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diff --git a/src/main.cpp b/src/main.cpp
index df4f5e395..a60e47504 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6946 +1,6945 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 The Bitcoin Core 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 "arith_uint256.h"
#include "blockencodings.h"
#include "chainparams.h"
#include "checkpoints.h"
#include "checkqueue.h"
#include "consensus/consensus.h"
#include "consensus/merkle.h"
#include "consensus/validation.h"
#include "hash.h"
#include "init.h"
#include "merkleblock.h"
#include "net.h"
#include "policy/fees.h"
#include "policy/policy.h"
#include "pow.h"
#include "primitives/block.h"
#include "primitives/transaction.h"
#include "random.h"
#include "script/script.h"
#include "script/sigcache.h"
#include "script/standard.h"
#include "tinyformat.h"
#include "txdb.h"
#include "txmempool.h"
#include "ui_interface.h"
#include "undo.h"
#include "util.h"
#include "utilmoneystr.h"
#include "utilstrencodings.h"
#include "validationinterface.h"
#include "versionbits.h"
#include <atomic>
#include <sstream>
#include <boost/algorithm/string/replace.hpp>
#include <boost/algorithm/string/join.hpp>
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
#include <boost/math/distributions/poisson.hpp>
#include <boost/thread.hpp>
using namespace std;
#if defined(NDEBUG)
# error "Bitcoin 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 fHavePruned = false;
bool fPruneMode = false;
bool fIsBareMultisigStd = DEFAULT_PERMIT_BAREMULTISIG;
bool fRequireStandard = true;
bool fCheckBlockIndex = false;
bool fCheckpointsEnabled = DEFAULT_CHECKPOINTS_ENABLED;
size_t nCoinCacheUsage = 5000 * 300;
uint64_t nPruneTarget = 0;
int64_t nMaxTipAge = DEFAULT_MAX_TIP_AGE;
bool fEnableReplacement = DEFAULT_ENABLE_REPLACEMENT;
CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
CAmount maxTxFee = DEFAULT_TRANSACTION_MAXFEE;
CTxMemPool mempool(::minRelayTxFee);
FeeFilterRounder filterRounder(::minRelayTxFee);
struct IteratorComparator
{
template<typename I>
bool operator()(const I& a, const I& b)
{
return &(*a) < &(*b);
}
};
struct COrphanTx {
CTransaction tx;
NodeId fromPeer;
int64_t nTimeExpire;
};
map<uint256, COrphanTx> mapOrphanTransactions GUARDED_BY(cs_main);
map<COutPoint, set<map<uint256, COrphanTx>::iterator, IteratorComparator>> mapOrphanTransactionsByPrev GUARDED_BY(cs_main);
void EraseOrphansFor(NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
static void CheckBlockIndex(const Consensus::Params& consensusParams);
/** Constant stuff for coinbase transactions we create: */
CScript COINBASE_FLAGS;
const string strMessageMagic = "Bitcoin Signed Message:\n";
static const uint64_t RANDOMIZER_ID_ADDRESS_RELAY = 0x3cac0035b5866b90ULL; // SHA256("main address relay")[0:8]
// 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, and pruning nodes may be
* missing the data for the block.
*/
set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexCandidates;
/** Number of nodes with fSyncStarted. */
int nSyncStarted = 0;
/** All pairs A->B, where A (or one of its ancestors) misses transactions, but B has transactions.
* Pruned nodes may have entries where B is missing data.
*/
multimap<CBlockIndex*, CBlockIndex*> mapBlocksUnlinked;
CCriticalSection cs_LastBlockFile;
std::vector<CBlockFileInfo> vinfoBlockFile;
int nLastBlockFile = 0;
/** Global flag to indicate we should check to see if there are
* block/undo files that should be deleted. Set on startup
* or if we allocate more file space when we're in prune mode
*/
bool fCheckForPruning = false;
/**
* 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. */
int32_t nBlockSequenceId = 1;
/** Decreasing counter (used by subsequent preciousblock calls). */
int32_t nBlockReverseSequenceId = -1;
/** chainwork for the last block that preciousblock has been applied to. */
arith_uint256 nLastPreciousChainwork = 0;
/**
* Sources of received blocks, saved to be able to send them reject
* messages or ban them when processing happens afterwards. Protected by
* cs_main.
*/
map<uint256, NodeId> mapBlockSource;
/**
* Filter for transactions that were recently rejected by
* AcceptToMemoryPool. These are not rerequested until the chain tip
* changes, at which point the entire filter is reset. Protected by
* cs_main.
*
* Without this filter we'd be re-requesting txs from each of our peers,
* increasing bandwidth consumption considerably. For instance, with 100
* peers, half of which relay a tx we don't accept, that might be a 50x
* bandwidth increase. A flooding attacker attempting to roll-over the
* filter using minimum-sized, 60byte, transactions might manage to send
* 1000/sec if we have fast peers, so we pick 120,000 to give our peers a
* two minute window to send invs to us.
*
* Decreasing the false positive rate is fairly cheap, so we pick one in a
* million to make it highly unlikely for users to have issues with this
* filter.
*
* Memory used: 1.3 MB
*/
std::unique_ptr<CRollingBloomFilter> recentRejects;
uint256 hashRecentRejectsChainTip;
/** 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.
bool fValidatedHeaders; //!< Whether this block has validated headers at the time of request.
std::unique_ptr<PartiallyDownloadedBlock> partialBlock; //!< Optional, used for CMPCTBLOCK downloads
};
map<uint256, pair<NodeId, list<QueuedBlock>::iterator> > mapBlocksInFlight;
/** Stack of nodes which we have set to announce using compact blocks */
list<NodeId> lNodesAnnouncingHeaderAndIDs;
/** Number of preferable block download peers. */
int nPreferredDownload = 0;
/** Dirty block index entries. */
set<CBlockIndex*> setDirtyBlockIndex;
/** Dirty block file entries. */
set<int> setDirtyFileInfo;
/** Number of peers from which we're downloading blocks. */
int nPeersWithValidatedDownloads = 0;
/** Relay map, protected by cs_main. */
typedef std::map<uint256, std::shared_ptr<const CTransaction>> MapRelay;
MapRelay mapRelay;
/** Expiration-time ordered list of (expire time, relay map entry) pairs, protected by cs_main). */
std::deque<std::pair<int64_t, MapRelay::iterator>> vRelayExpiration;
} // anon namespace
//////////////////////////////////////////////////////////////////////////////
//
// 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;
//! The best header we have sent our peer.
CBlockIndex *pindexBestHeaderSent;
//! Length of current-streak of unconnecting headers announcements
int nUnconnectingHeaders;
//! 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;
//! When the first entry in vBlocksInFlight started downloading. Don't care when vBlocksInFlight is empty.
int64_t nDownloadingSince;
int nBlocksInFlight;
int nBlocksInFlightValidHeaders;
//! Whether we consider this a preferred download peer.
bool fPreferredDownload;
//! Whether this peer wants invs or headers (when possible) for block announcements.
bool fPreferHeaders;
//! Whether this peer wants invs or cmpctblocks (when possible) for block announcements.
bool fPreferHeaderAndIDs;
/**
* Whether this peer will send us cmpctblocks if we request them.
* This is not used to gate request logic, as we really only care about fSupportsDesiredCmpctVersion,
* but is used as a flag to "lock in" the version of compact blocks (fWantsCmpctWitness) we send.
*/
bool fProvidesHeaderAndIDs;
//! Whether this peer can give us witnesses
bool fHaveWitness;
//! Whether this peer wants witnesses in cmpctblocks/blocktxns
bool fWantsCmpctWitness;
/**
* If we've announced NODE_WITNESS to this peer: whether the peer sends witnesses in cmpctblocks/blocktxns,
* otherwise: whether this peer sends non-witnesses in cmpctblocks/blocktxns.
*/
bool fSupportsDesiredCmpctVersion;
CNodeState() {
fCurrentlyConnected = false;
nMisbehavior = 0;
fShouldBan = false;
pindexBestKnownBlock = NULL;
hashLastUnknownBlock.SetNull();
pindexLastCommonBlock = NULL;
pindexBestHeaderSent = NULL;
nUnconnectingHeaders = 0;
fSyncStarted = false;
nStallingSince = 0;
nDownloadingSince = 0;
nBlocksInFlight = 0;
nBlocksInFlightValidHeaders = 0;
fPreferredDownload = false;
fPreferHeaders = false;
fPreferHeaderAndIDs = false;
fProvidesHeaderAndIDs = false;
fHaveWitness = false;
fWantsCmpctWitness = false;
fSupportsDesiredCmpctVersion = 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;
}
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, bool& fUpdateConnectionTime) {
fUpdateConnectionTime = false;
LOCK(cs_main);
CNodeState *state = State(nodeid);
if (state->fSyncStarted)
nSyncStarted--;
if (state->nMisbehavior == 0 && state->fCurrentlyConnected) {
fUpdateConnectionTime = true;
}
BOOST_FOREACH(const QueuedBlock& entry, state->vBlocksInFlight) {
mapBlocksInFlight.erase(entry.hash);
}
EraseOrphansFor(nodeid);
nPreferredDownload -= state->fPreferredDownload;
nPeersWithValidatedDownloads -= (state->nBlocksInFlightValidHeaders != 0);
assert(nPeersWithValidatedDownloads >= 0);
mapNodeState.erase(nodeid);
if (mapNodeState.empty()) {
// Do a consistency check after the last peer is removed.
assert(mapBlocksInFlight.empty());
assert(nPreferredDownload == 0);
assert(nPeersWithValidatedDownloads == 0);
}
}
// Requires cs_main.
// Returns a bool indicating whether we requested this block.
// Also used if a block was /not/ received and timed out or started with another peer
bool 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);
state->nBlocksInFlightValidHeaders -= itInFlight->second.second->fValidatedHeaders;
if (state->nBlocksInFlightValidHeaders == 0 && itInFlight->second.second->fValidatedHeaders) {
// Last validated block on the queue was received.
nPeersWithValidatedDownloads--;
}
if (state->vBlocksInFlight.begin() == itInFlight->second.second) {
// First block on the queue was received, update the start download time for the next one
state->nDownloadingSince = std::max(state->nDownloadingSince, GetTimeMicros());
}
state->vBlocksInFlight.erase(itInFlight->second.second);
state->nBlocksInFlight--;
state->nStallingSince = 0;
mapBlocksInFlight.erase(itInFlight);
return true;
}
return false;
}
// Requires cs_main.
// returns false, still setting pit, if the block was already in flight from the same peer
// pit will only be valid as long as the same cs_main lock is being held
bool MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, const Consensus::Params& consensusParams, CBlockIndex *pindex = NULL, list<QueuedBlock>::iterator **pit = NULL) {
CNodeState *state = State(nodeid);
assert(state != NULL);
// Short-circuit most stuff in case its from the same node
map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator itInFlight = mapBlocksInFlight.find(hash);
if (itInFlight != mapBlocksInFlight.end() && itInFlight->second.first == nodeid) {
*pit = &itInFlight->second.second;
return false;
}
// Make sure it's not listed somewhere already.
MarkBlockAsReceived(hash);
list<QueuedBlock>::iterator it = state->vBlocksInFlight.insert(state->vBlocksInFlight.end(),
{hash, pindex, pindex != NULL, std::unique_ptr<PartiallyDownloadedBlock>(pit ? new PartiallyDownloadedBlock(&mempool) : NULL)});
state->nBlocksInFlight++;
state->nBlocksInFlightValidHeaders += it->fValidatedHeaders;
if (state->nBlocksInFlight == 1) {
// We're starting a block download (batch) from this peer.
state->nDownloadingSince = GetTimeMicros();
}
if (state->nBlocksInFlightValidHeaders == 1 && pindex != NULL) {
nPeersWithValidatedDownloads++;
}
itInFlight = mapBlocksInFlight.insert(std::make_pair(hash, std::make_pair(nodeid, it))).first;
if (pit)
*pit = &itInFlight->second.second;
return true;
}
/** Check whether the last unknown block a peer advertised is not yet known. */
void ProcessBlockAvailability(NodeId nodeid) {
CNodeState *state = State(nodeid);
assert(state != NULL);
if (!state->hashLastUnknownBlock.IsNull()) {
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.SetNull();
}
}
}
/** 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;
}
}
void MaybeSetPeerAsAnnouncingHeaderAndIDs(const CNodeState* nodestate, CNode* pfrom, CConnman& connman) {
if (!nodestate->fSupportsDesiredCmpctVersion) {
// Never ask from peers who can't provide witnesses.
return;
}
if (nodestate->fProvidesHeaderAndIDs) {
for (std::list<NodeId>::iterator it = lNodesAnnouncingHeaderAndIDs.begin(); it != lNodesAnnouncingHeaderAndIDs.end(); it++) {
if (*it == pfrom->GetId()) {
lNodesAnnouncingHeaderAndIDs.erase(it);
lNodesAnnouncingHeaderAndIDs.push_back(pfrom->GetId());
return;
}
}
bool fAnnounceUsingCMPCTBLOCK = false;
uint64_t nCMPCTBLOCKVersion = (pfrom->GetLocalServices() & NODE_WITNESS) ? 2 : 1;
if (lNodesAnnouncingHeaderAndIDs.size() >= 3) {
// As per BIP152, we only get 3 of our peers to announce
// blocks using compact encodings.
bool found = connman.ForNode(lNodesAnnouncingHeaderAndIDs.front(), [fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion](CNode* pnodeStop){
pnodeStop->PushMessage(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion);
return true;
});
if(found)
lNodesAnnouncingHeaderAndIDs.pop_front();
}
fAnnounceUsingCMPCTBLOCK = true;
pfrom->PushMessage(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion);
lNodesAnnouncingHeaderAndIDs.push_back(pfrom->GetId());
}
}
// Requires cs_main
bool CanDirectFetch(const Consensus::Params &consensusParams)
{
return chainActive.Tip()->GetBlockTime() > GetAdjustedTime() - consensusParams.nPowTargetSpacing * 20;
}
// Requires cs_main
bool PeerHasHeader(CNodeState *state, CBlockIndex *pindex)
{
if (state->pindexBestKnownBlock && pindex == state->pindexBestKnownBlock->GetAncestor(pindex->nHeight))
return true;
if (state->pindexBestHeaderSent && pindex == state->pindexBestHeaderSent->GetAncestor(pindex->nHeight))
return true;
return false;
}
/** 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, const Consensus::Params& consensusParams) {
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 its 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, or if it's
// already part of our chain (and therefore don't need it even if pruned).
BOOST_FOREACH(CBlockIndex* pindex, vToFetch) {
if (!pindex->IsValid(BLOCK_VALID_TREE)) {
// We consider the chain that this peer is on invalid.
return;
}
if (!State(nodeid)->fHaveWitness && IsWitnessEnabled(pindex->pprev, consensusParams)) {
// We wouldn't download this block or its descendants from this peer.
return;
}
if (pindex->nStatus & BLOCK_HAVE_DATA || chainActive.Contains(pindex)) {
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.ProcessMessages.connect(&ProcessMessages);
nodeSignals.SendMessages.connect(&SendMessages);
nodeSignals.InitializeNode.connect(&InitializeNode);
nodeSignals.FinalizeNode.connect(&FinalizeNode);
}
void UnregisterNodeSignals(CNodeSignals& nodeSignals)
{
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;
if (pindex->GetAncestor(chain.Height()) == chain.Tip()) {
return chain.Tip();
}
}
}
return chain.Genesis();
}
CCoinsViewCache *pcoinsTip = NULL;
CBlockTreeDB *pblocktree = NULL;
//////////////////////////////////////////////////////////////////////////////
//
// mapOrphanTransactions
//
bool AddOrphanTx(const CTransaction& tx, NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
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.
// 100 orphans, each of which is at most 99,999 bytes big is
// at most 10 megabytes of orphans and somewhat more byprev index (in the worst case):
unsigned int sz = GetTransactionWeight(tx);
if (sz >= MAX_STANDARD_TX_WEIGHT)
{
LogPrint("mempool", "ignoring large orphan tx (size: %u, hash: %s)\n", sz, hash.ToString());
return false;
}
auto ret = mapOrphanTransactions.emplace(hash, COrphanTx{tx, peer, GetTime() + ORPHAN_TX_EXPIRE_TIME});
assert(ret.second);
BOOST_FOREACH(const CTxIn& txin, tx.vin) {
mapOrphanTransactionsByPrev[txin.prevout].insert(ret.first);
}
LogPrint("mempool", "stored orphan tx %s (mapsz %u outsz %u)\n", hash.ToString(),
mapOrphanTransactions.size(), mapOrphanTransactionsByPrev.size());
return true;
}
int static EraseOrphanTx(uint256 hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
map<uint256, COrphanTx>::iterator it = mapOrphanTransactions.find(hash);
if (it == mapOrphanTransactions.end())
return 0;
BOOST_FOREACH(const CTxIn& txin, it->second.tx.vin)
{
auto itPrev = mapOrphanTransactionsByPrev.find(txin.prevout);
if (itPrev == mapOrphanTransactionsByPrev.end())
continue;
itPrev->second.erase(it);
if (itPrev->second.empty())
mapOrphanTransactionsByPrev.erase(itPrev);
}
mapOrphanTransactions.erase(it);
return 1;
}
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)
{
nErased += EraseOrphanTx(maybeErase->second.tx.GetHash());
}
}
if (nErased > 0) LogPrint("mempool", "Erased %d orphan tx from peer %d\n", nErased, peer);
}
unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
unsigned int nEvicted = 0;
static int64_t nNextSweep;
int64_t nNow = GetTime();
if (nNextSweep <= nNow) {
// Sweep out expired orphan pool entries:
int nErased = 0;
int64_t nMinExpTime = nNow + ORPHAN_TX_EXPIRE_TIME - ORPHAN_TX_EXPIRE_INTERVAL;
map<uint256, COrphanTx>::iterator iter = mapOrphanTransactions.begin();
while (iter != mapOrphanTransactions.end())
{
map<uint256, COrphanTx>::iterator maybeErase = iter++;
if (maybeErase->second.nTimeExpire <= nNow) {
nErased += EraseOrphanTx(maybeErase->second.tx.GetHash());
} else {
nMinExpTime = std::min(maybeErase->second.nTimeExpire, nMinExpTime);
}
}
// Sweep again 5 minutes after the next entry that expires in order to batch the linear scan.
nNextSweep = nMinExpTime + ORPHAN_TX_EXPIRE_INTERVAL;
if (nErased > 0) LogPrint("mempool", "Erased %d orphan tx due to expiration\n", nErased);
}
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 IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime)
{
if (tx.nLockTime == 0)
return true;
if ((int64_t)tx.nLockTime < ((int64_t)tx.nLockTime < LOCKTIME_THRESHOLD ? (int64_t)nBlockHeight : nBlockTime))
return true;
for (const auto& txin : tx.vin) {
if (!(txin.nSequence == CTxIn::SEQUENCE_FINAL))
return false;
}
return true;
}
bool CheckFinalTx(const CTransaction &tx, int flags)
{
AssertLockHeld(cs_main);
// By convention a negative value for flags indicates that the
// current network-enforced consensus rules should be used. In
// a future soft-fork scenario that would mean checking which
// rules would be enforced for the next block and setting the
// appropriate flags. At the present time no soft-forks are
// scheduled, so no flags are set.
flags = std::max(flags, 0);
// CheckFinalTx() uses chainActive.Height()+1 to evaluate
// nLockTime because 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().
const int nBlockHeight = chainActive.Height() + 1;
// BIP113 will require that time-locked transactions have nLockTime set to
// less than the median time of the previous block they're contained in.
// When the next block is created its previous block will be the current
// chain tip, so we use that to calculate the median time passed to
// IsFinalTx() if LOCKTIME_MEDIAN_TIME_PAST is set.
const int64_t nBlockTime = (flags & LOCKTIME_MEDIAN_TIME_PAST)
? chainActive.Tip()->GetMedianTimePast()
: GetAdjustedTime();
return IsFinalTx(tx, nBlockHeight, nBlockTime);
}
/**
* Calculates the block height and previous block's median time past at
* which the transaction will be considered final in the context of BIP 68.
* Also removes from the vector of input heights any entries which did not
* correspond to sequence locked inputs as they do not affect the calculation.
*/
static std::pair<int, int64_t> CalculateSequenceLocks(const CTransaction &tx, int flags, std::vector<int>* prevHeights, const CBlockIndex& block)
{
assert(prevHeights->size() == tx.vin.size());
// Will be set to the equivalent height- and time-based nLockTime
// values that would be necessary to satisfy all relative lock-
// time constraints given our view of block chain history.
// The semantics of nLockTime are the last invalid height/time, so
// use -1 to have the effect of any height or time being valid.
int nMinHeight = -1;
int64_t nMinTime = -1;
// tx.nVersion is signed integer so requires cast to unsigned otherwise
// we would be doing a signed comparison and half the range of nVersion
// wouldn't support BIP 68.
bool fEnforceBIP68 = static_cast<uint32_t>(tx.nVersion) >= 2
&& flags & LOCKTIME_VERIFY_SEQUENCE;
// Do not enforce sequence numbers as a relative lock time
// unless we have been instructed to
if (!fEnforceBIP68) {
return std::make_pair(nMinHeight, nMinTime);
}
for (size_t txinIndex = 0; txinIndex < tx.vin.size(); txinIndex++) {
const CTxIn& txin = tx.vin[txinIndex];
// Sequence numbers with the most significant bit set are not
// treated as relative lock-times, nor are they given any
// consensus-enforced meaning at this point.
if (txin.nSequence & CTxIn::SEQUENCE_LOCKTIME_DISABLE_FLAG) {
// The height of this input is not relevant for sequence locks
(*prevHeights)[txinIndex] = 0;
continue;
}
int nCoinHeight = (*prevHeights)[txinIndex];
if (txin.nSequence & CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG) {
int64_t nCoinTime = block.GetAncestor(std::max(nCoinHeight-1, 0))->GetMedianTimePast();
// NOTE: Subtract 1 to maintain nLockTime semantics
// BIP 68 relative lock times have the semantics of calculating
// the first block or time at which the transaction would be
// valid. When calculating the effective block time or height
// for the entire transaction, we switch to using the
// semantics of nLockTime which is the last invalid block
// time or height. Thus we subtract 1 from the calculated
// time or height.
// Time-based relative lock-times are measured from the
// smallest allowed timestamp of the block containing the
// txout being spent, which is the median time past of the
// block prior.
nMinTime = std::max(nMinTime, nCoinTime + (int64_t)((txin.nSequence & CTxIn::SEQUENCE_LOCKTIME_MASK) << CTxIn::SEQUENCE_LOCKTIME_GRANULARITY) - 1);
} else {
nMinHeight = std::max(nMinHeight, nCoinHeight + (int)(txin.nSequence & CTxIn::SEQUENCE_LOCKTIME_MASK) - 1);
}
}
return std::make_pair(nMinHeight, nMinTime);
}
static bool EvaluateSequenceLocks(const CBlockIndex& block, std::pair<int, int64_t> lockPair)
{
assert(block.pprev);
int64_t nBlockTime = block.pprev->GetMedianTimePast();
if (lockPair.first >= block.nHeight || lockPair.second >= nBlockTime)
return false;
return true;
}
bool SequenceLocks(const CTransaction &tx, int flags, std::vector<int>* prevHeights, const CBlockIndex& block)
{
return EvaluateSequenceLocks(block, CalculateSequenceLocks(tx, flags, prevHeights, block));
}
bool TestLockPointValidity(const LockPoints* lp)
{
AssertLockHeld(cs_main);
assert(lp);
// If there are relative lock times then the maxInputBlock will be set
// If there are no relative lock times, the LockPoints don't depend on the chain
if (lp->maxInputBlock) {
// Check whether chainActive is an extension of the block at which the LockPoints
// calculation was valid. If not LockPoints are no longer valid
if (!chainActive.Contains(lp->maxInputBlock)) {
return false;
}
}
// LockPoints still valid
return true;
}
bool CheckSequenceLocks(const CTransaction &tx, int flags, LockPoints* lp, bool useExistingLockPoints)
{
AssertLockHeld(cs_main);
AssertLockHeld(mempool.cs);
CBlockIndex* tip = chainActive.Tip();
CBlockIndex index;
index.pprev = tip;
// CheckSequenceLocks() uses chainActive.Height()+1 to evaluate
// height based locks because when SequenceLocks() is called within
// ConnectBlock(), 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 use one more than chainActive.Height()
index.nHeight = tip->nHeight + 1;
std::pair<int, int64_t> lockPair;
if (useExistingLockPoints) {
assert(lp);
lockPair.first = lp->height;
lockPair.second = lp->time;
}
else {
// pcoinsTip contains the UTXO set for chainActive.Tip()
CCoinsViewMemPool viewMemPool(pcoinsTip, mempool);
std::vector<int> prevheights;
prevheights.resize(tx.vin.size());
for (size_t txinIndex = 0; txinIndex < tx.vin.size(); txinIndex++) {
const CTxIn& txin = tx.vin[txinIndex];
CCoins coins;
if (!viewMemPool.GetCoins(txin.prevout.hash, coins)) {
return error("%s: Missing input", __func__);
}
if (coins.nHeight == MEMPOOL_HEIGHT) {
// Assume all mempool transaction confirm in the next block
prevheights[txinIndex] = tip->nHeight + 1;
} else {
prevheights[txinIndex] = coins.nHeight;
}
}
lockPair = CalculateSequenceLocks(tx, flags, &prevheights, index);
if (lp) {
lp->height = lockPair.first;
lp->time = lockPair.second;
// Also store the hash of the block with the highest height of
// all the blocks which have sequence locked prevouts.
// This hash needs to still be on the chain
// for these LockPoint calculations to be valid
// Note: It is impossible to correctly calculate a maxInputBlock
// if any of the sequence locked inputs depend on unconfirmed txs,
// except in the special case where the relative lock time/height
// is 0, which is equivalent to no sequence lock. Since we assume
// input height of tip+1 for mempool txs and test the resulting
// lockPair from CalculateSequenceLocks against tip+1. We know
// EvaluateSequenceLocks will fail if there was a non-zero sequence
// lock on a mempool input, so we can use the return value of
// CheckSequenceLocks to indicate the LockPoints validity
int maxInputHeight = 0;
BOOST_FOREACH(int height, prevheights) {
// Can ignore mempool inputs since we'll fail if they had non-zero locks
if (height != tip->nHeight+1) {
maxInputHeight = std::max(maxInputHeight, height);
}
}
lp->maxInputBlock = tip->GetAncestor(maxInputHeight);
}
}
return EvaluateSequenceLocks(index, lockPair);
}
unsigned int GetLegacySigOpCount(const CTransaction& tx)
{
unsigned int nSigOps = 0;
for (const auto& txin : tx.vin)
{
nSigOps += txin.scriptSig.GetSigOpCount(false);
}
for (const auto& 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;
}
int64_t GetTransactionSigOpCost(const CTransaction& tx, const CCoinsViewCache& inputs, int flags)
{
int64_t nSigOps = GetLegacySigOpCount(tx) * WITNESS_SCALE_FACTOR;
if (tx.IsCoinBase())
return nSigOps;
if (flags & SCRIPT_VERIFY_P2SH) {
nSigOps += GetP2SHSigOpCount(tx, inputs) * WITNESS_SCALE_FACTOR;
}
for (unsigned int i = 0; i < tx.vin.size(); i++)
{
const CTxOut &prevout = inputs.GetOutputFor(tx.vin[i]);
nSigOps += CountWitnessSigOps(tx.vin[i].scriptSig, prevout.scriptPubKey, i < tx.wit.vtxinwit.size() ? &tx.wit.vtxinwit[i].scriptWitness : NULL, flags);
}
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, false, REJECT_INVALID, "bad-txns-vin-empty");
if (tx.vout.empty())
return state.DoS(10, false, REJECT_INVALID, "bad-txns-vout-empty");
// Size limits (this doesn't take the witness into account, as that hasn't been checked for malleability)
if (::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) > MAX_BLOCK_BASE_SIZE)
return state.DoS(100, false, REJECT_INVALID, "bad-txns-oversize");
// Check for negative or overflow output values
CAmount nValueOut = 0;
for (const auto& txout : tx.vout)
{
if (txout.nValue < 0)
return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-negative");
if (txout.nValue > MAX_MONEY)
return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-toolarge");
nValueOut += txout.nValue;
if (!MoneyRange(nValueOut))
return state.DoS(100, false, REJECT_INVALID, "bad-txns-txouttotal-toolarge");
}
// Check for duplicate inputs
set<COutPoint> vInOutPoints;
for (const auto& txin : tx.vin)
{
if (vInOutPoints.count(txin.prevout))
return state.DoS(100, false, 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, false, REJECT_INVALID, "bad-cb-length");
}
else
{
for (const auto& txin : tx.vin)
if (txin.prevout.IsNull())
return state.DoS(10, false, REJECT_INVALID, "bad-txns-prevout-null");
}
return true;
}
void LimitMempoolSize(CTxMemPool& pool, size_t limit, unsigned long age) {
int expired = pool.Expire(GetTime() - age);
if (expired != 0)
LogPrint("mempool", "Expired %i transactions from the memory pool\n", expired);
std::vector<uint256> vNoSpendsRemaining;
pool.TrimToSize(limit, &vNoSpendsRemaining);
BOOST_FOREACH(const uint256& removed, vNoSpendsRemaining)
pcoinsTip->Uncache(removed);
}
/** Convert CValidationState to a human-readable message for logging */
std::string FormatStateMessage(const CValidationState &state)
{
return strprintf("%s%s (code %i)",
state.GetRejectReason(),
state.GetDebugMessage().empty() ? "" : ", "+state.GetDebugMessage(),
state.GetRejectCode());
}
bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const CTransaction& tx, bool fLimitFree,
bool* pfMissingInputs, bool fOverrideMempoolLimit, const CAmount& nAbsurdFee,
std::vector<uint256>& vHashTxnToUncache)
{
const uint256 hash = tx.GetHash();
AssertLockHeld(cs_main);
if (pfMissingInputs)
*pfMissingInputs = false;
if (!CheckTransaction(tx, state))
return false; // state filled in by CheckTransaction
// Coinbase is only valid in a block, not as a loose transaction
if (tx.IsCoinBase())
return state.DoS(100, false, REJECT_INVALID, "coinbase");
// Don't relay version 2 transactions until CSV is active, and we can be
// sure that such transactions will be mined (unless we're on
// -testnet/-regtest).
const CChainParams& chainparams = Params();
if (fRequireStandard && tx.nVersion >= 2 && VersionBitsTipState(chainparams.GetConsensus(), Consensus::DEPLOYMENT_CSV) != THRESHOLD_ACTIVE) {
return state.DoS(0, false, REJECT_NONSTANDARD, "premature-version2-tx");
}
// Reject transactions with witness before segregated witness activates (override with -prematurewitness)
bool witnessEnabled = IsWitnessEnabled(chainActive.Tip(), Params().GetConsensus());
if (!GetBoolArg("-prematurewitness",false) && !tx.wit.IsNull() && !witnessEnabled) {
return state.DoS(0, false, REJECT_NONSTANDARD, "no-witness-yet", true);
}
// Rather not work on nonstandard transactions (unless -testnet/-regtest)
string reason;
if (fRequireStandard && !IsStandardTx(tx, reason, witnessEnabled))
return state.DoS(0, false, REJECT_NONSTANDARD, reason);
// Only accept nLockTime-using transactions that can be mined in the next
// block; we don't want our mempool filled up with transactions that can't
// be mined yet.
if (!CheckFinalTx(tx, STANDARD_LOCKTIME_VERIFY_FLAGS))
return state.DoS(0, false, REJECT_NONSTANDARD, "non-final");
// is it already in the memory pool?
if (pool.exists(hash))
return state.Invalid(false, REJECT_ALREADY_KNOWN, "txn-already-in-mempool");
// Check for conflicts with in-memory transactions
set<uint256> setConflicts;
{
LOCK(pool.cs); // protect pool.mapNextTx
BOOST_FOREACH(const CTxIn &txin, tx.vin)
{
auto itConflicting = pool.mapNextTx.find(txin.prevout);
if (itConflicting != pool.mapNextTx.end())
{
const CTransaction *ptxConflicting = itConflicting->second;
if (!setConflicts.count(ptxConflicting->GetHash()))
{
// Allow opt-out of transaction replacement by setting
// nSequence >= maxint-1 on all inputs.
//
// maxint-1 is picked to still allow use of nLockTime by
// non-replaceable transactions. All inputs rather than just one
// is for the sake of multi-party protocols, where we don't
// want a single party to be able to disable replacement.
//
// The opt-out ignores descendants as anyone relying on
// first-seen mempool behavior should be checking all
// unconfirmed ancestors anyway; doing otherwise is hopelessly
// insecure.
bool fReplacementOptOut = true;
if (fEnableReplacement)
{
BOOST_FOREACH(const CTxIn &_txin, ptxConflicting->vin)
{
if (_txin.nSequence < std::numeric_limits<unsigned int>::max()-1)
{
fReplacementOptOut = false;
break;
}
}
}
if (fReplacementOptOut)
return state.Invalid(false, REJECT_CONFLICT, "txn-mempool-conflict");
setConflicts.insert(ptxConflicting->GetHash());
}
}
}
}
{
CCoinsView dummy;
CCoinsViewCache view(&dummy);
CAmount nValueIn = 0;
LockPoints lp;
{
LOCK(pool.cs);
CCoinsViewMemPool viewMemPool(pcoinsTip, pool);
view.SetBackend(viewMemPool);
// do we already have it?
bool fHadTxInCache = pcoinsTip->HaveCoinsInCache(hash);
if (view.HaveCoins(hash)) {
if (!fHadTxInCache)
vHashTxnToUncache.push_back(hash);
return state.Invalid(false, REJECT_ALREADY_KNOWN, "txn-already-known");
}
// do all inputs exist?
// Note that this does not check for the presence of actual outputs (see the next check for that),
// and only helps with filling in pfMissingInputs (to determine missing vs spent).
BOOST_FOREACH(const CTxIn txin, tx.vin) {
if (!pcoinsTip->HaveCoinsInCache(txin.prevout.hash))
vHashTxnToUncache.push_back(txin.prevout.hash);
if (!view.HaveCoins(txin.prevout.hash)) {
if (pfMissingInputs)
*pfMissingInputs = true;
return false; // fMissingInputs and !state.IsInvalid() is used to detect this condition, don't set state.Invalid()
}
}
// are the actual inputs available?
if (!view.HaveInputs(tx))
return state.Invalid(false, 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);
// Only accept BIP68 sequence locked transactions that can be mined in the next
// block; we don't want our mempool filled up with transactions that can't
// be mined yet.
// Must keep pool.cs for this unless we change CheckSequenceLocks to take a
// CoinsViewCache instead of create its own
if (!CheckSequenceLocks(tx, STANDARD_LOCKTIME_VERIFY_FLAGS, &lp))
return state.DoS(0, false, REJECT_NONSTANDARD, "non-BIP68-final");
}
// Check for non-standard pay-to-script-hash in inputs
if (fRequireStandard && !AreInputsStandard(tx, view))
return state.Invalid(false, REJECT_NONSTANDARD, "bad-txns-nonstandard-inputs");
// Check for non-standard witness in P2WSH
if (!tx.wit.IsNull() && fRequireStandard && !IsWitnessStandard(tx, view))
return state.DoS(0, false, REJECT_NONSTANDARD, "bad-witness-nonstandard", true);
int64_t nSigOpsCost = GetTransactionSigOpCost(tx, view, STANDARD_SCRIPT_VERIFY_FLAGS);
CAmount nValueOut = tx.GetValueOut();
CAmount nFees = nValueIn-nValueOut;
// nModifiedFees includes any fee deltas from PrioritiseTransaction
CAmount nModifiedFees = nFees;
double nPriorityDummy = 0;
pool.ApplyDeltas(hash, nPriorityDummy, nModifiedFees);
CAmount inChainInputValue;
double dPriority = view.GetPriority(tx, chainActive.Height(), inChainInputValue);
// Keep track of transactions that spend a coinbase, which we re-scan
// during reorgs to ensure COINBASE_MATURITY is still met.
bool fSpendsCoinbase = false;
BOOST_FOREACH(const CTxIn &txin, tx.vin) {
const CCoins *coins = view.AccessCoins(txin.prevout.hash);
if (coins->IsCoinBase()) {
fSpendsCoinbase = true;
break;
}
}
CTxMemPoolEntry entry(tx, nFees, GetTime(), dPriority, chainActive.Height(), pool.HasNoInputsOf(tx), inChainInputValue, fSpendsCoinbase, nSigOpsCost, lp);
unsigned int nSize = entry.GetTxSize();
// 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_STANDARD_TX_SIGOPS is less than
// MAX_BLOCK_SIGOPS; we still consider this an invalid rather than
// merely non-standard transaction.
if (nSigOpsCost > MAX_STANDARD_TX_SIGOPS_COST)
return state.DoS(0, false, REJECT_NONSTANDARD, "bad-txns-too-many-sigops", false,
strprintf("%d", nSigOpsCost));
CAmount mempoolRejectFee = pool.GetMinFee(GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFee(nSize);
if (mempoolRejectFee > 0 && nModifiedFees < mempoolRejectFee) {
return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "mempool min fee not met", false, strprintf("%d < %d", nFees, mempoolRejectFee));
} else if (GetBoolArg("-relaypriority", DEFAULT_RELAYPRIORITY) && nModifiedFees < ::minRelayTxFee.GetFee(nSize) && !AllowFree(entry.GetPriority(chainActive.Height() + 1))) {
// Require that free transactions have sufficient priority to be mined in the next block.
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 && nModifiedFees < ::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 + nSize >= GetArg("-limitfreerelay", DEFAULT_LIMITFREERELAY) * 10 * 1000)
return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "rate limited free transaction");
LogPrint("mempool", "Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
dFreeCount += nSize;
}
if (nAbsurdFee && nFees > nAbsurdFee)
return state.Invalid(false,
REJECT_HIGHFEE, "absurdly-high-fee",
strprintf("%d > %d", nFees, nAbsurdFee));
// Calculate in-mempool ancestors, up to a limit.
CTxMemPool::setEntries setAncestors;
size_t nLimitAncestors = GetArg("-limitancestorcount", DEFAULT_ANCESTOR_LIMIT);
size_t nLimitAncestorSize = GetArg("-limitancestorsize", DEFAULT_ANCESTOR_SIZE_LIMIT)*1000;
size_t nLimitDescendants = GetArg("-limitdescendantcount", DEFAULT_DESCENDANT_LIMIT);
size_t nLimitDescendantSize = GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT)*1000;
std::string errString;
if (!pool.CalculateMemPoolAncestors(entry, setAncestors, nLimitAncestors, nLimitAncestorSize, nLimitDescendants, nLimitDescendantSize, errString)) {
return state.DoS(0, false, REJECT_NONSTANDARD, "too-long-mempool-chain", false, errString);
}
// A transaction that spends outputs that would be replaced by it is invalid. Now
// that we have the set of all ancestors we can detect this
// pathological case by making sure setConflicts and setAncestors don't
// intersect.
BOOST_FOREACH(CTxMemPool::txiter ancestorIt, setAncestors)
{
const uint256 &hashAncestor = ancestorIt->GetTx().GetHash();
if (setConflicts.count(hashAncestor))
{
return state.DoS(10, false,
REJECT_INVALID, "bad-txns-spends-conflicting-tx", false,
strprintf("%s spends conflicting transaction %s",
hash.ToString(),
hashAncestor.ToString()));
}
}
// Check if it's economically rational to mine this transaction rather
// than the ones it replaces.
CAmount nConflictingFees = 0;
size_t nConflictingSize = 0;
uint64_t nConflictingCount = 0;
CTxMemPool::setEntries allConflicting;
// If we don't hold the lock allConflicting might be incomplete; the
// subsequent RemoveStaged() and addUnchecked() calls don't guarantee
// mempool consistency for us.
LOCK(pool.cs);
if (setConflicts.size())
{
CFeeRate newFeeRate(nModifiedFees, nSize);
set<uint256> setConflictsParents;
const int maxDescendantsToVisit = 100;
CTxMemPool::setEntries setIterConflicting;
BOOST_FOREACH(const uint256 &hashConflicting, setConflicts)
{
CTxMemPool::txiter mi = pool.mapTx.find(hashConflicting);
if (mi == pool.mapTx.end())
continue;
// Save these to avoid repeated lookups
setIterConflicting.insert(mi);
// Don't allow the replacement to reduce the feerate of the
// mempool.
//
// We usually don't want to accept replacements with lower
// feerates than what they replaced as that would lower the
// feerate of the next block. Requiring that the feerate always
// be increased is also an easy-to-reason about way to prevent
// DoS attacks via replacements.
//
// The mining code doesn't (currently) take children into
// account (CPFP) so we only consider the feerates of
// transactions being directly replaced, not their indirect
// descendants. While that does mean high feerate children are
// ignored when deciding whether or not to replace, we do
// require the replacement to pay more overall fees too,
// mitigating most cases.
CFeeRate oldFeeRate(mi->GetModifiedFee(), mi->GetTxSize());
if (newFeeRate <= oldFeeRate)
{
return state.DoS(0, false,
REJECT_INSUFFICIENTFEE, "insufficient fee", false,
strprintf("rejecting replacement %s; new feerate %s <= old feerate %s",
hash.ToString(),
newFeeRate.ToString(),
oldFeeRate.ToString()));
}
BOOST_FOREACH(const CTxIn &txin, mi->GetTx().vin)
{
setConflictsParents.insert(txin.prevout.hash);
}
nConflictingCount += mi->GetCountWithDescendants();
}
// This potentially overestimates the number of actual descendants
// but we just want to be conservative to avoid doing too much
// work.
if (nConflictingCount <= maxDescendantsToVisit) {
// If not too many to replace, then calculate the set of
// transactions that would have to be evicted
BOOST_FOREACH(CTxMemPool::txiter it, setIterConflicting) {
pool.CalculateDescendants(it, allConflicting);
}
BOOST_FOREACH(CTxMemPool::txiter it, allConflicting) {
nConflictingFees += it->GetModifiedFee();
nConflictingSize += it->GetTxSize();
}
} else {
return state.DoS(0, false,
REJECT_NONSTANDARD, "too many potential replacements", false,
strprintf("rejecting replacement %s; too many potential replacements (%d > %d)\n",
hash.ToString(),
nConflictingCount,
maxDescendantsToVisit));
}
for (unsigned int j = 0; j < tx.vin.size(); j++)
{
// We don't want to accept replacements that require low
// feerate junk to be mined first. Ideally we'd keep track of
// the ancestor feerates and make the decision based on that,
// but for now requiring all new inputs to be confirmed works.
if (!setConflictsParents.count(tx.vin[j].prevout.hash))
{
// Rather than check the UTXO set - potentially expensive -
// it's cheaper to just check if the new input refers to a
// tx that's in the mempool.
if (pool.mapTx.find(tx.vin[j].prevout.hash) != pool.mapTx.end())
return state.DoS(0, false,
REJECT_NONSTANDARD, "replacement-adds-unconfirmed", false,
strprintf("replacement %s adds unconfirmed input, idx %d",
hash.ToString(), j));
}
}
// The replacement must pay greater fees than the transactions it
// replaces - if we did the bandwidth used by those conflicting
// transactions would not be paid for.
if (nModifiedFees < nConflictingFees)
{
return state.DoS(0, false,
REJECT_INSUFFICIENTFEE, "insufficient fee", false,
strprintf("rejecting replacement %s, less fees than conflicting txs; %s < %s",
hash.ToString(), FormatMoney(nModifiedFees), FormatMoney(nConflictingFees)));
}
// Finally in addition to paying more fees than the conflicts the
// new transaction must pay for its own bandwidth.
