How to clone a voice in elevenlabs using nodeJS

CloneVoice.ts

import FormData from 'form-data';
import axios from 'axios';
import fs from 'fs';


interface ICloneVoiceParams  { 
  description:string;
  name:string;
  fileUrls: string[];
  labels: Record<string,string>;
}

 const handleStreamEnd = (stream: fs.ReadStream): Promise<void> => {
  return new Promise(resolve => {
    if (!stream || stream?.closed) {
      resolve();
      return;
    }

    stream.once('end', () => {
      resolve();
    });
    stream.once('close', () => {
      resolve();
    });
  });
};



const cloneVoiceHandler = async (params:ICloneVoiceParams): Promise<string> => {
  const { name, description, fileUrls=[], labels={} } = params;
  const formData = new FormData(); 
  const streams: fs.ReadStream[] = [];

  for (let i = 0; i < fileUrls.length; i++) {
      try {
        const fileUrl = fileUrls[i];
        const mp3Response = await axios.get(fileUrl, {
          responseType: 'stream',
        });

        streams.push(mp3Response.data);  // make sure to clear the streams

        formData.append('files', mp3Response.data, {
          contentType: 'audio/mpeg',
        });
      } catch (err) {
        // log error
      }
  }

                                       
  formData.append('name', name);
  formData.append('description', description);

  if (typeof labels === 'object' && labels) {
    formData.append('labels', JSON.stringify(labels));
  }
    
  const elevenlabsUrl = '';
  const elevenLabsApiKey ='';
  const elevenLabsResponse = await axios
    .post(elevenlabsUrl, formData, {
      headers: {
        ...formData.getHeaders(),
        Accept: 'application/json',
        'xi-api-key': elevenLabsApiKey,
        'Access-Control-Allow-Origin': '*',
      },
      validateStatus: function (status) {
        return status >= 200 && status <= 500;
      },
    });
  const voiceId = elevenLabsResponseData?.voice_id || '';
                                             
  for (let i = 0; i < streams.length; i++) {
    const stream = streams[i];
    await handleStreamEnd(stream);
  }

  for (let i = 0; i < streams.length; i++) {
    const stream = streams[i];

    if (stream) {
      stream.destroy();
    }
  }

  return voiceId;
}