HitDice hooks MR

Hooks.on("preRollHitDie", (actor, parts) => {

    let periapt = actor.items.getName(game.i18n.format("REST-RECOVERY.FeatureNames.Periapt"));
    periapt = periapt && periapt.data.data.attunement === 2;

    let durable = actor.items.getName(game.i18n.format("REST-RECOVERY.FeatureNames.Durable"));
    durable = durable && durable.data.type === "feat";

    const conMod = actor.data.data.abilities.con.mod;

    if (periapt && durable) {

        parts = [`{1${denomination}+${conMod},${Math.max(conMod,2)}}kh*2`]

    } else {

        if (periapt) {
            parts[0] = "(" + parts[0];
            parts[1] += ")*2";
        }

        if (durable) {
            parts[0] = "{" + parts[0]
            parts[1] += `,${conMod*2}}kh`
        }
    }

});