Remove GenerateChallengeBlocking from FingerprintManager

        }

        }

    }

    }

    /**

     * Same as {@link #generateChallenge(GenerateChallengeCallback)}, except blocks until the

     * TEE/hardware operation is complete.

     * @return challenge generated in the TEE/hardware

     * @hide

     */

    @RequiresPermission(MANAGE_FINGERPRINT)

    public long generateChallengeBlocking() {

        final AtomicReference<Long> result = new AtomicReference<>();

        final CountDownLatch latch = new CountDownLatch(1);

        final GenerateChallengeCallback callback = new InternalGenerateChallengeCallback() {

            @Override

            public void onChallengeGenerated(long challenge) {

                result.set(challenge);

                latch.countDown();

            }

        };

        generateChallenge(callback);

        try {

            latch.await(1, TimeUnit.SECONDS);

        } catch (InterruptedException e) {

            Slog.e(TAG, "Interrupted while generatingChallenge", e);

            e.printStackTrace();

        }

        return result.get();

    }

    /**

    /**

     * Generates a unique random challenge in the TEE. A typical use case is to have it wrapped in a

     * Generates a unique random challenge in the TEE. A typical use case is to have it wrapped in a

     * HardwareAuthenticationToken, minted by Gatekeeper upon PIN/Pattern/Password verification.

     * HardwareAuthenticationToken, minted by Gatekeeper upon PIN/Pattern/Password verification.