View seed option if available (#1518)

BTCPayServer/Controllers/StoresController.BTCLike.cs

@@ -26,6 +26,7 @@ using Newtonsoft.Json.Linq;
 using BTCPayServer.Logging;
 using Microsoft.Extensions.Logging;
 using BTCPayServer.Client;
+using NBXplorer;
 
 namespace BTCPayServer.Controllers
 {
@@ -53,6 +54,9 @@ namespace BTCPayServer.Controllers
             {
                 vm.DerivationScheme = derivation.AccountDerivation.ToString();
                 vm.Config = derivation.ToJson();
+                vm.NBXSeedAvailable = (await CanUseHotWallet() ).HotWallet && !string.IsNullOrEmpty(await _ExplorerProvider.GetExplorerClient(network)
+                    .GetMetadataAsync<string>(derivation.AccountDerivation,
+                        WellknownMetadataKeys.Mnemonic));
             }
             vm.Enabled = !store.GetStoreBlob().IsExcluded(new PaymentMethodId(vm.CryptoCode, PaymentTypes.BTCLike));
             var hotWallet = await CanUseHotWallet();
@@ -60,6 +64,50 @@ namespace BTCPayServer.Controllers
             vm.CanUseRPCImport = hotWallet.RPCImport;
             return View(vm);
         }
+        [HttpPost]
+        [Route("{storeId}/derivations/{cryptoCode}/seed")]        
+        [ApiExplorerSettings(IgnoreApi = true)]
+        public async Task<IActionResult> ViewSeed(string storeId, string cryptoCode)
+        {
+            var store = HttpContext.GetStoreData();
+            if (store == null)
+                return NotFound();
+            var network = cryptoCode == null ? null : _ExplorerProvider.GetNetwork(cryptoCode);
+            if (network == null)
+            {
+                return NotFound();
+            }
+            var derivation = GetExistingDerivationStrategy(cryptoCode, store);
+            if (derivation == null)
+            {
+                return NotFound();
+            }
+
+            var canExtract = (await CanUseHotWallet()).HotWallet;
+            
+            var seed = await _ExplorerProvider.GetExplorerClient(network)
+                .GetMetadataAsync<string>(derivation.AccountDerivation,
+                    WellknownMetadataKeys.Mnemonic);
+
+            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(UpdateStore), new { storeId });
+        }
 
         class GetXPubs
         {
@@ -163,6 +211,7 @@ namespace BTCPayServer.Controllers
                 return NotFound();
             }
 
+            vm.NBXSeedAvailable = false;
             vm.Network = network;
             vm.RootKeyPath = network.GetRootKeyPath();
             DerivationSchemeSettings strategy = null;

BTCPayServer/Models/StoreViewModels/DerivationSchemeViewModel.cs

@@ -24,7 +24,7 @@ namespace BTCPayServer.Models.StoreViewModels
         {
             get; set;
         } = new List<(string KeyPath, string Address, RootedKeyPath RootedKeyPath)>();
-
+        public bool NBXSeedAvailable { get; set; }
         public string CryptoCode { get; set; }
         public string KeyPath { get; set; }
         public string RootFingerprint { get; set; }

BTCPayServer/Views/Stores/AddDerivationScheme.cshtml

@@ -55,14 +55,15 @@
                 </div>
             </template>
         }
+
+
+        @if (!Model.Confirmation)
+        {
             <form method="post" asp-action="AddDerivationScheme"
                   asp-route-cryptoCode="@Model.CryptoCode"
                   asp-route-storeId="@this.Context.GetRouteValue("storeId")">
 
                 <input id="Config" asp-for="Config" type="hidden"/>
-
-            @if (!Model.Confirmation)
-            {
                 <input id="CryptoCurrency" asp-for="CryptoCode" type="hidden"/>
                 <input id="DerivationSchemeFormat" asp-for="DerivationSchemeFormat" type="hidden"/>
                 <input id="AccountKey" asp-for="AccountKey" type="hidden"/>
@@ -155,9 +156,21 @@
                     </div>
                 </div>
                 <button name="command" type="submit" class="btn btn-primary" value="save" id="Continue">Continue</button>
+            </form>
+            @if (Model.NBXSeedAvailable)
+            {
+                <form asp-action="ViewSeed" asp-route-cryptoCode="@Model.CryptoCode" asp-route-storeId="@Context.GetRouteValue("storeId")">
+                    <button type="submit" class="btn btn-link">View seed</button>
+                </form>
+            }
         }
         else
         {
+            <form method="post" asp-action="AddDerivationScheme"
+                  asp-route-cryptoCode="@Model.CryptoCode"
+                  asp-route-storeId="@this.Context.GetRouteValue("storeId")">
+
+                <input id="Config" asp-for="Config" type="hidden"/>
                 <div class="form-group">
                     <h5>Confirm the addresses (@Model.CryptoCode)</h5>
                     <span>Please check that your @Model.CryptoCode wallet is generating the same addresses as below.</span>
@@ -185,7 +198,9 @@
                                 <td>@sample.Address</td>
                                 @if (Model.Source == "Vault")
                                 {
-                                        <td><a class="showaddress" href="#" onclick='showAddress(@Safe.Json(sample.RootedKeyPath.ToString()), @Safe.Json(sample.Address)); return false;'>Show on device</a></td>
+                                    <td>
+                                        <a class="showaddress" href="#" onclick='showAddress(@Safe.Json(sample.RootedKeyPath.ToString()), @Safe.Json(sample.Address)); return false;'>Show on device</a>
+                                    </td>
                                 }
                             </tr>
                         }
@@ -203,10 +218,11 @@
                     <span asp-validation-for="HintAddress" class="text-danger"></span>
                 </div>
                 <button name="command" type="submit" class="btn btn-primary" value="save" id="Confirm">Confirm</button>
-            }
             </form>
+        }
     </div>
 </div>
+
 @section Scripts {
     @await Html.PartialAsync("_ValidationScriptsPartial")
     <script src="~/js/ledgerwebsocket.js" type="text/javascript" defer="defer" asp-append-version="true"></script>