Awesome Based Preconfirmations

Awesome Based Preconfirmations

A curated list of resources, research, and implementations related to preconfirmations in the Ethereum ecosystem. Special thanks to Swapnil of Nethermind for starting this months ago. During aggregation we also want to thank the Spire and mteam for also working on similar types of collections.

Introduction

Preconfirmations are a mechanism that allows block proposers to commit to a block’s contents before it is included in the blockchain. Follow the Ethereum Sequencing and Preconfirmations calls here.

Research and Discussion

Based Preconfirmations - The original post introduces the concept of based preconfirmations(November 8, 2023).
Based Preconfs FAQ - Based preconfs FAQ (March 2024).
Preconfirmations for Vanilla Based Rollups - Document outlines the design and mechanics to support preconfirmations in Vanilla Based Rollups (March 2024).
Preconfirmations Glossary & Requirements - Early work to define terms around preconfs flows (March 2024).
Strawmanning Based Preconfirmations - Analysis of a simple “strawman” preconfirmation setup (June 2024).
Rollup-Centric Considerations of Based Preconfimations - Explores how implementations of preconfirmations can configure blocktime and more efficient data publishing (August 2024).
Preconfirmations: The Fulfillment-Delivery Paradigm - Proposes a formal definition for a preconfirmation, outlined how they’re relevant in the context of decentralized systems and mev, and analyzed considerations to enable them efficiently (February 2025).

Validators

Preconfirmations under the NO lens - Research analyzing preconfs from a validator’s perspective (July 2024).
Delegation in Bolt: Outsourcing Sophistication While Preserving Decentralization - Article explores various “levels” of delegation from proposers for preconfs (January 2025).

Sidecars

Block Building Pipelines for Vanilla Based Rollups - Proposal for GMEV, a drop and replace for MEV-Boost (April 2024).
Based proposer commitments - Ethereum’s marketplace for proposer commitments - New sidecar that allows proposers to make commitments to preconf protocols (May 2024).
A simple, small, mev-boost compatible preconfirmation idea - Adjusting MEV-Boost to handle preconfs (June 2024).
Commit-Boost Community Calls - Community calls on Commit-Boost (June 2024).
Based Preconfirmations with Multi-round MEV-Boost - Propose multi-round MEV-Boost, a modification of MEV-Boost that enables based preconfirmations by running multiple rounds of MEV-Boost auctions within a single slot (July 2024).
Commit-Boost: Proposer Platform to Safely Make Commitments - New sidecar that allows proposers to make commitments to preconf protocols(July 2024).

Universal-Registry-for-Commitments

Credibly Neutral Preconfirmation Collateral: The Preconfirmation Registry - Introduces a design for a credibly neutral preconfirmations registry (May 2024).
Based Sequencer Selection - Exploratory proposal for a method of deterministically identifying sequencers on L2s to route transactions to (June 2024).
Sequencer Opt-In, Discovery and Communication - Initial exploration for validators to register / opt in to based sequecning (July 2024).
Universal Registry Contract - Developed by over a dozen teams and currently being used by multiple preconf teams. Documents can be found in the Github.

Lookahead

Fabric Call 1 - Presentation from Lin of Nethermind on lookahead research (February 2024).
Lookahead Background - Document going through the background on the lookahead and potential solutions (March 2024).
Fabric Call 2 - Deep dive on the lookahead and EIP 7917 (March 2024).
EIP-7917 and ETH Magicians post - EIP to make the lookahead on the L1 deterministic which has implications on preconfs (April 2024).

Preconf Transaction Flow

RFC Preconfirmations Flow Exploration - Early exploration of preconfirmations flows (May 2024).
ZuBerlin Workshop on Preconf flow - Worked on by multiple teams at zuBerlin for starting the Commitments API (June 2024).
Conditions API - Block Conditions Extension to the Builder API - Early idea around APIs to enable commitments / preconfs (June 2024).
Integrating Account Abstraction and Inclusion Preconfirmations - Proposal to directly leverage EIP-7702 for adoption of preconfs benefiting from batching, gas sponsorship, and secure delegations (January 2025).

Gateways-and-Delegation / Leader Elections

Analyzing BFT & Proposer-Promised Preconfirmations - Analysis of BFT preconfirmations and proposer-promised preconfirmations (November 2023).
The Preconfirmation Gateway ~ Unlocking Preconfirmations: From User to Preconfer - Introduces The Preconfirmation Gateway to completely abstract preconfirmations from users (January 2024).
Leaderless and Leader-Based Preconfirmations - Discussion on leader-based and leaderless preconfs (April 2024).
Proposer Commitments - A Validator’s Case For Delegation - Outlines perspective on gateways and the current market structure of Ethereum (February 2025).
Ahead-of-Time Block Auctions To Enable Execution Preconfirmations - Article analyzing a gateway as an unsophisticated entity and the other as a sophisticated builder (April 2025).
Based Ultrachain - Outlines approaches to gateways and delegation and why be based (April 2025).

Fair-Exchange

Solutions to the Preconf Fair Exchange Problem - Solutions for dealing with the fair exchange problem in leader-based preconfirmation setups (June 2024).
Preconfirmation Fair Exchange - Framework for analyzing protocols that seek to enforce timely-fair exchange of preconfirmations (March 2025).

