Ethereum produces blocks every \~12 seconds, creating L1 latency: users must wait not only for transaction confirmation, but also for credible assurance about how their transaction will actually execute. 

Latency is a major bottleneck for both traditional and based rollups built on Ethereum. 

Traditional rollups can reduce perceived latency through a centralized sequencer. That solves speed, but not credible state guarantees, while also introducing trust assumptions, centralization risk, and a single point of failure. 

Based rollups avoid that separate sequencer and align transaction ordering with Ethereum, but they still inherit Ethereum’s latency. 

Puffer Preconf breaks this trade-off. 

• For traditional rollups, it replaces trust-based soft confirmations with economically enforced preconfirmations. 

• For based rollups, it adds the fast execution layer needed to make Ethereum-aligned sequencing practical. 

Ethereum validators preconfirm transactions ahead of the L1 block, reducing latency from \~12 seconds to \~100ms, while preserving Ethereum’s decentralization. This means rollups no longer have to choose between fast UX and trustless infrastructure. 

Instead of a single sequencer, validators opt in, restake ETH, and delegate to gateways that provide preconfirmations under a deterministic schedule. 

All guarantees are economically enforced. If commitments are not honored, restaked ETH is slashed. 

Today, more than \~3.18M ETH secures this system. 

Puffer Preconf is the infrastructure rollups have been waiting for.

Rollups today face a brutal trade-off: speed or decentralization. Puffer Preconf is the infrastructure rollups have been waiting for.