fix the double utxo

Author: dangershony

faucet-api/Controllers/FaucetController.cs

@@ -65,6 +65,12 @@ public FaucetController(IOptions<BitcoinSettings> bitcoinSettings, IIndexerServi
             _indexerService = indexerService ?? throw new ArgumentNullException(nameof(indexerService), "IndexerService is not provided.");
         }
 
+        [HttpGet("send/{address}/{address2}/{amount?}")]
+        public async Task<IActionResult> SendFunds(string address, string address2, long? amount)
+        {
+            return await SendFunds(new SendRequest { ToAddress = address, Amount = amount ?? 20, ToAddress2 = address2, Amount2 = amount ?? 20 });
+        }
+
         [HttpGet("send/{address}/{amount?}")]
         public async Task<IActionResult> SendFunds(string address, long? amount)
         {
@@ -83,6 +89,9 @@ public async Task<IActionResult> SendFunds([FromBody] SendRequest request)
                 var toAddress = BitcoinAddress.Create(request.ToAddress, _network);
                 var amount = Money.Coins(request.Amount);
 
+                BitcoinAddress? toAddress2 = !string.IsNullOrEmpty(request.ToAddress2) ? BitcoinAddress.Create(request.ToAddress2, _network) : null;
+                Money amount2 = Money.Coins(request.Amount2 > 0 ? request.Amount2 : request.Amount);
+
                 var keyPath = new KeyPath($"m/84'/1'/0'/0/{_bitcoinSettings.ChangeAddressIndex}");
                 var privateKey = _masterKey.Derive(keyPath).PrivateKey;
                 var fromAddress = privateKey.PubKey.GetAddress(ScriptPubKeyType.Segwit, _network);
@@ -100,14 +109,18 @@ public async Task<IActionResult> SendFunds([FromBody] SendRequest request)
                 }).Take(2).ToList();
 
                 var txBuilder = _network.CreateTransactionBuilder();
-                var tx = txBuilder
+                var txbuilder = txBuilder
                     .AddCoins(coins)
                     .AddKeys(privateKey)
                     .Send(toAddress, amount)
-                    .Send(toAddress, amount)
                     .SetChange(fromAddress)
-                    .SendFees(Money.Satoshis(_bitcoinSettings.FeeRate))
-                    .BuildTransaction(true);
+                    .SendFees(Money.Satoshis(_bitcoinSettings.FeeRate));
+
+
+                if (toAddress2 != null)
+                    txbuilder.Send(toAddress2, amount2);
+
+                var tx = txbuilder.BuildTransaction(true);
 
                 if (!txBuilder.Verify(tx))
                 {
@@ -207,7 +220,9 @@ public async Task<IActionResult> CheckNetworkStatus()
         public class SendRequest
         {
             public string ToAddress { get; set; }
+            public string ToAddress2 { get; set; }
             public decimal Amount { get; set; }
+            public decimal Amount2 { get; set; }
         }
     }
 }

faucet-api/Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
    <PropertyGroup>
-      <Version>1.0.13</Version>
+      <Version>1.0.14</Version>
       <Authors>Blockcore</Authors>
       <PackageLicenseExpression>MIT</PackageLicenseExpression>
       <PackageProjectUrl>https://github.com/block-core/bitcoin-custom-signet</PackageProjectUrl>

faucet-api/docker-compose.yml

@@ -3,7 +3,7 @@ version: '3.8'
 services:
   faucet-api:
     container_name: faucet-api
-    image: blockcore/faucet-api:1.0.13
+    image: blockcore/faucet-api:1.0.14
     mem_limit: 1024m
     cpus: 0.200
     environment:

package.json

@@ -1,6 +1,6 @@
 {
   "name": "faucet-api",
-  "version": "1.0.13",
+  "version": "1.0.14",
   "description": "Claim free Bitcoin instantly with your Testnet wallet address. Simple and secure!",
   "main": "index.js",
   "scripts": {