forked from stellar/stellar-core
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HerderImpl.cpp
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HerderImpl.cpp
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// Copyright 2014 Stellar Development Foundation and contributors. Licensed
// under the Apache License, Version 2.0. See the COPYING file at the root
// of this distribution or at http://www.apache.org/licenses/LICENSE-2.0
#include "herder/HerderImpl.h"
#include "crypto/Hex.h"
#include "crypto/KeyUtils.h"
#include "crypto/SHA.h"
#include "crypto/SecretKey.h"
#include "herder/HerderPersistence.h"
#include "herder/HerderUtils.h"
#include "herder/LedgerCloseData.h"
#include "herder/QuorumIntersectionChecker.h"
#include "herder/TxSetFrame.h"
#include "ledger/LedgerManager.h"
#include "ledger/LedgerTxn.h"
#include "ledger/LedgerTxnEntry.h"
#include "ledger/LedgerTxnHeader.h"
#include "lib/json/json.h"
#include "main/Application.h"
#include "main/Config.h"
#include "main/ErrorMessages.h"
#include "main/PersistentState.h"
#include "overlay/OverlayManager.h"
#include "scp/LocalNode.h"
#include "scp/Slot.h"
#include "transactions/TransactionUtils.h"
#include "util/Logging.h"
#include "util/StatusManager.h"
#include "util/Timer.h"
#include "medida/counter.h"
#include "medida/meter.h"
#include "medida/metrics_registry.h"
#include "util/Decoder.h"
#include "util/XDRStream.h"
#include "xdrpp/marshal.h"
#include <Tracy.hpp>
#include <ctime>
#include <fmt/format.h>
using namespace std;
namespace stellar
{
constexpr auto const TRANSACTION_QUEUE_SIZE = 4;
constexpr auto const TRANSACTION_QUEUE_BAN_SIZE = 10;
constexpr auto const TRANSACTION_QUEUE_MULTIPLIER = 4;
constexpr size_t const OPERATION_BROADCAST_MULTIPLIER = 2;
std::unique_ptr<Herder>
Herder::create(Application& app)
{
return std::make_unique<HerderImpl>(app);
}
HerderImpl::SCPMetrics::SCPMetrics(Application& app)
: mLostSync(app.getMetrics().NewMeter({"scp", "sync", "lost"}, "sync"))
, mEnvelopeEmit(
app.getMetrics().NewMeter({"scp", "envelope", "emit"}, "envelope"))
, mEnvelopeReceive(
app.getMetrics().NewMeter({"scp", "envelope", "receive"}, "envelope"))
, mCumulativeStatements(app.getMetrics().NewCounter(
{"scp", "memory", "cumulative-statements"}))
, mEnvelopeValidSig(app.getMetrics().NewMeter(
{"scp", "envelope", "validsig"}, "envelope"))
, mEnvelopeInvalidSig(app.getMetrics().NewMeter(
{"scp", "envelope", "invalidsig"}, "envelope"))
{
}
HerderImpl::HerderImpl(Application& app)
: mTransactionQueue(app, TRANSACTION_QUEUE_SIZE, TRANSACTION_QUEUE_BAN_SIZE,
TRANSACTION_QUEUE_MULTIPLIER)
, mPendingEnvelopes(app, *this)
, mHerderSCPDriver(app, *this, mUpgrades, mPendingEnvelopes)
, mLastSlotSaved(0)
, mTrackingTimer(app)
, mLastExternalize(app.getClock().now())
, mTriggerTimer(app)
, mRebroadcastTimer(app)
, mApp(app)
, mLedgerManager(app.getLedgerManager())
, mSCPMetrics(app)
{
auto ln = getSCP().getLocalNode();
mPendingEnvelopes.addSCPQuorumSet(ln->getQuorumSetHash(),
ln->getQuorumSet());
}
HerderImpl::~HerderImpl()
{
}
Herder::State
HerderImpl::getState() const
{
return mHerderSCPDriver.getState();
}
SCP&
HerderImpl::getSCP()
{
return mHerderSCPDriver.getSCP();
}
void
HerderImpl::syncMetrics()
{
int64_t count = getSCP().getCumulativeStatemtCount();
mSCPMetrics.mCumulativeStatements.set_count(count);
TracyPlot("scp.memory.cumulative-statements", count);
}
std::string
HerderImpl::getStateHuman() const
{
static const char* stateStrings[HERDER_NUM_STATE] = {
"HERDER_SYNCING_STATE", "HERDER_TRACKING_STATE"};
return std::string(stateStrings[getState()]);
}
void
HerderImpl::bootstrap()
{
CLOG(INFO, "Herder") << "Force joining SCP with local state";
assert(getSCP().isValidator());
assert(mApp.getConfig().FORCE_SCP);
mLedgerManager.bootstrap();
mHerderSCPDriver.bootstrap();
ledgerClosed(true);
}
void
HerderImpl::shutdown()
{
if (mLastQuorumMapIntersectionState.mRecalculating)
{
// We want to interrupt any calculation-in-progress at shutdown to
// avoid a long pause joining worker threads.
