Create a new native contract description object by passing a comment, name and a list of member functions descriptions.

Created a new function mounted directly at address (i.e.

Get a new state that wraps the backend but intercepts any calls to natives returning appropriate errors message or an Account sentinel for the particular native.

Context is the first argument to any native function.

Contract is metadata for native contract.

Function is metadata for native functions.

This wrapper provides a state that behaves 'as if' the natives were stored directly in state.