public List <PreKeyBundle> getPreKeys(SignalServiceAddress destination, uint deviceIdInteger)// throws IOException
        {
            try
            {
                string deviceId = deviceIdInteger.ToString();

                if (deviceId.Equals("1"))
                {
                    deviceId = "*";
                }

                string path = string.Format(PREKEY_DEVICE_PATH, destination.getNumber(), deviceId);

                if (destination.getRelay().HasValue)
                {
                    path = path + "?relay=" + destination.getRelay().ForceGetValue();
                }

                string              responseText = makeRequest(path, "GET", null);
                PreKeyResponse      response     = JsonUtil.fromJson <PreKeyResponse>(responseText);
                List <PreKeyBundle> bundles      = new List <PreKeyBundle>();

                foreach (PreKeyResponseItem device in response.getDevices())
                {
                    ECPublicKey preKey                = null;
                    ECPublicKey signedPreKey          = null;
                    byte[]      signedPreKeySignature = null;
                    int         preKeyId              = -1;
                    int         signedPreKeyId        = -1;

                    if (device.getSignedPreKey() != null)
                    {
                        signedPreKey          = device.getSignedPreKey().getPublicKey();
                        signedPreKeyId        = (int)device.getSignedPreKey().getKeyId(); // TODO: whacky
                        signedPreKeySignature = device.getSignedPreKey().getSignature();
                    }

                    if (device.getPreKey() != null)
                    {
                        preKeyId = (int)device.getPreKey().getKeyId();// TODO: whacky
                        preKey   = device.getPreKey().getPublicKey();
                    }

                    bundles.Add(new PreKeyBundle(device.getRegistrationId(), device.getDeviceId(), (uint)preKeyId,
                                                 preKey, (uint)signedPreKeyId, signedPreKey, signedPreKeySignature,
                                                 response.getIdentityKey()));        // TODO: whacky
                }

                return(bundles);
            }

            /*catch (JsonUtil.JsonParseException e)
             * {
             *  throw new IOException(e);
             * }*/
            catch (NotFoundException nfe)
            {
                throw new UnregisteredUserException(destination.getNumber(), nfe);
            }
        }
        public PreKeyBundle getPreKey(SignalServiceAddress destination, uint deviceId)// throws IOException
        {
            try
            {
                string path = string.Format(PREKEY_DEVICE_PATH, destination.getNumber(),
                                            deviceId.ToString());

                if (destination.getRelay().HasValue)
                {
                    path = path + "?relay=" + destination.getRelay().ForceGetValue();
                }

                string         responseText = makeRequest(path, "GET", null);
                PreKeyResponse response     = JsonUtil.fromJson <PreKeyResponse>(responseText);

                if (response.getDevices() == null || response.getDevices().Count < 1)
                {
                    throw new Exception("Empty prekey list");
                }

                PreKeyResponseItem device                = response.getDevices()[0];
                ECPublicKey        preKey                = null;
                ECPublicKey        signedPreKey          = null;
                byte[]             signedPreKeySignature = null;
                int preKeyId       = -1;
                int signedPreKeyId = -1;

                if (device.getPreKey() != null)
                {
                    preKeyId = (int)device.getPreKey().getKeyId();// TODO: whacky
                    preKey   = device.getPreKey().getPublicKey();
                }

                if (device.getSignedPreKey() != null)
                {
                    signedPreKeyId        = (int)device.getSignedPreKey().getKeyId();// TODO: whacky
                    signedPreKey          = device.getSignedPreKey().getPublicKey();
                    signedPreKeySignature = device.getSignedPreKey().getSignature();
                }

                return(new PreKeyBundle(device.getRegistrationId(), device.getDeviceId(), (uint)preKeyId, preKey,
                                        (uint)signedPreKeyId, signedPreKey, signedPreKeySignature, response.getIdentityKey()));
            }

            /*catch (JsonUtil.JsonParseException e)
             * {
             *  throw new IOException(e);
             * }*/
            catch (NotFoundException nfe)
            {
                throw new UnregisteredUserException(destination.getNumber(), nfe);
            }
        }