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7b936de32c
* Set enforce date: September 15, 2014 * Enforce in stand alone mode * Enforce at source * Enforce intermediary nodes * Enforce global freeze in get paths out * Enforce global freeze in create offer * Don't consider frozen links a path out * Handle in getBookPage * Enforce in new offer transactors
554 lines
19 KiB
C++
554 lines
19 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#include <ripple/module/app/transactors/CreateOfferDirect.h>
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#include <ripple/module/app/transactors/CreateOfferBridged.h>
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#include <ripple/module/app/book/OfferStream.h>
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#include <ripple/module/app/book/Taker.h>
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#include <ripple/module/app/book/Types.h>
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namespace ripple {
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CreateOffer::CreateOffer (
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SerializedTransaction const& txn,
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TransactionEngineParams params,
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TransactionEngine* engine)
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: Transactor (
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txn,
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params,
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engine,
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deprecatedLogs().journal("CreateOffer"))
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{
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}
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TER
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CreateOffer::checkAcceptAsset(IssueRef issue) const
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{
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/* Only valid for custom currencies */
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assert (!isXRP (issue.currency));
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SLE::pointer const issuerAccount = mEngine->entryCache (
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ltACCOUNT_ROOT, Ledger::getAccountRootIndex (issue.account));
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if (!issuerAccount)
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{
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if (m_journal.warning) m_journal.warning <<
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"delay: can't receive IOUs from non-existent issuer: " <<
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to_string (issue.account);
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return (mParams & tapRETRY)
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? terNO_ACCOUNT
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: tecNO_ISSUER;
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}
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if (issuerAccount->getFieldU32 (sfFlags) & lsfRequireAuth)
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{
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SLE::pointer const trustLine (mEngine->entryCache (
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ltRIPPLE_STATE, Ledger::getRippleStateIndex (
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mTxnAccountID, issue.account, issue.currency)));
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if (!trustLine)
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{
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return (mParams & tapRETRY)
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? terNO_LINE
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: tecNO_LINE;
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}
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// Entries have a canonical representation, determined by a
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// lexicographical "greater than" comparison employing strict weak
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// ordering. Determine which entry we need to access.
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bool const canonical_gt (mTxnAccountID > issue.account);
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bool const is_authorized (trustLine->getFieldU32 (sfFlags) &
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(canonical_gt ? lsfLowAuth : lsfHighAuth));
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if (!is_authorized)
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{
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if (m_journal.debug) m_journal.debug <<
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"delay: can't receive IOUs from issuer without auth.";
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return (mParams & tapRETRY)
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? terNO_AUTH
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: tecNO_AUTH;
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}
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}
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return tesSUCCESS;
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}
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TER
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CreateOffer::doApply ()
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{
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if (m_journal.debug) m_journal.debug <<
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"OfferCreate> " << mTxn.getJson (0);
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std::uint32_t const uTxFlags = mTxn.getFlags ();
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bool const bPassive (uTxFlags & tfPassive);
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bool const bImmediateOrCancel (uTxFlags & tfImmediateOrCancel);
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bool const bFillOrKill (uTxFlags & tfFillOrKill);
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bool const bSell (uTxFlags & tfSell);
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STAmount saTakerPays = mTxn.getFieldAmount (sfTakerPays);
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STAmount saTakerGets = mTxn.getFieldAmount (sfTakerGets);
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if (!saTakerPays.isLegalNet () || !saTakerGets.isLegalNet ())
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return temBAD_AMOUNT;
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auto const& uPaysIssuerID = saTakerPays.getIssuer ();
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auto const& uPaysCurrency = saTakerPays.getCurrency ();
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auto const& uGetsIssuerID = saTakerGets.getIssuer ();
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auto const& uGetsCurrency = saTakerGets.getCurrency ();
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bool const bHaveExpiration (mTxn.isFieldPresent (sfExpiration));
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bool const bHaveCancel (mTxn.isFieldPresent (sfOfferSequence));
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std::uint32_t const uExpiration = mTxn.getFieldU32 (sfExpiration);
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std::uint32_t const uCancelSequence = mTxn.getFieldU32 (sfOfferSequence);
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// FIXME understand why we use SequenceNext instead of current transaction
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// sequence to determine the transaction. Why is the offer seuqnce
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// number insufficient?
