From 51428790ea558f8e34c3034e75d2e49a076261b8 Mon Sep 17 00:00:00 2001
From: Adam Soltys <adam@coinos.io>
Date: Sun, 29 Mar 2026 23:40:15 -0700
Subject: nwc heartbeat

---
 lib/changeid.ts | 13 +++++++------
 lib/nwc.ts      | 29 +++++++++++++++++++++--------
 2 files changed, 28 insertions(+), 14 deletions(-)

diff --git a/lib/changeid.ts b/lib/changeid.ts
index 49d3a0fb..1c6a6688 100644
--- a/lib/changeid.ts
+++ b/lib/changeid.ts
@@ -80,7 +80,7 @@ export default async function changeid(un: string) {
         } else if (k.includes("user:")) {
           await client.del(k);
         } else {
-          await client.rename(k, nk);
+          if (await client.exists(k)) await client.rename(k, nk);
         }
       } catch (e: any) {
         err(`changeid [${label}]`, k, e.message);
@@ -100,17 +100,18 @@ export default async function changeid(un: string) {
   }
   await db.del(`${id}:apps`);
 
-  // Update invoices that reference the old uid
-  for await (const k of db.scanIterator({ MATCH: "invoice:*" })) {
+  // Update uid/aid in invoice objects and their offer pointers
+  const invoiceIds = await db.lRange(`${nid}:invoices`, 0, -1);
+  for (const iid of invoiceIds) {
     try {
-      const inv = await g(k);
+      const inv = await g(`invoice:${iid}`);
       if (!inv || typeof inv === "string") continue;
       let changed = false;
       if (inv.uid === id) { inv.uid = nid; changed = true; }
       if (inv.aid === id) { inv.aid = nid; changed = true; }
       if (changed) {
-        await s(k, inv);
-        l("changeid: updated invoice", k);
+        await s(`invoice:${iid}`, inv);
+        l("changeid: updated invoice", iid);
       }
     } catch (e) {}
   }
diff --git a/lib/nwc.ts b/lib/nwc.ts
index 646ed4b0..d09e6e6c 100644
--- a/lib/nwc.ts
+++ b/lib/nwc.ts
@@ -49,12 +49,30 @@ const nwcRequestTimes: Map<string, number[]> = new Map();
 
 export default () => {
   let r: any;
+  let heartbeatInterval: any;
 
   function connect() {
+    if (heartbeatInterval) clearInterval(heartbeatInterval);
     r = new Relay("ws://sf:7777", { reconnect: false });
 
     r.on("open", async (_) => {
       l("nwc connected to strfry");
+
+      // Periodically check if connection is alive
+      heartbeatInterval = setInterval(() => {
+        try {
+          if (!r?.ws || r.ws.readyState !== 1) {
+            warn("nwc heartbeat: connection dead, reconnecting");
+            clearInterval(heartbeatInterval);
+            try { r.close(); } catch (_) {}
+            setTimeout(connect, 1000);
+          }
+        } catch (_) {
+          warn("nwc heartbeat: error, reconnecting");
+          clearInterval(heartbeatInterval);
+          setTimeout(connect, 1000);
+        }
+      }, 30000);
       r.subscribe("nwc", { kinds: [23194], "#p": [serverPubkey, serverPubkey2], since: Math.floor(Date.now() / 1000) - nwcEventMaxAgeSeconds });
       const info = await finalizeEvent(
         {
@@ -87,6 +105,7 @@ export default () => {
 
     r.on("close", () => {
       warn("nwc strfry connection lost, reconnecting in 5s");
+      if (heartbeatInterval) clearInterval(heartbeatInterval);
       setTimeout(connect, 5000);
     });
 
@@ -147,16 +166,10 @@ export default () => {
         response = await finalizeEvent(response, hexToBytes(sk));
         r.send(["EVENT", response]);
       } catch (e) {
-        // err(
-        //   "problem with nwc",
-        //   pubkey,
-        //   method,
-        //   JSON.stringify(params),
-        //   e.message,
-        // );
+        err("problem with nwc", pubkey, method, e.message);
       }
     } catch (e) {
-      // err("problem with nwc", e.message);
+      err("problem with nwc event", e.message);
     }
   });
   }
-- 
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