feat(edge): support connection tokens when starting an edge and add token encode/decode utilities

test/test.ts

@@ -9,4 +9,53 @@ tap.test('should export RemoteIngressEdge', async () => {
   expect(remoteingress.RemoteIngressEdge).toBeTypeOf('function');
 });
 
+tap.test('should export encodeConnectionToken and decodeConnectionToken', async () => {
+  expect(remoteingress.encodeConnectionToken).toBeTypeOf('function');
+  expect(remoteingress.decodeConnectionToken).toBeTypeOf('function');
+});
+
+tap.test('should roundtrip encode → decode a connection token', async () => {
+  const data: remoteingress.IConnectionTokenData = {
+    hubHost: 'hub.example.com',
+    hubPort: 8443,
+    edgeId: 'edge-001',
+    secret: 'super-secret-key',
+  };
+  const token = remoteingress.encodeConnectionToken(data);
+  const decoded = remoteingress.decodeConnectionToken(token);
+  expect(decoded.hubHost).toEqual(data.hubHost);
+  expect(decoded.hubPort).toEqual(data.hubPort);
+  expect(decoded.edgeId).toEqual(data.edgeId);
+  expect(decoded.secret).toEqual(data.secret);
+});
+
+tap.test('should throw on malformed token', async () => {
+  let error: Error | undefined;
+  try {
+    remoteingress.decodeConnectionToken('not-valid-json!!!');
+  } catch (e) {
+    error = e as Error;
+  }
+  expect(error).toBeInstanceOf(Error);
+  expect(error!.message).toInclude('Invalid connection token');
+});
+
+tap.test('should throw on token with missing fields', async () => {
+  // Encode a partial object (missing 'p' and 's')
+  const partial = Buffer.from(JSON.stringify({ h: 'host', e: 'edge' }), 'utf-8')
+    .toString('base64')
+    .replace(/\+/g, '-')
+    .replace(/\//g, '_')
+    .replace(/=+$/, '');
+
+  let error: Error | undefined;
+  try {
+    remoteingress.decodeConnectionToken(partial);
+  } catch (e) {
+    error = e as Error;
+  }
+  expect(error).toBeInstanceOf(Error);
+  expect(error!.message).toInclude('missing required fields');
+});
+
 export default tap.start();