Backend: Unstuck outgoing payments (#857)

* first attempts

* lndrest works

* fix details

* optional fee update

* use base64.urlsafe_b64encode

* return paymentstatus

* CLN: return pending for pending invoices

* grpc wip

* lndgrpc works

* cln: return pending for pending invoices really this time

* retry wallet out of exception

* wip eclair

* take all routines into try except

* cliche: return error

* rename payment.check_pending() to payment.check_status()

* rename payment.check_pending() to payment.check_status()

* eclair: works

* eclair: better error check

* opennode: works

* check payment.checking_id istead of payment.ok

* payment.ok check as well

* cln: works?

* cln: works

* lntxbot: works

* lnbits/wallets/lnpay.py

* cln: error handling

* make format

* lndhub full detail update

* spark: wip

* error to False

* wallets: return clean PaymentResponse

* opennode: strict error

* cliche: works

* lnbits: works

* cln: dont throw error

* preimage not error

* fix cln

* do not add duplicate payments

* revert cln

* extra safety for cln

* undo crud changes until tests work

* tasks: better logging and 0.5s sleep for regular status check

* 0.1 s

* check if wallet exists

* lnbits unhashed description

* remove sleep

* revert app.py

* cleanup

* add check

* clean error

* readd app.py

* fix eclaid

lnbits/wallets/lntxbot.py

@@ -97,10 +97,11 @@ class LntxbotWallet(Wallet):
             except:
                 error_message = r.text
                 pass
-
-            return PaymentResponse(False, None, 0, None, error_message)
+            return PaymentResponse(False, None, None, None, error_message)
 
         data = r.json()
+        if data.get("type") != "paid_invoice":
+            return PaymentResponse(None)
         checking_id = data["payment_hash"]
         fee_msat = -data["fee_msat"]
         preimage = data["payment_preimage"]