In *Spider-Man: Homecoming*, 

> 
>  Tony Stark gives Peter Parker a highly upgraded Spider-Man suit, including many new web shooting protocols. 
> 
> 
> 

**How did Tony know the formula for making the webs?** I thought that the formula was a secret that Peter's father had hidden from OsCorp at the cost of his own life. 

Is Stark doing anything else with the web formula? 

I know that back stories get rewritten often, but this seems to conflict with long-standing explanations. What is the new back story?