Webhook core implementation.

src/Discord.Net.Core/Entities/Webhooks/IWebhook.cs

@@ -23,7 +23,7 @@ namespace Discord
         /// <summary> Gets the guild owning this webhook. </summary>
         IGuild Guild { get; }
         /// <summary> Gets the id of the guild owning this webhook. </summary>
-        ulong GuildId { get; }
+        ulong? GuildId { get; }
 
         /// <summary> Gets the user that created this webhook. </summary>
         IUser Creator { get; }

src/Discord.Net.Core/Entities/Webhooks/WebhookProperties.cs

@@ -23,5 +23,19 @@
         /// The default avatar of the webhook.
         /// </summary>
         public Optional<Image?> Image { get; set; }
+        /// <summary>
+        /// The channel for this webhook.
+        /// </summary>
+        /// <remarks>
+        /// This field is not used when authenticated with <see cref="TokenType.Webhook"/>.
+        /// </remarks>
+        public Optional<ITextChannel> Channel { get; set; }
+        /// <summary>
+        /// The channel id for this webhook.
+        /// </summary>
+        /// <remarks>
+        /// This field is not used when authenticated with <see cref="TokenType.Webhook"/>.
+        /// </remarks>
+        public Optional<ulong> ChannelId { get; set; }
     }
 }

src/Discord.Net.Core/IDiscordClient.cs

@@ -35,6 +35,6 @@ namespace Discord
         Task<IReadOnlyCollection<IVoiceRegion>> GetVoiceRegionsAsync(RequestOptions options = null);
         Task<IVoiceRegion> GetVoiceRegionAsync(string id, RequestOptions options = null);
 
-        Task<IWebhook> GetWebhookAsync(ulong id, string webhookToken = null, RequestOptions options = null);
+        Task<IWebhook> GetWebhookAsync(ulong id, RequestOptions options = null);
     }
 }