CAmount nDeltaFees = nModifiedFees - nConflictingFees;
if (nDeltaFees < ::minRelayTxFee.GetFee(nSize))
{
return state.DoS(0, false,
REJECT_INSUFFICIENTFEE, "insufficient fee", false,
strprintf("rejecting replacement %s, not enough additional fees to relay; %s < %s",
hash.ToString(),
FormatMoney(nDeltaFees),
FormatMoney(::minRelayTxFee.GetFee(nSize))));
}
}
unsigned int scriptVerifyFlags = STANDARD_SCRIPT_VERIFY_FLAGS;
if (!Params().RequireStandard()) {
scriptVerifyFlags = GetArg("-promiscuousmempoolflags", scriptVerifyFlags);
}
// Check against previous transactions
// This is done last to help prevent CPU exhaustion denial-of-service attacks.
PrecomputedTransactionData txdata(tx);
if (!CheckInputs(tx, state, view, true, scriptVerifyFlags, true, txdata)) {
// SCRIPT_VERIFY_CLEANSTACK requires SCRIPT_VERIFY_WITNESS, so we
// need to turn both off, and compare against just turning off CLEANSTACK
// to see if the failure is specifically due to witness validation.
if (tx.wit.IsNull() && CheckInputs(tx, state, view, true, scriptVerifyFlags & ~(SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_CLEANSTACK), true, txdata) &&
!CheckInputs(tx, state, view, true, scriptVerifyFlags & ~SCRIPT_VERIFY_CLEANSTACK, true, txdata)) {
// Only the witness is missing, so the transaction itself may be fine.
state.SetCorruptionPossible();
}
return false;
}
// 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, txdata))
{
return error("%s: BUG! PLEASE REPORT THIS! ConnectInputs failed against MANDATORY but not STANDARD flags %s, %s",
__func__, hash.ToString(), FormatStateMessage(state));
}
// Remove conflicting transactions from the mempool
BOOST_FOREACH(const CTxMemPool::txiter it, allConflicting)
{
LogPrint("mempool", "replacing tx %s with %s for %s BTC additional fees, %d delta bytes\n",
it->GetTx().GetHash().ToString(),
hash.ToString(),
FormatMoney(nModifiedFees - nConflictingFees),
(int)nSize - (int)nConflictingSize);
}
pool.RemoveStaged(allConflicting, false);
// Store transaction in memory
pool.addUnchecked(hash, entry, setAncestors, !IsInitialBlockDownload());
// trim mempool and check if tx was trimmed
if (!fOverrideMempoolLimit) {
LimitMempoolSize(pool, GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000, GetArg("-mempoolexpiry", DEFAULT_MEMPOOL_EXPIRY) * 60 * 60);
if (!pool.exists(hash))
return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "mempool full");
}
}
GetMainSignals().SyncTransaction(tx, NULL, CMainSignals::SYNC_TRANSACTION_NOT_IN_BLOCK);
return true;
}
bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransaction &tx, bool fLimitFree,
bool* pfMissingInputs, bool fOverrideMempoolLimit, const CAmount nAbsurdFee)
{
std::vector<uint256> vHashTxToUncache;
bool res = AcceptToMemoryPoolWorker(pool, state, tx, fLimitFree, pfMissingInputs, fOverrideMempoolLimit, nAbsurdFee, vHashTxToUncache);
if (!res) {
BOOST_FOREACH(const uint256& hashTx, vHashTxToUncache)
pcoinsTip->Uncache(hashTx);
}
return res;
}
/** 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, const Consensus::Params& consensusParams, uint256 &hashBlock, bool fAllowSlow)
{
CBlockIndex *pindexSlow = NULL;
LOCK(cs_main);
std::shared_ptr<const CTransaction> ptx = mempool.get(hash);
if (ptx)
{
txOut = *ptx;
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 (const 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;
{
const 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, consensusParams)) {
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(const CBlock& block, CDiskBlockPos& pos, const CMessageHeader::MessageStartChars& messageStart)
{
// 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(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, const Consensus::Params& consensusParams)
{
block.SetNull();
// Open history file to read
CAutoFile filein(OpenBlockFile(pos, true), SER_DISK, CLIENT_VERSION);
if (filein.IsNull())
return error("ReadBlockFromDisk: OpenBlockFile failed for %s", pos.ToString());
// Read block
try {
filein >> block;
}
catch (const std::exception& e) {
return error("%s: Deserialize or I/O error - %s at %s", __func__, e.what(), pos.ToString());
}
// Check the header
if (!CheckProofOfWork(block.GetHash(), block.nBits, consensusParams))
return error("ReadBlockFromDisk: Errors in block header at %s", pos.ToString());
return true;
}
bool ReadBlockFromDisk(CBlock& block, const CBlockIndex* pindex, const Consensus::Params& consensusParams)
{
if (!ReadBlockFromDisk(block, pindex->GetBlockPos(), consensusParams))
return false;
if (block.GetHash() != pindex->GetBlockHash())
return error("ReadBlockFromDisk(CBlock&, CBlockIndex*): GetHash() doesn't match index for %s at %s",
pindex->ToString(), pindex->GetBlockPos().ToString());
return true;
}
CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams)
{
int halvings = nHeight / consensusParams.nSubsidyHalvingInterval;
// Force block reward to zero when right shift is undefined.
if (halvings >= 64)
return 0;
CAmount nSubsidy = 50 * COIN;
// Subsidy is cut in half every 210,000 blocks which will occur approximately every 4 years.
nSubsidy >>= halvings;
return nSubsidy;
}
bool IsInitialBlockDownload()
{
const CChainParams& chainParams = Params();
// Once this function has returned false, it must remain false.
static std::atomic<bool> latchToFalse{false};
// Optimization: pre-test latch before taking the lock.
if (latchToFalse.load(std::memory_order_relaxed))
return false;
LOCK(cs_main);
if (latchToFalse.load(std::memory_order_relaxed))
return false;
if (fImporting || fReindex)
return true;
if (fCheckpointsEnabled && chainActive.Height() < Checkpoints::GetTotalBlocksEstimate(chainParams.Checkpoints()))
return true;
bool state = (chainActive.Height() < pindexBestHeader->nHeight - 24 * 6 ||
std::max(chainActive.Tip()->GetBlockTime(), pindexBestHeader->GetBlockTime()) < GetTime() - nMaxTipAge);
if (!state)
latchToFalse.store(true, std::memory_order_relaxed);
return state;
}
bool fLargeWorkForkFound = false;
bool fLargeWorkInvalidChainFound = false;
CBlockIndex *pindexBestForkTip = NULL, *pindexBestForkBase = NULL;
static void AlertNotify(const std::string& strMessage)
{
uiInterface.NotifyAlertChanged();
std::string strCmd = GetArg("-alertnotify", "");
if (strCmd.empty()) return;
// Alert text should be plain ascii coming from a trusted source, but to
// be safe we first strip anything not in safeChars, then add single quotes around
// the whole string before passing it to the shell:
std::string singleQuote("'");
std::string safeStatus = SanitizeString(strMessage);
safeStatus = singleQuote+safeStatus+singleQuote;
boost::replace_all(strCmd, "%s", safeStatus);
boost::thread t(runCommand, strCmd); // thread runs free
}
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("'");
AlertNotify(warning);
}
if (pindexBestForkTip && pindexBestForkBase)
{
LogPrintf("%s: 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", __func__,
pindexBestForkBase->nHeight, pindexBestForkBase->phashBlock->ToString(),
pindexBestForkTip->nHeight, pindexBestForkTip->phashBlock->ToString());
fLargeWorkForkFound = true;
}
else
{
LogPrintf("%s: Warning: Found invalid chain at least ~6 blocks longer than our best chain.\nChain state database corruption likely.\n", __func__);
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 where we should warn the user about as a fork of at least 7 blocks
// with a tip 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", DEFAULT_BANSCORE_THRESHOLD);
if (state->nMisbehavior >= banscore && state->nMisbehavior - howmuch < banscore)
{
LogPrintf("%s: %s peer=%d (%d -> %d) BAN THRESHOLD EXCEEDED\n", __func__, state->name, pnode, state->nMisbehavior-howmuch, state->nMisbehavior);
state->fShouldBan = true;
} else
LogPrintf("%s: %s peer=%d (%d -> %d)\n", __func__, state->name, pnode, state->nMisbehavior-howmuch, state->nMisbehavior);
}
void static InvalidChainFound(CBlockIndex* pindexNew)
{
if (!pindexBestInvalid || pindexNew->nChainWork > pindexBestInvalid->nChainWork)
pindexBestInvalid = pindexNew;
LogPrintf("%s: invalid block=%s height=%d log2_work=%.8g date=%s\n", __func__,
pindexNew->GetBlockHash().ToString(), pindexNew->nHeight,
log(pindexNew->nChainWork.getdouble())/log(2.0), DateTimeStrFormat("%Y-%m-%d %H:%M:%S",
pindexNew->GetBlockTime()));
CBlockIndex *tip = chainActive.Tip();
assert (tip);
LogPrintf("%s: current best=%s height=%d log2_work=%.8g date=%s\n", __func__,
tip->GetBlockHash().ToString(), chainActive.Height(), log(tip->nChainWork.getdouble())/log(2.0),
DateTimeStrFormat("%Y-%m-%d %H:%M:%S", tip->GetBlockTime()));
CheckForkWarningConditions();
}
void static InvalidBlockFound(CBlockIndex *pindex, const CValidationState &state) {
if (!state.CorruptionPossible()) {
pindex->nStatus |= BLOCK_FAILED_VALID;
setDirtyBlockIndex.insert(pindex);
setBlockIndexCandidates.erase(pindex);
InvalidChainFound(pindex);
}
}
void UpdateCoins(const CTransaction& tx, 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) {
CCoinsModifier coins = inputs.ModifyCoins(txin.prevout.hash);
unsigned nPos = txin.prevout.n;
if (nPos >= coins->vout.size() || coins->vout[nPos].IsNull())
assert(false);
// mark an outpoint spent, and construct undo information
txundo.vprevout.push_back(CTxInUndo(coins->vout[nPos]));
coins->Spend(nPos);
if (coins->vout.size() == 0) {
CTxInUndo& undo = txundo.vprevout.back();
undo.nHeight = coins->nHeight;
undo.fCoinBase = coins->fCoinBase;
undo.nVersion = coins->nVersion;
}
}
}
// add outputs
inputs.ModifyNewCoins(tx.GetHash(), tx.IsCoinBase())->FromTx(tx, nHeight);
}
void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, int nHeight)
{
CTxUndo txundo;
UpdateCoins(tx, inputs, txundo, nHeight);
}
bool CScriptCheck::operator()() {
const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
const CScriptWitness *witness = (nIn < ptxTo->wit.vtxinwit.size()) ? &ptxTo->wit.vtxinwit[nIn].scriptWitness : NULL;
if (!VerifyScript(scriptSig, scriptPubKey, witness, nFlags, CachingTransactionSignatureChecker(ptxTo, nIn, amount, cacheStore, *txdata), &error)) {
return false;
}
return true;
}
int GetSpendHeight(const CCoinsViewCache& inputs)
{
LOCK(cs_main);
CBlockIndex* pindexPrev = mapBlockIndex.find(inputs.GetBestBlock())->second;
return pindexPrev->nHeight + 1;
}
namespace Consensus {
bool CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoinsViewCache& inputs, int nSpendHeight)
{
// 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(false, 0, "", "Inputs unavailable");
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(false,
REJECT_INVALID, "bad-txns-premature-spend-of-coinbase",
strprintf("tried to spend coinbase at depth %d", nSpendHeight - coins->nHeight));
}
// 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, false, REJECT_INVALID, "bad-txns-inputvalues-outofrange");
}
if (nValueIn < tx.GetValueOut())
return state.DoS(100, false, REJECT_INVALID, "bad-txns-in-belowout", false,
strprintf("value in (%s) < value out (%s)", FormatMoney(nValueIn), FormatMoney(tx.GetValueOut())));
// Tally transaction fees
CAmount nTxFee = nValueIn - tx.GetValueOut();
if (nTxFee < 0)
return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-negative");
nFees += nTxFee;
if (!MoneyRange(nFees))
return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-outofrange");
return true;
}
}// namespace Consensus
bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsViewCache &inputs, bool fScriptChecks, unsigned int flags, bool cacheStore, PrecomputedTransactionData& txdata, std::vector<CScriptCheck> *pvChecks)
{
if (!tx.IsCoinBase())
{
if (!Consensus::CheckTxInputs(tx, state, inputs, GetSpendHeight(inputs)))
return false;
if (pvChecks)
pvChecks->reserve(tx.vin.size());
// 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. Assuming the checkpoints are valid this
// is safe because block merkle hashes are still computed and checked,
// and any change will be caught at the next checkpoint. Of course, if
// the checkpoint is for a chain that's invalid due to false scriptSigs
// this optimization would allow an invalid chain to be accepted.
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, &txdata);
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 check2(*coins, tx, i,
flags & ~STANDARD_NOT_MANDATORY_VERIFY_FLAGS, cacheStore, &txdata);
if (check2())
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 soft-fork
// super-majority signaling has occurred.
return state.DoS(100,false, REJECT_INVALID, strprintf("mandatory-script-verify-flag-failed (%s)", ScriptErrorString(check.GetScriptError())));
}
}
}
}
return true;
}
namespace {
bool UndoWriteToDisk(const CBlockUndo& blockundo, CDiskBlockPos& pos, const uint256& hashBlock, const CMessageHeader::MessageStartChars& messageStart)
{
// Open history file to append
CAutoFile fileout(OpenUndoFile(pos), SER_DISK, CLIENT_VERSION);
if (fileout.IsNull())
return error("%s: OpenUndoFile failed", __func__);
// Write index header
unsigned int nSize = fileout.GetSerializeSize(blockundo);
fileout << FLATDATA(messageStart) << nSize;
// Write undo data
long fileOutPos = ftell(fileout.Get());
if (fileOutPos < 0)
return error("%s: ftell failed", __func__);
pos.nPos = (unsigned int)fileOutPos;
fileout << blockundo;
// calculate & write checksum
CHashWriter hasher(SER_GETHASH, PROTOCOL_VERSION);
hasher << hashBlock;
hasher << blockundo;
fileout << hasher.GetHash();
return true;
}
bool UndoReadFromDisk(CBlockUndo& blockundo, 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("%s: OpenUndoFile failed", __func__);
// Read block
uint256 hashChecksum;
try {
filein >> blockundo;
filein >> hashChecksum;
}
catch (const 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 << blockundo;
if (hashChecksum != hasher.GetHash())
return error("%s: Checksum mismatch", __func__);
return true;
}
/** Abort with a message */
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 AbortNode(CValidationState& state, const std::string& strMessage, const std::string& userMessage="")
{
AbortNode(strMessage, userMessage);
return state.Error(strMessage);
}
} // anon namespace
/**
* Apply the undo operation of a CTxInUndo to the given chain state.
* @param undo The undo object.
* @param view The coins view to which to apply the changes.
* @param out The out point that corresponds to the tx input.
* @return True on success.
*/
static bool ApplyTxInUndo(const CTxInUndo& undo, CCoinsViewCache& view, const COutPoint& out)
{
bool fClean = true;
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("%s: undo data overwriting existing transaction", __func__);
coins->Clear();
coins->fCoinBase = undo.fCoinBase;
coins->nHeight = undo.nHeight;
coins->nVersion = undo.nVersion;
} else {
if (coins->IsPruned())
fClean = fClean && error("%s: undo data adding output to missing transaction", __func__);
}
if (coins->IsAvailable(out.n))
fClean = fClean && error("%s: undo data overwriting existing output", __func__);
if (coins->vout.size() < out.n+1)
coins->vout.resize(out.n+1);
coins->vout[out.n] = undo.txout;
return fClean;
}
bool DisconnectBlock(const CBlock& block, CValidationState& state, const 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 (!UndoReadFromDisk(blockUndo, 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.
{
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];
if (!ApplyTxInUndo(undo, view, out))
fClean = false;
}
}
}
// move best block pointer to prevout block
view.SetBestBlock(pindex->pprev->GetBlockHash());
if (pfClean) {
*pfClean = fClean;
return true;
}
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("bitcoin-scriptch");
scriptcheckqueue.Thread();
}
// Protected by cs_main
VersionBitsCache versionbitscache;
int32_t ComputeBlockVersion(const CBlockIndex* pindexPrev, const Consensus::Params& params)
{
LOCK(cs_main);
int32_t nVersion = VERSIONBITS_TOP_BITS;
for (int i = 0; i < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; i++) {
ThresholdState state = VersionBitsState(pindexPrev, params, (Consensus::DeploymentPos)i, versionbitscache);
if (state == THRESHOLD_LOCKED_IN || state == THRESHOLD_STARTED) {
nVersion |= VersionBitsMask(params, (Consensus::DeploymentPos)i);
}
}
return nVersion;
}
/**
* Threshold condition checker that triggers when unknown versionbits are seen on the network.
*/
class WarningBitsConditionChecker : public AbstractThresholdConditionChecker
{
private:
int bit;
public:
WarningBitsConditionChecker(int bitIn) : bit(bitIn) {}
int64_t BeginTime(const Consensus::Params& params) const { return 0; }
int64_t EndTime(const Consensus::Params& params) const { return std::numeric_limits<int64_t>::max(); }
int Period(const Consensus::Params& params) const { return params.nMinerConfirmationWindow; }
int Threshold(const Consensus::Params& params) const { return params.nRuleChangeActivationThreshold; }
bool Condition(const CBlockIndex* pindex, const Consensus::Params& params) const
{
return ((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) &&
((pindex->nVersion >> bit) & 1) != 0 &&
((ComputeBlockVersion(pindex->pprev, params) >> bit) & 1) == 0;
}
};
// Protected by cs_main
static ThresholdConditionCache warningcache[VERSIONBITS_NUM_BITS];
static int64_t nTimeCheck = 0;
static int64_t nTimeForks = 0;
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, const CChainParams& chainparams, bool fJustCheck)
{
AssertLockHeld(cs_main);
int64_t nTimeStart = GetTimeMicros();
// Check it again in case a previous version let a bad block in
if (!CheckBlock(block, state, chainparams.GetConsensus(), !fJustCheck, !fJustCheck))
return error("%s: Consensus::CheckBlock: %s", __func__, FormatStateMessage(state));
// verify that the view's current state corresponds to the previous block
uint256 hashPrevBlock = pindex->pprev == NULL ? uint256() : 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() == chainparams.GetConsensus().hashGenesisBlock) {
if (!fJustCheck)
view.SetBestBlock(pindex->GetBlockHash());
return true;
}
bool fScriptChecks = true;
if (fCheckpointsEnabled) {
CBlockIndex *pindexLastCheckpoint = Checkpoints::GetLastCheckpoint(chainparams.Checkpoints());
if (pindexLastCheckpoint && pindexLastCheckpoint->GetAncestor(pindex->nHeight) == pindex) {
// This block is an ancestor of a checkpoint: disable script checks
fScriptChecks = false;
}
}
int64_t nTime1 = GetTimeMicros(); nTimeCheck += nTime1 - nTimeStart;
LogPrint("bench", " - Sanity checks: %.2fms [%.2fs]\n", 0.001 * (nTime1 - nTimeStart), nTimeCheck * 0.000001);
// 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 to all blocks with a timestamp after March 15, 2012, 0:00 UTC.
// Now that the whole chain is irreversibly beyond that time it is applied to all blocks except the
// two in the chain that violate it. This prevents exploiting the issue against nodes during their
// initial block download.
bool fEnforceBIP30 = (!pindex->phashBlock) || // Enforce on CreateNewBlock invocations which don't have a hash.
!((pindex->nHeight==91842 && pindex->GetBlockHash() == uint256S("0x00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec")) ||
(pindex->nHeight==91880 && pindex->GetBlockHash() == uint256S("0x00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721")));
// Once BIP34 activated it was not possible to create new duplicate coinbases and thus other than starting
// with the 2 existing duplicate coinbase pairs, not possible to create overwriting txs. But by the
// time BIP34 activated, in each of the existing pairs the duplicate coinbase had overwritten the first
// before the first had been spent. Since those coinbases are sufficiently buried its no longer possible to create further
// duplicate transactions descending from the known pairs either.
// If we're on the known chain at height greater than where BIP34 activated, we can save the db accesses needed for the BIP30 check.
CBlockIndex *pindexBIP34height = pindex->pprev->GetAncestor(chainparams.GetConsensus().BIP34Height);
//Only continue to enforce if we're below BIP34 activation height or the block hash at that height doesn't correspond.
fEnforceBIP30 = fEnforceBIP30 && (!pindexBIP34height || !(pindexBIP34height->GetBlockHash() == chainparams.GetConsensus().BIP34Hash));
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 Apr 1 2012
int64_t nBIP16SwitchTime = 1333238400;
bool fStrictPayToScriptHash = (pindex->GetBlockTime() >= nBIP16SwitchTime);
unsigned int flags = fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE;
// Start enforcing the DERSIG (BIP66) rule
if (pindex->nHeight >= chainparams.GetConsensus().BIP66Height) {
flags |= SCRIPT_VERIFY_DERSIG;
}
// Start enforcing CHECKLOCKTIMEVERIFY (BIP65) rule
if (pindex->nHeight >= chainparams.GetConsensus().BIP65Height) {
flags |= SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY;
}
// Start enforcing BIP68 (sequence locks) and BIP112 (CHECKSEQUENCEVERIFY) using versionbits logic.
int nLockTimeFlags = 0;
if (VersionBitsState(pindex->pprev, chainparams.GetConsensus(), Consensus::DEPLOYMENT_CSV, versionbitscache) == THRESHOLD_ACTIVE) {
flags |= SCRIPT_VERIFY_CHECKSEQUENCEVERIFY;
nLockTimeFlags |= LOCKTIME_VERIFY_SEQUENCE;
}
// Start enforcing WITNESS rules using versionbits logic.
if (IsWitnessEnabled(pindex->pprev, chainparams.GetConsensus())) {
flags |= SCRIPT_VERIFY_WITNESS;
flags |= SCRIPT_VERIFY_NULLDUMMY;
}
int64_t nTime2 = GetTimeMicros(); nTimeForks += nTime2 - nTime1;
LogPrint("bench", " - Fork checks: %.2fms [%.2fs]\n", 0.001 * (nTime2 - nTime1), nTimeForks * 0.000001);
CBlockUndo blockundo;
CCheckQueueControl<CScriptCheck> control(fScriptChecks && nScriptCheckThreads ? &scriptcheckqueue : NULL);
std::vector<uint256> vOrphanErase;
std::vector<int> prevheights;
CAmount nFees = 0;
int nInputs = 0;
int64_t nSigOpsCost = 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);
std::vector<PrecomputedTransactionData> txdata;
txdata.reserve(block.vtx.size()); // Required so that pointers to individual PrecomputedTransactionData don't get invalidated
for (unsigned int i = 0; i < block.vtx.size(); i++)
{
const CTransaction &tx = block.vtx[i];
nInputs += tx.vin.size();
if (!tx.IsCoinBase())
{
if (!view.HaveInputs(tx))
return state.DoS(100, error("ConnectBlock(): inputs missing/spent"),
REJECT_INVALID, "bad-txns-inputs-missingorspent");
// Check that transaction is BIP68 final
// BIP68 lock checks (as opposed to nLockTime checks) must
// be in ConnectBlock because they require the UTXO set
prevheights.resize(tx.vin.size());
for (size_t j = 0; j < tx.vin.size(); j++) {
prevheights[j] = view.AccessCoins(tx.vin[j].prevout.hash)->nHeight;
}
// Which orphan pool entries must we evict?
for (size_t j = 0; j < tx.vin.size(); j++) {
auto itByPrev = mapOrphanTransactionsByPrev.find(tx.vin[j].prevout);
if (itByPrev == mapOrphanTransactionsByPrev.end()) continue;
for (auto mi = itByPrev->second.begin(); mi != itByPrev->second.end(); ++mi) {
const CTransaction& orphanTx = (*mi)->second.tx;
const uint256& orphanHash = orphanTx.GetHash();
vOrphanErase.push_back(orphanHash);
}
}
if (!SequenceLocks(tx, nLockTimeFlags, &prevheights, *pindex)) {
return state.DoS(100, error("%s: contains a non-BIP68-final transaction", __func__),
REJECT_INVALID, "bad-txns-nonfinal");
}
}
// GetTransactionSigOpCost counts 3 types of sigops:
// * legacy (always)
// * p2sh (when P2SH enabled in flags and excludes coinbase)
// * witness (when witness enabled in flags and excludes coinbase)
nSigOpsCost += GetTransactionSigOpCost(tx, view, flags);
if (nSigOpsCost > MAX_BLOCK_SIGOPS_COST)
return state.DoS(100, error("ConnectBlock(): too many sigops"),
REJECT_INVALID, "bad-blk-sigops");
txdata.emplace_back(tx);
if (!tx.IsCoinBase())
{
nFees += view.GetValueIn(tx)-tx.GetValueOut();
std::vector<CScriptCheck> vChecks;
bool fCacheResults = fJustCheck; /* Don't cache results if we're actually connecting blocks (still consult the cache, though) */
if (!CheckInputs(tx, state, view, fScriptChecks, flags, fCacheResults, txdata[i], nScriptCheckThreads ? &vChecks : NULL))
return error("ConnectBlock(): CheckInputs on %s failed with %s",
tx.GetHash().ToString(), FormatStateMessage(state));
control.Add(vChecks);
}
CTxUndo undoDummy;
if (i > 0) {
blockundo.vtxundo.push_back(CTxUndo());
}
UpdateCoins(tx, 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 nTime3 = GetTimeMicros(); nTimeConnect += nTime3 - nTime2;
LogPrint("bench", " - Connect %u transactions: %.2fms (%.3fms/tx, %.3fms/txin) [%.2fs]\n", (unsigned)block.vtx.size(), 0.001 * (nTime3 - nTime2), 0.001 * (nTime3 - nTime2) / block.vtx.size(), nInputs <= 1 ? 0 : 0.001 * (nTime3 - nTime2) / (nInputs-1), nTimeConnect * 0.000001);
CAmount blockReward = nFees + GetBlockSubsidy(pindex->nHeight, chainparams.GetConsensus());
if (block.vtx[0].GetValueOut() > blockReward)
return state.DoS(100,
error("ConnectBlock(): coinbase pays too much (actual=%d vs limit=%d)",
block.vtx[0].GetValueOut(), blockReward),
REJECT_INVALID, "bad-cb-amount");
if (!control.Wait())
return state.DoS(100, false);
int64_t nTime4 = GetTimeMicros(); nTimeVerify += nTime4 - nTime2;
LogPrint("bench", " - Verify %u txins: %.2fms (%.3fms/txin) [%.2fs]\n", nInputs - 1, 0.001 * (nTime4 - nTime2), nInputs <= 1 ? 0 : 0.001 * (nTime4 - nTime2) / (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 (!UndoWriteToDisk(blockundo, _pos, pindex->pprev->GetBlockHash(), chainparams.MessageStart()))
return AbortNode(state, "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 AbortNode(state, "Failed to write transaction index");
// add this block to the view's block chain
view.SetBestBlock(pindex->GetBlockHash());
int64_t nTime5 = GetTimeMicros(); nTimeIndex += nTime5 - nTime4;
LogPrint("bench", " - Index writing: %.2fms [%.2fs]\n", 0.001 * (nTime5 - nTime4), nTimeIndex * 0.000001);
// Watch for changes to the previous coinbase transaction.
static uint256 hashPrevBestCoinBase;
GetMainSignals().UpdatedTransaction(hashPrevBestCoinBase);
hashPrevBestCoinBase = block.vtx[0].GetHash();
// Erase orphan transactions include or precluded by this block
if (vOrphanErase.size()) {
int nErased = 0;
BOOST_FOREACH(uint256 &orphanHash, vOrphanErase) {
nErased += EraseOrphanTx(orphanHash);
}
LogPrint("mempool", "Erased %d orphan tx included or conflicted by block\n", nErased);
}
int64_t nTime6 = GetTimeMicros(); nTimeCallbacks += nTime6 - nTime5;
LogPrint("bench", " - Callbacks: %.2fms [%.2fs]\n", 0.001 * (nTime6 - nTime5), nTimeCallbacks * 0.000001);
return true;
}
enum FlushStateMode {
FLUSH_STATE_NONE,
FLUSH_STATE_IF_NEEDED,
FLUSH_STATE_PERIODIC,
FLUSH_STATE_ALWAYS
};
/**
* Update the on-disk chain state.
* The caches and indexes are flushed depending on the mode we're called with
* if they're too large, if it's been a while since the last write,
* or always and in all cases if we're in prune mode and are deleting files.
*/
bool static FlushStateToDisk(CValidationState &state, FlushStateMode mode) {
const CChainParams& chainparams = Params();
LOCK2(cs_main, cs_LastBlockFile);
static int64_t nLastWrite = 0;
static int64_t nLastFlush = 0;
static int64_t nLastSetChain = 0;
std::set<int> setFilesToPrune;
bool fFlushForPrune = false;
try {
if (fPruneMode && fCheckForPruning && !fReindex) {
FindFilesToPrune(setFilesToPrune, chainparams.PruneAfterHeight());
fCheckForPruning = false;
if (!setFilesToPrune.empty()) {
fFlushForPrune = true;
if (!fHavePruned) {
pblocktree->WriteFlag("prunedblockfiles", true);
fHavePruned = true;
}
}
}
int64_t nNow = GetTimeMicros();
// Avoid writing/flushing immediately after startup.
if (nLastWrite == 0) {
nLastWrite = nNow;
}
if (nLastFlush == 0) {
nLastFlush = nNow;
}
if (nLastSetChain == 0) {
nLastSetChain = nNow;
}
size_t cacheSize = pcoinsTip->DynamicMemoryUsage();
// The cache is large and close to the limit, but we have time now (not in the middle of a block processing).
bool fCacheLarge = mode == FLUSH_STATE_PERIODIC && cacheSize * (10.0/9) > nCoinCacheUsage;
// The cache is over the limit, we have to write now.
bool fCacheCritical = mode == FLUSH_STATE_IF_NEEDED && cacheSize > nCoinCacheUsage;
// It's been a while since we wrote the block index to disk. Do this frequently, so we don't need to redownload after a crash.
bool fPeriodicWrite = mode == FLUSH_STATE_PERIODIC && nNow > nLastWrite + (int64_t)DATABASE_WRITE_INTERVAL * 1000000;
// It's been very long since we flushed the cache. Do this infrequently, to optimize cache usage.
bool fPeriodicFlush = mode == FLUSH_STATE_PERIODIC && nNow > nLastFlush + (int64_t)DATABASE_FLUSH_INTERVAL * 1000000;
// Combine all conditions that result in a full cache flush.
bool fDoFullFlush = (mode == FLUSH_STATE_ALWAYS) || fCacheLarge || fCacheCritical || fPeriodicFlush || fFlushForPrune;
// Write blocks and block index to disk.
if (fDoFullFlush || fPeriodicWrite) {
// Depend on nMinDiskSpace to ensure we can write block index
if (!CheckDiskSpace(0))
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).
{
std::vector<std::pair<int, const CBlockFileInfo*> > vFiles;
vFiles.reserve(setDirtyFileInfo.size());
for (set<int>::iterator it = setDirtyFileInfo.begin(); it != setDirtyFileInfo.end(); ) {
vFiles.push_back(make_pair(*it, &vinfoBlockFile[*it]));
setDirtyFileInfo.erase(it++);
}
std::vector<const CBlockIndex*> vBlocks;
vBlocks.reserve(setDirtyBlockIndex.size());
for (set<CBlockIndex*>::iterator it = setDirtyBlockIndex.begin(); it != setDirtyBlockIndex.end(); ) {
vBlocks.push_back(*it);
setDirtyBlockIndex.erase(it++);
}
if (!pblocktree->WriteBatchSync(vFiles, nLastBlockFile, vBlocks)) {
return AbortNode(state, "Files to write to block index database");
}
}
// Finally remove any pruned files
if (fFlushForPrune)
UnlinkPrunedFiles(setFilesToPrune);
nLastWrite = nNow;
}
// Flush best chain related state. This can only be done if the blocks / block index write was also done.
if (fDoFullFlush) {
// Typical CCoins structures on disk are around 128 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(128 * 2 * 2 * pcoinsTip->GetCacheSize()))
return state.Error("out of disk space");
// Flush the chainstate (which may refer to block index entries).
if (!pcoinsTip->Flush())
return AbortNode(state, "Failed to write to coin database");
nLastFlush = nNow;
}
if (fDoFullFlush || ((mode == FLUSH_STATE_ALWAYS || mode == FLUSH_STATE_PERIODIC) && nNow > nLastSetChain + (int64_t)DATABASE_WRITE_INTERVAL * 1000000)) {
// Update best block in wallet (so we can detect restored wallets).
GetMainSignals().SetBestChain(chainActive.GetLocator());
nLastSetChain = nNow;
}
} catch (const std::runtime_error& e) {
return AbortNode(state, std::string("System error while flushing: ") + e.what());
}
return true;
}
void FlushStateToDisk() {
CValidationState state;
FlushStateToDisk(state, FLUSH_STATE_ALWAYS);
}
void PruneAndFlush() {
CValidationState state;
fCheckForPruning = true;
FlushStateToDisk(state, FLUSH_STATE_NONE);
}
/** Update chainActive and related internal data structures. */
void static UpdateTip(CBlockIndex *pindexNew, const CChainParams& chainParams) {
chainActive.SetTip(pindexNew);
// New best block
nTimeBestReceived = GetTime();
mempool.AddTransactionsUpdated(1);
cvBlockChange.notify_all();
static bool fWarned = false;
std::vector<std::string> warningMessages;
if (!IsInitialBlockDownload())
{
int nUpgraded = 0;
const CBlockIndex* pindex = chainActive.Tip();
for (int bit = 0; bit < VERSIONBITS_NUM_BITS; bit++) {
WarningBitsConditionChecker checker(bit);
ThresholdState state = checker.GetStateFor(pindex, chainParams.GetConsensus(), warningcache[bit]);
if (state == THRESHOLD_ACTIVE || state == THRESHOLD_LOCKED_IN) {
if (state == THRESHOLD_ACTIVE) {
strMiscWarning = strprintf(_("Warning: unknown new rules activated (versionbit %i)"), bit);
if (!fWarned) {
AlertNotify(strMiscWarning);
fWarned = true;
}
} else {
warningMessages.push_back(strprintf("unknown new rules are about to activate (versionbit %i)", bit));
}
}
}
// Check the version of the last 100 blocks to see if we need to upgrade:
for (int i = 0; i < 100 && pindex != NULL; i++)
{
int32_t nExpectedVersion = ComputeBlockVersion(pindex->pprev, chainParams.GetConsensus());
if (pindex->nVersion > VERSIONBITS_LAST_OLD_BLOCK_VERSION && (pindex->nVersion & ~nExpectedVersion) != 0)
++nUpgraded;
pindex = pindex->pprev;
}
if (nUpgraded > 0)
warningMessages.push_back(strprintf("%d of last 100 blocks have unexpected version", nUpgraded));
if (nUpgraded > 100/2)
{
// strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
strMiscWarning = _("Warning: Unknown block versions being mined! It's possible unknown rules are in effect");
if (!fWarned) {
AlertNotify(strMiscWarning);
fWarned = true;
}
}
}
LogPrintf("%s: new best=%s height=%d version=0x%08x log2_work=%.8g tx=%lu date='%s' progress=%f cache=%.1fMiB(%utx)", __func__,
chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(), chainActive.Tip()->nVersion,
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(chainParams.Checkpoints(), chainActive.Tip()), pcoinsTip->DynamicMemoryUsage() * (1.0 / (1<<20)), pcoinsTip->GetCacheSize());
if (!warningMessages.empty())
LogPrintf(" warning='%s'", boost::algorithm::join(warningMessages, ", "));
LogPrintf("\n");
}
/** Disconnect chainActive's tip. You probably want to call mempool.removeForReorg and manually re-limit mempool size after this, with cs_main held. */
bool static DisconnectTip(CValidationState& state, const CChainParams& chainparams, bool fBare = false)
{
CBlockIndex *pindexDelete = chainActive.Tip();
assert(pindexDelete);
// Read block from disk.
CBlock block;
if (!ReadBlockFromDisk(block, pindexDelete, chainparams.GetConsensus()))
return AbortNode(state, "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;
if (!fBare) {
// Resurrect mempool transactions from the disconnected block.
std::vector<uint256> vHashUpdate;
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, true)) {
- mempool.removeRecursive(tx, removed);
+ mempool.removeRecursive(tx);
} else if (mempool.exists(tx.GetHash())) {
vHashUpdate.push_back(tx.GetHash());
}
}
// AcceptToMemoryPool/addUnchecked all assume that new mempool entries have
// no in-mempool children, which is generally not true when adding
// previously-confirmed transactions back to the mempool.
// UpdateTransactionsFromBlock finds descendants of any transactions in this
// block that were added back and cleans up the mempool state.
mempool.UpdateTransactionsFromBlock(vHashUpdate);
}
// Update chainActive and related variables.
UpdateTip(pindexDelete->pprev, chainparams);
// Let wallets know transactions went from 1-confirmed to
// 0-confirmed or conflicted:
BOOST_FOREACH(const CTransaction &tx, block.vtx) {
GetMainSignals().SyncTransaction(tx, pindexDelete->pprev, CMainSignals::SYNC_TRANSACTION_NOT_IN_BLOCK);
}
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, const CChainParams& chainparams, CBlockIndex* pindexNew, const CBlock* pblock, std::list<CTransaction> &txConflicted, std::vector<std::tuple<CTransaction,CBlockIndex*,int>> &txChanged)
{
assert(pindexNew->pprev == chainActive.Tip());
// Read block from disk.
int64_t nTime1 = GetTimeMicros();
CBlock block;
if (!pblock) {
if (!ReadBlockFromDisk(block, pindexNew, chainparams.GetConsensus()))
return AbortNode(state, "Failed to read block");
pblock = &block;
}
// 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);
bool rv = ConnectBlock(*pblock, state, pindexNew, view, chainparams);
GetMainSignals().BlockChecked(*pblock, state);
if (!rv) {
if (state.IsInvalid())
InvalidBlockFound(pindexNew, state);
return error("ConnectTip(): ConnectBlock %s failed", pindexNew->GetBlockHash().ToString());
}
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.;
- mempool.removeForBlock(pblock->vtx, pindexNew->nHeight, txConflicted, !IsInitialBlockDownload());
+ mempool.removeForBlock(pblock->vtx, pindexNew->nHeight, &txConflicted, !IsInitialBlockDownload());
// Update chainActive & related variables.
UpdateTip(pindexNew, chainparams);
for(unsigned int i=0; i < pblock->vtx.size(); i++)
txChanged.emplace_back(pblock->vtx[i], pindexNew, i);
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->nChainTx || pindexTest->nHeight == 0);
// Pruned nodes may have entries in setBlockIndexCandidates for
// which block files have been deleted. Remove those as candidates
// for the most work chain if we come across them; we can't switch
// to a chain unless we have all the non-active-chain parent blocks.
bool fFailedChain = pindexTest->nStatus & BLOCK_FAILED_MASK;
bool fMissingData = !(pindexTest->nStatus & BLOCK_HAVE_DATA);
if (fFailedChain || fMissingData) {
// Candidate chain is not usable (either invalid or missing data)
if (fFailedChain && (pindexBestInvalid == NULL || pindexNew->nChainWork > pindexBestInvalid->nChainWork))
pindexBestInvalid = pindexNew;
CBlockIndex *pindexFailed = pindexNew;
// Remove the entire chain from the set.
while (pindexTest != pindexFailed) {
if (fFailedChain) {
pindexFailed->nStatus |= BLOCK_FAILED_CHILD;
} else if (fMissingData) {
// If we're missing data, then add back to mapBlocksUnlinked,
// so that if the block arrives in the future we can try adding
// to setBlockIndexCandidates again.
mapBlocksUnlinked.insert(std::make_pair(pindexFailed->pprev, pindexFailed));
}
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, const CChainParams& chainparams, CBlockIndex* pindexMostWork, const CBlock* pblock, bool& fInvalidFound, std::list<CTransaction>& txConflicted, std::vector<std::tuple<CTransaction,CBlockIndex*,int>>& txChanged)
{
AssertLockHeld(cs_main);
const CBlockIndex *pindexOldTip = chainActive.Tip();
const CBlockIndex *pindexFork = chainActive.FindFork(pindexMostWork);
// Disconnect active blocks which are no longer in the best chain.
bool fBlocksDisconnected = false;
while (chainActive.Tip() && chainActive.Tip() != pindexFork) {
if (!DisconnectTip(state, chainparams))
return false;
fBlocksDisconnected = true;
}
// 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, chainparams, pindexConnect, pindexConnect == pindexMostWork ? pblock : NULL, txConflicted, txChanged)) {
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;
}
}
}
}
if (fBlocksDisconnected) {
mempool.removeForReorg(pcoinsTip, chainActive.Tip()->nHeight + 1, STANDARD_LOCKTIME_VERIFY_FLAGS);
LimitMempoolSize(mempool, GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000, GetArg("-mempoolexpiry", DEFAULT_MEMPOOL_EXPIRY) * 60 * 60);
}
mempool.check(pcoinsTip);
// Callbacks/notifications for a new best chain.
if (fInvalidFound)
CheckForkWarningConditionsOnNewFork(vpindexToConnect.back());
else
CheckForkWarningConditions();
return true;
}
static void NotifyHeaderTip() {
bool fNotify = false;
bool fInitialBlockDownload = false;
static CBlockIndex* pindexHeaderOld = NULL;
CBlockIndex* pindexHeader = NULL;
{
LOCK(cs_main);
pindexHeader = pindexBestHeader;
if (pindexHeader != pindexHeaderOld) {
fNotify = true;
fInitialBlockDownload = IsInitialBlockDownload();
pindexHeaderOld = pindexHeader;
}
}
// Send block tip changed notifications without cs_main
if (fNotify) {
uiInterface.NotifyHeaderTip(fInitialBlockDownload, pindexHeader);
}
}
/**
* 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, const CChainParams& chainparams, const CBlock *pblock) {
CBlockIndex *pindexMostWork = NULL;
CBlockIndex *pindexNewTip = NULL;
std::vector<std::tuple<CTransaction,CBlockIndex*,int>> txChanged;
if (pblock)
txChanged.reserve(pblock->vtx.size());
do {
txChanged.clear();
boost::this_thread::interruption_point();
if (ShutdownRequested())
break;
const CBlockIndex *pindexFork;
std::list<CTransaction> txConflicted;
bool fInitialDownload;
{
LOCK(cs_main);
CBlockIndex *pindexOldTip = chainActive.Tip();
if (pindexMostWork == NULL) {
pindexMostWork = FindMostWorkChain();
}
// Whether we have anything to do at all.
if (pindexMostWork == NULL || pindexMostWork == chainActive.Tip())
return true;
bool fInvalidFound = false;
if (!ActivateBestChainStep(state, chainparams, pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : NULL, fInvalidFound, txConflicted, txChanged))
return false;
if (fInvalidFound) {
// Wipe cache, we may need another branch now.
pindexMostWork = NULL;
}
pindexNewTip = chainActive.Tip();
pindexFork = chainActive.FindFork(pindexOldTip);
fInitialDownload = IsInitialBlockDownload();
}
// When we reach this point, we switched to a new tip (stored in pindexNewTip).
