push not working

const res=device.push(org, dst, 0o644);
console.log(res);
not work:
PushTransfer {
  _events: [Object: null prototype] {
    cancel: [Function (anonymous)],
    end: [Function (anonymous)]
  },
  _eventsCount: 2,
  _maxListeners: undefined,
  _stack: [],
  stats: { bytesTransferred: 0 },
  [Symbol(shapeMode)]: false,
  [Symbol(kCapture)]: false
}

pull is ok.