TER TrustSetTransactor::doApply ()
{
TER terResult = tesSUCCESS;
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet>";
const STAmount saLimitAmount = mTxn.getFieldAmount (sfLimitAmount);
const bool bQualityIn = mTxn.isFieldPresent (sfQualityIn);
const bool bQualityOut = mTxn.isFieldPresent (sfQualityOut);
const uint160 uCurrencyID = saLimitAmount.getCurrency ();
uint160 uDstAccountID = saLimitAmount.getIssuer ();
const bool bHigh = mTxnAccountID > uDstAccountID; // true, iff current is high account.
uint32 uQualityIn = bQualityIn ? mTxn.getFieldU32 (sfQualityIn) : 0;
uint32 uQualityOut = bQualityOut ? mTxn.getFieldU32 (sfQualityOut) : 0;
if (!saLimitAmount.isLegalNet ())
return temBAD_AMOUNT;
if (bQualityIn && QUALITY_ONE == uQualityIn)
uQualityIn = 0;
if (bQualityOut && QUALITY_ONE == uQualityOut)
uQualityOut = 0;
const uint32 uTxFlags = mTxn.getFlags ();
if (uTxFlags & tfTrustSetMask)
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Malformed transaction: Invalid flags set.";
return temINVALID_FLAG;
}
const bool bSetAuth = isSetBit (uTxFlags, tfSetfAuth);
const bool bSetNoRipple = isSetBit (uTxFlags, tfSetNoRipple);
const bool bClearNoRipple = isSetBit (uTxFlags, tfClearNoRipple);
if (bSetAuth && !isSetBit (mTxnAccount->getFieldU32 (sfFlags), lsfRequireAuth))
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Retry: Auth not required.";
return tefNO_AUTH_REQUIRED;
}
if (saLimitAmount.isNative ())
{
WriteLog (lsINFO, TrustSetTransactor) << boost::str (boost::format ("doTrustSet: Malformed transaction: Native credit limit: %s")
% saLimitAmount.getFullText ());
return temBAD_LIMIT;
}
if (saLimitAmount.isNegative ())
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Malformed transaction: Negative credit limit.";
return temBAD_LIMIT;
}
// Check if destination makes sense.
if (!uDstAccountID || uDstAccountID == ACCOUNT_ONE)
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Malformed transaction: Destination account not specified.";
return temDST_NEEDED;
}
if (mTxnAccountID == uDstAccountID)
{
SLE::pointer selDelete = mEngine->entryCache (ltRIPPLE_STATE, Ledger::getRippleStateIndex (mTxnAccountID, uDstAccountID, uCurrencyID));
if (selDelete)
{
WriteLog (lsWARNING, TrustSetTransactor) << "doTrustSet: Clearing redundant line.";
return mEngine->getNodes ().trustDelete (selDelete, mTxnAccountID, uDstAccountID);
}
else
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Malformed transaction: Can not extend credit to self.";
return temDST_IS_SRC;
}
}
SLE::pointer sleDst = mEngine->entryCache (ltACCOUNT_ROOT, Ledger::getAccountRootIndex (uDstAccountID));
if (!sleDst)
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Delay transaction: Destination account does not exist.";
return tecNO_DST;
}
const uint32 uOwnerCount = mTxnAccount->getFieldU32 (sfOwnerCount);
// The reserve required to create the line.
const uint64 uReserveCreate = (uOwnerCount < 2) ? 0 : mEngine->getLedger ()->getReserve (uOwnerCount + 1);
STAmount saLimitAllow = saLimitAmount;
saLimitAllow.setIssuer (mTxnAccountID);
SLE::pointer sleRippleState = mEngine->entryCache (ltRIPPLE_STATE, Ledger::getRippleStateIndex (mTxnAccountID, uDstAccountID, uCurrencyID));
if (sleRippleState)
{
STAmount saLowBalance;
STAmount saLowLimit;
STAmount saHighBalance;
STAmount saHighLimit;
uint32 uLowQualityIn;
uint32 uLowQualityOut;
uint32 uHighQualityIn;
uint32 uHighQualityOut;
const uint160& uLowAccountID = !bHigh ? mTxnAccountID : uDstAccountID;
const uint160& uHighAccountID = bHigh ? mTxnAccountID : uDstAccountID;
SLE::ref sleLowAccount = !bHigh ? mTxnAccount : sleDst;
SLE::ref sleHighAccount = bHigh ? mTxnAccount : sleDst;
//
// Balances
//
saLowBalance = sleRippleState->getFieldAmount (sfBalance);
saHighBalance = -saLowBalance;
//
// Limits
//
sleRippleState->setFieldAmount (!bHigh ? sfLowLimit : sfHighLimit, saLimitAllow);
saLowLimit = !bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfLowLimit);
saHighLimit = bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfHighLimit);
//
// Quality in
//
if (!bQualityIn)
{
// Not setting. Just get it.
uLowQualityIn = sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = sleRippleState->getFieldU32 (sfHighQualityIn);
}
else if (uQualityIn)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityIn : sfHighQualityIn, uQualityIn);
uLowQualityIn = !bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfHighQualityIn);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityIn : sfHighQualityIn);
uLowQualityIn = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityIn);
}
if (QUALITY_ONE == uLowQualityIn) uLowQualityIn = 0;
if (QUALITY_ONE == uHighQualityIn) uHighQualityIn = 0;
//
// Quality out
//
if (!bQualityOut)
{
// Not setting. Just get it.
uLowQualityOut = sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = sleRippleState->getFieldU32 (sfHighQualityOut);
}
else if (uQualityOut)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityOut : sfHighQualityOut, uQualityOut);
uLowQualityOut = !bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfHighQualityOut);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityOut : sfHighQualityOut);
uLowQualityOut = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityOut);
}
const uint32 uFlagsIn = sleRippleState->getFieldU32 (sfFlags);
uint32 uFlagsOut = uFlagsIn;
if (bSetNoRipple && !bClearNoRipple && (bHigh ? saHighBalance : saLowBalance).isGEZero())
{
uFlagsOut |= (bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
else if (bClearNoRipple && !bSetNoRipple)
{
uFlagsOut &= ~(bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
if (QUALITY_ONE == uLowQualityOut) uLowQualityOut = 0;
if (QUALITY_ONE == uHighQualityOut) uHighQualityOut = 0;
const bool bLowReserveSet = uLowQualityIn || uLowQualityOut ||
isSetBit (uFlagsOut, lsfLowNoRipple) ||
!!saLowLimit || saLowBalance.isPositive ();
const bool bLowReserveClear = !bLowReserveSet;
const bool bHighReserveSet = uHighQualityIn || uHighQualityOut ||
isSetBit (uFlagsOut, lsfHighNoRipple) ||
!!saHighLimit || saHighBalance.isPositive ();
const bool bHighReserveClear = !bHighReserveSet;
const bool bDefault = bLowReserveClear && bHighReserveClear;
const bool bLowReserved = isSetBit (uFlagsIn, lsfLowReserve);
const bool bHighReserved = isSetBit (uFlagsIn, lsfHighReserve);
bool bReserveIncrease = false;
if (bSetAuth)
{
uFlagsOut |= (bHigh ? lsfHighAuth : lsfLowAuth);
}
if (bLowReserveSet && !bLowReserved)
{
// Set reserve for low account.
mEngine->getNodes ().ownerCountAdjust (uLowAccountID, 1, sleLowAccount);
uFlagsOut |= lsfLowReserve;
if (!bHigh)
bReserveIncrease = true;
}
if (bLowReserveClear && bLowReserved)
{
// Clear reserve for low account.
mEngine->getNodes ().ownerCountAdjust (uLowAccountID, -1, sleLowAccount);
uFlagsOut &= ~lsfLowReserve;
}
if (bHighReserveSet && !bHighReserved)
{
// Set reserve for high account.
mEngine->getNodes ().ownerCountAdjust (uHighAccountID, 1, sleHighAccount);
uFlagsOut |= lsfHighReserve;
if (bHigh)
bReserveIncrease = true;
}
if (bHighReserveClear && bHighReserved)
{
// Clear reserve for high account.
mEngine->getNodes ().ownerCountAdjust (uHighAccountID, -1, sleHighAccount);
uFlagsOut &= ~lsfHighReserve;
}
if (uFlagsIn != uFlagsOut)
sleRippleState->setFieldU32 (sfFlags, uFlagsOut);
if (bDefault || CURRENCY_BAD == uCurrencyID)
{
// Delete.
terResult = mEngine->getNodes ().trustDelete (sleRippleState, uLowAccountID, uHighAccountID);
}
else if (bReserveIncrease
&& mPriorBalance.getNValue () < uReserveCreate) // Reserve is not scaled by load.
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Delay transaction: Insufficent reserve to add trust line.";
// Another transaction could provide XRP to the account and then this transaction would succeed.
terResult = tecINSUF_RESERVE_LINE;
}
else
{
mEngine->entryModify (sleRippleState);
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Modify ripple line";
}
}
// Line does not exist.
else if (!saLimitAmount // Setting default limit.
&& (!bQualityIn || !uQualityIn) // Not setting quality in or setting default quality in.
&& (!bQualityOut || !uQualityOut)) // Not setting quality out or setting default quality out.
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Redundant: Setting non-existent ripple line to defaults.";
return tecNO_LINE_REDUNDANT;
}
else if (mPriorBalance.getNValue () < uReserveCreate) // Reserve is not scaled by load.
