Interview

Welcome

Thanks for cloning this project. This project is mean for conducting a technical interview for C# developers.
Good luck 🤞

How to submit

There are a few ways you can submit your answers:

Zip and send the code back to the contacting HR.
Just post your forked project link to HR.

Backgrounds

Pricing

You are provided （you dont need to implement） a .net standard library that mock a pricing system. The api simulated getting prices from external services.
See the diagram below:

The library has a class named “TradingApi” which implement interface:

public interface ITradingApi
{
    /// <summary>
    /// Get full list of symbol definitions, only two symbols are supported: “AUDUSD” and “CL-OIL”.
    /// </summary>
    /// <returns>Symbols</returns>
    IEnumerable<Symbol> GetSymbols();

    /// <summary>
    /// If there is an in-coming price and the symbol of the price is subscribed by SubscribeSymbol <see cref="SubscribeSymbol"/> an event will fire, the pricing data is passed as event data.
    /// </summary>
    event EventHandler<Price> OnPricing;

    /// <summary>
    /// Subscribe a symbol to receive prices though OnPricing event handler
    /// </summary>
    /// <param name="symbolName">name of a symbol</param>
    void SubscribeSymbol(string symbolName);
}

public struct Price
{
    public string Symbol { get; }
    public decimal Bid { get; }
    public decimal Ask { get; }
    public DateTime Time { get; }
}

public class Symbol
{
    public string Name { get; set; }
    public string BaseCurrency { get; set; }
    public int Digits { get; set; }
}

public class PriceStats
{
    public decimal Open { get; set; }
    public decimal Close { get; set; }
    public decimal Min { get; set; }
    public decimal Max { get; set; }
}

Tasks

You tasks are to complete these controllers and services to full fill the following requirements. The controllers and services are already created created,