import { createHash } from 'node:crypto';

import { Readable } from 'node:stream';

function f1(info: NodeJS.ReadableStream) {

  return new Promise((resolve, reject) => {

    const hash = createHash('sha256');

    info.on('data', (data) => hash.update(data));

    info.on('end', () => resolve(hash.digest('hex')));

    info.on('error', (error) => reject(error));

  });

}

function f2(info: NodeJS.ReadableStream) {

  const hasher = createHash('sha256');

  return new Promise((resolve, reject) => {

    info.pipe(hasher)

      .on('finish', () => resolve(hasher.digest('hex')))

      .on('error', (error) => reject(error));

  });

}

export async function test() {

  const h1 = await f1(Readable.from('Testing'));

  const h2 = f2(Readable.from('Testing'));

  console.log(h1);

  console.log(h2);

}

test();