{
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Delay transaction: Line does not exist. Insufficent reserve to create line.";
// Another transaction could create the account and then this transaction would succeed.
terResult = tecNO_LINE_INSUF_RESERVE;
}
else if (CURRENCY_BAD == uCurrencyID)
{
terResult = temBAD_CURRENCY;
}
else
{
STAmount saBalance = STAmount (uCurrencyID, ACCOUNT_ONE); // Zero balance in currency.
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet: Creating ripple line: "
<< Ledger::getRippleStateIndex (mTxnAccountID, uDstAccountID, uCurrencyID).ToString ();
// Create a new ripple line.
terResult = mEngine->getNodes ().trustCreate (
bHigh,
mTxnAccountID,
uDstAccountID,
Ledger::getRippleStateIndex (mTxnAccountID, uDstAccountID, uCurrencyID),
mTxnAccount,
bSetAuth,
bSetNoRipple && !bClearNoRipple,
saBalance,
saLimitAllow, // Limit for who is being charged.
uQualityIn,
uQualityOut);
}
WriteLog (lsINFO, TrustSetTransactor) << "doTrustSet<";
return terResult;
}
TER doApply () override
{
// Divvy if source or destination is non-native or if there are paths.
std::uint32_t const uTxFlags = mTxn.getFlags ();
bool const partialPaymentAllowed = uTxFlags & tfPartialPayment;
bool const limitQuality = uTxFlags & tfLimitQuality;
bool const defaultPathsAllowed = !(uTxFlags & tfNoDivvyDirect);
bool const bPaths = mTxn.isFieldPresent (sfPaths);
bool const bMax = mTxn.isFieldPresent (sfSendMax);
AccountID const uDstAccountID (mTxn.getFieldAccount160 (sfDestination));
STAmount const saDstAmount (mTxn.getFieldAmount (sfAmount));
STAmount maxSourceAmount;
if (bMax)
maxSourceAmount = mTxn.getFieldAmount (sfSendMax);
else if (saDstAmount.native ())
maxSourceAmount = saDstAmount;
else
maxSourceAmount = STAmount (
{saDstAmount.getCurrency (), mTxnAccountID},
saDstAmount.mantissa(), saDstAmount.exponent (),
saDstAmount < zero);
m_journal.trace <<
"maxSourceAmount=" << maxSourceAmount.getFullText () <<
" saDstAmount=" << saDstAmount.getFullText ();
// Open a ledger for editing.
auto const index = getAccountRootIndex (uDstAccountID);
SLE::pointer sleDst (mEngine->view().entryCache (ltACCOUNT_ROOT, index));
if (!sleDst)
{
// Destination account does not exist.
if (!saDstAmount.native ())
{
m_journal.trace <<
"Delay transaction: Destination account does not exist.";
// Another transaction could create the account and then this
// transaction would succeed.
return tecNO_DST;
}
else if (mParams & tapOPEN_LEDGER && partialPaymentAllowed)
{
// You cannot fund an account with a partial payment.
// Make retry work smaller, by rejecting this.
m_journal.trace <<
"Delay transaction: Partial payment not allowed to create account.";
// Another transaction could create the account and then this
// transaction would succeed.
return telNO_DST_PARTIAL;
}
else if (saDstAmount < STAmount (mEngine->getLedger ()->getReserve (0)))
{
// getReserve() is the minimum amount that an account can have.
// Reserve is not scaled by load.
m_journal.trace <<
"Delay transaction: Destination account does not exist. " <<
"Insufficent payment to create account.";
// TODO: dedupe
// Another transaction could create the account and then this
// transaction would succeed.
return tecNO_DST_INSUF_XDV;
}
// Create the account.
sleDst = std::make_shared<SLE>(ltACCOUNT_ROOT,
getAccountRootIndex (uDstAccountID));
sleDst->setFieldAccount (sfAccount, uDstAccountID);
sleDst->setFieldU32 (sfSequence, 1);
mEngine->view().entryCreate(sleDst);
}
else if ((sleDst->getFlags () & lsfRequireDestTag) &&
!mTxn.isFieldPresent (sfDestinationTag))
{
// The tag is basically account-specific information we don't
// understand, but we can require someone to fill it in.
// We didn't make this test for a newly-formed account because there's
// no way for this field to be set.
m_journal.trace << "Malformed transaction: DestinationTag required.";
return tecDST_TAG_NEEDED;
}
else
{
// Tell the engine that we are intending to change the the destination
// account. The source account gets always charged a fee so it's always
// marked as modified.
mEngine->view().entryModify (sleDst);
}
TER terResult;
bool const bDivvy = bPaths || bMax || !saDstAmount.native ();
// XXX Should bMax be sufficient to imply divvy?
if (bDivvy)
{
// Divvy payment with at least one intermediate step and uses
// transitive balances.
// Copy paths into an editable class.
STPathSet spsPaths = mTxn.getFieldPathSet (sfPaths);
try
{
path::DivvyCalc::Input rcInput;
rcInput.partialPaymentAllowed = partialPaymentAllowed;
rcInput.defaultPathsAllowed = defaultPathsAllowed;
rcInput.limitQuality = limitQuality;
rcInput.deleteUnfundedOffers = true;
rcInput.isLedgerOpen = static_cast<bool>(mParams & tapOPEN_LEDGER);
bool pathTooBig = spsPaths.size () > MaxPathSize;
for (auto const& path : spsPaths)
if (path.size () > MaxPathLength)
pathTooBig = true;
if (rcInput.isLedgerOpen && pathTooBig)
{
terResult = telBAD_PATH_COUNT; // Too many paths for proposed ledger.
}
else
{
path::DivvyCalc::Output rc;
{
ScopedDeferCredits g (mEngine->view ());
rc = path::DivvyCalc::divvyCalculate (
mEngine->view (),
maxSourceAmount,
saDstAmount,
uDstAccountID,
mTxnAccountID,
spsPaths,
&rcInput);
}
// TODO: is this right? If the amount is the correct amount, was
// the delivered amount previously set?
if (rc.result () == tesSUCCESS && rc.actualAmountOut != saDstAmount)
mEngine->view ().setDeliveredAmount (rc.actualAmountOut);
terResult = rc.result ();
}
// TODO(tom): what's going on here?
if (isTerRetry (terResult))
terResult = tecPATH_DRY;
}
catch (std::exception const& e)
{
m_journal.trace <<
"Caught throw: " << e.what ();
terResult = tefEXCEPTION;
}
}
else
{
// Direct XDV payment.
// uOwnerCount is the number of entries in this legder for this
// account that require a reserve.
auto const uOwnerCount = mTxnAccount->getFieldU32 (sfOwnerCount);
// This is the total reserve in drops.
std::uint64_t const uReserve =
mEngine->getLedger ()->getReserve (uOwnerCount);
// mPriorBalance is the balance on the sending account BEFORE the
// fees were charged. We want to make sure we have enough reserve
// to send. Allow final spend to use reserve for fee.
auto const mmm = std::max(mTxn.getTransactionFee (),
STAmount (uReserve));
if (mPriorBalance < saDstAmount + mmm)
{
// Vote no. However the transaction might succeed, if applied in
// a different order.
m_journal.trace << "Delay transaction: Insufficient funds: " <<
" " << mPriorBalance.getText () <<
" / " << (saDstAmount + mmm).getText () <<
" (" << uReserve << ")";
terResult = tecUNFUNDED_PAYMENT;
}
else
{
// The source account does have enough money, so do the
// arithmetic for the transfer and make the ledger change.
mTxnAccount->setFieldAmount (sfBalance,
mSourceBalance - saDstAmount);
sleDst->setFieldAmount (sfBalance,
sleDst->getFieldAmount (sfBalance) + saDstAmount);
// Re-arm the password change fee if we can and need to.
if ((sleDst->getFlags () & lsfPasswordSpent))
sleDst->clearFlag (lsfPasswordSpent);
terResult = tesSUCCESS;
}
}
std::string strToken;
std::string strHuman;
if (transResultInfo (terResult, strToken, strHuman))
{
m_journal.trace <<
strToken << ": " << strHuman;
}
else
{
assert (false);
}
return terResult;
}
// 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;
}
// Append a node and insert before it any implied nodes.
// Offers may go back to back.
// <-- terResult: tesSUCCESS, temBAD_PATH, terNO_ACCOUNT, terNO_AUTH, terNO_LINE, tecPATH_DRY
TER PathState::pushNode (
const int iType,
const uint160& uAccountID,
const uint160& uCurrencyID,
const uint160& uIssuerID)
{
Node pnCur;
const bool bFirst = vpnNodes.empty ();
const Node& pnPrv = bFirst ? Node () : vpnNodes.back ();
// true, iff node is a ripple account. false, iff node is an offer node.
const bool bAccount = is_bit_set (iType, STPathElement::typeAccount);
// true, iff currency supplied.
