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 BIP 37
  """
  
  from test_framework.messages import (
      MSG_BLOCK,
      MSG_FILTERED_BLOCK,
      msg_getdata,
      msg_filterload,
      msg_filteradd,
      msg_filterclear,
  )
  from test_framework.mininode import P2PInterface
  from test_framework.test_framework import BitcoinTestFramework
  
  
  class FilterNode(P2PInterface):
      # This is a P2SH watch-only wallet
      watch_script_pubkey = 'a914ffffffffffffffffffffffffffffffffffffffff87'
      # The initial filter (n=10, fp=0.000001) with just the above scriptPubKey added
      watch_filter_init = msg_filterload(
          data=
          b'@\x00\x08\x00\x80\x00\x00 \x00\xc0\x00 \x04\x00\x08$\x00\x04\x80\x00\x00 \x00\x00\x00\x00\x80\x00\x00@\x00\x02@ \x00',
          nHashFuncs=19,
          nTweak=0,
          nFlags=1,
      )
  
      def on_inv(self, message):
          want = msg_getdata()
          for i in message.inv:
              # inv messages can only contain TX or BLOCK, so translate BLOCK to FILTERED_BLOCK
              if i.type == MSG_BLOCK:
                  i.type = MSG_FILTERED_BLOCK
              want.inv.append(i)
          if len(want.inv):
              self.send_message(want)
  
      def on_merkleblock(self, message):
          self.merkleblock_received = True
  
      def on_tx(self, message):
          self.tx_received = True
  
  
  class FilterTest(BitcoinTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = False
          self.num_nodes = 1
          self.extra_args = [[
              '-peerbloomfilters',
              '-whitelist=noban@127.0.0.1',  # immediate tx relay
          ]]
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def run_test(self):
          filter_node = self.nodes[0].add_p2p_connection(FilterNode())
  
          self.log.info('Check that too large filter is rejected')
          with self.nodes[0].assert_debug_log(['Misbehaving']):
              filter_node.send_and_ping(msg_filterload(data=b'\xaa', nHashFuncs=51, nTweak=0, nFlags=1))
  
          self.log.info('Add filtered P2P connection to the node')
          filter_node.send_and_ping(filter_node.watch_filter_init)
          filter_address = self.nodes[0].decodescript(filter_node.watch_script_pubkey)['addresses'][0]
  
          self.log.info('Check that we receive merkleblock and tx if the filter matches a tx in a block')
          block_hash = self.nodes[0].generatetoaddress(1, filter_address)[0]
          txid = self.nodes[0].getblock(block_hash)['tx'][0]
          filter_node.wait_for_merkleblock(block_hash)
          filter_node.wait_for_tx(txid)
  
          self.log.info('Check that we only receive a merkleblock if the filter does not match a tx in a block')
          filter_node.tx_received = False
          block_hash = self.nodes[0].generatetoaddress(1, self.nodes[0].getnewaddress())[0]
          filter_node.wait_for_merkleblock(block_hash)
          assert not filter_node.tx_received
  
          self.log.info('Check that we not receive a tx if the filter does not match a mempool tx')
          filter_node.merkleblock_received = False
          filter_node.tx_received = False
          self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 90)
          filter_node.sync_with_ping()
          filter_node.sync_with_ping()
          assert not filter_node.merkleblock_received
          assert not filter_node.tx_received
  
          self.log.info('Check that we receive a tx in reply to a mempool msg if the filter matches a mempool tx')
          filter_node.merkleblock_received = False
          txid = self.nodes[0].sendtoaddress(filter_address, 90)
          filter_node.wait_for_tx(txid)
          assert not filter_node.merkleblock_received
  
          self.log.info('Check that after deleting filter all txs get relayed again')
          filter_node.send_and_ping(msg_filterclear())
          for _ in range(5):
              txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 7)
              filter_node.wait_for_tx(txid)
  
          self.log.info("Check that division-by-zero remote crash bug [CVE-2013-5700] is fixed")
          filter_node.send_and_ping(msg_filterload(data=b'', nHashFuncs=1))
          filter_node.send_and_ping(msg_filteradd(data=b'letstrytocrashthisnode'))
  
  
  if __name__ == '__main__':
      FilterTest().main()
  