fix(telegram): keep webhook monitor alive until abort

Co-authored-by: Evgeny Zislis <7056+kesor@users.noreply.github.com>

src/telegram/monitor.test.ts

@@ -286,6 +286,25 @@ describe("monitorTelegramProvider (grammY)", () => {
     expect(runSpy).not.toHaveBeenCalled();
   });
 
+  it("webhook mode waits for abort signal before returning", async () => {
+    const abort = new AbortController();
+    const settled = vi.fn();
+    const monitor = monitorTelegramProvider({
+      token: "tok",
+      useWebhook: true,
+      webhookUrl: "https://example.test/telegram",
+      webhookSecret: "secret",
+      abortSignal: abort.signal,
+    }).then(settled);
+
+    await Promise.resolve();
+    expect(settled).not.toHaveBeenCalled();
+
+    abort.abort();
+    await monitor;
+    expect(settled).toHaveBeenCalledTimes(1);
+  });
+
   it("falls back to configured webhookSecret when not passed explicitly", async () => {
     await monitorTelegramProvider({
       token: "tok",

src/telegram/monitor.ts

@@ -178,6 +178,15 @@ export async function monitorTelegramProvider(opts: MonitorTelegramOpts = {}) {
         abortSignal: opts.abortSignal,
         publicUrl: opts.webhookUrl,
       });
+      if (opts.abortSignal && !opts.abortSignal.aborted) {
+        await new Promise<void>((resolve) => {
+          const onAbort = () => {
+            opts.abortSignal?.removeEventListener("abort", onAbort);
+            resolve();
+          };
+          opts.abortSignal.addEventListener("abort", onAbort, { once: true });
+        });
+      }
       return;
     }