Upload file to UploadThing via their API with N8N

code.js

// Javascript CODE n8n node:

const items = $input.all();
const result = [];

for (const item of items) {
  const file = item.binary.data;
  const name = `${Date.now()}-${file.fileName}`;
  
  // throw new Error(JSON.stringify(file))
  const buffer = Buffer.from(file.data, 'base64');
  const size = buffer.length;
  const type = file.mimeType;

  const prepareBody = {
    fileType: type,
    fileName: name,
    fileSize: size,
    acl: 'public-read'
  };

  const prepareData = await this.helpers.httpRequest({
    url: 'https://api.uploadthing.com/v7/prepareUpload',
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-Uploadthing-Api-Key': process.ENV.UPLOADTHING_API_KEY,
      'x-uploadthing-fe-package': 'n8n-custom',
      'x-uploadthing-version': '7.7.4',
    },
    body: prepareBody,
    json: true, // Ensure JSON parse.
  });

  // Manual check (if helper doesn't throw).
  if (!prepareData || !prepareData.url) {
    throw new Error('Prepare failed: Invalid response');
  }

  result.push(prepareData)
  
  }

return result;

This is how the whole N8N looks like: