random 1024 bytes of binary data

random1024.js

const crypto = require('crypto')
const fs = require('fs')
const util = require('util')

const writeFile = util.promisify(fs.writeFile)
const randomBytes = util.promisify(crypto.randomBytes)

void async function () {

    const data = await randomBytes(1024)
    writeFile('./random1024.bin', data)

}()