I want to give a player a status effect whenever it presses a certain key. This was my first attempt:

@SubscribeEvent
public static void pressCKey(InputEvent.KeyInputEvent event) {
    LocalPlayer localPlayer = Minecraft.getInstance().player;
    if (localPlayer != null && event.getKey() == 67 && event.getAction() == GLFW.GLFW_PRESS) {
        if (localPlayer.getActiveEffectsMap() != null) localPlayer.addEffect(new MobEffectInstance(MobEffects.MOVEMENT_SPEED, 1000));
    }
}

I quickly realized this didn't work because it was adding the effect to the client-side player (LocalPlayer), and not the server-side player. I then searched through some older forums and found out that I would need to send a packet to the server whenever a key is pressed. There was a vanilla packet called ServerboundKeyPacket, but it confused me when I saw its constructor. I am unsure if this packet is the right one to use because it apparently does not consider which player pressed the key. Should I just use a custom packet instead?

Edited May 28, 20223 yr by LeeCrafts

10 minutes ago, LeeCrafts said:

Should I just use a custom packet instead?

yes you should, you can take a look at this