(xor
 (seq
  (seq
   (seq
    (seq
     (seq
      (seq
       (seq
        (seq
         (call %init_peer_id% ("getDataSrv" "-relay-") [] -relay-)
         (call %init_peer_id% ("getDataSrv" "array") [] array)
        )
        (call %init_peer_id% ("getDataSrv" "chunk_size") [] chunk_size)
       )
       (call %init_peer_id% ("getDataSrv" "node") [] node)
      )
      (call %init_peer_id% ("getDataSrv" "service_id") [] service_id)
     )
     (call -relay- ("op" "identity") [])
    )
    (xor
     (call node (service_id "array_splitter_u64") [array chunk_size] res)
     (seq
      (seq
       (call -relay- ("op" "identity") [])
       (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 1])
      )
      (call -relay- ("op" "identity") [])
     )
    )
   )
   (call -relay- ("op" "identity") [])
  )
  (xor
   (call %init_peer_id% ("callbackSrv" "response") [res])
   (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 2])
  )
 )
 (seq
  (call -relay- ("op" "identity") [])
  (call %init_peer_id% ("errorHandlingSrv" "error") [%last_error% 3])
 )
)