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https://github.com/XRPLF/rippled.git
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64ee0d07d0
* Zero lets classes efficiently compare with 0, so you can use constructors like x < zero or y != zero. * New BEAST_CONSTEXPR to handle Windows/C++11 differences regarding the constexpr specifier.
480 lines
15 KiB
C++
480 lines
15 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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namespace ripple {
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SETUP_LOG (PathRequest)
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PathRequest::PathRequest (
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const boost::shared_ptr<InfoSub>& subscriber, int id, PathRequests& owner,
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beast::Journal journal)
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: m_journal (journal)
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, mOwner (owner)
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, wpSubscriber (subscriber)
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, jvStatus (Json::objectValue)
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, bValid (false)
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, iLastIndex (0)
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, iLastLevel (0)
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, bLastSuccess (false)
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, iIdentifier (id)
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{
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if (m_journal.debug)
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m_journal.debug << iIdentifier << " created";
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ptCreated = boost::posix_time::microsec_clock::universal_time ();
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}
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static std::string const get_milli_diff (boost::posix_time::ptime const& after, boost::posix_time::ptime const& before)
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{
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return beast::lexicalCastThrow <std::string> (static_cast <unsigned> ((after - before).total_milliseconds()));
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}
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static std::string const get_milli_diff (boost::posix_time::ptime const& before)
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{
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return get_milli_diff(boost::posix_time::microsec_clock::universal_time(), before);
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}
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PathRequest::~PathRequest()
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{
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std::string fast, full;
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if (!ptQuickReply.is_not_a_date_time())
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{
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fast = " fast:";
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fast += get_milli_diff (ptQuickReply, ptCreated);
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fast += "ms";
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}
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if (!ptFullReply.is_not_a_date_time())
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{
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full = " full:";
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full += get_milli_diff (ptFullReply, ptCreated);
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full += "ms";
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}
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if (m_journal.info)
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m_journal.info << iIdentifier << " complete:" << fast << full <<
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" total:" << get_milli_diff(ptCreated) << "ms";
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}
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bool PathRequest::isValid ()
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{
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ScopedLockType sl (mLock);
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return bValid;
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}
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bool PathRequest::isNew ()
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{
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// does this path request still need its first full path
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return iLastIndex.load() == 0;
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}
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bool PathRequest::needsUpdate (bool newOnly, LedgerIndex index)
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{
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LedgerIndex lastIndex = iLastIndex.load();
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for (;;)
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{
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if (newOnly)
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{
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// Is this request new
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if (lastIndex != 0)
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return false;
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// This thread marks this request handled
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if (iLastIndex.compare_exchange_weak (lastIndex, 1,
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std::memory_order_release, std::memory_order_relaxed))
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return true;
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}
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else
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{
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// Has the request already been handled?
