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Author Topic: EMERGENCY CHAIN FORK !!!!! dont move your coins  (Read 6854 times)

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EMERGENCY CHAIN FORK !!!!! dont move your coins
« on: March 12, 2013, 01:29:54 AM »
Hey Gavin... what is this??
Quote
CAlert(
nVersion = 1
nRelayUntil = 1363051236
nExpiration = 1363064736
nID = 1030
nCancel = 1001
setCancel =
nMinVer = 70001
nMaxVer = 70001
setSubVer = "Satoshi/0.8.0/"
nPriority = 5000
strComment = ""
strStatusBar = "URGENT: chain fork, stop mining on version 0.8"
)

https://gist.github.com/gavinandresen/5139421
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #1 on: March 12, 2013, 01:41:59 AM »
There is a developing situation in which a bug in the Bitcoin client software is causing a blockchain fork.  Those using Bitcoin-Qt v0.8 should not trust the transactions as being non-reversible even if the client shows the transaction having received six or more confirmations.

This latest on the situation may be monitored on the #bitcoin-dev IRC channel.

[The tl:dr on the bug … the v0.8 client software allows a larger transaction that the previous releases did not.  As a result v0.7 clients aren’t accepting those blocks.]
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #2 on: March 12, 2013, 01:53:09 AM »
From MtGox: "UPDATE: Miners are encouraged to downgrade to Bitcoin 0.7.2 - at least temporarily - to push the correct blockchain forward. Once the correct blockchain is longer than the 0.8-only blockchain, we will be able to resume bitcoin transactions."
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #3 on: March 12, 2013, 02:05:04 AM »
Critical: Current Bitcoin network fork. Action needed by mining pools. Merchants should hold transactions.

Posted by Pieter Wuille https://bitcointalk.org/index.php?topic=152030
#1 post
Quote
Hello everyone,

there is an emergency right now: the block chain has split between 0.7+earlier and 0.8 nodes. I'll explain the reasons in a minute, but this is what you need to know now:

After a discussion on #bitcoin-dev, it seems trying to get everyone on the old chain again is the least risky solution.
-    If you're a miner, please do not mine on 0.8 code. Stop, or switch back to 0.7. BTCGuild is switching to 0.7, so the old chain will get a majority hash rate soon.
-    If you're a merchant: please stop processing transactions until the chains converge.
-    If you're on 0.7 or older, the client will likely tell you that you need to upgrade. Do not follow this advise - the warning should go away as soon as the old chain catches up.
-    If you are not a merchant or a miner, don't worry.

#2 post
Quote
And now a more elaborate explanation:

0.7 and older nodes use BDB for storing the blockchain databases. It seems this database has a limit on the size of the modification it can make atomically to the database. With the larger blocks of the past days, it seems to have triggered the limit. The result is that 0.7 (by default, it can be tweaked manually) will not accept "too large" blocks (we don't yet know what exactly causes it, but it is very likely caused by many transactions in the block). Specifically, block
000000000000015c50b165fcdd33556f8b44800c5298943ac70b112df480c023 (height=225430) with >1700 transactions.

However. 0.8 (which uses a different database system) has no such limit, and happily accepts the block. As the majority of the hash power was on 0.8, the longest chain ended up using this block, which is not accepted by older nodes.

The solution is to (for now) go back to the old chain, which has block 00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932 at height 225430.
« Last Edit: March 12, 2013, 02:06:54 AM by bitcoinforum.com »
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #4 on: March 12, 2013, 02:22:24 AM »
 If you are not a merchant or a miner, don't worry.

Okay, I'm Not either. I just got started, and have only accumulated fractional amounts of BTC. But-
They Are in a wallet created with v.0.8...

Is my balance Safe?

Will I continue to be safely able to use this wallet?

Should I generate another using the previous version and move my funds?

Switch to something different altogether like InstaWallet?

Is trying to move my funds Right Now exactly the wrong thing to do?

How do I protect myself from this?

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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #5 on: March 12, 2013, 02:37:45 AM »
I dont know but I think what Gavin said is the right thing to do... Don't move your coins.
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #6 on: March 12, 2013, 03:26:19 AM »
This blog has updated information. Good work GoWest!

http://www.thebitcointrader.com/2013/03/breaking-blockchain-has-forked.html
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #7 on: March 12, 2013, 04:13:33 AM »
Follow The Side Chain Progress Here
https://coinbase.com/network/blocks
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #8 on: March 12, 2013, 04:22:20 AM »
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Re: EMERGENCY CHAIN FORK !!!!! dont move your coins
« Reply #9 on: March 12, 2013, 04:01:40 PM »
Quote
The original post lacked info for "regular users".  Here it is:

(1) If you are a "regular user" (not a miner), the best thing is to do nothing and wait a couple hours.
(2) If you are a "regular user", upgrading, downgrading, whining, FUD, etc, will make no difference.  Only miners have an incentive to do anything.  Otherwise, it doesn't matter which version you are running.
(3) Regardless of who you are, your transactions are not dead, your coins are not lost.  They will just temporarily be held up.  If you sent a transaction within the last few hours, it may take a few more hours before it's sorted out.
(4) If you insist on processing transactions right now it's probably best to wait 30+ confirmations.  It's just due diligence though ... an attacker would still need a tremendous amount of mining power, quick thinking, and a victim willing to part with a lot of BTC.
(5) By tomorrow this will be in the past and everything will appear to be normal again.  If you slept through this, you'd never know that anything happend (except for the price drop).

Let me reiterate, your coins are not at risk, your transactions are not lost.  It'll just take some time for the network to "iron itself out."  Everything will be okay.
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