As one of the last tests before the merging on the main Ethereum blockchain, Ropsten, Ethereum’s oldest testnet, is due to begin its shift to proof of stake. On Wednesday, Ethereum’s official blog said that the Ropsten integration is likely, albeit the actual date may vary according to a few factors.
Practising the mainnet merging will be the primary goal of the testnet merge, which will take place later this year. A shadow fork of the main network and a testnet merge termed Kiln have both been used by Ethereum core developers in the past to conduct merge testing.
This event will merge Ropsten’s two chains, one proof of work and the other proof-of-stake beacon, into a single chain. When the Ethereum mainnet merging occurs, this will be the same method that is followed.
After the Ropsten merging, Ethereum nodes’ software must be tested to ensure that it works properly and without issues during the next event. Lighthouse, Lodestar, Prysm, Nimbus, Teku, Besu, Erigon, go-ethereum (geth), and Nethermind are just a few of the clients software teams participating in the next Ropsten merging.
When the proof-of-work version of Ropsten passes a pre-determined measure known as terminal total difficulty, the next merging will occur. In order to prevent any hostile entity from tampering with the merging by artificially obtaining hashrate, this has been set to 50 quadrillion (which happened the first time this test was scheduled).
Ropsten’s hashrate is low since it is a testnet. In order to override the Ropsten Terminal Total Difficulty (TTD), merging node operators must manually configure their clients, both for their execution layer and consensus player clients. A deadline of today’s close has been set for the completion of this project.
Following customer reports and fixes for problems found in Ropsten, developers will move on to additional scheduled merging tests, including Goerli and Sepolia.
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