// Take as much as possible. Adjusts account balances. Charges fees on top to taker.
// --> uBookBase: The order book to take against.
// --> saTakerPays: What the taker offers (w/ issuer)
// --> saTakerGets: What the taker wanted (w/ issuer)
// <-- saTakerPaid: What taker could have paid including saved not including fees. To reduce an offer.
// <-- saTakerGot: What taker got not including fees. To reduce an offer.
// <-- terResult: tesSUCCESS, terNO_ACCOUNT, telFAILED_PROCESSING, or tecFAILED_PROCESSING
// <-- bUnfunded: if tesSUCCESS, consider offer unfunded after taking.
TER OfferCreateTransactor::takeOffers (
const bool bOpenLedger,
const bool bPassive,
const bool bSell,
uint256 const& uBookBase,
const uint160& uTakerAccountID,
SLE::ref sleTakerAccount,
const STAmount& saTakerPays,
const STAmount& saTakerGets,
STAmount& saTakerPaid,
STAmount& saTakerGot,
bool& bUnfunded)
{
// The book has the most elements. Take the perspective of the book.
// Book is ordered for taker: taker pays / taker gets (smaller is better)
// The order is for the other books currencys for get and pays are opposites.
// We want the same ratio for the respective currencies.
// So we swap paid and gets for determing take quality.
assert (saTakerPays && saTakerGets);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: bSell: " << bSell << ": against book: " << uBookBase.ToString ();
LedgerEntrySet& lesActive = mEngine->getNodes ();
uint256 uTipIndex = uBookBase;
const uint256 uBookEnd = Ledger::getQualityNext (uBookBase);
const uint64 uTakeQuality = STAmount::getRate (saTakerGets, saTakerPays);
STAmount saTakerRate = STAmount::setRate (uTakeQuality);
const uint160 uTakerPaysAccountID = saTakerPays.getIssuer ();
const uint160 uTakerGetsAccountID = saTakerGets.getIssuer ();
TER terResult = temUNCERTAIN;
boost::unordered_set<uint256> usOfferUnfundedBecame; // Offers that became unfunded.
boost::unordered_set<uint160> usAccountTouched; // Accounts touched.
saTakerPaid = STAmount (saTakerPays.getCurrency (), saTakerPays.getIssuer ());
saTakerGot = STAmount (saTakerGets.getCurrency (), saTakerGets.getIssuer ());
bUnfunded = false;
while (temUNCERTAIN == terResult)
{
SLE::pointer sleOfferDir;
uint64 uTipQuality = 0;
STAmount saTakerFunds = lesActive.accountFunds (uTakerAccountID, saTakerPays);
STAmount saSubTakerPays = saTakerPays - saTakerPaid; // How much more to spend.
STAmount saSubTakerGets = saTakerGets - saTakerGot; // How much more is wanted.
// Figure out next offer to take, if needed.
if (saTakerFunds.isPositive () // Taker has funds available.
&& saSubTakerPays.isPositive ()
&& saSubTakerGets.isPositive ())
{
sleOfferDir = mEngine->entryCache (ltDIR_NODE, lesActive.getNextLedgerIndex (uTipIndex, uBookEnd));
if (sleOfferDir)
{
uTipIndex = sleOfferDir->getIndex ();
uTipQuality = Ledger::getQuality (uTipIndex);
WriteLog (lsDEBUG, OfferCreateTransactor) << boost::str (boost::format ("takeOffers: possible counter offer found: uTipQuality=%d uTipIndex=%s")
% uTipQuality
% uTipIndex.ToString ());
}
else
{
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: counter offer book is empty: "
<< uTipIndex.ToString ()
<< " ... "
<< uBookEnd.ToString ();
}
}
if (!saTakerFunds.isPositive ()) // Taker has no funds.
{
// Done. Ran out of funds on previous round. As fees aren't calculated directly in this routine, funds are checked here.
