Function ApplyTxInUndo

src/main.cpp:2345–2375

};

static DisconnectResult ApplyTxInUndo(const CTxInUndo& undo, CCoinsViewCache& view, const COutPoint& out) {
    bool fClean = true;

    CCoinsModifier coins = view.ModifyCoins(out.hash);
    if (undo.nHeight != 0) {
        if (!coins->IsPruned()) {
            LogPrintf("%s: Avoid data that will overwrite the transaction", __func__);
            fClean = false;
        }
        coins->Clear();
        coins->fCoinBase = undo.fCoinBase;
        coins->fCoinStake = undo.fCoinStake;
        coins->nHeight = undo.nHeight;
        coins->nVersion = undo.nVersion;
    } else {
        if (coins->IsPruned()) {
            LogPrintf("%s: undo data adding output to missing transaction", __func__);
            fClean = false;
        }
    }
    if (coins->IsAvailable(out.n)) {
        LogPrintf("%s: undo data overwriting existing output", __func__);
        fClean = false;
    }

    if (coins->vout.size() < out.n + 1)
        coins->vout.resize(out.n + 1);
    coins->vout[out.n] = undo.txout;

    return fClean ? DISCONNECT_OK : DISCONNECT_UNCLEAN;
}

bool UndoWriteToDisk(const CBlockUndo& blockundo, CDiskBlockPos& pos, const uint256& hashBlock);
bool UndoReadFromDisk(CBlockUndo& blockundo, const CDiskBlockPos& pos, const uint256& hashBlock);