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std::uint32_t const uAccountSequenceNext = mTxnAccount->getFieldU32 (sfSequence);
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std::uint32_t const uSequence = mTxn.getSequence ();
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const uint256 uLedgerIndex = Ledger::getOfferIndex (mTxnAccountID, uSequence);
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if (m_journal.debug)
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{
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m_journal.debug <<
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"Creating offer node: " << to_string (uLedgerIndex) <<
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" uSequence=" << uSequence;
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if (bImmediateOrCancel)
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m_journal.debug << "Transaction: IoC set.";
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if (bFillOrKill)
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m_journal.debug << "Transaction: FoK set.";
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}
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// This is the original rate of this offer, and is the rate at which it will
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// be placed, even if crossing offers change the amounts.
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std::uint64_t const uRate = STAmount::getRate (saTakerGets, saTakerPays);
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TER terResult (tesSUCCESS);
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// This is the ledger view that we work against. Transactions are applied
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// as we go on processing transactions.
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core::LedgerView& view (mEngine->view ());
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// This is a checkpoint with just the fees paid. If something goes wrong
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// with this transaction, we roll back to this ledger.
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core::LedgerView view_checkpoint (view);
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view.bumpSeq (); // Begin ledger variance.
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SLE::pointer sleCreator = mEngine->entryCache (
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ltACCOUNT_ROOT, Ledger::getAccountRootIndex (mTxnAccountID));
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if (uTxFlags & tfOfferCreateMask)
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{
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if (m_journal.debug) m_journal.debug <<
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"Malformed transaction: Invalid flags set.";
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terResult = temINVALID_FLAG;
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}
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else if (bImmediateOrCancel && bFillOrKill)
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{
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if (m_journal.debug) m_journal.debug <<
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"Malformed transaction: both IoC and FoK set.";
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terResult = temINVALID_FLAG;
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}
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else if (bHaveExpiration && !uExpiration)
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{
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m_journal.warning <<
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"Malformed offer: bad expiration";
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terResult = temBAD_EXPIRATION;
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}
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else if (saTakerPays.isNative () && saTakerGets.isNative ())
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{
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m_journal.warning <<
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"Malformed offer: XRP for XRP";
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terResult = temBAD_OFFER;
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}
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else if (saTakerPays <= zero || saTakerGets <= zero)
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{
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m_journal.warning <<
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"Malformed offer: bad amount";
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terResult = temBAD_OFFER;
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}
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else if (uPaysCurrency == uGetsCurrency && uPaysIssuerID == uGetsIssuerID)
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{
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m_journal.warning <<
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"Malformed offer: redundant offer";
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terResult = temREDUNDANT;
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}
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// We don't allow a non-native currency to use the currency code XRP.
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else if (badCurrency() == uPaysCurrency || badCurrency() == uGetsCurrency)
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{
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m_journal.warning <<
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"Malformed offer: Bad currency.";
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terResult = temBAD_CURRENCY;
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}
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else if (saTakerPays.isNative () != !uPaysIssuerID ||
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saTakerGets.isNative () != !uGetsIssuerID)
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{
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m_journal.warning <<
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"Malformed offer: bad issuer";
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terResult = temBAD_ISSUER;
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}
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else if (view.isGlobalFrozen (uPaysIssuerID) || view.isGlobalFrozen (uGetsIssuerID))
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{
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m_journal.warning <<
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"Offer involves frozen asset";
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terResult = tecFROZEN;
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}
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else if (view.accountFunds (
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mTxnAccountID, saTakerGets, fhZERO_IF_FROZEN) <= zero)
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{
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m_journal.warning <<
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"delay: Offers must be at least partially funded.";
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terResult = tecUNFUNDED_OFFER;
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}
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// This can probably be simplified to make sure that you cancel sequences
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// before the transaction sequence number.
