New sticker creator button

ts/textsecure/SocketManager.ts

@@ -34,6 +34,7 @@ const JITTER = 5 * durations.SECOND;
 
 export type SocketManagerOptions = Readonly<{
   url: string;
+  artCreatorUrl: string;
   certificateAuthority: string;
   version: string;
   proxyUrl?: string;
@@ -276,6 +277,27 @@ export class SocketManager extends EventListener {
     }).getResult();
   }
 
+  // Creates new WebSocket for Art Creator provisioning
+  public async connectExternalSocket({
+    url,
+    extraHeaders,
+  }: {
+    url: string;
+    extraHeaders?: Record<string, string>;
+  }): Promise<WebSocket> {
+    return connectWebSocket({
+      name: 'art-creator-provisioning',
+      url,
+      version: this.options.version,
+      proxyAgent: this.proxyAgent,
+      extraHeaders,
+
+      createResource(socket: WebSocket): WebSocket {
+        return socket;
+      },
+    }).getResult();
+  }
+
   // Fetch-compatible wrapper around underlying unauthenticated/authenticated
   // websocket resources. This wrapper supports only limited number of features
   // of node-fetch despite being API compatible.