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
|
#!/usr/bin/env python3
# Copyright (c) 2015-2016 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 BIP 9 soft forks.
Connect to a single node.
regtest lock-in with 108/144 block signalling
activation after a further 144 blocks
mine 2 block and save coinbases for later use
mine 141 blocks to transition from DEFINED to STARTED
mine 100 blocks signalling readiness and 44 not in order to fail to change state this period
mine 108 blocks signalling readiness and 36 blocks not signalling readiness (STARTED->LOCKED_IN)
mine a further 143 blocks (LOCKED_IN)
test that enforcement has not triggered (which triggers ACTIVE)
test that enforcement has triggered
"""
from test_framework.blockstore import BlockStore
from test_framework.test_framework import ComparisonTestFramework
from test_framework.util import *
from test_framework.mininode import CTransaction, NetworkThread
from test_framework.blocktools import create_coinbase, create_block
from test_framework.comptool import TestInstance, TestManager
from test_framework.script import CScript, OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP
from io import BytesIO
import time
import itertools
class BIP9SoftForksTest(ComparisonTestFramework):
def __init__(self):
super().__init__()
self.num_nodes = 1
def setup_network(self):
self.nodes = start_nodes(self.num_nodes, self.options.tmpdir,
extra_args=[['-whitelist=127.0.0.1']],
binary=[self.options.testbinary])
def run_test(self):
self.test = TestManager(self, self.options.tmpdir)
self.test.add_all_connections(self.nodes)
NetworkThread().start() # Start up network handling in another thread
self.test.run()
def create_transaction(self, node, coinbase, to_address, amount):
from_txid = node.getblock(coinbase)['tx'][0]
inputs = [{ "txid" : from_txid, "vout" : 0}]
outputs = { to_address : amount }
rawtx = node.createrawtransaction(inputs, outputs)
tx = CTransaction()
f = BytesIO(hex_str_to_bytes(rawtx))
tx.deserialize(f)
tx.nVersion = 2
return tx
def sign_transaction(self, node, tx):
signresult = node.signrawtransaction(bytes_to_hex_str(tx.serialize()))
tx = CTransaction()
f = BytesIO(hex_str_to_bytes(signresult['hex']))
tx.deserialize(f)
return tx
def generate_blocks(self, number, version, test_blocks = []):
for i in range(number):
block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1)
block.nVersion = version
block.rehash()
block.solve()
test_blocks.append([block, True])
self.last_block_time += 1
self.tip = block.sha256
self.height += 1
return test_blocks
def get_bip9_status(self, key):
info = self.nodes[0].getblockchaininfo()
return info['bip9_softforks'][key]
def test_BIP(self, bipName, activated_version, invalidate, invalidatePostSignature, bitno):
assert_equal(self.get_bip9_status(bipName)['status'], 'defined')
assert_equal(self.get_bip9_status(bipName)['since'], 0)
# generate some coins for later
self.coinbase_blocks = self.nodes[0].generate(2)
self.height = 3 # height of the next block to build
self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0)
self.nodeaddress = self.nodes[0].getnewaddress()
self.last_block_time = int(time.time())
assert_equal(self.get_bip9_status(bipName)['status'], 'defined')
assert_equal(self.get_bip9_status(bipName)['since'], 0)
tmpl = self.nodes[0].getblocktemplate({})
assert(bipName not in tmpl['rules'])
assert(bipName not in tmpl['vbavailable'])
assert_equal(tmpl['vbrequired'], 0)
assert_equal(tmpl['version'], 0x20000000)
# Test 1
# Advance from DEFINED to STARTED
test_blocks = self.generate_blocks(141, 4)
yield TestInstance(test_blocks, sync_every_block=False)
assert_equal(self.get_bip9_status(bipName)['status'], 'started')
assert_equal(self.get_bip9_status(bipName)['since'], 144)
tmpl = self.nodes[0].getblocktemplate({})
assert(bipName not in tmpl['rules'])
assert_equal(tmpl['vbavailable'][bipName], bitno)
assert_equal(tmpl['vbrequired'], 0)
assert(tmpl['version'] & activated_version)
# Test 2
# Fail to achieve LOCKED_IN 100 out of 144 signal bit 1
# using a variety of bits to simulate multiple parallel softforks
test_blocks = self.generate_blocks(50, activated_version) # 0x20000001 (signalling ready)
test_blocks = self.generate_blocks(20, 4, test_blocks) # 0x00000004 (signalling not)
test_blocks = self.generate_blocks(50, activated_version, test_blocks) # 0x20000101 (signalling ready)
