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https://github.com/XRPLF/rippled.git
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505 lines
18 KiB
C++
505 lines
18 KiB
C++
#include "Application.h"
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#include "OfferCreateTransactor.h"
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#include <boost/foreach.hpp>
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#include <boost/bind.hpp>
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SETUP_LOG();
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// Take as much as possible. Adjusts account balances. Charges fees on top to taker.
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// --> uBookBase: The order book to take against.
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// --> saTakerPays: What the taker offers (w/ issuer)
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// --> saTakerGets: What the taker wanted (w/ issuer)
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// <-- saTakerPaid: What taker paid not including fees. To reduce an offer.
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// <-- saTakerGot: What taker got not including fees. To reduce an offer.
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// <-- terResult: tesSUCCESS or terNO_ACCOUNT
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TER OfferCreateTransactor::takeOffers(
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bool bPassive,
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const uint256& uBookBase,
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const uint160& uTakerAccountID,
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const SLE::pointer& sleTakerAccount,
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const STAmount& saTakerPays,
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const STAmount& saTakerGets,
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STAmount& saTakerPaid,
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STAmount& saTakerGot)
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{
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assert(saTakerPays && saTakerGets);
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cLog(lsINFO) << "takeOffers: against book: " << uBookBase.ToString();
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uint256 uTipIndex = uBookBase;
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const uint256 uBookEnd = Ledger::getQualityNext(uBookBase);
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const uint64 uTakeQuality = STAmount::getRate(saTakerGets, saTakerPays);
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const uint160 uTakerPaysAccountID = saTakerPays.getIssuer();
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const uint160 uTakerGetsAccountID = saTakerGets.getIssuer();
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TER terResult = temUNCERTAIN;
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boost::unordered_set<uint256> usOfferUnfundedFound; // Offers found unfunded.
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boost::unordered_set<uint256> usOfferUnfundedBecame; // Offers that became unfunded.
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boost::unordered_set<uint160> usAccountTouched; // Accounts touched.
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saTakerPaid = STAmount(saTakerPays.getCurrency(), saTakerPays.getIssuer());
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saTakerGot = STAmount(saTakerGets.getCurrency(), saTakerGets.getIssuer());
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while (temUNCERTAIN == terResult)
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{
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SLE::pointer sleOfferDir;
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uint64 uTipQuality;
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// Figure out next offer to take, if needed.
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if (saTakerGets != saTakerGot && saTakerPays != saTakerPaid)
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{
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// Taker, still, needs to get and pay.
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sleOfferDir = mEngine->entryCache(ltDIR_NODE, mEngine->getLedger()->getNextLedgerIndex(uTipIndex, uBookEnd));
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if (sleOfferDir)
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{
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cLog(lsINFO) << "takeOffers: possible counter offer found";
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uTipIndex = sleOfferDir->getIndex();
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uTipQuality = Ledger::getQuality(uTipIndex);
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}
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else
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{
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cLog(lsINFO) << "takeOffers: counter offer book is empty: "
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<< uTipIndex.ToString()
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<< " ... "
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<< uBookEnd.ToString();
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}
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}
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if (!sleOfferDir // No offer directory to take.
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|| uTakeQuality < uTipQuality // No offers of sufficient quality available.
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|| (bPassive && uTakeQuality == uTipQuality))
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{
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// Done.
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cLog(lsINFO) << "takeOffers: done";
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terResult = tesSUCCESS;
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}
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else
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{
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// Have an offer directory to consider.
