Method SetTimePoint

src/txrequest.cpp:492–521

Make the data structure consistent with a given point in time: - REQUESTED announcements with expiry <= now are turned into COMPLETED. - CANDIDATE_DELAYED announcements with reqtime <= now are turned into CANDIDATE_{READY,BEST}. - CANDIDATE_{READY,BEST} announcements with reqtime > now are turned into CANDIDATE_DELAYED.

    //! - CANDIDATE_DELAYED announcements with reqtime <= now are turned into CANDIDATE_{READY,BEST}.
    //! - CANDIDATE_{READY,BEST} announcements with reqtime > now are turned into CANDIDATE_DELAYED.
    void SetTimePoint(std::chrono::microseconds now, std::vector<std::pair<NodeId, GenTxid>>* expired)
    {
        if (expired) expired->clear();

        // Iterate over all CANDIDATE_DELAYED and REQUESTED from old to new, as long as they're in the past,
        // and convert them to CANDIDATE_READY and COMPLETED respectively.
        while (!m_index.empty()) {
            auto it = m_index.get<ByTime>().begin();
            if (it->GetState() == State::CANDIDATE_DELAYED && it->m_time <= now) {
                PromoteCandidateReady(m_index.project<ByTxHash>(it));
            } else if (it->GetState() == State::REQUESTED && it->m_time <= now) {
                if (expired) expired->emplace_back(it->m_peer, ToGenTxid(*it));
                MakeCompleted(m_index.project<ByTxHash>(it));
            } else {
                break;
            }
        }

        while (!m_index.empty()) {
            // If time went backwards, we may need to demote CANDIDATE_BEST and CANDIDATE_READY announcements back
            // to CANDIDATE_DELAYED. This is an unusual edge case, and unlikely to matter in production. However,
            // it makes it much easier to specify and test TxRequestTracker::Impl's behaviour.
            auto it = std::prev(m_index.get<ByTime>().end());
            if (it->IsSelectable() && it->m_time > now) {
                ChangeAndReselect(m_index.project<ByTxHash>(it), State::CANDIDATE_DELAYED);
            } else {
                break;
            }
        }
    }

public:
    explicit Impl(bool deterministic) :