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Hard fork can't even undo this, from my understanding.

olegkikin 9y ago
I'm pretty sure a hard fork can undo anything on the block chain. You can start over from the block before the hack. There's probably a cleaner solution than that though.
- csomar 9y ago
  The problem is, how do you reassign the funds after the hardfork? The funds are attached to addresses and not persons.
  - pyrale 9y ago
    You can revert the funds to the address that paid into the contract in the first place, since transactions are public.
    - csomar 9y ago
      That wouldn't move the money to their rightful owner but to the previous owner.
      - deleted 9y ago
        [deleted]
      - olegkikin 9y ago
        I don't think that's correct. If you only revert the stolen money transactions and all the branches of them since, almost nobody loses. The few stolen ETH that got sold will be a loss, but it's nothing compared to $35M.
        csomar 9y ago
        And you'll revert them to what? the buggy contract?
        olegkikin 9y ago
        It's a hard fork. The contract would be fixed. But you could also send the victim's money anywhere, just ask the victim where they want it, there are only 3 major ones.
  - wyldfire 9y ago
    Start at block n-1, disable the buggy contract, leave the "stolen" funds where they were.
    - csomar 9y ago
      They were in the contract (or the contract addresses).
sushid 9y ago
Why wouldn't hard fork be able to undo this transaction?
- saalweachter 9y ago
  Piecing together the comments up thread: there was apparently a unique twist to the infamous DAO hard-fork which allowed someone to steal the funds but not withdraw them (ie, transfer them to an exchange and get dollars out), so they were able to undo the transaction. There was no such twist this time around which means the funds could already have been transferred to an exchange and withdrawn as dollars or BTC. You can only undo the ETH part of the transaction, which would take money away from the exchange (or from people who have since bought the stolen coins from the exchange unknowningly) and give it back to the victim. That's a lot less palatable than taking the money from the thief, so it's unlikely to happen.
urda 9y ago
> Hard fork can't even undo this, from my understanding. This is completely incorrect. A hard fork can undo anything, it's just backing up before this happened and continuing down another path as if it didn't.

I'm pretty sure a hard fork can undo anything on the block chain. You can start over from the block before the hack. There's probably a cleaner solution than that though.

csomar 9y ago
The problem is, how do you reassign the funds after the hardfork? The funds are attached to addresses and not persons.
- pyrale 9y ago
  You can revert the funds to the address that paid into the contract in the first place, since transactions are public.
  - csomar 9y ago
    That wouldn't move the money to their rightful owner but to the previous owner.
    - deleted 9y ago
      [deleted]
    - olegkikin 9y ago
      I don't think that's correct. If you only revert the stolen money transactions and all the branches of them since, almost nobody loses. The few stolen ETH that got sold will be a loss, but it's nothing compared to $35M.
      - csomar 9y ago
        And you'll revert them to what? the buggy contract?
        olegkikin 9y ago
        It's a hard fork. The contract would be fixed. But you could also send the victim's money anywhere, just ask the victim where they want it, there are only 3 major ones.
- wyldfire 9y ago
  Start at block n-1, disable the buggy contract, leave the "stolen" funds where they were.
  - csomar 9y ago
    They were in the contract (or the contract addresses).

sushid 9y ago

Why wouldn't hard fork be able to undo this transaction?

saalweachter 9y ago
Piecing together the comments up thread: there was apparently a unique twist to the infamous DAO hard-fork which allowed someone to steal the funds but not withdraw them (ie, transfer them to an exchange and get dollars out), so they were able to undo the transaction. There was no such twist this time around which means the funds could already have been transferred to an exchange and withdrawn as dollars or BTC. You can only undo the ETH part of the transaction, which would take money away from the exchange (or from people who have since bought the stolen coins from the exchange unknowningly) and give it back to the victim. That's a lot less palatable than taking the money from the thief, so it's unlikely to happen.

urda 9y ago

> Hard fork can't even undo this, from my understanding. This is completely incorrect. A hard fork can undo anything, it's just backing up before this happened and continuing down another path as if it didn't.