1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
|
#!/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 transaction download behavior
"""
from test_framework.messages import (
CInv,
MSG_TX,
MSG_TYPE_MASK,
MSG_WTX,
msg_inv,
msg_notfound,
tx_from_hex,
)
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.address import ADDRESS_BCRT1_UNSPENDABLE
import time
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
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.nodes[0].createrawtransaction(
inputs=[{ # coinbase
"txid": self.nodes[0].getblock(self.nodes[0].getblockhash(1))['tx'][0],
"vout": 0
}],
outputs={ADDRESS_BCRT1_UNSPENDABLE: 50 - 0.00025},
)
tx = self.nodes[0].signrawtransactionwithkey(
hexstring=tx,
privkeys=[self.nodes[0].get_deterministic_priv_key().key],
)['hex']
ctx = tx_from_hex(tx)
txid = int(ctx.rehash(), 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)
# 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 run_test(self):
# 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 in [self.test_in_flight_max, self.test_inv_block, self.test_tx_requests]:
self.stop_nodes()
self.start_nodes()
self.connect_nodes(1, 0)
# Setup the p2p connections
self.peers = []
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().main()
|