CLOG(DEBUG, "Herder")
<< "Shutdown interrupting quorum transitive closure analysis.";
mLastQuorumMapIntersectionState.mInterruptFlag = true;
}
}
void
HerderImpl::processExternalized(uint64 slotIndex, StellarValue const& value)
{
ZoneScoped;
bool validated = getSCP().isSlotFullyValidated(slotIndex);
if (Logging::logDebug("Herder"))
{
CLOG(DEBUG, "Herder") << fmt::format(
"HerderSCPDriver::valueExternalized index: {} txSet: {}", slotIndex,
hexAbbrev(value.txSetHash));
}
if (getSCP().isValidator() && !validated)
{
CLOG(WARNING, "Herder")
<< fmt::format("Ledger {} ({}) closed and could NOT be fully "
"validated by validator",
slotIndex, hexAbbrev(value.txSetHash));
}
TxSetFramePtr externalizedSet = mPendingEnvelopes.getTxSet(value.txSetHash);
// save the SCP messages in the database
if (mApp.getConfig().MODE_STORES_HISTORY)
{
mApp.getHerderPersistence().saveSCPHistory(
static_cast<uint32>(slotIndex),
getSCP().getExternalizingState(slotIndex),
mPendingEnvelopes.getCurrentlyTrackedQuorum());
}
// reflect upgrades with the ones included in this SCP round
{
bool updated;
auto newUpgrades = mUpgrades.removeUpgrades(value.upgrades.begin(),
value.upgrades.end(),
value.closeTime, updated);
if (updated)
{
setUpgrades(newUpgrades);
}
}
// tell the LedgerManager that this value got externalized
// LedgerManager will perform the proper action based on its internal
// state: apply, trigger catchup, etc
LedgerCloseData ledgerData(static_cast<uint32_t>(slotIndex),
externalizedSet, value);
mLedgerManager.valueExternalized(ledgerData);
}
void
HerderImpl::valueExternalized(uint64 slotIndex, StellarValue const& value)
{
ZoneScoped;
const int DUMP_SCP_TIMEOUT_SECONDS = 20;
// SCPDriver always updates tracking for latest slots
bool isLatestSlot = slotIndex == getCurrentLedgerSeq();
if (isLatestSlot)
{
// called both here and at the end (this one is in case of an exception)
trackingHeartBeat();
// dump SCP information if this ledger took a long time
auto gap = std::chrono::duration<double>(mApp.getClock().now() -
mLastExternalize)
.count();
if (gap > DUMP_SCP_TIMEOUT_SECONDS)
{
auto slotInfo = getJsonQuorumInfo(getSCP().getLocalNodeID(), false,
false, slotIndex);
Json::FastWriter fw;
CLOG(WARNING, "Herder")
<< fmt::format("Ledger took {} seconds, SCP information:{}",
gap, fw.write(slotInfo));
}
// trigger will be recreated when the ledger is closed
// we do not want it to trigger while downloading the current set
// and there is no point in taking a position after the round is over
mTriggerTimer.cancel();
processExternalized(slotIndex, value);
// start timing next externalize from this point
mLastExternalize = mApp.getClock().now();
// perform cleanups
TxSetFramePtr externalizedSet =
mPendingEnvelopes.getTxSet(value.txSetHash);
updateTransactionQueue(externalizedSet->mTransactions);
// Evict slots that are outside of our ledger validity bracket
auto minSlotToRemember = getMinLedgerSeqToRemember();
if (minSlotToRemember > LedgerManager::GENESIS_LEDGER_SEQ)
{
getHerderSCPDriver().purgeSlots(minSlotToRemember);
mPendingEnvelopes.eraseBelow(minSlotToRemember);
}
ledgerClosed(false);
// Check to see if quorums have changed and we need to reanalyze.
