == pb);
-    return pa;
-}
-
-/** Update pindexLastCommonBlock and add not-in-flight missing successors to vBlocks, until it has
- *  at most count entries. */
-void FindNextBlocksToDownload(NodeId nodeid, unsigned int count, std::vector<CBlockIndex*>& vBlocks, NodeId& nodeStaller) {
-    if (count == 0)
-        return;
-
-    vBlocks.reserve(vBlocks.size() + count);
-    CNodeState *state = State(nodeid);
-    assert(state != NULL);
-
-    // Make sure pindexBestKnownBlock is up to date, we'll need it.
-    ProcessBlockAvailability(nodeid);
-
-    if (state->pindexBestKnownBlock == NULL || state->pindexBestKnownBlock->nChainWork < chainActive.Tip()->nChainWork) {
-        // This peer has nothing interesting.
-        return;
-    }
-
-    if (state->pindexLastCommonBlock == NULL) {
-        // Bootstrap quickly by guessing a parent of our best tip is the forking point.
-        // Guessing wrong in either direction is not a problem.
-        state->pindexLastCommonBlock = chainActive[std::min(state->pindexBestKnownBlock->nHeight, chainActive.Height())];
-    }
-
-    // If the peer reorganized, our previous pindexLastCommonBlock may not be an ancestor
-    // of their current tip anymore. Go back enough to fix that.
-    state->pindexLastCommonBlock = LastCommonAncestor(state->pindexLastCommonBlock, state->pindexBestKnownBlock);
-    if (state->pindexLastCommonBlock == state->pindexBestKnownBlock)
-        return;
-
-    std::vector<CBlockIndex*> vToFetch;
-    CBlockIndex *pindexWalk = state->pindexLastCommonBlock;
-    // Never fetch further than the best block we know the peer has, or more than BLOCK_DOWNLOAD_WINDOW + 1 beyond the last
-    // linked block we have in common with this peer. The +1 is so we can detect stalling, namely if we would be able to
-    // download that next block if the window were 1 larger.
-    int nWindowEnd = state->pindexLastCommonBlock->nHeight + BLOCK_DOWNLOAD_WINDOW;
-    int nMaxHeight = std::min<int>(state->pindexBestKnownBlock->nHeight, nWindowEnd + 1);
-    NodeId waitingfor = -1;
-    while (pindexWalk->nHeight < nMaxHeight) {
-        // Read up to 128 (or more, if more blocks than that are needed) successors of pindexWalk (towards
-        // pindexBestKnownBlock) into vToFetch. We fetch 128, because CBlockIndex::GetAncestor may be as expensive
-        // as iterating over ~100 CBlockIndex* entries anyway.
-        int nToFetch = std::min(nMaxHeight - pindexWalk->nHeight, std::max<int>(count - vBlocks.size(), 128));
-        vToFetch.resize(nToFetch);
-        pindexWalk = state->pindexBestKnownBlock->GetAncestor(pindexWalk->nHeight + nToFetch);
-        vToFetch[nToFetch - 1] = pindexWalk;
-        for (unsigned int i = nToFetch - 1; i > 0; i--) {
-            vToFetch[i - 1] = vToFetch[i]->pprev;
-        }
-
-        // Iterate over those blocks in vToFetch (in forward direction), adding the ones that
-        // are not yet downloaded and not in flight to vBlocks. In the mean time, update
-        // pindexLastCommonBlock as long as all ancestors are already downloaded.
-        BOOST_FOREACH(CBlockIndex* pindex, vToFetch) {
-            if (!pindex->IsValid(BLOCK_VALID_TREE)) {
-                // We consider the chain that this peer is on invalid.
-                return;
-            }
-            if (pindex->nStatus & BLOCK_HAVE_DATA) {
-                if (pindex->nChainTx)
-                    state->pindexLastCommonBlock = pindex;
-            } else if (mapBlocksInFlight.count(pindex->GetBlockHash()) == 0) {
-                // The block is not already downloaded, and not yet in flight.
-                if (pindex->nHeight > nWindowEnd) {
-                    // We reached the end of the window.
-                    if (vBlocks.size() == 0 && waitingfor != nodeid) {
-                        // We aren't able to fetch anything, but we would be if the download window was one larger.
-                        nodeStaller = waitingfor;
-                    }
-                    return;
-                }
-                vBlocks.push_back(pindex);
-                if (vBlocks.size() == count) {
-                    return;
-                }
-            } else if (waitingfor == -1) {
-                // This is the first already-in-flight block.
-                waitingfor = mapBlocksInFlight[pindex->GetBlockHash()].first;
-            }
-        }
-    }
-}
-
-} // anon namespace
-
-bool GetNodeStateStats(NodeId nodeid, CNodeStateStats &stats) {
-    LOCK(cs_main);
-    CNodeState *state = State(nodeid);
-    if (state == NULL)
-        return false;
-    stats.nMisbehavior = state->nMisbehavior;
-    stats.nSyncHeight = state->pindexBestKnownBlock ? state->pindexBestKnownBlock->nHeight : -1;
-    stats.nCommonHeight = state->pindexLastCommonBlock ? state->pindexLastCommonBlock->nHeight : -1;
-    BOOST_FOREACH(const QueuedBlock& queue, state->vBlocksInFlight) {
-        if (queue.pindex)
-            stats.vHeightInFlight.push_back(queue.pindex->nHeight);
-    }
-    return true;
-}
-
-void RegisterNodeSignals(CNodeSignals& nodeSignals)
-{
-    nodeSignals.GetHeight.connect(&GetHeight);
-    nodeSignals.ProcessMessages.connect(&ProcessMessages);
-    nodeSignals.SendMessages.connect(&SendMessages);
-    nodeSignals.InitializeNode.connect(&InitializeNode);
-    nodeSignals.FinalizeNode.connect(&FinalizeNode);
-}
-
-void UnregisterNodeSignals(CNodeSignals& nodeSignals)
-{
-    nodeSignals.GetHeight.disconnect(&GetHeight);
-    nodeSignals.ProcessMessages.disconnect(&ProcessMessages);
-    nodeSignals.SendMessages.disconnect(&SendMessages);
-    nodeSignals.InitializeNode.disconnect(&InitializeNode);
-    nodeSignals.FinalizeNode.disconnect(&FinalizeNode);
-}
-
-CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& locator)
-{
-    // Find the first block the caller has in the main chain
-    BOOST_FOREACH(const uint256& hash, locator.vHave) {
-        BlockMap::iterator mi = mapBlockIndex.find(hash);
-        if (mi != mapBlockIndex.end())
-        {
-            CBlockIndex* pindex = (*mi).second;
-            if (chain.Contains(pindex))
-                return pindex;
-        }
-    }
-    return chain.Genesis();
-}
-
-CCoinsViewCache *pcoinsTip = NULL;
-CBlockTreeDB *pblocktree = NULL;
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// mapOrphanTransactions
-//
-
-bool AddOrphanTx(const CTransaction& tx, NodeId peer)
-{
-return true;
-
-    //uint256 hash = tx.GetHash();
-    //if (mapOrphanTransactions.count(hash))
-    //    return false;
-
-    // Ignore big transactions, to avoid a
-    // send-big-orphans memory exhaustion attack. If a peer has a legitimate
-    // large transaction with a missing parent then we assume
-    // it will rebroadcast it later, after the parent transaction(s)
-    // have been mined or received.
-    // 10,000 orphans, each of which is at most 5,000 bytes big is
-    // at most 500 megabytes of orphans:
-    //unsigned int sz = tx.GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
-    //if (sz > 5000)
-    //{
-    //    LogPrint("mempool", "ignoring large orphan tx (size: %u, hash: %s)\n", sz, hash.ToString());
-     //   return false;
-    //}
-
-    //mapOrphanTransactions[hash].tx = tx;
-    //mapOrphanTransactions[hash].fromPeer = peer;
-    //BOOST_FOREACH(const CTxIn& txin, tx.vin)
-   //     mapOrphanTransactionsByPrev[txin.prevout.hash].insert(hash);
-
-   // LogPrint("mempool", "stored orphan tx %s (mapsz %u prevsz %u)\n", hash.ToString(),
-   //          mapOrphanTransactions.size(), mapOrphanTransactionsByPrev.size());
-   // return true;
-}
-
-void static EraseOrphanTx(uint256 hash)
-{
-    map<uint256, COrphanTx>::iterator it = mapOrphanTransactions.find(hash);
-    if (it == mapOrphanTransactions.end())
-        return;
-    BOOST_FOREACH(const CTxIn& txin, it->second.tx.vin)
-    {
-        map<uint256, set<uint256> >::iterator itPrev = mapOrphanTransactionsByPrev.find(txin.prevout.hash);
-        if (itPrev == mapOrphanTransactionsByPrev.end())
-            continue;
-        itPrev->second.erase(hash);
-        if (itPrev->second.empty())
-            mapOrphanTransactionsByPrev.erase(itPrev);
-    }
-    mapOrphanTransactions.erase(it);
-}
-
-void EraseOrphansFor(NodeId peer)
-{
-    int nErased = 0;
-    map<uint256, COrphanTx>::iterator iter = mapOrphanTransactions.begin();
-    while (iter != mapOrphanTransactions.end())
-    {
-        map<uint256, COrphanTx>::iterator maybeErase = iter++; // increment to avoid iterator becoming invalid
-        if (maybeErase->second.fromPeer == peer)
-        {
-            EraseOrphanTx(maybeErase->second.tx.GetHash());
-            ++nErased;
-        }
-    }
-    if (nErased > 0) LogPrint("mempool", "Erased %d orphan tx from peer %d\n", nErased, peer);
-}
-
-
-unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
-{
-    unsigned int nEvicted = 0;
-    while (mapOrphanTransactions.size() > nMaxOrphans)
-    {
-        // Evict a random orphan:
-        uint256 randomhash = GetRandHash();
-        map<uint256, COrphanTx>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
-        if (it == mapOrphanTransactions.end())
-            it = mapOrphanTransactions.begin();
-        EraseOrphanTx(it->first);
-        ++nEvicted;
-    }
-    return nEvicted;
-}
-
-
-
-
-
-
-
-bool IsStandardTx(const CTransaction& tx, string& reason)
-{
-    AssertLockHeld(cs_main);
-    if (tx.nVersion > CTransaction::CURRENT_VERSION || tx.nVersion < 1) {
-        reason = "version";
-        return false;
-    }
-
-    // Treat non-final transactions as non-standard to prevent a specific type
-    // of double-spend attack, as well as DoS attacks. (if the transaction
-    // can't be mined, the attacker isn't expending resources broadcasting it)
-    // Basically we don't want to propagate transactions that can't be included in
-    // the next block.
-    //
-    // However, IsFinalTx() is confusing... Without arguments, it uses
-    // chainActive.Height() to evaluate nLockTime; when a block is accepted, chainActive.Height()
-    // is set to the value of nHeight in the block. However, when IsFinalTx()
-    // is called within CBlock::AcceptBlock(), the height of the block *being*
-    // evaluated is what is used. Thus if we want to know if a transaction can
-    // be part of the *next* block, we need to call IsFinalTx() with one more
-    // than chainActive.Height().
-    //
-    // Timestamps on the other hand don't get any special treatment, because we
-    // can't know what timestamp the next block will have, and there aren't
-    // timestamp applications where it matters.
-    if (!IsFinalTx(tx, chainActive.Height() + 1)) {
-        reason = "non-final";
-        return false;
-    }
-
-    // Extremely large transactions with lots of inputs can cost the network
-    // almost as much to process as they cost the sender in fees, because
-    // computing signature hashes is O(ninputs*txsize). Limiting transactions
-    // to MAX_STANDARD_TX_SIZE mitigates CPU exhaustion attacks.
-    unsigned int sz = tx.GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
-    if (sz >= MAX_STANDARD_TX_SIZE) {
-        reason = "tx-size";
-        return false;
-    }
-
-    BOOST_FOREACH(const CTxIn& txin, tx.vin)
-    {
-        // Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed
-        // keys. (remember the 520 byte limit on redeemScript size) That works
-        // out to a (15*(33+1))+3=513 byte redeemScript, 513+1+15*(73+1)+3=1627
-        // bytes of scriptSig, which we round off to 1650 bytes for some minor
-        // future-proofing. That's also enough to spend a 20-of-20
-        // CHECKMULTISIG scriptPubKey, though such a scriptPubKey is not
-        // considered standard)
-        if (txin.scriptSig.size() > 1650) {
-            reason = "scriptsig-size";
-            return false;
-        }
-        if (!txin.scriptSig.IsPushOnly()) {
-            reason = "scriptsig-not-pushonly";
-            return false;
-        }
-    }
-
-    unsigned int nDataOut = 0;
-    txnouttype whichType;
-    BOOST_FOREACH(const CTxOut& txout, tx.vout) {
-        if (!::IsStandard(txout.scriptPubKey, whichType)) {
-            reason = "scriptpubkey";
-            return false;
-        }
-
-        if (whichType == TX_NULL_DATA)
-            nDataOut++;
-        else if ((whichType == TX_MULTISIG) && (!fIsBareMultisigStd)) {
-            reason = "bare-multisig";
-            return false;
-        } else if (txout.IsDust(::minRelayTxFee)) {
-            reason = "dust";
-            return false;
-        }
-    }
-
-    // only one OP_RETURN txout is permitted
-    if (nDataOut > 1) {
-        reason = "multi-op-return";
-        return false;
-    }
-
-    return true;
-}
-
-bool IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime)
-{
-    AssertLockHeld(cs_main);
-    // Time based nLockTime implemented in 0.1.6
-    if (tx.nLockTime == 0)
-        return true;
-    if (nBlockHeight == 0)
-        nBlockHeight = chainActive.Height();
-    if (nBlockTime == 0)
-        nBlockTime = GetAdjustedTime();
-    if ((int64_t)tx.nLockTime < ((int64_t)tx.nLockTime < LOCKTIME_THRESHOLD ? (int64_t)nBlockHeight : nBlockTime))
-        return true;
-    BOOST_FOREACH(const CTxIn& txin, tx.vin)
-        if (!txin.IsFinal())
-            return false;
-    return true;
-}
-
-/**
- * Check transaction inputs to mitigate two
- * potential denial-of-service attacks:
- *
- * 1. scriptSigs with extra data stuffed into them,
- *    not consumed by scriptPubKey (or P2SH script)
- * 2. P2SH scripts with a crazy number of expensive
- *    CHECKSIG/CHECKMULTISIG operations
- */
-bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs)
-{
-    if (tx.IsCoinBase())
-        return true; // Coinbases don't use vin normally
-
-    for (unsigned int i = 0; i < tx.vin.size(); i++)
-    {
-        const CTxOut& prev = mapInputs.GetOutputFor(tx.vin[i]);
-
-        vector<vector<unsigned char> > vSolutions;
-        txnouttype whichType;
-        // get the scriptPubKey corresponding to this input:
-        const CScript& prevScript = prev.scriptPubKey;
-        if (!Solver(prevScript, whichType, vSolutions))
-            return false;
-        int nArgsExpected = ScriptSigArgsExpected(whichType, vSolutions);
-        if (nArgsExpected < 0)
-            return false;
-
-        // Transactions with extra stuff in their scriptSigs are
-        // non-standard. Note that this EvalScript() call will
-        // be quick, because if there are any operations
-        // beside "push data" in the scriptSig
-        // IsStandard() will have already returned false
-        // and this method isn't called.
-        vector<vector<unsigned char> > stack;
-        if (!EvalScript(stack, tx.vin[i].scriptSig, false, BaseSignatureChecker()))
-            return false;
-
-        if (whichType == TX_SCRIPTHASH)
-        {
-            if (stack.empty())
-                return false;
-            CScript subscript(stack.back().begin(), stack.back().end());
-            vector<vector<unsigned char> > vSolutions2;
-            txnouttype whichType2;
-            if (Solver(subscript, whichType2, vSolutions2))
-            {
-                int tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2);
-                if (tmpExpected < 0)
-                    return false;
-                nArgsExpected += tmpExpected;
-            }
-            else
-            {
-                // Any other Script with less than 15 sigops OK:
-                unsigned int sigops = subscript.GetSigOpCount(true);
-                // ... extra data left on the stack after execution is OK, too:
-                return (sigops <= MAX_P2SH_SIGOPS);
-            }
-        }
-
-        if (stack.size() != (unsigned int)nArgsExpected)
-            return false;
-    }
-
-    return true;
-}
-
-unsigned int GetLegacySigOpCount(const CTransaction& tx)
-{
-    unsigned int nSigOps = 0;
-    BOOST_FOREACH(const CTxIn& txin, tx.vin)
-    {
-        nSigOps += txin.scriptSig.GetSigOpCount(false);
-    }
-    BOOST_FOREACH(const CTxOut& txout, tx.vout)
-    {
-        nSigOps += txout.scriptPubKey.GetSigOpCount(false);
-    }
-    return nSigOps;
-}
-
-unsigned int GetP2SHSigOpCount(const CTransaction& tx, const CCoinsViewCache& inputs)
-{
-    if (tx.IsCoinBase())
-        return 0;
-
-    unsigned int nSigOps = 0;
-    for (unsigned int i = 0; i < tx.vin.size(); i++)
-    {
-        const CTxOut &prevout = inputs.GetOutputFor(tx.vin[i]);
-        if (prevout.scriptPubKey.IsPayToScriptHash())
-            nSigOps += prevout.scriptPubKey.GetSigOpCount(tx.vin[i].scriptSig);
-    }
-    return nSigOps;
-}
-
-
-
-
-
-
-
-
-bool CheckTransaction(const CTransaction& tx, CValidationState &state)
-{
-    // Basic checks that don't depend on any context
-    if (tx.vin.empty())
-        return state.DoS(10, error("CheckTransaction() : vin empty"),
-                         REJECT_INVALID, "bad-txns-vin-empty");
-    if (tx.vout.empty())
-        return state.DoS(10, error("CheckTransaction() : vout empty"),
-                         REJECT_INVALID, "bad-txns-vout-empty");
-    // Size limits
-    if (::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
-        return state.DoS(100, error("CheckTransaction() : size limits failed"),
-                         REJECT_INVALID, "bad-txns-oversize");
-
-    // Check for negative or overflow output values
-    CAmount nValueOut = 0;
-    BOOST_FOREACH(const CTxOut& txout, tx.vout)
-    {
-        if (txout.nValue < 0)
-            return state.DoS(100, error("CheckTransaction() : txout.nValue negative"),
-                             REJECT_INVALID, "bad-txns-vout-negative");
-        if (txout.nValue > MAX_MONEY)
-            return state.DoS(100, error("CheckTransaction() : txout.nValue too high"),
-                             REJECT_INVALID, "bad-txns-vout-toolarge");
-        nValueOut += txout.nValue;
-        if (!MoneyRange(nValueOut))
-            return state.DoS(100, error("CheckTransaction() : txout total out of range"),
-                             REJECT_INVALID, "bad-txns-txouttotal-toolarge");
-    }
-
-    // Check for duplicate inputs
-    set<COutPoint> vInOutPoints;
-    BOOST_FOREACH(const CTxIn& txin, tx.vin)
-    {
-        if (vInOutPoints.count(txin.prevout))
-            return state.DoS(100, error("CheckTransaction() : duplicate inputs"),
-                             REJECT_INVALID, "bad-txns-inputs-duplicate");
-        vInOutPoints.insert(txin.prevout);
-    }
-
-    if (tx.IsCoinBase())
-    {
-        if (tx.vin[0].scriptSig.size() < 2 || tx.vin[0].scriptSig.size() > 100)
-            return state.DoS(100, error("CheckTransaction() : coinbase script size"),
-                             REJECT_INVALID, "bad-cb-length");
-    }
-    else
-    {
-        BOOST_FOREACH(const CTxIn& txin, tx.vin)
-            if (txin.prevout.IsNull())
-                return state.DoS(10, error("CheckTransaction() : prevout is null"),
-                                 REJECT_INVALID, "bad-txns-prevout-null");
-    }
-
-    return true;
-}
-
-CAmount GetMinRelayFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree)
-{
-    {
-        LOCK(mempool.cs);
-        uint256 hash = tx.GetHash();
-        double dPriorityDelta = 0;
-        CAmount nFeeDelta = 0;
-        mempool.ApplyDeltas(hash, dPriorityDelta, nFeeDelta);
-        if (dPriorityDelta > 0 || nFeeDelta > 0)
-            return 0;
-    }
-
-    // Litecoin
-    // To limit dust spam, add 1000 byte penalty for each output smaller than DUST_THRESHOLD
-    BOOST_FOREACH(const CTxOut& txout, tx.vout)
-        if (txout.nValue < DUST_THRESHOLD)
-        {
-            nBytes += 1000;
-            fAllowFree = false;
-        }
-
-    CAmount nMinFee = ::minRelayTxFee.GetFee(nBytes);
-
-    if (fAllowFree)
-    {
-        // There is a free transaction area in blocks created by most miners,
-        // * If we are relaying we allow transactions up to DEFAULT_BLOCK_PRIORITY_SIZE - 1000
-        //   to be considered to fall into this category. We don't want to encourage sending
-        //   multiple transactions instead of one big transaction to avoid fees.
-        if (nBytes < (DEFAULT_BLOCK_PRIORITY_SIZE - 1000))
-            nMinFee = 0;
-    }
-
-    if (!MoneyRange(nMinFee))
-        nMinFee = MAX_MONEY;
-    return nMinFee;
-}
-
-
-bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransaction &tx, bool fLimitFree,
-                        bool* pfMissingInputs, bool fRejectInsaneFee)
-{
-    AssertLockHeld(cs_main);
-    if (pfMissingInputs)
-        *pfMissingInputs = false;
-
-    if (!CheckTransaction(tx, state))
-        return error("AcceptToMemoryPool: : CheckTransaction failed");
-
-    // Coinbase is only valid in a block, not as a loose transaction
-    if (tx.IsCoinBase())
-        return state.DoS(100, error("AcceptToMemoryPool: : coinbase as individual tx"),
-                         REJECT_INVALID, "coinbase");
-
-    // Rather not work on nonstandard transactions (unless -testnet/-regtest)
-    string reason;
-    if (Params().RequireStandard() && !IsStandardTx(tx, reason))
-        return state.DoS(0,
-                         error("AcceptToMemoryPool : nonstandard transaction: %s", reason),
-                         REJECT_NONSTANDARD, reason);
-
-    // is it already in the memory pool?
-    uint256 hash = tx.GetHash();
-    if (pool.exists(hash))
-        return false;
-
-    // Check for conflicts with in-memory transactions
-    {
-    LOCK(pool.cs); // protect pool.mapNextTx
-    for (unsigned int i = 0; i < tx.vin.size(); i++)
-    {
-        COutPoint outpoint = tx.vin[i].prevout;
-        if (pool.mapNextTx.count(outpoint))
-        {
-            // Disable replacement feature for now
-            return false;
-        }
-        }
-    }
-
-    {
-        CCoinsView dummy;
-        CCoinsViewCache view(&dummy);
-
-        CAmount nValueIn = 0;
-        {
-        LOCK(pool.cs);
-        CCoinsViewMemPool viewMemPool(pcoinsTip, pool);
-        view.SetBackend(viewMemPool);
-
-        // do we already have it?
-        if (view.HaveCoins(hash))
-            return false;
-
-        // do all inputs exist?
