@RequestMapping("/testnet/**")
@Controller
public class TestnetController {
    private NetworkParameters params;
    private WalletAppKit kit;

    public TestnetController() {
        params = TestNet3Params.get();

        kit = new WalletAppKit(params, new File("."), "_") {
            @Override
            protected void onSetupCompleted() {
                if (wallet().getKeychainSize() < 1)
                    wallet().addKey(new ECKey());
            }
        };

        kit.startAndWait();
    }

    @RequestMapping(value = "/wallet/{addressVariable}", method = RequestMethod.GET)
    @ResponseBody
    public String walletWatcher(@PathVariable String addressVariable) throws AddressFormatException {
        Address address = new Address(params, addressVariable);

        kit.wallet().addWatchedAddress(address);

        return kit.wallet().toString();
    }
}