// Notifications/callbacks that can run without cs_main
// throw all transactions though the signal-interface
// while _not_ holding the cs_main lock
BOOST_FOREACH(const CTransaction &tx, txConflicted)
{
GetMainSignals().SyncTransaction(tx, pindexNewTip, CMainSignals::SYNC_TRANSACTION_NOT_IN_BLOCK);
}
// ... and about transactions that got confirmed:
for(unsigned int i = 0; i < txChanged.size(); i++)
GetMainSignals().SyncTransaction(std::get<0>(txChanged[i]), std::get<1>(txChanged[i]), std::get<2>(txChanged[i]));
// Notify external listeners about the new tip.
GetMainSignals().UpdatedBlockTip(pindexNewTip, pindexFork, fInitialDownload);
// Always notify the UI if a new block tip was connected
if (pindexFork != pindexNewTip) {
uiInterface.NotifyBlockTip(fInitialDownload, pindexNewTip);
}
} while (pindexNewTip != pindexMostWork);
CheckBlockIndex(chainparams.GetConsensus());
// Write changes periodically to disk, after relay.
if (!FlushStateToDisk(state, FLUSH_STATE_PERIODIC)) {
return false;
}
return true;
}
bool PreciousBlock(CValidationState& state, const CChainParams& params, CBlockIndex *pindex)
{
{
LOCK(cs_main);
if (pindex->nChainWork < chainActive.Tip()->nChainWork) {
// Nothing to do, this block is not at the tip.
return true;
}
if (chainActive.Tip()->nChainWork > nLastPreciousChainwork) {
// The chain has been extended since the last call, reset the counter.
nBlockReverseSequenceId = -1;
}
nLastPreciousChainwork = chainActive.Tip()->nChainWork;
setBlockIndexCandidates.erase(pindex);
pindex->nSequenceId = nBlockReverseSequenceId;
if (nBlockReverseSequenceId > std::numeric_limits<int32_t>::min()) {
// We can't keep reducing the counter if somebody really wants to
// call preciousblock 2**31-1 times on the same set of tips...
nBlockReverseSequenceId--;
}
if (pindex->IsValid(BLOCK_VALID_TRANSACTIONS) && pindex->nChainTx) {
setBlockIndexCandidates.insert(pindex);
PruneBlockIndexCandidates();
}
}
return ActivateBestChain(state, params);
}
bool InvalidateBlock(CValidationState& state, const CChainParams& chainparams, 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, chainparams)) {
mempool.removeForReorg(pcoinsTip, chainActive.Tip()->nHeight + 1, STANDARD_LOCKTIME_VERIFY_FLAGS);
return false;
}
}
LimitMempoolSize(mempool, GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000, GetArg("-mempoolexpiry", DEFAULT_MEMPOOL_EXPIRY) * 60 * 60);
// The resulting new best tip may not be in setBlockIndexCandidates anymore, so
// add it 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);
mempool.removeForReorg(pcoinsTip, chainActive.Tip()->nHeight + 1, STANDARD_LOCKTIME_VERIFY_FLAGS);
return true;
}
bool ResetBlockFailureFlags(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;
if (IsWitnessEnabled(pindexNew->pprev, Params().GetConsensus())) {
pindexNew->nStatus |= BLOCK_OPT_WITNESS;
}
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) {
nFile++;
if (vinfoBlockFile.size() <= nFile) {
vinfoBlockFile.resize(nFile + 1);
}
}
pos.nFile = nFile;
pos.nPos = vinfoBlockFile[nFile].nSize;
}
if ((int)nFile != nLastBlockFile) {
if (!fKnown) {
LogPrintf("Leaving block file %i: %s\n", nLastBlockFile, vinfoBlockFile[nLastBlockFile].ToString());
}
FlushBlockFile(!fKnown);
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 (fPruneMode)
fCheckForPruning = true;
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 (fPruneMode)
fCheckForPruning = true;
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, const Consensus::Params& consensusParams, bool fCheckPOW)
{
// Check proof of work matches claimed amount
if (fCheckPOW && !CheckProofOfWork(block.GetHash(), block.nBits, consensusParams))
return state.DoS(50, false, REJECT_INVALID, "high-hash", false, "proof of work failed");
return true;
}
bool CheckBlock(const CBlock& block, CValidationState& state, const Consensus::Params& consensusParams, bool fCheckPOW, bool fCheckMerkleRoot)
{
// These are checks that are independent of context.
if (block.fChecked)
return true;
// Check that the header is valid (particularly PoW). This is mostly
// redundant with the call in AcceptBlockHeader.
if (!CheckBlockHeader(block, state, consensusParams, fCheckPOW))
return false;
// Check the merkle root.
if (fCheckMerkleRoot) {
bool mutated;
uint256 hashMerkleRoot2 = BlockMerkleRoot(block, &mutated);
if (block.hashMerkleRoot != hashMerkleRoot2)
return state.DoS(100, false, REJECT_INVALID, "bad-txnmrklroot", true, "hashMerkleRoot mismatch");
// 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, false, REJECT_INVALID, "bad-txns-duplicate", true, "duplicate transaction");
}
// 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.
// Note that witness malleability is checked in ContextualCheckBlock, so no
// checks that use witness data may be performed here.
// Size limits
if (block.vtx.empty() || block.vtx.size() > MAX_BLOCK_BASE_SIZE || ::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) > MAX_BLOCK_BASE_SIZE)
return state.DoS(100, false, REJECT_INVALID, "bad-blk-length", false, "size limits failed");
// First transaction must be coinbase, the rest must not be
if (block.vtx.empty() || !block.vtx[0].IsCoinBase())
return state.DoS(100, false, REJECT_INVALID, "bad-cb-missing", false, "first tx is not coinbase");
for (unsigned int i = 1; i < block.vtx.size(); i++)
if (block.vtx[i].IsCoinBase())
return state.DoS(100, false, REJECT_INVALID, "bad-cb-multiple", false, "more than one coinbase");
// Check transactions
for (const auto& tx : block.vtx)
if (!CheckTransaction(tx, state))
return state.Invalid(false, state.GetRejectCode(), state.GetRejectReason(),
strprintf("Transaction check failed (tx hash %s) %s", tx.GetHash().ToString(), state.GetDebugMessage()));
unsigned int nSigOps = 0;
for (const auto& tx : block.vtx)
{
nSigOps += GetLegacySigOpCount(tx);
}
if (nSigOps * WITNESS_SCALE_FACTOR > MAX_BLOCK_SIGOPS_COST)
return state.DoS(100, false, REJECT_INVALID, "bad-blk-sigops", false, "out-of-bounds SigOpCount");
if (fCheckPOW && fCheckMerkleRoot)
block.fChecked = true;
return true;
}
static bool CheckIndexAgainstCheckpoint(const CBlockIndex* pindexPrev, CValidationState& state, const CChainParams& chainparams, const uint256& hash)
{
if (*pindexPrev->phashBlock == chainparams.GetConsensus().hashGenesisBlock)
return true;
int nHeight = pindexPrev->nHeight+1;
// Don't accept any forks from the main chain prior to last checkpoint
CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(chainparams.Checkpoints());
if (pcheckpoint && nHeight < pcheckpoint->nHeight)
return state.DoS(100, error("%s: forked chain older than last checkpoint (height %d)", __func__, nHeight));
return true;
}
bool IsWitnessEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& params)
{
LOCK(cs_main);
return (VersionBitsState(pindexPrev, params, Consensus::DEPLOYMENT_SEGWIT, versionbitscache) == THRESHOLD_ACTIVE);
}
// Compute at which vout of the block's coinbase transaction the witness
// commitment occurs, or -1 if not found.
static int GetWitnessCommitmentIndex(const CBlock& block)
{
int commitpos = -1;
for (size_t o = 0; o < block.vtx[0].vout.size(); o++) {
if (block.vtx[0].vout[o].scriptPubKey.size() >= 38 && block.vtx[0].vout[o].scriptPubKey[0] == OP_RETURN && block.vtx[0].vout[o].scriptPubKey[1] == 0x24 && block.vtx[0].vout[o].scriptPubKey[2] == 0xaa && block.vtx[0].vout[o].scriptPubKey[3] == 0x21 && block.vtx[0].vout[o].scriptPubKey[4] == 0xa9 && block.vtx[0].vout[o].scriptPubKey[5] == 0xed) {
commitpos = o;
}
}
return commitpos;
}
void UpdateUncommittedBlockStructures(CBlock& block, const CBlockIndex* pindexPrev, const Consensus::Params& consensusParams)
{
int commitpos = GetWitnessCommitmentIndex(block);
static const std::vector<unsigned char> nonce(32, 0x00);
if (commitpos != -1 && IsWitnessEnabled(pindexPrev, consensusParams) && block.vtx[0].wit.IsEmpty()) {
block.vtx[0].wit.vtxinwit.resize(1);
block.vtx[0].wit.vtxinwit[0].scriptWitness.stack.resize(1);
block.vtx[0].wit.vtxinwit[0].scriptWitness.stack[0] = nonce;
}
}
std::vector<unsigned char> GenerateCoinbaseCommitment(CBlock& block, const CBlockIndex* pindexPrev, const Consensus::Params& consensusParams)
{
std::vector<unsigned char> commitment;
int commitpos = GetWitnessCommitmentIndex(block);
bool fHaveWitness = false;
for (size_t t = 1; t < block.vtx.size(); t++) {
if (!block.vtx[t].wit.IsNull()) {
fHaveWitness = true;
break;
}
}
std::vector<unsigned char> ret(32, 0x00);
if (fHaveWitness && IsWitnessEnabled(pindexPrev, consensusParams)) {
if (commitpos == -1) {
uint256 witnessroot = BlockWitnessMerkleRoot(block, NULL);
CHash256().Write(witnessroot.begin(), 32).Write(&ret[0], 32).Finalize(witnessroot.begin());
CTxOut out;
out.nValue = 0;
out.scriptPubKey.resize(38);
out.scriptPubKey[0] = OP_RETURN;
out.scriptPubKey[1] = 0x24;
out.scriptPubKey[2] = 0xaa;
out.scriptPubKey[3] = 0x21;
out.scriptPubKey[4] = 0xa9;
out.scriptPubKey[5] = 0xed;
memcpy(&out.scriptPubKey[6], witnessroot.begin(), 32);
commitment = std::vector<unsigned char>(out.scriptPubKey.begin(), out.scriptPubKey.end());
const_cast<std::vector<CTxOut>*>(&block.vtx[0].vout)->push_back(out);
block.vtx[0].UpdateHash();
}
}
UpdateUncommittedBlockStructures(block, pindexPrev, consensusParams);
return commitment;
}
bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& state, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev, int64_t nAdjustedTime)
{
const int nHeight = pindexPrev == NULL ? 0 : pindexPrev->nHeight + 1;
// Check proof of work
if (block.nBits != GetNextWorkRequired(pindexPrev, &block, consensusParams))
return state.DoS(100, false, REJECT_INVALID, "bad-diffbits", false, "incorrect proof of work");
// Check timestamp against prev
if (block.GetBlockTime() <= pindexPrev->GetMedianTimePast())
return state.Invalid(false, REJECT_INVALID, "time-too-old", "block's timestamp is too early");
// Check timestamp
if (block.GetBlockTime() > nAdjustedTime + 2 * 60 * 60)
return state.Invalid(false, REJECT_INVALID, "time-too-new", "block timestamp too far in the future");
// Reject outdated version blocks when 95% (75% on testnet) of the network has upgraded:
// check for version 2, 3 and 4 upgrades
if((block.nVersion < 2 && nHeight >= consensusParams.BIP34Height) ||
(block.nVersion < 3 && nHeight >= consensusParams.BIP66Height) ||
(block.nVersion < 4 && nHeight >= consensusParams.BIP65Height))
return state.Invalid(false, REJECT_OBSOLETE, strprintf("bad-version(0x%08x)", block.nVersion),
strprintf("rejected nVersion=0x%08x block", block.nVersion));
return true;
}
bool ContextualCheckBlock(const CBlock& block, CValidationState& state, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev)
{
const int nHeight = pindexPrev == NULL ? 0 : pindexPrev->nHeight + 1;
// Start enforcing BIP113 (Median Time Past) using versionbits logic.
int nLockTimeFlags = 0;
if (VersionBitsState(pindexPrev, consensusParams, Consensus::DEPLOYMENT_CSV, versionbitscache) == THRESHOLD_ACTIVE) {
nLockTimeFlags |= LOCKTIME_MEDIAN_TIME_PAST;
}
int64_t nLockTimeCutoff = (nLockTimeFlags & LOCKTIME_MEDIAN_TIME_PAST)
? pindexPrev->GetMedianTimePast()
: block.GetBlockTime();
// Check that all transactions are finalized
for (const auto& tx : block.vtx) {
if (!IsFinalTx(tx, nHeight, nLockTimeCutoff)) {
return state.DoS(10, false, REJECT_INVALID, "bad-txns-nonfinal", false, "non-final transaction");
}
}
// Enforce rule that the coinbase starts with serialized block height
if (nHeight >= consensusParams.BIP34Height)
{
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, false, REJECT_INVALID, "bad-cb-height", false, "block height mismatch in coinbase");
}
}
// Validation for witness commitments.
// * We compute the witness hash (which is the hash including witnesses) of all the block's transactions, except the
// coinbase (where 0x0000....0000 is used instead).
// * The coinbase scriptWitness is a stack of a single 32-byte vector, containing a witness nonce (unconstrained).
// * We build a merkle tree with all those witness hashes as leaves (similar to the hashMerkleRoot in the block header).
// * There must be at least one output whose scriptPubKey is a single 36-byte push, the first 4 bytes of which are
// {0xaa, 0x21, 0xa9, 0xed}, and the following 32 bytes are SHA256^2(witness root, witness nonce). In case there are
// multiple, the last one is used.
bool fHaveWitness = false;
if (VersionBitsState(pindexPrev, consensusParams, Consensus::DEPLOYMENT_SEGWIT, versionbitscache) == THRESHOLD_ACTIVE) {
int commitpos = GetWitnessCommitmentIndex(block);
if (commitpos != -1) {
bool malleated = false;
uint256 hashWitness = BlockWitnessMerkleRoot(block, &malleated);
// The malleation check is ignored; as the transaction tree itself
// already does not permit it, it is impossible to trigger in the
// witness tree.
if (block.vtx[0].wit.vtxinwit.size() != 1 || block.vtx[0].wit.vtxinwit[0].scriptWitness.stack.size() != 1 || block.vtx[0].wit.vtxinwit[0].scriptWitness.stack[0].size() != 32) {
return state.DoS(100, false, REJECT_INVALID, "bad-witness-nonce-size", true, strprintf("%s : invalid witness nonce size", __func__));
}
CHash256().Write(hashWitness.begin(), 32).Write(&block.vtx[0].wit.vtxinwit[0].scriptWitness.stack[0][0], 32).Finalize(hashWitness.begin());
if (memcmp(hashWitness.begin(), &block.vtx[0].vout[commitpos].scriptPubKey[6], 32)) {
return state.DoS(100, false, REJECT_INVALID, "bad-witness-merkle-match", true, strprintf("%s : witness merkle commitment mismatch", __func__));
}
fHaveWitness = true;
}
}
// No witness data is allowed in blocks that don't commit to witness data, as this would otherwise leave room for spam
if (!fHaveWitness) {
for (size_t i = 0; i < block.vtx.size(); i++) {
if (!block.vtx[i].wit.IsNull()) {
return state.DoS(100, false, REJECT_INVALID, "unexpected-witness", true, strprintf("%s : unexpected witness data found", __func__));
}
}
}
// After the coinbase witness nonce and commitment are verified,
// we can check if the block weight passes (before we've checked the
// coinbase witness, it would be possible for the weight to be too
// large by filling up the coinbase witness, which doesn't change
// the block hash, so we couldn't mark the block as permanently
// failed).
if (GetBlockWeight(block) > MAX_BLOCK_WEIGHT) {
return state.DoS(100, false, REJECT_INVALID, "bad-blk-weight", false, strprintf("%s : weight limit failed", __func__));
}
return true;
}
static bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, const CChainParams& chainparams, CBlockIndex** ppindex=NULL)
{
AssertLockHeld(cs_main);
// Check for duplicate
uint256 hash = block.GetHash();
BlockMap::iterator miSelf = mapBlockIndex.find(hash);
CBlockIndex *pindex = NULL;
if (hash != chainparams.GetConsensus().hashGenesisBlock) {
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 %s is marked invalid", __func__, hash.ToString()), 0, "duplicate");
return true;
}
if (!CheckBlockHeader(block, state, chainparams.GetConsensus()))
return error("%s: Consensus::CheckBlockHeader: %s, %s", __func__, hash.ToString(), FormatStateMessage(state));
// Get prev block index
CBlockIndex* pindexPrev = NULL;
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");
assert(pindexPrev);
if (fCheckpointsEnabled && !CheckIndexAgainstCheckpoint(pindexPrev, state, chainparams, hash))
return error("%s: CheckIndexAgainstCheckpoint(): %s", __func__, state.GetRejectReason().c_str());
if (!ContextualCheckBlockHeader(block, state, chainparams.GetConsensus(), pindexPrev, GetAdjustedTime()))
return error("%s: Consensus::ContextualCheckBlockHeader: %s, %s", __func__, hash.ToString(), FormatStateMessage(state));
}
if (pindex == NULL)
pindex = AddToBlockIndex(block);
if (ppindex)
*ppindex = pindex;
return true;
}
/** Store block on disk. If dbp is non-NULL, the file is known to already reside on disk */
static bool AcceptBlock(const CBlock& block, CValidationState& state, const CChainParams& chainparams, CBlockIndex** ppindex, bool fRequested, const CDiskBlockPos* dbp, bool* fNewBlock)
{
if (fNewBlock) *fNewBlock = false;
AssertLockHeld(cs_main);
CBlockIndex *pindexDummy = NULL;
CBlockIndex *&pindex = ppindex ? *ppindex : pindexDummy;
if (!AcceptBlockHeader(block, state, chainparams, &pindex))
return false;
// Try to process all requested blocks that we don't have, but only
// process an unrequested block if it's new and has enough work to
// advance our tip, and isn't too many blocks ahead.
bool fAlreadyHave = pindex->nStatus & BLOCK_HAVE_DATA;
bool fHasMoreWork = (chainActive.Tip() ? pindex->nChainWork > chainActive.Tip()->nChainWork : true);
// Blocks that are too out-of-order needlessly limit the effectiveness of
// pruning, because pruning will not delete block files that contain any
// blocks which are too close in height to the tip. Apply this test
// regardless of whether pruning is enabled; it should generally be safe to
// not process unrequested blocks.
bool fTooFarAhead = (pindex->nHeight > int(chainActive.Height() + MIN_BLOCKS_TO_KEEP));
// TODO: deal better with return value and error conditions for duplicate
// and unrequested blocks.
if (fAlreadyHave) return true;
if (!fRequested) { // If we didn't ask for it:
if (pindex->nTx != 0) return true; // This is a previously-processed block that was pruned
if (!fHasMoreWork) return true; // Don't process less-work chains
if (fTooFarAhead) return true; // Block height is too high
}
if (fNewBlock) *fNewBlock = true;
if (!CheckBlock(block, state, chainparams.GetConsensus(), GetAdjustedTime()) ||
!ContextualCheckBlock(block, state, chainparams.GetConsensus(), pindex->pprev)) {
if (state.IsInvalid() && !state.CorruptionPossible()) {
pindex->nStatus |= BLOCK_FAILED_VALID;
setDirtyBlockIndex.insert(pindex);
}
return error("%s: %s", __func__, FormatStateMessage(state));
}
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, chainparams.MessageStart()))
AbortNode(state, "Failed to write block");
if (!ReceivedBlockTransactions(block, state, pindex, blockPos))
return error("AcceptBlock(): ReceivedBlockTransactions failed");
} catch (const std::runtime_error& e) {
return AbortNode(state, std::string("System error: ") + e.what());
}
if (fCheckForPruning)
FlushStateToDisk(state, FLUSH_STATE_NONE); // we just allocated more disk space for block files
return true;
}
bool ProcessNewBlock(CValidationState& state, const CChainParams& chainparams, CNode* pfrom, const CBlock* pblock, bool fForceProcessing, const CDiskBlockPos* dbp)
{
{
LOCK(cs_main);
bool fRequested = MarkBlockAsReceived(pblock->GetHash());
fRequested |= fForceProcessing;
// Store to disk
CBlockIndex *pindex = NULL;
bool fNewBlock = false;
bool ret = AcceptBlock(*pblock, state, chainparams, &pindex, fRequested, dbp, &fNewBlock);
if (pindex && pfrom) {
mapBlockSource[pindex->GetBlockHash()] = pfrom->GetId();
if (fNewBlock) pfrom->nLastBlockTime = GetTime();
}
CheckBlockIndex(chainparams.GetConsensus());
if (!ret)
return error("%s: AcceptBlock FAILED", __func__);
}
NotifyHeaderTip();
if (!ActivateBestChain(state, chainparams, pblock))
return error("%s: ActivateBestChain failed", __func__);
return true;
}
bool TestBlockValidity(CValidationState& state, const CChainParams& chainparams, const CBlock& block, CBlockIndex* pindexPrev, bool fCheckPOW, bool fCheckMerkleRoot)
{
AssertLockHeld(cs_main);
assert(pindexPrev && pindexPrev == chainActive.Tip());
if (fCheckpointsEnabled && !CheckIndexAgainstCheckpoint(pindexPrev, state, chainparams, block.GetHash()))
return error("%s: CheckIndexAgainstCheckpoint(): %s", __func__, state.GetRejectReason().c_str());
CCoinsViewCache viewNew(pcoinsTip);
CBlockIndex indexDummy(block);
indexDummy.pprev = pindexPrev;
indexDummy.nHeight = pindexPrev->nHeight + 1;
// NOTE: CheckBlockHeader is called by CheckBlock
if (!ContextualCheckBlockHeader(block, state, chainparams.GetConsensus(), pindexPrev, GetAdjustedTime()))
return error("%s: Consensus::ContextualCheckBlockHeader: %s", __func__, FormatStateMessage(state));
if (!CheckBlock(block, state, chainparams.GetConsensus(), fCheckPOW, fCheckMerkleRoot))
return error("%s: Consensus::CheckBlock: %s", __func__, FormatStateMessage(state));
if (!ContextualCheckBlock(block, state, chainparams.GetConsensus(), pindexPrev))
return error("%s: Consensus::ContextualCheckBlock: %s", __func__, FormatStateMessage(state));
if (!ConnectBlock(block, state, &indexDummy, viewNew, chainparams, true))
return false;
assert(state.IsValid());
return true;
}
/**
* BLOCK PRUNING CODE
*/
/* Calculate the amount of disk space the block & undo files currently use */
uint64_t CalculateCurrentUsage()
{
uint64_t retval = 0;
BOOST_FOREACH(const CBlockFileInfo &file, vinfoBlockFile) {
retval += file.nSize + file.nUndoSize;
}
return retval;
}
/* Prune a block file (modify associated database entries)*/
void PruneOneBlockFile(const int fileNumber)
{
for (BlockMap::iterator it = mapBlockIndex.begin(); it != mapBlockIndex.end(); ++it) {
CBlockIndex* pindex = it->second;
if (pindex->nFile == fileNumber) {
pindex->nStatus &= ~BLOCK_HAVE_DATA;
pindex->nStatus &= ~BLOCK_HAVE_UNDO;
pindex->nFile = 0;
pindex->nDataPos = 0;
pindex->nUndoPos = 0;
setDirtyBlockIndex.insert(pindex);
// Prune from mapBlocksUnlinked -- any block we prune would have
// to be downloaded again in order to consider its chain, at which
// point it would be considered as a candidate for
// mapBlocksUnlinked or setBlockIndexCandidates.
std::pair<std::multimap<CBlockIndex*, CBlockIndex*>::iterator, std::multimap<CBlockIndex*, CBlockIndex*>::iterator> range = mapBlocksUnlinked.equal_range(pindex->pprev);
while (range.first != range.second) {
std::multimap<CBlockIndex *, CBlockIndex *>::iterator _it = range.first;
range.first++;
if (_it->second == pindex) {
mapBlocksUnlinked.erase(_it);
}
}
}
}
vinfoBlockFile[fileNumber].SetNull();
setDirtyFileInfo.insert(fileNumber);
}
void UnlinkPrunedFiles(std::set<int>& setFilesToPrune)
{
for (set<int>::iterator it = setFilesToPrune.begin(); it != setFilesToPrune.end(); ++it) {
CDiskBlockPos pos(*it, 0);
boost::filesystem::remove(GetBlockPosFilename(pos, "blk"));
boost::filesystem::remove(GetBlockPosFilename(pos, "rev"));
LogPrintf("Prune: %s deleted blk/rev (%05u)\n", __func__, *it);
}
}
/* Calculate the block/rev files that should be deleted to remain under target*/
void FindFilesToPrune(std::set<int>& setFilesToPrune, uint64_t nPruneAfterHeight)
{
LOCK2(cs_main, cs_LastBlockFile);
if (chainActive.Tip() == NULL || nPruneTarget == 0) {
return;
}
if ((uint64_t)chainActive.Tip()->nHeight <= nPruneAfterHeight) {
return;
}
unsigned int nLastBlockWeCanPrune = chainActive.Tip()->nHeight - MIN_BLOCKS_TO_KEEP;
uint64_t nCurrentUsage = CalculateCurrentUsage();
// We don't check to prune until after we've allocated new space for files
// So we should leave a buffer under our target to account for another allocation
// before the next pruning.
uint64_t nBuffer = BLOCKFILE_CHUNK_SIZE + UNDOFILE_CHUNK_SIZE;
uint64_t nBytesToPrune;
int count=0;
if (nCurrentUsage + nBuffer >= nPruneTarget) {
for (int fileNumber = 0; fileNumber < nLastBlockFile; fileNumber++) {
nBytesToPrune = vinfoBlockFile[fileNumber].nSize + vinfoBlockFile[fileNumber].nUndoSize;
if (vinfoBlockFile[fileNumber].nSize == 0)
continue;
if (nCurrentUsage + nBuffer < nPruneTarget) // are we below our target?
break;
// don't prune files that could have a block within MIN_BLOCKS_TO_KEEP of the main chain's tip but keep scanning
if (vinfoBlockFile[fileNumber].nHeightLast > nLastBlockWeCanPrune)
continue;
PruneOneBlockFile(fileNumber);
// Queue up the files for removal
setFilesToPrune.insert(fileNumber);
nCurrentUsage -= nBytesToPrune;
count++;
}
}
LogPrint("prune", "Prune: target=%dMiB actual=%dMiB diff=%dMiB max_prune_height=%d removed %d blk/rev pairs\n",
nPruneTarget/1024/1024, nCurrentUsage/1024/1024,
((int64_t)nPruneTarget - (int64_t)nCurrentUsage)/1024/1024,
nLastBlockWeCanPrune, count);
}
bool CheckDiskSpace(uint64_t nAdditionalBytes)
{
uint64_t nFreeBytesAvailable = boost::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.IsNull())
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(std::string(__func__) + ": new CBlockIndex failed");
mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
pindexNew->phashBlock = &((*mi).first);
return pindexNew;
}
bool static LoadBlockIndexDB()
{
const CChainParams& chainparams = Params();
if (!pblocktree->LoadBlockIndexGuts(InsertBlockIndex))
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);
// We can link the chain of blocks for which we've received transactions at some point.
// Pruned nodes may have deleted the block.
if (pindex->nTx > 0) {
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 have ever pruned block & undo files
pblocktree->ReadFlag("prunedblockfiles", fHavePruned);
if (fHavePruned)
LogPrintf("LoadBlockIndexDB(): Block files have previously been pruned\n");
// 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("%s: transaction index %s\n", __func__, 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("%s: hashBestChain=%s height=%d date=%s progress=%f\n", __func__,
chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(),
DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()),
Checkpoints::GuessVerificationProgress(chainparams.Checkpoints(), chainActive.Tip()));
return true;
}
CVerifyDB::CVerifyDB()
{
uiInterface.ShowProgress(_("Verifying blocks..."), 0);
}
CVerifyDB::~CVerifyDB()
{
uiInterface.ShowProgress("", 100);
}
bool CVerifyDB::VerifyDB(const CChainParams& chainparams, 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;
int reportDone = 0;
LogPrintf("[0%%]...");
for (CBlockIndex* pindex = chainActive.Tip(); pindex && pindex->pprev; pindex = pindex->pprev)
{
boost::this_thread::interruption_point();
int percentageDone = std::max(1, std::min(99, (int)(((double)(chainActive.Height() - pindex->nHeight)) / (double)nCheckDepth * (nCheckLevel >= 4 ? 50 : 100))));
if (reportDone < percentageDone/10) {
// report every 10% step
LogPrintf("[%d%%]...", percentageDone);
reportDone = percentageDone/10;
}
uiInterface.ShowProgress(_("Verifying blocks..."), percentageDone);
if (pindex->nHeight < chainActive.Height()-nCheckDepth)
break;
if (fPruneMode && !(pindex->nStatus & BLOCK_HAVE_DATA)) {
// If pruning, only go back as far as we have data.
LogPrintf("VerifyDB(): block verification stopping at height %d (pruning, no data)\n", pindex->nHeight);
break;
}
CBlock block;
// check level 0: read from disk
if (!ReadBlockFromDisk(block, pindex, chainparams.GetConsensus()))
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, chainparams.GetConsensus()))
return error("%s: *** found bad block at %d, hash=%s (%s)\n", __func__,
pindex->nHeight, pindex->GetBlockHash().ToString(), FormatStateMessage(state));
// check level 2: verify undo validity
if (nCheckLevel >= 2 && pindex) {
CBlockUndo undo;
CDiskBlockPos pos = pindex->GetUndoPos();
if (!pos.IsNull()) {
if (!UndoReadFromDisk(undo, 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.DynamicMemoryUsage() + pcoinsTip->DynamicMemoryUsage()) <= nCoinCacheUsage) {
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, chainparams.GetConsensus()))
return error("VerifyDB(): *** ReadBlockFromDisk failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
if (!ConnectBlock(block, state, pindex, coins, chainparams))
return error("VerifyDB(): *** found unconnectable block at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
}
}
LogPrintf("[DONE].\n");
LogPrintf("No coin database inconsistencies in last %i blocks (%i transactions)\n", chainActive.Height() - pindexState->nHeight, nGoodTransactions);
return true;
}
bool RewindBlockIndex(const CChainParams& params)
{
LOCK(cs_main);
int nHeight = 1;
while (nHeight <= chainActive.Height()) {
if (IsWitnessEnabled(chainActive[nHeight - 1], params.GetConsensus()) && !(chainActive[nHeight]->nStatus & BLOCK_OPT_WITNESS)) {
break;
}
nHeight++;
}
// nHeight is now the height of the first insufficiently-validated block, or tipheight + 1
CValidationState state;
CBlockIndex* pindex = chainActive.Tip();
while (chainActive.Height() >= nHeight) {
if (fPruneMode && !(chainActive.Tip()->nStatus & BLOCK_HAVE_DATA)) {
// If pruning, don't try rewinding past the HAVE_DATA point;
// since older blocks can't be served anyway, there's
// no need to walk further, and trying to DisconnectTip()
// will fail (and require a needless reindex/redownload
// of the blockchain).
break;
}
if (!DisconnectTip(state, params, true)) {
return error("RewindBlockIndex: unable to disconnect block at height %i", pindex->nHeight);
}
// Occasionally flush state to disk.
if (!FlushStateToDisk(state, FLUSH_STATE_PERIODIC))
return false;
}
// Reduce validity flag and have-data flags.
// We do this after actual disconnecting, otherwise we'll end up writing the lack of data
// to disk before writing the chainstate, resulting in a failure to continue if interrupted.
for (BlockMap::iterator it = mapBlockIndex.begin(); it != mapBlockIndex.end(); it++) {
CBlockIndex* pindexIter = it->second;
// Note: If we encounter an insufficiently validated block that
// is on chainActive, it must be because we are a pruning node, and
// this block or some successor doesn't HAVE_DATA, so we were unable to
// rewind all the way. Blocks remaining on chainActive at this point
// must not have their validity reduced.
if (IsWitnessEnabled(pindexIter->pprev, params.GetConsensus()) && !(pindexIter->nStatus & BLOCK_OPT_WITNESS) && !chainActive.Contains(pindexIter)) {
// Reduce validity
pindexIter->nStatus = std::min<unsigned int>(pindexIter->nStatus & BLOCK_VALID_MASK, BLOCK_VALID_TREE) | (pindexIter->nStatus & ~BLOCK_VALID_MASK);
// Remove have-data flags.
pindexIter->nStatus &= ~(BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO);
// Remove storage location.
pindexIter->nFile = 0;
pindexIter->nDataPos = 0;
pindexIter->nUndoPos = 0;
// Remove various other things
pindexIter->nTx = 0;
pindexIter->nChainTx = 0;
pindexIter->nSequenceId = 0;
// Make sure it gets written.
setDirtyBlockIndex.insert(pindexIter);
// Update indexes
setBlockIndexCandidates.erase(pindexIter);
std::pair<std::multimap<CBlockIndex*, CBlockIndex*>::iterator, std::multimap<CBlockIndex*, CBlockIndex*>::iterator> ret = mapBlocksUnlinked.equal_range(pindexIter->pprev);
while (ret.first != ret.second) {
if (ret.first->second == pindexIter) {
mapBlocksUnlinked.erase(ret.first++);
} else {
++ret.first;
}
}
} else if (pindexIter->IsValid(BLOCK_VALID_TRANSACTIONS) && pindexIter->nChainTx) {
setBlockIndexCandidates.insert(pindexIter);
}
}
PruneBlockIndexCandidates();
CheckBlockIndex(params.GetConsensus());
if (!FlushStateToDisk(state, FLUSH_STATE_ALWAYS)) {
return false;
}
return true;
}
void UnloadBlockIndex()
{
LOCK(cs_main);
setBlockIndexCandidates.clear();
chainActive.SetTip(NULL);
pindexBestInvalid = NULL;
pindexBestHeader = NULL;
mempool.clear();
mapOrphanTransactions.clear();
mapOrphanTransactionsByPrev.clear();
nSyncStarted = 0;
mapBlocksUnlinked.clear();
vinfoBlockFile.clear();
nLastBlockFile = 0;
nBlockSequenceId = 1;
mapBlockSource.clear();
mapBlocksInFlight.clear();
nPreferredDownload = 0;
setDirtyBlockIndex.clear();
setDirtyFileInfo.clear();
mapNodeState.clear();
recentRejects.reset(NULL);
versionbitscache.Clear();
for (int b = 0; b < VERSIONBITS_NUM_BITS; b++) {
warningcache[b].clear();
}
BOOST_FOREACH(BlockMap::value_type& entry, mapBlockIndex) {
delete entry.second;
}
mapBlockIndex.clear();
fHavePruned = false;
}
bool LoadBlockIndex()
{
// Load block index from databases
if (!fReindex && !LoadBlockIndexDB())
return false;
return true;
}
bool InitBlockIndex(const CChainParams& chainparams)
{
LOCK(cs_main);
// Initialize global variables that cannot be constructed at startup.
recentRejects.reset(new CRollingBloomFilter(120000, 0.000001));
// 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", DEFAULT_TXINDEX);
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&>(chainparams.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, chainparams.MessageStart()))
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");
// Force a chainstate write so that when we VerifyDB in a moment, it doesn't check stale data
return FlushStateToDisk(state, FLUSH_STATE_ALWAYS);
} catch (const std::runtime_error& e) {
return error("LoadBlockIndex(): failed to initialize block database: %s", e.what());
}
}
return true;
}
bool LoadExternalBlockFile(const CChainParams& chainparams, 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_SERIALIZED_SIZE, MAX_BLOCK_SERIALIZED_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[CMessageHeader::MESSAGE_START_SIZE];
blkdat.FindByte(chainparams.MessageStart()[0]);
nRewind = blkdat.GetPos()+1;
blkdat >> FLATDATA(buf);
if (memcmp(buf, chainparams.MessageStart(), CMessageHeader::MESSAGE_START_SIZE))
continue;
// read size
blkdat >> nSize;
if (nSize < 80 || nSize > MAX_BLOCK_SERIALIZED_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 != chainparams.GetConsensus().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) {
LOCK(cs_main);
CValidationState state;
if (AcceptBlock(block, state, chainparams, NULL, true, dbp, NULL))
nLoaded++;
if (state.IsError())
break;
} else if (hash != chainparams.GetConsensus().hashGenesisBlock && mapBlockIndex[hash]->nHeight % 1000 == 0) {
LogPrint("reindex", "Block Import: already had block %s at height %d\n", hash.ToString(), mapBlockIndex[hash]->nHeight);
}
// Activate the genesis block so normal node progress can continue
if (hash == chainparams.GetConsensus().hashGenesisBlock) {
CValidationState state;
if (!ActivateBestChain(state, chainparams)) {
break;
}
}
NotifyHeaderTip();
// 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, chainparams.GetConsensus()))
{
LogPrint("reindex", "%s: Processing out of order child %s of %s\n", __func__, block.GetHash().ToString(),
head.ToString());
LOCK(cs_main);
CValidationState dummy;
if (AcceptBlock(block, dummy, chainparams, NULL, true, &it->second, NULL))
{
nLoaded++;
queue.push_back(block.GetHash());
}
}
range.first++;
mapBlocksUnknownParent.erase(it);
NotifyHeaderTip();
}
}
} catch (const std::exception& e) {
LogPrintf("%s: Deserialize or I/O error - %s\n", __func__, e.what());
}
}
} catch (const 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(const Consensus::Params& consensusParams)
{
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* pindexFirstNeverProcessed = NULL; // Oldest ancestor of pindex for which nTx == 0.
CBlockIndex* pindexFirstNotTreeValid = NULL; // Oldest ancestor of pindex which does not have BLOCK_VALID_TREE (regardless of being valid or not).
CBlockIndex* pindexFirstNotTransactionsValid = NULL; // Oldest ancestor of pindex which does not have BLOCK_VALID_TRANSACTIONS (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 (pindexFirstNeverProcessed == NULL && pindex->nTx == 0) pindexFirstNeverProcessed = pindex;
if (pindex->pprev != NULL && pindexFirstNotTreeValid == NULL && (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_TREE) pindexFirstNotTreeValid = pindex;
if (pindex->pprev != NULL && pindexFirstNotTransactionsValid == NULL && (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_TRANSACTIONS) pindexFirstNotTransactionsValid = 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() == consensusParams.hashGenesisBlock); // Genesis block's hash must match.
assert(pindex == chainActive.Genesis()); // The current active chain's genesis block must be this block.
}
if (pindex->nChainTx == 0) assert(pindex->nSequenceId <= 0); // nSequenceId can't be set positive for blocks that aren't linked (negative is used for preciousblock)
// VALID_TRANSACTIONS is equivalent to nTx > 0 for all nodes (whether or not pruning has occurred).
// HAVE_DATA is only equivalent to nTx > 0 (or VALID_TRANSACTIONS) if no pruning has occurred.
if (!fHavePruned) {
// If we've never pruned, then HAVE_DATA should be equivalent to nTx > 0
assert(!(pindex->nStatus & BLOCK_HAVE_DATA) == (pindex->nTx == 0));
assert(pindexFirstMissing == pindexFirstNeverProcessed);
} else {
// If we have pruned, then we can only say that HAVE_DATA implies nTx > 0
if (pindex->nStatus & BLOCK_HAVE_DATA) assert(pindex->nTx > 0);
}
if (pindex->nStatus & BLOCK_HAVE_UNDO) assert(pindex->nStatus & BLOCK_HAVE_DATA);
assert(((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TRANSACTIONS) == (pindex->nTx > 0)); // This is pruning-independent.
// All parents having had data (at some point) is equivalent to all parents being VALID_TRANSACTIONS, which is equivalent to nChainTx being set.
assert((pindexFirstNeverProcessed != NULL) == (pindex->nChainTx == 0)); // nChainTx != 0 is used to signal that all parent blocks have been processed (but may have been pruned).
assert((pindexFirstNotTransactionsValid != NULL) == (pindex->nChainTx == 0));
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()) && pindexFirstNeverProcessed == NULL) {
if (pindexFirstInvalid == NULL) {
// If this block sorts at least as good as the current tip and
// is valid and we have all data for its parents, it must be in
// setBlockIndexCandidates. chainActive.Tip() must also be there
// even if some data has been pruned.
if (pindexFirstMissing == NULL || pindex == chainActive.Tip()) {
assert(setBlockIndexCandidates.count(pindex));
}
// If some parent is missing, then it could be that this block was in
// setBlockIndexCandidates but had to be removed because of the missing data.
// In this case it must be in mapBlocksUnlinked -- see test below.
}
} else { // If this block sorts worse than the current tip or some ancestor's block has never been seen, 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) && pindexFirstNeverProcessed != NULL && pindexFirstInvalid == NULL) {
// If this block has block data available, some parent was never received, and has no invalid parents, it must be in mapBlocksUnlinked.
assert(foundInUnlinked);
}
if (!(pindex->nStatus & BLOCK_HAVE_DATA)) assert(!foundInUnlinked); // Can't be in mapBlocksUnlinked if we don't HAVE_DATA
if (pindexFirstMissing == NULL) assert(!foundInUnlinked); // We aren't missing data for any parent -- cannot be in mapBlocksUnlinked.
if (pindex->pprev && (pindex->nStatus & BLOCK_HAVE_DATA) && pindexFirstNeverProcessed == NULL && pindexFirstMissing != NULL) {
// We HAVE_DATA for this block, have received data for all parents at some point, but we're currently missing data for some parent.
assert(fHavePruned); // We must have pruned.
// This block may have entered mapBlocksUnlinked if:
// - it has a descendant that at some point had more work than the
// tip, and
// - we tried switching to that descendant but were missing
// data for some intermediate block between chainActive and the
// tip.