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: done: taker unfunded.";
bUnfunded = true; // Don't create an order.
terResult = tesSUCCESS;
}
else if (!sleOfferDir // No offer directory to take.
|| uTakeQuality < uTipQuality // No offers of sufficient quality available.
|| (bPassive && uTakeQuality == uTipQuality))
{
// Done.
STAmount saTipRate = sleOfferDir ? STAmount::setRate (uTipQuality) : saTakerRate;
WriteLog (lsDEBUG, OfferCreateTransactor) << boost::str (boost::format ("takeOffers: done: dir=%d uTakeQuality=%d %c uTipQuality=%d saTakerRate=%s %c saTipRate=%s bPassive=%d")
% !!sleOfferDir
% uTakeQuality
% (uTakeQuality == uTipQuality
? '='
: uTakeQuality < uTipQuality
? '<'
: '>')
% uTipQuality
% saTakerRate
% (saTakerRate == saTipRate
? '='
: saTakerRate < saTipRate
? '<'
: '>')
% saTipRate
% bPassive);
terResult = tesSUCCESS;
}
else
{
// Have an offer directory to consider.
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: considering dir: " << sleOfferDir->getJson (0);
SLE::pointer sleBookNode;
unsigned int uBookEntry;
uint256 uOfferIndex;
lesActive.dirFirst (uTipIndex, sleBookNode, uBookEntry, uOfferIndex);
SLE::pointer sleOffer = mEngine->entryCache (ltOFFER, uOfferIndex);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: considering offer : " << sleOffer->getJson (0);
const uint160 uOfferOwnerID = sleOffer->getFieldAccount160 (sfAccount);
STAmount saOfferPays = sleOffer->getFieldAmount (sfTakerGets);
STAmount saOfferGets = sleOffer->getFieldAmount (sfTakerPays);
STAmount saOfferFunds; // Funds of offer owner to payout.
bool bValid;
bValid = bValidOffer (
sleOfferDir, uOfferIndex, uOfferOwnerID, saOfferPays, saOfferGets,
uTakerAccountID,
usOfferUnfundedFound, usOfferUnfundedBecame, usAccountTouched,
saOfferFunds);
if (bValid)
{
STAmount saSubTakerPaid;
STAmount saSubTakerGot;
STAmount saTakerIssuerFee;
STAmount saOfferIssuerFee;
STAmount saOfferRate = STAmount::setRate (uTipQuality);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerPays: " << saTakerPays.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerPaid: " << saTakerPaid.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerFunds: " << saTakerFunds.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferFunds: " << saOfferFunds.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferPays: " << saOfferPays.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferGets: " << saOfferGets.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferRate: " << saOfferRate.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerPays: " << saSubTakerPays.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerGets: " << saSubTakerGets.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerPays: " << saTakerPays.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerGets: " << saTakerGets.getFullText ();
bool bOfferDelete = STAmount::applyOffer (
bSell,
lesActive.rippleTransferRate (uTakerAccountID, uOfferOwnerID, uTakerPaysAccountID),
lesActive.rippleTransferRate (uOfferOwnerID, uTakerAccountID, uTakerGetsAccountID),
saOfferRate,
saOfferFunds,
saTakerFunds,
saOfferPays,
saOfferGets,
saSubTakerPays,
saSubTakerGets,
saSubTakerPaid,
saSubTakerGot,
saTakerIssuerFee,
saOfferIssuerFee);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerPaid: " << saSubTakerPaid.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerGot: " << saSubTakerGot.getFullText ();
// Adjust offer
// Offer owner will pay less. Subtract what taker just got.
sleOffer->setFieldAmount (sfTakerGets, saOfferPays -= saSubTakerGot);
// Offer owner will get less. Subtract what owner just paid.
sleOffer->setFieldAmount (sfTakerPays, saOfferGets -= saSubTakerPaid);
mEngine->entryModify (sleOffer);
if (bOfferDelete)
{
// Offer now fully claimed or now unfunded.
