text: #!/usr/bin/env python3
  # Copyright (c) 2017-2018 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 that we don't leak txs to inbound peers that we haven't yet announced to"""
  
  from test_framework.messages import msg_getdata, CInv
  from test_framework.mininode import P2PDataStore
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import (
      assert_equal,
  )
  
  
  class P2PNode(P2PDataStore):
      def on_inv(self, msg):
          pass
  
  
  class P2PLeakTxTest(BitcoinTestFramework):
      def set_test_params(self):
          self.num_nodes = 1
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def run_test(self):
          # The block and tx generating node
          gen_node = self.nodes[0]
          gen_node.generate(1)
  
          # An "attacking" inbound peer
          inbound_peer = self.nodes[0].add_p2p_connection(P2PNode())
  
          MAX_REPEATS = 100
          self.log.info("Running test up to {} times.".format(MAX_REPEATS))
          for i in range(MAX_REPEATS):
              self.log.info('Run repeat {}'.format(i + 1))
              txid = gen_node.sendtoaddress(gen_node.getnewaddress(), 0.01)
  
              want_tx = msg_getdata()
              want_tx.inv.append(CInv(t=1, h=int(txid, 16)))
              inbound_peer.last_message.pop('notfound', None)
              inbound_peer.send_and_ping(want_tx)
  
              if inbound_peer.last_message.get('notfound'):
                  self.log.debug(
                      'tx {} was not yet announced to us.'.format(txid))
                  self.log.debug(
                      "node has responded with a notfound message. End test.")
                  assert_equal(
                      inbound_peer.last_message['notfound'].vec[0].hash, int(txid, 16))
                  inbound_peer.last_message.pop('notfound')
                  break
              else:
                  self.log.debug(
                      'tx {} was already announced to us. Try test again.'.format(txid))
                  assert int(txid, 16) in [
                      inv.hash for inv in inbound_peer.last_message['inv'].inv]
  
  
  if __name__ == '__main__':
      P2PLeakTxTest().main()
  