Ledger::pointer LedgerHistory::getLedgerBySeq (std::uint32_t index)
{
{
LedgersByHash::ScopedLockType sl (m_ledgers_by_hash.peekMutex ());
std::map <std::uint32_t, uint256>::iterator it (mLedgersByIndex.find (index));
if (it != mLedgersByIndex.end ())
{
uint256 hash = it->second;
sl.unlock ();
return getLedgerByHash (hash);
}
}
Ledger::pointer ret (Ledger::loadByIndex (index));
if (!ret)
return ret;
assert (ret->getLedgerSeq () == index);
{
// Add this ledger to the local tracking by index
LedgersByHash::ScopedLockType sl (m_ledgers_by_hash.peekMutex ());
assert (ret->isImmutable ());
m_ledgers_by_hash.canonicalize (ret->getHash (), ret);
mLedgersByIndex[ret->getLedgerSeq ()] = ret->getHash ();
return (ret->getLedgerSeq () == index) ? ret : Ledger::pointer ();
}
}
Ledger::pointer LedgerHistory::getLedgerBySeq (uint32 index)
{
TaggedCache::ScopedLockType sl (mLedgersByHash.peekMutex (), __FILE__, __LINE__);
std::map<uint32, uint256>::iterator it (mLedgersByIndex.find (index));
if (it != mLedgersByIndex.end ())
{
uint256 hash = it->second;
sl.unlock ();
return getLedgerByHash (hash);
}
sl.unlock ();
Ledger::pointer ret (Ledger::loadByIndex (index));
if (!ret)
return ret;
assert (ret->getLedgerSeq () == index);
sl.lock (__FILE__, __LINE__);
assert (ret->isImmutable ());
mLedgersByHash.canonicalize (ret->getHash (), ret);
mLedgersByIndex[ret->getLedgerSeq ()] = ret->getHash ();
return (ret->getLedgerSeq () == index) ? ret : Ledger::pointer ();
}
void LedgerHistory::addLedger (Ledger::pointer ledger, bool validated)
{
assert (ledger && ledger->isImmutable ());
assert (ledger->peekAccountStateMap ()->getHash ().isNonZero ());
TaggedCache::ScopedLockType sl (mLedgersByHash.peekMutex (), __FILE__, __LINE__);
mLedgersByHash.canonicalize (ledger->getHash(), ledger, true);
if (validated)
mLedgersByIndex[ledger->getLedgerSeq()] = ledger->getHash();
}
bool LedgerHistory::addLedger (Ledger::pointer ledger, bool validated)
{
assert (ledger && ledger->isImmutable ());
assert (ledger->peekAccountStateMap ()->getHash ().isNonZero ());
LedgersByHash::ScopedLockType sl (m_ledgers_by_hash.peekMutex ());
const bool alreadyHad = m_ledgers_by_hash.canonicalize (ledger->getHash(), ledger, true);
if (validated)
mLedgersByIndex[ledger->getLedgerSeq()] = ledger->getHash();
return alreadyHad;
}
Ledger::pointer LedgerMaster::closeLedger(bool recover)
{
boost::recursive_mutex::scoped_lock sl(mLock);
Ledger::pointer closingLedger = mCurrentLedger;
if (recover)
{
int recovers = 0;
for (CanonicalTXSet::iterator it = mHeldTransactions.begin(), end = mHeldTransactions.end(); it != end; ++it)
{
try
{
bool didApply;
mEngine.applyTransaction(*it->second, tapOPEN_LEDGER, didApply);
if (didApply)
++recovers;
}
catch (...)
{
cLog(lsWARNING) << "Held transaction throws";
}
}
tLog(recovers != 0, lsINFO) << "Recovered " << recovers << " held transactions";
mHeldTransactions.reset(closingLedger->getHash());
}
mCurrentLedger = boost::make_shared<Ledger>(boost::ref(*closingLedger), true);
mEngine.setLedger(mCurrentLedger);
return closingLedger;
}
Ledger::pointer LedgerHistory::getLedgerByHash (uint256 const& hash)
{
Ledger::pointer ret = m_ledgers_by_hash.fetch (hash);
if (ret)
{
assert (ret->isImmutable ());
assert (ret->getHash () == hash);
return ret;
}
ret = Ledger::loadByHash (hash);
if (!ret)
return ret;
assert (ret->isImmutable ());
assert (ret->getHash () == hash);
m_ledgers_by_hash.canonicalize (ret->getHash (), ret);
assert (ret->getHash () == hash);
return ret;
}
/** Process a single ledger
@param ledgerIndex The index of the ledger to process.