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else if (bHaveCancel && (!uCancelSequence || uAccountSequenceNext - 1 <= uCancelSequence))
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{
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if (m_journal.debug) m_journal.debug <<
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"uAccountSequenceNext=" << uAccountSequenceNext <<
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" uOfferSequence=" << uCancelSequence;
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terResult = temBAD_SEQUENCE;
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}
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if (terResult != tesSUCCESS)
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{
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if (m_journal.debug) m_journal.debug <<
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"final terResult=" << transToken (terResult);
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return terResult;
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}
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// Process a cancellation request that's passed along with an offer.
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if ((terResult == tesSUCCESS) && bHaveCancel)
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{
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uint256 const uCancelIndex (
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Ledger::getOfferIndex (mTxnAccountID, uCancelSequence));
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SLE::pointer sleCancel = mEngine->entryCache (ltOFFER, uCancelIndex);
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// It's not an error to not find the offer to cancel: it might have
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// been consumed or removed as we are processing.
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if (sleCancel)
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{
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m_journal.warning <<
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"Cancelling order with sequence " << uCancelSequence;
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terResult = view.offerDelete (sleCancel);
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}
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}
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// Expiration is defined in terms of the close time of the parent ledger,
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// because we definitively know the time that it closed but we do not
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// know the closing time of the ledger that is under construction.
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if (bHaveExpiration &&
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(mEngine->getLedger ()->getParentCloseTimeNC () >= uExpiration))
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{
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return tesSUCCESS;
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}
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// Make sure that we are authorized to hold what the taker will pay us.
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if (terResult == tesSUCCESS && !saTakerPays.isNative ())
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terResult = checkAcceptAsset (Issue (uPaysCurrency, uPaysIssuerID));
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bool crossed = false;
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bool const bOpenLedger (mParams & tapOPEN_LEDGER);
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if (terResult == tesSUCCESS)
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{
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// We reverse gets and pays because during offer crossing we are taking.
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core::Amounts const taker_amount (saTakerGets, saTakerPays);
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// The amount of the offer that we will need to place, after we finish
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// offer crossing processing. It may be equal to the original amount,
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// empty (fully crossed), or something in-between.
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core::Amounts place_offer;
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std::tie(terResult, place_offer) = crossOffers (view, taker_amount);
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if (terResult == tecFAILED_PROCESSING && bOpenLedger)
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terResult = telFAILED_PROCESSING;
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if (terResult == tesSUCCESS)
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{
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// We now need to reduce the offer by the cross flow. We reverse
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// in and out here, since during crossing we were takers.
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assert (saTakerPays.getCurrency () == place_offer.out.getCurrency ());
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assert (saTakerPays.getIssuer () == place_offer.out.getIssuer ());
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assert (saTakerGets.getCurrency () == place_offer.in.getCurrency ());
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assert (saTakerGets.getIssuer () == place_offer.in.getIssuer ());
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if (taker_amount != place_offer)
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crossed = true;
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if (m_journal.debug)
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{
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m_journal.debug << "Offer Crossing: " << transToken (terResult);
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if (terResult == tesSUCCESS)
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{
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m_journal.debug <<
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" takerPays: " << saTakerPays.getFullText () <<
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" -> " << place_offer.out.getFullText ();
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m_journal.debug <<
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" takerGets: " << saTakerGets.getFullText () <<
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" -> " << place_offer.in.getFullText ();
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}
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}
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saTakerPays = place_offer.out;
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saTakerGets = place_offer.in;
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}
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}
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if (terResult != tesSUCCESS)
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{
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m_journal.debug <<
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"final terResult=" << transToken (terResult);
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return terResult;
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}
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if (m_journal.debug)
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{
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m_journal.debug <<
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"takeOffers: saTakerPays=" <<saTakerPays.getFullText ();
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m_journal.debug <<
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"takeOffers: saTakerGets=" << saTakerGets.getFullText ();
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m_journal.debug <<
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"takeOffers: mTxnAccountID=" <<
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to_string (mTxnAccountID);
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m_journal.debug <<
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"takeOffers: FUNDS=" << view.accountFunds (
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mTxnAccountID, saTakerGets, fhZERO_IF_FROZEN).getFullText ();
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}
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if (saTakerPays < zero || saTakerGets < zero)
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{
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// Earlier, we verified that the amounts, as specified in the offer,
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// were not negative. That they are now suggests that something went
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// very wrong with offer crossing.