checkAndMaybeReanalyzeQuorumMap();
// heart beat *after* doing all the work (ensures that we do not include
// the overhead of externalization in the way we track SCP)
trackingHeartBeat();
}
else
{
processExternalized(slotIndex, value);
}
}
void
HerderImpl::rebroadcast()
{
ZoneScoped;
auto const& lcl = mLedgerManager.getLastClosedLedgerHeader().header;
for (auto const& e : getSCP().getLatestMessagesSend(lcl.ledgerSeq + 1))
{
broadcast(e);
}
if (!mHerderSCPDriver.trackingSCP())
{
getMoreSCPState();
}
startRebroadcastTimer();
}
void
HerderImpl::broadcast(SCPEnvelope const& e)
{
ZoneScoped;
if (!mApp.getConfig().MANUAL_CLOSE)
{
StellarMessage m;
m.type(SCP_MESSAGE);
m.envelope() = e;
CLOG(DEBUG, "Herder") << "broadcast "
<< " s:" << e.statement.pledges.type()
<< " i:" << e.statement.slotIndex;
mSCPMetrics.mEnvelopeEmit.Mark();
mApp.getOverlayManager().broadcastMessage(m, true);
}
}
void
HerderImpl::startRebroadcastTimer()
{
mRebroadcastTimer.expires_from_now(std::chrono::seconds(2));
mRebroadcastTimer.async_wait(std::bind(&HerderImpl::rebroadcast, this),
&VirtualTimer::onFailureNoop);
}
void
HerderImpl::emitEnvelope(SCPEnvelope const& envelope)
{
ZoneScoped;
uint64 slotIndex = envelope.statement.slotIndex;
if (Logging::logDebug("Herder"))
CLOG(DEBUG, "Herder")
<< "emitEnvelope"
<< " s:" << envelope.statement.pledges.type() << " i:" << slotIndex
<< " a:" << mApp.getStateHuman();
persistSCPState(slotIndex);
broadcast(envelope);
// this resets the re-broadcast timer
startRebroadcastTimer();
}
TransactionQueue::AddResult
HerderImpl::recvTransaction(TransactionFrameBasePtr tx)
{
ZoneScoped;
auto result = mTransactionQueue.tryAdd(tx);
if (result == TransactionQueue::AddResult::ADD_STATUS_PENDING)
{
if (Logging::logTrace("Herder"))
CLOG(TRACE, "Herder")
<< "recv transaction " << hexAbbrev(tx->getFullHash())
<< " for " << KeyUtils::toShortString(tx->getSourceID());
}
return result;
}
bool
HerderImpl::checkCloseTime(SCPEnvelope const& envelope, bool enforceRecent)
{
ZoneScoped;
using std::placeholders::_1;
auto const& st = envelope.statement;
uint64_t ctCutoff = 0;
if (enforceRecent)
{
ctCutoff = VirtualClock::to_time_t(mApp.getClock().system_now());
if (ctCutoff >= mApp.getConfig().MAXIMUM_LEDGER_CLOSETIME_DRIFT)
{
ctCutoff -= mApp.getConfig().MAXIMUM_LEDGER_CLOSETIME_DRIFT;
}
}
auto envLedgerIndex = envelope.statement.slotIndex;
auto& scpD = getHerderSCPDriver();
auto const& lcl = mLedgerManager.getLastClosedLedgerHeader().header;
auto lastCloseIndex = lcl.ledgerSeq;
auto lastCloseTime = lcl.scpValue.closeTime;
// see if we can get a better estimate of lastCloseTime for validating this
// statement using consensus data:
// update lastCloseIndex/lastCloseTime to be the highest possible but still
// be less than envLedgerIndex
auto adjustLastCloseTime = [&](HerderSCPDriver::ConsensusData const* cd) {
if (cd && envLedgerIndex >= cd->mConsensusIndex &&
