There are some potential feefilter cleanups mentioned and motivated in comment https://github.com/bitcoin/bitcoin/pull/21509#issuecomment-805808485 . If you address the locking one, please be careful and make sure that `round()` is only called under a lock. See https://github.com/bitcoin/bitcoin/pull/21509#issuecomment-807992199

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{
    auto txinfo = m_mempool.info(gtxid);
    if (txinfo.tx) {
        
        
        
        if ((mempool_req.count() && txinfo.m_time <= mempool_req) || txinfo.m_time <= now - UNCONDITIONAL_RELAY_DELAY) {
            return std::move(txinfo.tx);
        }
    }
    {
        LOCK(cs_main);
        
        if (State(peer.GetId())->m_recently_announced_invs.contains(gtxid.GetHash())) {
            
            if (txinfo.tx) return std::move(txinfo.tx);
            
            auto mi = mapRelay.find(gtxid.GetHash());
            if (mi != mapRelay.end()) return mi->second;
        }
    }
    return {};
}
void PeerManagerImpl::ProcessGetData(CNode& pfrom, Peer& peer, const std::atomic<bool>& interruptMsgProc)