Why does upgrading my smart contract let me silently corrupt storage that auditors already blessed?
機会
Upgradeable proxy patterns (UUPS, Transparent Proxy, Diamond) are standard in production DeFi but carry a strict constraint: the storage layout of a new implementation must be compatible with every slot assigned by the previous one. Insert a new state variable at the wrong position and every subsequent slot is corrupted silently, with no on-chain error. Automated checkers like OpenZeppelin's upgrade plugin catch naive cases but miss ERC-7201 namespaced storage with custom packing, assembly-level slot assignments, and Diamond facet cross-collision where two facets claim the same storage region. A January 2026 peer-reviewed study (ProxyLens) found a significant class of inter-facet collision vulnerabilities that existing tools do not detect. Auditors review implementation contracts in isolation and cannot reconstruct the full storage map of a proxy with multiple delegated facets.
重要な理由
A tool that builds a complete, version-diffed storage map across all proxy and implementation contracts would turn a class of silent data corruption into a blocked deployment.
機会をどう評価するか
Opportunity Scoreは測定値ではなく、私自身の見解です。どれほど痛みを伴うか、どれほど頻繁に影響を与えるか、そして今日時点で解決策がいかに少ないか。スコアが高いほど、構築する価値が高いと私は考えています。
それが現れたときにどれほどの痛みをもたらすか。
実際にどれほど頻繁に人々がそれに直面するか。
今日時点で、それに対する優れたツールがいかに少ないか。