NewDeliverServer constructing deliver.

NewHandlerImpl creates an implementation of the Handler interface.

DeliverServer a polymorphic structure to support generalization of this handler to be able to deliver different type of responses.

DeliverSupport defines the interface a handler must implement for delivery services.

Handler defines an interface which handles Deliver requests.

Support provides the backing resources needed to support deliver on a chain.

SupportManager provides a way for the Handler to look up the Support for a chain.

PolicyChecker checks the envelope against the policy logic supplied by the function.