Blockchain Modularity: Separating Execution, Settlement, Data, and Consensus

Summary

This report explains the modular blockchain thesis as a way to address the scaling trilemma: the difficulty of maximizing decentralization, security, and transaction capacity at once. Rather than having one chain perform every task, modular designs distribute execution, settlement, data availability, and consensus across specialized layers or networks. The report presents Celestia as an example of a Layer 1 intended to provide a foundation for rollups that handle general computation.

It compares this approach with monolithic chains and earlier scaling systems. Bitcoin’s Lightning Network moves payments into channels, while Ethereum has explored sidechains, Plasma, sharding, and rollups. Solana instead pursues throughput by using powerful node hardware, with decentralization and uptime described as historical tradeoffs. Avalanche and Polygon illustrate other layered designs. The discussion emphasizes design constraints and project examples rather than measured proof that modularity solves the trilemma. The source text is incomplete, so its detailed treatment of later components of the modular stack is unavailable.

Key ideas

• The modular thesis assigns execution, settlement, data availability, and consensus to separate layers or networks.
• Rollups can execute general computation while relying on another network for underlying blockchain functions.
• Monolithic chains and layered systems make different tradeoffs among throughput, decentralization, security, and operational complexity.
• Hardware-intensive scaling can increase node costs and may affect decentralization or network reliability.
• The report presents modularity as a design thesis whose success remains to be demonstrated.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.