*Add addRelay interface method

src/index.ts

@@ -35,6 +35,13 @@ export class DHT {
   async ready(): Promise<ErrTuple> {
     return callModule(DHT_MODULE, "ready");
   }
+
+  public async addRelay(pubkey: string): Promise<void> {
+    const [, err] = await callModule(DHT_MODULE, "addRelay", { pubkey });
+    if (err) {
+      throw err;
+    }
+  }
 }
 
 export class Socket extends EventEmitter {