Running the same logic and the same technology in the server and the client was mandatory for realtime multiplayer games since the 1990s. See this article from

Running the same logic and the same technology in the server and the client was mandatory for realtime multiplayer games since the 1990s. See this article from Valve [1] for a briew overview of how client side prediction works. You should also have the server process the data to avoid cheating by modificating the client app. [1] https://developer.valvesoftware.com/wiki/Latency_Compensating_Methods_in_Client/Server_In-game_Protocol_Design_and_Optimization https://developer.valvesoftware.com/wiki/Latency_Compensatin...