  "mempoolminfee": 0.00000000

When the minrelaytxfee is > 0.

#include "consensus/validation.h"
#include "validation.h"
#include "core_io.h"
#include "policy/feerate.h"
#include "policy/policy.h"
#include "primitives/transaction.h"
#include "rpc/server.h"
#include "streams.h"
#include "sync.h"
#include "txdb.h"
#include "txmempool.h"
#include "util.h"
#include "utilstrencodings.h"
#include "hash.h"
#include "warnings.h"
#include <stdint.h>
#include <univalue.h>
#include <boost/thread/thread.hpp> 
#include <mutex>
#include <condition_variable>
struct CUpdatedBlock
{
    uint256 hash;
    int height;
};
static std::mutex cs_blockchange;
static std::condition_variable cond_blockchange;
static CUpdatedBlock latestblock;
extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
double GetDifficulty(const CBlockIndex* blockindex)