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0825ac8ecc7e9fb8f3d9f3aa9e34144ea240802a
rippled/src/xrpld/app/ledger/detail/LedgerMaster.cpp
Pratik Mankawde 5ed32063f5 Merge branch 'pratik/otel-phase8-log-correlation' into pratik/otel-phase9-metric-gap-fill 
Resolve conflicts by keeping phase-9's getobject_* metric instrumentation
and applying develop's snake_case namespace rename (#7933) to it:
Resource:: -> resource::, Tuning:: -> tuning::, BuildInfo:: -> build_info::.
2026-08-05 15:54:33 +01:00

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#include <xrpld/app/ledger/LedgerMaster.h>
#include <xrpld/app/consensus/RCLValidations.h>
#include <xrpld/app/ledger/InboundLedger.h>
#include <xrpld/app/ledger/InboundLedgers.h>
#include <xrpld/app/ledger/LedgerPersistence.h>
#include <xrpld/app/ledger/LedgerReplay.h>
#include <xrpld/app/ledger/LedgerReplayer.h>
#include <xrpld/app/ledger/OpenLedger.h>
#include <xrpld/app/ledger/detail/LedgerSpanNames.h>
#include <xrpld/app/main/Application.h>
#include <xrpld/app/misc/SHAMapStore.h>
#include <xrpld/app/misc/Transaction.h>
#include <xrpld/app/misc/TxQ.h>
#include <xrpld/app/misc/ValidatorList.h>
#include <xrpld/core/Config.h>
#include <xrpld/core/TimeKeeper.h>
#include <xrpld/overlay/Overlay.h>
#include <xrpld/overlay/Peer.h>
#include <xrpld/rpc/detail/PathRequestManager.h>
#include <xrpld/telemetry/MetricsRegistry.h>
#include <xrpl/basics/Log.h>
#include <xrpl/basics/MathUtilities.h>
#include <xrpl/basics/RangeSet.h>
#include <xrpl/basics/Slice.h>
#include <xrpl/basics/UnorderedContainers.h>
#include <xrpl/basics/UptimeClock.h>
#include <xrpl/basics/base_uint.h>
#include <xrpl/basics/chrono.h>
#include <xrpl/basics/contract.h>
#include <xrpl/basics/safe_cast.h>
#include <xrpl/basics/scope.h>
#include <xrpl/beast/insight/Collector.h>
#include <xrpl/beast/utility/Journal.h>
#include <xrpl/beast/utility/Zero.h>
#include <xrpl/beast/utility/instrumentation.h>
#include <xrpl/core/Job.h>
#include <xrpl/json/json_value.h>
#include <xrpl/ledger/AmendmentTable.h>
#include <xrpl/ledger/Ledger.h>
#include <xrpl/ledger/OrderBookDB.h>
#include <xrpl/ledger/PendingSaves.h>
#include <xrpl/ledger/View.h>
#include <xrpl/nodestore/Database.h>
#include <xrpl/protocol/BuildInfo.h>
#include <xrpl/protocol/HashPrefix.h>
#include <xrpl/protocol/LedgerHeader.h>
#include <xrpl/protocol/Protocol.h>
#include <xrpl/protocol/RippleLedgerHash.h>
#include <xrpl/protocol/SField.h>
#include <xrpl/protocol/Serializer.h>
#include <xrpl/protocol/digest.h>
#include <xrpl/rdb/RelationalDatabase.h>
#include <xrpl/resource/Fees.h>
#include <xrpl/server/LoadFeeTrack.h>
#include <xrpl/server/NetworkOPs.h>
#include <xrpl/shamap/SHAMap.h>
#include <xrpl/shamap/SHAMapMissingNode.h>
#include <xrpl/shamap/SHAMapTreeNode.h>
#include <xrpl/telemetry/SpanGuard.h>
#include <xrpl/telemetry/SpanNames.h>
#include <boost/icl/concept/interval_set.hpp>
#include <xrpl.pb.h>
#include <algorithm>
#include <atomic>
#include <chrono>
#include <cstdint>
#include <cstdlib>
#include <exception>
#include <functional>
#include <iostream>
#include <iterator>
#include <map>
#include <memory>
#include <mutex>
#include <optional>
#include <ostream>
#include <sstream>
#include <utility>
#include <vector>
namespace xrpl {
// Don't catch up more than 100 ledgers (cannot exceed 256)
static constexpr int kMaxLedgerGap{100};
// Don't acquire history if ledger is too old
static constexpr std::chrono::minutes kMaxLedgerAgeAcquire{1};
// Don't acquire history if write load is too high
static constexpr int kMaxWriteLoadAcquire{8192};
// Helper function for LedgerMaster::doAdvance()
// Return true if candidateLedger should be fetched from the network.
static bool
shouldAcquire(
std::uint32_t const currentLedger,
std::uint32_t const ledgerHistory,
std::optional<LedgerIndex> const minimumOnline,
std::uint32_t const candidateLedger,
beast::Journal j)
{
bool const ret = [&]() {
// Fetch ledger if it may be the current ledger
if (candidateLedger >= currentLedger)
return true;
// Or if it is within our configured history range:
if (currentLedger - candidateLedger <= ledgerHistory)
return true;
// Or if greater than or equal to a specific minimum ledger.
// Do nothing if the minimum ledger to keep online is unknown.
return minimumOnline.has_value() && candidateLedger >= *minimumOnline;
}();
JLOG(j.trace()) << "Missing ledger " << candidateLedger << (ret ? " should" : " should NOT")
<< " be acquired";
return ret;
}
LedgerMaster::LedgerMaster(
Application& app,
Stopwatch& stopwatch,
beast::insight::Collector::ptr const& collector,
beast::Journal journal)
: app_(app)
, journal_(journal)
, ledgerHistory_(collector, app)
, standalone_(app_.config().standalone())
, fetchDepth_(app_.getSHAMapStore().clampFetchDepth(app_.config().fetchDepth))
, ledgerHistorySize_(app_.config().ledgerHistory)
, ledgerFetchSize_(app_.config().getValueFor(SizedItem::LedgerFetch))
, fetchPacks_(
"FetchPack",
65536,
std::chrono::seconds{45},
stopwatch,
app_.getJournal("TaggedCache"))
, stats_([this] { collectMetrics(); }, collector)
{
}
LedgerIndex
LedgerMaster::getCurrentLedgerIndex()
{
return app_.getOpenLedger().current()->header().seq;
}
LedgerIndex
LedgerMaster::getValidLedgerIndex()
{
return validLedgerSeq_;
}
bool
LedgerMaster::isCompatible(ReadView const& view, beast::Journal::Stream s, char const* reason)
{
auto validLedger = getValidatedLedger();
if (validLedger && !areCompatible(*validLedger, view, s, reason))
{
return false;
}
{
std::scoped_lock const sl(mutex_);
if ((lastValidLedger_.second != 0) &&
!areCompatible(lastValidLedger_.first, lastValidLedger_.second, view, s, reason))
{
return false;
}
}
return true;
}
std::chrono::seconds
LedgerMaster::getPublishedLedgerAge()
{
using namespace std::chrono_literals;
std::chrono::seconds const pubClose{pubLedgerClose_.load()};
if (pubClose == 0s)
{
JLOG(journal_.debug()) << "No published ledger";
return weeks{2};
}
std::chrono::seconds ret = app_.getTimeKeeper().closeTime().time_since_epoch();
ret -= pubClose;
ret = (ret > 0s) ? ret : 0s;
static std::chrono::seconds kLastRet = -1s;
if (ret != kLastRet)
{
JLOG(journal_.trace()) << "Published ledger age is " << ret.count();
kLastRet = ret;
}
return ret;
}
std::chrono::seconds
LedgerMaster::getValidatedLedgerAge()
{
using namespace std::chrono_literals;
std::chrono::seconds const valClose{validLedgerSign_.load()};
if (valClose == 0s)
{
JLOG(journal_.debug()) << "No validated ledger";
return weeks{2};
}
std::chrono::seconds ret = app_.getTimeKeeper().closeTime().time_since_epoch();
ret -= valClose;
ret = (ret > 0s) ? ret : 0s;
static std::chrono::seconds kLastRet = -1s;
if (ret != kLastRet)
{
JLOG(journal_.trace()) << "Validated ledger age is " << ret.count();
kLastRet = ret;
}
return ret;
}
bool
LedgerMaster::isCaughtUp(std::string& reason)
{
using namespace std::chrono_literals;
if (getPublishedLedgerAge() > 3min)
{
reason = "No recently-published ledger";
return false;
}
std::uint32_t const validClose = validLedgerSign_.load();
std::uint32_t const pubClose = pubLedgerClose_.load();
if ((validClose == 0u) || (pubClose == 0u))
{
reason = "No published ledger";
return false;
}
if (validClose > (pubClose + 90))
{
reason = "Published ledger lags validated ledger";
return false;
}
return true;
}
void
LedgerMaster::setValidLedger(std::shared_ptr<Ledger const> const& l)
{
std::vector<NetClock::time_point> times;
std::optional<uint256> consensusHash;
if (!standalone_)
{
auto validations = app_.getValidators().negativeUNLFilter(
app_.getValidations().getTrustedForLedger(l->header().hash, l->header().seq));
times.reserve(validations.size());
for (auto const& val : validations)
times.push_back(val->getSignTime());
if (!validations.empty())
consensusHash = validations.front()->getConsensusHash();
}
NetClock::time_point signTime;
if (!times.empty() && times.size() >= app_.getValidators().quorum())
{
// Calculate the sample median
std::ranges::sort(times);
auto const t0 = times[(times.size() - 1) / 2];
auto const t1 = times[times.size() / 2];
signTime = t0 + (t1 - t0) / 2;
}
else
{
signTime = l->header().closeTime;
}
validLedger_.set(l);
validLedgerSign_ = signTime.time_since_epoch().count();
XRPL_ASSERT(
validLedgerSeq_ || !app_.getMaxDisallowedLedger() ||
l->header().seq + maxLedgerDifference_ > app_.getMaxDisallowedLedger(),
"xrpl::LedgerMaster::setValidLedger : valid ledger sequence");
(void)maxLedgerDifference_;
validLedgerSeq_ = l->header().seq;
// Record the network-validated ledger for the agreement tracker so it
// can compare against our own validations.
