Topic: [ANN][GRS] Groestlcoin | 1st to activate Segwit | Building Lightning Network - page 191. (Read 558212 times)

What happend on dwarfpool? Huge rise in difficulty and Mhs, difficulty around 300, but my sgminer show difficulty 159.
People please, spread the hash to others pools!

All updates are done, site is back up, you can now withdraw your funds.

Sure I'll support Groestlcoin, don't worry, I'll update to the new wallet as soon as it is released.

If this was Timewarp attack, then blockchain somewhere was injected double transaction or false coins.
Is that right?

UPDATE


EVERYBODY RELAX!

Dev and Pool OPS working together closely.
A fix will be implemented soon

Follow the discussion over at:
http://groestlcoin.org/forum/index.php?topic=47

In the meantime the block discovery time is ~ 1 minute as it should be. Not sure why.

IMO This issue provides opportunity to show how we handles themselves under pressure. In the long-term we can win confidence with our performance here.

I have also proposed a Team Groestlcoin member becomes oru Security Officer to assist Dev in preventing this happening again.

Thanks for your patience
Will keep you posted,

CH

http://grs.42tx.com/address/FrWPKm2gfspaQTb5JTijzaN68Gw68C2SZS 1385763GRS ...

It is this address assosiated with the attack. You do not hoard coins like that unless you know exactly what your doing and have a plan.

Hate to say it but it's time to dumb the coin.. unless you want to reward the attacker and make him rich.

Was very promising and the dev seems dedicated...

What is the lessons learned here? Why did it come to this? What made the attack possible?

Was the root cause the over 50% pool mining or is there flaws in Groestl algo?

It would be nice if you could continue supporting us after the fork.

i'm not sure if more interest is show.. There are just more problems ) without those, the thread would be somewhere at page 4 or 5 probably..

Glad to see more interest in the coin.Keep up the good work!

You can withdraw them in a sec, just doing some updates and have to reboot.

What about the coins we have in there?

Ive shut suprnova for time being, not sure What exactly is going on, will restart after the fork. Maybe.

To this time on the pictures: the web-page of pool takes it from wallet, not from the server.
And wallet takes from other nodes. Therefore sometimes block time is different from server time and from other blocks.
We will look at the situation during next hours, two pools are restarted (official and suprnova)

OK, situation update...

I worked on integrating DGWv2 into Groestlcoin wallet today. This is pretty straight forward.

Also, there is DGWv3 in Darkcoin codebase, and perhaps it is worth forking straight to v3.

But before requesting all pool operators to move to the new fork, I double checked statistics and found some disturbing info on Dwarfpool:







Looks like the time is jumping a bit.
And since dwarfpool has about 50% of hashrate (yes, again!!!) it seriously harms the DGW algo and it sets totally incorrect difficulty. Which in turn results in more blocks being found than planned.

I do not think that Dwarfpool is doing this deliberately and we are discussing this via PM with Atrides.
But I could not find any other "disturbing" statistics. I checked other pools as well, all block times are decreasing, never jumping.

It may be that Dwarfpool is connected to a particular node that is sending incorrect time or something like this.

If anyone is familiar with this - please let me know.

Also, pool operators. Please check your statistics and verify timestamps (for example suprnova timestamps are about 10 minutes off in WEB UI, but are ok in in the real wallet).

For now, I give it a bit of time for people to examine the situation and decide. Fork/not_fork, v2/v3, fix pool timestamps, etc?
And also, since it is Sunday so perhaps not all people are online.

Personally to Atrides: please double check your stratum or wallet. I know you have a lot of experience with this and I hope you can find the problem.


PS: It is very strange that both of my two pools crashed today, which resulted in hashrate redistribution.

Please always remember about 51% attack and spread the hash.

I'll be back online in about 8 hours. Please use this thread to discuss: http://groestlcoin.org/forum/index.php?topic=47.0

Thanks!

OK, I apologize again then.

Even with 10X faster I don't see how it is possible to mine all GRS in a few days.
Anyways, we'll fork shortly, so it'll be fine.

As for stopping mining GRS... Strange choice in given circumstances, but of course I respect it.
Thanks and good luck.

no,i'm always support GRS,
i use 700M rig  in dwarfpool all the days
yesterday ,i found this problem,it is not 2x,sometimes it is 10x faster,
perhaps it is a good time to dig ,but i quit

Hi LTCMAXMYR!

I don't see your play in this.
You started the panic and now you are still supporting this.

Shouldn't it be very good for you with your 1200mh rig?
You could be getting more GRS and selling it straight away.

Also, I don't see your 1200mh rig on any of the pools?
Is it possible that you are doing this attack?
I apologize in advance if I offended you, but having 1.2GH out of 18GH you could definitely do this.

And also you mentioned "most GRS will be dig out in few days"...
We are going to make a fork and all pool operators are onboard for this.
It'll happen soon. Also, the speed of GRS mining isn't that fast to mine all of GRS in a few days.
At most it is 2X the speed.

Thanks

crazy!!!
most GRS will be dig out in few days

Important announcement regarding the "time warp" attack.

Please follow the news here: http://groestlcoin.org/forum/index.php?topic=47.0

And don't panic! Your coins are safe. Though the GRS price will probably go down temporarily due to more GRS being mined than anticipated. So time to buy if you plan to increase your GRS stash.

I am not planning to provide updates on the matter in this thread.

I recommend that all keep on mining. You're currently getting more GRS than you should be getting due to this attack. So it is profitable.
Unless you sell imediately, of course [in such case it'll be same profit, but you'll also dump the GRS price].

If you are investor... Now is a time to buy!

I think the price will decrease a bit more due to this attack, but once the fix is in place [which will be matter of hours/days], the number of GRS mined will quickly decrease and that will drive the price up.

shall we stop mining or keep mining until you fix it ?