Ok, thanks. I've installed the wallet tool and used
cd bitcoinj/tools
./wallet-tool                but got a few errors...

[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.2:compile
(default-compile) on project bitcoinj-core: Compilation failure
[ERROR]
/home/marco/bitcoinj/core/src/main/java/org/bitcoinj/store/WindowsMMapHack.java:[34,9]
cannot find symbol
[ERROR]   symbol:   class Cleaner
[ERROR]   location: class org.bitcoinj.store.WindowsMMapHack
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions,
please read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the
command
[ERROR]   mvn <goals> -rf :bitcoinj-core

I don't know if they're serious!

If they are not, may I ask (please) should I jump to

./wallet-tool dump --wallet=/tmp/bitcoin-wallet-decrypted-backup
--dump-privkeys

and if so should I change the "bitcoin-wallet-decrypted-backup" to some
version of "com.google.bitcoin.params.MainNetParams.wallet" to suit my
setup, do you think?

Its the private keys I'm after but the dump tool looks as though it assumes
I've created a backup in the way you originally suggested

thanks,

Mark

On Mon, Aug 13, 2018 at 12:05 AM Andreas Schildbach <[email protected]>
wrote:

> Ah, it isn't even an Android app. Then you should be able to copy the
> wallet file and use it directly with wallet-tool. No need for the
> decrypt step in this case.
>
>
> On 08/12/2018 10:48 PM, Mark Dunne wrote:
> > Thank you very much for your response.
> >
> > A developer from the team that produced the UltraCoin Client wallet in
> > 2014 advised me that it "uses bitcoinj" and advised me to refer to the
> > wallet-tool, which you also referred me to (and coded, also, fair play
> > to you!) but it has very little functionality: There is no Options >
> > Safety > Backup wallet. You can send, receive bitcoin and make trades
> > using smart contracts. I only ever used it to receive and store the few
> > bitcoin that I bought. I knew very little except that the idea of a
> > maths-based digital currency was fascinating!
> >
> > Am I screwed? Did I back the wrong horse?!? I could send you the
> > UltraCoin Client executable file, if that's of any use or interest.
> >
> > I'm sure you have far more interesting and worthwhile projects to be
> > working on but I really, really appreciate any advice you can give.
> >
> > thanks you
> >
> > Mark
> >
> > On Sunday, August 12, 2018 at 8:37:19 PM UTC+1, Andreas Schildbach wrote:
> >
> >     Assuming that "Ultracoin Wallet" is a fork of "Bitcoin Wallet", your
> >     first step is creating a backup file: Options > Safety > Backup
> wallet.
> >     That's the file you're missing.
> >
> >
> >     On 08/09/2018 03:41 PM, Mark Dunne wrote:
> >     > I am using the
> >     >
> >     wallet.tool (
> https://github.com/bitcoin-wallet/bitcoin-wallet/blob/master/wallet/README.recover.md
> >     <
> https://github.com/bitcoin-wallet/bitcoin-wallet/blob/master/wallet/README.recover.md
> >) on
> >
> >     > Ubuntu (novice user) to trying and decrypt and access (dump) my
> >     private
> >     > keys on the UltraCoin Wallet, which uses the bitcoinj
> >     architecture, in
> >     > order to access BCC. The private keys are encrypted and I have no
> >     other
> >     > way to access/read them. The wallet information is stored in a
> >     > com.google.bitcoin.params.MainNetParams.wallet file which, on
> >     Windows,
> >     > is located in %AppData%/UltraCoin Client/ .
> >     >
> >     > When I try to execute the decrypt command; "openssl enc -d
> >     -aes-256-cbc
> >     > -md md5 -a -in bitcoin-wallet-backup-testnet-2014-11-01 >
> >     > bitcoin-wallet-decrypted-backup" it fails as the
> >     > "bitcoin-wallet-backup-testnet-2014-11-01" doesn't exist on my
> >     computer.
> >     > Can I amend some of the command to suit my com.google... file and
> >     if so
> >     > how, exactly?
> >     >
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