C++ STAmount::setIssuer方法代码示例

STAmount creditLimit (
    LedgerEntrySet& ledger,
    AccountID const& account,
    AccountID const& issuer,
    Currency const& currency)
{
    STAmount result ({currency, account});

    auto sleDivvyState = ledger.entryCache (ltRIPPLE_STATE,
        getDivvyStateIndex (account, issuer, currency));

    if (sleDivvyState)
    {
        result = sleDivvyState->getFieldAmount (
            account < issuer ? sfLowLimit : sfHighLimit);
        result.setIssuer (account);
    }

    assert (result.getIssuer () == account);
    assert (result.getCurrency () == currency);
    return result;
}

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.........
        {
            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);

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));

//.........这里部分代码省略.........

static Json::Value signPayment(
    Json::Value const& params,
    Json::Value& tx_json,
    RippleAddress const& raSrcAddressID,
    RPCDetail::LedgerFacade& ledgerFacade,
    Role role)
{
    RippleAddress dstAccountID;

    if (!tx_json.isMember ("Amount"))
        return RPC::missing_field_error ("tx_json.Amount");

    STAmount amount;

    if (! amountFromJsonNoThrow (amount, tx_json ["Amount"]))
        return RPC::invalid_field_error ("tx_json.Amount");

    if (!tx_json.isMember ("Destination"))
        return RPC::missing_field_error ("tx_json.Destination");

    if (!dstAccountID.setAccountID (tx_json["Destination"].asString ()))
        return RPC::invalid_field_error ("tx_json.Destination");

    if (tx_json.isMember ("Paths") && params.isMember ("build_path"))
        return RPC::make_error (rpcINVALID_PARAMS,
            "Cannot specify both 'tx_json.Paths' and 'build_path'");

    if (!tx_json.isMember ("Paths")
        && tx_json.isMember ("Amount")
        && params.isMember ("build_path"))
    {
        // Need a ripple path.
        Currency uSrcCurrencyID;
        Account uSrcIssuerID;

        STAmount    saSendMax;

        if (tx_json.isMember ("SendMax"))
        {
            if (! amountFromJsonNoThrow (saSendMax, tx_json ["SendMax"]))
                return RPC::invalid_field_error ("tx_json.SendMax");
        }
        else
        {
            // If no SendMax, default to Amount with sender as issuer.
            saSendMax = amount;
            saSendMax.setIssuer (raSrcAddressID.getAccountID ());
        }

        if (saSendMax.isNative () && amount.isNative ())
            return RPC::make_error (rpcINVALID_PARAMS,
                "Cannot build XRP to XRP paths.");

        {
            LegacyPathFind lpf (role == Role::ADMIN);
            if (!lpf.isOk ())
                return rpcError (rpcTOO_BUSY);

            STPathSet spsPaths;
            STPath fullLiquidityPath;
            bool valid = ledgerFacade.findPathsForOneIssuer (
                dstAccountID,
                saSendMax.issue (),
                amount,
                getConfig ().PATH_SEARCH_OLD,
                4,  // iMaxPaths
                spsPaths,
                fullLiquidityPath);


            if (!valid)
            {
                WriteLog (lsDEBUG, RPCHandler)
                        << "transactionSign: build_path: No paths found.";
                return rpcError (rpcNO_PATH);
            }
            WriteLog (lsDEBUG, RPCHandler)
                    << "transactionSign: build_path: "
                    << spsPaths.getJson (0);

            if (!spsPaths.empty ())
                tx_json["Paths"] = spsPaths.getJson (0);
        }
    }
    return Json::Value();
}

static Json::Value signPayment(
    Json::Value const& params,
    Json::Value& tx_json,
    RippleAddress const& raSrcAddressID,
    Ledger::pointer lSnapshot,
    int role)
{
    RippleAddress dstAccountID;

    if (!tx_json.isMember ("Amount"))
        return RPC::missing_field_error ("tx_json.Amount");

    STAmount amount;

    if (!amount.bSetJson (tx_json ["Amount"]))
        return RPC::invalid_field_error ("tx_json.Amount");

    if (!tx_json.isMember ("Destination"))
        return RPC::missing_field_error ("tx_json.Destination");

    if (!dstAccountID.setAccountID (tx_json["Destination"].asString ()))
        return RPC::invalid_field_error ("tx_json.Destination");

    if (tx_json.isMember ("Paths") && params.isMember ("build_path"))
        return RPC::make_error (rpcINVALID_PARAMS,
            "Cannot specify both 'tx_json.Paths' and 'tx_json.build_path'");

    if (!tx_json.isMember ("Paths")
        && tx_json.isMember ("Amount")
        && params.isMember ("build_path"))
    {
        // Need a ripple path.
        STPathSet   spsPaths;
        uint160     uSrcCurrencyID;
        uint160     uSrcIssuerID;

        STAmount    saSendMax;

        if (tx_json.isMember ("SendMax"))
        {
            if (!saSendMax.bSetJson (tx_json ["SendMax"]))
                return RPC::invalid_field_error ("tx_json.SendMax");
        }
        else
        {
            // If no SendMax, default to Amount with sender as issuer.
            saSendMax = amount;
            saSendMax.setIssuer (raSrcAddressID.getAccountID ());
        }

        if (saSendMax.isNative () && amount.isNative ())
            return RPC::make_error (rpcINVALID_PARAMS,
                "Cannot build STR to STR paths.");

        {
            LegacyPathFind lpf (role == Config::ADMIN);
            if (!lpf.isOk ())
                return rpcError (rpcTOO_BUSY);

            bool bValid;
            auto cache = boost::make_shared<RippleLineCache> (lSnapshot);
            Pathfinder pf (cache, raSrcAddressID, dstAccountID,
                           saSendMax.getCurrency (), saSendMax.getIssuer (),
                           amount, bValid);

            STPath extraPath;
            if (!bValid || !pf.findPaths (getConfig ().PATH_SEARCH_OLD, 4, spsPaths, extraPath))
            {
                WriteLog (lsDEBUG, RPCHandler)
                        << "transactionSign: build_path: No paths found.";
                return rpcError (rpcNO_PATH);
            }
            WriteLog (lsDEBUG, RPCHandler)
                    << "transactionSign: build_path: "
                    << spsPaths.getJson (0);

            if (!spsPaths.isEmpty ())
                tx_json["Paths"] = spsPaths.getJson (0);
        }
    }
    return Json::Value();
}