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A method of formally verifying a Solidarity smart contract

A smart contract and formal verification technology, which is applied in program code conversion, instrumentation, finance, etc., can solve the problems of equivalence verification and theorem proof conversion scheme difficulties, model verification state explosion, formal verification cannot be verified well, etc.

Active Publication Date: 2019-02-22
HANGZHOU QULIAN TECH CO LTD
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Problems solved by technology

However, equivalence verification and theorem proving have difficulties in transforming solutions, and model verification also has problems such as state explosion. Therefore, in terms of current technology, formal verification is still unable to verify certain forms of programs well.
Although it is difficult to design a general smart contract formal verification scheme, a smart contract for a specific language, such as a Solidity smart contract, can be formally verified on the premise of satisfying most of its semantics and functions

Method used

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  • A method of formally verifying a Solidarity smart contract
  • A method of formally verifying a Solidarity smart contract
  • A method of formally verifying a Solidarity smart contract

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Embodiment Construction

[0053] The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effect of the present invention will become clearer. The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] First, use the Anltr4 syntax to design the Solidity Model Language (SML) specification. This specification is used to describe the function of the program, so that the prover can verify the program by recognizing the language. Then use the anltr4 syntax analysis tool to design a prover, which can formally verify the Solidity smart contract with specifications. The implementation steps of the prover are to first import other dependent contract files into the target contract to be verified, an...

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Abstract

The invention discloses a method for formally verifying a Solidarity intelligent contract, which establishes a model from the Solidarity intelligent contract, uses Boogie language to describe the model, and then uses a Z3 prover to verify the model. The method of the invention designs a set of universal intelligent contract model specification language, solves the conversion problem between the Solidarity intelligent contract and the mathematical model, and has important reference value for formally verifying the intelligent contract of other languages. This method can help the developer of intelligent contract to verify the function of intelligent contract quickly, comprehensively and rigorously, locate the vulnerability of intelligent contract, and ensure the security of intelligent contract.

Description

technical field [0001] The invention relates to blockchain technology, smart contract technology, formal verification, Solidity contract language, Boogie model language, Z3 theorem prover, and in particular to a method for formal verification of Solidity smart contracts. Background technique [0002] Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. In 2008, Satoshi Nakamoto proposed the concept of blockchain, and in the following years, it became a core component of the electronic currency Bitcoin. By 2014, Blockchain 2.0 became a term for decentralized blockchain databases. As a second-generation programmable blockchain, its main feature is to allow users to write more sophisticated and intelligent agreements, also known as smart contracts. [0003] Smart contracts allow for trusted transactions without third parties, which are traceable and irrevers...

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Application Information

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IPC IPC(8): G06F8/10G06F8/41G06Q40/04
CPCG06F8/10G06F8/41G06Q40/04
Inventor 张丁文曹辉梁秀波邱炜伟李伟李启雷尹可挺
Owner HANGZHOU QULIAN TECH CO LTD
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