  "mempoolminfee": 0.00000000

When the minrelaytxfee is > 0.

{
    UniValue rv(UniValue::VOBJ);
    bool activated = false;
    switch(version)
    {
        case 2:
            activated = pindex->nHeight >= consensusParams.BIP34Height;
            break;
        case 3:
            activated = pindex->nHeight >= consensusParams.BIP66Height;
            break;
        case 4:
            activated = pindex->nHeight >= consensusParams.BIP65Height;
            break;
    }
    rv.push_back(Pair("status", activated));
    return rv;
}
static UniValue SoftForkDesc(const std::string &name, int version, CBlockIndex* pindex, const Consensus::Params& consensusParams)