Your company has decided to create a delivery system to connect users from the consumer market to partners from the logistics business sector.

You are responsible for building a Web API that will be used by partners and users to create, manage and execute deliveries.

• The API should support all CRUD operations (create, read, update, delete).
• A delivery must handle 5 different states: created, approved, completed, cancelled, expired
• Users may approve a delivery before it starts.
• Partner may complete a delivery, that is already in approved state.
• If a delivery is not completed during the access window period, then it should expire.
• Either the partner or the user should be able to cancel a pending delivery (in state created or approved).

A delivery should respect the following structrure:

{
    "state": "created",
    "accessWindow": {
        "startTime": "2019-12-13T09:00:00Z",
        "endTime": "2019-12-13T11:00:00Z"
    },
    "recipient": {
        "name": "John Doe",
        "address": "Merchant Road, London",
        "email": "[email protected]",
        "phoneNumber": "+44123123123"
    },
    "order": {
        "orderNumber": "12209667",
        "sender": "Ikea"
    }
}

• All code should be written in C# and target the .NET core, or .NET framework library version 4.5+.
• Please check all code into a public accessible repository on GitHub and send us a link to your repository.

Feel free to make any assumptions whenever you are not certain about the requirements, but make sure your assumptions are made clear either through the design or additional documentation.

• Application logging
• Documentation
• Containerization
• Authentication
• Testing
• Data storage
• Partner facing Pub/Sub API for receiving state updates.
• Anything else you feel may benefit your solution from a technical perspective.