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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
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@ -7,25 +7,24 @@
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Generate chains with block versions that appear to be signalling unknown
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soft-forks, and test that warning alerts are generated.
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"""
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from test_framework.mininode import *
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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import os
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import re
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from test_framework.blocktools import create_block, create_coinbase
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VB_PERIOD = 144 # versionbits period length for regtest
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VB_THRESHOLD = 108 # versionbits activation threshold for regtest
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from test_framework.blocktools import create_block, create_coinbase
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from test_framework.messages import msg_block
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from test_framework.mininode import P2PInterface, network_thread_start, mininode_lock
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import wait_until
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VB_PERIOD = 144 # versionbits period length for regtest
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VB_THRESHOLD = 108 # versionbits activation threshold for regtest
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VB_TOP_BITS = 0x20000000
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VB_UNKNOWN_BIT = 27 # Choose a bit unassigned to any deployment
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VB_UNKNOWN_BIT = 27 # Choose a bit unassigned to any deployment
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VB_UNKNOWN_VERSION = VB_TOP_BITS | (1 << VB_UNKNOWN_BIT)
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WARN_UNKNOWN_RULES_MINED = "Unknown block versions being mined! It's possible unknown rules are in effect"
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WARN_UNKNOWN_RULES_ACTIVE = "unknown new rules activated (versionbit {})".format(VB_UNKNOWN_BIT)
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VB_PATTERN = re.compile("^Warning.*versionbit")
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class TestNode(P2PInterface):
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def on_inv(self, message):
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pass
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VB_PATTERN = re.compile("Warning: unknown new rules activated.*versionbit")
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class VersionBitsWarningTest(BitcoinTestFramework):
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def set_test_params(self):
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@ -35,21 +34,21 @@ class VersionBitsWarningTest(BitcoinTestFramework):
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def setup_network(self):
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self.alert_filename = os.path.join(self.options.tmpdir, "alert.txt")
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# Open and close to create zero-length file
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with open(self.alert_filename, 'w', encoding='utf8') as _:
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with open(self.alert_filename, 'w', encoding='utf8'):
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pass
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self.extra_args = [["-alertnotify=echo %s >> \"" + self.alert_filename + "\""]]
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self.setup_nodes()
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# Send numblocks blocks via peer with nVersionToUse set.
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def send_blocks_with_version(self, peer, numblocks, nVersionToUse):
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def send_blocks_with_version(self, peer, numblocks, version):
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"""Send numblocks blocks to peer with version set"""
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tip = self.nodes[0].getbestblockhash()
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height = self.nodes[0].getblockcount()
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block_time = self.nodes[0].getblockheader(tip)["time"]+1
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block_time = self.nodes[0].getblockheader(tip)["time"] + 1
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tip = int(tip, 16)
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for _ in range(numblocks):
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block = create_block(tip, create_coinbase(height+1), block_time)
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block.nVersion = nVersionToUse
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block = create_block(tip, create_coinbase(height + 1), block_time)
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block.nVersion = version
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block.solve()
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peer.send_message(msg_block(block))
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block_time += 1
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@ -57,70 +56,57 @@ class VersionBitsWarningTest(BitcoinTestFramework):
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tip = block.sha256
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peer.sync_with_ping()
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def test_versionbits_in_alert_file(self):
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with open(self.alert_filename, 'r', encoding='utf8') as f:
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alert_text = f.read()
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assert(VB_PATTERN.match(alert_text))
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def versionbits_in_alert_file(self):
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"""Test that the versionbits warning has been written to the alert file."""
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alert_text = open(self.alert_filename, 'r', encoding='utf8').read()
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return VB_PATTERN.search(alert_text) is not None
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def run_test(self):
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# Setup the p2p connection and start up the network thread.
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self.nodes[0].add_p2p_connection(TestNode())
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# Handy alias
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node = self.nodes[0]
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node.add_p2p_connection(P2PInterface())
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network_thread_start()
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node.p2p.wait_for_verack()
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# Test logic begins here
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self.nodes[0].p2p.wait_for_verack()
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# Mine one period worth of blocks
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node.generate(VB_PERIOD)
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# 1. Have the node mine one period worth of blocks
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self.nodes[0].generate(VB_PERIOD)
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self.log.info("Check that there is no warning if previous VB_BLOCKS have <VB_THRESHOLD blocks with unknown versionbits version.")
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# Build one period of blocks with < VB_THRESHOLD blocks signaling some unknown bit
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self.send_blocks_with_version(node.p2p, VB_THRESHOLD - 1, VB_UNKNOWN_VERSION)
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node.generate(VB_PERIOD - VB_THRESHOLD + 1)
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# 2. Now build one period of blocks on the tip, with < VB_THRESHOLD
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# blocks signaling some unknown bit.
