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USM遭遇攻击,损失约70.83枚ETH
2026-08-10 10:51 (UTC+8)
Odaily星球日报讯 USM 合约 defund()赎回函数中的 ethFromDefund()定价逻辑存在缺陷。该函数在单次赎回计算中,采用当前 FUM 卖出价与预估终期 FUM 卖出价的算术平均值核算对价,但该算法不具备拆分不变性。叠加单次赎回附带的状态收缩系数 adjShrinkFactor 与整数取整机制后,同等数量的 FUM 资产拆分为 64 次小额赎回操作,最终可提取的以太坊总量将远高于一次性大额赎回所得。
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