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Don't let offer taker spend savings.

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Arthur Britto
2013-01-27 11:52:02 -08:00
parent 1cbe6be1bd
commit 26a3cebf2e
2 changed files with 22 additions and 26 deletions
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46
src/cpp/ripple/OfferCreateTransactor.cpp
View File

@@ -8,13 +8,13 @@
SETUP_LOG();
// 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 paid not including fees. To reduce an offer.
// <-- saTakerGot: What taker got not including fees. To reduce an offer.
// <-- terResult: tesSUCCESS or terNO_ACCOUNT
// <-- bUnfunded: if tesSUCCESS, consider offer unfunded after taking.
// --> uBookBase: The order book to take against.
// --> saTakerPays: What the taker offers (w/ issuer)
// --> saTakerGets: What the taker wanted (w/ issuer)
// <-- saTakerPaid: What taker paid including saved not including fees. To reduce an offer.
// <-- saTakerGot: What taker got not including fees. To reduce an offer.
// <-- terResult: tesSUCCESS or terNO_ACCOUNT
// <-- bUnfunded: if tesSUCCESS, consider offer unfunded after taking.
TER OfferCreateTransactor::takeOffers(
bool bPassive,
const uint256& uBookBase,
@@ -33,6 +33,7 @@ TER OfferCreateTransactor::takeOffers(
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;
@@ -41,9 +42,9 @@ TER OfferCreateTransactor::takeOffers(
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;
saTakerPaid = STAmount(saTakerPays.getCurrency(), saTakerPays.getIssuer());
saTakerGot = STAmount(saTakerGets.getCurrency(), saTakerGets.getIssuer());
bUnfunded = false;
while (temUNCERTAIN == terResult)
{
@@ -51,10 +52,9 @@ TER OfferCreateTransactor::takeOffers(
uint64 uTipQuality;
// Figure out next offer to take, if needed.
if (saTakerGets != saTakerGot && saTakerPays != saTakerPaid)
if (saTakerGot < saTakerGets // Have less than wanted.
&& saTakerPaid < saTakerPays) // Didn't spend all funds.
{
// Taker, still, needs to get and pay.
sleOfferDir = mEngine->entryCache(ltDIR_NODE, mEngine->getLedger()->getNextLedgerIndex(uTipIndex, uBookEnd));
if (sleOfferDir)
{
@@ -219,24 +219,20 @@ TER OfferCreateTransactor::takeOffers(
if (!bUnfunded)
{
// Offer owner pays taker.
// saSubTakerGot.setIssuer(uTakerGetsAccountID); // XXX Move this earlier?
terResult = mEngine->getNodes().accountSend(uOfferOwnerID, uTakerAccountID, saSubTakerGot);
terResult = mEngine->getNodes().accountSend(uOfferOwnerID, uTakerAccountID, saSubTakerGot); // Offer owner pays taker.
if (tesSUCCESS == terResult)
terResult = mEngine->getNodes().accountSend(uOfferOwnerID, uTakerGetsAccountID, saOfferIssuerFee);
// Taker pays offer owner.
// saSubTakerPaid.setIssuer(uTakerPaysAccountID);
terResult = mEngine->getNodes().accountSend(uOfferOwnerID, uTakerGetsAccountID, saOfferIssuerFee); // Offer owner pays issuer transfer fee.
if (tesSUCCESS == terResult)
terResult = mEngine->getNodes().accountSend(uTakerAccountID, uOfferOwnerID, saSubTakerPaid);
terResult = mEngine->getNodes().accountSend(uTakerAccountID, uOfferOwnerID, saSubTakerPaid); // Taker pays offer owner.
if (tesSUCCESS == terResult)
terResult = mEngine->getNodes().accountSend(uTakerAccountID, uTakerPaysAccountID, saTakerIssuerFee);
terResult = mEngine->getNodes().accountSend(uTakerAccountID, uTakerPaysAccountID, saTakerIssuerFee); // Taker pays issuer transfer fee.
saTakerGot += saSubTakerGot;
saTakerPaid += saSubTakerPaid;
// Reduce amount considered paid by taker's rate (not actual cost).
saTakerPaid += std::min(saPay, STAmount::multiply(saSubTakerGot, saTakerRate, saPay));
saTakerGot += saSubTakerGot;
if (tesSUCCESS == terResult)
terResult = temUNCERTAIN;
@@ -394,7 +390,7 @@ TER OfferCreateTransactor::doApply()
mTxnAccount,
saTakerGets,
saTakerPays,
saOfferPaid, // How much was spent.
saOfferPaid, // How much would have spent at full price.
saOfferGot, // How much was got.
bUnfunded);

2
test/offer-test.js
View File

@@ -74,7 +74,7 @@ buster.testCase("Offer tests", {
});
},
"offer create then crossing offer, no trust lines with self" :
"Offer create then self crossing offer, no trust lines with self" :
function (done) {
var self = this;