cd->mConsensusIndex > lastCloseIndex)
{
lastCloseIndex = static_cast<uint32>(cd->mConsensusIndex);
lastCloseTime = cd->mConsensusValue.closeTime;
}
};
adjustLastCloseTime(mHerderSCPDriver.trackingSCP());
adjustLastCloseTime(mHerderSCPDriver.lastTrackingSCP());
StellarValue sv;
// performs the most conservative check:
// returns true if one of the values is valid
auto checkCTHelper = [&](std::vector<Value> const& values) {
return std::any_of(values.begin(), values.end(), [&](Value const& e) {
auto r = scpD.toStellarValue(e, sv);
// sv must be after cutoff
r = r && sv.closeTime >= ctCutoff;
if (r)
{
// statement received after the fact, only keep externalized
// value
r = (lastCloseIndex == envLedgerIndex &&
lastCloseTime == sv.closeTime);
// for older messages, just ensure that they occurred before
r = r || (lastCloseIndex > envLedgerIndex &&
lastCloseTime > sv.closeTime);
// for future message, perform the same validity check than
// within SCP
r = r || scpD.checkCloseTime(envLedgerIndex, lastCloseTime, sv);
}
return r;
});
};
bool b;
switch (st.pledges.type())
{
case SCP_ST_NOMINATE:
b = checkCTHelper(st.pledges.nominate().accepted) ||
checkCTHelper(st.pledges.nominate().votes);
break;
case SCP_ST_PREPARE:
{
auto& prep = st.pledges.prepare();
b = checkCTHelper({prep.ballot.value});
if (!b && prep.prepared)
{
b = checkCTHelper({prep.prepared->value});
}
if (!b && prep.preparedPrime)
{
b = checkCTHelper({prep.preparedPrime->value});
}
}
break;
case SCP_ST_CONFIRM:
b = checkCTHelper({st.pledges.confirm().ballot.value});
break;
case SCP_ST_EXTERNALIZE:
b = checkCTHelper({st.pledges.externalize().commit.value});
break;
default:
abort();
}
if (!b && Logging::logTrace("Herder"))
{
CLOG(TRACE, "Herder")
<< "Invalid close time processing " << getSCP().envToStr(st);
}
return b;
}
uint32_t
HerderImpl::getMinLedgerSeqToRemember()
{
auto maxSlotsToRemember = mApp.getConfig().MAX_SLOTS_TO_REMEMBER;
auto currSlot = getCurrentLedgerSeq();
if (currSlot > maxSlotsToRemember)
{
return (currSlot - maxSlotsToRemember + 1);
}
else
{
return LedgerManager::GENESIS_LEDGER_SEQ;
}
}
Herder::EnvelopeStatus
HerderImpl::recvSCPEnvelope(SCPEnvelope const& envelope)
{
ZoneScoped;
if (mApp.getConfig().MANUAL_CLOSE)
{
return Herder::ENVELOPE_STATUS_DISCARDED;
}
if (!verifyEnvelope(envelope))
{
std::string txt("DISCARDED - bad envelope");
ZoneText(txt.c_str(), txt.size());
CLOG(TRACE, "Herder") << "Received bad envelope, discarding";
return Herder::ENVELOPE_STATUS_DISCARDED;
}
mSCPMetrics.mEnvelopeReceive.Mark();
uint32_t minLedgerSeq = getMinLedgerSeqToRemember();
uint32_t maxLedgerSeq = std::numeric_limits<uint32>::max();
if (!checkCloseTime(envelope, false))
{
// if the envelope contains an invalid close time, don't bother
// processing it as we're not going to forward it anyways and it's
// going to just sit in our SCP state not contributing anything useful.