// So if this block is itself better than chainActive.Tip() and it wasn't in
// setBlockIndexCandidates, then it must be in mapBlocksUnlinked.
if (!CBlockIndexWorkComparator()(pindex, chainActive.Tip()) && setBlockIndexCandidates.count(pindex) == 0) {
if (pindexFirstInvalid == NULL) {
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 == pindexFirstNeverProcessed) pindexFirstNeverProcessed = NULL;
if (pindex == pindexFirstNotTreeValid) pindexFirstNotTreeValid = NULL;
if (pindex == pindexFirstNotTransactionsValid) pindexFirstNotTransactionsValid = 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());
}
std::string GetWarnings(const std::string& strFor)
{
string strStatusBar;
string strRPC;
string strGUI;
const string uiAlertSeperator = "<hr />";
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";
strGUI = _("This is a pre-release test build - use at your own risk - do not use for mining or merchant applications");
}
if (GetBoolArg("-testsafemode", DEFAULT_TESTSAFEMODE))
strStatusBar = strRPC = strGUI = "testsafemode enabled";
// Misc warnings like out of disk space and clock is wrong
if (strMiscWarning != "")
{
strStatusBar = strMiscWarning;
strGUI += (strGUI.empty() ? "" : uiAlertSeperator) + strMiscWarning;
}
if (fLargeWorkForkFound)
{
strStatusBar = strRPC = "Warning: The network does not appear to fully agree! Some miners appear to be experiencing issues.";
strGUI += (strGUI.empty() ? "" : uiAlertSeperator) + _("Warning: The network does not appear to fully agree! Some miners appear to be experiencing issues.");
}
else if (fLargeWorkInvalidChainFound)
{
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.";
strGUI += (strGUI.empty() ? "" : uiAlertSeperator) + _("Warning: We do not appear to fully agree with our peers! You may need to upgrade, or other nodes may need to upgrade.");
}
if (strFor == "gui")
return strGUI;
else if (strFor == "statusbar")
return strStatusBar;
else if (strFor == "rpc")
return strRPC;
assert(!"GetWarnings(): invalid parameter");
return "error";
}
//////////////////////////////////////////////////////////////////////////////
//
// blockchain -> download logic notification
//
void PeerLogicValidation::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) {
const int nNewHeight = pindexNew->nHeight;
connman->SetBestHeight(nNewHeight);
if (!fInitialDownload) {
// Find the hashes of all blocks that weren't previously in the best chain.
std::vector<uint256> vHashes;
const CBlockIndex *pindexToAnnounce = pindexNew;
while (pindexToAnnounce != pindexFork) {
vHashes.push_back(pindexToAnnounce->GetBlockHash());
pindexToAnnounce = pindexToAnnounce->pprev;
if (vHashes.size() == MAX_BLOCKS_TO_ANNOUNCE) {
// Limit announcements in case of a huge reorganization.
// Rely on the peer's synchronization mechanism in that case.
break;
}
}
// Relay inventory, but don't relay old inventory during initial block download.
connman->ForEachNode([nNewHeight, &vHashes](CNode* pnode) {
if (nNewHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 0)) {
BOOST_REVERSE_FOREACH(const uint256& hash, vHashes) {
pnode->PushBlockHash(hash);
}
}
});
}
}
void PeerLogicValidation::BlockChecked(const CBlock& block, const CValidationState& state) {
LOCK(cs_main);
const uint256 hash(block.GetHash());
std::map<uint256, NodeId>::iterator it = mapBlockSource.find(hash);
int nDoS = 0;
if (state.IsInvalid(nDoS)) {
if (it != mapBlockSource.end() && State(it->second)) {
assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes
CBlockReject reject = {(unsigned char)state.GetRejectCode(), state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), hash};
State(it->second)->rejects.push_back(reject);
if (nDoS > 0)
Misbehaving(it->second, nDoS);
}
}
if (it != mapBlockSource.end())
mapBlockSource.erase(it);
}
//////////////////////////////////////////////////////////////////////////////
//
// Messages
//
bool static AlreadyHave(const CInv& inv) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
switch (inv.type)
{
case MSG_TX:
case MSG_WITNESS_TX:
{
assert(recentRejects);
if (chainActive.Tip()->GetBlockHash() != hashRecentRejectsChainTip)
{
// If the chain tip has changed previously rejected transactions
// might be now valid, e.g. due to a nLockTime'd tx becoming valid,
// or a double-spend. Reset the rejects filter and give those
// txs a second chance.
hashRecentRejectsChainTip = chainActive.Tip()->GetBlockHash();
recentRejects->reset();
}
// Use pcoinsTip->HaveCoinsInCache as a quick approximation to exclude
// requesting or processing some txs which have already been included in a block
return recentRejects->contains(inv.hash) ||
mempool.exists(inv.hash) ||
mapOrphanTransactions.count(inv.hash) ||
pcoinsTip->HaveCoinsInCache(inv.hash);
}
case MSG_BLOCK:
case MSG_WITNESS_BLOCK:
return mapBlockIndex.count(inv.hash);
}
// Don't know what it is, just say we already got one
return true;
}
static void RelayTransaction(const CTransaction& tx, CConnman& connman)
{
CInv inv(MSG_TX, tx.GetHash());
connman.ForEachNode([&inv](CNode* pnode)
{
pnode->PushInventory(inv);
});
}
static void RelayAddress(const CAddress& addr, bool fReachable, CConnman& connman)
{
int nRelayNodes = fReachable ? 2 : 1; // limited relaying of addresses outside our network(s)
// Relay to a limited number of other nodes
// Use deterministic randomness to send to the same nodes for 24 hours
// at a time so the addrKnowns of the chosen nodes prevent repeats
uint64_t hashAddr = addr.GetHash();
std::multimap<uint64_t, CNode*> mapMix;
const CSipHasher hasher = connman.GetDeterministicRandomizer(RANDOMIZER_ID_ADDRESS_RELAY).Write(hashAddr << 32).Write((GetTime() + hashAddr) / (24*60*60));
FastRandomContext insecure_rand;
auto sortfunc = [&mapMix, &hasher](CNode* pnode) {
if (pnode->nVersion >= CADDR_TIME_VERSION) {
uint64_t hashKey = CSipHasher(hasher).Write(pnode->id).Finalize();
mapMix.emplace(hashKey, pnode);
}
};
auto pushfunc = [&addr, &mapMix, &nRelayNodes, &insecure_rand] {
for (auto mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
mi->second->PushAddress(addr, insecure_rand);
};
connman.ForEachNodeThen(std::move(sortfunc), std::move(pushfunc));
}
void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParams, CConnman& connman)
{
std::deque<CInv>::iterator it = pfrom->vRecvGetData.begin();
unsigned int nMaxSendBufferSize = connman.GetSendBufferSize();
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 >= nMaxSendBufferSize)
break;
const CInv &inv = *it;
{
boost::this_thread::interruption_point();
it++;
if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK || inv.type == MSG_CMPCT_BLOCK || inv.type == MSG_WITNESS_BLOCK)
{
bool send = false;
BlockMap::iterator mi = mapBlockIndex.find(inv.hash);
if (mi != mapBlockIndex.end())
{
if (chainActive.Contains(mi->second)) {
send = true;
} else {
static const int nOneMonth = 30 * 24 * 60 * 60;
// To prevent fingerprinting attacks, only send blocks outside of the active
// chain if they are valid, and no more than a month older (both in time, and in
// best equivalent proof of work) than the best header chain we know about.
send = mi->second->IsValid(BLOCK_VALID_SCRIPTS) && (pindexBestHeader != NULL) &&
(pindexBestHeader->GetBlockTime() - mi->second->GetBlockTime() < nOneMonth) &&
(GetBlockProofEquivalentTime(*pindexBestHeader, *mi->second, *pindexBestHeader, consensusParams) < nOneMonth);
if (!send) {
LogPrintf("%s: ignoring request from peer=%i for old block that isn't in the main chain\n", __func__, pfrom->GetId());
}
}
}
// disconnect node in case we have reached the outbound limit for serving historical blocks
// never disconnect whitelisted nodes
static const int nOneWeek = 7 * 24 * 60 * 60; // assume > 1 week = historical
if (send && connman.OutboundTargetReached(true) && ( ((pindexBestHeader != NULL) && (pindexBestHeader->GetBlockTime() - mi->second->GetBlockTime() > nOneWeek)) || inv.type == MSG_FILTERED_BLOCK) && !pfrom->fWhitelisted)
{
LogPrint("net", "historical block serving limit reached, disconnect peer=%d\n", pfrom->GetId());
//disconnect node
pfrom->fDisconnect = true;
send = false;
}
// Pruned nodes may have deleted the block, so check whether
// it's available before trying to send.
if (send && (mi->second->nStatus & BLOCK_HAVE_DATA))
{
// Send block from disk
CBlock block;
if (!ReadBlockFromDisk(block, (*mi).second, consensusParams))
assert(!"cannot load block from disk");
if (inv.type == MSG_BLOCK)
pfrom->PushMessageWithFlag(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::BLOCK, block);
else if (inv.type == MSG_WITNESS_BLOCK)
pfrom->PushMessage(NetMsgType::BLOCK, block);
else if (inv.type == MSG_FILTERED_BLOCK)
{
bool sendMerkleBlock = false;
CMerkleBlock merkleBlock;
{
LOCK(pfrom->cs_filter);
if (pfrom->pfilter) {
sendMerkleBlock = true;
merkleBlock = CMerkleBlock(block, *pfrom->pfilter);
}
}
if (sendMerkleBlock) {
pfrom->PushMessage(NetMsgType::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 didn't 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)
pfrom->PushMessageWithFlag(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::TX, block.vtx[pair.first]);
}
// else
// no response
}
else if (inv.type == MSG_CMPCT_BLOCK)
{
// If a peer is asking for old blocks, we're almost guaranteed
// they wont have a useful mempool to match against a compact block,
// and we don't feel like constructing the object for them, so
// instead we respond with the full, non-compact block.
bool fPeerWantsWitness = State(pfrom->GetId())->fWantsCmpctWitness;
if (CanDirectFetch(consensusParams) && mi->second->nHeight >= chainActive.Height() - MAX_CMPCTBLOCK_DEPTH) {
CBlockHeaderAndShortTxIDs cmpctblock(block, fPeerWantsWitness);
pfrom->PushMessageWithFlag(fPeerWantsWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::CMPCTBLOCK, cmpctblock);
} else
pfrom->PushMessageWithFlag(fPeerWantsWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::BLOCK, block);
}
// Trigger the peer node 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(NetMsgType::INV, vInv);
pfrom->hashContinue.SetNull();
}
}
}
else if (inv.type == MSG_TX || inv.type == MSG_WITNESS_TX)
{
// Send stream from relay memory
bool push = false;
auto mi = mapRelay.find(inv.hash);
if (mi != mapRelay.end()) {
pfrom->PushMessageWithFlag(inv.type == MSG_TX ? SERIALIZE_TRANSACTION_NO_WITNESS : 0, NetMsgType::TX, *mi->second);
push = true;
} else if (pfrom->timeLastMempoolReq) {
auto txinfo = mempool.info(inv.hash);
// To protect privacy, do not answer getdata using the mempool when
// that TX couldn't have been INVed in reply to a MEMPOOL request.
if (txinfo.tx && txinfo.nTime <= pfrom->timeLastMempoolReq) {
pfrom->PushMessageWithFlag(inv.type == MSG_TX ? SERIALIZE_TRANSACTION_NO_WITNESS : 0, NetMsgType::TX, *txinfo.tx);
push = true;
}
}
if (!push) {
vNotFound.push_back(inv);
}
}
// Track requests for our stuff.
GetMainSignals().Inventory(inv.hash);
if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK || inv.type == MSG_CMPCT_BLOCK || inv.type == MSG_WITNESS_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(NetMsgType::NOTFOUND, vNotFound);
}
}
uint32_t GetFetchFlags(CNode* pfrom, CBlockIndex* pprev, const Consensus::Params& chainparams) {
uint32_t nFetchFlags = 0;
if ((pfrom->GetLocalServices() & NODE_WITNESS) && State(pfrom->GetId())->fHaveWitness) {
nFetchFlags |= MSG_WITNESS_FLAG;
}
return nFetchFlags;
}
bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CConnman& connman)
{
unsigned int nMaxSendBufferSize = connman.GetSendBufferSize();
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 (!(pfrom->GetLocalServices() & NODE_BLOOM) &&
(strCommand == NetMsgType::FILTERLOAD ||
strCommand == NetMsgType::FILTERADD ||
strCommand == NetMsgType::FILTERCLEAR))
{
if (pfrom->nVersion >= NO_BLOOM_VERSION) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 100);
return false;
} else {
pfrom->fDisconnect = true;
return false;
}
}
if (strCommand == NetMsgType::VERSION)
{
// Feeler connections exist only to verify if address is online.
if (pfrom->fFeeler) {
assert(pfrom->fInbound == false);
pfrom->fDisconnect = true;
}
// Each connection can only send one version message
if (pfrom->nVersion != 0)
{
pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_DUPLICATE, string("Duplicate version message"));
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 1);
return false;
}
int64_t nTime;
CAddress addrMe;
CAddress addrFrom;
uint64_t nNonce = 1;
uint64_t nServiceInt;
vRecv >> pfrom->nVersion >> nServiceInt >> nTime >> addrMe;
pfrom->nServices = ServiceFlags(nServiceInt);
if (!pfrom->fInbound)
{
connman.SetServices(pfrom->addr, pfrom->nServices);
}
if (pfrom->nServicesExpected & ~pfrom->nServices)
{
LogPrint("net", "peer=%d does not offer the expected services (%08x offered, %08x expected); disconnecting\n", pfrom->id, pfrom->nServices, pfrom->nServicesExpected);
pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_NONSTANDARD,
strprintf("Expected to offer services %08x", pfrom->nServicesExpected));
pfrom->fDisconnect = true;
return false;
}
if (pfrom->nVersion < MIN_PEER_PROTO_VERSION)
{
// disconnect from peers older than this proto version
LogPrintf("peer=%d using obsolete version %i; disconnecting\n", pfrom->id, pfrom->nVersion);
pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_OBSOLETE,
strprintf("Version must be %d or greater", MIN_PEER_PROTO_VERSION));
pfrom->fDisconnect = true;
return false;
}
if (pfrom->nVersion == 10300)
pfrom->nVersion = 300;
if (!vRecv.empty())
vRecv >> addrFrom >> nNonce;
if (!vRecv.empty()) {
vRecv >> LIMITED_STRING(pfrom->strSubVer, MAX_SUBVERSION_LENGTH);
pfrom->cleanSubVer = SanitizeString(pfrom->strSubVer);
}
if (!vRecv.empty()) {
vRecv >> pfrom->nStartingHeight;
}
{
LOCK(pfrom->cs_filter);
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 (pfrom->fInbound && !connman.CheckIncomingNonce(nNonce))
{
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);
if((pfrom->nServices & NODE_WITNESS))
{
LOCK(cs_main);
State(pfrom->GetId())->fHaveWitness = true;
}
// Potentially mark this peer as a preferred download peer.
{
LOCK(cs_main);
UpdatePreferredDownload(pfrom, State(pfrom->GetId()));
}
// Change version
pfrom->PushMessage(NetMsgType::VERACK);
pfrom->ssSend.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
if (!pfrom->fInbound)
{
// Advertise our address
if (fListen && !IsInitialBlockDownload())
{
CAddress addr = GetLocalAddress(&pfrom->addr, pfrom->GetLocalServices());
FastRandomContext insecure_rand;
if (addr.IsRoutable())
{
LogPrint("net", "ProcessMessages: advertising address %s\n", addr.ToString());
pfrom->PushAddress(addr, insecure_rand);
} else if (IsPeerAddrLocalGood(pfrom)) {
addr.SetIP(pfrom->addrLocal);
LogPrint("net", "ProcessMessages: advertising address %s\n", addr.ToString());
pfrom->PushAddress(addr, insecure_rand);
}
}
// Get recent addresses
if (pfrom->fOneShot || pfrom->nVersion >= CADDR_TIME_VERSION || connman.GetAddressCount() < 1000)
{
pfrom->PushMessage(NetMsgType::GETADDR);
pfrom->fGetAddr = true;
}
connman.MarkAddressGood(pfrom->addr);
}
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);
int64_t nTimeOffset = nTime - GetTime();
pfrom->nTimeOffset = nTimeOffset;
AddTimeData(pfrom->addr, nTimeOffset);
}
else if (pfrom->nVersion == 0)
{
// Must have a version message before anything else
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 1);
return false;
}
else if (strCommand == NetMsgType::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;
}
if (pfrom->nVersion >= SENDHEADERS_VERSION) {
// Tell our peer we prefer to receive headers rather than inv's
// We send this to non-NODE NETWORK peers as well, because even
// non-NODE NETWORK peers can announce blocks (such as pruning
// nodes)
pfrom->PushMessage(NetMsgType::SENDHEADERS);
}
if (pfrom->nVersion >= SHORT_IDS_BLOCKS_VERSION) {
// Tell our peer we are willing to provide version 1 or 2 cmpctblocks
// However, we do not request new block announcements using
// cmpctblock messages.
// We send this to non-NODE NETWORK peers as well, because
// they may wish to request compact blocks from us
bool fAnnounceUsingCMPCTBLOCK = false;
uint64_t nCMPCTBLOCKVersion = 2;
if (pfrom->GetLocalServices() & NODE_WITNESS)
pfrom->PushMessage(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion);
nCMPCTBLOCKVersion = 1;
pfrom->PushMessage(NetMsgType::SENDCMPCT, fAnnounceUsingCMPCTBLOCK, nCMPCTBLOCKVersion);
}
}
else if (strCommand == NetMsgType::ADDR)
{
vector<CAddress> vAddr;
vRecv >> vAddr;
// Don't want addr from older versions unless seeding
if (pfrom->nVersion < CADDR_TIME_VERSION && connman.GetAddressCount() > 1000)
return true;
if (vAddr.size() > 1000)
{
LOCK(cs_main);
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.nServices & REQUIRED_SERVICES) != REQUIRED_SERVICES)
continue;
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
RelayAddress(addr, fReachable, connman);
}
// Do not store addresses outside our network
if (fReachable)
vAddrOk.push_back(addr);
}
connman.AddNewAddresses(vAddrOk, pfrom->addr, 2 * 60 * 60);
if (vAddr.size() < 1000)
pfrom->fGetAddr = false;
if (pfrom->fOneShot)
pfrom->fDisconnect = true;
}
else if (strCommand == NetMsgType::SENDHEADERS)
{
LOCK(cs_main);
State(pfrom->GetId())->fPreferHeaders = true;
}
else if (strCommand == NetMsgType::SENDCMPCT)
{
bool fAnnounceUsingCMPCTBLOCK = false;
uint64_t nCMPCTBLOCKVersion = 0;
vRecv >> fAnnounceUsingCMPCTBLOCK >> nCMPCTBLOCKVersion;
if (nCMPCTBLOCKVersion == 1 || ((pfrom->GetLocalServices() & NODE_WITNESS) && nCMPCTBLOCKVersion == 2)) {
LOCK(cs_main);
// fProvidesHeaderAndIDs is used to "lock in" version of compact blocks we send (fWantsCmpctWitness)
if (!State(pfrom->GetId())->fProvidesHeaderAndIDs) {
State(pfrom->GetId())->fProvidesHeaderAndIDs = true;
State(pfrom->GetId())->fWantsCmpctWitness = nCMPCTBLOCKVersion == 2;
}
if (State(pfrom->GetId())->fWantsCmpctWitness == (nCMPCTBLOCKVersion == 2)) // ignore later version announces
State(pfrom->GetId())->fPreferHeaderAndIDs = fAnnounceUsingCMPCTBLOCK;
if (!State(pfrom->GetId())->fSupportsDesiredCmpctVersion) {
if (pfrom->GetLocalServices() & NODE_WITNESS)
State(pfrom->GetId())->fSupportsDesiredCmpctVersion = (nCMPCTBLOCKVersion == 2);
else
State(pfrom->GetId())->fSupportsDesiredCmpctVersion = (nCMPCTBLOCKVersion == 1);
}
}
}
else if (strCommand == NetMsgType::INV)
{
vector<CInv> vInv;
vRecv >> vInv;
if (vInv.size() > MAX_INV_SZ)
{
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 20);
return error("message inv size() = %u", vInv.size());
}
bool fBlocksOnly = !fRelayTxes;
// Allow whitelisted peers to send data other than blocks in blocks only mode if whitelistrelay is true
if (pfrom->fWhitelisted && GetBoolArg("-whitelistrelay", DEFAULT_WHITELISTRELAY))
fBlocksOnly = false;
LOCK(cs_main);
uint32_t nFetchFlags = GetFetchFlags(pfrom, chainActive.Tip(), chainparams.GetConsensus());
std::vector<CInv> vToFetch;
for (unsigned int nInv = 0; nInv < vInv.size(); nInv++)
{
CInv &inv = vInv[nInv];
boost::this_thread::interruption_point();
bool fAlreadyHave = AlreadyHave(inv);
LogPrint("net", "got inv: %s %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom->id);
if (inv.type == MSG_TX) {
inv.type |= nFetchFlags;
}
if (inv.type == MSG_BLOCK) {
UpdateBlockAvailability(pfrom->GetId(), inv.hash);
if (!fAlreadyHave && !fImporting && !fReindex && !mapBlocksInFlight.count(inv.hash)) {
// First request the headers preceding 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(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexBestHeader), inv.hash);
CNodeState *nodestate = State(pfrom->GetId());
if (CanDirectFetch(chainparams.GetConsensus()) &&
nodestate->nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER &&
(!IsWitnessEnabled(chainActive.Tip(), chainparams.GetConsensus()) || State(pfrom->GetId())->fHaveWitness)) {
inv.type |= nFetchFlags;
if (nodestate->fSupportsDesiredCmpctVersion)
vToFetch.push_back(CInv(MSG_CMPCT_BLOCK, inv.hash));
else
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, chainparams.GetConsensus());
}
LogPrint("net", "getheaders (%d) %s to peer=%d\n", pindexBestHeader->nHeight, inv.hash.ToString(), pfrom->id);
}
}
else
{
pfrom->AddInventoryKnown(inv);
if (fBlocksOnly)
LogPrint("net", "transaction (%s) inv sent in violation of protocol peer=%d\n", inv.hash.ToString(), pfrom->id);
else if (!fAlreadyHave && !fImporting && !fReindex && !IsInitialBlockDownload())
pfrom->AskFor(inv);
}
// Track requests for our stuff
GetMainSignals().Inventory(inv.hash);
if (pfrom->nSendSize > (nMaxSendBufferSize * 2)) {
Misbehaving(pfrom->GetId(), 50);
return error("send buffer size() = %u", pfrom->nSendSize);
}
}
if (!vToFetch.empty())
pfrom->PushMessage(NetMsgType::GETDATA, vToFetch);
}
else if (strCommand == NetMsgType::GETDATA)
{
vector<CInv> vInv;
vRecv >> vInv;
if (vInv.size() > MAX_INV_SZ)
{
LOCK(cs_main);
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, chainparams.GetConsensus(), connman);
}
else if (strCommand == NetMsgType::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.IsNull() ? "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;
}
// If pruning, don't inv blocks unless we have on disk and are likely to still have
// for some reasonable time window (1 hour) that block relay might require.
const int nPrunedBlocksLikelyToHave = MIN_BLOCKS_TO_KEEP - 3600 / chainparams.GetConsensus().nPowTargetSpacing;
if (fPruneMode && (!(pindex->nStatus & BLOCK_HAVE_DATA) || pindex->nHeight <= chainActive.Tip()->nHeight - nPrunedBlocksLikelyToHave))
{
LogPrint("net", " getblocks stopping, pruned or too old block 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
// trigger the peer to 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 == NetMsgType::GETBLOCKTXN)
{
BlockTransactionsRequest req;
vRecv >> req;
BlockMap::iterator it = mapBlockIndex.find(req.blockhash);
if (it == mapBlockIndex.end() || !(it->second->nStatus & BLOCK_HAVE_DATA)) {
LogPrintf("Peer %d sent us a getblocktxn for a block we don't have", pfrom->id);
return true;
}
if (it->second->nHeight < chainActive.Height() - MAX_BLOCKTXN_DEPTH) {
LogPrint("net", "Peer %d sent us a getblocktxn for a block > %i deep", pfrom->id, MAX_BLOCKTXN_DEPTH);
return true;
}
CBlock block;
assert(ReadBlockFromDisk(block, it->second, chainparams.GetConsensus()));
BlockTransactions resp(req);
for (size_t i = 0; i < req.indexes.size(); i++) {
if (req.indexes[i] >= block.vtx.size()) {
Misbehaving(pfrom->GetId(), 100);
LogPrintf("Peer %d sent us a getblocktxn with out-of-bounds tx indices", pfrom->id);
return true;
}
resp.txn[i] = block.vtx[req.indexes[i]];
}
pfrom->PushMessageWithFlag(State(pfrom->GetId())->fWantsCmpctWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::BLOCKTXN, resp);
}
else if (strCommand == NetMsgType::GETHEADERS)
{
CBlockLocator locator;
uint256 hashStop;
vRecv >> locator >> hashStop;
LOCK(cs_main);
if (IsInitialBlockDownload() && !pfrom->fWhitelisted) {
LogPrint("net", "Ignoring getheaders from peer=%d because node is in initial block download\n", pfrom->id);
return true;
}
CNodeState *nodestate = State(pfrom->GetId());
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.IsNull() ? "end" : hashStop.ToString(), pfrom->id);
for (; pindex; pindex = chainActive.Next(pindex))
{
vHeaders.push_back(pindex->GetBlockHeader());
if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
break;
}
// pindex can be NULL either if we sent chainActive.Tip() OR
// if our peer has chainActive.Tip() (and thus we are sending an empty
// headers message). In both cases it's safe to update
// pindexBestHeaderSent to be our tip.
nodestate->pindexBestHeaderSent = pindex ? pindex : chainActive.Tip();
pfrom->PushMessage(NetMsgType::HEADERS, vHeaders);
}
else if (strCommand == NetMsgType::TX)
{
// Stop processing the transaction early if
// We are in blocks only mode and peer is either not whitelisted or whitelistrelay is off
if (!fRelayTxes && (!pfrom->fWhitelisted || !GetBoolArg("-whitelistrelay", DEFAULT_WHITELISTRELAY)))
{
LogPrint("net", "transaction sent in violation of protocol peer=%d\n", pfrom->id);
return true;
}
deque<COutPoint> 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;
pfrom->setAskFor.erase(inv.hash);
mapAlreadyAskedFor.erase(inv.hash);
if (!AlreadyHave(inv) && AcceptToMemoryPool(mempool, state, tx, true, &fMissingInputs)) {
mempool.check(pcoinsTip);
RelayTransaction(tx, connman);
for (unsigned int i = 0; i < tx.vout.size(); i++) {
vWorkQueue.emplace_back(inv.hash, i);
}
pfrom->nLastTXTime = GetTime();
LogPrint("mempool", "AcceptToMemoryPool: peer=%d: accepted %s (poolsz %u txn, %u kB)\n",
pfrom->id,
tx.GetHash().ToString(),
mempool.size(), mempool.DynamicMemoryUsage() / 1000);
// Recursively process any orphan transactions that depended on this one
set<NodeId> setMisbehaving;
while (!vWorkQueue.empty()) {
auto itByPrev = mapOrphanTransactionsByPrev.find(vWorkQueue.front());
vWorkQueue.pop_front();
if (itByPrev == mapOrphanTransactionsByPrev.end())
continue;
for (auto mi = itByPrev->second.begin();
mi != itByPrev->second.end();
++mi)
{
const CTransaction& orphanTx = (*mi)->second.tx;
const uint256& orphanHash = orphanTx.GetHash();
NodeId fromPeer = (*mi)->second.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;
if (setMisbehaving.count(fromPeer))
continue;
if (AcceptToMemoryPool(mempool, stateDummy, orphanTx, true, &fMissingInputs2)) {
LogPrint("mempool", " accepted orphan tx %s\n", orphanHash.ToString());
RelayTransaction(orphanTx, connman);
for (unsigned int i = 0; i < orphanTx.vout.size(); i++) {
vWorkQueue.emplace_back(orphanHash, i);
}
vEraseQueue.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());
}
// Has inputs but not accepted to mempool
// Probably non-standard or insufficient fee/priority
LogPrint("mempool", " removed orphan tx %s\n", orphanHash.ToString());
vEraseQueue.push_back(orphanHash);
if (orphanTx.wit.IsNull() && !stateDummy.CorruptionPossible()) {
// Do not use rejection cache for witness transactions or
// witness-stripped transactions, as they can have been malleated.
// See https://github.com/bitcoin/bitcoin/issues/8279 for details.
assert(recentRejects);
recentRejects->insert(orphanHash);
}
}
mempool.check(pcoinsTip);
}
}
BOOST_FOREACH(uint256 hash, vEraseQueue)
EraseOrphanTx(hash);
}
else if (fMissingInputs)
{
bool fRejectedParents = false; // It may be the case that the orphans parents have all been rejected
BOOST_FOREACH(const CTxIn& txin, tx.vin) {
if (recentRejects->contains(txin.prevout.hash)) {
fRejectedParents = true;
break;
}
}
if (!fRejectedParents) {
BOOST_FOREACH(const CTxIn& txin, tx.vin) {
CInv _inv(MSG_TX, txin.prevout.hash);
pfrom->AddInventoryKnown(_inv);
if (!AlreadyHave(_inv)) pfrom->AskFor(_inv);
}
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 {
LogPrint("mempool", "not keeping orphan with rejected parents %s\n",tx.GetHash().ToString());
}
} else {
if (tx.wit.IsNull() && !state.CorruptionPossible()) {
// Do not use rejection cache for witness transactions or
// witness-stripped transactions, as they can have been malleated.
// See https://github.com/bitcoin/bitcoin/issues/8279 for details.
assert(recentRejects);
recentRejects->insert(tx.GetHash());
}
if (pfrom->fWhitelisted && GetBoolArg("-whitelistforcerelay", DEFAULT_WHITELISTFORCERELAY)) {
// Always relay transactions received from whitelisted peers, even
// if they were already in the mempool or rejected from it due
// to policy, allowing the node to function as a gateway for
// nodes hidden behind it.
//
// Never relay transactions that we would assign a non-zero DoS
// score for, as we expect peers to do the same with us in that
// case.
int nDoS = 0;
if (!state.IsInvalid(nDoS) || nDoS == 0) {
LogPrintf("Force relaying tx %s from whitelisted peer=%d\n", tx.GetHash().ToString(), pfrom->id);
RelayTransaction(tx, connman);
} else {
LogPrintf("Not relaying invalid transaction %s from whitelisted peer=%d (%s)\n", tx.GetHash().ToString(), pfrom->id, FormatStateMessage(state));
}
}
}
int nDoS = 0;
if (state.IsInvalid(nDoS))
{
LogPrint("mempoolrej", "%s from peer=%d was not accepted: %s\n", tx.GetHash().ToString(),
pfrom->id,
FormatStateMessage(state));
if (state.GetRejectCode() < REJECT_INTERNAL) // Never send AcceptToMemoryPool's internal codes over P2P
pfrom->PushMessage(NetMsgType::REJECT, strCommand, (unsigned char)state.GetRejectCode(),
state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
if (nDoS > 0) {
Misbehaving(pfrom->GetId(), nDoS);
}
}
FlushStateToDisk(state, FLUSH_STATE_PERIODIC);
}
else if (strCommand == NetMsgType::CMPCTBLOCK && !fImporting && !fReindex) // Ignore blocks received while importing
{
CBlockHeaderAndShortTxIDs cmpctblock;
vRecv >> cmpctblock;
LOCK(cs_main);
if (mapBlockIndex.find(cmpctblock.header.hashPrevBlock) == mapBlockIndex.end()) {
// Doesn't connect (or is genesis), instead of DoSing in AcceptBlockHeader, request deeper headers
if (!IsInitialBlockDownload())
pfrom->PushMessage(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexBestHeader), uint256());
return true;
}
CBlockIndex *pindex = NULL;
CValidationState state;
if (!AcceptBlockHeader(cmpctblock.header, state, chainparams, &pindex)) {
int nDoS;
if (state.IsInvalid(nDoS)) {
if (nDoS > 0)
Misbehaving(pfrom->GetId(), nDoS);
LogPrintf("Peer %d sent us invalid header via cmpctblock\n", pfrom->id);
return true;
}
}
// If AcceptBlockHeader returned true, it set pindex
assert(pindex);
UpdateBlockAvailability(pfrom->GetId(), pindex->GetBlockHash());
std::map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator blockInFlightIt = mapBlocksInFlight.find(pindex->GetBlockHash());
bool fAlreadyInFlight = blockInFlightIt != mapBlocksInFlight.end();
if (pindex->nStatus & BLOCK_HAVE_DATA) // Nothing to do here
return true;
if (pindex->nChainWork <= chainActive.Tip()->nChainWork || // We know something better
pindex->nTx != 0) { // We had this block at some point, but pruned it
if (fAlreadyInFlight) {
// We requested this block for some reason, but our mempool will probably be useless
// so we just grab the block via normal getdata
std::vector<CInv> vInv(1);
vInv[0] = CInv(MSG_BLOCK | GetFetchFlags(pfrom, pindex->pprev, chainparams.GetConsensus()), cmpctblock.header.GetHash());
pfrom->PushMessage(NetMsgType::GETDATA, vInv);
}
return true;
}
// If we're not close to tip yet, give up and let parallel block fetch work its magic
if (!fAlreadyInFlight && !CanDirectFetch(chainparams.GetConsensus()))
return true;
CNodeState *nodestate = State(pfrom->GetId());
if (IsWitnessEnabled(pindex->pprev, chainparams.GetConsensus()) && !nodestate->fSupportsDesiredCmpctVersion) {
// Don't bother trying to process compact blocks from v1 peers
// after segwit activates.
return true;
}
// We want to be a bit conservative just to be extra careful about DoS
// possibilities in compact block processing...
if (pindex->nHeight <= chainActive.Height() + 2) {
if ((!fAlreadyInFlight && nodestate->nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) ||
(fAlreadyInFlight && blockInFlightIt->second.first == pfrom->GetId())) {
list<QueuedBlock>::iterator *queuedBlockIt = NULL;
if (!MarkBlockAsInFlight(pfrom->GetId(), pindex->GetBlockHash(), chainparams.GetConsensus(), pindex, &queuedBlockIt)) {
if (!(*queuedBlockIt)->partialBlock)
(*queuedBlockIt)->partialBlock.reset(new PartiallyDownloadedBlock(&mempool));
else {
// The block was already in flight using compact blocks from the same peer
LogPrint("net", "Peer sent us compact block we were already syncing!\n");
return true;
}
}
PartiallyDownloadedBlock& partialBlock = *(*queuedBlockIt)->partialBlock;
ReadStatus status = partialBlock.InitData(cmpctblock);
if (status == READ_STATUS_INVALID) {
MarkBlockAsReceived(pindex->GetBlockHash()); // Reset in-flight state in case of whitelist
Misbehaving(pfrom->GetId(), 100);
LogPrintf("Peer %d sent us invalid compact block\n", pfrom->id);
return true;
} else if (status == READ_STATUS_FAILED) {
// Duplicate txindexes, the block is now in-flight, so just request it
std::vector<CInv> vInv(1);
vInv[0] = CInv(MSG_BLOCK | GetFetchFlags(pfrom, pindex->pprev, chainparams.GetConsensus()), cmpctblock.header.GetHash());
pfrom->PushMessage(NetMsgType::GETDATA, vInv);
return true;
}
if (!fAlreadyInFlight && mapBlocksInFlight.size() == 1 && pindex->pprev->IsValid(BLOCK_VALID_CHAIN)) {
// We seem to be rather well-synced, so it appears pfrom was the first to provide us
// with this block! Let's get them to announce using compact blocks in the future.
MaybeSetPeerAsAnnouncingHeaderAndIDs(nodestate, pfrom, connman);
}
BlockTransactionsRequest req;
for (size_t i = 0; i < cmpctblock.BlockTxCount(); i++) {
if (!partialBlock.IsTxAvailable(i))
req.indexes.push_back(i);
}
if (req.indexes.empty()) {
// Dirty hack to jump to BLOCKTXN code (TODO: move message handling into their own functions)
BlockTransactions txn;
txn.blockhash = cmpctblock.header.GetHash();
CDataStream blockTxnMsg(SER_NETWORK, PROTOCOL_VERSION);
blockTxnMsg << txn;
return ProcessMessage(pfrom, NetMsgType::BLOCKTXN, blockTxnMsg, nTimeReceived, chainparams, connman);
} else {
req.blockhash = pindex->GetBlockHash();
pfrom->PushMessage(NetMsgType::GETBLOCKTXN, req);
}
}
} else {
if (fAlreadyInFlight) {
// We requested this block, but its far into the future, so our
// mempool will probably be useless - request the block normally
std::vector<CInv> vInv(1);
vInv[0] = CInv(MSG_BLOCK | GetFetchFlags(pfrom, pindex->pprev, chainparams.GetConsensus()), cmpctblock.header.GetHash());
pfrom->PushMessage(NetMsgType::GETDATA, vInv);
return true;
} else {
// If this was an announce-cmpctblock, we want the same treatment as a header message
// Dirty hack to process as if it were just a headers message (TODO: move message handling into their own functions)
std::vector<CBlock> headers;
headers.push_back(cmpctblock.header);
CDataStream vHeadersMsg(SER_NETWORK, PROTOCOL_VERSION);
vHeadersMsg << headers;
return ProcessMessage(pfrom, NetMsgType::HEADERS, vHeadersMsg, nTimeReceived, chainparams, connman);
}
}
CheckBlockIndex(chainparams.GetConsensus());
}
else if (strCommand == NetMsgType::BLOCKTXN && !fImporting && !fReindex) // Ignore blocks received while importing
{
BlockTransactions resp;
vRecv >> resp;
CBlock block;
bool fBlockRead = false;
{
LOCK(cs_main);
map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator it = mapBlocksInFlight.find(resp.blockhash);
if (it == mapBlocksInFlight.end() || !it->second.second->partialBlock ||
it->second.first != pfrom->GetId()) {
LogPrint("net", "Peer %d sent us block transactions for block we weren't expecting\n", pfrom->id);
return true;
}
PartiallyDownloadedBlock& partialBlock = *it->second.second->partialBlock;
ReadStatus status = partialBlock.FillBlock(block, resp.txn);
if (status == READ_STATUS_INVALID) {
MarkBlockAsReceived(resp.blockhash); // Reset in-flight state in case of whitelist
Misbehaving(pfrom->GetId(), 100);
LogPrintf("Peer %d sent us invalid compact block/non-matching block transactions\n", pfrom->id);
return true;
} else if (status == READ_STATUS_FAILED) {
// Might have collided, fall back to getdata now :(
std::vector<CInv> invs;
invs.push_back(CInv(MSG_BLOCK | GetFetchFlags(pfrom, chainActive.Tip(), chainparams.GetConsensus()), resp.blockhash));
pfrom->PushMessage(NetMsgType::GETDATA, invs);
} else
fBlockRead = true;
} // Don't hold cs_main when we call into ProcessNewBlock
if (fBlockRead) {
CValidationState state;
ProcessNewBlock(state, chainparams, pfrom, &block, false, NULL);
int nDoS;
if (state.IsInvalid(nDoS)) {
assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes
pfrom->PushMessage(NetMsgType::REJECT, strCommand, (unsigned char)state.GetRejectCode(),
state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), block.GetHash());
if (nDoS > 0) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), nDoS);
}
}
}
}
else if (strCommand == NetMsgType::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) {
LOCK(cs_main);
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;
}
CNodeState *nodestate = State(pfrom->GetId());
// If this looks like it could be a block announcement (nCount <
// MAX_BLOCKS_TO_ANNOUNCE), use special logic for handling headers that
// don't connect:
// - Send a getheaders message in response to try to connect the chain.
// - The peer can send up to MAX_UNCONNECTING_HEADERS in a row that
// don't connect before giving DoS points
// - Once a headers message is received that is valid and does connect,
// nUnconnectingHeaders gets reset back to 0.
if (mapBlockIndex.find(headers[0].hashPrevBlock) == mapBlockIndex.end() && nCount < MAX_BLOCKS_TO_ANNOUNCE) {
nodestate->nUnconnectingHeaders++;
pfrom->PushMessage(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexBestHeader), uint256());
LogPrint("net", "received header %s: missing prev block %s, sending getheaders (%d) to end (peer=%d, nUnconnectingHeaders=%d)\n",
headers[0].GetHash().ToString(),
headers[0].hashPrevBlock.ToString(),
pindexBestHeader->nHeight,
pfrom->id, nodestate->nUnconnectingHeaders);
// Set hashLastUnknownBlock for this peer, so that if we
// eventually get the headers - even from a different peer -
// we can use this peer to download.
UpdateBlockAvailability(pfrom->GetId(), headers.back().GetHash());
if (nodestate->nUnconnectingHeaders % MAX_UNCONNECTING_HEADERS == 0) {
Misbehaving(pfrom->GetId(), 20);
}
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, chainparams, &pindexLast)) {
int nDoS;
if (state.IsInvalid(nDoS)) {
if (nDoS > 0)
Misbehaving(pfrom->GetId(), nDoS);
return error("invalid header received");
}
}
}
if (nodestate->nUnconnectingHeaders > 0) {
LogPrint("net", "peer=%d: resetting nUnconnectingHeaders (%d -> 0)\n", pfrom->id, nodestate->nUnconnectingHeaders);
}
nodestate->nUnconnectingHeaders = 0;
assert(pindexLast);
UpdateBlockAvailability(pfrom->GetId(), pindexLast->GetBlockHash());
if (nCount == MAX_HEADERS_RESULTS) {
// 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(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexLast), uint256());
}
bool fCanDirectFetch = CanDirectFetch(chainparams.GetConsensus());
// If this set of headers is valid and ends in a block with at least as
// much work as our tip, download as much as possible.
if (fCanDirectFetch && pindexLast->IsValid(BLOCK_VALID_TREE) && chainActive.Tip()->nChainWork <= pindexLast->nChainWork) {
vector<CBlockIndex *> vToFetch;
CBlockIndex *pindexWalk = pindexLast;
// Calculate all the blocks we'd need to switch to pindexLast, up to a limit.
while (pindexWalk && !chainActive.Contains(pindexWalk) && vToFetch.size() <= MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
if (!(pindexWalk->nStatus & BLOCK_HAVE_DATA) &&
!mapBlocksInFlight.count(pindexWalk->GetBlockHash()) &&
(!IsWitnessEnabled(pindexWalk->pprev, chainparams.GetConsensus()) || State(pfrom->GetId())->fHaveWitness)) {
// We don't have this block, and it's not yet in flight.
vToFetch.push_back(pindexWalk);
}
pindexWalk = pindexWalk->pprev;
}
// If pindexWalk still isn't on our main chain, we're looking at a
// very large reorg at a time we think we're close to caught up to
// the main chain -- this shouldn't really happen. Bail out on the
// direct fetch and rely on parallel download instead.
if (!chainActive.Contains(pindexWalk)) {
LogPrint("net", "Large reorg, won't direct fetch to %s (%d)\n",
pindexLast->GetBlockHash().ToString(),
pindexLast->nHeight);
} else {
vector<CInv> vGetData;
// Download as much as possible, from earliest to latest.