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cLog(lsINFO) << "takeOffers: considering dir: " << sleOfferDir->getJson(0);
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SLE::pointer sleBookNode;
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unsigned int uBookEntry;
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uint256 uOfferIndex;
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mEngine->getNodes().dirFirst(uTipIndex, sleBookNode, uBookEntry, uOfferIndex);
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SLE::pointer sleOffer = mEngine->entryCache(ltOFFER, uOfferIndex);
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cLog(lsINFO) << "takeOffers: considering offer : " << sleOffer->getJson(0);
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const uint160 uOfferOwnerID = sleOffer->getFieldAccount(sfAccount).getAccountID();
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STAmount saOfferPays = sleOffer->getFieldAmount(sfTakerGets);
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STAmount saOfferGets = sleOffer->getFieldAmount(sfTakerPays);
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if (sleOffer->isFieldPresent(sfExpiration) && sleOffer->getFieldU32(sfExpiration) <= mEngine->getLedger()->getParentCloseTimeNC())
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{
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// Offer is expired. Expired offers are considered unfunded. Delete it.
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cLog(lsINFO) << "takeOffers: encountered expired offer";
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usOfferUnfundedFound.insert(uOfferIndex);
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}
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else if (uOfferOwnerID == uTakerAccountID)
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{
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// Would take own offer. Consider old offer expired. Delete it.
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cLog(lsINFO) << "takeOffers: encountered taker's own old offer";
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usOfferUnfundedFound.insert(uOfferIndex);
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}
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else
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{
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// Get offer funds available.
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cLog(lsINFO) << "takeOffers: saOfferPays=" << saOfferPays.getFullText();
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STAmount saOfferFunds = mEngine->getNodes().accountFunds(uOfferOwnerID, saOfferPays);
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STAmount saTakerFunds = mEngine->getNodes().accountFunds(uTakerAccountID, saTakerPays);
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SLE::pointer sleOfferAccount; // Owner of offer.
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if (!saOfferFunds.isPositive())
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{
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// Offer is unfunded, possibly due to previous balance action.
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cLog(lsINFO) << "takeOffers: offer unfunded: delete";
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boost::unordered_set<uint160>::iterator account = usAccountTouched.find(uOfferOwnerID);
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if (account != usAccountTouched.end())
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{
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// Previously touched account.
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usOfferUnfundedBecame.insert(uOfferIndex); // Delete unfunded offer on success.
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}
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else
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{
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// Never touched source account.
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usOfferUnfundedFound.insert(uOfferIndex); // Delete found unfunded offer when possible.
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}
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}
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else
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{
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STAmount saPay = saTakerPays - saTakerPaid;
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if (saTakerFunds < saPay)
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saPay = saTakerFunds;
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STAmount saSubTakerPaid;
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STAmount saSubTakerGot;
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STAmount saTakerIssuerFee;
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STAmount saOfferIssuerFee;
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cLog(lsINFO) << "takeOffers: applyOffer: saTakerPays: " << saTakerPays.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saTakerPaid: " << saTakerPaid.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saTakerFunds: " << saTakerFunds.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saOfferFunds: " << saOfferFunds.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saPay: " << saPay.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saOfferPays: " << saOfferPays.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saOfferGets: " << saOfferGets.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saTakerPays: " << saTakerPays.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saTakerGets: " << saTakerGets.getFullText();
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bool bOfferDelete = STAmount::applyOffer(
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mEngine->getNodes().rippleTransferRate(uTakerAccountID, uOfferOwnerID, uTakerPaysAccountID),
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mEngine->getNodes().rippleTransferRate(uOfferOwnerID, uTakerAccountID, uTakerGetsAccountID),
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saOfferFunds,
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saPay, // Driver XXX need to account for fees.
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saOfferPays,
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saOfferGets,
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saTakerPays,
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saTakerGets,
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saSubTakerPaid,
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saSubTakerGot,
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saTakerIssuerFee,
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saOfferIssuerFee);
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cLog(lsINFO) << "takeOffers: applyOffer: saSubTakerPaid: " << saSubTakerPaid.getFullText();
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cLog(lsINFO) << "takeOffers: applyOffer: saSubTakerGot: " << saSubTakerGot.getFullText();
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// Adjust offer
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// Offer owner will pay less. Subtract what taker just got.
