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d17c8e235fd009544040782d95fffdd08b6b0f3f
xahaud/src/ripple/app/paths/PathRequest.cpp
Miguel Portilla d17c8e235f Fix RPF early response (RIPD-1064)
2015-12-16 11:35:59 -08:00

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//------------------------------------------------------------------------------
/*
This file is part of rippled: https://github.com/ripple/rippled
Copyright (c) 2012, 2013 Ripple Labs Inc.
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include <BeastConfig.h>
#include <ripple/app/paths/AccountCurrencies.h>
#include <ripple/app/paths/RippleCalc.h>
#include <ripple/app/paths/PathRequest.h>
#include <ripple/app/paths/PathRequests.h>
#include <ripple/app/main/Application.h>
#include <ripple/app/misc/NetworkOPs.h>
#include <ripple/basics/Log.h>
#include <ripple/core/Config.h>
#include <ripple/core/LoadFeeTrack.h>
#include <ripple/net/RPCErr.h>
#include <ripple/protocol/ErrorCodes.h>
#include <ripple/protocol/UintTypes.h>
#include <beast/module/core/text/LexicalCast.h>
#include <boost/optional.hpp>
#include <tuple>
namespace ripple {
PathRequest::PathRequest (
Application& app,
const std::shared_ptr<InfoSub>& subscriber,
int id,
PathRequests& owner,
beast::Journal journal)
: app_ (app)
, m_journal (journal)
, mOwner (owner)
, wpSubscriber (subscriber)
, jvStatus (Json::objectValue)
, mLastIndex (0)
, mInProgress (false)
, iLastLevel (0)
, bLastSuccess (false)
, iIdentifier (id)
{
if (m_journal.debug)
m_journal.debug << iIdentifier << " created";
ptCreated = boost::posix_time::microsec_clock::universal_time ();
}
PathRequest::PathRequest (
Application& app,
std::function <void(void)> const& completion,
int id,
PathRequests& owner,
beast::Journal journal)
: app_ (app)
, m_journal (journal)
, mOwner (owner)
, fCompletion (completion)
, jvStatus (Json::objectValue)
, mLastIndex (0)
, mInProgress (false)
, iLastLevel (0)
, bLastSuccess (false)
, iIdentifier (id)
{
if (m_journal.debug)
m_journal.debug << iIdentifier << " created";
ptCreated = boost::posix_time::microsec_clock::universal_time ();
}
static std::string const get_milli_diff (
boost::posix_time::ptime const& after,
boost::posix_time::ptime
const& before)
{
return beast::lexicalCastThrow <std::string> (
static_cast <unsigned> ((after - before).total_milliseconds()));
}
static std::string const get_milli_diff (boost::posix_time::ptime const& before)
{
return get_milli_diff(
boost::posix_time::microsec_clock::universal_time(), before);
}
PathRequest::~PathRequest()
{
std::string fast, full;
if (!ptQuickReply.is_not_a_date_time())
{
fast = " fast:";
fast += get_milli_diff (ptQuickReply, ptCreated);
fast += "ms";
}
if (!ptFullReply.is_not_a_date_time())
{
full = " full:";
full += get_milli_diff (ptFullReply, ptCreated);
full += "ms";
}
if (m_journal.info)
m_journal.info << iIdentifier << " complete:" << fast << full <<
" total:" << get_milli_diff(ptCreated) << "ms";
}
bool PathRequest::isNew ()
{
ScopedLockType sl (mIndexLock);
// does this path request still need its first full path
return mLastIndex == 0;
}
bool PathRequest::needsUpdate (bool newOnly, LedgerIndex index)
{
ScopedLockType sl (mIndexLock);
if (mInProgress)
{
// Another thread is handling this
return false;
}
if (newOnly && (mLastIndex != 0))
{
// Only handling new requests, this isn't new
return false;
}
if (mLastIndex >= index)
{
return false;
}
mInProgress = true;
return true;
}
bool PathRequest::hasCompletion ()
{
return bool (fCompletion);
}
void PathRequest::updateComplete ()
{
ScopedLockType sl (mIndexLock);
assert (mInProgress);
mInProgress = false;
if (fCompletion)
{
fCompletion();
fCompletion = std::function<void (void)>();
}
}
bool PathRequest::isValid (RippleLineCache::ref crCache)
{
ScopedLockType sl (mLock);
if (! raSrcAccount || ! raDstAccount)
return false;
if (! convert_all_ && (saSendMax || saDstAmount <= zero))
{
// If send max specified, dst amt must be -1.
