Single Builder Assumption

Definition ∞ The Single Builder Assumption posits that a single entity or small group of entities is responsible for constructing blocks in a blockchain network. This assumption implies that the block builder has significant control over transaction ordering and inclusion, potentially leading to centralization risks and opportunities for Maximal Extractable Value (MEV). It highlights a potential point of vulnerability in decentralized systems.
Context ∞ The Single Builder Assumption is a subject of intense scrutiny and debate within the blockchain community, particularly concerning its implications for network decentralization and censorship resistance. Discussions focus on mitigating the power of individual block builders through mechanisms like proposer-builder separation (PBS) and distributed block construction. A critical future development involves implementing and refining these decentralized block production strategies to reduce reliance on any single builder, enhancing overall network robustness.