feat: Support default_thread_rate_limit_per_user in channel creation

packages/discord.js/src/managers/CategoryChannelChildManager.js

@@ -50,6 +50,8 @@ class CategoryChannelChildManager extends DataManager {
    * @property {number} [rateLimitPerUser] The rate limit per user (slowmode) for the new channel in seconds
    * @property {string} [rtcRegion] The specific region of the new channel.
    * @property {VideoQualityMode} [videoQualityMode] The camera video quality mode of the voice channel
+   * @property {number} [defaultThreadRateLimitPerUser] The initial rate limit per user (slowmode)
+   * to set on newly created threads in a channel.
    * @property {GuildForumTagData[]} [availableTags] The tags that can be used in this channel (forum only).
    * @property {DefaultReactionEmoji} [defaultReactionEmoji]
    * The emoji to show in the add reaction button on a thread in a guild forum channel.

packages/discord.js/src/managers/GuildChannelManager.js

@@ -157,6 +157,7 @@ class GuildChannelManager extends CachedManager {
     rateLimitPerUser,
     rtcRegion,
     videoQualityMode,
+    defaultThreadRateLimitPerUser,
     availableTags,
     defaultReactionEmoji,
     defaultAutoArchiveDuration,
@@ -181,6 +182,7 @@ class GuildChannelManager extends CachedManager {
         rate_limit_per_user: rateLimitPerUser,
         rtc_region: rtcRegion,
         video_quality_mode: videoQualityMode,
+        default_thread_rate_limit_per_user: defaultThreadRateLimitPerUser,
         available_tags: availableTags?.map(availableTag => transformGuildForumTag(availableTag)),
         default_reaction_emoji: defaultReactionEmoji && transformGuildDefaultReaction(defaultReactionEmoji),
         default_auto_archive_duration: defaultAutoArchiveDuration,

packages/discord.js/src/structures/BaseGuildTextChannel.js

@@ -74,6 +74,16 @@ class BaseGuildTextChannel extends GuildChannel {
       this.defaultAutoArchiveDuration = data.default_auto_archive_duration;
     }
 
+    if ('default_thread_rate_limit_per_user' in data) {
+      /**
+       * The initial rate limit per user (slowmode) to set on newly created threads in a channel.
+       * @type {?number}
+       */
+      this.defaultThreadRateLimitPerUser = data.default_thread_rate_limit_per_user;
+    } else {
+      this.defaultThreadRateLimitPerUser ??= null;
+    }
+
     if ('messages' in data) {
       for (const message of data.messages) this.messages._add(message);
     }

packages/discord.js/typings/index.d.ts

@@ -636,6 +636,7 @@ export class BaseGuildEmoji extends Emoji {
 export class BaseGuildTextChannel extends TextBasedChannelMixin(GuildChannel, true) {
   protected constructor(guild: Guild, data?: RawGuildChannelData, client?: Client<true>, immediatePatch?: boolean);
   public defaultAutoArchiveDuration?: ThreadAutoArchiveDuration;
+  public defaultThreadRateLimitPerUser: number | null;
   public rateLimitPerUser: number | null;
   public nsfw: boolean;
   public threads: GuildTextThreadManager<AllowedThreadTypeForTextChannel | AllowedThreadTypeForNewsChannel>;
@@ -4823,6 +4824,7 @@ export interface CategoryCreateChannelOptions {
   position?: number;
   rtcRegion?: string;
   videoQualityMode?: VideoQualityMode;
+  defaultThreadRateLimitPerUser?: number;
   availableTags?: GuildForumTagData[];
   defaultReactionEmoji?: DefaultReactionEmoji;
   defaultAutoArchiveDuration?: ThreadAutoArchiveDuration;