@Test
  public void importKeys() {
    long now = Utils.currentTimeSeconds();
    Utils.setMockClock(now);
    final ECKey key1 = new ECKey();
    Utils.rollMockClock(86400);
    final ECKey key2 = new ECKey();
    final ArrayList<ECKey> keys = Lists.newArrayList(key1, key2);

    // Import two keys, check the event is correct.
    assertEquals(2, chain.importKeys(keys));
    assertEquals(2, chain.numKeys());
    assertTrue(onKeysAddedRan.getAndSet(false));
    assertArrayEquals(keys.toArray(), onKeysAdded.get().toArray());
    assertEquals(now, chain.getEarliestKeyCreationTime());
    // Check we ignore duplicates.
    final ECKey newKey = new ECKey();
    keys.add(newKey);
    assertEquals(1, chain.importKeys(keys));
    assertTrue(onKeysAddedRan.getAndSet(false));
    assertEquals(newKey, onKeysAdded.getAndSet(null).get(0));
    assertEquals(0, chain.importKeys(keys));
    assertFalse(onKeysAddedRan.getAndSet(false));
    assertNull(onKeysAdded.get());

    assertTrue(chain.hasKey(key1));
    assertTrue(chain.hasKey(key2));
    assertEquals(key1, chain.findKeyFromPubHash(key1.getPubKeyHash()));
    assertEquals(key2, chain.findKeyFromPubKey(key2.getPubKey()));
    assertNull(chain.findKeyFromPubKey(key2.getPubKeyHash()));
  }
 @Test
 public void watching() throws UnreadableWalletException {
   ECKey key1 = new ECKey();
   ECKey pub = ECKey.fromPublicOnly(key1.getPubKeyPoint());
   chain.importKeys(pub);
   assertEquals(1, chain.numKeys());
   List<Protos.Key> keys = chain.serializeToProtobuf();
   assertEquals(1, keys.size());
   assertTrue(keys.get(0).hasPublicKey());
   assertFalse(keys.get(0).hasSecretBytes());
   chain = BasicKeyChain.fromProtobufUnencrypted(keys);
   assertEquals(1, chain.numKeys());
   assertFalse(chain.findKeyFromPubKey(pub.getPubKey()).hasPrivKey());
 }
  @Test
  public void encryptDecrypt() {
    final ECKey key1 = new ECKey();
    chain.importKeys(key1, new ECKey());
    final String PASSWORD = "******";
    chain = chain.toEncrypted(PASSWORD);
    final KeyCrypter keyCrypter = chain.getKeyCrypter();
    assertNotNull(keyCrypter);
    assertTrue(keyCrypter instanceof KeyCrypterScrypt);

    assertTrue(chain.checkPassword(PASSWORD));
    assertFalse(chain.checkPassword("wrong"));
    ECKey key = chain.findKeyFromPubKey(key1.getPubKey());
    assertTrue(key.isEncrypted());
    assertTrue(key.isPubKeyOnly());
    assertFalse(key.isWatching());
    assertNull(key.getSecretBytes());

    try {
      // Don't allow import of an unencrypted key.
      chain.importKeys(new ECKey());
      fail();
    } catch (KeyCrypterException e) {
    }

    try {
      chain.toDecrypted(keyCrypter.deriveKey("wrong"));
      fail();
    } catch (KeyCrypterException e) {
    }
    chain = chain.toDecrypted(PASSWORD);
    key = chain.findKeyFromPubKey(key1.getPubKey());
    assertFalse(key.isEncrypted());
    assertFalse(key.isPubKeyOnly());
    assertFalse(key.isWatching());
    key.getPrivKeyBytes();
  }