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m_journal.fatal << (crossed ? "Partially consumed" : "Full") <<
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" offer has negative component:" <<
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" pays=" << saTakerPays.getFullText () <<
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" gets=" << saTakerGets.getFullText ();
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assert (saTakerPays >= zero);
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assert (saTakerGets >= zero);
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return tefINTERNAL;
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}
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if (bFillOrKill && (saTakerPays != zero || saTakerGets != zero))
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{
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// Fill or kill and have leftovers.
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view.swapWith (view_checkpoint); // Restore with just fees paid.
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return tesSUCCESS;
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}
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// What the reserve would be if this offer was placed.
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auto const accountReserve (mEngine->getLedger ()->getReserve (
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sleCreator->getFieldU32 (sfOwnerCount) + 1));
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if (saTakerPays == zero || // Wants nothing more.
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saTakerGets == zero || // Offering nothing more.
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bImmediateOrCancel) // Do not persist.
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{
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// Complete as is.
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}
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else if (mPriorBalance.getNValue () < accountReserve)
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{
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// If we are here, the signing account had an insufficient reserve
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// *prior* to our processing. We use the prior balance to simplify
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// client writing and make the user experience better.
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if (bOpenLedger) // Ledger is not final, can vote no.
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{
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// Hope for more reserve to come in or more offers to consume. If we
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// specified a local error this transaction will not be retried, so
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// specify a tec to distribute the transaction and allow it to be
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// retried. In particular, it may have been successful to a
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// degree (partially filled) and if it hasn't, it might succeed.
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terResult = tecINSUF_RESERVE_OFFER;
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}
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else if (!crossed)
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{
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// Ledger is final, insufficent reserve to create offer, processed
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// nothing.
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terResult = tecINSUF_RESERVE_OFFER;
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}
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else
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{
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// Ledger is final, insufficent reserve to create offer, processed
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// something.
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// Consider the offer unfunded. Treat as tesSUCCESS.
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}
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}
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else
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{
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assert (saTakerPays > zero);
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assert (saTakerGets > zero);
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// We need to place the remainder of the offer into its order book.
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if (m_journal.debug) m_journal.debug <<
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"offer not fully consumed:" <<
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" saTakerPays=" << saTakerPays.getFullText () <<
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" saTakerGets=" << saTakerGets.getFullText ();
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std::uint64_t uOwnerNode;
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std::uint64_t uBookNode;
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uint256 uDirectory;
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// Add offer to owner's directory.
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terResult = view.dirAdd (uOwnerNode,
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Ledger::getOwnerDirIndex (mTxnAccountID), uLedgerIndex,
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std::bind (
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&Ledger::ownerDirDescriber, std::placeholders::_1,
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std::placeholders::_2, mTxnAccountID));
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if (tesSUCCESS == terResult)
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{
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// Update owner count.
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view.ownerCountAdjust (mTxnAccountID, 1, sleCreator);
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uint256 const uBookBase (Ledger::getBookBase (
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{{uPaysCurrency, uPaysIssuerID},
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{uGetsCurrency, uGetsIssuerID}}));
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if (m_journal.debug) m_journal.debug <<
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"adding to book: " << to_string (uBookBase) <<
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" : " << saTakerPays.getHumanCurrency () <<
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"/" << to_string (saTakerPays.getIssuer ()) <<
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" -> " << saTakerGets.getHumanCurrency () <<
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"/" << to_string (saTakerGets.getIssuer ());
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// We use the original rate to place the offer.
