Ethereum is about to make waiting for transactions a thing of the past. Ethereum client teams are testing the Fast Confirmation Rule (FCR), a mechanism that could cut Layer 2 bridge and exchange deposit times by up to 98%, bringing them down from 13 minutes to mere 13 seconds — without a hard fork.

Currently, canonical bridges rely on multiple block confirmations, often delaying transactions for over a dozen minutes.

From Waiting to Lightning-Fast: How FCR Works

Instead of the slow block-counting method, FCR utilises validator attestations to determine when a block is safe to treat as confirmed.

Unlike traditional “k-deep” confirmations, which provide no formal guarantees until several blocks later, FCR can finalize transactions after a single slot, which would take just 12 seconds.

The mechanism assumes that validator messages propagate quickly and no single entity controls more than 25% of staked Ether. These conditions fall short of Ethereum’s strict finality rules but are considered sufficient for most real-world use cases.

“When a node detects more security is needed, it waits longer to fast confirm a block. It's a feature, not a bug,” Ma said.

Ethereum co-founder Vitalik Buterin also backed FCR, describing it as providing a “hard guarantee” that a transaction will not be reverted after one slot under typical network conditions.

One of FCR’s most exciting features is that it doesn’t require a network-wide hard fork. Nodes can adopt the mechanism independently through client updates and API integrations, while exchanges, Layer 2s, and other infrastructure providers can implement it seamlessly.

Client teams are already building implementations, making FCR a practical upgrade that could drastically improve Ethereum’s user experience for bridge transactions and exchange deposits.

Near-Instant Transactions, But Some Skepticism Remains

Despite the promise of almost instant deposits, some in the community remain cautious. Critics argue the model heavily relies on the honesty of validators and question whether it will hold under network stress or attacks.

Proponents counter that, if the assumptions hold, Ethereum users could soon enjoy lightning-fast bridging, unlocking smoother DeFi activity, faster exchange on-ramps, and a dramatically improved Layer 2 experience.

The Fast Confirmation Rule represents a bold step toward making Ethereum feel as fast as traditional finance, solving one of the network’s most persistent frustrations — waiting for finality. For users, 13 minutes might soon be a distant memory.