private void writeKeys(@Nonnull final OutputStream os) throws IOException {
final List<ECKey> keys = new LinkedList<ECKey>();
for (final ECKey key : wallet.getKeys()) if (!wallet.isKeyRotating(key)) keys.add(key);
final Writer out = new OutputStreamWriter(os, Constants.UTF_8);
WalletUtils.writeKeys(out, keys);
out.close();
}
private static Wallet readKeys(@Nonnull final InputStream is) throws IOException {
final BufferedReader in = new BufferedReader(new InputStreamReader(is, Constants.UTF_8));
final List<ECKey> keys = WalletUtils.readKeys(in);
in.close();
final Wallet wallet = new Wallet(Constants.NETWORK_PARAMETERS);
for (final ECKey key : keys) wallet.addKey(key);
return wallet;
}