ImagePicker - image to blob

import * as ImagePicker from ‘expo-image-picker’;
let result = await ImagePicker.launchImageLibraryAsync({
mediaTypes: ImagePicker.MediaTypeOptions.Images,
base64: true,
quality: 0

How can I change this to blob format to send it to an api?
here is what I tried

const response = await fetch(result.uri);
const blob = await response.blob();
return console.log(JSON.stringify(blob));


I am unsure what to do next, thank you in advance!