Method GuessVerificationProgress

src/validation.cpp:5509–5544

}

double ChainstateManager::GuessVerificationProgress(const CBlockIndex* pindex) const
{
    AssertLockHeld(GetMutex());
    const ChainTxData& data{GetParams().TxData()};
    if (pindex == nullptr) {
        return 0.0;
    }

    if (pindex->m_chain_tx_count == 0) {
        LogDebug(BCLog::VALIDATION, "Block %d has unset m_chain_tx_count. Unable to estimate verification progress.\n", pindex->nHeight);
        return 0.0;
    }

    const int64_t nNow{TicksSinceEpoch<std::chrono::seconds>(NodeClock::now())};
    const auto block_time{
        (Assume(m_best_header) && std::abs(nNow - pindex->GetBlockTime()) <= Ticks<std::chrono::seconds>(2h) &&
         Assume(m_best_header->nHeight >= pindex->nHeight)) ?
            // When the header is known to be recent, switch to a height-based
            // approach. This ensures the returned value is quantized when
            // close to "1.0", because some users expect it to be. This also
            // avoids relying too much on the exact miner-set timestamp, which
            // may be off.
            nNow - (m_best_header->nHeight - pindex->nHeight) * GetConsensus().nPowTargetSpacing :
            pindex->GetBlockTime(),
    };

    double fTxTotal;

    if (pindex->m_chain_tx_count <= data.tx_count) {
        fTxTotal = data.tx_count + (nNow - data.nTime) * data.dTxRate;
    } else {
        fTxTotal = pindex->m_chain_tx_count + (nNow - block_time) * data.dTxRate;
    }

    return std::min<double>(pindex->m_chain_tx_count / fTxTotal, 1.0);
}

double ChainstateManager::GetBackgroundVerificationProgress(const CBlockIndex& pindex) const
{