C++ STAmount::getFullText方法代码示例

TER
SetTrust::preflight (PreflightContext const& ctx)
{
    auto const ret = preflight1 (ctx);
    if (!isTesSuccess (ret))
        return ret;

    auto& tx = ctx.tx;
    auto& j = ctx.j;

    std::uint32_t const uTxFlags = tx.getFlags ();

    if (uTxFlags & tfTrustSetMask)
    {
        JLOG(j.trace) <<
            "Malformed transaction: Invalid flags set.";
        return temINVALID_FLAG;
    }

    STAmount const saLimitAmount (tx.getFieldAmount (sfLimitAmount));

    if (!isLegalNet (saLimitAmount))
        return temBAD_AMOUNT;

    if (saLimitAmount.native ())
    {
        JLOG(j.trace) <<
            "Malformed transaction: specifies native limit " <<
            saLimitAmount.getFullText ();
        return temBAD_LIMIT;
    }

    if (badCurrency() == saLimitAmount.getCurrency ())
    {
        JLOG(j.trace) <<
            "Malformed transaction: specifies XRP as IOU";
        return temBAD_CURRENCY;
    }

    if (saLimitAmount < zero)
    {
        JLOG(j.trace) <<
            "Malformed transaction: Negative credit limit.";
        return temBAD_LIMIT;
    }

    // Check if destination makes sense.
    auto const& issuer = saLimitAmount.getIssuer ();

    if (!issuer || issuer == noAccount())
    {
        JLOG(j.trace) <<
            "Malformed transaction: no destination account.";
        return temDST_NEEDED;
    }

    return preflight2 (ctx);
}

    TER preCheck () override
    {
        std::uint32_t const uTxFlags = mTxn.getFlags ();

        if (uTxFlags & tfPaymentMask)
        {
            m_journal.trace << "Malformed transaction: " <<
                "Invalid flags set.";
            return temINVALID_FLAG;
        }

        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);

        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);

        auto const& uSrcCurrency = maxSourceAmount.getCurrency ();
        auto const& uDstCurrency = saDstAmount.getCurrency ();

        // isZero() is XDV.  FIX!
        bool const bXDVDirect = uSrcCurrency.isZero () && uDstCurrency.isZero ();

        if (!isLegalNet (saDstAmount) || !isLegalNet (maxSourceAmount))
            return temBAD_AMOUNT;

        AccountID const uDstAccountID (mTxn.getFieldAccount160 (sfDestination));

        if (!uDstAccountID)
        {
            m_journal.trace << "Malformed transaction: " <<
                "Payment destination account not specified.";
            return temDST_NEEDED;
        }
        if (bMax && maxSourceAmount <= zero)
        {
            m_journal.trace << "Malformed transaction: " <<
                "bad max amount: " << maxSourceAmount.getFullText ();
            return temBAD_AMOUNT;
        }
        if (saDstAmount <= zero)
        {
            m_journal.trace << "Malformed transaction: "<<
                "bad dst amount: " << saDstAmount.getFullText ();
            return temBAD_AMOUNT;
        }
        if (badCurrency() == uSrcCurrency || badCurrency() == uDstCurrency)
        {
            m_journal.trace <<"Malformed transaction: " <<
                "Bad currency.";
            return temBAD_CURRENCY;
        }
        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 payment from " << to_string (mTxnAccountID) <<
                " to self without path for " << to_string (uDstCurrency);
            return temREDUNDANT;
        }
        if (bXDVDirect && bMax)
        {
            // Consistent but redundant transaction.
            m_journal.trace << "Malformed transaction: " <<
                "SendMax specified for XDV to XDV.";
            return temBAD_SEND_XDV_MAX;
        }
        if (bXDVDirect && bPaths)
        {
            // XDV is sent without paths.
            m_journal.trace << "Malformed transaction: " <<
                "Paths specified for XDV to XDV.";
            return temBAD_SEND_XDV_PATHS;
        }
        if (bXDVDirect && partialPaymentAllowed)
        {
            // Consistent but redundant transaction.
            m_journal.trace << "Malformed transaction: " <<
                "Partial payment specified for XDV to XDV.";
            return temBAD_SEND_XDV_PARTIAL;
        }
        if (bXDVDirect && limitQuality)
        {
            // Consistent but redundant transaction.
            m_journal.trace << "Malformed transaction: " <<
//.........这里部分代码省略.........