if (auto* mr = app_.getMetricsRegistry())
mr->getValidationTracker().recordNetworkValidation(l->header().hash, l->header().seq);
app_.getOPs().updateLocalTx(*l);
app_.getSHAMapStore().onLedgerClosed(getValidatedLedger());
ledgerHistory_.validatedLedger(l, consensusHash);
app_.getAmendmentTable().doValidatedLedger(l);
if (!app_.getOPs().isBlocked())
{
if (app_.getAmendmentTable().hasUnsupportedEnabled())
{
JLOG(journal_.error()) << "One or more unsupported amendments "
"activated: server blocked.";
app_.getOPs().setAmendmentBlocked();
}
else if (!app_.getOPs().isAmendmentWarned() || l->isFlagLedger())
{
// Amendments can lose majority, so re-check periodically (every
// flag ledger), and clear the flag if appropriate. If an unknown
// amendment gains majority log a warning as soon as it's
// discovered, then again every flag ledger until the operator
// upgrades, the amendment loses majority, or the amendment goes
// live and the node gets blocked. Unlike being amendment blocked,
// this message may be logged more than once per session, because
// the node will otherwise function normally, and this gives
// operators an opportunity to see and resolve the warning.
if (auto const first = app_.getAmendmentTable().firstUnsupportedExpected())
{
JLOG(journal_.error()) << "One or more unsupported amendments "
"reached majority. Upgrade before "
<< to_string(*first)
<< " to prevent your server from "
"becoming amendment blocked.";
app_.getOPs().setAmendmentWarned();
}
else
{
app_.getOPs().clearAmendmentWarned();
}
}
}
}
void
LedgerMaster::setPubLedger(std::shared_ptr<Ledger const> const& l)
{
pubLedger_ = l;
pubLedgerClose_ = l->header().closeTime.time_since_epoch().count();
pubLedgerSeq_ = l->header().seq;
}
void
LedgerMaster::addHeldTransaction(std::shared_ptr<Transaction> const& transaction)
{
std::scoped_lock const ml(mutex_);
heldTransactions_.insert(transaction->getSTransaction());
}
// Validate a ledger's close time and sequence number if we're considering
// jumping to that ledger. This helps defend against some rare hostile or
// diverged majority scenarios.
bool
LedgerMaster::canBeCurrent(std::shared_ptr<Ledger const> const& ledger)
{
XRPL_ASSERT(ledger, "xrpl::LedgerMaster::canBeCurrent : non-null input");
// Never jump to a candidate ledger that precedes our
// last validated ledger
auto validLedger = getValidatedLedger();
if (validLedger && (ledger->header().seq < validLedger->header().seq))
{
JLOG(journal_.trace()) << "Candidate for current ledger has low seq "
<< ledger->header().seq << " < " << validLedger->header().seq;
return false;
}
// Ensure this ledger's parent close time is within five minutes of
// our current time. If we already have a known fully-valid ledger
// we perform this check. Otherwise, we only do it if we've built a
// few ledgers as our clock can be off when we first start up
auto closeTime = app_.getTimeKeeper().closeTime();
auto ledgerClose = ledger->header().parentCloseTime;
using namespace std::chrono_literals;
if ((validLedger || (ledger->header().seq > 10)) &&
((std::max(closeTime, ledgerClose) - std::min(closeTime, ledgerClose)) > 5min))
{
JLOG(journal_.warn()) << "Candidate for current ledger has close time "
<< to_string(ledgerClose) << " at network time "
<< to_string(closeTime) << " seq " << ledger->header().seq;
return false;
}
if (validLedger)
{
// Sequence number must not be too high. We allow ten ledgers
// for time inaccuracies plus a maximum run rate of one ledger
// every two seconds. The goal is to prevent a malicious ledger
// from increasing our sequence unreasonably high
LedgerIndex maxSeq = validLedger->header().seq + 10;
if (closeTime > validLedger->header().parentCloseTime)
{
maxSeq += std::chrono::duration_cast<std::chrono::seconds>(
closeTime - validLedger->header().parentCloseTime)
.count() /
2;
}
if (ledger->header().seq > maxSeq)
{
JLOG(journal_.warn()) << "Candidate for current ledger has high seq "
<< ledger->header().seq << " > " << maxSeq;
return false;
}
JLOG(journal_.trace()) << "Acceptable seq range: " << validLedger->header().seq
<< " <= " << ledger->header().seq << " <= " << maxSeq;
}
return true;
}
void
LedgerMaster::switchLCL(std::shared_ptr<Ledger const> const& lastClosed)
{
XRPL_ASSERT(lastClosed, "xrpl::LedgerMaster::switchLCL : non-null input");
if (!lastClosed->isImmutable())
logicError("mutable ledger in switchLCL");
if (lastClosed->open())
logicError("The new last closed ledger is open!");
{
std::scoped_lock const ml(mutex_);
closedLedger_.set(lastClosed);
}
if (standalone_)
{
setFullLedger(lastClosed, true, false);
tryAdvance();
}
else
{
checkAccept(lastClosed);
}
}
bool
LedgerMaster::fixIndex(LedgerIndex ledgerIndex, LedgerHash const& ledgerHash)
{
return ledgerHistory_.fixIndex(ledgerIndex, ledgerHash);
}
bool
LedgerMaster::storeLedger(std::shared_ptr<Ledger const> ledger)
{
using namespace telemetry;
auto span = SpanGuard::span(TraceCategory::Ledger, seg::ledger, ledger_span::op::store);
span.setAttribute(ledger_span::attr::ledgerSeq, static_cast<int64_t>(ledger->header().seq));
bool const validated = ledger->header().validated;
// Returns true if we already had the ledger
return ledgerHistory_.insert(ledger, validated);
}
/**
* Apply held transactions to the open ledger
* This is normally called as we close the ledger.
* The open ledger remains open to handle new transactions
* until a new open ledger is built.
*/
void
LedgerMaster::applyHeldTransactions()
{
CanonicalTXSet const set = [this]() {
std::scoped_lock const sl(mutex_);
// VFALCO NOTE The hash for an open ledger is undefined so we use
// something that is a reasonable substitute.