Pricing-and-Incentive-Mechanisms

User-Defined Penalties: Ensuring Honest Preconf Behavior - Post outlining how users should specify their preferred penalty when requesting a preconf (February 2024).
Avoiding Accidental Liveness Faults for Based Preconfs - Proposal to solve accidental liveness slashing for proposers offering preconfs (March 2024).
Pre-confirmation Liveness Slashing Penalties from the Proposer’s Perspective - Explores the liveness penalty from the point of view of proposers from an economical perspective (March 2024).
Value-Capturing Based Rollups with Based Preconfirmations - Outlines a protocol which allows for based preconfirmations, while ensuring the based rollup captures much of the value generated from block building (May 2024).
Pricing Ethereum Blocks with Vol Markets with Implications for Preconfirmations - A discussion and illustrate approach for the pricing of preconfs that responds in real-time to current market conditions (May 2024).
Estimating the Revenue from Independent Sub-Slot Auction Preconfirmations - Analysis towards understanding the economic feasibility of preconfirmations (November 2024).
Analysing Expected Proposer Revenue from Preconfirmations - Article exploring expected revenue from preconfirmations vs the current MEV-Boost acution (November 2024).
A Pricing Model for Inclusion Preconfirmations - Article focuses on the pricing of inclusion preconfirmations (December 2024).
Pricing Future Blockspace: A Data-driven Approach - Introduce a pricing model developed for hedged preconfirmations with a focus on preserving underwriter funds and generating steady yields (December 2024).
Pricing Transactions for Preconfirmation - Proposes a framework for pricing preconfirmations but also to initiate a constructive discussion within the Ethereum community (February 2025).

Stacks-and-Implmentations

Bolt - Bolt enables Ethereum block proposers to provide credible commitments about the contents of their blocks.
Cairo - Early implementation, also ETHResearch post here.
ETHGas - preconf protocol.
Interstate - preconf protocol.
Luban Taiyi - preconf protocol.
Luban Preconfs for Blobs - Luban’s launch of preconfs for blobs.
mev-commit - A credible commitment network used for preconfirmations & more.
UniFi - preconf protocol.
XGA here and here - L2 Gas Auction platform.
ZuBerlin - Preconfs Devnet - Early devnets with various teams working on preconfs.

Articles

Grounded Relay: Superpowers from Relay Coordination - Explores using the relay as a coordinator for various services (November 2023).
State Lock Auctions: Towards Collaborative Block Building - Idea on how to implement state locks on Ethereum (February 2024).
Blob Preconfirmations with Inclusion Lists to Mitigate Blob Contention and Censorship (March 2024)
Uncrowdable Inclusion Lists: The Tension between Chain Neutrality, Preconfirmations and Proposer Commitments - Discussion to not crowd in protocol inclusion lists with preconfs / other commitments (April 2024).
Preconfirmations: Credible Promise of Future Execution - Overview of research around preconfs (June 2024).
Proposal: Onboard Bolt to the Lido Alliance - Proposal for Bolt (preconfs protocol) to join Lido Alliance with flows and key details around preconfs from Bolt (June 2024).
Preconfirmations: On splitting the block, mev-boost compatibility and relays - Article discussing XGA style preconfs (June 2024).
The Preconfirmation Sauna - Outlines Switchboard’s vision for how this preconfirmation competition should play out (June 2024).
Preconfirmations: Explained - Preconfs 101 (July 2024).
Proposer-Commitment Infrastructure in Ethereum - Describes the out-of-protocol solutions that are in development, and explore what sort of solution space they open up for different types of Ethereum users (October 2024).
Introducing ETHGas and Realtime Proposer Commitments to the Lido Community - ETHGas introduction to Lido Community with details on ETHGas flows (December 2024).
Preconfirmation for the Average Joe - Simple explanation on preconfs (January 2025).
What Based Rollups Need from the L1? - Article explaining why based rollups need faster block times (January 2025).
Road to Real-time: Preconfirmation Shreds - This article proposes an approach to achieving faster transaction (pre)confirmations in Layer 2 blockchain networks through incremental block construction (February 2025).

Presentations

Full-Day-Events

ZuBerlin - 2024
- Drew, Kubi, Lorenzo - Commit-Boost - Introducing the Commit-Boost effort, including a walkthrough of the code.
- Daniel - LimeChain - Discusses how preconfirmations interact with the L1 PBS pipeline.
- Conor - Switchboard - Introduces Preconfirmations Sauna, a credibly neutral effort to standardise preconfirmations.
- Harry - Luban - Shares a lottery mechanism for pricing preconfirmations.
- Jonas - Chainbound - Shares how Bolt enables L1 preconfirmations.
- Christian - Primev - Shares how mev-commit enables L1 preconfirmations.
- Tariz - Radius - Shares how Radius integrates based sequencing.
Preconf.erence Devcon 7
Preconf.erence ETH Denver
ETHGas ETHDenver Event on Preconfs

Proposer-Builder Separation (PBS) - A related concept that separates the roles of proposers and builders in the Ethereum consensus layer.
MEV-Boost - A middleware that outsources block building to a network of builders, enabling proposer commitments.

Contributing

Contributions to this awesome list are welcome! Please read the contribution guidelines before submitting a pull request.

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