Add `tx_hashes` to exported payment requests (#7936)

* Add `tx_hashes` to payment requests

* Apply patch

* Fix for missing lnworker

electrum/wallet.py

@@ -2399,6 +2399,7 @@ class Abstract_Wallet(ABC, Logger, EventListener):
             'status': status,
             'status_str': status_str,
             'request_id': key,
+            "tx_hashes": []
         }
         if is_lightning:
             d['rhash'] = x.rhash
@@ -2407,12 +2408,16 @@ class Abstract_Wallet(ABC, Logger, EventListener):
             if self.lnworker and status == PR_UNPAID:
                 d['can_receive'] = self.lnworker.can_receive_invoice(x)
         if address:
-            paid, conf = self.is_onchain_invoice_paid(x)
             d['amount_sat'] = int(x.get_amount_sat())
             d['address'] = address
             d['URI'] = self.get_request_URI(x)
-            if conf is not None:
-                d['confirmations'] = conf
+            # if request was paid onchain, add relevant fields
+            # note: addr is reused when getting paid on LN! so we check for that.
+            is_paid, conf, tx_hashes = self._is_onchain_invoice_paid(x)
+            if is_paid and (not self.lnworker or self.lnworker.get_invoice_status(x) != PR_PAID):
+                if conf is not None:
+                    d['confirmations'] = conf
+                d['tx_hashes'] = tx_hashes
         run_hook('wallet_export_request', d, key)
         return d