class Callbacks

package fivem.server.core

The server half of the request/response bridge. See fivem.client.core.Callbacks for the shape of the protocol.

Callbacks.register("bank:getBalance", (source, args) -> {
    var player = Player.fromSource(source);
    if (player == null) return 0;
    return accounts.balanceOf(player.identifier("license"));
});

Handlers run on a coroutine, so they may block — awaiting a database query inside one is fine, and the answer is sent once it returns.

Treat a callback handler exactly like a net event handler: source is the only trustworthy argument, and everything in args came from a client that may be lying.

Static methods

staticawait(target:Int, name:String, args:Rest<Dynamic>):Dynamic

Asks a client something and waits for the answer.

Returns null on timeout — which includes the ordinary case of the player disconnecting mid-request, so always handle it.

staticawaitWithTimeout(target:Int, name:String, timeoutMs:Int, args:Rest<Dynamic>):Dynamic

As await, with an explicit timeout.

staticregister(name:String, handler:(source:Int, args:Array<Dynamic>) ‑> Dynamic):Void

Registers a handler clients can call by name. The return value is sent back as the answer.

staticrequest(target:Int, name:String, onResult:(result:Dynamic) ‑> Void, args:Rest<Dynamic>):Void

Asks a client without blocking, delivering the answer to onResult.

staticunregister(name:String):Void