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110 lines
5.1 KiB
110 lines
5.1 KiB
#!/usr/bin/env python3
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# Copyright (c) 2016-2018 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Test version bits warning system.
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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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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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from test_framework.messages import msg_block
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from test_framework.mininode import P2PInterface, 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_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: 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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self.setup_clean_chain = True
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self.num_nodes = 1
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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'):
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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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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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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 = 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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height += 1
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tip = block.sha256
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peer.sync_with_ping()
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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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node = self.nodes[0]
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node.add_p2p_connection(P2PInterface())
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# Mine one period worth of blocks
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node.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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# 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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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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# 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. This will move the versionbit state to ACTIVE.
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node.generate(VB_PERIOD)
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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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# 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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