Add View seed to wallet settings

BTCPayServer/Controllers/WalletsController.cs

@@ -1137,7 +1137,10 @@ namespace BTCPayServer.Controllers
                 Label = derivationSchemeSettings.Label,
                 DerivationScheme = derivationSchemeSettings.AccountDerivation.ToString(),
                 DerivationSchemeInput = derivationSchemeSettings.AccountOriginal,
-                SelectedSigningKey = derivationSchemeSettings.SigningKey.ToString()
+                SelectedSigningKey = derivationSchemeSettings.SigningKey.ToString(),
+                NBXSeedAvailable = await CanUseHotWallet() && !string.IsNullOrEmpty(await ExplorerClientProvider.GetExplorerClient(walletId.CryptoCode)
+                    .GetMetadataAsync<string>(GetDerivationSchemeSettings(walletId).AccountDerivation,
+                        WellknownMetadataKeys.MasterHDKey))
             };
             vm.AccountKeys = derivationSchemeSettings.AccountKeySettings
                             .Select(e => new WalletSettingsAccountKeyViewModel()
@@ -1153,7 +1156,8 @@ namespace BTCPayServer.Controllers
         [HttpPost]
         public async Task<IActionResult> WalletSettings(
             [ModelBinder(typeof(WalletIdModelBinder))]
-            WalletId walletId, WalletSettingsViewModel vm, string command = "save", CancellationToken cancellationToken = default)
+            WalletId walletId, WalletSettingsViewModel vm, string command = "save",
+            CancellationToken cancellationToken = default)
         {
             if (!ModelState.IsValid)
                 return View(vm);
@@ -1164,14 +1168,21 @@ namespace BTCPayServer.Controllers
             if (command == "save")
             {
                 derivationScheme.Label = vm.Label;
-                derivationScheme.SigningKey = string.IsNullOrEmpty(vm.SelectedSigningKey) ? null : new BitcoinExtPubKey(vm.SelectedSigningKey, derivationScheme.Network.NBitcoinNetwork);
+                derivationScheme.SigningKey = string.IsNullOrEmpty(vm.SelectedSigningKey)
+                    ? null
+                    : new BitcoinExtPubKey(vm.SelectedSigningKey, derivationScheme.Network.NBitcoinNetwork);
                 for (int i = 0; i < derivationScheme.AccountKeySettings.Length; i++)
                 {
-                    derivationScheme.AccountKeySettings[i].AccountKeyPath = string.IsNullOrWhiteSpace(vm.AccountKeys[i].AccountKeyPath) ? null
+                    derivationScheme.AccountKeySettings[i].AccountKeyPath =
+                        string.IsNullOrWhiteSpace(vm.AccountKeys[i].AccountKeyPath)
+                            ? null
                             : new KeyPath(vm.AccountKeys[i].AccountKeyPath);
-                    derivationScheme.AccountKeySettings[i].RootFingerprint = string.IsNullOrWhiteSpace(vm.AccountKeys[i].MasterFingerprint) ? (HDFingerprint?)null
+                    derivationScheme.AccountKeySettings[i].RootFingerprint =
+                        string.IsNullOrWhiteSpace(vm.AccountKeys[i].MasterFingerprint)
+                            ? (HDFingerprint?)null
                             : new HDFingerprint(Encoders.Hex.DecodeData(vm.AccountKeys[i].MasterFingerprint));
                 }
+
                 var store = (await Repository.FindStore(walletId.StoreId, GetUserId()));
                 store.SetSupportedPaymentMethod(derivationScheme);
                 await Repository.UpdateStore(store);
@@ -1180,15 +1191,41 @@ namespace BTCPayServer.Controllers
             }
             else if (command == "prune")
             {
-                var result = await ExplorerClientProvider.GetExplorerClient(walletId.CryptoCode).PruneAsync(derivationScheme.AccountDerivation, new PruneRequest(),  cancellationToken);
+                var result = await ExplorerClientProvider.GetExplorerClient(walletId.CryptoCode)
+                    .PruneAsync(derivationScheme.AccountDerivation, new PruneRequest(), cancellationToken);
                 if (result.TotalPruned == 0)
                 {
                     TempData[WellKnownTempData.SuccessMessage] = $"The wallet is already pruned";
                 }
                 else
                 {
-                    TempData[WellKnownTempData.SuccessMessage] = $"The wallet has been successfully pruned ({result.TotalPruned} transactions have been removed from the history)";
+                    TempData[WellKnownTempData.SuccessMessage] =
+                        $"The wallet has been successfully pruned ({result.TotalPruned} transactions have been removed from the history)";
                 }
+
+                return RedirectToAction(nameof(WalletSettings));
+            }
+            else if (command == "view-seed" && await CanUseHotWallet())
+            {
+                var seed =  await ExplorerClientProvider.GetExplorerClient(walletId.CryptoCode)
+                    .GetMetadataAsync<string>(derivationScheme.AccountDerivation,
+                        WellknownMetadataKeys.Mnemonic, cancellationToken);
+                if (string.IsNullOrEmpty(seed))
+                {
+                    TempData.SetStatusMessageModel(new StatusMessageModel()
+                    {
+                        Severity = StatusMessageModel.StatusSeverity.Error, Message = "The seed was not found"
+                    });
+                }
+                else
+                {
+                    TempData.SetStatusMessageModel(new StatusMessageModel()
+                    {
+                        Severity = StatusMessageModel.StatusSeverity.Success,
+                        Html = $"Please store your seed securely! <br/><code class=\"alert-link\">{seed}</code>"
+                    });
+                }
+                
                 return RedirectToAction(nameof(WalletSettings));
             }
             else
@@ -1197,8 +1234,6 @@ namespace BTCPayServer.Controllers
             }
         }
 
-
-
         private string GetImage(PaymentMethodId paymentMethodId, BTCPayNetwork network)
         {
             var res = paymentMethodId.PaymentType == PaymentTypes.BTCLike

BTCPayServer/Models/WalletViewModels/WalletSettingsViewModel.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
@@ -16,6 +16,7 @@ namespace BTCPayServer.Models.WalletViewModels
         public bool IsMultiSig => AccountKeys.Count > 1;
 
         public List<WalletSettingsAccountKeyViewModel> AccountKeys { get; set; } = new List<WalletSettingsAccountKeyViewModel>();
+        public bool NBXSeedAvailable { get; set; }
     }
 
     public class WalletSettingsAccountKeyViewModel

BTCPayServer/Views/Wallets/WalletSettings.cshtml

@@ -76,6 +76,10 @@
                     </button>
                     <div class="dropdown-menu" aria-labelledby="SendMenu">
                         <button name="command" type="submit" class="dropdown-item" value="prune">Prune old transactions from history</button>
+                        @if (Model.NBXSeedAvailable)
+                        {
+                            <button name="command" type="submit" class="dropdown-item" value="view-seed">View seed</button>
+                        }
                     </div>
                 </div>
             </div>