Historical retrospective · DeFi
Oracle design became a central DeFi security lesson
DeFi contracts often rely on external price feeds because blockchains cannot independently observe off-chain market prices.
Manipulated or stale prices can cascade into borrowing, liquidation and trading failures even when the underlying token contracts behave as coded.
Oracle design emerged as a critical security boundary across lending and derivatives protocols.
Users and builders should ask how a protocol sources, updates and bounds price data, especially in thin or volatile markets.
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