CLOG(TRACE, "Herder")
<< "skipping invalid close time (incompatible with current state)";
std::string txt("DISCARDED - incompatible close time");
ZoneText(txt.c_str(), txt.size());
return Herder::ENVELOPE_STATUS_DISCARDED;
}
if (mHerderSCPDriver.trackingSCP())
{
// when tracking, we can filter messages based on the information we got
// from consensus for the max ledger
// note that this filtering will cause a node on startup
// to potentially drop messages outside of the bracket
// causing it to discard CONSENSUS_STUCK_TIMEOUT_SECONDS worth of
// ledger closing
maxLedgerSeq = mHerderSCPDriver.nextConsensusLedgerIndex() +
LEDGER_VALIDITY_BRACKET;
}
else if (!checkCloseTime(envelope,
minLedgerSeq <= LedgerManager::GENESIS_LEDGER_SEQ))
{
// if we've never been in sync, we can be more aggressive in how we
// filter messages: we can ignore messages that are unlikely to be
// the latest messages from the network
CLOG(TRACE, "Herder") << "recvSCPEnvelope: skipping invalid close time "
"(check MAXIMUM_LEDGER_CLOSETIME_DRIFT)";
std::string txt("DISCARDED - invalid close time");
ZoneText(txt.c_str(), txt.size());
return Herder::ENVELOPE_STATUS_DISCARDED;
}
// If envelopes are out of our validity brackets, we just ignore them.
if (envelope.statement.slotIndex > maxLedgerSeq ||
envelope.statement.slotIndex < minLedgerSeq)
{
CLOG(TRACE, "Herder") << "Ignoring SCPEnvelope outside of range: "
<< envelope.statement.slotIndex << "( "
<< minLedgerSeq << "," << maxLedgerSeq << ")";
std::string txt("DISCARDED - out of range");
ZoneText(txt.c_str(), txt.size());
return Herder::ENVELOPE_STATUS_DISCARDED;
}
if (envelope.statement.nodeID == getSCP().getLocalNode()->getNodeID())
{
CLOG(TRACE, "Herder") << "recvSCPEnvelope: skipping own message";
std::string txt("SKIPPED_SELF");
ZoneText(txt.c_str(), txt.size());
return Herder::ENVELOPE_STATUS_SKIPPED_SELF;
}
auto status = mPendingEnvelopes.recvSCPEnvelope(envelope);
if (status == Herder::ENVELOPE_STATUS_READY)
{
std::string txt("READY");
ZoneText(txt.c_str(), txt.size());
if (Logging::logDebug("Herder"))
{
CLOG(DEBUG, "Herder")
<< "recvSCPEnvelope (ready) from: "
<< mApp.getConfig().toShortString(envelope.statement.nodeID)
<< " s:" << envelope.statement.pledges.type()
<< " i:" << envelope.statement.slotIndex
<< " a:" << mApp.getStateHuman();
}
processSCPQueue();
}
else
{
if (status == Herder::ENVELOPE_STATUS_FETCHING)
{
std::string txt("FETCHING");
ZoneText(txt.c_str(), txt.size());
}
else if (status == Herder::ENVELOPE_STATUS_PROCESSED)
{
std::string txt("PROCESSED");
ZoneText(txt.c_str(), txt.size());
}
if (Logging::logTrace("Herder"))
{
CLOG(TRACE, "Herder")
<< "recvSCPEnvelope (" << status << ") from: "
<< mApp.getConfig().toShortString(envelope.statement.nodeID)
<< " s:" << envelope.statement.pledges.type()
<< " i:" << envelope.statement.slotIndex
<< " a:" << mApp.getStateHuman();
}
}
return status;
}
Herder::EnvelopeStatus
HerderImpl::recvSCPEnvelope(SCPEnvelope const& envelope,
const SCPQuorumSet& qset, TxSetFrame txset)
{
ZoneScoped;
mPendingEnvelopes.addTxSet(txset.getContentsHash(),
envelope.statement.slotIndex,
std::make_shared<TxSetFrame>(txset));
mPendingEnvelopes.addSCPQuorumSet(sha256(xdr::xdr_to_opaque(qset)), qset);
