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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 transaction download behavior
"""
from decimal import Decimal
import time
from test_framework.mempool_util import (
fill_mempool,
)
from test_framework.messages import (
CInv,
MSG_TX,
MSG_TYPE_MASK,
MSG_WTX,
msg_inv,
msg_notfound,
msg_tx,
)
from test_framework.p2p import (
P2PInterface,
p2p_lock,
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
)
from test_framework.wallet import MiniWallet
class TestP2PConn(P2PInterface):
def __init__(self, wtxidrelay=True):
super().__init__(wtxidrelay=wtxidrelay)
self.tx_getdata_count = 0
def on_getdata(self, message):
for i in message.inv:
if i.type & MSG_TYPE_MASK == MSG_TX or i.type & MSG_TYPE_MASK == MSG_WTX:
self.tx_getdata_count += 1
# Constants from net_processing
GETDATA_TX_INTERVAL = 60 # seconds
INBOUND_PEER_TX_DELAY = 2 # seconds
TXID_RELAY_DELAY = 2 # seconds
OVERLOADED_PEER_DELAY = 2 # seconds
MAX_GETDATA_IN_FLIGHT = 100
MAX_PEER_TX_ANNOUNCEMENTS = 5000
NONPREF_PEER_TX_DELAY = 2
# Python test constants
NUM_INBOUND = 10
MAX_GETDATA_INBOUND_WAIT = GETDATA_TX_INTERVAL + INBOUND_PEER_TX_DELAY + TXID_RELAY_DELAY
class TxDownloadTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 2
self.extra_args= [['-datacarriersize=100000', '-maxmempool=5', '-persistmempool=0']] * self.num_nodes
def test_tx_requests(self):
self.log.info("Test that we request transactions from all our peers, eventually")
txid = 0xdeadbeef
self.log.info("Announce the txid from each incoming peer to node 0")
msg = msg_inv([CInv(t=MSG_WTX, h=txid)])
for p in self.nodes[0].p2ps:
p.send_and_ping(msg)
outstanding_peer_index = [i for i in range(len(self.nodes[0].p2ps))]
def getdata_found(peer_index):
p = self.nodes[0].p2ps[peer_index]
with p2p_lock:
return p.last_message.get("getdata") and p.last_message["getdata"].inv[-1].hash == txid
node_0_mocktime = int(time.time())
while outstanding_peer_index:
node_0_mocktime += MAX_GETDATA_INBOUND_WAIT
self.nodes[0].setmocktime(node_0_mocktime)
self.wait_until(lambda: any(getdata_found(i) for i in outstanding_peer_index))
for i in outstanding_peer_index:
if getdata_found(i):
outstanding_peer_index.remove(i)
self.nodes[0].setmocktime(0)
self.log.info("All outstanding peers received a getdata")
def test_inv_block(self):
self.log.info("Generate a transaction on node 0")
tx = self.wallet.create_self_transfer()
txid = int(tx['txid'], 16)
self.log.info(
"Announce the transaction to all nodes from all {} incoming peers, but never send it".format(NUM_INBOUND))
msg = msg_inv([CInv(t=MSG_TX, h=txid)])
for p in self.peers:
p.send_and_ping(msg)
self.log.info("Put the tx in node 0's mempool")
self.nodes[0].sendrawtransaction(tx['hex'])
# Since node 1 is connected outbound to an honest peer (node 0), it
# should get the tx within a timeout. (Assuming that node 0
# announced the tx within the timeout)
# The timeout is the sum of
# * the worst case until the tx is first requested from an inbound
# peer, plus
# * the first time it is re-requested from the outbound peer, plus
# * 2 seconds to avoid races
assert self.nodes[1].getpeerinfo()[0]['inbound'] == False
timeout = 2 + INBOUND_PEER_TX_DELAY + GETDATA_TX_INTERVAL
self.log.info("Tx should be received at node 1 after {} seconds".format(timeout))
self.sync_mempools(timeout=timeout)
def test_in_flight_max(self):
self.log.info("Test that we don't load peers with more than {} transaction requests immediately".format(MAX_GETDATA_IN_FLIGHT))
txids = [i for i in range(MAX_GETDATA_IN_FLIGHT + 2)]
p = self.nodes[0].p2ps[0]
with p2p_lock:
p.tx_getdata_count = 0
mock_time = int(time.time() + 1)
self.nodes[0].setmocktime(mock_time)
for i in range(MAX_GETDATA_IN_FLIGHT):
p.send_message(msg_inv([CInv(t=MSG_WTX, h=txids[i])]))
p.sync_with_ping()
mock_time += INBOUND_PEER_TX_DELAY
self.nodes[0].setmocktime(mock_time)
p.wait_until(lambda: p.tx_getdata_count >= MAX_GETDATA_IN_FLIGHT)
for i in range(MAX_GETDATA_IN_FLIGHT, len(txids)):
