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Merge #12264: Fix versionbits warning test

1e2e09e2f6 Fix intermittent failure in p2p-versionbits-warning.py (John Newbery)
3bbd843708 Improve comments/logging in p2p-versionbits-warning.py (John Newbery)
ef2beb2c13 Fix flake8 warnings in p2p-versionbits-warning.py (John Newbery)

Pull request description:

  fixes #12259 (and tidies up the test)

  The problem was that the node was still in IBD at the point the last block was generated. UpdateTip() will not generate a warning if the node is still in IBD:

  cc5870a405/src/validation.cpp (L2151)

  The 'proper' fix would be to remove the overenthusiastic latching in DoWarning:

  cc5870a405/src/validation.cpp (L2135)

  so that more than one warning message can be output to `alertnotify`. Really we should suppress multiple messages of the same type, but allow messages to be output if they're for different warnings. That would mean the test wouldn't need to stop-start the node.

Tree-SHA512: 5c9aa5af7eba3c1350ea28482d57d3d79e3166c6224ceddb5d5a631090081d890d7403015e41f413c22990959a488cf1231f88bb825c54a609b24f89c450a1f6
tags/v0.16.1
MarcoFalke 3 years ago
parent
commit
598a9c4e4d
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1 changed files with 61 additions and 70 deletions
  1. 61
    70
      test/functional/feature_versionbits_warning.py

+ 61
- 70
test/functional/feature_versionbits_warning.py View File

@@ -7,25 +7,24 @@
Generate chains with block versions that appear to be signalling unknown
soft-forks, and test that warning alerts are generated.
"""

from test_framework.mininode import *
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *
import os
import re

from test_framework.blocktools import create_block, create_coinbase
from test_framework.messages import msg_block
from test_framework.mininode import P2PInterface, network_thread_start, mininode_lock
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import wait_until

VB_PERIOD = 144 # versionbits period length for regtest
VB_THRESHOLD = 108 # versionbits activation threshold for regtest
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
VB_UNKNOWN_BIT = 27 # Choose a bit unassigned to any deployment
VB_UNKNOWN_VERSION = VB_TOP_BITS | (1 << VB_UNKNOWN_BIT)

WARN_UNKNOWN_RULES_MINED = "Unknown block versions being mined! It's possible unknown rules are in effect"
WARN_UNKNOWN_RULES_ACTIVE = "unknown new rules activated (versionbit {})".format(VB_UNKNOWN_BIT)
VB_PATTERN = re.compile("^Warning.*versionbit")

class TestNode(P2PInterface):
def on_inv(self, message):
pass
VB_PATTERN = re.compile("Warning: unknown new rules activated.*versionbit")

class VersionBitsWarningTest(BitcoinTestFramework):
def set_test_params(self):
@@ -35,21 +34,21 @@ class VersionBitsWarningTest(BitcoinTestFramework):
def setup_network(self):
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', encoding='utf8') as _:
with open(self.alert_filename, 'w', encoding='utf8'):
pass
self.extra_args = [["-alertnotify=echo %s >> \"" + self.alert_filename + "\""]]
self.setup_nodes()

# Send numblocks blocks via peer with nVersionToUse set.
def send_blocks_with_version(self, peer, numblocks, nVersionToUse):
def send_blocks_with_version(self, peer, numblocks, version):
"""Send numblocks blocks to peer with version set"""
tip = self.nodes[0].getbestblockhash()
height = self.nodes[0].getblockcount()
block_time = self.nodes[0].getblockheader(tip)["time"]+1
block_time = self.nodes[0].getblockheader(tip)["time"] + 1
tip = int(tip, 16)

for _ in range(numblocks):
block = create_block(tip, create_coinbase(height+1), block_time)
block.nVersion = nVersionToUse
block = create_block(tip, create_coinbase(height + 1), block_time)
block.nVersion = version
block.solve()
peer.send_message(msg_block(block))
block_time += 1
@@ -57,65 +56,57 @@ class VersionBitsWarningTest(BitcoinTestFramework):
tip = block.sha256
peer.sync_with_ping()

def test_versionbits_in_alert_file(self):
with open(self.alert_filename, 'r', encoding='utf8') as f:
alert_text = f.read()
assert(VB_PATTERN.match(alert_text))
def versionbits_in_alert_file(self):
"""Test that the versionbits warning has been written to the alert file."""
alert_text = open(self.alert_filename, 'r', encoding='utf8').read()
return VB_PATTERN.search(alert_text) is not None

def run_test(self):
# Setup the p2p connection and start up the network thread.
self.nodes[0].add_p2p_connection(TestNode())
# Handy alias
node = self.nodes[0]
node.add_p2p_connection(P2PInterface())
network_thread_start()
node.p2p.wait_for_verack()