    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?

//.........这里部分代码省略.........

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);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    {
        // We reverse gets and pays because during offer crossing we are taking.
        core::Amounts const taker_amount (saTakerGets, saTakerPays);

        // The amount of the offer that we will need to place, after we finish
        // offer crossing processing. It may be equal to the original amount,
        // empty (fully crossed), or something in-between.
        core::Amounts place_offer;

        std::tie(terResult, place_offer) = crossOffers (view, taker_amount);

        if (terResult == tecFAILED_PROCESSING && bOpenLedger)
            terResult = telFAILED_PROCESSING;

        if (terResult == tesSUCCESS)
        {
            // We now need to reduce the offer by the cross flow. We reverse
            // in and out here, since during crossing we were takers.
            assert (saTakerPays.getCurrency () == place_offer.out.getCurrency ());
            assert (saTakerPays.getIssuer () == place_offer.out.getIssuer ());
            assert (saTakerGets.getCurrency () == place_offer.in.getCurrency ());
            assert (saTakerGets.getIssuer () == place_offer.in.getIssuer ());

            if (taker_amount != place_offer)
                crossed = true;

            if (m_journal.debug)
            {
                m_journal.debug << "Offer Crossing: " << transToken (terResult);

                if (terResult == tesSUCCESS)
                {
                    m_journal.debug <<
                        "    takerPays: " << saTakerPays.getFullText () <<
                        " -> " << place_offer.out.getFullText ();
                    m_journal.debug <<
                        "    takerGets: " << saTakerGets.getFullText () <<
                        " -> " << place_offer.in.getFullText ();
                }
            }

            saTakerPays = place_offer.out;
            saTakerGets = place_offer.in;
        }
    }

    if (terResult != tesSUCCESS)
    {
        m_journal.debug <<
            "final terResult=" << transToken (terResult);

        return terResult;
    }

    if (m_journal.debug)
    {
        m_journal.debug <<
            "takeOffers: saTakerPays=" <<saTakerPays.getFullText ();
        m_journal.debug <<
            "takeOffers: saTakerGets=" << saTakerGets.getFullText ();
        m_journal.debug <<
            "takeOffers: mTxnAccountID=" <<
            to_string (mTxnAccountID);
        m_journal.debug <<
            "takeOffers:         FUNDS=" << view.accountFunds (
            mTxnAccountID, saTakerGets, fhZERO_IF_FROZEN).getFullText ();

Json::Value PathRequest::doUpdate (RippleLineCache::ref cache, bool fast)
{
    m_journal.debug << iIdentifier << " update " << (fast ? "fast" : "normal");

    ScopedLockType sl (mLock);

    if (!isValid (cache))
        return jvStatus;
    jvStatus = Json::objectValue;

    auto sourceCurrencies = sciSourceCurrencies;

    if (sourceCurrencies.empty ())
    {
        auto usCurrencies =
                usAccountSourceCurrencies (raSrcAccount, cache, true);
        bool sameAccount = raSrcAccount == raDstAccount;
        for (auto const& c: usCurrencies)
        {
            if (!sameAccount || (c != saDstAmount.getCurrency ()))
            {
                if (c.isZero ())
                    sourceCurrencies.insert (std::make_pair (c, xrpAccount()));
                else
                    sourceCurrencies.insert (std::make_pair (c, raSrcAccount.getAccountID ()));
            }
        }
    }

    jvStatus["source_account"] = raSrcAccount.humanAccountID ();
    jvStatus["destination_account"] = raDstAccount.humanAccountID ();
    jvStatus["destination_amount"] = saDstAmount.getJson (0);

    if (!jvId.isNull ())
        jvStatus["id"] = jvId;