CanonicalTXSet set(app_.getOpenLedger().current()->header().parentHash);
std::swap(heldTransactions_, set);
return set;
}();
if (!set.empty())
app_.getOPs().processTransactionSet(set);
}
std::shared_ptr<STTx const>
LedgerMaster::popAcctTransaction(std::shared_ptr<STTx const> const& tx)
{
std::scoped_lock const sl(mutex_);
return heldTransactions_.popAcctTransaction(tx);
}
void
LedgerMaster::setBuildingLedger(LedgerIndex i)
{
buildingLedgerSeq_.store(i);
}
bool
LedgerMaster::haveLedger(std::uint32_t seq)
{
std::scoped_lock const sl(completeLock_);
return boost::icl::contains(completeLedgers_, seq);
}
void
LedgerMaster::clearLedger(std::uint32_t seq)
{
std::scoped_lock const sl(completeLock_);
completeLedgers_.erase(seq);
}
bool
LedgerMaster::isValidated(ReadView const& ledger)
{
if (ledger.open())
return false;
if (ledger.header().validated)
return true;
auto const seq = ledger.header().seq;
try
{
// Use the skip list in the last validated ledger to see if ledger
// comes before the last validated ledger (and thus has been
// validated).
auto const hash = walkHashBySeq(seq, InboundLedger::Reason::GENERIC);
if (!hash || ledger.header().hash != *hash)
{
// This ledger's hash is not the hash of the validated ledger
if (hash)
{
XRPL_ASSERT(hash->isNonZero(), "xrpl::LedgerMaster::isValidated : nonzero hash");
uint256 const valHash = app_.getRelationalDatabase().getHashByIndex(seq);
if (valHash == ledger.header().hash)
{
// SQL database doesn't match ledger chain
clearLedger(seq);
}
}
return false;
}
}
catch (SHAMapMissingNode const& mn)
{
JLOG(journal_.warn()) << "Ledger #" << seq << ": " << mn.what();
return false;
}
// Mark ledger as validated to save time if we see it again.
ledger.header().validated = true;
return true;
}
// returns Ledgers we have all the nodes for
bool
LedgerMaster::getFullValidatedRange(std::uint32_t& minVal, std::uint32_t& maxVal)
{
// Validated ledger is likely not stored in the DB yet so we use the
// published ledger which is.
maxVal = pubLedgerSeq_.load();
if (maxVal == 0u)
return false;
std::optional<std::uint32_t> maybeMin;
{
std::scoped_lock const sl(completeLock_);
maybeMin = prevMissing(completeLedgers_, maxVal);
}
if (maybeMin == std::nullopt)
{
minVal = maxVal;
}
else
{
minVal = 1 + *maybeMin;
}
return true;
}
// Returns Ledgers we have all the nodes for and are indexed
bool
LedgerMaster::getValidatedRange(std::uint32_t& minVal, std::uint32_t& maxVal)
{
if (!getFullValidatedRange(minVal, maxVal))
return false;
// Remove from the validated range any ledger sequences that may not be
// fully updated in the database yet
auto const pendingSaves = app_.getPendingSaves().getSnapshot();
if (!pendingSaves.empty() && ((minVal != 0) || (maxVal != 0)))
{
// Ensure we shrink the tips as much as possible. If we have 7-9 and
// 8,9 are invalid, we don't want to see the 8 and shrink to just 9
// because then we'll have nothing when we could have 7.
while (pendingSaves.contains(maxVal))
--maxVal;
while (pendingSaves.contains(minVal))
++minVal;
// Best effort for remaining exclusions
for (auto v : pendingSaves)
{
if ((v.first >= minVal) && (v.first <= maxVal))
{
if (v.first > ((minVal + maxVal) / 2))
{
maxVal = v.first - 1;
}
else
{
minVal = v.first + 1;
}
}
}
if (minVal > maxVal)
minVal = maxVal = 0;
}
return true;
}
// Get the earliest ledger we will let peers fetch
std::uint32_t
LedgerMaster::getEarliestFetch()
{
// The earliest ledger we will let people fetch is ledger zero,
// unless that creates a larger range than allowed
std::uint32_t e = getClosedLedger()->header().seq;
if (e > fetchDepth_)
{
e -= fetchDepth_;
}
else
{
e = 0;
}
return e;
}
void
LedgerMaster::tryFill(std::shared_ptr<Ledger const> ledger)
{
std::uint32_t seq = ledger->header().seq;
uint256 prevHash = ledger->header().parentHash;
std::map<std::uint32_t, LedgerHashPair> ledgerHashes;
std::uint32_t minHas = seq;
std::uint32_t maxHas = seq;
node_store::Database& nodeStore{app_.getNodeStore()};
while (!app_.getJobQueue().isStopping() && seq > 0)
{
{
std::scoped_lock const ml(mutex_);
minHas = seq;
--seq;
if (haveLedger(seq))
break;
}
auto it(ledgerHashes.find(seq));
if (it == ledgerHashes.end())
{
if (app_.isStopping())
return;
{
std::scoped_lock const ml(completeLock_);
completeLedgers_.insert(range(minHas, maxHas));
}
maxHas = minHas;
ledgerHashes =
app_.getRelationalDatabase().getHashesByIndex((seq < 500) ? 0 : (seq - 499), seq);
it = ledgerHashes.find(seq);
if (it == ledgerHashes.end())
break;
if (!nodeStore.fetchNodeObject(
ledgerHashes.begin()->second.ledgerHash, ledgerHashes.begin()->first))
{
// The ledger is not backed by the node store
JLOG(journal_.warn())
<< "SQL DB ledger sequence " << seq << " mismatches node store";
break;
}
}
if (it->second.ledgerHash != prevHash)
break;
prevHash = it->second.parentHash;
}
{
std::scoped_lock const ml(completeLock_);
completeLedgers_.insert(range(minHas, maxHas));
}
{
std::scoped_lock const ml(mutex_);
fillInProgress_ = 0;
tryAdvance();
}
}
/**
* Request a fetch pack to get to the specified ledger
*/
void
LedgerMaster::getFetchPack(LedgerIndex missing, InboundLedger::Reason reason)
{
LedgerIndex const ledgerIndex = missing + 1;
auto const haveHash{getLedgerHashForHistory(ledgerIndex, reason)};
if (!haveHash || haveHash->isZero())
{
JLOG(journal_.error()) << "No hash for fetch pack. Missing Index " << missing;
return;
}
// Select target Peer based on highest score. The score is randomized
// but biased in favor of Peers with low latency.
