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#!/usr/bin/env python3
# Copyright (c) 2019-2021 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.messages import msg_tx, msg_inv, CInv, MSG_WTX
from test_framework.p2p import P2PInterface, P2PTxInvStore
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
from test_framework.wallet import MiniWallet
class P2PBlocksOnly(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
self.extra_args = [["-blocksonly"]]
def run_test(self):
self.miniwallet = MiniWallet(self.nodes[0])
# Add enough mature utxos to the wallet, so that all txs spend confirmed coins
self.miniwallet.rescan_utxos()
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, wtxid, tx_hex = self.check_p2p_tx_violation()
self.log.info('Check that tx invs also violate the protocol')
self.nodes[0].add_p2p_connection(P2PInterface())
with self.nodes[0].assert_debug_log(['transaction (0000000000000000000000000000000000000000000000000000000000001234) inv sent in violation of protocol, disconnecting peer']):
self.nodes[0].p2ps[0].send_message(msg_inv([CInv(t=MSG_WTX, h=0x1234)]))
self.nodes[0].p2ps[0].wait_for_disconnect()
del self.nodes[0].p2ps[0]
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'.format(wtxid)]):
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.generate(self.nodes[0], 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()
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)
conn.sync_send_with_ping()
assert(int(txid, 16) not in conn.get_invs())
def check_p2p_tx_violation(self):
self.log.info('Check that txs from P2P are rejected and result in disconnect')
spendtx = self.miniwallet.create_self_transfer()
with self.nodes[0].assert_debug_log(['transaction sent in violation of protocol peer=0']):
self.nodes[0].p2ps[0].send_message(msg_tx(spendtx['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 spendtx['tx'], spendtx['txid'], spendtx['wtxid'], spendtx['hex']
if __name__ == '__main__':
P2PBlocksOnly().main()
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