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sleOffer->setFieldAmount(sfTakerGets, saOfferPays -= saSubTakerGot);
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// Offer owner will get less. Subtract what owner just paid.
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sleOffer->setFieldAmount(sfTakerPays, saOfferGets -= saSubTakerPaid);
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mEngine->entryModify(sleOffer);
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if (bOfferDelete)
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{
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// Offer now fully claimed or now unfunded.
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cLog(lsINFO) << "takeOffers: offer claimed: delete";
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usOfferUnfundedBecame.insert(uOfferIndex); // Delete unfunded offer on success.
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// Offer owner's account is no longer pristine.
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usAccountTouched.insert(uOfferOwnerID);
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}
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else
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{
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cLog(lsINFO) << "takeOffers: offer partial claim.";
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}
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assert(!!saSubTakerGot.getIssuer());
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assert(!!saSubTakerPaid.getIssuer());
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// Offer owner pays taker.
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// saSubTakerGot.setIssuer(uTakerGetsAccountID); // XXX Move this earlier?
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terResult = mEngine->getNodes().accountSend(uOfferOwnerID, uTakerAccountID, saSubTakerGot);
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if (tesSUCCESS == terResult)
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terResult = mEngine->getNodes().accountSend(uOfferOwnerID, uTakerGetsAccountID, saOfferIssuerFee);
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// Taker pays offer owner.
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// saSubTakerPaid.setIssuer(uTakerPaysAccountID);
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if (tesSUCCESS == terResult)
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terResult = mEngine->getNodes().accountSend(uTakerAccountID, uOfferOwnerID, saSubTakerPaid);
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if (tesSUCCESS == terResult)
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terResult = mEngine->getNodes().accountSend(uTakerAccountID, uTakerPaysAccountID, saTakerIssuerFee);
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saTakerGot += saSubTakerGot;
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saTakerPaid += saSubTakerPaid;
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if (tesSUCCESS == terResult)
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terResult = temUNCERTAIN;
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}
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}
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}
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}
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cLog(lsINFO) << "takeOffers: " << transToken(terResult);
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// On storing meta data, delete offers that were found unfunded to prevent encountering them in future.
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if (tesSUCCESS == terResult)
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{
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BOOST_FOREACH(const uint256& uOfferIndex, usOfferUnfundedFound)
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{
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cLog(lsINFO) << "takeOffers: found unfunded: " << uOfferIndex.ToString();
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terResult = mEngine->getNodes().offerDelete(uOfferIndex);
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if (tesSUCCESS != terResult)
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break;
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}
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}
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if (tesSUCCESS == terResult)
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{
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// On success, delete offers that became unfunded.
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BOOST_FOREACH(const uint256& uOfferIndex, usOfferUnfundedBecame)
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{
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cLog(lsINFO) << "takeOffers: became unfunded: " << uOfferIndex.ToString();
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terResult = mEngine->getNodes().offerDelete(uOfferIndex);
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if (tesSUCCESS != terResult)
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break;
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}
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}
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cLog(lsINFO) << "takeOffers< " << transToken(terResult);
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return terResult;
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}
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TER OfferCreateTransactor::doApply()
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{
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cLog(lsWARNING) << "OfferCreate> " << mTxn.getJson(0);
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const uint32 uTxFlags = mTxn.getFlags();
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const bool bPassive = isSetBit(uTxFlags, tfPassive);
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STAmount saTakerPays = mTxn.getFieldAmount(sfTakerPays);
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STAmount saTakerGets = mTxn.getFieldAmount(sfTakerGets);
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cLog(lsINFO) << boost::str(boost::format("OfferCreate: saTakerPays=%s saTakerGets=%s")
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% saTakerPays.getFullText()
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% saTakerGets.getFullText());
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const uint160 uPaysIssuerID = saTakerPays.getIssuer();
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const uint160 uGetsIssuerID = saTakerGets.getIssuer();
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const uint32 uExpiration = mTxn.getFieldU32(sfExpiration);
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const bool bHaveExpiration = mTxn.isFieldPresent(sfExpiration);
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const uint32 uSequence = mTxn.getSequence();
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const uint256 uLedgerIndex = Ledger::getOfferIndex(mTxnAccountID, uSequence);
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cLog(lsINFO) << "OfferCreate: Creating offer node: " << uLedgerIndex.ToString() << " uSequence=" << uSequence;
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const uint160 uPaysCurrency = saTakerPays.getCurrency();
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const uint160 uGetsCurrency = saTakerGets.getCurrency();
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const uint64 uRate = STAmount::getRate(saTakerGets, saTakerPays);
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TER terResult = tesSUCCESS;
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uint256 uDirectory; // Delete hints.
