I think the scope is massive, multiplayer logic can differ quite a bit depending on what needs to happen.
I've been using this project lately and I can recommend stealing from them. https://github.com/johanhelsing/matchbox
Even then, you'd cover only some very specific use-cases of multiplayer game-making.
Thanks for linking matchbox - I've been looking into https://github.com/geckosio/geckos.io as a way to integrate WebRTC into Hathora
I think the scope is massive, multiplayer logic can differ quite a bit depending on what needs to happen.
I've been using this project lately and I can recommend stealing from them. https://github.com/johanhelsing/matchbox
Even then, you'd cover only some very specific use-cases of multiplayer game-making.