Add Sharding Support!

src/client/websocket/WebSocketManager.js

@@ -112,6 +112,9 @@ class WebSocketManager {
     this.reconnecting = false;
     const payload = this.client.options.ws;
     payload.token = this.client.token;
+    if (this.client.options.shard_count > 0) {
+      payload.shard = [this.client.options.shard_id, this.client.options.shard_count];
+    }
 
     this.send({
       op: Constants.OPCodes.IDENTIFY,

src/util/Constants.js

@@ -1,3 +1,28 @@
+/**
+ * Options that can be passed to a client:
+ * ```js
+ * {
+ *   ws: {
+ *     large_threshold: 250,
+ *     compress: true,
+ *     properties: {
+ *       $os: process ? process.platform : 'discord.js',
+ *       $browser: 'discord.js',
+ *       $device: 'discord.js',
+ *       $referrer: '',
+ *       $referring_domain: '',
+ *     },
+ *   },
+ *   protocol_version: 6,
+ *   max_message_cache: 200,
+ *   rest_ws_bridge_timeout: 5000,
+ *   api_request_method: 'sequential',
+ *   shard_id: 0,
+ *   shard_count: 0,
+ * };
+ * ```
+ * @typedef {Object} ClientOptions
+ */
 exports.DefaultOptions = {
   ws: {
     large_threshold: 250,
@@ -14,6 +39,8 @@ exports.DefaultOptions = {
   max_message_cache: 200,
   rest_ws_bridge_timeout: 5000,
   api_request_method: 'sequential',
+  shard_id: 0,
+  shard_count: 0,
 };
 
 exports.Status = {