jvStatus = rpcError(rpcDST_AMT_MALFORMED);
return false;
}
if (! crCache->getLedger()->exists(
keylet::account(*raSrcAccount)))
{
// Source account does not exist.
jvStatus = rpcError (rpcSRC_ACT_NOT_FOUND);
return false;
}
auto const& lrLedger = crCache->getLedger();
auto const sleDest = crCache->getLedger()->read(
keylet::account(*raDstAccount));
Json::Value& jvDestCur =
(jvStatus[jss::destination_currencies] = Json::arrayValue);
if (! sleDest)
{
jvDestCur.append (Json::Value (systemCurrencyCode()));
if (! saDstAmount.native ())
{
// Only XRP can be send to a non-existent account.
jvStatus = rpcError (rpcACT_NOT_FOUND);
return false;
}
if (! convert_all_ && saDstAmount <
STAmount (lrLedger->fees().accountReserve (0)))
{
// Payment must meet reserve.
jvStatus = rpcError (rpcDST_AMT_MALFORMED);
return false;
}
}
else
{
bool const disallowXRP (
sleDest->getFlags() & lsfDisallowXRP);
auto usDestCurrID = accountDestCurrencies (
*raDstAccount, crCache, ! disallowXRP);
for (auto const& currency : usDestCurrID)
jvDestCur.append (to_string (currency));
jvStatus[jss::destination_tag] =
(sleDest->getFlags() & lsfRequireDestTag);
}
jvStatus[jss::ledger_hash] = to_string (lrLedger->info().hash);
jvStatus[jss::ledger_index] = lrLedger->seq();
return true;
}
/* If this is a normal path request, we want to run it once "fast" now
to give preliminary results.
If this is a legacy path request, we are only going to run it once,
and we can't run it in full now, so we don't want to run it at all.
If there's an error, we need to be sure to return it to the caller
in all cases.
*/
Json::Value PathRequest::doCreate (
RippleLineCache::ref& cache,
Json::Value const& value,
bool& valid)
{
Json::Value status;
if (parseJson (value) != PFR_PJ_INVALID)
{
valid = isValid (cache);
if (! hasCompletion())
status = valid ? doUpdate(cache, true) : jvStatus;
}
else
{
valid = false;
status = jvStatus;
}
if (m_journal.debug)
{
if (valid)
{
m_journal.debug << iIdentifier
<< " valid: " << toBase58(*raSrcAccount);
m_journal.debug << iIdentifier
<< " Deliver: " << saDstAmount.getFullText ();
}
else
{
m_journal.debug << iIdentifier << " invalid";
}
}
return status;
}
int PathRequest::parseJson (Json::Value const& jvParams)
{
if (! jvParams.isMember(jss::source_account))
{
jvStatus = rpcError(rpcSRC_ACT_MISSING);
return PFR_PJ_INVALID;
}
if (! jvParams.isMember(jss::destination_account))
{
jvStatus = rpcError(rpcDST_ACT_MISSING);
return PFR_PJ_INVALID;
}
if (! jvParams.isMember(jss::destination_amount))
{
jvStatus = rpcError(rpcDST_AMT_MISSING);
return PFR_PJ_INVALID;
}
raSrcAccount = parseBase58<AccountID>(
jvParams[jss::source_account].asString());
if (! raSrcAccount)
{
jvStatus = rpcError (rpcSRC_ACT_MALFORMED);
return PFR_PJ_INVALID;
}
raDstAccount = parseBase58<AccountID>(
jvParams[jss::destination_account].asString());
if (! raDstAccount)
{
jvStatus = rpcError (rpcDST_ACT_MALFORMED);
return PFR_PJ_INVALID;
}
if (! amountFromJsonNoThrow (
saDstAmount, jvParams[jss::destination_amount]))
{
jvStatus = rpcError (rpcDST_AMT_MALFORMED);
return PFR_PJ_INVALID;
}
convert_all_ = saDstAmount == STAmount(saDstAmount.issue(), 1u, 0, true);
if ((saDstAmount.getCurrency ().isZero () &&
saDstAmount.getIssuer ().isNonZero ()) ||
(saDstAmount.getCurrency () == badCurrency ()) ||
(! convert_all_ && saDstAmount <= zero))
{
jvStatus = rpcError (rpcDST_AMT_MALFORMED);
return PFR_PJ_INVALID;
}
if (jvParams.isMember(jss::send_max))
{
// Send_max requires destination amount to be -1.
