Method ScanForWalletTransactions

src/wallet.cpp:1633–1704

* Scan the block chain (starting in pindexStart) for transactions * from or to us. If fUpdate is true, found transactions that already * exist in the wallet will be updated. */

 * exist in the wallet will be updated.
 */
int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
{
    int ret = 0;
    int64_t nNow = GetTime();

    CBlockIndex* pindex = pindexStart;
    {
        //LOCK2(cs_main, cs_wallet);

        // no need to read and scan block, if block was created before
        // our wallet birthday (as adjusted for block time variability)
        while (pindex && nTimeFirstKey && (pindex->GetBlockTime() < (nTimeFirstKey - 7200)))
            pindex = chainActive.Next(pindex);

        fAbortRescan = false;
        ShowProgress(_("Rescanning..."), 0); // show rescan progress in GUI as dialog or on splashscreen, if -rescan on startup

        int dProgressTip;
        {
            LOCK(cs_main);
            dProgressTip = chainActive.Height();
        }

        int dProgressStart = pindex ? pindex->nHeight : 0;
        int dProgressCurrent = dProgressStart;
        int dProgressTotal = dProgressTip - dProgressStart;
        int dProgressShow = 0;
        int dProgressShowPrev = 0;

        while (pindex && !fAbortRescan && !ShutdownRequested()) {
            dProgressShow = std::min(99, (int) (((dProgressCurrent - dProgressStart) * 100) / dProgressTotal));
            dProgressShow = std::max(1, dProgressShow);

            if ((pindex->nHeight % 100 == 0) && (dProgressTotal > 0))
            {
                if (dProgressShowPrev != dProgressShow)
                {
                    dProgressShowPrev = dProgressShow;
                    ShowProgress(_("Rescanning..."), dProgressShow);
                }
            }

            if (GetTime() >= nNow + 60) {
                nNow = GetTime();
                LogPrintf("Still rescanning. At block %d. Progress=%f\n", pindex->nHeight, dProgressShow);
            }

            CBlock block;
            ReadBlockFromDisk(block, pindex, Params().GetConsensus());
            {
                LOCK(cs_wallet);
                for (CTransaction& tx : block.vtx) {
                    SyncTransaction(tx, &block);
                }
            }

            pindex = chainActive.Next(pindex);