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#!/usr/bin/env python3
# Copyright (c) 2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test logic for setting -maxtipage on command line.
Nodes don't consider themselves out of "initial block download" as long as
their best known block header time is more than -maxtipage in the past.
"""
import time
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
DEFAULT_MAX_TIP_AGE = 24 * 60 * 60
class MaxTipAgeTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 2
def test_maxtipage(self, maxtipage, set_parameter=True, test_deltas=True):
node_miner = self.nodes[0]
node_ibd = self.nodes[1]
self.restart_node(1, [f'-maxtipage={maxtipage}'] if set_parameter else None)
self.connect_nodes(0, 1)
cur_time = int(time.time())
if test_deltas:
# tips older than maximum age -> stay in IBD
node_ibd.setmocktime(cur_time)
for delta in [5, 4, 3, 2, 1]:
node_miner.setmocktime(cur_time - maxtipage - delta)
self.generate(node_miner, 1)
assert_equal(node_ibd.getblockchaininfo()['initialblockdownload'], True)
# tip within maximum age -> leave IBD
node_miner.setmocktime(max(cur_time - maxtipage, 0))
self.generate(node_miner, 1)
assert_equal(node_ibd.getblockchaininfo()['initialblockdownload'], False)
# reset time to system time so we don't have a time offset with the ibd node the next
# time we connect to it, ensuring TimeOffsets::WarnIfOutOfSync() doesn't output to stderr
node_miner.setmocktime(0)
def run_test(self):
self.log.info("Test IBD with maximum tip age of 24 hours (default).")
self.test_maxtipage(DEFAULT_MAX_TIP_AGE, set_parameter=False)
for hours in [20, 10, 5, 2, 1]:
maxtipage = hours * 60 * 60
self.log.info(f"Test IBD with maximum tip age of {hours} hours (-maxtipage={maxtipage}).")
self.test_maxtipage(maxtipage)
max_long_val = 9223372036854775807
self.log.info(f"Test IBD with highest allowable maximum tip age ({max_long_val}).")
self.test_maxtipage(max_long_val, test_deltas=False)
if __name__ == '__main__':
MaxTipAgeTest().main()
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