I deployed a web application which require to send request and get response from a local ip(ie. 192.168.0.123), which is actually a payment terminal.
It seems that this violate the entire https purposes, however I have no control on the payment terminal and it's address due to 3rd parties API.
Are there any workaround to handle localhost/ local ip ith https request?
If you can install additional software on the payment terminal, then you could install another HTTP server that acts as a reverse proxy and listens on HTTPS.
You then make your requests to https://192.168.0.123 and your reverse proxy forwards them to its http://localhost.
Nginx is a popular server for this purpose.
If you can't install additional software then you should look at using an isolated network instead.
It doesn't really matter if communication over a local network isn't encrypted if you completely trust every device that is connected to it.