overengineered async fix for /lnurlwallet internal hanging.

lnbits/core/tasks.py

@@ -0,0 +1,33 @@
+import asyncio
+from typing import Optional, Awaitable
+from quart import Quart, Request, g
+from werkzeug.datastructures import Headers
+
+from lnbits.db import open_db
+
+main_app: Optional[Quart] = None
+
+
+def grab_app_for_later(state):
+    global main_app
+    main_app = state.app
+
+
+def run_on_pseudo_request(awaitable: Awaitable):
+    async def run(awaitable):
+        fk = Request(
+            "GET",
+            "http",
+            "/background/pseudo",
+            b"",
+            Headers([("host", "lnbits.background")]),
+            "",
+            "1.1",
+            send_push_promise=lambda x, h: None,
+        )
+        async with main_app.request_context(fk):
+            g.db = open_db()
+            await awaitable
+
+    loop = asyncio.get_event_loop()
+    loop.create_task(run(awaitable))