if (! convert_all_)
{
jvStatus = rpcError(rpcDST_AMT_MALFORMED);
return PFR_PJ_INVALID;
}
saSendMax.emplace();
if (! amountFromJsonNoThrow(
*saSendMax, jvParams[jss::send_max]) ||
(saSendMax->getCurrency().isZero() &&
saSendMax->getIssuer().isNonZero()) ||
(saSendMax->getCurrency() == badCurrency()) ||
(*saSendMax <= zero &&
*saSendMax != STAmount(saSendMax->issue(), 1u, 0, true)))
{
jvStatus = rpcError(rpcSENDMAX_MALFORMED);
return PFR_PJ_INVALID;
}
}
if (jvParams.isMember (jss::source_currencies))
{
Json::Value const& jvSrcCur = jvParams[jss::source_currencies];
if (!jvSrcCur.isArray ())
{
jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
return PFR_PJ_INVALID;
}
sciSourceCurrencies.clear ();
for (unsigned i = 0; i < jvSrcCur.size (); ++i)
{
Json::Value const& jvCur = jvSrcCur[i];
Currency uCur;
AccountID uIss;
if (! jvCur.isObject() ||
! jvCur.isMember (jss::currency) ||
! to_currency (uCur, jvCur[jss::currency].asString ()))
{
jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
return PFR_PJ_INVALID;
}
if (jvCur.isMember (jss::issuer) &&
!to_issuer (uIss, jvCur[jss::issuer].asString ()))
{
jvStatus = rpcError (rpcSRC_ISR_MALFORMED);
}
if (uCur.isZero () && uIss.isNonZero ())
{
jvStatus = rpcError (rpcSRC_CUR_MALFORMED);
return PFR_PJ_INVALID;
}
if (uCur.isNonZero() && uIss.isZero())
uIss = *raSrcAccount;
if (saSendMax)
{
// If the currencies don't match, ignore the source currency.
if (uCur == saSendMax->getCurrency())
{
// If neither is the source and they are not equal, then the
// source issuer is illegal.
if (uIss != *raSrcAccount &&
saSendMax->getIssuer() != *raSrcAccount &&
uIss != saSendMax->getIssuer())
{
jvStatus = rpcError (rpcSRC_ISR_MALFORMED);
return PFR_PJ_INVALID;
}
// If both are the source, use the source.
// Otherwise, use the one that's not the source.