# Test logic begins here
self.nodes[0].p2p.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(self.nodes[0].p2p, 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
# get*info()
assert(not VB_PATTERN.match(self.nodes[0].getmininginfo()["warnings"]))
assert(not VB_PATTERN.match(self.nodes[0].getnetworkinfo()["warnings"]))

# 3. Now build one period of blocks with >= VB_THRESHOLD blocks signaling
# some unknown bit
self.send_blocks_with_version(self.nodes[0].p2p, 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 get*info() shows some kind of error.
assert(WARN_UNKNOWN_RULES_MINED in self.nodes[0].getmininginfo()["warnings"])
assert(WARN_UNKNOWN_RULES_MINED in self.nodes[0].getnetworkinfo()["warnings"])
# Mine one period worth of blocks
node.generate(VB_PERIOD)

# 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)
self.stop_nodes()
# Empty out the alert file
with open(self.alert_filename, 'w', encoding='utf8') as _:
pass
self.start_nodes()
self.log.info("Check that there is no warning if previous VB_BLOCKS have <VB_THRESHOLD blocks with unknown versionbits version.")
# Build one period of blocks with < VB_THRESHOLD blocks signaling some unknown bit
self.send_blocks_with_version(node.p2p, VB_THRESHOLD - 1, VB_UNKNOWN_VERSION)
node.generate(VB_PERIOD - VB_THRESHOLD + 1)

# Check that we're not getting any versionbit-related errors in get*info()
assert(not VB_PATTERN.match(node.getmininginfo()["warnings"]))
assert(not VB_PATTERN.match(node.getnetworkinfo()["warnings"]))

# Connecting one block should be enough to generate an error.
self.nodes[0].generate(1)
assert(WARN_UNKNOWN_RULES_ACTIVE in self.nodes[0].getmininginfo()["warnings"])
assert(WARN_UNKNOWN_RULES_ACTIVE in self.nodes[0].getnetworkinfo()["warnings"])
self.stop_nodes()
self.test_versionbits_in_alert_file()
self.log.info("Check that there is a warning if >50 blocks in the last 100 were an unknown version")
# Build one period of blocks with VB_THRESHOLD blocks signaling some unknown bit
self.send_blocks_with_version(node.p2p, VB_THRESHOLD, VB_UNKNOWN_VERSION)
node.generate(VB_PERIOD - VB_THRESHOLD)

# Test framework expects the node to still be running...
self.start_nodes()
# Check that get*info() shows the 51/100 unknown block version error.
assert(WARN_UNKNOWN_RULES_MINED in node.getmininginfo()["warnings"])
assert(WARN_UNKNOWN_RULES_MINED in node.getnetworkinfo()["warnings"])

self.log.info("Check that there is a warning if previous VB_BLOCKS have >=VB_THRESHOLD blocks with unknown versionbits version.")
# Mine a period worth of expected blocks so the generic block-version warning
# is cleared. This will move the versionbit state to ACTIVE.
node.generate(VB_PERIOD)

# Stop-start the node. This is required because bitcoind will only warn once about unknown versions or unknown rules activating.
self.restart_node(0)

# Generating one block guarantees that we'll get out of IBD
node.generate(1)
wait_until(lambda: not node.getblockchaininfo()['initialblockdownload'], timeout=10, lock=mininode_lock)
# Generating one more block will be enough to generate an error.
node.generate(1)
# Check that get*info() shows the versionbits unknown rules warning
assert(WARN_UNKNOWN_RULES_ACTIVE in node.getmininginfo()["warnings"])
assert(WARN_UNKNOWN_RULES_ACTIVE in node.getnetworkinfo()["warnings"])
# Check that the alert file shows the versionbits unknown rules warning
wait_until(lambda: self.versionbits_in_alert_file(), timeout=60)

if __name__ == '__main__':
VersionBitsWarningTest().main()

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