  "mempoolminfee": 0.00000000

When the minrelaytxfee is > 0.

struct CCoinsStats
{
    int nHeight;
    uint256 hashBlock;
    uint64_t nTransactions;
    uint64_t nTransactionOutputs;
    uint64_t nBogoSize;
    uint256 hashSerialized;
    uint64_t nDiskSize;
    CAmount nTotalAmount;
    CCoinsStats() : nHeight(0), nTransactions(0), nTransactionOutputs(0), nBogoSize(0), nDiskSize(0), nTotalAmount(0) {}
};
static void ApplyStats(CCoinsStats &stats, CHashWriter& ss, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
{
    assert(!outputs.empty());
    ss << hash;
    ss << VARINT(outputs.begin()->second.nHeight * 2 + outputs.begin()->second.fCoinBase);
    stats.nTransactions++;
    for (const auto output : outputs) {
        ss << VARINT(output.first + 1);
        ss << output.second.out.scriptPubKey;
        ss << VARINT(output.second.out.nValue);
        stats.nTransactionOutputs++;
        stats.nTotalAmount += output.second.out.nValue;
        stats.nBogoSize += 32  + 4  + 4  + 8  +
                           2  + output.second.out.scriptPubKey.size() ;
    }
    ss << VARINT(0);
}
static bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)