BOOST_REVERSE_FOREACH(CBlockIndex *pindex, vToFetch) {
if (nodestate->nBlocksInFlight >= MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
// Can't download any more from this peer
break;
}
uint32_t nFetchFlags = GetFetchFlags(pfrom, pindex->pprev, chainparams.GetConsensus());
vGetData.push_back(CInv(MSG_BLOCK | nFetchFlags, pindex->GetBlockHash()));
MarkBlockAsInFlight(pfrom->GetId(), pindex->GetBlockHash(), chainparams.GetConsensus(), pindex);
LogPrint("net", "Requesting block %s from peer=%d\n",
pindex->GetBlockHash().ToString(), pfrom->id);
}
if (vGetData.size() > 1) {
LogPrint("net", "Downloading blocks toward %s (%d) via headers direct fetch\n",
pindexLast->GetBlockHash().ToString(), pindexLast->nHeight);
}
if (vGetData.size() > 0) {
if (nodestate->fSupportsDesiredCmpctVersion && vGetData.size() == 1 && mapBlocksInFlight.size() == 1 && pindexLast->pprev->IsValid(BLOCK_VALID_CHAIN)) {
// We seem to be rather well-synced, so it appears pfrom was the first to provide us
// with this block! Let's get them to announce using compact blocks in the future.
MaybeSetPeerAsAnnouncingHeaderAndIDs(nodestate, pfrom, connman);
// In any case, we want to download using a compact block, not a regular one
vGetData[0] = CInv(MSG_CMPCT_BLOCK, vGetData[0].hash);
}
pfrom->PushMessage(NetMsgType::GETDATA, vGetData);
}
}
}
CheckBlockIndex(chainparams.GetConsensus());
}
NotifyHeaderTip();
}
else if (strCommand == NetMsgType::BLOCK && !fImporting && !fReindex) // Ignore blocks received while importing
{
CBlock block;
vRecv >> block;
LogPrint("net", "received block %s peer=%d\n", block.GetHash().ToString(), pfrom->id);
CValidationState state;
// Process all blocks from whitelisted peers, even if not requested,
// unless we're still syncing with the network.
// Such an unrequested block may still be processed, subject to the
// conditions in AcceptBlock().
bool forceProcessing = pfrom->fWhitelisted && !IsInitialBlockDownload();
ProcessNewBlock(state, chainparams, pfrom, &block, forceProcessing, NULL);
int nDoS;
if (state.IsInvalid(nDoS)) {
assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes
pfrom->PushMessage(NetMsgType::REJECT, strCommand, (unsigned char)state.GetRejectCode(),
state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), block.GetHash());
if (nDoS > 0) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), nDoS);
}
}
}
else if (strCommand == NetMsgType::GETADDR)
{
// 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 nodes which are behind NAT and can only make outgoing connections ignore
// the getaddr message mitigates the attack.
if (!pfrom->fInbound) {
LogPrint("net", "Ignoring \"getaddr\" from outbound connection. peer=%d\n", pfrom->id);
return true;
}
// Only send one GetAddr response per connection to reduce resource waste
// and discourage addr stamping of INV announcements.
if (pfrom->fSentAddr) {
LogPrint("net", "Ignoring repeated \"getaddr\". peer=%d\n", pfrom->id);
return true;
}
pfrom->fSentAddr = true;
pfrom->vAddrToSend.clear();
vector<CAddress> vAddr = connman.GetAddresses();
FastRandomContext insecure_rand;
BOOST_FOREACH(const CAddress &addr, vAddr)
pfrom->PushAddress(addr, insecure_rand);
}
else if (strCommand == NetMsgType::MEMPOOL)
{
if (!(pfrom->GetLocalServices() & NODE_BLOOM) && !pfrom->fWhitelisted)
{
LogPrint("net", "mempool request with bloom filters disabled, disconnect peer=%d\n", pfrom->GetId());
pfrom->fDisconnect = true;
return true;
}
if (connman.OutboundTargetReached(false) && !pfrom->fWhitelisted)
{
LogPrint("net", "mempool request with bandwidth limit reached, disconnect peer=%d\n", pfrom->GetId());
pfrom->fDisconnect = true;
return true;
}
LOCK(pfrom->cs_inventory);
pfrom->fSendMempool = true;
}
else if (strCommand == NetMsgType::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(NetMsgType::PONG, nonce);
}
}
else if (strCommand == NetMsgType::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;
pfrom->nMinPingUsecTime = std::min(pfrom->nMinPingUsecTime, 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, %x expected, %x received, %u bytes\n",
pfrom->id,
sProblem,
pfrom->nPingNonceSent,
nonce,
nAvail);
}
if (bPingFinished) {
pfrom->nPingNonceSent = 0;
}
}
else if (strCommand == NetMsgType::FILTERLOAD)
{
CBloomFilter filter;
vRecv >> filter;
if (!filter.IsWithinSizeConstraints())
{
// There is no excuse for sending a too-large filter
LOCK(cs_main);
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 == NetMsgType::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
bool bad = false;
if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE) {
bad = true;
} else {
LOCK(pfrom->cs_filter);
if (pfrom->pfilter) {
pfrom->pfilter->insert(vData);
} else {
bad = true;
}
}
if (bad) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 100);
}
}
else if (strCommand == NetMsgType::FILTERCLEAR)
{
LOCK(pfrom->cs_filter);
delete pfrom->pfilter;
pfrom->pfilter = new CBloomFilter();
pfrom->fRelayTxes = true;
}
else if (strCommand == NetMsgType::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 == NetMsgType::BLOCK || strMsg == NetMsgType::TX)
{
uint256 hash;
vRecv >> hash;
ss << ": hash " << hash.ToString();
}
LogPrint("net", "Reject %s\n", SanitizeString(ss.str()));
} catch (const std::ios_base::failure&) {
// Avoid feedback loops by preventing reject messages from triggering a new reject message.
LogPrint("net", "Unparseable reject message received\n");
}
}
}
else if (strCommand == NetMsgType::FEEFILTER) {
CAmount newFeeFilter = 0;
vRecv >> newFeeFilter;
if (MoneyRange(newFeeFilter)) {
{
LOCK(pfrom->cs_feeFilter);
pfrom->minFeeFilter = newFeeFilter;
}
LogPrint("net", "received: feefilter of %s from peer=%d\n", CFeeRate(newFeeFilter).ToString(), pfrom->id);
}
}
else if (strCommand == NetMsgType::NOTFOUND) {
// We do not care about the NOTFOUND message, but logging an Unknown Command
// message would be undesirable as we transmit it ourselves.
}
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, CConnman& connman)
{
const CChainParams& chainparams = Params();
unsigned int nMaxSendBufferSize = connman.GetSendBufferSize();
//if (fDebug)
// LogPrintf("%s(%u messages)\n", __func__, 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, chainparams.GetConsensus(), connman);
// 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 >= nMaxSendBufferSize)
break;
// get next message
CNetMessage& msg = *it;
//if (fDebug)
// LogPrintf("%s(message %u msgsz, %u bytes, complete:%s)\n", __func__,
// 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, chainparams.MessageStart(), CMessageHeader::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(chainparams.MessageStart()))
{
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);
if (memcmp(hash.begin(), hdr.pchChecksum, CMessageHeader::CHECKSUM_SIZE) != 0)
{
LogPrintf("%s(%s, %u bytes): CHECKSUM ERROR expected %s was %s\n", __func__,
SanitizeString(strCommand), nMessageSize,
HexStr(hash.begin(), hash.begin()+CMessageHeader::CHECKSUM_SIZE),
HexStr(hdr.pchChecksum, hdr.pchChecksum+CMessageHeader::CHECKSUM_SIZE));
continue;
}
// Process message
bool fRet = false;
try
{
fRet = ProcessMessage(pfrom, strCommand, vRecv, msg.nTime, chainparams, connman);
boost::this_thread::interruption_point();
}
catch (const std::ios_base::failure& e)
{
pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_MALFORMED, string("error parsing message"));
if (strstr(e.what(), "end of data"))
{
// Allow exceptions from under-length message on vRecv
LogPrintf("%s(%s, %u bytes): Exception '%s' caught, normally caused by a message being shorter than its stated length\n", __func__, SanitizeString(strCommand), nMessageSize, e.what());
}
else if (strstr(e.what(), "size too large"))
{
// Allow exceptions from over-long size
LogPrintf("%s(%s, %u bytes): Exception '%s' caught\n", __func__, SanitizeString(strCommand), nMessageSize, e.what());
}
else if (strstr(e.what(), "non-canonical ReadCompactSize()"))
{
// Allow exceptions from non-canonical encoding
LogPrintf("%s(%s, %u bytes): Exception '%s' caught\n", __func__, SanitizeString(strCommand), nMessageSize, e.what());
}
else
{
PrintExceptionContinue(&e, "ProcessMessages()");
}
}
catch (const boost::thread_interrupted&) {
throw;
}
catch (const std::exception& e) {
PrintExceptionContinue(&e, "ProcessMessages()");
} catch (...) {
PrintExceptionContinue(NULL, "ProcessMessages()");
}
if (!fRet)
LogPrintf("%s(%s, %u bytes) FAILED peer=%d\n", __func__, 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;
}
class CompareInvMempoolOrder
{
CTxMemPool *mp;
public:
CompareInvMempoolOrder(CTxMemPool *_mempool)
{
mp = _mempool;
}
bool operator()(std::set<uint256>::iterator a, std::set<uint256>::iterator b)
{
/* As std::make_heap produces a max-heap, we want the entries with the
* fewest ancestors/highest fee to sort later. */
return mp->CompareDepthAndScore(*b, *a);
}
};
bool SendMessages(CNode* pto, CConnman& connman)
{
const Consensus::Params& consensusParams = Params().GetConsensus();
{
// Don't send anything until we get its 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 && !pto->fDisconnect) {
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(NetMsgType::PING, nonce);
} else {
// Peer is too old to support ping command with nonce, pong will never arrive.
pto->nPingNonceSent = 0;
pto->PushMessage(NetMsgType::PING);
}
}
TRY_LOCK(cs_main, lockMain); // Acquire cs_main for IsInitialBlockDownload() and CNodeState()
if (!lockMain)
return true;
// Address refresh broadcast
int64_t nNow = GetTimeMicros();
if (!IsInitialBlockDownload() && pto->nNextLocalAddrSend < nNow) {
AdvertiseLocal(pto);
pto->nNextLocalAddrSend = PoissonNextSend(nNow, AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL);
}
//
// Message: addr
//
if (pto->nNextAddrSend < nNow) {
pto->nNextAddrSend = PoissonNextSend(nNow, AVG_ADDRESS_BROADCAST_INTERVAL);
vector<CAddress> vAddr;
vAddr.reserve(pto->vAddrToSend.size());
BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
{
if (!pto->addrKnown.contains(addr.GetKey()))
{
pto->addrKnown.insert(addr.GetKey());
vAddr.push_back(addr);
// receiver rejects addr messages larger than 1000
if (vAddr.size() >= 1000)
{
pto->PushMessage(NetMsgType::ADDR, vAddr);
vAddr.clear();
}
}
}
pto->vAddrToSend.clear();
if (!vAddr.empty())
pto->PushMessage(NetMsgType::ADDR, vAddr);
// we only send the big addr message once
if (pto->vAddrToSend.capacity() > 40)
pto->vAddrToSend.shrink_to_fit();
}
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
{
connman.Ban(pto->addr, BanReasonNodeMisbehaving);
}
}
state.fShouldBan = false;
}
BOOST_FOREACH(const CBlockReject& reject, state.rejects)
pto->PushMessage(NetMsgType::REJECT, (string)NetMsgType::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 && !pto->fDisconnect && !fImporting && !fReindex) {
// Only actively request headers from a single peer, unless we're close to today.
if ((nSyncStarted == 0 && fFetch) || pindexBestHeader->GetBlockTime() > GetAdjustedTime() - 24 * 60 * 60) {
state.fSyncStarted = true;
nSyncStarted++;
const CBlockIndex *pindexStart = pindexBestHeader;
/* If possible, start at the block preceding the currently
best known header. This ensures that we always get a
non-empty list of headers back as long as the peer
is up-to-date. With a non-empty response, we can initialise
the peer's known best block. This wouldn't be possible
if we requested starting at pindexBestHeader and
got back an empty response. */
if (pindexStart->pprev)
pindexStart = pindexStart->pprev;
LogPrint("net", "initial getheaders (%d) to peer=%d (startheight:%d)\n", pindexStart->nHeight, pto->id, pto->nStartingHeight);
pto->PushMessage(NetMsgType::GETHEADERS, chainActive.GetLocator(pindexStart), uint256());
}
}
// 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())
{
GetMainSignals().Broadcast(nTimeBestReceived, &connman);
}
//
// Try sending block announcements via headers
//
{
// If we have less than MAX_BLOCKS_TO_ANNOUNCE in our
// list of block hashes we're relaying, and our peer wants
// headers announcements, then find the first header
// not yet known to our peer but would connect, and send.
// If no header would connect, or if we have too many
// blocks, or if the peer doesn't want headers, just
// add all to the inv queue.
LOCK(pto->cs_inventory);
vector<CBlock> vHeaders;
bool fRevertToInv = ((!state.fPreferHeaders &&
(!state.fPreferHeaderAndIDs || pto->vBlockHashesToAnnounce.size() > 1)) ||
pto->vBlockHashesToAnnounce.size() > MAX_BLOCKS_TO_ANNOUNCE);
CBlockIndex *pBestIndex = NULL; // last header queued for delivery
ProcessBlockAvailability(pto->id); // ensure pindexBestKnownBlock is up-to-date
if (!fRevertToInv) {
bool fFoundStartingHeader = false;
// Try to find first header that our peer doesn't have, and
// then send all headers past that one. If we come across any
// headers that aren't on chainActive, give up.
BOOST_FOREACH(const uint256 &hash, pto->vBlockHashesToAnnounce) {
BlockMap::iterator mi = mapBlockIndex.find(hash);
assert(mi != mapBlockIndex.end());
CBlockIndex *pindex = mi->second;
if (chainActive[pindex->nHeight] != pindex) {
// Bail out if we reorged away from this block
fRevertToInv = true;
break;
}
if (pBestIndex != NULL && pindex->pprev != pBestIndex) {
// This means that the list of blocks to announce don't
// connect to each other.
// This shouldn't really be possible to hit during
// regular operation (because reorgs should take us to
// a chain that has some block not on the prior chain,
// which should be caught by the prior check), but one
// way this could happen is by using invalidateblock /
// reconsiderblock repeatedly on the tip, causing it to
// be added multiple times to vBlockHashesToAnnounce.
// Robustly deal with this rare situation by reverting
// to an inv.
fRevertToInv = true;
break;
}
pBestIndex = pindex;
if (fFoundStartingHeader) {
// add this to the headers message
vHeaders.push_back(pindex->GetBlockHeader());
} else if (PeerHasHeader(&state, pindex)) {
continue; // keep looking for the first new block
} else if (pindex->pprev == NULL || PeerHasHeader(&state, pindex->pprev)) {
// Peer doesn't have this header but they do have the prior one.
// Start sending headers.
fFoundStartingHeader = true;
vHeaders.push_back(pindex->GetBlockHeader());
} else {
// Peer doesn't have this header or the prior one -- nothing will
// connect, so bail out.
fRevertToInv = true;
break;
}
}
}
if (!fRevertToInv && !vHeaders.empty()) {
if (vHeaders.size() == 1 && state.fPreferHeaderAndIDs) {
// We only send up to 1 block as header-and-ids, as otherwise
// probably means we're doing an initial-ish-sync or they're slow
LogPrint("net", "%s sending header-and-ids %s to peer %d\n", __func__,
vHeaders.front().GetHash().ToString(), pto->id);
//TODO: Shouldn't need to reload block from disk, but requires refactor
CBlock block;
assert(ReadBlockFromDisk(block, pBestIndex, consensusParams));
CBlockHeaderAndShortTxIDs cmpctblock(block, state.fWantsCmpctWitness);
pto->PushMessageWithFlag(state.fWantsCmpctWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::CMPCTBLOCK, cmpctblock);
state.pindexBestHeaderSent = pBestIndex;
} else if (state.fPreferHeaders) {
if (vHeaders.size() > 1) {
LogPrint("net", "%s: %u headers, range (%s, %s), to peer=%d\n", __func__,
vHeaders.size(),
vHeaders.front().GetHash().ToString(),
vHeaders.back().GetHash().ToString(), pto->id);
} else {
LogPrint("net", "%s: sending header %s to peer=%d\n", __func__,
vHeaders.front().GetHash().ToString(), pto->id);
}
pto->PushMessage(NetMsgType::HEADERS, vHeaders);
state.pindexBestHeaderSent = pBestIndex;
} else
fRevertToInv = true;
}
if (fRevertToInv) {
// If falling back to using an inv, just try to inv the tip.
// The last entry in vBlockHashesToAnnounce was our tip at some point
// in the past.
if (!pto->vBlockHashesToAnnounce.empty()) {
const uint256 &hashToAnnounce = pto->vBlockHashesToAnnounce.back();
BlockMap::iterator mi = mapBlockIndex.find(hashToAnnounce);
assert(mi != mapBlockIndex.end());
CBlockIndex *pindex = mi->second;
// Warn if we're announcing a block that is not on the main chain.
// This should be very rare and could be optimized out.
// Just log for now.
if (chainActive[pindex->nHeight] != pindex) {
LogPrint("net", "Announcing block %s not on main chain (tip=%s)\n",
hashToAnnounce.ToString(), chainActive.Tip()->GetBlockHash().ToString());
}
// If the peer's chain has this block, don't inv it back.
if (!PeerHasHeader(&state, pindex)) {
pto->PushInventory(CInv(MSG_BLOCK, hashToAnnounce));
LogPrint("net", "%s: sending inv peer=%d hash=%s\n", __func__,
pto->id, hashToAnnounce.ToString());
}
}
}
pto->vBlockHashesToAnnounce.clear();
}
//
// Message: inventory
//
vector<CInv> vInv;
{
LOCK(pto->cs_inventory);
vInv.reserve(std::max<size_t>(pto->vInventoryBlockToSend.size(), INVENTORY_BROADCAST_MAX));
// Add blocks
BOOST_FOREACH(const uint256& hash, pto->vInventoryBlockToSend) {
vInv.push_back(CInv(MSG_BLOCK, hash));
if (vInv.size() == MAX_INV_SZ) {
pto->PushMessage(NetMsgType::INV, vInv);
vInv.clear();
}
}
pto->vInventoryBlockToSend.clear();
// Check whether periodic sends should happen
bool fSendTrickle = pto->fWhitelisted;
if (pto->nNextInvSend < nNow) {
fSendTrickle = true;
// Use half the delay for outbound peers, as there is less privacy concern for them.
pto->nNextInvSend = PoissonNextSend(nNow, INVENTORY_BROADCAST_INTERVAL >> !pto->fInbound);
}
// Time to send but the peer has requested we not relay transactions.
if (fSendTrickle) {
LOCK(pto->cs_filter);
if (!pto->fRelayTxes) pto->setInventoryTxToSend.clear();
}
// Respond to BIP35 mempool requests
if (fSendTrickle && pto->fSendMempool) {
auto vtxinfo = mempool.infoAll();
pto->fSendMempool = false;
CAmount filterrate = 0;
{
LOCK(pto->cs_feeFilter);
filterrate = pto->minFeeFilter;
}
LOCK(pto->cs_filter);
for (const auto& txinfo : vtxinfo) {
const uint256& hash = txinfo.tx->GetHash();
CInv inv(MSG_TX, hash);
pto->setInventoryTxToSend.erase(hash);
if (filterrate) {
if (txinfo.feeRate.GetFeePerK() < filterrate)
continue;
}
if (pto->pfilter) {
if (!pto->pfilter->IsRelevantAndUpdate(*txinfo.tx)) continue;
}
pto->filterInventoryKnown.insert(hash);
vInv.push_back(inv);
if (vInv.size() == MAX_INV_SZ) {
pto->PushMessage(NetMsgType::INV, vInv);
vInv.clear();
}
}
pto->timeLastMempoolReq = GetTime();
}
// Determine transactions to relay
if (fSendTrickle) {
// Produce a vector with all candidates for sending
vector<std::set<uint256>::iterator> vInvTx;
vInvTx.reserve(pto->setInventoryTxToSend.size());
for (std::set<uint256>::iterator it = pto->setInventoryTxToSend.begin(); it != pto->setInventoryTxToSend.end(); it++) {
vInvTx.push_back(it);
}
CAmount filterrate = 0;
{
LOCK(pto->cs_feeFilter);
filterrate = pto->minFeeFilter;
}
// Topologically and fee-rate sort the inventory we send for privacy and priority reasons.
// A heap is used so that not all items need sorting if only a few are being sent.
CompareInvMempoolOrder compareInvMempoolOrder(&mempool);
std::make_heap(vInvTx.begin(), vInvTx.end(), compareInvMempoolOrder);
// No reason to drain out at many times the network's capacity,
// especially since we have many peers and some will draw much shorter delays.
unsigned int nRelayedTransactions = 0;
LOCK(pto->cs_filter);
while (!vInvTx.empty() && nRelayedTransactions < INVENTORY_BROADCAST_MAX) {
// Fetch the top element from the heap
std::pop_heap(vInvTx.begin(), vInvTx.end(), compareInvMempoolOrder);
std::set<uint256>::iterator it = vInvTx.back();
vInvTx.pop_back();
uint256 hash = *it;
// Remove it from the to-be-sent set
pto->setInventoryTxToSend.erase(it);
// Check if not in the filter already
if (pto->filterInventoryKnown.contains(hash)) {
continue;
}
// Not in the mempool anymore? don't bother sending it.
auto txinfo = mempool.info(hash);
if (!txinfo.tx) {
continue;
}
if (filterrate && txinfo.feeRate.GetFeePerK() < filterrate) {
continue;
}
if (pto->pfilter && !pto->pfilter->IsRelevantAndUpdate(*txinfo.tx)) continue;
// Send
vInv.push_back(CInv(MSG_TX, hash));
nRelayedTransactions++;
{
// Expire old relay messages
while (!vRelayExpiration.empty() && vRelayExpiration.front().first < nNow)
{
mapRelay.erase(vRelayExpiration.front().second);
vRelayExpiration.pop_front();
}
auto ret = mapRelay.insert(std::make_pair(hash, std::move(txinfo.tx)));
if (ret.second) {
vRelayExpiration.push_back(std::make_pair(nNow + 15 * 60 * 1000000, ret.first));
}
}
if (vInv.size() == MAX_INV_SZ) {
pto->PushMessage(NetMsgType::INV, vInv);
vInv.clear();
}
pto->filterInventoryKnown.insert(hash);
}
}
}
if (!vInv.empty())
pto->PushMessage(NetMsgType::INV, vInv);
// Detect whether we're stalling
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 peers from which we're downloading validated blocks), disconnect due to timeout.
// We compensate for other peers to prevent killing off peers due to our own downstream link
// being saturated. We only count validated in-flight blocks so peers can't advertise non-existing block hashes
// to unreasonably increase our timeout.
if (!pto->fDisconnect && state.vBlocksInFlight.size() > 0) {
QueuedBlock &queuedBlock = state.vBlocksInFlight.front();
int nOtherPeersWithValidatedDownloads = nPeersWithValidatedDownloads - (state.nBlocksInFlightValidHeaders > 0);
if (nNow > state.nDownloadingSince + consensusParams.nPowTargetSpacing * (BLOCK_DOWNLOAD_TIMEOUT_BASE + BLOCK_DOWNLOAD_TIMEOUT_PER_PEER * nOtherPeersWithValidatedDownloads)) {
LogPrintf("Timeout downloading block %s from peer=%d, disconnecting\n", queuedBlock.hash.ToString(), pto->id);
pto->fDisconnect = true;
}
}
//
// Message: getdata (blocks)
//
vector<CInv> vGetData;
if (!pto->fDisconnect && !pto->fClient && (fFetch || !IsInitialBlockDownload()) && 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, consensusParams);
BOOST_FOREACH(CBlockIndex *pindex, vToDownload) {
uint32_t nFetchFlags = GetFetchFlags(pto, pindex->pprev, consensusParams);
vGetData.push_back(CInv(MSG_BLOCK | nFetchFlags, pindex->GetBlockHash()));
MarkBlockAsInFlight(pto->GetId(), pindex->GetBlockHash(), consensusParams, 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(NetMsgType::GETDATA, vGetData);
vGetData.clear();
}
} else {
//If we're not going to ask, don't expect a response.
pto->setAskFor.erase(inv.hash);
}
pto->mapAskFor.erase(pto->mapAskFor.begin());
}
if (!vGetData.empty())
pto->PushMessage(NetMsgType::GETDATA, vGetData);
//
// Message: feefilter
//
// We don't want white listed peers to filter txs to us if we have -whitelistforcerelay
if (pto->nVersion >= FEEFILTER_VERSION && GetBoolArg("-feefilter", DEFAULT_FEEFILTER) &&
!(pto->fWhitelisted && GetBoolArg("-whitelistforcerelay", DEFAULT_WHITELISTFORCERELAY))) {
CAmount currentFilter = mempool.GetMinFee(GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFeePerK();
int64_t timeNow = GetTimeMicros();
if (timeNow > pto->nextSendTimeFeeFilter) {
CAmount filterToSend = filterRounder.round(currentFilter);
if (filterToSend != pto->lastSentFeeFilter) {
pto->PushMessage(NetMsgType::FEEFILTER, filterToSend);
pto->lastSentFeeFilter = filterToSend;
}
pto->nextSendTimeFeeFilter = PoissonNextSend(timeNow, AVG_FEEFILTER_BROADCAST_INTERVAL);
}
// If the fee filter has changed substantially and it's still more than MAX_FEEFILTER_CHANGE_DELAY
// until scheduled broadcast, then move the broadcast to within MAX_FEEFILTER_CHANGE_DELAY.
else if (timeNow + MAX_FEEFILTER_CHANGE_DELAY * 1000000 < pto->nextSendTimeFeeFilter &&
(currentFilter < 3 * pto->lastSentFeeFilter / 4 || currentFilter > 4 * pto->lastSentFeeFilter / 3)) {
pto->nextSendTimeFeeFilter = timeNow + GetRandInt(MAX_FEEFILTER_CHANGE_DELAY) * 1000000;
}
}
}
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));
}
ThresholdState VersionBitsTipState(const Consensus::Params& params, Consensus::DeploymentPos pos)
{
LOCK(cs_main);
return VersionBitsState(chainActive.Tip(), params, pos, versionbitscache);
}
int VersionBitsTipStateSinceHeight(const Consensus::Params& params, Consensus::DeploymentPos pos)
{
LOCK(cs_main);
return VersionBitsStateSinceHeight(chainActive.Tip(), params, pos, versionbitscache);
}
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;
diff --git a/src/test/blockencodings_tests.cpp b/src/test/blockencodings_tests.cpp
index 7530b013b..f3f1befbc 100644
--- a/src/test/blockencodings_tests.cpp
+++ b/src/test/blockencodings_tests.cpp
@@ -1,314 +1,314 @@
// Copyright (c) 2011-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "blockencodings.h"
#include "consensus/merkle.h"
#include "chainparams.h"
#include "random.h"
#include "test/test_bitcoin.h"
#include <boost/test/unit_test.hpp>
struct RegtestingSetup : public TestingSetup {
RegtestingSetup() : TestingSetup(CBaseChainParams::REGTEST) {}
};
BOOST_FIXTURE_TEST_SUITE(blockencodings_tests, RegtestingSetup)
static CBlock BuildBlockTestCase() {
CBlock block;
CMutableTransaction tx;
tx.vin.resize(1);
tx.vin[0].scriptSig.resize(10);
tx.vout.resize(1);
tx.vout[0].nValue = 42;
block.vtx.resize(3);
block.vtx[0] = tx;
block.nVersion = 42;
block.hashPrevBlock = GetRandHash();
block.nBits = 0x207fffff;
tx.vin[0].prevout.hash = GetRandHash();
tx.vin[0].prevout.n = 0;
block.vtx[1] = tx;
tx.vin.resize(10);
for (size_t i = 0; i < tx.vin.size(); i++) {
tx.vin[i].prevout.hash = GetRandHash();
tx.vin[i].prevout.n = 0;
}
block.vtx[2] = tx;
bool mutated;
block.hashMerkleRoot = BlockMerkleRoot(block, &mutated);
assert(!mutated);
while (!CheckProofOfWork(block.GetHash(), block.nBits, Params().GetConsensus())) ++block.nNonce;
return block;
}
// Number of shared use_counts we expect for a tx we havent touched
// == 2 (mempool + our copy from the GetSharedTx call)
#define SHARED_TX_OFFSET 2
BOOST_AUTO_TEST_CASE(SimpleRoundTripTest)
{
CTxMemPool pool(CFeeRate(0));
TestMemPoolEntryHelper entry;
CBlock block(BuildBlockTestCase());
pool.addUnchecked(block.vtx[2].GetHash(), entry.FromTx(block.vtx[2]));
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
// Do a simple ShortTxIDs RT
{
CBlockHeaderAndShortTxIDs shortIDs(block, true);
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
stream << shortIDs;
CBlockHeaderAndShortTxIDs shortIDs2;
stream >> shortIDs2;
PartiallyDownloadedBlock partialBlock(&pool);
BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
BOOST_CHECK( partialBlock.IsTxAvailable(0));
BOOST_CHECK(!partialBlock.IsTxAvailable(1));
BOOST_CHECK( partialBlock.IsTxAvailable(2));
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
std::list<CTransaction> removed;
- pool.removeRecursive(block.vtx[2], removed);
+ pool.removeRecursive(block.vtx[2], &removed);
BOOST_CHECK_EQUAL(removed.size(), 1);
CBlock block2;
std::vector<CTransaction> vtx_missing;
BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_INVALID); // No transactions
vtx_missing.push_back(block.vtx[2]); // Wrong transaction
partialBlock.FillBlock(block2, vtx_missing); // Current implementation doesn't check txn here, but don't require that
bool mutated;
BOOST_CHECK(block.hashMerkleRoot != BlockMerkleRoot(block2, &mutated));
vtx_missing[0] = block.vtx[1];
CBlock block3;
BOOST_CHECK(partialBlock.FillBlock(block3, vtx_missing) == READ_STATUS_OK);
BOOST_CHECK_EQUAL(block.GetHash().ToString(), block3.GetHash().ToString());
BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block3, &mutated).ToString());
BOOST_CHECK(!mutated);
}
}
class TestHeaderAndShortIDs {
// Utility to encode custom CBlockHeaderAndShortTxIDs
public:
CBlockHeader header;
uint64_t nonce;
std::vector<uint64_t> shorttxids;
std::vector<PrefilledTransaction> prefilledtxn;
TestHeaderAndShortIDs(const CBlockHeaderAndShortTxIDs& orig) {
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
stream << orig;
stream >> *this;
}
TestHeaderAndShortIDs(const CBlock& block) :
TestHeaderAndShortIDs(CBlockHeaderAndShortTxIDs(block, true)) {}
uint64_t GetShortID(const uint256& txhash) const {
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
stream << *this;
CBlockHeaderAndShortTxIDs base;
stream >> base;
return base.GetShortID(txhash);
}
ADD_SERIALIZE_METHODS;
template <typename Stream, typename Operation>
inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) {
READWRITE(header);
READWRITE(nonce);
size_t shorttxids_size = shorttxids.size();
READWRITE(VARINT(shorttxids_size));
shorttxids.resize(shorttxids_size);
for (size_t i = 0; i < shorttxids.size(); i++) {
uint32_t lsb = shorttxids[i] & 0xffffffff;
uint16_t msb = (shorttxids[i] >> 32) & 0xffff;
READWRITE(lsb);
READWRITE(msb);
shorttxids[i] = (uint64_t(msb) << 32) | uint64_t(lsb);
}
READWRITE(prefilledtxn);
}
};
BOOST_AUTO_TEST_CASE(NonCoinbasePreforwardRTTest)
{
CTxMemPool pool(CFeeRate(0));
TestMemPoolEntryHelper entry;
CBlock block(BuildBlockTestCase());
pool.addUnchecked(block.vtx[2].GetHash(), entry.FromTx(block.vtx[2]));
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
// Test with pre-forwarding tx 1, but not coinbase
{
TestHeaderAndShortIDs shortIDs(block);
shortIDs.prefilledtxn.resize(1);
shortIDs.prefilledtxn[0] = {1, block.vtx[1]};
shortIDs.shorttxids.resize(2);
shortIDs.shorttxids[0] = shortIDs.GetShortID(block.vtx[0].GetHash());
shortIDs.shorttxids[1] = shortIDs.GetShortID(block.vtx[2].GetHash());
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
stream << shortIDs;
CBlockHeaderAndShortTxIDs shortIDs2;
stream >> shortIDs2;
PartiallyDownloadedBlock partialBlock(&pool);
BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
BOOST_CHECK(!partialBlock.IsTxAvailable(0));
BOOST_CHECK( partialBlock.IsTxAvailable(1));
BOOST_CHECK( partialBlock.IsTxAvailable(2));
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
CBlock block2;
std::vector<CTransaction> vtx_missing;
BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_INVALID); // No transactions
vtx_missing.push_back(block.vtx[1]); // Wrong transaction
partialBlock.FillBlock(block2, vtx_missing); // Current implementation doesn't check txn here, but don't require that
bool mutated;
BOOST_CHECK(block.hashMerkleRoot != BlockMerkleRoot(block2, &mutated));
vtx_missing[0] = block.vtx[0];
CBlock block3;
BOOST_CHECK(partialBlock.FillBlock(block3, vtx_missing) == READ_STATUS_OK);
BOOST_CHECK_EQUAL(block.GetHash().ToString(), block3.GetHash().ToString());
BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block3, &mutated).ToString());
BOOST_CHECK(!mutated);
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
}
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[2].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
}
BOOST_AUTO_TEST_CASE(SufficientPreforwardRTTest)
{
CTxMemPool pool(CFeeRate(0));
TestMemPoolEntryHelper entry;
CBlock block(BuildBlockTestCase());
pool.addUnchecked(block.vtx[1].GetHash(), entry.FromTx(block.vtx[1]));
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
// Test with pre-forwarding coinbase + tx 2 with tx 1 in mempool
{
TestHeaderAndShortIDs shortIDs(block);
shortIDs.prefilledtxn.resize(2);
shortIDs.prefilledtxn[0] = {0, block.vtx[0]};
shortIDs.prefilledtxn[1] = {1, block.vtx[2]}; // id == 1 as it is 1 after index 1
shortIDs.shorttxids.resize(1);
shortIDs.shorttxids[0] = shortIDs.GetShortID(block.vtx[1].GetHash());
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
stream << shortIDs;
CBlockHeaderAndShortTxIDs shortIDs2;
stream >> shortIDs2;
PartiallyDownloadedBlock partialBlock(&pool);
BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
BOOST_CHECK( partialBlock.IsTxAvailable(0));
BOOST_CHECK( partialBlock.IsTxAvailable(1));
BOOST_CHECK( partialBlock.IsTxAvailable(2));
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
CBlock block2;
std::vector<CTransaction> vtx_missing;
BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_OK);
BOOST_CHECK_EQUAL(block.GetHash().ToString(), block2.GetHash().ToString());
bool mutated;
BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block2, &mutated).ToString());
BOOST_CHECK(!mutated);
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 1);
}
BOOST_CHECK_EQUAL(pool.mapTx.find(block.vtx[1].GetHash())->GetSharedTx().use_count(), SHARED_TX_OFFSET + 0);
}
BOOST_AUTO_TEST_CASE(EmptyBlockRoundTripTest)
{
CTxMemPool pool(CFeeRate(0));
CMutableTransaction coinbase;
coinbase.vin.resize(1);
coinbase.vin[0].scriptSig.resize(10);
coinbase.vout.resize(1);
coinbase.vout[0].nValue = 42;
CBlock block;
block.vtx.resize(1);
block.vtx[0] = coinbase;
block.nVersion = 42;
block.hashPrevBlock = GetRandHash();
block.nBits = 0x207fffff;
bool mutated;
block.hashMerkleRoot = BlockMerkleRoot(block, &mutated);
assert(!mutated);
while (!CheckProofOfWork(block.GetHash(), block.nBits, Params().GetConsensus())) ++block.nNonce;
// Test simple header round-trip with only coinbase
{
CBlockHeaderAndShortTxIDs shortIDs(block, false);
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
stream << shortIDs;
CBlockHeaderAndShortTxIDs shortIDs2;
stream >> shortIDs2;
PartiallyDownloadedBlock partialBlock(&pool);
BOOST_CHECK(partialBlock.InitData(shortIDs2) == READ_STATUS_OK);
BOOST_CHECK(partialBlock.IsTxAvailable(0));
CBlock block2;
std::vector<CTransaction> vtx_missing;
BOOST_CHECK(partialBlock.FillBlock(block2, vtx_missing) == READ_STATUS_OK);
BOOST_CHECK_EQUAL(block.GetHash().ToString(), block2.GetHash().ToString());
BOOST_CHECK_EQUAL(block.hashMerkleRoot.ToString(), BlockMerkleRoot(block2, &mutated).ToString());
BOOST_CHECK(!mutated);
}
}
BOOST_AUTO_TEST_CASE(TransactionsRequestSerializationTest) {
BlockTransactionsRequest req1;
req1.blockhash = GetRandHash();
req1.indexes.resize(4);
req1.indexes[0] = 0;
req1.indexes[1] = 1;
req1.indexes[2] = 3;
req1.indexes[3] = 4;
CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
stream << req1;
BlockTransactionsRequest req2;
stream >> req2;
BOOST_CHECK_EQUAL(req1.blockhash.ToString(), req2.blockhash.ToString());
BOOST_CHECK_EQUAL(req1.indexes.size(), req2.indexes.size());
BOOST_CHECK_EQUAL(req1.indexes[0], req2.indexes[0]);
BOOST_CHECK_EQUAL(req1.indexes[1], req2.indexes[1]);
BOOST_CHECK_EQUAL(req1.indexes[2], req2.indexes[2]);
BOOST_CHECK_EQUAL(req1.indexes[3], req2.indexes[3]);
}
BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/mempool_tests.cpp b/src/test/mempool_tests.cpp
index 033a50f94..003daa203 100644
--- a/src/test/mempool_tests.cpp
+++ b/src/test/mempool_tests.cpp
@@ -1,581 +1,578 @@
// Copyright (c) 2011-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "policy/policy.h"
#include "txmempool.h"
#include "util.h"
#include "test/test_bitcoin.h"
#include <boost/test/unit_test.hpp>
#include <list>
#include <vector>
BOOST_FIXTURE_TEST_SUITE(mempool_tests, TestingSetup)
BOOST_AUTO_TEST_CASE(MempoolRemoveTest)
{
// Test CTxMemPool::remove functionality
TestMemPoolEntryHelper entry;
// Parent transaction with three children,
// and three grand-children:
CMutableTransaction txParent;
txParent.vin.resize(1);
txParent.vin[0].scriptSig = CScript() << OP_11;
txParent.vout.resize(3);
for (int i = 0; i < 3; i++)
{
txParent.vout[i].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
txParent.vout[i].nValue = 33000LL;
}
CMutableTransaction txChild[3];
for (int i = 0; i < 3; i++)
{
txChild[i].vin.resize(1);
txChild[i].vin[0].scriptSig = CScript() << OP_11;
txChild[i].vin[0].prevout.hash = txParent.GetHash();
txChild[i].vin[0].prevout.n = i;
txChild[i].vout.resize(1);
txChild[i].vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
txChild[i].vout[0].nValue = 11000LL;
}
CMutableTransaction txGrandChild[3];
for (int i = 0; i < 3; i++)
{
txGrandChild[i].vin.resize(1);
txGrandChild[i].vin[0].scriptSig = CScript() << OP_11;
txGrandChild[i].vin[0].prevout.hash = txChild[i].GetHash();
txGrandChild[i].vin[0].prevout.n = 0;
txGrandChild[i].vout.resize(1);
txGrandChild[i].vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
txGrandChild[i].vout[0].nValue = 11000LL;
}
CTxMemPool testPool(CFeeRate(0));
std::list<CTransaction> removed;
// Nothing in pool, remove should do nothing:
- testPool.removeRecursive(txParent, removed);
+ testPool.removeRecursive(txParent, &removed);
BOOST_CHECK_EQUAL(removed.size(), 0);
// Just the parent:
testPool.addUnchecked(txParent.GetHash(), entry.FromTx(txParent));
- testPool.removeRecursive(txParent, removed);
+ testPool.removeRecursive(txParent, &removed);
BOOST_CHECK_EQUAL(removed.size(), 1);
removed.clear();
// Parent, children, grandchildren:
testPool.addUnchecked(txParent.GetHash(), entry.FromTx(txParent));
for (int i = 0; i < 3; i++)
{
testPool.addUnchecked(txChild[i].GetHash(), entry.FromTx(txChild[i]));
testPool.addUnchecked(txGrandChild[i].GetHash(), entry.FromTx(txGrandChild[i]));
}
// Remove Child[0], GrandChild[0] should be removed:
- testPool.removeRecursive(txChild[0], removed);
+ testPool.removeRecursive(txChild[0], &removed);
BOOST_CHECK_EQUAL(removed.size(), 2);
removed.clear();
// ... make sure grandchild and child are gone:
- testPool.removeRecursive(txGrandChild[0], removed);
+ testPool.removeRecursive(txGrandChild[0], &removed);
BOOST_CHECK_EQUAL(removed.size(), 0);
- testPool.removeRecursive(txChild[0], removed);
+ testPool.removeRecursive(txChild[0], &removed);
BOOST_CHECK_EQUAL(removed.size(), 0);
// Remove parent, all children/grandchildren should go:
- testPool.removeRecursive(txParent, removed);
+ testPool.removeRecursive(txParent, &removed);
BOOST_CHECK_EQUAL(removed.size(), 5);
BOOST_CHECK_EQUAL(testPool.size(), 0);
removed.clear();
// Add children and grandchildren, but NOT the parent (simulate the parent being in a block)
for (int i = 0; i < 3; i++)
{
testPool.addUnchecked(txChild[i].GetHash(), entry.FromTx(txChild[i]));
testPool.addUnchecked(txGrandChild[i].GetHash(), entry.FromTx(txGrandChild[i]));
}
// Now remove the parent, as might happen if a block-re-org occurs but the parent cannot be
// put into the mempool (maybe because it is non-standard):
- testPool.removeRecursive(txParent, removed);
+ testPool.removeRecursive(txParent, &removed);
BOOST_CHECK_EQUAL(removed.size(), 6);
BOOST_CHECK_EQUAL(testPool.size(), 0);
removed.clear();
}
template<typename name>
void CheckSort(CTxMemPool &pool, std::vector<std::string> &sortedOrder)
{
BOOST_CHECK_EQUAL(pool.size(), sortedOrder.size());
typename CTxMemPool::indexed_transaction_set::index<name>::type::iterator it = pool.mapTx.get<name>().begin();
int count=0;
for (; it != pool.mapTx.get<name>().end(); ++it, ++count) {
BOOST_CHECK_EQUAL(it->GetTx().GetHash().ToString(), sortedOrder[count]);
}
}
BOOST_AUTO_TEST_CASE(MempoolIndexingTest)
{
CTxMemPool pool(CFeeRate(0));
TestMemPoolEntryHelper entry;
entry.hadNoDependencies = true;
/* 3rd highest fee */
CMutableTransaction tx1 = CMutableTransaction();
tx1.vout.resize(1);
tx1.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx1.vout[0].nValue = 10 * COIN;
pool.addUnchecked(tx1.GetHash(), entry.Fee(10000LL).Priority(10.0).FromTx(tx1));
/* highest fee */
CMutableTransaction tx2 = CMutableTransaction();
tx2.vout.resize(1);
tx2.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx2.vout[0].nValue = 2 * COIN;
pool.addUnchecked(tx2.GetHash(), entry.Fee(20000LL).Priority(9.0).FromTx(tx2));
/* lowest fee */
CMutableTransaction tx3 = CMutableTransaction();
tx3.vout.resize(1);
tx3.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx3.vout[0].nValue = 5 * COIN;
pool.addUnchecked(tx3.GetHash(), entry.Fee(0LL).Priority(100.0).FromTx(tx3));
/* 2nd highest fee */
CMutableTransaction tx4 = CMutableTransaction();
tx4.vout.resize(1);
tx4.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx4.vout[0].nValue = 6 * COIN;
pool.addUnchecked(tx4.GetHash(), entry.Fee(15000LL).Priority(1.0).FromTx(tx4));
/* equal fee rate to tx1, but newer */
CMutableTransaction tx5 = CMutableTransaction();
tx5.vout.resize(1);
tx5.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx5.vout[0].nValue = 11 * COIN;
entry.nTime = 1;
entry.dPriority = 10.0;
pool.addUnchecked(tx5.GetHash(), entry.Fee(10000LL).FromTx(tx5));
BOOST_CHECK_EQUAL(pool.size(), 5);
std::vector<std::string> sortedOrder;
sortedOrder.resize(5);
sortedOrder[0] = tx3.GetHash().ToString(); // 0
sortedOrder[1] = tx5.GetHash().ToString(); // 10000
sortedOrder[2] = tx1.GetHash().ToString(); // 10000
sortedOrder[3] = tx4.GetHash().ToString(); // 15000
sortedOrder[4] = tx2.GetHash().ToString(); // 20000
CheckSort<descendant_score>(pool, sortedOrder);
/* low fee but with high fee child */
/* tx6 -> tx7 -> tx8, tx9 -> tx10 */
CMutableTransaction tx6 = CMutableTransaction();
tx6.vout.resize(1);
tx6.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx6.vout[0].nValue = 20 * COIN;
pool.addUnchecked(tx6.GetHash(), entry.Fee(0LL).FromTx(tx6));
BOOST_CHECK_EQUAL(pool.size(), 6);
// Check that at this point, tx6 is sorted low
sortedOrder.insert(sortedOrder.begin(), tx6.GetHash().ToString());
CheckSort<descendant_score>(pool, sortedOrder);
CTxMemPool::setEntries setAncestors;
setAncestors.insert(pool.mapTx.find(tx6.GetHash()));
CMutableTransaction tx7 = CMutableTransaction();
tx7.vin.resize(1);
tx7.vin[0].prevout = COutPoint(tx6.GetHash(), 0);
tx7.vin[0].scriptSig = CScript() << OP_11;
tx7.vout.resize(2);
tx7.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx7.vout[0].nValue = 10 * COIN;
tx7.vout[1].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx7.vout[1].nValue = 1 * COIN;
CTxMemPool::setEntries setAncestorsCalculated;
std::string dummy;
BOOST_CHECK_EQUAL(pool.CalculateMemPoolAncestors(entry.Fee(2000000LL).FromTx(tx7), setAncestorsCalculated, 100, 1000000, 1000, 1000000, dummy), true);
BOOST_CHECK(setAncestorsCalculated == setAncestors);
pool.addUnchecked(tx7.GetHash(), entry.FromTx(tx7), setAncestors);
BOOST_CHECK_EQUAL(pool.size(), 7);
// Now tx6 should be sorted higher (high fee child): tx7, tx6, tx2, ...