if (uIss != *raSrcAccount)
sciSourceCurrencies.insert({uCur, uIss});
else if (saSendMax->getIssuer() != *raSrcAccount)
sciSourceCurrencies.insert({uCur, saSendMax->getIssuer()});
else
sciSourceCurrencies.insert({uCur, *raSrcAccount});
}
}
else
{
sciSourceCurrencies.insert({uCur, uIss});
}
}
}
if (jvParams.isMember ("id"))
jvId = jvParams["id"];
return PFR_PJ_NOCHANGE;
}
Json::Value PathRequest::doClose (Json::Value const&)
{
m_journal.debug << iIdentifier << " closed";
ScopedLockType sl (mLock);
jvStatus[jss::closed] = true;
return jvStatus;
}
Json::Value PathRequest::doStatus (Json::Value const&)
{
ScopedLockType sl (mLock);
jvStatus[jss::status] = jss::success;
return jvStatus;
}
void PathRequest::resetLevel (int l)
{
if (iLastLevel > l)
iLastLevel = l;
}
std::unique_ptr<Pathfinder> const&
PathRequest::getPathFinder(RippleLineCache::ref cache,
hash_map<Currency, std::unique_ptr<Pathfinder>>& currency_map,
Currency const& currency, STAmount const& dst_amount,
int const level)
{
auto i = currency_map.find(currency);
if (i != currency_map.end())
return i->second;
auto pathfinder = std::make_unique<Pathfinder>(
cache, *raSrcAccount, *raDstAccount, currency,
boost::none, dst_amount, saSendMax, app_);
if (pathfinder->findPaths(level))
pathfinder->computePathRanks(max_paths_);
else
pathfinder.reset(); // It's a bad request - clear it.
return currency_map[currency] = std::move(pathfinder);
}
void
PathRequest::findPaths (RippleLineCache::ref cache, int const level,
Json::Value& jvArray)
{
auto sourceCurrencies = sciSourceCurrencies;
if (sourceCurrencies.empty ())
{
auto usCurrencies =
accountSourceCurrencies(*raSrcAccount, cache, true);
bool sameAccount = *raSrcAccount == *raDstAccount;
for (auto const& c : usCurrencies)
{
if (!sameAccount || (c != saDstAmount.getCurrency()))
{
sourceCurrencies.insert(
{c, c.isZero() ? xrpAccount() : *raSrcAccount});
}
}
}
auto const dst_amount = convert_all_ ?
STAmount(saDstAmount.issue(), STAmount::cMaxValue, STAmount::cMaxOffset)
: saDstAmount;
hash_map<Currency, std::unique_ptr<Pathfinder>> currency_map;
for (auto const& issue : sourceCurrencies)
{
JLOG(m_journal.debug)
<< iIdentifier
<< " Trying to find paths: "
<< STAmount(issue, 1).getFullText();
auto& pathfinder = getPathFinder(cache, currency_map,
issue.currency, dst_amount, level);
if (! pathfinder)
{
assert(false);
m_journal.debug << iIdentifier << " No paths found";
continue;
}
STPath fullLiquidityPath;
auto ps = pathfinder->getBestPaths(max_paths_,
fullLiquidityPath, mContext[issue], issue.account);
mContext[issue] = ps;
auto& sourceAccount = ! isXRP(issue.account)
? issue.account
: isXRP(issue.currency)
? xrpAccount()
: *raSrcAccount;
STAmount saMaxAmount = saSendMax.value_or(
STAmount({issue.currency, sourceAccount}, 1u, 0, true));
m_journal.debug << iIdentifier
<< " Paths found, calling rippleCalc";
path::RippleCalc::Input rcInput;
if (convert_all_)
rcInput.partialPaymentAllowed = true;
auto sandbox = std::make_unique<PaymentSandbox>
(&*cache->getLedger(), tapNONE);
auto rc = path::RippleCalc::rippleCalculate(
*sandbox,
saMaxAmount, // --> Amount to send is unlimited
// to get an estimate.
dst_amount, // --> Amount to deliver.
*raDstAccount, // --> Account to deliver to.
*raSrcAccount, // --> Account sending from.
ps, // --> Path set.
app_.logs(),
&rcInput);
if (! convert_all_ &&
! fullLiquidityPath.empty() &&
(rc.result() == terNO_LINE || rc.result() == tecPATH_PARTIAL))
{
m_journal.debug << iIdentifier
<< " Trying with an extra path element";
ps.push_back(fullLiquidityPath);
sandbox = std::make_unique<PaymentSandbox>
(&*cache->getLedger(), tapNONE);
rc = path::RippleCalc::rippleCalculate(
*sandbox,
saMaxAmount, // --> Amount to send is unlimited
// to get an estimate.
dst_amount, // --> Amount to deliver.
*raDstAccount, // --> Account to deliver to.
