Method Exists

src/persistence/leveldbwrapper.h:205–216

    }

    bool Exists(const std::string &key) {
    	leveldb::Slice slKey(key);
        string strValue;
        leveldb::Status status = pdb->Get(readoptions, slKey, &strValue);
        if (!status.ok()) {
            if (status.IsNotFound())
                return false;
            LogPrint(BCLog::INFO,"LevelDB read failure: %s\n", status.ToString().c_str());
            ThrowError(status);
        }
        return true;
    }

    bool Erase(const string& key, bool fSync = false) {
        CLevelDBBatch batch;