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
|
#!/usr/bin/env python3
# Copyright (c) 2019 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,
CTransaction,
FromHex,
MSG_TX,
MSG_TYPE_MASK,
msg_inv,
msg_notfound,
)
from test_framework.mininode import (
P2PInterface,
mininode_lock,
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
wait_until,
)
from test_framework.address import ADDRESS_BCRT1_UNSPENDABLE
import time
class TestP2PConn(P2PInterface):
def __init__(self):
super().__init__()
self.tx_getdata_count = 0
def on_getdata(self, message):
for i in message.inv:
if i.type & MSG_TYPE_MASK == MSG_TX:
self.tx_getdata_count += 1
# Constants from net_processing
GETDATA_TX_INTERVAL = 60 # seconds
MAX_GETDATA_RANDOM_DELAY = 2 # seconds
INBOUND_PEER_TX_DELAY = 2 # seconds
MAX_GETDATA_IN_FLIGHT = 100
TX_EXPIRY_INTERVAL = GETDATA_TX_INTERVAL * 10
# Python test constants
NUM_INBOUND = 10
MAX_GETDATA_INBOUND_WAIT = GETDATA_TX_INTERVAL + MAX_GETDATA_RANDOM_DELAY + INBOUND_PEER_TX_DELAY
class TxDownloadTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = False
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=1, 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 mininode_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)
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 = FromHex(CTransaction(), 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=1, 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 + (MAX_GETDATA_RANDOM_DELAY + INBOUND_PEER_TX_DELAY) + (
GETDATA_TX_INTERVAL + MAX_GETDATA_RANDOM_DELAY)
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 request more than {} transactions from any peer, every {} minutes".format(
MAX_GETDATA_IN_FLIGHT, TX_EXPIRY_INTERVAL / 60))
txids = [i for i in range(MAX_GETDATA_IN_FLIGHT + 2)]
p = self.nodes[0].p2ps[0]
with mininode_lock:
p.tx_getdata_count = 0
p.send_message(msg_inv([CInv(t=1, h=i) for i in txids]))
wait_until(lambda: p.tx_getdata_count >= MAX_GETDATA_IN_FLIGHT, lock=mininode_lock)
with mininode_lock:
assert_equal(p.tx_getdata_count, MAX_GETDATA_IN_FLIGHT)
self.log.info("Now check that if we send a NOTFOUND for a transaction, we'll get one more request")
p.send_message(msg_notfound(vec=[CInv(t=1, h=txids[0])]))
wait_until(lambda: p.tx_getdata_count >= MAX_GETDATA_IN_FLIGHT + 1, timeout=10, lock=mininode_lock)
with mininode_lock:
assert_equal(p.tx_getdata_count, MAX_GETDATA_IN_FLIGHT + 1)
WAIT_TIME = TX_EXPIRY_INTERVAL // 2 + TX_EXPIRY_INTERVAL
self.log.info("if we wait about {} minutes, we should eventually get more requests".format(WAIT_TIME / 60))
self.nodes[0].setmocktime(int(time.time() + WAIT_TIME))
wait_until(lambda: p.tx_getdata_count == MAX_GETDATA_IN_FLIGHT + 2)
self.nodes[0].setmocktime(0)
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(1, 1)]))
def run_test(self):
# Setup the p2p connections
self.peers = []
for node in self.nodes:
for i 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))
self.test_spurious_notfound()
# Test the in-flight max first, because we want no transactions in
# flight ahead of this test.
self.test_in_flight_max()
self.test_inv_block()
self.test_tx_requests()
if __name__ == '__main__':
TxDownloadTest().main()
|
