"The mainnet shadow fork was a huge success," Ethereum developer Marius van der Wijden, who initially came up with the shadow fork, said on Twitter. While several bugs and issues were found, the devs were quick to propose fixes.
"Nethermind and Besu stopped at the transition, but a fix is being deployed for Nethermind that allows them to sync up," van der Wijden said. "Geth and Erigon are progressing happily. All beacon chain clients are in agreement."
More recently, the developers found yet another issue with the shadow fork that they "could've easily missed on the devnets," according to van der Wijden.
Described as a "historical event," the shadow fork is a way to stress test "assumptions around syncing and state growth," said Parithosh Jayanthi, an Ethereum Foundation developer, adding that it will also provide "a way to check if our assumptions work on existing testnets and/or mainnet."
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