Ropsten testnet to transition to PoS

The Ropsten test network will be Ethereum’s first public testnet to transition from proof-of-work (PoW) to a proof-of-stake (PoS) consensus mechanism.

Launched in 2016, Ropsten is Ethereum’s longest-running PoW testnet. Testnets are used by developers to test decentralized applications (dApps) and smart contracts.

Last night, Ethereum‘s core developer Tim Beiko made the announcement via Twitter: “Ethereum’s longest-lived PoW testnet is moving to Proof of Stake! A new beacon chain has been launched today, and The Merge is expected around June 8th on the network”, he said.

After announcing what Beiko called a “first dress rehearsal” for miners, he proceeded to address the technical details of ‘The Merge’ via an extensive list of tweets, informing readers and developers alike to expect post-merge that “nothing should change”.

Around June 2, to become merge-compatible, Ropsten’s freshly launched beacon chain will experience an upgrade named “Bellatrix”.

After this, an estimated terminal total difficulty (TTD) value will be chosen to trigger the transition. Then miners will need to start configuring their own nodes with such a value.

A post on Ethereum’s blog page said: “After the Ropsten transition, two more testnets (Goerli and Sepolia) will be transitioned to proof-of-stake before focus shifts to mainnet.”

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Updated: 05/31/2022 — 13:00