Abstract

This article introduces the design for State Lock Commitment, a new blockspace commitment mechanism for Proposer-Builder Separation (PBS). Current inclusion-based commitments fail to guarantee execution consistency, leading searchers to adopt risk-averse strategies that reduce market efficiency.

We propose a dual-component approach that goes beyond simple inclusion promises. First, an Exclusion Commitment is issued: a builder-agnostic, upfront reservation that guarantees a specific state will not be altered by conflicting transactions. This is followed by a standard Inclusion Commitment (preconfirmation) for the bundle that wins the subsequent auction. Together, these commitments provide strong guarantees equivalent to Execution Commitment, allowing searchers to bid with greater confidence. The architecture includes a Gateway (for proposers) and a LockEngine (for builders), enabling proposers to auction exclusive state rights, prevent conflicts, increase revenue, and foster a more robust and efficient MEV market.

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