program: Fix fee check#790
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#### Problem The fee check is using `map` instead of `and_then`, allowing for an incorrect comparison between `Option::Some(...)` and `Option::None`. #### Summary of changes Use `and_then` instead to compare numbers instead of options.
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Problem
The fee check is using
mapinstead ofand_then, allowing for an incorrect comparison betweenOption::Some(...)andOption::None.Summary of changes
Use
and_theninstead to compare numbers instead of options.This fix was included in the most recent deployment of the stake pool program, part of https://github.com/solana-program/stake-pool/releases/tag/program%40v2.1.0, and now it's time to re-integrate it into the main branch.