private void parsePaymentRequest(Protos.PaymentRequest request) throws PaymentProtocolException {
try {
if (request == null) throw new PaymentProtocolException("request cannot be null");
if (request.getPaymentDetailsVersion() != 1)
throw new PaymentProtocolException.InvalidVersion(
"Version 1 required. Received version " + request.getPaymentDetailsVersion());
paymentRequest = request;
if (!request.hasSerializedPaymentDetails())
throw new PaymentProtocolException("No PaymentDetails");
paymentDetails =
Protos.PaymentDetails.newBuilder()
.mergeFrom(request.getSerializedPaymentDetails())
.build();
if (paymentDetails == null) throw new PaymentProtocolException("Invalid PaymentDetails");
if (!paymentDetails.hasNetwork()) params = MainNetParams.get();
else params = NetworkParameters.fromPmtProtocolID(paymentDetails.getNetwork());
if (params == null)
throw new PaymentProtocolException.InvalidNetwork(
"Invalid network " + paymentDetails.getNetwork());
if (paymentDetails.getOutputsCount() < 1)
throw new PaymentProtocolException.InvalidOutputs("No outputs");
for (Protos.Output output : paymentDetails.getOutputsList()) {
if (output.hasAmount()) totalValue = totalValue.add(Coin.valueOf(output.getAmount()));
}
// This won't ever happen in practice. It would only happen if the user provided outputs
// that are obviously invalid. Still, we don't want to silently overflow.
if (params.hasMaxMoney() && totalValue.compareTo(params.getMaxMoney()) > 0)
throw new PaymentProtocolException.InvalidOutputs("The outputs are way too big.");
} catch (InvalidProtocolBufferException e) {
throw new PaymentProtocolException(e);
}
}
/**
* 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.
*/
@Nullable
public Protos.Payment getPayment(
List<Transaction> txns, @Nullable Address refundAddr, @Nullable String memo)
throws IOException, PaymentProtocolException.InvalidNetwork {
if (paymentDetails.hasPaymentUrl()) {
for (Transaction tx : txns)
if (!tx.getParams().equals(params))
throw new PaymentProtocolException.InvalidNetwork(params.getPaymentProtocolId());
return PaymentProtocol.createPaymentMessage(
txns, totalValue, refundAddr, memo, getMerchantData());
} else {
return null;
}
}