from Part II - Technological Underpinnings of Web3
Published online by Cambridge University Press: 21 November 2024
Chapter 4 examines the scaling of Web3 to support widespread adoption. It first discusses why scalability is crucial for Web3, enabling it to handle high transaction volumes and users such as centralized systems. Scalability refers to the ability to sustain performance amid growth. Key factors are number of users, response time, storage, transaction costs, and throughput. Scalability is challenging due to the blockchain trilemma of decentralization, security, and scalability. Solutions involve optimizations at the network layer (layer 0), blockchain layer (layer 1), and Off-chain layer (layer 2). Layer 0 focuses on data transfer, using protocols such as BloXroute. Layer 1 aims to improve the blockchain itself via methods like sharding or new consensus algorithms. Layer 2 leverages Off-chain processing via rollups, sidechains, and state channels. Each layer has trade-offs. Rollups bundle transactions Off-chain using zero-knowledge proofs or fraud proofs before validating On-chain. Sidechains process transactions externally to relieve the main chain’s load. State channels allow Off-chain transfers between participants. No single scaling approach fits all cases. A combination of solutions across layers tailored to the application offers the most potential.
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