| Implement this to subscribe to events
| generated in validation
|
| Each CValidationInterface() subscriber
| will receive event callbacks in the
| order in which the events were generated
| by validation.
|
| Furthermore, each ValidationInterface()
| subscriber may assume that callbacks
| effectively run in a single thread with
| single-threaded memory consistency.
| That is, for a given ValidationInterface()
| instantiation, each callback will
| complete before the next one is invoked.
| This means, for example when a block
| is connected that the
|
| UpdatedBlockTip() callback may depend
| on an operation performed in the BlockConnected()
| callback without worrying about explicit
| synchronization. No ordering should
| be assumed across
|
| ValidationInterface() subscribers.
|