text: #!/usr/bin/env python3
  # Copyright (c) 2017 The Flashpaychain Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """Tests NODE_NETWORK_LIMITED.
  
  Tests that a node configured with -prune=550 signals NODE_NETWORK_LIMITED correctly
  and that it responds to getdata requests for blocks correctly:
      - send a block within 288 + 2 of the tip
      - disconnect peers who request blocks older than that."""
  from test_framework.messages import CInv, msg_getdata
  from test_framework.mininode import NODE_BLOOM, NODE_NETWORK_LIMITED, NODE_WITNESS, NetworkThread, P2PInterface
  from test_framework.test_framework import FlashpaychainTestFramework
  from test_framework.util import assert_equal
  
  class P2PIgnoreInv(P2PInterface):
      def on_inv(self, message):
          # The node will send us invs for other blocks. Ignore them.
          pass
  
      def send_getdata_for_block(self, blockhash):
          getdata_request = msg_getdata()
          getdata_request.inv.append(CInv(2, int(blockhash, 16)))
          self.send_message(getdata_request)
  
  class NodeNetworkLimitedTest(FlashpaychainTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 1
          self.extra_args = [['-prune=550']]
  
      def run_test(self):
          node = self.nodes[0].add_p2p_connection(P2PIgnoreInv())
          NetworkThread().start()
          node.wait_for_verack()
  
          expected_services = NODE_BLOOM | NODE_WITNESS | NODE_NETWORK_LIMITED
  
          self.log.info("Check that node has signalled expected services.")
          assert_equal(node.nServices, expected_services)
  
          self.log.info("Check that the localservices is as expected.")
          assert_equal(int(self.nodes[0].getnetworkinfo()['localservices'], 16), expected_services)
  
          self.log.info("Mine enough blocks to reach the NODE_NETWORK_LIMITED range.")
          blocks = self.nodes[0].generate(292)
  
          self.log.info("Make sure we can max retrive block at tip-288.")
          node.send_getdata_for_block(blocks[1])  # last block in valid range
          node.wait_for_block(int(blocks[1], 16), timeout=3)
  
          self.log.info("Requesting block at height 2 (tip-289) must fail (ignored).")
          node.send_getdata_for_block(blocks[0])  # first block outside of the 288+2 limit
          node.wait_for_disconnect(5)
  
  if __name__ == '__main__':
      NodeNetworkLimitedTest().main()
  