1  #!/usr/bin/env python3
  2  # Copyright (c) 2017-present 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 transaction upload"""
  6  
  7  from test_framework.messages import msg_getdata, CInv, MSG_TX, MSG_WTX
  8  from test_framework.p2p import p2p_lock, P2PDataStore, P2PTxInvStore
  9  from test_framework.test_framework import BitcoinTestFramework
 10  from test_framework.util import (
 11      assert_equal,
 12  )
 13  from test_framework.wallet import MiniWallet
 14  
 15  import time
 16  
 17  class P2PNode(P2PDataStore):
 18      def on_inv(self, message):
 19          pass
 20  
 21  
 22  class P2PLeakTxTest(BitcoinTestFramework):
 23      def set_test_params(self):
 24          self.num_nodes = 1
 25  
 26      def run_test(self):
 27          self.gen_node = self.nodes[0]  # The block and tx generating node
 28          self.miniwallet = MiniWallet(self.gen_node)
 29          self.mocktime = int(time.time())
 30  
 31          self.test_tx_in_block()
 32          self.test_notfound_on_replaced_tx()
 33          self.test_notfound_on_unannounced_tx()
 34  
 35      def test_tx_in_block(self):
 36          self.log.info("Check that a transaction in the last block is uploaded (beneficial for compact block relay)")
 37          self.gen_node.setmocktime(self.mocktime)
 38          inbound_peer = self.gen_node.add_p2p_connection(P2PNode())
 39  
 40          self.log.debug("Generate transaction and block")
 41          inbound_peer.last_message.pop("inv", None)
 42  
 43          wtxid = self.miniwallet.send_self_transfer(from_node=self.gen_node)["wtxid"]
 44          rawmp = self.gen_node.getrawmempool(False, True)
 45          pi = self.gen_node.getpeerinfo()[0]
 46          assert_equal(rawmp["mempool_sequence"], 2) # our tx cause mempool activity
 47          assert_equal(pi["last_inv_sequence"], 1) # that is after the last inv
 48          assert_equal(pi["inv_to_send"], 1) # and our tx has been queued
 49          self.mocktime += 120
 50          self.gen_node.setmocktime(self.mocktime)
 51          inbound_peer.wait_until(lambda: "inv" in inbound_peer.last_message and inbound_peer.last_message.get("inv").inv[0].hash == int(wtxid, 16))
 52  
 53          rawmp = self.gen_node.getrawmempool(False, True)
 54          pi = self.gen_node.getpeerinfo()[0]
 55          assert_equal(rawmp["mempool_sequence"], 2) # no mempool update
 56          assert_equal(pi["last_inv_sequence"], 2) # announced the current mempool
 57          assert_equal(pi["inv_to_send"], 0) # nothing left in the queue
 58  
 59          want_tx = msg_getdata(inv=inbound_peer.last_message.get("inv").inv)
 60          self.generate(self.gen_node, 1)
 61  
 62          self.log.debug("Request transaction")
 63          inbound_peer.last_message.pop("tx", None)
 64          inbound_peer.send_and_ping(want_tx)
 65          assert_equal(inbound_peer.last_message.get("tx").tx.wtxid_hex, wtxid)
 66  
 67      def test_notfound_on_replaced_tx(self):
 68          self.gen_node.disconnect_p2ps()
 69          self.gen_node.setmocktime(self.mocktime)
 70          inbound_peer = self.gen_node.add_p2p_connection(P2PTxInvStore())
 71  
 72          self.log.info("Transaction tx_a is broadcast")
 73          tx_a = self.miniwallet.send_self_transfer(from_node=self.gen_node)
 74          self.mocktime += 120
 75          self.gen_node.setmocktime(self.mocktime)
 76          inbound_peer.wait_for_broadcast(txns=[tx_a["wtxid"]])
 77  
 78          tx_b = tx_a["tx"]
 79          tx_b.vout[0].nValue -= 9000
 80          self.gen_node.sendrawtransaction(tx_b.serialize().hex())
 81          self.mocktime += 120
 82          self.gen_node.setmocktime(self.mocktime)
 83          inbound_peer.wait_until(lambda: "tx" in inbound_peer.last_message and inbound_peer.last_message.get("tx").tx.wtxid_hex == tx_b.wtxid_hex)
 84  
 85          self.log.info("Re-request of tx_a after replacement is answered with notfound")
 86          req_vec = [
 87              CInv(t=MSG_TX, h=int(tx_a["txid"], 16)),
 88              CInv(t=MSG_WTX, h=int(tx_a["wtxid"], 16)),
 89          ]
 90          want_tx = msg_getdata()
 91          want_tx.inv = req_vec
 92          with p2p_lock:
 93              inbound_peer.last_message.pop("notfound", None)
 94              inbound_peer.last_message.pop("tx", None)
 95          inbound_peer.send_and_ping(want_tx)
 96  
 97          assert_equal(inbound_peer.last_message.get("notfound").vec, req_vec)
 98          assert "tx" not in inbound_peer.last_message
 99  
100      def test_notfound_on_unannounced_tx(self):
101          self.log.info("Check that we don't leak txs to inbound peers that we haven't yet announced to")
102          self.gen_node.disconnect_p2ps()
103          inbound_peer = self.gen_node.add_p2p_connection(P2PNode())  # An "attacking" inbound peer
104  
105          # Set a mock time so that time does not pass, and gen_node never announces the transaction
106          self.gen_node.setmocktime(self.mocktime)
107          wtxid = int(self.miniwallet.send_self_transfer(from_node=self.gen_node)["wtxid"], 16)
108  
109          want_tx = msg_getdata()
110          want_tx.inv.append(CInv(t=MSG_WTX, h=wtxid))
111          with p2p_lock:
112              inbound_peer.last_message.pop('notfound', None)
113          inbound_peer.send_and_ping(want_tx)
114          inbound_peer.wait_until(lambda: "notfound" in inbound_peer.last_message)
115          with p2p_lock:
116              assert_equal(inbound_peer.last_message.get("notfound").vec[0].hash, wtxid)
117              inbound_peer.last_message.pop('notfound')
118  
119          # Move mocktime forward and wait for the announcement.
120          inbound_peer.last_message.pop('inv', None)
121          self.mocktime += 120
122          self.gen_node.setmocktime(self.mocktime)
123          inbound_peer.wait_for_inv([CInv(t=MSG_WTX, h=wtxid)], timeout=120)
124  
125          # Send the getdata again, this time the node should send us a TX message.
126          inbound_peer.last_message.pop('tx', None)
127          inbound_peer.send_and_ping(want_tx)
128          self.wait_until(lambda: "tx" in inbound_peer.last_message)
129          assert_equal(wtxid, int(inbound_peer.last_message["tx"].tx.wtxid_hex, 16))
130  
131  
132  if __name__ == '__main__':
133      P2PLeakTxTest(__file__).main()