On Sunday, a Solidity developer announces a new mechanism that allows the reorganization of transactions in the Ethereum blockchain. With this, Ethereum’s immutability has been questioned.
The Solidity developer under username @0xbunnygirl announces on Twitter the “Request For Reorg” (RFR) contract. This creates a way for past transactions to be reordered or undone when the network reaches a consensus.
Source: Cryptocurrency - investing.com