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Geth 1.4.10 "Return of the ETH" is the
go-ethereum team's DAO hard-fork implementation. It enables anyone to choose whether they would like to support the DAO hard-fork or oppose it, and take them to their blockchain of choice.
- To support the DAO hard-fork, start Geth with
- To oppose the DAO hard-fork, start Geth with
On startup (on the main network) Geth will print the currently configured choice, which you can freely change with the appropriate flag at any time. If neither of the above flags is specified, the previous configuration is used. If no fork choice was ever provided, Geth will default to supporting the fork per the majority vote.
Please note, fast sync and light clients do not verify state transitions, only perform header validations and PoW checks. As such, a fork unaware client (i.e. non-updated one) will always fast-sync to the longest chain, as it doesn't have the necessary information on what to look for in the headers. Even if you oppose the fork, please update so your client knows what chain to avoid.
- Hard fork spec: https://blog.slock.it/hard-fork-specification-24b889e70703#.cumx78uqu
- Implementation details: #2814