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if (lastIndex >= index)
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return false;
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// This thread marks this request handled
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if (iLastIndex.compare_exchange_weak (lastIndex, index,
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std::memory_order_release, std::memory_order_relaxed))
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return true;
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}
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}
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}
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bool PathRequest::isValid (RippleLineCache::ref crCache)
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{
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ScopedLockType sl (mLock);
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bValid = raSrcAccount.isSet () && raDstAccount.isSet () && saDstAmount > zero;
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Ledger::pointer lrLedger = crCache->getLedger ();
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if (bValid)
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{
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AccountState::pointer asSrc = getApp().getOPs ().getAccountState (crCache->getLedger(), raSrcAccount);
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if (!asSrc)
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{
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// no source account
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bValid = false;
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jvStatus = rpcError (rpcSRC_ACT_NOT_FOUND);
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}
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else
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{
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AccountState::pointer asDst = getApp().getOPs ().getAccountState (lrLedger, raDstAccount);
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Json::Value& jvDestCur = (jvStatus["destination_currencies"] = Json::arrayValue);
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if (!asDst)
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{
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// no destination account
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jvDestCur.append (Json::Value ("XRP"));
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if (!saDstAmount.isNative ())
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{
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// only XRP can be send to a non-existent account
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bValid = false;
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jvStatus = rpcError (rpcACT_NOT_FOUND);
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}
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else if (saDstAmount < STAmount (lrLedger->getReserve (0)))
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{
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// payment must meet reserve
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bValid = false;
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jvStatus = rpcError (rpcDST_AMT_MALFORMED);
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}
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}
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else
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{
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bool includeXRP = !isSetBit (asDst->peekSLE ().getFlags(), lsfDisallowXRP);
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boost::unordered_set<uint160> usDestCurrID =
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usAccountDestCurrencies (raDstAccount, crCache, includeXRP);
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BOOST_FOREACH (const uint160 & uCurrency, usDestCurrID)
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jvDestCur.append (STAmount::createHumanCurrency (uCurrency));
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jvStatus["destination_tag"] = (asDst->peekSLE ().getFlags () & lsfRequireDestTag) != 0;
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}
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}
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}
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if (bValid)
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{
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jvStatus["ledger_hash"] = lrLedger->getHash ().GetHex ();
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jvStatus["ledger_index"] = lrLedger->getLedgerSeq ();
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}
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return bValid;
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}
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Json::Value PathRequest::doCreate (Ledger::ref lrLedger, RippleLineCache::ref& cache,
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const Json::Value& value, bool& valid)
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{
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Json::Value status;
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if (parseJson (value, true) != PFR_PJ_INVALID)
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{
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bValid = isValid (cache);
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if (bValid)
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status = doUpdate (cache, true);
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else
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status = jvStatus;
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}
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else
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{
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bValid = false;
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status = jvStatus;
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}
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if (m_journal.debug)
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{
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if (bValid)
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{
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m_journal.debug << iIdentifier << " valid: " << raSrcAccount.humanAccountID ();
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m_journal.debug << iIdentifier << " Deliver: " << saDstAmount.getFullText ();
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}
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else
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m_journal.debug << iIdentifier << " invalid";
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}
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valid = bValid;
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return status;
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}
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int PathRequest::parseJson (const Json::Value& jvParams, bool complete)
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{
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int ret = PFR_PJ_NOCHANGE;
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if (jvParams.isMember ("source_account"))
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{
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if (!raSrcAccount.setAccountID (jvParams["source_account"].asString ()))
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{
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jvStatus = rpcError (rpcSRC_ACT_MALFORMED);
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return PFR_PJ_INVALID;
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}
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}
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else if (complete)
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{
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jvStatus = rpcError (rpcSRC_ACT_MISSING);
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return PFR_PJ_INVALID;
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}
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if (jvParams.isMember ("destination_account"))
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{
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if (!raDstAccount.setAccountID (jvParams["destination_account"].asString ()))
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{