return recvSCPEnvelope(envelope);
}
void
HerderImpl::sendSCPStateToPeer(uint32 ledgerSeq, Peer::pointer peer)
{
ZoneScoped;
bool log = true;
getSCP().processSlotsAscendingFrom(ledgerSeq, [&](uint64 seq) {
getSCP().processCurrentState(seq,
[&](SCPEnvelope const& e) {
StellarMessage m;
m.type(SCP_MESSAGE);
m.envelope() = e;
peer->sendMessage(m, log);
log = false;
return true;
},
false);
return true;
});
}
void
HerderImpl::processSCPQueue()
{
ZoneScoped;
if (mHerderSCPDriver.trackingSCP())
{
std::string txt("tracking");
ZoneText(txt.c_str(), txt.size());
processSCPQueueUpToIndex(mHerderSCPDriver.nextConsensusLedgerIndex());
}
else
{
std::string txt("not tracking");
ZoneText(txt.c_str(), txt.size());
// we don't know which ledger we're in
// try to consume the messages from the queue
// starting from the smallest slot
for (auto& slot : mPendingEnvelopes.readySlots())
{
processSCPQueueUpToIndex(slot);
if (mHerderSCPDriver.trackingSCP())
{
// one of the slots externalized
// we go back to regular flow
break;
}
}
}
}
void
HerderImpl::processSCPQueueUpToIndex(uint64 slotIndex)
{
ZoneScoped;
while (true)
{
SCPEnvelopeWrapperPtr envW = mPendingEnvelopes.pop(slotIndex);
if (envW)
{
auto r = getSCP().receiveEnvelope(envW);
if (r == SCP::EnvelopeState::VALID)
{
auto const& env = envW->getEnvelope();
auto const& st = env.statement;
if (st.pledges.type() == SCP_ST_EXTERNALIZE)
{
mHerderSCPDriver.recordSCPExternalizeEvent(
st.slotIndex, st.nodeID, false);
}
mPendingEnvelopes.envelopeProcessed(env);
}
}
else
{
return;
}
}
}
#ifdef BUILD_TESTS
PendingEnvelopes&
HerderImpl::getPendingEnvelopes()
{
return mPendingEnvelopes;
}
TransactionQueue&
HerderImpl::getTransactionQueue()
{
return mTransactionQueue;
}
#endif
void
HerderImpl::ledgerClosed(bool synchronous)
{
// this method is triggered every time the most recent ledger is
// externalized it performs some cleanup and also decides if it needs to
// schedule triggering the next ledger
ZoneScoped;
mTriggerTimer.cancel();
CLOG(TRACE, "Herder") << "HerderImpl::ledgerClosed";
auto lastIndex = mHerderSCPDriver.lastConsensusLedgerIndex();
uint64_t nextIndex = mHerderSCPDriver.nextConsensusLedgerIndex();
mPendingEnvelopes.slotClosed(lastIndex);
mApp.getOverlayManager().ledgerClosed(lastIndex);
if (mLedgerManager.isSynced())
{
// if we're in sync, we setup mTriggerTimer
// it may get cancelled if a more recent ledger externalizes
auto seconds = mApp.getConfig().getExpectedLedgerCloseTime();
// bootstrap with a pessimistic estimate of when
// the ballot protocol started last
auto lastBallotStart = mApp.getClock().now() - seconds;
auto lastStart = mHerderSCPDriver.getPrepareStart(lastIndex);
if (lastStart)
{
lastBallotStart = *lastStart;
}
// even if ballot protocol started before triggering, we just use that
// time as reference point for triggering again (this may trigger right
// away if externalizing took a long time)
mTriggerTimer.expires_at(lastBallotStart + seconds);
if (!mApp.getConfig().MANUAL_CLOSE)
mTriggerTimer.async_wait(
std::bind(&HerderImpl::triggerNextLedger, this,
static_cast<uint32_t>(nextIndex)),
&VirtualTimer::onFailureNoop);
}
else
{
CLOG(DEBUG, "Herder")
<< "Not presently synced, not triggering ledger-close.";
}
