Add Blockchair and remove dead Blockonomics

Author: Coding-Enthusiast

WatchOnlyBitcoinWallet/Services/ApiBase.cs

@@ -21,7 +21,7 @@ public enum BalanceServiceNames
     {
         MempoolSpace,
         BlockCypher,
-        Blockonomics,
+        Blockchair,
     }
 
     public abstract class ApiBase

WatchOnlyBitcoinWallet/Services/BalanceServices/Blockchair.cs

@@ -0,0 +1,79 @@
+// WatchOnlyBitcoinWallet
+// Copyright (c) 2016 Coding Enthusiast
+// Distributed under the MIT software license, see the accompanying
+// file LICENCE or http://www.opensource.org/licenses/mit-license.php.
+
+using Autarkysoft.Bitcoin;
+using Newtonsoft.Json.Linq;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading.Tasks;
+using WatchOnlyBitcoinWallet.Models;
+
+namespace WatchOnlyBitcoinWallet.Services.BalanceServices
+{
+    public class Blockchair : ApiBase, IBalanceApi
+    {
+        public async Task<Response> UpdateBalancesAsync(List<BitcoinAddress> addrList)
+        {
+            Response resp = new();
+            string all = string.Join(',', addrList.Select(x => x.Address));
+            string url = $"https://api.blockchair.com/bitcoin/addresses/balances?addresses={all}";
+            Response<JObject> apiResp = await SendApiRequestAsync(url);
+            if (!apiResp.IsSuccess)
+            {
+                resp.Error = apiResp.Error;
+                return resp;
+            }
+            Debug.Assert(apiResp.Result is not null);
+
+            JToken? data = apiResp.Result["data"];
+            if (data is null)
+            {
+                resp.Error = BuildError("data", "blockchair");
+                return resp;
+            }
+
+            List<string> updatedAddrs = new(addrList.Count);
+            foreach (JToken item in data)
+            {
+                string addr = item.Path.Substring("data.".Length);
+                JToken? value = item.First;
+                if (value is null)
+                {
+                    resp.Error = "";
+                    return resp;
+                }
+
+                decimal bal = (ulong)value * Constants.Satoshi;
+                updatedAddrs.Add(addr);
+                BitcoinAddress? address = addrList.Find(x => x.Address == addr);
+                if (address is null)
+                {
+                    resp.Error = $"Blockchair API returned {addr} that was not found in your wallet!";
+                    return resp;
+                }
+                address.Difference = bal - address.Balance;
+                address.Balance = bal;
+            }
+
+            foreach (var item in addrList)
+            {
+                if (!updatedAddrs.Contains(item.Address))
+                {
+                    item.Balance = 0;
+                }
+            }
+
+            resp.IsSuccess = true;
+            return resp;
+        }
+
+        public Task<Response> UpdateTransactionListAsync(List<BitcoinAddress> addrList)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

WatchOnlyBitcoinWallet/Services/BalanceServices/Blockonomics.cs

@@ -194,7 +194,7 @@ private async void GetBalance()
             {
                 BalanceServiceNames.MempoolSpace => new MempoolSpace(),
                 BalanceServiceNames.BlockCypher => new BlockCypher(),
-                BalanceServiceNames.Blockonomics => new Blockonomics(),
+                BalanceServiceNames.Blockchair => new Blockchair(),
                 _ => new BlockCypher(),
             };