Ethereum Beacon Chain experiences 7 block reorg: What's going on?
Ahead of the Merge tentatively penciled in for August, Ethereum’s Beacon Chain experienced a seven-block reorganization (reorg) yesterday.
According to data from Beacon Scan, on May 25 seven blocks from number 3,887,075 to 3,887,081 were knocked out of the Beacon Chain between 08:55:23 to 08:56:35 AM UTC.
The term reorg refers to an event in which a block that was part of the canonical chain, such as the Beacon Chain, gets knocked off the chain due to a competing block beating it out.
It can be the result of a malicious attack from a miner with high resources or a bug. Such incidents see the chain unintentionally fork or duplicate.
On this occasion, developers believe that the issue is due to circumstance rather than something serious such as a security issue or fundamental flaw, with a “proposer boost fork” being highlighted in particular. This term refers to a method in which specific proposers are given priority for selecting the next block in the blockchain.
Core Ethereum developer Preston Van Loon suggested the reorg was due to a “non-trivial segmentation” of new and old client node software, and was not necessarily anything malicious. Ethereum co-founder Vitalik Buterin labeling the theory a “good hypothesis.”
Martin Köppelmann, the co-founder of EVM compatible Gnosis chain was one of the first to highlight the occurrence via Twitter yesterday morning, noting that it “shows that the current attestation strategy of nodes should be reconsidered to hopefully result in a more stable chain! (proposals already exist).”
In response to Köppelmann, Van Loon tentatively attributed the reorg to the proposer boost fork which hadn’t fully been implemented yet:
“All of the details will be made public once we have a high degree of
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