function GeneratePlate()
    local generatedPlate
    local doBreak = false

    while true do
        Citizen.Wait(2)
        math.randomseed(GetGameTimer())
        if Config.PlateUseSpace then
            generatedPlate = string.upper(GetRandomLetter(Config.PlateLetters) .. ' ' .. GetRandomNumber(Config.PlateNumbers))
        else
            generatedPlate = string.upper(GetRandomLetter(Config.PlateLetters) .. GetRandomNumber(Config.PlateNumbers))
        end

        ESX.TriggerServerCallback('esx_vehicleshop:isPlateTaken', function (isPlateTaken)
            if not isPlateTaken then
                doBreak = true
            end
        end, generatedPlate)

        if doBreak then
            break
        end
    end

    return generatedPlate
end

-- mixing async with sync tasks
function IsPlateTaken(plate)
    local callback = 'waiting'

    ESX.TriggerServerCallback('esx_vehicleshop:isPlateTaken', function(isPlateTaken)
        callback = isPlateTaken
    end, plate)

    while type(callback) == 'string' do
        Citizen.Wait(0)
    end

    return callback
end

function GetRandomNumber(length)
    Citizen.Wait(1)
    math.randomseed(GetGameTimer())
    if length > 0 then
        return GetRandomNumber(length - 1) .. NumberCharset[math.random(1, #NumberCharset)]
    else
        return ''
    end
end

function GetRandomLetter(length)
    Citizen.Wait(1)
    math.randomseed(GetGameTimer())
    if length > 0 then
        return GetRandomLetter(length - 1) .. Charset[math.random(1, #Charset)]
    else
        return ''
    end
end