Ethereum researchers propose Fast Confirmation Rule to cut bridge times from 13 minutes to 13 seconds

Ethereum researchers, backed by co-founder Vitalik Buterin, have proposed a mechanism called the Fast Confirmation Rule that could reduce bridge transfer times from roughly 13 minutes to 13 seconds without requiring a network hard fork.

The proposal uses validator attestations rather than block counting to confirm transactions, and could be implemented as an opt-in feature across exchanges and layer-2 networks.

Researcher Julian Ma unveiled the concept this week, arguing it would dramatically improve user experience for deposits, bridges, and cross-chain transfers while maintaining security under realistic network conditions.

A Shift Away From Slow Finality

Today, most users rely on canonical bridges to move assets between Ethereum’s mainnet and layer-2 networks. These systems often require multiple block confirmations—or even full finality—before transactions are considered secure. In practice, that can mean waiting up to 13 minutes.

The Ethereum Fast Confirmation Rule aims to eliminate that friction. Instead of relying on rigid block counts, it introduces a more dynamic approach to determining when a transaction can be safely treated as confirmed.

Ethereum researcher Julian Ma explained that the Ethereum Fast Confirmation Rule could reduce deposit times for most exchanges and L2s to just 13 seconds, a massive improvement over current standards.

This matters because many platforms already use “k-deep” confirmation rules—where transactions are accepted after a fixed number of blocks—but these lack formal security guarantees. The Ethereum Fast Confirmation Rule attempts to bring both speed and stronger assurances into the same framework.

How the Rule Works

Rather than counting blocks, the Ethereum Fast Confirmation Rule evaluates validator attestations to assess whether a block is sufficiently secure. In simple terms, it looks at how much of the network has agreed on a block, rather than how many blocks have followed it.

This shift allows the Ethereum Fast Confirmation Rule to make faster decisions without compromising too much on safety. However, the system relies on two key assumptions.

First, the network must be fast enough for validator messages to propagate within seconds. Second, no single entity should control more than 25% of staked Ether—an important decentralization threshold.

These assumptions are less strict than Ethereum’s full finality requirements but are considered practical for real-world usage. The Ethereum Fast Confirmation Rule is designed to operate within these bounds, offering a middle ground between speed and security.

“When a node detects more security is needed, it waits longer to fast confirm a block. It’s a feature, not a bug,” Ma noted, emphasizing the adaptive nature of the Ethereum Fast Confirmation Rule.

Backing From Ethereum Leadership

The proposal has already drawn support from key figures in the Ethereum ecosystem, including co-founder Vitalik Buterin. Buterin said the Ethereum Fast Confirmation Rule could provide a “hard guarantee” that transactions will not be reversed after a single slot—roughly 12 seconds—under the right conditions.

That level of assurance, combined with near-instant confirmation times, could significantly improve how users interact with decentralized applications, exchanges, and cross-chain bridges.

Importantly, the Ethereum Fast Confirmation Rule does not require a hard fork. Developers say it can be implemented as an opt-in feature, meaning nodes, exchanges, and infrastructure providers can adopt it independently.

Client teams are already working on integrations, and once deployed, the Ethereum Fast Confirmation Rule could be rolled out incrementally across the ecosystem.

Industry Implications

If successful, the Ethereum Fast Confirmation Rule could reshape how value moves across Ethereum and its growing network of layer-2 solutions. Faster confirmations would reduce friction for traders, improve capital efficiency, and make decentralized finance platforms more competitive with centralized alternatives.

Exchanges, in particular, stand to benefit. By adopting the Ethereum Fast Confirmation Rule, they could process deposits significantly faster, improving user onboarding and liquidity flows.

The broader impact could extend to cross-chain interoperability as well. Faster bridging times would make it easier for users to move assets between networks, a key requirement for the next phase of blockchain adoption.

Skepticism and Open Questions

Despite the optimism, not everyone is convinced the Ethereum Fast Confirmation Rule will perform as expected under real-world conditions. Critics have pointed out that the model relies heavily on assumptions about validator behavior and network integrity.

Some observers argue that the requirement for a supermajority of honest validators places significant trust in the system. Others question whether these assumptions will hold during periods of network stress or coordinated attacks.

Still, even skeptics acknowledge the potential upside. Near-instant confirmations could transform user experience—if the underlying assumptions prove reliab

The Ethereum Fast Confirmation Rule represents a pragmatic step forward for Ethereum, balancing speed and security in a way that reflects how the network is actually used today. By reducing confirmation times to seconds rather than minutes, it addresses one of the ecosystem’s most persistent pain points.

While questions remain about its resilience under extreme conditions, the Ethereum Fast Confirmation Rule is already gaining traction among developers and industry participants.

If widely adopted, it could mark a turning point—bringing Ethereum closer to the seamless, real-time experience users have come to expect from modern financial systems.