std::shared_ptr<Peer> target;
{
int maxScore = 0;
auto peerList = app_.getOverlay().getActivePeers();
for (auto const& peer : peerList)
{
if (peer->hasRange(missing, missing + 1))
{
int const score = peer->getScore(true);
if (!target || (score > maxScore))
{
target = peer;
maxScore = score;
}
}
}
}
if (target)
{
protocol::TMGetObjectByHash tmBH;
tmBH.set_query(true);
tmBH.set_type(protocol::TMGetObjectByHash::otFETCH_PACK);
tmBH.set_ledgerhash(haveHash->begin(), 32);
auto packet = std::make_shared<Message>(tmBH, protocol::mtGET_OBJECTS);
target->send(packet);
JLOG(journal_.trace()) << "Requested fetch pack for " << missing;
}
else
{
JLOG(journal_.debug()) << "No peer for fetch pack";
}
}
void
LedgerMaster::fixMismatch(ReadView const& ledger)
{
int invalidate = 0;
std::optional<uint256> hash;
for (std::uint32_t lSeq = ledger.header().seq - 1; lSeq > 0; --lSeq)
{
if (haveLedger(lSeq))
{
try
{
hash = hashOfSeq(ledger, lSeq, journal_);
}
catch (std::exception const& ex)
{
JLOG(journal_.warn())
<< "fixMismatch encounters partial ledger. Exception: " << ex.what();
clearLedger(lSeq);
return;
}
if (hash)
{
// try to close the seam
auto otherLedger = getLedgerBySeq(lSeq);
if (otherLedger && (otherLedger->header().hash == *hash))
{
// we closed the seam
if (invalidate != 0)
{
JLOG(journal_.warn()) << "Match at " << lSeq << ", " << invalidate
<< " prior ledgers invalidated";
}
return;
}
}
clearLedger(lSeq);
++invalidate;
}
}
// all prior ledgers invalidated
if (invalidate != 0)
{
JLOG(journal_.warn()) << "All " << invalidate << " prior ledgers invalidated";
}
}
void
LedgerMaster::setFullLedger(
std::shared_ptr<Ledger const> const& ledger,
bool isSynchronous,
bool isCurrent)
{
// A new ledger has been accepted as part of the trusted chain
JLOG(journal_.debug()) << "Ledger " << ledger->header().seq
<< " accepted :" << ledger->header().hash;
XRPL_ASSERT(
ledger->stateMap().getHash().isNonZero(),
"xrpl::LedgerMaster::setFullLedger : nonzero ledger state hash");
ledger->setValidated();
ledger->setFull();
if (isCurrent)
ledgerHistory_.insert(ledger, true);
{
// Check the SQL database's entry for the sequence before this
// ledger, if it's not this ledger's parent, invalidate it
uint256 const prevHash =
app_.getRelationalDatabase().getHashByIndex(ledger->header().seq - 1);
if (prevHash.isNonZero() && prevHash != ledger->header().parentHash)
clearLedger(ledger->header().seq - 1);
}
pendSaveValidated(app_, ledger, isSynchronous, isCurrent);
{
std::scoped_lock const ml(completeLock_);
completeLedgers_.insert(ledger->header().seq);
}
{
std::scoped_lock const ml(mutex_);
if (ledger->header().seq > validLedgerSeq_)
setValidLedger(ledger);
if (!pubLedger_)
{
setPubLedger(ledger);
app_.getOrderBookDB().setup(ledger);
}
if (ledger->header().seq != 0 && haveLedger(ledger->header().seq - 1))
{
// we think we have the previous ledger, double check
auto prevLedger = getLedgerBySeq(ledger->header().seq - 1);
if (!prevLedger || (prevLedger->header().hash != ledger->header().parentHash))
{
JLOG(journal_.warn()) << "Acquired ledger invalidates previous ledger: "
<< (prevLedger ? "hashMismatch" : "missingLedger");
fixMismatch(*ledger);
}
}
}
}
void
LedgerMaster::failedSave(std::uint32_t seq, uint256 const& hash)
{
clearLedger(seq);
app_.getInboundLedgers().acquire(hash, seq, InboundLedger::Reason::GENERIC);
}
// Check if the specified ledger can become the new last fully-validated
// ledger.
void
LedgerMaster::checkAccept(uint256 const& hash, std::uint32_t seq)
{
std::size_t valCount = 0;
if (seq != 0)
{
// Ledger is too old
if (seq < validLedgerSeq_)
return;
auto validations = app_.getValidators().negativeUNLFilter(
app_.getValidations().getTrustedForLedger(hash, seq));
valCount = validations.size();
if (valCount >= app_.getValidators().quorum())
{
std::scoped_lock const ml(mutex_);
if (seq > lastValidLedger_.second)
lastValidLedger_ = std::make_pair(hash, seq);
}
if (seq == validLedgerSeq_)
return;
// Ledger could match the ledger we're already building
if (seq == buildingLedgerSeq_)
return;
}
auto ledger = ledgerHistory_.getLedgerByHash(hash);
if (!ledger)
{
if ((seq != 0) && (getValidLedgerIndex() == 0))
{
// Set peers converged early if we can
if (valCount >= app_.getValidators().quorum())
app_.getOverlay().checkTracking(seq);
}
// FIXME: We may not want to fetch a ledger with just one
// trusted validation
ledger = app_.getInboundLedgers().acquire(hash, seq, InboundLedger::Reason::GENERIC);
}
if (ledger)
checkAccept(ledger);
}
/**
* Determines how many validations are needed to fully validate a ledger
*
* @return Number of validations needed
*/
std::size_t
LedgerMaster::getNeededValidations()
{
return standalone_ ? 0 : app_.getValidators().quorum();
}
void
LedgerMaster::checkAccept(std::shared_ptr<Ledger const> const& ledger)
{
// Can we accept this ledger as our new last fully-validated ledger
if (!canBeCurrent(ledger))
return;
// Can we advance the last fully-validated ledger? If so, can we
// publish?
std::scoped_lock const ml(mutex_);
if (ledger->header().seq <= validLedgerSeq_)
return;
auto const minVal = getNeededValidations();
auto validations = app_.getValidators().negativeUNLFilter(
app_.getValidations().getTrustedForLedger(ledger->header().hash, ledger->header().seq));
auto const tvc = validations.size();
if (tvc < minVal) // nothing we can do
{
JLOG(journal_.trace()) << "Only " << tvc << " validations for " << ledger->header().hash;
return;
}
using namespace telemetry;
auto valSpan = SpanGuard::span(TraceCategory::Ledger, seg::ledger, ledger_span::op::validate);
valSpan.setAttribute(ledger_span::attr::ledgerSeq, static_cast<int64_t>(ledger->header().seq));
valSpan.setAttribute(ledger_span::attr::validations, static_cast<int64_t>(tvc));
JLOG(journal_.info()) << "Advancing accepted ledger to " << ledger->header().seq
<< " with >= " << minVal << " validations";
ledger->setValidated();
ledger->setFull();
setValidLedger(ledger);
if (!pubLedger_)
{
pendSaveValidated(app_, ledger, true, true);
setPubLedger(ledger);
app_.getOrderBookDB().setup(ledger);
}
std::uint32_t const base = app_.getFeeTrack().getLoadBase();
auto fees = app_.getValidations().fees(ledger->header().hash, base);
{
auto fees2 = app_.getValidations().fees(ledger->header().parentHash, base);
fees.reserve(fees.size() + fees2.size());
std::ranges::copy(fees2, std::back_inserter(fees));
}
std::uint32_t fee = 0;
if (!fees.empty())
{
std::ranges::sort(fees);
if (auto stream = journal_.debug())
{
std::stringstream s;
s << "Received fees from validations: (" << fees.size() << ") ";
for (auto const fee1 : fees)
{
s << " " << fee1;
}
stream << s.str();
}
fee = fees[fees.size() / 2]; // median
}
else
{
fee = base;
}
app_.getFeeTrack().setRemoteFee(fee);
tryAdvance();
if (ledger->seq() % 256 == 0)
{
// Check if the majority of validators run a higher version xrpld
// software. If so print a warning.
//
// Validators include their xrpld software version in the validation
// messages of every (flag - 1) ledger. We wait for one ledger time
// before checking the version information to accumulate more validation
// messages.
auto currentTime = app_.getTimeKeeper().now();
bool needPrint = false;
// The variable upgradeWarningPrevTime_ will be set when and only when
// the warning is printed.
if (upgradeWarningPrevTime_ == TimeKeeper::time_point())
{
// Have not printed the warning before, check if need to print.
auto const vals = app_.getValidations().getTrustedForLedger(
ledger->header().parentHash, ledger->header().seq - 1);
std::size_t higherVersionCount = 0;
std::size_t xrpldCount = 0;
for (auto const& v : vals)
{
if (v->isFieldPresent(sfServerVersion))
{
auto version = v->getFieldU64(sfServerVersion);
higherVersionCount += build_info::isNewerVersion(version) ? 1 : 0;
xrpldCount += build_info::isXrpldVersion(version) ? 1 : 0;
}
}
// We report only if (1) we have accumulated validation messages
// from 90% validators from the UNL, (2) 60% of validators
// running the xrpld implementation have higher version numbers,
// and (3) the calculation won't cause divide-by-zero.
if (higherVersionCount > 0 && xrpldCount > 0)
{
static constexpr std::size_t kReportingPercent = 90;
static constexpr std::size_t kCutoffPercent = 60;
auto const unlSize{app_.getValidators().getQuorumKeys().second.size()};
needPrint = unlSize > 0 &&
calculatePercent(vals.size(), unlSize) >= kReportingPercent &&
calculatePercent(higherVersionCount, xrpldCount) >= kCutoffPercent;
}
}
// To throttle the warning messages, instead of printing a warning
// every flag ledger, we print every week.