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: Offer claimed: Delete.";
usOfferUnfundedBecame.insert (uOfferIndex); // Delete unfunded offer on success.
// Offer owner's account is no longer pristine.
usAccountTouched.insert (uOfferOwnerID);
}
else if (saSubTakerGot)
{
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: Offer partial claim.";
if (!saOfferPays.isPositive () || !saOfferGets.isPositive ())
{
WriteLog (lsWARNING, OfferCreateTransactor) << "takeOffers: ILLEGAL OFFER RESULT.";
bUnfunded = true;
terResult = bOpenLedger ? telFAILED_PROCESSING : tecFAILED_PROCESSING;
}
}
else
{
// Taker got nothing, probably due to rounding. Consider taker unfunded.
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: No claim.";
bUnfunded = true;
terResult = tesSUCCESS; // Done.
}
assert (uTakerGetsAccountID == saSubTakerGot.getIssuer ());
assert (uTakerPaysAccountID == saSubTakerPaid.getIssuer ());
if (!bUnfunded)
{
// Distribute funds. The sends charge appropriate fees which are implied by offer.
terResult = lesActive.accountSend (uOfferOwnerID, uTakerAccountID, saSubTakerGot); // Offer owner pays taker.
if (tesSUCCESS == terResult)
terResult = lesActive.accountSend (uTakerAccountID, uOfferOwnerID, saSubTakerPaid); // Taker pays offer owner.
if (!bSell)
{
// Buy semantics: Reduce amount considered paid by taker's rate. Not by actual cost which is lower.
// That is, take less as to just satify our buy requirement.
STAmount saTakerCould = saTakerPays - saTakerPaid; // Taker could pay.
if (saTakerFunds < saTakerCould)
saTakerCould = saTakerFunds;
STAmount saTakerUsed = STAmount::multiply (saSubTakerGot, saTakerRate, saTakerPays);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerCould: " << saTakerCould.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerGot: " << saSubTakerGot.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerRate: " << saTakerRate.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerUsed: " << saTakerUsed.getFullText ();
saSubTakerPaid = std::min (saTakerCould, saTakerUsed);
}
saTakerPaid += saSubTakerPaid;
saTakerGot += saSubTakerGot;
if (tesSUCCESS == terResult)
terResult = temUNCERTAIN;
}
}
}
}
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: " << transToken (terResult);
if (tesSUCCESS == terResult)
{
// On success, delete offers that became unfunded.
BOOST_FOREACH (uint256 const & uOfferIndex, usOfferUnfundedBecame)
{
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: became unfunded: " << uOfferIndex.ToString ();
terResult = lesActive.offerDelete (uOfferIndex);
if (tesSUCCESS != terResult)
break;
}
TER doApply () override
{
assert (mTxnAccount);
// A ticket counts against the reserve of the issuing account, but we check
// the starting balance because we want to allow dipping into the reserve to
// pay fees.
auto const accountReserve (mEngine->getLedger ()->getReserve (
mTxnAccount->getFieldU32 (sfOwnerCount) + 1));
if (mPriorBalance.getNValue () < accountReserve)
return tecINSUFFICIENT_RESERVE;
std::uint32_t expiration (0);
if (mTxn.isFieldPresent (sfExpiration))
{
expiration = mTxn.getFieldU32 (sfExpiration);
if (!expiration)
{
m_journal.warning <<
"Malformed ticket requestion: bad expiration";
return temBAD_EXPIRATION;
}
if (mEngine->getLedger ()->getParentCloseTimeNC () >= expiration)
return tesSUCCESS;
}
SLE::pointer sleTicket = mEngine->entryCreate (ltTICKET,
Ledger::getTicketIndex (mTxnAccountID, mTxn.getSequence ()));
sleTicket->setFieldAccount (sfAccount, mTxnAccountID);
sleTicket->setFieldU32 (sfSequence, mTxn.getSequence ());
if (expiration != 0)
sleTicket->setFieldU32 (sfExpiration, expiration);
if (mTxn.isFieldPresent (sfTarget))
{
Account const target_account (mTxn.getFieldAccount160 (sfTarget));
SLE::pointer sleTarget = mEngine->entryCache (ltACCOUNT_ROOT,
Ledger::getAccountRootIndex (target_account));
// Destination account does not exist.
