Button in multiplayer - Ownership & RPCs

[Travis.D]

In a multiplayer game, if I have a button/lever in my level that perhaps opens a door, what’s the best way to get that to work since RPCs require an Owner (which a button derived from AActor would not have)? Would you SetOwner on the button to the player who pushed it, and then…? I’m struggling to understand the best approach.

An important concept to understand when working on multiplayer, and especially with replicated events, is which connection is considered to be the owner of a particular actor or component . For our purposes, know that “Run on server” events can only be invoked from actors (or their components) which the client owns. Usually, this means you can only send “Run on server” events from the following actors, or from a component of one of the actors:

• The client’s PlayerController itself,
• A Pawn that the client’s PlayerController possesses, or
• The client’s PlayerState.

(Networking Overview for Unreal Engine | Unreal Engine 5.3 Documentation)

Something like a trigger volume works okay since in that case you .AddDynamic() to the OnBeginOverlap event and have it broadcast a dynamic multicast delegate, however I’m not sure how a simple button would work where you write your own OnPlayerInput kind of code.

Thanks for your time

[Lyonar]

The RPCs are based on behaviors. Clicking a button doesn’t need RPC but opening a door does. I clicked a button and my controlled pawn try to open a door. Then it call a RPC of my pawn to open the door in server.