Getting All Available Currencies

GradDemo.Api/Controllers/CryptoController.cs

@@ -44,5 +44,14 @@ public async Task<Response<CryptoCoinResponse>> GetCoin(string coinId, string cu
 
             return Response<CryptoCoinResponse>.Error("Something went wrong");
         }
+
+        [HttpGet("available/currencies")]
+        public async Task<string?[]> GetCurrencies()
+        {
+
+            var res = await _coinGeckoProvider.GetAllCurrencies();
+
+            return res;
+        }
     }
 }

GradDemo.Api/Providers/CoinGeckoProvider.cs

@@ -1,4 +1,5 @@
-using GradDemo.Api.Models.CoinGecko;
+using GradDemo.Api.Models;
+using GradDemo.Api.Models.CoinGecko;
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
@@ -43,5 +44,23 @@ public CoinGeckoProvider(string baseUrl)
 
             return null;
         }
+
+        public async Task<string?[]> GetAllCurrencies()
+        {
+
+            string url = "api/v3/simple/supported_vs_currencies";
+            HttpResponseMessage response = await client.GetAsync(url);
+            if (response.IsSuccessStatusCode)
+            {
+                string res = await response.Content.ReadAsStringAsync();
+
+                var coinGeckoResult = JsonConvert.DeserializeObject<string?[]>(res);
+
+
+                return coinGeckoResult;
+            }
+
+            return null;
+        }
     }
 }