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ReadFile in Base64 Nodejs

I’m trying to read an image from client side encoded in base64. How to read with nodejs?

My code:

// add to buffer base64 image
var encondedImage = new Buffer(, 'base64');

fs.readFile(encondedImage, "base64", function(err, buffer){
    if ( err ) {
        console.log('In read file')
    } else {
        // check err, 'jpg', function(err, image){
            console.log('in open')
            if ( err ) console.log(err)

            if ( image ) console.log(image)
            // check 'err'. use 'image'.
            // image.resize(...), etc.

But, I got this error:

In read file
[Error: Path must be a string without null bytes.]


Latest and greatest way to do this:

Node supports file and buffer operations with the base64 encoding:

const fs = require('fs');
const contents = fs.readFileSync('/path/to/file.jpg', {encoding: 'base64'});

Or using the new promises API:

const fs = require('fs').promises;
const contents = await fs.readFile('/path/to/file.jpg', {encoding: 'base64'});