forked from bitcoin/bitcoin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathmempool_persist.py
executable file
·177 lines (148 loc) · 8.06 KB
/
mempool_persist.py
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
#!/usr/bin/env python3
# Copyright (c) 2014-2020 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 mempool persistence.
By default, bitcoind will dump mempool on shutdown and
then reload it on startup. This can be overridden with
the -persistmempool=0 command line option.
Test is as follows:
- start node0, node1 and node2. node1 has -persistmempool=0
- create 5 transactions on node2 to its own address. Note that these
are not sent to node0 or node1 addresses because we don't want
them to be saved in the wallet.
- check that node0 and node1 have 5 transactions in their mempools
- shutdown all nodes.
- startup node0. Verify that it still has 5 transactions
in its mempool. Shutdown node0. This tests that by default the
mempool is persistent.
- startup node1. Verify that its mempool is empty. Shutdown node1.
This tests that with -persistmempool=0, the mempool is not
dumped to disk when the node is shut down.
- Restart node0 with -persistmempool=0. Verify that its mempool is
empty. Shutdown node0. This tests that with -persistmempool=0,
the mempool is not loaded from disk on start up.
- Restart node0 with -persistmempool. Verify that it has 5
transactions in its mempool. This tests that -persistmempool=0
does not overwrite a previously valid mempool stored on disk.
- Remove node0 mempool.dat and verify savemempool RPC recreates it
and verify that node1 can load it and has 5 transactions in its
mempool.
- Verify that savemempool throws when the RPC is called if
node1 can't write to disk.
"""
from decimal import Decimal
import os
import time
from test_framework.p2p import P2PTxInvStore
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_greater_than_or_equal,
assert_raises_rpc_error,
connect_nodes,
disconnect_nodes,
)
class MempoolPersistTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 3
self.extra_args = [[], ["-persistmempool=0"], []]
def skip_test_if_missing_module(self):
self.skip_if_no_wallet()
def run_test(self):
self.log.debug("Send 5 transactions from node2 (to its own address)")
tx_creation_time_lower = int(time.time())
for _ in range(5):
last_txid = self.nodes[2].sendtoaddress(self.nodes[2].getnewaddress(), Decimal("10"))
node2_balance = self.nodes[2].getbalance()
self.sync_all()
tx_creation_time_higher = int(time.time())
self.log.debug("Verify that node0 and node1 have 5 transactions in their mempools")
assert_equal(len(self.nodes[0].getrawmempool()), 5)
assert_equal(len(self.nodes[1].getrawmempool()), 5)
self.log.debug("Prioritize a transaction on node0")
fees = self.nodes[0].getmempoolentry(txid=last_txid)['fees']
assert_equal(fees['base'], fees['modified'])
self.nodes[0].prioritisetransaction(txid=last_txid, fee_delta=1000)
fees = self.nodes[0].getmempoolentry(txid=last_txid)['fees']
assert_equal(fees['base'] + Decimal('0.00001000'), fees['modified'])
tx_creation_time = self.nodes[0].getmempoolentry(txid=last_txid)['time']
assert_greater_than_or_equal(tx_creation_time, tx_creation_time_lower)
assert_greater_than_or_equal(tx_creation_time_higher, tx_creation_time)
# disconnect nodes & make a txn that remains in the unbroadcast set.
disconnect_nodes(self.nodes[0], 1)
assert(len(self.nodes[0].getpeerinfo()) == 0)
assert(len(self.nodes[0].p2ps) == 0)
self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), Decimal("12"))
connect_nodes(self.nodes[0], 2)
self.log.debug("Stop-start the nodes. Verify that node0 has the transactions in its mempool and node1 does not. Verify that node2 calculates its balance correctly after loading wallet transactions.")
