ConsensusTransSetSF.cpp

#include <xrpld/app/ledger/ConsensusTransSetSF.h>
 
#include <xrpld/app/ledger/TransactionMaster.h>
#include <xrpld/app/misc/Transaction.h>
 
#include <xrpl/basics/Blob.h>
#include <xrpl/basics/Log.h>
#include <xrpl/basics/SHAMapHash.h>
#include <xrpl/beast/utility/instrumentation.h>
#include <xrpl/core/Job.h>
#include <xrpl/core/JobQueue.h>
#include <xrpl/protocol/HashPrefix.h>
#include <xrpl/protocol/Serializer.h>
#include <xrpl/protocol/digest.h>  // IWYU pragma: keep
#include <xrpl/server/NetworkOPs.h>
#include <xrpl/shamap/SHAMapTreeNode.h>
 
#include <cstdint>
#include <exception>
#include <functional>
#include <memory>
#include <optional>
 
namespace xrpl {
 
ConsensusTransSetSF::ConsensusTransSetSF(Application& app, NodeCache& nodeCache)
    : app_(app), nodeCache_(nodeCache), j_(app.getJournal("TransactionAcquire"))
{
}
 
void
ConsensusTransSetSF::gotNode(
    bool fromFilter,
    SHAMapHash const& nodeHash,
    std::uint32_t,
    Blob&& nodeData,  // NOLINT(cppcoreguidelines-rvalue-reference-param-not-moved)
    SHAMapNodeType type) const
{
    if (fromFilter)
        return;
 
    nodeCache_.insert(nodeHash, nodeData);
 
    if ((type == SHAMapNodeType::TnTransactionNm) && (nodeData.size() > 16))
    {
        // this is a transaction, and we didn't have it
        JLOG(j_.debug()) << "Node on our acquiring TX set is TXN we may not have";
 
        try
        {
            // skip prefix
            Serializer const s(nodeData.data() + 4, nodeData.size() - 4);
            SerialIter sit(s.slice());
            auto stx = std::make_shared<STTx const>(std::ref(sit));
            XRPL_ASSERT(
                stx->getTransactionID() == nodeHash.asUInt256(),
                "xrpl::ConsensusTransSetSF::gotNode : transaction hash "
                "match");
            auto const pap = &app_;
            app_.getJobQueue().addJob(
                JtTransaction, "TxsToTxn", [pap, stx]() { pap->getOPs().submitTransaction(stx); });
        }
        catch (std::exception const& ex)
        {
            JLOG(j_.warn()) << "Fetched invalid transaction in proposed set. Exception: "
                            << ex.what();
        }
    }
}
 
std::optional<Blob>
ConsensusTransSetSF::getNode(SHAMapHash const& nodeHash) const
{
    Blob nodeData;
    if (nodeCache_.retrieve(nodeHash, nodeData))
        return nodeData;
 
    auto txn = app_.getMasterTransaction().fetchFromCache(nodeHash.asUInt256());
 
    if (txn)
    {
        // this is a transaction, and we have it
        JLOG(j_.trace()) << "Node in our acquiring TX set is TXN we have";
        Serializer s;
        s.add32(HashPrefix::TransactionId);
        txn->getSTransaction()->add(s);
        XRPL_ASSERT(
            sha512Half(s.slice()) == nodeHash.asUInt256(),
            "xrpl::ConsensusTransSetSF::getNode : transaction hash match");
        nodeData = s.peekData();
        return nodeData;
    }
 
    return std::nullopt;
}
 
}  // namespace xrpl