Exchange Rate Provider - Alberto Salas Hernandez

[s414s]

Implementation of exchange rate provider for CNB data source.

Main features:

• Currency class turned into a record type for value comparison
• Cached results to avoid getting rate-limited by the data provider
• Abstraction of the exchange rate provider through an interface for decoupling purposes and to allow multiple future implementations
• Registration of exchange rate provider by key to support access to any of the implemented providers via strategy-pattern-like injection.
• Resiliency implemented for api calls to third-party data providers