通过运行时验证保护智能合约

Ao Li, Jemin Andrew Choi, Fan Long
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引用次数: 43

摘要

我们介绍了Solythesis,这是一个源到源的Solidity编译器,它以智能合约代码和用户指定的不变量作为输入,并产生一个工具化的合约,拒绝所有违反不变量的交易。我们观察到共识协议和存储层分别是以太坊的主要和次要性能瓶颈,因此设计了Solythesis。Solythesis使用我们新颖的增量更新和增量检查技术来最小化由仪表化存储访问语句引起的开销。我们的实验结果验证了我们的假设,即运行时验证的开销对于其他领域来说通常过于昂贵,实际上对于智能合约来说可以忽略不计。在我们的23个基准合约中,Solythesis的CPU开销平均仅为0.1%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Securing smart contract with runtime validation
We present Solythesis, a source to source Solidity compiler which takes a smart contract code and a user specified invariant as the input and produces an instrumented contract that rejects all transactions that violate the invariant. The design of Solythesis is driven by our observation that the consensus protocol and the storage layer are the primary and the secondary performance bottlenecks of Ethereum, respectively. Solythesis operates with our novel delta update and delta check techniques to minimize the overhead caused by the instrumented storage access statements. Our experimental results validate our hypothesis that the overhead of runtime validation, which is often too expensive for other domains, is in fact negligible for smart contracts. The CPU overhead of Solythesis is only 0.1% on average for our 23 benchmark contracts.
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