text: #!/usr/bin/env python3
  # Copyright (c) 2020 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """
  Test addrv2 relay
  """
  
  import time
  
  from test_framework.messages import (
      CAddress,
      msg_addrv2,
      NODE_NETWORK,
      NODE_WITNESS,
  )
  from test_framework.p2p import P2PInterface
  from test_framework.test_framework import XCBCTestFramework
  from test_framework.util import assert_equal
  
  I2P_ADDR = "c4gfnttsuwqomiygupdqqqyy5y5emnk5c73hrfvatri67prd7vyq.b32.i2p"
  
  ADDRS = []
  for i in range(10):
      addr = CAddress()
      addr.time = int(time.time()) + i
      addr.nServices = NODE_NETWORK | NODE_WITNESS
      # Add one I2P address at an arbitrary position.
      if i == 5:
          addr.net = addr.NET_I2P
          addr.ip = I2P_ADDR
      else:
          addr.ip = f"123.123.123.{i % 256}"
      addr.port = 8333 + i
      ADDRS.append(addr)
  
  
  class AddrReceiver(P2PInterface):
      addrv2_received_and_checked = False
  
      def __init__(self):
          super().__init__(support_addrv2 = True)
  
      def on_addrv2(self, message):
          expected_set = set((addr.ip, addr.port) for addr in ADDRS)
          received_set = set((addr.ip, addr.port) for addr in message.addrs)
          if expected_set == received_set:
              self.addrv2_received_and_checked = True
  
      def wait_for_addrv2(self):
          self.wait_until(lambda: "addrv2" in self.last_message)
  
  
  class AddrTest(XCBCTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 1
          self.extra_args = [["-whitelist=addr@127.0.0.1"]]
  
      def run_test(self):
          self.log.info('Create connection that sends addrv2 messages')
          addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
          msg = msg_addrv2()
  
          self.log.info('Send too-large addrv2 message')
          msg.addrs = ADDRS * 101
          with self.nodes[0].assert_debug_log(['addrv2 message size = 1010']):
              addr_source.send_and_ping(msg)
  
          self.log.info('Check that addrv2 message content is relayed and added to addrman')
          addr_receiver = self.nodes[0].add_p2p_connection(AddrReceiver())
          msg.addrs = ADDRS
          with self.nodes[0].assert_debug_log([
                  # The I2P address is not added to node's own addrman because it has no
                  # I2P reachability (thus 10 - 1 = 9).
                  'Added 9 addresses from 127.0.0.1: 0 tried',
                  'received: addrv2 (159 bytes) peer=0',
                  'sending addrv2 (159 bytes) peer=1',
          ]):
              addr_source.send_and_ping(msg)
              self.nodes[0].setmocktime(int(time.time()) + 30 * 60)
              addr_receiver.wait_for_addrv2()
  
          assert addr_receiver.addrv2_received_and_checked
          assert_equal(len(self.nodes[0].getnodeaddresses(count=0, network="i2p")), 0)
  
  
  if __name__ == '__main__':
      AddrTest().main()
  