lazy_static vs once_cell

use ed25519_dalek::PublicKey;
use lazy_static::lazy_static;
use std::collections::HashMap;
use std::env;

lazy_static! {
    static ref PUB_KEY: PublicKey = PublicKey::from_bytes(
        &hex::decode(
            env::var("DISCORD_PUBLIC_KEY")
                .expect("Expected DISCORD_PUBLIC_KEY to be set in the environment")
        )
        .expect("Couldn't hex::decode the DISCORD_PUBLIC_KEY")
    )
    .expect("Couldn't create a PublicKey from DISCORD_PUBLIC_KEY bytes");
    static ref DISCORD_BOT_TOKEN: String =
        env::var("DISCORD_BOT_TOKEN").expect("Expected a DISCORD_BOT_TOKEN");
    static ref ROLE_REVERSE_MAP: HashMap<&'static str, &'static str> = {
        let mut map = HashMap::new();
        map.insert("837304749312180285", "corgi");
        map
    };
}

fn main() {
    println!(
        "User asked for \"{}\" role.",
        ROLE_REVERSE_MAP.get("837304749312180285").unwrap()
    );
}