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uint64 uOwnerNode;
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uint64 uBookNode;
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if (uTxFlags & tfOfferCreateMask)
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{
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cLog(lsINFO) << "OfferCreate: Malformed transaction: Invalid flags set.";
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return temINVALID_FLAG;
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}
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else if (bHaveExpiration && !uExpiration)
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{
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cLog(lsWARNING) << "OfferCreate: Malformed offer: bad expiration";
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terResult = temBAD_EXPIRATION;
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}
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else if (bHaveExpiration && mEngine->getLedger()->getParentCloseTimeNC() >= uExpiration)
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{
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cLog(lsWARNING) << "OfferCreate: Expired transaction: offer expired";
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terResult = tesSUCCESS; // Only charged fee.
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}
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else if (saTakerPays.isNative() && saTakerGets.isNative())
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{
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cLog(lsWARNING) << "OfferCreate: Malformed offer: XRP for XRP";
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terResult = temBAD_OFFER;
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}
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else if (!saTakerPays.isPositive() || !saTakerGets.isPositive())
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{
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cLog(lsWARNING) << "OfferCreate: Malformed offer: bad amount";
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terResult = temBAD_OFFER;
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}
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else if (uPaysCurrency == uGetsCurrency && uPaysIssuerID == uGetsIssuerID)
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{
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cLog(lsWARNING) << "OfferCreate: Malformed offer: redundant offer";
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terResult = temREDUNDANT;
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}
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else if (saTakerPays.isNative() != !uPaysIssuerID || saTakerGets.isNative() != !uGetsIssuerID)
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{
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cLog(lsWARNING) << "OfferCreate: Malformed offer: bad issuer";
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terResult = temBAD_ISSUER;
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}
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else if (!mEngine->getNodes().accountFunds(mTxnAccountID, saTakerGets).isPositive())
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{
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cLog(lsWARNING) << "OfferCreate: delay: Offers must be at least partially funded.";
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terResult = tecUNFUNDED_OFFER;
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}
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if (tesSUCCESS == terResult && !saTakerPays.isNative())
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{
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SLE::pointer sleTakerPays = mEngine->entryCache(ltACCOUNT_ROOT, Ledger::getAccountRootIndex(uPaysIssuerID));
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if (!sleTakerPays)
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{
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cLog(lsWARNING) << "OfferCreate: delay: can't receive IOUs from non-existent issuer: " << RippleAddress::createHumanAccountID(uPaysIssuerID);
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terResult = terNO_ACCOUNT;
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}
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}
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STAmount saOfferPaid;
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STAmount saOfferGot;
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if (tesSUCCESS == terResult)
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{
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const uint256 uTakeBookBase = Ledger::getBookBase(uGetsCurrency, uGetsIssuerID, uPaysCurrency, uPaysIssuerID);
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cLog(lsINFO) << boost::str(boost::format("OfferCreate: take against book: %s for %s -> %s")
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% uTakeBookBase.ToString()
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% saTakerGets.getFullText()
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% saTakerPays.getFullText());
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// Take using the parameters of the offer.