-        // Note that this does not check for the presence of actual outputs (see the next check for that),
-        // only helps filling in pfMissingInputs (to determine missing vs spent).
-        BOOST_FOREACH(const CTxIn txin, tx.vin) {
-            if (!view.HaveCoins(txin.prevout.hash)) {
-                if (pfMissingInputs)
-                    *pfMissingInputs = true;
-                return false;
-            }
-        }
-
-        // are the actual inputs available?
-        if (!view.HaveInputs(tx))
-            return state.Invalid(error("AcceptToMemoryPool : inputs already spent"),
-                                 REJECT_DUPLICATE, "bad-txns-inputs-spent");
-
-        // Bring the best block into scope
-        view.GetBestBlock();
-
-        nValueIn = view.GetValueIn(tx);
-
-        // we have all inputs cached now, so switch back to dummy, so we don't need to keep lock on mempool
-        view.SetBackend(dummy);
-        }
-
-        // Check for non-standard pay-to-script-hash in inputs
-        if (Params().RequireStandard() && !AreInputsStandard(tx, view))
-            return error("AcceptToMemoryPool: : nonstandard transaction input");
-
-        // Check that the transaction doesn't have an excessive number of
-        // sigops, making it impossible to mine. Since the coinbase transaction
-        // itself can contain sigops MAX_TX_SIGOPS is less than
-        // MAX_BLOCK_SIGOPS; we still consider this an invalid rather than
-        // merely non-standard transaction.
-        unsigned int nSigOps = GetLegacySigOpCount(tx);
-        nSigOps += GetP2SHSigOpCount(tx, view);
-        if (nSigOps > MAX_TX_SIGOPS)
-            return state.DoS(0,
-                             error("AcceptToMemoryPool : too many sigops %s, %d > %d",
-                                   hash.ToString(), nSigOps, MAX_TX_SIGOPS),
-                             REJECT_NONSTANDARD, "bad-txns-too-many-sigops");
-
-        CAmount nValueOut = tx.GetValueOut();
-        CAmount nFees = nValueIn-nValueOut;
-        double dPriority = view.GetPriority(tx, chainActive.Height());
-
-        CTxMemPoolEntry entry(tx, nFees, GetTime(), dPriority, chainActive.Height());
-        unsigned int nSize = entry.GetTxSize();
-
-        // Don't accept it if it can't get into a block
-        CAmount txMinFee = GetMinRelayFee(tx, nSize, true);
-        if (fLimitFree && nFees < txMinFee)
-            return state.DoS(0, error("AcceptToMemoryPool : not enough fees %s, %d < %d",
-                                      hash.ToString(), nFees, txMinFee),
-                             REJECT_INSUFFICIENTFEE, "insufficient fee");
-
-        // Require that free transactions have sufficient priority to be mined in the next block.
-        if (GetBoolArg("-relaypriority", true) && nFees < ::minRelayTxFee.GetFee(nSize) && !AllowFree(view.GetPriority(tx, chainActive.Height() + 1))) {
-            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "insufficient priority");
-        }
-
-        // Continuously rate-limit free (really, very-low-fee) transactions
-        // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
-        // be annoying or make others' transactions take longer to confirm.
-        if (fLimitFree && nFees < ::minRelayTxFee.GetFee(nSize))
-        {
-            static CCriticalSection csFreeLimiter;
-            static double dFreeCount;
-            static int64_t nLastTime;
-            int64_t nNow = GetTime();
-
-            LOCK(csFreeLimiter);
-
-            // Use an exponentially decaying ~10-minute window:
-            dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
-            nLastTime = nNow;
-            // -limitfreerelay unit is thousand-bytes-per-minute
-            // At default rate it would take over a month to fill 1GB
-            if (dFreeCount >= GetArg("-limitfreerelay", 15)*10*1000)
-                return state.DoS(0, error("AcceptToMemoryPool : free transaction rejected by rate limiter"),
-                                 REJECT_INSUFFICIENTFEE, "rate limited free transaction");
-            LogPrint("mempool", "Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
-            dFreeCount += nSize;
-        }
-
-        if (fRejectInsaneFee && nFees > ::minRelayTxFee.GetFee(nSize) * 10000)
-            return error("AcceptToMemoryPool: : insane fees %s, %d > %d",
-                         hash.ToString(),
-                         nFees, ::minRelayTxFee.GetFee(nSize) * 10000);
-
-        // Check against previous transactions
-        // This is done last to help prevent CPU exhaustion denial-of-service attacks.
-        if (!CheckInputs(tx, state, view, true, STANDARD_SCRIPT_VERIFY_FLAGS, true))
-        {
-            return error("AcceptToMemoryPool: : ConnectInputs failed %s", hash.ToString());
-        }
-
-        // Check again against just the consensus-critical mandatory script
-        // verification flags, in case of bugs in the standard flags that cause
-        // transactions to pass as valid when they're actually invalid. For
-        // instance the STRICTENC flag was incorrectly allowing certain
-        // CHECKSIG NOT scripts to pass, even though they were invalid.
-        //
-        // There is a similar check in CreateNewBlock() to prevent creating
-        // invalid blocks, however allowing such transactions into the mempool
-        // can be exploited as a DoS attack.
-        if (!CheckInputs(tx, state, view, true, MANDATORY_SCRIPT_VERIFY_FLAGS, true))
-        {
-            return error("AcceptToMemoryPool: : BUG! PLEASE REPORT THIS! ConnectInputs failed against MANDATORY but not STANDARD flags %s", hash.ToString());
-        }
-
-        // Store transaction in memory
-        pool.addUnchecked(hash, entry);
-    }
-
-    SyncWithWallets(tx, NULL);
-
-    return true;
-}
-
-/** Return transaction in tx, and if it was found inside a block, its hash is placed in hashBlock */
-bool GetTransaction(const uint256 &hash, CTransaction &txOut, uint256 &hashBlock, bool fAllowSlow)
-{
-    CBlockIndex *pindexSlow = NULL;
-
-    LOCK(cs_main);
-
-    if (mempool.lookup(hash, txOut))
-    {
-        return true;
-    }
-
-    if (fTxIndex) {
-        CDiskTxPos postx;
-        if (pblocktree->ReadTxIndex(hash, postx)) {
-            CAutoFile file(OpenBlockFile(postx, true), SER_DISK, CLIENT_VERSION);
-            if (file.IsNull())
-                return error("%s: OpenBlockFile failed", __func__);
-            CBlockHeader header;
-            try {
-                file >> header;
-                fseek(file.Get(), postx.nTxOffset, SEEK_CUR);
-                file >> txOut;
-            } catch (std::exception &e) {
-                return error("%s : Deserialize or I/O error - %s", __func__, e.what());
-            }
-            hashBlock = header.GetHash();
-            if (txOut.GetHash() != hash)
-                return error("%s : txid mismatch", __func__);
-            return true;
-        }
-    }
-
-    if (fAllowSlow) { // use coin database to locate block that contains transaction, and scan it
-        int nHeight = -1;
-        {
-            CCoinsViewCache &view = *pcoinsTip;
-            const CCoins* coins = view.AccessCoins(hash);
-            if (coins)
-                nHeight = coins->nHeight;
-        }
-        if (nHeight > 0)
-            pindexSlow = chainActive[nHeight];
-    }
-
-    if (pindexSlow) {
-        CBlock block;
-        if (ReadBlockFromDisk(block, pindexSlow)) {
-            BOOST_FOREACH(const CTransaction &tx, block.vtx) {
-                if (tx.GetHash() == hash) {
-                    txOut = tx;
-                    hashBlock = pindexSlow->GetBlockHash();
-                    return true;
-                }
-            }
-        }
-    }
-
-    return false;
-}
-
-
-
-
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// CBlock and CBlockIndex
-//
-
-bool WriteBlockToDisk(CBlock& block, CDiskBlockPos& pos)
-{
-    // Open history file to append
-    CAutoFile fileout(OpenBlockFile(pos), SER_DISK, CLIENT_VERSION);
-    if (fileout.IsNull())
-        return error("WriteBlockToDisk : OpenBlockFile failed");
-
-    // Write index header
-    unsigned int nSize = fileout.GetSerializeSize(block);
-    fileout << FLATDATA(Params().MessageStart()) << nSize;
-
-    // Write block
-    long fileOutPos = ftell(fileout.Get());
-    if (fileOutPos < 0)
-        return error("WriteBlockToDisk : ftell failed");
-    pos.nPos = (unsigned int)fileOutPos;
-    fileout << block;
-
-    return true;
-}
-
-bool ReadBlockFromDisk(CBlock& block, const CDiskBlockPos& pos)
-{
-    block.SetNull();
-
-    // Open history file to read
-    CAutoFile filein(OpenBlockFile(pos, true), SER_DISK, CLIENT_VERSION);
-    if (filein.IsNull())
-        return error("ReadBlockFromDisk : OpenBlockFile failed");
-
-    // Read block
-    try {
-        filein >> block;
-    }
-    catch (std::exception &e) {
-        return error("%s : Deserialize or I/O error - %s", __func__, e.what());
-    }
-
-    // Check the header
-    if (!CheckProofOfWork(block.GetPoWHash(), block.nBits))
-        return error("ReadBlockFromDisk : Errors in block header");
-
-    return true;
-}
-
-bool ReadBlockFromDisk(CBlock& block, const CBlockIndex* pindex)
-{
-    if (!ReadBlockFromDisk(block, pindex->GetBlockPos()))
-        return false;
-    if (block.GetHash() != pindex->GetBlockHash())
-        return error("ReadBlockFromDisk(CBlock&, CBlockIndex*) : GetHash() doesn't match index");
-    return true;
-}
-
-CAmount GetBlockValue(int nHeight, const CAmount& nFees)
-{
-    CAmount nSubsidy = 25 * COIN;
-    int halvings = nHeight / Params().SubsidyHalvingInterval();
-
-    // Force block reward to zero when right shift is undefined.
-    if (halvings >= 64)
-        return nFees;
-
-    if (nHeight == 1)
-        nSubsidy = 88 * COIN;
-
-    if (nHeight == 2)
-        nSubsidy = 1 * COIN;
-
-    // Subsidy is cut in half every 210,000 blocks which will occur approximately every 4 years.
-    nSubsidy >>= halvings;
-
-    return nSubsidy + nFees;
-}
-
-bool IsInitialBlockDownload()
-{
-    const CChainParams& chainParams = Params();
-    LOCK(cs_main);
-    if (fImporting || fReindex || chainActive.Height() < Checkpoints::GetTotalBlocksEstimate())
-        return true;
-    static bool lockIBDState = false;
-    if (lockIBDState)
-        return false;
-    bool state = (chainActive.Height() < pindexBestHeader->nHeight - 24 * 6 ||
-            pindexBestHeader->GetBlockTime() < GetTime() - chainParams.MaxTipAge());
-    if (!state)
-        lockIBDState = true;
-    return state;
-}
-
-bool fLargeWorkForkFound = false;
-bool fLargeWorkInvalidChainFound = false;
-CBlockIndex *pindexBestForkTip = NULL, *pindexBestForkBase = NULL;
-
-void CheckForkWarningConditions()
-{
-    AssertLockHeld(cs_main);
-    // Before we get past initial download, we cannot reliably alert about forks
-    // (we assume we don't get stuck on a fork before the last checkpoint)
-    if (IsInitialBlockDownload())
-        return;
-
-    // If our best fork is no longer within 72 blocks (+/- 12 hours if no one mines it)
-    // of our head, drop it
-    if (pindexBestForkTip && chainActive.Height() - pindexBestForkTip->nHeight >= 72)
-        pindexBestForkTip = NULL;
-
-    if (pindexBestForkTip || (pindexBestInvalid && pindexBestInvalid->nChainWork > chainActive.Tip()->nChainWork + (GetBlockProof(*chainActive.Tip()) * 6)))
-    {
-        if (!fLargeWorkForkFound && pindexBestForkBase)
-        {
-            std::string warning = std::string("'Warning: Large-work fork detected, forking after block ") +
-                pindexBestForkBase->phashBlock->ToString() + std::string("'");
-            CAlert::Notify(warning, true);
-        }
-        if (pindexBestForkTip && pindexBestForkBase)
-        {
-            LogPrintf("CheckForkWarningConditions: Warning: Large valid fork found\n  forking the chain at height %d (%s)\n  lasting to height %d (%s).\nChain state database corruption likely.\n",
-                   pindexBestForkBase->nHeight, pindexBestForkBase->phashBlock->ToString(),
-                   pindexBestForkTip->nHeight, pindexBestForkTip->phashBlock->ToString());
-            fLargeWorkForkFound = true;
-        }
-        else
-        {
-            LogPrintf("CheckForkWarningConditions: Warning: Found invalid chain at least ~6 blocks longer than our best chain.\nChain state database corruption likely.\n");
-            fLargeWorkInvalidChainFound = true;
-        }
-    }
-    else
-    {
-        fLargeWorkForkFound = false;
-        fLargeWorkInvalidChainFound = false;
-    }
-}
-
-void CheckForkWarningConditionsOnNewFork(CBlockIndex* pindexNewForkTip)
-{
-    AssertLockHeld(cs_main);
-    // If we are on a fork that is sufficiently large, set a warning flag
-    CBlockIndex* pfork = pindexNewForkTip;
-    CBlockIndex* plonger = chainActive.Tip();
-    while (pfork && pfork != plonger)
-    {
-        while (plonger && plonger->nHeight > pfork->nHeight)
-            plonger = plonger->pprev;
-        if (pfork == plonger)
-            break;
-        pfork = pfork->pprev;
-    }
-
-    // We define a condition which we should warn the user about as a fork of at least 7 blocks
-    // who's tip is within 72 blocks (+/- 12 hours if no one mines it) of ours
-    // We use 7 blocks rather arbitrarily as it represents just under 10% of sustained network
-    // hash rate operating on the fork.
-    // or a chain that is entirely longer than ours and invalid (note that this should be detected by both)
-    // We define it this way because it allows us to only store the highest fork tip (+ base) which meets
-    // the 7-block condition and from this always have the most-likely-to-cause-warning fork
-    if (pfork && (!pindexBestForkTip || (pindexBestForkTip && pindexNewForkTip->nHeight > pindexBestForkTip->nHeight)) &&
-            pindexNewForkTip->nChainWork - pfork->nChainWork > (GetBlockProof(*pfork) * 7) &&
-            chainActive.Height() - pindexNewForkTip->nHeight < 72)
-    {
-        pindexBestForkTip = pindexNewForkTip;
-        pindexBestForkBase = pfork;
-    }
-
-    CheckForkWarningConditions();
-}
-
-// Requires cs_main.
-void Misbehaving(NodeId pnode, int howmuch)
-{
-    if (howmuch == 0)
-        return;
-
-    CNodeState *state = State(pnode);
-    if (state == NULL)
-        return;
-
-    state->nMisbehavior += howmuch;
-    int banscore = GetArg("-banscore", 100);
-    if (state->nMisbehavior >= banscore && state->nMisbehavior - howmuch < banscore)
-    {
-        LogPrintf("Misbehaving: %s (%d -> %d) BAN THRESHOLD EXCEEDED\n", state->name, state->nMisbehavior-howmuch, state->nMisbehavior);
-        state->fShouldBan = true;
-    } else
-        LogPrintf("Misbehaving: %s (%d -> %d)\n", state->name, state->nMisbehavior-howmuch, state->nMisbehavior);
-}
-
-void static InvalidChainFound(CBlockIndex* pindexNew)
-{
-    if (!pindexBestInvalid || pindexNew->nChainWork > pindexBestInvalid->nChainWork)
-        pindexBestInvalid = pindexNew;
-
-    LogPrintf("InvalidChainFound: invalid block=%s  height=%d  log2_work=%.8g  date=%s\n",
-      pindexNew->GetBlockHash().ToString(), pindexNew->nHeight,
-      log(pindexNew->nChainWork.getdouble())/log(2.0), DateTimeStrFormat("%Y-%m-%d %H:%M:%S",
-      pindexNew->GetBlockTime()));
-    LogPrintf("InvalidChainFound:  current best=%s  height=%d  log2_work=%.8g  date=%s\n",
-      chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(), log(chainActive.Tip()->nChainWork.getdouble())/log(2.0),
-      DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()));
-    CheckForkWarningConditions();
-}
-
-void static InvalidBlockFound(CBlockIndex *pindex, const CValidationState &state) {
-    int nDoS = 0;
-    if (state.IsInvalid(nDoS)) {
-        std::map<uint256, NodeId>::iterator it = mapBlockSource.find(pindex->GetBlockHash());
-        if (it != mapBlockSource.end() && State(it->second)) {
-            CBlockReject reject = {state.GetRejectCode(), state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), pindex->GetBlockHash()};
-            State(it->second)->rejects.push_back(reject);
-            if (nDoS > 0)
-                Misbehaving(it->second, nDoS);
-        }
-    }
-    if (!state.CorruptionPossible()) {
-        pindex->nStatus |= BLOCK_FAILED_VALID;
-        setDirtyBlockIndex.insert(pindex);
-        setBlockIndexCandidates.erase(pindex);
-        InvalidChainFound(pindex);
-    }
-}
-
-void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight)
-{
-    // mark inputs spent
-    if (!tx.IsCoinBase()) {
-        txundo.vprevout.reserve(tx.vin.size());
-        BOOST_FOREACH(const CTxIn &txin, tx.vin) {
-            txundo.vprevout.push_back(CTxInUndo());
-            bool ret = inputs.ModifyCoins(txin.prevout.hash)->Spend(txin.prevout, txundo.vprevout.back());
-            assert(ret);
-        }
-    }
-
-    // add outputs
-    inputs.ModifyCoins(tx.GetHash())->FromTx(tx, nHeight);
-}
-
-bool CScriptCheck::operator()() {
-    const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
-    if (!VerifyScript(scriptSig, scriptPubKey, nFlags, CachingTransactionSignatureChecker(ptxTo, nIn, cacheStore), &error)) {
-        return ::error("CScriptCheck(): %s:%d VerifySignature failed: %s", ptxTo->GetHash().ToString(), nIn, ScriptErrorString(error));
-    }
-    return true;
-}
-
-bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsViewCache &inputs, bool fScriptChecks, unsigned int flags, bool cacheStore, std::vector<CScriptCheck> *pvChecks)
-{
-    if (!tx.IsCoinBase())
-    {
-        if (pvChecks)
-            pvChecks->reserve(tx.vin.size());
-
-        // This doesn't trigger the DoS code on purpose; if it did, it would make it easier
-        // for an attacker to attempt to split the network.
-        if (!inputs.HaveInputs(tx))
-            return state.Invalid(error("CheckInputs() : %s inputs unavailable", tx.GetHash().ToString()));
-
-        // While checking, GetBestBlock() refers to the parent block.
-        // This is also true for mempool checks.
-        CBlockIndex *pindexPrev = mapBlockIndex.find(inputs.GetBestBlock())->second;
-        int nSpendHeight = pindexPrev->nHeight + 1;
-        CAmount nValueIn = 0;
-        CAmount nFees = 0;
-        for (unsigned int i = 0; i < tx.vin.size(); i++)
-        {
-            const COutPoint &prevout = tx.vin[i].prevout;
-            const CCoins *coins = inputs.AccessCoins(prevout.hash);
-            assert(coins);
-
-            // If prev is coinbase, check that it's matured
-            if (coins->IsCoinBase()) {
-                if (nSpendHeight - coins->nHeight < COINBASE_MATURITY)
-                    return state.Invalid(
-                        error("CheckInputs() : tried to spend coinbase at depth %d", nSpendHeight - coins->nHeight),
-                        REJECT_INVALID, "bad-txns-premature-spend-of-coinbase");
-            }
-
-            // Check for negative or overflow input values
-            nValueIn += coins->vout[prevout.n].nValue;
-            if (!MoneyRange(coins->vout[prevout.n].nValue) || !MoneyRange(nValueIn))
-                return state.DoS(100, error("CheckInputs() : txin values out of range"),
-                                 REJECT_INVALID, "bad-txns-inputvalues-outofrange");
-
-        }
-
-        if (nValueIn < tx.GetValueOut())
-            return state.DoS(100, error("CheckInputs() : %s value in (%s) < value out (%s)",
-                                        tx.GetHash().ToString(), FormatMoney(nValueIn), FormatMoney(tx.GetValueOut())),
-                             REJECT_INVALID, "bad-txns-in-belowout");
-
-        // Tally transaction fees
-        CAmount nTxFee = nValueIn - tx.GetValueOut();
-        if (nTxFee < 0)
-            return state.DoS(100, error("CheckInputs() : %s nTxFee < 0", tx.GetHash().ToString()),
-                             REJECT_INVALID, "bad-txns-fee-negative");
-        nFees += nTxFee;
-        if (!MoneyRange(nFees))
-            return state.DoS(100, error("CheckInputs() : nFees out of range"),
-                             REJECT_INVALID, "bad-txns-fee-outofrange");
-
-        // The first loop above does all the inexpensive checks.
-        // Only if ALL inputs pass do we perform expensive ECDSA signature checks.
-        // Helps prevent CPU exhaustion attacks.
-
-        // Skip ECDSA signature verification when connecting blocks
-        // before the last block chain checkpoint. This is safe because block merkle hashes are
-        // still computed and checked, and any change will be caught at the next checkpoint.
-        if (fScriptChecks) {
-            for (unsigned int i = 0; i < tx.vin.size(); i++) {
-                const COutPoint &prevout = tx.vin[i].prevout;
-                const CCoins* coins = inputs.AccessCoins(prevout.hash);
-                assert(coins);
-
-                // Verify signature
-                CScriptCheck check(*coins, tx, i, flags, cacheStore);
-                if (pvChecks) {
-                    pvChecks->push_back(CScriptCheck());
-                    check.swap(pvChecks->back());
-                } else if (!check()) {
-                    if (flags & STANDARD_NOT_MANDATORY_VERIFY_FLAGS) {
-                        // Check whether the failure was caused by a
-                        // non-mandatory script verification check, such as
-                        // non-standard DER encodings or non-null dummy
-                        // arguments; if so, don't trigger DoS protection to
-                        // avoid splitting the network between upgraded and
-                        // non-upgraded nodes.
-                        CScriptCheck check(*coins, tx, i,
-                                flags & ~STANDARD_NOT_MANDATORY_VERIFY_FLAGS, cacheStore);
-                        if (check())
-                            return state.Invalid(false, REJECT_NONSTANDARD, strprintf("non-mandatory-script-verify-flag (%s)", ScriptErrorString(check.GetScriptError())));
-                    }
-                    // Failures of other flags indicate a transaction that is
-                    // invalid in new blocks, e.g. a invalid P2SH. We DoS ban
-                    // such nodes as they are not following the protocol. That
-                    // said during an upgrade careful thought should be taken
-                    // as to the correct behavior - we may want to continue
-                    // peering with non-upgraded nodes even after a soft-fork
-                    // super-majority vote has passed.
