Last week's drama surrounding Ethereum occurred when the blockchain briefly stopped finalizing transactions, raising fears that some information sent to the chain would get scrambled or reversed. This apparent bug lasted about 25 minutes on Thursday, and then a bit longer on Friday, so only a handful of blocks—the units that make up a blockchain—were at risk.
News reports cited influential Twitter accounts to say the problem is now mostly resolved, and that it appears to have been rooted not in the underlying Ethereum protocol but rather in software clients used by validators—the entities that, under the new proof-of-stake system, confirm that a block and its batch of transactions are final and legitimate.
