4 ms·

The Robin Hood Group and Ethereum Classic

44 points by kushti 10y ago

caf 10y ago
Is it possible for someone without knowledge of the sending private key to replay a transaction from one side of the hard fork to the other?
- bkolobara 10y ago
  As the transaction is already signed on one chain you don't need the private key to issue the same transaction on the other.
  - wolfgke 10y ago
    But isn't this a sign that the Ethereum protocol might be susceptible to replay attacks?
- appleflaxen 10y ago
  those coins don't exist on the new ETH blockchain, so that particular transaction cannot be performed on the new block.
- jobigoud 10y ago
  As it stands you got two seemingly contradicting answers to your question. They are actually both sort of correct. You can indeed try to replay a transaction from one chain to the other. Everything in the transaction is still valid. It will be propagated by the p2p nodes as they just perform crypto sanity check. It doesn't mean it will be included in a block though. For the replay to goes through and be included in the blockchain, there needs to be at least as many coins held by the address in the other chain. This is usually not the case for addresses created post-fork. However, all addresses that had coins before the fork are susceptible to this issue. There are guides to "split" the coins so that you can safely separate them and hold them in brand new addresses that have zero balance on the other chain. It's a painful issue that was raised before the fork but had been downplayed by pro-fork supporters as the old chain was supposed to die quickly.
nl 10y ago
For those not following along at home, ETC (Ethereum Classic) is the original, pre-fork block chain. It was "supposed" to die, but one exchange kept it open, and miners found they could make good money (BTC) on it. So it didn't die, and although it isn't worth as much as (new) Ethereum it appears to be viable. Ethereum Classic is where the DAO attacker's money ended up.
- 20yrs_no_equity 10y ago
  Everyone expected it to die and most hash power switched over, but not all. Enough was left that the anti-fork people started calling it classic and poloniex started trading it, probably to let people who now had ETC liquidate. But the trading wasn't a straight line to zero as most expected, the "movement" became s but real and now it is still a very large crypto currency by market cap - and hash rate- despite being the "loser". Given how dynamic Ethereum is code wise there may well be a market for an Ethereum alternative for ETC to fill. Lisk and Expanse seem to indicate this is possible.
  - erikpukinskis 10y ago
    It'll be interesting to see if, in the event of (inevitable?) future forks to Ethereum, if this branch becomes a long-running "just leave it as it is and let the market sort it out" experiment.
appleflaxen 10y ago
the members of the RHG that justified this to themselves have really bad judgment. It just makes the ETH community appear even more hypocritical than they did after the hard fork.
azeirah 10y ago
Hey wait.. I have a large stack of eth I bought during the pre-sale, is this etc, or is this eth? I haven't been following ethereum too closely
- kushti 10y ago
  So you have both now.
- patrickburke 10y ago
  You have coins on both block chains now
- mthoms 10y ago
  Merry Christmas! Just be careful, read up on replay attacks before splitting your ETH/ETC.

44 points by kushti 10y ago

caf 10y ago

Is it possible for someone without knowledge of the sending private key to replay a transaction from one side of the hard fork to the other?

bkolobara 10y ago
As the transaction is already signed on one chain you don't need the private key to issue the same transaction on the other.
- wolfgke 10y ago
  But isn't this a sign that the Ethereum protocol might be susceptible to replay attacks?
appleflaxen 10y ago
those coins don't exist on the new ETH blockchain, so that particular transaction cannot be performed on the new block.
jobigoud 10y ago
As it stands you got two seemingly contradicting answers to your question. They are actually both sort of correct. You can indeed try to replay a transaction from one chain to the other. Everything in the transaction is still valid. It will be propagated by the p2p nodes as they just perform crypto sanity check. It doesn't mean it will be included in a block though. For the replay to goes through and be included in the blockchain, there needs to be at least as many coins held by the address in the other chain. This is usually not the case for addresses created post-fork. However, all addresses that had coins before the fork are susceptible to this issue. There are guides to "split" the coins so that you can safely separate them and hold them in brand new addresses that have zero balance on the other chain. It's a painful issue that was raised before the fork but had been downplayed by pro-fork supporters as the old chain was supposed to die quickly.

nl 10y ago

For those not following along at home, ETC (Ethereum Classic) is the original, pre-fork block chain. It was "supposed" to die, but one exchange kept it open, and miners found they could make good money (BTC) on it. So it didn't die, and although it isn't worth as much as (new) Ethereum it appears to be viable. Ethereum Classic is where the DAO attacker's money ended up.

20yrs_no_equity 10y ago
Everyone expected it to die and most hash power switched over, but not all. Enough was left that the anti-fork people started calling it classic and poloniex started trading it, probably to let people who now had ETC liquidate. But the trading wasn't a straight line to zero as most expected, the "movement" became s but real and now it is still a very large crypto currency by market cap - and hash rate- despite being the "loser". Given how dynamic Ethereum is code wise there may well be a market for an Ethereum alternative for ETC to fill. Lisk and Expanse seem to indicate this is possible.
- erikpukinskis 10y ago
  It'll be interesting to see if, in the event of (inevitable?) future forks to Ethereum, if this branch becomes a long-running "just leave it as it is and let the market sort it out" experiment.

appleflaxen 10y ago

the members of the RHG that justified this to themselves have really bad judgment. It just makes the ETH community appear even more hypocritical than they did after the hard fork.

azeirah 10y ago

Hey wait.. I have a large stack of eth I bought during the pre-sale, is this etc, or is this eth? I haven't been following ethereum too closely

kushti 10y ago
So you have both now.
patrickburke 10y ago
You have coins on both block chains now
mthoms 10y ago
Merry Christmas! Just be careful, read up on replay attacks before splitting your ETH/ETC.