wallet-core/node_modules/fs-extra/docs/pathExists.md

pathExists(file[, callback])

Test whether or not the given path exists by checking with the file system. Like fs.exists, but with a normal callback signature (err, exists). Uses fs.access under the hood.

• file <String>
• callback <Function>

Example:

const fs = require('fs-extra')

const file = '/tmp/this/path/does/not/exist/file.txt'
// Promise usage:
fs.pathExists(file)
  .then(exists => console.log(exists)) // => false
// Callback usage:
fs.pathExists(file, (err, exists) => {
  console.log(err) // => null
  console.log(exists) // => false
})