// Currency is specified for the output of the current node.
const bool bCurrency = is_bit_set (iType, STPathElement::typeCurrency);
// Issuer is specified for the output of the current node.
const bool bIssuer = is_bit_set (iType, STPathElement::typeIssuer);
TER terResult = tesSUCCESS;
WriteLog (lsTRACE, RippleCalc) << "pushNode> " <<
iType <<
": " << (bAccount ? RippleAddress::createHumanAccountID (uAccountID) : "-") <<
" " << (bCurrency ? STAmount::createHumanCurrency (uCurrencyID) : "-") <<
"/" << (bIssuer ? RippleAddress::createHumanAccountID (uIssuerID) : "-");
pnCur.uFlags = iType;
pnCur.uCurrencyID = bCurrency ? uCurrencyID : pnPrv.uCurrencyID;
if (iType & ~STPathElement::typeValidBits)
{
WriteLog (lsDEBUG, RippleCalc) << "pushNode: bad bits.";
terResult = temBAD_PATH;
}
else if (bIssuer && !pnCur.uCurrencyID)
{
WriteLog (lsDEBUG, RippleCalc) << "pushNode: issuer specified for XRP.";
terResult = temBAD_PATH;
}
else if (bIssuer && !uIssuerID)
{
WriteLog (lsDEBUG, RippleCalc) << "pushNode: specified bad issuer.";
terResult = temBAD_PATH;
}
else if (!bAccount && !bCurrency && !bIssuer)
{
WriteLog (lsDEBUG, RippleCalc) << "pushNode: offer must specify at least currency or issuer.";
terResult = temBAD_PATH;
}
else if (bAccount)
{
// Account link
pnCur.uAccountID = uAccountID;
pnCur.uIssuerID = bIssuer
? uIssuerID
: !!pnCur.uCurrencyID
? uAccountID
: ACCOUNT_XRP;
pnCur.saRevRedeem = STAmount (pnCur.uCurrencyID, uAccountID);
pnCur.saRevIssue = STAmount (pnCur.uCurrencyID, uAccountID);
pnCur.saRevDeliver = STAmount (pnCur.uCurrencyID, pnCur.uIssuerID);
pnCur.saFwdDeliver = pnCur.saRevDeliver;
if (bFirst)
{
// The first node is always correct as is.
nothing ();
}
else if (!uAccountID)
{
WriteLog (lsDEBUG, RippleCalc) << "pushNode: specified bad account.";
terResult = temBAD_PATH;
}
else
{
// Add required intermediate nodes to deliver to current account.
WriteLog (lsTRACE, RippleCalc) << "pushNode: imply for account.";
terResult = pushImply (
pnCur.uAccountID, // Current account.
pnCur.uCurrencyID, // Wanted currency.
!!pnCur.uCurrencyID ? uAccountID : ACCOUNT_XRP); // Account as wanted issuer.
// Note: pnPrv may no longer be the immediately previous node.
}
if (tesSUCCESS == terResult && !vpnNodes.empty ())
{
const Node& pnBck = vpnNodes.back ();
bool bBckAccount = is_bit_set (pnBck.uFlags, STPathElement::typeAccount);
if (bBckAccount)
{
SLE::pointer sleRippleState = lesEntries.entryCache (ltRIPPLE_STATE, Ledger::getRippleStateIndex (pnBck.uAccountID, pnCur.uAccountID, pnPrv.uCurrencyID));
if (!sleRippleState)
{
WriteLog (lsTRACE, RippleCalc) << "pushNode: No credit line between "
<< RippleAddress::createHumanAccountID (pnBck.uAccountID)
<< " and "
<< RippleAddress::createHumanAccountID (pnCur.uAccountID)
<< " for "
<< STAmount::createHumanCurrency (pnCur.uCurrencyID)
<< "." ;
WriteLog (lsTRACE, RippleCalc) << getJson ();
terResult = terNO_LINE;
}
else
{
WriteLog (lsTRACE, RippleCalc) << "pushNode: Credit line found between "
<< RippleAddress::createHumanAccountID (pnBck.uAccountID)
<< " and "
<< RippleAddress::createHumanAccountID (pnCur.uAccountID)
<< " for "
<< STAmount::createHumanCurrency (pnCur.uCurrencyID)
<< "." ;
SLE::pointer sleBck = lesEntries.entryCache (ltACCOUNT_ROOT, Ledger::getAccountRootIndex (pnBck.uAccountID));
bool bHigh = pnBck.uAccountID > pnCur.uAccountID;
if (!sleBck)
{
WriteLog (lsWARNING, RippleCalc) << "pushNode: delay: can't receive IOUs from non-existent issuer: " << RippleAddress::createHumanAccountID (pnBck.uAccountID);
terResult = terNO_ACCOUNT;
}
else if ((is_bit_set (sleBck->getFieldU32 (sfFlags), lsfRequireAuth)
&& !is_bit_set (sleRippleState->getFieldU32 (sfFlags), (bHigh ? lsfHighAuth : lsfLowAuth)))
&& sleRippleState->getFieldAmount(sfBalance) == zero) // CHECKME
{
WriteLog (lsWARNING, RippleCalc) << "pushNode: delay: can't receive IOUs from issuer without auth.";
terResult = terNO_AUTH;
}
if (tesSUCCESS == terResult)
{
STAmount saOwed = lesEntries.rippleOwed (pnCur.uAccountID, pnBck.uAccountID, pnCur.uCurrencyID);
STAmount saLimit;
if (saOwed <= zero
&& -saOwed >= (saLimit = lesEntries.rippleLimit (pnCur.uAccountID, pnBck.uAccountID, pnCur.uCurrencyID)))
{
WriteLog (lsWARNING, RippleCalc) <<
"pushNode: dry:" <<
" saOwed=" << saOwed <<
" saLimit=" << saLimit;
terResult = tecPATH_DRY;
}
}
}
}
}
if (tesSUCCESS == terResult)
{
vpnNodes.push_back (pnCur);
}
}
else
{
// Offer link
// Offers bridge a change in currency & issuer or just a change in issuer.
pnCur.uIssuerID = bIssuer
? uIssuerID
: !!pnCur.uCurrencyID
? !!pnPrv.uIssuerID
? pnPrv.uIssuerID // Default to previous issuer
: pnPrv.uAccountID // Or previous account if no previous issuer.
: ACCOUNT_XRP;
pnCur.saRateMax = saZero;
pnCur.saRevDeliver = STAmount (pnCur.uCurrencyID, pnCur.uIssuerID);
pnCur.saFwdDeliver = pnCur.saRevDeliver;
if (!!pnCur.uCurrencyID != !!pnCur.uIssuerID)
{
WriteLog (lsDEBUG, RippleCalc) << "pushNode: currency is inconsistent with issuer.";
terResult = temBAD_PATH;
}
else if (!!pnPrv.uAccountID)
{
// Previous is an account.
WriteLog (lsTRACE, RippleCalc) << "pushNode: imply for offer.";
// Insert intermediary issuer account if needed.
terResult = pushImply (
ACCOUNT_XRP, // Rippling, but offers don't have an account.
pnPrv.uCurrencyID,
pnPrv.uIssuerID);
}
if (tesSUCCESS == terResult)
{
vpnNodes.push_back (pnCur);
}
}
WriteLog (lsTRACE, RippleCalc) << "pushNode< : " << transToken (terResult);
return terResult;
}
TER TransactionEngine::applyTransaction (
STTx const& txn,
TransactionEngineParams params,
bool& didApply)
{
WriteLog (lsTRACE, TransactionEngine) << "applyTransaction>";
didApply = false;
assert (mLedger);
uint256 const& txID = txn.getTransactionID ();
mNodes.init (mLedger, txID, mLedger->getLedgerSeq (), params);
#ifdef BEAST_DEBUG
if (1)
{
Serializer ser;
txn.add (ser);
SerializerIterator sit (ser);
STTx s2 (sit);
if (!s2.isEquivalent (txn))
{
WriteLog (lsFATAL, TransactionEngine) <<
"Transaction serdes mismatch";
WriteLog (lsINFO, TransactionEngine) << txn.getJson (0);
WriteLog (lsFATAL, TransactionEngine) << s2.getJson (0);
assert (false);
}
}
#endif
if (!txID)
{
WriteLog (lsWARNING, TransactionEngine) <<
"applyTransaction: invalid transaction id";
return temINVALID;
}
TER terResult = Transactor::transact (txn, params, this);
if (terResult == temUNKNOWN)
{
WriteLog (lsWARNING, TransactionEngine) <<
"applyTransaction: Invalid transaction: unknown transaction type";
return temUNKNOWN;
}
if (ShouldLog (lsDEBUG, TransactionEngine))
{
std::string strToken;
std::string strHuman;
transResultInfo (terResult, strToken, strHuman);
WriteLog (lsDEBUG, TransactionEngine) <<
"applyTransaction: terResult=" << strToken <<
" : " << terResult <<
" : " << strHuman;
}
if (isTesSuccess (terResult))
didApply = true;
else if (isTecClaim (terResult) && !(params & tapRETRY))
{
// only claim the transaction fee
WriteLog (lsDEBUG, TransactionEngine) << "Reprocessing to only claim fee";
mNodes.clear ();
SLE::pointer txnAcct = entryCache (ltACCOUNT_ROOT,
getAccountRootIndex (txn.getSourceAccount ()));
if (!txnAcct)
terResult = terNO_ACCOUNT;
else
{
std::uint32_t t_seq = txn.getSequence ();
std::uint32_t a_seq = txnAcct->getFieldU32 (sfSequence);
if (a_seq < t_seq)
terResult = terPRE_SEQ;
else if (a_seq > t_seq)
terResult = tefPAST_SEQ;
else
{
STAmount fee = txn.getTransactionFee ();
STAmount balance = txnAcct->getFieldAmount (sfBalance);
STAmount balanceVBC = txnAcct->getFieldAmount(sfBalanceVBC);
// We retry/reject the transaction if the account
// balance is zero or we're applying against an open
// ledger and the balance is less than the fee
if ((balance == zero) || (balanceVBC.getNValue() == 0) ||
((params & tapOPEN_LEDGER) && (balance < fee)))
{
// Account has no funds or ledger is open
terResult = terINSUF_FEE_B;
}
else
{
if (fee > balance)
fee = balance;
txnAcct->setFieldAmount (sfBalance, balance - fee);
txnAcct->setFieldAmount(sfBalanceVBC, balanceVBC);
txnAcct->setFieldU32 (sfSequence, t_seq + 1);
entryModify (txnAcct);
didApply = true;
}
}
}
}
else
WriteLog (lsDEBUG, TransactionEngine) << "Not applying transaction " << txID;
if (didApply)
{
if (!checkInvariants (terResult, txn, params))
{
WriteLog (lsFATAL, TransactionEngine) <<
"Transaction violates invariants";
WriteLog (lsFATAL, TransactionEngine) <<
txn.getJson (0);
WriteLog (lsFATAL, TransactionEngine) <<
transToken (terResult) << ": " << transHuman (terResult);
WriteLog (lsFATAL, TransactionEngine) <<
mNodes.getJson (0);
didApply = false;
terResult = tefINTERNAL;
}
else
{
// Transaction succeeded fully or (retries are not allowed and the
// transaction could claim a fee)
Serializer m;
mNodes.calcRawMeta (m, terResult, mTxnSeq++);
txnWrite ();
Serializer s;
txn.add (s);
if (params & tapOPEN_LEDGER)
{
if (!mLedger->addTransaction (txID, s))
{
WriteLog (lsFATAL, TransactionEngine) <<
"Tried to add transaction to open ledger that already had it";
assert (false);
throw std::runtime_error ("Duplicate transaction applied");
}
}
else
{
if (!mLedger->addTransaction (txID, s, m))
{
WriteLog (lsFATAL, TransactionEngine) <<
"Tried to add transaction to ledger that already had it";
assert (false);
throw std::runtime_error ("Duplicate transaction applied to closed ledger");
}
// Charge whatever fee they specified.