// process any statements up to the next slot
// this may cause it to externalize
auto processSCPQueueSomeMore = [this, nextIndex]() {
if (mApp.isStopping())
{
return;
}
processSCPQueueUpToIndex(nextIndex);
};
if (synchronous)
{
processSCPQueueSomeMore();
}
else
{
mApp.postOnMainThread(processSCPQueueSomeMore,
"processSCPQueueSomeMore");
}
}
bool
HerderImpl::recvSCPQuorumSet(Hash const& hash, const SCPQuorumSet& qset)
{
ZoneScoped;
return mPendingEnvelopes.recvSCPQuorumSet(hash, qset);
}
bool
HerderImpl::recvTxSet(Hash const& hash, const TxSetFrame& t)
{
ZoneScoped;
auto txset = std::make_shared<TxSetFrame>(t);
return mPendingEnvelopes.recvTxSet(hash, txset);
}
void
HerderImpl::peerDoesntHave(MessageType type, uint256 const& itemID,
Peer::pointer peer)
{
ZoneScoped;
mPendingEnvelopes.peerDoesntHave(type, itemID, peer);
}
TxSetFramePtr
HerderImpl::getTxSet(Hash const& hash)
{
return mPendingEnvelopes.getTxSet(hash);
}
SCPQuorumSetPtr
HerderImpl::getQSet(Hash const& qSetHash)
{
return mHerderSCPDriver.getQSet(qSetHash);
}
uint32_t
HerderImpl::getCurrentLedgerSeq() const
{
uint32_t res = mLedgerManager.getLastClosedLedgerNum();
if (mHerderSCPDriver.trackingSCP() &&
res < mHerderSCPDriver.trackingSCP()->mConsensusIndex)
{
res = static_cast<uint32_t>(
mHerderSCPDriver.trackingSCP()->mConsensusIndex);
}
if (mHerderSCPDriver.lastTrackingSCP() &&
res < mHerderSCPDriver.lastTrackingSCP()->mConsensusIndex)
{
res = static_cast<uint32_t>(
mHerderSCPDriver.lastTrackingSCP()->mConsensusIndex);
}
return res;
}
SequenceNumber
HerderImpl::getMaxSeqInPendingTxs(AccountID const& acc)
{
return mTransactionQueue.getAccountTransactionQueueInfo(acc).mMaxSeq;
}
// called to take a position during the next round
// uses the state in LedgerManager to derive a starting position
void
HerderImpl::triggerNextLedger(uint32_t ledgerSeqToTrigger)
{
ZoneScoped;
ZoneValue(static_cast<int64_t>(ledgerSeqToTrigger));
if (!mHerderSCPDriver.trackingSCP() || !mLedgerManager.isSynced())
{
CLOG(DEBUG, "Herder") << "triggerNextLedger: skipping (out of sync) : "
<< mApp.getStateHuman();
return;
}
// our first choice for this round's set is all the tx we have collected
// during last few ledger closes
auto const& lcl = mLedgerManager.getLastClosedLedgerHeader();
auto proposedSet = mTransactionQueue.toTxSet(lcl);
auto upperBoundCloseTimeOffset =
getUpperBoundCloseTimeOffset(mApp, lcl.header.scpValue.closeTime);
auto removed = proposedSet->trimInvalid(mApp, upperBoundCloseTimeOffset);
mTransactionQueue.ban(removed);
proposedSet->surgePricingFilter(mApp);
// we not only check that the value is valid for consensus (offset=0) but
// also that we performed the proper cleanup above
if (!proposedSet->checkValid(mApp, upperBoundCloseTimeOffset))
{
throw std::runtime_error("wanting to emit an invalid txSet");
}
auto txSetHash = proposedSet->getContentsHash();
// use the slot index from ledger manager here as our vote is based off
// the last closed ledger stored in ledger manager
uint32_t slotIndex = lcl.header.ledgerSeq + 1;
// Inform the item fetcher so queries from other peers about his txSet
// can be answered. Note this can trigger SCP callbacks, externalize, etc
// if we happen to build a txset that we were trying to download.
