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#!/usr/bin/env python3
# Copyright (c) 2017-2020 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 that we don't leak txs to inbound peers that we haven't yet announced to"""
from test_framework.blocktools import COINBASE_MATURITY
from test_framework.messages import msg_getdata, CInv, MSG_TX
from test_framework.p2p import p2p_lock, P2PDataStore
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
)
from test_framework.wallet import MiniWallet
class P2PNode(P2PDataStore):
def on_inv(self, msg):
pass
class P2PLeakTxTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
def run_test(self):
gen_node = self.nodes[0] # The block and tx generating node
miniwallet = MiniWallet(gen_node)
# Add enough mature utxos to the wallet, so that all txs spend confirmed coins
self.generate(miniwallet, 1)
self.generate(gen_node, COINBASE_MATURITY)
inbound_peer = self.nodes[0].add_p2p_connection(P2PNode()) # An "attacking" inbound peer
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 = miniwallet.send_self_transfer(from_node=gen_node)['wtxid']
want_tx = msg_getdata()
want_tx.inv.append(CInv(t=MSG_TX, h=int(txid, 16)))
with p2p_lock:
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))
with p2p_lock:
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()
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