@param ledgerHash The known correct hash of the ledger.
@param doNodes Ensure all ledger nodes are in the node db.
@param doTxns Reprocess (account) transactions to SQL databases.
@return `true` if the ledger was cleaned.
*/
bool doLedger(
LedgerIndex const& ledgerIndex,
LedgerHash const& ledgerHash,
bool doNodes,
bool doTxns)
{
Ledger::pointer nodeLedger =
getApp().getInboundLedgers().acquire (
ledgerHash, ledgerIndex, InboundLedger::fcGENERIC);
if (!nodeLedger)
{
m_journal.debug << "Ledger " << ledgerIndex << " not available";
return false;
}
Ledger::pointer dbLedger = Ledger::loadByIndex(ledgerIndex);
if (! dbLedger ||
(dbLedger->getHash() != ledgerHash) ||
(dbLedger->getParentHash() != nodeLedger->getParentHash()))
{
// Ideally we'd also check for more than one ledger with that index
m_journal.debug <<
"Ledger " << ledgerIndex << " mismatches SQL DB";
doTxns = true;
}
if(! getApp().getLedgerMaster().fixIndex(ledgerIndex, ledgerHash))
{
m_journal.debug << "ledger " << ledgerIndex << " had wrong entry in history";
doTxns = true;
}
if (doNodes && !nodeLedger->walkLedger())
{
m_journal.debug << "Ledger " << ledgerIndex << " is missing nodes";
getApp().getInboundLedgers().acquire(
ledgerHash, ledgerIndex, InboundLedger::fcGENERIC);
return false;
}
if (doTxns && !nodeLedger->pendSaveValidated(true, false))
{
m_journal.debug << "Failed to save ledger " << ledgerIndex;
return false;
}
return true;
}
// VFALCO TODO This should return boost::optional<uint256>
LedgerHash getLedgerHash(Ledger::pointer ledger, LedgerIndex index)
{
boost::optional<LedgerHash> hash;
try
{
hash = hashOfSeq(*ledger, index,
getApp().getSLECache(), m_journal);
}
catch (SHAMapMissingNode &)
{
m_journal.warning <<
"Node missing from ledger " << ledger->getLedgerSeq();
getApp().getInboundLedgers().acquire (
ledger->getHash(), ledger->getLedgerSeq(), InboundLedger::fcGENERIC);
}
return hash ? *hash : zero; // kludge
}
// The previous version of the lookupLedger command would accept the
// "ledger_index" argument as a string and silently treat it as a request to
// return the current ledger which, while not strictly wrong, could cause a lot
// of confusion.
//
// The code now robustly validates the input and ensures that the only possible
// values for the "ledger_index" parameter are the index of a ledger passed as
// an integer or one of the strings "current", "closed" or "validated".
// Additionally, the code ensures that the value passed in "ledger_hash" is a
// string and a valid hash. Invalid values will return an appropriate error
// code.
//
// In the absence of the "ledger_hash" or "ledger_index" parameters, the code
// assumes that "ledger_index" has the value "current".
//
// Returns a Json::objectValue. If there was an error, it will be in that
// return value. Otherwise, the object contains the field "validated" and
// optionally the fields "ledger_hash", "ledger_index" and
// "ledger_current_index", if they are defined.