sortedOrder.erase(sortedOrder.begin());
sortedOrder.push_back(tx6.GetHash().ToString());
sortedOrder.push_back(tx7.GetHash().ToString());
CheckSort<descendant_score>(pool, sortedOrder);
/* low fee child of tx7 */
CMutableTransaction tx8 = CMutableTransaction();
tx8.vin.resize(1);
tx8.vin[0].prevout = COutPoint(tx7.GetHash(), 0);
tx8.vin[0].scriptSig = CScript() << OP_11;
tx8.vout.resize(1);
tx8.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx8.vout[0].nValue = 10 * COIN;
setAncestors.insert(pool.mapTx.find(tx7.GetHash()));
pool.addUnchecked(tx8.GetHash(), entry.Fee(0LL).Time(2).FromTx(tx8), setAncestors);
// Now tx8 should be sorted low, but tx6/tx both high
sortedOrder.insert(sortedOrder.begin(), tx8.GetHash().ToString());
CheckSort<descendant_score>(pool, sortedOrder);
/* low fee child of tx7 */
CMutableTransaction tx9 = CMutableTransaction();
tx9.vin.resize(1);
tx9.vin[0].prevout = COutPoint(tx7.GetHash(), 1);
tx9.vin[0].scriptSig = CScript() << OP_11;
tx9.vout.resize(1);
tx9.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx9.vout[0].nValue = 1 * COIN;
pool.addUnchecked(tx9.GetHash(), entry.Fee(0LL).Time(3).FromTx(tx9), setAncestors);
// tx9 should be sorted low
BOOST_CHECK_EQUAL(pool.size(), 9);
sortedOrder.insert(sortedOrder.begin(), tx9.GetHash().ToString());
CheckSort<descendant_score>(pool, sortedOrder);
std::vector<std::string> snapshotOrder = sortedOrder;
setAncestors.insert(pool.mapTx.find(tx8.GetHash()));
setAncestors.insert(pool.mapTx.find(tx9.GetHash()));
/* tx10 depends on tx8 and tx9 and has a high fee*/
CMutableTransaction tx10 = CMutableTransaction();
tx10.vin.resize(2);
tx10.vin[0].prevout = COutPoint(tx8.GetHash(), 0);
tx10.vin[0].scriptSig = CScript() << OP_11;
tx10.vin[1].prevout = COutPoint(tx9.GetHash(), 0);
tx10.vin[1].scriptSig = CScript() << OP_11;
tx10.vout.resize(1);
tx10.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx10.vout[0].nValue = 10 * COIN;
setAncestorsCalculated.clear();
BOOST_CHECK_EQUAL(pool.CalculateMemPoolAncestors(entry.Fee(200000LL).Time(4).FromTx(tx10), setAncestorsCalculated, 100, 1000000, 1000, 1000000, dummy), true);
BOOST_CHECK(setAncestorsCalculated == setAncestors);
pool.addUnchecked(tx10.GetHash(), entry.FromTx(tx10), setAncestors);
/**
* tx8 and tx9 should both now be sorted higher
* Final order after tx10 is added:
*
* tx3 = 0 (1)
* tx5 = 10000 (1)
* tx1 = 10000 (1)
* tx4 = 15000 (1)
* tx2 = 20000 (1)
* tx9 = 200k (2 txs)
* tx8 = 200k (2 txs)
* tx10 = 200k (1 tx)
* tx6 = 2.2M (5 txs)
* tx7 = 2.2M (4 txs)
*/
sortedOrder.erase(sortedOrder.begin(), sortedOrder.begin()+2); // take out tx9, tx8 from the beginning
sortedOrder.insert(sortedOrder.begin()+5, tx9.GetHash().ToString());
sortedOrder.insert(sortedOrder.begin()+6, tx8.GetHash().ToString());
sortedOrder.insert(sortedOrder.begin()+7, tx10.GetHash().ToString()); // tx10 is just before tx6
CheckSort<descendant_score>(pool, sortedOrder);
// there should be 10 transactions in the mempool
BOOST_CHECK_EQUAL(pool.size(), 10);
// Now try removing tx10 and verify the sort order returns to normal
- std::list<CTransaction> removed;
- pool.removeRecursive(pool.mapTx.find(tx10.GetHash())->GetTx(), removed);
+ pool.removeRecursive(pool.mapTx.find(tx10.GetHash())->GetTx());
CheckSort<descendant_score>(pool, snapshotOrder);
- pool.removeRecursive(pool.mapTx.find(tx9.GetHash())->GetTx(), removed);
- pool.removeRecursive(pool.mapTx.find(tx8.GetHash())->GetTx(), removed);
+ pool.removeRecursive(pool.mapTx.find(tx9.GetHash())->GetTx());
+ pool.removeRecursive(pool.mapTx.find(tx8.GetHash())->GetTx());
/* Now check the sort on the mining score index.
* Final order should be:
*
* tx7 (2M)
* tx2 (20k)
* tx4 (15000)
* tx1/tx5 (10000)
* tx3/6 (0)
* (Ties resolved by hash)
*/
sortedOrder.clear();
sortedOrder.push_back(tx7.GetHash().ToString());
sortedOrder.push_back(tx2.GetHash().ToString());
sortedOrder.push_back(tx4.GetHash().ToString());
if (tx1.GetHash() < tx5.GetHash()) {
sortedOrder.push_back(tx5.GetHash().ToString());
sortedOrder.push_back(tx1.GetHash().ToString());
} else {
sortedOrder.push_back(tx1.GetHash().ToString());
sortedOrder.push_back(tx5.GetHash().ToString());
}
if (tx3.GetHash() < tx6.GetHash()) {
sortedOrder.push_back(tx6.GetHash().ToString());
sortedOrder.push_back(tx3.GetHash().ToString());
} else {
sortedOrder.push_back(tx3.GetHash().ToString());
sortedOrder.push_back(tx6.GetHash().ToString());
}
CheckSort<mining_score>(pool, sortedOrder);
}
BOOST_AUTO_TEST_CASE(MempoolAncestorIndexingTest)
{
CTxMemPool pool(CFeeRate(0));
TestMemPoolEntryHelper entry;
entry.hadNoDependencies = true;
/* 3rd highest fee */
CMutableTransaction tx1 = CMutableTransaction();
tx1.vout.resize(1);
tx1.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx1.vout[0].nValue = 10 * COIN;
pool.addUnchecked(tx1.GetHash(), entry.Fee(10000LL).Priority(10.0).FromTx(tx1));
/* highest fee */
CMutableTransaction tx2 = CMutableTransaction();
tx2.vout.resize(1);
tx2.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx2.vout[0].nValue = 2 * COIN;
pool.addUnchecked(tx2.GetHash(), entry.Fee(20000LL).Priority(9.0).FromTx(tx2));
uint64_t tx2Size = GetVirtualTransactionSize(tx2);
/* lowest fee */
CMutableTransaction tx3 = CMutableTransaction();
tx3.vout.resize(1);
tx3.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx3.vout[0].nValue = 5 * COIN;
pool.addUnchecked(tx3.GetHash(), entry.Fee(0LL).Priority(100.0).FromTx(tx3));
/* 2nd highest fee */
CMutableTransaction tx4 = CMutableTransaction();
tx4.vout.resize(1);
tx4.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx4.vout[0].nValue = 6 * COIN;
pool.addUnchecked(tx4.GetHash(), entry.Fee(15000LL).Priority(1.0).FromTx(tx4));
/* equal fee rate to tx1, but newer */
CMutableTransaction tx5 = CMutableTransaction();
tx5.vout.resize(1);
tx5.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx5.vout[0].nValue = 11 * COIN;
pool.addUnchecked(tx5.GetHash(), entry.Fee(10000LL).FromTx(tx5));
BOOST_CHECK_EQUAL(pool.size(), 5);
std::vector<std::string> sortedOrder;
sortedOrder.resize(5);
sortedOrder[0] = tx2.GetHash().ToString(); // 20000
sortedOrder[1] = tx4.GetHash().ToString(); // 15000
// tx1 and tx5 are both 10000
// Ties are broken by hash, not timestamp, so determine which
// hash comes first.
if (tx1.GetHash() < tx5.GetHash()) {
sortedOrder[2] = tx1.GetHash().ToString();
sortedOrder[3] = tx5.GetHash().ToString();
} else {
sortedOrder[2] = tx5.GetHash().ToString();
sortedOrder[3] = tx1.GetHash().ToString();
}
sortedOrder[4] = tx3.GetHash().ToString(); // 0
CheckSort<ancestor_score>(pool, sortedOrder);
/* low fee parent with high fee child */
/* tx6 (0) -> tx7 (high) */
CMutableTransaction tx6 = CMutableTransaction();
tx6.vout.resize(1);
tx6.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx6.vout[0].nValue = 20 * COIN;
uint64_t tx6Size = GetVirtualTransactionSize(tx6);
pool.addUnchecked(tx6.GetHash(), entry.Fee(0LL).FromTx(tx6));
BOOST_CHECK_EQUAL(pool.size(), 6);
sortedOrder.push_back(tx6.GetHash().ToString());
CheckSort<ancestor_score>(pool, sortedOrder);
CMutableTransaction tx7 = CMutableTransaction();
tx7.vin.resize(1);
tx7.vin[0].prevout = COutPoint(tx6.GetHash(), 0);
tx7.vin[0].scriptSig = CScript() << OP_11;
tx7.vout.resize(1);
tx7.vout[0].scriptPubKey = CScript() << OP_11 << OP_EQUAL;
tx7.vout[0].nValue = 10 * COIN;
uint64_t tx7Size = GetVirtualTransactionSize(tx7);
/* set the fee to just below tx2's feerate when including ancestor */
CAmount fee = (20000/tx2Size)*(tx7Size + tx6Size) - 1;
//CTxMemPoolEntry entry7(tx7, fee, 2, 10.0, 1, true);
pool.addUnchecked(tx7.GetHash(), entry.Fee(fee).FromTx(tx7));
BOOST_CHECK_EQUAL(pool.size(), 7);
sortedOrder.insert(sortedOrder.begin()+1, tx7.GetHash().ToString());
CheckSort<ancestor_score>(pool, sortedOrder);
/* after tx6 is mined, tx7 should move up in the sort */
std::vector<CTransaction> vtx;
vtx.push_back(tx6);
- std::list<CTransaction> dummy;
- pool.removeForBlock(vtx, 1, dummy, false);
+ pool.removeForBlock(vtx, 1, NULL, false);
sortedOrder.erase(sortedOrder.begin()+1);
sortedOrder.pop_back();
sortedOrder.insert(sortedOrder.begin(), tx7.GetHash().ToString());
CheckSort<ancestor_score>(pool, sortedOrder);
}
BOOST_AUTO_TEST_CASE(MempoolSizeLimitTest)
{
CTxMemPool pool(CFeeRate(1000));
TestMemPoolEntryHelper entry;
entry.dPriority = 10.0;
CMutableTransaction tx1 = CMutableTransaction();
tx1.vin.resize(1);
tx1.vin[0].scriptSig = CScript() << OP_1;
tx1.vout.resize(1);
tx1.vout[0].scriptPubKey = CScript() << OP_1 << OP_EQUAL;
tx1.vout[0].nValue = 10 * COIN;
pool.addUnchecked(tx1.GetHash(), entry.Fee(10000LL).FromTx(tx1, &pool));
CMutableTransaction tx2 = CMutableTransaction();
tx2.vin.resize(1);
tx2.vin[0].scriptSig = CScript() << OP_2;
tx2.vout.resize(1);
tx2.vout[0].scriptPubKey = CScript() << OP_2 << OP_EQUAL;
tx2.vout[0].nValue = 10 * COIN;
pool.addUnchecked(tx2.GetHash(), entry.Fee(5000LL).FromTx(tx2, &pool));
pool.TrimToSize(pool.DynamicMemoryUsage()); // should do nothing
BOOST_CHECK(pool.exists(tx1.GetHash()));
BOOST_CHECK(pool.exists(tx2.GetHash()));
pool.TrimToSize(pool.DynamicMemoryUsage() * 3 / 4); // should remove the lower-feerate transaction
BOOST_CHECK(pool.exists(tx1.GetHash()));
BOOST_CHECK(!pool.exists(tx2.GetHash()));
pool.addUnchecked(tx2.GetHash(), entry.FromTx(tx2, &pool));
CMutableTransaction tx3 = CMutableTransaction();
tx3.vin.resize(1);
tx3.vin[0].prevout = COutPoint(tx2.GetHash(), 0);
tx3.vin[0].scriptSig = CScript() << OP_2;
tx3.vout.resize(1);
tx3.vout[0].scriptPubKey = CScript() << OP_3 << OP_EQUAL;
tx3.vout[0].nValue = 10 * COIN;
pool.addUnchecked(tx3.GetHash(), entry.Fee(20000LL).FromTx(tx3, &pool));
pool.TrimToSize(pool.DynamicMemoryUsage() * 3 / 4); // tx3 should pay for tx2 (CPFP)
BOOST_CHECK(!pool.exists(tx1.GetHash()));
BOOST_CHECK(pool.exists(tx2.GetHash()));
BOOST_CHECK(pool.exists(tx3.GetHash()));
pool.TrimToSize(GetVirtualTransactionSize(tx1)); // mempool is limited to tx1's size in memory usage, so nothing fits
BOOST_CHECK(!pool.exists(tx1.GetHash()));
BOOST_CHECK(!pool.exists(tx2.GetHash()));
BOOST_CHECK(!pool.exists(tx3.GetHash()));
CFeeRate maxFeeRateRemoved(25000, GetVirtualTransactionSize(tx3) + GetVirtualTransactionSize(tx2));
BOOST_CHECK_EQUAL(pool.GetMinFee(1).GetFeePerK(), maxFeeRateRemoved.GetFeePerK() + 1000);
CMutableTransaction tx4 = CMutableTransaction();
tx4.vin.resize(2);
tx4.vin[0].prevout.SetNull();
tx4.vin[0].scriptSig = CScript() << OP_4;
tx4.vin[1].prevout.SetNull();
tx4.vin[1].scriptSig = CScript() << OP_4;
tx4.vout.resize(2);
tx4.vout[0].scriptPubKey = CScript() << OP_4 << OP_EQUAL;
tx4.vout[0].nValue = 10 * COIN;
tx4.vout[1].scriptPubKey = CScript() << OP_4 << OP_EQUAL;
tx4.vout[1].nValue = 10 * COIN;
CMutableTransaction tx5 = CMutableTransaction();
tx5.vin.resize(2);
tx5.vin[0].prevout = COutPoint(tx4.GetHash(), 0);
tx5.vin[0].scriptSig = CScript() << OP_4;
tx5.vin[1].prevout.SetNull();
tx5.vin[1].scriptSig = CScript() << OP_5;
tx5.vout.resize(2);
tx5.vout[0].scriptPubKey = CScript() << OP_5 << OP_EQUAL;
tx5.vout[0].nValue = 10 * COIN;
tx5.vout[1].scriptPubKey = CScript() << OP_5 << OP_EQUAL;
tx5.vout[1].nValue = 10 * COIN;
CMutableTransaction tx6 = CMutableTransaction();
tx6.vin.resize(2);
tx6.vin[0].prevout = COutPoint(tx4.GetHash(), 1);
tx6.vin[0].scriptSig = CScript() << OP_4;
tx6.vin[1].prevout.SetNull();
tx6.vin[1].scriptSig = CScript() << OP_6;
tx6.vout.resize(2);
tx6.vout[0].scriptPubKey = CScript() << OP_6 << OP_EQUAL;
tx6.vout[0].nValue = 10 * COIN;
tx6.vout[1].scriptPubKey = CScript() << OP_6 << OP_EQUAL;
tx6.vout[1].nValue = 10 * COIN;
CMutableTransaction tx7 = CMutableTransaction();
tx7.vin.resize(2);
tx7.vin[0].prevout = COutPoint(tx5.GetHash(), 0);
tx7.vin[0].scriptSig = CScript() << OP_5;
tx7.vin[1].prevout = COutPoint(tx6.GetHash(), 0);
tx7.vin[1].scriptSig = CScript() << OP_6;
tx7.vout.resize(2);
tx7.vout[0].scriptPubKey = CScript() << OP_7 << OP_EQUAL;
tx7.vout[0].nValue = 10 * COIN;
tx7.vout[1].scriptPubKey = CScript() << OP_7 << OP_EQUAL;
tx7.vout[1].nValue = 10 * COIN;
pool.addUnchecked(tx4.GetHash(), entry.Fee(7000LL).FromTx(tx4, &pool));
pool.addUnchecked(tx5.GetHash(), entry.Fee(1000LL).FromTx(tx5, &pool));
pool.addUnchecked(tx6.GetHash(), entry.Fee(1100LL).FromTx(tx6, &pool));
pool.addUnchecked(tx7.GetHash(), entry.Fee(9000LL).FromTx(tx7, &pool));
// we only require this remove, at max, 2 txn, because its not clear what we're really optimizing for aside from that
pool.TrimToSize(pool.DynamicMemoryUsage() - 1);
BOOST_CHECK(pool.exists(tx4.GetHash()));
BOOST_CHECK(pool.exists(tx6.GetHash()));
BOOST_CHECK(!pool.exists(tx7.GetHash()));
if (!pool.exists(tx5.GetHash()))
pool.addUnchecked(tx5.GetHash(), entry.Fee(1000LL).FromTx(tx5, &pool));
pool.addUnchecked(tx7.GetHash(), entry.Fee(9000LL).FromTx(tx7, &pool));
pool.TrimToSize(pool.DynamicMemoryUsage() / 2); // should maximize mempool size by only removing 5/7
BOOST_CHECK(pool.exists(tx4.GetHash()));
BOOST_CHECK(!pool.exists(tx5.GetHash()));
BOOST_CHECK(pool.exists(tx6.GetHash()));
BOOST_CHECK(!pool.exists(tx7.GetHash()));
pool.addUnchecked(tx5.GetHash(), entry.Fee(1000LL).FromTx(tx5, &pool));
pool.addUnchecked(tx7.GetHash(), entry.Fee(9000LL).FromTx(tx7, &pool));
std::vector<CTransaction> vtx;
- std::list<CTransaction> conflicts;
SetMockTime(42);
SetMockTime(42 + CTxMemPool::ROLLING_FEE_HALFLIFE);
BOOST_CHECK_EQUAL(pool.GetMinFee(1).GetFeePerK(), maxFeeRateRemoved.GetFeePerK() + 1000);
// ... we should keep the same min fee until we get a block
- pool.removeForBlock(vtx, 1, conflicts);
+ pool.removeForBlock(vtx, 1);
SetMockTime(42 + 2*CTxMemPool::ROLLING_FEE_HALFLIFE);
BOOST_CHECK_EQUAL(pool.GetMinFee(1).GetFeePerK(), (maxFeeRateRemoved.GetFeePerK() + 1000)/2);
// ... then feerate should drop 1/2 each halflife
SetMockTime(42 + 2*CTxMemPool::ROLLING_FEE_HALFLIFE + CTxMemPool::ROLLING_FEE_HALFLIFE/2);
BOOST_CHECK_EQUAL(pool.GetMinFee(pool.DynamicMemoryUsage() * 5 / 2).GetFeePerK(), (maxFeeRateRemoved.GetFeePerK() + 1000)/4);
// ... with a 1/2 halflife when mempool is < 1/2 its target size
SetMockTime(42 + 2*CTxMemPool::ROLLING_FEE_HALFLIFE + CTxMemPool::ROLLING_FEE_HALFLIFE/2 + CTxMemPool::ROLLING_FEE_HALFLIFE/4);
BOOST_CHECK_EQUAL(pool.GetMinFee(pool.DynamicMemoryUsage() * 9 / 2).GetFeePerK(), (maxFeeRateRemoved.GetFeePerK() + 1000)/8);
// ... with a 1/4 halflife when mempool is < 1/4 its target size
SetMockTime(42 + 7*CTxMemPool::ROLLING_FEE_HALFLIFE + CTxMemPool::ROLLING_FEE_HALFLIFE/2 + CTxMemPool::ROLLING_FEE_HALFLIFE/4);
BOOST_CHECK_EQUAL(pool.GetMinFee(1).GetFeePerK(), 1000);
// ... but feerate should never drop below 1000
SetMockTime(42 + 8*CTxMemPool::ROLLING_FEE_HALFLIFE + CTxMemPool::ROLLING_FEE_HALFLIFE/2 + CTxMemPool::ROLLING_FEE_HALFLIFE/4);
BOOST_CHECK_EQUAL(pool.GetMinFee(1).GetFeePerK(), 0);
// ... unless it has gone all the way to 0 (after getting past 1000/2)
SetMockTime(0);
}
BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index d6d7b5716..a94979fd7 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -1,497 +1,496 @@
// Copyright (c) 2011-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "chainparams.h"
#include "coins.h"
#include "consensus/consensus.h"
#include "consensus/merkle.h"
#include "consensus/validation.h"
#include "main.h"
#include "miner.h"
#include "pubkey.h"
#include "script/standard.h"
#include "txmempool.h"
#include "uint256.h"
#include "util.h"
#include "utilstrencodings.h"
#include "test/test_bitcoin.h"
#include <memory>
#include <boost/test/unit_test.hpp>
BOOST_FIXTURE_TEST_SUITE(miner_tests, TestingSetup)
static
struct {
unsigned char extranonce;
unsigned int nonce;
} blockinfo[] = {
{4, 0xa4a3e223}, {2, 0x15c32f9e}, {1, 0x0375b547}, {1, 0x7004a8a5},
{2, 0xce440296}, {2, 0x52cfe198}, {1, 0x77a72cd0}, {2, 0xbb5d6f84},
{2, 0x83f30c2c}, {1, 0x48a73d5b}, {1, 0xef7dcd01}, {2, 0x6809c6c4},
{2, 0x0883ab3c}, {1, 0x087bbbe2}, {2, 0x2104a814}, {2, 0xdffb6daa},
{1, 0xee8a0a08}, {2, 0xba4237c1}, {1, 0xa70349dc}, {1, 0x344722bb},
{3, 0xd6294733}, {2, 0xec9f5c94}, {2, 0xca2fbc28}, {1, 0x6ba4f406},
{2, 0x015d4532}, {1, 0x6e119b7c}, {2, 0x43e8f314}, {2, 0x27962f38},
{2, 0xb571b51b}, {2, 0xb36bee23}, {2, 0xd17924a8}, {2, 0x6bc212d9},
{1, 0x630d4948}, {2, 0x9a4c4ebb}, {2, 0x554be537}, {1, 0xd63ddfc7},
{2, 0xa10acc11}, {1, 0x759a8363}, {2, 0xfb73090d}, {1, 0xe82c6a34},
{1, 0xe33e92d7}, {3, 0x658ef5cb}, {2, 0xba32ff22}, {5, 0x0227a10c},
{1, 0xa9a70155}, {5, 0xd096d809}, {1, 0x37176174}, {1, 0x830b8d0f},
{1, 0xc6e3910e}, {2, 0x823f3ca8}, {1, 0x99850849}, {1, 0x7521fb81},
{1, 0xaacaabab}, {1, 0xd645a2eb}, {5, 0x7aea1781}, {5, 0x9d6e4b78},
{1, 0x4ce90fd8}, {1, 0xabdc832d}, {6, 0x4a34f32a}, {2, 0xf2524c1c},
{2, 0x1bbeb08a}, {1, 0xad47f480}, {1, 0x9f026aeb}, {1, 0x15a95049},
{2, 0xd1cb95b2}, {2, 0xf84bbda5}, {1, 0x0fa62cd1}, {1, 0xe05f9169},
{1, 0x78d194a9}, {5, 0x3e38147b}, {5, 0x737ba0d4}, {1, 0x63378e10},
{1, 0x6d5f91cf}, {2, 0x88612eb8}, {2, 0xe9639484}, {1, 0xb7fabc9d},
{2, 0x19b01592}, {1, 0x5a90dd31}, {2, 0x5bd7e028}, {2, 0x94d00323},
{1, 0xa9b9c01a}, {1, 0x3a40de61}, {1, 0x56e7eec7}, {5, 0x859f7ef6},
{1, 0xfd8e5630}, {1, 0x2b0c9f7f}, {1, 0xba700e26}, {1, 0x7170a408},
{1, 0x70de86a8}, {1, 0x74d64cd5}, {1, 0x49e738a1}, {2, 0x6910b602},
{0, 0x643c565f}, {1, 0x54264b3f}, {2, 0x97ea6396}, {2, 0x55174459},
{2, 0x03e8779a}, {1, 0x98f34d8f}, {1, 0xc07b2b07}, {1, 0xdfe29668},
{1, 0x3141c7c1}, {1, 0xb3b595f4}, {1, 0x735abf08}, {5, 0x623bfbce},
{2, 0xd351e722}, {1, 0xf4ca48c9}, {1, 0x5b19c670}, {1, 0xa164bf0e},
{2, 0xbbbeb305}, {2, 0xfe1c810a},
};
CBlockIndex CreateBlockIndex(int nHeight)
{
CBlockIndex index;
index.nHeight = nHeight;
index.pprev = chainActive.Tip();
return index;
}
bool TestSequenceLocks(const CTransaction &tx, int flags)
{
LOCK(mempool.cs);
return CheckSequenceLocks(tx, flags);
}
// Test suite for ancestor feerate transaction selection.
// Implemented as an additional function, rather than a separate test case,
// to allow reusing the blockchain created in CreateNewBlock_validity.
// Note that this test assumes blockprioritysize is 0.
void TestPackageSelection(const CChainParams& chainparams, CScript scriptPubKey, std::vector<CTransaction *>& txFirst)
{
// Test the ancestor feerate transaction selection.
TestMemPoolEntryHelper entry;
// Test that a medium fee transaction will be selected after a higher fee
// rate package with a low fee rate parent.
CMutableTransaction tx;
tx.vin.resize(1);
tx.vin[0].scriptSig = CScript() << OP_1;
tx.vin[0].prevout.hash = txFirst[0]->GetHash();
tx.vin[0].prevout.n = 0;
tx.vout.resize(1);
tx.vout[0].nValue = 5000000000LL - 1000;
// This tx has a low fee: 1000 satoshis
uint256 hashParentTx = tx.GetHash(); // save this txid for later use
mempool.addUnchecked(hashParentTx, entry.Fee(1000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
// This tx has a medium fee: 10000 satoshis
tx.vin[0].prevout.hash = txFirst[1]->GetHash();
tx.vout[0].nValue = 5000000000LL - 10000;
uint256 hashMediumFeeTx = tx.GetHash();
mempool.addUnchecked(hashMediumFeeTx, entry.Fee(10000).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
// This tx has a high fee, but depends on the first transaction
tx.vin[0].prevout.hash = hashParentTx;
tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 50k satoshi fee
uint256 hashHighFeeTx = tx.GetHash();
mempool.addUnchecked(hashHighFeeTx, entry.Fee(50000).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
std::unique_ptr<CBlockTemplate> pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
BOOST_CHECK(pblocktemplate->block.vtx[1].GetHash() == hashParentTx);
BOOST_CHECK(pblocktemplate->block.vtx[2].GetHash() == hashHighFeeTx);
BOOST_CHECK(pblocktemplate->block.vtx[3].GetHash() == hashMediumFeeTx);
// Test that a package below the min relay fee doesn't get included
tx.vin[0].prevout.hash = hashHighFeeTx;
tx.vout[0].nValue = 5000000000LL - 1000 - 50000; // 0 fee
uint256 hashFreeTx = tx.GetHash();
mempool.addUnchecked(hashFreeTx, entry.Fee(0).FromTx(tx));
size_t freeTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
// Calculate a fee on child transaction that will put the package just
// below the min relay fee (assuming 1 child tx of the same size).
CAmount feeToUse = minRelayTxFee.GetFee(2*freeTxSize) - 1;
tx.vin[0].prevout.hash = hashFreeTx;
tx.vout[0].nValue = 5000000000LL - 1000 - 50000 - feeToUse;
uint256 hashLowFeeTx = tx.GetHash();
mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse).FromTx(tx));
pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
// Verify that the free tx and the low fee tx didn't get selected
for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashFreeTx);
BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashLowFeeTx);
}
// Test that packages above the min relay fee do get included, even if one
// of the transactions is below the min relay fee
// Remove the low fee transaction and replace with a higher fee transaction
- std::list<CTransaction> dummy;
- mempool.removeRecursive(tx, dummy);
+ mempool.removeRecursive(tx);
tx.vout[0].nValue -= 2; // Now we should be just over the min relay fee
hashLowFeeTx = tx.GetHash();
mempool.addUnchecked(hashLowFeeTx, entry.Fee(feeToUse+2).FromTx(tx));
pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
BOOST_CHECK(pblocktemplate->block.vtx[4].GetHash() == hashFreeTx);
BOOST_CHECK(pblocktemplate->block.vtx[5].GetHash() == hashLowFeeTx);
// Test that transaction selection properly updates ancestor fee
// calculations as ancestor transactions get included in a block.
// Add a 0-fee transaction that has 2 outputs.
tx.vin[0].prevout.hash = txFirst[2]->GetHash();
tx.vout.resize(2);
tx.vout[0].nValue = 5000000000LL - 100000000;
tx.vout[1].nValue = 100000000; // 1BTC output
uint256 hashFreeTx2 = tx.GetHash();
mempool.addUnchecked(hashFreeTx2, entry.Fee(0).SpendsCoinbase(true).FromTx(tx));
// This tx can't be mined by itself
tx.vin[0].prevout.hash = hashFreeTx2;
tx.vout.resize(1);
feeToUse = minRelayTxFee.GetFee(freeTxSize);
tx.vout[0].nValue = 5000000000LL - 100000000 - feeToUse;
uint256 hashLowFeeTx2 = tx.GetHash();
mempool.addUnchecked(hashLowFeeTx2, entry.Fee(feeToUse).SpendsCoinbase(false).FromTx(tx));
pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
// Verify that this tx isn't selected.
for (size_t i=0; i<pblocktemplate->block.vtx.size(); ++i) {
BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashFreeTx2);
BOOST_CHECK(pblocktemplate->block.vtx[i].GetHash() != hashLowFeeTx2);
}
// This tx will be mineable, and should cause hashLowFeeTx2 to be selected
// as well.
tx.vin[0].prevout.n = 1;
tx.vout[0].nValue = 100000000 - 10000; // 10k satoshi fee
mempool.addUnchecked(tx.GetHash(), entry.Fee(10000).FromTx(tx));
pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
BOOST_CHECK(pblocktemplate->block.vtx[8].GetHash() == hashLowFeeTx2);
}
// NOTE: These tests rely on CreateNewBlock doing its own self-validation!
BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
{
// Note that by default, these tests run with size accounting enabled.
const CChainParams& chainparams = Params(CBaseChainParams::MAIN);
CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
std::unique_ptr<CBlockTemplate> pblocktemplate;
CMutableTransaction tx,tx2;
CScript script;
uint256 hash;
TestMemPoolEntryHelper entry;
entry.nFee = 11;
entry.dPriority = 111.0;
entry.nHeight = 11;
LOCK(cs_main);
fCheckpointsEnabled = false;
// Simple block creation, nothing special yet:
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
// We can't make transactions until we have inputs
// Therefore, load 100 blocks :)
int baseheight = 0;
std::vector<CTransaction*>txFirst;
for (unsigned int i = 0; i < sizeof(blockinfo)/sizeof(*blockinfo); ++i)
{
CBlock *pblock = &pblocktemplate->block; // pointer for convenience
pblock->nVersion = 1;
pblock->nTime = chainActive.Tip()->GetMedianTimePast()+1;
CMutableTransaction txCoinbase(pblock->vtx[0]);
txCoinbase.nVersion = 1;
txCoinbase.vin[0].scriptSig = CScript();
txCoinbase.vin[0].scriptSig.push_back(blockinfo[i].extranonce);
txCoinbase.vin[0].scriptSig.push_back(chainActive.Height());
txCoinbase.vout[0].scriptPubKey = CScript();
pblock->vtx[0] = CTransaction(txCoinbase);
if (txFirst.size() == 0)
baseheight = chainActive.Height();
if (txFirst.size() < 4)
txFirst.push_back(new CTransaction(pblock->vtx[0]));
pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
pblock->nNonce = blockinfo[i].nonce;
CValidationState state;
BOOST_CHECK(ProcessNewBlock(state, chainparams, NULL, pblock, true, NULL));
BOOST_CHECK(state.IsValid());
pblock->hashPrevBlock = pblock->GetHash();
}
// Just to make sure we can still make simple blocks
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
const CAmount BLOCKSUBSIDY = 50*COIN;
const CAmount LOWFEE = CENT;
const CAmount HIGHFEE = COIN;
const CAmount HIGHERFEE = 4*COIN;
// block sigops > limit: 1000 CHECKMULTISIG + 1
tx.vin.resize(1);
// NOTE: OP_NOP is used to force 20 SigOps for the CHECKMULTISIG
tx.vin[0].scriptSig = CScript() << OP_0 << OP_0 << OP_0 << OP_NOP << OP_CHECKMULTISIG << OP_1;
tx.vin[0].prevout.hash = txFirst[0]->GetHash();
tx.vin[0].prevout.n = 0;
tx.vout.resize(1);
tx.vout[0].nValue = BLOCKSUBSIDY;
for (unsigned int i = 0; i < 1001; ++i)
{
tx.vout[0].nValue -= LOWFEE;
hash = tx.GetHash();
bool spendsCoinbase = (i == 0) ? true : false; // only first tx spends coinbase
// If we don't set the # of sig ops in the CTxMemPoolEntry, template creation fails
mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
tx.vin[0].prevout.hash = hash;
}
BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
mempool.clear();
tx.vin[0].prevout.hash = txFirst[0]->GetHash();
tx.vout[0].nValue = BLOCKSUBSIDY;
for (unsigned int i = 0; i < 1001; ++i)
{
tx.vout[0].nValue -= LOWFEE;
hash = tx.GetHash();
bool spendsCoinbase = (i == 0) ? true : false; // only first tx spends coinbase
// If we do set the # of sig ops in the CTxMemPoolEntry, template creation passes
mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).SigOpsCost(80).FromTx(tx));
tx.vin[0].prevout.hash = hash;
}
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
mempool.clear();
// block size > limit
tx.vin[0].scriptSig = CScript();
// 18 * (520char + DROP) + OP_1 = 9433 bytes
std::vector<unsigned char> vchData(520);
for (unsigned int i = 0; i < 18; ++i)
tx.vin[0].scriptSig << vchData << OP_DROP;
tx.vin[0].scriptSig << OP_1;
tx.vin[0].prevout.hash = txFirst[0]->GetHash();
tx.vout[0].nValue = BLOCKSUBSIDY;
for (unsigned int i = 0; i < 128; ++i)
{
tx.vout[0].nValue -= LOWFEE;
hash = tx.GetHash();
bool spendsCoinbase = (i == 0) ? true : false; // only first tx spends coinbase
mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(spendsCoinbase).FromTx(tx));
tx.vin[0].prevout.hash = hash;
}
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
mempool.clear();
// orphan in mempool, template creation fails
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).FromTx(tx));
BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
mempool.clear();
// child with higher priority than parent
tx.vin[0].scriptSig = CScript() << OP_1;
tx.vin[0].prevout.hash = txFirst[1]->GetHash();
tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
tx.vin[0].prevout.hash = hash;
tx.vin.resize(2);
tx.vin[1].scriptSig = CScript() << OP_1;
tx.vin[1].prevout.hash = txFirst[0]->GetHash();
tx.vin[1].prevout.n = 0;
tx.vout[0].nValue = tx.vout[0].nValue+BLOCKSUBSIDY-HIGHERFEE; //First txn output + fresh coinbase - new txn fee
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(HIGHERFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
mempool.clear();
// coinbase in mempool, template creation fails
tx.vin.resize(1);
tx.vin[0].prevout.SetNull();
tx.vin[0].scriptSig = CScript() << OP_0 << OP_1;
tx.vout[0].nValue = 0;
hash = tx.GetHash();
// give it a fee so it'll get mined
mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
mempool.clear();
// invalid (pre-p2sh) txn in mempool, template creation fails
tx.vin[0].prevout.hash = txFirst[0]->GetHash();
tx.vin[0].prevout.n = 0;
tx.vin[0].scriptSig = CScript() << OP_1;
tx.vout[0].nValue = BLOCKSUBSIDY-LOWFEE;
script = CScript() << OP_0;
tx.vout[0].scriptPubKey = GetScriptForDestination(CScriptID(script));
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
tx.vin[0].prevout.hash = hash;
tx.vin[0].scriptSig = CScript() << std::vector<unsigned char>(script.begin(), script.end());
tx.vout[0].nValue -= LOWFEE;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(LOWFEE).Time(GetTime()).SpendsCoinbase(false).FromTx(tx));
BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
mempool.clear();
// double spend txn pair in mempool, template creation fails
tx.vin[0].prevout.hash = txFirst[0]->GetHash();
tx.vin[0].scriptSig = CScript() << OP_1;
tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
tx.vout[0].scriptPubKey = CScript() << OP_1;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
tx.vout[0].scriptPubKey = CScript() << OP_2;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
BOOST_CHECK_THROW(BlockAssembler(chainparams).CreateNewBlock(scriptPubKey), std::runtime_error);
mempool.clear();
// subsidy changing
int nHeight = chainActive.Height();
// Create an actual 209999-long block chain (without valid blocks).
while (chainActive.Tip()->nHeight < 209999) {
CBlockIndex* prev = chainActive.Tip();
CBlockIndex* next = new CBlockIndex();
next->phashBlock = new uint256(GetRandHash());
pcoinsTip->SetBestBlock(next->GetBlockHash());
next->pprev = prev;
next->nHeight = prev->nHeight + 1;
next->BuildSkip();
chainActive.SetTip(next);
}
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
// Extend to a 210000-long block chain.
while (chainActive.Tip()->nHeight < 210000) {
CBlockIndex* prev = chainActive.Tip();
CBlockIndex* next = new CBlockIndex();
next->phashBlock = new uint256(GetRandHash());
pcoinsTip->SetBestBlock(next->GetBlockHash());
next->pprev = prev;
next->nHeight = prev->nHeight + 1;
next->BuildSkip();
chainActive.SetTip(next);
}
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
// Delete the dummy blocks again.
while (chainActive.Tip()->nHeight > nHeight) {
CBlockIndex* del = chainActive.Tip();
chainActive.SetTip(del->pprev);
pcoinsTip->SetBestBlock(del->pprev->GetBlockHash());
delete del->phashBlock;
delete del;
}
// non-final txs in mempool
SetMockTime(chainActive.Tip()->GetMedianTimePast()+1);
int flags = LOCKTIME_VERIFY_SEQUENCE|LOCKTIME_MEDIAN_TIME_PAST;
// height map
std::vector<int> prevheights;
// relative height locked
tx.nVersion = 2;
tx.vin.resize(1);
prevheights.resize(1);
tx.vin[0].prevout.hash = txFirst[0]->GetHash(); // only 1 transaction
tx.vin[0].prevout.n = 0;
tx.vin[0].scriptSig = CScript() << OP_1;
tx.vin[0].nSequence = chainActive.Tip()->nHeight + 1; // txFirst[0] is the 2nd block
prevheights[0] = baseheight + 1;
tx.vout.resize(1);
tx.vout[0].nValue = BLOCKSUBSIDY-HIGHFEE;
tx.vout[0].scriptPubKey = CScript() << OP_1;
tx.nLockTime = 0;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
BOOST_CHECK(SequenceLocks(tx, flags, &prevheights, CreateBlockIndex(chainActive.Tip()->nHeight + 2))); // Sequence locks pass on 2nd block
// relative time locked
tx.vin[0].prevout.hash = txFirst[1]->GetHash();
tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | (((chainActive.Tip()->GetMedianTimePast()+1-chainActive[1]->GetMedianTimePast()) >> CTxIn::SEQUENCE_LOCKTIME_GRANULARITY) + 1); // txFirst[1] is the 3rd block
prevheights[0] = baseheight + 2;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
BOOST_CHECK(SequenceLocks(tx, flags, &prevheights, CreateBlockIndex(chainActive.Tip()->nHeight + 1))); // Sequence locks pass 512 seconds later
for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime -= 512; //undo tricked MTP
// absolute height locked
tx.vin[0].prevout.hash = txFirst[2]->GetHash();
tx.vin[0].nSequence = CTxIn::SEQUENCE_FINAL - 1;
prevheights[0] = baseheight + 3;
tx.nLockTime = chainActive.Tip()->nHeight + 1;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
BOOST_CHECK(IsFinalTx(tx, chainActive.Tip()->nHeight + 2, chainActive.Tip()->GetMedianTimePast())); // Locktime passes on 2nd block
// absolute time locked
tx.vin[0].prevout.hash = txFirst[3]->GetHash();
tx.nLockTime = chainActive.Tip()->GetMedianTimePast();
prevheights.resize(1);
prevheights[0] = baseheight + 4;
hash = tx.GetHash();
mempool.addUnchecked(hash, entry.Time(GetTime()).FromTx(tx));
BOOST_CHECK(!CheckFinalTx(tx, flags)); // Locktime fails
BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
BOOST_CHECK(IsFinalTx(tx, chainActive.Tip()->nHeight + 2, chainActive.Tip()->GetMedianTimePast() + 1)); // Locktime passes 1 second later
// mempool-dependent transactions (not added)
tx.vin[0].prevout.hash = hash;
prevheights[0] = chainActive.Tip()->nHeight + 1;
tx.nLockTime = 0;
tx.vin[0].nSequence = 0;
BOOST_CHECK(CheckFinalTx(tx, flags)); // Locktime passes
BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
tx.vin[0].nSequence = 1;
BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG;
BOOST_CHECK(TestSequenceLocks(tx, flags)); // Sequence locks pass
tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | 1;
BOOST_CHECK(!TestSequenceLocks(tx, flags)); // Sequence locks fail
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
// None of the of the absolute height/time locked tx should have made
// it into the template because we still check IsFinalTx in CreateNewBlock,
// but relative locked txs will if inconsistently added to mempool.
