fix find_matching_payment_op() bug

Dockerfile

@@ -27,7 +27,7 @@ DJANGO_SECRET_KEY=notsosecretkey\
 
 # Install dependencies
 WORKDIR /code
-RUN pip install pipenv; pipenv lock --clear; pipenv install --dev --system
+RUN pip install pipenv; pipenv install --dev --system
 
 # collect static assets
 RUN python manage.py collectstatic --no-input --ignore=*.scss

polaris/polaris/management/commands/watch_transactions.py

@@ -174,15 +174,11 @@ def find_matching_payment_op(
         :param horizon_tx: the decoded Transaction object contained in the Horizon response
         :param transaction: a database model object representing the transaction
         """
-        if horizon_tx.source.public_key != transaction.stellar_account:
-            # transaction wasn't created by sender of payment
-            return
-
         matching_payment_op = None
         for operation in horizon_tx.operations:
             if cls._check_payment_op(operation, transaction.asset):
                 transaction.stellar_transaction_id = response["id"]
-                transaction.from_address = horizon_tx.source.public_key
+                transaction.from_address = operation.source
                 transaction.paging_token = response["paging_token"]
                 transaction.status_eta = 0
                 transaction.save()

polaris/polaris/tests/processes/test_watch_transactions.py

@@ -26,6 +26,7 @@
                 amount=50,
                 destination=Keypair.from_secret(USD_DISTRIBUTION_SEED).public_key,
                 type_code=Mock(return_value=1),
+                source="GCUZ6YLL5RQBTYLTTQLPCM73C5XAIUGK2TIMWQH7HPSGWVS2KJ2F3CHS",
             )
         ],
         source=Keypair.from_public_key(