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近期大盘的不断下跌，创下过去一年的新低，整个市场都受到了影响，而Defi也是难逃出，数据显示，链上锁仓总量已从 5 月初的 1635 亿美元降至目前的 818 亿美元。
最近场内的金融机构连续暴雷，各大DeFi持续清算还没有结束，很多人，不只是散户投资者，包括很多从业者，都开始怀疑，DeFi到底行不行？
现在在DeFi赛道，应用最开阔的两个方向一个是去中心化借贷，一个则是去中心化交易所。总体来看，MakerDAO、Aave、Compound等龙头项目冷静、守规矩，治理和清算都井井有条；新兴项目如Solend、Maple等新兴项目频频出现情况和问题，暴露了自己的短板，也暴露了自己的定位。领域的弊病。我们也希望这些经验和教训能够为 DeFi 从业者提供参考，推动 DeFi 的进步。产出更优质的Defi的项目。
首先看一下Defi体系中存在哪些问题？
当市场下跌时，DeFi借贷最先面临清算。一些 DeFi 协议在近期的清算中也暴露了几个不容忽视的问题，值得关注：
一是预言机故障，导致清算无法正常进行。
清算等过程都依赖于链上的预言机来获得准确的报价。在 5 月 12 日的 LUNA 崩盘期间，Chainlink 因故障暂停了 LUNA 价格更新，导致借贷协议 Venus 未能及时响应清算，造成超过 1400 万美元的损失。
巧合的是，半个月后，同样的预言机报价漏洞再次出现。5月30日，新Terra链上线。Terra链上最大的借贷协议Anchor上的一个预言机，将LUNC（Luna Classic）的价格误报为5美元（注：LUNC的价格为0.00001美元，新币LUNA为5美元）；平台用户利用报价漏洞套利成功，所幸团队反应及时，最终只损失了80万美元。
无论如何，血淋淋的教训也提醒了 DeFi 协议：选择多个预言机作为报价来源，可以更有效地避免单点故障。
二是清算程序本身设计存在缺陷，未能及时响应。
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