n check_runecoin(block: u64, is_runecoin_holder: bool) {
    if block != 888_888 {
        return;
    }

    match is_runecoin_holder {
        true => println!("You get rewarded! 🎉"),
        false => println!("Face-melting time! You are not a Runecoin holder! 😱"),
    }
}