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Holešky

Holešky is a public Ethereum proof-of-stake test network for staking, infrastructure and protocol-developer testing. Its repository provides network configuration, client identifiers and protocol parameters for software that connects to the testnet.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Holešky — OpenViST project profile in Layer 1.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Holešky when your work concerns Ethereum staking, infrastructure or protocol development and you need the network’s configuration details. The repository directs dApp, smart-contract and other EVM-functionality testing to Sepolia.

Who it is for

  • Ethereum client and infrastructure developers configuring software for a public test network.
  • Staking and protocol developers who need a test network distinct from dApp and smart-contract testing.

Documented uses

  • Identify Holešky in client software using its `--holesky` flag and chain or network ID 17000.
  • Consult network parameters, genesis data and discovery information when building network-aware tooling.
  • Plan staking, infrastructure or protocol-development testing against a public Ethereum proof-of-stake testnet.
Before you choose

Requirements & limits

The configuration repository is public and identifies its license as WTFPL.

  • The documented client flag is --holesky; both the chain ID and network ID are 17000.
  • Holešky is positioned for staking, infrastructure and protocol testing; the project directs dApp and smart-contract tests to Sepolia.
  • The repository provides network configuration rather than a hosted client, node or validator service.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Select Holešky by its network identifiers

Configure developer tooling to recognize Holešky using its documented chain and network IDs.

Before you start

  • Tooling that can be configured with a network ID or chain ID.

Steps

  1. Set the target network ID to 17000.

  2. Set the target chain ID to 17000.

  3. Use the --holesky network flag where the client or tooling supports it.

Expected outcome

The configuration identifies the target as Holešky using its listed network identifiers and flag.

Guide limitations

  • The repository does not document client-specific configuration commands or confirm connectivity.
  • For decentralized-application, smart-contract, and other EVM-functionality testing, the README directs users to Sepolia instead.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
10 October 2026
Original website title
eth-clients/holesky · Official homepage title · retained in its source language
How we review sourcesSuggest a correction

Related options

Sepolia — The repository recommends Sepolia for testing decentralized applications, smart contracts and other EVM functionality.