OfferCancel.cpp

#include <xrpl/tx/transactors/dex/OfferCancel.h>
 
#include <xrpl/basics/Log.h>
#include <xrpl/ledger/helpers/OfferHelpers.h>
#include <xrpl/protocol/Indexes.h>
#include <xrpl/protocol/SField.h>
#include <xrpl/protocol/STLedgerEntry.h>
#include <xrpl/protocol/STTx.h>
#include <xrpl/protocol/SeqProxy.h>
#include <xrpl/protocol/TER.h>
#include <xrpl/protocol/XRPAmount.h>
#include <xrpl/tx/Transactor.h>
 
namespace xrpl {
 
NotTEC
OfferCancel::preflight(PreflightContext const& ctx)
{
    if (ctx.tx[sfOfferSequence] == 0u)
    {
        JLOG(ctx.j.trace()) << "OfferCancel::preflight: missing sequence";
        return temBAD_SEQUENCE;
    }
 
    return tesSUCCESS;
}
 
//------------------------------------------------------------------------------
 
TER
OfferCancel::preclaim(PreclaimContext const& ctx)
{
    auto const id = ctx.tx[sfAccount];
    auto const offerSequence = ctx.tx[sfOfferSequence];
 
    auto const sle = ctx.view.read(keylet::account(id));
    if (!sle)
        return terNO_ACCOUNT;
 
    if ((*sle)[sfSequence] <= offerSequence)
    {
        JLOG(ctx.j.trace()) << "Malformed transaction: "
                            << "Sequence " << offerSequence << " is invalid.";
        return temBAD_SEQUENCE;
    }
 
    return tesSUCCESS;
}
 
//------------------------------------------------------------------------------
 
TER
OfferCancel::doApply()
{
    auto const offerSequence = ctx_.tx[sfOfferSequence];
 
    auto const sle = view().read(keylet::account(accountID_));
    if (!sle)
        return tefINTERNAL;  // LCOV_EXCL_LINE
 
    auto const seqProxy = SeqProxy::rawSequence(offerSequence);
    if (auto sleOffer = view().peek(keylet::offer(accountID_, seqProxy)))
    {
        JLOG(j_.debug()) << "Trying to cancel offer #" << offerSequence;
        return offerDelete(view(), sleOffer, ctx_.registry.get().getJournal("View"));
    }
 
    JLOG(j_.debug()) << "Offer #" << offerSequence << " can't be found.";
    return tesSUCCESS;
}
 
void
OfferCancel::visitInvariantEntry(bool, SLE::const_ref, SLE::const_ref)
{
    // No transaction-specific invariants yet (future work).
}
 
bool
OfferCancel::finalizeInvariants(STTx const&, TER, XRPAmount, ReadView const&, beast::Journal const&)
{
    // No transaction-specific invariants yet (future work).
    return true;
}
 
}  // namespace xrpl