Re: [ANN] Official Sexcoin Thread - New MANDATORY upgrade: KGW Timewarp attack FIX
Dear Sexcoin Community
we have an important announcement to make:
The KimotoGravityWell retargeting algorithm is vulnerable to a timewarp attack. It's effectively a 51% attack with less than 51% of hashpower.
To fix the vulnerability a new MANADATORY Upgrade has been released. At block 643,808 the KWG fix will be activated. It is estimated to be this Friday 14 May, noon GMT.
Here are the download links:
Windows:
http://www.sexcoinforum.org/index.php?board=14.0
Source Code:
http://www.sexcoinforum.org/index.php?board=19.0
Linux and MAC Builds will be available ASAP. Please check http://www.sexcoinforum.org for the updates.
Please upgrade ASAP and help us spread this news about the mandatory upgrade. It is important that everyone (Exchanges, Mining Pools, Payment Systems) upgrades to fight the timewarp attack.
Thank you for your help and have a nice day.
Regards,
The Sexcoin Forum Team
I don't know the ways how to reach majority of people using SXC local wallets but situation on the network is not good. 90% or more nodes my node
was connected to recently are still v6.4.5 or older ones. At least make sure Cryptsy, Poloniex and other exchanges and also pools switched on time.
In general, due to lack of interest to stay up to date and irresposibility, there will be many SXC users who will probably not switch even a year later.
yes, coiner has contacted the pools etc. and we have word from cryptsy that they would update a few days ago. Not sure about other exchanges but I assume he at least tried.
The idea is that we will basically force the users to update, since their client will be broken the next time they pay attention to it.
I still see some 6.4.1 clients out there, which are not possibly working since 6.4.4 KGW feature went into effect at block 572K
the seeder status below shows somethign much different than actual sexcoind connections shown below.
I dont exaclty know how often it polls knonw nodes or does rediscovery
but, from my sexcoind output there is 30% penetration of 6.4.6 now..... not good, but I think we will survive since the pools have migrated and exchanges. both block explorers are upgraded also so when people go to check they should see the proper chain reported in block explorer.
Code:
[sxc@block ~]$ sudo service sexcoin-seeder status | awk '{print $12}' | sort | uniq -c | sort -g -r
38 "/Sexcoin:0.6.4.4/"
7 "/Sexcoin:0.6.4.1/"
4 "/Sexcoin:0.6.4.5/"
3 "/Sexcoin:0.6.4.6/"
1 version
[sxc@block ~]$ sexcoind getpeerinfo | grep "Sexcoin" | sort | uniq -c | sort -r
46 "subver" : "/Sexcoin:0.6.4.4/",
30 "subver" : "/Sexcoin:0.6.4.6/",
23 "subver" : "/Sexcoin:0.6.4.5/",
[sxc@block ~]$
38 "/Sexcoin:0.6.4.4/"
7 "/Sexcoin:0.6.4.1/"
4 "/Sexcoin:0.6.4.5/"
3 "/Sexcoin:0.6.4.6/"
1 version
[sxc@block ~]$ sexcoind getpeerinfo | grep "Sexcoin" | sort | uniq -c | sort -r
46 "subver" : "/Sexcoin:0.6.4.4/",
30 "subver" : "/Sexcoin:0.6.4.6/",
23 "subver" : "/Sexcoin:0.6.4.5/",
[sxc@block ~]$
It is after all, an emergency bugfix hardfork, so there is a balance between having every last person upgrade vs waiting weeks/months like we did for the KGW fork