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    兼容智能合约的区块链分片技术综述

    Survey on Blockchain Sharding with Smart Contract Compatibility

    • 摘要: 区块链分片技术通过网络分区实现交易的并行处理,被公认为提升区块链可扩展性的最有效解决方案之一。然而,现有分片方案主要针对用户间点对点的资金转移交易,在支持图灵完备智能合约方面存在显著局限性。由于执行基于图灵完备智能合约的业务逻辑通常需要发起多个内部交易来同步状态,设计兼容智能合约的区块链分片(Blockchain Sharding with Smart Contract Compatibility, BS-SCC)架构面临独特的技术挑战。尽管该领域已有大量研究成果,但目前仍缺乏系统性综述来梳理学术进展和研究脉络。本文致力于填补这一研究空白,对BS-SCC方案进行全面的文献综述与研究展望。首先,我们深入剖析BS-SCC的研究背景与核心概念;其次,创新性地构建了基于状态存储维度和交易执行的分类框架,并提出包含可靠性、有效性和其他性能等关键指标的评估体系;进而,运用该评估体系对现有方案进行多维度比较分析;最后,我们识别出当前研究中的技术瓶颈,并指出具有潜力的未来研究方向,旨在为学术界和工业界提供有价值的理论指导和技术参考。

       

      Abstract: Blockchain sharding is widely considered to be one of the most effective techniques for improving blockchain performance, which divides the blockchain network into multiple shards to process transactions in parallel. However, existing sharding schemes focus on optimizing point-to-point asset transfer transactions, with limited focus on supporting Turing-complete smart contracts. Since executing the business logic based on Turing-complete smart contracts typically involves initiating multiple internal transactions to synchronize state, designing Blockchain Sharding with Smart Contract Compatibility (BS-SCC) schemes presents significant challenges. Although there are some studies in the literature, there still lacks a thorough survey on BS-SCC. This paper provides a comprehensive survey on existing BS-SCC schemes. First, we introduce the research motivation and basic concepts of BS-SCC. Next, we provide taxonomies of BS-SCC based on transaction execution and state storage. Then, we propose a set of criteria for evaluating BS-SCC that encompass reliability, effectiveness, and other additional properties. Furthermore, we conduct a thorough review on existing BS-SCC schemes by applying our proposed criteria as a measure to justify their pros and cons. Finally, a list of open issues is highlighted, and corresponding future research directions are suggested to offer theoretical insights and practical guidance for advancing the BS-SCC.

       

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