STAmount saPaid = txn.getTransactionFee ();
mLedger->destroyCoins (saPaid.getNValue ());
}
}
}
mTxnAccount.reset ();
mNodes.clear ();
if (!(params & tapOPEN_LEDGER) && isTemMalformed (terResult))
{
// XXX Malformed or failed transaction in closed ledger must bow out.
}
return terResult;
}
// 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;
}
TER doApply () override
{
// Ripple if source or destination is non-native or if there are paths.
std::uint32_t const uTxFlags = mTxn.getFlags ();
bool const partialPaymentAllowed = uTxFlags & tfPartialPayment;
bool const limitQuality = uTxFlags & tfLimitQuality;
bool const defaultPathsAllowed = !(uTxFlags & tfNoRippleDirect);
bool const bPaths = mTxn.isFieldPresent (sfPaths);
bool const bMax = mTxn.isFieldPresent (sfSendMax);
Account const uDstAccountID (mTxn.getFieldAccount160 (sfDestination));
STAmount const saDstAmount (mTxn.getFieldAmount (sfAmount));
STAmount maxSourceAmount;
if (bMax)
maxSourceAmount = mTxn.getFieldAmount (sfSendMax);
else if (saDstAmount.isNative ())
maxSourceAmount = saDstAmount;
else
maxSourceAmount = STAmount (
{saDstAmount.getCurrency (), mTxnAccountID},
saDstAmount.mantissa(), saDstAmount.exponent (),
saDstAmount < zero);
auto const& uSrcCurrency = maxSourceAmount.getCurrency ();
auto const& uDstCurrency = saDstAmount.getCurrency ();
// isZero() is XRP. FIX!
bool const bXRPDirect = uSrcCurrency.isZero () && uDstCurrency.isZero ();
m_journal.trace <<
"maxSourceAmount=" << maxSourceAmount.getFullText () <<
" saDstAmount=" << saDstAmount.getFullText ();
if (!isLegalNet (saDstAmount) || !isLegalNet (maxSourceAmount))
return temBAD_AMOUNT;
if (uTxFlags & tfPaymentMask)
{
m_journal.trace <<
"Malformed transaction: Invalid flags set.";
return temINVALID_FLAG;
}
else if (!uDstAccountID)
{
m_journal.trace <<
"Malformed transaction: Payment destination account not specified.";
return temDST_NEEDED;
}
else if (bMax && maxSourceAmount <= zero)
{
m_journal.trace <<
"Malformed transaction: bad max amount: " << maxSourceAmount.getFullText ();
return temBAD_AMOUNT;
}
else if (saDstAmount <= zero)
{
m_journal.trace <<
"Malformed transaction: bad dst amount: " << saDstAmount.getFullText ();
return temBAD_AMOUNT;
}
else if (badCurrency() == uSrcCurrency || badCurrency() == uDstCurrency)
{
m_journal.trace <<
"Malformed transaction: Bad currency.";
return temBAD_CURRENCY;
}
else if (mTxnAccountID == uDstAccountID && uSrcCurrency == uDstCurrency && !bPaths)
{
// You're signing yourself a payment.
// If bPaths is true, you might be trying some arbitrage.
m_journal.trace <<
"Malformed transaction: Redundant transaction:" <<
" src=" << to_string (mTxnAccountID) <<
" dst=" << to_string (uDstAccountID) <<
" src_cur=" << to_string (uSrcCurrency) <<
" dst_cur=" << to_string (uDstCurrency);
return temREDUNDANT;
}
else if (bMax && maxSourceAmount == saDstAmount &&
maxSourceAmount.getCurrency () == saDstAmount.getCurrency ())
{
// Consistent but redundant transaction.
m_journal.trace <<
"Malformed transaction: Redundant SendMax.";
return temREDUNDANT_SEND_MAX;
}
else if (bXRPDirect && bMax)
{
// Consistent but redundant transaction.
m_journal.trace <<
"Malformed transaction: SendMax specified for XRP to XRP.";
return temBAD_SEND_XRP_MAX;
}
else if (bXRPDirect && bPaths)
{
// XRP is sent without paths.
m_journal.trace <<
"Malformed transaction: Paths specified for XRP to XRP.";
return temBAD_SEND_XRP_PATHS;
}
else if (bXRPDirect && partialPaymentAllowed)
{
// Consistent but redundant transaction.
m_journal.trace <<
"Malformed transaction: Partial payment specified for XRP to XRP.";
return temBAD_SEND_XRP_PARTIAL;
}
else if (bXRPDirect && limitQuality)
{
// Consistent but redundant transaction.
m_journal.trace <<
"Malformed transaction: Limit quality specified for XRP to XRP.";
return temBAD_SEND_XRP_LIMIT;
}
else if (bXRPDirect && !defaultPathsAllowed)
{
// Consistent but redundant transaction.
m_journal.trace <<
"Malformed transaction: No ripple direct specified for XRP to XRP.";
return temBAD_SEND_XRP_NO_DIRECT;
}
//
// Open a ledger for editing.
auto const index = getAccountRootIndex (uDstAccountID);
SLE::pointer sleDst (mEngine->entryCache (ltACCOUNT_ROOT, index));
if (!sleDst)
{
// Destination account does not exist.
if (!saDstAmount.isNative ())
{
m_journal.trace <<
"Delay transaction: Destination account does not exist.";
// Another transaction could create the account and then this
// transaction would succeed.
return tecNO_DST;
}
else if (mParams & tapOPEN_LEDGER && partialPaymentAllowed)
{
// You cannot fund an account with a partial payment.
// Make retry work smaller, by rejecting this.
m_journal.trace <<
"Delay transaction: Partial payment not allowed to create account.";
// Another transaction could create the account and then this
// transaction would succeed.
return telNO_DST_PARTIAL;
}
else if (saDstAmount.getNValue () < mEngine->getLedger ()->getReserve (0))
{
// getReserve() is the minimum amount that an account can have.
// Reserve is not scaled by load.
m_journal.trace <<
"Delay transaction: Destination account does not exist. " <<
"Insufficent payment to create account.";
// TODO: dedupe
// Another transaction could create the account and then this
// transaction would succeed.
return tecNO_DST_INSUF_XRP;
}
// Create the account.
auto const newIndex = getAccountRootIndex (uDstAccountID);
sleDst = mEngine->entryCreate (ltACCOUNT_ROOT, newIndex);
sleDst->setFieldAccount (sfAccount, uDstAccountID);
sleDst->setFieldU32 (sfSequence, 1);
}
else if ((sleDst->getFlags () & lsfRequireDestTag) &&
!mTxn.isFieldPresent (sfDestinationTag))
{
// The tag is basically account-specific information we don't
// understand, but we can require someone to fill it in.
// We didn't make this test for a newly-formed account because there's
// no way for this field to be set.
m_journal.trace << "Malformed transaction: DestinationTag required.";
return tefDST_TAG_NEEDED;
}
else
{
// Tell the engine that we are intending to change the the destination
// account. The source account gets always charged a fee so it's always
// marked as modified.
mEngine->entryModify (sleDst);
}
TER terResult;
bool const bRipple = bPaths || bMax || !saDstAmount.isNative ();
// XXX Should bMax be sufficient to imply ripple?
if (bRipple)
{
// Ripple payment with at least one intermediate step and uses
// transitive balances.
// Copy paths into an editable class.
