Abstract
Abstract With the growing popularity of smart contracts, the problem of validation of their correctness becomes more and more relevant, but at the moment there are no universally recognized tools for their testing. In this paper, we propose to apply the mutational analysis to improve reliability of Solidity smart contracts. We identified wide spread errors in the source code of existing contracts and developed a RegularMutator tool for mutation analysis. It has shown its effectiveness in testing a large smart contracts project. As a result of our analysis, we managed to improve the test suites of the project to find the discovered defects and, increase the quality of the test suite.
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