How to use the file-box.FileBox.fromBase64 function in file-box

if (this.loginScanQrcode) {
      throw new Error('qrcode exist')
    }

    const result = await this.WXGetQRCode()
    if (!result || !result.qr_code) {
      log.verbose('PuppetPadchatManager', `emitLoginQrCode() result not found. Call WXInitialize() and try again ...`)

      await this.WXInitialize()

      // wait 1 second and try again
      await new Promise(r => setTimeout(r, 1000))
      return await this.emitLoginQrcode()
    }

    const fileBox = FileBox.fromBase64(result.qr_code, 'qrcode.jpg')
    const qrcodeDecoded = await fileBoxToQrcode(fileBox)

    this.loginScanQrcode = qrcodeDecoded
    this.loginScanStatus = WXCheckQRCodeStatus.WaitScan

    this.emit(
      'scan',
      this.loginScanQrcode,
      this.loginScanStatus,
    )
  }