STPathSet spsPaths = mTxn.getFieldPathSet (sfPaths);
try
{
path::RippleCalc::Input rcInput;
rcInput.partialPaymentAllowed = partialPaymentAllowed;
rcInput.defaultPathsAllowed = defaultPathsAllowed;
rcInput.limitQuality = limitQuality;
rcInput.deleteUnfundedOffers = true;
rcInput.isLedgerOpen = static_cast<bool>(mParams & tapOPEN_LEDGER);
bool pathTooBig = spsPaths.size () > MaxPathSize;
for (auto const& path : spsPaths)
if (path.size () > MaxPathLength)
pathTooBig = true;
if (rcInput.isLedgerOpen && pathTooBig)
{
terResult = telBAD_PATH_COUNT; // Too many paths for proposed ledger.
}
else
{
auto rc = path::RippleCalc::rippleCalculate (
mEngine->view (),
maxSourceAmount,
saDstAmount,
uDstAccountID,
mTxnAccountID,
spsPaths,
&rcInput);
// TODO: is this right? If the amount is the correct amount, was
// the delivered amount previously set?
if (rc.result () == tesSUCCESS && rc.actualAmountOut != saDstAmount)
mEngine->view ().setDeliveredAmount (rc.actualAmountOut);
terResult = rc.result ();
}
// TODO(tom): what's going on here?
if (isTerRetry (terResult))
terResult = tecPATH_DRY;
}
catch (std::exception const& e)
{
m_journal.trace <<
"Caught throw: " << e.what ();
terResult = tefEXCEPTION;
}
}
else
{
// Direct XRP payment.
// uOwnerCount is the number of entries in this legder for this account
// that require a reserve.
std::uint32_t const uOwnerCount (mTxnAccount->getFieldU32 (sfOwnerCount));
// This is the total reserve in drops.
// TODO(tom): there should be a class for this.
std::uint64_t const uReserve (mEngine->getLedger ()->getReserve (uOwnerCount));
// mPriorBalance is the balance on the sending account BEFORE the fees were charged.
//
// Make sure have enough reserve to send. Allow final spend to use
// reserve for fee.
auto const mmm = std::max(uReserve, mTxn.getTransactionFee ().getNValue ());
if (mPriorBalance < saDstAmount + mmm)
{
// Vote no.
// However, transaction might succeed, if applied in a different order.
m_journal.trace << "Delay transaction: Insufficient funds: " <<
" " << mPriorBalance.getText () <<
" / " << (saDstAmount + uReserve).getText () <<
" (" << uReserve << ")";
terResult = tecUNFUNDED_PAYMENT;
}
else
{
// The source account does have enough money, so do the arithmetic
// for the transfer and make the ledger change.
mTxnAccount->setFieldAmount (sfBalance, mSourceBalance - saDstAmount);
sleDst->setFieldAmount (sfBalance, sleDst->getFieldAmount (sfBalance) + saDstAmount);
// Re-arm the password change fee if we can and need to.
if ((sleDst->getFlags () & lsfPasswordSpent))
sleDst->clearFlag (lsfPasswordSpent);
terResult = tesSUCCESS;
}
}
std::string strToken;
std::string strHuman;
if (transResultInfo (terResult, strToken, strHuman))
{
m_journal.trace <<
strToken << ": " << strHuman;
}
else
{
assert (false);
}
return terResult;
}
TER SetTrust::doApply ()
{
TER terResult = tesSUCCESS;
STAmount const saLimitAmount (mTxn.getFieldAmount (sfLimitAmount));
bool const bQualityIn (mTxn.isFieldPresent (sfQualityIn));
bool const bQualityOut (mTxn.isFieldPresent (sfQualityOut));
Currency const currency (saLimitAmount.getCurrency ());
Account uDstAccountID (saLimitAmount.getIssuer ());
// true, iff current is high account.
bool const bHigh = mTxnAccountID > uDstAccountID;
std::uint32_t uQualityIn (bQualityIn ? mTxn.getFieldU32 (sfQualityIn) : 0);
std::uint32_t uQualityOut (bQualityOut ? mTxn.getFieldU32 (sfQualityOut) : 0);
if (!saLimitAmount.isLegalNet ())
return temBAD_AMOUNT;
if (bQualityIn && QUALITY_ONE == uQualityIn)
uQualityIn = 0;
if (bQualityOut && QUALITY_ONE == uQualityOut)
uQualityOut = 0;
std::uint32_t const uTxFlags = mTxn.getFlags ();
if (uTxFlags & tfTrustSetMask)
{
m_journal.trace <<
"Malformed transaction: Invalid flags set.";
return temINVALID_FLAG;
}
bool const bSetAuth = (uTxFlags & tfSetfAuth);
bool const bSetNoRipple = (uTxFlags & tfSetNoRipple);
bool const bClearNoRipple = (uTxFlags & tfClearNoRipple);
bool const bSetFreeze = (uTxFlags & tfSetFreeze);
bool const bClearFreeze = (uTxFlags & tfClearFreeze);
if (bSetAuth && !(mTxnAccount->getFieldU32 (sfFlags) & lsfRequireAuth))
{
m_journal.trace <<
"Retry: Auth not required.";
return tefNO_AUTH_REQUIRED;
}
if (saLimitAmount.isNative ())
{
m_journal.trace <<
"Malformed transaction: Native credit limit: " <<
saLimitAmount.getFullText ();
return temBAD_LIMIT;
}
if (saLimitAmount < zero)
{
m_journal.trace <<
"Malformed transaction: Negative credit limit.";
return temBAD_LIMIT;
}
// Check if destination makes sense.
if (!uDstAccountID || uDstAccountID == noAccount())
{
m_journal.trace <<
"Malformed transaction: Destination account not specified.";
return temDST_NEEDED;
}
if (mTxnAccountID == uDstAccountID)
{
SLE::pointer selDelete (
mEngine->entryCache (ltRIPPLE_STATE,
Ledger::getRippleStateIndex (
mTxnAccountID, uDstAccountID, currency)));
if (selDelete)
{
m_journal.warning <<
"Clearing redundant line.";
return mEngine->view ().trustDelete (
selDelete, mTxnAccountID, uDstAccountID);
}
else
{
m_journal.trace <<
"Malformed transaction: Can not extend credit to self.";
return temDST_IS_SRC;
}
}
SLE::pointer sleDst (mEngine->entryCache (
ltACCOUNT_ROOT, Ledger::getAccountRootIndex (uDstAccountID)));
if (!sleDst)
{
m_journal.trace <<
"Delay transaction: Destination account does not exist.";
return tecNO_DST;
}
std::uint32_t const uOwnerCount (mTxnAccount->getFieldU32 (sfOwnerCount));
// The reserve required to create the line.
std::uint64_t const uReserveCreate =
(uOwnerCount < 2)
? 0
: mEngine->getLedger ()->getReserve (uOwnerCount + 1);
STAmount saLimitAllow = saLimitAmount;
saLimitAllow.setIssuer (mTxnAccountID);
SLE::pointer sleRippleState (mEngine->entryCache (ltRIPPLE_STATE,
Ledger::getRippleStateIndex (mTxnAccountID, uDstAccountID, currency)));
if (sleRippleState)
{
STAmount saLowBalance;
STAmount saLowLimit;
STAmount saHighBalance;
STAmount saHighLimit;
std::uint32_t uLowQualityIn;
std::uint32_t uLowQualityOut;
std::uint32_t uHighQualityIn;
std::uint32_t uHighQualityOut;
auto const& uLowAccountID = !bHigh ? mTxnAccountID : uDstAccountID;
auto const& uHighAccountID = bHigh ? mTxnAccountID : uDstAccountID;
SLE::ref sleLowAccount = !bHigh ? mTxnAccount : sleDst;
SLE::ref sleHighAccount = bHigh ? mTxnAccount : sleDst;
//
// Balances
//
saLowBalance = sleRippleState->getFieldAmount (sfBalance);
saHighBalance = -saLowBalance;
//
// Limits
//
sleRippleState->setFieldAmount (!bHigh ? sfLowLimit : sfHighLimit, saLimitAllow);
saLowLimit = !bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfLowLimit);
saHighLimit = bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfHighLimit);
//
// Quality in
//
if (!bQualityIn)
{
// Not setting. Just get it.
uLowQualityIn = sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = sleRippleState->getFieldU32 (sfHighQualityIn);
}
else if (uQualityIn)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityIn : sfHighQualityIn, uQualityIn);
uLowQualityIn = !bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfHighQualityIn);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityIn : sfHighQualityIn);
uLowQualityIn = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityIn);
}
if (QUALITY_ONE == uLowQualityIn) uLowQualityIn = 0;
if (QUALITY_ONE == uHighQualityIn) uHighQualityIn = 0;
//
// Quality out
//
if (!bQualityOut)
{
// Not setting. Just get it.