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cLog(lsWARNING) << "OfferCreate: takeOffers: BEFORE saTakerGets=" << saTakerGets.getFullText();
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terResult = takeOffers(
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bPassive,
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uTakeBookBase,
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mTxnAccountID,
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mTxnAccount,
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saTakerGets,
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saTakerPays,
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saOfferPaid, // How much was spent.
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saOfferGot // How much was got.
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);
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cLog(lsWARNING) << "OfferCreate: takeOffers=" << terResult;
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cLog(lsWARNING) << "OfferCreate: takeOffers: saOfferPaid=" << saOfferPaid.getFullText();
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cLog(lsWARNING) << "OfferCreate: takeOffers: saOfferGot=" << saOfferGot.getFullText();
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cLog(lsWARNING) << "OfferCreate: takeOffers: saTakerPays=" << saTakerPays.getFullText();
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cLog(lsWARNING) << "OfferCreate: takeOffers: AFTER saTakerGets=" << saTakerGets.getFullText();
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if (tesSUCCESS == terResult)
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{
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saTakerPays -= saOfferGot; // Reduce payin from takers by what offer just got.
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saTakerGets -= saOfferPaid; // Reduce payout to takers by what srcAccount just paid.
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}
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}
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cLog(lsWARNING) << "OfferCreate: takeOffers: saTakerPays=" << saTakerPays.getFullText();
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cLog(lsWARNING) << "OfferCreate: takeOffers: saTakerGets=" << saTakerGets.getFullText();
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cLog(lsWARNING) << "OfferCreate: takeOffers: mTxnAccountID=" << RippleAddress::createHumanAccountID(mTxnAccountID);
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cLog(lsWARNING) << "OfferCreate: takeOffers: FUNDS=" << mEngine->getNodes().accountFunds(mTxnAccountID, saTakerGets).getFullText();
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// cLog(lsWARNING) << "OfferCreate: takeOffers: uPaysIssuerID=" << RippleAddress::createHumanAccountID(uPaysIssuerID);
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// cLog(lsWARNING) << "OfferCreate: takeOffers: uGetsIssuerID=" << RippleAddress::createHumanAccountID(uGetsIssuerID);
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if (tesSUCCESS != terResult
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|| !saTakerPays // Wants nothing more.
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|| !saTakerGets // Offering nothing more.
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|| !mEngine->getNodes().accountFunds(mTxnAccountID, saTakerGets).isPositive()) // Not funded.
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{
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// Complete as is.
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nothing();
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}
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else if (mTxnAccount->getFieldAmount(sfBalance).getNValue() < mEngine->getLedger()->getReserve(mTxnAccount->getFieldU32(sfOwnerCount)+1))
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{
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if (isSetBit(mParams, tapOPEN_LEDGER)) // Ledger is not final, can vote no.
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{
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// Hope for more reserve to come in or more offers to consume.
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terResult = tecINSUF_RESERVE_OFFER;
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}
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else if (!saOfferPaid && !saOfferGot)
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{
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// Ledger is final, insufficent reserve to create offer, processed nothing.
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terResult = tecINSUF_RESERVE_OFFER;
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}
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else
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{
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// Ledger is final, insufficent reserve to create offer, processed something.
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// Consider the offer unfunded. Treat as tesSUCCESS.
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nothing();
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}
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}
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else
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{
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// We need to place the remainder of the offer into its order book.
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cLog(lsINFO) << boost::str(boost::format("OfferCreate: offer not fully consumed: saTakerPays=%s saTakerGets=%s")
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% saTakerPays.getFullText()
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% saTakerGets.getFullText());
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// Add offer to owner's directory.
