fix: resolve notification email, asset filter, metrics, and recurring…

backend/src/app.ts

@@ -38,6 +38,7 @@ import {
 import { processPendingWebhookDeliveries } from "./services/webhook-processor.js";
 import { getIsRedisAvailable } from "./services/redis.js";
 import { enqueueWebhookDelivery } from "./services/webhook-queue.js";
+import { addMonths } from "./services/drip-scheduler.js";
 import { sanitizeBody, sanitizeQuery } from "./middleware/sanitize.js";
 import { CircuitBreaker, type CircuitBreakerStorage, type State } from "./services/circuit-breaker.js";
 import {
@@ -4272,11 +4273,11 @@ All errors return JSON with an \`error\` field and optional \`code\`:
     const user = await prisma.user.findFirst({ where: { email: req.auth!.walletAddress } });
     if (!user) return sendError(res, 401, "User not found");
 
-    const nextRunAt = new Date();
+    let nextRunAt: Date;
     if (frequency === "weekly") {
-      nextRunAt.setDate(nextRunAt.getDate() + 7);
+      nextRunAt = new Date(Date.now() + 7 * 24 * 60 * 60 * 1000);
     } else {
-      nextRunAt.setDate(nextRunAt.getDate() + 30);
+      nextRunAt = addMonths(new Date(), 1);
     }
 
     await prisma.recurringSupport.create({
@@ -4379,11 +4380,10 @@ All errors return JSON with an \`error\` field and optional \`code\`:
     // Recalculate nextRunAt when frequency changes
     let nextRunAt: Date | undefined;
     if (frequency) {
-      nextRunAt = new Date();
       if (frequency === "weekly") {
-        nextRunAt.setDate(nextRunAt.getDate() + 7);
+        nextRunAt = new Date(Date.now() + 7 * 24 * 60 * 60 * 1000);
       } else {
-        nextRunAt.setDate(nextRunAt.getDate() + 30);
+        nextRunAt = addMonths(new Date(), 1);
       }
     }
 

backend/src/metrics.ts

@@ -1,5 +1,11 @@
 // Prometheus-compatible metrics registry for background service health monitoring.
 // Exposes counters, gauges, and histograms in OpenMetrics text format.
+//
+// ⚠️  LIMITATION: This in-memory registry resets on process restart and is not
+// suitable for multi-instance deployments. Metric values reflect only the
+// current instance's state since last restart. For production deployments with
+// multiple instances or persistent monitoring, use a proper Prometheus client
+// library (e.g., prom-client) with persistent storage and cluster-aware aggregation.
 
 type MetricValue = number;
 

backend/src/services/drip-scheduler.ts

@@ -5,7 +5,7 @@ import { Metrics } from "../metrics.js";
 
 const DRIP_BATCH_SIZE = 100;
 
-function addMonths(date: Date, months: number): Date {
+export function addMonths(date: Date, months: number): Date {
   const result = new Date(date);
   const targetMonth = result.getMonth() + months;
   result.setMonth(targetMonth);

backend/src/services/email.ts

@@ -26,12 +26,13 @@ export async function sendSupportReceivedEmail({
   txHash,
 }: SendSupportReceivedEmailParams): Promise<void> {
   const subject = `You received ${amount} ${assetCode} on NovaSupport`;
-  
-  const truncatedAddress = fromAddress.length > 8 
+
+  const truncatedAddress = fromAddress.length > 8
     ? `${fromAddress.slice(0, 4)}...${fromAddress.slice(-4)}`
     : fromAddress;
 
-  const stellarExpertLink = `https://stellar.expert/explorer/testnet/tx/${txHash}`;
+  const network = process.env.STELLAR_NETWORK === "PUBLIC" ? "public" : "testnet";
+  const stellarExpertLink = `https://stellar.expert/explorer/${network}/tx/${txHash}`;
 
   const html = `
     <h2>You've received support!</h2>

frontend/src/app/explore/page.tsx

@@ -17,7 +17,7 @@ type Profile = {
 };
 
 type SortOption = "newest" | "most_supported" | "most_transactions";
-type AssetFilter = "all" | "XLM" | "USDC";
+type AssetFilter = string;
 
 export default function ExplorePage() {
   const [profiles, setProfiles] = useState<Profile[]>([]);
@@ -26,6 +26,7 @@ export default function ExplorePage() {
   const [sort, setSort] = useState<SortOption>("newest");
   const [asset, setAsset] = useState<AssetFilter>("all");
   const [assetIssuer, setAssetIssuer] = useState<string>("");
+  const [availableAssets, setAvailableAssets] = useState<string[]>([]);
   const [availableIssuers, setAvailableIssuers] = useState<
     Array<{ code: string; issuer: string }>
   >([]);
@@ -49,14 +50,18 @@ export default function ExplorePage() {
   }, [sort, asset, assetIssuer]);
 
   useEffect(() => {
+    const assetCodes = new Set<string>();
     const issuers = new Set<string>();
     profiles.forEach((p) => {
       p.acceptedAssets.forEach((a) => {
+        assetCodes.add(a.code);
         if (a.issuer) {
           issuers.add(`${a.code}:${a.issuer}`);
         }
       });
     });
+    const uniqueAssets = Array.from(assetCodes).sort();
+    setAvailableAssets(uniqueAssets);
     const unique = Array.from(issuers)
       .map((str) => {
         const [code, issuer] = str.split(":");
@@ -158,14 +163,17 @@ export default function ExplorePage() {
             <select
               value={asset}
               onChange={(e) => {
-                setAsset(e.target.value as AssetFilter);
+                setAsset(e.target.value);
                 setAssetIssuer("");
               }}
               className="rounded-xl border border-white/10 bg-white/5 px-4 py-2 text-sm text-white focus:border-mint/50 focus:outline-none"
             >
               <option value="all">All</option>
-              <option value="XLM">XLM</option>
-              <option value="USDC">USDC</option>
+              {availableAssets.map((code) => (
+                <option key={code} value={code}>
+                  {code}
+                </option>
+              ))}
             </select>
           </div>