code: func (r FutureSendRawTransactionResult) Receive() (*chainhash.Hash, error) {
  	res, err := receiveFuture(r)
  	if err != nil {
  		return nil, err
  	}
  
  	// Unmarshal result as a string.
  	var txHashStr string
  	err = json.Unmarshal(res, &txHashStr)
  	if err != nil {
  		return nil, err
  	}
  
  	return chainhash.NewHashFromStr(txHashStr)
  }
docs: // Receive waits for the response promised by the future and returns the result
  // of submitting the encoded transaction to the server which then relays it to
  // the network.