if (!sleTarget)
return tecNO_TARGET;
// The issuing account is the default account to which the ticket
// applies so don't bother saving it if that's what's specified.
if (target_account != mTxnAccountID)
sleTicket->setFieldAccount (sfTarget, target_account);
}
std::uint64_t hint;
auto describer = [&](SLE::pointer p, bool b)
{
Ledger::ownerDirDescriber(p, b, mTxnAccountID);
};
TER result = mEngine->view ().dirAdd (
hint,
Ledger::getOwnerDirIndex (mTxnAccountID),
sleTicket->getIndex (),
describer);
m_journal.trace <<
"Creating ticket " << to_string (sleTicket->getIndex ()) <<
": " << transHuman (result);
if (result != tesSUCCESS)
return result;
sleTicket->setFieldU64(sfOwnerNode, hint);
// If we succeeded, the new entry counts agains the creator's reserve.
mEngine->view ().incrementOwnerCount (mTxnAccount);
return result;
}
// Take as much as possible. Adjusts account balances. Charges fees on top to taker.
// --> uBookBase: The order book to take against.
// --> saTakerPays: What the taker offers (w/ issuer)
// --> saTakerGets: What the taker wanted (w/ issuer)
// <-- saTakerPaid: What taker could have paid including saved not including fees. To reduce an offer.
// <-- saTakerGot: What taker got not including fees. To reduce an offer.
// <-- terResult: tesSUCCESS, terNO_ACCOUNT, telFAILED_PROCESSING, or tecFAILED_PROCESSING
// <-- bUnfunded: if tesSUCCESS, consider offer unfunded after taking.
TER OfferCreateTransactor::takeOffers (
const bool bOpenLedger,
const bool bPassive,
const bool bSell,
uint256 const& uBookBase,
const uint160& uTakerAccountID,
SLE::ref sleTakerAccount,
const STAmount& saTakerPays,
const STAmount& saTakerGets,
STAmount& saTakerPaid,
STAmount& saTakerGot,
bool& bUnfunded)
{
// The book has the most elements. Take the perspective of the book.
// Book is ordered for taker: taker pays / taker gets (smaller is better)
// The order is for the other books currencys for get and pays are opposites.
// We want the same ratio for the respective currencies.
// So we swap paid and gets for determing take quality.
assert (saTakerPays && saTakerGets);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: bSell: " << bSell << ": against book: " << uBookBase.ToString ();
LedgerEntrySet& lesActive = mEngine->getNodes ();
const uint64 uTakeQuality = STAmount::getRate (saTakerGets, saTakerPays);
STAmount saTakerRate = STAmount::setRate (uTakeQuality);
const uint160 uTakerPaysAccountID = saTakerPays.getIssuer ();
const uint160 uTakerGetsAccountID = saTakerGets.getIssuer ();
TER terResult = temUNCERTAIN;
boost::unordered_set<uint256> usOfferUnfundedBecame; // Offers that became unfunded.
boost::unordered_set<uint160> usAccountTouched; // Accounts touched.
saTakerPaid = STAmount (saTakerPays.getCurrency (), saTakerPays.getIssuer ());
saTakerGot = STAmount (saTakerGets.getCurrency (), saTakerGets.getIssuer ());
bUnfunded = false;
OrderBookIterator bookIterator (lesActive,
saTakerPays.getCurrency(), saTakerPays.getIssuer(),
saTakerGets.getCurrency(), saTakerGets.getIssuer());
while ((temUNCERTAIN == terResult) && bookIterator.nextOffer())
{
STAmount saTakerFunds = lesActive.accountFunds (uTakerAccountID, saTakerPays);
STAmount saSubTakerPays = saTakerPays - saTakerPaid; // How much more to spend.