uLowQualityOut = sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = sleRippleState->getFieldU32 (sfHighQualityOut);
}
else if (uQualityOut)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityOut : sfHighQualityOut, uQualityOut);
uLowQualityOut = !bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfHighQualityOut);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityOut : sfHighQualityOut);
uLowQualityOut = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityOut);
}
std::uint32_t const uFlagsIn (sleRippleState->getFieldU32 (sfFlags));
std::uint32_t uFlagsOut (uFlagsIn);
if (bSetNoRipple && !bClearNoRipple && (bHigh ? saHighBalance : saLowBalance) >= zero)
{
uFlagsOut |= (bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
else if (bClearNoRipple && !bSetNoRipple)
{
uFlagsOut &= ~(bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
if (bSetFreeze && !bClearFreeze && !mTxnAccount->isFlag (lsfNoFreeze))
{
uFlagsOut |= (bHigh ? lsfHighFreeze : lsfLowFreeze);
}
else if (bClearFreeze && !bSetFreeze)
{
uFlagsOut &= ~(bHigh ? lsfHighFreeze : lsfLowFreeze);
}
if (QUALITY_ONE == uLowQualityOut) uLowQualityOut = 0;
if (QUALITY_ONE == uHighQualityOut) uHighQualityOut = 0;
bool const bLowReserveSet = uLowQualityIn || uLowQualityOut ||
(uFlagsOut & lsfLowNoRipple) ||
(uFlagsOut & lsfLowFreeze) ||
saLowLimit || saLowBalance > zero;
bool const bLowReserveClear = !bLowReserveSet;
bool const bHighReserveSet = uHighQualityIn || uHighQualityOut ||
(uFlagsOut & lsfHighNoRipple) ||
(uFlagsOut & lsfHighFreeze) ||
saHighLimit || saHighBalance > zero;
bool const bHighReserveClear = !bHighReserveSet;
bool const bDefault = bLowReserveClear && bHighReserveClear;
bool const bLowReserved = (uFlagsIn & lsfLowReserve);
bool const bHighReserved = (uFlagsIn & lsfHighReserve);
bool bReserveIncrease = false;
if (bSetAuth)
{
uFlagsOut |= (bHigh ? lsfHighAuth : lsfLowAuth);
}
if (bLowReserveSet && !bLowReserved)
{
// Set reserve for low account.
mEngine->view ().ownerCountAdjust (uLowAccountID, 1, sleLowAccount);
uFlagsOut |= lsfLowReserve;
if (!bHigh)
bReserveIncrease = true;
}
if (bLowReserveClear && bLowReserved)
{
// Clear reserve for low account.
mEngine->view ().ownerCountAdjust (uLowAccountID, -1, sleLowAccount);
uFlagsOut &= ~lsfLowReserve;
}
if (bHighReserveSet && !bHighReserved)
{
// Set reserve for high account.
mEngine->view ().ownerCountAdjust (uHighAccountID, 1, sleHighAccount);
uFlagsOut |= lsfHighReserve;
if (bHigh)
bReserveIncrease = true;
}
if (bHighReserveClear && bHighReserved)
{
// Clear reserve for high account.
mEngine->view ().ownerCountAdjust (uHighAccountID, -1, sleHighAccount);
uFlagsOut &= ~lsfHighReserve;
}
if (uFlagsIn != uFlagsOut)
sleRippleState->setFieldU32 (sfFlags, uFlagsOut);
if (bDefault || badCurrency() == currency)
{
// Delete.
terResult = mEngine->view ().trustDelete (sleRippleState, uLowAccountID, uHighAccountID);
}
else if (bReserveIncrease
&& mPriorBalance.getNValue () < uReserveCreate) // Reserve is not scaled by load.
{
m_journal.trace <<
"Delay transaction: Insufficent reserve to add trust line.";
// Another transaction could provide XRP to the account and then
// this transaction would succeed.
terResult = tecINSUF_RESERVE_LINE;
}
else
{
mEngine->entryModify (sleRippleState);
m_journal.trace << "Modify ripple line";
}
}
// Line does not exist.
else if (!saLimitAmount // Setting default limit.
&& (!bQualityIn || !uQualityIn) // Not setting quality in or setting default quality in.
&& (!bQualityOut || !uQualityOut)) // Not setting quality out or setting default quality out.
{
m_journal.trace <<
"Redundant: Setting non-existent ripple line to defaults.";
return tecNO_LINE_REDUNDANT;
}
else if (mPriorBalance.getNValue () < uReserveCreate) // Reserve is not scaled by load.
{
m_journal.trace <<
"Delay transaction: Line does not exist. Insufficent reserve to create line.";
// Another transaction could create the account and then this transaction would succeed.
terResult = tecNO_LINE_INSUF_RESERVE;
}
else if (badCurrency() == currency)
{
terResult = temBAD_CURRENCY;
}
else
{
// Zero balance in currency.
STAmount saBalance ({currency, noAccount()});
uint256 index (Ledger::getRippleStateIndex (
mTxnAccountID, uDstAccountID, currency));
m_journal.trace <<
"doTrustSet: Creating ripple line: " <<
to_string (index);
// Create a new ripple line.
terResult = mEngine->view ().trustCreate (
bHigh,
mTxnAccountID,
uDstAccountID,
index,
mTxnAccount,
bSetAuth,
bSetNoRipple && !bClearNoRipple,
bSetFreeze && !bClearFreeze,
saBalance,
saLimitAllow, // Limit for who is being charged.
uQualityIn,
uQualityOut);
}
return terResult;
}
TER
SetTrust::doApply ()
{
TER terResult = tesSUCCESS;
STAmount const saLimitAmount (tx().getFieldAmount (sfLimitAmount));
bool const bQualityIn (tx().isFieldPresent (sfQualityIn));
bool const bQualityOut (tx().isFieldPresent (sfQualityOut));
Currency const currency (saLimitAmount.getCurrency ());
AccountID uDstAccountID (saLimitAmount.getIssuer ());
// true, iff current is high account.
bool const bHigh = account_ > uDstAccountID;
auto const sle = view().peek(
keylet::account(account_));
std::uint32_t const uOwnerCount = sle->getFieldU32 (sfOwnerCount);
// The reserve required to create the line. Note that we allow up to
// two trust lines without requiring a reserve because being able to
// exchange currencies is a powerful Ripple feature.
//
// This is also a security feature: if you're a gateway and you want to
// be able to let someone use your services, you would otherwise have to
// give them enough XRP to cover the incremental reserve for their trust
// line. If they had no intention of using your services, they could use
// the XRP for their own purposes. So we make it possible for gateways
// to fund accounts in a way where there's no incentive to trick them
// into creating an account you have no intention of using.
XRPAmount const reserveCreate ((uOwnerCount < 2)
? XRPAmount (zero)
: view().fees().accountReserve(uOwnerCount + 1));
std::uint32_t uQualityIn (bQualityIn ? tx().getFieldU32 (sfQualityIn) : 0);
std::uint32_t uQualityOut (bQualityOut ? tx().getFieldU32 (sfQualityOut) : 0);
if (bQualityOut && QUALITY_ONE == uQualityOut)
uQualityOut = 0;
std::uint32_t const uTxFlags = tx().getFlags ();
bool const bSetAuth = (uTxFlags & tfSetfAuth);
bool const bSetNoRipple = (uTxFlags & tfSetNoRipple);
bool const bClearNoRipple = (uTxFlags & tfClearNoRipple);
bool const bSetFreeze = (uTxFlags & tfSetFreeze);
bool const bClearFreeze = (uTxFlags & tfClearFreeze);
auto viewJ = ctx_.app.journal ("View");
if (bSetAuth && !(sle->getFieldU32 (sfFlags) & lsfRequireAuth))
{
j_.trace <<
"Retry: Auth not required.";
return tefNO_AUTH_REQUIRED;
}
if (account_ == uDstAccountID)
{
// The only purpose here is to allow a mistakenly created
// trust line to oneself to be deleted. If no such trust
// lines exist now, why not remove this code and simply
// return an error?
SLE::pointer sleDelete = view().peek (
keylet::line(account_, uDstAccountID, currency));
if (sleDelete)
{
j_.warning <<
"Clearing redundant line.";
return trustDelete (view(),
sleDelete, account_, uDstAccountID, viewJ);
}
else
{
j_.trace <<
"Malformed transaction: Can not extend credit to self.";
return temDST_IS_SRC;
}
}
SLE::pointer sleDst =
view().peek (keylet::account(uDstAccountID));
if (!sleDst)
{
j_.trace <<
"Delay transaction: Destination account does not exist.";
return tecNO_DST;
}
STAmount saLimitAllow = saLimitAmount;
saLimitAllow.setIssuer (account_);
SLE::pointer sleRippleState = view().peek (
keylet::line(account_, uDstAccountID, currency));
if (sleRippleState)
{
STAmount saLowBalance;
STAmount saLowLimit;
STAmount saHighBalance;
STAmount saHighLimit;
std::uint32_t uLowQualityIn;
std::uint32_t uLowQualityOut;
std::uint32_t uHighQualityIn;
std::uint32_t uHighQualityOut;
auto const& uLowAccountID = !bHigh ? account_ : uDstAccountID;
auto const& uHighAccountID = bHigh ? account_ : uDstAccountID;
SLE::ref sleLowAccount = !bHigh ? sle : sleDst;
SLE::ref sleHighAccount = bHigh ? sle : sleDst;
//
// Balances
//
saLowBalance = sleRippleState->getFieldAmount (sfBalance);
saHighBalance = -saLowBalance;
//
// Limits
//
sleRippleState->setFieldAmount (!bHigh ? sfLowLimit : sfHighLimit, saLimitAllow);
saLowLimit = !bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfLowLimit);
saHighLimit = bHigh ? saLimitAllow : sleRippleState->getFieldAmount (sfHighLimit);
//
// Quality in
//
if (!bQualityIn)
{
// Not setting. Just get it.
