updateOrCreateConfig(username, password){
    const directory = process.platform === "win32" ? `${homedir}/appdata/roaming/eccoin` : `${homedir}/.eccoin`;
    const filePath = process.platform === "win32" ? `${homedir}/appdata/roaming/eccoin/eccoin.conf` : `${homedir}/.eccoin/eccoin.conf`;
    return new Promise((resolve, reject) => {
      fs.exists(filePath, (exists) => {
        if(!exists){
           //create
           const toWrite = "maxconnections=100" + os.EOL + "rpcuser=" + username + os.EOL + "rpcpassword=" + password + os.EOL + "addnode=www.cryptounited.io" + os.EOL + "rpcport=19119" + os.EOL + "rpcconnect=127.0.0.1" + os.EOL + "staking=0" + os.EOL + "zapwallettxes=0";
           fsPath.writeFile(filePath, toWrite, 'utf8', (err) => {
                if (err) {
                  console.log(err)
                  resolve(false);
                  return;
                }
                resolve(true);
            });
        }
        else{
          fs.readFile(filePath, 'utf8', (err, data) => {
            if (err) {
               console.log("readFile error: ", err);
               resolve(false);
               return;
            }
            var patt = /(rpcuser=(.*))/g
            var myArray = patt.exec(data);
            var result = data;;
            if(myArray && myArray.length > 2)
            {
              result = result.replace('rpcuser='+myArray[2], 'rpcuser='+username);
            }
            else{
              result += `${os.EOL}rpcuser=${username}`;
            }

            patt = /(rpcpassword=(.*))/g
            myArray = patt.exec(data);
            if(myArray && myArray.length > 2)
            {
              result = result.replace('rpcpassword='+myArray[2], 'rpcpassword='+password);
            }
            else{
              result += `${os.EOL}rpcpassword=${password}`;
            }

            fs.writeFile(filePath, result, 'utf8', (err) => {
              if(!err)
                resolve(true);
              else resolve(false);
            });
          });
        }
      });
    });
  },

  readRpcCredentials(){
    const directory = process.platform === "win32" ? `${homedir}/appdata/roaming/eccoin` : `${homedir}/.eccoin`;
    const filePath = process.platform === "win32" ? `${homedir}/appdata/roaming/eccoin/eccoin.conf` : `${homedir}/.eccoin/eccoin.conf`;
    var toReturn = null;
    return new Promise((resolve, reject) => {
      fs.exists(filePath, (exists) => {
        if(!exists){
           resolve(toReturn);
           return;
        }
        fs.readFile(filePath, 'utf8', (err, data) => {
          if (err) {
            console.log("readFile error: ", err);
            resolve(toReturn);
            return;
          }
          toReturn = {
            username: "",
            password: ""
          }
          var patt = /(rpcuser=(.*))/g
          var myArray = patt.exec(data);
          if(myArray && myArray.length > 2)
          {
            toReturn.username = myArray[2];
          }

          patt = /(rpcpassword=(.*))/g
          myArray = patt.exec(data);
          if(myArray && myArray.length > 2)
          {
            toReturn.password = myArray[2];
          }
          resolve(toReturn);
        });
      })
    });
  }