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784f757994
Use object returned from add_p2p_connection to refer to p2ps. Add a test class attribute if it needs to be used across many methods. Don't use the p2p property.
103 lines
4.9 KiB
Python
Executable file
103 lines
4.9 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2016-2019 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.p2p import P2PInterface
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from test_framework.test_framework import BitcoinTestFramework
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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_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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peer = node.add_p2p_connection(P2PInterface())
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node_deterministic_address = node.get_deterministic_priv_key().address
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# Mine one period worth of blocks
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node.generatetoaddress(VB_PERIOD, node_deterministic_address)
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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(peer, VB_THRESHOLD - 1, VB_UNKNOWN_VERSION)
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node.generatetoaddress(VB_PERIOD - VB_THRESHOLD + 1, node_deterministic_address)
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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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# Build one period of blocks with VB_THRESHOLD blocks signaling some unknown bit
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self.send_blocks_with_version(peer, VB_THRESHOLD, VB_UNKNOWN_VERSION)
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node.generatetoaddress(VB_PERIOD - VB_THRESHOLD, node_deterministic_address)
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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.generatetoaddress(VB_PERIOD, node_deterministic_address)
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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.generatetoaddress(1, node_deterministic_address)
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self.wait_until(lambda: not node.getblockchaininfo()['initialblockdownload'])
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# Generating one more block will be enough to generate an error.
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node.generatetoaddress(1, node_deterministic_address)
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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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self.wait_until(lambda: self.versionbits_in_alert_file())
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if __name__ == '__main__':
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VersionBitsWarningTest().main()
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