STAmount saSubTakerGets = saTakerGets - saTakerGot; // How much more is wanted.
uint64 uTipQuality = bookIterator.getCurrentQuality();
if (!saTakerFunds.isPositive ())
{
// Taker is out of funds. Don't create the offer.
bUnfunded = true;
terResult = tesSUCCESS;
}
else if (!saSubTakerPays.isPositive() || !saSubTakerGets.isPositive())
{
// Offer is completely consumed
terResult = tesSUCCESS;
}
else if ((uTakeQuality < uTipQuality)
|| (bPassive && uTakeQuality == uTipQuality))
{
// Offer does not cross this offer
STAmount saTipRate = STAmount::setRate (uTipQuality);
WriteLog (lsDEBUG, OfferCreateTransactor) << boost::str (boost::format ("takeOffers: done: uTakeQuality=%d %c uTipQuality=%d saTakerRate=%s %c saTipRate=%s bPassive=%d")
% uTakeQuality
% (uTakeQuality == uTipQuality
? '='
: uTakeQuality < uTipQuality
? '<'
: '>')
% uTipQuality
% saTakerRate
% (saTakerRate == saTipRate
? '='
: saTakerRate < saTipRate
? '<'
: '>')
% saTipRate
% bPassive);
terResult = tesSUCCESS;
}
else
{
// We have a crossing offer to consider.
SLE::pointer sleOffer = bookIterator.getCurrentOffer ();
if (!sleOffer)
{ // offer is in directory but not in ledger
uint256 offerIndex = bookIterator.getCurrentIndex ();
WriteLog (lsWARNING, OfferCreateTransactor) << "takeOffers: offer not found : " << offerIndex;
usMissingOffers.insert (missingOffer_t (
bookIterator.getCurrentIndex (), bookIterator.getCurrentDirectory ()));
}
else
{
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: considering offer : " << sleOffer->getJson (0);
const uint160& uOfferOwnerID = sleOffer->getFieldAccount160 (sfAccount);
STAmount saOfferPays = sleOffer->getFieldAmount (sfTakerGets);
STAmount saOfferGets = sleOffer->getFieldAmount (sfTakerPays);
STAmount saOfferFunds; // Funds of offer owner to payout.
bool bValid;
bValid = bValidOffer (
sleOffer, uOfferOwnerID, saOfferPays, saOfferGets,
uTakerAccountID,
usOfferUnfundedFound, usOfferUnfundedBecame, usAccountTouched,
saOfferFunds);
if (bValid)
{
STAmount saSubTakerPaid;
STAmount saSubTakerGot;
STAmount saTakerIssuerFee;
STAmount saOfferIssuerFee;
STAmount saOfferRate = STAmount::setRate (uTipQuality);
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerPays: " << saTakerPays.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerPaid: " << saTakerPaid.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerFunds: " << saTakerFunds.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferFunds: " << saOfferFunds.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferPays: " << saOfferPays.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferGets: " << saOfferGets.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saOfferRate: " << saOfferRate.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerPays: " << saSubTakerPays.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerGets: " << saSubTakerGets.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerPays: " << saTakerPays.getFullText ();
WriteLog (lsTRACE, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerGets: " << saTakerGets.getFullText ();
bool bOfferDelete = STAmount::applyOffer (
bSell,
lesActive.rippleTransferRate (uTakerAccountID, uOfferOwnerID, uTakerPaysAccountID),
lesActive.rippleTransferRate (uOfferOwnerID, uTakerAccountID, uTakerGetsAccountID),
saOfferRate,
saOfferFunds,
saTakerFunds,
saOfferPays,
saOfferGets,
saSubTakerPays,
saSubTakerGets,
saSubTakerPaid,
saSubTakerGot,
saTakerIssuerFee,
saOfferIssuerFee);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerPaid: " << saSubTakerPaid.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerGot: " << saSubTakerGot.getFullText ();
// Adjust offer
// Offer owner will pay less. Subtract what taker just got.