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terResult = mEngine->getNodes().dirAdd(uOwnerNode, Ledger::getOwnerDirIndex(mTxnAccountID), uLedgerIndex,
|
|
boost::bind(&Ledger::qualityDirDescriber, _1, saTakerPays.getCurrency(), uPaysIssuerID,
|
|
saTakerGets.getCurrency(), uGetsIssuerID, uRate));
|
|
|
|
|
|
if (tesSUCCESS == terResult)
|
|
{
|
|
mEngine->getNodes().ownerCountAdjust(mTxnAccountID, 1, mTxnAccount); // Update owner count.
|
|
|
|
uint256 uBookBase = Ledger::getBookBase(uPaysCurrency, uPaysIssuerID, uGetsCurrency, uGetsIssuerID);
|
|
|
|
cLog(lsINFO) << boost::str(boost::format("OfferCreate: adding to book: %s : %s/%s -> %s/%s")
|
|
% uBookBase.ToString()
|
|
% saTakerPays.getHumanCurrency()
|
|
% RippleAddress::createHumanAccountID(saTakerPays.getIssuer())
|
|
% saTakerGets.getHumanCurrency()
|
|
% RippleAddress::createHumanAccountID(saTakerGets.getIssuer()));
|
|
|
|
uDirectory = Ledger::getQualityIndex(uBookBase, uRate); // Use original rate.
|
|
|
|
// Add offer to order book.
|
|
terResult = mEngine->getNodes().dirAdd(uBookNode, uDirectory, uLedgerIndex,
|
|
boost::bind(&Ledger::qualityDirDescriber, _1, saTakerPays.getCurrency(), uPaysIssuerID,
|
|
saTakerGets.getCurrency(), uGetsIssuerID, uRate));
|
|
}
|
|
|
|
if (tesSUCCESS == terResult)
|
|
{
|
|
cLog(lsWARNING) << "OfferCreate: sfAccount=" << RippleAddress::createHumanAccountID(mTxnAccountID);
|
|
cLog(lsWARNING) << "OfferCreate: uPaysIssuerID=" << RippleAddress::createHumanAccountID(uPaysIssuerID);
|
|
cLog(lsWARNING) << "OfferCreate: uGetsIssuerID=" << RippleAddress::createHumanAccountID(uGetsIssuerID);
|
|
cLog(lsWARNING) << "OfferCreate: saTakerPays.isNative()=" << saTakerPays.isNative();
|
|
cLog(lsWARNING) << "OfferCreate: saTakerGets.isNative()=" << saTakerGets.isNative();
|
|
cLog(lsWARNING) << "OfferCreate: uPaysCurrency=" << saTakerPays.getHumanCurrency();
|
|
cLog(lsWARNING) << "OfferCreate: uGetsCurrency=" << saTakerGets.getHumanCurrency();
|
|
|
|
SLE::pointer sleOffer = mEngine->entryCreate(ltOFFER, uLedgerIndex);
|
|
|
|
sleOffer->setFieldAccount(sfAccount, mTxnAccountID);
|
|
sleOffer->setFieldU32(sfSequence, uSequence);
|
|
sleOffer->setFieldH256(sfBookDirectory, uDirectory);
|
|
sleOffer->setFieldAmount(sfTakerPays, saTakerPays);
|
|
sleOffer->setFieldAmount(sfTakerGets, saTakerGets);
|
|
sleOffer->setFieldU64(sfOwnerNode, uOwnerNode);
|
|
sleOffer->setFieldU64(sfBookNode, uBookNode);
|
|
|
|
if (uExpiration)
|
|
sleOffer->setFieldU32(sfExpiration, uExpiration);
|
|
|
|
if (bPassive)
|
|
sleOffer->setFlag(lsfPassive);
|
|
|
|
cLog(lsINFO) << boost::str(boost::format("OfferCreate: final terResult=%s sleOffer=%s")
|
|
% transToken(terResult)
|
|
% sleOffer->getJson(0));
|
|
}
|
|
}
|
|
|
|
tLog(tesSUCCESS != terResult, lsINFO) << boost::str(boost::format("OfferCreate: final terResult=%s") % transToken(terResult));
|
|
|
|
return terResult;
|
|
}
|
|
|
|
// vim:ts=4
|