-                    return state.DoS(100,false, REJECT_INVALID, strprintf("mandatory-script-verify-flag-failed (%s)", ScriptErrorString(check.GetScriptError())));
-                }
-            }
-        }
-    }
-
-    return true;
-}
-
-
-
-bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& view, bool* pfClean)
-{
-    assert(pindex->GetBlockHash() == view.GetBestBlock());
-
-    if (pfClean)
-        *pfClean = false;
-
-    bool fClean = true;
-
-    CBlockUndo blockUndo;
-    CDiskBlockPos pos = pindex->GetUndoPos();
-    if (pos.IsNull())
-        return error("DisconnectBlock() : no undo data available");
-    if (!blockUndo.ReadFromDisk(pos, pindex->pprev->GetBlockHash()))
-        return error("DisconnectBlock() : failure reading undo data");
-
-    if (blockUndo.vtxundo.size() + 1 != block.vtx.size())
-        return error("DisconnectBlock() : block and undo data inconsistent");
-
-    // undo transactions in reverse order
-    for (int i = block.vtx.size() - 1; i >= 0; i--) {
-        const CTransaction &tx = block.vtx[i];
-        uint256 hash = tx.GetHash();
-
-        // Check that all outputs are available and match the outputs in the block itself
-        // exactly. Note that transactions with only provably unspendable outputs won't
-        // have outputs available even in the block itself, so we handle that case
-        // specially with outsEmpty.
-        {
-        CCoins outsEmpty;
-        CCoinsModifier outs = view.ModifyCoins(hash);
-        outs->ClearUnspendable();
-
-        CCoins outsBlock(tx, pindex->nHeight);
-        // The CCoins serialization does not serialize negative numbers.
-        // No network rules currently depend on the version here, so an inconsistency is harmless
-        // but it must be corrected before txout nversion ever influences a network rule.
-        if (outsBlock.nVersion < 0)
-            outs->nVersion = outsBlock.nVersion;
-        if (*outs != outsBlock)
-            fClean = fClean && error("DisconnectBlock() : added transaction mismatch? database corrupted");
-
-        // remove outputs
-        outs->Clear();
-        }
-
-        // restore inputs
-        if (i > 0) { // not coinbases
-            const CTxUndo &txundo = blockUndo.vtxundo[i-1];
-            if (txundo.vprevout.size() != tx.vin.size())
-                return error("DisconnectBlock() : transaction and undo data inconsistent");
-            for (unsigned int j = tx.vin.size(); j-- > 0;) {
-                const COutPoint &out = tx.vin[j].prevout;
-                const CTxInUndo &undo = txundo.vprevout[j];
-                CCoinsModifier coins = view.ModifyCoins(out.hash);
-                if (undo.nHeight != 0) {
-                    // undo data contains height: this is the last output of the prevout tx being spent
-                    if (!coins->IsPruned())
-                        fClean = fClean && error("DisconnectBlock() : undo data overwriting existing transaction");
-                    coins->Clear();
-                    coins->fCoinBase = undo.fCoinBase;
-                    coins->nHeight = undo.nHeight;
-                    coins->nVersion = undo.nVersion;
-                } else {
-                    if (coins->IsPruned())
-                        fClean = fClean && error("DisconnectBlock() : undo data adding output to missing transaction");
-                }
-                if (coins->IsAvailable(out.n))
-                    fClean = fClean && error("DisconnectBlock() : undo data overwriting existing output");
-                if (coins->vout.size() < out.n+1)
-                    coins->vout.resize(out.n+1);
-                coins->vout[out.n] = undo.txout;
-            }
-        }
-    }
-
-    // move best block pointer to prevout block
-    view.SetBestBlock(pindex->pprev->GetBlockHash());
-
-    if (pfClean) {
-        *pfClean = fClean;
-        return true;
-    } else {
-        return fClean;
-    }
-}
-
-void static FlushBlockFile(bool fFinalize = false)
-{
-    LOCK(cs_LastBlockFile);
-
-    CDiskBlockPos posOld(nLastBlockFile, 0);
-
-    FILE *fileOld = OpenBlockFile(posOld);
-    if (fileOld) {
-        if (fFinalize)
-            TruncateFile(fileOld, vinfoBlockFile[nLastBlockFile].nSize);
-        FileCommit(fileOld);
-        fclose(fileOld);
-    }
-
-    fileOld = OpenUndoFile(posOld);
-    if (fileOld) {
-        if (fFinalize)
-            TruncateFile(fileOld, vinfoBlockFile[nLastBlockFile].nUndoSize);
-        FileCommit(fileOld);
-        fclose(fileOld);
-    }
-}
-
-bool FindUndoPos(CValidationState &state, int nFile, CDiskBlockPos &pos, unsigned int nAddSize);
-
-static CCheckQueue<CScriptCheck> scriptcheckqueue(128);
-
-void ThreadScriptCheck() {
-    RenameThread("bata-scriptch");
-    scriptcheckqueue.Thread();
-}
-
-static int64_t nTimeVerify = 0;
-static int64_t nTimeConnect = 0;
-static int64_t nTimeIndex = 0;
-static int64_t nTimeCallbacks = 0;
-static int64_t nTimeTotal = 0;
-
-bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& view, bool fJustCheck)
-{
-    AssertLockHeld(cs_main);
-    // Check it again in case a previous version let a bad block in
-    if (!CheckBlock(block, state, !fJustCheck, !fJustCheck))
-        return false;
-
-    // verify that the view's current state corresponds to the previous block
-    uint256 hashPrevBlock = pindex->pprev == NULL ? uint256(0) : pindex->pprev->GetBlockHash();
-    assert(hashPrevBlock == view.GetBestBlock());
-
-    // Special case for the genesis block, skipping connection of its transactions
-    // (its coinbase is unspendable)
-    if (block.GetHash() == Params().HashGenesisBlock()) {
-        view.SetBestBlock(pindex->GetBlockHash());
-        return true;
-    }
-
-    bool fScriptChecks = pindex->nHeight >= Checkpoints::GetTotalBlocksEstimate();
-
-    // Do not allow blocks that contain transactions which 'overwrite' older transactions,
-    // unless those are already completely spent.
-    // If such overwrites are allowed, coinbases and transactions depending upon those
-    // can be duplicated to remove the ability to spend the first instance -- even after
-    // being sent to another address.
-    // See BIP30 and http://r6.ca/blog/20120206T005236Z.html for more information.
-    // This logic is not necessary for memory pool transactions, as AcceptToMemoryPool
-    // already refuses previously-known transaction ids entirely.
-    // This rule was originally applied all blocks whose timestamp was after October 1, 2012, 0:00 UTC.
-    // Now that the whole chain is irreversibly beyond that time it is applied to all blocks,
-    // this prevents exploiting the issue against nodes in their initial block download.
-    bool fEnforceBIP30 = true;
-    if (fEnforceBIP30) {
-        BOOST_FOREACH(const CTransaction& tx, block.vtx) {
-            const CCoins* coins = view.AccessCoins(tx.GetHash());
-            if (coins && !coins->IsPruned())
-                return state.DoS(100, error("ConnectBlock() : tried to overwrite transaction"),
-                                 REJECT_INVALID, "bad-txns-BIP30");
-        }
-    }
-
-    // BIP16 didn't become active until Oct 1 2012
-    int64_t nBIP16SwitchTime = 1349049600;
-    bool fStrictPayToScriptHash = (pindex->GetBlockTime() >= nBIP16SwitchTime);
-
-    unsigned int flags = fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE;
-
-    // Start enforcing the DERSIG (BIP66) rules, for block.nVersion=3 blocks,
-    // when 75% of the network has upgraded:
-    if (block.nVersion >= 3 && CBlockIndex::IsSuperMajority(3, pindex->pprev, Params().EnforceBlockUpgradeMajority())) {
-        flags |= SCRIPT_VERIFY_DERSIG;
-    }
-
-    // Start enforcing CHECKLOCKTIMEVERIFY, (BIP65) for block.nVersion=4
-    // blocks, when 75% of the network has upgraded:
-    if (block.nVersion >= 4 && CBlockIndex::IsSuperMajority(4, pindex->pprev, Params().EnforceBlockUpgradeMajority())) {
-        flags |= SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY;
-    }
-
-    CBlockUndo blockundo;
-
-    CCheckQueueControl<CScriptCheck> control(fScriptChecks && nScriptCheckThreads ? &scriptcheckqueue : NULL);
-
-    int64_t nTimeStart = GetTimeMicros();
-    CAmount nFees = 0;
-    int nInputs = 0;
-    unsigned int nSigOps = 0;
-    CDiskTxPos pos(pindex->GetBlockPos(), GetSizeOfCompactSize(block.vtx.size()));
-    std::vector<std::pair<uint256, CDiskTxPos> > vPos;
-    vPos.reserve(block.vtx.size());
-    blockundo.vtxundo.reserve(block.vtx.size() - 1);
-    for (unsigned int i = 0; i < block.vtx.size(); i++)
-    {
-        const CTransaction &tx = block.vtx[i];
-
-        nInputs += tx.vin.size();
-        nSigOps += GetLegacySigOpCount(tx);
-        if (nSigOps > MAX_BLOCK_SIGOPS)
-            return state.DoS(100, error("ConnectBlock() : too many sigops"),
-                             REJECT_INVALID, "bad-blk-sigops");
-
-        if (!tx.IsCoinBase())
-        {
-            if (!view.HaveInputs(tx))
-                return state.DoS(100, error("ConnectBlock() : inputs missing/spent"),
-                                 REJECT_INVALID, "bad-txns-inputs-missingorspent");
-
-            if (fStrictPayToScriptHash)
-            {
-                // Add in sigops done by pay-to-script-hash inputs;
-                // this is to prevent a "rogue miner" from creating
-                // an incredibly-expensive-to-validate block.
-                nSigOps += GetP2SHSigOpCount(tx, view);
-                if (nSigOps > MAX_BLOCK_SIGOPS)
-                    return state.DoS(100, error("ConnectBlock() : too many sigops"),
-                                     REJECT_INVALID, "bad-blk-sigops");
-            }
-
-            nFees += view.GetValueIn(tx)-tx.GetValueOut();
-
-            std::vector<CScriptCheck> vChecks;
-            if (!CheckInputs(tx, state, view, fScriptChecks, flags, false, nScriptCheckThreads ? &vChecks : NULL))
-                return false;
-            control.Add(vChecks);
-        }
-
-        CTxUndo undoDummy;
-        if (i > 0) {
-            blockundo.vtxundo.push_back(CTxUndo());
-        }
-        UpdateCoins(tx, state, view, i == 0 ? undoDummy : blockundo.vtxundo.back(), pindex->nHeight);
-
-        vPos.push_back(std::make_pair(tx.GetHash(), pos));
-        pos.nTxOffset += ::GetSerializeSize(tx, SER_DISK, CLIENT_VERSION);
-    }
-    int64_t nTime1 = GetTimeMicros(); nTimeConnect += nTime1 - nTimeStart;
-    LogPrint("bench", "      - Connect %u transactions: %.2fms (%.3fms/tx, %.3fms/txin) [%.2fs]\n", (unsigned)block.vtx.size(), 0.001 * (nTime1 - nTimeStart), 0.001 * (nTime1 - nTimeStart) / block.vtx.size(), nInputs <= 1 ? 0 : 0.001 * (nTime1 - nTimeStart) / (nInputs-1), nTimeConnect * 0.000001);
-
-    if (block.vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
-        return state.DoS(100,
-                         error("ConnectBlock() : coinbase pays too much (actual=%d vs limit=%d)",
-                               block.vtx[0].GetValueOut(), GetBlockValue(pindex->nHeight, nFees)),
-                               REJECT_INVALID, "bad-cb-amount");
-
-    if (!control.Wait())
-        return state.DoS(100, false);
-    int64_t nTime2 = GetTimeMicros(); nTimeVerify += nTime2 - nTimeStart;
-    LogPrint("bench", "    - Verify %u txins: %.2fms (%.3fms/txin) [%.2fs]\n", nInputs - 1, 0.001 * (nTime2 - nTimeStart), nInputs <= 1 ? 0 : 0.001 * (nTime2 - nTimeStart) / (nInputs-1), nTimeVerify * 0.000001);
-
-    if (fJustCheck)
-        return true;
-
-    // Write undo information to disk
-    if (pindex->GetUndoPos().IsNull() || !pindex->IsValid(BLOCK_VALID_SCRIPTS))
-    {
-        if (pindex->GetUndoPos().IsNull()) {
-            CDiskBlockPos pos;
-            if (!FindUndoPos(state, pindex->nFile, pos, ::GetSerializeSize(blockundo, SER_DISK, CLIENT_VERSION) + 40))
-                return error("ConnectBlock() : FindUndoPos failed");
-            if (!blockundo.WriteToDisk(pos, pindex->pprev->GetBlockHash()))
-                return state.Abort("Failed to write undo data");
-
-            // update nUndoPos in block index
-            pindex->nUndoPos = pos.nPos;
-            pindex->nStatus |= BLOCK_HAVE_UNDO;
-        }
-
-        pindex->RaiseValidity(BLOCK_VALID_SCRIPTS);
-        setDirtyBlockIndex.insert(pindex);
-    }
-
-    if (fTxIndex)
-        if (!pblocktree->WriteTxIndex(vPos))
-            return state.Abort("Failed to write transaction index");
-
-    // add this block to the view's block chain
-    view.SetBestBlock(pindex->GetBlockHash());
-
-    int64_t nTime3 = GetTimeMicros(); nTimeIndex += nTime3 - nTime2;
-    LogPrint("bench", "    - Index writing: %.2fms [%.2fs]\n", 0.001 * (nTime3 - nTime2), nTimeIndex * 0.000001);
-
-    // Watch for changes to the previous coinbase transaction.
-    static uint256 hashPrevBestCoinBase;
-    g_signals.UpdatedTransaction(hashPrevBestCoinBase);
-    hashPrevBestCoinBase = block.vtx[0].GetHash();
-
-    int64_t nTime4 = GetTimeMicros(); nTimeCallbacks += nTime4 - nTime3;
-    LogPrint("bench", "    - Callbacks: %.2fms [%.2fs]\n", 0.001 * (nTime4 - nTime3), nTimeCallbacks * 0.000001);
-
-    return true;
-}
-
-enum FlushStateMode {
-    FLUSH_STATE_IF_NEEDED,
-    FLUSH_STATE_PERIODIC,
-    FLUSH_STATE_ALWAYS
-};
-
-/**
- * Update the on-disk chain state.
- * The caches and indexes are flushed if either they're too large, forceWrite is set, or
- * fast is not set and it's been a while since the last write.
- */
-bool static FlushStateToDisk(CValidationState &state, FlushStateMode mode) {
-    LOCK(cs_main);
-    static int64_t nLastWrite = 0;
-    try {
-    if ((mode == FLUSH_STATE_ALWAYS) ||
-        ((mode == FLUSH_STATE_PERIODIC || mode == FLUSH_STATE_IF_NEEDED) && pcoinsTip->GetCacheSize() > nCoinCacheSize) ||
-        (mode == FLUSH_STATE_PERIODIC && GetTimeMicros() > nLastWrite + DATABASE_WRITE_INTERVAL * 1000000)) {
-        // Typical CCoins structures on disk are around 100 bytes in size.
-        // Pushing a new one to the database can cause it to be written
-        // twice (once in the log, and once in the tables). This is already
-        // an overestimation, as most will delete an existing entry or
-        // overwrite one. Still, use a conservative safety factor of 2.
-        if (!CheckDiskSpace(100 * 2 * 2 * pcoinsTip->GetCacheSize()))
-            return state.Error("out of disk space");
-        // First make sure all block and undo data is flushed to disk.
-        FlushBlockFile();
-        // Then update all block file information (which may refer to block and undo files).
-        bool fileschanged = false;
-        for (set<int>::iterator it = setDirtyFileInfo.begin(); it != setDirtyFileInfo.end(); ) {
-            if (!pblocktree->WriteBlockFileInfo(*it, vinfoBlockFile[*it])) {
-                return state.Abort("Failed to write to block index");
-            }
-            fileschanged = true;
-            setDirtyFileInfo.erase(it++);
-        }
-        if (fileschanged && !pblocktree->WriteLastBlockFile(nLastBlockFile)) {
-            return state.Abort("Failed to write to block index");
-        }
-        for (set<CBlockIndex*>::iterator it = setDirtyBlockIndex.begin(); it != setDirtyBlockIndex.end(); ) {
-             if (!pblocktree->WriteBlockIndex(CDiskBlockIndex(*it))) {
-                 return state.Abort("Failed to write to block index");
-             }
-             setDirtyBlockIndex.erase(it++);
-        }
-        pblocktree->Sync();
-        // Finally flush the chainstate (which may refer to block index entries).
-        if (!pcoinsTip->Flush())
-            return state.Abort("Failed to write to coin database");
-        // Update best block in wallet (so we can detect restored wallets).
-        if (mode != FLUSH_STATE_IF_NEEDED) {
-            g_signals.SetBestChain(chainActive.GetLocator());
-        }
-        nLastWrite = GetTimeMicros();
-    }
-    } catch (const std::runtime_error& e) {
-        return state.Abort(std::string("System error while flushing: ") + e.what());
-    }
-    return true;
-}
-
-void FlushStateToDisk() {
-    CValidationState state;
-    FlushStateToDisk(state, FLUSH_STATE_ALWAYS);
-}
-
-/** Update chainActive and related internal data structures. */
-void static UpdateTip(CBlockIndex *pindexNew) {
-    chainActive.SetTip(pindexNew);
-
-    // New best block
-    nTimeBestReceived = GetTime();
-    mempool.AddTransactionsUpdated(1);
-
-    LogPrintf("UpdateTip: new best=%s  height=%d  log2_work=%.8g  tx=%lu  date=%s progress=%f  cache=%u\n",
-      chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(), log(chainActive.Tip()->nChainWork.getdouble())/log(2.0), (unsigned long)chainActive.Tip()->nChainTx,
-      DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()),
-      Checkpoints::GuessVerificationProgress(chainActive.Tip()), (unsigned int)pcoinsTip->GetCacheSize());
-
-    cvBlockChange.notify_all();
-
-    // Check the version of the last 100 blocks to see if we need to upgrade:
-    static bool fWarned = false;
-    if (!IsInitialBlockDownload() && !fWarned)
-    {
-        int nUpgraded = 0;
-        const CBlockIndex* pindex = chainActive.Tip();
-        for (int i = 0; i < 100 && pindex != NULL; i++)
-        {
-            if (pindex->nVersion > CBlock::CURRENT_VERSION)
-                ++nUpgraded;
-            pindex = pindex->pprev;
-        }
-        if (nUpgraded > 0)
-            LogPrintf("SetBestChain: %d of last 100 blocks above version %d\n", nUpgraded, (int)CBlock::CURRENT_VERSION);
-        if (nUpgraded > 100/2)
-        {
-            // strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
-            strMiscWarning = _("Warning: This version is obsolete, upgrade required!");
-            CAlert::Notify(strMiscWarning, true);
-            fWarned = true;
-        }
-    }
-}
-
-/** Disconnect chainActive's tip. */
-bool static DisconnectTip(CValidationState &state) {
-    CBlockIndex *pindexDelete = chainActive.Tip();
-    assert(pindexDelete);
-    mempool.check(pcoinsTip);
-    // Read block from disk.
-    CBlock block;
-    if (!ReadBlockFromDisk(block, pindexDelete))
-        return state.Abort("Failed to read block");
-    // Apply the block atomically to the chain state.
-    int64_t nStart = GetTimeMicros();
-    {
-        CCoinsViewCache view(pcoinsTip);
-        if (!DisconnectBlock(block, state, pindexDelete, view))
-            return error("DisconnectTip() : DisconnectBlock %s failed", pindexDelete->GetBlockHash().ToString());
-        assert(view.Flush());
-    }
-    LogPrint("bench", "- Disconnect block: %.2fms\n", (GetTimeMicros() - nStart) * 0.001);
-    // Write the chain state to disk, if necessary.
-    if (!FlushStateToDisk(state, FLUSH_STATE_IF_NEEDED))
-        return false;
-    // Resurrect mempool transactions from the disconnected block.
-    BOOST_FOREACH(const CTransaction &tx, block.vtx) {
-        // ignore validation errors in resurrected transactions
-        list<CTransaction> removed;
-        CValidationState stateDummy;
-        if (tx.IsCoinBase() || !AcceptToMemoryPool(mempool, stateDummy, tx, false, NULL))
-            mempool.remove(tx, removed, true);
-    }
-    mempool.removeCoinbaseSpends(pcoinsTip, pindexDelete->nHeight);
-    mempool.check(pcoinsTip);
-    // Update chainActive and related variables.
-    UpdateTip(pindexDelete->pprev);
-    // Let wallets know transactions went from 1-confirmed to
-    // 0-confirmed or conflicted:
-    BOOST_FOREACH(const CTransaction &tx, block.vtx) {
-        SyncWithWallets(tx, NULL);
-    }
-    return true;
-}
-
-static int64_t nTimeReadFromDisk = 0;
-static int64_t nTimeConnectTotal = 0;
-static int64_t nTimeFlush = 0;
-static int64_t nTimeChainState = 0;
-static int64_t nTimePostConnect = 0;
-
-/**
- * Connect a new block to chainActive. pblock is either NULL or a pointer to a CBlock
- * corresponding to pindexNew, to bypass loading it again from disk.
- */
-bool static ConnectTip(CValidationState &state, CBlockIndex *pindexNew, CBlock *pblock) {
-    assert(pindexNew->pprev == chainActive.Tip());
-    mempool.check(pcoinsTip);
-    // Read block from disk.
-    int64_t nTime1 = GetTimeMicros();
-    CBlock block;
-    if (!pblock) {
-        if (!ReadBlockFromDisk(block, pindexNew))
-            return state.Abort("Failed to read block");
-        pblock = █
-    }
-    // Apply the block atomically to the chain state.
-    int64_t nTime2 = GetTimeMicros(); nTimeReadFromDisk += nTime2 - nTime1;
-    int64_t nTime3;
-    LogPrint("bench", "  - Load block from disk: %.2fms [%.2fs]\n", (nTime2 - nTime1) * 0.001, nTimeReadFromDisk * 0.000001);
-    {
-        CCoinsViewCache view(pcoinsTip);
-        CInv inv(MSG_BLOCK, pindexNew->GetBlockHash());
-        bool rv = ConnectBlock(*pblock, state, pindexNew, view);
-        g_signals.BlockChecked(*pblock, state);
-        if (!rv) {
-            if (state.IsInvalid())
-                InvalidBlockFound(pindexNew, state);
-            return error("ConnectTip() : ConnectBlock %s failed", pindexNew->GetBlockHash().ToString());
-        }
-        mapBlockSource.erase(inv.hash);
-        nTime3 = GetTimeMicros(); nTimeConnectTotal += nTime3 - nTime2;
-        LogPrint("bench", "  - Connect total: %.2fms [%.2fs]\n", (nTime3 - nTime2) * 0.001, nTimeConnectTotal * 0.000001);
-        assert(view.Flush());
-    }
-    int64_t nTime4 = GetTimeMicros(); nTimeFlush += nTime4 - nTime3;
-    LogPrint("bench", "  - Flush: %.2fms [%.2fs]\n", (nTime4 - nTime3) * 0.001, nTimeFlush * 0.000001);
-    // Write the chain state to disk, if necessary.
-    if (!FlushStateToDisk(state, FLUSH_STATE_IF_NEEDED))
-        return false;
-    int64_t nTime5 = GetTimeMicros(); nTimeChainState += nTime5 - nTime4;
-    LogPrint("bench", "  - Writing chainstate: %.2fms [%.2fs]\n", (nTime5 - nTime4) * 0.001, nTimeChainState * 0.000001);
-    // Remove conflicting transactions from the mempool.
