/**
* Generates a Payment message and sends the payment to the merchant who sent the PaymentRequest.
* Provide transactions built by the wallet. NOTE: This does not broadcast the transactions to the
* bitcoin network, it merely sends a Payment message to the merchant confirming the payment.
* Returns an object wrapping PaymentACK once received. If the PaymentRequest did not specify a
* payment_url, returns null and does nothing.
*
* @param txns list of transactions to be included with the Payment message.
* @param refundAddr will be used by the merchant to send money back if there was a problem.
* @param memo is a message to include in the payment message sent to the merchant.
*/
public @Nullable ListenableFuture<Ack> sendPayment(
List<Transaction> txns, @Nullable Address refundAddr, @Nullable String memo)
throws PaymentRequestException, VerificationException, IOException {
Protos.Payment payment = getPayment(txns, refundAddr, memo);
if (payment == null) return null;
if (isExpired()) throw new PaymentRequestException.Expired("PaymentRequest is expired");
URL url;
try {
url = new URL(paymentDetails.getPaymentUrl());
} catch (MalformedURLException e) {
throw new PaymentRequestException.InvalidPaymentURL(e);
}
return sendPayment(url, payment);
}
/**
* Returns the payment url where the Payment message should be sent. Returns null if no payment
* url was provided in the PaymentRequest.
*/
public @Nullable String getPaymentUrl() {
if (paymentDetails.hasPaymentUrl()) return paymentDetails.getPaymentUrl();
return null;
}