🧘‍♀️Motivation

When interacting with a Verifier it is likely that it wants to get a presentation made up of specific VCs. It is therefore necessary to be able to specify to the wallet the conditions to be applied to the choice of VCs. The following specifications are taken from a minimalist interpretation of the [W3C draft](https://w3c-ccg.github.io/vp-request-spec/#query-by-example)