1  #!/usr/bin/env python3
  2  # Copyright (c) 2019-2022 The Bitcoin Core developers
  3  # Distributed under the MIT software license, see the accompanying
  4  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  5  """Test p2p blocksonly mode & block-relay-only connections."""
  6  
  7  import time
  8  
  9  from test_framework.messages import msg_tx, msg_inv, CInv, MSG_WTX
 10  from test_framework.p2p import P2PInterface, P2PTxInvStore
 11  from test_framework.test_framework import BitcoinTestFramework
 12  from test_framework.util import assert_equal
 13  from test_framework.wallet import MiniWallet
 14  
 15  
 16  class P2PBlocksOnly(BitcoinTestFramework):
 17      def set_test_params(self):
 18          self.num_nodes = 1
 19          self.extra_args = [["-blocksonly"]]
 20  
 21      def run_test(self):
 22          self.miniwallet = MiniWallet(self.nodes[0])
 23  
 24          self.blocksonly_mode_tests()
 25          self.blocks_relay_conn_tests()
 26  
 27      def blocksonly_mode_tests(self):
 28          self.log.info("Tests with node running in -blocksonly mode")
 29          assert_equal(self.nodes[0].getnetworkinfo()['localrelay'], False)
 30  
 31          self.nodes[0].add_p2p_connection(P2PInterface())
 32          tx, txid, wtxid, tx_hex = self.check_p2p_tx_violation()
 33  
 34          self.log.info('Check that tx invs also violate the protocol')
 35          self.nodes[0].add_p2p_connection(P2PInterface())
 36          with self.nodes[0].assert_debug_log(['transaction (0000000000000000000000000000000000000000000000000000000000001234) inv sent in violation of protocol, disconnecting peer']):
 37              self.nodes[0].p2ps[0].send_without_ping(msg_inv([CInv(t=MSG_WTX, h=0x1234)]))
 38              self.nodes[0].p2ps[0].wait_for_disconnect()
 39              del self.nodes[0].p2ps[0]
 40  
 41          self.log.info('Check that txs from rpc are not rejected and relayed to other peers')
 42          tx_relay_peer = self.nodes[0].add_p2p_connection(P2PInterface())
 43          assert_equal(self.nodes[0].getpeerinfo()[0]['relaytxes'], True)
 44  
 45          assert_equal(self.nodes[0].testmempoolaccept([tx_hex])[0]['allowed'], True)
 46          with self.nodes[0].assert_debug_log(['received getdata for: wtx {} peer'.format(wtxid)]):
 47              self.nodes[0].sendrawtransaction(tx_hex)
 48              tx_relay_peer.wait_for_tx(txid)
 49              assert_equal(self.nodes[0].getmempoolinfo()['size'], 1)
 50  
 51          self.log.info("Restarting node 0 with relay permission and blocksonly")
 52          self.restart_node(0, ["-persistmempool=0", "-whitelist=relay@127.0.0.1", "-blocksonly"])
 53          assert_equal(self.nodes[0].getrawmempool(), [])
 54          first_peer = self.nodes[0].add_p2p_connection(P2PInterface())
 55          second_peer = self.nodes[0].add_p2p_connection(P2PInterface())
 56          peer_1_info = self.nodes[0].getpeerinfo()[0]
 57          assert_equal(peer_1_info['permissions'], ['relay'])
 58          assert_equal(first_peer.relay, 1)
 59          peer_2_info = self.nodes[0].getpeerinfo()[1]
 60          assert_equal(peer_2_info['permissions'], ['relay'])
 61          assert_equal(self.nodes[0].testmempoolaccept([tx_hex])[0]['allowed'], True)
 62  
 63          self.log.info('Check that the tx from first_peer with relay-permission is relayed to others (ie.second_peer)')
 64          with self.nodes[0].assert_debug_log(["received getdata"]):
 65              # Note that normally, first_peer would never send us transactions since we're a blocksonly node.