Status lookupLedger (
Json::Value const& params,
Ledger::pointer& ledger,
NetworkOPs& netOps,
Json::Value& jsonResult)
{
if (auto status = ledgerFromRequest (params, ledger, netOps))
return status;
if (ledger->isClosed ())
{
jsonResult[jss::ledger_hash] = to_string (ledger->getHash());
jsonResult[jss::ledger_index] = ledger->getLedgerSeq();
}
else
{
jsonResult[jss::ledger_current_index] = ledger->getLedgerSeq();
}
jsonResult[jss::validated] = isValidated (*ledger);
return Status::OK;
}
bool PathRequest::isValid (RippleLineCache::ref crCache)
{
ScopedLockType sl (mLock);
bValid = raSrcAccount.isSet () && raDstAccount.isSet () && saDstAmount > zero;
Ledger::pointer lrLedger = crCache->getLedger ();
if (bValid)
{
AccountState::pointer asSrc = getApp().getOPs ().getAccountState (crCache->getLedger(), raSrcAccount);
if (!asSrc)
{
// no source account
bValid = false;
jvStatus = rpcError (rpcSRC_ACT_NOT_FOUND);
}
else
{
AccountState::pointer asDst = getApp().getOPs ().getAccountState (lrLedger, raDstAccount);
Json::Value& jvDestCur = (jvStatus["destination_currencies"] = Json::arrayValue);
if (!asDst)
{
// no destination account
jvDestCur.append (Json::Value ("XRP"));
if (!saDstAmount.isNative ())
{
// only XRP can be send to a non-existent account
bValid = false;
jvStatus = rpcError (rpcACT_NOT_FOUND);
}
else if (saDstAmount < STAmount (lrLedger->getReserve (0)))
{
// payment must meet reserve
bValid = false;
jvStatus = rpcError (rpcDST_AMT_MALFORMED);
}
}
else
{
bool const disallowXRP (
asDst->peekSLE ().getFlags() & lsfDisallowXRP);
CurrencySet usDestCurrID =
usAccountDestCurrencies (raDstAccount, crCache, !disallowXRP);
for (auto const& currency : usDestCurrID)
jvDestCur.append (to_string (currency));
jvStatus["destination_tag"] = (asDst->peekSLE ().getFlags () & lsfRequireDestTag) != 0;
}
}
}
if (bValid)
{
jvStatus["ledger_hash"] = to_string (lrLedger->getHash ());
jvStatus["ledger_index"] = lrLedger->getLedgerSeq ();
}
return bValid;
}
// Get state nodes from a ledger
// Inputs:
// limit: integer, maximum number of entries
// marker: opaque, resume point
// binary: boolean, format
// Outputs:
// ledger_hash: chosen ledger's hash
// ledger_index: chosen ledger's index
// state: array of state nodes
// marker: resume point, if any
Json::Value doLedgerData (RPC::Context& context)
{
context.lock_.unlock ();
int const BINARY_PAGE_LENGTH = 256;
int const JSON_PAGE_LENGTH = 2048;
Ledger::pointer lpLedger;
Json::Value jvResult = RPC::lookupLedger (context.params_, lpLedger, context.netOps_);
if (!lpLedger)
return jvResult;
uint256 resumePoint;
if (context.params_.isMember ("marker"))
{
Json::Value const& jMarker = context.params_["marker"];
if (!jMarker.isString ())
return RPC::expected_field_error ("marker", "valid");
if (!resumePoint.SetHex (jMarker.asString ()))
return RPC::expected_field_error ("marker", "valid");
}
bool isBinary = false;
if (context.params_.isMember ("binary"))
{
Json::Value const& jBinary = context.params_["binary"];
if (!jBinary.isBool ())
return RPC::expected_field_error ("binary", "bool");
isBinary = jBinary.asBool ();
}
int limit = -1;
int maxLimit = isBinary ? BINARY_PAGE_LENGTH : JSON_PAGE_LENGTH;
if (context.params_.isMember ("limit"))
{
Json::Value const& jLimit = context.params_["limit"];
if (!jLimit.isIntegral ())
return RPC::expected_field_error ("limit", "integer");
limit = jLimit.asInt ();
}
if ((limit < 0) || ((limit > maxLimit) && (context.role_ != Config::ADMIN)))
limit = maxLimit;
Json::Value jvReply = Json::objectValue;
jvReply["ledger_hash"] = to_string (lpLedger->getHash());
jvReply["ledger_index"] = beast::lexicalCastThrow <std::string> (lpLedger->getLedgerSeq ());
Json::Value& nodes = (jvReply["state"] = Json::arrayValue);
SHAMap& map = *(lpLedger->peekAccountStateMap ());
for (;;)
{
SHAMapItem::pointer item = map.peekNextItem (resumePoint);
if (!item)
break;
resumePoint = item->getTag();
if (limit-- <= 0)
{
--resumePoint;
jvReply["marker"] = to_string (resumePoint);
break;
}
if (isBinary)
{
Json::Value& entry = nodes.append (Json::objectValue);
entry["data"] = strHex (item->peekData().begin(), item->peekData().size());
entry["index"] = to_string (item->getTag ());
}
else
{
SLE sle (item->peekSerializer(), item->getTag ());
Json::Value& entry = nodes.append (sle.getJson (0));
entry["index"] = to_string (item->getTag ());
}
}
return jvReply;
}