else if (currentTime - upgradeWarningPrevTime_ >= weeks{1})
{
// Printed the warning before, and assuming most validators
// do not downgrade, we keep printing the warning
// until the local server is restarted.
needPrint = true;
}
if (needPrint)
{
upgradeWarningPrevTime_ = currentTime;
auto const upgradeMsg =
"Check for upgrade: "
"A majority of trusted validators are "
"running a newer version.";
std::cerr << upgradeMsg << std::endl;
JLOG(journal_.error()) << upgradeMsg;
}
}
}
/**
* Report that the consensus process built a particular ledger
*/
void
LedgerMaster::consensusBuilt(
std::shared_ptr<Ledger const> const& ledger,
uint256 const& consensusHash,
json::Value consensus)
{
// Because we just built a ledger, we are no longer building one
setBuildingLedger(0);
// No need to process validations in standalone mode
if (standalone_)
return;
ledgerHistory_.builtLedger(ledger, consensusHash, std::move(consensus));
if (ledger->header().seq <= validLedgerSeq_)
{
auto stream = app_.getJournal("LedgerConsensus").info();
JLOG(stream) << "Consensus built old ledger: " << ledger->header().seq
<< " <= " << validLedgerSeq_;
return;
}
// See if this ledger can be the new fully-validated ledger
checkAccept(ledger);
if (ledger->header().seq <= validLedgerSeq_)
{
auto stream = app_.getJournal("LedgerConsensus").debug();
JLOG(stream) << "Consensus ledger fully validated";
return;
}
// This ledger cannot be the new fully-validated ledger, but
// maybe we saved up validations for some other ledger that can be
auto validations =
app_.getValidators().negativeUNLFilter(app_.getValidations().currentTrusted());
// Track validation counts with sequence numbers
class ValSeq
{
public:
ValSeq() = default;
void
mergeValidation(LedgerIndex seq)
{
valCount++;
// If we didn't already know the sequence, now we do
if (ledgerSeq == 0)
ledgerSeq = seq;
}
std::size_t valCount{0};
LedgerIndex ledgerSeq{0};
};
// Count the number of current, trusted validations
hash_map<uint256, ValSeq> count;
for (auto const& v : validations)
{
ValSeq& vs = count[v->getLedgerHash()];
vs.mergeValidation(v->getFieldU32(sfLedgerSequence));
}
auto const neededValidations = getNeededValidations();
auto maxSeq = validLedgerSeq_.load();
auto maxLedger = ledger->header().hash;
// Of the ledgers with sufficient validations,
// find the one with the highest sequence
for (auto& v : count)
{
if (v.second.valCount > neededValidations)
{
// If we still don't know the sequence, get it
if (v.second.ledgerSeq == 0)
{
if (auto l = getLedgerByHash(v.first))
v.second.ledgerSeq = l->header().seq;
}
if (v.second.ledgerSeq > maxSeq)
{
maxSeq = v.second.ledgerSeq;
maxLedger = v.first;
}
}
}
if (maxSeq > validLedgerSeq_)
{
auto stream = app_.getJournal("LedgerConsensus").debug();
JLOG(stream) << "Consensus triggered check of ledger";
checkAccept(maxLedger, maxSeq);
}
}
std::optional<LedgerHash>
LedgerMaster::getLedgerHashForHistory(LedgerIndex index, InboundLedger::Reason reason)
{
// Try to get the hash of a ledger we need to fetch for history
std::optional<LedgerHash> ret;
auto const& l{histLedger_};
if (l && l->header().seq >= index)
{
ret = hashOfSeq(*l, index, journal_);
if (!ret)
ret = walkHashBySeq(index, l, reason);
}
if (!ret)
ret = walkHashBySeq(index, reason);
return ret;
}
std::vector<std::shared_ptr<Ledger const>>
LedgerMaster::findNewLedgersToPublish(std::unique_lock<std::recursive_mutex>& sl)
{
std::vector<std::shared_ptr<Ledger const>> ret;
JLOG(journal_.trace()) << "findNewLedgersToPublish<";
// No valid ledger, nothing to do
if (validLedger_.empty())
{
JLOG(journal_.trace()) << "No valid journal, nothing to publish.";
return {};
}
if (!pubLedger_)
{
JLOG(journal_.info()) << "First published ledger will be " << validLedgerSeq_;
return {validLedger_.get()};
}
if (validLedgerSeq_ > (pubLedgerSeq_ + kMaxLedgerGap))
{
JLOG(journal_.warn()) << "Gap in validated ledger stream " << pubLedgerSeq_ << " - "
<< validLedgerSeq_ - 1;
auto valLedger = validLedger_.get();
ret.push_back(valLedger);
setPubLedger(valLedger);
app_.getOrderBookDB().setup(valLedger);
return {valLedger};
}
if (validLedgerSeq_ <= pubLedgerSeq_)
{
JLOG(journal_.trace()) << "No valid journal, nothing to publish.";
return {};
}
int acqCount = 0;
auto pubSeq = pubLedgerSeq_ + 1; // Next sequence to publish
auto valLedger = validLedger_.get();
std::uint32_t const valSeq = valLedger->header().seq;
ScopeUnlock const sul{sl};
try
{
for (std::uint32_t seq = pubSeq; seq <= valSeq; ++seq)
{
JLOG(journal_.trace()) << "Trying to fetch/publish valid ledger " << seq;
std::shared_ptr<Ledger const> ledger;
// This can throw
auto hash = hashOfSeq(*valLedger, seq, journal_);
// VFALCO TODO Restructure this code so that zero is not
// used.
if (!hash)
hash = beast::kZero; // kludge
if (seq == valSeq)
{
// We need to publish the ledger we just fully validated
ledger = valLedger;
}
else if (hash->isZero())
{
// LCOV_EXCL_START
JLOG(journal_.fatal()) << "Ledger: " << valSeq << " does not have hash for " << seq;
UNREACHABLE(
"xrpl::LedgerMaster::findNewLedgersToPublish : ledger "
"not found");
// LCOV_EXCL_STOP
}
else
{
ledger = ledgerHistory_.getLedgerByHash(*hash);
}
if (!app_.config().ledgerReplay)
{
// Can we try to acquire the ledger we need?
if (!ledger && (++acqCount < ledgerFetchSize_))
{
ledger = app_.getInboundLedgers().acquire(
*hash, seq, InboundLedger::Reason::GENERIC);
}
}
// Did we acquire the next ledger we need to publish?
if (ledger && (ledger->header().seq == pubSeq))
{
ledger->setValidated();
ret.push_back(ledger);
++pubSeq;
}
}
JLOG(journal_.trace()) << "ready to publish " << ret.size() << " ledgers.";
}
catch (std::exception const& ex)
{
JLOG(journal_.error()) << "Exception while trying to find ledgers to publish: "
<< ex.what();
}
if (app_.config().ledgerReplay)
{
/* Narrow down the gap of ledgers, and try to replay them.
* When replaying a ledger gap, if the local node has
* the start ledger, it saves an expensive InboundLedger
* acquire. If the local node has the finish ledger, it
* saves a skip list acquire.
