# Hooks

Other modules may register operations to execute when a certain event has occurred within staking. These events can be registered to execute either right `Before` or `After` the staking event (as per the hook name). The following hooks can registered with staking:

* `AfterValidatorCreated(Context, ValAddress) error`
  * called when a validator is created
* `BeforeValidatorModified(Context, ValAddress) error`
  * called when a validator's state is changed
* `AfterValidatorRemoved(Context, ConsAddress, ValAddress) error`
  * called when a validator is deleted
* `AfterValidatorBonded(Context, ConsAddress, ValAddress) error`
  * called when a validator is bonded
* `AfterValidatorBeginUnbonding(Context, ConsAddress, ValAddress) error`
  * called when a validator begins unbonding
* `BeforeDelegationCreated(Context, AccAddress, ValAddress) error`
  * called when a delegation is created
* `BeforeDelegationSharesModified(Context, AccAddress, ValAddress) error`
  * called when a delegation's shares are modified
* `AfterDelegationModified(Context, AccAddress, ValAddress) error`
  * called when a delegation is created or modified
* `BeforeDelegationRemoved(Context, AccAddress, ValAddress) error`
  * called when a delegation is removed