klhztrader/KLHZ.Trader.Service/Controllers/ExchangeDataController.cs

using Grpc.Core;
using Microsoft.AspNetCore.Mvc;
using Tinkoff.InvestApi;
using Tinkoff.InvestApi.V1;

namespace KLHZ.Trader.Service.Controllers
{
    [ApiController]
    [Route("[controller]/[action]")]
    public class ExchangeDataController : ControllerBase
    {
        private readonly InvestApiClient _investApiClient;

        public ExchangeDataController(InvestApiClient investApiClient)
        {
            _investApiClient = investApiClient;
        }

        [HttpGet]
        public async Task<string?> GetFigi([FromQuery] string ticker, [FromQuery] string? classCode = "TQBR")
        {
            var req = new InstrumentRequest()
            {
                ClassCode = classCode,
                IdType = InstrumentIdType.Ticker,
                Id = ticker,
            };

            try
            {
                var res = await _investApiClient.Instruments.GetInstrumentByAsync(req);
                return res.Instrument.Figi;
            }
            catch (RpcException ex)
            {
                if (ex.StatusCode == Grpc.Core.StatusCode.NotFound && classCode == "TQBR")
                {
                    return await GetFigi(ticker, "SPBFUT");
                }
            }
            return null;
        }

        [HttpGet]
        public async Task<string?> GetTicker([FromQuery] string figi)
        {
            var req = new InstrumentRequest()
            {
                ClassCode = "figi",
                IdType = InstrumentIdType.Figi,
                Id = figi,
            };

            try
            {
                var res = await _investApiClient.Instruments.GetInstrumentByAsync(req);
                return res.Instrument.Ticker;
            }
            catch (Exception ex)
            {

            }
            return null;
        }
    }
}