    Json::Value jvArray = Json::arrayValue;

    int iLevel = iLastLevel;
    bool loaded = getApp().getFeeTrack().isLoadedLocal();

    if (iLevel == 0)
    { // first pass
        if (loaded || fast)
            iLevel = getConfig().PATH_SEARCH_FAST;
        else
            iLevel = getConfig().PATH_SEARCH;
    }
    else if ((iLevel == getConfig().PATH_SEARCH_FAST) && !fast)
    { // leaving fast pathfinding
        iLevel = getConfig().PATH_SEARCH;
        if (loaded && (iLevel > getConfig().PATH_SEARCH_FAST))
            --iLevel;
    }
    else if (bLastSuccess)
    { // decrement, if possible
        if (iLevel > getConfig().PATH_SEARCH ||
            (loaded && (iLevel > getConfig().PATH_SEARCH_FAST)))
            --iLevel;
    }
    else
    { // adjust as needed
        if (!loaded && (iLevel < getConfig().PATH_SEARCH_MAX))
            ++iLevel;
        if (loaded && (iLevel > getConfig().PATH_SEARCH_FAST))
            --iLevel;
    }

    m_journal.debug << iIdentifier << " processing at level " << iLevel;

    bool found = false;

    for (auto const& currIssuer: sourceCurrencies)
    {
        {
            STAmount test ({currIssuer.first, currIssuer.second}, 1);
            if (m_journal.debug)
            {
                m_journal.debug
                        << iIdentifier
                        << " Trying to find paths: " << test.getFullText ();
            }
        }
        bool valid;
        STPathSet& spsPaths = mContext[currIssuer];
        Pathfinder pf (cache, raSrcAccount, raDstAccount,
                       currIssuer.first, currIssuer.second, saDstAmount, valid);
        CondLog (!valid, lsDEBUG, PathRequest)
                << iIdentifier << " PF request not valid";

        STPath extraPath;
        if (valid && pf.findPaths (iLevel, 4, spsPaths, extraPath))
        {
            LedgerEntrySet lesSandbox (cache->getLedger (), tapNONE);
            PathState::List pathStateList;
            STAmount saMaxAmountAct;
            STAmount saDstAmountAct;
            auto& account = currIssuer.second.isNonZero ()
                    ? Account(currIssuer.second)
                    : isXRP (currIssuer.first)
//.........这里部分代码省略.........

//.........这里部分代码省略.........
            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

// Make sure an offer is still valid. If not, mark it unfunded.
bool OfferCreateTransactor::bValidOffer (
    SLE::ref            sleOfferDir,
    uint256 const&      uOfferIndex,
    const uint160&      uOfferOwnerID,
    const STAmount&     saOfferPays,
    const STAmount&     saOfferGets,
    const uint160&      uTakerAccountID,
    boost::unordered_set<uint256>&  usOfferUnfundedFound,
    boost::unordered_set<uint256>&  usOfferUnfundedBecame,
    boost::unordered_set<uint160>&  usAccountTouched,
    STAmount&           saOfferFunds)                       // <--
{
    bool    bValid;

    if (sleOfferDir->isFieldPresent (sfExpiration) && sleOfferDir->getFieldU32 (sfExpiration) <= mEngine->getLedger ()->getParentCloseTimeNC ())
    {
        // Offer is expired. Expired offers are considered unfunded. Delete it.
        WriteLog (lsINFO, OfferCreateTransactor) << "bValidOffer: encountered expired offer";

        usOfferUnfundedFound.insert (uOfferIndex);

        bValid  = false;
    }
    else if (uOfferOwnerID == uTakerAccountID)
    {
        // Would take own offer. Consider old offer expired. Delete it.
        WriteLog (lsINFO, OfferCreateTransactor) << "bValidOffer: encountered taker's own old offer";

