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pallet-staking: Converts all math operations to safe (#2435)

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This PR converts unsafe math operations to safe in the staking pallet.
 
Closes https://github.com/paritytech/polkadot-sdk/issues/2431

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Co-authored-by: Ankan <10196091+Ank4n@users.noreply.github.com>
This commit is contained in:
Gonçalo Pestana
2023-11-24 10:36:22 +01:00
committed by GitHub
parent 4163152506
commit f086d540ae
4 changed files with 33 additions and 23 deletions
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substrate/frame/staking/src/pallet/mod.rs
+3 -1
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@@ -1068,7 +1068,9 @@ pub mod pallet {
ensure!(ledger.active >= min_active_bond, Error::<T>::InsufficientBond);
// Note: in case there is no current era it is fine to bond one era more.
let era = Self::current_era().unwrap_or(0) + T::BondingDuration::get();
let era = Self::current_era()
.unwrap_or(0)
.defensive_saturating_add(T::BondingDuration::get());
if let Some(chunk) = ledger.unlocking.last_mut().filter(|chunk| chunk.era == era) {
// To keep the chunk count down, we only keep one chunk per era. Since
// `unlocking` is a FiFo queue, if a chunk exists for `era` we know that it will