/**
* Closes the connection by generating a settle message for the client and calls {@link
* ServerConnection#destroyConnection(CloseReason)}. Note that this does not broadcast the payment
* transaction and the client may still resume the same channel if they reconnect
*
* <p>
*
* <p>Note that {@link PaymentChannelServer#connectionClosed()} must still be called after the
* connection fully closes.
*/
public void close() {
lock.lock();
try {
if (connectionOpen && !channelSettling) {
final Protos.TwoWayChannelMessage.Builder msg = Protos.TwoWayChannelMessage.newBuilder();
msg.setType(Protos.TwoWayChannelMessage.MessageType.CLOSE);
conn.sendToClient(msg.build());
conn.destroyConnection(CloseReason.SERVER_REQUESTED_CLOSE);
}
} finally {
lock.unlock();
}
}
@GuardedBy("lock")
private void receiveUpdatePaymentMessage(Protos.UpdatePayment msg, boolean sendAck)
throws VerificationException, ValueOutOfRangeException, InsufficientMoneyException {
log.info("Got a payment update");
Coin lastBestPayment = state.getBestValueToMe();
final Coin refundSize = Coin.valueOf(msg.getClientChangeValue());
boolean stillUsable = state.incrementPayment(refundSize, msg.getSignature().toByteArray());
Coin bestPaymentChange = state.getBestValueToMe().subtract(lastBestPayment);
ListenableFuture<ByteString> ackInfoFuture = null;
if (bestPaymentChange.signum() > 0) {
ByteString info = (msg.hasInfo()) ? msg.getInfo() : null;
ackInfoFuture = conn.paymentIncrease(bestPaymentChange, state.getBestValueToMe(), info);
}
if (sendAck) {
final Protos.TwoWayChannelMessage.Builder ack = Protos.TwoWayChannelMessage.newBuilder();
ack.setType(Protos.TwoWayChannelMessage.MessageType.PAYMENT_ACK);
if (ackInfoFuture == null) {
conn.sendToClient(ack.build());
} else {
Futures.addCallback(
ackInfoFuture,
new FutureCallback<ByteString>() {
@Override
public void onSuccess(@Nullable ByteString result) {
if (result != null) ack.setPaymentAck(ack.getPaymentAckBuilder().setInfo(result));
conn.sendToClient(ack.build());
}
@Override
public void onFailure(Throwable t) {
log.info("Failed retrieving paymentIncrease info future");
error(
"Failed processing payment update",
Protos.Error.ErrorCode.OTHER,
CloseReason.UPDATE_PAYMENT_FAILED);
}
});
}
}
if (!stillUsable) {
log.info("Channel is now fully exhausted, closing/initiating settlement");
settlePayment(CloseReason.CHANNEL_EXHAUSTED);
}
}