论文标题
第一次看Defi Oracles
A First Look into DeFi Oracles
论文作者
论文摘要
最近，新兴的分散财务（DEFI）将加密货币的承诺进一步发展，利用其分散的网络将传统的金融产品转变为无信任和透明的协议，而无需中介。但是，这些协议通常需要关键的外部信息，例如货币或商品汇率，在这方面，它们依赖于特殊的Oracle节点。在本文中，我们介绍了在实践中部署的Defi oracles的首次研究。首先，我们研究了依赖于Oracles数据的主流Defi平台的设计。我们发现，这些设计令人惊讶地将Oracles定位为没有责任感或低责任的受信任的当事方。然后，我们提出了部署的甲壳大规模测量的结果。我们发现并报告说，Oracles报告的价格经常偏离当前汇率，Oracles并非没有运营问题，其报告包括异常。最后，我们比较甲骨文的设计并提出潜在的改进。
Recently emerging Decentralized Finance (DeFi) takes the promise of cryptocurrencies a step further, leveraging their decentralized networks to transform traditional financial products into trustless and transparent protocols that run without intermediaries. However, these protocols often require critical external information, like currency or commodity exchange rates, and in this respect they rely on special oracle nodes. In this paper, we present the first study of DeFi oracles deployed in practice. First, we investigate designs of mainstream DeFi platforms that rely on data from oracles. We find that these designs, surprisingly, position oracles as trusted parties with no or low accountability. Then, we present results of large-scale measurements of deployed oracles. We find and report that prices reported by oracles regularly deviate from current exchange rates, oracles are not free from operational issues, and their reports include anomalies. Finally, we compare the oracle designs and propose potential improvements.
