Ethereum Launches Fast Confirmation Rule for Quicker Deposits

Ethereum's developers are rolling out a new Fast Confirmation Rule designed to slash transaction confirmation times for asset deposits from the main network to Layer 2 solutions and centralized exchanges, reducing waits from several minutes to about 13 seconds.

The update, known as FCR, targets a key bottleneck in the Ethereum ecosystem where users transferring funds via canonical bridges often face delays of two to 13 minutes. These waits occur as systems require multiple block confirmations or full economic finality to ensure transactions cannot be reversed. Under FCR, confirmations can occur within a single slot, Ethereum's 12-second block interval, representing an 80 to 98 percent reduction in processing time depending on the bridge and destination.

Ethereum researcher Julian Ma described the mechanism in a recent post, stating it evaluates validator attestations rather than relying on the traditional k-deep method, which confirms transactions only after a set number of subsequent blocks and provides no formal security guarantees. Instead, FCR assesses a block's fork-choice weight and applies robustness checks to determine if it is non-revertible. This attestation-based...