*/
auto const& startLedger = ret.empty() ? pubLedger_ : ret.back();
auto finishLedger = valLedger;
while (startLedger->seq() + 1 < finishLedger->seq())
{
if (auto const parent =
ledgerHistory_.getLedgerByHash(finishLedger->header().parentHash);
parent)
{
finishLedger = parent;
}
else
{
auto numberLedgers = finishLedger->seq() - startLedger->seq() + 1;
JLOG(journal_.debug())
<< "Publish LedgerReplays " << numberLedgers
<< " ledgers, from seq=" << startLedger->header().seq << ", "
<< startLedger->header().hash << " to seq=" << finishLedger->header().seq
<< ", " << finishLedger->header().hash;
app_.getLedgerReplayer().replay(
InboundLedger::Reason::GENERIC, finishLedger->header().hash, numberLedgers);
break;
}
}
}
return ret;
}
void
LedgerMaster::tryAdvance()
{
std::scoped_lock const ml(mutex_);
// Can't advance without at least one fully-valid ledger
advanceWork_ = true;
if (!advanceThread_ && !validLedger_.empty())
{
advanceThread_ = true;
app_.getJobQueue().addJob(JtAdvance, "AdvanceLedger", [this]() {
std::unique_lock sl(mutex_);
XRPL_ASSERT(
!validLedger_.empty() && advanceThread_,
"xrpl::LedgerMaster::tryAdvance : has valid ledger");
JLOG(journal_.trace()) << "advanceThread<";
try
{
doAdvance(sl);
}
catch (std::exception const& ex)
{
JLOG(journal_.fatal()) << "doAdvance throws: " << ex.what();
}
advanceThread_ = false;
JLOG(journal_.trace()) << "advanceThread>";
});
}
}
void
LedgerMaster::updatePaths()
{
{
std::scoped_lock const ml(mutex_);
if (app_.getOPs().isNeedNetworkLedger())
{
--pathFindThread_;
pathLedger_.reset();
JLOG(journal_.debug()) << "Need network ledger for updating paths";
return;
}
}
while (!app_.getJobQueue().isStopping())
{
JLOG(journal_.debug()) << "updatePaths running";
std::shared_ptr<ReadView const> lastLedger;
{
std::scoped_lock const ml(mutex_);
if (!validLedger_.empty() &&
(!pathLedger_ || (pathLedger_->header().seq != validLedgerSeq_)))
{ // We have a new valid ledger since the last full pathfinding
pathLedger_ = validLedger_.get();
lastLedger = pathLedger_;
}
else if (pathFindNewRequest_)
{ // We have a new request but no new ledger
lastLedger = app_.getOpenLedger().current();
}
else
{ // Nothing to do
--pathFindThread_;
pathLedger_.reset();
JLOG(journal_.debug()) << "Nothing to do for updating paths";
return;
}
}
if (!standalone_)
{ // don't pathfind with a ledger that's more than 60 seconds old
using namespace std::chrono;
auto age = time_point_cast<seconds>(app_.getTimeKeeper().closeTime()) -
lastLedger->header().closeTime;
if (age > 1min)
{
JLOG(journal_.debug()) << "Published ledger too old for updating paths";
std::scoped_lock const ml(mutex_);
--pathFindThread_;
pathLedger_.reset();
return;
}
}
try
{
auto& pathRequests = app_.getPathRequestManager();
{
std::scoped_lock const ml(mutex_);
if (!pathRequests.requestsPending())
{
--pathFindThread_;
pathLedger_.reset();
JLOG(journal_.debug()) << "No path requests found. Nothing to do for updating "
"paths. "
<< pathFindThread_ << " jobs remaining";
return;
}
}
JLOG(journal_.debug()) << "Updating paths";
pathRequests.updateAll(lastLedger);
std::scoped_lock const ml(mutex_);
if (!pathRequests.requestsPending())
{
JLOG(journal_.debug()) << "No path requests left. No need for further updating "
"paths";
--pathFindThread_;
pathLedger_.reset();
return;
}
}
catch (SHAMapMissingNode const& mn)
{
JLOG(journal_.info()) << "During pathfinding: " << mn.what();
if (lastLedger->open())
{
// our parent is the problem
app_.getInboundLedgers().acquire(
lastLedger->header().parentHash,
lastLedger->header().seq - 1,
InboundLedger::Reason::GENERIC);
}
else
{
// this ledger is the problem
app_.getInboundLedgers().acquire(
lastLedger->header().hash,
lastLedger->header().seq,
InboundLedger::Reason::GENERIC);
}
}
}
}
bool
LedgerMaster::newPathRequest()
{
std::unique_lock ml(mutex_);
pathFindNewRequest_ = newPFWork("PthFindNewReq", ml);
return pathFindNewRequest_;
}
bool
LedgerMaster::isNewPathRequest()
{
std::scoped_lock const ml(mutex_);
bool const ret = pathFindNewRequest_;
pathFindNewRequest_ = false;
return ret;
}
// If the order book is radically updated, we need to reprocess all
// pathfinding requests.
bool
LedgerMaster::newOrderBookDB()
{
std::unique_lock ml(mutex_);
pathLedger_.reset();
return newPFWork("PthFindOBDB", ml);
}
/**
* A thread needs to be dispatched to handle pathfinding work of some kind.
*/
bool
LedgerMaster::newPFWork(char const* name, std::unique_lock<std::recursive_mutex>&)
{
if (!app_.isStopping() && pathFindThread_ < 2 && app_.getPathRequestManager().requestsPending())
{
JLOG(journal_.debug()) << "newPFWork: Creating job. path find threads: " << pathFindThread_;
if (app_.getJobQueue().addJob(JtUpdatePf, name, [this]() { updatePaths(); }))
{
++pathFindThread_;
}
}
// If we're stopping don't give callers the expectation that their
// request will be fulfilled, even if it may be serviced.
return pathFindThread_ > 0 && !app_.isStopping();
}
std::recursive_mutex&
LedgerMaster::peekMutex()
{
return mutex_;
}
// The current ledger is the ledger we believe new transactions should go in
std::shared_ptr<ReadView const>
LedgerMaster::getCurrentLedger()
{
return app_.getOpenLedger().current();
}
std::shared_ptr<Ledger const>
LedgerMaster::getValidatedLedger()
{
return validLedger_.get();
}
Rules
LedgerMaster::getValidatedRules()
{
// Once we have a guarantee that there's always a last validated
// ledger then we can dispense with the if.
// Return the Rules from the last validated ledger.
if (auto const ledger = getValidatedLedger())
return ledger->rules();
return Rules(app_.config().features);
}
// This is the last ledger we published to clients and can lag the validated
// ledger.
std::shared_ptr<ReadView const>
LedgerMaster::getPublishedLedger()
{
std::scoped_lock const lock(mutex_);
return pubLedger_;
}
std::string
LedgerMaster::getCompleteLedgers()
{
std::scoped_lock const sl(completeLock_);
return to_string(completeLedgers_);
}
std::optional<NetClock::time_point>
LedgerMaster::getCloseTimeBySeq(LedgerIndex ledgerIndex)
{
uint256 const hash = getHashBySeq(ledgerIndex);
return hash.isNonZero() ? getCloseTimeByHash(hash, ledgerIndex) : std::nullopt;
}
std::optional<NetClock::time_point>
LedgerMaster::getCloseTimeByHash(LedgerHash const& ledgerHash, std::uint32_t index)
{
auto nodeObject = app_.getNodeStore().fetchNodeObject(ledgerHash, index);
if (nodeObject && (nodeObject->getData().size() >= 120))
{
SerialIter it(nodeObject->getData().data(), nodeObject->getData().size());
if (safeCast<HashPrefix>(it.get32()) == HashPrefix::LedgerMaster)
{
it.skip(
4 + 8 + 32 + // seq drops parentHash
32 + 32 + 4); // txHash acctHash parentClose
return NetClock::time_point{NetClock::duration{it.get32()}};
}
}
return std::nullopt;
}
uint256
LedgerMaster::getHashBySeq(std::uint32_t index)
{
uint256 hash = ledgerHistory_.getLedgerHash(index);
if (hash.isNonZero())
return hash;
return app_.getRelationalDatabase().getHashByIndex(index);
}
std::optional<LedgerHash>
LedgerMaster::walkHashBySeq(std::uint32_t index, InboundLedger::Reason reason)
{
std::optional<LedgerHash> ledgerHash;
if (auto referenceLedger = validLedger_.get())
ledgerHash = walkHashBySeq(index, referenceLedger, reason);
return ledgerHash;
}
std::optional<LedgerHash>
LedgerMaster::walkHashBySeq(
std::uint32_t index,
std::shared_ptr<ReadView const> const& referenceLedger,
InboundLedger::Reason reason)
{
if (!referenceLedger || (referenceLedger->header().seq < index))
{
// Nothing we can do. No validated ledger.
return std::nullopt;
}
// See if the hash for the ledger we need is in the reference ledger
auto ledgerHash = hashOfSeq(*referenceLedger, index, journal_);
if (ledgerHash)
return ledgerHash;
// The hash is not in the reference ledger. Get another ledger which can
// be located easily and should contain the hash.
