Fukuii
An EVM-compliant execution client in Scala 3 with pluggable consensus: native Proof-of-Work for Ethereum Classic and Mordor, and the Engine API for post-Merge Ethereum networks, paired with a consensus client. It continues IOHK's Mantis client and is maintained by Chippr Robotics LLC under Apache 2.0. Its maintainers mark it alpha, not yet recommended for production-critical workloads, so it is an alternative to try beside Core-Geth, the recommended client.
Latest release
Newest full release →Olympia release
TBD
No released client implements Olympia, which is a proposal. When Fukuii's maintainers publish a release that does, it will be listed here; until then, run the latest release. See Olympia for node operators for what the upgrade would change for a node.
Prerequisites
- JDK 25, which the container image carries
- 8 GB of RAM and 500 GB of storage for an Ethereum Classic node, per its hardware sizing
Run the latest release
Run a node with Docker
The route Fukuii's documentation recommends: a signed image from GitHub's container registry, with volumes for the chain data and configuration.
Download a release
Each release carries a distribution with launch scripts, a standalone JAR, checksums and a CycloneDX SBOM. Unpack it and start the node with the network name.
Configure and secure the node
Network selection, ports, peering, and which RPC namespaces to expose.
See what its tests cover
Fukuii publishes which test suites must pass before a change merges, and which only report.
Verify Installation
curl -X POST --data '{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":1}' http://localhost:8546