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nVersion = VB_TOP_BITS | (1<<VB_UNKNOWN_BIT)
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self.send_blocks_with_version(self.nodes[0].p2p, VB_THRESHOLD-1, nVersion)
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# Check that we're not getting any versionbit-related errors in get*info()
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assert(not VB_PATTERN.match(node.getmininginfo()["warnings"]))
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assert(not VB_PATTERN.match(node.getnetworkinfo()["warnings"]))
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# Fill rest of period with regular version blocks
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self.nodes[0].generate(VB_PERIOD - VB_THRESHOLD + 1)
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# Check that we're not getting any versionbit-related errors in
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# get*info()
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assert(not VB_PATTERN.match(self.nodes[0].getmininginfo()["warnings"]))
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assert(not VB_PATTERN.match(self.nodes[0].getnetworkinfo()["warnings"]))
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self.log.info("Check that there is a warning if >50 blocks in the last 100 were an unknown version")
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# Build one period of blocks with VB_THRESHOLD blocks signaling some unknown bit
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self.send_blocks_with_version(node.p2p, VB_THRESHOLD, VB_UNKNOWN_VERSION)
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node.generate(VB_PERIOD - VB_THRESHOLD)
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# 3. Now build one period of blocks with >= VB_THRESHOLD blocks signaling
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# some unknown bit
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self.send_blocks_with_version(self.nodes[0].p2p, VB_THRESHOLD, nVersion)
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self.nodes[0].generate(VB_PERIOD - VB_THRESHOLD)
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# Might not get a versionbits-related alert yet, as we should
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# have gotten a different alert due to more than 51/100 blocks
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# being of unexpected version.
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# Check that get*info() shows some kind of error.
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assert(WARN_UNKNOWN_RULES_MINED in self.nodes[0].getmininginfo()["warnings"])
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assert(WARN_UNKNOWN_RULES_MINED in self.nodes[0].getnetworkinfo()["warnings"])
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# Check that get*info() shows the 51/100 unknown block version error.
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assert(WARN_UNKNOWN_RULES_MINED in node.getmininginfo()["warnings"])
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assert(WARN_UNKNOWN_RULES_MINED in node.getnetworkinfo()["warnings"])
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self.log.info("Check that there is a warning if previous VB_BLOCKS have >=VB_THRESHOLD blocks with unknown versionbits version.")
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# Mine a period worth of expected blocks so the generic block-version warning
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# is cleared, and restart the node. This should move the versionbit state
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# to ACTIVE.
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self.nodes[0].generate(VB_PERIOD)
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self.stop_nodes()
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# Empty out the alert file
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with open(self.alert_filename, 'w', encoding='utf8') as _:
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pass
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self.start_nodes()
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# is cleared. This will move the versionbit state to ACTIVE.
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node.generate(VB_PERIOD)
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# TODO this is a workaround. We have to wait for IBD to finish before we generate a block, as otherwise there
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# won't be any warning generated. This workaround must be removed when we backport https://github.com/bitcoin/bitcoin/pull/12264
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self.nodes[0].generate(1)
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time.sleep(5)
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# Stop-start the node. This is required because bitcoind will only warn once about unknown versions or unknown rules activating.
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self.restart_node(0)
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# Connecting one block should be enough to generate an error.
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self.nodes[0].generate(1)
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assert(WARN_UNKNOWN_RULES_ACTIVE in self.nodes[0].getmininginfo()["warnings"])
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assert(WARN_UNKNOWN_RULES_ACTIVE in self.nodes[0].getnetworkinfo()["warnings"])
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self.stop_nodes()
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self.test_versionbits_in_alert_file()
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# Test framework expects the node to still be running...
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self.start_nodes()
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# Generating one block guarantees that we'll get out of IBD
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node.generate(1)
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wait_until(lambda: not node.getblockchaininfo()['initialblockdownload'], timeout=10, lock=mininode_lock)
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# Generating one more block will be enough to generate an error.
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node.generate(1)
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# Check that get*info() shows the versionbits unknown rules warning
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assert(WARN_UNKNOWN_RULES_ACTIVE in node.getmininginfo()["warnings"])
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assert(WARN_UNKNOWN_RULES_ACTIVE in node.getnetworkinfo()["warnings"])
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# Check that the alert file shows the versionbits unknown rules warning
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wait_until(lambda: self.versionbits_in_alert_file(), timeout=60)
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if __name__ == '__main__':
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VersionBitsWarningTest().main()
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