Mint: add websockets for quote updates (#413)

* add websockets for quote updates

* add test (not working)

* wip: emit events to everyone

* wip: emit events to everyone

* wip, lots of things broken but invoice callback works

* wip

* add wip files

* tests almost passing

* add task

* refactor nut constants

* startup fix

* works with old mints

* wip cli

* fix mypy

* remove automatic invoice test now with websockets

* remove comment

* better logging

* send back response

* add rate limiter to websocket

* add rate limiter to subscriptions

* refactor websocket ratelimit

* websocket tests

* subscription kinds

* doesnt start

* remove circular import

* update

* fix mypy

* move test file in test because it fails if it runs later... dunno why

* adjust websocket NUT-06 settings

* local import and small fix

* disable websockets in CLI if "no_check" is selected

* move subscription test to where it was

* check proof state with callback, add tests

* tests: run mint fixture per module instead of per session

* subscription command name fix

* test per session again

* update test race conditions

* fix tests

* clean up

* tmp

* fix db issues and remove cached secrets

* fix tests

* blindly try pipeline

* remove comments

* comments

cashu/lightning/lnbits.py

@@ -1,5 +1,5 @@
 # type: ignore
-from typing import Optional
+from typing import AsyncGenerator, Optional
 
 import httpx
 from bolt11 import (
@@ -182,3 +182,6 @@ class LNbitsWallet(LightningBackend):
             fee=fees.to(self.unit, round="up"),
             amount=amount.to(self.unit, round="up"),
         )
+
+    async def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
+        raise NotImplementedError("paid_invoices_stream not implemented")