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112 lines
5.2 KiB
112 lines
5.2 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2016-2017 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, 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_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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# 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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# 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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