protect contrib endpoint when needed

BTCPayServer/Controllers/AppsPublicController.cs

@@ -107,14 +107,32 @@ namespace BTCPayServer.Controllers
         public async Task<IActionResult> ContributeToCrowdfund(string appId, ContributeToCrowdfund request)
         {
             var app = await _AppsHelper.GetApp(appId, AppType.Crowdfund, true);
-            if (app == null || 
-                (!app.GetSettings<CrowdfundSettings>().Enabled &&
-                 _AppsHelper.GetAppDataIfOwner(GetUserId(), appId, AppType.Crowdfund) == null))
+            
+            if (app == null)
                 return NotFound();
             var settings = app.GetSettings<CrowdfundSettings>();
+            var isAdmin = false;
+            if (!settings.Enabled)
+            {
+                isAdmin = await _AppsHelper.GetAppDataIfOwner(GetUserId(), appId, AppType.Crowdfund) == null;
+                if(!isAdmin)
+                    return NotFound();
+            }
+
+            var info = await _CrowdfundHubStreamer.GetCrowdfundInfo(appId);
+            
+            if(!isAdmin && 
+               ((settings.StartDate.HasValue && DateTime.Now  < settings.StartDate) || 
+                (settings.EndDate.HasValue && DateTime.Now  > settings.EndDate) || 
+                (settings.EnforceTargetAmount && (info.Info.PendingProgressPercentage.GetValueOrDefault(0) + info.Info.ProgressPercentage.GetValueOrDefault(0)) >= 100)))
+            {
+                return NotFound();
+                
+            }
+
             var store = await _AppsHelper.GetStore(app);
-            string title = null;
-            var price = 0.0m;
+            var title =  settings.Title;
+            var price = request.Amount;
             if (!string.IsNullOrEmpty(request.ChoiceKey))
             {
                 var choices = _AppsHelper.Parse(settings.PerksTemplate, settings.TargetCurrency);
@@ -126,12 +144,6 @@ namespace BTCPayServer.Controllers
                 if (request.Amount > price)
                     price = request.Amount;
             }
-            else
-            {
-                price = request.Amount;
-                title = settings.Title;
-            }
-            
             
             store.AdditionalClaims.Add(new Claim(Policies.CanCreateInvoice.Key, store.Id));
             var invoice = await _InvoiceController.CreateInvoiceCore(new Invoice()

BTCPayServer/Crowdfund/CrowdfundHubStreamer.cs

@@ -28,8 +28,6 @@ namespace BTCPayServer.Hubs
         private readonly RateFetcher _RateFetcher;
         private readonly BTCPayNetworkProvider _BtcPayNetworkProvider;
         private readonly InvoiceRepository _InvoiceRepository;
-
-        private Dictionary<string, CancellationTokenSource> _CacheTokens = new Dictionary<string, CancellationTokenSource>();
         public CrowdfundHubStreamer(EventAggregator eventAggregator, 
             IHubContext<CrowdfundHub> hubContext, 
             IMemoryCache memoryCache,
@@ -50,20 +48,12 @@ namespace BTCPayServer.Hubs
 
         public Task<ViewCrowdfundViewModel> GetCrowdfundInfo(string appId)
         {
-            var key = GetCacheKey(appId);
-            return _MemoryCache.GetOrCreateAsync(key, async entry =>
+            return _MemoryCache.GetOrCreateAsync(GetCacheKey(appId), async entry =>
             {           
-                if (_CacheTokens.ContainsKey(key))
-                {
-                    _CacheTokens.Remove(key);
-                }               
                 var app = await _AppsHelper.GetApp(appId, AppType.Crowdfund, true);
                 var result = await GetInfo(app);
                 entry.SetValue(result);
                 