LedgerIndex const refIndex = getCandidateLedger(index);
auto const refHash = hashOfSeq(*referenceLedger, refIndex, journal_);
XRPL_ASSERT(refHash, "xrpl::LedgerMaster::walkHashBySeq : found ledger");
if (refHash)
{
// Try the hash and sequence of a better reference ledger just found
auto ledger = ledgerHistory_.getLedgerByHash(*refHash);
if (ledger)
{
try
{
ledgerHash = hashOfSeq(*ledger, index, journal_);
}
catch (SHAMapMissingNode const&)
{
ledger.reset();
}
}
// Try to acquire the complete ledger
if (!ledger)
{
if (auto const l = app_.getInboundLedgers().acquire(*refHash, refIndex, reason))
{
ledgerHash = hashOfSeq(*l, index, journal_);
XRPL_ASSERT(
ledgerHash,
"xrpl::LedgerMaster::walkHashBySeq : has complete "
"ledger");
}
}
}
return ledgerHash;
}
std::shared_ptr<Ledger const>
LedgerMaster::getLedgerBySeq(std::uint32_t index)
{
if (index <= validLedgerSeq_)
{
// Always prefer a validated ledger
if (auto valid = validLedger_.get())
{
if (valid->header().seq == index)
return valid;
try
{
auto const hash = hashOfSeq(*valid, index, journal_);
if (hash)
return ledgerHistory_.getLedgerByHash(*hash);
}
catch (std::exception const&) // NOLINT(bugprone-empty-catch)
{
// Missing nodes are already handled
}
}
}
if (auto ret = ledgerHistory_.getLedgerBySeq(index))
return ret;
auto ret = closedLedger_.get();
if (ret && (ret->header().seq == index))
return ret;
clearLedger(index);
return {};
}
std::shared_ptr<Ledger const>
LedgerMaster::getLedgerByHash(uint256 const& hash)
{
if (auto ret = ledgerHistory_.getLedgerByHash(hash))
return ret;
auto ret = closedLedger_.get();
if (ret && (ret->header().hash == hash))
return ret;
return {};
}
void
LedgerMaster::setLedgerRangePresent(std::uint32_t minV, std::uint32_t maxV)
{
std::scoped_lock const sl(completeLock_);
completeLedgers_.insert(range(minV, maxV));
}
void
LedgerMaster::sweep()
{
ledgerHistory_.sweep();
fetchPacks_.sweep();
}
float
LedgerMaster::getCacheHitRate()
{
return ledgerHistory_.getCacheHitRate();
}
void
LedgerMaster::clearPriorLedgers(LedgerIndex seq)
{
std::scoped_lock const sl(completeLock_);
if (seq > 0)
completeLedgers_.erase(range(0u, seq - 1));
}
void
LedgerMaster::clearLedgerCachePrior(LedgerIndex seq)
{
ledgerHistory_.clearLedgerCachePrior(seq);
}
void
LedgerMaster::takeReplay(std::unique_ptr<LedgerReplay> replay)
{
replayData_ = std::move(replay);
}
std::unique_ptr<LedgerReplay>
LedgerMaster::releaseReplay()
{
return std::move(replayData_);
}
void
LedgerMaster::fetchForHistory(
std::uint32_t missing,
bool& progress,
InboundLedger::Reason reason,
std::unique_lock<std::recursive_mutex>& sl)
{
ScopeUnlock const sul{sl};
if (auto hash = getLedgerHashForHistory(missing, reason))
{
XRPL_ASSERT(hash->isNonZero(), "xrpl::LedgerMaster::fetchForHistory : found ledger");
auto ledger = getLedgerByHash(*hash);
if (!ledger)
{
if (!app_.getInboundLedgers().isFailure(*hash))
{
ledger = app_.getInboundLedgers().acquire(*hash, missing, reason);
if (!ledger && missing != fetchSeq_ &&
missing > app_.getNodeStore().earliestLedgerSeq())
{
JLOG(journal_.trace()) << "fetchForHistory want fetch pack " << missing;
fetchSeq_ = missing;
getFetchPack(missing, reason);
}
else
{
JLOG(journal_.trace()) << "fetchForHistory no fetch pack for " << missing;
}
}
else
{
JLOG(journal_.debug()) << "fetchForHistory found failed acquire";
}
}
if (ledger)
{
auto seq = ledger->header().seq;
XRPL_ASSERT(seq == missing, "xrpl::LedgerMaster::fetchForHistory : sequence match");
JLOG(journal_.trace()) << "fetchForHistory acquired " << seq;
setFullLedger(ledger, false, false);
int fillInProgress = 0;
{
std::scoped_lock const lock(mutex_);
histLedger_ = ledger;
fillInProgress = fillInProgress_;
}
if (fillInProgress == 0 &&
app_.getRelationalDatabase().getHashByIndex(seq - 1) == ledger->header().parentHash)
{
{
// Previous ledger is in DB
std::scoped_lock const lock(mutex_);
fillInProgress_ = seq;
}
app_.getJobQueue().addJob(
JtAdvance, "TryFill", [this, ledger]() { tryFill(ledger); });
}
progress = true;
}
else
{
std::uint32_t fetchSz = 0;
// Do not fetch ledger sequences lower
// than the earliest ledger sequence
fetchSz = app_.getNodeStore().earliestLedgerSeq();
fetchSz = missing >= fetchSz ? std::min(ledgerFetchSize_, (missing - fetchSz) + 1) : 0;
try
{
for (std::uint32_t i = 0; i < fetchSz; ++i)
{
std::uint32_t const seq = missing - i;
if (auto h = getLedgerHashForHistory(seq, reason))
{
XRPL_ASSERT(
h->isNonZero(),
"xrpl::LedgerMaster::fetchForHistory : "
"prefetched ledger");
app_.getInboundLedgers().acquire(*h, seq, reason);
}
}
}
catch (std::exception const& ex)
{
JLOG(journal_.warn()) << "Threw while prefetching: " << ex.what();
}
}
}
else
{
JLOG(journal_.fatal()) << "Can't find ledger following prevMissing " << missing;
JLOG(journal_.fatal()) << "Pub:" << pubLedgerSeq_ << " Val:" << validLedgerSeq_;
JLOG(journal_.fatal()) << "Ledgers: " << app_.getLedgerMaster().getCompleteLedgers();
JLOG(journal_.fatal()) << "Acquire reason: "
<< (reason == InboundLedger::Reason::HISTORY ? "HISTORY"
: "NOT HISTORY");
clearLedger(missing + 1);
progress = true;
}
}
// Try to publish ledgers, acquire missing ledgers
void
LedgerMaster::doAdvance(std::unique_lock<std::recursive_mutex>& sl)
{
do
{
advanceWork_ = false; // If there's work to do, we'll make progress
bool progress = false;
auto const pubLedgers = findNewLedgersToPublish(sl);
if (pubLedgers.empty())
{
if (!standalone_ && !app_.getFeeTrack().isLoadedLocal() &&
(app_.getJobQueue().getJobCount(JtPuboldledger) < 10) &&
(validLedgerSeq_ == pubLedgerSeq_) &&
(getValidatedLedgerAge() < kMaxLedgerAgeAcquire) &&
(app_.getNodeStore().getWriteLoad() < kMaxWriteLoadAcquire))
{
// We are in sync, so can acquire
InboundLedger::Reason const reason = InboundLedger::Reason::HISTORY;
std::optional<std::uint32_t> missing;
{
std::scoped_lock const sll(completeLock_);
missing = prevMissing(
completeLedgers_,
pubLedger_->header().seq,
app_.getNodeStore().earliestLedgerSeq());
}
if (missing)
{
JLOG(journal_.trace()) << "tryAdvance discovered missing " << *missing;
if ((fillInProgress_ == 0 || *missing > fillInProgress_) &&
shouldAcquire(
validLedgerSeq_,
ledgerHistorySize_,
app_.getSHAMapStore().minimumOnline(),
*missing,
journal_))
{
JLOG(journal_.trace()) << "advanceThread should acquire";
}
else
{
missing = std::nullopt;
}
}
if (missing)
{
fetchForHistory(*missing, progress, reason, sl);
if (validLedgerSeq_ != pubLedgerSeq_)
{
JLOG(journal_.debug()) << "tryAdvance found last valid changed";
progress = true;
}
}
}
else
{
histLedger_.reset();
JLOG(journal_.trace()) << "tryAdvance not fetching history";
}
}
else
{
JLOG(journal_.trace())
<< "tryAdvance found " << pubLedgers.size() << " ledgers to publish";
for (auto const& ledger : pubLedgers)
{
{
ScopeUnlock const sul{sl};
JLOG(journal_.debug()) << "tryAdvance publishing seq " << ledger->header().seq;
setFullLedger(ledger, true, true);
}
setPubLedger(ledger);
{
ScopeUnlock const sul{sl};
app_.getOPs().pubLedger(ledger);
}
}
app_.getOPs().clearNeedNetworkLedger();
progress = newPFWork("PthFindNewLed", sl);
}
if (progress)
advanceWork_ = true;
} while (advanceWork_);
}
void
LedgerMaster::addFetchPack(uint256 const& hash, std::shared_ptr<Blob> data)
{
fetchPacks_.canonicalizeReplaceClient(hash, data);
}
std::optional<Blob>
LedgerMaster::getFetchPack(uint256 const& hash)
{
Blob data;
if (fetchPacks_.retrieve(hash, data))
{
fetchPacks_.del(hash, false);
if (hash == sha512Half(makeSlice(data)))
return data;
}
return std::nullopt;
}
void
LedgerMaster::gotFetchPack(bool progress, std::uint32_t seq)
{
if (!gotFetchPackThread_.test_and_set(std::memory_order_acquire))
{
app_.getJobQueue().addJob(JtLedgerData, "GotFetchPack", [&]() {
app_.getInboundLedgers().gotFetchPack();
gotFetchPackThread_.clear(std::memory_order_release);
});
}
}
/**
* Populate a fetch pack with data from the map the recipient wants.
