title: "Fixes a scenario where a nomination pool's `TotalValueLocked` is out of sync due to staking's implicit withdraw"

doc:
  - audience: Runtime Dev
    description: |
      The nomination pools pallet `TotalValueLocked` may get out of sync if the staking pallet
      does implicit withdrawal of unlocking chunks belonging to a bonded pool stash. This fix
      is based on a new method on the `OnStakingUpdate` traits, `on_withdraw`, which allows the
      nomination pools pallet to adjust the `TotalValueLocked` every time there is an implicit or
      explicit withdrawal from a bonded pool's stash.

crates: 
  - name: "pallet-nomination-pools"
  - name: "pallet-staking"
  - name: "sp-staking"