-    list<CTransaction> txConflicted;
-    mempool.removeForBlock(pblock->vtx, pindexNew->nHeight, txConflicted);
-    mempool.check(pcoinsTip);
-    // Update chainActive & related variables.
-    UpdateTip(pindexNew);
-    // Tell wallet about transactions that went from mempool
-    // to conflicted:
-    BOOST_FOREACH(const CTransaction &tx, txConflicted) {
-        SyncWithWallets(tx, NULL);
-    }
-    // ... and about transactions that got confirmed:
-    BOOST_FOREACH(const CTransaction &tx, pblock->vtx) {
-        SyncWithWallets(tx, pblock);
-    }
-
-    int64_t nTime6 = GetTimeMicros(); nTimePostConnect += nTime6 - nTime5; nTimeTotal += nTime6 - nTime1;
-    LogPrint("bench", "  - Connect postprocess: %.2fms [%.2fs]\n", (nTime6 - nTime5) * 0.001, nTimePostConnect * 0.000001);
-    LogPrint("bench", "- Connect block: %.2fms [%.2fs]\n", (nTime6 - nTime1) * 0.001, nTimeTotal * 0.000001);
-    return true;
-}
-
-/**
- * Return the tip of the chain with the most work in it, that isn't
- * known to be invalid (it's however far from certain to be valid).
- */
-static CBlockIndex* FindMostWorkChain() {
-    do {
-        CBlockIndex *pindexNew = NULL;
-
-        // Find the best candidate header.
-        {
-            std::set<CBlockIndex*, CBlockIndexWorkComparator>::reverse_iterator it = setBlockIndexCandidates.rbegin();
-            if (it == setBlockIndexCandidates.rend())
-                return NULL;
-            pindexNew = *it;
-        }
-
-        // Check whether all blocks on the path between the currently active chain and the candidate are valid.
-        // Just going until the active chain is an optimization, as we know all blocks in it are valid already.
-        CBlockIndex *pindexTest = pindexNew;
-        bool fInvalidAncestor = false;
-        while (pindexTest && !chainActive.Contains(pindexTest)) {
-            assert(pindexTest->nStatus & BLOCK_HAVE_DATA);
-            assert(pindexTest->nChainTx || pindexTest->nHeight == 0);
-            if (pindexTest->nStatus & BLOCK_FAILED_MASK) {
-                // Candidate has an invalid ancestor, remove entire chain from the set.
-                if (pindexBestInvalid == NULL || pindexNew->nChainWork > pindexBestInvalid->nChainWork)
-                    pindexBestInvalid = pindexNew;
-                CBlockIndex *pindexFailed = pindexNew;
-                while (pindexTest != pindexFailed) {
-                    pindexFailed->nStatus |= BLOCK_FAILED_CHILD;
-                    setBlockIndexCandidates.erase(pindexFailed);
-                    pindexFailed = pindexFailed->pprev;
-                }
-                setBlockIndexCandidates.erase(pindexTest);
-                fInvalidAncestor = true;
-                break;
-            }
-            pindexTest = pindexTest->pprev;
-        }
-        if (!fInvalidAncestor)
-            return pindexNew;
-    } while(true);
-}
-
-/** Delete all entries in setBlockIndexCandidates that are worse than the current tip. */
-static void PruneBlockIndexCandidates() {
-    // Note that we can't delete the current block itself, as we may need to return to it later in case a
-    // reorganization to a better block fails.
-    std::set<CBlockIndex*, CBlockIndexWorkComparator>::iterator it = setBlockIndexCandidates.begin();
-    while (it != setBlockIndexCandidates.end() && setBlockIndexCandidates.value_comp()(*it, chainActive.Tip())) {
-        setBlockIndexCandidates.erase(it++);
-    }
-    // Either the current tip or a successor of it we're working towards is left in setBlockIndexCandidates.
-    assert(!setBlockIndexCandidates.empty());
-}
-
-/**
- * Try to make some progress towards making pindexMostWork the active block.
- * pblock is either NULL or a pointer to a CBlock corresponding to pindexMostWork.
- */
-static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMostWork, CBlock *pblock) {
-    AssertLockHeld(cs_main);
-    bool fInvalidFound = false;
-    const CBlockIndex *pindexOldTip = chainActive.Tip();
-    const CBlockIndex *pindexFork = chainActive.FindFork(pindexMostWork);
-
-    // Disconnect active blocks which are no longer in the best chain.
-    while (chainActive.Tip() && chainActive.Tip() != pindexFork) {
-        if (!DisconnectTip(state))
-            return false;
-    }
-
-    // Build list of new blocks to connect.
-    std::vector<CBlockIndex*> vpindexToConnect;
-    bool fContinue = true;
-    int nHeight = pindexFork ? pindexFork->nHeight : -1;
-    while (fContinue && nHeight != pindexMostWork->nHeight) {
-    // Don't iterate the entire list of potential improvements toward the best tip, as we likely only need
-    // a few blocks along the way.
-    int nTargetHeight = std::min(nHeight + 32, pindexMostWork->nHeight);
-    vpindexToConnect.clear();
-    vpindexToConnect.reserve(nTargetHeight - nHeight);
-    CBlockIndex *pindexIter = pindexMostWork->GetAncestor(nTargetHeight);
-    while (pindexIter && pindexIter->nHeight != nHeight) {
-        vpindexToConnect.push_back(pindexIter);
-        pindexIter = pindexIter->pprev;
-    }
-    nHeight = nTargetHeight;
-
-    // Connect new blocks.
-    BOOST_REVERSE_FOREACH(CBlockIndex *pindexConnect, vpindexToConnect) {
-        if (!ConnectTip(state, pindexConnect, pindexConnect == pindexMostWork ? pblock : NULL)) {
-            if (state.IsInvalid()) {
-                // The block violates a consensus rule.
-                if (!state.CorruptionPossible())
-                    InvalidChainFound(vpindexToConnect.back());
-                state = CValidationState();
-                fInvalidFound = true;
-                fContinue = false;
-                break;
-            } else {
-                // A system error occurred (disk space, database error, ...).
-                return false;
-            }
-        } else {
-            PruneBlockIndexCandidates();
-            if (!pindexOldTip || chainActive.Tip()->nChainWork > pindexOldTip->nChainWork) {
-                // We're in a better position than we were. Return temporarily to release the lock.
-                fContinue = false;
-                break;
-            }
-        }
-    }
-    }
-
-    // Callbacks/notifications for a new best chain.
-    if (fInvalidFound)
-        CheckForkWarningConditionsOnNewFork(vpindexToConnect.back());
-    else
-        CheckForkWarningConditions();
-
-    return true;
-}
-
-/**
- * Make the best chain active, in multiple steps. The result is either failure
- * or an activated best chain. pblock is either NULL or a pointer to a block
- * that is already loaded (to avoid loading it again from disk).
- */
-bool ActivateBestChain(CValidationState &state, CBlock *pblock) {
-    CBlockIndex *pindexNewTip = NULL;
-    CBlockIndex *pindexMostWork = NULL;
-    do {
-        boost::this_thread::interruption_point();
-
-        bool fInitialDownload;
-        {
-            LOCK(cs_main);
-            pindexMostWork = FindMostWorkChain();
-
-            // Whether we have anything to do at all.
-            if (pindexMostWork == NULL || pindexMostWork == chainActive.Tip())
-                return true;
-
-            if (!ActivateBestChainStep(state, pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : NULL))
-                return false;
-
-            pindexNewTip = chainActive.Tip();
-            fInitialDownload = IsInitialBlockDownload();
-        }
-        // When we reach this point, we switched to a new tip (stored in pindexNewTip).
-
-        // Notifications/callbacks that can run without cs_main
-        if (!fInitialDownload) {
-            uint256 hashNewTip = pindexNewTip->GetBlockHash();
-            // Relay inventory, but don't relay old inventory during initial block download.
-            int nBlockEstimate = Checkpoints::GetTotalBlocksEstimate();
-            {
-                LOCK(cs_vNodes);
-                BOOST_FOREACH(CNode* pnode, vNodes)
-                    if (chainActive.Height() > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : nBlockEstimate))
-                        pnode->PushInventory(CInv(MSG_BLOCK, hashNewTip));
-            }
-            // Notify external listeners about the new tip.
-            uiInterface.NotifyBlockTip(hashNewTip);
-        }
-    } while(pindexMostWork != chainActive.Tip());
-    CheckBlockIndex();
-
-    // Write changes periodically to disk, after relay.
-    if (!FlushStateToDisk(state, FLUSH_STATE_PERIODIC)) {
-        return false;
-    }
-
-    return true;
-}
-
-bool InvalidateBlock(CValidationState& state, CBlockIndex *pindex) {
-    AssertLockHeld(cs_main);
-
-    // Mark the block itself as invalid.
-    pindex->nStatus |= BLOCK_FAILED_VALID;
-    setDirtyBlockIndex.insert(pindex);
-    setBlockIndexCandidates.erase(pindex);
-
-    while (chainActive.Contains(pindex)) {
-        CBlockIndex *pindexWalk = chainActive.Tip();
-        pindexWalk->nStatus |= BLOCK_FAILED_CHILD;
-        setDirtyBlockIndex.insert(pindexWalk);
-        setBlockIndexCandidates.erase(pindexWalk);
-        // ActivateBestChain considers blocks already in chainActive
-        // unconditionally valid already, so force disconnect away from it.
-        if (!DisconnectTip(state)) {
-            return false;
-        }
-    }
-
-    // The resulting new best tip may not be in setBlockIndexCandidates anymore, so
-    // add them again.
-    BlockMap::iterator it = mapBlockIndex.begin();
-    while (it != mapBlockIndex.end()) {
-        if (it->second->IsValid(BLOCK_VALID_TRANSACTIONS) && it->second->nChainTx && !setBlockIndexCandidates.value_comp()(it->second, chainActive.Tip())) {
-            setBlockIndexCandidates.insert(it->second);
-        }
-        it++;
-    }
-
-    InvalidChainFound(pindex);
-    return true;
-}
-
-bool ReconsiderBlock(CValidationState& state, CBlockIndex *pindex) {
-    AssertLockHeld(cs_main);
-
-    int nHeight = pindex->nHeight;
-
-    // Remove the invalidity flag from this block and all its descendants.
-    BlockMap::iterator it = mapBlockIndex.begin();
-    while (it != mapBlockIndex.end()) {
-        if (!it->second->IsValid() && it->second->GetAncestor(nHeight) == pindex) {
-            it->second->nStatus &= ~BLOCK_FAILED_MASK;
-            setDirtyBlockIndex.insert(it->second);
-            if (it->second->IsValid(BLOCK_VALID_TRANSACTIONS) && it->second->nChainTx && setBlockIndexCandidates.value_comp()(chainActive.Tip(), it->second)) {
-                setBlockIndexCandidates.insert(it->second);
-            }
-            if (it->second == pindexBestInvalid) {
-                // Reset invalid block marker if it was pointing to one of those.
-                pindexBestInvalid = NULL;
-            }
-        }
-        it++;
-    }
-
-    // Remove the invalidity flag from all ancestors too.
-    while (pindex != NULL) {
-        if (pindex->nStatus & BLOCK_FAILED_MASK) {
-            pindex->nStatus &= ~BLOCK_FAILED_MASK;
-            setDirtyBlockIndex.insert(pindex);
-        }
-        pindex = pindex->pprev;
-    }
-    return true;
-}
-
-CBlockIndex* AddToBlockIndex(const CBlockHeader& block)
-{
-    // Check for duplicate
-    uint256 hash = block.GetHash();
-    BlockMap::iterator it = mapBlockIndex.find(hash);
-    if (it != mapBlockIndex.end())
-        return it->second;
-
-    // Construct new block index object
-    CBlockIndex* pindexNew = new CBlockIndex(block);
-    assert(pindexNew);
-    // We assign the sequence id to blocks only when the full data is available,
-    // to avoid miners withholding blocks but broadcasting headers, to get a
-    // competitive advantage.
-    pindexNew->nSequenceId = 0;
-    BlockMap::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
-    pindexNew->phashBlock = &((*mi).first);
-    BlockMap::iterator miPrev = mapBlockIndex.find(block.hashPrevBlock);
-    if (miPrev != mapBlockIndex.end())
-    {
-        pindexNew->pprev = (*miPrev).second;
-        pindexNew->nHeight = pindexNew->pprev->nHeight + 1;
-        pindexNew->BuildSkip();
-    }
-    pindexNew->nChainWork = (pindexNew->pprev ? pindexNew->pprev->nChainWork : 0) + GetBlockProof(*pindexNew);
-    pindexNew->RaiseValidity(BLOCK_VALID_TREE);
-    if (pindexBestHeader == NULL || pindexBestHeader->nChainWork < pindexNew->nChainWork)
-        pindexBestHeader = pindexNew;
-
-    setDirtyBlockIndex.insert(pindexNew);
-
-    return pindexNew;
-}
-
-/** Mark a block as having its data received and checked (up to BLOCK_VALID_TRANSACTIONS). */
-bool ReceivedBlockTransactions(const CBlock &block, CValidationState& state, CBlockIndex *pindexNew, const CDiskBlockPos& pos)
-{
-    pindexNew->nTx = block.vtx.size();
-    pindexNew->nChainTx = 0;
-    pindexNew->nFile = pos.nFile;
-    pindexNew->nDataPos = pos.nPos;
-    pindexNew->nUndoPos = 0;
-    pindexNew->nStatus |= BLOCK_HAVE_DATA;
-    pindexNew->RaiseValidity(BLOCK_VALID_TRANSACTIONS);
-    setDirtyBlockIndex.insert(pindexNew);
-
-    if (pindexNew->pprev == NULL || pindexNew->pprev->nChainTx) {
-        // If pindexNew is the genesis block or all parents are BLOCK_VALID_TRANSACTIONS.
-        deque<CBlockIndex*> queue;
-        queue.push_back(pindexNew);
-
-        // Recursively process any descendant blocks that now may be eligible to be connected.
-        while (!queue.empty()) {
-            CBlockIndex *pindex = queue.front();
-            queue.pop_front();
-            pindex->nChainTx = (pindex->pprev ? pindex->pprev->nChainTx : 0) + pindex->nTx;
-            {
-                LOCK(cs_nBlockSequenceId);
-                pindex->nSequenceId = nBlockSequenceId++;
-            }
-            if (chainActive.Tip() == NULL || !setBlockIndexCandidates.value_comp()(pindex, chainActive.Tip())) {
-                setBlockIndexCandidates.insert(pindex);
-            }
-            std::pair<std::multimap<CBlockIndex*, CBlockIndex*>::iterator, std::multimap<CBlockIndex*, CBlockIndex*>::iterator> range = mapBlocksUnlinked.equal_range(pindex);
-            while (range.first != range.second) {
-                std::multimap<CBlockIndex*, CBlockIndex*>::iterator it = range.first;
-                queue.push_back(it->second);
-                range.first++;
-                mapBlocksUnlinked.erase(it);
-            }
-        }
-    } else {
-        if (pindexNew->pprev && pindexNew->pprev->IsValid(BLOCK_VALID_TREE)) {
-            mapBlocksUnlinked.insert(std::make_pair(pindexNew->pprev, pindexNew));
-        }
-    }
-
-    return true;
-}
-
-bool FindBlockPos(CValidationState &state, CDiskBlockPos &pos, unsigned int nAddSize, unsigned int nHeight, uint64_t nTime, bool fKnown = false)
-{
-    LOCK(cs_LastBlockFile);
-
-    unsigned int nFile = fKnown ? pos.nFile : nLastBlockFile;
-    if (vinfoBlockFile.size() <= nFile) {
-        vinfoBlockFile.resize(nFile + 1);
-    }
-
-    if (!fKnown) {
-        while (vinfoBlockFile[nFile].nSize + nAddSize >= MAX_BLOCKFILE_SIZE) {
-            LogPrintf("Leaving block file %i: %s\n", nFile, vinfoBlockFile[nFile].ToString());
-            FlushBlockFile(true);
-            nFile++;
-            if (vinfoBlockFile.size() <= nFile) {
-                vinfoBlockFile.resize(nFile + 1);
-            }
-        }
-        pos.nFile = nFile;
-        pos.nPos = vinfoBlockFile[nFile].nSize;
-    }
-
-    nLastBlockFile = nFile;
-    vinfoBlockFile[nFile].AddBlock(nHeight, nTime);
-    if (fKnown)
-        vinfoBlockFile[nFile].nSize = std::max(pos.nPos + nAddSize, vinfoBlockFile[nFile].nSize);
-    else
-        vinfoBlockFile[nFile].nSize += nAddSize;
-
-    if (!fKnown) {
-        unsigned int nOldChunks = (pos.nPos + BLOCKFILE_CHUNK_SIZE - 1) / BLOCKFILE_CHUNK_SIZE;
-        unsigned int nNewChunks = (vinfoBlockFile[nFile].nSize + BLOCKFILE_CHUNK_SIZE - 1) / BLOCKFILE_CHUNK_SIZE;
-        if (nNewChunks > nOldChunks) {
-            if (CheckDiskSpace(nNewChunks * BLOCKFILE_CHUNK_SIZE - pos.nPos)) {
-                FILE *file = OpenBlockFile(pos);
-                if (file) {
-                    LogPrintf("Pre-allocating up to position 0x%x in blk%05u.dat\n", nNewChunks * BLOCKFILE_CHUNK_SIZE, pos.nFile);
-                    AllocateFileRange(file, pos.nPos, nNewChunks * BLOCKFILE_CHUNK_SIZE - pos.nPos);
-                    fclose(file);
-                }
-            }
-            else
-                return state.Error("out of disk space");
-        }
-    }
-
-    setDirtyFileInfo.insert(nFile);
-    return true;
-}
-
-bool FindUndoPos(CValidationState &state, int nFile, CDiskBlockPos &pos, unsigned int nAddSize)
-{
-    pos.nFile = nFile;
-
-    LOCK(cs_LastBlockFile);
-
-    unsigned int nNewSize;
-    pos.nPos = vinfoBlockFile[nFile].nUndoSize;
-    nNewSize = vinfoBlockFile[nFile].nUndoSize += nAddSize;
-    setDirtyFileInfo.insert(nFile);
-
-    unsigned int nOldChunks = (pos.nPos + UNDOFILE_CHUNK_SIZE - 1) / UNDOFILE_CHUNK_SIZE;
-    unsigned int nNewChunks = (nNewSize + UNDOFILE_CHUNK_SIZE - 1) / UNDOFILE_CHUNK_SIZE;
-    if (nNewChunks > nOldChunks) {
-        if (CheckDiskSpace(nNewChunks * UNDOFILE_CHUNK_SIZE - pos.nPos)) {
-            FILE *file = OpenUndoFile(pos);
-            if (file) {
-                LogPrintf("Pre-allocating up to position 0x%x in rev%05u.dat\n", nNewChunks * UNDOFILE_CHUNK_SIZE, pos.nFile);
-                AllocateFileRange(file, pos.nPos, nNewChunks * UNDOFILE_CHUNK_SIZE - pos.nPos);
-                fclose(file);
-            }
-        }
-        else
-            return state.Error("out of disk space");
-    }
-
-    return true;
-}
-
-bool CheckBlockHeader(const CBlockHeader& block, CValidationState& state, bool fCheckPOW)
-{
-    // Check proof of work matches claimed amount
-    if (fCheckPOW && !CheckProofOfWork(block.GetPoWHash(), block.nBits))
-        return state.DoS(50, error("CheckBlockHeader() : proof of work failed"),
-                         REJECT_INVALID, "high-hash");
-
-    // Check timestamp
-    if (block.GetBlockTime() > GetAdjustedTime() + 2 * 60 * 60)
-        return state.Invalid(error("CheckBlockHeader() : block timestamp too far in the future"),
-                             REJECT_INVALID, "time-too-new");
-
-    return true;
-}
-
-bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bool fCheckMerkleRoot)
-{
-    // These are checks that are independent of context.
-
-    // Check that the header is valid (particularly PoW).  This is mostly
-    // redundant with the call in AcceptBlockHeader.
-    if (!CheckBlockHeader(block, state, fCheckPOW))
-        return false;
-
-    // Check the merkle root.
-    if (fCheckMerkleRoot) {
-        bool mutated;
-        uint256 hashMerkleRoot2 = block.BuildMerkleTree(&mutated);
-        if (block.hashMerkleRoot != hashMerkleRoot2)
-            return state.DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"),
-                             REJECT_INVALID, "bad-txnmrklroot", true);
-
-        // Check for merkle tree malleability (CVE-2012-2459): repeating sequences
-        // of transactions in a block without affecting the merkle root of a block,
-        // while still invalidating it.
-        if (mutated)
-            return state.DoS(100, error("CheckBlock() : duplicate transaction"),
-                             REJECT_INVALID, "bad-txns-duplicate", true);
-    }
-
-    // All potential-corruption validation must be done before we do any
-    // transaction validation, as otherwise we may mark the header as invalid
-    // because we receive the wrong transactions for it.
