ox_lib/imports/callbacks/server.lua

local ServerCallbacks = {}

local ServerCallback = {
    Register = function(name, callback)
        name = ('__cb_%s:%s'):format(GetCurrentResourceName(), name)

        RegisterServerEvent(name, function(...)
            local source = source
            callback(source, function(...)
                TriggerClientEvent(name, source, ...)
            end, ...)
        end)
    end
}

return ServerCallback