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#!/usr/bin/env python3
# Copyright (c) 2019-2022 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 the generation of UTXO snapshots using `dumptxoutset`.
"""
from test_framework.blocktools import COINBASE_MATURITY
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_raises_rpc_error,
sha256sum_file,
)
class DumptxoutsetTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 1
def run_test(self):
"""Test a trivial usage of the dumptxoutset RPC command."""
node = self.nodes[0]
mocktime = node.getblockheader(node.getblockhash(0))['time'] + 1
node.setmocktime(mocktime)
self.generate(node, COINBASE_MATURITY)
FILENAME = 'txoutset.dat'
out = node.dumptxoutset(FILENAME)
expected_path = node.datadir_path / self.chain / FILENAME
assert expected_path.is_file()
assert_equal(out['coins_written'], 100)
assert_equal(out['base_height'], 100)
assert_equal(out['path'], str(expected_path))
# Blockhash should be deterministic based on mocked time.
assert_equal(
out['base_hash'],
'09abf0e7b510f61ca6cf33bab104e9ee99b3528b371d27a2d4b39abb800fba7e')
# UTXO snapshot hash should be deterministic based on mocked time.
assert_equal(
sha256sum_file(str(expected_path)).hex(),
'2f775f82811150d310527b5ff773f81fb0fb517e941c543c1f7c4d38fd2717b3')
assert_equal(
out['txoutset_hash'], 'a0b7baa3bf5ccbd3279728f230d7ca0c44a76e9923fca8f32dbfd08d65ea496a')
assert_equal(out['nchaintx'], 101)
# Specifying a path to an existing or invalid file will fail.
assert_raises_rpc_error(
-8, '{} already exists'.format(FILENAME), node.dumptxoutset, FILENAME)
invalid_path = node.datadir_path / "invalid" / "path"
assert_raises_rpc_error(
-8, "Couldn't open file {}.incomplete for writing".format(invalid_path), node.dumptxoutset, invalid_path)
if __name__ == '__main__':
DumptxoutsetTest(__file__).main()
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