-
-    // Size limits
-    if (block.vtx.empty() || block.vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
-        return state.DoS(100, error("CheckBlock() : size limits failed"),
-                         REJECT_INVALID, "bad-blk-length");
-
-    // First transaction must be coinbase, the rest must not be
-    if (block.vtx.empty() || !block.vtx[0].IsCoinBase())
-        return state.DoS(100, error("CheckBlock() : first tx is not coinbase"),
-                         REJECT_INVALID, "bad-cb-missing");
-    for (unsigned int i = 1; i < block.vtx.size(); i++)
-        if (block.vtx[i].IsCoinBase())
-            return state.DoS(100, error("CheckBlock() : more than one coinbase"),
-                             REJECT_INVALID, "bad-cb-multiple");
-
-    // Check transactions
-    BOOST_FOREACH(const CTransaction& tx, block.vtx)
-        if (!CheckTransaction(tx, state))
-            return error("CheckBlock() : CheckTransaction failed");
-
-    unsigned int nSigOps = 0;
-    BOOST_FOREACH(const CTransaction& tx, block.vtx)
-    {
-        nSigOps += GetLegacySigOpCount(tx);
-    }
-    if (nSigOps > MAX_BLOCK_SIGOPS)
-        return state.DoS(100, error("CheckBlock() : out-of-bounds SigOpCount"),
-                         REJECT_INVALID, "bad-blk-sigops", true);
-
-    return true;
-}
-
-bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex * const pindexPrev)
-{
-    uint256 hash = block.GetHash();
-    if (hash == Params().HashGenesisBlock())
-        return true;
-
-    assert(pindexPrev);
-
-    int nHeight = pindexPrev->nHeight+1;
-
-    // Check proof of work
-    if ((!Params().SkipProofOfWorkCheck()) &&
-       (block.nBits != GetNextWorkRequired(pindexPrev, &block)))
-        return state.DoS(100, error("%s : incorrect proof of work", __func__),
-                         REJECT_INVALID, "bad-diffbits");
-
-    // Check timestamp against prev
-    if (block.GetBlockTime() <= pindexPrev->GetMedianTimePast())
-        return state.Invalid(error("%s : block's timestamp is too early", __func__),
-                             REJECT_INVALID, "time-too-old");
-
-    // Check that the block chain matches the known block chain up to a checkpoint
-    if (!Checkpoints::CheckBlock(nHeight, hash))
-        return state.DoS(100, error("%s : rejected by checkpoint lock-in at %d", __func__, nHeight),
-                         REJECT_CHECKPOINT, "checkpoint mismatch");
-
-    // Don't accept any forks from the main chain prior to last checkpoint
-    CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint();
-    if (pcheckpoint && nHeight < pcheckpoint->nHeight)
-        return state.DoS(100, error("%s : forked chain older than last checkpoint (height %d)", __func__, nHeight));
-
-    // Bata: Reject block.nVersion=1 blocks (mainnet >= 500000, testnet >= 100000, regtest uses supermajority)
-    bool enforceV2 = false;
-    if (block.nVersion < 2)
-    {
-        if (Params().EnforceV2AfterHeight() != -1)
-        {
-            // Mainnet 500k, Testnet 100k
-            if (nHeight >= Params().EnforceV2AfterHeight())
-                enforceV2 = true;
-        }
-        else
-        {
-            // Regtest and Unittest: use Bitcoin's supermajority rule
-            if (CBlockIndex::IsSuperMajority(2, pindexPrev, Params().RejectBlockOutdatedMajority()))
-                enforceV2 = true;
-        }
-    }
-
-    if (enforceV2)
-    {
-        return state.Invalid(error("%s : rejected nVersion=1 block", __func__),
-                             REJECT_OBSOLETE, "bad-version");
-    }
-
-    // Reject block.nVersion=2 blocks when 95% (75% on testnet) of the network has upgraded:
-    if (block.nVersion < 3 && CBlockIndex::IsSuperMajority(3, pindexPrev, Params().RejectBlockOutdatedMajority()))
-    {
-        return state.Invalid(error("%s : rejected nVersion=2 block", __func__),
-                             REJECT_OBSOLETE, "bad-version");
-    }
-
-    // Reject block.nVersion=3 blocks when 95% (75% on testnet) of the network has upgraded:
-    if (block.nVersion < 4 && CBlockIndex::IsSuperMajority(4, pindexPrev, Params().RejectBlockOutdatedMajority()))
-        return state.Invalid(error("%s : rejected nVersion=3 block", __func__),
-                             REJECT_OBSOLETE, "bad-version");
-
-    return true;
-}
-
-bool ContextualCheckBlock(const CBlock& block, CValidationState& state, CBlockIndex * const pindexPrev)
-{
-    const int nHeight = pindexPrev == NULL ? 0 : pindexPrev->nHeight + 1;
-
-    // Check that all transactions are finalized
-    BOOST_FOREACH(const CTransaction& tx, block.vtx)
-        if (!IsFinalTx(tx, nHeight, block.GetBlockTime())) {
-            return state.DoS(10, error("%s : contains a non-final transaction", __func__), REJECT_INVALID, "bad-txns-nonfinal");
-        }
-
-    // Litecoin: (mainnet >= 710000, testnet >= 400000, regtest uses supermajority)
-    // Enforce block.nVersion=2 rule that the coinbase starts with serialized block height
-    // if 750 of the last 1,000 blocks are version 2 or greater (51/100 if testnet):
-    bool checkHeightMismatch = false;
-    if (block.nVersion >= 2)
-    {
-        if (Params().EnforceV2AfterHeight() != -1)
-        {
-            // Mainnet 710k, Testnet 400k
-            if (nHeight >= Params().EnforceV2AfterHeight())
-                checkHeightMismatch = true;
-        }
-        else
-        {
-            // Regtest and Unittest: use Bitcoin's supermajority rule
-            if (CBlockIndex::IsSuperMajority(2, pindexPrev, Params().EnforceBlockUpgradeMajority()))
-                checkHeightMismatch = true;
-        }
-    }
-
-    if (checkHeightMismatch)
-    {
-        CScript expect = CScript() << nHeight;
-        if (block.vtx[0].vin[0].scriptSig.size() < expect.size() ||
-            !std::equal(expect.begin(), expect.end(), block.vtx[0].vin[0].scriptSig.begin())) {
-            return state.DoS(100, error("%s : block height mismatch in coinbase", __func__), REJECT_INVALID, "bad-cb-height");
-        }
-    }
-
-    return true;
-}
-
-bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex** ppindex)
-{
-    AssertLockHeld(cs_main);
-    // Check for duplicate
-    uint256 hash = block.GetHash();
-    BlockMap::iterator miSelf = mapBlockIndex.find(hash);
-    CBlockIndex *pindex = NULL;
-    if (miSelf != mapBlockIndex.end()) {
-        // Block header is already known.
-        pindex = miSelf->second;
-        if (ppindex)
-            *ppindex = pindex;
-        if (pindex->nStatus & BLOCK_FAILED_MASK)
-            return state.Invalid(error("%s : block is marked invalid", __func__), 0, "duplicate");
-        return true;
-    }
-
-    if (!CheckBlockHeader(block, state))
-        return false;
-
-    // Get prev block index
-    CBlockIndex* pindexPrev = NULL;
-    if (hash != Params().HashGenesisBlock()) {
-        BlockMap::iterator mi = mapBlockIndex.find(block.hashPrevBlock);
-        if (mi == mapBlockIndex.end())
-            return state.DoS(10, error("%s : prev block not found", __func__), 0, "bad-prevblk");
-        pindexPrev = (*mi).second;
-        if (pindexPrev->nStatus & BLOCK_FAILED_MASK)
-            return state.DoS(100, error("%s : prev block invalid", __func__), REJECT_INVALID, "bad-prevblk");
-    }
-
-    if (!ContextualCheckBlockHeader(block, state, pindexPrev))
-        return false;
-
-    if (pindex == NULL)
-        pindex = AddToBlockIndex(block);
-
-    if (ppindex)
-        *ppindex = pindex;
-
-    return true;
-}
-
-bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex, CDiskBlockPos* dbp)
-{
-    AssertLockHeld(cs_main);
-
-    CBlockIndex *&pindex = *ppindex;
-
-    if (!AcceptBlockHeader(block, state, &pindex))
-        return false;
-
-    if (pindex->nStatus & BLOCK_HAVE_DATA) {
-        // TODO: deal better with duplicate blocks.
-        // return state.DoS(20, error("AcceptBlock() : already have block %d %s", pindex->nHeight, pindex->GetBlockHash().ToString()), REJECT_DUPLICATE, "duplicate");
-        return true;
-    }
-
-    if ((!CheckBlock(block, state)) || !ContextualCheckBlock(block, state, pindex->pprev)) {
-        if (state.IsInvalid() && !state.CorruptionPossible()) {
-            pindex->nStatus |= BLOCK_FAILED_VALID;
-            setDirtyBlockIndex.insert(pindex);
-        }
-        return false;
-    }
-
-    int nHeight = pindex->nHeight;
-
-    // Write block to history file
-    try {
-        unsigned int nBlockSize = ::GetSerializeSize(block, SER_DISK, CLIENT_VERSION);
-        CDiskBlockPos blockPos;
-        if (dbp != NULL)
-            blockPos = *dbp;
-        if (!FindBlockPos(state, blockPos, nBlockSize+8, nHeight, block.GetBlockTime(), dbp != NULL))
-            return error("AcceptBlock() : FindBlockPos failed");
-        if (dbp == NULL)
-            if (!WriteBlockToDisk(block, blockPos))
-                return state.Abort("Failed to write block");
-        if (!ReceivedBlockTransactions(block, state, pindex, blockPos))
-            return error("AcceptBlock() : ReceivedBlockTransactions failed");
-    } catch(std::runtime_error &e) {
-        return state.Abort(std::string("System error: ") + e.what());
-    }
-
-    return true;
-}
-
-bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired)
-{
-    unsigned int nToCheck = Params().ToCheckBlockUpgradeMajority();
-    unsigned int nFound = 0;
-    for (unsigned int i = 0; i < nToCheck && nFound < nRequired && pstart != NULL; i++)
-    {
-        if (pstart->nVersion >= minVersion)
-            ++nFound;
-        pstart = pstart->pprev;
-    }
-    return (nFound >= nRequired);
-}
-
-/** Turn the lowest '1' bit in the binary representation of a number into a '0'. */
-int static inline InvertLowestOne(int n) { return n & (n - 1); }
-
-/** Compute what height to jump back to with the CBlockIndex::pskip pointer. */
-int static inline GetSkipHeight(int height) {
-    if (height < 2)
-        return 0;
-
-    // Determine which height to jump back to. Any number strictly lower than height is acceptable,
-    // but the following expression seems to perform well in simulations (max 110 steps to go back
-    // up to 2**18 blocks).
-    return (height & 1) ? InvertLowestOne(InvertLowestOne(height - 1)) + 1 : InvertLowestOne(height);
-}
-
-CBlockIndex* CBlockIndex::GetAncestor(int height)
-{
-    if (height > nHeight || height < 0)
-        return NULL;
-
-    CBlockIndex* pindexWalk = this;
-    int heightWalk = nHeight;
-    while (heightWalk > height) {
-        int heightSkip = GetSkipHeight(heightWalk);
-        int heightSkipPrev = GetSkipHeight(heightWalk - 1);
-        if (heightSkip == height ||
-            (heightSkip > height && !(heightSkipPrev < heightSkip - 2 &&
-                                      heightSkipPrev >= height))) {
-            // Only follow pskip if pprev->pskip isn't better than pskip->pprev.
-            pindexWalk = pindexWalk->pskip;
-            heightWalk = heightSkip;
-        } else {
-            pindexWalk = pindexWalk->pprev;
-            heightWalk--;
-        }
-    }
-    return pindexWalk;
-}
-
-const CBlockIndex* CBlockIndex::GetAncestor(int height) const
-{
-    return const_cast<CBlockIndex*>(this)->GetAncestor(height);
-}
-
-void CBlockIndex::BuildSkip()
-{
-    if (pprev)
-        pskip = pprev->GetAncestor(GetSkipHeight(nHeight));
-}
-
-bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, CDiskBlockPos *dbp)
-{
-    // Preliminary checks
-    bool checked = CheckBlock(*pblock, state);
-
-    {
-        LOCK(cs_main);
-        MarkBlockAsReceived(pblock->GetHash());
-        if (!checked) {
-            return error("%s : CheckBlock FAILED", __func__);
-        }
-
-        // Store to disk
-        CBlockIndex *pindex = NULL;
-        bool ret = AcceptBlock(*pblock, state, &pindex, dbp);
-        if (pindex && pfrom) {
-            mapBlockSource[pindex->GetBlockHash()] = pfrom->GetId();
-        }
-        CheckBlockIndex();
-        if (!ret)
-            return error("%s : AcceptBlock FAILED", __func__);
-    }
-
-    if (!ActivateBestChain(state, pblock))
-        return error("%s : ActivateBestChain failed", __func__);
-
-    return true;
-}
-
-bool TestBlockValidity(CValidationState &state, const CBlock& block, CBlockIndex * const pindexPrev, bool fCheckPOW, bool fCheckMerkleRoot)
-{
-    AssertLockHeld(cs_main);
-    assert(pindexPrev == chainActive.Tip());
-
-    CCoinsViewCache viewNew(pcoinsTip);
-    CBlockIndex indexDummy(block);
-    indexDummy.pprev = pindexPrev;
-    indexDummy.nHeight = pindexPrev->nHeight + 1;
-
-    // NOTE: CheckBlockHeader is called by CheckBlock
-    if (!ContextualCheckBlockHeader(block, state, pindexPrev))
-        return false;
-    if (!CheckBlock(block, state, fCheckPOW, fCheckMerkleRoot))
-        return false;
-    if (!ContextualCheckBlock(block, state, pindexPrev))
-        return false;
-    if (!ConnectBlock(block, state, &indexDummy, viewNew, true))
-        return false;
-    assert(state.IsValid());
-
-    return true;
-}
-
-
-
-
-
-
-
-
-bool AbortNode(const std::string &strMessage, const std::string &userMessage) {
-    strMiscWarning = strMessage;
-    LogPrintf("*** %s\n", strMessage);
-    uiInterface.ThreadSafeMessageBox(
-        userMessage.empty() ? _("Error: A fatal internal error occurred, see debug.log for details") : userMessage,
-        "", CClientUIInterface::MSG_ERROR);
-    StartShutdown();
-    return false;
-}
-
-bool CheckDiskSpace(uint64_t nAdditionalBytes)
-{
-    uint64_t nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
-
-    // Check for nMinDiskSpace bytes (currently 50MB)
-    if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes)
-        return AbortNode("Disk space is low!", _("Error: Disk space is low!"));
-
-    return true;
-}
-
-FILE* OpenDiskFile(const CDiskBlockPos &pos, const char *prefix, bool fReadOnly)
-{
-    if (pos.IsNull())
-        return NULL;
-    boost::filesystem::path path = GetBlockPosFilename(pos, prefix);
-    boost::filesystem::create_directories(path.parent_path());
-    FILE* file = fopen(path.string().c_str(), "rb+");
-    if (!file && !fReadOnly)
-        file = fopen(path.string().c_str(), "wb+");
-    if (!file) {
-        LogPrintf("Unable to open file %s\n", path.string());
-        return NULL;
-    }
-    if (pos.nPos) {
-        if (fseek(file, pos.nPos, SEEK_SET)) {
-            LogPrintf("Unable to seek to position %u of %s\n", pos.nPos, path.string());
-            fclose(file);
-            return NULL;
-        }
-    }
-    return file;
-}
-
-FILE* OpenBlockFile(const CDiskBlockPos &pos, bool fReadOnly) {
-    return OpenDiskFile(pos, "blk", fReadOnly);
-}
-
-FILE* OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly) {
-    return OpenDiskFile(pos, "rev", fReadOnly);
-}
-
-boost::filesystem::path GetBlockPosFilename(const CDiskBlockPos &pos, const char *prefix)
-{
-    return GetDataDir() / "blocks" / strprintf("%s%05u.dat", prefix, pos.nFile);
-}
-
-CBlockIndex * InsertBlockIndex(uint256 hash)
-{
-    if (hash == 0)
-        return NULL;
-
-    // Return existing
-    BlockMap::iterator mi = mapBlockIndex.find(hash);
-    if (mi != mapBlockIndex.end())
-        return (*mi).second;
-
-    // Create new
-    CBlockIndex* pindexNew = new CBlockIndex();
-    if (!pindexNew)
-        throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
-    mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
-    pindexNew->phashBlock = &((*mi).first);
-
-    return pindexNew;
-}
-
-bool static LoadBlockIndexDB()
-{
-    if (!pblocktree->LoadBlockIndexGuts())
-        return false;
-
-    boost::this_thread::interruption_point();
-
-    // Calculate nChainWork
-    vector<pair<int, CBlockIndex*> > vSortedByHeight;
-    vSortedByHeight.reserve(mapBlockIndex.size());
-    BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
-    {
-        CBlockIndex* pindex = item.second;
-        vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
-    }
-    sort(vSortedByHeight.begin(), vSortedByHeight.end());
-    BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
-    {
-        CBlockIndex* pindex = item.second;
-        pindex->nChainWork = (pindex->pprev ? pindex->pprev->nChainWork : 0) + GetBlockProof(*pindex);
-        if (pindex->nStatus & BLOCK_HAVE_DATA) {
-            if (pindex->pprev) {
-                if (pindex->pprev->nChainTx) {
-                    pindex->nChainTx = pindex->pprev->nChainTx + pindex->nTx;
-                } else {
-                    pindex->nChainTx = 0;
-                    mapBlocksUnlinked.insert(std::make_pair(pindex->pprev, pindex));
-                }
-            } else {
-                pindex->nChainTx = pindex->nTx;
-            }
-        }
-        if (pindex->IsValid(BLOCK_VALID_TRANSACTIONS) && (pindex->nChainTx || pindex->pprev == NULL))
-            setBlockIndexCandidates.insert(pindex);
-        if (pindex->nStatus & BLOCK_FAILED_MASK && (!pindexBestInvalid || pindex->nChainWork > pindexBestInvalid->nChainWork))
-            pindexBestInvalid = pindex;
-        if (pindex->pprev)
-            pindex->BuildSkip();
-        if (pindex->IsValid(BLOCK_VALID_TREE) && (pindexBestHeader == NULL || CBlockIndexWorkComparator()(pindexBestHeader, pindex)))
-            pindexBestHeader = pindex;
-    }
-
-    // Load block file info
-    pblocktree->ReadLastBlockFile(nLastBlockFile);
-    vinfoBlockFile.resize(nLastBlockFile + 1);
-    LogPrintf("%s: last block file = %i\n", __func__, nLastBlockFile);
-    for (int nFile = 0; nFile <= nLastBlockFile; nFile++) {
-        pblocktree->ReadBlockFileInfo(nFile, vinfoBlockFile[nFile]);
-    }
-    LogPrintf("%s: last block file info: %s\n", __func__, vinfoBlockFile[nLastBlockFile].ToString());
-    for (int nFile = nLastBlockFile + 1; true; nFile++) {
-        CBlockFileInfo info;
-        if (pblocktree->ReadBlockFileInfo(nFile, info)) {
-            vinfoBlockFile.push_back(info);
-        } else {
-            break;
-        }
-    }
-
-    // Check presence of blk files
-    LogPrintf("Checking all blk files are present...\n");
-    set<int> setBlkDataFiles;
-    BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
-    {
-        CBlockIndex* pindex = item.second;
-        if (pindex->nStatus & BLOCK_HAVE_DATA) {
-            setBlkDataFiles.insert(pindex->nFile);
-        }
-    }
-    for (std::set<int>::iterator it = setBlkDataFiles.begin(); it != setBlkDataFiles.end(); it++)
-    {
-        CDiskBlockPos pos(*it, 0);
-        if (CAutoFile(OpenBlockFile(pos, true), SER_DISK, CLIENT_VERSION).IsNull()) {
-            return false;
-        }
-    }
-
-    // Check whether we need to continue reindexing
-    bool fReindexing = false;
-    pblocktree->ReadReindexing(fReindexing);
-    fReindex |= fReindexing;
-
-    // Check whether we have a transaction index
-    pblocktree->ReadFlag("txindex", fTxIndex);
-    LogPrintf("LoadBlockIndexDB(): transaction index %s\n", fTxIndex ? "enabled" : "disabled");
-
-    // Load pointer to end of best chain
-    BlockMap::iterator it = mapBlockIndex.find(pcoinsTip->GetBestBlock());
-    if (it == mapBlockIndex.end())
-        return true;
-    chainActive.SetTip(it->second);
-
-    PruneBlockIndexCandidates();
-
-    LogPrintf("LoadBlockIndexDB(): hashBestChain=%s height=%d date=%s progress=%f\n",
-        chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(),
-        DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()),
-        Checkpoints::GuessVerificationProgress(chainActive.Tip()));
-
-    return true;
-}
-
-CVerifyDB::CVerifyDB()
-{
-    uiInterface.ShowProgress(_("Verifying blocks..."), 0);
-}
-
-CVerifyDB::~CVerifyDB()
-{
-    uiInterface.ShowProgress("", 100);
-}
-
-bool CVerifyDB::VerifyDB(CCoinsView *coinsview, int nCheckLevel, int nCheckDepth)
-{
-    LOCK(cs_main);
-    if (chainActive.Tip() == NULL || chainActive.Tip()->pprev == NULL)
-        return true;
-
-    // Verify blocks in the best chain
-    if (nCheckDepth <= 0)
-        nCheckDepth = 1000000000; // suffices until the year 19000
-    if (nCheckDepth > chainActive.Height())
-        nCheckDepth = chainActive.Height();
-    nCheckLevel = std::max(0, std::min(4, nCheckLevel));
-    LogPrintf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
-    CCoinsViewCache coins(coinsview);
-    CBlockIndex* pindexState = chainActive.Tip();
-    CBlockIndex* pindexFailure = NULL;
-    int nGoodTransactions = 0;
-    CValidationState state;
-    for (CBlockIndex* pindex = chainActive.Tip(); pindex && pindex->pprev; pindex = pindex->pprev)
-    {
-        boost::this_thread::interruption_point();
-        uiInterface.ShowProgress(_("Verifying blocks..."), std::max(1, std::min(99, (int)(((double)(chainActive.Height() - pindex->nHeight)) / (double)nCheckDepth * (nCheckLevel >= 4 ? 50 : 100)))));
-        if (pindex->nHeight < chainActive.Height()-nCheckDepth)
-            break;
-        CBlock block;
-        // check level 0: read from disk
-        if (!ReadBlockFromDisk(block, pindex))
-            return error("VerifyDB() : *** ReadBlockFromDisk failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
-        // check level 1: verify block validity
-        if (nCheckLevel >= 1 && !CheckBlock(block, state))
-            return error("VerifyDB() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
-        // check level 2: verify undo validity
-        if (nCheckLevel >= 2 && pindex) {
-            CBlockUndo undo;
-            CDiskBlockPos pos = pindex->GetUndoPos();
-            if (!pos.IsNull()) {
-                if (!undo.ReadFromDisk(pos, pindex->pprev->GetBlockHash()))
-                    return error("VerifyDB() : *** found bad undo data at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
-            }
-        }
-        // check level 3: check for inconsistencies during memory-only disconnect of tip blocks
-        if (nCheckLevel >= 3 && pindex == pindexState && (coins.GetCacheSize() + pcoinsTip->GetCacheSize()) <= nCoinCacheSize) {
-            bool fClean = true;
-            if (!DisconnectBlock(block, state, pindex, coins, &fClean))
-                return error("VerifyDB() : *** irrecoverable inconsistency in block data at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
-            pindexState = pindex->pprev;
-            if (!fClean) {
-                nGoodTransactions = 0;
-                pindexFailure = pindex;
-            } else
-                nGoodTransactions += block.vtx.size();
-        }
-        if (ShutdownRequested())
-            return true;
-    }
-    if (pindexFailure)
-        return error("VerifyDB() : *** coin database inconsistencies found (last %i blocks, %i good transactions before that)\n", chainActive.Height() - pindexFailure->nHeight + 1, nGoodTransactions);
-
-    // check level 4: try reconnecting blocks
-    if (nCheckLevel >= 4) {
-        CBlockIndex *pindex = pindexState;
-        while (pindex != chainActive.Tip()) {
-            boost::this_thread::interruption_point();
-            uiInterface.ShowProgress(_("Verifying blocks..."), std::max(1, std::min(99, 100 - (int)(((double)(chainActive.Height() - pindex->nHeight)) / (double)nCheckDepth * 50))));
-            pindex = chainActive.Next(pindex);
-            CBlock block;
-            if (!ReadBlockFromDisk(block, pindex))
-                return error("VerifyDB() : *** ReadBlockFromDisk failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
-            if (!ConnectBlock(block, state, pindex, coins))
-                return error("VerifyDB() : *** found unconnectable block at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
-        }
-    }
-
-    LogPrintf("No coin database inconsistencies in last %i blocks (%i transactions)\n", chainActive.Height() - pindexState->nHeight, nGoodTransactions);
-
-    return true;
-}
-
-void UnloadBlockIndex()
-{
-    mapBlockIndex.clear();
-    setBlockIndexCandidates.clear();
-    chainActive.SetTip(NULL);
-    pindexBestInvalid = NULL;
-}
-
-bool LoadBlockIndex()
-{
-    // Load block index from databases
-    if (!fReindex && !LoadBlockIndexDB())
-        return false;
-    return true;
-}
-
-
-bool InitBlockIndex() {
-    LOCK(cs_main);
-    // Check whether we're already initialized
-    if (chainActive.Genesis() != NULL)
-        return true;
-
-    // Use the provided setting for -txindex in the new database
-    fTxIndex = GetBoolArg("-txindex", false);
-    pblocktree->WriteFlag("txindex", fTxIndex);
-    LogPrintf("Initializing databases...\n");
-
-    // Only add the genesis block if not reindexing (in which case we reuse the one already on disk)
-    if (!fReindex) {
-        try {
-            CBlock &block = const_cast<CBlock&>(Params().GenesisBlock());
-            // Start new block file
-            unsigned int nBlockSize = ::GetSerializeSize(block, SER_DISK, CLIENT_VERSION);
-            CDiskBlockPos blockPos;
-            CValidationState state;
-            if (!FindBlockPos(state, blockPos, nBlockSize+8, 0, block.GetBlockTime()))
-                return error("LoadBlockIndex() : FindBlockPos failed");
-            if (!WriteBlockToDisk(block, blockPos))
-                return error("LoadBlockIndex() : writing genesis block to disk failed");
-            CBlockIndex *pindex = AddToBlockIndex(block);
-            if (!ReceivedBlockTransactions(block, state, pindex, blockPos))
-                return error("LoadBlockIndex() : genesis block not accepted");
-            if (!ActivateBestChain(state, &block))
-                return error("LoadBlockIndex() : genesis block cannot be activated");
-            // Force a chainstate write so that when we VerifyDB in a moment, it doesnt check stale data
-            return FlushStateToDisk(state, FLUSH_STATE_ALWAYS);
-        } catch(std::runtime_error &e) {
-            return error("LoadBlockIndex() : failed to initialize block database: %s", e.what());
-        }
-    }
-
-    return true;
-}
-
-
-
-bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
-{
-    // Map of disk positions for blocks with unknown parent (only used for reindex)
-    static std::multimap<uint256, CDiskBlockPos> mapBlocksUnknownParent;
-    int64_t nStart = GetTimeMillis();
-
-    int nLoaded = 0;
-    try {
-        // This takes over fileIn and calls fclose() on it in the CBufferedFile destructor
-        CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SIZE, MAX_BLOCK_SIZE+8, SER_DISK, CLIENT_VERSION);
-        uint64_t nRewind = blkdat.GetPos();
-        while (!blkdat.eof()) {
-            boost::this_thread::interruption_point();
-
-            blkdat.SetPos(nRewind);
-            nRewind++; // start one byte further next time, in case of failure
-            blkdat.SetLimit(); // remove former limit
-            unsigned int nSize = 0;
-            try {
-                // locate a header
-                unsigned char buf[MESSAGE_START_SIZE];
-                blkdat.FindByte(Params().MessageStart()[0]);
-                nRewind = blkdat.GetPos()+1;
-                blkdat >> FLATDATA(buf);
-                if (memcmp(buf, Params().MessageStart(), MESSAGE_START_SIZE))
-                    continue;
-                // read size
-                blkdat >> nSize;
-                if (nSize < 80 || nSize > MAX_BLOCK_SIZE)
-                    continue;
-            } catch (const std::exception &) {
-                // no valid block header found; don't complain
-                break;
-            }
-            try {
-                // read block
-                uint64_t nBlockPos = blkdat.GetPos();
-                if (dbp)
-                    dbp->nPos = nBlockPos;
-                blkdat.SetLimit(nBlockPos + nSize);
-                blkdat.SetPos(nBlockPos);
-                CBlock block;
-                blkdat >> block;
-                nRewind = blkdat.GetPos();
-
-                // detect out of order blocks, and store them for later
-                uint256 hash = block.GetHash();
-                if (hash != Params().HashGenesisBlock() && mapBlockIndex.find(block.hashPrevBlock) == mapBlockIndex.end()) {
-                    LogPrint("reindex", "%s: Out of order block %s, parent %s not known\n", __func__, hash.ToString(),
-                            block.hashPrevBlock.ToString());
-                    if (dbp)
-                        mapBlocksUnknownParent.insert(std::make_pair(block.hashPrevBlock, *dbp));
-                    continue;
-                }
-
-                // process in case the block isn't known yet
-                if (mapBlockIndex.count(hash) == 0 || (mapBlockIndex[hash]->nStatus & BLOCK_HAVE_DATA) == 0) {
-                    CValidationState state;
-                    if (ProcessNewBlock(state, NULL, &block, dbp))
-                        nLoaded++;
-                    if (state.IsError())
-                        break;
-                } else if (hash != Params().HashGenesisBlock() && mapBlockIndex[hash]->nHeight % 1000 == 0) {
-                    LogPrintf("Block Import: already had block %s at height %d\n", hash.ToString(), mapBlockIndex[hash]->nHeight);
-                }
-
-                // Recursively process earlier encountered successors of this block
-                deque<uint256> queue;
-                queue.push_back(hash);
-                while (!queue.empty()) {
-                    uint256 head = queue.front();
-                    queue.pop_front();
-                    std::pair<std::multimap<uint256, CDiskBlockPos>::iterator, std::multimap<uint256, CDiskBlockPos>::iterator> range = mapBlocksUnknownParent.equal_range(head);
-                    while (range.first != range.second) {
-                        std::multimap<uint256, CDiskBlockPos>::iterator it = range.first;
-                        if (ReadBlockFromDisk(block, it->second))
-                        {
-                            LogPrintf("%s: Processing out of order child %s of %s\n", __func__, block.GetHash().ToString(),
-                                    head.ToString());
-                            CValidationState dummy;
-                            if (ProcessNewBlock(dummy, NULL, &block, &it->second))
-                            {
-                                nLoaded++;
-                                queue.push_back(block.GetHash());
-                            }
-                        }
-                        range.first++;
-                        mapBlocksUnknownParent.erase(it);
-                    }
-                }
-            } catch (std::exception &e) {
-                LogPrintf("%s : Deserialize or I/O error - %s", __func__, e.what());
-            }
-        }
-    } catch(std::runtime_error &e) {
-        AbortNode(std::string("System error: ") + e.what());
-    }
-    if (nLoaded > 0)
-        LogPrintf("Loaded %i blocks from external file in %dms\n", nLoaded, GetTimeMillis() - nStart);
-    return nLoaded > 0;
-}
-
-void static CheckBlockIndex()
-{
-    if (!fCheckBlockIndex) {
-        return;
-    }
-
-    LOCK(cs_main);
-
-    // During a reindex, we read the genesis block and call CheckBlockIndex before ActivateBestChain,
-    // so we have the genesis block in mapBlockIndex but no active chain.  (A few of the tests when
-    // iterating the block tree require that chainActive has been initialized.)