p.send_message(msg_inv([CInv(t=MSG_WTX, h=txids[i])]))
p.sync_with_ping()
self.log.info("No more than {} requests should be seen within {} seconds after announcement".format(MAX_GETDATA_IN_FLIGHT, INBOUND_PEER_TX_DELAY + OVERLOADED_PEER_DELAY - 1))
self.nodes[0].setmocktime(mock_time + INBOUND_PEER_TX_DELAY + OVERLOADED_PEER_DELAY - 1)
p.sync_with_ping()
with p2p_lock:
assert_equal(p.tx_getdata_count, MAX_GETDATA_IN_FLIGHT)
self.log.info("If we wait {} seconds after announcement, we should eventually get more requests".format(INBOUND_PEER_TX_DELAY + OVERLOADED_PEER_DELAY))
self.nodes[0].setmocktime(mock_time + INBOUND_PEER_TX_DELAY + OVERLOADED_PEER_DELAY)
p.wait_until(lambda: p.tx_getdata_count == len(txids))
def test_expiry_fallback(self):
self.log.info('Check that expiry will select another peer for download')
WTXID = 0xffaa
peer1 = self.nodes[0].add_p2p_connection(TestP2PConn())
peer2 = self.nodes[0].add_p2p_connection(TestP2PConn())
for p in [peer1, peer2]:
p.send_message(msg_inv([CInv(t=MSG_WTX, h=WTXID)]))
# One of the peers is asked for the tx
peer2.wait_until(lambda: sum(p.tx_getdata_count for p in [peer1, peer2]) == 1)
with p2p_lock:
_peer_expiry, peer_fallback = (peer1, peer2) if peer1.tx_getdata_count == 1 else (peer2, peer1)
assert_equal(peer_fallback.tx_getdata_count, 0)
self.nodes[0].setmocktime(int(time.time()) + GETDATA_TX_INTERVAL + 1) # Wait for request to _peer_expiry to expire
peer_fallback.wait_until(lambda: peer_fallback.tx_getdata_count >= 1, timeout=1)
self.restart_node(0) # reset mocktime
def test_disconnect_fallback(self):
self.log.info('Check that disconnect will select another peer for download')
WTXID = 0xffbb
peer1 = self.nodes[0].add_p2p_connection(TestP2PConn())
peer2 = self.nodes[0].add_p2p_connection(TestP2PConn())
for p in [peer1, peer2]:
p.send_message(msg_inv([CInv(t=MSG_WTX, h=WTXID)]))
# One of the peers is asked for the tx
peer2.wait_until(lambda: sum(p.tx_getdata_count for p in [peer1, peer2]) == 1)
with p2p_lock:
peer_disconnect, peer_fallback = (peer1, peer2) if peer1.tx_getdata_count == 1 else (peer2, peer1)
assert_equal(peer_fallback.tx_getdata_count, 0)
peer_disconnect.peer_disconnect()
peer_disconnect.wait_for_disconnect()
peer_fallback.wait_until(lambda: peer_fallback.tx_getdata_count >= 1, timeout=1)
def test_notfound_fallback(self):
self.log.info('Check that notfounds will select another peer for download immediately')
WTXID = 0xffdd
peer1 = self.nodes[0].add_p2p_connection(TestP2PConn())
peer2 = self.nodes[0].add_p2p_connection(TestP2PConn())
for p in [peer1, peer2]:
p.send_message(msg_inv([CInv(t=MSG_WTX, h=WTXID)]))
# One of the peers is asked for the tx
peer2.wait_until(lambda: sum(p.tx_getdata_count for p in [peer1, peer2]) == 1)
with p2p_lock:
peer_notfound, peer_fallback = (peer1, peer2) if peer1.tx_getdata_count == 1 else (peer2, peer1)
assert_equal(peer_fallback.tx_getdata_count, 0)
peer_notfound.send_and_ping(msg_notfound(vec=[CInv(MSG_WTX, WTXID)])) # Send notfound, so that fallback peer is selected
peer_fallback.wait_until(lambda: peer_fallback.tx_getdata_count >= 1, timeout=1)
def test_preferred_inv(self, preferred=False):
if preferred:
self.log.info('Check invs from preferred peers are downloaded immediately')
self.restart_node(0, extra_args=['-whitelist=noban@127.0.0.1'])
else:
self.log.info('Check invs from non-preferred peers are downloaded after {} s'.format(NONPREF_PEER_TX_DELAY))
mock_time = int(time.time() + 1)
self.nodes[0].setmocktime(mock_time)
peer = self.nodes[0].add_p2p_connection(TestP2PConn())
peer.send_message(msg_inv([CInv(t=MSG_WTX, h=0xff00ff00)]))
peer.sync_with_ping()
if preferred:
peer.wait_until(lambda: peer.tx_getdata_count >= 1, timeout=1)
else:
with p2p_lock:
assert_equal(peer.tx_getdata_count, 0)
self.nodes[0].setmocktime(mock_time + NONPREF_PEER_TX_DELAY)
peer.wait_until(lambda: peer.tx_getdata_count >= 1, timeout=1)
def test_txid_inv_delay(self, glob_wtxid=False):
