# Hooks

# Create or modify delegation distribution

• triggered-by: staking.MsgDelegate, staking.MsgBeginRedelegate, staking.MsgUndelegate

The pool of a new delegator bond will be 0 for the height at which the bond was added, or the withdrawal has taken place. This is achieved by setting DelegationDistInfo.WithdrawalHeight to the height of the triggering transaction.

# Commission rate change

• triggered-by: staking.MsgEditValidator

If a validator changes its commission rate, all commission on fees must be simultaneously withdrawn using the transaction TxWithdrawValidator. Additionally the change and associated height must be recorded in a ValidatorUpdate state record.

# Change in Validator State

• triggered-by: staking.Slash, staking.UpdateValidator

Whenever a validator is slashed or enters/leaves the validator group all of the validator entitled reward tokens must be simultaneously withdrawn from Global.Pool and added to ValidatorDistInfo.Pool.