Description

This PR adds the PrepareFetch method to the Client interface definition. It also separates the concerns of fetching vs pushing by breaking out two new interfaces from the Client interface called Fetcher and Pusher.

Fixes #244

Type of change

• Refactor

How Has This Been Tested?

• Unit/e2e tests

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings