The Ethereum Light Client on HyperBEAM: Introducing ~helios@1.0

The Ethereum Light Client on HyperBEAM: Introducing ~helios@1.0

June 20, 2025

As part of the Hyperbeam Accelerationism manifesto by Decent Land Labs, we continue the mission of bridging the whole component stack of the EVM to HyperBEAM.

And today, we are introducing ~helios@1.0 device, the battle tested EVM consensus light client, encapsulated as a HyperBEAM device.

What is Helios?

Introduced in November 2022 by a16z, Helios is a consensus light client designed for speed, portability, and security. Helios converts an untrusted centralized RPC endpoint into a safe, unmanipulable and verifiable JSON-RPC for its users. It has fast synchronization, requires no storage, and is lightweight.

Introducing ~helios@1.0 device

cli

Given our Rust-flavored tech stack, we have decided to port Helios to HyperBEAM. The ~helios@1.0 device in its current implementation (at the time of writing), initiates the Helios client (and JSON-RPC server) at the start of the HyperBEAM node run. The JSON-RPC server is spawned as a separate process running in parallel behind the 8545 port (standard consensus RPC port).

The light client RPC methods follow Ethereum’s JSON-RPC specification, for the full list of supported methods, please refer to the Helios documentation

Check out the source code of the ~helios@1.0 device in loadnetwork/load_hb repo

Try it now

The ~helios@1.0 device is supported in the experimental HyperBEAM node instance run by us, hb.load.rs – the device is configured with support for Ethereum mainnet, which means, you can curl the eth.rpc.rs JSON-RPC API to interact with the device!

curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' https://eth.rpc.rs

What’s next

The ~helios@1.0 device is marking our second step in the EVM HyperBEAM after the ~evm@1.0 revm execution machine device (ultraviolet.load.network) – in the next few weeks we will introduce more upgrades to the helios devices making it multichain (EVM) with Load Network Alphanet support!