Substitute

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(lib)substitute

Substitute is a system for modifying code at runtime by substituting custom implementations for arbitrary functions and Objective-C methods. It is also a Free Software (& open-source) substitute for Cydia Substrate.

The library is used in the Electra jailbreak.

Substitute was originally made by comex on January 8th of 2015, but CoolStar has since taken over the project sometime in January of 2018.