code: func (c *Client) DecodeRawTransactionAsync(serializedTx []byte) FutureDecodeRawTransactionResult {
  	txHex := hex.EncodeToString(serializedTx)
  	cmd := btcjson.NewDecodeRawTransactionCmd(txHex)
  	return c.sendCmd(cmd)
  }
docs: // DecodeRawTransactionAsync 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 DecodeRawTransaction for the blocking version and more details.