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#!/usr/bin/env python3
# Copyright (c) 2019-2020 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 p2p blocksonly mode & block-relay-only connections."""
import time
from test_framework.blocktools import create_transaction
from test_framework.messages import msg_tx
from test_framework.p2p import P2PInterface, P2PTxInvStore
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
class P2PBlocksOnly(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = False
self.num_nodes = 1
self.extra_args = [["-blocksonly"]]
def skip_test_if_missing_module(self):
self.skip_if_no_wallet()
def run_test(self):
self.blocksonly_mode_tests()
self.blocks_relay_conn_tests()
def blocksonly_mode_tests(self):
self.log.info("Tests with node running in -blocksonly mode")
assert_equal(self.nodes[0].getnetworkinfo()['localrelay'], False)
self.nodes[0].add_p2p_connection(P2PInterface())
tx, txid, tx_hex = self.check_p2p_tx_violation()
self.log.info('Check that txs from rpc are not rejected and relayed to other peers')
tx_relay_peer = self.nodes[0].add_p2p_connection(P2PInterface())
assert_equal(self.nodes[0].getpeerinfo()[0]['relaytxes'], True)
assert_equal(self.nodes[0].testmempoolaccept([tx_hex])[0]['allowed'], True)
with self.nodes[0].assert_debug_log(['received getdata for: wtx {} peer=1'.format(txid)]):
self.nodes[0].sendrawtransaction(tx_hex)
tx_relay_peer.wait_for_tx(txid)
assert_equal(self.nodes[0].getmempoolinfo()['size'], 1)
self.log.info("Restarting node 0 with relay permission and blocksonly")
self.restart_node(0, ["-persistmempool=0", "-whitelist=relay@127.0.0.1", "-blocksonly"])
assert_equal(self.nodes[0].getrawmempool(), [])
first_peer = self.nodes[0].add_p2p_connection(P2PInterface())
second_peer = self.nodes[0].add_p2p_connection(P2PInterface())
peer_1_info = self.nodes[0].getpeerinfo()[0]
assert_equal(peer_1_info['permissions'], ['relay'])
peer_2_info = self.nodes[0].getpeerinfo()[1]
assert_equal(peer_2_info['permissions'], ['relay'])
assert_equal(self.nodes[0].testmempoolaccept([tx_hex])[0]['allowed'], True)
self.log.info('Check that the tx from first_peer with relay-permission is relayed to others (ie.second_peer)')
with self.nodes[0].assert_debug_log(["received getdata"]):
# Note that normally, first_peer would never send us transactions since we're a blocksonly node.
# By activating blocksonly, we explicitly tell our peers that they should not send us transactions,
# and Bitcoin Core respects that choice and will not send transactions.
# But if, for some reason, first_peer decides to relay transactions to us anyway, we should relay them to
# second_peer since we gave relay permission to first_peer.
# See https://github.com/bitcoin/bitcoin/issues/19943 for details.
first_peer.send_message(msg_tx(tx))
self.log.info('Check that the peer with relay-permission is still connected after sending the transaction')
assert_equal(first_peer.is_connected, True)
second_peer.wait_for_tx(txid)
assert_equal(self.nodes[0].getmempoolinfo()['size'], 1)
self.log.info("Relay-permission peer's transaction is accepted and relayed")
self.nodes[0].disconnect_p2ps()
self.nodes[0].generate(1)
def blocks_relay_conn_tests(self):
self.log.info('Tests with node in normal mode with block-relay-only connections')
self.restart_node(0, ["-noblocksonly"]) # disables blocks only mode
assert_equal(self.nodes[0].getnetworkinfo()['localrelay'], True)
# Ensure we disconnect if a block-relay-only connection sends us a transaction
self.nodes[0].add_outbound_p2p_connection(P2PInterface(), p2p_idx=0, connection_type="block-relay-only")
assert_equal(self.nodes[0].getpeerinfo()[0]['relaytxes'], False)
_, txid, tx_hex = self.check_p2p_tx_violation(index=2)
self.log.info("Check that txs from RPC are not sent to blockrelay connection")
conn = self.nodes[0].add_outbound_p2p_connection(P2PTxInvStore(), p2p_idx=1, connection_type="block-relay-only")
self.nodes[0].sendrawtransaction(tx_hex)
# Bump time forward to ensure nNextInvSend timer pops
self.nodes[0].setmocktime(int(time.time()) + 60)
# Calling sync_with_ping twice requires that the node calls
# `ProcessMessage` twice, and thus ensures `SendMessages` must have
# been called at least once
conn.sync_with_ping()
conn.sync_with_ping()
assert(int(txid, 16) not in conn.get_invs())
def check_p2p_tx_violation(self, index=1):
self.log.info('Check that txs from P2P are rejected and result in disconnect')
input_txid = self.nodes[0].getblock(self.nodes[0].getblockhash(index), 2)['tx'][0]['txid']
tx = create_transaction(self.nodes[0], input_txid, self.nodes[0].getnewaddress(), amount=(50 - 0.001))
txid = tx.rehash()
tx_hex = tx.serialize().hex()
with self.nodes[0].assert_debug_log(['transaction sent in violation of protocol peer=0']):
self.nodes[0].p2ps[0].send_message(msg_tx(tx))
self.nodes[0].p2ps[0].wait_for_disconnect()
assert_equal(self.nodes[0].getmempoolinfo()['size'], 0)
# Remove the disconnected peer
del self.nodes[0].p2ps[0]
return tx, txid, tx_hex
if __name__ == '__main__':
P2PBlocksOnly().main()
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