code: func (c *Client) DecodeScriptAsync(serializedScript []byte) FutureDecodeScriptResult {
  	scriptHex := hex.EncodeToString(serializedScript)
  	cmd := btcjson.NewDecodeScriptCmd(scriptHex)
  	return c.sendCmd(cmd)
  }
docs: // DecodeScriptAsync returns an instance of a type that can be used to
  // get the result of the RPC at some future time by invoking the Receive
  // function on the returned instance.
  //
  // See DecodeScript for the blocking version and more details.