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/base.py

@@ -1,5 +1,5 @@
 from abc import ABC, abstractmethod
-from typing import Coroutine, Optional, Union
+from typing import AsyncGenerator, Coroutine, Optional, Union
 
 from pydantic import BaseModel
 
@@ -68,6 +68,7 @@ class PaymentStatus(BaseModel):
 
 class LightningBackend(ABC):
     supports_mpp: bool = False
+    supports_incoming_payment_stream: bool = False
     supported_units: set[Unit]
     unit: Unit
 
@@ -124,9 +125,9 @@ class LightningBackend(ABC):
     # ) -> InvoiceQuoteResponse:
     #     pass
 
-    # @abstractmethod
-    # def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
-    #     pass
+    @abstractmethod
+    def paid_invoices_stream(self) -> AsyncGenerator[str, None]:
+        pass
 
 
 class Unsupported(Exception):