sleOffer->setFieldAmount (sfTakerGets, saOfferPays -= saSubTakerGot);
// Offer owner will get less. Subtract what owner just paid.
sleOffer->setFieldAmount (sfTakerPays, saOfferGets -= saSubTakerPaid);
mEngine->entryModify (sleOffer);
if (bOfferDelete)
{
// Offer now fully claimed or now unfunded.
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: Offer claimed: Delete.";
usOfferUnfundedBecame.insert (sleOffer->getIndex()); // Delete unfunded offer on success.
// Offer owner's account is no longer pristine.
usAccountTouched.insert (uOfferOwnerID);
}
else if (saSubTakerGot)
{
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: Offer partial claim.";
if (!saOfferPays.isPositive () || !saOfferGets.isPositive ())
{
WriteLog (lsWARNING, OfferCreateTransactor) << "takeOffers: ILLEGAL OFFER RESULT.";
bUnfunded = true;
terResult = bOpenLedger ? telFAILED_PROCESSING : tecFAILED_PROCESSING;
}
}
else
{
// Taker got nothing, probably due to rounding. Consider taker unfunded.
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: No claim.";
bUnfunded = true;
terResult = tesSUCCESS; // Done.
}
assert (uTakerGetsAccountID == saSubTakerGot.getIssuer ());
assert (uTakerPaysAccountID == saSubTakerPaid.getIssuer ());
if (!bUnfunded)
{
// Distribute funds. The sends charge appropriate fees which are implied by offer.
terResult = lesActive.accountSend (uOfferOwnerID, uTakerAccountID, saSubTakerGot); // Offer owner pays taker.
if (tesSUCCESS == terResult)
terResult = lesActive.accountSend (uTakerAccountID, uOfferOwnerID, saSubTakerPaid); // Taker pays offer owner.
if (bSell)
{
// Sell semantics:
// Reduce amount considered received to original offer's rate.
// Not by crossing rate, which is higher.
STAmount saEffectiveGot = STAmount::divide(saSubTakerPaid, saTakerRate, saTakerGets);
saSubTakerGot = std::min(saEffectiveGot, saSubTakerGot);
}
else
{
// Buy semantics: Reduce amount considered paid by taker's rate. Not by actual cost which is lower.
// That is, take less as to just satify our buy requirement.
STAmount saTakerCould = saTakerPays - saTakerPaid; // Taker could pay.
if (saTakerFunds < saTakerCould)
saTakerCould = saTakerFunds;
STAmount saTakerUsed = STAmount::multiply (saSubTakerGot, saTakerRate, saTakerPays);
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerCould: " << saTakerCould.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saSubTakerGot: " << saSubTakerGot.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerRate: " << saTakerRate.getFullText ();
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: applyOffer: saTakerUsed: " << saTakerUsed.getFullText ();
saSubTakerPaid = std::min (saTakerCould, saTakerUsed);
}
saTakerPaid += saSubTakerPaid;
saTakerGot += saSubTakerGot;
if (tesSUCCESS == terResult)
terResult = temUNCERTAIN;
}
}
}
}
}
if (temUNCERTAIN == terResult)
terResult = tesSUCCESS;
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: " << transToken (terResult);
if (tesSUCCESS == terResult)
{
// On success, delete offers that became unfunded.
BOOST_FOREACH (uint256 const & uOfferIndex, usOfferUnfundedBecame)
{
WriteLog (lsDEBUG, OfferCreateTransactor) << "takeOffers: became unfunded: " << uOfferIndex.ToString ();
terResult = lesActive.offerDelete (uOfferIndex);
if (tesSUCCESS != terResult)
break;
}