Cap self-serve gate relay timers

services/edge-agent/dist/agent.mjs

@@ -18,6 +18,7 @@ const DEFAULT_UPDATE_VERIFY_INTERVAL_MS = 500;
 const DEFAULT_UPDATE_RESTART_GRACE_MS = 150;
 const DEFAULT_BROKER_RECONNECT_DELAY_MS = 1500;
 const DEFAULT_SHELLY_LOCAL_HTTP_TIMEOUT_MS = 1200;
+const MAX_RELAY_TOGGLE_AFTER_SECONDS = 5;
 const UPDATE_VERIFY_COMMAND = "post-update-verify";
 const execFile = promisify(execFileCallback);
 
@@ -482,7 +483,7 @@ function resolveRelayToggleAfterSeconds(payload = {}) {
     return null;
   }
 
-  return Math.floor(configured);
+  return Math.min(Math.floor(configured), MAX_RELAY_TOGGLE_AFTER_SECONDS);
 }
 
 async function fetchJson(url, fetchImpl = fetch, options = {}) {

services/edge-agent/test/agent.test.mjs

@@ -271,6 +271,31 @@ test("relay switch commands pass timer values to local Shelly APIs", async () =>
     "http://10.1.0.31/rpc/Switch.Set?id=0&on=true&toggle_after=3",
     "http://10.1.0.31/relay/0?turn=on&timer=3",
   ]);
+
+  const cappedUrls = [];
+  const cappedFetch = async (url) => {
+    cappedUrls.push(String(url));
+
+    return {
+      ok: true,
+      async json() {
+        return { output: true };
+      },
+    };
+  };
+
+  await setRelayState({
+    localIp: "10.1.0.31",
+    channel: 0,
+    on: true,
+    toggle_after: 999999999,
+    device_generation: 3,
+  }, cappedFetch);
+
+  assert.equal(
+    cappedUrls[0],
+    "http://10.1.0.31/rpc/Switch.Set?id=0&on=true&toggle_after=5"
+  );
 });
 
 test("runUpdate stages a pending verification restart after installing new artifacts", async () => {