// For now these will still generate a valid template until BIP68 soft fork
BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 3);
// However if we advance height by 1 and time by 512, all of them should be mined
for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
chainActive.Tip()->GetAncestor(chainActive.Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
chainActive.Tip()->nHeight++;
SetMockTime(chainActive.Tip()->GetMedianTimePast() + 1);
BOOST_CHECK(pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey));
BOOST_CHECK_EQUAL(pblocktemplate->block.vtx.size(), 5);
chainActive.Tip()->nHeight--;
SetMockTime(0);
mempool.clear();
TestPackageSelection(chainparams, scriptPubKey, txFirst);
BOOST_FOREACH(CTransaction *_tx, txFirst)
delete _tx;
fCheckpointsEnabled = true;
}
BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/policyestimator_tests.cpp b/src/test/policyestimator_tests.cpp
index 5c902387f..f57c24270 100644
--- a/src/test/policyestimator_tests.cpp
+++ b/src/test/policyestimator_tests.cpp
@@ -1,211 +1,210 @@
// Copyright (c) 2011-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "policy/policy.h"
#include "policy/fees.h"
#include "txmempool.h"
#include "uint256.h"
#include "util.h"
#include "test/test_bitcoin.h"
#include <boost/test/unit_test.hpp>
BOOST_FIXTURE_TEST_SUITE(policyestimator_tests, BasicTestingSetup)
BOOST_AUTO_TEST_CASE(BlockPolicyEstimates)
{
CTxMemPool mpool(CFeeRate(1000));
TestMemPoolEntryHelper entry;
CAmount basefee(2000);
double basepri = 1e6;
CAmount deltaFee(100);
double deltaPri=5e5;
std::vector<CAmount> feeV[2];
std::vector<double> priV[2];
// Populate vectors of increasing fees or priorities
for (int j = 0; j < 10; j++) {
//V[0] is for fee transactions
feeV[0].push_back(basefee * (j+1));
priV[0].push_back(0);
//V[1] is for priority transactions
feeV[1].push_back(CAmount(0));
priV[1].push_back(basepri * pow(10, j+1));
}
// Store the hashes of transactions that have been
// added to the mempool by their associate fee/pri
// txHashes[j] is populated with transactions either of
// fee = basefee * (j+1) OR pri = 10^6 * 10^(j+1)
std::vector<uint256> txHashes[10];
// Create a transaction template
CScript garbage;
for (unsigned int i = 0; i < 128; i++)
garbage.push_back('X');
CMutableTransaction tx;
- std::list<CTransaction> dummyConflicted;
tx.vin.resize(1);
tx.vin[0].scriptSig = garbage;
tx.vout.resize(1);
tx.vout[0].nValue=0LL;
CFeeRate baseRate(basefee, GetVirtualTransactionSize(tx));
// Create a fake block
std::vector<CTransaction> block;
int blocknum = 0;
// Loop through 200 blocks
// At a decay .998 and 4 fee transactions per block
// This makes the tx count about 1.33 per bucket, above the 1 threshold
while (blocknum < 200) {
for (int j = 0; j < 10; j++) { // For each fee/pri multiple
for (int k = 0; k < 5; k++) { // add 4 fee txs for every priority tx
tx.vin[0].prevout.n = 10000*blocknum+100*j+k; // make transaction unique
uint256 hash = tx.GetHash();
mpool.addUnchecked(hash, entry.Fee(feeV[k/4][j]).Time(GetTime()).Priority(priV[k/4][j]).Height(blocknum).FromTx(tx, &mpool));
txHashes[j].push_back(hash);
}
}
//Create blocks where higher fee/pri txs are included more often
for (int h = 0; h <= blocknum%10; h++) {
// 10/10 blocks add highest fee/pri transactions
// 9/10 blocks add 2nd highest and so on until ...
// 1/10 blocks add lowest fee/pri transactions
while (txHashes[9-h].size()) {
std::shared_ptr<const CTransaction> ptx = mpool.get(txHashes[9-h].back());
if (ptx)
block.push_back(*ptx);
txHashes[9-h].pop_back();
}
}
- mpool.removeForBlock(block, ++blocknum, dummyConflicted);
+ mpool.removeForBlock(block, ++blocknum);
block.clear();
if (blocknum == 30) {
// At this point we should need to combine 5 buckets to get enough data points
// So estimateFee(1,2,3) should fail and estimateFee(4) should return somewhere around
// 8*baserate. estimateFee(4) %'s are 100,100,100,100,90 = average 98%
BOOST_CHECK(mpool.estimateFee(1) == CFeeRate(0));
BOOST_CHECK(mpool.estimateFee(2) == CFeeRate(0));
BOOST_CHECK(mpool.estimateFee(3) == CFeeRate(0));
BOOST_CHECK(mpool.estimateFee(4).GetFeePerK() < 8*baseRate.GetFeePerK() + deltaFee);
BOOST_CHECK(mpool.estimateFee(4).GetFeePerK() > 8*baseRate.GetFeePerK() - deltaFee);
int answerFound;
BOOST_CHECK(mpool.estimateSmartFee(1, &answerFound) == mpool.estimateFee(4) && answerFound == 4);
BOOST_CHECK(mpool.estimateSmartFee(3, &answerFound) == mpool.estimateFee(4) && answerFound == 4);
BOOST_CHECK(mpool.estimateSmartFee(4, &answerFound) == mpool.estimateFee(4) && answerFound == 4);
BOOST_CHECK(mpool.estimateSmartFee(8, &answerFound) == mpool.estimateFee(8) && answerFound == 8);
}
}
std::vector<CAmount> origFeeEst;
std::vector<double> origPriEst;
// Highest feerate is 10*baseRate and gets in all blocks,
// second highest feerate is 9*baseRate and gets in 9/10 blocks = 90%,
// third highest feerate is 8*base rate, and gets in 8/10 blocks = 80%,
// so estimateFee(1) should return 10*baseRate.
// Second highest feerate has 100% chance of being included by 2 blocks,
// so estimateFee(2) should return 9*baseRate etc...
for (int i = 1; i < 10;i++) {
origFeeEst.push_back(mpool.estimateFee(i).GetFeePerK());
origPriEst.push_back(mpool.estimatePriority(i));
if (i > 1) { // Fee estimates should be monotonically decreasing
BOOST_CHECK(origFeeEst[i-1] <= origFeeEst[i-2]);
BOOST_CHECK(origPriEst[i-1] <= origPriEst[i-2]);
}
int mult = 11-i;
BOOST_CHECK(origFeeEst[i-1] < mult*baseRate.GetFeePerK() + deltaFee);
BOOST_CHECK(origFeeEst[i-1] > mult*baseRate.GetFeePerK() - deltaFee);
BOOST_CHECK(origPriEst[i-1] < pow(10,mult) * basepri + deltaPri);
BOOST_CHECK(origPriEst[i-1] > pow(10,mult) * basepri - deltaPri);
}
// Mine 50 more blocks with no transactions happening, estimates shouldn't change
// We haven't decayed the moving average enough so we still have enough data points in every bucket
while (blocknum < 250)
- mpool.removeForBlock(block, ++blocknum, dummyConflicted);
+ mpool.removeForBlock(block, ++blocknum);
for (int i = 1; i < 10;i++) {
BOOST_CHECK(mpool.estimateFee(i).GetFeePerK() < origFeeEst[i-1] + deltaFee);
BOOST_CHECK(mpool.estimateFee(i).GetFeePerK() > origFeeEst[i-1] - deltaFee);
BOOST_CHECK(mpool.estimatePriority(i) < origPriEst[i-1] + deltaPri);
BOOST_CHECK(mpool.estimatePriority(i) > origPriEst[i-1] - deltaPri);
}
// Mine 15 more blocks with lots of transactions happening and not getting mined
// Estimates should go up
while (blocknum < 265) {
for (int j = 0; j < 10; j++) { // For each fee/pri multiple
for (int k = 0; k < 5; k++) { // add 4 fee txs for every priority tx
tx.vin[0].prevout.n = 10000*blocknum+100*j+k;
uint256 hash = tx.GetHash();
mpool.addUnchecked(hash, entry.Fee(feeV[k/4][j]).Time(GetTime()).Priority(priV[k/4][j]).Height(blocknum).FromTx(tx, &mpool));
txHashes[j].push_back(hash);
}
}
- mpool.removeForBlock(block, ++blocknum, dummyConflicted);
+ mpool.removeForBlock(block, ++blocknum);
}
int answerFound;
for (int i = 1; i < 10;i++) {
BOOST_CHECK(mpool.estimateFee(i) == CFeeRate(0) || mpool.estimateFee(i).GetFeePerK() > origFeeEst[i-1] - deltaFee);
BOOST_CHECK(mpool.estimateSmartFee(i, &answerFound).GetFeePerK() > origFeeEst[answerFound-1] - deltaFee);
BOOST_CHECK(mpool.estimatePriority(i) == -1 || mpool.estimatePriority(i) > origPriEst[i-1] - deltaPri);
BOOST_CHECK(mpool.estimateSmartPriority(i, &answerFound) > origPriEst[answerFound-1] - deltaPri);
}
// Mine all those transactions
// Estimates should still not be below original
for (int j = 0; j < 10; j++) {
while(txHashes[j].size()) {
std::shared_ptr<const CTransaction> ptx = mpool.get(txHashes[j].back());
if (ptx)
block.push_back(*ptx);
txHashes[j].pop_back();
}
}
- mpool.removeForBlock(block, 265, dummyConflicted);
+ mpool.removeForBlock(block, 265);
block.clear();
for (int i = 1; i < 10;i++) {
BOOST_CHECK(mpool.estimateFee(i).GetFeePerK() > origFeeEst[i-1] - deltaFee);
BOOST_CHECK(mpool.estimatePriority(i) > origPriEst[i-1] - deltaPri);
}
// Mine 200 more blocks where everything is mined every block
// Estimates should be below original estimates
while (blocknum < 465) {
for (int j = 0; j < 10; j++) { // For each fee/pri multiple
for (int k = 0; k < 5; k++) { // add 4 fee txs for every priority tx
tx.vin[0].prevout.n = 10000*blocknum+100*j+k;
uint256 hash = tx.GetHash();
mpool.addUnchecked(hash, entry.Fee(feeV[k/4][j]).Time(GetTime()).Priority(priV[k/4][j]).Height(blocknum).FromTx(tx, &mpool));
std::shared_ptr<const CTransaction> ptx = mpool.get(hash);
if (ptx)
block.push_back(*ptx);
}
}
- mpool.removeForBlock(block, ++blocknum, dummyConflicted);
+ mpool.removeForBlock(block, ++blocknum);
block.clear();
}
for (int i = 1; i < 10; i++) {
BOOST_CHECK(mpool.estimateFee(i).GetFeePerK() < origFeeEst[i-1] - deltaFee);
BOOST_CHECK(mpool.estimatePriority(i) < origPriEst[i-1] - deltaPri);
}
// Test that if the mempool is limited, estimateSmartFee won't return a value below the mempool min fee
// and that estimateSmartPriority returns essentially an infinite value
mpool.addUnchecked(tx.GetHash(), entry.Fee(feeV[0][5]).Time(GetTime()).Priority(priV[1][5]).Height(blocknum).FromTx(tx, &mpool));
// evict that transaction which should set a mempool min fee of minRelayTxFee + feeV[0][5]
mpool.TrimToSize(1);
BOOST_CHECK(mpool.GetMinFee(1).GetFeePerK() > feeV[0][5]);
for (int i = 1; i < 10; i++) {
BOOST_CHECK(mpool.estimateSmartFee(i).GetFeePerK() >= mpool.estimateFee(i).GetFeePerK());
BOOST_CHECK(mpool.estimateSmartFee(i).GetFeePerK() >= mpool.GetMinFee(1).GetFeePerK());
BOOST_CHECK(mpool.estimateSmartPriority(i) == INF_PRIORITY);
}
}
BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 9816c9dcb..193542ee5 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -1,1139 +1,1141 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "txmempool.h"
#include "clientversion.h"
#include "consensus/consensus.h"
#include "consensus/validation.h"
#include "main.h"
#include "policy/policy.h"
#include "policy/fees.h"
#include "streams.h"
#include "timedata.h"
#include "util.h"
#include "utilmoneystr.h"
#include "utiltime.h"
#include "version.h"
using namespace std;
CTxMemPoolEntry::CTxMemPoolEntry(const CTransaction& _tx, const CAmount& _nFee,
int64_t _nTime, double _entryPriority, unsigned int _entryHeight,
bool poolHasNoInputsOf, CAmount _inChainInputValue,
bool _spendsCoinbase, int64_t _sigOpsCost, LockPoints lp):
tx(std::make_shared<CTransaction>(_tx)), nFee(_nFee), nTime(_nTime), entryPriority(_entryPriority), entryHeight(_entryHeight),
hadNoDependencies(poolHasNoInputsOf), inChainInputValue(_inChainInputValue),
spendsCoinbase(_spendsCoinbase), sigOpCost(_sigOpsCost), lockPoints(lp)
{
nTxWeight = GetTransactionWeight(_tx);
nModSize = _tx.CalculateModifiedSize(GetTxSize());
nUsageSize = RecursiveDynamicUsage(*tx) + memusage::DynamicUsage(tx);
nCountWithDescendants = 1;
nSizeWithDescendants = GetTxSize();
nModFeesWithDescendants = nFee;
CAmount nValueIn = _tx.GetValueOut()+nFee;
assert(inChainInputValue <= nValueIn);
feeDelta = 0;
nCountWithAncestors = 1;
nSizeWithAncestors = GetTxSize();
nModFeesWithAncestors = nFee;
nSigOpCostWithAncestors = sigOpCost;
}
CTxMemPoolEntry::CTxMemPoolEntry(const CTxMemPoolEntry& other)
{
*this = other;
}
double
CTxMemPoolEntry::GetPriority(unsigned int currentHeight) const
{
double deltaPriority = ((double)(currentHeight-entryHeight)*inChainInputValue)/nModSize;
double dResult = entryPriority + deltaPriority;
if (dResult < 0) // This should only happen if it was called with a height below entry height
dResult = 0;
return dResult;
}
void CTxMemPoolEntry::UpdateFeeDelta(int64_t newFeeDelta)
{
nModFeesWithDescendants += newFeeDelta - feeDelta;
nModFeesWithAncestors += newFeeDelta - feeDelta;
feeDelta = newFeeDelta;
}
void CTxMemPoolEntry::UpdateLockPoints(const LockPoints& lp)
{
lockPoints = lp;
}
size_t CTxMemPoolEntry::GetTxSize() const
{
return GetVirtualTransactionSize(nTxWeight, sigOpCost);
}
// Update the given tx for any in-mempool descendants.
// Assumes that setMemPoolChildren is correct for the given tx and all
// descendants.
void CTxMemPool::UpdateForDescendants(txiter updateIt, cacheMap &cachedDescendants, const std::set<uint256> &setExclude)
{
setEntries stageEntries, setAllDescendants;
stageEntries = GetMemPoolChildren(updateIt);
while (!stageEntries.empty()) {
const txiter cit = *stageEntries.begin();
setAllDescendants.insert(cit);
stageEntries.erase(cit);
const setEntries &setChildren = GetMemPoolChildren(cit);
BOOST_FOREACH(const txiter childEntry, setChildren) {
cacheMap::iterator cacheIt = cachedDescendants.find(childEntry);
if (cacheIt != cachedDescendants.end()) {
// We've already calculated this one, just add the entries for this set
// but don't traverse again.
BOOST_FOREACH(const txiter cacheEntry, cacheIt->second) {
setAllDescendants.insert(cacheEntry);
}
} else if (!setAllDescendants.count(childEntry)) {
// Schedule for later processing
stageEntries.insert(childEntry);
}
}
}
// setAllDescendants now contains all in-mempool descendants of updateIt.
// Update and add to cached descendant map
int64_t modifySize = 0;
CAmount modifyFee = 0;
int64_t modifyCount = 0;
BOOST_FOREACH(txiter cit, setAllDescendants) {
if (!setExclude.count(cit->GetTx().GetHash())) {
modifySize += cit->GetTxSize();
modifyFee += cit->GetModifiedFee();
modifyCount++;
cachedDescendants[updateIt].insert(cit);
// Update ancestor state for each descendant
mapTx.modify(cit, update_ancestor_state(updateIt->GetTxSize(), updateIt->GetModifiedFee(), 1, updateIt->GetSigOpCost()));
}
}
mapTx.modify(updateIt, update_descendant_state(modifySize, modifyFee, modifyCount));
}
// vHashesToUpdate is the set of transaction hashes from a disconnected block
// which has been re-added to the mempool.
// for each entry, look for descendants that are outside hashesToUpdate, and
// add fee/size information for such descendants to the parent.
// for each such descendant, also update the ancestor state to include the parent.
void CTxMemPool::UpdateTransactionsFromBlock(const std::vector<uint256> &vHashesToUpdate)
{
LOCK(cs);
// For each entry in vHashesToUpdate, store the set of in-mempool, but not
// in-vHashesToUpdate transactions, so that we don't have to recalculate
// descendants when we come across a previously seen entry.
cacheMap mapMemPoolDescendantsToUpdate;
// Use a set for lookups into vHashesToUpdate (these entries are already
// accounted for in the state of their ancestors)
std::set<uint256> setAlreadyIncluded(vHashesToUpdate.begin(), vHashesToUpdate.end());
// Iterate in reverse, so that whenever we are looking at at a transaction
// we are sure that all in-mempool descendants have already been processed.
// This maximizes the benefit of the descendant cache and guarantees that
// setMemPoolChildren will be updated, an assumption made in
// UpdateForDescendants.
BOOST_REVERSE_FOREACH(const uint256 &hash, vHashesToUpdate) {
// we cache the in-mempool children to avoid duplicate updates
setEntries setChildren;
// calculate children from mapNextTx
txiter it = mapTx.find(hash);
if (it == mapTx.end()) {
continue;
}
auto iter = mapNextTx.lower_bound(COutPoint(hash, 0));
// First calculate the children, and update setMemPoolChildren to
// include them, and update their setMemPoolParents to include this tx.
for (; iter != mapNextTx.end() && iter->first->hash == hash; ++iter) {
const uint256 &childHash = iter->second->GetHash();
txiter childIter = mapTx.find(childHash);
assert(childIter != mapTx.end());
// We can skip updating entries we've encountered before or that
// are in the block (which are already accounted for).
if (setChildren.insert(childIter).second && !setAlreadyIncluded.count(childHash)) {
UpdateChild(it, childIter, true);
UpdateParent(childIter, it, true);
}
}
UpdateForDescendants(it, mapMemPoolDescendantsToUpdate, setAlreadyIncluded);
}
}
bool CTxMemPool::CalculateMemPoolAncestors(const CTxMemPoolEntry &entry, setEntries &setAncestors, uint64_t limitAncestorCount, uint64_t limitAncestorSize, uint64_t limitDescendantCount, uint64_t limitDescendantSize, std::string &errString, bool fSearchForParents /* = true */) const
{
setEntries parentHashes;
const CTransaction &tx = entry.GetTx();
if (fSearchForParents) {
// Get parents of this transaction that are in the mempool
// GetMemPoolParents() is only valid for entries in the mempool, so we
// iterate mapTx to find parents.
for (unsigned int i = 0; i < tx.vin.size(); i++) {
txiter piter = mapTx.find(tx.vin[i].prevout.hash);
if (piter != mapTx.end()) {
parentHashes.insert(piter);
if (parentHashes.size() + 1 > limitAncestorCount) {
errString = strprintf("too many unconfirmed parents [limit: %u]", limitAncestorCount);
return false;
}
}
}
} else {
// If we're not searching for parents, we require this to be an
// entry in the mempool already.
txiter it = mapTx.iterator_to(entry);
parentHashes = GetMemPoolParents(it);
}
size_t totalSizeWithAncestors = entry.GetTxSize();
while (!parentHashes.empty()) {
txiter stageit = *parentHashes.begin();
setAncestors.insert(stageit);
parentHashes.erase(stageit);
totalSizeWithAncestors += stageit->GetTxSize();
if (stageit->GetSizeWithDescendants() + entry.GetTxSize() > limitDescendantSize) {
errString = strprintf("exceeds descendant size limit for tx %s [limit: %u]", stageit->GetTx().GetHash().ToString(), limitDescendantSize);
return false;
} else if (stageit->GetCountWithDescendants() + 1 > limitDescendantCount) {
errString = strprintf("too many descendants for tx %s [limit: %u]", stageit->GetTx().GetHash().ToString(), limitDescendantCount);
return false;
} else if (totalSizeWithAncestors > limitAncestorSize) {
errString = strprintf("exceeds ancestor size limit [limit: %u]", limitAncestorSize);
return false;
}
const setEntries & setMemPoolParents = GetMemPoolParents(stageit);
BOOST_FOREACH(const txiter &phash, setMemPoolParents) {
// If this is a new ancestor, add it.
if (setAncestors.count(phash) == 0) {
parentHashes.insert(phash);
}
if (parentHashes.size() + setAncestors.size() + 1 > limitAncestorCount) {
errString = strprintf("too many unconfirmed ancestors [limit: %u]", limitAncestorCount);
return false;
}
}
}
return true;
}
void CTxMemPool::UpdateAncestorsOf(bool add, txiter it, setEntries &setAncestors)
{
setEntries parentIters = GetMemPoolParents(it);
// add or remove this tx as a child of each parent
BOOST_FOREACH(txiter piter, parentIters) {
UpdateChild(piter, it, add);
}
const int64_t updateCount = (add ? 1 : -1);
const int64_t updateSize = updateCount * it->GetTxSize();
const CAmount updateFee = updateCount * it->GetModifiedFee();
BOOST_FOREACH(txiter ancestorIt, setAncestors) {
mapTx.modify(ancestorIt, update_descendant_state(updateSize, updateFee, updateCount));
}
}
void CTxMemPool::UpdateEntryForAncestors(txiter it, const setEntries &setAncestors)
{
int64_t updateCount = setAncestors.size();
int64_t updateSize = 0;
CAmount updateFee = 0;
int64_t updateSigOpsCost = 0;
BOOST_FOREACH(txiter ancestorIt, setAncestors) {
updateSize += ancestorIt->GetTxSize();
updateFee += ancestorIt->GetModifiedFee();
updateSigOpsCost += ancestorIt->GetSigOpCost();
}
mapTx.modify(it, update_ancestor_state(updateSize, updateFee, updateCount, updateSigOpsCost));
}
void CTxMemPool::UpdateChildrenForRemoval(txiter it)
{
const setEntries &setMemPoolChildren = GetMemPoolChildren(it);
BOOST_FOREACH(txiter updateIt, setMemPoolChildren) {
UpdateParent(updateIt, it, false);
}
}
void CTxMemPool::UpdateForRemoveFromMempool(const setEntries &entriesToRemove, bool updateDescendants)
{
// For each entry, walk back all ancestors and decrement size associated with this
// transaction
const uint64_t nNoLimit = std::numeric_limits<uint64_t>::max();
if (updateDescendants) {
// updateDescendants should be true whenever we're not recursively
// removing a tx and all its descendants, eg when a transaction is
// confirmed in a block.
// Here we only update statistics and not data in mapLinks (which
// we need to preserve until we're finished with all operations that
// need to traverse the mempool).
BOOST_FOREACH(txiter removeIt, entriesToRemove) {
setEntries setDescendants;
CalculateDescendants(removeIt, setDescendants);
setDescendants.erase(removeIt); // don't update state for self
int64_t modifySize = -((int64_t)removeIt->GetTxSize());
CAmount modifyFee = -removeIt->GetModifiedFee();
int modifySigOps = -removeIt->GetSigOpCost();
BOOST_FOREACH(txiter dit, setDescendants) {
mapTx.modify(dit, update_ancestor_state(modifySize, modifyFee, -1, modifySigOps));
}
}
}
BOOST_FOREACH(txiter removeIt, entriesToRemove) {
setEntries setAncestors;
const CTxMemPoolEntry &entry = *removeIt;
std::string dummy;
// Since this is a tx that is already in the mempool, we can call CMPA
// with fSearchForParents = false. If the mempool is in a consistent
// state, then using true or false should both be correct, though false
// should be a bit faster.
// However, if we happen to be in the middle of processing a reorg, then
// the mempool can be in an inconsistent state. In this case, the set
// of ancestors reachable via mapLinks will be the same as the set of
// ancestors whose packages include this transaction, because when we
// add a new transaction to the mempool in addUnchecked(), we assume it
// has no children, and in the case of a reorg where that assumption is
// false, the in-mempool children aren't linked to the in-block tx's
// until UpdateTransactionsFromBlock() is called.
// So if we're being called during a reorg, ie before
// UpdateTransactionsFromBlock() has been called, then mapLinks[] will
// differ from the set of mempool parents we'd calculate by searching,
// and it's important that we use the mapLinks[] notion of ancestor
// transactions as the set of things to update for removal.
CalculateMemPoolAncestors(entry, setAncestors, nNoLimit, nNoLimit, nNoLimit, nNoLimit, dummy, false);
// Note that UpdateAncestorsOf severs the child links that point to
// removeIt in the entries for the parents of removeIt.
UpdateAncestorsOf(false, removeIt, setAncestors);
}
// After updating all the ancestor sizes, we can now sever the link between each
// transaction being removed and any mempool children (ie, update setMemPoolParents
// for each direct child of a transaction being removed).
BOOST_FOREACH(txiter removeIt, entriesToRemove) {
UpdateChildrenForRemoval(removeIt);
}
}
void CTxMemPoolEntry::UpdateDescendantState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount)
{
nSizeWithDescendants += modifySize;
assert(int64_t(nSizeWithDescendants) > 0);
nModFeesWithDescendants += modifyFee;
nCountWithDescendants += modifyCount;
assert(int64_t(nCountWithDescendants) > 0);
}
void CTxMemPoolEntry::UpdateAncestorState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount, int modifySigOps)
{
nSizeWithAncestors += modifySize;
assert(int64_t(nSizeWithAncestors) > 0);
nModFeesWithAncestors += modifyFee;
nCountWithAncestors += modifyCount;
assert(int64_t(nCountWithAncestors) > 0);
nSigOpCostWithAncestors += modifySigOps;
assert(int(nSigOpCostWithAncestors) >= 0);
}
CTxMemPool::CTxMemPool(const CFeeRate& _minReasonableRelayFee) :
nTransactionsUpdated(0)
{
_clear(); //lock free clear
// Sanity checks off by default for performance, because otherwise
// accepting transactions becomes O(N^2) where N is the number
// of transactions in the pool
nCheckFrequency = 0;
minerPolicyEstimator = new CBlockPolicyEstimator(_minReasonableRelayFee);
minReasonableRelayFee = _minReasonableRelayFee;
}
CTxMemPool::~CTxMemPool()
{
delete minerPolicyEstimator;
}
void CTxMemPool::pruneSpent(const uint256 &hashTx, CCoins &coins)
{
LOCK(cs);
auto it = mapNextTx.lower_bound(COutPoint(hashTx, 0));
// iterate over all COutPoints in mapNextTx whose hash equals the provided hashTx
while (it != mapNextTx.end() && it->first->hash == hashTx) {
coins.Spend(it->first->n); // and remove those outputs from coins
it++;
}
}
unsigned int CTxMemPool::GetTransactionsUpdated() const
{
LOCK(cs);
return nTransactionsUpdated;
}
void CTxMemPool::AddTransactionsUpdated(unsigned int n)
{
LOCK(cs);
nTransactionsUpdated += n;
}
bool CTxMemPool::addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry, setEntries &setAncestors, bool fCurrentEstimate)
{
// Add to memory pool without checking anything.
// Used by main.cpp AcceptToMemoryPool(), which DOES do
// all the appropriate checks.
LOCK(cs);
indexed_transaction_set::iterator newit = mapTx.insert(entry).first;
mapLinks.insert(make_pair(newit, TxLinks()));
// Update transaction for any feeDelta created by PrioritiseTransaction
// TODO: refactor so that the fee delta is calculated before inserting
// into mapTx.
std::map<uint256, std::pair<double, CAmount> >::const_iterator pos = mapDeltas.find(hash);
if (pos != mapDeltas.end()) {
const std::pair<double, CAmount> &deltas = pos->second;
if (deltas.second) {
mapTx.modify(newit, update_fee_delta(deltas.second));
}
}
// Update cachedInnerUsage to include contained transaction's usage.
// (When we update the entry for in-mempool parents, memory usage will be
// further updated.)
cachedInnerUsage += entry.DynamicMemoryUsage();
const CTransaction& tx = newit->GetTx();
std::set<uint256> setParentTransactions;
for (unsigned int i = 0; i < tx.vin.size(); i++) {
mapNextTx.insert(std::make_pair(&tx.vin[i].prevout, &tx));
setParentTransactions.insert(tx.vin[i].prevout.hash);
}
// Don't bother worrying about child transactions of this one.
// Normal case of a new transaction arriving is that there can't be any
// children, because such children would be orphans.
// An exception to that is if a transaction enters that used to be in a block.
// In that case, our disconnect block logic will call UpdateTransactionsFromBlock
// to clean up the mess we're leaving here.
// Update ancestors with information about this tx
BOOST_FOREACH (const uint256 &phash, setParentTransactions) {
txiter pit = mapTx.find(phash);
if (pit != mapTx.end()) {
UpdateParent(newit, pit, true);
}
}
UpdateAncestorsOf(true, newit, setAncestors);
UpdateEntryForAncestors(newit, setAncestors);
nTransactionsUpdated++;
totalTxSize += entry.GetTxSize();
minerPolicyEstimator->processTransaction(entry, fCurrentEstimate);
vTxHashes.emplace_back(tx.GetWitnessHash(), newit);
newit->vTxHashesIdx = vTxHashes.size() - 1;
return true;
}
void CTxMemPool::removeUnchecked(txiter it)
{
const uint256 hash = it->GetTx().GetHash();
BOOST_FOREACH(const CTxIn& txin, it->GetTx().vin)
mapNextTx.erase(txin.prevout);
if (vTxHashes.size() > 1) {
vTxHashes[it->vTxHashesIdx] = std::move(vTxHashes.back());
vTxHashes[it->vTxHashesIdx].second->vTxHashesIdx = it->vTxHashesIdx;
vTxHashes.pop_back();
if (vTxHashes.size() * 2 < vTxHashes.capacity())
vTxHashes.shrink_to_fit();
} else
vTxHashes.clear();
totalTxSize -= it->GetTxSize();
cachedInnerUsage -= it->DynamicMemoryUsage();
cachedInnerUsage -= memusage::DynamicUsage(mapLinks[it].parents) + memusage::DynamicUsage(mapLinks[it].children);
mapLinks.erase(it);
mapTx.erase(it);
nTransactionsUpdated++;
minerPolicyEstimator->removeTx(hash);
}
// Calculates descendants of entry that are not already in setDescendants, and adds to
// setDescendants. Assumes entryit is already a tx in the mempool and setMemPoolChildren
// is correct for tx and all descendants.
// Also assumes that if an entry is in setDescendants already, then all
// in-mempool descendants of it are already in setDescendants as well, so that we
// can save time by not iterating over those entries.
void CTxMemPool::CalculateDescendants(txiter entryit, setEntries &setDescendants)
{
setEntries stage;
if (setDescendants.count(entryit) == 0) {
stage.insert(entryit);
}
// Traverse down the children of entry, only adding children that are not
// accounted for in setDescendants already (because those children have either
// already been walked, or will be walked in this iteration).
while (!stage.empty()) {
txiter it = *stage.begin();
setDescendants.insert(it);
stage.erase(it);
const setEntries &setChildren = GetMemPoolChildren(it);
BOOST_FOREACH(const txiter &childiter, setChildren) {
if (!setDescendants.count(childiter)) {
stage.insert(childiter);
}
}
}
}
-void CTxMemPool::removeRecursive(const CTransaction &origTx, std::list<CTransaction>& removed)
+void CTxMemPool::removeRecursive(const CTransaction &origTx, std::list<CTransaction>* removed)
{
// Remove transaction from memory pool
{
LOCK(cs);
setEntries txToRemove;
txiter origit = mapTx.find(origTx.GetHash());
if (origit != mapTx.end()) {
txToRemove.insert(origit);
} else {
// When recursively removing but origTx isn't in the mempool
// be sure to remove any children that are in the pool. This can
// happen during chain re-orgs if origTx isn't re-accepted into
// the mempool for any reason.
for (unsigned int i = 0; i < origTx.vout.size(); i++) {
auto it = mapNextTx.find(COutPoint(origTx.GetHash(), i));
if (it == mapNextTx.end())
continue;
txiter nextit = mapTx.find(it->second->GetHash());
assert(nextit != mapTx.end());
txToRemove.insert(nextit);
}
}
setEntries setAllRemoves;
BOOST_FOREACH(txiter it, txToRemove) {
CalculateDescendants(it, setAllRemoves);
}
- BOOST_FOREACH(txiter it, setAllRemoves) {
- removed.push_back(it->GetTx());
+ if (removed) {
+ BOOST_FOREACH(txiter it, setAllRemoves) {
+ removed->push_back(it->GetTx());
+ }
}
RemoveStaged(setAllRemoves, false);
}
}
void CTxMemPool::removeForReorg(const CCoinsViewCache *pcoins, unsigned int nMemPoolHeight, int flags)
{
// Remove transactions spending a coinbase which are now immature and no-longer-final transactions
LOCK(cs);
setEntries txToRemove;
for (indexed_transaction_set::const_iterator it = mapTx.begin(); it != mapTx.end(); it++) {
const CTransaction& tx = it->GetTx();
LockPoints lp = it->GetLockPoints();
bool validLP = TestLockPointValidity(&lp);
if (!CheckFinalTx(tx, flags) || !CheckSequenceLocks(tx, flags, &lp, validLP)) {
// Note if CheckSequenceLocks fails the LockPoints may still be invalid
// So it's critical that we remove the tx and not depend on the LockPoints.
txToRemove.insert(it);
} else if (it->GetSpendsCoinbase()) {
BOOST_FOREACH(const CTxIn& txin, tx.vin) {
indexed_transaction_set::const_iterator it2 = mapTx.find(txin.prevout.hash);
if (it2 != mapTx.end())
continue;
const CCoins *coins = pcoins->AccessCoins(txin.prevout.hash);
if (nCheckFrequency != 0) assert(coins);
if (!coins || (coins->IsCoinBase() && ((signed long)nMemPoolHeight) - coins->nHeight < COINBASE_MATURITY)) {
txToRemove.insert(it);
break;
}
}
}
if (!validLP) {
mapTx.modify(it, update_lock_points(lp));
}
}
setEntries setAllRemoves;
for (txiter it : txToRemove) {
CalculateDescendants(it, setAllRemoves);
}
RemoveStaged(setAllRemoves, false);
}
-void CTxMemPool::removeConflicts(const CTransaction &tx, std::list<CTransaction>& removed)
+void CTxMemPool::removeConflicts(const CTransaction &tx, std::list<CTransaction>* removed)
{
// Remove transactions which depend on inputs of tx, recursively
LOCK(cs);
BOOST_FOREACH(const CTxIn &txin, tx.vin) {
auto it = mapNextTx.find(txin.prevout);
if (it != mapNextTx.end()) {
const CTransaction &txConflict = *it->second;
if (txConflict != tx)
{
removeRecursive(txConflict, removed);
ClearPrioritisation(txConflict.GetHash());
}
}
}
}
/**
* Called when a block is connected. Removes from mempool and updates the miner fee estimator.
*/
void CTxMemPool::removeForBlock(const std::vector<CTransaction>& vtx, unsigned int nBlockHeight,
- std::list<CTransaction>& conflicts, bool fCurrentEstimate)
+ std::list<CTransaction>* conflicts, bool fCurrentEstimate)
{
LOCK(cs);
std::vector<CTxMemPoolEntry> entries;
BOOST_FOREACH(const CTransaction& tx, vtx)
{
uint256 hash = tx.GetHash();
indexed_transaction_set::iterator i = mapTx.find(hash);
if (i != mapTx.end())
entries.push_back(*i);
}
BOOST_FOREACH(const CTransaction& tx, vtx)
{
txiter it = mapTx.find(tx.GetHash());
if (it != mapTx.end()) {
setEntries stage;
stage.insert(it);
RemoveStaged(stage, true);
}
removeConflicts(tx, conflicts);
ClearPrioritisation(tx.GetHash());
}
// After the txs in the new block have been removed from the mempool, update policy estimates
minerPolicyEstimator->processBlock(nBlockHeight, entries, fCurrentEstimate);
lastRollingFeeUpdate = GetTime();
blockSinceLastRollingFeeBump = true;
}
void CTxMemPool::_clear()
{
mapLinks.clear();
mapTx.clear();
mapNextTx.clear();
totalTxSize = 0;
cachedInnerUsage = 0;
lastRollingFeeUpdate = GetTime();
blockSinceLastRollingFeeBump = false;
rollingMinimumFeeRate = 0;
++nTransactionsUpdated;
}
void CTxMemPool::clear()
{
LOCK(cs);
_clear();
}
void CTxMemPool::check(const CCoinsViewCache *pcoins) const
{
if (nCheckFrequency == 0)
return;
if (GetRand(std::numeric_limits<uint32_t>::max()) >= nCheckFrequency)
return;
LogPrint("mempool", "Checking mempool with %u transactions and %u inputs\n", (unsigned int)mapTx.size(), (unsigned int)mapNextTx.size());
uint64_t checkTotal = 0;
uint64_t innerUsage = 0;
CCoinsViewCache mempoolDuplicate(const_cast<CCoinsViewCache*>(pcoins));
const int64_t nSpendHeight = GetSpendHeight(mempoolDuplicate);
LOCK(cs);
list<const CTxMemPoolEntry*> waitingOnDependants;
for (indexed_transaction_set::const_iterator it = mapTx.begin(); it != mapTx.end(); it++) {
unsigned int i = 0;
checkTotal += it->GetTxSize();
innerUsage += it->DynamicMemoryUsage();
const CTransaction& tx = it->GetTx();
txlinksMap::const_iterator linksiter = mapLinks.find(it);
assert(linksiter != mapLinks.end());
const TxLinks &links = linksiter->second;
innerUsage += memusage::DynamicUsage(links.parents) + memusage::DynamicUsage(links.children);
bool fDependsWait = false;
setEntries setParentCheck;
int64_t parentSizes = 0;
int64_t parentSigOpCost = 0;
BOOST_FOREACH(const CTxIn &txin, tx.vin) {
// Check that every mempool transaction's inputs refer to available coins, or other mempool tx's.
indexed_transaction_set::const_iterator it2 = mapTx.find(txin.prevout.hash);
if (it2 != mapTx.end()) {
const CTransaction& tx2 = it2->GetTx();
assert(tx2.vout.size() > txin.prevout.n && !tx2.vout[txin.prevout.n].IsNull());
fDependsWait = true;
if (setParentCheck.insert(it2).second) {
parentSizes += it2->GetTxSize();
parentSigOpCost += it2->GetSigOpCost();
}
} else {
const CCoins* coins = pcoins->AccessCoins(txin.prevout.hash);
assert(coins && coins->IsAvailable(txin.prevout.n));
}
// Check whether its inputs are marked in mapNextTx.
auto it3 = mapNextTx.find(txin.prevout);
assert(it3 != mapNextTx.end());
assert(it3->first == &txin.prevout);
assert(it3->second == &tx);
i++;
}
assert(setParentCheck == GetMemPoolParents(it));
// Verify ancestor state is correct.
setEntries setAncestors;
uint64_t nNoLimit = std::numeric_limits<uint64_t>::max();
std::string dummy;
CalculateMemPoolAncestors(*it, setAncestors, nNoLimit, nNoLimit, nNoLimit, nNoLimit, dummy);
uint64_t nCountCheck = setAncestors.size() + 1;
uint64_t nSizeCheck = it->GetTxSize();
CAmount nFeesCheck = it->GetModifiedFee();
int64_t nSigOpCheck = it->GetSigOpCost();
BOOST_FOREACH(txiter ancestorIt, setAncestors) {
nSizeCheck += ancestorIt->GetTxSize();
nFeesCheck += ancestorIt->GetModifiedFee();
nSigOpCheck += ancestorIt->GetSigOpCost();
}
assert(it->GetCountWithAncestors() == nCountCheck);
assert(it->GetSizeWithAncestors() == nSizeCheck);
assert(it->GetSigOpCostWithAncestors() == nSigOpCheck);
assert(it->GetModFeesWithAncestors() == nFeesCheck);
// Check children against mapNextTx
CTxMemPool::setEntries setChildrenCheck;
auto iter = mapNextTx.lower_bound(COutPoint(it->GetTx().GetHash(), 0));
int64_t childSizes = 0;
for (; iter != mapNextTx.end() && iter->first->hash == it->GetTx().GetHash(); ++iter) {
txiter childit = mapTx.find(iter->second->GetHash());
assert(childit != mapTx.end()); // mapNextTx points to in-mempool transactions
if (setChildrenCheck.insert(childit).second) {
childSizes += childit->GetTxSize();
}
}
assert(setChildrenCheck == GetMemPoolChildren(it));
// Also check to make sure size is greater than sum with immediate children.
