chore: add bonjour service and AppleTV device info defaults (#53)

* chore: add bonjour service and appletv device info defaults

* refactor: fix review comments from copilot

* address review comments

* address review comments

* add proper reject and export types in correct way

* adress review comments

* address review comments

Author: harsha509

src/lib/apple-tv/deviceInfo/index.ts

@@ -0,0 +1,48 @@
+import { hostname } from 'node:os';
+
+import { Opack2 } from '../encryption/index.js';
+import type { AppleTVDeviceInfo } from '../types.js';
+
+type OpackSerialized = Buffer;
+
+const DEFAULT_ALT_IRK = Buffer.from([
+  0xe9, 0xe8, 0x2d, 0xc0, 0x6a, 0x49, 0x79, 0x6b, 0x56, 0x6f, 0x54, 0x00, 0x19,
+  0xb1, 0xc7, 0x7b,
+]);
+const DEFAULT_BT_ADDR = '11:22:33:44:55:66';
+const DEFAULT_MAC_BUFFER = Buffer.from([0x11, 0x22, 0x33, 0x44, 0x55, 0x66]);
+const DEFAULT_PAIRING_SERIAL = 'AAAAAAAAAAAA';
+
+/**
+ * Creates a standardized Apple TV device information object with default values
+ * and the specified identifier as the account ID.
+ *
+ * @param identifier - Unique identifier to use as the account ID
+ * @returns Complete Apple TV device information object
+ */
+export function createAppleTVDeviceInfo(identifier: string): AppleTVDeviceInfo {
+  return {
+    altIRK: DEFAULT_ALT_IRK,
+    btAddr: DEFAULT_BT_ADDR,
+    mac: DEFAULT_MAC_BUFFER,
+    remotePairingSerialNumber: DEFAULT_PAIRING_SERIAL,
+    accountID: identifier,
+    model: 'computer-model',
+    name: hostname(),
+  };
+}
+
+/**
+ * Encodes Apple TV device information into a binary buffer using Opack2 serialization.
+ * This creates the device info object and immediately serializes it for transmission.
+ *
+ * @param identifier - Unique identifier to use as the account ID
+ * @returns Serialized device information as a Buffer
+ */
+export function encodeAppleTVDeviceInfo(identifier: string): OpackSerialized {
+  const deviceInfo = createAppleTVDeviceInfo(identifier);
+
+  // Cast to SerializableValue to ensure type compatibility with Opack2.dumps
+  // The AppleTVDeviceInfo structure is compatible with OPACK2 serialization
+  return Opack2.dumps(deviceInfo as Record<string, any>);
+}

src/lib/apple-tv/index.ts

@@ -0,0 +1,19 @@
+// Core exports
+export type {
+  AppleTVDeviceInfo,
+  PairingKeys,
+  PairingResult,
+  PairingConfig,
+  TLV8Item,
+  PairingDataComponentTypeValue,
+  Opack2Value,
+  Opack2Array,
+  Opack2Dictionary,
+} from './types.js';
+export * from './errors.js';
+export * from './constants.js';
+export * from './utils/index.js';
+export * from './deviceInfo/index.js';
+export * from './encryption/index.js';
+export * from './tlv/index.js';
+export * from './srp/index.js';