130 lines
5.5 KiB
Python
Executable File
130 lines
5.5 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2016 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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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 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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VB_TOP_BITS = 0x20000000
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VB_UNKNOWN_BIT = 27 # Choose a bit unassigned to any deployment
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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(NodeConnCB):
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def on_inv(self, conn, message):
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pass
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class VersionBitsWarningTest(BitcoinTestFramework):
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def __init__(self):
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super().__init__()
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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') as _:
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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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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 = nVersionToUse
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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 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 run_test(self):
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# Setup the p2p connection and start up the network thread.
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test_node = TestNode()
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connections = []
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connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_node))
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test_node.add_connection(connections[0])
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NetworkThread().start() # Start up network handling in another thread
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# Test logic begins here
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test_node.wait_for_verack()
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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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# 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(test_node, VB_THRESHOLD-1, nVersion)
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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].getinfo()["errors"]))
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assert(not VB_PATTERN.match(self.nodes[0].getmininginfo()["errors"]))
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assert(not VB_PATTERN.match(self.nodes[0].getnetworkinfo()["warnings"]))
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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(test_node, 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].getinfo()["errors"])
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assert(WARN_UNKNOWN_RULES_MINED in self.nodes[0].getmininginfo()["errors"])
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assert(WARN_UNKNOWN_RULES_MINED in self.nodes[0].getnetworkinfo()["warnings"])
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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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stop_nodes(self.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.nodes = start_nodes(self.num_nodes, self.options.tmpdir, self.extra_args)
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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].getinfo()["errors"])
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assert(WARN_UNKNOWN_RULES_ACTIVE in self.nodes[0].getmininginfo()["errors"])
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assert(WARN_UNKNOWN_RULES_ACTIVE in self.nodes[0].getnetworkinfo()["warnings"])
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stop_nodes(self.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.nodes = start_nodes(self.num_nodes, self.options.tmpdir, self.extra_args)
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if __name__ == '__main__':
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VersionBitsWarningTest().main()
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