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jvStatus = rpcError (rpcDST_ACT_MALFORMED);
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return PFR_PJ_INVALID;
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}
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}
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else if (complete)
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{
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jvStatus = rpcError (rpcDST_ACT_MISSING);
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return PFR_PJ_INVALID;
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}
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if (jvParams.isMember ("destination_amount"))
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{
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if (!saDstAmount.bSetJson (jvParams["destination_amount"]) ||
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(saDstAmount.getCurrency ().isZero () && saDstAmount.getIssuer ().isNonZero ()) ||
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(saDstAmount.getCurrency () == CURRENCY_BAD) ||
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saDstAmount <= zero)
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{
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jvStatus = rpcError (rpcDST_AMT_MALFORMED);
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return PFR_PJ_INVALID;
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}
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}
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else if (complete)
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{
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jvStatus = rpcError (rpcDST_ACT_MISSING);
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return PFR_PJ_INVALID;
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}
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if (jvParams.isMember ("source_currencies"))
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{
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const Json::Value& jvSrcCur = jvParams["source_currencies"];
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if (!jvSrcCur.isArray ())
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{
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jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
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return PFR_PJ_INVALID;
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}
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sciSourceCurrencies.clear ();
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for (unsigned i = 0; i < jvSrcCur.size (); ++i)
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{
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const Json::Value& jvCur = jvSrcCur[i];
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uint160 uCur, uIss;
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if (!jvCur.isObject() || !jvCur.isMember ("currency") || !STAmount::currencyFromString (uCur, jvCur["currency"].asString ()))
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{
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jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
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return PFR_PJ_INVALID;
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}
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if (jvCur.isMember ("issuer") && !STAmount::issuerFromString (uIss, jvCur["issuer"].asString ()))
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{
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jvStatus = rpcError (rpcSRC_ISR_MALFORMED);
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}
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if (uCur.isZero () && uIss.isNonZero ())
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{
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jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
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return PFR_PJ_INVALID;
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}
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sciSourceCurrencies.insert (currIssuer_t (uCur, uIss));
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}
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}
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if (jvParams.isMember ("id"))
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jvId = jvParams["id"];
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return ret;
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}
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Json::Value PathRequest::doClose (const Json::Value&)
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{
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m_journal.debug << iIdentifier << " closed";
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ScopedLockType sl (mLock);
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return jvStatus;
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}
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Json::Value PathRequest::doStatus (const Json::Value&)
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{
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ScopedLockType sl (mLock);
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return jvStatus;
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}
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void PathRequest::resetLevel (int l)
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{
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if (iLastLevel > l)
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iLastLevel = l;
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}
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Json::Value PathRequest::doUpdate (RippleLineCache::ref cache, bool fast)
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{
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m_journal.debug << iIdentifier << " update " << (fast ? "fast" : "normal");
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ScopedLockType sl (mLock);
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if (!isValid (cache))
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return jvStatus;
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jvStatus = Json::objectValue;
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std::set<currIssuer_t> sourceCurrencies (sciSourceCurrencies);
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if (sourceCurrencies.empty ())
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{
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boost::unordered_set<uint160> usCurrencies =
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usAccountSourceCurrencies (raSrcAccount, cache, true);
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bool sameAccount = raSrcAccount == raDstAccount;
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BOOST_FOREACH (const uint160 & c, usCurrencies)
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{
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if (!sameAccount || (c != saDstAmount.getCurrency ()))
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{
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if (c.isZero ())
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sourceCurrencies.insert (std::make_pair (c, ACCOUNT_XRP));
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else
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sourceCurrencies.insert (std::make_pair (c, raSrcAccount.getAccountID ()));
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}
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}
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}
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jvStatus["source_account"] = raSrcAccount.humanAccountID ();
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jvStatus["destination_account"] = raDstAccount.humanAccountID ();
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jvStatus["destination_amount"] = saDstAmount.getJson (0);
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if (!jvId.isNull ())
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jvStatus["id"] = jvId;
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Json::Value jvArray = Json::arrayValue;
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int iLevel = iLastLevel;
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bool loaded = getApp().getFeeTrack().isLoadedLocal();
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if (iLevel == 0)
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{ // first pass
