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feature_loadblock.py
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#!/usr/bin/env python3
# Copyright (c) 2017-2019 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 loadblock option
Test the option to start a node with the option loadblock which loads
a serialized blockchain from a file (usually called bootstrap.dat).
To generate that file this test uses the helper scripts available
in contrib/linearize.
"""
import os
import subprocess
import sys
import tempfile
import urllib
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
class LoadblockTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 2
self.supports_cli = False
def run_test(self):
self.nodes[1].setnetworkactive(state=False)
self.nodes[0].generate(100)
# Parsing the url of our node to get settings for config file
data_dir = self.nodes[0].datadir
node_url = urllib.parse.urlparse(self.nodes[0].url)
cfg_file = os.path.join(data_dir, "linearize.cfg")
bootstrap_file = os.path.join(self.options.tmpdir, "bootstrap.dat")
genesis_block = self.nodes[0].getblockhash(0)
blocks_dir = os.path.join(data_dir, self.chain, "blocks")
hash_list = tempfile.NamedTemporaryFile(dir=data_dir,
mode='w',
delete=False,
encoding="utf-8")
self.log.info("Create linearization config file")
with open(cfg_file, "a", encoding="utf-8") as cfg:
cfg.write("datadir={}\n".format(data_dir))
cfg.write("rpcuser={}\n".format(node_url.username))
cfg.write("rpcpassword={}\n".format(node_url.password))
cfg.write("port={}\n".format(node_url.port))
cfg.write("host={}\n".format(node_url.hostname))
cfg.write("output_file={}\n".format(bootstrap_file))
cfg.write("max_height=100\n")
cfg.write("netmagic=fabfb5da\n")
cfg.write("input={}\n".format(blocks_dir))
cfg.write("genesis={}\n".format(genesis_block))
cfg.write("hashlist={}\n".format(hash_list.name))
base_dir = self.config["environment"]["SRCDIR"]
linearize_dir = os.path.join(base_dir, "contrib", "linearize")
self.log.info("Run linearization of block hashes")
linearize_hashes_file = os.path.join(
linearize_dir, "linearize-hashes.py")
subprocess.run([sys.executable, linearize_hashes_file, cfg_file],
stdout=hash_list,
check=True)
self.log.info("Run linearization of block data")
linearize_data_file = os.path.join(linearize_dir, "linearize-data.py")
subprocess.run([sys.executable, linearize_data_file, cfg_file],
check=True)
self.log.info("Restart second, unsynced node with bootstrap file")
self.restart_node(1, extra_args=["-loadblock=" + bootstrap_file])
# start_node is blocking on all block files being imported
assert_equal(self.nodes[1].getblockcount(), 100)
assert_equal(self.nodes[1].getblockchaininfo()['blocks'], 100)
assert_equal(
self.nodes[0].getbestblockhash(),
self.nodes[1].getbestblockhash())
if __name__ == '__main__':
LoadblockTest().main()

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