KSG: A Symbolic Semantics Graph Generation Method of Smart Contract Based on the K Framework

Area of Science:

• Computer Science
• Blockchain Technology
• Formal Methods

Background:

• Formal semantics of blockchain smart contracts are crucial for verification and security analysis.
• Current methods using mathematical logic present high entry barriers and integration challenges with other program analysis techniques.

Purpose of the Study:

• To propose a novel semantic graph generation approach (KSG) for blockchain smart contracts.
• To overcome the limitations of traditional formal methods by providing a more accessible and integrable analysis framework.

Main Methods:

• Formally defining semantic rules for contract languages.
• Constructing a semantic interpreter and prover to automatically convert smart contract code into a scalable semantic graph.
• The graph integrates semantic control flow, data flow, execution rules, and verification constraints.

Main Results:

• The KSG approach generates a comprehensive semantic graph representing smart contract logic.
• The generated graph facilitates vulnerability detection and symbolic execution.
• The approach supports iterative optimization based on analysis outcomes.

Conclusions:

• The KSG approach offers a more accessible and practical method for formal verification of blockchain smart contracts.
• This technique enhances security analysis and aids developers in understanding contract execution.
• Demonstrated effectiveness through verification of reentrancy and honeypot contracts.