How to use the bindings.getFileName function in bindings

var fs = require('fs');
var AWS = require('aws-sdk');
var bindings = require('bindings');
var index = require('../lib');
var log = index.log;

var config = require(process.env.HOME + '/.bitcore-node-upload.json');

AWS.config.region = config.region;
AWS.config.update({
  accessKeyId: config.accessKeyId,
  secretAccessKey: config.secretAccessKey
});

var packageRoot = bindings.getRoot(bindings.getFileName());
var tarballName = require('./get-tarball-name')();
var bucketName = 'bitcore-node';
var url = 'https://' + bucketName + '.s3.amazonaws.com/' + tarballName;
var localPath = packageRoot + '/' + tarballName;

log.info('Uploading package: ' + localPath);

var fileStream = fs.createReadStream(localPath);

fileStream.on('error', function(err) {
  if (err) {
    throw err;
  }
});

fileStream.on('open', function() {

'use strict';

var exec = require('child_process').exec;
var bindings = require('bindings');
var index = require('../lib');
var log = index.log;

var packageRoot = bindings.getRoot(bindings.getFileName());
var binaryPath = bindings({
  path: true,
  bindings: 'bitcoind.node'
});
var relativeBinaryPath = binaryPath.replace(packageRoot + '/', '');
var tarballName = require('./get-tarball-name')();

log.info('Signing binding binary: "' + binaryPath + '"');

var signCommand = 'gpg --yes --out ' + binaryPath + '.sig --detach-sig ' + binaryPath;

var signchild = exec(signCommand, function(error, stdout, stderr) {
  if (error) {
    throw error;
  }