/**
* Create a standard pay to address output for usage in {@link #createPaymentRequest} and {@link
* #createPaymentMessage}.
*
* @param amount amount to pay, or null
* @param address address to pay to
* @return output
*/
public static Protos.Output createPayToAddressOutput(@Nullable Coin amount, Address address) {
Protos.Output.Builder output = Protos.Output.newBuilder();
if (amount != null) {
final NetworkParameters params = address.getParameters();
if (params.hasMaxMoney() && amount.compareTo(params.getMaxMoney()) > 0)
throw new IllegalArgumentException("Amount too big: " + amount);
output.setAmount(amount.value);
} else {
output.setAmount(0);
}
output.setScript(ByteString.copyFrom(ScriptBuilder.createOutputScript(address).getProgram()));
return output.build();
}
/**
* Generates a Payment message based on the information in the PaymentRequest. Provide
* transactions built by the wallet. If the PaymentRequest did not specify a payment_url, returns
* null.
*
* @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 Protos.Payment getPayment(
List<Transaction> txns, @Nullable Address refundAddr, @Nullable String memo)
throws IOException {
if (!paymentDetails.hasPaymentUrl()) return null;
Protos.Payment.Builder payment = Protos.Payment.newBuilder();
if (paymentDetails.hasMerchantData()) payment.setMerchantData(paymentDetails.getMerchantData());
if (refundAddr != null) {
Protos.Output.Builder refundOutput = Protos.Output.newBuilder();
refundOutput.setAmount(totalValue.longValue());
refundOutput.setScript(
ByteString.copyFrom(ScriptBuilder.createOutputScript(refundAddr).getProgram()));
payment.addRefundTo(refundOutput);
}
if (memo != null) {
payment.setMemo(memo);
}
for (Transaction txn : txns) {
txn.verify();
ByteArrayOutputStream o = new ByteArrayOutputStream();
txn.bitcoinSerialize(o);
payment.addTransactions(ByteString.copyFrom(o.toByteArray()));
}
return payment.build();
}