Function UpdateTip

src/main.cpp:1309–1341

Update chainActive and related internal data structures.

// Update chainActive and related internal data structures.
void static UpdateTip(CBlockIndex *pIndexNew, const CBlock &block) {
    chainActive.SetTip(pIndexNew, &block);

    SyncTransaction(uint256(), nullptr, &block);

    // Update best block in wallet (so we can detect restored wallets)
    bool fIsInitialDownload = IsInitialBlockDownload();
    if ((chainActive.Height() % 20160) == 0 || (!fIsInitialDownload && (chainActive.Height() % 144) == 0))
        g_signals.SetBestChain(chainActive.GetLocator());

    // New best block
    SysCfg().SetBestRecvTime(GetTime());
    LogPrint(BCLog::INFO, "[%d] %s blkTxCnt=%d fuelRate=%d ts=%s\n",
             chainActive.Height(), chainActive.Tip()->GetBlockHash().ToString(),
             block.vptx.size(), chainActive.Tip()->nFuelRate,
             DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()));

    // Check the version of the last 100 blocks to see if we need to upgrade:
    if (!fIsInitialDownload) {
        int32_t nUpgraded             = 0;
        const CBlockIndex *pIndex = chainActive.Tip();
        for (int32_t i = 0; i < 100 && pIndex != nullptr; i++) {
            if (pIndex->nVersion > CBlock::CURRENT_VERSION)
                ++nUpgraded;
            pIndex = pIndex->pprev;
        }
        if (nUpgraded > 0)
            LogPrint(BCLog::INFO, "SetBestChain: %d of last 100 blocks above version %d\n", nUpgraded, (int32_t)CBlock::CURRENT_VERSION);
        if (nUpgraded > 100 / 2)
            // strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
            strMiscWarning = _("Warning: This version is obsolete, upgrade required!");
    }
}

// Disconnect chainActive's tip.
bool DisconnectTip(CValidationState &state) {