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/corelightningrest.py

@@ -247,17 +247,21 @@ class CoreLightningRestWallet(LightningBackend):
             r.raise_for_status()
             data = r.json()
 
-            if r.is_error or "error" in data or not data.get("pays"):
-                raise Exception("error in corelightning-rest response")
+            if not data.get("pays"):
+                # payment not found
+                logger.error(f"payment not found: {data.get('pays')}")
+                raise Exception("payment not found")
+
+            if r.is_error or "error" in data:
+                message = data.get("error") or data
+                raise Exception(f"error in corelightning-rest response: {message}")
 
             pay = data["pays"][0]
 
             fee_msat, preimage = None, None
             if self.statuses[pay["status"]]:
                 # cut off "msat" and convert to int
-                fee_msat = -int(pay["amount_sent_msat"][:-4]) - int(
-                    pay["amount_msat"][:-4]
-                )
+                fee_msat = -int(pay["amount_sent_msat"]) - int(pay["amount_msat"])
                 preimage = pay["preimage"]
 
             return PaymentStatus(