https://bitcointalk.org/index.php?topic=320695
I made a branch of Bitcoin 0.9.3 plus backports including watch-only and a huge pile of patches cleaning it up from the master branch.  It seems to work fine although it is not heavily tested.  I suppose if you use ONLY for watch-only it can't be harmful?  Dunno.

Warren

On Sat, Oct 18, 2014 at 12:13 AM, Wladimir <laanwj@gmail.com> wrote:
On Fri, Oct 17, 2014 at 10:36 PM, Flavien Charlon
<flavien.charlon@coinprism.com> wrote:
> Hi,
>
> What is the status of watch-only addresses in Bitcoin Core? Is it merged in
> master and usable? Is there documentation on how to add a watch-only address
> through RPC.

It has been merged. There is the "importaddress" RPC call, which works
the same as "importprivkey" except that you a pass it an address.

> Also, I believe that is going towards the 0.10 release, is there a rough ETA
> for a release candidate?

Yes - aim is in a few months, probably by the end of the year.

AFAIK there are no nightly builds at this moment. Warren Togami was
building them for a while (at http://nightly.bitcoin.it/) but he
stopped some time around June.

It's not recommended to use master without at least a little bit of
development/debugging experience of yourself (to trace down problems
when they appear), so it's best to build it yourself if you're going
to test day-to-day development versions.

Wladimir

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