# 【链上膜法】(二)存储插槽、读取private变量、delegatecall、可升级合约

By [Derrick(⚚,⚚)](https://paragraph.com/@derrick-3) · 2022-05-01

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*Originally published on [Derrick(⚚,⚚)](https://paragraph.com/@derrick-3/private-delegatecall)*