Mint: Recover pending melts at startup (#499)

* wip works with fakewallet

* startup refactor

* add tests

* regtest tests for pending melts

* wip CLN

* remove db migration

* remove foreign key relation to keyset id

* fix: get_promise from db and restore DLEQs

* test: check for keyset not found error

* fix migrations

* lower-case all db column names

* add more tests for regtest

* simlate failure for lightning

* test wallet spent state with hodl invoices

* retry

* regtest with postgres

* retry postgres

* add sleeps

* longer sleep on github

* more sleep for github sigh

* increase sleep ffs

* add sleep loop

* try something

* do not pay with wallet but with ledger

* fix lnbits pending state

* fix pipeline to use fake admin from docker

cashu/lightning/lnbits.py

@@ -151,8 +151,18 @@ class LNbitsWallet(LightningBackend):
         if "paid" not in data and "details" not in data:
             return PaymentStatus(paid=None)
 
+        paid_value = None
+        if data["paid"]:
+            paid_value = True
+        elif not data["paid"] and data["details"]["pending"]:
+            paid_value = None
+        elif not data["paid"] and not data["details"]["pending"]:
+            paid_value = False
+        else:
+            raise ValueError(f"unexpected value for paid: {data['paid']}")
+
         return PaymentStatus(
-            paid=data["paid"],
+            paid=paid_value,
             fee=Amount(unit=Unit.msat, amount=abs(data["details"]["fee"])),
             preimage=data["preimage"],
         )