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Recap from OST LIVE with Aidan Hyman, Co-Founder and CEO of ChainSafe Systems — Discussing Görli, The New Cross Client PoA Testnet
Aidan Hyman is an enthusiastic advocate and coordinator for several open source projects, including Görli Testnet, a cross-client, Proof-of-Authority testnet for Ethereum developers. Hyman is also co-founder and CEO of ChainSafe Systems, a group of developers working on Ethereum-related research and development projects, including Görli. Hyman joined us on Episode 49 of OST LIVE to discuss all things Görli and the challenges of building a consistently available, highly reliable testnet that is usable across all client implementations.
Origins of Görli
Görli started as a hackathon project at ETHBerlin created by the ChainSafe Systems team and Afri Schoedon, release manager at Parity. The initial idea was to implement Aura, Parity’s Proof-of-Authority consensus engine, into Go Ethereum. The implementation was very challenging, so the team decided to implement Clique, the PoA consensus engine in Geth, into Parity. Görli has since had many contributors from outside of the ChainSafe Systems team. The idea was to create a cross-client PoA testnet where multiple clients are able to be validators, as there was no cross-client testnet available at that time.
The three main testnets in Ethereum are Ropsten, Kovan, and Rinkeby. Ropsten is a Proof-of-Work testnet that requires miners. Reliability and consistency issues have emerged from PoW testnets because there are no financial incentives for miners. To alleviate some of the pressure and to create a consistently reliable testnet, teams at Parity and Geth each created their own PoA consensus engines: Aura and Clique. By having trusted validators confirm blocks, the network is able to effectively create a stable and consistent testnet for developers.
There is no mining involved with PoA. Essentially, a trusted group of validators get picked to finalize a block. PoA ...
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