TL;DR:
Ethereum is preparing to reduce deposit times to L2 networks and centralized exchanges to approximately 13 seconds, down from the current 2 to 13 minutes of waiting. The improvement is being implemented through the Fast Confirmation Rule (FCR), a fast confirmation mechanism currently in the implementation phase by consensus layer client teams, as reported by the network’s co-founder, Vitalik Buterin.
The problem FCR seeks to solve is rooted in the current verification model. Today, when a user transfers assets from Ethereum’s base layer to an L2 network or an exchange, the funds remain locked while the system awaits multiple block confirmations. Many exchanges and layer 2 networks use the method known as “k-deep,” which considers a transaction finalized only after a specific number of blocks, without formal guarantees. That waiting period creates friction in trading and bridge usage, while also immobilizing capital in bridging contracts.
The FCR replaces block counting with a system based on validator attestations. The mechanism evaluates whether a block can be treated as confirmed based on two assumptions: that the network is fast enough for validator messages to arrive within seconds, and that no single actor controls more than 25% of the ETH in staking. Both conditions fall below Ethereum’s strict finality criteria, but are sufficient for the majority of real-world use cases.
Researcher Julian Ma described the proposal as “the new industry standard for L2s and exchanges“. Buterin, for his part, noted that the mechanism can offer a “firm guarantee” that a transaction will not be reverted after a single slot, of approximately 12 seconds, under certain network conditions.
A key advantage of the upgrade is its compatibility with existing infrastructure. FCR reuses the “safe” tag within the JSON-RPC standard, allowing RPC providers and exchanges to adopt the improvement without significant technical modifications. Nodes that adopt the rule will be able to start using it without network-level coordination, and full deployment is expected within the coming months.
This initiative is part of the Ethereum roadmap presented by Buterin, which contemplates a progressive reduction of slot times from 12 seconds to a long-term target of 2 seconds, alongside improvements in native privacy and post-quantum cryptographic protections.
