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); } }