Question about first Exstention

[BarryCarlyon]

@TheEnigmist

I’m developing a desktop app and an exstension and I’ve some question about how to link them. I’m able to login with twitch from my app using Implicit grant flow and got an access token using the extenstion client_id.

If you are authenticating a viewer you do not need to use oAuth

see requestIdShare instead - Extensions Reference | Twitch Developers

If you are needing to get a token from the broadcaster for scopes other than the subscriber read scope then you will need an oAuth flow yes, but you’d probably want the code flow not the implict flow so you can get a refreshable token.

@TheEnigmist

There is an endpoint or a PubSub or an EventSub that can I use to send data from my app to extension or am I obliged to create my own event system (like Kafka)? Example scenario: broadcaster set some data on the app, it should notify all the extension active in that moment for that broadcaster.

See send extension pubsub message - Reference | Twitch Developers

And to listen in the front end - Extensions Reference | Twitch Developers

Depending on what you might doing you might use the helper send function but I imagine most of your messaging will come from your EBS/Server.

So yes Twitch provides a messaging service but you can use your own messaging service.

You can also use the config service to store configuation data

• Extensions Reference | Twitch Developers
• Reference | Twitch Developers

@TheEnigmist

Can channel points be used to redeem something in my extension like the bit system?

Technically yes.

Please refer to the Channel Points Acceptable Use Policy to ensure you are compliant - Twitch.tv - Channel Points Acceptable Use Policy

Channel Points would require a server/backend in order to consume the chnanel points usage event.

@TheEnigmist

Right now I use redirect on localhost:PORT on my desktop app, I’m able to extract the access token and save it on disk. Is this good or for security reason is mandadory to use an external server and doing server-to-server requests to Twitch APIs?

This is generally not good practice since if a user is behind a firewall that only allows SSL traffic on the SSL point you’ll run into issues. Let along localhost to me is my computer not yours. Removed as misread your usecase

Sure you can have the streamer install software on their computer for an extension, but then that software can’t talk to the Twitch API to send extension pubsub messaging as you’d leak your Extension Secret.

And if you want to use channel points, you’ll need a server in order to consume the events via eventsub. (yeah your desktop app could connect to EventSub Websockets to consume but then you can’t talk to your extension)

So you’ll want an EBS/External Server to start with, in my opinion.