*
* A recipient may or may not have the map that they are asking for. If
* they do, we can optimize the transfer by not including parts of the
* map that they are already have.
*
* @param have The map that the recipient already has (if any).
* @param cnt The maximum number of nodes to return.
* @param into The protocol object into which we add information.
* @param seq The sequence number of the ledger the map is a part of.
* @param withLeaves True if leaf nodes should be included.
*
* @note: The withLeaves parameter is configurable even though the
* code, so far, only ever sets the parameter to true.
*
* The rationale is that for transaction trees, it may make
* sense to not include the leaves if the fetch pack is being
* constructed for someone attempting to get a recent ledger
* for which they already have the transactions.
*
* However, for historical ledgers, which is the only use we
* have for fetch packs right now, it makes sense to include
* the transactions because the caller is unlikely to have
* them.
*/
static void
populateFetchPack(
SHAMap const& want,
SHAMap const* have,
std::uint32_t cnt,
protocol::TMGetObjectByHash* into,
std::uint32_t seq,
bool withLeaves = true)
{
XRPL_ASSERT(cnt, "xrpl::populateFetchPack : nonzero count input");
Serializer s(1024);
want.visitDifferences(have, [&s, withLeaves, &cnt, into, seq](SHAMapTreeNode const& n) -> bool {
if (!withLeaves && n.isLeaf())
return true;
s.erase();
n.serializeWithPrefix(s);
auto const& hash = n.getHash().asUInt256();
protocol::TMIndexedObject* obj = into->add_objects();
obj->set_ledgerseq(seq);
obj->set_hash(hash.data(), hash.size());
obj->set_data(s.getDataPtr(), s.getLength());
return --cnt != 0;
});
}
void
LedgerMaster::makeFetchPack(
std::weak_ptr<Peer> const& wPeer,
std::shared_ptr<protocol::TMGetObjectByHash> const& request,
uint256 haveLedgerHash,
UptimeClock::time_point uptime)
{
using namespace std::chrono_literals;
if (UptimeClock::now() > uptime + 1s)
{
JLOG(journal_.info()) << "Fetch pack request got stale";
return;
}
if (app_.getFeeTrack().isLoadedLocal() || (getValidatedLedgerAge() > 40s))
{
JLOG(journal_.info()) << "Too busy to make fetch pack";
return;
}
auto peer = wPeer.lock();
if (!peer)
return;
auto have = getLedgerByHash(haveLedgerHash);
if (!have)
{
JLOG(journal_.info()) << "Peer requests fetch pack for ledger we don't have: " << have;
peer->charge(resource::kFeeRequestNoReply, "get_object ledger");
return;
}
if (have->open())
{
JLOG(journal_.warn()) << "Peer requests fetch pack from open ledger: " << have;
peer->charge(resource::kFeeMalformedRequest, "get_object ledger open");
return;
}
if (have->header().seq < getEarliestFetch())
{
JLOG(journal_.debug()) << "Peer requests fetch pack that is too early";
peer->charge(resource::kFeeMalformedRequest, "get_object ledger early");
return;
}
auto want = getLedgerByHash(have->header().parentHash);
if (!want)
{
JLOG(journal_.info()) << "Peer requests fetch pack for ledger whose predecessor we "
<< "don't have: " << have;
peer->charge(resource::kFeeRequestNoReply, "get_object ledger no parent");
return;
}
try
{
Serializer hdr(128);
protocol::TMGetObjectByHash reply;
reply.set_query(false);
reply.set_ledgerhash(request->ledgerhash());
reply.set_type(protocol::TMGetObjectByHash::otFETCH_PACK);
// Building a fetch pack:
// 1. Add the header for the requested ledger.
// 2. Add the nodes for the AccountStateMap of that ledger.
// 3. If there are transactions, add the nodes for the
// transactions of the ledger.
// 4. If the FetchPack now contains at least 512 entries then stop.
// 5. If not very much time has elapsed, then loop back and repeat
// the same process adding the previous ledger to the FetchPack.
do
{
std::uint32_t const lSeq = want->header().seq;
{
// Serialize the ledger header:
hdr.erase();
hdr.add32(HashPrefix::LedgerMaster);
addRaw(want->header(), hdr);
// Add the data
protocol::TMIndexedObject* obj = reply.add_objects();
obj->set_hash(want->header().hash.data(), want->header().hash.size());
obj->set_data(hdr.getDataPtr(), hdr.getLength());
obj->set_ledgerseq(lSeq);
}
populateFetchPack(want->stateMap(), &have->stateMap(), 16384, &reply, lSeq);
// We use nullptr here because transaction maps are per ledger
// and so the requestor is unlikely to already have it.
if (want->header().txHash.isNonZero())
populateFetchPack(want->txMap(), nullptr, 512, &reply, lSeq);
if (reply.objects().size() >= 512)
break;
have = std::move(want);
want = getLedgerByHash(have->header().parentHash);
} while (want && UptimeClock::now() <= uptime + 1s);
auto msg = std::make_shared<Message>(reply, protocol::mtGET_OBJECTS);
JLOG(journal_.info()) << "Built fetch pack with " << reply.objects().size() << " nodes ("
<< msg->getBufferSize() << " bytes)";
peer->send(msg);
}
catch (std::exception const& ex)
{
JLOG(journal_.warn()) << "Exception building fetch pack. Exception: " << ex.what();
}
}
std::size_t
LedgerMaster::getFetchPackCacheSize() const
{
return fetchPacks_.getCacheSize();
}
// Returns the minimum ledger sequence in SQL database, if any.
std::optional<LedgerIndex>
LedgerMaster::minSqlSeq()
{
return app_.getRelationalDatabase().getMinLedgerSeq();
}
std::optional<uint256>
LedgerMaster::txnIdFromIndex(uint32_t ledgerSeq, uint32_t txnIndex)
{
uint32_t first = 0, last = 0;
if (!getValidatedRange(first, last) || last < ledgerSeq)
return {};
auto const lgr = getLedgerBySeq(ledgerSeq);
if (!lgr || lgr->txs.empty())
return {};
for (auto it = lgr->txs.begin(); it != lgr->txs.end(); ++it)
{
if (it->first && it->second && it->second->isFieldPresent(sfTransactionIndex) &&
it->second->getFieldU32(sfTransactionIndex) == txnIndex)
return it->first->getTransactionID();
}
return {};
}
} // namespace xrpl
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