Let InteractionOriginalResponseUpdater implement Deletable.

 - Update the documentation to specify that audit log reason support depends on discord.

javacord-api/src/main/java/org/javacord/api/entity/Deletable.java

@@ -8,6 +8,9 @@
 
 /**
  * An entity that can be deleted.
+ *
+ * <p>Note that not all entities implementing this might actually support giving an audit reason. If this is the case,
+ * the audit reason will silently be dropped - or rather sent to and ignored by discords side.</p>
  */
 public interface Deletable {
 
@@ -30,7 +33,7 @@ default CompletableFuture<Void> delete() {
     /**
      * Deletes the entity.
      *
-     * @param reason The audit log reason for the deletion.
+     * @param reason The audit log reason for the deletion, if supported.
      * @return A future to tell if the deletion was successful.
      */
     CompletableFuture<Void> delete(String reason);
@@ -55,7 +58,7 @@ default CompletableFuture<Void> deleteAfter(long duration, TimeUnit unit) {
      *
      * @param duration The duration.
      * @param unit The unit for the duration.
-     * @param auditLogReason The reason to log for the audit log.
+     * @param auditLogReason The reason to log for the audit log, if supported.
      * @return A future that completes when the entity has been deleted.
      */
     default CompletableFuture<Void> deleteAfter(long duration, TimeUnit unit, String auditLogReason) {
@@ -80,7 +83,7 @@ default CompletableFuture<Void> deleteAfter(Duration duration) {
      * <p><b>Caution:</b> If the bot shuts down before the scheduled time, the entity will not be deleted.</p>
      *
      * @param duration The duration.
-     * @param auditLogReason The reason to log for the audit log.
+     * @param auditLogReason The reason to log for the audit log, if supported.
      * @return A future that completes when the entity has been deleted.
      */
     default CompletableFuture<Void> deleteAfter(Duration duration, String auditLogReason) {

javacord-api/src/main/java/org/javacord/api/entity/message/internal/InteractionMessageBuilderDelegate.java

@@ -3,6 +3,7 @@
 import org.javacord.api.entity.message.Message;
 import org.javacord.api.entity.message.MessageFlag;
 import org.javacord.api.interaction.InteractionBase;
+
 import java.util.EnumSet;
 import java.util.concurrent.CompletableFuture;
 
@@ -31,6 +32,15 @@ public interface InteractionMessageBuilderDelegate extends MessageBuilderBaseDel
      */
     CompletableFuture<Void> deleteInitialResponse(InteractionBase interaction);
 
+    /**
+     * Delete the original response message.
+     *
+     * @param interaction The interaction.
+     * @param auditLogMessage The audit log message to attach.
+     * @return The completable future when the message has been deleted.
+     */
+    CompletableFuture<Void> deleteInitialResponse(InteractionBase interaction, String auditLogMessage);
+
     /**
      * Edits the message.
      *

javacord-api/src/main/java/org/javacord/api/interaction/callback/InteractionOriginalResponseUpdater.java

@@ -1,11 +1,12 @@
 package org.javacord.api.interaction.callback;
 
+import org.javacord.api.entity.Deletable;
 import org.javacord.api.entity.message.Message;
 
 import java.util.concurrent.CompletableFuture;
 
 public interface InteractionOriginalResponseUpdater
-        extends ExtendedInteractionMessageBuilderBase<InteractionOriginalResponseUpdater> {
+        extends ExtendedInteractionMessageBuilderBase<InteractionOriginalResponseUpdater>, Deletable {
     /**
      * Updates your initial response to the interaction.
      * Note: You can not update the message using any of the edit methods on the message entity as

javacord-core/src/main/java/org/javacord/core/entity/message/InteractionMessageBuilderDelegateImpl.java

@@ -14,6 +14,7 @@
 import org.javacord.core.util.rest.RestEndpoint;
 import org.javacord.core.util.rest.RestMethod;
 import org.javacord.core.util.rest.RestRequest;
+
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
@@ -59,6 +60,17 @@ public CompletableFuture<Void> deleteInitialResponse(InteractionBase interaction
                 .execute(result -> null);
     }
 
+    @Override
+    public CompletableFuture<Void> deleteInitialResponse(InteractionBase interaction, String reason) {
+        return new RestRequest<Void>(interaction.getApi(),
+                RestMethod.DELETE, RestEndpoint.ORIGINAL_INTERACTION_RESPONSE)
+                .setUrlParameters(Long.toUnsignedString(interaction.getApplicationId()), interaction.getToken())
+                .setAuditLogReason(reason)
+                .consumeGlobalRatelimit(false)
+                .includeAuthorizationHeader(false)
+                .execute(result -> null);
+    }
+
     @Override
     public CompletableFuture<Message> editOriginalResponse(InteractionBase interaction) {
         RestRequest<Message> request = new RestRequest<Message>(interaction.getApi(),

javacord-core/src/main/java/org/javacord/core/interaction/InteractionOriginalResponseUpdaterImpl.java

@@ -1,5 +1,6 @@
 package org.javacord.core.interaction;
 
+import org.javacord.api.DiscordApi;
 import org.javacord.api.entity.Icon;
 import org.javacord.api.entity.Mentionable;
 import org.javacord.api.entity.message.Message;
@@ -11,6 +12,7 @@
 import org.javacord.api.entity.message.mention.AllowedMentions;
 import org.javacord.api.interaction.InteractionBase;
 import org.javacord.api.interaction.callback.InteractionOriginalResponseUpdater;
+
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.InputStream;
@@ -52,11 +54,21 @@ public CompletableFuture<Message> update() {
         return this.delegate.editOriginalResponse(interaction);
     }
 
+    @Override
+    public DiscordApi getApi() {
+        return this.interaction.getApi();
+    }
+
     @Override
     public CompletableFuture<Void> delete() {
         return this.delegate.deleteInitialResponse(interaction);
     }
 
+    @Override
+    public CompletableFuture<Void> delete(String reason) {
+        return this.delegate.deleteInitialResponse(interaction, reason);
+    }
+
     @Override
     public InteractionOriginalResponseUpdater appendCode(String language, String code) {
         delegate.appendCode(language, code);