Bitcoin Forum

** PLEASE UPDATE YOUR CLIENT TO 6.4.6 SOON AS POSSIBLE AT: **

To update your wallet please delete everything from the Worldcoin folder that stores your personal settings EXCEPT wallet.dat & the .conf file (if you have one).

I repeat - DO NOT DELETE WALLET.DAT

The worldcoin folder can be found in C:\Users\Yourusername\AppData\Roaming\worldcoin\ (windows 7)

You can access this hidden folder by typing %APPDATA% in the search box and clicking on Roaming then navigating to the worldcoin folder.

Ongoing list of known good nodes to use:
connect=74.121.190.25
162.243.74.110


[Windows]
Please visit www.worldcoinfoundation.org for the latest 6.4.6 download with all dependencies.

[Mac]
Please visit www.worldcoinfoundation.org for the download  (special thanks to Maxpower for assisting with this).

[Linux]
Currently only the windows client is compiled, for Linux users you can roll your own linux daemon: https://github.com/worldcoinproject/Worldcoin

Please go to the Worldcoin Foundation for all updates:
http://www.worldcoinfoundation.org/

On the 31st of October 2013 at 17:46:24 the Worldcoin blockchain was attacked to double spend Worldcoins that were earlier exchanged for BTC on MCX Now. The culprit who goes by the name of bazytw (transaction details and IP’s can be found here: http://pastebin.com/s6gMwLRg) logged into MCX Now earlier in the day and exchanged Bitcoin for 60000 Worldcoin.

Later the Worldcoin blockchain was 51% attacked and the Worldcoins were ‘double spent’.

Owing to the sophisticated design of the MCX Now transaction system the website was able to detect the attack and shut off in defense. As a result the owner of MCX Now and the Worldcoin team have been working hard over night to resolve this issue.

The Worldcoin foundation has confirmed that a rollback to before the attack will take place rendering the stolen coins useless. This means that all
Worldcoin wallet users, pools and exchanges need to update their client wallet as soon as possible to ensure they are running on the correct Blockchain.

The Worldcoin Foundation would like to thank members of MCX Now and The MCX Now owner for their support during this time.

WHAT THIS MEANS

Because the situation was picked up relatively quickly the team were able to work quickly to resolve this situation and issue an update to the wallet, but
it has also highlighted the necessity for early warning systems, and failsafes against 51% attacks. The foundation will be looking closely into providing
these systems to ensure the effect of an attack of this nature is greatly diminished in future, and is picked up more quickly. So, all in all, despite the
inconvenience this will cause to many users of Worldcoin, the attacker was thwarted and the network will now be improved which can only prove beneficial in
the long term.

Thanks for putting this right tread on here!

Reserved !

if any wallet problems or any questions feel free and join our channel

u can join freenode @ #worldcoin
or using this link : http://www.worldcoinfoundation.org/contact

https://coinex.pw/mining/pools/WDC updated

Thank you for the quick response

great work guys

wdc.coinmine.pl updated but still downloading blockchain

https://www.miningpool.co (https://www.miningpool.co) updated to latest version still not sure if the pool is on the correct chain though...  ???

niicee WDC backonline soon ;) !! and happy WDC Pump Friday !

Done.

Now only if I had a faster internet.

If you need assistance, please come to #worldcoin on irc (Freenode), and we can do some troubleshooting :D.

addnode=74.121.190.25

if ur stuck on 749533 block !!!

Anyone having issues with the chain not fully syncing, please add this to your worldcoin.conf file:

addnode=74.121.190.25

use:

connect=74.121.190.25    instead for now

Does not seem to help...

749534 is currently the right height.  You can see the correct height here (no login required, I'm not affiliated with this pool) http://wdc.vircurpool.com/index.php?page=statistics

if you are higher than this, your on the wrong chain.

http://wdc.theblocksfactory.com/ up and running on the good chain !

connect=74.121.190.25    instead of addnode for now

Nice job, now lets get some mining power going :D

Getting 404 error when I click the github link for windows.

Same.

Here's another link: https://github.com/worldcoinproject/Worldcoin-Clients/blob/master/worldcoin-windows-6.4.6.zip?raw=true

It must have cut off, I'll fix the heading:

https://github.com/worldcoinproject/Worldcoin-Clients/blob/master/worldcoin-windows-6.4.6.zip?raw=true

Direct link for the windows client (6.4.6) :

https://github.com/worldcoinproject/Worldcoin-Clients/blob/master/worldcoin-windows-6.4.6.zip?raw=true

In case anyone missed it, for now please make sure you add this to your worldcoin.conf file:


connect=74.121.190.25  

Knows good ip to get you started

we are back online and on right chain (hopefully)

Thanks, that worked.

Everyone has been extremely patient and polite through all of this.  Worldcoin's community rocks.  Thank you guys :D

Good job.