self.stop_nodes()
# Give this node a head-start, so we can be "extra-sure" that it didn't load anything later
# Also don't store the mempool, to keep the datadir clean
self.start_node(1, extra_args=["-persistmempool=0"])
self.start_node(0)
self.start_node(2)
assert self.nodes[0].getmempoolinfo()["loaded"] # start_node is blocking on the mempool being loaded
assert self.nodes[2].getmempoolinfo()["loaded"]
assert_equal(len(self.nodes[0].getrawmempool()), 6)
assert_equal(len(self.nodes[2].getrawmempool()), 5)
# The others have loaded their mempool. If node_1 loaded anything, we'd probably notice by now:
assert_equal(len(self.nodes[1].getrawmempool()), 0)
self.log.debug('Verify prioritization is loaded correctly')
fees = self.nodes[0].getmempoolentry(txid=last_txid)['fees']
assert_equal(fees['base'] + Decimal('0.00001000'), fees['modified'])
self.log.debug('Verify time is loaded correctly')
assert_equal(tx_creation_time, self.nodes[0].getmempoolentry(txid=last_txid)['time'])
# Verify accounting of mempool transactions after restart is correct
self.nodes[2].syncwithvalidationinterfacequeue() # Flush mempool to wallet
assert_equal(node2_balance, self.nodes[2].getbalance())
# start node0 with wallet disabled so wallet transactions don't get resubmitted
self.log.debug("Stop-start node0 with -persistmempool=0. Verify that it doesn't load its mempool.dat file.")
self.stop_nodes()
self.start_node(0, extra_args=["-persistmempool=0", "-disablewallet"])
assert self.nodes[0].getmempoolinfo()["loaded"]
assert_equal(len(self.nodes[0].getrawmempool()), 0)
self.log.debug("Stop-start node0. Verify that it has the transactions in its mempool.")
self.stop_nodes()
self.start_node(0)
assert self.nodes[0].getmempoolinfo()["loaded"]
assert_equal(len(self.nodes[0].getrawmempool()), 6)
mempooldat0 = os.path.join(self.nodes[0].datadir, self.chain, 'mempool.dat')
mempooldat1 = os.path.join(self.nodes[1].datadir, self.chain, 'mempool.dat')
self.log.debug("Remove the mempool.dat file. Verify that savemempool to disk via RPC re-creates it")
os.remove(mempooldat0)
self.nodes[0].savemempool()
assert os.path.isfile(mempooldat0)
self.log.debug("Stop nodes, make node1 use mempool.dat from node0. Verify it has 6 transactions")
os.rename(mempooldat0, mempooldat1)
self.stop_nodes()
self.start_node(1, extra_args=[])
assert self.nodes[1].getmempoolinfo()["loaded"]
assert_equal(len(self.nodes[1].getrawmempool()), 6)
self.log.debug("Prevent bitcoind from writing mempool.dat to disk. Verify that `savemempool` fails")
# to test the exception we are creating a tmp folder called mempool.dat.new
# which is an implementation detail that could change and break this test
mempooldotnew1 = mempooldat1 + '.new'
os.mkdir(mempooldotnew1)
assert_raises_rpc_error(-1, "Unable to dump mempool to disk", self.nodes[1].savemempool)
os.rmdir(mempooldotnew1)
self.test_persist_unbroadcast()
def test_persist_unbroadcast(self):
node0 = self.nodes[0]
self.start_node(0)
# clear out mempool
node0.generate(1)
# ensure node0 doesn't have any connections
# make a transaction that will remain in the unbroadcast set
assert(len(node0.getpeerinfo()) == 0)
assert(len(node0.p2ps) == 0)
node0.sendtoaddress(self.nodes[1].getnewaddress(), Decimal("12"))
# shutdown, then startup with wallet disabled
self.stop_nodes()
self.start_node(0, extra_args=["-disablewallet"])
# check that txn gets broadcast due to unbroadcast logic
conn = node0.add_p2p_connection(P2PTxInvStore())
node0.mockscheduler(16*60) # 15 min + 1 for buffer
self.wait_until(lambda: len(conn.get_invs()) == 1)
if __name__ == '__main__':
MempoolPersistTest().main()