Does anyone have a saved link to the answer to the question about the temporary effects of potions and scrolls?

Question

Game development

A long time ago, one dude asked about the correct implementation of temporary effects in the game: how to make buffs, debuffs, potions, scrolls, etc.
This question was answered well with the mechanics of how consumables work and the calculation of values ​​based on the character's base / modified parameter.
Help me find this answer.