uLowQualityIn = sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = sleRippleState->getFieldU32 (sfHighQualityIn);
}
else if (uQualityIn)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityIn : sfHighQualityIn, uQualityIn);
uLowQualityIn = !bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? uQualityIn : sleRippleState->getFieldU32 (sfHighQualityIn);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityIn : sfHighQualityIn);
uLowQualityIn = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityIn);
uHighQualityIn = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityIn);
}
if (QUALITY_ONE == uLowQualityIn) uLowQualityIn = 0;
if (QUALITY_ONE == uHighQualityIn) uHighQualityIn = 0;
//
// Quality out
//
if (!bQualityOut)
{
// Not setting. Just get it.
uLowQualityOut = sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = sleRippleState->getFieldU32 (sfHighQualityOut);
}
else if (uQualityOut)
{
// Setting.
sleRippleState->setFieldU32 (!bHigh ? sfLowQualityOut : sfHighQualityOut, uQualityOut);
uLowQualityOut = !bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? uQualityOut : sleRippleState->getFieldU32 (sfHighQualityOut);
}
else
{
// Clearing.
sleRippleState->makeFieldAbsent (!bHigh ? sfLowQualityOut : sfHighQualityOut);
uLowQualityOut = !bHigh ? 0 : sleRippleState->getFieldU32 (sfLowQualityOut);
uHighQualityOut = bHigh ? 0 : sleRippleState->getFieldU32 (sfHighQualityOut);
}
std::uint32_t const uFlagsIn (sleRippleState->getFieldU32 (sfFlags));
std::uint32_t uFlagsOut (uFlagsIn);
if (bSetNoRipple && !bClearNoRipple && (bHigh ? saHighBalance : saLowBalance) >= zero)
{
uFlagsOut |= (bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
else if (bClearNoRipple && !bSetNoRipple)
{
uFlagsOut &= ~(bHigh ? lsfHighNoRipple : lsfLowNoRipple);
}
if (bSetFreeze && !bClearFreeze && !sle->isFlag (lsfNoFreeze))
{
uFlagsOut |= (bHigh ? lsfHighFreeze : lsfLowFreeze);
}
else if (bClearFreeze && !bSetFreeze)
{
uFlagsOut &= ~(bHigh ? lsfHighFreeze : lsfLowFreeze);
}
if (QUALITY_ONE == uLowQualityOut) uLowQualityOut = 0;
if (QUALITY_ONE == uHighQualityOut) uHighQualityOut = 0;
bool const bLowDefRipple = sleLowAccount->getFlags() & lsfDefaultRipple;
bool const bHighDefRipple = sleHighAccount->getFlags() & lsfDefaultRipple;
bool const bLowReserveSet = uLowQualityIn || uLowQualityOut ||
((uFlagsOut & lsfLowNoRipple) == 0) != bLowDefRipple ||
(uFlagsOut & lsfLowFreeze) ||
saLowLimit || saLowBalance > zero;
bool const bLowReserveClear = !bLowReserveSet;
bool const bHighReserveSet = uHighQualityIn || uHighQualityOut ||
((uFlagsOut & lsfHighNoRipple) == 0) != bHighDefRipple ||
(uFlagsOut & lsfHighFreeze) ||
saHighLimit || saHighBalance > zero;
bool const bHighReserveClear = !bHighReserveSet;
bool const bDefault = bLowReserveClear && bHighReserveClear;
bool const bLowReserved = (uFlagsIn & lsfLowReserve);
bool const bHighReserved = (uFlagsIn & lsfHighReserve);
bool bReserveIncrease = false;
if (bSetAuth)
{
uFlagsOut |= (bHigh ? lsfHighAuth : lsfLowAuth);
}
if (bLowReserveSet && !bLowReserved)
{
// Set reserve for low account.
adjustOwnerCount(view(),
sleLowAccount, 1, viewJ);
uFlagsOut |= lsfLowReserve;
if (!bHigh)
bReserveIncrease = true;
}
if (bLowReserveClear && bLowReserved)
{
// Clear reserve for low account.
adjustOwnerCount(view(),
sleLowAccount, -1, viewJ);
uFlagsOut &= ~lsfLowReserve;
}
if (bHighReserveSet && !bHighReserved)
{
// Set reserve for high account.
adjustOwnerCount(view(),
sleHighAccount, 1, viewJ);
uFlagsOut |= lsfHighReserve;
if (bHigh)
bReserveIncrease = true;
}
if (bHighReserveClear && bHighReserved)
{
// Clear reserve for high account.
adjustOwnerCount(view(),
sleHighAccount, -1, viewJ);
uFlagsOut &= ~lsfHighReserve;
}
if (uFlagsIn != uFlagsOut)
sleRippleState->setFieldU32 (sfFlags, uFlagsOut);
if (bDefault || badCurrency() == currency)
{
// Delete.
terResult = trustDelete (view(),
sleRippleState, uLowAccountID, uHighAccountID, viewJ);
}
// Reserve is not scaled by load.
else if (bReserveIncrease && mPriorBalance < reserveCreate)
{
j_.trace <<
"Delay transaction: Insufficent reserve to add trust line.";
// Another transaction could provide XRP to the account and then
// this transaction would succeed.
terResult = tecINSUF_RESERVE_LINE;
}
else
{
view().update (sleRippleState);
j_.trace << "Modify ripple line";
}
}
// Line does not exist.
else if (! saLimitAmount && // Setting default limit.
(! bQualityIn || ! uQualityIn) && // Not setting quality in or setting default quality in.
(! bQualityOut || ! uQualityOut) && // Not setting quality out or setting default quality out.
(! ((view().flags() & tapENABLE_TESTING) ||
view().rules().enabled(featureTrustSetAuth,
ctx_.config.features)) || ! bSetAuth))
{
j_.trace <<
"Redundant: Setting non-existent ripple line to defaults.";
return tecNO_LINE_REDUNDANT;
}
else if (mPriorBalance < reserveCreate) // Reserve is not scaled by load.
{
j_.trace <<
"Delay transaction: Line does not exist. Insufficent reserve to create line.";
// Another transaction could create the account and then this transaction would succeed.
terResult = tecNO_LINE_INSUF_RESERVE;
}
else
{
// Zero balance in currency.
STAmount saBalance ({currency, noAccount()});
uint256 index (getRippleStateIndex (
account_, uDstAccountID, currency));
j_.trace <<
"doTrustSet: Creating ripple line: " <<
to_string (index);
// Create a new ripple line.
terResult = trustCreate (view(),
bHigh,
account_,
uDstAccountID,
index,
sle,
bSetAuth,
bSetNoRipple && !bClearNoRipple,
bSetFreeze && !bClearFreeze,
saBalance,
saLimitAllow, // Limit for who is being charged.
uQualityIn,
uQualityOut, viewJ);
}
return terResult;
}
TER PaymentTransactor::doApply ()
{
// Ripple if source or destination is non-native or if there are paths.
std::uint32_t const uTxFlags = mTxn.getFlags ();
//bool const bPartialPayment = is_bit_set(uTxFlags, tfPartialPayment);
bool const bLimitQuality = is_bit_set (uTxFlags, tfLimitQuality);
bool const bNoRippleDirect = is_bit_set (uTxFlags, tfNoRippleDirect);
bool const bPaths = mTxn.isFieldPresent (sfPaths);
bool const bMax = mTxn.isFieldPresent (sfSendMax);
uint160 const uDstAccountID = mTxn.getFieldAccount160 (sfDestination);
STAmount const saDstAmount = mTxn.getFieldAmount (sfAmount);
STAmount const saMaxAmount = bMax
? mTxn.getFieldAmount (sfSendMax)
: saDstAmount.isNative ()
? saDstAmount
: STAmount (saDstAmount.getCurrency (),
mTxnAccountID,
saDstAmount.getMantissa (),
saDstAmount.getExponent (),
saDstAmount < zero);
uint160 const uSrcCurrency = saMaxAmount.getCurrency ();
uint160 const uDstCurrency = saDstAmount.getCurrency ();
bool const bSTRDirect = uSrcCurrency.isZero () && uDstCurrency.isZero ();
m_journal.trace <<
"saMaxAmount=" << saMaxAmount.getFullText () <<
" saDstAmount=" << saDstAmount.getFullText ();
if (!saDstAmount.isLegalNet () || !saMaxAmount.isLegalNet ())
return temBAD_AMOUNT;
if (uTxFlags & tfPaymentMask)
{
m_journal.trace <<
"Malformed transaction: Invalid flags set.";
return temINVALID_FLAG;
}
else if (!uDstAccountID)
{
m_journal.trace <<
"Malformed transaction: Payment destination account not specified.";
return temDST_NEEDED;
}
else if (bMax && saMaxAmount <= zero)
{
m_journal.trace <<
"Malformed transaction: bad max amount: " << saMaxAmount.getFullText ();
return temBAD_AMOUNT;
}
else if (saDstAmount <= zero)
{
m_journal.trace <<
"Malformed transaction: bad dst amount: " << saDstAmount.getFullText ();
return temBAD_AMOUNT;
}
else if (CURRENCY_BAD == uSrcCurrency || CURRENCY_BAD == uDstCurrency)
{
m_journal.trace <<
"Malformed transaction: Bad currency.";
return temBAD_CURRENCY;
}
else if (mTxnAccountID == uDstAccountID && uSrcCurrency == uDstCurrency && !bPaths)
{
m_journal.trace <<
"Malformed transaction: Redundant transaction:" <<
" src=" << to_string (mTxnAccountID) <<
" dst=" << to_string (uDstAccountID) <<
" src_cur=" << to_string (uSrcCurrency) <<
" dst_cur=" << to_string (uDstCurrency);
return temREDUNDANT;
}
else if (bMax && saMaxAmount == saDstAmount && saMaxAmount.getCurrency () == saDstAmount.getCurrency ())
{
m_journal.trace <<
"Malformed transaction: Redundant SendMax.";
return temREDUNDANT_SEND_MAX;
}
else if (bSTRDirect && bMax)
{
m_journal.trace <<
"Malformed transaction: SendMax specified for STR to STR.";
return temBAD_SEND_STR_MAX;
}
else if (bSTRDirect && bPaths)
{
m_journal.trace <<
"Malformed transaction: Paths specified for STR to STR.";
return temBAD_SEND_STR_PATHS;
}
else if (bSTRDirect && bLimitQuality)
{
m_journal.trace <<
"Malformed transaction: Limit quality specified for STR to STR.";
return temBAD_SEND_STR_LIMIT;
}
else if (bSTRDirect && bNoRippleDirect)
{
m_journal.trace <<
"Malformed transaction: No ripple direct specified for STR to STR.";
return temBAD_SEND_STR_NO_DIRECT;
}
SLE::pointer sleDst (mEngine->entryCache (
ltACCOUNT_ROOT, Ledger::getAccountRootIndex (uDstAccountID)));
if (!sleDst)
{
// Destination account does not exist.
