Importing ShopifyApiClient for interactions with Shopify Api

BTCPayServer/Services/Shopify/ShopifyApiClient.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Text;
+using System.Threading.Tasks;
+using DBriize.Utils;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Services.Shopify
+{
+    public class ShopifyApiClient
+    {
+        private readonly HttpClient _httpClient;
+        private readonly ILogger _logger;
+        private readonly ShopifyApiClientCredentials _creds;
+
+        public ShopifyApiClient(IHttpClientFactory httpClientFactory, ILogger logger, ShopifyApiClientCredentials creds)
+        {
+            if (httpClientFactory != null)
+            {
+                _httpClient = httpClientFactory.CreateClient(nameof(ShopifyApiClient));
+            }
+            else // tests don't provide IHttpClientFactory
+            {
+                _httpClient = new HttpClient();
+            }
+            _logger = logger;
+            _creds = creds;
+
+            var bearer = $"{creds.ApiKey}:{creds.ApiPassword}";
+            bearer = Encoding.UTF8.GetBytes(bearer).ToBase64String();
+
+            _httpClient.DefaultRequestHeaders.Add("Authorization", "Basic " + bearer);
+        }
+
+        public async Task<dynamic> TransactionsList(string orderId)
+        {
+            var req = createRequest(_creds.ShopName, HttpMethod.Get, $"orders/{orderId}/transactions.json");
+
+            var strResp = await sendRequest(req);
+
+            dynamic parsed = JObject.Parse(strResp);
+
+            return parsed;
+        }
+
+        public async Task<dynamic> TransactionCreate(string orderId, TransactionCreate txnCreate)
+        {
+            var postJson = JsonConvert.SerializeObject(txnCreate);
+
+            var req = createRequest(_creds.ShopName, HttpMethod.Post, $"orders/{orderId}/transactions.json");
+            req.Content = new StringContent(postJson, Encoding.UTF8, "application/json");
+
+            var strResp = await sendRequest(req);
+            return JObject.Parse(strResp);
+        }
+
+        private HttpRequestMessage createRequest(string shopNameInUrl, HttpMethod method, string action)
+        {
+            var url = $"https://{shopNameInUrl}.myshopify.com/admin/api/2020-07/" + action;
+
+            var req = new HttpRequestMessage(method, url);
+
+            return req;
+        }
+
+        private async Task<string> sendRequest(HttpRequestMessage req)
+        {
+            using var resp = await _httpClient.SendAsync(req);
+
+            var strResp = await resp.Content.ReadAsStringAsync();
+            return strResp;
+        }
+    }
+
+    public class ShopifyApiClientCredentials
+    {
+        public string ShopName { get; set; }
+        public string ApiKey { get; set; }
+        public string ApiPassword { get; set; }
+        public string SharedSecret { get; set; }
+    }
+
+    public class TransactionCreate
+    {
+        public DataHolder transaction { get; set; }
+
+        public class DataHolder
+        {
+            public string currency { get; set; }
+            public string amount { get; set; }
+            public string kind { get; set; }
+            public string parent_id { get; set; }
+            public string gateway { get; set; }
+            public string source { get; set; }
+        }
+    }
+}