The Ethereum blockchain is set for Proof-of-Stake (PoS) following the final shadow fork testing for the transition.
A shadow fork is when a portion of the blockchain is tested to make sure it will hold up to some of the permanent changes that are coming to Eth 2.0. The final test was completed on September 9 2022. It was the 13th since the first shadow fork in April 2022.
Goerli is one of 3 dedicated testnets, clones of the Ethereum blockchain, and typically offer a free environment for users to try out $ETH transactions and services. In a shadow fork however, tests are carried out on a version of the mainnet.
The shadow fork merges data from the execution layer and consensus layer to create another testnet.
“Shadow forks give us a more realistic environment to test in than launching new testnets because existing testnets already have transactions happening organically on them, and a large state size and block history which put nodes under more stress than new testnets.”
The shadow-fork test took place without issue as was confirmed in a tweet by infrastructure company, Nethermind: