[API]: Create party fees & discounts by market API

[JonRay15]

API Overview

In order to ... give users a clear view on their fees and discounts across all markets
We will build an API to... provide that
So that ... they can

Specs

Spec name to spec or section within a spec

Inputs

• Party ID
• Market ID list (optional ... if none provided show all active markets)

Outputs

• The volume discount tier
• The referral discount tier
• The maker rebate boost thing tier
• For each market
  • Undiscounted taker fee percent
  • Discounted taker fee percent
  • The base maker rebate
  • The user's final maker rebate

NB: We must be able to easily read between the tiers on this API and the tiers on the reference tiers APIs. Therefore suggest in addition to adding the tier number here we also:

• Add tier number to volume discount program API
• Add tier number to referral discount program API
• Add tier number to maker rebate program API

Questions

Open questions about the feature implementation, what can be done with the APIs, or currently unresolved questions around the feature.

API test scenarios

Detailed scenarios that can be executed as feature tests to verify that the API has been implemented as expected.

Additional Details (optional)

Any additional information that provides context or gives information that will help us develop the feature.