-    if (chainActive.Height() < 0) {
-        assert(mapBlockIndex.size() <= 1);
-        return;
-    }
-
-    // Build forward-pointing map of the entire block tree.
-    std::multimap<CBlockIndex*,CBlockIndex*> forward;
-    for (BlockMap::iterator it = mapBlockIndex.begin(); it != mapBlockIndex.end(); it++) {
-        forward.insert(std::make_pair(it->second->pprev, it->second));
-    }
-
-    assert(forward.size() == mapBlockIndex.size());
-
-    std::pair<std::multimap<CBlockIndex*,CBlockIndex*>::iterator,std::multimap<CBlockIndex*,CBlockIndex*>::iterator> rangeGenesis = forward.equal_range(NULL);
-    CBlockIndex *pindex = rangeGenesis.first->second;
-    rangeGenesis.first++;
-    assert(rangeGenesis.first == rangeGenesis.second); // There is only one index entry with parent NULL.
-
-    // Iterate over the entire block tree, using depth-first search.
-    // Along the way, remember whether there are blocks on the path from genesis
-    // block being explored which are the first to have certain properties.
-    size_t nNodes = 0;
-    int nHeight = 0;
-    CBlockIndex* pindexFirstInvalid = NULL; // Oldest ancestor of pindex which is invalid.
-    CBlockIndex* pindexFirstMissing = NULL; // Oldest ancestor of pindex which does not have BLOCK_HAVE_DATA.
-    CBlockIndex* pindexFirstNotTreeValid = NULL; // Oldest ancestor of pindex which does not have BLOCK_VALID_TREE (regardless of being valid or not).
-    CBlockIndex* pindexFirstNotChainValid = NULL; // Oldest ancestor of pindex which does not have BLOCK_VALID_CHAIN (regardless of being valid or not).
-    CBlockIndex* pindexFirstNotScriptsValid = NULL; // Oldest ancestor of pindex which does not have BLOCK_VALID_SCRIPTS (regardless of being valid or not).
-    while (pindex != NULL) {
-        nNodes++;
-        if (pindexFirstInvalid == NULL && pindex->nStatus & BLOCK_FAILED_VALID) pindexFirstInvalid = pindex;
-        if (pindexFirstMissing == NULL && !(pindex->nStatus & BLOCK_HAVE_DATA)) pindexFirstMissing = pindex;
-        if (pindex->pprev != NULL && pindexFirstNotTreeValid == NULL && (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_TREE) pindexFirstNotTreeValid = pindex;
-        if (pindex->pprev != NULL && pindexFirstNotChainValid == NULL && (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_CHAIN) pindexFirstNotChainValid = pindex;
-        if (pindex->pprev != NULL && pindexFirstNotScriptsValid == NULL && (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_SCRIPTS) pindexFirstNotScriptsValid = pindex;
-
-        // Begin: actual consistency checks.
-        if (pindex->pprev == NULL) {
-            // Genesis block checks.
-            assert(pindex->GetBlockHash() == Params().HashGenesisBlock()); // Genesis block's hash must match.
-            assert(pindex == chainActive.Genesis()); // The current active chain's genesis block must be this block.
-        }
-        // HAVE_DATA is equivalent to VALID_TRANSACTIONS and equivalent to nTx > 0 (we stored the number of transactions in the block)
-        assert(!(pindex->nStatus & BLOCK_HAVE_DATA) == (pindex->nTx == 0));
-        assert(((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TRANSACTIONS) == (pindex->nTx > 0));
-        if (pindex->nChainTx == 0) assert(pindex->nSequenceId == 0);  // nSequenceId can't be set for blocks that aren't linked
-        // All parents having data is equivalent to all parents being VALID_TRANSACTIONS, which is equivalent to nChainTx being set.
-        assert((pindexFirstMissing != NULL) == (pindex->nChainTx == 0)); // nChainTx == 0 is used to signal that all parent block's transaction data is available.
-        assert(pindex->nHeight == nHeight); // nHeight must be consistent.
-        assert(pindex->pprev == NULL || pindex->nChainWork >= pindex->pprev->nChainWork); // For every block except the genesis block, the chainwork must be larger than the parent's.
-        assert(nHeight < 2 || (pindex->pskip && (pindex->pskip->nHeight < nHeight))); // The pskip pointer must point back for all but the first 2 blocks.
-        assert(pindexFirstNotTreeValid == NULL); // All mapBlockIndex entries must at least be TREE valid
-        if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TREE) assert(pindexFirstNotTreeValid == NULL); // TREE valid implies all parents are TREE valid
-        if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_CHAIN) assert(pindexFirstNotChainValid == NULL); // CHAIN valid implies all parents are CHAIN valid
-        if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_SCRIPTS) assert(pindexFirstNotScriptsValid == NULL); // SCRIPTS valid implies all parents are SCRIPTS valid
-        if (pindexFirstInvalid == NULL) {
-            // Checks for not-invalid blocks.
-            assert((pindex->nStatus & BLOCK_FAILED_MASK) == 0); // The failed mask cannot be set for blocks without invalid parents.
-        }
-        if (!CBlockIndexWorkComparator()(pindex, chainActive.Tip()) && pindexFirstMissing == NULL) {
-            if (pindexFirstInvalid == NULL) { // If this block sorts at least as good as the current tip and is valid, it must be in setBlockIndexCandidates.
-                 assert(setBlockIndexCandidates.count(pindex));
-            }
-        } else { // If this block sorts worse than the current tip, it cannot be in setBlockIndexCandidates.
-            assert(setBlockIndexCandidates.count(pindex) == 0);
-        }
-        // Check whether this block is in mapBlocksUnlinked.
-        std::pair<std::multimap<CBlockIndex*,CBlockIndex*>::iterator,std::multimap<CBlockIndex*,CBlockIndex*>::iterator> rangeUnlinked = mapBlocksUnlinked.equal_range(pindex->pprev);
-        bool foundInUnlinked = false;
-        while (rangeUnlinked.first != rangeUnlinked.second) {
-            assert(rangeUnlinked.first->first == pindex->pprev);
-            if (rangeUnlinked.first->second == pindex) {
-                foundInUnlinked = true;
-                break;
-            }
-            rangeUnlinked.first++;
-        }
-        if (pindex->pprev && pindex->nStatus & BLOCK_HAVE_DATA && pindexFirstMissing != NULL) {
-            if (pindexFirstInvalid == NULL) { // If this block has block data available, some parent doesn't, and has no invalid parents, it must be in mapBlocksUnlinked.
-                assert(foundInUnlinked);
-            }
-        } else { // If this block does not have block data available, or all parents do, it cannot be in mapBlocksUnlinked.
-            assert(!foundInUnlinked);
-        }
-        // assert(pindex->GetBlockHash() == pindex->GetBlockHeader().GetHash()); // Perhaps too slow
-        // End: actual consistency checks.
-
-        // Try descending into the first subnode.
-        std::pair<std::multimap<CBlockIndex*,CBlockIndex*>::iterator,std::multimap<CBlockIndex*,CBlockIndex*>::iterator> range = forward.equal_range(pindex);
-        if (range.first != range.second) {
-            // A subnode was found.
-            pindex = range.first->second;
-            nHeight++;
-            continue;
-        }
-        // This is a leaf node.
-        // Move upwards until we reach a node of which we have not yet visited the last child.
-        while (pindex) {
-            // We are going to either move to a parent or a sibling of pindex.
-            // If pindex was the first with a certain property, unset the corresponding variable.
-            if (pindex == pindexFirstInvalid) pindexFirstInvalid = NULL;
-            if (pindex == pindexFirstMissing) pindexFirstMissing = NULL;
-            if (pindex == pindexFirstNotTreeValid) pindexFirstNotTreeValid = NULL;
-            if (pindex == pindexFirstNotChainValid) pindexFirstNotChainValid = NULL;
-            if (pindex == pindexFirstNotScriptsValid) pindexFirstNotScriptsValid = NULL;
-            // Find our parent.
-            CBlockIndex* pindexPar = pindex->pprev;
-            // Find which child we just visited.
-            std::pair<std::multimap<CBlockIndex*,CBlockIndex*>::iterator,std::multimap<CBlockIndex*,CBlockIndex*>::iterator> rangePar = forward.equal_range(pindexPar);
-            while (rangePar.first->second != pindex) {
-                assert(rangePar.first != rangePar.second); // Our parent must have at least the node we're coming from as child.
-                rangePar.first++;
-            }
-            // Proceed to the next one.
-            rangePar.first++;
-            if (rangePar.first != rangePar.second) {
-                // Move to the sibling.
-                pindex = rangePar.first->second;
-                break;
-            } else {
-                // Move up further.
-                pindex = pindexPar;
-                nHeight--;
-                continue;
-            }
-        }
-    }
-
-    // Check that we actually traversed the entire map.
-    assert(nNodes == forward.size());
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// CAlert
-//
-
-string GetWarnings(string strFor)
-{
-    int nPriority = 0;
-    string strStatusBar;
-    string strRPC;
-
-    if (!CLIENT_VERSION_IS_RELEASE)
-        strStatusBar = _("This is a pre-release test build - use at your own risk - do not use for mining or merchant applications");
-
-    if (GetBoolArg("-testsafemode", false))
-        strStatusBar = strRPC = "testsafemode enabled";
-
-    // Misc warnings like out of disk space and clock is wrong
-    if (strMiscWarning != "")
-    {
-        nPriority = 1000;
-        strStatusBar = strMiscWarning;
-    }
-
-    if (fLargeWorkForkFound)
-    {
-        nPriority = 2000;
-        strStatusBar = strRPC = _("Warning: The network does not appear to fully agree! Some miners appear to be experiencing issues.");
-    }
-    else if (fLargeWorkInvalidChainFound)
-    {
-        nPriority = 2000;
-        strStatusBar = strRPC = _("Warning: We do not appear to fully agree with our peers! You may need to upgrade, or other nodes may need to upgrade.");
-    }
-
-    // Alerts
-    {
-        LOCK(cs_mapAlerts);
-        BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
-        {
-            const CAlert& alert = item.second;
-            if (alert.AppliesToMe() && alert.nPriority > nPriority)
-            {
-                nPriority = alert.nPriority;
-                strStatusBar = alert.strStatusBar;
-            }
-        }
-    }
-
-    if (strFor == "statusbar")
-        return strStatusBar;
-    else if (strFor == "rpc")
-        return strRPC;
-    assert(!"GetWarnings() : invalid parameter");
-    return "error";
-}
-
-
-void static RelayAlerts(CNode* pfrom)
-{
-    LOCK(cs_mapAlerts);
-    BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
-        item.second.RelayTo(pfrom);
-}
-
-
-
-
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Messages
-//
-
-
-bool static AlreadyHave(const CInv& inv)
-{
-    switch (inv.type)
-    {
-    case MSG_TX:
-        {
-            bool txInMap = false;
-            txInMap = mempool.exists(inv.hash);
-            return txInMap || mapOrphanTransactions.count(inv.hash) ||
-                pcoinsTip->HaveCoins(inv.hash);
-        }
-    case MSG_BLOCK:
-        return mapBlockIndex.count(inv.hash);
-    }
-    // Don't know what it is, just say we already got one
-    return true;
-}
-
-
-void static ProcessGetData(CNode* pfrom)
-{
-    std::deque<CInv>::iterator it = pfrom->vRecvGetData.begin();
-
-    vector<CInv> vNotFound;
-
-    LOCK(cs_main);
-
-    while (it != pfrom->vRecvGetData.end()) {
-        // Don't bother if send buffer is too full to respond anyway
-        if (pfrom->nSendSize >= SendBufferSize())
-            break;
-
-        const CInv &inv = *it;
-        {
-            boost::this_thread::interruption_point();
-            it++;
-
-            if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK)
-            {
-                bool send = false;
-                BlockMap::iterator mi = mapBlockIndex.find(inv.hash);
-                if (mi != mapBlockIndex.end())
-                {
-                    if (chainActive.Contains(mi->second)) {
-                        send = true;
-                    } else {
-                        // To prevent fingerprinting attacks, only send blocks outside of the active
-                        // chain if they are valid, and no more than a month older than the best header
-                        // chain we know about.
-                        send = mi->second->IsValid(BLOCK_VALID_SCRIPTS) && (pindexBestHeader != NULL) &&
-                            (mi->second->GetBlockTime() > pindexBestHeader->GetBlockTime() - 30 * 24 * 60 * 60);
-                        if (!send) {
-                            LogPrintf("ProcessGetData(): ignoring request from peer=%i for old block that isn't in the main chain\n", pfrom->GetId());
-                        }
-                    }
-                }
-                if (send)
-                {
-                    // Send block from disk
-                    CBlock block;
-                    if (!ReadBlockFromDisk(block, (*mi).second))
-                        assert(!"cannot load block from disk");
-                    if (inv.type == MSG_BLOCK)
-                        pfrom->PushMessage("block", block);
-                    else // MSG_FILTERED_BLOCK)
-                    {
-                        LOCK(pfrom->cs_filter);
-                        if (pfrom->pfilter)
-                        {
-                            CMerkleBlock merkleBlock(block, *pfrom->pfilter);
-                            pfrom->PushMessage("merkleblock", merkleBlock);
-                            // CMerkleBlock just contains hashes, so also push any transactions in the block the client did not see
-                            // This avoids hurting performance by pointlessly requiring a round-trip
-                            // Note that there is currently no way for a node to request any single transactions we didnt send here -
-                            // they must either disconnect and retry or request the full block.
-                            // Thus, the protocol spec specified allows for us to provide duplicate txn here,
-                            // however we MUST always provide at least what the remote peer needs
-                            typedef std::pair<unsigned int, uint256> PairType;
-                            BOOST_FOREACH(PairType& pair, merkleBlock.vMatchedTxn)
-                                if (!pfrom->setInventoryKnown.count(CInv(MSG_TX, pair.second)))
-                                    pfrom->PushMessage("tx", block.vtx[pair.first]);
-                        }
-                        // else
-                            // no response
-                    }
-
-                    // Trigger them to send a getblocks request for the next batch of inventory
-                    if (inv.hash == pfrom->hashContinue)
-                    {
-                        // Bypass PushInventory, this must send even if redundant,
-                        // and we want it right after the last block so they don't
-                        // wait for other stuff first.
-                        vector<CInv> vInv;
-                        vInv.push_back(CInv(MSG_BLOCK, chainActive.Tip()->GetBlockHash()));
-                        pfrom->PushMessage("inv", vInv);
-                        pfrom->hashContinue = 0;
-                    }
-                }
-            }
-            else if (inv.IsKnownType())
-            {
-                // Send stream from relay memory
-                bool pushed = false;
-                {
-                    LOCK(cs_mapRelay);
-                    map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
-                    if (mi != mapRelay.end()) {
-                        pfrom->PushMessage(inv.GetCommand(), (*mi).second);
-                        pushed = true;
-                    }
-                }
-                if (!pushed && inv.type == MSG_TX) {
-                    CTransaction tx;
-                    if (mempool.lookup(inv.hash, tx)) {
-                        CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
-                        ss.reserve(1000);
-                        ss << tx;
-                        pfrom->PushMessage("tx", ss);
-                        pushed = true;
-                    }
-                }
-                if (!pushed) {
-                    vNotFound.push_back(inv);
-                }
-            }
-
-            // Track requests for our stuff.
-            g_signals.Inventory(inv.hash);
-
-            if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK)
-                break;
-        }
-    }
-
-    pfrom->vRecvGetData.erase(pfrom->vRecvGetData.begin(), it);
-
-    if (!vNotFound.empty()) {
-        // Let the peer know that we didn't find what it asked for, so it doesn't
-        // have to wait around forever. Currently only SPV clients actually care
-        // about this message: it's needed when they are recursively walking the
-        // dependencies of relevant unconfirmed transactions. SPV clients want to
-        // do that because they want to know about (and store and rebroadcast and
-        // risk analyze) the dependencies of transactions relevant to them, without
-        // having to download the entire memory pool.
