Trouble with upload attachment with REST API

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1

I have next code, but it throws “Bad request. Status code: 400”. What is wrong with code below (size of file from link 0.1mb, its png image):

const res = await fetch(mediaUrl);

const arrayBuffer = await res.arrayBuffer();
const buffer = Buffer.from(arrayBuffer);
const filename = mediaUrl.split('/').pop();
const contentType =
  res.headers.get('content-type') || 'application/octet-stream';

const formData = new FormData();

formData.append('file', buffer, {
  filename,
  contentType,
});

const response = await fetch(urlForAttach, {
  method: 'POST',
  headers: {
    Authorization: `${authHeader}`,
    'X-Atlassian-Token': 'no-check',
    Accept: 'application/json',
    ...formData.getHeaders(),
  },
  body: formData,
});