-                var token = new CancellationTokenSource();
-                _CacheTokens.Add(key, token);
-                entry.AddExpirationToken(new CancellationChangeToken(token.Token));
                 TimeSpan? expire = null;
 
                 if (result.StartDate.HasValue && result.StartDate < DateTime.Now)
@@ -87,7 +77,7 @@ namespace BTCPayServer.Hubs
         private void SubscribeToEvents()
         {
             
-            _EventAggregator.Subscribe<InvoiceEvent>(Subscription);
+            _EventAggregator.Subscribe<InvoiceEvent>(OnInvoiceEvent);
             _EventAggregator.Subscribe<AppsController.CrowdfundAppUpdated>(updated =>
             {
                 InvalidateCacheForApp(updated.AppId);
@@ -99,7 +89,7 @@ namespace BTCPayServer.Hubs
             return $"{CrowdfundInvoiceOrderIdPrefix}:{appId}";
         }
 
-        private void Subscription(InvoiceEvent invoiceEvent)
+        private void OnInvoiceEvent(InvoiceEvent invoiceEvent)
         {
             if (!invoiceEvent.Invoice.OrderId.StartsWith(CrowdfundInvoiceOrderIdPrefix, StringComparison.InvariantCultureIgnoreCase))
             {
@@ -128,10 +118,7 @@ namespace BTCPayServer.Hubs
 
         private void InvalidateCacheForApp(string appId)
         {
-            if (_CacheTokens.ContainsKey(appId))
-            {
-                _CacheTokens[appId].Cancel();
-            }
+            _MemoryCache.Remove(GetCacheKey(appId));
 
             GetCrowdfundInfo(appId).ContinueWith(task =>
             {
@@ -210,8 +197,8 @@ namespace BTCPayServer.Hubs
                 EmbeddedCSS = settings.EmbeddedCSS,
                 StoreId = appData.StoreDataId,
                 AppId = appData.Id,
-                StartDate = settings.StartDate, 
-                EndDate = settings.EndDate,
+                StartDate = settings.StartDate?.ToUniversalTime(), 
+                EndDate = settings.EndDate?.ToUniversalTime(),
                 TargetAmount = settings.TargetAmount,
                 TargetCurrency = settings.TargetCurrency,
                 EnforceTargetAmount = settings.EnforceTargetAmount,

BTCPayServer/Views/AppsPublic/Crowdfund/VueCrowdfund.cshtml

@@ -197,8 +197,8 @@
 </script>
 
 <script type="text/x-template" id="perk-template"> 
-<div class="card mb-4 perk"  v-bind:class="{ 'expanded': expanded, 'unexpanded': !expanded }" v-on:click="expand">
-    <div class="perk-zoom " v-if="!expanded && active">
+<div class="card mb-4 perk"  v-bind:class="{ 'expanded': expanded, 'unexpanded': !expanded }" v-on:click="expand" :id="perk.id">
+    <div class="perk-zoom " v-if="canExpand">
         <div class="perk-zoom-bg bg-primary"> </div>
         <div class="perk-zoom-text w-100 text-center text-white font-weight-bold">
             Select this contribution perk
@@ -218,6 +218,7 @@
                     <template v-else-if="!perk.price.value && perk.custom">
                         Any amount
                     </template>
+                    
                 </span>
             </div>
             <p  class="card-text" v-if="perk.description" v-html="perk.description"></p>

BTCPayServer/wwwroot/crowdfund/app.js

@@ -36,6 +36,11 @@ addLoadEvent(function (ev) {
                 expanded: false
             }
         },
+        computed: {
+            canExpand: function(){
+                return !this.expanded && this.active && (this.perk.price.value || this.perk.custom)
+            }
+        },
         methods: {
             onContributeFormSubmit: function (e) {
                 if (e) {
@@ -47,7 +52,7 @@ addLoadEvent(function (ev) {
                 eventAggregator.$emit("contribute", {amount: this.amount, choiceKey: this.choiceKey});
             },
             expand: function(){
-                if(this.active){
+                if(this.canExpand){
                     this.expanded = true;
                 }
             }