feat(device-plane): add typed B2 service ping transport

device-plane/services/device-gateway/test/runtime.test.mjs

@@ -81,7 +81,7 @@ test("telemetry ingress persists HEADER2 before acknowledging packages", async (
     assert.equal(runtime.status().totalDiscoveries, 1);
     assert.equal(runtime.status().totalMessagesAccepted, 1);
     assert.equal(runtime.status().totalPackagesAcknowledged, 1);
-    assert.equal(runtime.status().commandTransport, "disabled");
+    assert.equal(runtime.status().commandTransport, "typed-service-ping-v1");
     assert.equal(runtime.status().publicIngress, "telemetry-ingest");
 
     const response = await fetch(
@@ -91,7 +91,52 @@ test("telemetry ingress persists HEADER2 before acknowledging packages", async (
     assert.equal(body.framing, "verified-read-only");
     assert.equal(body.tcpListener, "telemetry-ingest");
     assert.equal(body.publicIngress, "telemetry-ingest");
-    assert.equal(body.commandTransport, "disabled");
+    assert.equal(body.commandTransport, "typed-service-ping-v1");
+  } finally {
+    client.socket.destroy();
+    await runtime.stop();
+  }
+});
+
+test("dispatches a typed service ping on the next telemetry package and records SERV OK", async () => {
+  const statuses = [];
+  const runtime = createDeviceGatewayRuntime({
+    healthPort: 0,
+    tcpPort: 0,
+    listenEnabled: true,
+    ...gatewayAdapterOptions(),
+    onDiscovery: async () => ({ lifecycleState: "claimed" }),
+    onMessage: async (message) => ({
+      ...acceptanceFor(message),
+      commandOffer: {
+        commandRef: "command:11111111-1111-4111-8111-111111111111",
+        commandType: "service.ping",
+        accessCode: "123456",
+        transportMessageRef: "edge-command:22222222-2222-4222-8222-222222222222",
+      },
+    }),
+    onCommandStatus: async (status) => statuses.push(status),
+  });
+  const addresses = await runtime.start();
+  const client = await connectAndCollect(addresses.tcpAddress.port);
+  try {
+    client.socket.write(Buffer.concat([specificationHeader, specificationPackage]));
+    await client.waitForBytes(28);
+    assert.equal(
+      client.bytes().subarray(13).toString("ascii"),
+      "123456*SERV*1.1",
+    );
+    client.socket.write(Buffer.from("SERV OK", "ascii"));
+    await waitFor(() => statuses.length === 1);
+    assert.deepEqual(statuses[0], {
+      commandRef: "command:11111111-1111-4111-8111-111111111111",
+      transportMessageRef: "edge-command:22222222-2222-4222-8222-222222222222",
+      lifecycleState: "acknowledged",
+      resultCode: "serv_ok",
+      observedAt: statuses[0].observedAt,
+      sessionRef: statuses[0].sessionRef,
+      adapterProfileRef: "arusnavi.b2.internal.v1",
+    });
   } finally {
     client.socket.destroy();
     await runtime.stop();
@@ -319,6 +364,11 @@ function connectAndCollect(port) {
       for (const waiter of waiters.splice(0)) waiter.waitReject(error);
       reject(error);
     });
+    socket.on("close", () => {
+      for (const waiter of waiters.splice(0)) {
+        waiter.waitReject(new Error("device_gateway_test_socket_closed"));
+      }
+    });
   });
 }
 
@@ -339,6 +389,7 @@ function gatewayAdapterOptions() {
     adapterRegistry: DEVICE_ADAPTER_CATALOG.registry,
     protocolProfileRef: DEVICE_ADAPTER_CATALOG.defaultProfileRef,
     edgeRef: "edge:test-001",
+    onCommandStatus: async () => undefined,
   };
 }
 
@@ -352,3 +403,11 @@ function acceptanceFor(message, replayed = false) {
     acceptedAt: "2026-08-11T12:00:00.000Z",
   };
 }
+
+async function waitFor(predicate, timeoutMs = 1_000) {
+  const deadline = Date.now() + timeoutMs;
+  while (!predicate()) {
+    if (Date.now() >= deadline) throw new Error("test_wait_timeout");
+    await new Promise((resolve) => setTimeout(resolve, 5));
+  }
+}