mPendingEnvelopes.addTxSet(txSetHash, slotIndex, proposedSet);
// no point in sending out a prepare:
// externalize was triggered on a more recent ledger
if (ledgerSeqToTrigger != slotIndex)
{
return;
}
// We pick as next close time the current time unless it's before the last
// close time. We don't know how much time it will take to reach consensus
// so this is the most appropriate value to use as closeTime.
uint64_t nextCloseTime =
VirtualClock::to_time_t(mApp.getClock().system_now());
if (nextCloseTime <= lcl.header.scpValue.closeTime)
{
nextCloseTime = lcl.header.scpValue.closeTime + 1;
}
StellarValue newProposedValue(txSetHash, nextCloseTime, emptyUpgradeSteps,
STELLAR_VALUE_BASIC);
// see if we need to include some upgrades
auto upgrades = mUpgrades.createUpgradesFor(lcl.header);
for (auto const& upgrade : upgrades)
{
Value v(xdr::xdr_to_opaque(upgrade));
if (v.size() >= UpgradeType::max_size())
{
CLOG(ERROR, "Herder")
<< "HerderImpl::triggerNextLedger"
<< " exceeded size for upgrade step (got " << v.size()
<< " ) for upgrade type " << std::to_string(upgrade.type());
CLOG(ERROR, "Herder") << REPORT_INTERNAL_BUG;
}
else
{
newProposedValue.upgrades.emplace_back(v.begin(), v.end());
}
}
getHerderSCPDriver().recordSCPEvent(slotIndex, true);
// If we are not a validating node we stop here and don't start nomination
if (!getSCP().isValidator())
{
CLOG(DEBUG, "Herder")
<< "Non-validating node, skipping nomination (SCP).";
return;
}
if (lcl.header.ledgerVersion >= 11)
{
// version 11 and above require values to be signed during nomination
signStellarValue(mApp.getConfig().NODE_SEED, newProposedValue);
}
mHerderSCPDriver.nominate(slotIndex, newProposedValue, proposedSet,
lcl.header.scpValue);
}
void
HerderImpl::setUpgrades(Upgrades::UpgradeParameters const& upgrades)
{
mUpgrades.setParameters(upgrades, mApp.getConfig());
persistUpgrades();
auto desc = mUpgrades.toString();
if (!desc.empty())
{
auto message = fmt::format("Armed with network upgrades: {}", desc);
auto prev = mApp.getStatusManager().getStatusMessage(
StatusCategory::REQUIRES_UPGRADES);
if (prev != message)
{
CLOG(INFO, "Herder") << message;
mApp.getStatusManager().setStatusMessage(
StatusCategory::REQUIRES_UPGRADES, message);
}
}
else
{
CLOG(INFO, "Herder") << "Network upgrades cleared";
mApp.getStatusManager().removeStatusMessage(
StatusCategory::REQUIRES_UPGRADES);
}
}
std::string
HerderImpl::getUpgradesJson()
{
return mUpgrades.getParameters().toJson();
}
bool
HerderImpl::resolveNodeID(std::string const& s, PublicKey& retKey)
{
bool r = mApp.getConfig().resolveNodeID(s, retKey);
if (!r)
{
if (s.size() > 1 && s[0] == '@')
{
std::string arg = s.substr(1);
// go through SCP messages of the previous ledger
// (to increase the chances of finding the node)
uint32 seq = getCurrentLedgerSeq();
if (seq > 2)
{
seq--;
}
getSCP().processCurrentState(
seq,
[&](SCPEnvelope const& e) {
std::string curK = KeyUtils::toStrKey(e.statement.nodeID);
if (curK.compare(0, arg.size(), arg) == 0)
{
retKey = e.statement.nodeID;
r = true;
return false;
}
return true;
},
true);
}
}
return r;
}
Json::Value