-        pfrom->PushMessage("notfound", vNotFound);
-    }
-}
-
-bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, int64_t nTimeReceived)
-{
-    RandAddSeedPerfmon();
-    LogPrint("net", "received: %s (%u bytes) peer=%d\n", SanitizeString(strCommand), vRecv.size(), pfrom->id);
-    if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
-    {
-        LogPrintf("dropmessagestest DROPPING RECV MESSAGE\n");
-        return true;
-    }
-
-
-
-
-    if (strCommand == "version")
-    {
-        // Each connection can only send one version message
-        if (pfrom->nVersion != 0)
-        {
-            pfrom->PushMessage("reject", strCommand, REJECT_DUPLICATE, string("Duplicate version message"));
-            Misbehaving(pfrom->GetId(), 1);
-            return false;
-        }
-
-        int64_t nTime;
-        CAddress addrMe;
-        CAddress addrFrom;
-        uint64_t nNonce = 1;
-        vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
-        if (pfrom->nVersion < MIN_PEER_PROTO_VERSION)
-        {
-            // relay alerts prior to disconnection
-            RelayAlerts(pfrom);
-            // disconnect from peers older than this proto version
-            LogPrintf("peer=%d using obsolete version %i; disconnecting\n", pfrom->id, pfrom->nVersion);
-            pfrom->PushMessage("reject", strCommand, REJECT_OBSOLETE,
-                               strprintf("Version must be %d or greater", MIN_PEER_PROTO_VERSION));
-            pfrom->fDisconnect = true;
-            return true;
-        }
-
-        if (pfrom->nVersion == 10300)
-            pfrom->nVersion = 300;
-        if (!vRecv.empty())
-            vRecv >> addrFrom >> nNonce;
-        if (!vRecv.empty()) {
-            vRecv >> LIMITED_STRING(pfrom->strSubVer, 256);
-            pfrom->cleanSubVer = SanitizeString(pfrom->strSubVer);
-        }
-
-        // Disconnect certain incompatible clients
-        const char *badSubVers[] = { "/potcoinseeder", "/reddcoinseeder", "/worldcoinseeder" };
-        for (int x = 0; x < 3; x++)
-        {
-            if (pfrom->cleanSubVer.find(badSubVers[x], 0) == 0)
-            {
-                LogPrintf("invalid subver %s at %s, disconnecting\n", pfrom->cleanSubVer, pfrom->addr.ToString());
-                pfrom->PushMessage("reject", strCommand, REJECT_INVALID, string("invalid client subver"));
-                pfrom->fDisconnect = true;
-                return true;
-            }
-        }
-
-        if (!vRecv.empty())
-            vRecv >> pfrom->nStartingHeight;
-        if (!vRecv.empty())
-            vRecv >> pfrom->fRelayTxes; // set to true after we get the first filter* message
-        else
-            pfrom->fRelayTxes = true;
-
-        // Disconnect if we connected to ourself
-        if (nNonce == nLocalHostNonce && nNonce > 1)
-        {
-            LogPrintf("connected to self at %s, disconnecting\n", pfrom->addr.ToString());
-            pfrom->fDisconnect = true;
-            return true;
-        }
-
-        pfrom->addrLocal = addrMe;
-        if (pfrom->fInbound && addrMe.IsRoutable())
-        {
-            SeenLocal(addrMe);
-        }
-
-        // Be shy and don't send version until we hear
-        if (pfrom->fInbound)
-            pfrom->PushVersion();
-
-        pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
-
-        // Potentially mark this peer as a preferred download peer.
-        UpdatePreferredDownload(pfrom, State(pfrom->GetId()));
-
-        // Change version
-        pfrom->PushMessage("verack");
-        pfrom->ssSend.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
-
-        if (!pfrom->fInbound)
-        {
-            // Advertise our address
-            if (fListen && !IsInitialBlockDownload())
-            {
-                CAddress addr = GetLocalAddress(&pfrom->addr);
-                if (addr.IsRoutable())
-                {
-                    pfrom->PushAddress(addr);
-                } else if (IsPeerAddrLocalGood(pfrom)) {
-                    addr.SetIP(pfrom->addrLocal);
-                    pfrom->PushAddress(addr);
-                }
-            }
-
-            // Get recent addresses
-            if (pfrom->fOneShot || pfrom->nVersion >= CADDR_TIME_VERSION || addrman.size() < 1000)
-            {
-                pfrom->PushMessage("getaddr");
-                pfrom->fGetAddr = true;
-            }
-            addrman.Good(pfrom->addr);
-        } else {
-            if (((CNetAddr)pfrom->addr) == (CNetAddr)addrFrom)
-            {
-                addrman.Add(addrFrom, addrFrom);
-                addrman.Good(addrFrom);
-            }
-        }
-
-        // Relay alerts
-        RelayAlerts(pfrom);
-
-        pfrom->fSuccessfullyConnected = true;
-
-        string remoteAddr;
-        if (fLogIPs)
-            remoteAddr = ", peeraddr=" + pfrom->addr.ToString();
-
-        LogPrintf("receive version message: %s: version %d, blocks=%d, us=%s, peer=%d%s\n",
-                  pfrom->cleanSubVer, pfrom->nVersion,
-                  pfrom->nStartingHeight, addrMe.ToString(), pfrom->id,
-                  remoteAddr);
-
-        AddTimeData(pfrom->addr, nTime);
-    }
-
-
-    else if (pfrom->nVersion == 0)
-    {
-        // Must have a version message before anything else
-        Misbehaving(pfrom->GetId(), 1);
-        return false;
-    }
-
-
-    else if (strCommand == "verack")
-    {
-        pfrom->SetRecvVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
-
-        // Mark this node as currently connected, so we update its timestamp later.
-        if (pfrom->fNetworkNode) {
-            LOCK(cs_main);
-            State(pfrom->GetId())->fCurrentlyConnected = true;
-        }
-    }
-
-
-    else if (strCommand == "addr")
-    {
-        vector<CAddress> vAddr;
-        vRecv >> vAddr;
-
-        // Don't want addr from older versions unless seeding
-        if (pfrom->nVersion < CADDR_TIME_VERSION && addrman.size() > 1000)
-            return true;
-        if (vAddr.size() > 1000)
-        {
-            Misbehaving(pfrom->GetId(), 20);
-            return error("message addr size() = %u", vAddr.size());
-        }
-
-        // Store the new addresses
-        vector<CAddress> vAddrOk;
-        int64_t nNow = GetAdjustedTime();
-        int64_t nSince = nNow - 10 * 60;
-        BOOST_FOREACH(CAddress& addr, vAddr)
-        {
-            boost::this_thread::interruption_point();
-
-            if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
-                addr.nTime = nNow - 5 * 24 * 60 * 60;
-            pfrom->AddAddressKnown(addr);
-            bool fReachable = IsReachable(addr);
-            if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
-            {
-                // Relay to a limited number of other nodes
-                {
-                    LOCK(cs_vNodes);
-                    // Use deterministic randomness to send to the same nodes for 24 hours
-                    // at a time so the setAddrKnowns of the chosen nodes prevent repeats
-                    static uint256 hashSalt;
-                    if (hashSalt == 0)
-                        hashSalt = GetRandHash();
-                    uint64_t hashAddr = addr.GetHash();
-                    uint256 hashRand = hashSalt ^ (hashAddr<<32) ^ ((GetTime()+hashAddr)/(24*60*60));
-                    hashRand = Hash(BEGIN(hashRand), END(hashRand));
-                    multimap<uint256, CNode*> mapMix;
-                    BOOST_FOREACH(CNode* pnode, vNodes)
-                    {
-                        if (pnode->nVersion < CADDR_TIME_VERSION)
-                            continue;
-                        unsigned int nPointer;
-                        memcpy(&nPointer, &pnode, sizeof(nPointer));
-                        uint256 hashKey = hashRand ^ nPointer;
-                        hashKey = Hash(BEGIN(hashKey), END(hashKey));
-                        mapMix.insert(make_pair(hashKey, pnode));
-                    }
-                    int nRelayNodes = fReachable ? 2 : 1; // limited relaying of addresses outside our network(s)
-                    for (multimap<uint256, CNode*>::iterator mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
-                        ((*mi).second)->PushAddress(addr);
-                }
-            }
-            // Do not store addresses outside our network
-            if (fReachable)
-                vAddrOk.push_back(addr);
-        }
-        addrman.Add(vAddrOk, pfrom->addr, 2 * 60 * 60);
-        if (vAddr.size() < 1000)
-            pfrom->fGetAddr = false;
-        if (pfrom->fOneShot)
-            pfrom->fDisconnect = true;
-    }
-
-
-    else if (strCommand == "inv")
-    {
-        vector<CInv> vInv;
-        vRecv >> vInv;
-        if (vInv.size() > MAX_INV_SZ)
-        {
-            Misbehaving(pfrom->GetId(), 20);
-            return error("message inv size() = %u", vInv.size());
-        }
-
-        LOCK(cs_main);
-
-        std::vector<CInv> vToFetch;
-
-        for (unsigned int nInv = 0; nInv < vInv.size(); nInv++)
-        {
-            const CInv &inv = vInv[nInv];
-
-            boost::this_thread::interruption_point();
-            pfrom->AddInventoryKnown(inv);
-
-            bool fAlreadyHave = AlreadyHave(inv);
-            LogPrint("net", "got inv: %s  %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom->id);
-
-            if (!fAlreadyHave && !fImporting && !fReindex && inv.type != MSG_BLOCK)
-                pfrom->AskFor(inv);
-
-            if (inv.type == MSG_BLOCK) {
-                UpdateBlockAvailability(pfrom->GetId(), inv.hash);
-                if (!fAlreadyHave && !fImporting && !fReindex && !mapBlocksInFlight.count(inv.hash)) {
-                    // First request the headers preceeding the announced block. In the normal fully-synced
-                    // case where a new block is announced that succeeds the current tip (no reorganization),
-                    // there are no such headers.
-                    // Secondly, and only when we are close to being synced, we request the announced block directly,
-                    // to avoid an extra round-trip. Note that we must *first* ask for the headers, so by the
-                    // time the block arrives, the header chain leading up to it is already validated. Not
-                    // doing this will result in the received block being rejected as an orphan in case it is
-                    // not a direct successor.
-                    pfrom->PushMessage("getheaders", chainActive.GetLocator(pindexBestHeader), inv.hash);
-                    CNodeState *nodestate = State(pfrom->GetId());
-                    if (chainActive.Tip()->GetBlockTime() > GetAdjustedTime() - Params().TargetSpacing() * 20 &&
-                        nodestate->nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
-                        vToFetch.push_back(inv);
-                        // Mark block as in flight already, even though the actual "getdata" message only goes out
-                        // later (within the same cs_main lock, though).
-                        MarkBlockAsInFlight(pfrom->GetId(), inv.hash);
-                    }
-                    LogPrint("net", "getheaders (%d) %s to peer=%d\n", pindexBestHeader->nHeight, inv.hash.ToString(), pfrom->id);
-                }
-            }
-
-            // Track requests for our stuff
-            g_signals.Inventory(inv.hash);
-
-            if (pfrom->nSendSize > (SendBufferSize() * 2)) {
-                Misbehaving(pfrom->GetId(), 50);
-                return error("send buffer size() = %u", pfrom->nSendSize);
-            }
-        }
-
-        if (!vToFetch.empty())
-            pfrom->PushMessage("getdata", vToFetch);
-    }
-
-
-    else if (strCommand == "getdata")
-    {
-        vector<CInv> vInv;
-        vRecv >> vInv;
-        if (vInv.size() > MAX_INV_SZ)
-        {
-            Misbehaving(pfrom->GetId(), 20);
-            return error("message getdata size() = %u", vInv.size());
-        }
-
-        if (fDebug || (vInv.size() != 1))
-            LogPrint("net", "received getdata (%u invsz) peer=%d\n", vInv.size(), pfrom->id);
-
-        if ((fDebug && vInv.size() > 0) || (vInv.size() == 1))
-            LogPrint("net", "received getdata for: %s peer=%d\n", vInv[0].ToString(), pfrom->id);
-
-        pfrom->vRecvGetData.insert(pfrom->vRecvGetData.end(), vInv.begin(), vInv.end());
-        ProcessGetData(pfrom);
-    }
-
-
-    else if (strCommand == "getblocks")
-    {
-        CBlockLocator locator;
-        uint256 hashStop;
-        vRecv >> locator >> hashStop;
-
-        LOCK(cs_main);
-
-        // Find the last block the caller has in the main chain
-        CBlockIndex* pindex = FindForkInGlobalIndex(chainActive, locator);
-
-        // Send the rest of the chain
-        if (pindex)
-            pindex = chainActive.Next(pindex);
-        int nLimit = 500;
-        LogPrint("net", "getblocks %d to %s limit %d from peer=%d\n", (pindex ? pindex->nHeight : -1), hashStop==uint256(0) ? "end" : hashStop.ToString(), nLimit, pfrom->id);
-        for (; pindex; pindex = chainActive.Next(pindex))
-        {
-            if (pindex->GetBlockHash() == hashStop)
-            {
-                LogPrint("net", "  getblocks stopping at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
-                break;
-            }
-            pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
-            if (--nLimit <= 0)
-            {
-                // When this block is requested, we'll send an inv that'll make them
-                // getblocks the next batch of inventory.
-                LogPrint("net", "  getblocks stopping at limit %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
-                pfrom->hashContinue = pindex->GetBlockHash();
-                break;
-            }
-        }
-    }
-
-
-    else if (strCommand == "getheaders")
-    {
-        CBlockLocator locator;
-        uint256 hashStop;
-        vRecv >> locator >> hashStop;
-
-        LOCK(cs_main);
-
-        CBlockIndex* pindex = NULL;
-        if (locator.IsNull())
-        {
-            // If locator is null, return the hashStop block
-            BlockMap::iterator mi = mapBlockIndex.find(hashStop);
-            if (mi == mapBlockIndex.end())
-                return true;
-            pindex = (*mi).second;
-        }
-        else
-        {
-            // Find the last block the caller has in the main chain
-            pindex = FindForkInGlobalIndex(chainActive, locator);
-            if (pindex)
-                pindex = chainActive.Next(pindex);
-        }
-
-        // we must use CBlocks, as CBlockHeaders won't include the 0x00 nTx count at the end
-        vector<CBlock> vHeaders;
-        int nLimit = MAX_HEADERS_RESULTS;
-        LogPrint("net", "getheaders %d to %s from peer=%d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString(), pfrom->id);
-        for (; pindex; pindex = chainActive.Next(pindex))
-        {
-            vHeaders.push_back(pindex->GetBlockHeader());
-            if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
-                break;
-        }
-        pfrom->PushMessage("headers", vHeaders);
-    }
-
-
-    else if (strCommand == "tx")
-    {
-        vector<uint256> vWorkQueue;
-        vector<uint256> vEraseQueue;
-        CTransaction tx;
-        vRecv >> tx;
-
-        CInv inv(MSG_TX, tx.GetHash());
-        pfrom->AddInventoryKnown(inv);
-
-        LOCK(cs_main);
-
-        bool fMissingInputs = false;
-        CValidationState state;
-
-        mapAlreadyAskedFor.erase(inv);
-
-        if (AcceptToMemoryPool(mempool, state, tx, true, &fMissingInputs))
-        {
-            mempool.check(pcoinsTip);
-            RelayTransaction(tx);
-            vWorkQueue.push_back(inv.hash);
-            vEraseQueue.push_back(inv.hash);
-
-            LogPrint("mempool", "AcceptToMemoryPool: peer=%d %s : accepted %s (poolsz %u)\n",
-                pfrom->id, pfrom->cleanSubVer,
-                tx.GetHash().ToString(),
-                mempool.mapTx.size());
-
-            // Recursively process any orphan transactions that depended on this one
-            set<NodeId> setMisbehaving;
-            for (unsigned int i = 0; i < vWorkQueue.size(); i++)
-            {
-                map<uint256, set<uint256> >::iterator itByPrev = mapOrphanTransactionsByPrev.find(vWorkQueue[i]);
-                if (itByPrev == mapOrphanTransactionsByPrev.end())
-                    continue;
-                for (set<uint256>::iterator mi = itByPrev->second.begin();
-                     mi != itByPrev->second.end();
-                     ++mi)
-                {
-                    const uint256& orphanHash = *mi;
-                    const CTransaction& orphanTx = mapOrphanTransactions[orphanHash].tx;
-                    NodeId fromPeer = mapOrphanTransactions[orphanHash].fromPeer;
-                    bool fMissingInputs2 = false;
-                    // Use a dummy CValidationState so someone can't setup nodes to counter-DoS based on orphan
-                    // resolution (that is, feeding people an invalid transaction based on LegitTxX in order to get
-                    // anyone relaying LegitTxX banned)
-                    CValidationState stateDummy;
-
-                    vEraseQueue.push_back(orphanHash);
-
-                    if (setMisbehaving.count(fromPeer))
-                        continue;
-                    if (AcceptToMemoryPool(mempool, stateDummy, orphanTx, true, &fMissingInputs2))
-                    {
-                        LogPrint("mempool", "   accepted orphan tx %s\n", orphanHash.ToString());
-                        RelayTransaction(orphanTx);
-                        vWorkQueue.push_back(orphanHash);
-                    }
-                    else if (!fMissingInputs2)
-                    {
-                        int nDos = 0;
-                        if (stateDummy.IsInvalid(nDos) && nDos > 0)
-                        {
-                            // Punish peer that gave us an invalid orphan tx
-                            Misbehaving(fromPeer, nDos);
-                            setMisbehaving.insert(fromPeer);
-                            LogPrint("mempool", "   invalid orphan tx %s\n", orphanHash.ToString());
-                        }
-                        // too-little-fee orphan
-                        LogPrint("mempool", "   removed orphan tx %s\n", orphanHash.ToString());
-                    }
-                    mempool.check(pcoinsTip);
-                }
-            }
-
-            BOOST_FOREACH(uint256 hash, vEraseQueue)
-                EraseOrphanTx(hash);
-        }
-        else if (fMissingInputs)
-        {
-            AddOrphanTx(tx, pfrom->GetId());
-
-            // DoS prevention: do not allow mapOrphanTransactions to grow unbounded
-            unsigned int nMaxOrphanTx = (unsigned int)std::max((int64_t)0, GetArg("-maxorphantx", DEFAULT_MAX_ORPHAN_TRANSACTIONS));
-            unsigned int nEvicted = LimitOrphanTxSize(nMaxOrphanTx);
-            if (nEvicted > 0)
-                LogPrint("mempool", "mapOrphan overflow, removed %u tx\n", nEvicted);
-        } else if (pfrom->fWhitelisted) {
-            // Always relay transactions received from whitelisted peers, even
-            // if they are already in the mempool (allowing the node to function
-            // as a gateway for nodes hidden behind it).
-            RelayTransaction(tx);
-        }
-        int nDoS = 0;
-        if (state.IsInvalid(nDoS))
-        {
-            LogPrint("mempool", "%s from peer=%d %s was not accepted into the memory pool: %s\n", tx.GetHash().ToString(),
-                pfrom->id, pfrom->cleanSubVer,
-                state.GetRejectReason());
-            pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
-                               state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
-            if (nDoS > 0)
-                Misbehaving(pfrom->GetId(), nDoS);
-        }
-    }
-
-
-    else if (strCommand == "headers" && !fImporting && !fReindex) // Ignore headers received while importing
-    {
-        std::vector<CBlockHeader> headers;
-
-        // Bypass the normal CBlock deserialization, as we don't want to risk deserializing 2000 full blocks.
-        unsigned int nCount = ReadCompactSize(vRecv);
-        if (nCount > MAX_HEADERS_RESULTS) {
-            Misbehaving(pfrom->GetId(), 20);
-            return error("headers message size = %u", nCount);
-        }
-        headers.resize(nCount);
-        for (unsigned int n = 0; n < nCount; n++) {
-            vRecv >> headers[n];
-            ReadCompactSize(vRecv); // ignore tx count; assume it is 0.
-        }
-
-        LOCK(cs_main);
-
-        if (nCount == 0) {
-            // Nothing interesting. Stop asking this peers for more headers.
-            return true;
-        }
-
-        CBlockIndex *pindexLast = NULL;
-        BOOST_FOREACH(const CBlockHeader& header, headers) {
-            CValidationState state;
-            if (pindexLast != NULL && header.hashPrevBlock != pindexLast->GetBlockHash()) {
-                Misbehaving(pfrom->GetId(), 20);
-                return error("non-continuous headers sequence");
-            }
-            if (!AcceptBlockHeader(header, state, &pindexLast)) {
-                int nDoS;
-                if (state.IsInvalid(nDoS)) {
-                    if (nDoS > 0)
-                        Misbehaving(pfrom->GetId(), nDoS);
-                    return error("invalid header received");
-                }
-            }
-        }
-
-        if (pindexLast)
-            UpdateBlockAvailability(pfrom->GetId(), pindexLast->GetBlockHash());
-
-        if (nCount == MAX_HEADERS_RESULTS && pindexLast) {
-            // Headers message had its maximum size; the peer may have more headers.
-            // TODO: optimize: if pindexLast is an ancestor of chainActive.Tip or pindexBestHeader, continue
-            // from there instead.
-            LogPrint("net", "more getheaders (%d) to end to peer=%d (startheight:%d)\n", pindexLast->nHeight, pfrom->id, pfrom->nStartingHeight);
-            pfrom->PushMessage("getheaders", chainActive.GetLocator(pindexLast), uint256(0));
-        }
-
-        CheckBlockIndex();
-    }
-
-    else if (strCommand == "block" && !fImporting && !fReindex) // Ignore blocks received while importing
-    {
-        CBlock block;
-        vRecv >> block;
-
-        CInv inv(MSG_BLOCK, block.GetHash());
-        LogPrint("net", "received block %s peer=%d\n", inv.hash.ToString(), pfrom->id);
-
-        pfrom->AddInventoryKnown(inv);
-
-        CValidationState state;
-        ProcessNewBlock(state, pfrom, &block);
-        int nDoS;
-        if (state.IsInvalid(nDoS)) {
-            pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
-                               state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
-            if (nDoS > 0) {
-                LOCK(cs_main);
-                Misbehaving(pfrom->GetId(), nDoS);
-            }
-        }
-
-    }
-
-
-    // This asymmetric behavior for inbound and outbound connections was introduced
-    // to prevent a fingerprinting attack: an attacker can send specific fake addresses
-    // to users' AddrMan and later request them by sending getaddr messages.
-    // Making users (which are behind NAT and can only make outgoing connections) ignore
-    // getaddr message mitigates the attack.
-    else if ((strCommand == "getaddr") && (pfrom->fInbound))
-    {
-        pfrom->vAddrToSend.clear();
-        vector<CAddress> vAddr = addrman.GetAddr();
-        BOOST_FOREACH(const CAddress &addr, vAddr)
-            pfrom->PushAddress(addr);
-    }
-
-
-    else if (strCommand == "mempool")
-    {
-        LOCK2(cs_main, pfrom->cs_filter);
-
-        std::vector<uint256> vtxid;
-        mempool.queryHashes(vtxid);
-        vector<CInv> vInv;
-        BOOST_FOREACH(uint256& hash, vtxid) {
-            CInv inv(MSG_TX, hash);
-            CTransaction tx;
-            bool fInMemPool = mempool.lookup(hash, tx);
-            if (!fInMemPool) continue; // another thread removed since queryHashes, maybe...
-            if ((pfrom->pfilter && pfrom->pfilter->IsRelevantAndUpdate(tx)) ||
-               (!pfrom->pfilter))
-                vInv.push_back(inv);
-            if (vInv.size() == MAX_INV_SZ) {
-                pfrom->PushMessage("inv", vInv);
-                vInv.clear();
-            }
-        }
-        if (vInv.size() > 0)
-            pfrom->PushMessage("inv", vInv);
-    }
-
-
-    else if (strCommand == "ping")
-    {
-        if (pfrom->nVersion > BIP0031_VERSION)
-        {
-            uint64_t nonce = 0;
-            vRecv >> nonce;
-            // Echo the message back with the nonce. This allows for two useful features:
-            //
-            // 1) A remote node can quickly check if the connection is operational
-            // 2) Remote nodes can measure the latency of the network thread. If this node
-            //    is overloaded it won't respond to pings quickly and the remote node can
-            //    avoid sending us more work, like chain download requests.