// just a sanity check, not definitive that this calc is correct...
assert(it->GetSizeWithDescendants() >= childSizes + it->GetTxSize());
if (fDependsWait)
waitingOnDependants.push_back(&(*it));
else {
CValidationState state;
bool fCheckResult = tx.IsCoinBase() ||
Consensus::CheckTxInputs(tx, state, mempoolDuplicate, nSpendHeight);
assert(fCheckResult);
UpdateCoins(tx, mempoolDuplicate, 1000000);
}
}
unsigned int stepsSinceLastRemove = 0;
while (!waitingOnDependants.empty()) {
const CTxMemPoolEntry* entry = waitingOnDependants.front();
waitingOnDependants.pop_front();
CValidationState state;
if (!mempoolDuplicate.HaveInputs(entry->GetTx())) {
waitingOnDependants.push_back(entry);
stepsSinceLastRemove++;
assert(stepsSinceLastRemove < waitingOnDependants.size());
} else {
bool fCheckResult = entry->GetTx().IsCoinBase() ||
Consensus::CheckTxInputs(entry->GetTx(), state, mempoolDuplicate, nSpendHeight);
assert(fCheckResult);
UpdateCoins(entry->GetTx(), mempoolDuplicate, 1000000);
stepsSinceLastRemove = 0;
}
}
for (auto it = mapNextTx.cbegin(); it != mapNextTx.cend(); it++) {
uint256 hash = it->second->GetHash();
indexed_transaction_set::const_iterator it2 = mapTx.find(hash);
const CTransaction& tx = it2->GetTx();
assert(it2 != mapTx.end());
assert(&tx == it->second);
}
assert(totalTxSize == checkTotal);
assert(innerUsage == cachedInnerUsage);
}
bool CTxMemPool::CompareDepthAndScore(const uint256& hasha, const uint256& hashb)
{
LOCK(cs);
indexed_transaction_set::const_iterator i = mapTx.find(hasha);
if (i == mapTx.end()) return false;
indexed_transaction_set::const_iterator j = mapTx.find(hashb);
if (j == mapTx.end()) return true;
uint64_t counta = i->GetCountWithAncestors();
uint64_t countb = j->GetCountWithAncestors();
if (counta == countb) {
return CompareTxMemPoolEntryByScore()(*i, *j);
}
return counta < countb;
}
namespace {
class DepthAndScoreComparator
{
public:
bool operator()(const CTxMemPool::indexed_transaction_set::const_iterator& a, const CTxMemPool::indexed_transaction_set::const_iterator& b)
{
uint64_t counta = a->GetCountWithAncestors();
uint64_t countb = b->GetCountWithAncestors();
if (counta == countb) {
return CompareTxMemPoolEntryByScore()(*a, *b);
}
return counta < countb;
}
};
}
std::vector<CTxMemPool::indexed_transaction_set::const_iterator> CTxMemPool::GetSortedDepthAndScore() const
{
std::vector<indexed_transaction_set::const_iterator> iters;
AssertLockHeld(cs);
iters.reserve(mapTx.size());
for (indexed_transaction_set::iterator mi = mapTx.begin(); mi != mapTx.end(); ++mi) {
iters.push_back(mi);
}
std::sort(iters.begin(), iters.end(), DepthAndScoreComparator());
return iters;
}
void CTxMemPool::queryHashes(vector<uint256>& vtxid)
{
LOCK(cs);
auto iters = GetSortedDepthAndScore();
vtxid.clear();
vtxid.reserve(mapTx.size());
for (auto it : iters) {
vtxid.push_back(it->GetTx().GetHash());
}
}
std::vector<TxMempoolInfo> CTxMemPool::infoAll() const
{
LOCK(cs);
auto iters = GetSortedDepthAndScore();
std::vector<TxMempoolInfo> ret;
ret.reserve(mapTx.size());
for (auto it : iters) {
ret.push_back(TxMempoolInfo{it->GetSharedTx(), it->GetTime(), CFeeRate(it->GetFee(), it->GetTxSize())});
}
return ret;
}
std::shared_ptr<const CTransaction> CTxMemPool::get(const uint256& hash) const
{
LOCK(cs);
indexed_transaction_set::const_iterator i = mapTx.find(hash);
if (i == mapTx.end())
return nullptr;
return i->GetSharedTx();
}
TxMempoolInfo CTxMemPool::info(const uint256& hash) const
{
LOCK(cs);
indexed_transaction_set::const_iterator i = mapTx.find(hash);
if (i == mapTx.end())
return TxMempoolInfo();
return TxMempoolInfo{i->GetSharedTx(), i->GetTime(), CFeeRate(i->GetFee(), i->GetTxSize())};
}
CFeeRate CTxMemPool::estimateFee(int nBlocks) const
{
LOCK(cs);
return minerPolicyEstimator->estimateFee(nBlocks);
}
CFeeRate CTxMemPool::estimateSmartFee(int nBlocks, int *answerFoundAtBlocks) const
{
LOCK(cs);
return minerPolicyEstimator->estimateSmartFee(nBlocks, answerFoundAtBlocks, *this);
}
double CTxMemPool::estimatePriority(int nBlocks) const
{
LOCK(cs);
return minerPolicyEstimator->estimatePriority(nBlocks);
}
double CTxMemPool::estimateSmartPriority(int nBlocks, int *answerFoundAtBlocks) const
{
LOCK(cs);
return minerPolicyEstimator->estimateSmartPriority(nBlocks, answerFoundAtBlocks, *this);
}
bool
CTxMemPool::WriteFeeEstimates(CAutoFile& fileout) const
{
try {
LOCK(cs);
fileout << 109900; // version required to read: 0.10.99 or later
fileout << CLIENT_VERSION; // version that wrote the file
minerPolicyEstimator->Write(fileout);
}
catch (const std::exception&) {
LogPrintf("CTxMemPool::WriteFeeEstimates(): unable to write policy estimator data (non-fatal)\n");
return false;
}
return true;
}
bool
CTxMemPool::ReadFeeEstimates(CAutoFile& filein)
{
try {
int nVersionRequired, nVersionThatWrote;
filein >> nVersionRequired >> nVersionThatWrote;
if (nVersionRequired > CLIENT_VERSION)
return error("CTxMemPool::ReadFeeEstimates(): up-version (%d) fee estimate file", nVersionRequired);
LOCK(cs);
minerPolicyEstimator->Read(filein);
}
catch (const std::exception&) {
LogPrintf("CTxMemPool::ReadFeeEstimates(): unable to read policy estimator data (non-fatal)\n");
return false;
}
return true;
}
void CTxMemPool::PrioritiseTransaction(const uint256 hash, const string strHash, double dPriorityDelta, const CAmount& nFeeDelta)
{
{
LOCK(cs);
std::pair<double, CAmount> &deltas = mapDeltas[hash];
deltas.first += dPriorityDelta;
deltas.second += nFeeDelta;
txiter it = mapTx.find(hash);
if (it != mapTx.end()) {
mapTx.modify(it, update_fee_delta(deltas.second));
// Now update all ancestors' modified fees with descendants
setEntries setAncestors;
uint64_t nNoLimit = std::numeric_limits<uint64_t>::max();
std::string dummy;
CalculateMemPoolAncestors(*it, setAncestors, nNoLimit, nNoLimit, nNoLimit, nNoLimit, dummy, false);
BOOST_FOREACH(txiter ancestorIt, setAncestors) {
mapTx.modify(ancestorIt, update_descendant_state(0, nFeeDelta, 0));
}
}
}
LogPrintf("PrioritiseTransaction: %s priority += %f, fee += %d\n", strHash, dPriorityDelta, FormatMoney(nFeeDelta));
}
void CTxMemPool::ApplyDeltas(const uint256 hash, double &dPriorityDelta, CAmount &nFeeDelta) const
{
LOCK(cs);
std::map<uint256, std::pair<double, CAmount> >::const_iterator pos = mapDeltas.find(hash);
if (pos == mapDeltas.end())
return;
const std::pair<double, CAmount> &deltas = pos->second;
dPriorityDelta += deltas.first;
nFeeDelta += deltas.second;
}
void CTxMemPool::ClearPrioritisation(const uint256 hash)
{
LOCK(cs);
mapDeltas.erase(hash);
}
bool CTxMemPool::HasNoInputsOf(const CTransaction &tx) const
{
for (unsigned int i = 0; i < tx.vin.size(); i++)
if (exists(tx.vin[i].prevout.hash))
return false;
return true;
}
CCoinsViewMemPool::CCoinsViewMemPool(CCoinsView* baseIn, const CTxMemPool& mempoolIn) : CCoinsViewBacked(baseIn), mempool(mempoolIn) { }
bool CCoinsViewMemPool::GetCoins(const uint256 &txid, CCoins &coins) const {
// If an entry in the mempool exists, always return that one, as it's guaranteed to never
// conflict with the underlying cache, and it cannot have pruned entries (as it contains full)
// transactions. First checking the underlying cache risks returning a pruned entry instead.
shared_ptr<const CTransaction> ptx = mempool.get(txid);
if (ptx) {
coins = CCoins(*ptx, MEMPOOL_HEIGHT);
return true;
}
return (base->GetCoins(txid, coins) && !coins.IsPruned());
}
bool CCoinsViewMemPool::HaveCoins(const uint256 &txid) const {
return mempool.exists(txid) || base->HaveCoins(txid);
}
size_t CTxMemPool::DynamicMemoryUsage() const {
LOCK(cs);
// Estimate the overhead of mapTx to be 15 pointers + an allocation, as no exact formula for boost::multi_index_contained is implemented.
return memusage::MallocUsage(sizeof(CTxMemPoolEntry) + 15 * sizeof(void*)) * mapTx.size() + memusage::DynamicUsage(mapNextTx) + memusage::DynamicUsage(mapDeltas) + memusage::DynamicUsage(mapLinks) + memusage::DynamicUsage(vTxHashes) + cachedInnerUsage;
}
void CTxMemPool::RemoveStaged(setEntries &stage, bool updateDescendants) {
AssertLockHeld(cs);
UpdateForRemoveFromMempool(stage, updateDescendants);
BOOST_FOREACH(const txiter& it, stage) {
removeUnchecked(it);
}
}
int CTxMemPool::Expire(int64_t time) {
LOCK(cs);
indexed_transaction_set::index<entry_time>::type::iterator it = mapTx.get<entry_time>().begin();
setEntries toremove;
while (it != mapTx.get<entry_time>().end() && it->GetTime() < time) {
toremove.insert(mapTx.project<0>(it));
it++;
}
setEntries stage;
BOOST_FOREACH(txiter removeit, toremove) {
CalculateDescendants(removeit, stage);
}
RemoveStaged(stage, false);
return stage.size();
}
bool CTxMemPool::addUnchecked(const uint256&hash, const CTxMemPoolEntry &entry, bool fCurrentEstimate)
{
LOCK(cs);
setEntries setAncestors;
uint64_t nNoLimit = std::numeric_limits<uint64_t>::max();
std::string dummy;
CalculateMemPoolAncestors(entry, setAncestors, nNoLimit, nNoLimit, nNoLimit, nNoLimit, dummy);
return addUnchecked(hash, entry, setAncestors, fCurrentEstimate);
}
void CTxMemPool::UpdateChild(txiter entry, txiter child, bool add)
{
setEntries s;
if (add && mapLinks[entry].children.insert(child).second) {
cachedInnerUsage += memusage::IncrementalDynamicUsage(s);
} else if (!add && mapLinks[entry].children.erase(child)) {
cachedInnerUsage -= memusage::IncrementalDynamicUsage(s);
}
}
void CTxMemPool::UpdateParent(txiter entry, txiter parent, bool add)
{
setEntries s;
if (add && mapLinks[entry].parents.insert(parent).second) {
cachedInnerUsage += memusage::IncrementalDynamicUsage(s);
} else if (!add && mapLinks[entry].parents.erase(parent)) {
cachedInnerUsage -= memusage::IncrementalDynamicUsage(s);
}
}
const CTxMemPool::setEntries & CTxMemPool::GetMemPoolParents(txiter entry) const
{
assert (entry != mapTx.end());
txlinksMap::const_iterator it = mapLinks.find(entry);
assert(it != mapLinks.end());
return it->second.parents;
}
const CTxMemPool::setEntries & CTxMemPool::GetMemPoolChildren(txiter entry) const
{
assert (entry != mapTx.end());
txlinksMap::const_iterator it = mapLinks.find(entry);
assert(it != mapLinks.end());
return it->second.children;
}
CFeeRate CTxMemPool::GetMinFee(size_t sizelimit) const {
LOCK(cs);
if (!blockSinceLastRollingFeeBump || rollingMinimumFeeRate == 0)
return CFeeRate(rollingMinimumFeeRate);
int64_t time = GetTime();
if (time > lastRollingFeeUpdate + 10) {
double halflife = ROLLING_FEE_HALFLIFE;
if (DynamicMemoryUsage() < sizelimit / 4)
halflife /= 4;
else if (DynamicMemoryUsage() < sizelimit / 2)
halflife /= 2;
rollingMinimumFeeRate = rollingMinimumFeeRate / pow(2.0, (time - lastRollingFeeUpdate) / halflife);
lastRollingFeeUpdate = time;
if (rollingMinimumFeeRate < minReasonableRelayFee.GetFeePerK() / 2) {
rollingMinimumFeeRate = 0;
return CFeeRate(0);
}
}
return std::max(CFeeRate(rollingMinimumFeeRate), minReasonableRelayFee);
}
void CTxMemPool::trackPackageRemoved(const CFeeRate& rate) {
AssertLockHeld(cs);
if (rate.GetFeePerK() > rollingMinimumFeeRate) {
rollingMinimumFeeRate = rate.GetFeePerK();
blockSinceLastRollingFeeBump = false;
}
}
void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<uint256>* pvNoSpendsRemaining) {
LOCK(cs);
unsigned nTxnRemoved = 0;
CFeeRate maxFeeRateRemoved(0);
while (!mapTx.empty() && DynamicMemoryUsage() > sizelimit) {
indexed_transaction_set::index<descendant_score>::type::iterator it = mapTx.get<descendant_score>().begin();
// We set the new mempool min fee to the feerate of the removed set, plus the
// "minimum reasonable fee rate" (ie some value under which we consider txn
// to have 0 fee). This way, we don't allow txn to enter mempool with feerate
// equal to txn which were removed with no block in between.
CFeeRate removed(it->GetModFeesWithDescendants(), it->GetSizeWithDescendants());
removed += minReasonableRelayFee;
trackPackageRemoved(removed);
maxFeeRateRemoved = std::max(maxFeeRateRemoved, removed);
setEntries stage;
CalculateDescendants(mapTx.project<0>(it), stage);
nTxnRemoved += stage.size();
std::vector<CTransaction> txn;
if (pvNoSpendsRemaining) {
txn.reserve(stage.size());
BOOST_FOREACH(txiter iter, stage)
txn.push_back(iter->GetTx());
}
RemoveStaged(stage, false);
if (pvNoSpendsRemaining) {
BOOST_FOREACH(const CTransaction& tx, txn) {
BOOST_FOREACH(const CTxIn& txin, tx.vin) {
if (exists(txin.prevout.hash))
continue;
auto iter = mapNextTx.lower_bound(COutPoint(txin.prevout.hash, 0));
if (iter == mapNextTx.end() || iter->first->hash != txin.prevout.hash)
pvNoSpendsRemaining->push_back(txin.prevout.hash);
}
}
}
}
if (maxFeeRateRemoved > CFeeRate(0))
LogPrint("mempool", "Removed %u txn, rolling minimum fee bumped to %s\n", nTxnRemoved, maxFeeRateRemoved.ToString());
}
diff --git a/src/txmempool.h b/src/txmempool.h
index 1763930ba..297f5b8e5 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -1,715 +1,715 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_TXMEMPOOL_H
#define BITCOIN_TXMEMPOOL_H
#include <list>
#include <memory>
#include <set>
#include "amount.h"
#include "coins.h"
#include "indirectmap.h"
#include "primitives/transaction.h"
#include "sync.h"
#include "random.h"
#undef foreach
#include "boost/multi_index_container.hpp"
#include "boost/multi_index/ordered_index.hpp"
#include "boost/multi_index/hashed_index.hpp"
class CAutoFile;
class CBlockIndex;
inline double AllowFreeThreshold()
{
return COIN * 144 / 250;
}
inline bool AllowFree(double dPriority)
{
// Large (in bytes) low-priority (new, small-coin) transactions
// need a fee.
return dPriority > AllowFreeThreshold();
}
/** Fake height value used in CCoins to signify they are only in the memory pool (since 0.8) */
static const unsigned int MEMPOOL_HEIGHT = 0x7FFFFFFF;
struct LockPoints
{
// Will be set to the blockchain height and median time past
// values that would be necessary to satisfy all relative locktime
// constraints (BIP68) of this tx given our view of block chain history
int height;
int64_t time;
// As long as the current chain descends from the highest height block
// containing one of the inputs used in the calculation, then the cached
// values are still valid even after a reorg.
CBlockIndex* maxInputBlock;
LockPoints() : height(0), time(0), maxInputBlock(NULL) { }
};
class CTxMemPool;
/** \class CTxMemPoolEntry
*
* CTxMemPoolEntry stores data about the correponding transaction, as well
* as data about all in-mempool transactions that depend on the transaction
* ("descendant" transactions).
*
* When a new entry is added to the mempool, we update the descendant state
* (nCountWithDescendants, nSizeWithDescendants, and nModFeesWithDescendants) for
* all ancestors of the newly added transaction.
*
* If updating the descendant state is skipped, we can mark the entry as
* "dirty", and set nSizeWithDescendants/nModFeesWithDescendants to equal nTxSize/
* nFee+feeDelta. (This can potentially happen during a reorg, where we limit the
* amount of work we're willing to do to avoid consuming too much CPU.)
*
*/
class CTxMemPoolEntry
{
private:
std::shared_ptr<const CTransaction> tx;
CAmount nFee; //!< Cached to avoid expensive parent-transaction lookups
size_t nTxWeight; //!< ... and avoid recomputing tx weight (also used for GetTxSize())
size_t nModSize; //!< ... and modified size for priority
size_t nUsageSize; //!< ... and total memory usage
int64_t nTime; //!< Local time when entering the mempool
double entryPriority; //!< Priority when entering the mempool
unsigned int entryHeight; //!< Chain height when entering the mempool
bool hadNoDependencies; //!< Not dependent on any other txs when it entered the mempool
CAmount inChainInputValue; //!< Sum of all txin values that are already in blockchain
bool spendsCoinbase; //!< keep track of transactions that spend a coinbase
int64_t sigOpCost; //!< Total sigop cost
int64_t feeDelta; //!< Used for determining the priority of the transaction for mining in a block
LockPoints lockPoints; //!< Track the height and time at which tx was final
// Information about descendants of this transaction that are in the
// mempool; if we remove this transaction we must remove all of these
// descendants as well. if nCountWithDescendants is 0, treat this entry as
// dirty, and nSizeWithDescendants and nModFeesWithDescendants will not be
// correct.
uint64_t nCountWithDescendants; //!< number of descendant transactions
uint64_t nSizeWithDescendants; //!< ... and size
CAmount nModFeesWithDescendants; //!< ... and total fees (all including us)
// Analogous statistics for ancestor transactions
uint64_t nCountWithAncestors;
uint64_t nSizeWithAncestors;
CAmount nModFeesWithAncestors;
int64_t nSigOpCostWithAncestors;
public:
CTxMemPoolEntry(const CTransaction& _tx, const CAmount& _nFee,
int64_t _nTime, double _entryPriority, unsigned int _entryHeight,
bool poolHasNoInputsOf, CAmount _inChainInputValue, bool spendsCoinbase,
int64_t nSigOpsCost, LockPoints lp);
CTxMemPoolEntry(const CTxMemPoolEntry& other);
const CTransaction& GetTx() const { return *this->tx; }
std::shared_ptr<const CTransaction> GetSharedTx() const { return this->tx; }
/**
* Fast calculation of lower bound of current priority as update
* from entry priority. Only inputs that were originally in-chain will age.
*/
double GetPriority(unsigned int currentHeight) const;
const CAmount& GetFee() const { return nFee; }
size_t GetTxSize() const;
size_t GetTxWeight() const { return nTxWeight; }
int64_t GetTime() const { return nTime; }
unsigned int GetHeight() const { return entryHeight; }
bool WasClearAtEntry() const { return hadNoDependencies; }
int64_t GetSigOpCost() const { return sigOpCost; }
int64_t GetModifiedFee() const { return nFee + feeDelta; }
size_t DynamicMemoryUsage() const { return nUsageSize; }
const LockPoints& GetLockPoints() const { return lockPoints; }
// Adjusts the descendant state, if this entry is not dirty.
void UpdateDescendantState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount);
// Adjusts the ancestor state
void UpdateAncestorState(int64_t modifySize, CAmount modifyFee, int64_t modifyCount, int modifySigOps);
// Updates the fee delta used for mining priority score, and the
// modified fees with descendants.
void UpdateFeeDelta(int64_t feeDelta);
// Update the LockPoints after a reorg
void UpdateLockPoints(const LockPoints& lp);
uint64_t GetCountWithDescendants() const { return nCountWithDescendants; }
uint64_t GetSizeWithDescendants() const { return nSizeWithDescendants; }
CAmount GetModFeesWithDescendants() const { return nModFeesWithDescendants; }
bool GetSpendsCoinbase() const { return spendsCoinbase; }
uint64_t GetCountWithAncestors() const { return nCountWithAncestors; }
uint64_t GetSizeWithAncestors() const { return nSizeWithAncestors; }
CAmount GetModFeesWithAncestors() const { return nModFeesWithAncestors; }
int64_t GetSigOpCostWithAncestors() const { return nSigOpCostWithAncestors; }
mutable size_t vTxHashesIdx; //!< Index in mempool's vTxHashes
};
// Helpers for modifying CTxMemPool::mapTx, which is a boost multi_index.
struct update_descendant_state
{
update_descendant_state(int64_t _modifySize, CAmount _modifyFee, int64_t _modifyCount) :
modifySize(_modifySize), modifyFee(_modifyFee), modifyCount(_modifyCount)
{}
void operator() (CTxMemPoolEntry &e)
{ e.UpdateDescendantState(modifySize, modifyFee, modifyCount); }
private:
int64_t modifySize;
CAmount modifyFee;
int64_t modifyCount;
};
struct update_ancestor_state
{
update_ancestor_state(int64_t _modifySize, CAmount _modifyFee, int64_t _modifyCount, int64_t _modifySigOpsCost) :
modifySize(_modifySize), modifyFee(_modifyFee), modifyCount(_modifyCount), modifySigOpsCost(_modifySigOpsCost)
{}
void operator() (CTxMemPoolEntry &e)
{ e.UpdateAncestorState(modifySize, modifyFee, modifyCount, modifySigOpsCost); }
private:
int64_t modifySize;
CAmount modifyFee;
int64_t modifyCount;
int64_t modifySigOpsCost;
};
struct update_fee_delta
{
update_fee_delta(int64_t _feeDelta) : feeDelta(_feeDelta) { }
void operator() (CTxMemPoolEntry &e) { e.UpdateFeeDelta(feeDelta); }
private:
int64_t feeDelta;
};
struct update_lock_points
{
update_lock_points(const LockPoints& _lp) : lp(_lp) { }
void operator() (CTxMemPoolEntry &e) { e.UpdateLockPoints(lp); }
private:
const LockPoints& lp;
};
// extracts a TxMemPoolEntry's transaction hash
struct mempoolentry_txid
{
typedef uint256 result_type;
result_type operator() (const CTxMemPoolEntry &entry) const
{
return entry.GetTx().GetHash();
}
};
/** \class CompareTxMemPoolEntryByDescendantScore
*
* Sort an entry by max(score/size of entry's tx, score/size with all descendants).
*/
class CompareTxMemPoolEntryByDescendantScore
{
public:
bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b)
{
bool fUseADescendants = UseDescendantScore(a);
bool fUseBDescendants = UseDescendantScore(b);
double aModFee = fUseADescendants ? a.GetModFeesWithDescendants() : a.GetModifiedFee();
double aSize = fUseADescendants ? a.GetSizeWithDescendants() : a.GetTxSize();
double bModFee = fUseBDescendants ? b.GetModFeesWithDescendants() : b.GetModifiedFee();
double bSize = fUseBDescendants ? b.GetSizeWithDescendants() : b.GetTxSize();
// Avoid division by rewriting (a/b > c/d) as (a*d > c*b).
double f1 = aModFee * bSize;
double f2 = aSize * bModFee;
if (f1 == f2) {
return a.GetTime() >= b.GetTime();
}
return f1 < f2;
}
// Calculate which score to use for an entry (avoiding division).
bool UseDescendantScore(const CTxMemPoolEntry &a)
{
double f1 = (double)a.GetModifiedFee() * a.GetSizeWithDescendants();
double f2 = (double)a.GetModFeesWithDescendants() * a.GetTxSize();
return f2 > f1;
}
};
/** \class CompareTxMemPoolEntryByScore
*
* Sort by score of entry ((fee+delta)/size) in descending order
*/
class CompareTxMemPoolEntryByScore
{
public:
bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b)
{
double f1 = (double)a.GetModifiedFee() * b.GetTxSize();
double f2 = (double)b.GetModifiedFee() * a.GetTxSize();
if (f1 == f2) {
return b.GetTx().GetHash() < a.GetTx().GetHash();
}
return f1 > f2;
}
};
class CompareTxMemPoolEntryByEntryTime
{
public:
bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b)
{
return a.GetTime() < b.GetTime();
}
};
class CompareTxMemPoolEntryByAncestorFee
{
public:
bool operator()(const CTxMemPoolEntry& a, const CTxMemPoolEntry& b)
{
double aFees = a.GetModFeesWithAncestors();
double aSize = a.GetSizeWithAncestors();
double bFees = b.GetModFeesWithAncestors();
double bSize = b.GetSizeWithAncestors();
// Avoid division by rewriting (a/b > c/d) as (a*d > c*b).
double f1 = aFees * bSize;
double f2 = aSize * bFees;
if (f1 == f2) {
return a.GetTx().GetHash() < b.GetTx().GetHash();
}
return f1 > f2;
}
};
// Multi_index tag names
struct descendant_score {};
struct entry_time {};
struct mining_score {};
struct ancestor_score {};
class CBlockPolicyEstimator;
/**
* Information about a mempool transaction.
*/
struct TxMempoolInfo
{
/** The transaction itself */
std::shared_ptr<const CTransaction> tx;
/** Time the transaction entered the mempool. */
int64_t nTime;
/** Feerate of the transaction. */
CFeeRate feeRate;
};
/**
* CTxMemPool stores valid-according-to-the-current-best-chain transactions
* that may be included in the next block.
*
* Transactions are added when they are seen on the network (or created by the
* local node), but not all transactions seen are added to the pool. For
* example, the following new transactions will not be added to the mempool:
* - a transaction which doesn't make the mimimum fee requirements.
* - a new transaction that double-spends an input of a transaction already in
* the pool where the new transaction does not meet the Replace-By-Fee
* requirements as defined in BIP 125.
* - a non-standard transaction.
*
* CTxMemPool::mapTx, and CTxMemPoolEntry bookkeeping:
*
* mapTx is a boost::multi_index that sorts the mempool on 4 criteria:
* - transaction hash
* - feerate [we use max(feerate of tx, feerate of tx with all descendants)]
* - time in mempool
* - mining score (feerate modified by any fee deltas from PrioritiseTransaction)
*
* Note: the term "descendant" refers to in-mempool transactions that depend on
* this one, while "ancestor" refers to in-mempool transactions that a given
* transaction depends on.
*
* In order for the feerate sort to remain correct, we must update transactions
* in the mempool when new descendants arrive. To facilitate this, we track
* the set of in-mempool direct parents and direct children in mapLinks. Within
* each CTxMemPoolEntry, we track the size and fees of all descendants.
*
* Usually when a new transaction is added to the mempool, it has no in-mempool
* children (because any such children would be an orphan). So in
* addUnchecked(), we:
* - update a new entry's setMemPoolParents to include all in-mempool parents
* - update the new entry's direct parents to include the new tx as a child
* - update all ancestors of the transaction to include the new tx's size/fee
*
* When a transaction is removed from the mempool, we must:
* - update all in-mempool parents to not track the tx in setMemPoolChildren
* - update all ancestors to not include the tx's size/fees in descendant state
* - update all in-mempool children to not include it as a parent
*
* These happen in UpdateForRemoveFromMempool(). (Note that when removing a
* transaction along with its descendants, we must calculate that set of
* transactions to be removed before doing the removal, or else the mempool can
* be in an inconsistent state where it's impossible to walk the ancestors of
* a transaction.)
*
* In the event of a reorg, the assumption that a newly added tx has no
* in-mempool children is false. In particular, the mempool is in an
* inconsistent state while new transactions are being added, because there may
* be descendant transactions of a tx coming from a disconnected block that are
* unreachable from just looking at transactions in the mempool (the linking
* transactions may also be in the disconnected block, waiting to be added).
* Because of this, there's not much benefit in trying to search for in-mempool
* children in addUnchecked(). Instead, in the special case of transactions
* being added from a disconnected block, we require the caller to clean up the
* state, to account for in-mempool, out-of-block descendants for all the
* in-block transactions by calling UpdateTransactionsFromBlock(). Note that
* until this is called, the mempool state is not consistent, and in particular
* mapLinks may not be correct (and therefore functions like
* CalculateMemPoolAncestors() and CalculateDescendants() that rely
* on them to walk the mempool are not generally safe to use).
*
* Computational limits:
*
* Updating all in-mempool ancestors of a newly added transaction can be slow,
* if no bound exists on how many in-mempool ancestors there may be.
* CalculateMemPoolAncestors() takes configurable limits that are designed to
* prevent these calculations from being too CPU intensive.
*
* Adding transactions from a disconnected block can be very time consuming,
* because we don't have a way to limit the number of in-mempool descendants.
* To bound CPU processing, we limit the amount of work we're willing to do
* to properly update the descendant information for a tx being added from
* a disconnected block. If we would exceed the limit, then we instead mark
* the entry as "dirty", and set the feerate for sorting purposes to be equal
* the feerate of the transaction without any descendants.
*
*/
class CTxMemPool
{
private:
uint32_t nCheckFrequency; //!< Value n means that n times in 2^32 we check.
unsigned int nTransactionsUpdated;
CBlockPolicyEstimator* minerPolicyEstimator;
uint64_t totalTxSize; //!< sum of all mempool tx' byte sizes
uint64_t cachedInnerUsage; //!< sum of dynamic memory usage of all the map elements (NOT the maps themselves)
CFeeRate minReasonableRelayFee;
mutable int64_t lastRollingFeeUpdate;
mutable bool blockSinceLastRollingFeeBump;
mutable double rollingMinimumFeeRate; //!< minimum fee to get into the pool, decreases exponentially
void trackPackageRemoved(const CFeeRate& rate);
public:
static const int ROLLING_FEE_HALFLIFE = 60 * 60 * 12; // public only for testing
typedef boost::multi_index_container<
CTxMemPoolEntry,
boost::multi_index::indexed_by<
// sorted by txid
boost::multi_index::hashed_unique<mempoolentry_txid, SaltedTxidHasher>,
// sorted by fee rate
boost::multi_index::ordered_non_unique<
boost::multi_index::tag<descendant_score>,
boost::multi_index::identity<CTxMemPoolEntry>,
CompareTxMemPoolEntryByDescendantScore
>,
// sorted by entry time
boost::multi_index::ordered_non_unique<
boost::multi_index::tag<entry_time>,
boost::multi_index::identity<CTxMemPoolEntry>,
CompareTxMemPoolEntryByEntryTime
>,
// sorted by score (for mining prioritization)
boost::multi_index::ordered_unique<
boost::multi_index::tag<mining_score>,
boost::multi_index::identity<CTxMemPoolEntry>,
CompareTxMemPoolEntryByScore
>,
// sorted by fee rate with ancestors
boost::multi_index::ordered_non_unique<
boost::multi_index::tag<ancestor_score>,
boost::multi_index::identity<CTxMemPoolEntry>,
CompareTxMemPoolEntryByAncestorFee
>
>
> indexed_transaction_set;
mutable CCriticalSection cs;
indexed_transaction_set mapTx;
typedef indexed_transaction_set::nth_index<0>::type::iterator txiter;
std::vector<std::pair<uint256, txiter> > vTxHashes; //!< All tx witness hashes/entries in mapTx, in random order
struct CompareIteratorByHash {
bool operator()(const txiter &a, const txiter &b) const {
return a->GetTx().GetHash() < b->GetTx().GetHash();
}
};
typedef std::set<txiter, CompareIteratorByHash> setEntries;
const setEntries & GetMemPoolParents(txiter entry) const;
const setEntries & GetMemPoolChildren(txiter entry) const;
private:
typedef std::map<txiter, setEntries, CompareIteratorByHash> cacheMap;
struct TxLinks {
setEntries parents;
setEntries children;
};
typedef std::map<txiter, TxLinks, CompareIteratorByHash> txlinksMap;
txlinksMap mapLinks;
void UpdateParent(txiter entry, txiter parent, bool add);
void UpdateChild(txiter entry, txiter child, bool add);
std::vector<indexed_transaction_set::const_iterator> GetSortedDepthAndScore() const;
public:
indirectmap<COutPoint, const CTransaction*> mapNextTx;
std::map<uint256, std::pair<double, CAmount> > mapDeltas;
/** Create a new CTxMemPool.
* minReasonableRelayFee should be a feerate which is, roughly, somewhere
* around what it "costs" to relay a transaction around the network and
* below which we would reasonably say a transaction has 0-effective-fee.
*/
CTxMemPool(const CFeeRate& _minReasonableRelayFee);
~CTxMemPool();
/**
* If sanity-checking is turned on, check makes sure the pool is
* consistent (does not contain two transactions that spend the same inputs,
* all inputs are in the mapNextTx array). If sanity-checking is turned off,
* check does nothing.
*/
void check(const CCoinsViewCache *pcoins) const;
void setSanityCheck(double dFrequency = 1.0) { nCheckFrequency = dFrequency * 4294967295.0; }
// addUnchecked must updated state for all ancestors of a given transaction,
// to track size/count of descendant transactions. First version of
// addUnchecked can be used to have it call CalculateMemPoolAncestors(), and
// then invoke the second version.
bool addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry, bool fCurrentEstimate = true);
bool addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry, setEntries &setAncestors, bool fCurrentEstimate = true);
- void removeRecursive(const CTransaction &tx, std::list<CTransaction>& removed);
+ void removeRecursive(const CTransaction &tx, std::list<CTransaction>* removed = NULL);
void removeForReorg(const CCoinsViewCache *pcoins, unsigned int nMemPoolHeight, int flags);
- void removeConflicts(const CTransaction &tx, std::list<CTransaction>& removed);
+ void removeConflicts(const CTransaction &tx, std::list<CTransaction>* removed = NULL);
void removeForBlock(const std::vector<CTransaction>& vtx, unsigned int nBlockHeight,
- std::list<CTransaction>& conflicts, bool fCurrentEstimate = true);
+ std::list<CTransaction>* conflicts = NULL, bool fCurrentEstimate = true);
void clear();
void _clear(); //lock free
bool CompareDepthAndScore(const uint256& hasha, const uint256& hashb);
void queryHashes(std::vector<uint256>& vtxid);
void pruneSpent(const uint256& hash, CCoins &coins);
unsigned int GetTransactionsUpdated() const;
void AddTransactionsUpdated(unsigned int n);
/**
* Check that none of this transactions inputs are in the mempool, and thus
* the tx is not dependent on other mempool transactions to be included in a block.
*/
bool HasNoInputsOf(const CTransaction& tx) const;
/** Affect CreateNewBlock prioritisation of transactions */
void PrioritiseTransaction(const uint256 hash, const std::string strHash, double dPriorityDelta, const CAmount& nFeeDelta);
void ApplyDeltas(const uint256 hash, double &dPriorityDelta, CAmount &nFeeDelta) const;
void ClearPrioritisation(const uint256 hash);
public:
/** Remove a set of transactions from the mempool.
* If a transaction is in this set, then all in-mempool descendants must
* also be in the set, unless this transaction is being removed for being
* in a block.
* Set updateDescendants to true when removing a tx that was in a block, so
* that any in-mempool descendants have their ancestor state updated.
*/
void RemoveStaged(setEntries &stage, bool updateDescendants);
/** When adding transactions from a disconnected block back to the mempool,
* new mempool entries may have children in the mempool (which is generally
* not the case when otherwise adding transactions).
* UpdateTransactionsFromBlock() will find child transactions and update the
* descendant state for each transaction in hashesToUpdate (excluding any
* child transactions present in hashesToUpdate, which are already accounted
* for). Note: hashesToUpdate should be the set of transactions from the
* disconnected block that have been accepted back into the mempool.
*/
void UpdateTransactionsFromBlock(const std::vector<uint256> &hashesToUpdate);
/** Try to calculate all in-mempool ancestors of entry.
* (these are all calculated including the tx itself)
* limitAncestorCount = max number of ancestors
* limitAncestorSize = max size of ancestors
* limitDescendantCount = max number of descendants any ancestor can have
* limitDescendantSize = max size of descendants any ancestor can have
* errString = populated with error reason if any limits are hit
* fSearchForParents = whether to search a tx's vin for in-mempool parents, or
* look up parents from mapLinks. Must be true for entries not in the mempool
*/
bool CalculateMemPoolAncestors(const CTxMemPoolEntry &entry, setEntries &setAncestors, uint64_t limitAncestorCount, uint64_t limitAncestorSize, uint64_t limitDescendantCount, uint64_t limitDescendantSize, std::string &errString, bool fSearchForParents = true) const;
/** Populate setDescendants with all in-mempool descendants of hash.
* Assumes that setDescendants includes all in-mempool descendants of anything
* already in it. */
void CalculateDescendants(txiter it, setEntries &setDescendants);
/** The minimum fee to get into the mempool, which may itself not be enough
* for larger-sized transactions.
* The minReasonableRelayFee constructor arg is used to bound the time it
* takes the fee rate to go back down all the way to 0. When the feerate
* would otherwise be half of this, it is set to 0 instead.
*/
CFeeRate GetMinFee(size_t sizelimit) const;
/** Remove transactions from the mempool until its dynamic size is <= sizelimit.
* pvNoSpendsRemaining, if set, will be populated with the list of transactions
* which are not in mempool which no longer have any spends in this mempool.
*/
void TrimToSize(size_t sizelimit, std::vector<uint256>* pvNoSpendsRemaining=NULL);
/** Expire all transaction (and their dependencies) in the mempool older than time. Return the number of removed transactions. */
int Expire(int64_t time);
unsigned long size()
{
LOCK(cs);
return mapTx.size();
}
uint64_t GetTotalTxSize()
{
LOCK(cs);
return totalTxSize;
}
bool exists(uint256 hash) const
{
LOCK(cs);
return (mapTx.count(hash) != 0);
}
std::shared_ptr<const CTransaction> get(const uint256& hash) const;
TxMempoolInfo info(const uint256& hash) const;
std::vector<TxMempoolInfo> infoAll() const;
/** Estimate fee rate needed to get into the next nBlocks
* If no answer can be given at nBlocks, return an estimate
* at the lowest number of blocks where one can be given
*/
CFeeRate estimateSmartFee(int nBlocks, int *answerFoundAtBlocks = NULL) const;
/** Estimate fee rate needed to get into the next nBlocks */
CFeeRate estimateFee(int nBlocks) const;
/** Estimate priority needed to get into the next nBlocks
* If no answer can be given at nBlocks, return an estimate
* at the lowest number of blocks where one can be given
*/
double estimateSmartPriority(int nBlocks, int *answerFoundAtBlocks = NULL) const;
/** Estimate priority needed to get into the next nBlocks */
double estimatePriority(int nBlocks) const;
/** Write/Read estimates to disk */
bool WriteFeeEstimates(CAutoFile& fileout) const;
bool ReadFeeEstimates(CAutoFile& filein);
size_t DynamicMemoryUsage() const;
private:
/** UpdateForDescendants is used by UpdateTransactionsFromBlock to update
* the descendants for a single transaction that has been added to the
* mempool but may have child transactions in the mempool, eg during a
* chain reorg. setExclude is the set of descendant transactions in the
* mempool that must not be accounted for (because any descendants in
* setExclude were added to the mempool after the transaction being
* updated and hence their state is already reflected in the parent
* state).
*
* cachedDescendants will be updated with the descendants of the transaction
* being updated, so that future invocations don't need to walk the
* same transaction again, if encountered in another transaction chain.
*/
void UpdateForDescendants(txiter updateIt,
cacheMap &cachedDescendants,
const std::set<uint256> &setExclude);
/** Update ancestors of hash to add/remove it as a descendant transaction. */
void UpdateAncestorsOf(bool add, txiter hash, setEntries &setAncestors);
/** Set ancestor state for an entry */
void UpdateEntryForAncestors(txiter it, const setEntries &setAncestors);
/** For each transaction being removed, update ancestors and any direct children.
* If updateDescendants is true, then also update in-mempool descendants'
* ancestor state. */
void UpdateForRemoveFromMempool(const setEntries &entriesToRemove, bool updateDescendants);
/** Sever link between specified transaction and direct children. */
void UpdateChildrenForRemoval(txiter entry);
/** Before calling removeUnchecked for a given transaction,
* UpdateForRemoveFromMempool must be called on the entire (dependent) set
* of transactions being removed at the same time. We use each
* CTxMemPoolEntry's setMemPoolParents in order to walk ancestors of a
* given transaction that is removed, so we can't remove intermediate
* transactions in a chain before we've updated all the state for the
* removal.
*/
void removeUnchecked(txiter entry);
};
/**
* CCoinsView that brings transactions from a memorypool into view.
* It does not check for spendings by memory pool transactions.
*/
class CCoinsViewMemPool : public CCoinsViewBacked
{
protected:
const CTxMemPool& mempool;
public:
CCoinsViewMemPool(CCoinsView* baseIn, const CTxMemPool& mempoolIn);
bool GetCoins(const uint256 &txid, CCoins &coins) const;
bool HaveCoins(const uint256 &txid) const;
};
// We want to sort transactions by coin age priority
typedef std::pair<double, CTxMemPool::txiter> TxCoinAgePriority;
struct TxCoinAgePriorityCompare
{
bool operator()(const TxCoinAgePriority& a, const TxCoinAgePriority& b)
{
if (a.first == b.first)
return CompareTxMemPoolEntryByScore()(*(b.second), *(a.second)); //Reverse order to make sort less than
return a.first < b.first;
}
};
#endif // BITCOIN_TXMEMPOOL_H

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