*raSrcAccount, // --> Account sending from.
ps, // --> Path set.
app_.logs());
if (rc.result() != tesSUCCESS)
{
m_journal.warning << iIdentifier
<< " Failed with covering path "
<< transHuman(rc.result());
}
else
{
m_journal.debug << iIdentifier
<< " Extra path element gives "
<< transHuman(rc.result());
}
}
if (rc.result () == tesSUCCESS)
{
Json::Value jvEntry (Json::objectValue);
rc.actualAmountIn.setIssuer (sourceAccount);
jvEntry[jss::source_amount] = rc.actualAmountIn.getJson (0);
jvEntry[jss::paths_computed] = ps.getJson(0);
if (convert_all_)
jvEntry[jss::destination_amount] = rc.actualAmountOut.getJson(0);
if (hasCompletion ())
{
// Old ripple_path_find API requires this
jvEntry[jss::paths_canonical] = Json::arrayValue;
}
jvArray.append (jvEntry);
}
else
{
m_journal.debug << iIdentifier << " rippleCalc returns "
<< transHuman(rc.result());
}
}
}
Json::Value PathRequest::doUpdate (RippleLineCache::ref cache, bool fast)
{
m_journal.debug << iIdentifier << " update " << (fast ? "fast" : "normal");
ScopedLockType sl (mLock);
if (!isValid (cache))
return jvStatus;
jvStatus = Json::objectValue;
if (hasCompletion ())
{
// Old ripple_path_find API gives destination_currencies
auto& destCurrencies = (jvStatus[jss::destination_currencies] = Json::arrayValue);
auto usCurrencies = accountDestCurrencies (*raDstAccount, cache, true);
for (auto const& c : usCurrencies)
destCurrencies.append (to_string (c));
}
jvStatus[jss::source_account] = app_.accountIDCache().toBase58(*raSrcAccount);
jvStatus[jss::destination_account] = app_.accountIDCache().toBase58(*raDstAccount);
jvStatus[jss::destination_amount] = saDstAmount.getJson (0);
jvStatus[jss::full_reply] = ! fast;
if (jvId)
jvStatus["id"] = jvId;
int iLevel = iLastLevel;
bool loaded = app_.getFeeTrack().isLoadedLocal();
if (iLevel == 0)
{
// first pass
if (loaded || fast)
iLevel = app_.config().PATH_SEARCH_FAST;
else
iLevel = app_.config().PATH_SEARCH;
}
else if ((iLevel == app_.config().PATH_SEARCH_FAST) && !fast)
{
// leaving fast pathfinding
iLevel = app_.config().PATH_SEARCH;
if (loaded && (iLevel > app_.config().PATH_SEARCH_FAST))
--iLevel;
}
else if (bLastSuccess)
{
// decrement, if possible
if (iLevel > app_.config().PATH_SEARCH ||
(loaded && (iLevel > app_.config().PATH_SEARCH_FAST)))
--iLevel;
}
else
{
// adjust as needed
if (!loaded && (iLevel < app_.config().PATH_SEARCH_MAX))
++iLevel;
if (loaded && (iLevel > app_.config().PATH_SEARCH_FAST))
--iLevel;
}
m_journal.debug << iIdentifier << " processing at level " << iLevel;
Json::Value jvArray = Json::arrayValue;
findPaths(cache, iLevel, jvArray);
bLastSuccess = jvArray.size();
iLastLevel = iLevel;
if (fast && ptQuickReply.is_not_a_date_time())
{
ptQuickReply = boost::posix_time::microsec_clock::universal_time();
mOwner.reportFast ((ptQuickReply-ptCreated).total_milliseconds());
}
else if (!fast && ptFullReply.is_not_a_date_time())
{
ptFullReply = boost::posix_time::microsec_clock::universal_time();
mOwner.reportFull ((ptFullReply-ptCreated).total_milliseconds());
}
jvStatus[jss::alternatives] = jvArray;
return jvStatus;
}
InfoSub::pointer PathRequest::getSubscriber ()
{
return wpSubscriber.lock ();
}
} // ripple
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