Data Availability Committee

Definition ∞ A Data Availability Committee is a group of independent entities responsible for verifying that transaction data for a Layer 2 scaling solution is published and accessible. This committee operates within certain rollup architectures, particularly those with a hybrid data availability model, to provide an additional layer of security and trust. Their function involves attesting that off-chain transaction data, which is not directly posted to the main blockchain, is indeed available for network participants to reconstruct the state. This mechanism helps maintain the integrity and censorship resistance of the Layer 2 system.
Context ∞ Data Availability Committees serve a critical function in bridging the gap between centralized and fully decentralized data availability solutions for Layer 2 networks. While they offer a practical approach to scaling, they introduce a degree of trust assumption, as participants rely on the committee’s honesty. The long-term trajectory for Layer 2 designs involves minimizing such trust assumptions, moving towards more cryptographically verifiable data availability methods. This evolution aims to enhance the security and decentralization of scaling solutions.

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→L2 Scalability

→Sequencer Bottleneck

→Set Byzantine Consensus

Decentralized Rollup Sequencers Using Set Consensus Ensure Full L2 Autonomy

Set Byzantine Consensus creates a decentralized arranger service, eliminating the sequencer bottleneck and enabling fully autonomous Layer 2 rollups.

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→Distributed Algorithms

→Offchain Computation

→Protocol Correctness

Set Byzantine Consensus Decentralizes Rollup Sequencing and Data Availability

Set Byzantine Consensus introduces a new primitive for L2s, enabling a decentralized 'arranger' service to eliminate sequencer centralization and censorship risk.

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→Transaction Ordering

→Shared Sequencing

→Censorship Resistance

Set Byzantine Consensus Decouples Rollup Sequencing from Centralized Control

The research introduces Set Byzantine Consensus to construct a Decentralized Arranger, fundamentally solving rollup centralization by separating transaction content agreement from final ordering.

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→Block Batching

→Single Point Failure

→Rollup Architecture

Set Consensus Decentralizes Rollup Sequencing and Data Availability

Set Byzantine Consensus enables a decentralized arranger service, eliminating centralized sequencer risks and securing Layer 2 evolution.

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→Transaction Ordering

→Set Consensus

→Rollup Scaling

Set Consensus Decouples Rollup Sequencing from Centralized Authority

The decentralized arranger leverages Set Byzantine Consensus to unify transaction ordering and data availability, eliminating the centralized sequencer bottleneck.

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→Proof of Correctness

→Layer Two Scaling

→Data Availability Committee

Decentralized Arrangers Unify Sequencing and Data Availability via Set Consensus

An extension of Set Byzantine Consensus creates a decentralized arranger service, formally eliminating L2 sequencer centralization risk and ensuring data integrity.