(xor
 (seq
  (seq
   (seq
    (seq
     (seq
      (seq
       (seq
        (seq
         (seq
          (call %init_peer_id% ("getDataSrv" "-relay-") [] -relay-)
          (call %init_peer_id% ("getDataSrv" "snapshot_id") [] snapshot_id)
         )
         (call %init_peer_id% ("getDataSrv" "node") [] node)
        )
        (call %init_peer_id% ("getDataSrv" "relay") [] relay)
       )
       (call -relay- ("op" "noop") [])
      )
      (call relay ("op" "noop") [])
     )
     (xor
      (call node ("DataProvider" "get_record") [snapshot_id] res)
      (seq
       (seq
        (seq
         (call relay ("op" "noop") [])
         (call -relay- ("op" "noop") [])
        )
        (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 1])
       )
       (call -relay- ("op" "noop") [])
      )
     )
    )
    (call relay ("op" "noop") [])
   )
   (call -relay- ("op" "noop") [])
  )
  (xor
   (call %init_peer_id% ("callbackSrv" "response") [res])
   (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 2])
  )
 )
 (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 3])
)