private synchronized void deleteChannelFromWallet() {
   log.info("Close tx has confirmed, deleting channel from wallet: {}", storedChannel);
   StoredPaymentChannelClientStates channels =
       (StoredPaymentChannelClientStates)
           wallet.getExtensions().get(StoredPaymentChannelClientStates.EXTENSION_ID);
   channels.removeChannel(storedChannel);
   wallet.addOrUpdateExtension(channels);
   storedChannel = null;
 }