self.log.info('Check that inv from a txid-relay peers are delayed by {} s, with a wtxid peer {}'.format(TXID_RELAY_DELAY, glob_wtxid))
self.restart_node(0, extra_args=['-whitelist=noban@127.0.0.1'])
mock_time = int(time.time() + 1)
self.nodes[0].setmocktime(mock_time)
peer = self.nodes[0].add_p2p_connection(TestP2PConn(wtxidrelay=False))
if glob_wtxid:
# Add a second wtxid-relay connection otherwise TXID_RELAY_DELAY is waived in
# lack of wtxid-relay peers
self.nodes[0].add_p2p_connection(TestP2PConn(wtxidrelay=True))
peer.send_message(msg_inv([CInv(t=MSG_TX, h=0xff11ff11)]))
peer.sync_with_ping()
with p2p_lock:
assert_equal(peer.tx_getdata_count, 0 if glob_wtxid else 1)
self.nodes[0].setmocktime(mock_time + TXID_RELAY_DELAY)
peer.wait_until(lambda: peer.tx_getdata_count >= 1, timeout=1)
def test_large_inv_batch(self):
self.log.info('Test how large inv batches are handled with relay permission')
self.restart_node(0, extra_args=['-whitelist=relay@127.0.0.1'])
peer = self.nodes[0].add_p2p_connection(TestP2PConn())
peer.send_message(msg_inv([CInv(t=MSG_WTX, h=wtxid) for wtxid in range(MAX_PEER_TX_ANNOUNCEMENTS + 1)]))
peer.wait_until(lambda: peer.tx_getdata_count == MAX_PEER_TX_ANNOUNCEMENTS + 1)
self.log.info('Test how large inv batches are handled without relay permission')
self.restart_node(0)
peer = self.nodes[0].add_p2p_connection(TestP2PConn())
peer.send_message(msg_inv([CInv(t=MSG_WTX, h=wtxid) for wtxid in range(MAX_PEER_TX_ANNOUNCEMENTS + 1)]))
peer.wait_until(lambda: peer.tx_getdata_count == MAX_PEER_TX_ANNOUNCEMENTS)
peer.sync_with_ping()
def test_spurious_notfound(self):
self.log.info('Check that spurious notfound is ignored')
self.nodes[0].p2ps[0].send_message(msg_notfound(vec=[CInv(MSG_TX, 1)]))
def test_rejects_filter_reset(self):
self.log.info('Check that rejected tx is not requested again')
node = self.nodes[0]
fill_mempool(self, node, tx_sync_fun=self.no_op)
self.wallet.rescan_utxos()
mempoolminfee = node.getmempoolinfo()['mempoolminfee']
peer = node.add_p2p_connection(TestP2PConn())
low_fee_tx = self.wallet.create_self_transfer(fee_rate=Decimal("0.9")*mempoolminfee)
assert_equal(node.testmempoolaccept([low_fee_tx['hex']])[0]["reject-reason"], "mempool min fee not met")
peer.send_and_ping(msg_tx(low_fee_tx['tx']))
peer.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=int(low_fee_tx['wtxid'], 16))]))
node.setmocktime(int(time.time()))
node.bumpmocktime(MAX_GETDATA_INBOUND_WAIT)
peer.sync_with_ping()
assert_equal(peer.tx_getdata_count, 0)
self.log.info('Check that rejection filter is cleared after new block comes in')
self.generate(self.wallet, 1, sync_fun=self.no_op)
peer.sync_with_ping()
peer.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=int(low_fee_tx['wtxid'], 16))]))
node.bumpmocktime(MAX_GETDATA_INBOUND_WAIT)
peer.wait_for_getdata([int(low_fee_tx['wtxid'], 16)])
def run_test(self):
self.wallet = MiniWallet(self.nodes[0])
# Run tests without mocktime that only need one peer-connection first, to avoid restarting the nodes
self.test_expiry_fallback()
self.test_disconnect_fallback()
self.test_notfound_fallback()
self.test_preferred_inv()
self.test_preferred_inv(True)
self.test_txid_inv_delay()
self.test_txid_inv_delay(True)
self.test_large_inv_batch()
self.test_spurious_notfound()
# Run each test against new bitcoind instances, as setting mocktimes has long-term effects on when
# the next trickle relay event happens.
for test, with_inbounds in [
(self.test_in_flight_max, True),
(self.test_inv_block, True),
(self.test_tx_requests, True),
(self.test_rejects_filter_reset, False),
]:
self.stop_nodes()
self.start_nodes()
self.connect_nodes(1, 0)
# Setup the p2p connections
self.peers = []
if with_inbounds:
for node in self.nodes:
for _ in range(NUM_INBOUND):
self.peers.append(node.add_p2p_connection(TestP2PConn()))
self.log.info("Nodes are setup with {} incoming connections each".format(NUM_INBOUND))
test()
if __name__ == '__main__':
TxDownloadTest(__file__).main()
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