APITextBasedChannel

last_message_id?: Snowflake | null;

The id of the last message sent in this channel (may not point to an existing or valid message)

last_pin_timestamp?: string | null;

When the last pinned message was pinned. This may be `null` in events such as `GUILD_CREATE` when a message is not pinned

rate_limit_per_user?: number;

Amount of seconds a user has to wait before sending another message (0-21600); bots, as well as users with the permission `MANAGE_MESSAGES` or `MANAGE_CHANNELS`, are unaffected `rate_limit_per_user` also applies to thread creation. Users can send one message and create one thread during each `rate_limit_per_user` interval. For thread channels, `rate_limit_per_user` is only returned if the field is set to a non-zero and non-null value. The absence of this field in API calls and Gateway events should indicate that slowmode has been reset to the default value.