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uDirectory = Ledger::getQualityIndex (uBookBase, uRate);
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// Add offer to order book.
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terResult = view.dirAdd (uBookNode, uDirectory, uLedgerIndex,
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std::bind (
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&Ledger::qualityDirDescriber, std::placeholders::_1,
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std::placeholders::_2, saTakerPays.getCurrency (),
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uPaysIssuerID, saTakerGets.getCurrency (),
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uGetsIssuerID, uRate));
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}
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if (tesSUCCESS == terResult)
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{
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if (m_journal.debug)
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{
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m_journal.debug <<
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"sfAccount=" <<
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to_string (mTxnAccountID);
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m_journal.debug <<
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"uPaysIssuerID=" <<
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to_string (uPaysIssuerID);
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m_journal.debug <<
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"uGetsIssuerID=" <<
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to_string (uGetsIssuerID);
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m_journal.debug <<
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"saTakerPays.isNative()=" <<
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saTakerPays.isNative ();
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m_journal.debug <<
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"saTakerGets.isNative()=" <<
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saTakerGets.isNative ();
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m_journal.debug <<
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"uPaysCurrency=" <<
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saTakerPays.getHumanCurrency ();
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m_journal.debug <<
|
|
"uGetsCurrency=" <<
|
|
saTakerGets.getHumanCurrency ();
|
|
}
|
|
|
|
SLE::pointer sleOffer (mEngine->entryCreate (ltOFFER, uLedgerIndex));
|
|
|
|
sleOffer->setFieldAccount (sfAccount, mTxnAccountID);
|
|
sleOffer->setFieldU32 (sfSequence, uSequence);
|
|
sleOffer->setFieldH256 (sfBookDirectory, uDirectory);
|
|
sleOffer->setFieldAmount (sfTakerPays, saTakerPays);
|
|
sleOffer->setFieldAmount (sfTakerGets, saTakerGets);
|
|
sleOffer->setFieldU64 (sfOwnerNode, uOwnerNode);
|
|
sleOffer->setFieldU64 (sfBookNode, uBookNode);
|
|
|
|
if (uExpiration)
|
|
sleOffer->setFieldU32 (sfExpiration, uExpiration);
|
|
|
|
if (bPassive)
|
|
sleOffer->setFlag (lsfPassive);
|
|
|
|
if (bSell)
|
|
sleOffer->setFlag (lsfSell);
|
|
|
|
if (m_journal.debug) m_journal.debug <<
|
|
"final terResult=" << transToken (terResult) <<
|
|
" sleOffer=" << sleOffer->getJson (0);
|
|
}
|
|
}
|
|
|
|
if (terResult != tesSUCCESS)
|
|
{
|
|
m_journal.debug <<
|
|
"final terResult=" << transToken (terResult);
|
|
}
|
|
|
|
return terResult;
|
|
}
|
|
|
|
std::unique_ptr <Transactor> make_CreateOffer (
|
|
SerializedTransaction const& txn,
|
|
TransactionEngineParams params,
|
|
TransactionEngine* engine)
|
|
{
|
|
#if RIPPLE_ENABLE_AUTOBRIDGING
|
|
STAmount const& amount_in = txn.getFieldAmount (sfTakerPays);
|
|
STAmount const& amount_out = txn.getFieldAmount (sfTakerGets);
|
|
|
|
// Autobridging is only in effect when an offer does not involve XRP
|
|
if (!amount_in.isNative() && !amount_out.isNative ())
|
|
return std::make_unique <CreateOfferBridged> (txn, params, engine);
|
|
#endif
|
|
|
|
return std::make_unique <CreateOfferDirect> (txn, params, engine);
|
|
}
|
|
|
|
}
|