Is it possible to make a peer become host ?

Hi. The idea is to prevent a game to be ended when the host leaves. Then a random peer becomes host, so the game can continue.

Is it possible ?

I don't think so, once the host leaves, everyone is kicked.

You could prevent this by making sure the host isn't a player and so never leaves.

Or you could disguise that it happened by setting a peer as host and autorejoining a new game kinda like this user's response :

Thank you.

How can you make 100% sure you'll be the host on a multiplayer application ?

Join an empty room.

Thank you !

While technically it is possible as described above, it makes more sense to me to design a system around a dedicated host "server" that doesn't participate in the game if you need persistence when people connect and disconnect rather than try to create a system that can migrate hosts - you will run into a lot of frustrating design walls if you work that way.

The biggest one is upon a sudden host disconnect, even if you managed to get everyone to rejoin, much of the data that the host was responsible for will not be recoverable, and it will be far from a seamless transition. If you can create a system where the host manually hands off the host role, the transition will be much more controlled and easier to work with.