VariableAuthentication3

    pub const VariableAuthentication3 = extern struct {
        version: u8 = 1,
        type: Type,
        metadata_size: u32,
        flags: Flags,

        pub fn payloadConst(self: *const VariableAuthentication3) []const u8 {
            return @constCast(self).payload();
        }

        pub fn payload(self: *VariableAuthentication3) []u8 {
            var ptr: [*]u8 = @ptrCast(self);
            return ptr[@sizeOf(VariableAuthentication3)..self.metadata_size];
        }

        pub const Flags = packed struct(u32) {
            update_cert: bool = false,
            _pad: u31 = 0,
        };

        pub const Type = enum(u8) {
            timestamp = 1,
            nonce = 2,
            _,
        };
    }