  "mempoolminfee": 0.00000000

When the minrelaytxfee is > 0.

{
    return "    \"size\" : n,             (numeric) virtual transaction size as defined in BIP 141. This is different from actual serialized size for witness transactions as witness data is discounted.\n"
           "    \"fee\" : n,              (numeric) transaction fee in " + CURRENCY_UNIT + "\n"
           "    \"modifiedfee\" : n,      (numeric) transaction fee with fee deltas used for mining priority\n"
           "    \"time\" : n,             (numeric) local time transaction entered pool in seconds since 1 Jan 1970 GMT\n"
           "    \"height\" : n,           (numeric) block height when transaction entered pool\n"
           "    \"descendantcount\" : n,  (numeric) number of in-mempool descendant transactions (including this one)\n"
           "    \"descendantsize\" : n,   (numeric) virtual transaction size of in-mempool descendants (including this one)\n"
           "    \"descendantfees\" : n,   (numeric) modified fees (see above) of in-mempool descendants (including this one)\n"
           "    \"ancestorcount\" : n,    (numeric) number of in-mempool ancestor transactions (including this one)\n"
           "    \"ancestorsize\" : n,     (numeric) virtual transaction size of in-mempool ancestors (including this one)\n"
           "    \"ancestorfees\" : n,     (numeric) modified fees (see above) of in-mempool ancestors (including this one)\n"
           "    \"wtxid\" : hash,         (string) hash of serialized transaction, including witness data\n"
           "    \"depends\" : [           (array) unconfirmed transactions used as inputs for this transaction\n"
           "        \"transactionid\",    (string) parent transaction id\n"
           "       ... ]\n";
}
void entryToJSON(UniValue &info, const CTxMemPoolEntry &e)