Method callback

app/configs/socket.js:72–77

(res)

    }
    return new Promise((resolve) => {
      const callback = (res) => {
        if (this.uid === res.uid && res.timestamp === data.timestamp) {
          this.socket.off('dispatch', callback);
          resolve();
        }
      };
      this.socket.on('dispatch', callback);
    });
  };