if (!saDstAmount.isNative ())
{
m_journal.trace <<
"Delay transaction: Destination account does not exist.";
// Another transaction could create the account and then this transaction would succeed.
return tecNO_DST;
}
// Note: Reserve is not scaled by load.
else if (saDstAmount.getNValue () < mEngine->getLedger ()->getReserve (0))
{
m_journal.trace <<
"Delay transaction: Destination account does not exist. " <<
"Insufficient payment to create account.";
// Another transaction could create the account and then this
// transaction would succeed.
return tecNO_DST_INSUF_STR;
}
// Create the account.
sleDst = mEngine->entryCreate (
ltACCOUNT_ROOT, Ledger::getAccountRootIndex (uDstAccountID));
sleDst->setFieldAccount (sfAccount, uDstAccountID);
sleDst->setFieldU32 (sfSequence, 1);
}
else if ((sleDst->getFlags () & lsfRequireDestTag) && !mTxn.isFieldPresent (sfDestinationTag))
{
m_journal.trace <<
"Malformed transaction: DestinationTag required.";
return tefDST_TAG_NEEDED;
}
else
{
mEngine->entryModify (sleDst);
}
TER terResult;
// XXX Should bMax be sufficient to imply ripple?
bool const bRipple = bPaths || bMax || !saDstAmount.isNative ();
if (bRipple)
{
// Ripple payment
STPathSet spsPaths = mTxn.getFieldPathSet (sfPaths);
std::vector<PathState::pointer> vpsExpanded;
STAmount saMaxAmountAct;
STAmount saDstAmountAct;
try
{
bool const openLedger = is_bit_set (mParams, tapOPEN_LEDGER);
bool tooManyPaths = false;
if (spsPaths.size() > MAX_NUM_PATHS) tooManyPaths = true;
else
{
for (auto const& path : spsPaths)
{
if (path.size() > MAX_PATH_SIZE)
{
tooManyPaths = true;
break;
}
}
}
terResult = openLedger && tooManyPaths
? telBAD_PATH_COUNT // Too many paths for proposed ledger.
: RippleCalc::rippleCalc(
mEngine->view(),
saMaxAmountAct,
saDstAmountAct,
vpsExpanded,
saMaxAmount,
saDstAmount,
uDstAccountID,
mTxnAccountID,
spsPaths,
false,
bLimitQuality,
bNoRippleDirect, // Always compute for finalizing ledger.
false, // Not standalone, delete unfundeds.
is_bit_set(mParams, tapOPEN_LEDGER));
if (isTerRetry(terResult))
terResult = tecPATH_DRY;
if ((tesSUCCESS == terResult) && (saDstAmountAct != saDstAmount))
mEngine->view().setDeliveredAmount(saDstAmountAct);
}
catch (std::exception const& e)
{
m_journal.trace <<
"Caught throw: " << e.what ();
terResult = tefEXCEPTION;
}
}
else
{
// Direct STR payment.
std::uint32_t const uOwnerCount (mTxnAccount->getFieldU32 (sfOwnerCount));
std::uint64_t const uReserve (mEngine->getLedger ()->getReserve (uOwnerCount));
// Make sure have enough reserve to send. Allow final spend to use reserve for fee.
if (mPriorBalance < saDstAmount + std::max(uReserve, mTxn.getTransactionFee ().getNValue ()))
{
// Vote no. However, transaction might succeed, if applied in a different order.
m_journal.trace << "Delay transaction: Insufficient funds: " <<
" " << mPriorBalance.getText () <<
" / " << (saDstAmount + uReserve).getText () <<
" (" << uReserve << ")";
terResult = tecUNFUNDED_PAYMENT;
}
else
{
mTxnAccount->setFieldAmount (sfBalance, mSourceBalance - saDstAmount);
sleDst->setFieldAmount (sfBalance, sleDst->getFieldAmount (sfBalance) + saDstAmount);
terResult = tesSUCCESS;
}
}
std::string strToken;
std::string strHuman;
if (transResultInfo (terResult, strToken, strHuman))
{
m_journal.trace <<
strToken << ": " << strHuman;
}
else
{
assert (false);
}
return terResult;
}
// {
// account: <account>|<account_public_key>
// account_index: <number> // optional, defaults to 0.
// ledger_hash : <ledger>
// ledger_index : <ledger_index>
// limit: integer // optional
// marker: opaque // optional, resume previous query
// }
Json::Value doAccountOffers (RPC::Context& context)
{
auto const& params (context.params_);
Ledger::pointer ledger;
Json::Value result (RPC::lookupLedger (params, ledger, context.netOps_));
if (! ledger)
return result;
if (! params.isMember (jss::account))
return RPC::missing_field_error ("account");
std::string strIdent (params[jss::account].asString ());
bool bIndex (params.isMember (jss::account_index));
int const iIndex (bIndex ? params[jss::account_index].asUInt () : 0);
RippleAddress rippleAddress;
result = RPC::accountFromString (ledger, rippleAddress, bIndex, strIdent,
iIndex, false, context.netOps_);
if (! result.empty ())
return result;
// Get info on account.
result[jss::account] = rippleAddress.humanAccountID ();
if (bIndex)
result[jss::account_index] = iIndex;
if (! ledger->hasAccount (rippleAddress))
return rpcError (rpcACT_NOT_FOUND);
unsigned int limit;
if (params.isMember (jss::limit))
{
limit = std::max (RPC::Tuning::minOffersPerRequest,
std::min (params[jss::limit].asUInt (),
RPC::Tuning::maxOffersPerRequest));
}
else
{
limit = RPC::Tuning::defaultOffersPerRequest;
}
Account const& raAccount (rippleAddress.getAccountID ());
Json::Value& jsonOffers (result[jss::offers] = Json::arrayValue);
std::vector <SLE::pointer> offers;
unsigned int reserve (limit);
uint256 startAfter;
std::uint64_t startHint;
if (params.isMember(jss::marker))
{
// We have a start point. Use limit - 1 from the result and use the
// very last one for the resume.
Json::Value const& marker (params[jss::marker]);
if (! marker.isString ())
return rpcError (rpcACT_MALFORMED);
startAfter.SetHex (marker.asString ());
SLE::pointer sleOffer (ledger->getSLEi (startAfter));
if (sleOffer == nullptr ||
sleOffer->getType () != ltOFFER ||
raAccount != sleOffer->getFieldAccount160 (sfAccount))
{
return rpcError (rpcINVALID_PARAMS);
}
startHint = sleOffer->getFieldU64(sfOwnerNode);
// Caller provided the first offer (startAfter), add it as first result
Json::Value& obj (jsonOffers.append (Json::objectValue));
sleOffer->getFieldAmount (sfTakerPays).setJson (obj[jss::taker_pays]);
sleOffer->getFieldAmount (sfTakerGets).setJson (obj[jss::taker_gets]);
obj[jss::seq] = sleOffer->getFieldU32 (sfSequence);
obj[jss::flags] = sleOffer->getFieldU32 (sfFlags);
offers.reserve (reserve);
}
else
{
startHint = 0;
// We have no start point, limit should be one higher than requested.
offers.reserve (++reserve);
}
if (! ledger->visitAccountItems (raAccount, startAfter, startHint, reserve,
[&offers](SLE::ref offer)
{
if (offer->getType () == ltOFFER)
{
offers.emplace_back (offer);
return true;
}
return false;
}))
{
return rpcError (rpcINVALID_PARAMS);
}
if (offers.size () == reserve)
{
result[jss::limit] = limit;
result[jss::marker] = to_string (offers.back ()->getIndex ());
offers.pop_back ();
}
for (auto const& offer : offers)
{
Json::Value& obj (jsonOffers.append (Json::objectValue));
offer->getFieldAmount (sfTakerPays).setJson (obj[jss::taker_pays]);
offer->getFieldAmount (sfTakerGets).setJson (obj[jss::taker_gets]);
obj[jss::seq] = offer->getFieldU32 (sfSequence);
obj[jss::flags] = offer->getFieldU32 (sfFlags);
}
context.loadType_ = Resource::feeMediumBurdenRPC;
return result;
}