Mac wallet now available,  thank you for your patience:

https://www.dropbox.com/s/svid21i2i3a5oec/Worldcoin-Qt-0.6.4.6-Mac.zip

HashFaster's WorldCoin pool is up on the new chain! Come get the hashes rolling in.

http://wdc.hashfaster.com/index.php?page=statistics&action=pool

Thanks
ZC

Looking good, thank you!

Link for windows Update is dead again.

We are currently under maintenance. Please check back later

coming back asap!

[Windows]
https://mega.co.nz/#!9UlnyJzT!e4_FTlX8R2JZw6WEl2rYdUiFWQ5R6i1SRJWEeIexID4 <-- please copy entire url, bitcointalk crops after

Looks like there are some folks on the old chain:


to connect, DO NOT USE ADDNODE, put

    connect=74.121.190.25

in your worldcoin.conf. If you don't, you may be on the wrong blockchain.

"I just keep getting the app has requested to terminate in an unexpected way."

I added what was given on top of my 6.4.5 client, then deleted everything in my appdata folder but the wallet.dat

Well, since updating I can't open the client anymore

Try the latest download with all the dependencies already in it.  Download is on the worldcoin foundation home page:

http://worldcoinfoundation.org/

Try the latest download from the Worldcoin Foundation:

www.worldcoinfoundation.org

Just tried it.. same thing as before.. application has requested to terminate in anusual way...

fully synced on the new client, awesome job :)

also getting some errors when closing the client, two pop up windows with those runtime errors....might need to be looked at :)

Nice job catching this quickly, well done gents.

everything working fine http://wdc.mining4all.eu is back online

Great job

I did, I tried the posted link on the thread plus the link in the website.. Tried the download with two different browsers too but I still get the error when running the qt.

Updated my linux builds for Debian + openSUSE at
https://build.opensuse.org/package/show/home:p_conrad:coins/worldcoin

So this guy went through all this trouble to steal only $2000 ?

thanks waited depian build!

I apologize for the slow response, I was away from the forum.  Some people have reported the same issue in irc earlier today.  The issue was resolved by copying the 6.4.6 worldcoin-qt + the libstdc++_6.dll to their 6.4.5 wallet.   Make sure you're also deleting everything but your wallet.dat in the %appdata% worldcoin folder.  For further assistance, please join our awesome community in irc: #worldcoin (freenode).  We have a lot of friendly people willing to assist.

Bumping,  just want to make sure everyone has seen this and updated.

Hello,

I just updated my client but now the client doesn't even run, I only get this message:

http://img822.imageshack.us/img822/6657/zhmd.png

What can I do?

Best regards,
btctr4d3r

Delete your Blockchain/Database within AppInfo/Roaming/WorldCoin if within windows before loading.

do NOT delete your wallet or conf file if you have one, but you should have your wallet backed up.

Hope this helps

Sorry, my mistake, didn't read all the instructions and just deleted the client folder instead. It's now working and downloading the chain.

Regards,
btctr4d3r

For me... the mega page never loads... just a cloud and spinning gear.

Used the link from the main site... copy pasted link from here... all do the same... no DL just basic mega page.

EDIT finally got it but Mega was still troublesome... think it is on their end...

any more safe nodes?
we run in 1 connection... this is not very safe

addnode=74.121.190.25
addnode=162.243.74.110   <- not connecting

updated.

thx for quick fix guys - good work.
 8)

I suppose their shutdown played a major role in the discovery of the problem and the fix.


I think you're missing an important point here: the moment someone controls >50% of the network hashrate the coin is effectively centralized.


See above. Furthermore, decentralization doesn't mean lack of checkpoints. Everybody is free to use the old client and the double-spend leg of the blockchain. Only if the majority of users switch to the new client version the blockchain is effectively rolled back. But in that case everything is fine - the majority decides in a decentralized way.


This leads to interesting questions, indeed. What would have happened if only 6200 or 620 or 62 coins had been double spent? What if the ripped off entity hadn't been mcxNOW but only some nameless poor guy? What if the double spend had only been discovered several days later?

51% attacks have become a more or less regular reality, and the community needs to find a way to deal with this.

I realized this isnt the thread for this. Also i agree with most of what you said

WDC did everything they could.

Ill move the above to another thread and change topics.

I the real problem is there is really nothing else that could have been done. A system needs to be designed to prevent this yet stay decentralized. Voting systems are a great choice but a hard to prevent manipulation.

Perhaps some sort of decentralized checkpointing could take place. But then you sorta get into a proof of stake scenario. Perhaps higher #'s of confirmations could be used in the future if attacks persist. One of worldcoins greatest features is fast transaction. Even doubling them would keep it among the fastest

I figured out my problem as even moving my wallet.dat file to new computer and starting the new worldcoin if i try and use my old wallet. (with lots of coins in it) I get the application has terminated in unexpected way from C++ runtime library. New (empty) wallet works great....

I have this same problem. how do I get the coins from my wallet.dat if worldcoin qt wont load it?