The Ethereum network will be undergoing a planned hard fork at block number 4.37mil (4,370,000), which will likely occur between 12:00 UTC and 13:00 UTC on Monday, October 16, 2017. A countdown timer can be seen here.
This is reported in the official Ethereum’s blog.
According to the company, a hard fork is a change to the underlying Ethereum protocol, creating new rules to improve the system. The protocol changes are activated at a specific block number. All Ethereum clients need to upgrade, otherwise they will be stuck on an incompatible chain following the old rules.
“If you are using an Ethereum client that is not updated for the upcoming hard fork, your client will sync to the pre-fork blockchain once the fork occurs. You will be stuck on an incompatible chain following the old rules, without replay protection against the main network. Old clients will be able to construct transactions, but will not be able to see the effects of those transactions”, – says in the blog.
What you need to do
Download the latest version of your Ethereum client:
- Latest version of Ethereum Wallet/Mist.
- Latest geth client (v 1.7.2)
- Latest Parity client (v 1.7.6)
- Latest Harmony client (v 2.1.0)
In the event that a critical bug is discovered, the following communication channels will be utilized: Ethereum Foundation blog.
Metropolis is a planned Ethereum development phase that includes two hard forks: Byzantium and Constantinople. Byzantium is occurring at block number 4.37mil. Constantinople does not currently have a release date, but is expected in 2018.