using Unity.NetCode;

namespace ProjectM.Simulation
{
    /// <summary>
    /// Client → server permanent meta-upgrade purchase: <see cref="UpgradeId"/> keys the baked meta catalog. The
    /// TIER is SERVER-COMPUTED (a purchase always buys owned+1) — putting a tier on the wire would invite
    /// desync/cheat. Server-validated (<c>RunInfo.Lifecycle==Staging</c> phase gate, class mask, prereq, MaxTier,
    /// Aether affordability) with DR-014 in-loop ledger atomicity so two same-tick purchases on barely-enough Aether
    /// cannot both pass. UNCONDITIONAL wire type. Declared at Step 3 (wire front-load); consumed by
    /// <c>MetaSpendSystem</c> from Step 13.
    /// </summary>
    public struct MetaSpendRequest : IRpcCommand
    {
        /// <summary>Meta-catalog upgrade id (append-only key).</summary>
        public byte UpgradeId;
    }
}