fix: friend invite

src/client/Client.js

@@ -523,7 +523,7 @@ class Client extends BaseClient {
    */
 
   /**
-   * Join this Guild using this invite
+   * Join this Guild / GroupDMChannel using this invite
    * @param {InviteResolvable} invite Invite code or URL
    * @param {AcceptInviteOptions} [options={ bypassOnboarding: true, bypassVerify: true }] Options
    * @returns {Promise<Guild|DMChannel|GroupDMChannel>}
@@ -614,7 +614,7 @@ class Client extends BaseClient {
       }
       return guild;
     } else {
-      return this.channels.cache.has(i.channelId);
+      return this.channels.cache.has(i.channelId || data.channel?.id);
     }
   }
 

src/structures/Invite.js

@@ -193,16 +193,16 @@ class Invite extends Base {
     if ('channel_id' in data) {
       /**
        * The channel's id this invite is for
-       * @type {Snowflake}
+       * @type {?Snowflake}
        */
       this.channelId = data.channel_id;
       this.channel = this.client.channels.cache.get(data.channel_id);
     }
 
-    if ('channel' in data) {
+    if ('channel' in data && data.channel !== null) {
       /**
        * The channel this invite is for
-       * @type {Channel}
+       * @type {?Channel}
        */
       this.channel ??= this.client.channels._add(data.channel, this.guild, { cache: false });
       this.channelId ??= data.channel.id;

typings/index.d.ts

@@ -1728,8 +1728,8 @@ export class InteractionWebhook extends PartialWebhookMixin() {
 
 export class Invite extends Base {
   private constructor(client: Client, data: RawInviteData);
-  public channel: NonThreadGuildBasedChannel | GroupDMChannel;
-  public channelId: Snowflake;
+  public channel?: NonThreadGuildBasedChannel | GroupDMChannel;
+  public channelId?: Snowflake;
   public code: string;
   public readonly deletable: boolean;
   public readonly createdAt: Date | null;