 66              # By activating blocksonly, we explicitly tell our peers that they should not send us transactions,
 67              # and Bitcoin Core respects that choice and will not send transactions.
 68              # But if, for some reason, first_peer decides to relay transactions to us anyway, we should relay them to
 69              # second_peer since we gave relay permission to first_peer.
 70              # See https://github.com/bitcoin/bitcoin/issues/19943 for details.
 71              first_peer.send_without_ping(msg_tx(tx))
 72              self.log.info('Check that the peer with relay-permission is still connected after sending the transaction')
 73              assert_equal(first_peer.is_connected, True)
 74              second_peer.wait_for_tx(txid)
 75              assert_equal(self.nodes[0].getmempoolinfo()['size'], 1)
 76          self.log.info("Relay-permission peer's transaction is accepted and relayed")
 77  
 78          self.nodes[0].disconnect_p2ps()
 79          self.generate(self.nodes[0], 1)
 80  
 81      def blocks_relay_conn_tests(self):
 82          self.log.info('Tests with node in normal mode with block-relay-only connections')
 83          self.restart_node(0, ["-noblocksonly"])  # disables blocks only mode
 84          assert_equal(self.nodes[0].getnetworkinfo()['localrelay'], True)
 85  
 86          # Ensure we disconnect if a block-relay-only connection sends us a transaction
 87          self.nodes[0].add_outbound_p2p_connection(P2PInterface(), p2p_idx=0, connection_type="block-relay-only")
 88          assert_equal(self.nodes[0].getpeerinfo()[0]['relaytxes'], False)
 89          _, txid, _, tx_hex = self.check_p2p_tx_violation()
 90  
 91          self.log.info("Tests with node in normal mode with block-relay-only connection, sending an inv")
 92          conn = self.nodes[0].add_outbound_p2p_connection(P2PInterface(), p2p_idx=0, connection_type="block-relay-only")
 93          assert_equal(self.nodes[0].getpeerinfo()[0]['relaytxes'], False)
 94          self.check_p2p_inv_violation(conn)
 95  
 96          self.log.info("Check that txs from RPC are not sent to blockrelay connection")
 97          conn = self.nodes[0].add_outbound_p2p_connection(P2PTxInvStore(), p2p_idx=1, connection_type="block-relay-only")
 98  
 99          self.nodes[0].sendrawtransaction(tx_hex)
100  
101          # Bump time forward to ensure m_next_inv_send_time timer pops
102          self.nodes[0].setmocktime(int(time.time()) + 60)
103  
104          conn.sync_with_ping()
105          assert int(txid, 16) not in conn.get_invs()
106  
107      def check_p2p_inv_violation(self, peer):
108          self.log.info("Check that tx-invs from P2P are rejected and result in disconnect")
109          with self.nodes[0].assert_debug_log(["inv sent in violation of protocol, disconnecting peer"]):
110              peer.send_without_ping(msg_inv([CInv(t=MSG_WTX, h=0x12345)]))
111              peer.wait_for_disconnect()
112          self.nodes[0].disconnect_p2ps()
113  
114      def check_p2p_tx_violation(self):
115          self.log.info('Check that txs from P2P are rejected and result in disconnect')
116          spendtx = self.miniwallet.create_self_transfer()
117  
118          with self.nodes[0].assert_debug_log(['transaction sent in violation of protocol, disconnecting peer=0']):
119              self.nodes[0].p2ps[0].send_without_ping(msg_tx(spendtx['tx']))
120              self.nodes[0].p2ps[0].wait_for_disconnect()
121              assert_equal(self.nodes[0].getmempoolinfo()['size'], 0)
122          self.nodes[0].disconnect_p2ps()
123  
124          return spendtx['tx'], spendtx['txid'], spendtx['wtxid'], spendtx['hex']
125  
126  
127  if __name__ == '__main__':
128      P2PBlocksOnly(__file__).main()