migrate to sqlalchemy-aio.

a big refactor that:

- fixes some issues that might have happened (or not) with asynchronous
    reactions to payments;
- paves the way to https://github.com/lnbits/lnbits/issues/121;
- uses more async/await notation which just looks nice; and
- makes it simple(r?) for one extension to modify stuff from other extensions.

lnbits/extensions/lnurlp/views_api.py

@@ -5,7 +5,7 @@ from lnurl.exceptions import InvalidUrl as LnurlInvalidUrl  # type: ignore
 from lnbits.core.crud import get_user
 from lnbits.decorators import api_check_wallet_key, api_validate_post_request
 
-from lnbits.extensions.lnurlp import lnurlp_ext  # type: ignore
+from . import lnurlp_ext
 from .crud import (
     create_pay_link,
     get_pay_link,
@@ -22,11 +22,11 @@ async def api_links():
     wallet_ids = [g.wallet.id]
 
     if "all_wallets" in request.args:
-        wallet_ids = get_user(g.wallet.user).wallet_ids
+        wallet_ids = (await get_user(g.wallet.user)).wallet_ids
 
     try:
         return (
-            jsonify([{**link._asdict(), **{"lnurl": link.lnurl}} for link in get_pay_links(wallet_ids)]),
+            jsonify([{**link._asdict(), **{"lnurl": link.lnurl}} for link in await get_pay_links(wallet_ids)]),
             HTTPStatus.OK,
         )
     except LnurlInvalidUrl:
@@ -39,7 +39,7 @@ async def api_links():
 @lnurlp_ext.route("/api/v1/links/<link_id>", methods=["GET"])
 @api_check_wallet_key("invoice")
 async def api_link_retrieve(link_id):
-    link = get_pay_link(link_id)
+    link = await get_pay_link(link_id)
 
     if not link:
         return jsonify({"message": "Pay link does not exist."}), HTTPStatus.NOT_FOUND
@@ -75,7 +75,7 @@ async def api_link_create_or_update(link_id=None):
         return jsonify({"message": "Must use full satoshis."}), HTTPStatus.BAD_REQUEST
 
     if link_id:
-        link = get_pay_link(link_id)
+        link = await get_pay_link(link_id)
 
         if not link:
             return jsonify({"message": "Pay link does not exist."}), HTTPStatus.NOT_FOUND
@@ -83,9 +83,9 @@ async def api_link_create_or_update(link_id=None):
         if link.wallet != g.wallet.id:
             return jsonify({"message": "Not your pay link."}), HTTPStatus.FORBIDDEN
 
-        link = update_pay_link(link_id, **g.data)
+        link = await update_pay_link(link_id, **g.data)
     else:
-        link = create_pay_link(wallet_id=g.wallet.id, **g.data)
+        link = await create_pay_link(wallet_id=g.wallet.id, **g.data)
 
     return jsonify({**link._asdict(), **{"lnurl": link.lnurl}}), HTTPStatus.OK if link_id else HTTPStatus.CREATED
 
@@ -93,7 +93,7 @@ async def api_link_create_or_update(link_id=None):
 @lnurlp_ext.route("/api/v1/links/<link_id>", methods=["DELETE"])
 @api_check_wallet_key("invoice")
 async def api_link_delete(link_id):
-    link = get_pay_link(link_id)
+    link = await get_pay_link(link_id)
 
     if not link:
         return jsonify({"message": "Pay link does not exist."}), HTTPStatus.NOT_FOUND
@@ -101,7 +101,7 @@ async def api_link_delete(link_id):
     if link.wallet != g.wallet.id:
         return jsonify({"message": "Not your pay link."}), HTTPStatus.FORBIDDEN
 
-    delete_pay_link(link_id)
+    await delete_pay_link(link_id)
 
     return "", HTTPStatus.NO_CONTENT