# 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
BeforeDelegationRemoved(Context, AccAddress, ValAddress) error
- called when a delegation is removed

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Events

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The development of the Cosmos SDK is led primarily by Interchain Core Teams. Funding for this development comes primarily from the Interchain Foundation, a Swiss non-profit.