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#!/usr/bin/env python3
# Copyright (c) 2020-2022 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 UTXO set hash value calculation in gettxoutsetinfo."""
from test_framework.messages import (
CBlock,
COutPoint,
from_hex,
)
from test_framework.crypto.muhash import MuHash3072
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
from test_framework.wallet import MiniWallet
class UTXOSetHashTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
self.setup_clean_chain = True
def test_muhash_implementation(self):
self.log.info("Test MuHash implementation consistency")
node = self.nodes[0]
wallet = MiniWallet(node)
mocktime = node.getblockheader(node.getblockhash(0))['time'] + 1
node.setmocktime(mocktime)
# Generate 100 blocks and remove the first since we plan to spend its
# coinbase
block_hashes = self.generate(wallet, 1) + self.generate(node, 99)
blocks = list(map(lambda block: from_hex(CBlock(), node.getblock(block, False)), block_hashes))
blocks.pop(0)
# Create a spending transaction and mine a block which includes it
txid = wallet.send_self_transfer(from_node=node)['txid']
tx_block = self.generateblock(node, output=wallet.get_address(), transactions=[txid])
blocks.append(from_hex(CBlock(), node.getblock(tx_block['hash'], False)))
# Serialize the outputs that should be in the UTXO set and add them to
# a MuHash object
muhash = MuHash3072()
for height, block in enumerate(blocks):
# The Genesis block coinbase is not part of the UTXO set and we
# spent the first mined block
height += 2
for tx in block.vtx:
for n, tx_out in enumerate(tx.vout):
coinbase = 1 if not tx.vin[0].prevout.hash else 0
# Skip witness commitment
if (coinbase and n > 0):
continue
data = COutPoint(int(tx.rehash(), 16), n).serialize()
data += (height * 2 + coinbase).to_bytes(4, "little")
data += tx_out.serialize()
muhash.insert(data)
finalized = muhash.digest()
node_muhash = node.gettxoutsetinfo("muhash")['muhash']
assert_equal(finalized[::-1].hex(), node_muhash)
self.log.info("Test deterministic UTXO set hash results")
assert_equal(node.gettxoutsetinfo()['hash_serialized_3'], "d1c7fec1c0623f6793839878cbe2a531eb968b50b27edd6e2a57077a5aed6094")
assert_equal(node.gettxoutsetinfo("muhash")['muhash'], "d1725b2fe3ef43e55aa4907480aea98d406fc9e0bf8f60169e2305f1fbf5961b")
def run_test(self):
self.test_muhash_implementation()
if __name__ == '__main__':
UTXOSetHashTest().main()
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