Example of streaming a file to blake2

blake2-fs-stream.js

'use strict';

// Dependencies
const blake2 = require('blake2'),
      fs = require('fs');

// Setup the blake2eb hash
const hash = new blake2.Hash('blake2b');
hash.setEncoding('hex');

// Setup a read stream of the "foo.js" file
const stream = fs.createReadStream('./foo.js');
stream.on('end', function(){
  // When the stream finishes,
  // create the blake2 hash
  hash.end();
  const digest = hash.read();
  console.log(digest);
});

// Start piping the file to blake2
stream.pipe(hash);