test_blocks = self.generate_blocks(24, 4, test_blocks) # 0x20010000 (signalling not)
yield TestInstance(test_blocks, sync_every_block=False)
assert_equal(self.get_bip9_status(bipName)['status'], 'started')
assert_equal(self.get_bip9_status(bipName)['since'], 144)
tmpl = self.nodes[0].getblocktemplate({})
assert(bipName not in tmpl['rules'])
assert_equal(tmpl['vbavailable'][bipName], bitno)
assert_equal(tmpl['vbrequired'], 0)
assert(tmpl['version'] & activated_version)
# Test 3
# 108 out of 144 signal bit 1 to achieve LOCKED_IN
# using a variety of bits to simulate multiple parallel softforks
test_blocks = self.generate_blocks(58, activated_version) # 0x20000001 (signalling ready)
test_blocks = self.generate_blocks(26, 4, test_blocks) # 0x00000004 (signalling not)
test_blocks = self.generate_blocks(50, activated_version, test_blocks) # 0x20000101 (signalling ready)
test_blocks = self.generate_blocks(10, 4, test_blocks) # 0x20010000 (signalling not)
yield TestInstance(test_blocks, sync_every_block=False)
assert_equal(self.get_bip9_status(bipName)['status'], 'locked_in')
assert_equal(self.get_bip9_status(bipName)['since'], 432)
tmpl = self.nodes[0].getblocktemplate({})
assert(bipName not in tmpl['rules'])
# Test 4
# 143 more version 536870913 blocks (waiting period-1)
test_blocks = self.generate_blocks(143, 4)
yield TestInstance(test_blocks, sync_every_block=False)
assert_equal(self.get_bip9_status(bipName)['status'], 'locked_in')
assert_equal(self.get_bip9_status(bipName)['since'], 432)
tmpl = self.nodes[0].getblocktemplate({})
assert(bipName not in tmpl['rules'])
# Test 5
# Check that the new rule is enforced
spendtx = self.create_transaction(self.nodes[0],
self.coinbase_blocks[0], self.nodeaddress, 1.0)
invalidate(spendtx)
spendtx = self.sign_transaction(self.nodes[0], spendtx)
spendtx.rehash()
invalidatePostSignature(spendtx)
spendtx.rehash()
block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1)
block.nVersion = activated_version
block.vtx.append(spendtx)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
block.solve()
self.last_block_time += 1
self.tip = block.sha256
self.height += 1
yield TestInstance([[block, True]])
assert_equal(self.get_bip9_status(bipName)['status'], 'active')
assert_equal(self.get_bip9_status(bipName)['since'], 576)
tmpl = self.nodes[0].getblocktemplate({})
assert(bipName in tmpl['rules'])
assert(bipName not in tmpl['vbavailable'])
assert_equal(tmpl['vbrequired'], 0)
assert(not (tmpl['version'] & (1 << bitno)))
# Test 6
# Check that the new sequence lock rules are enforced
spendtx = self.create_transaction(self.nodes[0],
self.coinbase_blocks[1], self.nodeaddress, 1.0)
invalidate(spendtx)
spendtx = self.sign_transaction(self.nodes[0], spendtx)
spendtx.rehash()
invalidatePostSignature(spendtx)
spendtx.rehash()
block = create_block(self.tip, create_coinbase(self.height), self.last_block_time + 1)
block.nVersion = 5
block.vtx.append(spendtx)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
block.solve()
self.last_block_time += 1
yield TestInstance([[block, False]])
# Restart all
self.test.block_store.close()
stop_nodes(self.nodes)
shutil.rmtree(self.options.tmpdir)
self.setup_chain()
self.setup_network()
self.test.block_store = BlockStore(self.options.tmpdir)
self.test.clear_all_connections()
self.test.add_all_connections(self.nodes)
NetworkThread().start() # Start up network handling in another thread
def get_tests(self):
for test in itertools.chain(
self.test_BIP('csv', 0x20000001, self.sequence_lock_invalidate, self.donothing, 0),
self.test_BIP('csv', 0x20000001, self.mtp_invalidate, self.donothing, 0),
self.test_BIP('csv', 0x20000001, self.donothing, self.csv_invalidate, 0)
):
yield test
def donothing(self, tx):
return
def csv_invalidate(self, tx):
"""Modify the signature in vin 0 of the tx to fail CSV
Prepends -1 CSV DROP in the scriptSig itself.
"""
tx.vin[0].scriptSig = CScript([OP_1NEGATE, OP_CHECKSEQUENCEVERIFY, OP_DROP] +
list(CScript(tx.vin[0].scriptSig)))
def sequence_lock_invalidate(self, tx):
"""Modify the nSequence to make it fails once sequence lock rule is
activated (high timespan).
"""
tx.vin[0].nSequence = 0x00FFFFFF
tx.nLockTime = 0
def mtp_invalidate(self, tx):
"""Modify the nLockTime to make it fails once MTP rule is activated."""
# Disable Sequence lock, Activate nLockTime
tx.vin[0].nSequence = 0x90FFFFFF
tx.nLockTime = self.last_block_time
if __name__ == '__main__':
BIP9SoftForksTest().main()
|