        usOfferUnfundedFound.insert (uOfferIndex);

        bValid  = false;
    }
    else if (!saOfferGets.isPositive () || !saOfferPays.isPositive ())
    {
        // Offer has bad amounts. Consider offer expired. Delete it.
        WriteLog (lsWARNING, OfferCreateTransactor) << boost::str (boost::format ("bValidOffer: BAD OFFER: saOfferPays=%s saOfferGets=%s")
                % saOfferPays % saOfferGets);

        usOfferUnfundedFound.insert (uOfferIndex);
    }
    else
    {
        WriteLog (lsTRACE, OfferCreateTransactor) << "bValidOffer: saOfferPays=" << saOfferPays.getFullText ();

        saOfferFunds    = mEngine->getNodes ().accountFunds (uOfferOwnerID, saOfferPays);

        if (!saOfferFunds.isPositive ())
        {
            // Offer is unfunded, possibly due to previous balance action.
            WriteLog (lsDEBUG, OfferCreateTransactor) << "bValidOffer: offer unfunded: delete";

            boost::unordered_set<uint160>::iterator account = usAccountTouched.find (uOfferOwnerID);

            if (account != usAccountTouched.end ())
            {
                // Previously touched account.
                usOfferUnfundedBecame.insert (uOfferIndex); // Delete unfunded offer on success.
            }
            else
            {
                // Never touched source account.
                usOfferUnfundedFound.insert (uOfferIndex);  // Delete found unfunded offer when possible.
            }

            bValid  = false;
        }
        else
        {
            bValid  = true;
        }
    }

    return bValid;
}

//.........这里部分代码省略.........

            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

    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)
//.........这里部分代码省略.........

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)
    {
//.........这里部分代码省略.........

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)
//.........这里部分代码省略.........

//.........这里部分代码省略.........
        // decrement, if possible
        if (iLevel > getConfig().PATH_SEARCH ||
            (loaded && (iLevel > getConfig().PATH_SEARCH_FAST)))
            --iLevel;
    }
    else
    {
        // adjust as needed
        if (!loaded && (iLevel < getConfig().PATH_SEARCH_MAX))
            ++iLevel;
        if (loaded && (iLevel > getConfig().PATH_SEARCH_FAST))
            --iLevel;
    }

    m_journal.debug << iIdentifier << " processing at level " << iLevel;

    bool found = false;

    FindPaths fp (
        cache,
        *raSrcAccount,
        *raDstAccount,
        saDstAmount,
        iLevel,
        4);  // iMaxPaths
    for (auto const& currIssuer: sourceCurrencies)
    {
        {
            STAmount test (currIssuer, 1);
            if (m_journal.debug)
            {
                m_journal.debug
                        << iIdentifier
                        << " Trying to find paths: " << test.getFullText ();
            }
        }
        STPathSet& spsPaths = mContext[currIssuer];
        STPath fullLiquidityPath;
        auto valid = fp.findPathsForIssue (
            currIssuer,
            spsPaths,
            fullLiquidityPath);
        CondLog (!valid, lsDEBUG, PathRequest)
                << iIdentifier << " PF request not valid";

        if (valid)
        {
            boost::optional<PaymentSandbox> sandbox;
            sandbox.emplace(&*cache->getLedger(), tapNONE);

            auto& sourceAccount = !isXRP (currIssuer.account)
                    ? currIssuer.account
                    : isXRP (currIssuer.currency)
                        ? xrpAccount()
                        : *raSrcAccount;
            STAmount saMaxAmount ({currIssuer.currency, sourceAccount}, 1);

            saMaxAmount.negate ();
            m_journal.debug << iIdentifier
                            << " Paths found, calling rippleCalc";
            auto rc = path::RippleCalc::rippleCalculate (
                *sandbox,
                saMaxAmount,
                saDstAmount,
                *raDstAccount,
                *raSrcAccount,