-            //
-            // The nonce stops the remote getting confused between different pings: without
-            // it, if the remote node sends a ping once per second and this node takes 5
-            // seconds to respond to each, the 5th ping the remote sends would appear to
-            // return very quickly.
-            pfrom->PushMessage("pong", nonce);
-        }
-    }
-
-
-    else if (strCommand == "pong")
-    {
-        int64_t pingUsecEnd = nTimeReceived;
-        uint64_t nonce = 0;
-        size_t nAvail = vRecv.in_avail();
-        bool bPingFinished = false;
-        std::string sProblem;
-
-        if (nAvail >= sizeof(nonce)) {
-            vRecv >> nonce;
-
-            // Only process pong message if there is an outstanding ping (old ping without nonce should never pong)
-            if (pfrom->nPingNonceSent != 0) {
-                if (nonce == pfrom->nPingNonceSent) {
-                    // Matching pong received, this ping is no longer outstanding
-                    bPingFinished = true;
-                    int64_t pingUsecTime = pingUsecEnd - pfrom->nPingUsecStart;
-                    if (pingUsecTime > 0) {
-                        // Successful ping time measurement, replace previous
-                        pfrom->nPingUsecTime = pingUsecTime;
-                    } else {
-                        // This should never happen
-                        sProblem = "Timing mishap";
-                    }
-                } else {
-                    // Nonce mismatches are normal when pings are overlapping
-                    sProblem = "Nonce mismatch";
-                    if (nonce == 0) {
-                        // This is most likely a bug in another implementation somewhere, cancel this ping
-                        bPingFinished = true;
-                        sProblem = "Nonce zero";
-                    }
-                }
-            } else {
-                sProblem = "Unsolicited pong without ping";
-            }
-        } else {
-            // This is most likely a bug in another implementation somewhere, cancel this ping
-            bPingFinished = true;
-            sProblem = "Short payload";
-        }
-
-        if (!(sProblem.empty())) {
-            LogPrint("net", "pong peer=%d %s: %s, %x expected, %x received, %u bytes\n",
-                pfrom->id,
-                pfrom->cleanSubVer,
-                sProblem,
-                pfrom->nPingNonceSent,
-                nonce,
-                nAvail);
-        }
-        if (bPingFinished) {
-            pfrom->nPingNonceSent = 0;
-        }
-    }
-
-
-    else if (fAlerts && strCommand == "alert")
-    {
-        CAlert alert;
-        vRecv >> alert;
-
-        uint256 alertHash = alert.GetHash();
-        if (pfrom->setKnown.count(alertHash) == 0)
-        {
-            if (alert.ProcessAlert())
-            {
-                // Relay
-                pfrom->setKnown.insert(alertHash);
-                {
-                    LOCK(cs_vNodes);
-                    BOOST_FOREACH(CNode* pnode, vNodes)
-                        alert.RelayTo(pnode);
-                }
-            }
-            else {
-                // Small DoS penalty so peers that send us lots of
-                // duplicate/expired/invalid-signature/whatever alerts
-                // eventually get banned.
-                // This isn't a Misbehaving(100) (immediate ban) because the
-                // peer might be an older or different implementation with
-                // a different signature key, etc.
-                Misbehaving(pfrom->GetId(), 10);
-            }
-        }
-    }
-
-
-    else if (strCommand == "filterload")
-    {
-        CBloomFilter filter;
-        vRecv >> filter;
-
-        if (!filter.IsWithinSizeConstraints())
-            // There is no excuse for sending a too-large filter
-            Misbehaving(pfrom->GetId(), 100);
-        else
-        {
-            LOCK(pfrom->cs_filter);
-            delete pfrom->pfilter;
-            pfrom->pfilter = new CBloomFilter(filter);
-            pfrom->pfilter->UpdateEmptyFull();
-        }
-        pfrom->fRelayTxes = true;
-    }
-
-
-    else if (strCommand == "filteradd")
-    {
-        vector<unsigned char> vData;
-        vRecv >> vData;
-
-        // Nodes must NEVER send a data item > 520 bytes (the max size for a script data object,
-        // and thus, the maximum size any matched object can have) in a filteradd message
-        if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE)
-        {
-            Misbehaving(pfrom->GetId(), 100);
-        } else {
-            LOCK(pfrom->cs_filter);
-            if (pfrom->pfilter)
-                pfrom->pfilter->insert(vData);
-            else
-                Misbehaving(pfrom->GetId(), 100);
-        }
-    }
-
-
-    else if (strCommand == "filterclear")
-    {
-        LOCK(pfrom->cs_filter);
-        delete pfrom->pfilter;
-        pfrom->pfilter = new CBloomFilter();
-        pfrom->fRelayTxes = true;
-    }
-
-
-    else if (strCommand == "reject")
-    {
-        if (fDebug) {
-            try {
-                string strMsg; unsigned char ccode; string strReason;
-                vRecv >> LIMITED_STRING(strMsg, CMessageHeader::COMMAND_SIZE) >> ccode >> LIMITED_STRING(strReason, MAX_REJECT_MESSAGE_LENGTH);
-
-                ostringstream ss;
-                ss << strMsg << " code " << itostr(ccode) << ": " << strReason;
-
-                if (strMsg == "block" || strMsg == "tx")
-                {
-                    uint256 hash;
-                    vRecv >> hash;
-                    ss << ": hash " << hash.ToString();
-                }
-                LogPrint("net", "Reject %s\n", SanitizeString(ss.str()));
-            } catch (std::ios_base::failure& e) {
-                // Avoid feedback loops by preventing reject messages from triggering a new reject message.
-                LogPrint("net", "Unparseable reject message received\n");
-            }
-        }
-    }
-
-    else
-    {
-        // Ignore unknown commands for extensibility
-        LogPrint("net", "Unknown command \"%s\" from peer=%d\n", SanitizeString(strCommand), pfrom->id);
-    }
-
-
-
-    return true;
-}
-
-// requires LOCK(cs_vRecvMsg)
-bool ProcessMessages(CNode* pfrom)
-{
-    //if (fDebug)
-    //    LogPrintf("ProcessMessages(%u messages)\n", pfrom->vRecvMsg.size());
-
-    //
-    // Message format
-    //  (4) message start
-    //  (12) command
-    //  (4) size
-    //  (4) checksum
-    //  (x) data
-    //
-    bool fOk = true;
-
-    if (!pfrom->vRecvGetData.empty())
-        ProcessGetData(pfrom);
-
-    // this maintains the order of responses
-    if (!pfrom->vRecvGetData.empty()) return fOk;
-
-    std::deque<CNetMessage>::iterator it = pfrom->vRecvMsg.begin();
-    while (!pfrom->fDisconnect && it != pfrom->vRecvMsg.end()) {
-        // Don't bother if send buffer is too full to respond anyway
-        if (pfrom->nSendSize >= SendBufferSize())
-            break;
-
-        // get next message
-        CNetMessage& msg = *it;
-
-        //if (fDebug)
-        //    LogPrintf("ProcessMessages(message %u msgsz, %u bytes, complete:%s)\n",
-        //            msg.hdr.nMessageSize, msg.vRecv.size(),
-        //            msg.complete() ? "Y" : "N");
-
-        // end, if an incomplete message is found
-        if (!msg.complete())
-            break;
-
-        // at this point, any failure means we can delete the current message
-        it++;
-
-        // Scan for message start
-        if (memcmp(msg.hdr.pchMessageStart, Params().MessageStart(), MESSAGE_START_SIZE) != 0) {
-            LogPrintf("PROCESSMESSAGE: INVALID MESSAGESTART %s peer=%d\n", SanitizeString(msg.hdr.GetCommand()), pfrom->id);
-            fOk = false;
-            break;
-        }
-
-        // Read header
-        CMessageHeader& hdr = msg.hdr;
-        if (!hdr.IsValid())
-        {
-            LogPrintf("PROCESSMESSAGE: ERRORS IN HEADER %s peer=%d\n", SanitizeString(hdr.GetCommand()), pfrom->id);
-            continue;
-        }
-        string strCommand = hdr.GetCommand();
-
-        // Message size
-        unsigned int nMessageSize = hdr.nMessageSize;
-
-        // Checksum
-        CDataStream& vRecv = msg.vRecv;
-        uint256 hash = Hash(vRecv.begin(), vRecv.begin() + nMessageSize);
-        unsigned int nChecksum = 0;
-        memcpy(&nChecksum, &hash, sizeof(nChecksum));
-        if (nChecksum != hdr.nChecksum)
-        {
-            LogPrintf("ProcessMessages(%s, %u bytes): CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
-               SanitizeString(strCommand), nMessageSize, nChecksum, hdr.nChecksum);
-            continue;
-        }
-
-        // Process message
-        bool fRet = false;
-        try
-        {
-            fRet = ProcessMessage(pfrom, strCommand, vRecv, msg.nTime);
-            boost::this_thread::interruption_point();
-        }
-        catch (std::ios_base::failure& e)
-        {
-            pfrom->PushMessage("reject", strCommand, REJECT_MALFORMED, string("error parsing message"));
-            if (strstr(e.what(), "end of data"))
-            {
-                // Allow exceptions from under-length message on vRecv
-                LogPrintf("ProcessMessages(%s, %u bytes): Exception '%s' caught, normally caused by a message being shorter than its stated length\n", SanitizeString(strCommand), nMessageSize, e.what());
-            }
-            else if (strstr(e.what(), "size too large"))
-            {
-                // Allow exceptions from over-long size
-                LogPrintf("ProcessMessages(%s, %u bytes): Exception '%s' caught\n", SanitizeString(strCommand), nMessageSize, e.what());
-            }
-            else
-            {
-                PrintExceptionContinue(&e, "ProcessMessages()");
-            }
-        }
-        catch (boost::thread_interrupted) {
-            throw;
-        }
-        catch (std::exception& e) {
-            PrintExceptionContinue(&e, "ProcessMessages()");
-        } catch (...) {
-            PrintExceptionContinue(NULL, "ProcessMessages()");
-        }
-
-        if (!fRet)
-            LogPrintf("ProcessMessage(%s, %u bytes) FAILED peer=%d\n", SanitizeString(strCommand), nMessageSize, pfrom->id);
-
-        break;
-    }
-
-    // In case the connection got shut down, its receive buffer was wiped
-    if (!pfrom->fDisconnect)
-        pfrom->vRecvMsg.erase(pfrom->vRecvMsg.begin(), it);
-
-    return fOk;
-}
-
-
-bool SendMessages(CNode* pto, bool fSendTrickle)
-{
-    {
-        // Don't send anything until we get their version message
-        if (pto->nVersion == 0)
-            return true;
-
-        //
-        // Message: ping
-        //
-        bool pingSend = false;
-        if (pto->fPingQueued) {
-            // RPC ping request by user
-            pingSend = true;
-        }
-        if (pto->nPingNonceSent == 0 && pto->nPingUsecStart + PING_INTERVAL * 1000000 < GetTimeMicros()) {
-            // Ping automatically sent as a latency probe & keepalive.
-            pingSend = true;
-        }
-        if (pingSend) {
-            uint64_t nonce = 0;
-            while (nonce == 0) {
-                GetRandBytes((unsigned char*)&nonce, sizeof(nonce));
-            }
-            pto->fPingQueued = false;
-            pto->nPingUsecStart = GetTimeMicros();
-            if (pto->nVersion > BIP0031_VERSION) {
-                pto->nPingNonceSent = nonce;
-                pto->PushMessage("ping", nonce);
-            } else {
-                // Peer is too old to support ping command with nonce, pong will never arrive.
-                pto->nPingNonceSent = 0;
-                pto->PushMessage("ping");
-            }
-        }
-
-        TRY_LOCK(cs_main, lockMain); // Acquire cs_main for IsInitialBlockDownload() and CNodeState()
-        if (!lockMain)
-            return true;
-
-        // Address refresh broadcast
-        static int64_t nLastRebroadcast;
-        if (!IsInitialBlockDownload() && (GetTime() - nLastRebroadcast > 24 * 60 * 60))
-        {
-            LOCK(cs_vNodes);
-            BOOST_FOREACH(CNode* pnode, vNodes)
-            {
-                // Periodically clear setAddrKnown to allow refresh broadcasts
-                if (nLastRebroadcast)
-                    pnode->setAddrKnown.clear();
-
-                // Rebroadcast our address
-                AdvertizeLocal(pnode);
-            }
-            if (!vNodes.empty())
-                nLastRebroadcast = GetTime();
-        }
-
-        //
-        // Message: addr
-        //
-        if (fSendTrickle)
-        {
-            vector<CAddress> vAddr;
-            vAddr.reserve(pto->vAddrToSend.size());
-            BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
-            {
-                // returns true if wasn't already contained in the set
-                if (pto->setAddrKnown.insert(addr).second)
-                {
-                    vAddr.push_back(addr);
-                    // receiver rejects addr messages larger than 1000
-                    if (vAddr.size() >= 1000)
-                    {
-                        pto->PushMessage("addr", vAddr);
-                        vAddr.clear();
-                    }
-                }
-            }
-            pto->vAddrToSend.clear();
-            if (!vAddr.empty())
-                pto->PushMessage("addr", vAddr);
-        }
-
-        CNodeState &state = *State(pto->GetId());
-        if (state.fShouldBan) {
-            if (pto->fWhitelisted)
-                LogPrintf("Warning: not punishing whitelisted peer %s!\n", pto->addr.ToString());
-            else {
-                pto->fDisconnect = true;
-                if (pto->addr.IsLocal())
-                    LogPrintf("Warning: not banning local peer %s!\n", pto->addr.ToString());
-                else
-                {
-                    CNode::Ban(pto->addr);
-                }
-            }
-            state.fShouldBan = false;
-        }
-
-        BOOST_FOREACH(const CBlockReject& reject, state.rejects)
-            pto->PushMessage("reject", (string)"block", reject.chRejectCode, reject.strRejectReason, reject.hashBlock);
-        state.rejects.clear();
-
-        // Start block sync
-        if (pindexBestHeader == NULL)
-            pindexBestHeader = chainActive.Tip();
-        bool fFetch = state.fPreferredDownload || (nPreferredDownload == 0 && !pto->fClient && !pto->fOneShot); // Download if this is a nice peer, or we have no nice peers and this one might do.
-        if (!state.fSyncStarted && !pto->fClient && fFetch && !fImporting && !fReindex) {
-            // Only actively request headers from a single peer, unless we're close to today.
-            if (nSyncStarted == 0 || pindexBestHeader->GetBlockTime() > GetAdjustedTime() - 24 * 60 * 60) {
-                state.fSyncStarted = true;
-                nSyncStarted++;
-                CBlockIndex *pindexStart = pindexBestHeader->pprev ? pindexBestHeader->pprev : pindexBestHeader;
-                LogPrint("net", "initial getheaders (%d) to peer=%d (startheight:%d)\n", pindexStart->nHeight, pto->id, pto->nStartingHeight);
-                pto->PushMessage("getheaders", chainActive.GetLocator(pindexStart), uint256(0));
-            }
-        }
-
-        // Resend wallet transactions that haven't gotten in a block yet
-        // Except during reindex, importing and IBD, when old wallet
-        // transactions become unconfirmed and spams other nodes.
-        if (!fReindex && !fImporting && !IsInitialBlockDownload())
-        {
-            g_signals.Broadcast();
-        }
-
-        //
-        // Message: inventory
-        //
-        vector<CInv> vInv;
-        vector<CInv> vInvWait;
-        {
-            LOCK(pto->cs_inventory);
-            vInv.reserve(pto->vInventoryToSend.size());
-            vInvWait.reserve(pto->vInventoryToSend.size());
-            BOOST_FOREACH(const CInv& inv, pto->vInventoryToSend)
-            {
-                if (pto->setInventoryKnown.count(inv))
-                    continue;
-
-                // trickle out tx inv to protect privacy
-                if (inv.type == MSG_TX && !fSendTrickle)
-                {
-                    // 1/4 of tx invs blast to all immediately
-                    static uint256 hashSalt;
-                    if (hashSalt == 0)
-                        hashSalt = GetRandHash();
-                    uint256 hashRand = inv.hash ^ hashSalt;
-                    hashRand = Hash(BEGIN(hashRand), END(hashRand));
-                    bool fTrickleWait = ((hashRand & 3) != 0);
-
-                    if (fTrickleWait)
-                    {
-                        vInvWait.push_back(inv);
-                        continue;
-                    }
-                }
-
-                // returns true if wasn't already contained in the set
-                if (pto->setInventoryKnown.insert(inv).second)
-                {
-                    vInv.push_back(inv);
-                    if (vInv.size() >= 1000)
-                    {
-                        pto->PushMessage("inv", vInv);
-                        vInv.clear();
-                    }
-                }
-            }
-            pto->vInventoryToSend = vInvWait;
-        }
-        if (!vInv.empty())
-            pto->PushMessage("inv", vInv);
-
-        // Detect whether we're stalling
-        int64_t nNow = GetTimeMicros();
-        if (!pto->fDisconnect && state.nStallingSince && state.nStallingSince < nNow - 1000000 * BLOCK_STALLING_TIMEOUT) {
-            // Stalling only triggers when the block download window cannot move. During normal steady state,
-            // the download window should be much larger than the to-be-downloaded set of blocks, so disconnection
-            // should only happen during initial block download.
-            LogPrintf("Peer=%d is stalling block download, disconnecting\n", pto->id);
-            pto->fDisconnect = true;
-        }
-        // In case there is a block that has been in flight from this peer for (2 + 0.5 * N) times the block interval
-        // (with N the number of validated blocks that were in flight at the time it was requested), disconnect due to
-        // timeout. We compensate for in-flight blocks to prevent killing off peers due to our own downstream link
-        // being saturated. We only count validated in-flight blocks so peers can't advertize nonexisting block hashes
-        // to unreasonably increase our timeout.
-        if (!pto->fDisconnect && state.vBlocksInFlight.size() > 0 && state.vBlocksInFlight.front().nTime < nNow - 500000 * Params().TargetSpacing() * (4 + state.vBlocksInFlight.front().nValidatedQueuedBefore)) {
-            LogPrintf("Timeout downloading block %s from peer=%d, disconnecting\n", state.vBlocksInFlight.front().hash.ToString(), pto->id);
-            pto->fDisconnect = true;
-        }
-
-        //
-        // Message: getdata (blocks)
-        //
-        vector<CInv> vGetData;
-        if (!pto->fDisconnect && !pto->fClient && fFetch && state.nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
-            vector<CBlockIndex*> vToDownload;
-            NodeId staller = -1;
-            FindNextBlocksToDownload(pto->GetId(), MAX_BLOCKS_IN_TRANSIT_PER_PEER - state.nBlocksInFlight, vToDownload, staller);
-            BOOST_FOREACH(CBlockIndex *pindex, vToDownload) {
-                vGetData.push_back(CInv(MSG_BLOCK, pindex->GetBlockHash()));
-                MarkBlockAsInFlight(pto->GetId(), pindex->GetBlockHash(), pindex);
-                LogPrint("net", "Requesting block %s (%d) peer=%d\n", pindex->GetBlockHash().ToString(),
-                    pindex->nHeight, pto->id);
-            }
-            if (state.nBlocksInFlight == 0 && staller != -1) {
-                if (State(staller)->nStallingSince == 0) {
-                    State(staller)->nStallingSince = nNow;
-                    LogPrint("net", "Stall started peer=%d\n", staller);
-                }
-            }
-        }
-
-        //
-        // Message: getdata (non-blocks)
-        //
-        while (!pto->fDisconnect && !pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
-        {
-            const CInv& inv = (*pto->mapAskFor.begin()).second;
-            if (!AlreadyHave(inv))
-            {
-                if (fDebug)
-                    LogPrint("net", "Requesting %s peer=%d\n", inv.ToString(), pto->id);
-                vGetData.push_back(inv);
-                if (vGetData.size() >= 1000)
-                {
-                    pto->PushMessage("getdata", vGetData);
-                    vGetData.clear();
-                }
-            }
-            pto->mapAskFor.erase(pto->mapAskFor.begin());
-        }
-        if (!vGetData.empty())
-            pto->PushMessage("getdata", vGetData);
-
-    }
-    return true;
-}
-
-
-bool CBlockUndo::WriteToDisk(CDiskBlockPos &pos, const uint256 &hashBlock)
-{
-    // Open history file to append
-    CAutoFile fileout(OpenUndoFile(pos), SER_DISK, CLIENT_VERSION);
-    if (fileout.IsNull())
-        return error("CBlockUndo::WriteToDisk : OpenUndoFile failed");
-
-    // Write index header
-    unsigned int nSize = fileout.GetSerializeSize(*this);
-    fileout << FLATDATA(Params().MessageStart()) << nSize;
-
-    // Write undo data
-    long fileOutPos = ftell(fileout.Get());
-    if (fileOutPos < 0)
-        return error("CBlockUndo::WriteToDisk : ftell failed");
-    pos.nPos = (unsigned int)fileOutPos;
-    fileout << *this;
-
-    // calculate & write checksum
-    CHashWriter hasher(SER_GETHASH, PROTOCOL_VERSION);
-    hasher << hashBlock;
-    hasher << *this;
-    fileout << hasher.GetHash();
-
-    return true;
-}
-
-bool CBlockUndo::ReadFromDisk(const CDiskBlockPos &pos, const uint256 &hashBlock)
-{
-    // Open history file to read
-    CAutoFile filein(OpenUndoFile(pos, true), SER_DISK, CLIENT_VERSION);
-    if (filein.IsNull())
-        return error("CBlockUndo::ReadFromDisk : OpenBlockFile failed");
-
-    // Read block
-    uint256 hashChecksum;
-    try {
-        filein >> *this;
-        filein >> hashChecksum;
-    }
-    catch (std::exception &e) {
-        return error("%s : Deserialize or I/O error - %s", __func__, e.what());
-    }
-
-    // Verify checksum
-    CHashWriter hasher(SER_GETHASH, PROTOCOL_VERSION);
-    hasher << hashBlock;
-    hasher << *this;
-    if (hashChecksum != hasher.GetHash())
-        return error("CBlockUndo::ReadFromDisk : Checksum mismatch");
-
-    return true;
-}
-
- std::string CBlockFileInfo::ToString() const {
-     return strprintf("CBlockFileInfo(blocks=%u, size=%u, heights=%u...%u, time=%s...%s)", nBlocks, nSize, nHeightFirst, nHeightLast, DateTimeStrFormat("%Y-%m-%d", nTimeFirst), DateTimeStrFormat("%Y-%m-%d", nTimeLast));
- }
-
-
-
-class CMainCleanup
-{
-public:
-    CMainCleanup() {}
-    ~CMainCleanup() {
-        // block headers
-        BlockMap::iterator it1 = mapBlockIndex.begin();
-        for (; it1 != mapBlockIndex.end(); it1++)
-            delete (*it1).second;
-        mapBlockIndex.clear();
-
-        // orphan transactions
-        mapOrphanTransactions.clear();
-        mapOrphanTransactionsByPrev.clear();
-    }
-} instance_of_cmaincleanup;