Method UpdatedBlockTip

src/net_processing.cpp:952–982

* Update our best height and announce any block hashes which weren't previously * in chainActive to our peers. */

 * in chainActive to our peers.
 */
void PeerLogicValidation::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) {
    const int nNewHeight = pindexNew->nHeight;
    connman->SetBestHeight(nNewHeight);

    SetServiceFlagsIBDCache(!fInitialDownload);
    if (!fInitialDownload) {
        // Find the hashes of all blocks that weren't previously in the best chain.
        std::vector<uint256> vHashes;
        const CBlockIndex *pindexToAnnounce = pindexNew;
        while (pindexToAnnounce != pindexFork) {
            vHashes.push_back(pindexToAnnounce->GetBlockHash());
            pindexToAnnounce = pindexToAnnounce->pprev;
            if (vHashes.size() == MAX_BLOCKS_TO_ANNOUNCE) {
                // Limit announcements in case of a huge reorganization.
                // Rely on the peer's synchronization mechanism in that case.
                break;
            }
        }
        // Relay inventory, but don't relay old inventory during initial block download.
        connman->ForEachNode([nNewHeight, &vHashes](CNode* pnode) {
            if (nNewHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 0)) {
                for (const uint256& hash : reverse_iterate(vHashes)) {
                    pnode->PushBlockHash(hash);
                }
            }
        });
        connman->WakeMessageHandler();
    }

    nTimeBestReceived = GetTime();
}

/**
 * Handle invalid block rejection and consequent peer banning, maintain which