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以太坊中间语言的可执行语义
引用本文:韩宁,李希萌,张倩颖,王国辉,施智平,关永. 以太坊中间语言的可执行语义[J]. 软件学报, 2021, 32(6): 1717-1732
作者姓名:韩宁  李希萌  张倩颖  王国辉  施智平  关永
作者单位:首都师范大学信息工程学院,北京 100048;北京成像理论与技术高精尖创新中心(首都师范大学),北京 100048;首都师范大学信息工程学院,北京 100048;电子系统可靠性技术北京市重点实验室(首都师范大学),北京 100048
基金项目:国家自然科学基金(61572331,61602325,61802375,61876111,61877040,62002246);北京市教育委员会科技计划一般项目(KM20190028005,KM202010028010);中国科学院计算技术研究所计算机体系结构国家重点实验室开放课题(CARCH201920)
摘    要:智能合约是实现各类区块链应用的核心软件程序.近期,以太坊区块链平台(Ethereum)上的智能合约暴露出大量错误和安全隐患,在国际上引发了智能合约形式化验证的研究热潮.为提供高可信度的验证结果,智能合约程序语言的形式化必不可少.本工作对以太坊中间语言Yul进行形式化,首次给出了其类型系统和小步操作语义的形式化定义.该语义为可执行语义(executable semantics),由120个Yul语言程序组成的测试集进行测试.本工作在Isabelle/HOL证明辅助工具中完成,为基于定理证明的智能合约正确性、安全性验证奠定了基础.

关 键 词:智能合约  Yul语言  Isabelle/HOL  形式化语义  以太坊
收稿时间:2020-08-30
修稿时间:2020-10-26

Executable Semantics of Ethereum Intermediate Language
HAN Ning,LI Xi-Meng,ZHANG Qian-Ying,WANG Guo-Hui,SHI Zhi-Ping,GUAN Yong. Executable Semantics of Ethereum Intermediate Language[J]. Journal of Software, 2021, 32(6): 1717-1732
Authors:HAN Ning  LI Xi-Meng  ZHANG Qian-Ying  WANG Guo-Hui  SHI Zhi-Ping  GUAN Yong
Affiliation:College of Information Engineering, Capital Normal University, Beijing, China;Beijing Advanced Innovation Center for Imaging Theory and Technology (Capital Normal University), Beijing, China;College of Information Engineering, Capital Normal University, Beijing, China;Beijing Key Laboratory of Electronic System Reliability and Prognostics (Capital Normal University), Beijing, China
Abstract:Smart contracts are key software components of blockchain applications. Recently, a great number of bugs and security vulnerabilities have been exposed in smart contracts on the Ethereum blockchain. This resulted in extensive research efforts in the formal verification of smart contracts at the international level. To obtain highly trustworthy verification results, the formalization of programming languages for smart contracts is necessary. In this work, we formalize Yul-the Ethereum intermediate language. The core of this formalization consists of the first formal definitions of the type system and the small-step operational semantics for Yul. The semantics is executable, and it is validated using a test suite of 120 Yul programs. Our formalization is performed in the Isabelle/HOL proof assistant. It lays a solid foundation for the formal verification of the correctness and security of Ethereum smart contracts through theorem proving.
Keywords:Smart Contract  Yul Language  Isabelle/HOL  Formal Semantics  Ethereum
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