EndBlocker called every block, update validator set, distribute rewards.

NewAppModule creates a new AppModule Object.

NewHandler returns a handler for "validator" type messages.

NewKeeper creates new instances of the validator Keeper.

NewQuerier is the module level router for state queries.

ParamTable for validator module.

Default parameter namespace.

app module Basics object.

Keeper maintains the link to data storage and exposes getter/setter methods for the various parts of the state machine.