Import/Export wallet problem

[MrKwiatkowsky]

Hello guys,

I've got a little problem. I wrote import and export for bitcoinj 0.11 a lot time ago, but app has been updated to 0.12 and two days ago I was trying to use import and export and... fail. Export looks good, but when I'm trying to import, there are errors. Can someone give an advice or solution? I can add, that Crypto.class works well in 100%.

EXPORT:

Writer out;

try

{

ByteArrayOutputStream byteOutput = new ByteArrayOutputStream();

new WalletProtobufSerializer().writeWallet(wallet, byteOutput);

byteOutput.close();

byte[] plain = byteOutput.toByteArray();

String encrypted = Crypto.encrypt(plain);

out = new OutputStreamWriter(new FileOutputStream(backupFile), "UTF-8");

out.write(encrypted);

out.flush();

}

catch (IOException e)

{

e.printStackTrace();

}

IMPORT

BufferedReader buffreader;

FileInputStream fIn;

try

{

StringBuffer datax = new StringBuffer("");

fIn = new FileInputStream(backupFile);

InputStreamReader isr = new InputStreamReader(fIn);

buffreader = new BufferedReader(isr);    

String readString = buffreader.readLine();

while (readString != null)

{

datax.append(readString);

readString = buffreader.readLine();

}

byte[] decrypted = Crypto.decrypt(text.toString());

if (decrypted == null)

return;

else

{

InputStream inputStream = new ByteArrayInputStream(decrypted);

Wallet wallet = new WalletProtobufSerializer().readWallet(inputStream);  //ERROR IN THIS LINE

inputStream.close();
                //etc.

}

}

catch (FileNotFoundException e)

{

e.printStackTrace();

}

catch (UnreadableWalletException e)

{

e.printStackTrace();

}

catch (IOException e)

{

e.printStackTrace();

}

LogCat

01-12 11:57:39.727: W/System.err(20751): org.bitcoinj.store.UnreadableWalletException: Could not parse input stream to protobuf

01-12 11:57:39.727: W/System.err(20751):  at org.bitcoinj.store.WalletProtobufSerializer.readWallet(WalletProtobufSerializer.java:391)

...

01-12 11:57:39.727: W/System.err(20751): Caused by: com.google.protobuf.InvalidProtocolBufferException: Protocol message contained an invalid tag (zero).

01-12 11:57:39.732: W/System.err(20751):  at com.google.protobuf.CodedInputStream.readTag(CodedInputStream.java:108)

...

[Mike Hearn]

Your encoding must be messed up. Nothing changed between 0.11 and 0.12 that might have caused that. What does Crypto.encrypt produce, base64?

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[MrKwiatkowsky]

Exactly, base64. But even if I disable encrypting by Crypto, it still doesn't work how it supposed to do. HD wallets didn't change anything? Maybe do you have some simple working example?

[Mike Hearn]

Where does the data differ between the exported bytes and imported bytes? I mean, this is your code so you're in the best position to debug it:   lots of people are serializing and deserializing wallets with 0.12 just fine, so I think the issue is in the extra stuff you're adding on top. Why are you even storing wallets as text?

[MrKwiatkowsky]

I think, that just after "writeWallet(wallet, byteOutput)" are some problems. Do you have some other ideas for storing wallets? Which class/functions I should use? Text is easy to crypt it with password. Do you have some learning sources with import/export? 

[Mike Hearn]

No crypto library I know of cares about whether you store the encrypted bytes as text or not.

Like I said, bitcoinj serialises to bytes and back, and I've never heard of the problem you are reporting. I suggest you debug the code, I can't help you any further.

[MrKwiatkowsky]

Solved. I give up with text and serialise to bytes and now it's working perfectly. Thank you for the help.

[Mike Hearn]

Great, good to hear you got it solved.