Rarity::Epic
    );
    assert_eq!(
      Sat(50 * COIN_VALUE * u64::from(SUBSIDY_HALVING_INTERVAL) + 1).rarity(),
      Rarity::Common
    );

    assert_eq!(Sat(2067187500000000 - 1).rarity(), Rarity::Common);
    assert_eq!(Sat(2067187500000000).rarity(), Rarity::Legendary);
    assert_eq!(Sat(2067187500000000 + 1).rarity(), Rarity::Common);
  }

  #[test]
  fn from_str_and_deserialize_ok() {
    #[track_caller]
    fn case(s: &str, expected: Rarity) {
      let actual = s.parse::<Rarity>().unwrap();
      assert_eq!(actual, expected);
      let round_trip = actual.to_string().parse::<Rarity>().unwrap();
      assert_eq!(round_trip, expected);
      let serialized = serde_json::to_string(&expected).unwrap();
      assert!(serde_json::from_str::<Rarity>(&serialized).is_ok());
    }

    case("common", Rarity::Common);
    case("uncommon", Rarity::Uncommon);
    case("rare", Rarity::Rare);
    case("epic", Rarity::Epic);
    case("legendary", Rarity::Legendary);
    case("mythic", Rarity::Mythic);
  }