How to properly send an image when paying in a Telegram bot?

Question

API

Hello, there is a task to receive a photo from the user (sent via the telegram client) and in the sendInvoice method, specify the photo that the user sent as the photo_url parameter .

But there is 1 problem, photos that users send to TG have content-type: application/octet-stream (available at https://api.telegram.org/file/bot ACCESS_TOKEN /photos/file_1.jpg), and for the method sendInvoice needs content-type: image/jpeg .

Tell me how best to get out of this situation? I understand that you can save a photo and upload it to your server, which will already give out the correct content-type, but this is a little expensive, maybe there are some other ways?