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if (loaded || fast)
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iLevel = getConfig().PATH_SEARCH_FAST;
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else
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iLevel = getConfig().PATH_SEARCH;
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}
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else if ((iLevel == getConfig().PATH_SEARCH_FAST) && !fast)
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{ // leaving fast pathfinding
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iLevel = getConfig().PATH_SEARCH;
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if (loaded && (iLevel > getConfig().PATH_SEARCH_FAST))
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--iLevel;
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}
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else if (bLastSuccess)
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{ // decrement, if possible
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if ((iLevel > getConfig().PATH_SEARCH) || (loaded && (iLevel > getConfig().PATH_SEARCH_FAST)))
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--iLevel;
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}
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else
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{ // adjust as needed
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if (!loaded && (iLevel < getConfig().PATH_SEARCH_MAX))
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++iLevel;
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if (loaded && (iLevel > getConfig().PATH_SEARCH_FAST))
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--iLevel;
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}
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m_journal.debug << iIdentifier << " processing at level " << iLevel;
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bool found = false;
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BOOST_FOREACH (const currIssuer_t & currIssuer, sourceCurrencies)
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{
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{
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STAmount test (currIssuer.first, currIssuer.second, 1);
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if (m_journal.debug)
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m_journal.debug << iIdentifier << " Trying to find paths: " << test.getFullText ();
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}
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bool valid;
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STPathSet& spsPaths = mContext[currIssuer];
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Pathfinder pf (cache, raSrcAccount, raDstAccount,
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currIssuer.first, currIssuer.second, saDstAmount, valid);
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CondLog (!valid, lsDEBUG, PathRequest) << iIdentifier << " PF request not valid";
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STPath extraPath;
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if (valid && pf.findPaths (iLevel, 4, spsPaths, extraPath))
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{
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LedgerEntrySet lesSandbox (cache->getLedger (), tapNONE);
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std::vector<PathState::pointer> vpsExpanded;
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STAmount saMaxAmountAct;
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STAmount saDstAmountAct;
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STAmount saMaxAmount (currIssuer.first,
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currIssuer.second.isNonZero () ? currIssuer.second :
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(currIssuer.first.isZero () ? ACCOUNT_XRP : raSrcAccount.getAccountID ()), 1);
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saMaxAmount.negate ();
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m_journal.debug << iIdentifier << " Paths found, calling rippleCalc";
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TER terResult = RippleCalc::rippleCalc (lesSandbox, saMaxAmountAct, saDstAmountAct,
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vpsExpanded, saMaxAmount, saDstAmount,
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raDstAccount.getAccountID (), raSrcAccount.getAccountID (),
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spsPaths, false, false, false, true);
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if ((extraPath.size() > 0) && ((terResult == terNO_LINE) || (terResult == tecPATH_PARTIAL)))
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{
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m_journal.debug << iIdentifier << " Trying with an extra path element";
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spsPaths.addPath(extraPath);
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vpsExpanded.clear ();
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terResult = RippleCalc::rippleCalc (lesSandbox, saMaxAmountAct, saDstAmountAct,
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vpsExpanded, saMaxAmount, saDstAmount,
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raDstAccount.getAccountID (), raSrcAccount.getAccountID (),
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spsPaths, false, false, false, true);
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m_journal.debug << iIdentifier << " Extra path element gives " << transHuman (terResult);
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}
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if (terResult == tesSUCCESS)
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{
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Json::Value jvEntry (Json::objectValue);
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jvEntry["source_amount"] = saMaxAmountAct.getJson (0);
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jvEntry["paths_computed"] = spsPaths.getJson (0);
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found = true;
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jvArray.append (jvEntry);
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}
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else
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{
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m_journal.debug << iIdentifier << " rippleCalc returns " << transHuman (terResult);
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}
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}
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else
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{
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m_journal.debug << iIdentifier << " No paths found";
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}
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}
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iLastLevel = iLevel;
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bLastSuccess = found;
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if (fast && ptQuickReply.is_not_a_date_time())
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{
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ptQuickReply = boost::posix_time::microsec_clock::universal_time();
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mOwner.reportFast ((ptQuickReply-ptCreated).total_milliseconds());
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}
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else if (!fast && ptFullReply.is_not_a_date_time())
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{
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ptFullReply = boost::posix_time::microsec_clock::universal_time();
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mOwner.reportFull ((ptFullReply-ptCreated).total_milliseconds());
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}
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jvStatus["alternatives"] = jvArray;
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return jvStatus;
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}
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InfoSub::pointer PathRequest::getSubscriber ()
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{
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return wpSubscriber.lock ();
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}
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} // ripple
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