Client Implementations

Three independent client implementations ensure EVM parity, security maintenance, and modern tooling for Ethereum Classic. Fukuii is recommended, Core-Geth is maintained through the transition, and Besu serves as a reference for cross-client testing.

Olympia UpgradeBlock number to be announced on the Olympia Community Developer Calls

Fukuii

RecommendedScala

Next-generation ETC client purpose-built for Ethereum Classic. The recommended client for node operators upgrading to Olympia.

Current: v0.1.240View upgrade guide →

Core-Geth

MaintainedGo

Established ETC client based on go-ethereum. Maintained through the Olympia transition with continued security updates.

Current: v1.13.0View upgrade guide →

Hyperledger Besu

ReferenceJava

Enterprise-grade client from the Hyperledger Foundation. Serves as a reference implementation for cross-client testing and validation.

Current: v26.3View upgrade guide →