File size: 6,283 Bytes
910db9a | 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 | #!/usr/bin/env python3
# Copyright (c) 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.
from test_framework.mininode import *
from test_framework.test_framework import InfinitumTestFramework
from test_framework.util import *
import time
from test_framework.blocktools import create_block, create_coinbase
'''
Test version bits' warning system.
Generate chains with block versions that appear to be signalling unknown
soft-forks, and test that warning alerts are generated.
'''
VB_PERIOD = 144 # versionbits period length for regtest
VB_THRESHOLD = 108 # versionbits activation threshold for regtest
VB_TOP_BITS = 0x20000000
VB_UNKNOWN_BIT = 27 # Choose a bit unassigned to any deployment
# TestNode: bare-bones "peer". Used mostly as a conduit for a test to sending
# p2p messages to a node, generating the messages in the main testing logic.
class TestNode(NodeConnCB):
def __init__(self):
NodeConnCB.__init__(self)
self.connection = None
self.ping_counter = 1
self.last_pong = msg_pong()
def add_connection(self, conn):
self.connection = conn
def on_inv(self, conn, message):
pass
# Wrapper for the NodeConn's send_message function
def send_message(self, message):
self.connection.send_message(message)
def on_pong(self, conn, message):
self.last_pong = message
# Sync up with the node after delivery of a block
def sync_with_ping(self, timeout=30):
self.connection.send_message(msg_ping(nonce=self.ping_counter))
received_pong = False
sleep_time = 0.05
while not received_pong and timeout > 0:
time.sleep(sleep_time)
timeout -= sleep_time
with mininode_lock:
if self.last_pong.nonce == self.ping_counter:
received_pong = True
self.ping_counter += 1
return received_pong
class VersionBitsWarningTest(InfinitumTestFramework):
def __init__(self):
super().__init__()
self.setup_clean_chain = True
self.num_nodes = 1
def setup_network(self):
self.nodes = []
self.alert_filename = os.path.join(self.options.tmpdir, "alert.txt")
# Open and close to create zero-length file
with open(self.alert_filename, 'w') as f:
pass
self.node_options = ["-debug", "-logtimemicros=1", "-alertnotify=echo %s >> \"" + self.alert_filename + "\""]
self.nodes.append(start_node(0, self.options.tmpdir, self.node_options))
import re
self.vb_pattern = re.compile("^Warning.*versionbit")
# Send numblocks blocks via peer with nVersionToUse set.
def send_blocks_with_version(self, peer, numblocks, nVersionToUse):
tip = self.nodes[0].getbestblockhash()
height = self.nodes[0].getblockcount()
block_time = self.nodes[0].getblockheader(tip)["time"]+1
tip = int(tip, 16)
for i in range(numblocks):
block = create_block(tip, create_coinbase(height+1), block_time)
block.nVersion = nVersionToUse
block.solve()
peer.send_message(msg_block(block))
block_time += 1
height += 1
tip = block.sha256
peer.sync_with_ping()
def test_versionbits_in_alert_file(self):
with open(self.alert_filename, 'r') as f:
alert_text = f.read()
assert(self.vb_pattern.match(alert_text))
def run_test(self):
# Setup the p2p connection and start up the network thread.
test_node = TestNode()
connections = []
connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_node))
test_node.add_connection(connections[0])
NetworkThread().start() # Start up network handling in another thread
# Test logic begins here
test_node.wait_for_verack()
# 1. Have the node mine one period worth of blocks
self.nodes[0].generate(VB_PERIOD)
# 2. Now build one period of blocks on the tip, with < VB_THRESHOLD
# blocks signaling some unknown bit.
nVersion = VB_TOP_BITS | (1<<VB_UNKNOWN_BIT)
self.send_blocks_with_version(test_node, VB_THRESHOLD-1, nVersion)
# Fill rest of period with regular version blocks
self.nodes[0].generate(VB_PERIOD - VB_THRESHOLD + 1)
# Check that we're not getting any versionbit-related errors in
# getinfo()
assert(not self.vb_pattern.match(self.nodes[0].getinfo()["errors"]))
# 3. Now build one period of blocks with >= VB_THRESHOLD blocks signaling
# some unknown bit
self.send_blocks_with_version(test_node, VB_THRESHOLD, nVersion)
self.nodes[0].generate(VB_PERIOD - VB_THRESHOLD)
# Might not get a versionbits-related alert yet, as we should
# have gotten a different alert due to more than 51/100 blocks
# being of unexpected version.
# Check that getinfo() shows some kind of error.
assert(len(self.nodes[0].getinfo()["errors"]) != 0)
# Mine a period worth of expected blocks so the generic block-version warning
# is cleared, and restart the node. This should move the versionbit state
# to ACTIVE.
self.nodes[0].generate(VB_PERIOD)
stop_node(self.nodes[0], 0)
wait_infinitumds()
# Empty out the alert file
with open(self.alert_filename, 'w') as f:
pass
self.nodes[0] = start_node(0, self.options.tmpdir, ["-debug", "-logtimemicros=1", "-alertnotify=echo %s >> \"" + self.alert_filename + "\""])
# Connecting one block should be enough to generate an error.
self.nodes[0].generate(1)
assert(len(self.nodes[0].getinfo()["errors"]) != 0)
stop_node(self.nodes[0], 0)
wait_infinitumds()
self.test_versionbits_in_alert_file()
# Test framework expects the node to still be running...
self.nodes[0] = start_node(0, self.options.tmpdir, ["-debug", "-logtimemicros=1", "-alertnotify=echo %s >> \"" + self.alert_filename + "\""])
if __name__ == '__main__':
VersionBitsWarningTest().main()
|