Transaction fails without error code

Question

I'm playing with the Stellar java SDK and I'm trying to send to send some Lumens from a fully funded account to an other account on the testnet.

Once the transaction is complete I get back a response with all the field being null expect the "extra" field which has all its field to null except the "envelopeXdr" which is equal to

AAAAAPQl3 LgGzmS98AbidI2Pf5iG6/Y5JjjA8qGFcCFlAnlAAAAZABnH7IAAAABAAAAAAAAAAEAAAAAAAAAAQAAAAAAAAABAAAAACzKntDKAeTf87abUrrUsJAEPQPEfc7EEcKXsrnaAG2RAAAAAAAAAAAGjneAAAAAAAAAAAGFlAnlAAAAQDYKf5r5BqDRGHm 9K0zTfPQ0nSKMZxwKblhnW/GHV1gbXcm4NOfmBNBowjW9xHtY2p9 4MBPLRJUjYVeR2t3Qw=

How can I know what went wrong ?

EDIT:

Code:

        Network.useTestNetwork();
        Server server = new Server("https://horizon-testnet.stellar.org");
        KeyPair source = KeyPar.fromSecredSeed("...")
        KeyPair destination = KeyPair.fromAccountId("...");
        AccountResponse sourceAccount = server.accounts().account(source);
        Transaction transaction = new Transaction.Builder(sourceAccount)
            .addOperation(new PaymentOperation.Builder(destination, new AssetTypeNative(), "1000").build())
            .addMemo("")
            .build();
        transaction.sign(source);
        SubmitTransactionResponse response = server.submitTransaction(transaction);

I have taken the transcationXdr and input it in the Stellar laboratory to make a transaction and it worked....

This leads to the Java sdk having an issue when making the request, maybe some issue in the way it sets the "tx" in the post params

EDIT2 Yes it was, I had modified the source and messed around the encoding

Answer 1

Need to remove newline from your posted xdr

Using xdr viewer on stellar laboratory, your transaction result success

Ps: select PaymentResult as XDR type

Check here