Introducing Topaz Testnet

Preston Van Loon
Prysmatic Labs
Published in
2 min readApr 14, 2020


This update was proudly written by all members of the Prysmatic Lab team.

Just over two years ago, Prysmatic Labs began their journey into implementing Ethereum 2.0 with three major milestones: Ruby, Sapphire, and Diamond. These milestones embodied our vision of how we wanted to help bring Ethereum to a global scale. We are proud to announce our final planned restart for Ethereum 2.0 Phase 0: The Topaz Test Network.

Ruby, Sapphire, Topaz, and Diamond Milestones

The Topaz test network is unique as it represents the full Ethereum 2.0 Phase 0 mainnet configuration. In the previous testnet, Sapphire, we targeted mainnet scale but used smaller 3.2 ETH deposits. For Topaz, validators are going to have to deposit the full 32 ETH on the Goerli ETH1 testnet to participate. To remain true to our original vision, Diamond represents the mainnet release of Prysm in Ethereum 2.0.

The Topaz test network is now accepting genesis deposits. Tomorrow, Prysmatic Labs will start turning down our Sapphire validators and begin sending new genesis deposits. If you would like to be a genesis validator, send your deposit before 00:00 UTC April 16, 2020 as that is when Prysmatic will begin sending deposits en masse to kick off the test network. Get started on the testnet onboarding site and join us on Discord!

Topaz Testnet Information

Deposit contract address: 0x5ca1e00004366ac85f492887aaab12d0e6418876

Configuration: Mainnet

Spec version: v0.11.1 (Latest release)

Prysm version: v1.0.0-alpha

Testnet site:

Prysm API:

System Requirements

Recommended Specifications:

Operating System: 64-bit Linux, Mac OS X, Windows, Arm64

Processor: Intel Core i7–4770 or AMD FX-8310 or better

Memory: 8GB RAM

Storage: 100GB available space SSD

Internet: Broadband connection

Minimum Requirements:

Operating System: 64-bit Linux, Mac OS X, Windows, Arm64

Processor: Intel Core i5–760 or AMD FX-8100 or better

Memory: 4GB RAM

Storage: 20GB available space SSD

Internet: Broadband connection

Interested in Contributing?

We are always looking for devs interested in helping us out. If you know Go or Solidity and want to contribute to the forefront of research on Ethereum, please drop us a line and we’d be more than happy to help onboard you :).

Check out our contributing guidelines and our open projects on Github. Each task and issue is grouped into the Phase 0 milestone along with a specific project it belongs to.

As always, follow us on Twitter or join our Discord server and let us know what you want to help with.

Official, Prysmatic Labs Ether Donation Address


Official, Prysmatic Labs ENS Name




Preston Van Loon
Prysmatic Labs

Ethereum Core Developer, Prysm team @ Offchain Labs