TS code to interact with Astria API

astria.ts

import { FormData } from 'formdata-node';
import fetch from 'node-fetch-commonjs';

// set to `false` to use production mode
const USE_FREE_TIER = true;

const ASTRIA_API_KEY = '';

const train = () => {
  const formData = new FormData();
    formData.append('tune[title]', '<title here>');
    formData.append('tune[name]', '<name here>');

    if (USE_FREE_TIER) {
      formData.append('tune[branch]', 'fast');
    }

    formData.append(
      'tune[callback]',
      `https://api.yourdomain.com/train/complete/for/${id}`
    );
    const images = [
      'https://thispersondoesnotexist.com/image',
      'https://thispersondoesnotexist.com/image'
      // add images here ...
    ]

    for (let i = 0; i < images.length; i++) {
      const image = images[i];
      const response = await fetch(image);

      if (!response.ok) {
        throw new Error(`Unable to download image: ${image}`);
      }

      const blob = await response.blob();

      formData.append('tune[images][]', blob);
    }

    const response = await fetch('https://www.astria.ai/tunes', {
      method: 'POST',
      body: formData,
      headers: {
        Authorization: 'Bearer ' + ASTRIA_API_KEY,
        contentType: 'multipart/form-data',
      },
    });

    if (response.status >= 400 && response.status < 600) {
      throw new Error(
        'Failed to create tune. Received status code: ' + response.status
      );
    }

    const tune = (await response.json()) as { id: string; status: number };

    // do something with the tune
}