Ethereum 2.0 Phase 0 reaches final stage of testing as developer launches public multi-client testnest

Quick Take

  • Parity’s Shasper joins Prysmatic Labs’ Prysm on the Sapphire Testnet, making it the first public multi-client Ethereum 2.0 test network 
  • Prysmatic Labs, the client implementation team responsible for the Ethereum project, expects more clients to run on the testnet in the near future and is aiming for a Phase 0 mainnet launch in early 2020

There has not been a public multi-client Eth2 testnet up until now, according to Prysmatic Labs CEO Preston van Loon, but the team is accelerating its efforts and users can expect a Phase 0 mainnet launch in early 2020.

Sapphire was launched in June as the third single-client Eth2 testnet, followed by the Nimbus and Lighthouse testnets released earlier this year. Prysmatic Labs, client implementation team responsible for the creation of the Sapphire testnet, first ran a private multi-client test network at an interoperability event in Canada in September where clients shared a fixed set of validators.

This time, Prysmatic Labs released a full end-to-end public network where clients can participate in an environment identical that of the mainnet, van Loon told The Block. The purpose of the testnet, he said, is to run these clients in a chaotic environment that mimics how the final production environment works. It will help the team find edge cases and performance optimizations as well as solving issues that they have not imagined yet.


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