Traceback (most recent call last):
  File "/home/ci/app/src/worker.py", line 88, in process
    result = handler(event)
  File "/home/ci/app/src/handlers/payment.py", line 34, in handle_payment
    return gateway.charge(card, amount)
  File "/home/ci/app/src/vendor/gateway.py", line 120, in charge
    raise ConnectionError("upstream timeout")
