🎉 Phoenix hard-fork successfully activates on Ethereum Classic 🎉

Stevan Lohja
Jun 1, 2020 · 3 min read

Update Jun 1: OpenEthereum is experiencing syncing issues, then recovering, but the issue is NOT splitting the network. Hopefully, a hotfix release is available to OpenEthereum users, but we don’t know when and recommend ETC consumers migrate to Core-geth as soon as possible.

The Ethereum Classic blockchain successfully activated the Phoenix hard-fork at block 10,500,839 or May 31, 2020 CT. Phoenix was inclusive of the ETH Istanbul features bringing Eth Classic and Eth use cases, tools, and collaboration opportunities to absolute technical compatibility while retaining their respective differences.

Phoenix marks the 3rd hard-fork completed within 1 year on the Ethereum Classic blockchain. The Atlantis, Agharta, and Phoenix hard-fork completed the ETC-ETH agenda making way for more valuable research and innovations to come.


The vast majority of the network hash is onboard Phoenix with a fraction of hash still on the old chain, but slowly decreasing as seen here.


Major exchanges, wallets, infrastructure providers, and other services are updated for Phoenix. Of course, check your apps for updates and ensure the services you use are Phoenix updated.

Core-geth, OpenEthereum, and Multi-geth Phoenix releases are in sync, but Hyperledger Besu became out-of-sync during the activation. Since Besu is not currently used by any services and rather known individuals (devs), then this client’s issue is not negatively impacting the network.

Secure your nodes post Phoenix

We understand a lot of ETC consumers were dependant on the Parity Ethereum client. However, Parity Ethereum is no longer maintained by Parity Tech and moved onto a community-managed OpenEthereum project. Multi-geth is also now a community-managed project. As the Parity Ethereum client family and Multi-geth have no solidified Ethereum Classic support. You should consider migrating to Core-geth sometime after Phoenix to secure your nodes. Hyperledger Besu is a relatively new enterprise client for Ethereum Classic, but it has the support and hopefully back up and running very soon.

More Phoenix/ network stats:

Congratulations to the Ethereum Classic community of developers, individuals, and ecosystem consumers who participated in this concensus-wide event. 3 hard forks within 1 year! My god you all are rock stars!

DISCLAIMER This is an emergent and evolving highly technical space. If you choose to implement the recommendations in this post and continue to participate, you should make sure you understand how it impacts you. You should understand that there are risks involved including but not limited to risks like unexpected bugs. By choosing to implement these recommendations, you alone assume the risks of the consequences. This post and recommendations are not a sale of any kind and do not create any warranties of any kind including but not limited to any relating to the Ethereum Classic network or the Ethereum Classic clients referred to herein.


ETC Core

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